/* roulang page: index */
:root {
            --primary: #0B1220;
            --primary-soft: #111B30;
            --accent: #E8A93D;
            --accent-hover: #C7912E;
            --bg-light: #F5F0E6;
            --bg-light-soft: #EDE8DC;
            --text-dark: #E8ECF1;
            --text-light: #1A2233;
            --text-muted-dark: #8B94A7;
            --text-muted-light: #6B7280;
            --border-dark: rgba(232, 169, 61, 0.18);
            --border-light: rgba(26, 34, 51, 0.12);
            --radius-card-lg: 12px;
            --radius-card-sm: 8px;
            --radius-btn: 6px;
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-light: 0 4px 16px rgba(11, 18, 32, 0.08);
            --container-max: 1200px;
            --transition: 0.25s ease;
            --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-light);
            background-color: var(--primary);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card-sm);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
        }

        a:hover {
            color: var(--accent);
        }

        button,
        input,
        textarea {
            font-family: var(--font-sans);
            font-size: 16px;
            color: inherit;
            outline: none;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 100px 0;
        }

        .section-dark {
            background-color: var(--primary);
            color: var(--text-dark);
        }

        .section-light {
            background-color: var(--bg-light);
            color: var(--text-light);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .section-subtitle {
            font-size: 16px;
            font-weight: 400;
            line-height: 1.9;
            margin-bottom: 48px;
            max-width: 720px;
            color: var(--text-muted-dark);
        }

        .section-light .section-subtitle {
            color: var(--text-muted-light);
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(232, 169, 61, 0.12);
            border: 1px solid var(--border-dark);
            border-radius: 20px;
            padding: 4px 14px;
            margin-bottom: 16px;
            letter-spacing: 0.05em;
        }

        .section-light .section-tag {
            background: rgba(232, 169, 61, 0.10);
            border-color: var(--border-light);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 15px;
            letter-spacing: 0.03em;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .btn:focus-visible {
            outline: 2px solid rgba(232, 169, 61, 0.4);
            outline-offset: 2px;
        }

        .btn-primary {
            background-color: var(--accent);
            color: #1A2233;
            border-color: var(--accent);
        }

        .btn-primary:hover {
            background-color: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #1A2233;
        }

        .btn-primary:active {
            transform: translateY(1px);
        }

        .btn-outline {
            background: transparent;
            color: var(--accent);
            border-color: var(--accent);
        }

        .btn-outline:hover {
            background: rgba(232, 169, 61, 0.10);
            color: var(--accent);
        }

        .btn-outline:active {
            transform: translateY(1px);
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            padding: 4px 0;
            border-bottom: 1px solid transparent;
            transition: all var(--transition);
        }

        .btn-text:hover {
            border-bottom-color: var(--accent);
            color: var(--accent);
        }

        .btn-text .arrow {
            font-size: 18px;
            transition: transform var(--transition);
        }

        .btn-text:hover .arrow {
            transform: translateX(4px);
        }

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 18, 32, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(232, 169, 61, 0.10);
            transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(11, 18, 32, 0.96);
            border-bottom-color: var(--border-dark);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo {
            font-size: 24px;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: 0.06em;
            position: relative;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .logo::before {
            content: '';
            width: 10px;
            height: 10px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 12px rgba(232, 169, 61, 0.6);
            flex-shrink: 0;
        }

        .logo:hover {
            color: var(--accent);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .main-nav a {
            color: var(--text-dark);
            font-size: 15px;
            font-weight: 500;
            letter-spacing: 0.02em;
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }

        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
            transition: width var(--transition);
        }

        .main-nav a:hover {
            color: var(--accent);
        }

        .main-nav a:hover::after {
            width: 100%;
        }

        .main-nav a.active {
            color: var(--accent);
            font-weight: 700;
        }

        .main-nav a.active::after {
            width: 100%;
        }

        .header-cta {
            flex-shrink: 0;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
            z-index: 1001;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-dark);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(11, 18, 32, 0.97);
            z-index: 999;
            padding: 32px 24px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }

        .mobile-nav-overlay.active {
            display: flex;
        }

        .mobile-nav-overlay a {
            color: var(--text-dark);
            font-size: 18px;
            font-weight: 600;
            padding: 14px 16px;
            border-radius: var(--radius-card-sm);
            transition: all var(--transition);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .mobile-nav-overlay a.active {
            color: var(--accent);
            background: rgba(232, 169, 61, 0.08);
            border-left: 3px solid var(--accent);
        }

        .mobile-nav-overlay a:hover {
            background: rgba(232, 169, 61, 0.06);
            color: var(--accent);
        }

        .mobile-nav-overlay .mobile-cta {
            margin-top: 16px;
            width: 100%;
        }

        /* Hero */
        .hero {
            min-height: 82vh;
            display: flex;
            align-items: center;
            background-color: var(--primary);
            background-image:
                radial-gradient(ellipse at 20% 30%, rgba(232, 169, 61, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 70%, rgba(232, 169, 61, 0.05) 0%, transparent 50%),
                url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 120px 0 60px;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 18, 32, 0.70) 0%, rgba(11, 18, 32, 0.85) 100%);
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-content {
            max-width: 680px;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(232, 169, 61, 0.10);
            border: 1px solid rgba(232, 169, 61, 0.25);
            letter-spacing: 0.03em;
        }

        .hero-badge::before {
            content: '';
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 8px rgba(232, 169, 61, 0.5);
        }

        .hero h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.3;
            color: #F5F0E6;
            letter-spacing: 0.03em;
            margin-bottom: 20px;
        }

        .hero h1 .highlight {
            color: var(--accent);
            position: relative;
        }

        .hero-subtitle {
            font-size: 17px;
            font-weight: 400;
            line-height: 1.9;
            color: #B8C4D8;
            margin-bottom: 32px;
            max-width: 580px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 36px;
        }

        .hero-qualification {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            padding-top: 24px;
            border-top: 1px solid rgba(232, 169, 61, 0.15);
        }

        .hero-qual-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #B8C4D8;
            font-size: 14px;
            font-weight: 500;
        }

        .hero-qual-item .icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            border: 1px solid rgba(232, 169, 61, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 14px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .hero-data-row {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            margin-top: 20px;
        }

        .hero-data-item {
            display: flex;
            flex-direction: column;
        }

        .hero-data-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }

        .hero-data-label {
            font-size: 13px;
            color: var(--text-muted-dark);
            font-weight: 500;
        }

        /* 卖点三连 */
        .selling-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .selling-card {
            background: var(--primary-soft);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-lg);
            padding: 36px 30px;
            box-shadow: var(--shadow-dark);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .selling-card:hover {
            transform: translateY(-6px);
            border-color: var(--accent);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
        }

        .selling-card .card-number {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.08em;
            margin-bottom: 12px;
        }

        .selling-card h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 14px;
            line-height: 1.4;
        }

        .selling-card p {
            font-size: 15px;
            color: var(--text-muted-dark);
            line-height: 1.9;
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .selling-card .btn-text {
            align-self: flex-start;
        }

        /* 场景演示 */
        .scene-demo-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .scene-demo-image {
            border-radius: var(--radius-card-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            aspect-ratio: 4/3;
            background-color: var(--bg-light-soft);
            position: relative;
        }

        .scene-demo-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-card-lg);
        }

        .scene-demo-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 18, 32, 0.15) 0%, transparent 60%);
            pointer-events: none;
            border-radius: var(--radius-card-lg);
        }

        .scene-demo-text h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .scene-demo-text p {
            font-size: 16px;
            color: var(--text-muted-light);
            line-height: 1.9;
            margin-bottom: 16px;
        }

        .scene-demo-text .scene-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 12px;
        }

        .scene-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-hover);
            background: rgba(232, 169, 61, 0.08);
            border: 1px solid rgba(232, 169, 61, 0.2);
            border-radius: 16px;
            padding: 4px 12px;
        }

        /* 社会认同 */
        .social-proof-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-bottom: 40px;
        }

        .proof-card {
            background: rgba(11, 18, 32, 0.06);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card-lg);
            padding: 28px 24px;
            transition: all var(--transition);
        }

        .proof-card:hover {
            border-color: rgba(232, 169, 61, 0.4);
            box-shadow: var(--shadow-light);
        }

        .proof-card .proof-quote {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.9;
            margin-bottom: 16px;
            font-style: italic;
        }

        .proof-card .proof-author {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-light);
        }

        .proof-card .proof-role {
            font-size: 13px;
            color: var(--text-muted-light);
            margin-top: 2px;
        }

        .proof-stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            padding-top: 32px;
            border-top: 1px solid var(--border-light);
        }

        .proof-stat {
            text-align: center;
        }

        .proof-stat .stat-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--accent-hover);
            line-height: 1.2;
            letter-spacing: 0.02em;
        }

        .proof-stat .stat-label {
            font-size: 14px;
            color: var(--text-muted-light);
            font-weight: 500;
        }

        /* 版本更新 changelog */
        .changelog-list {
            max-width: 760px;
        }

        .changelog-item {
            display: flex;
            gap: 24px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-dark);
            transition: background-color var(--transition);
        }

        .changelog-item:last-child {
            border-bottom: none;
        }

        .changelog-version {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
            min-width: 70px;
            white-space: nowrap;
            padding-top: 2px;
        }

        .changelog-content h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .changelog-content p {
            font-size: 15px;
            color: var(--text-muted-dark);
            line-height: 1.9;
        }

        /* 议程时间线 */
        .timeline {
            position: relative;
            max-width: 760px;
            padding-left: 32px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: rgba(232, 169, 61, 0.3);
        }

        .timeline-item {
            position: relative;
            padding-bottom: 36px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -29px;
            top: 6px;
            width: 12px;
            height: 12px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 10px rgba(232, 169, 61, 0.5);
        }

        .timeline-time {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.04em;
            margin-bottom: 6px;
        }

        .timeline-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .timeline-desc {
            font-size: 15px;
            color: var(--text-muted-dark);
            line-height: 1.9;
        }

        /* 资讯/新闻 */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .news-item {
            display: flex;
            gap: 20px;
            padding: 20px 16px;
            border-radius: var(--radius-card-sm);
            border-bottom: 1px solid var(--border-dark);
            transition: all var(--transition);
        }

        .news-item:hover {
            background: rgba(232, 169, 61, 0.04);
        }

        .news-item:hover .news-title {
            color: var(--accent);
        }

        .news-date {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted-dark);
            min-width: 90px;
            padding-top: 2px;
            white-space: nowrap;
        }

        .news-content {
            flex: 1;
        }

        .news-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 6px;
            transition: color var(--transition);
            line-height: 1.5;
        }

        .news-summary {
            font-size: 14px;
            color: var(--text-muted-dark);
            line-height: 1.85;
            margin-bottom: 8px;
        }

        .news-content .btn-text {
            font-size: 13px;
        }

        /* 品牌介绍 */
        .brand-intro {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 48px;
            align-items: center;
        }

        .brand-image {
            border-radius: var(--radius-card-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-light);
            aspect-ratio: 4/3;
            background-color: var(--bg-light-soft);
            position: relative;
        }

        .brand-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-card-lg);
        }

        .brand-text h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .brand-text p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 2;
            margin-bottom: 14px;
            opacity: 0.85;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--primary-soft);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-sm);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(232, 169, 61, 0.4);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
            list-style: none;
            transition: all var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-icon {
            font-size: 22px;
            font-weight: 300;
            color: var(--accent);
            flex-shrink: 0;
            transition: transform var(--transition);
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(232, 169, 61, 0.3);
            border-radius: 50%;
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
        }

        .faq-item[open] {
            border-left: 3px solid var(--accent);
            background: rgba(232, 169, 61, 0.04);
        }

        .faq-item .faq-answer {
            padding: 0 24px 20px 24px;
            font-size: 15px;
            color: var(--text-muted-dark);
            line-height: 1.95;
        }

        /* 联系/转化表单 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .contact-info {
            background: var(--primary-soft);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-lg);
            padding: 40px 32px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .contact-info h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.5;
        }

        .contact-info p {
            font-size: 15px;
            color: var(--text-muted-dark);
            line-height: 1.9;
        }

        .contact-info-rows {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .contact-info-row {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-dark);
            font-size: 15px;
            font-weight: 500;
        }

        .contact-info-row .dot {
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            flex-shrink: 0;
            box-shadow: 0 0 8px rgba(232, 169, 61, 0.4);
        }

        .contact-form-wrapper {
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card-lg);
            padding: 40px 32px;
            box-shadow: var(--shadow-light);
        }

        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .form-group label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-light);
        }

        .form-group input,
        .form-group textarea {
            padding: 12px 16px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-light);
            background: #fff;
            color: var(--text-light);
            font-size: 15px;
            transition: all var(--transition);
        }

        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(232, 169, 61, 0.15);
            outline: none;
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: #9CA3AF;
        }

        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }

        .form-submit {
            align-self: flex-start;
        }

        /* 页脚 */
        .site-footer {
            background-color: #080D18;
            border-top: 1px solid rgba(232, 169, 61, 0.15);
            padding: 56px 0 32px;
            color: #B8C4D8;
        }

        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: space-between;
            margin-bottom: 36px;
        }

        .footer-brand {
            max-width: 320px;
        }

        .footer-brand .logo {
            font-size: 22px;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted-dark);
            line-height: 1.85;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .footer-link-group h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
            letter-spacing: 0.04em;
        }

        .footer-link-group a {
            display: block;
            font-size: 14px;
            color: #9AA5B8;
            padding: 4px 0;
            transition: all var(--transition);
        }

        .footer-link-group a:hover {
            color: var(--accent);
            text-decoration: underline;
        }

        .footer-bottom {
            border-top: 1px solid rgba(232, 169, 61, 0.10);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: #8B94A7;
        }

        .footer-bottom a {
            color: #9AA5B8;
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--accent);
            text-decoration: underline;
        }

        .footer-bottom .sep {
            color: rgba(232, 169, 61, 0.3);
            margin: 0 6px;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .section {
                padding: 70px 0;
            }
            .hero {
                min-height: 70vh;
                padding: 100px 0 40px;
            }
            .hero h1 {
                font-size: 38px;
            }
            .selling-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .social-proof-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .proof-stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .brand-intro {
                gap: 32px;
            }
            .contact-grid {
                gap: 28px;
            }
            .main-nav {
                gap: 18px;
            }
            .main-nav a {
                font-size: 14px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 60px;
            }
            .main-nav {
                display: none;
            }
            .header-cta {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-nav-overlay.active {
                display: flex;
            }
            .section {
                padding: 50px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .hero {
                min-height: auto;
                padding: 80px 0 40px;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-data-row {
                gap: 20px;
            }
            .hero-data-number {
                font-size: 28px;
            }
            .selling-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .scene-demo-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .social-proof-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .proof-stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .brand-intro {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .contact-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .contact-info,
            .contact-form-wrapper {
                padding: 28px 20px;
            }
            .news-item {
                flex-direction: column;
                gap: 6px;
                padding: 16px 12px;
            }
            .news-date {
                min-width: auto;
                font-size: 12px;
            }
            .changelog-item {
                flex-direction: column;
                gap: 8px;
            }
            .changelog-version {
                min-width: auto;
            }
            .footer-inner {
                flex-direction: column;
                gap: 28px;
            }
            .footer-links {
                gap: 24px;
                flex-direction: column;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
            .hero-qualification {
                flex-direction: column;
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 28px;
                line-height: 1.35;
            }
            .hero-subtitle {
                font-size: 14px;
                line-height: 1.8;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .btn {
                padding: 12px 20px;
                font-size: 14px;
            }
            .section-title {
                font-size: 22px;
            }
            .section-subtitle {
                font-size: 14px;
                margin-bottom: 32px;
            }
            .selling-card {
                padding: 24px 18px;
            }
            .selling-card h3 {
                font-size: 19px;
            }
            .proof-stats-row {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .proof-stat .stat-number {
                font-size: 32px;
            }
            .faq-item summary {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-item .faq-answer {
                padding: 0 16px 16px 16px;
                font-size: 14px;
            }
            .contact-form-wrapper,
            .contact-info {
                padding: 20px 16px;
                border-radius: var(--radius-card-sm);
            }
            .form-submit {
                width: 100%;
            }
            .form-group input,
            .form-group textarea {
                font-size: 14px;
                padding: 10px 14px;
            }
            .news-title {
                font-size: 15px;
            }
            .news-summary {
                font-size: 13px;
            }
            .timeline {
                padding-left: 24px;
            }
            .timeline-item::before {
                left: -21px;
                width: 10px;
                height: 10px;
            }
            .timeline::before {
                left: 4px;
            }
            .timeline-title {
                font-size: 16px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0B1220;
            --primary-soft: #111B30;
            --accent: #E8A93D;
            --accent-hover: #C7912E;
            --bg-light: #F5F0E6;
            --bg-light-soft: #EDE8DC;
            --text-dark: #E8ECF1;
            --text-light: #1A2233;
            --text-muted-dark: #8B94A7;
            --text-muted-light: #6B7280;
            --border-dark: rgba(232, 169, 61, 0.18);
            --border-light: rgba(26, 34, 51, 0.12);
            --radius-card-lg: 12px;
            --radius-card-sm: 8px;
            --radius-btn: 6px;
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-light: 0 4px 16px rgba(11, 18, 32, 0.08);
            --container-max: 1200px;
            --transition: 0.25s ease;
            --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-light);
            background-color: var(--primary);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card-sm);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition), text-decoration-color var(--transition);
        }

        a:hover {
            color: var(--accent);
        }

        button,
        input,
        textarea {
            font-family: var(--font-sans);
            font-size: 16px;
            color: inherit;
            outline: none;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 80px 0;
        }

        .section-dark {
            background-color: var(--primary);
            color: var(--text-dark);
        }

        .section-light {
            background-color: var(--bg-light);
            color: var(--text-light);
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .section-subtitle {
            font-size: 16px;
            font-weight: 400;
            line-height: 1.9;
            margin-bottom: 40px;
            max-width: 720px;
            color: var(--text-muted-dark);
        }

        .section-light .section-subtitle {
            color: var(--text-muted-light);
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(232, 169, 61, 0.12);
            border: 1px solid var(--border-dark);
            border-radius: 20px;
            padding: 4px 14px;
            margin-bottom: 16px;
            letter-spacing: 0.05em;
        }

        .section-light .section-tag {
            background: rgba(232, 169, 61, 0.10);
            border-color: var(--border-light);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 15px;
            letter-spacing: 0.03em;
            transition: all var(--transition);
            border: 1px solid transparent;
            line-height: 1.5;
        }

        .btn:focus-visible {
            outline: 2px solid rgba(232, 169, 61, 0.4);
            outline-offset: 2px;
        }

        .btn-primary {
            background-color: var(--accent);
            color: #1A2233;
            border-color: var(--accent);
        }

        .btn-primary:hover {
            background-color: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #1A2233;
        }

        .btn-primary:active {
            transform: translateY(1px);
        }

        .btn-outline {
            background: transparent;
            color: var(--accent);
            border-color: var(--accent);
        }

        .btn-outline:hover {
            background: rgba(232, 169, 61, 0.10);
            color: var(--accent);
        }

        .btn-outline:active {
            transform: translateY(1px);
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            padding: 4px 0;
            border-bottom: 1px solid transparent;
            transition: all var(--transition);
        }

        .btn-text:hover {
            border-bottom-color: var(--accent);
            color: var(--accent);
        }

        .btn-text .arrow {
            font-size: 18px;
            transition: transform var(--transition);
        }

        .btn-text:hover .arrow {
            transform: translateX(4px);
        }

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 18, 32, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(232, 169, 61, 0.10);
            transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(11, 18, 32, 0.96);
            border-bottom-color: var(--border-dark);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .logo {
            font-size: 24px;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: 0.04em;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .logo:hover {
            color: var(--accent);
        }

        .logo::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 12px rgba(232, 169, 61, 0.7);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 26px;
            flex-wrap: nowrap;
        }

        .main-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            position: relative;
            padding: 6px 0;
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .main-nav a:hover {
            color: var(--accent);
        }

        .main-nav a.active {
            color: var(--accent);
            font-weight: 600;
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-cta {
            background: var(--accent);
            color: #1A2233;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 14px;
            border: 1px solid var(--accent);
            flex-shrink: 0;
        }

        .nav-cta:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #1A2233;
        }

        .nav-cta:active {
            transform: translateY(1px);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
        }

        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-dark);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Breadcrumb */
        .breadcrumb-row {
            background: rgba(11, 18, 32, 0.6);
            border-bottom: 1px solid rgba(232, 169, 61, 0.08);
            padding: 20px 0;
            margin-top: 72px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted-dark);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-muted-dark);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .sep {
            color: rgba(232, 169, 61, 0.4);
        }

        .breadcrumb .current {
            color: var(--accent);
            font-weight: 600;
        }

        /* Category Hero */
        .category-hero {
            background: linear-gradient(180deg, rgba(11, 18, 32, 0.95) 0%, rgba(11, 18, 32, 0.98) 100%);
            color: var(--text-dark);
            padding: 64px 0 48px;
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(232, 169, 61, 0.10) 0%, transparent 70%);
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -40px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(232, 169, 61, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .category-hero-inner {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .category-hero h1 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: 0.02em;
            color: var(--text-dark);
            margin-bottom: 12px;
        }

        .category-hero h1 .highlight {
            color: var(--accent);
        }

        .category-hero .hero-sub {
            font-size: 17px;
            color: var(--text-muted-dark);
            line-height: 1.85;
            max-width: 720px;
        }

        .category-hero .hero-stats {
            display: flex;
            gap: 32px;
            flex-shrink: 0;
        }

        .hero-stat-item {
            text-align: center;
        }

        .hero-stat-item .stat-num {
            font-size: 38px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }

        .hero-stat-item .stat-label {
            font-size: 13px;
            color: var(--text-muted-dark);
            margin-top: 4px;
        }

        /* Main Content Layout */
        .content-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            align-items: start;
        }

        .article-list {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }

        .article-item {
            display: flex;
            gap: 20px;
            padding: 24px;
            border-radius: var(--radius-card-lg);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-dark);
            transition: all var(--transition);
            position: relative;
        }

        .article-item:hover {
            background: rgba(255, 255, 255, 0.05);
            border-color: var(--accent);
            transform: translateY(-3px);
            box-shadow: var(--shadow-dark);
        }

        .article-thumb {
            flex-shrink: 0;
            width: 140px;
            height: 100px;
            border-radius: var(--radius-card-sm);
            overflow: hidden;
            background: var(--primary-soft);
            position: relative;
        }

        .article-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-card-sm);
            transition: transform var(--transition);
        }

        .article-item:hover .article-thumb img {
            transform: scale(1.05);
        }

        .article-thumb.no-img {
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted-dark);
            font-size: 24px;
        }

        .article-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .article-date {
            font-size: 13px;
            color: var(--text-muted-dark);
            letter-spacing: 0.04em;
        }

        .article-title {
            font-size: 19px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-dark);
            text-decoration: underline;
            text-decoration-color: transparent;
            text-underline-offset: 4px;
            transition: all var(--transition);
        }

        .article-item:hover .article-title {
            color: var(--accent);
            text-decoration-color: var(--accent);
        }

        .article-excerpt {
            font-size: 15px;
            color: var(--text-muted-dark);
            line-height: 1.8;
        }

        .article-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 4px;
            transition: all var(--transition);
        }

        .article-link .arrow {
            font-size: 16px;
            transition: transform var(--transition);
        }

        .article-link:hover .arrow {
            transform: translateX(4px);
        }

        .article-link:hover {
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        /* Sidebar */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
            position: sticky;
            top: 92px;
        }

        .sidebar-widget {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-lg);
            padding: 22px;
        }

        .sidebar-widget h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-dark);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag {
            font-size: 13px;
            color: var(--text-dark);
            padding: 5px 12px;
            border-radius: 20px;
            border: 1px solid var(--border-dark);
            background: rgba(232, 169, 61, 0.05);
            transition: all var(--transition);
            cursor: pointer;
        }

        .tag:hover {
            background: rgba(232, 169, 61, 0.15);
            border-color: var(--accent);
            color: var(--accent);
        }

        .hot-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid rgba(232, 169, 61, 0.08);
            transition: all var(--transition);
        }

        .hot-item:last-child {
            border-bottom: none;
        }

        .hot-item .hot-num {
            font-size: 18px;
            font-weight: 800;
            color: var(--accent);
            flex-shrink: 0;
            width: 28px;
        }

        .hot-item .hot-title {
            font-size: 14px;
            color: var(--text-muted-dark);
            line-height: 1.5;
            transition: color var(--transition);
        }

        .hot-item:hover .hot-title {
            color: var(--accent);
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 44px;
            flex-wrap: wrap;
        }

        .pagination a,
        .pagination .page-current {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            border-radius: 50%;
            font-size: 15px;
            font-weight: 600;
            transition: all var(--transition);
            padding: 0 8px;
        }

        .pagination a {
            color: var(--text-muted-dark);
            border: 1px solid var(--border-dark);
        }

        .pagination a:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .pagination .page-current {
            background: var(--accent);
            color: #1A2233;
            border: 1px solid var(--accent);
        }

        .pagination .page-prev,
        .pagination .page-next {
            min-width: auto;
            padding: 0 16px;
            border-radius: 20px;
            font-size: 14px;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, rgba(11, 18, 32, 0.98) 0%, rgba(17, 27, 48, 0.98) 100%);
            border-top: 1px solid var(--border-dark);
            border-bottom: 1px solid var(--border-dark);
            padding: 64px 0;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 16px;
            color: var(--text-muted-dark);
            max-width: 560px;
            margin: 0 auto 26px;
            line-height: 1.85;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* FAQ Section */
        .faq-section {
            background: var(--bg-light);
            color: var(--text-light);
        }

        .faq-list {
            max-width: 800px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card-sm);
            overflow: hidden;
            background: #FFFFFF;
            transition: all var(--transition);
        }

        .faq-item[open] {
            border-left: 3px solid var(--accent);
            background: #FFFFFF;
            box-shadow: var(--shadow-light);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-light);
            cursor: pointer;
            list-style: none;
            transition: all var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            color: var(--accent);
        }

        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            color: var(--accent);
            transition: all var(--transition);
        }

        .faq-item[open] summary {
            color: var(--accent);
            background: rgba(232, 169, 61, 0.04);
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
            background: var(--accent);
            color: #1A2233;
            border-color: var(--accent);
        }

        .faq-answer {
            padding: 0 20px 20px;
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-muted-light);
        }

        /* Footer */
        .site-footer {
            background: #080E1A;
            color: var(--text-muted-dark);
            padding: 56px 0 28px;
            border-top: 1px solid rgba(232, 169, 61, 0.08);
        }

        .footer-inner {
            display: flex;
            justify-content: space-between;
            gap: 48px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .footer-brand {
            max-width: 360px;
        }

        .footer-brand .logo {
            font-size: 22px;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-muted-dark);
        }

        .footer-links {
            display: flex;
            gap: 48px;
            flex-wrap: wrap;
        }

        .footer-link-group h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 14px;
        }

        .footer-link-group a {
            display: block;
            font-size: 14px;
            color: var(--text-muted-dark);
            padding: 5px 0;
            transition: all var(--transition);
        }

        .footer-link-group a:hover {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 22px;
            border-top: 1px solid rgba(232, 169, 61, 0.08);
            font-size: 13px;
        }

        .footer-bottom .sep {
            margin: 0 8px;
            color: rgba(139, 148, 167, 0.4);
        }

        .footer-bottom a {
            color: var(--text-muted-dark);
        }

        .footer-bottom a:hover {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        /* Mobile Menu */
        @media (max-width: 1024px) {
            .content-layout {
                grid-template-columngrid-template-columns: 1fr 300px;
            gap: 40px;
            align-items: start;
        }

        @media (max-width: 1024px) {
            .content-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }
            .sidebar-widget {
                flex: 1 1 45%;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 60px;
                gap: 12px;
            }
            .logo {
                font-size: 20px;
            }
            .main-nav {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: rgba(11, 18, 32, 0.98);
                border-bottom: 1px solid var(--border-dark);
                flex-direction: column;
                padding: 20px 24px;
                gap: 14px;
                display: none;
                box-shadow: var(--shadow-dark);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                font-size: 16px;
                padding: 8px 0;
                width: 100%;
                text-align: center;
            }
            .main-nav a.active::after {
                bottom: 0;
                height: 2px;
            }
            .nav-cta {
                width: 100%;
                text-align: center;
                padding: 12px;
            }
            .hamburger {
                display: flex;
            }
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .category-hero {
                padding: 48px 0 36px;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero .hero-stats {
                gap: 20px;
            }
            .hero-stat-item .stat-num {
                font-size: 28px;
            }
            .article-item {
                flex-direction: column;
                gap: 14px;
                padding: 18px;
            }
            .article-thumb {
                width: 100%;
                height: 180px;
            }
            .sidebar-widget {
                flex: 1 1 100%;
            }
            .footer-inner {
                gap: 32px;
            }
            .footer-links {
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .section-title {
                font-size: 23px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero .hero-sub {
                font-size: 15px;
            }
            .article-title {
                font-size: 17px;
            }
            .btn {
                padding: 11px 20px;
                font-size: 14px;
            }
            .pagination a,
            .pagination .page-current {
                min-width: 36px;
                height: 36px;
                font-size: 14px;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .faq-item summary {
                font-size: 15px;
                padding: 14px 16px;
            }
            .faq-answer {
                padding: 0 16px 16px;
                font-size: 14px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0B1220;
            --primary-soft: #111B30;
            --accent: #E8A93D;
            --accent-hover: #C7912E;
            --bg-light: #F5F0E6;
            --bg-light-soft: #EDE8DC;
            --text-dark: #E8ECF1;
            --text-light: #1A2233;
            --text-muted-dark: #8B94A7;
            --text-muted-light: #6B7280;
            --border-dark: rgba(232, 169, 61, 0.18);
            --border-light: rgba(26, 34, 51, 0.12);
            --radius-card-lg: 12px;
            --radius-card-sm: 8px;
            --radius-btn: 6px;
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-light: 0 4px 16px rgba(11, 18, 32, 0.08);
            --container-max: 1200px;
            --transition: 0.25s ease;
            --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-light);
            background-color: var(--primary);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card-sm);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
        }

        a:hover {
            color: var(--accent);
        }

        button,
        input,
        textarea {
            font-family: var(--font-sans);
            font-size: 16px;
            color: inherit;
            outline: none;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 80px 0;
        }

        .section-dark {
            background-color: var(--primary);
            color: var(--text-dark);
        }

        .section-light {
            background-color: var(--bg-light);
            color: var(--text-light);
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .section-subtitle {
            font-size: 16px;
            font-weight: 400;
            line-height: 1.9;
            margin-bottom: 48px;
            max-width: 720px;
            color: var(--text-muted-dark);
        }

        .section-light .section-subtitle {
            color: var(--text-muted-light);
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(232, 169, 61, 0.12);
            border: 1px solid var(--border-dark);
            border-radius: 20px;
            padding: 4px 14px;
            margin-bottom: 16px;
            letter-spacing: 0.05em;
        }

        .section-light .section-tag {
            background: rgba(232, 169, 61, 0.10);
            border-color: var(--border-light);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 15px;
            letter-spacing: 0.03em;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .btn:focus-visible {
            outline: 2px solid rgba(232, 169, 61, 0.4);
            outline-offset: 2px;
        }

        .btn-primary {
            background-color: var(--accent);
            color: #1A2233;
            border-color: var(--accent);
        }

        .btn-primary:hover {
            background-color: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #1A2233;
        }

        .btn-primary:active {
            transform: translateY(1px);
        }

        .btn-outline {
            background: transparent;
            color: var(--accent);
            border-color: var(--accent);
        }

        .btn-outline:hover {
            background: rgba(232, 169, 61, 0.10);
            color: var(--accent);
        }

        .btn-outline:active {
            transform: translateY(1px);
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            padding: 4px 0;
            border-bottom: 1px solid transparent;
            transition: all var(--transition);
        }

        .btn-text:hover {
            border-bottom-color: var(--accent);
            color: var(--accent);
        }

        .btn-text .arrow {
            font-size: 18px;
            transition: transform var(--transition);
        }

        .btn-text:hover .arrow {
            transform: translateX(4px);
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 18, 32, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(232, 169, 61, 0.10);
            transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(11, 18, 32, 0.96);
            border-bottom-color: var(--border-dark);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 32px;
        }

        .logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.06em;
            color: var(--text-dark);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .logo::before {
            content: '';
            display: inline-block;
            width: 10px;
            height: 10px;
            background-color: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 16px rgba(232, 169, 61, 0.6);
        }

        .logo:hover {
            color: var(--accent);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 26px;
        }

        .main-nav a {
            color: var(--text-muted-dark);
            font-size: 15px;
            font-weight: 500;
            white-space: nowrap;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: all var(--transition);
        }

        .main-nav a:hover {
            color: var(--text-dark);
        }

        .main-nav a.active {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }

        .header-cta {
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 700;
            background-color: var(--accent);
            color: #1A2233;
            border-radius: var(--radius-btn);
            white-space: nowrap;
            transition: all var(--transition);
        }

        .header-cta:hover {
            background-color: var(--accent-hover);
            color: #1A2233;
        }

        .header-cta:active {
            transform: translateY(1px);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            background: none;
        }

        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--text-dark);
            transition: all var(--transition);
        }

        /* Breadcrumb */
        .breadcrumb {
            padding: 100px 0 0;
            background-color: var(--primary);
            color: var(--text-muted-dark);
            font-size: 14px;
        }

        .breadcrumb .container {
            padding-top: 12px;
            padding-bottom: 12px;
        }

        .breadcrumb ol {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }

        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb li:not(:last-child)::after {
            content: '/';
            color: var(--text-muted-dark);
            opacity: 0.5;
        }

        .breadcrumb a {
            color: var(--text-muted-dark);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb li:last-child {
            color: var(--accent);
        }

        /* Category Hero */
        .category-hero {
            padding: 48px 0 64px;
            background-color: var(--primary);
            color: var(--text-dark);
            border-bottom: 1px solid var(--border-dark);
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 60%;
            height: 180%;
            background: radial-gradient(ellipse, rgba(232, 169, 61, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 1;
        }

        .category-hero h1 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.35;
            letter-spacing: 0.02em;
            margin-bottom: 18px;
            color: var(--text-dark);
        }

        .category-hero .hero-desc {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-muted-dark);
            max-width: 680px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* Training Grid Section */
        .training-grid-section {
            padding: 64px 0 80px;
            background-color: var(--primary);
            color: var(--text-dark);
        }

        .training-grid-section .section-tag {
            margin-bottom: 12px;
        }

        .training-grid-section .section-title {
            margin-bottom: 12px;
        }

        .training-grid-section .section-subtitle {
            color: var(--text-muted-dark);
            margin-bottom: 40px;
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .train-card {
            background-color: var(--primary-soft);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-lg);
            overflow: hidden;
            box-shadow: var(--shadow-dark);
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
            display: flex;
            flex-direction: column;
        }

        .train-card:hover {
            transform: translateY(-6px);
            border-color: var(--accent);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
        }

        .train-card .card-cover {
            height: 200px;
            overflow: hidden;
            border-radius: var(--radius-card-lg) var(--radius-card-lg) 0 0;
            position: relative;
            background-color: var(--primary-soft);
            flex-shrink: 0;
        }

        .train-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform var(--transition);
        }

        .train-card:hover .card-cover img {
            transform: scale(1.06);
        }

        .train-card .card-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-card-lg) var(--radius-card-lg) 0 0;
            background: linear-gradient(180deg, transparent 50%, rgba(11, 18, 32, 0.45) 100%);
            pointer-events: none;
        }

        .card-body {
            padding: 22px 24px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 12px;
        }

        .card-tags span {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(232, 169, 61, 0.10);
            border: 1px solid var(--border-dark);
            border-radius: 16px;
            padding: 3px 12px;
            letter-spacing: 0.03em;
            transition: all var(--transition);
        }

        .train-card:hover .card-tags span {
            background: rgba(232, 169, 61, 0.18);
        }

        .card-body h3 {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

        .card-body p {
            font-size: 14px;
            line-height: 1.85;
            color: var(--text-muted-dark);
            margin-bottom: 16px;
            flex: 1;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            transition: all var(--transition);
        }

        .card-link .arrow {
            font-size: 16px;
            transition: transform var(--transition);
        }

        .card-link:hover {
            color: var(--accent-hover);
        }

        .card-link:hover .arrow {
            transform: translateX(4px);
        }

        /* Training Data */
        .training-data {
            padding: 72px 0;
            background-color: var(--bg-light);
            color: var(--text-light);
        }

        .training-data .section-title {
            color: var(--text-light);
        }

        .training-data .section-subtitle {
            color: var(--text-muted-light);
        }

        .data-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .data-block {
            background-color: var(--bg-light-soft);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card-lg);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-light);
            transition: transform var(--transition), border-color var(--transition);
        }

        .data-block:hover {
            transform: translateY(-4px);
            border-color: var(--accent);
        }

        .data-number {
            font-size: 44px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: 0.02em;
        }

        .data-number span {
            color: var(--accent);
            font-size: 24px;
            font-weight: 700;
        }

        .data-label {
            font-size: 14px;
            color: var(--text-muted-light);
            margin-top: 8px;
            line-height: 1.6;
        }

        /* Training Process */
        .training-process {
            padding: 80px 0;
            background-color: var(--primary);
            color: var(--text-dark);
        }

        .training-process .section-title {
            margin-bottom: 40px;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .process-step {
            position: relative;
            padding: 28px 24px;
            background-color: var(--primary-soft);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-lg);
            transition: border-color var(--transition), transform var(--transition);
        }

        .process-step:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
        }

        .step-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 16px;
            opacity: 0.85;
        }

        .process-step h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-dark);
        }

        .process-step p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-muted-dark);
        }

        /* FAQ */
        .faq-section {
            padding: 80px 0;
            background-color: var(--bg-light);
            color: var(--text-light);
        }

        .faq-section .section-title {
            color: var(--text-light);
            margin-bottom: 32px;
        }

        .faq-list {
            max-width: 800px;
        }

        .faq-item {
            margin-bottom: 14px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card-sm);
            background-color: var(--bg-light-soft);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item[open] {
            border-left: 3px solid var(--accent);
            background-color: rgba(232, 169, 61, 0.06);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            list-style: none;
            transition: color var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent);
            transition: transform var(--transition);
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
        }

        .faq-item summary:hover {
            color: var(--accent);
        }

        .faq-answer {
            padding: 0 22px 18px;
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-muted-light);
        }

        /* Pagination */
        .pagination-section {
            padding: 40px 0 64px;
            background-color: var(--primary);
            color: var(--text-dark);
        }

        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 14px;
            border-radius: 50%;
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .pagination a {
            color: var(--text-muted-dark);
            border-color: var(--border-dark);
        }

        .pagination a:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .pagination .current {
            background-color: var(--accent);
            color: #1A2233;
            font-weight: 700;
            border-color: var(--accent);
        }

        .pagination .pager-text {
            min-width: auto;
            padding: 0 16px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            color: var(--text-muted-dark);
            border: 1px solid var(--border-dark);
        }

        .pagination .pager-text:hover {
            color: var(--accent);
            border-color: var(--accent);
        }

        /* Footer */
        .site-footer {
            background-color: #080D18;
            color: var(--text-muted-dark);
            padding: 56px 0 0;
            border-top: 1px solid var(--border-dark);
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 1.4fr 2fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand .logo {
            font-size: 24px;
            margin-bottom: 14px;
            color: var(--text-dark);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.9;
            max-width: 420px;
        }

        .footer-links {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .footer-link-group h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 14px;
        }

        .footer-link-group a {
            display: block;
            font-size: 14px;
            color: var(--text-muted-dark);
            padding: 5px 0;
            transition: all var(--transition);
        }

        .footer-link-group a:hover {
            color: var(--accent);
            text-decoration: underline;
        }

        .footer-bottom {
            border-top: 1px solid rgba(232, 169, 61, 0.10);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
        }

        .footer-bottom span,
        .footer-bottom a {
            color: var(--text-muted-dark);
        }

        .footer-bottom a:hover {
            color: var(--accent);
            text-decoration: underline;
        }

        .footer-bottom .sep {
            margin: 0 8px;
            opacity: 0.5;
        }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: rgba(11, 18, 32, 0.98);
            border-bottom: 1px solid var(--border-dark);
            padding: 20px 24px;
            z-index: 999;
            flex-direction: column;
            gap: 6px;
        }

        .mobile-nav a {
            padding: 12px 4px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-muted-dark);
            border-left: 3px solid transparent;
            transition: all var(--transition);
        }

        .mobile-nav a:hover {
            color: var(--text-dark);
        }

        .mobile-nav a.active {
            color: var(--accent);
            border-left-color: var(--accent);
        }

        .mobile-nav .header-cta {
            margin-top: 12px;
            text-align: center;
            width: 100%;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .data-row {
                grid-template-columns: repeat(2, 1fr);
            }

            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-links {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }

            .header-cta {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .mobile-nav.active {
                display: flex;
            }

            .category-hero {
                padding: 36px 0 48px;
            }

            .category-hero h1 {
                font-size: 32px;
            }

            .card-grid {
                grid-template-columns: 1fr;
            }

            .section {
                padding: 56px 0;
            }

            .section-title {
                font-size: 26px;
            }

            .data-row {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .process-steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .footer-links {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .pagination {
                flex-wrap: wrap;
            }

            .pagination a,
            .pagination span {
                min-width: 36px;
                height: 36px;
                font-size: 13px;
                padding: 0 10px;
            }

            .train-card .card-cover {
                height: 180px;
            }

            .breadcrumb {
                padding: 88px 0 0;
            }
        }

        @media (max-width: 480px) {
            .category-hero h1 {
                font-size: 28px;
            }

            .hero-actions {
                flex-direction: column;
                gap: 12px;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .train-card .card-cover {
                height: 160px;
            }

            .card-body {
                padding: 18px 18px 20px;
            }

            .data-number {
                font-size: 36px;
            }

            .breadcrumb li {
                font-size: 13px;
            }

            .section-title {
                font-size: 24px;
            }

            .pagination .pager-text {
                padding: 0 10px;
                font-size: 12px;
            }
        }

.training-cta {
                padding: 70px 0;
                background: linear-gradient(135deg, #0B1220 0%, #111B30 60%, #1A1F36 100%);
                color: var(--text-dark);
            }
            .training-cta .cta-panel {
                display: flex;
                align-items: center;
                justify-content: space-between;
                gap: 32px;
                background: rgba(232, 169, 61, 0.06);
                border: 1px solid var(--border-dark);
                border-radius: var(--radius-card-lg);
                padding: 36px 40px;
                flex-wrap: wrap;
            }
            .training-cta h2 {
                font-size: 24px;
                font-weight: 700;
                margin-bottom: 10px;
                color: var(--text-dark);
            }
            .training-cta p {
                font-size: 15px;
                line-height: 1.9;
                color: var(--text-muted-dark);
                max-width: 600px;
                margin: 0;
            }
            @media (max-width: 600px) {
                .training-cta .cta-panel {
                    flex-direction: column;
                    align-items: flex-start;
                    padding: 24px 20px;
                }
                .training-cta .btn {
                    width: 100%;
                }
            }

/* roulang page: category4 */
:root {
            --primary: #0B1220;
            --primary-soft: #111B30;
            --accent: #E8A93D;
            --accent-hover: #C7912E;
            --bg-light: #F5F0E6;
            --bg-light-soft: #EDE8DC;
            --text-dark: #E8ECF1;
            --text-light: #1A2233;
            --text-muted-dark: #8B94A7;
            --text-muted-light: #6B7280;
            --border-dark: rgba(232, 169, 61, 0.18);
            --border-light: rgba(26, 34, 51, 0.12);
            --radius-card-lg: 12px;
            --radius-card-sm: 8px;
            --radius-btn: 6px;
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-light: 0 4px 16px rgba(11, 18, 32, 0.08);
            --container-max: 1200px;
            --transition: 0.25s ease;
            --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-light);
            background-color: var(--primary);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card-sm);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
        }

        a:hover {
            color: var(--accent);
        }

        button,
        input,
        textarea {
            font-family: var(--font-sans);
            font-size: 16px;
            color: inherit;
            outline: none;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 90px 0;
        }

        .section-dark {
            background-color: var(--primary);
            color: var(--text-dark);
        }

        .section-light {
            background-color: var(--bg-light);
            color: var(--text-light);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .section-subtitle {
            font-size: 16px;
            font-weight: 400;
            line-height: 1.9;
            margin-bottom: 48px;
            max-width: 720px;
            color: var(--text-muted-dark);
        }

        .section-light .section-subtitle {
            color: var(--text-muted-light);
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(232, 169, 61, 0.12);
            border: 1px solid var(--border-dark);
            border-radius: 20px;
            padding: 4px 14px;
            margin-bottom: 16px;
            letter-spacing: 0.05em;
        }

        .section-light .section-tag {
            background: rgba(232, 169, 61, 0.10);
            border-color: var(--border-light);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 15px;
            letter-spacing: 0.03em;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .btn:focus-visible {
            outline: 2px solid rgba(232, 169, 61, 0.4);
            outline-offset: 2px;
        }

        .btn-primary {
            background-color: var(--accent);
            color: #1A2233;
            border-color: var(--accent);
        }

        .btn-primary:hover {
            background-color: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #1A2233;
        }

        .btn-primary:active {
            transform: translateY(1px);
        }

        .btn-outline {
            background: transparent;
            color: var(--accent);
            border-color: var(--accent);
        }

        .btn-outline:hover {
            background: rgba(232, 169, 61, 0.10);
            color: var(--accent);
        }

        .btn-outline:active {
            transform: translateY(1px);
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            padding: 4px 0;
            border-bottom: 1px solid transparent;
            transition: all var(--transition);
        }

        .btn-text:hover {
            border-bottom-color: var(--accent);
            color: var(--accent);
        }

        .btn-text .arrow {
            font-size: 18px;
            transition: transform var(--transition);
        }

        .btn-text:hover .arrow {
            transform: translateX(4px);
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 18, 32, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(232, 169, 61, 0.10);
            transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(11, 18, 32, 0.96);
            border-bottom-color: var(--border-dark);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.06em;
            color: var(--text-dark);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .logo::before {
            content: '';
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 12px rgba(232, 169, 61, 0.7);
            flex-shrink: 0;
        }

        .logo:hover {
            color: var(--accent);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            flex-wrap: wrap;
        }

        .main-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted-dark);
            position: relative;
            padding: 6px 0;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: var(--text-dark);
        }

        .main-nav a.active {
            color: var(--accent);
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background: var(--accent);
            color: #1A2233;
            font-weight: 700;
            font-size: 14px;
            letter-spacing: 0.03em;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--accent-hover);
            color: #1A2233;
        }

        .nav-cta:active {
            transform: translateY(1px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: transparent;
            border: 1px solid var(--border-dark);
            border-radius: 6px;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            padding: 100px 0 0;
            background: var(--primary);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted-dark);
            padding: 16px 0;
            border-bottom: 1px solid var(--border-dark);
        }

        .breadcrumb a {
            color: var(--text-muted-dark);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .sep {
            color: var(--border-dark);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--accent);
            font-weight: 600;
        }

        /* Hero Banner */
        .page-hero {
            background: var(--primary);
            padding: 50px 0 70px;
            position: relative;
            overflow: hidden;
            background-image: linear-gradient(135deg, rgba(11, 18, 32, 0.92) 0%, rgba(17, 27, 48, 0.85) 100%), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--border-dark);
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            opacity: 0.5;
        }

        .page-hero-inner {
            position: relative;
            z-index: 1;
            max-width: 820px;
        }

        .page-hero h1 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.35;
            color: var(--text-dark);
            margin-bottom: 18px;
            letter-spacing: 0.03em;
        }

        .page-hero .hero-desc {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-muted-dark);
            max-width: 680px;
            margin-bottom: 28px;
        }

        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .hero-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 500;
            color: var(--accent);
            background: rgba(232, 169, 61, 0.10);
            border: 1px solid var(--border-dark);
            border-radius: 20px;
            padding: 5px 14px;
            letter-spacing: 0.04em;
            transition: all var(--transition);
        }

        .hero-tag:hover {
            background: rgba(232, 169, 61, 0.2);
            color: var(--accent);
        }

        /* Guide Layout - 分栏指南式 */
        .guide-layout {
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 48px;
            align-items: start;
        }

        .guide-toc {
            position: sticky;
            top: 100px;
            background: var(--primary-soft);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-dark);
        }

        .guide-toc-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .guide-toc-title::before {
            content: '';
            width: 4px;
            height: 18px;
            background: var(--accent);
            border-radius: 2px;
        }

        .guide-toc-list {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .guide-toc-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted-dark);
            border-radius: var(--radius-card-sm);
            transition: all var(--transition);
            border-left: 2px solid transparent;
        }

        .guide-toc-list a:hover {
            color: var(--accent);
            background: rgba(232, 169, 61, 0.06);
            border-left-color: var(--accent);
        }

        .guide-toc-list a.active {
            color: var(--accent);
            background: rgba(232, 169, 61, 0.08);
            border-left-color: var(--accent);
            font-weight: 600;
        }

        .guide-toc-list a .toc-num {
            font-size: 12px;
            font-weight: 700;
            color: var(--accent);
            min-width: 24px;
            text-align: center;
            background: rgba(232, 169, 61, 0.12);
            border-radius: 4px;
            padding: 2px 6px;
        }

        .guide-content {
            min-width: 0;
        }

        .guide-section {
            margin-bottom: 56px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border-dark);
        }

        .guide-section:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .guide-section h2 {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-dark);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .guide-section h2 .section-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--accent);
            color: #1A2233;
            font-size: 16px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .guide-section p {
            font-size: 16px;
            line-height: 1.95;
            color: var(--text-muted-dark);
            margin-bottom: 16px;
        }

        .guide-section p:last-child {
            margin-bottom: 0;
        }

        .guide-section p strong {
            color: var(--text-dark);
            font-weight: 600;
        }

        .guide-section .inline-img {
            margin: 24px 0;
            border-radius: var(--radius-card-lg);
            overflow: hidden;
            border: 1px solid var(--border-dark);
        }

        .guide-section .inline-img img {
            width: 100%;
            border-radius: var(--radius-card-lg);
            transition: transform var(--transition);
        }

        .guide-section .inline-img:hover img {
            transform: scale(1.02);
        }

        .guide-quote {
            margin: 24px 0;
            padding: 20px 24px;
            background: rgba(232, 169, 61, 0.06);
            border-left: 3px solid var(--accent);
            border-radius: 0 var(--radius-card-sm) var(--radius-card-sm) 0;
            font-size: 15px;
            line-height: 1.85;
            color: var(--text-dark);
            font-style: italic;
        }

        /* Stats Row */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: var(--primary-soft);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-lg);
            padding: 28px 20px;
            text-align: center;
            transition: all var(--transition);
        }

        .stat-card:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
            box-shadow: var(--shadow-dark);
        }

        .stat-num {
            font-size: 44px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        .stat-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted-dark);
            line-height: 1.6;
        }

        /* Related Cards */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--primary-soft);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-lg);
            overflow: hidden;
            transition: all var(--transition);
        }

        .related-card:hover {
            border-color: var(--accent);
            transform: translateY(-5px);
            box-shadow: var(--shadow-dark);
        }

        .related-card .card-img {
            height: 180px;
            overflow: hidden;
            background: var(--primary-soft);
            position: relative;
        }

        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform var(--transition);
        }

        .related-card:hover .card-img img {
            transform: scale(1.05);
        }

        .related-card .card-body {
            padding: 20px;
        }

        .related-card .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(232, 169, 61, 0.10);
            border: 1px solid var(--border-dark);
            border-radius: 16px;
            padding: 3px 10px;
            margin-bottom: 10px;
            letter-spacing: 0.04em;
        }

        .related-card h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.5;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .related-card p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-muted-dark);
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 820px;
        }

        .faq-item {
            background: var(--primary-soft);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-sm);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(232, 169, 61, 0.35);
        }

        .faq-item details {
            cursor: pointer;
        }

        .faq-item summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            transition: all var(--transition);
            gap: 16px;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-icon {
            font-size: 22px;
            font-weight: 300;
            color: var(--accent);
            flex-shrink: 0;
            transition: transform var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
        }

        .faq-item[open] summary {
            border-left: 3px solid var(--accent);
            padding-left: 19px;
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 22px 20px;
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-muted-dark);
            border-left: 3px solid var(--accent);
            margin-left: 0;
        }

        /* CTA */
        .cta-panel {
            background: var(--primary-soft);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-lg);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--shadow-dark);
            background-image: radial-gradient(ellipse at top, rgba(232, 169, 61, 0.06) 0%, transparent 60%);
        }

        .cta-panel h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .cta-panel p {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-muted-dark);
            max-width: 560px;
            margin: 0 auto 24px;
        }

        .cta-btns {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 20px 0;
            flex-wrap: wrap;
        }

        .pagination a,
        .pagination .page-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            border-radius: 50%;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted-dark);
            border: 1px solid var(--border-dark);
            transition: all var(--transition);
        }

        .pagination a:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .pagination .page-num.current {
            background: var(--accent);
            color: #1A2233;
            border-color: var(--accent);
            font-weight: 700;
        }

        .pagination .page-prev,
        .pagination .page-next {
            border-radius: 20px;
            padding: 0 16px;
            gap: 4px;
            font-size: 13px;
        }

        /* Footer */
        .site-footer {
            background: #080D17;
            color: var(--text-muted-dark);
            padding: 60px 0 0;
            border-top: 1px solid rgba(232, 169, 61, 0.10);
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand .logo {
            font-size: 20px;
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.85;
            color: var(--text-muted-dark);
            max-width: 340px;
        }

        .footer-link-group h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }

        .footer-link-group a {
            display: block;
            font-size: 14px;
            color: var(--text-muted-dark);
            padding: 6px 0;
            transition: all var(--transition);
        }

        .footer-link-group a:hover {
            color: var(--accent);
            text-decoration: underline;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            border-top: 1px solid var(--border-dark);
            font-size: 13px;
            color: var(--text-muted-dark);
        }

        .footer-bottom a {
            color: var(--text-muted-dark);
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--accent);
            text-decoration: underline;
        }

        .footer-bottom .sep {
            margin: 0 8px;
            opacity: 0.5;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .guide-layout {
                grid-template-columns: 220px 1fr;
                gap: 32px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(11, 18, 32, 0.98);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-dark);
                box-shadow: var(--shadow-dark);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                width: 100%;
                padding: 12px 0;
                font-size: 16px;
                border-bottom: 1px solid rgba(232, 169, 61, 0.08);
            }
            .main-nav a:last-child {
                border-bottom: none;
            }
            .main-nav a.active::after {
                display: none;
            }
            .main-nav a.active {
                border-left: 3px solid var(--accent);
                padding-left: 12px;
                background: rgba(232, 169, 61, 0.06);
            }
            .nav-cta {
                display: none;
            }
            .breadcrumb-bar {
                padding-top: 80px;
            }
            .page-hero {
                padding: 36px 0 50px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .guide-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .guide-toc {
                position: static;
                padding: 20px 18px;
            }
            .guide-toc-list {
                flex-direction: row;
                flex-wrap: wrap;
                gap: 8px;
            }
            .guide-toc-list a {
                padding: 8px 14px;
                font-size: 13px;
                border-left: none;
                border: 1px solid var(--border-dark);
                border-radius: 20px;
            }
            .guide-toc-list a.active {
                border-left: 1px solid var(--accent);
                background: rgba(232, 169, 61, 0.08);
            }
            .guide-toc-list a .toc-num {
                display: none;
            }
            .guide-section h2 {
                font-size: 22px;
                flex-wrap: wrap;
            }
            .guide-section p {
                font-size: 15px;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .cta-panel {
                padding: 32px 24px;
            }
            .cta-panel h2 {
                font-size: 24px;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 26px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 26px;
                line-height: 1.45;
            }
            .hero-desc {
                font-size: 14px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .stat-num {
                font-size: 36px;
            }
            .guide-toc-list {
                flex-direction: column;
            }
            .guide-toc-list a {
                width: 100%;
                border-radius: var(--radius-card-sm);
            }
            .guide-section h2 {
                font-size: 20px;
            }
            .guide-section h2 .section-num {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            .related-card .card-img {
                height: 160px;
            }
            .cta-btns {
                flex-direction: column;
            }
            .cta-btns .btn {
                width: 100%;
            }
            .pagination a,
            .pagination .page-num {
                min-width: 36px;
                height: 36px;
                font-size: 13px;
            }
            .pagination .page-prev,
            .pagination .page-next {
                padding: 0 10px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-brand {
                grid-column: auto;
            }
        }

/* roulang page: category5 */
:root {
            --primary: #0B1220;
            --primary-soft: #111B30;
            --accent: #E8A93D;
            --accent-hover: #C7912E;
            --bg-light: #F5F0E6;
            --bg-light-soft: #EDE8DC;
            --text-dark: #E8ECF1;
            --text-light: #1A2233;
            --text-muted-dark: #8B94A7;
            --text-muted-light: #6B7280;
            --border-dark: rgba(232, 169, 61, 0.18);
            --border-light: rgba(26, 34, 51, 0.12);
            --radius-card-lg: 12px;
            --radius-card-sm: 8px;
            --radius-btn: 6px;
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-light: 0 4px 16px rgba(11, 18, 32, 0.08);
            --container-max: 1200px;
            --transition: 0.25s ease;
            --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-light);
            background-color: var(--primary);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card-sm);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
        }
        a:hover {
            color: var(--accent);
        }

        button,
        input,
        textarea {
            font-family: var(--font-sans);
            font-size: 16px;
            color: inherit;
            outline: none;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 100px 0;
        }
        .section-dark {
            background-color: var(--primary);
            color: var(--text-dark);
        }
        .section-light {
            background-color: var(--bg-light);
            color: var(--text-light);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .section-subtitle {
            font-size: 16px;
            font-weight: 400;
            line-height: 1.9;
            margin-bottom: 48px;
            max-width: 720px;
            color: var(--text-muted-dark);
        }
        .section-light .section-subtitle {
            color: var(--text-muted-light);
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(232, 169, 61, 0.12);
            border: 1px solid var(--border-dark);
            border-radius: 20px;
            padding: 4px 14px;
            margin-bottom: 16px;
            letter-spacing: 0.05em;
        }
        .section-light .section-tag {
            background: rgba(232, 169, 61, 0.10);
            border-color: var(--border-light);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 15px;
            letter-spacing: 0.03em;
            transition: all var(--transition);
            border: 1px solid transparent;
        }
        .btn:focus-visible {
            outline: 2px solid rgba(232, 169, 61, 0.4);
            outline-offset: 2px;
        }
        .btn-primary {
            background-color: var(--accent);
            color: #1A2233;
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background-color: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #1A2233;
        }
        .btn-primary:active {
            transform: translateY(1px);
        }
        .btn-outline {
            background: transparent;
            color: var(--accent);
            border-color: var(--accent);
        }
        .btn-outline:hover {
            background: rgba(232, 169, 61, 0.10);
            color: var(--accent);
        }
        .btn-outline:active {
            transform: translateY(1px);
        }
        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            padding: 4px 0;
            border-bottom: 1px solid transparent;
            transition: all var(--transition);
        }
        .btn-text:hover {
            border-bottom-color: var(--accent);
            color: var(--accent);
        }
        .btn-text .arrow {
            font-size: 18px;
            transition: transform var(--transition);
        }
        .btn-text:hover .arrow {
            transform: translateX(4px);
        }

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 18, 32, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(232, 169, 61, 0.10);
            transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(11, 18, 32, 0.96);
            border-bottom-color: var(--border-dark);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: 0.04em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo::before {
            content: '';
            display: inline-block;
            width: 12px;
            height: 12px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 8px 2px rgba(232, 169, 61, 0.5);
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--accent);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .main-nav a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted-dark);
            padding: 8px 12px;
            border-radius: 4px;
            position: relative;
            letter-spacing: 0.02em;
            white-space: nowrap;
            transition: color var(--transition);
        }
        .main-nav a:hover {
            color: var(--text-dark);
        }
        .main-nav a.active {
            color: var(--accent);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 12px;
            right: 12px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-cta {
            background-color: var(--accent);
            color: #1A2233;
            font-weight: 700;
            font-size: 14px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            white-space: nowrap;
            transition: all var(--transition);
            border: 1px solid var(--accent);
        }
        .nav-cta:hover {
            background-color: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #1A2233;
        }
        .nav-cta:active {
            transform: translateY(1px);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
            z-index: 1100;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-dark);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .hamburger[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }
        .hamburger[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Breadcrumb */
        .breadcrumb {
            padding-top: 100px;
            background-color: var(--primary);
            border-bottom: 1px solid var(--border-dark);
        }
        .breadcrumb-inner {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted-dark);
            padding: 16px 0;
            flex-wrap: wrap;
        }
        .breadcrumb-inner a {
            color: var(--text-muted-dark);
        }
        .breadcrumb-inner a:hover {
            color: var(--accent);
        }
        .breadcrumb-inner .sep {
            color: rgba(232, 169, 61, 0.4);
        }
        .breadcrumb-inner .current {
            color: var(--accent);
            font-weight: 600;
        }

        /* Category Hero */
        .cat-hero {
            background: var(--primary);
            background-image: linear-gradient(135deg, rgba(11, 18, 32, 0.92) 0%, rgba(17, 27, 48, 0.88) 50%, rgba(11, 18, 32, 0.94) 100%), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            color: var(--text-dark);
            padding: 60px 0 70px;
            border-bottom: 1px solid var(--border-dark);
            position: relative;
            overflow: hidden;
        }
        .cat-hero::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 40%;
            height: 100%;
            background: radial-gradient(circle at center, rgba(232, 169, 61, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .cat-hero-inner {
            position: relative;
            z-index: 1;
            max-width: 780px;
        }
        .cat-hero h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.35;
            letter-spacing: 0.03em;
            margin-bottom: 20px;
        }
        .cat-hero p {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-muted-dark);
            max-width: 640px;
        }
        .cat-hero .hero-meta {
            display: flex;
            gap: 24px;
            margin-top: 28px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--text-muted-dark);
        }
        .cat-hero .hero-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .cat-hero .hero-meta .dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
        }

        /* Alternating Article Cards */
        .data-articles {
            background-color: var(--bg-light);
            color: var(--text-light);
        }
        .article-alt-card {
            display: flex;
            gap: 48px;
            align-items: stretch;
            margin-bottom: 56px;
            background: #fff;
            border-radius: var(--radius-card-lg);
            overflow: hidden;
            box-shadow: var(--shadow-light);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .article-alt-card:hover {
            box-shadow: 0 8px 32px rgba(11, 18, 32, 0.12);
            border-color: var(--accent);
            transform: translateY(-4px);
        }
        .article-alt-card.reverse {
            flex-direction: row-reverse;
        }
        .article-alt-img {
            flex: 0 0 42%;
            min-height: 300px;
            position: relative;
            overflow: hidden;
            background: var(--bg-light-soft);
        }
        .article-alt-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.4s ease;
        }
        .article-alt-card:hover .article-alt-img img {
            transform: scale(1.04);
        }
        .article-alt-img .img-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(11, 18, 32, 0.85);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            border: 1px solid var(--border-dark);
            letter-spacing: 0.04em;
        }
        .article-alt-content {
            flex: 1;
            padding: 40px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .article-alt-content .date {
            font-size: 13px;
            color: var(--text-muted-light);
            letter-spacing: 0.06em;
            margin-bottom: 12px;
        }
        .article-alt-content h2 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 16px;
            color: var(--text-light);
            letter-spacing: 0.02em;
        }
        .article-alt-content p {
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-muted-light);
            margin-bottom: 20px;
        }
        .article-alt-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }
        .article-alt-tags .tag {
            font-size: 12px;
            color: var(--accent);
            background: rgba(232, 169, 61, 0.08);
            border: 1px solid var(--border-dark);
            border-radius: 4px;
            padding: 4px 10px;
            font-weight: 500;
            letter-spacing: 0.03em;
            transition: all var(--transition);
        }
        .article-alt-tags .tag:hover {
            background: rgba(232, 169, 61, 0.18);
        }

        /* Data Stats Highlight */
        .data-highlight {
            background-color: var(--primary);
            color: var(--text-dark);
            padding: 70px 0;
            border-top: 1px solid var(--border-dark);
            border-bottom: 1px solid var(--border-dark);
        }
        .data-highlight-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .data-highlight-item {
            text-align: center;
            padding: 28px 16px;
            background: var(--primary-soft);
            border-radius: var(--radius-card-sm);
            border: 1px solid var(--border-dark);
            transition: all var(--transition);
        }
        .data-highlight-item:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
        }
        .data-highlight-item .num {
            font-size: 44px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }
        .data-highlight-item .label {
            font-size: 14px;
            color: var(--text-muted-dark);
            line-height: 1.6;
        }

        /* Pagination */
        .pagination-section {
            background-color: var(--bg-light);
            padding: 20px 0 60px;
        }
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .pagination a,
        .pagination span{
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-weight: 700;
    font-size: 14px;
    transition: all var(--transition);
    border: 1px solid transparent;
}
.pagination a.page-link {
    background: #fff;
    color: var(--text-light);
    border-color: var(--border-light);
}
.pagination a.page-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(232, 169, 61, 0.08);
}
.pagination span.current {
    background: var(--accent);
    color: #1A2233;
    border-color: var(--accent);
}
.pagination .prev-arrow,
.pagination .next-arrow {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 0 14px;
    height: 40px;
    border-radius: 20px;
    font-weight: 600;
    color: var(--text-muted-light);
    background: #fff;
    border: 1px solid var(--border-light);
    transition: all var(--transition);
}
.pagination .prev-arrow:hover,
.pagination .next-arrow:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(232, 169, 61, 0.08);
}
.pagination .ellipsis {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted-light);
    font-weight: 600;
}

/* Data Dimension Section */
.data-dimension-section {
    background: #fff;
    padding: 80px 0;
}
.dimension-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.dimension-item {
    background: var(--bg-light-soft);
    border-radius: var(--radius-card-sm);
    padding: 28px 20px;
    border: 1px solid var(--border-light);
    transition: all var(--transition);
    text-align: left;
}
.dimension-item:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-light);
    transform: translateY(-3px);
}
.dimension-item .dim-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(232, 169, 61, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--accent);
    margin-bottom: 14px;
}
.dimension-item h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 8px;
    letter-spacing: 0.02em;
}
.dimension-item p {
    font-size: 14px;
    line-height: 1.85;
    color: var(--text-muted-light);
}

/* FAQ Section */
.faq-section {
    background: var(--bg-light);
    padding: 90px 0;
}
.faq-list {
    max-width: 820px;
    margin: 0 auto;
}
.faq-item {
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-card-sm);
    margin-bottom: 14px;
    overflow: hidden;
    transition: all var(--transition);
}
.faq-item.active {
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(11, 18, 32, 0.06);
}
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 20px 22px;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-light);
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: all var(--transition);
    background: none;
    border: none;
    text-align: left;
    gap: 16px;
}
.faq-question:hover {
    color: var(--accent);
}
.faq-question .icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(232, 169, 61, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
    transition: transform var(--transition);
}
.faq-item.active .faq-question .icon {
    transform: rotate(45deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.25s ease;
    padding: 0 22px;
    color: var(--text-muted-light);
    font-size: 15px;
    line-height: 1.9;
    border-left: 3px solid transparent;
}
.faq-item.active .faq-answer {
    max-height: 260px;
    padding: 0 22px 20px;
    border-left-color: var(--accent);
}
.faq-answer p {
    padding-left: 12px;
}

/* CTA Section */
.cta-section {
    background: var(--primary);
    background-image: linear-gradient(120deg, rgba(11, 18, 32, 0.95) 0%, rgba(17, 27, 48, 0.9) 55%, rgba(11, 18, 32, 0.95) 100%), url('/assets/images/backpic/back-3.webp');
    background-size: cover;
    background-position: center;
    color: var(--text-dark);
    padding: 90px 0;
}
.cta-box {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
    padding: 48px 32px;
    background: rgba(17, 27, 48, 0.62);
    border-radius: var(--radius-card-lg);
    border: 1px solid var(--border-dark);
    box-shadow: var(--shadow-dark);
}
.cta-box h2 {
    font-size: 30px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 16px;
    letter-spacing: 0.03em;
}
.cta-box p {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-muted-dark);
    margin-bottom: 32px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}
.cta-box .btn-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Site Footer */
.site-footer {
    background: #060C18;
    color: var(--text-muted-dark);
    padding: 70px 0 28px;
    border-top: 1px solid var(--border-dark);
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 48px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}
.footer-brand {
    flex: 1 1 280px;
    max-width: 380px;
}
.footer-brand .logo {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.footer-brand .logo::before {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 8px 2px rgba(232, 169, 61, 0.4);
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.9;
    color: var(--text-muted-dark);
}
.footer-links {
    flex: 1 1 520px;
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}
.footer-link-group {
    flex: 1 1 140px;
}
.footer-link-group h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
    letter-spacing: 0.04em;
}
.footer-link-group a {
    display: block;
    font-size: 14px;
    color: var(--text-muted-dark);
    padding: 6px 0;
    transition: all var(--transition);
}
.footer-link-group a:hover {
    color: var(--accent);
    text-decoration: underline;
}
.footer-bottom {
    border-top: 1px solid rgba(232, 169, 61, 0.12);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted-dark);
}
.footer-bottom .sep {
    margin: 0 10px;
    color: rgba(232, 169, 61, 0.25);
}
.footer-bottom a {
    color: var(--text-muted-dark);
}
.footer-bottom a:hover {
    color: var(--accent);
    text-decoration: underline;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--accent);
    color: #1A2233;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 700;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    border: 1px solid var(--accent);
    z-index: 900;
    transition: all var(--transition);
    opacity: 0;
    pointer-events: none;
}
.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}
.back-to-top:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-3px);
}

/* Responsive */
@media (max-width: 1024px) {
    .main-nav {
        gap: 4px;
    }
    .main-nav a {
        padding: 8px 10px;
        font-size: 13px;
    }
    .cat-hero h1 {
        font-size: 36px;
    }
    .article-alt-card {
        gap: 32px;
    }
    .article-alt-content {
        padding: 28px 24px;
    }
    .data-highlight-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .dimension-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 768px) {
    .header-inner {
        height: 64px;
    }
    .main-nav {
        display: none;
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(11, 18, 32, 0.98);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding: 40px 24px;
        gap: 12px;
        overflow-y: auto;
        z-index: 999;
    }
    .main-nav.open {
        display: flex;
    }
    .main-nav a {
        font-size: 17px;
        padding: 14px 0;
        width: 100%;
        text-align: center;
        color: var(--text-dark);
    }
    .main-nav a.active::after {
        left: 30%;
        right: 30%;
    }
    .nav-cta {
        width: 100%;
        margin-top: 12px;
        text-align: center;
        justify-content: center;
    }
    .hamburger {
        display: flex;
    }
    .section {
        padding: 60px 0;
    }
    .section-title {
        font-size: 26px;
    }
    .cat-hero {
        padding: 48px 0 56px;
    }
    .cat-hero h1 {
        font-size: 32px;
    }
    .cat-hero p {
        font-size: 15px;
    }
    .article-alt-card,
    .article-alt-card.reverse {
        flex-direction: column;
    }
    .article-alt-img {
        flex: none;
        min-height: 220px;
        width: 100%;
    }
    .article-alt-content {
        padding: 24px 20px;
    }
    .article-alt-content h2 {
        font-size: 20px;
    }
    .footer-inner {
        flex-direction: column;
        gap: 32px;
    }
    .footer-links {
        flex-direction: column;
        gap: 24px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .footer-bottom .sep {
        margin: 0 6px;
    }
    .cta-box {
        padding: 36px 20px;
    }
    .cta-box h2 {
        font-size: 24px;
    }
    .pagination {
        gap: 6px;
    }
    .pagination a,
    .pagination span,
    .pagination a.page-link,
    .pagination span.current {
        width: 36px;
        height: 36px;
        font-size: 13px;
    }
    .pagination .prev-arrow,
    .pagination .next-arrow {
        height: 36px;
        padding: 0 10px;
        font-size: 13px;
    }
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
        font-size: 18px;
    }
}
@media (max-width: 520px) {
    .cat-hero h1 {
        font-size: 28px;
    }
    .section-title {
        font-size: 22px;
    }
    .cat-hero .hero-meta {
        flex-direction: column;
        gap: 8px;
    }
    .data-highlight-item .num {
        font-size: 36px;
    }
    .data-highlight-grid {
        grid-template-columns: 1fr;
    }
    .dimension-grid {
        grid-template-columns: 1fr;
    }
    .article-alt-content h2 {
        font-size: 18px;
    }
    .faq-question {
        padding: 16px 14px;
        font-size: 15px;
    }
    .faq-answer {
        font-size: 14px;
    }
    .btn {
        padding: 11px 20px;
        font-size: 14px;
    }
    .cta-box h2 {
        font-size: 20px;
    }
    .cta-box p {
        font-size: 14px;
    }
    .pagination a,
    .pagination span,
    .pagination a.page-link,
    .pagination span.current {
        width: 32px;
        height: 32px;
        font-size: 12px;
    }
    .pagination .prev-arrow,
    .pagination .next-arrow {
        height: 32px;
        padding: 0 8px;
        font-size: 12px;
    }
    .breadcrumb-inner {
        font-size: 12px;
    }
}

/* roulang page: category3 */
:root {
--primary: #0B1220;
--primary-soft: #111B30;
--accent: #E8A93D;
--accent-hover: #C7912E;
--bg-light: #F5F0E6;
--bg-light-soft: #EDE8DC;
--text-dark: #E8ECF1;
--text-light: #1A2233;
--text-muted-dark: #8B94A7;
--text-muted-light: #6B7280;
--border-dark: rgba(232, 169, 61, 0.18);
--border-light: rgba(26, 34, 51, 0.12);
--radius-card-lg: 12px;
--radius-card-sm: 8px;
--radius-btn: 6px;
--shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
--shadow-light: 0 4px 16px rgba(11, 18, 32, 0.08);
--container-max: 1200px;
--transition: 0.25s ease;
--font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* {
margin: 0;
padding: 0;
box-sizing: border-box;
}

html {
scroll-behavior: smooth;
-webkit-text-size-adjust: 100%;
}

body {
font-family: var(--font-sans);
font-size: 16px;
line-height: 1.85;
color: var(--text-light);
background-color: var(--primary);
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}

img {
max-width: 100%;
height: auto;
display: block;
border-radius: var(--radius-card-sm);
}

a {
color: inherit;
text-decoration: none;
transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
}

a:hover {
color: var(--accent);
}

button,
input,
textarea {
font-family: var(--font-sans);
font-size: 16px;
color: inherit;
outline: none;
}

button {
cursor: pointer;
border: none;
background: none;
}

.container {
max-width: var(--container-max);
margin: 0 auto;
padding: 0 24px;
}

.section {
padding: 90px 0;
}

.section-dark {
background-color: var(--primary);
color: var(--text-dark);
}

.section-light {
background-color: var(--bg-light);
color: var(--text-light);
}

.section-title {
font-size: 32px;
font-weight: 700;
line-height: 1.4;
margin-bottom: 16px;
letter-spacing: 0.02em;
}

.section-subtitle {
font-size: 16px;
font-weight: 400;
line-height: 1.9;
margin-bottom: 48px;
max-width: 720px;
color: var(--text-muted-dark);
}

.section-light .section-subtitle {
color: var(--text-muted-light);
}

.section-tag {
display: inline-block;
font-size: 13px;
font-weight: 600;
color: var(--accent);
background: rgba(232, 169, 61, 0.12);
border: 1px solid var(--border-dark);
border-radius: 20px;
padding: 4px 14px;
margin-bottom: 16px;
letter-spacing: 0.05em;
}

.section-light .section-tag {
background: rgba(232, 169, 61, 0.10);
border-color: var(--border-light);
}

.btn {
display: inline-flex;
align-items: center;
justify-content: center;
gap: 8px;
padding: 13px 28px;
border-radius: var(--radius-btn);
font-weight: 700;
font-size: 15px;
letter-spacing: 0.03em;
transition: all var(--transition);
border: 1px solid transparent;
}

.btn:focus-visible {
outline: 2px solid rgba(232, 169, 61, 0.4);
outline-offset: 2px;
}

.btn-primary {
background-color: var(--accent);
color: #1A2233;
border-color: var(--accent);
}

.btn-primary:hover {
background-color: var(--accent-hover);
border-color: var(--accent-hover);
color: #1A2233;
}

.btn-primary:active {
transform: translateY(1px);
}

.btn-outline {
background: transparent;
color: var(--accent);
border-color: var(--accent);
}

.btn-outline:hover {
background: rgba(232, 169, 61, 0.10);
color: var(--accent);
}

.btn-outline:active {
transform: translateY(1px);
}

.btn-text {
display: inline-flex;
align-items: center;
gap: 6px;
color: var(--accent);
font-weight: 600;
font-size: 15px;
padding: 4px 0;
border-bottom: 1px solid transparent;
transition: all var(--transition);
}

.btn-text:hover {
border-bottom-color: var(--accent);
color: var(--accent);
}

.btn-text .arrow {
font-size: 18px;
transition: transform var(--transition);
}

.btn-text:hover .arrow {
transform: translateX(4px);
}

.site-header {
position: fixed;
top: 0;
left: 0;
right: 0;
z-index: 1000;
background: rgba(11, 18, 32, 0.88);
backdrop-filter: blur(16px);
-webkit-backdrop-filter: blur(16px);
border-bottom: 1px solid rgba(232, 169, 61, 0.10);
transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
background: rgba(11, 18, 32, 0.96);
border-bottom-color: var(--border-dark);
box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.header-inner {
display: flex;
align-items: center;
justify-content: space-between;
height: 72px;
gap: 24px;
}

.logo {
display: inline-flex;
align-items: center;
font-size: 22px;
font-weight: 800;
color: var(--text-dark);
letter-spacing: 0.06em;
white-space: nowrap;
position: relative;
}

.logo::after {
content: '';
display: inline-block;
width: 6px;
height: 6px;
border-radius: 50%;
background: var(--accent);
margin-left: 9px;
box-shadow: 0 0 12px rgba(232, 169, 61, 0.9);
flex-shrink: 0;
}

.logo:hover {
color: var(--accent);
}

.main-nav {
display: flex;
align-items: center;
gap: 26px;
flex-wrap: nowrap;
}

.main-nav a {
font-size: 14.5px;
font-weight: 500;
color: var(--text-muted-dark);
padding: 6px 0;
border-bottom: 2px solid transparent;
transition: color var(--transition), border-color var(--transition);
white-space: nowrap;
}

.main-nav a:hover {
color: var(--text-dark);
}

.main-nav a.active {
color: var(--accent);
border-bottom-color: var(--accent);
font-weight: 700;
}

.nav-cta {
flex-shrink: 0;
padding: 10px 22px;
font-size: 14px;
}

.menu-toggle {
display: none;
flex-direction: column;
justify-content: center;
gap: 6px;
width: 42px;
height: 42px;
border: 1px solid var(--border-dark);
border-radius: var(--radius-btn);
background: rgba(232, 169, 61, 0.06);
transition: all var(--transition);
padding: 0 10px;
}

.menu-toggle span {
display: block;
height: 2px;
background: var(--accent);
border-radius: 2px;
transition: all var(--transition);
}

.menu-toggle:hover {
background: rgba(232, 169, 61, 0.14);
}

@media (max-width: 1024px) {
.main-nav a {
font-size: 13.5px;
}
.main-nav {
gap: 16px;
}
.nav-cta {
padding: 8px 16px;
font-size: 13px;
}
}

@media (max-width: 768px) {
.menu-toggle {
display: flex;
}
.main-nav {
position: absolute;
top: 72px;
left: 0;
right: 0;
flex-direction: column;
align-items: stretch;
gap: 0;
background: rgba(11, 18, 32, 0.98);
backdrop-filter: blur(16px);
border-bottom: 1px solid var(--border-dark);
max-height: 0;
overflow: hidden;
transition: max-height 0.35s ease;
}
.main-nav.open {
max-height: 500px;
}
.main-nav a {
padding: 16px 24px;
border-bottom: 1px solid rgba(232, 169, 61, 0.08);
font-size: 15px;
border-left: 3px solid transparent;
}
.main-nav a.active {
border-left-color: var(--accent);
border-bottom-color: rgba(232, 169, 61, 0.08);
}
.nav-cta {
margin: 12px 24px 20px;
width: calc(100% - 48px);
}
.header-inner {
height: 64px;
}
}

.breadcrumb {
padding: 100px 0 0;
background: var(--primary);
}

.breadcrumb-inner {
display: flex;
flex-wrap: wrap;
align-items: center;
gap: 8px;
font-size: 14px;
color: var(--text-muted-dark);
padding: 16px 0;
border-bottom: 1px solid var(--border-dark);
}

.breadcrumb-inner a {
color: var(--text-muted-dark);
}

.breadcrumb-inner a:hover {
color: var(--accent);
}

.breadcrumb-sep {
color: rgba(232, 169, 61, 0.5);
font-size: 12px;
}

.breadcrumb-current {
color: var(--accent);
font-weight: 600;
}

.category-hero {
background: var(--primary);
padding: 64px 0 56px;
position: relative;
overflow: hidden;
}

.category-hero::before {
content: '';
position: absolute;
inset: 0;
background:
radial-gradient(ellipse at 20% 30%, rgba(232, 169, 61, 0.08) 0%, transparent 50%),
radial-gradient(ellipse at 80% 70%, rgba(232, 169, 61, 0.05) 0%, transparent 45%);
pointer-events: none;
}

.category-hero-inner {
position: relative;
display: grid;
grid-template-columns: 1.2fr 0.8fr;
gap: 56px;
align-items: center;
}

.category-hero-content h1 {
font-size: 40px;
font-weight: 800;
line-height: 1.3;
color: var(--text-dark);
margin-bottom: 18px;
letter-spacing: 0.01em;
}

.category-hero-content h1 .highlight {
color: var(--accent);
}

.category-hero-content p.hero-lead {
font-size: 17px;
color: var(--text-muted-dark);
line-height: 1.95;
max-width: 560px;
margin-bottom: 28px;
}

.hero-stats {
display: flex;
flex-wrap: wrap;
gap: 12px;
}

.hero-stat-item {
background: var(--primary-soft);
border: 1px solid var(--border-dark);
border-radius: var(--radius-card-sm);
padding: 12px 20px;
font-size: 13px;
color: var(--text-muted-dark);
display: flex;
align-items: center;
gap: 8px;
}

.hero-stat-item strong {
color: var(--accent);
font-size: 18px;
font-weight: 800;
}

.category-hero-visual {
border-radius: var(--radius-card-lg);
overflow: hidden;
border: 1px solid var(--border-dark);
box-shadow: var(--shadow-dark);
position: relative;
}

.category-hero-visual::after {
content: '';
position: absolute;
inset: 0;
background: linear-gradient(135deg, rgba(232, 169, 61, 0.12) 0%, transparent 60%);
pointer-events: none;
}

.category-hero-visual img {
width: 100%;
height: 320px;
object-fit: cover;
border-radius: var(--radius-card-lg);
}

.timeline-section {
background: var(--bg-light);
padding: 90px 0;
}

.timeline-section .section-title {
color: var(--text-light);
}

.timeline-section .section-subtitle {
color: var(--text-muted-light);
}

.timeline-header-row {
display: flex;
justify-content: space-between;
align-items: flex-end;
flex-wrap: wrap;
gap: 20px;
margin-bottom: 44px;
}

.timeline-filter {
display: flex;
flex-wrap: wrap;
gap: 10px;
}

.timeline-filter button {
padding: 8px 18px;
border-radius: 20px;
font-size: 13px;
font-weight: 600;
color: var(--text-muted-light);
border: 1px solid var(--border-light);
background: transparent;
transition: all var(--transition);
}

.timeline-filter button:hover {
border-color: var(--accent);
color: var(--accent);
}

.timeline-filter button.active {
background: var(--accent);
color: #1A2233;
border-color: var(--accent);
}

.timeline-container {
position: relative;
max-width: 860px;
margin: 0 auto;
padding-left: 40px;
}

.timeline-container::before {
content: '';
position: absolute;
left: 14px;
top: 0;
bottom: 0;
width: 3px;
background: linear-gradient(180deg, var(--accent) 0%, rgba(232, 169, 61, 0.3) 50%, var(--accent) 100%);
border-radius: 4px;
}

.timeline-item {
position: relative;
padding: 0 0 48px 40px;
}

.timeline-item:last-child {
padding-bottom: 8px;
}

.timeline-item::before {
content: '';
position: absolute;
left: -40px;
top: 6px;
width: 15px;
height: 15px;
border-radius: 50%;
background: var(--accent);
border: 3px solid var(--bg-light);
box-shadow: 0 0 0 3px rgba(232, 169, 61, 0.35);
z-index: 1;
}

.timeline-item-date {
display: inline-block;
font-size: 13px;
font-weight: 700;
color: #fff;
background: var(--primary);
padding: 5px 16px;
border-radius: 20px;
letter-spacing: 0.05em;
margin-bottom: 12px;
border: 1px solid var(--border-dark);
}

.timeline-item-card {
background: #fff;
border: 1px solid var(--border-light);
border-radius: var(--radius-card-lg);
padding: 26px 28px;
box-shadow: var(--shadow-light);
transition: all var(--transition);
}

.timeline-item-card:hover {
transform: translateY(-3px);
border-color: var(--accent);
box-shadow: 0 10px 30px rgba(11, 18, 32, 0.12);
}

.timeline-item-card h3 {
font-size: 21px;
font-weight: 700;
color: var(--text-light);
margin-bottom: 10px;
line-height: 1.45;
}

.timeline-item-card p {
font-size: 15px;
color: var(--text-muted-light);
line-height: 1.9;
margin-bottom: 14px;
}

.timeline-item-tags {
display: flex;
flex-wrap: wrap;
gap: 8px;
margin-top: 12px;
}

.timeline-item-tags span {
font-size: 12px;
font-weight: 500;
color: var(--accent-hover);
background: rgba(232, 169, 61, 0.10);
border: 1px solid rgba(232, 169, 61, 0.25);
border-radius: 16px;
padding: 3px 12px;
transition: all var(--transition);
}

.timeline-item-tags span:hover {
background: rgba(232, 169, 61, 0.2);
}

.timeline-item-card .timeline-meta {
display: flex;
flex-wrap: wrap;
gap: 16px;
font-size: 13px;
color: var(--text-muted-light);
margin-bottom: 10px;
}

.timeline-item-card .timeline-meta i {
color: var(--accent);
margin-right: 4px;
font-style: normal;
}

.timeline-image-wrap {
margin: 14px 0 10px;
border-radius: var(--radius-card-sm);
overflow: hidden;
border: 1px solid var(--border-light);
}

.timeline-image-wrap img {
width: 100%;
height: 220px;
object-fit: cover;
border-radius: var(--radius-card-sm);
}

.pagination {
display: flex;
justify-content: center;
align-items: center;
gap: 10px;
margin-top: 56px;
flex-wrap: wrap;
}

.pagination a,
.pagination span {
display: inline-flex;
align-items: center;
justify-content: center;
min-width: 40px;
height: 40px;
padding: 0 12px;
border-radius: 20px;
font-size: 14px;
font-weight: 600;
color: var(--text-muted-light);
border: 1px solid var(--border-light);
transition: all var(--transition);
}

.pagination a:hover {
border-color: var(--accent);
color: var(--accent);
}

.pagination .page-current {
background: var(--accent);
color: #1A2233;
border-color: var(--accent);
font-weight: 700;
}

.pagination .page-prev,
.pagination .page-next {
padding: 0 18px;
}

.timeline-note {
background: var(--primary);
color: var(--text-dark);
padding: 60px 0;
}

.timeline-note-inner {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 48px;
align-items: center;
}

.timeline-note-content h2 {
font-size: 26px;
font-weight: 700;
margin-bottom: 14px;
line-height: 1.4;
}

.timeline-note-content p {
font-size: 15px;
color: var(--text-muted-dark);
line-height: 1.9;
margin-bottom: 18px;
}

.timeline-note-stats {
display: flex;
gap: 24px;
flex-wrap: wrap;
}

.timeline-note-stat {
text-align: center;
background: var(--primary-soft);
border: 1px solid var(--border-dark);
border-radius: var(--radius-card-sm);
padding: 20px 24px;
min-width: 120px;
}

.timeline-note-stat strong {
display: block;
font-size: 36px;
font-weight: 800;
color: var(--accent);
line-height: 1.2;
}

.timeline-note-stat span {
font-size: 13px;
color: var(--text-muted-dark);
}

.site-footer {
background: #080d17;
color: var(--text-muted-dark);
padding: 70px 0 28px;
border-top: 1px solid var(--border-dark);
}

.footer-inner {
display: grid;
grid-template-columns: 1.6fr 1.2fr 1.2fr 1.2fr;
gap: 40px;
margin-bottom: 44px;
}

.footer-brand .logo {
font-size: 20px;
color: var(--text-dark);
margin-bottom: 12px;
}

.footer-brand p {
font-size: 14px;
line-height: 1.85;
color: var(--text-muted-dark);
margin-top: 10px;
max-width: 320px;
}

.footer-link-group h4 {
font-size: 15px;
font-weight: 700;
color: var(--text-dark);
margin-bottom: 16px;
letter-spacing: 0.05em;
}

.footer-link-group a {
display: block;
font-size: 14px;
color: var(--text-muted-dark);
padding: 5px 0;
transition: color var(--transition);
}

.footer-link-group a:hover {
color: var(--accent);
text-decoration: underline;
}

.footer-bottom {
border-top: 1px solid var(--border-dark);
padding-top: 22px;
display: flex;
justify-content: space-between;
flex-wrap: wrap;
gap: 12px;
font-size: 13px;
color: var(--text-muted-dark);
}

.footer-bottom .sep {
margin: 0 10px;
opacity: 0.5;
}

.footer-bottom a {
color: var(--text-muted-dark);
}

.footer-bottom a:hover {
color: var(--accent);
text-decoration: underline;
}

@media (max-width: 1024px) {
.footer-inner {
grid-template-columns: 1fr 1fr;
}
.category-hero-inner {
grid-template-columns: 1fr;
gap: 32px;
}
.category-hero-visual img {
height: 260px;
}
.timeline-note-inner {
grid-template-columns: 1fr;
gap: 32px;
}
}

@media (max-width: 768px) {
.section {
padding: 60px 0;
}
.section-title {
font-size: 26px;
}
.category-hero {
padding: 44px 0 40px;
}
.category-hero-content h1 {
font-size: 30px;
}
.timeline-section {
padding: 60px 0;
}
.timeline-container {
padding-left: 28px;
}
.timeline-container::before {
left: 10px;
}
.timeline-item {
padding: 0 0 36px 28px;
}
.timeline-item::before {
left: -28px;
width: 12px;
height: 12px;
border-width: 2px;
}
.timeline-item-card {
padding: 20px 18px;
}
.timeline-item-card h3 {
font-size: 18px;
}
.timeline-header-row {
flex-direction: column;
align-items: flex-start;
}
.footer-inner {
grid-template-columns: 1fr;
gap: 28px;
}
.footer-bottom {
flex-direction: column;
align-items: flex-start;
}
.breadcrumb {
padding-top: 76px;
}
}

@media (max-width: 480px) {
.category-hero-content h1 {
font-size: 26px;
}
.timeline-item-card p {
font-size: 14px;
}
.timeline-filter button {
font-size: 12px;
padding: 6px 12px;
}
.pagination a,
.pagination span {
min-width: 32px;
height: 32px;
font-size: 12px;
padding: 0 8px;
}
.timeline-image-wrap img {
height: 170px;
}
}

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.contact-form { background: var(--primary-soft); border: 1px solid var(--border-dark); border-radius: var(--radius-card-lg); padding: 28px; box-shadow: var(--shadow-dark); }
.contact-form .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 12px; }
.contact-form input, .contact-form textarea { width: 100%; padding: 12px 14px; border: 1px solid var(--border-dark); border-radius: var(--radius-btn); background: rgba(11,18,32,0.4); color: var(--text-dark); font-size: 15px; transition: border-color var(--transition), box-shadow var(--transition); }
.contact-form input::placeholder, .contact-form textarea::placeholder { color: var(--text-muted-dark); }
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(232,169,61,0.15); outline: none; }
.contact-form textarea { resize: vertical; margin-bottom: 16px; }
.contact-form .btn { width: auto; }
@media (max-width:768px){
.contact-grid { grid-template-columns:1fr; gap:24px; }
.contact-form .form-row { grid-template-columns:1fr; }
}

/* roulang page: category6 */
:root {
  --primary: #0B1220;
  --primary-soft: #111B30;
  --accent: #E8A93D;
  --accent-hover: #C7912E;
  --bg-light: #F5F0E6;
  --bg-light-soft: #EDE8DC;
  --text-dark: #E8ECF1;
  --text-light: #1A2233;
  --text-muted-dark: #8B94A7;
  --text-muted-light: #6B7280;
  --border-dark: rgba(232, 169, 61, 0.18);
  --border-light: rgba(26, 34, 51, 0.12);
  --radius-card-lg: 12px;
  --radius-card-sm: 8px;
  --radius-btn: 6px;
  --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-light: 0 4px 16px rgba(11, 18, 32, 0.08);
  --container-max: 1200px;
  --transition: 0.25s ease;
  --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-light);
  background-color: var(--primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
*, *::before, *::after {
  box-sizing: border-box;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-card-sm);
}
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
}
a:hover {
  color: var(--accent);
}
button, input, textarea {
  font-family: var(--font-sans);
  font-size: 16px;
  color: inherit;
  outline: none;
}
button {
  cursor: pointer;
  border: none;
  background: none;
}
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 80px 0;
}
.section-dark {
  background-color: var(--primary);
  color: var(--text-dark);
}
.section-light {
  background-color: var(--bg-light);
  color: var(--text-light);
}
.section-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.section-subtitle {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.9;
  margin-bottom: 48px;
  max-width: 720px;
  color: var(--text-muted-dark);
}
.section-light .section-subtitle {
  color: var(--text-muted-light);
}
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(232, 169, 61, 0.12);
  border: 1px solid var(--border-dark);
  border-radius: 20px;
  padding: 4px 14px;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}
.section-light .section-tag {
  background: rgba(232, 169, 61, 0.10);
  border-color: var(--border-light);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-btn);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.03em;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.btn:focus-visible {
  outline: 2px solid rgba(232, 169, 61, 0.4);
  outline-offset: 2px;
}
.btn-primary {
  background-color: var(--accent);
  color: #1A2233;
  border-color: var(--accent);
}
.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #1A2233;
}
.btn-primary:active {
  transform: translateY(1px);
}
.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn-outline:hover {
  background: rgba(232, 169, 61, 0.10);
  color: var(--accent);
}
.btn-outline:active {
  transform: translateY(1px);
}
.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-weight: 600;
  font-size: 15px;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}
.btn-text:hover {
  border-bottom-color: var(--accent);
  color: var(--accent);
}
.btn-text .arrow {
  font-size: 18px;
  transition: transform var(--transition);
}
.btn-text:hover .arrow {
  transform: translateX(4px);
}
/* Header / Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 18, 32, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(232, 169, 61, 0.10);
  transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.site-header.scrolled {
  background: rgba(11, 18, 32, 0.96);
  border-bottom-color: var(--border-dark);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}
.logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: 0.06em;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.logo::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 14px rgba(232, 169, 61, 0.8);
  display: inline-block;
}
.logo:hover {
  color: var(--accent);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.main-nav a {
  color: rgba(232, 236, 241, 0.78);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 3px;
  border-radius: 2px;
  background: var(--accent);
  transition: width var(--transition);
}
.main-nav a:hover {
  color: var(--text-dark);
}
.main-nav a:hover::after {
  width: 100%;
}
.main-nav a.active {
  color: var(--accent);
}
.main-nav a.active::after {
  width: 100%;
}
.nav-cta {
  background: var(--accent);
  color: #1A2233;
  padding: 10px 20px;
  border-radius: var(--radius-btn);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.03em;
  border: 1px solid var(--accent);
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-cta:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #1A2233;
}
.nav-cta:active {
  transform: translateY(1px);
}
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: pointer;
  background: none;
  border: none;
}
.menu-toggle span {
  width: 26px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all var(--transition);
}
.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
/* Breadcrumb */
.breadcrumb-wrap {
  padding-top: 110px;
  background-color: var(--primary);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted-dark);
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--text-muted-dark);
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .sep {
  color: rgba(232, 169, 61, 0.5);
}
.breadcrumb .current {
  color: var(--accent);
  font-weight: 600;
}
/* Category Hero */
.category-hero {
  background-color: var(--primary);
  background-image: linear-gradient(180deg, rgba(11, 18, 32, 0.92) 0%, rgba(11, 18, 32, 0.75) 100%), url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  padding: 64px 0 72px;
  position: relative;
  overflow: hidden;
}
.category-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.6;
}
.category-hero h1 {
  font-size: 40px;
  font-weight: 800;
  color: var(--text-dark);
  margin: 20px 0 16px;
  line-height: 1.35;
  letter-spacing: 0.03em;
}
.category-hero h1 .highlight {
  color: var(--accent);
}
.category-hero p {
  font-size: 18px;
  line-height: 1.9;
  color: rgba(232, 236, 241, 0.82);
  max-width: 680px;
  margin-bottom: 32px;
}
.category-hero .hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
/* Filter Tags */
.filter-section {
  background-color: var(--primary-soft);
  border-top: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
  padding: 20px 0;
}
.filter-slider {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 4px 0;
}
.filter-slider::-webkit-scrollbar {
  display: none;
}
.filter-tag {
  flex-shrink: 0;
  padding: 8px 20px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 600;
  color: rgba(232, 236, 241, 0.72);
  background: rgba(232, 169, 61, 0.06);
  border: 1px solid rgba(232, 169, 61, 0.22);
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.filter-tag:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(232, 169, 61, 0.12);
}
.filter-tag.active {
  background: var(--accent);
  color: #1A2233;
  border-color: var(--accent);
  font-weight: 700;
}
/* Cards Grid */
.cards-grid-section {
  background-color: var(--primary);
  padding: 64px 0 40px;
}
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.training-card {
  background: var(--primary-soft);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-card-lg);
  overflow: hidden;
  box-shadow: var(--shadow-dark);
  transition: all var(--transition);
  cursor: pointer;
}
.training-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.45);
}
.training-card .card-img {
  height: 200px;
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}
.training-card .card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(11, 18, 32, 0.6) 100%);
}
.training-card .card-body {
  padding: 22px 24px 24px;
}
.training-card .card-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(232, 169, 61, 0.10);
  border: 1px solid var(--border-dark);
  border-radius: 16px;
  padding: 3px 12px;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}
.training-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0 0 10px;
  line-height: 1.5;
}
.training-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-muted-dark);
  margin: 0 0 16px;
}
.training-card .card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all var(--transition);
}
.training-card .card-link:hover {
  gap: 8px;
  color: var(--accent-hover);
}
.training-card.hidden {
  display: none;
}
/* Deep Content */
.deep-content-section {
  background-color: var(--bg-light);
  padding: 80px 0;
}
.deep-content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.deep-content-left h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-light);
  margin: 0 0 16px;
  line-height: 1.4;
}
.deep-content-left p {
  font-size: 16px;
  line-height: 1.95;
  color: var(--text-muted-light);
  margin-bottom: 20px;
}
.deep-content-left ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.deep-content-left ul li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-light);
  margin-bottom: 12px;
}
.deep-content-left ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.deep-content-right {
  background: var(--bg-light-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card-lg);
  padding: 32px;
  box-shadow: var(--shadow-light);
}
.deep-content-right h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-light);
  margin: 0 0 16px;
}
.deep-content-right .stat-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.deep-content-right .stat-item {
  flex: 1;
  min-width: 100px;
  text-align: center;
  padding: 16px 12px;
  background: rgba(232, 169, 61, 0.06);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card-sm);
}
.deep-content-right .stat-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  display: block;
  margin-bottom: 6px;
}
.deep-content-right .stat-label {
  font-size: 13px;
  color: var(--text-muted-light);
  font-weight: 500;
}
/* FAQ */
.faq-section {
  background-color: var(--primary);
  padding: 80px 0;
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--primary-soft);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-card-sm);
  margin-bottom: 14px;
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover {
  border-color: rgba(232, 169, 61, 0.4);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  background: none;
  border: none;
  color: var(--text-dark);
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.01em;
}
.faq-question .faq-icon {
  font-size: 22px;
  font-weight: 300;
  color: var(--accent);
  transition: all var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.35s ease;
  color: var(--text-muted-dark);
  font-size: 15px;
  line-height: 1.9;
  border-left: 3px solid transparent;
}
.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 4px 24px 20px;
  border-left-color: var(--accent);
  background: rgba(232, 169, 61, 0.04);
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
}
/* CTA */
.cta-section {
  background-color: var(--bg-light);
  padding: 80px 0;
}
.cta-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: stretch;
}
.cta-info {
  background: var(--primary);
  border-radius: var(--radius-card-lg);
  padding: 36px;
  color: var(--text-dark);
}
.cta-info h2 {
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 16px;
  line-height: 1.4;
}
.cta-info p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-muted-dark);
  margin: 0 0 20px;
}
.cta-info .info-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  margin-bottom: 12px;
  color: rgba(232, 236, 241, 0.85);
}
.cta-info .info-item::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.cta-form-wrap {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card-lg);
  padding: 36px;
  box-shadow: var(--shadow-light);
}
.cta-form-wrap h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-light);
  margin: 0 0 20px;
}
.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 6px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-btn);
  border: 1px solid var(--border-light);
  background: #faf8f3;
  font-size: 15px;
  color: var(--text-light);
  transition: all var(--transition);
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(232, 169, 61, 0.15);
  background: #fff;
}
.form-group textarea {
  min-height: 110px;
  resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #9ca3af;
}
/* Pagination */
.pagination-section {
  background-color: var(--primary);
  padding: 20px 0 60px;
}
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.pagination .page-link,
.pagination .page-dots {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 600;
  color: rgba(232, 236, 241, 0.75);
  background: transparent;
  border: 1px solid var(--border-dark);
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
}
.pagination .page-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.pagination .page-link.active {
  background: var(--accent);
  color: #1A2233;
  border-color: var(--accent);
  font-weight: 700;
}
.pagination .page-nav {
  padding: 0 16px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 600;
  color: rgba(232, 236, 241, 0.75);
  border: 1px solid var(--border-dark);
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
  gap: 6px;
}
.pagination .page-nav:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.pagination .page-dots {
  border: none;
  cursor: default;
}
/* Footer */
.site-footer {
  background-color: #080E1A;
  padding: 60px 0 24px;
  border-top: 1px solid var(--border-dark);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(232, 169, 61, 0.10);
}
.footer-brand .logo {
  font-size: 22px;
  margin-bottom: 14px;
  display: inline-flex;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-muted-dark);
  max-width: 380px;
  margin: 0;
}
.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.footer-link-group h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0 0 14px;
  letter-spacing: 0.04em;
}
.footer-link-group a {
  display: block;
  font-size: 14px;
  color: rgba(232, 236, 241, 0.6);
  margin-bottom: 8px;
  transition: all var(--transition);
}
.footer-link-group a:hover {
  color: var(--accent);
  text-decoration: underline;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 20px;
  font-size: 13px;
  color: rgba(232, 236, 241, 0.5);
}
.footer-bottom a {
  color: rgba(232, 236, 241, 0.5);
}
.footer-bottom a:hover {
  color: var(--accent);
  text-decoration: underline;
}
.footer-bottom .sep {
  margin: 0 8px;
  opacity: 0.5;
}
/* Responsive */
@media (max-width: 1024px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .deep-content-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .cta-wrap {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    grid-template-columns: 1fr;
  }
  .category-hero h1 {
    font-size: 34px;
  }
}
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(11, 18, 32, 0.98);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 0;
    border-bottom: 1px solid var(--border-dark);
    transform: translateY(-120%);
    transition: transform var(--transition);
    z-index: 999;
  }
  .main-nav.show {
    transform: translateY(0);
  }
  .main-nav a {
    width: 100%;
    padding: 14px 0;
    font-size: 16px;
    border-bottom: 1px solid rgba(232, 169, 61, 0.08);
  }
  .main-nav a.active {
    border-left: 3px solid var(--accent);
    padding-left: 16px;
  }
  .main-nav a::after {
    display: none;
  }
  .nav-cta {
    width: 100%;
    margin-top: 12px;
    justify-content: center;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 60px 0;
  }
  .section-title {
    font-size: 26px;
  }
  .category-hero {
    padding: 48px 0 56px;
  }
  .category-hero h1 {
    font-size: 28px;
  }
  .category-hero p {
    font-size: 16px;
  }
  .filter-tag {
    padding: 7px 16px;
    font-size: 13px;
  }
  .deep-content-right .stat-row {
    flex-direction: column;
  }
  .footer-links {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  .pagination .page-link,
  .pagination .page-dots {
    width: 36px;
    height: 36px;
    font-size: 13px;
  }
  .pagination .page-nav {
    padding: 0 12px;
    font-size: 13px;
    height: 36px;
  }
}
@media (max-width: 520px) {
  .category-hero h1 {
    font-size: 24px;
  }
  .category-hero .hero-actions {
    flex-direction: column;
    gap: 10px;
  }
  .category-hero .hero-actions .btn {
    width: 100%;
  }
  .footer-links {
    grid-template-columns: 1fr;
  }
  .training-card .card-img {
    height: 160px;
  }
  .deep-content-right {
    padding: 20px;
  }
  .cta-info {
    padding: 24px;
  }
  .cta-form-wrap {
    padding: 24px;
  }
  .cards-grid-section {
    padding: 40px 0 20px;
  }
  .pagination-section {
    padding: 16px 0 40px;
  }
  .pagination {
    gap: 4px;
  }
  .pagination .page-link,
  .pagination .page-dots {
    width: 32px;
    height: 32px;
    font-size: 12px;
  }
  .pagination .page-nav {
    padding: 0 10px;
    font-size: 12px;
    height: 32px;
  }
  .breadcrumb-wrap {
    padding-top: 100px;
  }
}

/* roulang page: category7 */
:root {
            --primary: #0B1220;
            --primary-soft: #111B30;
            --accent: #E8A93D;
            --accent-hover: #C7912E;
            --bg-light: #F5F0E6;
            --bg-light-soft: #EDE8DC;
            --text-dark: #E8ECF1;
            --text-light: #1A2233;
            --text-muted-dark: #8B94A7;
            --text-muted-light: #6B7280;
            --border-dark: rgba(232, 169, 61, 0.18);
            --border-light: rgba(26, 34, 51, 0.12);
            --radius-card-lg: 12px;
            --radius-card-sm: 8px;
            --radius-btn: 6px;
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-light: 0 4px 16px rgba(11, 18, 32, 0.08);
            --container-max: 1200px;
            --transition: 0.25s ease;
            --font-sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-light);
            background-color: var(--primary);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card-sm);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
        }

        a:hover {
            color: var(--accent);
        }

        button,
        input,
        textarea {
            font-family: var(--font-sans);
            font-size: 16px;
            color: inherit;
            outline: none;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 80px 0;
        }

        .section-dark {
            background-color: var(--primary);
            color: var(--text-dark);
        }

        .section-light {
            background-color: var(--bg-light);
            color: var(--text-light);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .section-subtitle {
            font-size: 16px;
            font-weight: 400;
            line-height: 1.9;
            margin-bottom: 48px;
            max-width: 720px;
            color: var(--text-muted-dark);
        }

        .section-light .section-subtitle {
            color: var(--text-muted-light);
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(232, 169, 61, 0.12);
            border: 1px solid var(--border-dark);
            border-radius: 20px;
            padding: 4px 14px;
            margin-bottom: 16px;
            letter-spacing: 0.05em;
        }

        .section-light .section-tag {
            background: rgba(232, 169, 61, 0.10);
            border-color: var(--border-light);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 15px;
            letter-spacing: 0.03em;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .btn:focus-visible {
            outline: 2px solid rgba(232, 169, 61, 0.4);
            outline-offset: 2px;
        }

        .btn-primary {
            background-color: var(--accent);
            color: #1A2233;
            border-color: var(--accent);
        }

        .btn-primary:hover {
            background-color: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #1A2233;
        }

        .btn-primary:active {
            transform: translateY(1px);
        }

        .btn-outline {
            background: transparent;
            color: var(--accent);
            border-color: var(--accent);
        }

        .btn-outline:hover {
            background: rgba(232, 169, 61, 0.10);
            color: var(--accent);
        }

        .btn-outline:active {
            transform: translateY(1px);
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            padding: 4px 0;
            border-bottom: 1px solid transparent;
            transition: all var(--transition);
        }

        .btn-text:hover {
            border-bottom-color: var(--accent);
            color: var(--accent);
        }

        .btn-text .arrow {
            font-size: 18px;
            transition: transform var(--transition);
        }

        .btn-text:hover .arrow {
            transform: translateX(4px);
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 18, 32, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(232, 169, 61, 0.10);
            transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(11, 18, 32, 0.96);
            border-bottom-color: var(--border-dark);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 76px;
        }

        .logo {
            font-size: 24px;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: 0.06em;
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .logo::before {
            content: '';
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 12px rgba(232, 169, 61, 0.8);
            display: inline-block;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .main-nav a {
            color: var(--text-muted-dark);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 0;
            position: relative;
            transition: color var(--transition);
        }

        .main-nav a::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            background: var(--accent);
            transform: scaleX(0);
            transition: transform var(--transition);
        }

        .main-nav a:hover,
        .main-nav a.active {
            color: var(--accent);
        }

        .main-nav a:hover::after,
        .main-nav a.active::after {
            transform: scaleX(1);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 20px;
            border-radius: var(--radius-btn);
            background: var(--accent);
            color: #1A2233;
            font-weight: 700;
            font-size: 14px;
            transition: all var(--transition);
        }

        .header-cta:hover {
            background: var(--accent-hover);
            color: #1A2233;
        }

        .header-cta:active {
            transform: translateY(1px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 6px;
            width: 44px;
            height: 44px;
            padding: 10px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-dark);
            background: transparent;
            transition: all var(--transition);
        }

        .nav-toggle span {
            display: block;
            width: 100%;
            height: 2px;
            background: var(--text-dark);
            transition: all var(--transition);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 6px);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -6px);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background: var(--primary-soft);
            border-top: 1px solid var(--border-dark);
            border-bottom: 1px solid var(--border-dark);
            padding: 14px 0;
            margin-top: 76px;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted-dark);
        }

        .breadcrumb a {
            color: var(--text-muted-dark);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .sep {
            color: var(--accent);
            opacity: 0.6;
        }

        .breadcrumb .current {
            color: var(--accent);
            font-weight: 600;
        }

        /* Hero */
        .inner-hero {
            background: linear-gradient(135deg, #0B1220 0%, #111B30 55%, #1A253B 100%);
            padding: 70px 0 60px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-dark);
        }

        .inner-hero::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -40px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(232, 169, 61, 0.12), transparent 70%);
            pointer-events: none;
        }

        .inner-hero-content {
            position: relative;
            z-index: 1;
        }

        .inner-hero h1 {
            font-size: 44px;
            font-weight: 800;
            color: var(--text-dark);
            line-height: 1.35;
            margin: 0 0 20px;
            letter-spacing: 0.02em;
        }

        .inner-hero .lead {
            font-size: 17px;
            color: var(--text-muted-dark);
            max-width: 780px;
            line-height: 1.9;
            margin-bottom: 28px;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: var(--text-muted-dark);
        }

        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .hero-meta .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            display: inline-block;
        }

        /* Article grid */
        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 320px;
            gap: 40px;
            align-items: start;
        }

        .article-main {
            background: var(--bg-light);
            border-radius: var(--radius-card-lg);
            padding: 40px;
            box-shadow: var(--shadow-light);
            min-width: 0;
        }

        .article-main .article-cover {
            border-radius: var(--radius-card-sm);
            overflow: hidden;
            margin-bottom: 32px;
            background: var(--bg-light-soft);
        }

        .article-main h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-light);
            margin: 28px 0 14px;
            line-height: 1.5;
        }

        .article-main p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 2;
            margin-bottom: 18px;
        }

        .article-main .highlight {
            background: var(--bg-light-soft);
            border-left: 3px solid var(--accent);
            padding: 20px 24px;
            border-radius: 0 var(--radius-card-sm) var(--radius-card-sm) 0;
            margin: 24px 0;
            color: var(--text-light);
        }

        .related-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 20px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .related-card {
            background: var(--primary-soft);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-lg);
            overflow: hidden;
            padding: 16px;
            transition: all var(--transition);
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--accent);
            box-shadow: var(--shadow-dark);
        }

        .related-card img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            margin-bottom: 14px;
            border-radius: var(--radius-card-sm);
        }

        .related-card h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .related-card p {
            font-size: 14px;
            color: var(--text-muted-dark);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .related-card .btn-text {
            font-size: 14px;
        }

        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }

        .sidebar-widget {
            background: var(--primary-soft);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-lg);
            padding: 24px;
            color: var(--text-dark);
        }

        .sidebar-widget h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .sidebar-widget ul {
            list-style: none;
        }

        .sidebar-widget li {
            font-size: 15px;
            color: var(--text-muted-dark);
            padding: 8px 0;
            border-bottom: 1px solid rgba(232, 169, 61, 0.06);
            transition: color var(--transition);
        }

        .sidebar-widget li:last-child {
            border-bottom: none;
        }

        .sidebar-widget li a:hover {
            color: var(--accent);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-cloud a {
            font-size: 13px;
            padding: 6px 12px;
            border: 1px solid var(--border-dark);
            border-radius: 20px;
            color: var(--text-muted-dark);
            background: rgba(232, 169, 61, 0.06);
            transition: all var(--transition);
        }

        .tag-cloud a:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(232, 169, 61, 0.12);
        }

        /* Pagination */
        .pagination-section {
            background: var(--bg-light);
            padding: 30px 0 60px;
        }

        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 42px;
            height: 42px;
            padding: 0 14px;
            border-radius: 50%;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-light);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .pagination a:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .pagination .current {
            background: var(--accent);
            color: #1A2233;
            border-color: var(--accent);
        }

        .pagination .disabled {
            opacity: 0.5;
            pointer-events: none;
        }

        /* FAQ */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--primary-soft);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card-sm);
            margin-bottom: 16px;
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item[open] {
            border-left: 3px solid var(--accent);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            list-style: none;
            transition: color var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            color: var(--accent);
        }

        .faq-icon {
            font-size: 22px;
            color: var(--accent);
            flex-shrink: 0;
            transition: transform var(--transition);
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
        }

        .faq-body {
            padding: 0 22px 20px;
            color: var(--text-muted-dark);
            font-size: 15px;
            line-height: 1.9;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #0B1220, #1A253B);
            text-align: center;
            padding: 90px 0;
            border-top: 1px solid var(--border-dark);
        }

        .cta-section h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 16px;
            color: var(--text-muted-dark);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.9;
        }

        /* Footer */
        .site-footer {
            background: #080D17;
            color: var(--text-muted-dark);
            padding: 60px 0 24px;
            border-top: 1px solid rgba(232, 169, 61, 0.12);
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            font-size: 22px;
            color: var(--text-dark);
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.9;
            color: var(--text-muted-dark);
            max-width: 320px;
        }

        .footer-link-group h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 14px;
        }

        .footer-link-group a {
            display: block;
            font-size: 14px;
            color: var(--text-muted-dark);
            padding: 4px 0;
            transition: color var(--transition);
        }

        .footer-link-group a:hover {
            color: var(--accent);
            text-decoration: underline;
        }

        .footer-bottom {
            border-top: 1px solid rgba(232, 169, 61, 0.10);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted-dark);
        }

        .footer-bottom .sep {
            margin: 0 8px;
            opacity: 0.5;
        }

        .footer-bottom a {
            color: var(--text-muted-dark);
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--accent);
            text-decoration: underline;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }

            .sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
            }

            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: absolute;
                top: 76px;
                left: 0;
                right: 0;
                background: rgba(11, 18, 32, 0.98);
                border-bottom: 1px solid var(--border-dark);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 12px 24px;
                display: none;
                box-shadow: var(--shadow-dark);
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav a {
                padding: 14px 0;
                border-bottom: 1px solid rgba(232, 169, 61, 0.08);
            }

            .main-nav a::after {
                display: none;
            }

            .main-nav a.active {
                border-left: 3px solid var(--accent);
                padding-left: 12px;
            }

            .header-cta {
                display: none;
            }

            .inner-hero h1 {
                font-size: 32px;
            }

            .article-main {
                padding: 24px;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .sidebar {
                grid-template-columns: 1fr;
            }

            .footer-inner {
                grid-template-columns: 1fr;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .section {
                padding: 60px 0;
            }

            .section-title {
                font-size: 26px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .inner-hero h1 {
                font-size: 28px;
            }

            .article-main {
                padding: 18px;
            }

            .article-main h2 {
                font-size: 20px;
            }

            .btn {
                width: 100%;
                justify-content: center;
            }

            .pagination a,
            .pagination span {
                min-width: 36px;
                height: 36px;
                padding: 0 10px;
                font-size: 13px;
            }
        }