/* roulang page: index */
:root {
            --primary: #1B3A4B;
            --primary-light: #2D5A6E;
            --primary-dark: #122A37;
            --accent: #E67E22;
            --accent-light: #F0A868;
            --bg-main: #F7F5F2;
            --bg-white: #FFFFFF;
            --bg-alt: #EFECE6;
            --text-main: #1E2A32;
            --text-muted: #6B7B85;
            --border-color: rgba(27, 58, 75, 0.12);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 12px rgba(27, 58, 75, 0.06);
            --shadow-md: 0 10px 30px rgba(27, 58, 75, 0.10);
            --shadow-lg: 0 24px 60px rgba(27, 58, 75, 0.14);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-serif: "Songti SC", "Times New Roman", "Noto Serif SC", 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);
            background-color: var(--bg-main);
            color: var(--text-main);
            line-height: 1.75;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ---- Header / Nav ---- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(27, 58, 75, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            gap: 16px;
        }

        .brand {
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .brand i {
            color: var(--accent);
            font-size: 1.2rem;
        }

        .brand:hover {
            color: var(--primary);
            opacity: 0.85;
        }

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--bg-alt);
            padding: 5px;
            border-radius: 50px;
        }

        .nav-tab {
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            white-space: nowrap;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .nav-tab:hover {
            color: var(--primary);
            background: rgba(255, 255, 255, 0.6);
        }

        .nav-tab.active {
            background: var(--bg-white);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
            border-color: var(--border-color);
            font-weight: 600;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-brand {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 50px;
            padding: 10px 24px;
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-brand:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(27, 58, 75, 0.25);
        }

        .btn-outline-brand {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            border: 1.5px solid rgba(27, 58, 75, 0.25);
            border-radius: 50px;
            padding: 10px 24px;
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-outline-brand:hover {
            border-color: var(--primary);
            background: rgba(27, 58, 75, 0.04);
            transform: translateY(-2px);
        }

        /* ---- Hero ---- */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 120px 0 100px;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(18, 42, 55, 0.88) 0%, rgba(27, 58, 75, 0.72) 45%, rgba(27, 58, 75, 0.35) 100%);
            z-index: 1;
        }

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

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 400;
            backdrop-filter: blur(8px);
            margin-bottom: 24px;
        }

        .hero-badge i {
            color: var(--accent-light);
        }

        .hero h1 {
            font-family: var(--font-serif);
            font-size: 3.2rem;
            line-height: 1.2;
            color: #fff;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero-sub {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 540px;
        }

        .hero-sub strong {
            color: var(--accent-light);
            font-weight: 600;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 40px;
        }

        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: 50px;
            padding: 14px 32px;
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 8px 24px rgba(230, 126, 34, 0.35);
        }

        .btn-hero-primary:hover {
            background: var(--accent-light);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(230, 126, 34, 0.45);
        }

        .btn-hero-ghost {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            border-radius: 50px;
            padding: 14px 32px;
            font-size: 1rem;
            font-weight: 500;
            transition: var(--transition);
            backdrop-filter: blur(4px);
        }

        .btn-hero-ghost:hover {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            transform: translateY(-3px);
            border-color: rgba(255, 255, 255, 0.7);
        }

        .hero-trust {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
        }

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

        .hero-trust i {
            color: var(--accent-light);
        }

        .hero-wave {
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 100%;
            z-index: 2;
            line-height: 0;
        }

        .hero-wave svg {
            width: 100%;
            height: 70px;
            display: block;
        }

        /* ---- Section Base ---- */
        .section {
            padding: 90px 0;
        }

        .section-alt {
            background: var(--bg-alt);
        }

        .section-white {
            background: var(--bg-white);
        }

        .section-tag {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 12px;
            background: rgba(230, 126, 34, 0.08);
            padding: 6px 16px;
            border-radius: 50px;
        }

        .section-title {
            font-family: var(--font-serif);
            font-size: 2.3rem;
            color: var(--primary);
            line-height: 1.3;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .section-desc {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 640px;
        }

        .section-head {
            margin-bottom: 56px;
        }

        /* ---- About Intro ---- */
        .about-grid {
            display: grid;
            grid-template-columns: 1.05fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .about-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .about-media img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            transition: var(--transition);
        }

        .about-media:hover img {
            transform: scale(1.04);
        }

        .about-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(27, 58, 75, 0.25), transparent 60%);
        }

        .about-badge-float {
            position: absolute;
            left: 24px;
            bottom: 24px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            border-radius: var(--radius-md);
            padding: 12px 20px;
            z-index: 2;
            box-shadow: var(--shadow-md);
        }

        .about-badge-float .num {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.1;
        }

        .about-badge-float .label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .about-copy h2 {
            font-family: var(--font-serif);
            font-size: 2.1rem;
            line-height: 1.35;
            color: var(--primary);
            margin-bottom: 20px;
            font-weight: 700;
        }

        .about-copy p {
            color: var(--text-muted);
            margin-bottom: 20px;
            line-height: 1.9;
        }

        .about-points {
            margin-top: 28px;
            list-style: none;
            padding: 0;
        }

        .about-points li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .about-points li:last-child {
            border-bottom: none;
        }

        .about-points li i {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            background: rgba(230, 126, 34, 0.12);
            color: var(--accent);
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
        }

        .about-points li .point-title {
            font-weight: 600;
            color: var(--primary);
            display: block;
            font-size: 1rem;
        }

        .about-points li .point-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* ---- Category Entry ---- */
        .category-cards {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }

        .category-card-media {
            height: 240px;
            overflow: hidden;
            position: relative;
        }

        .category-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .category-card:hover .category-card-media img {
            transform: scale(1.06);
        }

        .category-card-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(27, 58, 75, 0.4), transparent 60%);
        }

        .category-card-tag {
            position: absolute;
            top: 18px;
            left: 18px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 50px;
            box-shadow: var(--shadow-sm);
        }

        .category-card-body {
            padding: 28px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .category-card-body h3 {
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            font-family: var(--font-serif);
        }

        .category-card-body p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.75;
            margin-bottom: 20px;
            flex: 1;
        }

        .category-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 18px;
        }

        .category-card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: var(--primary);
            font-size: 0.95rem;
        }

        .category-card-link i {
            transition: var(--transition);
        }

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

        .category-card-link:hover i {
            transform: translateX(5px);
        }

        /* ---- Latest News ---- */
        .latest-section {
            background: var(--bg-white);
        }

        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .news-card {
            display: block;
            background: var(--bg-main);
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
        }

        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
            background: var(--bg-white);
        }

        .news-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            margin-bottom: 16px;
        }

        .badge-soft {
            display: inline-block;
            background: rgba(230, 126, 34, 0.12);
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
            word-break: keep-all;
        }

        .news-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }

        .news-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--primary);
            line-height: 1.5;
            margin-bottom: 10px;
            transition: var(--transition);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card:hover h3 {
            color: var(--accent);
        }

        .news-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-more {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .news-more i {
            font-size: 0.8rem;
            transition: var(--transition);
        }

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

        .news-card:hover .news-more i {
            transform: translateX(4px);
        }

        .empty-tip {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            background: var(--bg-main);
            border-radius: var(--radius-md);
            font-size: 1rem;
        }

        .section-footer-link {
            text-align: center;
            margin-top: 40px;
        }

        .btn-text-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 500;
            border-bottom: 2px solid transparent;
            padding-bottom: 4px;
        }

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

        /* ---- Stats Band ---- */
        .stats-section {
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            position: relative;
            padding: 100px 0;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(18, 42, 55, 0.88);
        }

        .stats-section .container {
            position: relative;
            z-index: 1;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .stat-item {
            text-align: center;
            padding: 32px 20px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            transition: var(--transition);
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-4px);
        }

        .stat-number {
            font-size: 2.8rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
            font-family: var(--font-serif);
        }

        .stat-number span {
            color: var(--accent-light);
        }

        .stat-label {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            margin-top: 8px;
        }

        .stat-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            background: rgba(230, 126, 34, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-light);
            font-size: 1.4rem;
        }

        /* ---- Method Tools ---- */
        .tools-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .tool-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .tool-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(to right, var(--accent), var(--accent-light));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.4s ease;
        }

        .tool-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .tool-card:hover::before {
            transform: scaleX(1);
        }

        .tool-icon {
            width: 56px;
            height: 56px;
            background: rgba(27, 58, 75, 0.08);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .tool-card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .tool-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 18px;
        }

        .tool-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tool-tags span {
            background: var(--bg-alt);
            color: var(--text-muted);
            font-size: 0.8rem;
            padding: 4px 12px;
            border-radius: 50px;
        }

        /* ---- Featured Content ---- */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .featured-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .featured-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .featured-media {
            height: 220px;
            overflow: hidden;
            position: relative;
        }

        .featured-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

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

        .featured-body {
            padding: 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .featured-body .featured-cat {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--accent);
            margin-bottom: 10px;
        }

        .featured-body h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
            font-family: var(--font-serif);
        }

        .featured-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
        }

        .featured-body .featured-footer {
            margin-top: 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
        }

        .featured-footer .read-time {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .featured-footer .read-link {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .featured-footer .read-link:hover {
            color: var(--accent);
        }

        /* ---- FAQ ---- */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            padding: 24px 28px;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(230, 126, 34, 0.3);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            margin: 0;
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            background: rgba(230, 126, 34, 0.12);
            color: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: var(--transition);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        .faq-answer-inner {
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
            margin-top: 14px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        /* ---- CTA ---- */
        .cta-section {
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 100px 0;
            border-radius: 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(18, 42, 55, 0.92), rgba(27, 58, 75, 0.78));
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .cta-title {
            font-family: var(--font-serif);
            font-size: 2.4rem;
            color: #fff;
            font-weight: 700;
            margin-bottom: 16px;
            line-height: 1.35;
        }

        .cta-desc {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }

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

        /* ---- Footer ---- */
        .site-footer {
            background: var(--primary-dark);
            padding: 80px 0 30px;
            color: rgba(255, 255, 255, 0.7);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 50px;
        }

        .footer-brand {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand i {
            color: var(--accent-light);
        }

        .footer-desc {
            font-size: 0.92rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
        }

        .footer-links a:hover {
            color: var(--accent-light);
        }

        .footer-contact-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-contact-list li {
            display: flex;
            gap: 12px;
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-contact-list i {
            color: var(--accent-light);
            margin-top: 4px;
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a:hover {
            color: var(--accent-light);
        }

        /* ---- Responsive ---- */
        @media (max-width: 991px) {
            .about-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .about-media img {
                height: 320px;
            }

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

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

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

            .header-inner {
                flex-wrap: wrap;
                padding: 12px 0;
            }

            .nav-tabs {
                order: 3;
                width: 100%;
                overflow-x: auto;
                justify-content: flex-start;
            }

            .header-cta .btn-outline-brand {
                display: none;
            }
        }

        @media (max-width: 767px) {
            .hero {
                min-height: 85vh;
                padding: 100px 0 80px;
            }

            .hero h1 {
                font-size: 2.3rem;
            }

            .hero-sub {
                font-size: 1rem;
            }

            .section {
                padding: 60px 0;
            }

            .section-title {
                font-size: 1.8rem;
            }

            .category-cards {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .news-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }

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

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

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

            .stat-number {
                font-size: 2.2rem;
            }

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

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

            .header-cta .btn-brand {
                padding: 8px 16px;
                font-size: 0.85rem;
            }

            .brand {
                font-size: 1.2rem;
            }

            .nav-tab {
                padding: 6px 14px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.8rem;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .btn-hero-primary,
            .btn-hero-ghost {
                justify-content: center;
            }

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

            .stat-item {
                padding: 24px 16px;
            }

            .section-head {
                margin-bottom: 36px;
            }

            .cta-title {
                font-size: 1.8rem;
            }

            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .header-cta .btn-brand {
                display: none;
            }

            .about-media img {
                height: 240px;
            }

            .about-copy h2 {
                font-size: 1.6rem;
            }

            .news-card {
                padding: 20px;
            }

            .tool-card {
                padding: 24px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }

        :focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #1a2a6c;
            --primary-rgb: 26, 42, 108;
            --accent: #f97316;
            --accent-rgb: 249, 115, 22;
            --bg: #f8fafc;
            --bg-light: #f1f5f9;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --section-padding: 96px;
        }

        /* ========== Reset / Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            padding-left: 0;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ========== Header / 导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 24px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 21px;
            letter-spacing: -0.02em;
            color: var(--primary);
            flex-shrink: 0;
        }
        .brand i {
            font-size: 22px;
            color: var(--accent);
        }
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--bg-light);
            padding: 4px;
            border-radius: 40px;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .nav-tabs::-webkit-scrollbar {
            display: none;
        }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 8px 22px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-weak);
            white-space: nowrap;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .nav-tab:hover {
            color: var(--primary);
            background: rgba(255, 255, 255, 0.8);
        }
        .nav-tab.active {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.07);
            border-color: rgba(226, 232, 240, 0.6);
        }
        .header-cta .btn-brand {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 10px 22px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 600;
            border: none;
            transition: var(--transition);
        }
        .header-cta .btn-brand:hover {
            background: var(--accent);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.35);
        }
        .header-cta .btn-brand:focus-visible {
            outline: 3px solid rgba(249, 115, 22, 0.4);
        }

        /* ========== Banner ========== */
        .category-banner {
            position: relative;
            padding: 100px 0 80px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: #fff;
            overflow: hidden;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, 0.9), rgba(26, 42, 108, 0.75));
        }
        .category-banner .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 28px;
        }
        .breadcrumb-custom a {
            color: rgba(255, 255, 255, 0.75);
            transition: var(--transition);
        }
        .breadcrumb-custom a:hover {
            color: #fff;
        }
        .breadcrumb-custom .sep {
            color: rgba(255, 255, 255, 0.35);
        }
        .banner-tag {
            display: inline-block;
            background: rgba(249, 115, 22, 0.18);
            border: 1px solid rgba(249, 115, 22, 0.5);
            color: #fbbf24;
            padding: 5px 16px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
        }
        .category-banner h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 18px;
        }
        .banner-desc {
            font-size: 18px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.82);
            max-width: 640px;
            margin-bottom: 36px;
        }
        .banner-stats {
            display: flex;
            gap: 48px;
            flex-wrap: wrap;
        }
        .stat-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .stat-num {
            font-size: 30px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            letter-spacing: 0.02em;
        }

        /* ========== 通用 Section ========== */
        .section {
            padding: var(--section-padding) 0;
        }
        .section-alt {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--text);
            margin-bottom: 16px;
        }
        .section-desc {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-weak);
            max-width: 720px;
            margin-bottom: 44px;
        }
        .text-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== 概览 Split ========== */
        .intro-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            position: relative;
        }
        .intro-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(15, 23, 42, 0.2));
            pointer-events: none;
        }
        .intro-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: var(--transition);
        }
        .intro-image:hover img {
            transform: scale(1.02);
        }
        .intro-content {
            display: flex;
            flex-direction: column;
            gap: 22px;
        }
        .intro-content .section-title {
            margin-bottom: 4px;
        }
        .intro-text {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-weak);
        }
        .intro-feature-list {
            list-style: none;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .intro-feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            line-height: 1.7;
            color: var(--text);
        }
        .intro-feature-list li i {
            color: var(--accent);
            font-size: 18px;
            margin-top: 3px;
            flex-shrink: 0;
            width: 22px;
            text-align: center;
        }
        .intro-feature-list li strong {
            font-weight: 600;
            color: var(--text);
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 28px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            transition: var(--transition);
            align-self: flex-start;
        }
        .btn-primary-custom:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.3);
        }

        /* ========== 卡片网格 ========== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .insight-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 26px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            height: 100%;
        }
        .insight-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .insight-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .insight-card:hover::before {
            opacity: 1;
        }
        .insight-card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(26, 42, 108, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 22px;
            transition: var(--transition);
        }
        .insight-card:hover .card-icon {
            background: var(--primary);
            color: #fff;
        }
        .insight-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .insight-card p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-weak);
            margin-bottom: 0;
        }

        /* ========== 内容列表 ========== */
        .content-list-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .content-list-item {
            display: flex;
            gap: 24px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px;
            transition: var(--transition);
            align-items: center;
        }
        .content-list-item:hover {
            background: #fff;
            border-color: transparent;
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .content-list-item .cover-wrap {
            width: 170px;
            height: 130px;
            border-radius: 12px;
            overflow: hidden;
            flex-shrink: 0;
            position: relative;
        }
        .content-list-item .cover-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .content-list-item:hover .cover-wrap img {
            transform: scale(1.06);
        }
        .content-info {
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }
        .content-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(249, 115, 22, 0.1);
            padding: 3px 12px;
            border-radius: 20px;
            align-self: flex-start;
            letter-spacing: 0.02em;
        }
        .content-info h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 0;
            color: var(--text);
            transition: var(--transition);
        }
        .content-list-item:hover .content-info h3 {
            color: var(--primary);
        }
        .content-info p {
            font-size: 14px;
            line-height: 1.65;
            color: var(--text-weak);
            margin-bottom: 0;
        }
        .content-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-weak);
            margin-top: auto;
        }
        .content-meta i {
            margin-right: 4px;
            font-size: 12px;
        }

        /* ========== 流程 ========== */
        .process-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: #fff;
        }
        .process-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 23, 42, 0.92);
        }
        .process-section .container {
            position: relative;
            z-index: 1;
        }
        .process-section .section-title {
            color: #fff;
        }
        .process-section .section-desc {
            color: rgba(255, 255, 255, 0.65);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 50px;
        }
        .process-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius);
            padding: 30px 26px;
            transition: var(--transition);
            position: relative;
        }
        .process-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
            border-color: rgba(249, 115, 22, 0.5);
        }
        .step-num {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: #fbbf24;
            background: rgba(249, 115, 22, 0.15);
            padding: 3px 12px;
            border-radius: 20px;
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }
        .process-item h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }
        .process-item p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 0;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(26, 42, 108, 0.25);
            box-shadow: var(--shadow);
        }
        .faq-item details {
            padding: 0;
        }
        .faq-item summary {
            padding: 22px 30px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            color: var(--text);
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            color: var(--primary);
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 14px;
            color: var(--text-weak);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item details[open] summary::after {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-item .faq-body {
            padding: 0 30px 26px;
            font-size: 15px;
            line-height: 1.85;
            color: var(--text-weak);
            border-top: 1px solid var(--border);
            padding-top: 18px;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 80px 0;
            background: #fff;
        }
        .cta-banner {
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, 0.88), rgba(26, 42, 108, 0.82));
        }
        .cta-content {
            position: relative;
            z-index: 1;
        }
        .cta-banner h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }
        .cta-banner p {
            font-size: 16px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.78);
            max-width: 600px;
            margin: 0 auto 30px;
        }
        .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            border: none;
            padding: 14px 36px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 700;
            transition: var(--transition);
        }
        .btn-accent:hover {
            background: #fff;
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
        }
        .btn-accent:focus-visible {
            outline: 3px solid rgba(249, 115, 22, 0.5);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        .footer-brand {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.01em;
        }
        .footer-brand i {
            color: var(--accent);
            font-size: 22px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.5);
            max-width: 360px;
            margin-bottom: 0;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }
        .footer-links {
            list-style: none;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-contact-list {
            list-style: none;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .footer-contact-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-contact-list li i {
            color: var(--accent);
            margin-top: 4px;
            width: 18px;
            text-align: center;
            flex-shrink: 0;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .intro-split {
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 64px;
            }
            .section {
                padding: 64px 0;
            }
            .category-banner {
                padding: 72px 0 56px;
                background-attachment: scroll;
            }
            .category-banner h1 {
                font-size: 32px;
            }
            .banner-desc {
                font-size: 16px;
            }
            .banner-stats {
                gap: 24px;
            }
            .stat-num {
                font-size: 24px;
            }
            .section-title {
                font-size: 28px;
            }
            .intro-split {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro-image img {
                height: 280px;
            }
            .content-list-grid {
                grid-template-columns: 1fr;
            }
            .content-list-item {
                flex-direction: column;
                align-items: stretch;
            }
            .content-list-item .cover-wrap {
                width: 100%;
                height: 180px;
            }
            .header-inner {
                flex-wrap: wrap;
                height: auto;
                padding: 14px 0;
                gap: 12px;
            }
            .nav-tabs {
                order: 3;
                width: 100%;
                justify-content: flex-start;
                padding: 4px;
                border-radius: 12px;
            }
            .nav-tab {
                padding: 7px 16px;
                font-size: 13px;
            }
            .header-cta {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-banner {
                padding: 40px 24px;
            }
            .cta-banner h2 {
                font-size: 24px;
            }
            .process-section {
                background-attachment: scroll;
            }
            .faq-item summary {
                padding: 18px 22px;
            }
            .faq-item .faq-body {
                padding: 0 22px 22px;
                padding-top: 16px;
            }
        }

        @media (max-width: 520px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .brand {
                font-size: 18px;
            }
            .brand i {
                font-size: 18px;
            }
            .nav-tab {
                padding: 6px 14px;
                font-size: 13px;
            }
            .banner-stats {
                gap: 16px;
            }
            .stat-item {
                min-width: calc(50% - 8px);
            }
            .cta-banner {
                border-radius: 16px;
                padding: 32px 20px;
            }
            .btn-accent {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: article */
:root {
            --primary: #1d4e6b;
            --primary-dark: #143a52;
            --accent: #d99a3d;
            --accent-light: #f0c987;
            --bg-body: #f7f4ef;
            --bg-soft: #efe8dd;
            --bg-deep: #102a38;
            --text-main: #213647;
            --text-muted: #6c7d8a;
            --border-line: #e5ddd0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-card: 0 10px 35px rgba(16, 42, 56, 0.08);
            --shadow-hover: 0 16px 45px rgba(16, 42, 56, 0.14);
            --transition: all 0.3s ease;
            --spacer-section: 100px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-main);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
        }

        a {
            color: var(--primary);
            transition: var(--transition);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .btn-brand {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            background: var(--primary);
            color: #fff;
            border: 0;
            border-radius: 999px;
            font-weight: 600;
            font-size: 15px;
            text-decoration: none;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(29, 78, 107, 0.18);
        }

        .btn-brand:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(29, 78, 107, 0.28);
        }

        .btn-brand:active {
            transform: translateY(0);
        }

        .btn-brand:focus-visible,
        .btn-ghost:focus-visible,
        .nav-tab:focus-visible {
            outline: 3px solid rgba(217, 154, 61, 0.5);
            outline-offset: 2px;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            background: transparent;
            border: 1px solid var(--border-line);
            border-radius: 999px;
            font-weight: 600;
            font-size: 14px;
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        .btn-ghost:hover {
            border-color: var(--primary);
            background: rgba(29, 78, 107, 0.06);
            transform: translateY(-1px);
            color: var(--primary);
        }

        .btn-brand.btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
        }

        .btn-brand.btn-light:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 14px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-line);
        }

        .header-inner {
            display: flex;
            align-items: center;
            gap: 30px;
            padding: 16px 0;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            white-space: nowrap;
        }

        .brand i {
            font-size: 22px;
            color: var(--accent);
        }

        .brand:hover {
            color: var(--primary);
        }

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: auto;
            background: var(--bg-soft);
            padding: 5px;
            border-radius: 999px;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 9px 22px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-muted);
            text-decoration: none;
            white-space: nowrap;
            transition: var(--transition);
        }

        .nav-tab:hover {
            color: var(--primary);
            background: rgba(255, 255, 255, 0.75);
        }

        .nav-tab.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(29, 78, 107, 0.25);
        }

        .header-cta {
            display: flex;
            align-items: center;
        }

        .article-hero {
            position: relative;
            padding: 90px 0 70px;
            background: linear-gradient(135deg, rgba(16, 42, 56, 0.92), rgba(29, 78, 107, 0.84)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            color: #fff;
            border-bottom: 4px solid var(--accent);
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 22px;
        }

        .breadcrumb-nav a {
            color: rgba(255, 255, 255, 0.85);
            text-decoration: none;
        }

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

        .breadcrumb-nav i {
            font-size: 12px;
            opacity: 0.7;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
            margin-bottom: 18px;
        }

        .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent);
            color: #fff;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 700;
            padding: 6px 16px;
        }

        .category-badge i {
            font-size: 14px;
        }

        .meta-date {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }

        .meta-date i {
            margin-right: 6px;
        }

        .article-hero h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.3;
            color: #fff;
            max-width: 840px;
            margin: 0 0 16px;
        }

        .article-desc {
            font-size: 17px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.78);
            max-width: 760px;
            margin: 0;
        }

        .article-body-section {
            padding: 70px 0 90px;
            background: var(--bg-body);
        }

        .article-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 48px 52px;
            border: 1px solid var(--border-line);
            box-shadow: var(--shadow-card);
        }

        .article-content {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-main);
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 800;
            color: var(--primary);
            margin: 40px 0 18px;
        }

        .article-content h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin: 32px 0 16px;
        }

        .article-content h4 {
            font-size: 18px;
            font-weight: 700;
            margin: 24px 0 12px;
        }

        .article-content p {
            margin-bottom: 22px;
        }

        .article-content img {
            max-width: 100%;
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-card);
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 22px;
            padding-left: 24px;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--bg-soft);
            padding: 20px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 28px 0;
            color: var(--text-muted);
            font-style: italic;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border-line);
            padding: 12px 14px;
            text-align: left;
        }

        .article-content th {
            background: var(--bg-soft);
            font-weight: 700;
        }

        .article-content pre {
            background: var(--bg-deep);
            color: #e8e8e8;
            border-radius: var(--radius-sm);
            padding: 18px 20px;
            overflow-x: auto;
            margin-bottom: 22px;
            line-height: 1.6;
        }

        .article-content code {
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
            font-size: 14px;
        }

        .article-not-found {
            text-align: center;
            padding: 70px 20px;
        }

        .article-not-found i {
            font-size: 52px;
            color: var(--accent);
            margin-bottom: 20px;
        }

        .article-not-found h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .article-not-found p {
            font-size: 16px;
            color: var(--text-muted);
            margin-bottom: 28px;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 28px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-soft);
            border-radius: 999px;
            padding: 7px 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
        }

        .tag i {
            color: var(--accent);
        }

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 100px;
        }

        .sidebar-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid var(--border-line);
            box-shadow: var(--shadow-card);
        }

        .sidebar-card-title {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 14px;
        }

        .sidebar-card-title i {
            color: var(--accent);
            font-size: 18px;
        }

        .sidebar-card p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-muted);
            margin-bottom: 18px;
        }

        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar-nav li {
            border-bottom: 1px solid var(--border-line);
            padding: 11px 0;
        }

        .sidebar-nav li:last-child {
            border-bottom: 0;
            padding-bottom: 0;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: var(--text-main);
            text-decoration: none;
            font-weight: 500;
            font-size: 15px;
            transition: var(--transition);
        }

        .sidebar-nav a i {
            font-size: 12px;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .sidebar-nav a:hover {
            color: var(--accent);
            padding-left: 6px;
        }

        .sidebar-nav a:hover i {
            color: var(--accent);
            transform: translateX(3px);
        }

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

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 50px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            border-radius: 999px;
            padding: 6px 18px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            margin: 0 0 12px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
        }

        .related-card {
            display: block;
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            text-decoration: none;
            border: 1px solid var(--border-line);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            height: 100%;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(29, 78, 107, 0.2);
        }

        .related-cover {
            height: 180px;
            overflow: hidden;
            background: var(--bg-soft);
        }

        .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .related-body {
            padding: 24px;
        }

        .related-cat {
            display: inline-block;
            background: var(--bg-soft);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            padding: 4px 12px;
            margin-bottom: 10px;
        }

        .related-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            color: var(--text-main);
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-date {
            font-size: 13px;
            color: var(--text-muted);
        }

        .related-date i {
            margin-right: 4px;
            color: var(--accent);
        }

        .related-empty {
            text-align: center;
            padding: 40px;
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-line);
            color: var(--text-muted);
            font-size: 15px;
        }

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

        .faq-grid {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border-line);
            border-radius: var(--radius-md);
            padding: 26px 30px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .faq-q {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .faq-q i {
            color: var(--accent);
            font-size: 18px;
        }

        .faq-a {
            font-size: 15px;
            line-height: 1.85;
            color: var(--text-muted);
            padding-left: 28px;
        }

        .cta-section {
            padding: 90px 0;
            background: linear-gradient(135deg, var(--bg-deep), var(--primary-dark));
        }

        .cta-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            padding: 50px 55px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            backdrop-filter: blur(4px);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
        }

        .cta-card-text h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 800;
            margin: 0 0 12px;
        }

        .cta-card-text p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 16px;
            line-height: 1.7;
            margin: 0;
        }

        .cta-card-action {
            flex-shrink: 0;
        }

        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.7);
            padding: 70px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 48px;
            margin-bottom: 50px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand i {
            color: var(--accent);
            font-size: 22px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
            margin: 0;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            text-decoration: none;
            font-size: 14px;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-contact-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-contact-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 12px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-contact-list i {
            color: var(--accent);
            margin-top: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        @media (max-width: 1024px) {
            .container {
                max-width: 100%;
            }

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

            .cta-card {
                flex-direction: column;
                text-align: center;
                padding: 40px;
            }

            .cta-card-action {
                width: 100%;
                display: flex;
                justify-content: center;
            }

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

        @media (max-width: 768px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }

            .header-inner {
                gap: 14px;
                padding: 12px 0;
            }

            .brand {
                font-size: 18px;
            }

            .nav-tabs {
                margin-left: 0;
                flex: 1;
            }

            .nav-tab {
                padding: 8px 16px;
                font-size: 14px;
            }

            .header-cta {
                display: none;
            }

            .article-hero {
                padding: 60px 0 45px;
            }

            .article-hero h1 {
                font-size: 26px;
            }

            .article-desc {
                font-size: 15px;
            }

            .article-body-section {
                padding: 45px 0 65px;
            }

            .article-card {
                padding: 28px 22px;
            }

            .article-content {
                font-size: 16px;
            }

            .article-content h2 {
                font-size: 22px;
            }

            .article-content h3 {
                font-size: 19px;
            }

            .article-content blockquote {
                padding: 16px 18px;
            }

            .article-sidebar {
                position: static;
                margin-top: 32px;
            }

            .related-section {
                padding: 60px 0;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .faq-section {
                padding: 60px 0;
            }

            .faq-item {
                padding: 22px 20px;
            }

            .faq-q {
                font-size: 16px;
            }

            .faq-a {
                padding-left: 0;
                font-size: 14px;
            }

            .cta-section {
                padding: 60px 0;
            }

            .cta-card {
                padding: 32px 22px;
            }

            .cta-card-text h2 {
                font-size: 22px;
            }

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

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

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .brand {
                font-size: 16px;
            }

            .brand i {
                font-size: 18px;
            }

            .nav-tab {
                padding: 7px 14px;
                font-size: 13px;
            }

            .article-hero h1 {
                font-size: 22px;
            }

            .article-card {
                padding: 22px 16px;
            }

            .article-content {
                font-size: 15px;
            }

            .article-content h2 {
                font-size: 20px;
            }

            .related-cover {
                height: 150px;
            }

            .related-body {
                padding: 18px;
            }

            .related-body h3 {
                font-size: 16px;
            }

            .section-head {
                margin-bottom: 36px;
            }

            .cta-card {
                padding: 26px 18px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2D5B4C;
            --primary-dark: #1E3D33;
            --primary-light: #E8F0EC;
            --accent: #D4A853;
            --accent-light: #F5EDDC;
            --dark-bg: #10241E;
            --body-bg: #FFFFFF;
            --section-alt: #F6F8F7;
            --text-main: #1F2A26;
            --text-muted: #5A6E66;
            --border: #E4EBE7;
            --radius: 16px;
            --radius-sm: 8px;
            --shadow: 0 12px 36px rgba(30, 61, 51, 0.08);
            --shadow-lg: 0 20px 48px rgba(30, 61, 51, 0.14);
            --space-section: 100px;
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background-color: var(--body-bg);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        img {
            max-width: 100%;
            height: auto;
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header ===== */
        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 14px 0;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .brand i {
            color: var(--accent);
            font-size: 1.2rem;
        }

        .nav-tabs {
            display: flex;
            gap: 4px;
            background: var(--section-alt);
            border-radius: 40px;
            padding: 5px;
            border: 1px solid var(--border);
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 24px;
            border-radius: 30px;
            font-size: 0.93rem;
            font-weight: 600;
            color: var(--text-muted);
            white-space: nowrap;
            transition: var(--transition);
        }

        .nav-tab:hover {
            color: var(--primary);
            background: rgba(45, 91, 76, 0.06);
        }

        .nav-tab.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(45, 91, 76, 0.25);
        }

        .header-cta .btn-brand {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-dark);
            color: #fff;
            border: none;
            padding: 10px 24px;
            border-radius: 30px;
            font-size: 0.92rem;
            font-weight: 600;
            transition: var(--transition);
        }

        .header-cta .btn-brand:hover {
            background: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(45, 91, 76, 0.3);
            color: #fff;
        }

        /* ===== Hero / Page Banner ===== */
        .page-banner {
            position: relative;
            background: linear-gradient(135deg, var(--primary-dark) 0%, #193629 60%, #234A3B 100%);
            padding: 110px 0 120px;
            color: #fff;
            overflow: hidden;
        }

        .page-banner::before {
            content: "";
            position: absolute;
            top: -40%;
            right: -10%;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(212, 168, 83, 0.18) 0%, transparent 60%);
            border-radius: 50%;
            z-index: 1;
        }

        .page-banner::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 6px;
            background: linear-gradient(90deg, var(--accent), var(--primary), var(--accent));
            opacity: 0.7;
        }

        .page-banner .banner-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.15;
            z-index: 0;
        }

        .page-banner .banner-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }

        .page-banner .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(212, 168, 83, 0.2);
            border: 1px solid rgba(212, 168, 83, 0.35);
            color: var(--accent);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .page-banner h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 18px;
        }

        .page-banner .banner-lead {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin-bottom: 30px;
            line-height: 1.7;
        }

        .banner-stats {
            display: flex;
            gap: 40px;
            margin-top: 40px;
        }

        .banner-stats .stat-item {
            border-left: 2px solid var(--accent);
            padding-left: 16px;
        }

        .banner-stats .stat-num {
            font-size: 1.9rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .banner-stats .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        /* ===== Section 通用 ===== */
        .section {
            padding: var(--space-section) 0;
        }

        .section-alt {
            background: var(--section-alt);
        }

        .section-head {
            margin-bottom: 54px;
        }

        .section-head .section-tag {
            display: inline-block;
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            background: var(--primary-light);
            padding: 6px 16px;
            border-radius: 30px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 2.3rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--primary-dark);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .section-head p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 720px;
        }

        .section-head.center {
            text-align: center;
        }

        .section-head.center p {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 实验流程 ===== */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .flow-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 32px 26px;
            border: 1px solid var(--border);
            position: relative;
            transition: var(--transition);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
        }

        .flow-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: rgba(45, 91, 76, 0.2);
        }

        .flow-card .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            margin-bottom: 16px;
        }

        .flow-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

        .flow-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* ===== 方法论卡片 ===== */
        .method-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 30px 28px;
            border: 1px solid var(--border);
            transition: var(--transition);
            height: 100%;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
        }

        .method-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: rgba(45, 91, 76, 0.2);
        }

        .method-card .icon-wrap {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 1.3rem;
            margin-bottom: 18px;
        }

        .method-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

        .method-card p {
            font-size: 0.93rem;
            color: var(--text-muted);
            margin-bottom: 14px;
            line-height: 1.7;
        }

        .method-card .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .method-card .tag-list .tag {
            background: var(--section-alt);
            color: var(--text-muted);
            font-size: 0.78rem;
            padding: 4px 10px;
            border-radius: 20px;
            font-weight: 500;
        }

        /* ===== 案例卡片 ===== */
        .case-card {
            border-radius: var(--radius);
            overflow: hidden;
            background: #fff;
            border: 1px solid var(--border);
            transition: var(--transition);
            height: 100%;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
        }

        .case-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: rgba(45, 91, 76, 0.15);
        }

        .case-card .card-cover {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
        }

        .case-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .case-card:hover .card-cover img {
            transform: scale(1.04);
        }

        .case-card .card-cover .cover-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, transparent 50%, rgba(16, 36, 30, 0.65));
        }

        .case-card .cover-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(16, 36, 30, 0.8);
            backdrop-filter: blur(6px);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .case-card .card-body-custom {
            padding: 24px 26px 28px;
        }

        .case-card .case-metrics {
            display: flex;
            gap: 24px;
            margin-bottom: 14px;
        }

        .case-card .case-metrics .metric-num {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .case-card .case-metrics .metric-label {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .case-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

        .case-card .case-desc {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.7;
        }

        .case-card .case-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .case-card .case-tags .tag {
            background: var(--accent-light);
            color: #8A6A2E;
            font-size: 0.78rem;
            padding: 4px 10px;
            border-radius: 20px;
            font-weight: 500;
        }

        /* ===== 数据面板 ===== */
        .data-section {
            background: var(--dark-bg);
            color: #fff;
            border-radius: var(--radius);
            padding: 56px 48px;
            position: relative;
            overflow: hidden;
        }

        .data-section::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(212, 168, 83, 0.2), transparent 70%);
            border-radius: 50%;
        }

        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            z-index: 1;
        }

        .data-item .data-num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }

        .data-item .data-label {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(45, 91, 76, 0.3);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
        }

        .faq-item summary {
            padding: 22px 28px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--primary-dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            list-style: none;
            gap: 16px;
        }

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

        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--accent);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-item .faq-body {
            padding: 0 28px 22px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.75;
        }

        /* ===== CTA ===== */
        .cta-band {
            background: linear-gradient(120deg, var(--primary-dark), var(--primary));
            border-radius: var(--radius);
            padding: 60px 64px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-band::after {
            content: "";
            position: absolute;
            bottom: -60px;
            right: 40px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(212, 168, 83, 0.25), transparent 70%);
            border-radius: 50%;
        }

        .cta-band h2 {
            font-size: 2.1rem;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-band p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin-bottom: 26px;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: #fff;
            color: var(--primary-dark);
            border: none;
            font-weight: 700;
            padding: 13px 32px;
            border-radius: 30px;
            transition: var(--transition);
        }

        .btn-white:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
            color: var(--primary-dark);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            font-weight: 600;
            padding: 13px 32px;
            border-radius: 30px;
            transition: var(--transition);
        }

        .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0D1F1A;
            color: rgba(255, 255, 255, 0.75);
            padding: 70px 0 30px;
            margin-top: 80px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 48px;
            margin-bottom: 50px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand i {
            color: var(--accent);
        }

        .footer-desc {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
            line-height: 1.7;
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.92rem;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-contact-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-contact-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 12px;
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-contact-list i {
            color: var(--accent);
            margin-top: 5px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .page-banner h1 {
                font-size: 2.6rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 70px;
            }
            .header-inner {
                flex-wrap: wrap;
                justify-content: center;
                gap: 12px;
            }
            .brand {
                width: 100%;
                justify-content: center;
            }
            .nav-tabs {
                width: 100%;
                justify-content: center;
                overflow-x: auto;
                border-radius: 30px;
            }
            .nav-tab {
                padding: 8px 18px;
                font-size: 0.85rem;
                flex-shrink: 0;
            }
            .header-cta {
                display: none;
            }
            .page-banner {
                padding: 70px 0 80px;
            }
            .page-banner h1 {
                font-size: 2.1rem;
            }
            .banner-stats {
                gap: 24px;
                flex-wrap: wrap;
            }
            .section-head h2 {
                font-size: 1.7rem;
            }
            .cta-band {
                padding: 40px 28px;
            }
            .cta-band h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .data-section {
                padding: 40px 28px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }
            .nav-tab {
                padding: 7px 14px;
                font-size: 0.8rem;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .banner-stats .stat-num {
                font-size: 1.4rem;
            }
            .flow-grid {
                grid-template-columns: 1fr;
            }
            .data-grid {
                grid-template-columns: 1fr;
            }
            .section-head p {
                font-size: 0.95rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .case-card .card-body-custom {
                padding: 18px 18px 22px;
            }
        }