/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #5A8FE0;
            --primary-dark: #4a7bc8;
            --secondary: #2ecc71;
            --secondary-dark: #27ae60;
            --accent: #f39c12;
            --accent-dark: #e67e22;
            --bg: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #2c3e50;
            --bg-dark-light: #34495e;
            --text: #1a1a2e;
            --text-light: #5a6a7a;
            --text-white: #f0f4f8;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-xs: 6px;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
            --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.16);
            --transition: all 0.3s ease;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --nav-height: 64px;
            --nav-height-scroll: 56px;
            --section-gap: 4rem;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-family);
            color: var(--text);
            background: var(--bg);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); text-decoration: none; }
        a:focus { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 2px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; padding: 0; margin: 0; }
        button, input, textarea { font-family: var(--font-family); }
        button { cursor: pointer; border: none; background: none; }
        input:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(90, 143, 224, 0.15); }

        /* ===== Container ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .section-padding { padding: var(--section-gap) 0; }

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text); }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 1.8rem; margin-bottom: 1.2rem; }
        h3 { font-size: 1.2rem; margin-bottom: 0.6rem; }
        .section-title {
            text-align: center;
            margin-bottom: 2.5rem;
            position: relative;
        }
        .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 0.8rem auto 0;
        }
        .text-weak { color: var(--text-light); font-size: 0.9rem; }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
            height: var(--nav-height);
        }
        .site-header.scrolled {
            height: var(--nav-height-scroll);
            background: rgba(255, 255, 255, 0.97);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            padding: 0 1.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
        }
        .brand-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.5px;
        }
        .brand-text span { color: var(--primary); }
        .brand-sub {
            font-size: 0.75rem;
            color: var(--text-light);
            margin-left: 0.2rem;
            font-weight: 400;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 0.2rem;
        }
        .nav-main a {
            display: inline-flex;
            align-items: center;
            padding: 0.4rem 0.9rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .nav-main a:hover { color: var(--primary); background: rgba(90, 143, 224, 0.08); }
        .nav-main a.active { color: var(--primary); background: rgba(90, 143, 224, 0.12); }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .search-wrap {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 0.2rem 0.2rem 0.2rem 1rem;
            transition: var(--transition);
        }
        .search-wrap:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(90, 143, 224, 0.12);
        }
        .search-wrap input {
            border: none;
            background: transparent;
            padding: 0.35rem 0;
            font-size: 0.85rem;
            width: 140px;
            color: var(--text);
        }
        .search-wrap input::placeholder { color: #aab; }
        .search-wrap button {
            padding: 0.35rem 0.8rem;
            color: var(--text-light);
            font-size: 0.85rem;
            border-radius: 20px;
            transition: var(--transition);
        }
        .search-wrap button:hover { color: var(--primary); }
        .hot-tags {
            display: flex;
            gap: 0.4rem;
            align-items: center;
        }
        .hot-tags a {
            font-size: 0.75rem;
            padding: 0.2rem 0.6rem;
            border-radius: 12px;
            background: rgba(90, 143, 224, 0.08);
            color: var(--primary);
            font-weight: 500;
            transition: var(--transition);
            white-space: nowrap;
        }
        .hot-tags a:hover { background: var(--primary); color: #fff; }
        .mobile-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--text);
            padding: 0.4rem;
            border-radius: var(--radius-xs);
        }
        .mobile-toggle:hover { background: var(--bg); }

        /* ===== Hero ===== */
        .hero {
            min-height: 88vh;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(135deg, rgba(90, 143, 224, 0.75), rgba(46, 204, 113, 0.3)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            margin-top: var(--nav-height);
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(90, 143, 224, 0.7), rgba(46, 204, 113, 0.25));
            z-index: 1;
        }
        .hero .container-custom { position: relative; z-index: 2; width: 100%; }
        .hero-content { max-width: 700px; padding: 3rem 0; }
        .hero h1 {
            font-size: 3rem;
            color: #fff;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .hero h1 span { color: #ffd700; }
        .hero-sub {
            font-size: 1.25rem;
            color: rgba(255, 255, 255, 0.92);
            margin-bottom: 2rem;
            line-height: 1.6;
            text-shadow: 0 1px 8px rgba(0, 0, 0, 0.15);
            max-width: 560px;
        }
        .hero-actions {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2.2rem;
            background: #fff;
            color: var(--primary);
            font-size: 1.05rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
            border: 2px solid transparent;
        }
        .btn-primary-custom:hover {
            background: var(--secondary);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(46, 204, 113, 0.4);
        }
        .btn-primary-custom:active { transform: scale(0.97); }
        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2.2rem;
            background: transparent;
            color: #fff;
            font-size: 1.05rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            border: 2px solid rgba(255, 255, 255, 0.7);
        }
        .btn-secondary-custom:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            transform: translateY(-3px);
        }
        .btn-secondary-custom:active { transform: scale(0.97); }
        .hero-stats {
            display: flex;
            gap: 2.5rem;
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
        }
        .hero-stat-item { text-align: center; }
        .hero-stat-num {
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.75);
        }

        /* ===== Feature Cards (卖点三连) ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 2rem 1.5rem 1.8rem;
            text-align: center;
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 1rem;
            background: linear-gradient(135deg, rgba(90, 143, 224, 0.12), rgba(46, 204, 113, 0.12));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
        }
        .feature-card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
        .feature-card p { font-size: 0.92rem; color: var(--text-light); line-height: 1.6; }

        /* ===== Scene Showcase (场景演示) ===== */
        .scene-row {
            display: flex;
            align-items: center;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .scene-row:last-child { margin-bottom: 0; }
        .scene-row.reverse { flex-direction: row-reverse; }
        .scene-img-wrap {
            flex: 1;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .scene-img-wrap img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            transition: var(--transition);
        }
        .scene-img-wrap:hover img { transform: scale(1.03); }
        .scene-text {
            flex: 1;
            padding: 0.5rem 0;
        }
        .scene-text h3 { font-size: 1.4rem; margin-bottom: 0.8rem; }
        .scene-text p { color: var(--text-light); line-height: 1.7; margin-bottom: 0.8rem; }
        .scene-tag {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(90, 143, 224, 0.1);
            color: var(--primary);
            margin-right: 0.4rem;
            margin-bottom: 0.3rem;
        }

        /* ===== Social Proof ===== */
        .proof-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .proof-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 1.8rem;
            border-left: 4px solid var(--primary);
            transition: var(--transition);
        }
        .proof-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
        .proof-quote {
            font-size: 0.95rem;
            color: var(--text);
            line-height: 1.7;
            margin-bottom: 1rem;
            font-style: italic;
        }
        .proof-author {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .proof-avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
        }
        .proof-name { font-weight: 600; font-size: 0.9rem; }
        .proof-role { font-size: 0.78rem; color: var(--text-light); }
        .proof-stats {
            display: flex;
            justify-content: center;
            gap: 3rem;
            margin-top: 2.5rem;
            padding: 1.5rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .proof-stat { text-align: center; }
        .proof-stat-num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
        }
        .proof-stat-label {
            font-size: 0.85rem;
            color: var(--text-light);
        }

        /* ===== Latest News (CMS) ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.8rem;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            border: 1px solid var(--border);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .news-card-img {
            height: 180px;
            overflow: hidden;
            background: var(--bg);
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .news-card:hover .news-card-img img { transform: scale(1.05); }
        .news-card-body { padding: 1.2rem 1.2rem 1.4rem; flex: 1; display: flex; flex-direction: column; }
        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            margin-bottom: 0.5rem;
            font-size: 0.78rem;
            color: var(--text-light);
        }
        .news-card-cat {
            display: inline-block;
            padding: 0.15rem 0.6rem;
            border-radius: 10px;
            background: rgba(90, 143, 224, 0.1);
            color: var(--primary);
            font-weight: 500;
            font-size: 0.72rem;
        }
        .news-card-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.4rem;
            line-height: 1.4;
            flex: 1;
        }
        .news-card-title a { color: var(--text); }
        .news-card-title a:hover { color: var(--primary); }
        .news-card-excerpt {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 3rem 1rem;
            color: var(--text-light);
            font-size: 1rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .news-more-wrap {
            text-align: center;
            margin-top: 2rem;
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.6rem 1.8rem;
            border: 2px solid var(--primary);
            color: var(--primary);
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .btn-outline-custom:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            margin-bottom: 0.8rem;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.4rem;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question i { transition: transform 0.3s; color: var(--primary); font-size: 0.85rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 1.4rem;
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 1.4rem 1.2rem;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            padding: 4rem 0;
            text-align: center;
            color: #fff;
            border-radius: 0;
            margin: 0;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 0.6rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.88);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto 1.8rem;
        }
        .cta-section .btn-primary-custom {
            background: #fff;
            color: var(--primary);
            font-size: 1.1rem;
            padding: 0.9rem 2.8rem;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.15);
        }
        .cta-section .btn-primary-custom:hover {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 8px 32px rgba(243, 156, 18, 0.4);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 3rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 2rem;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }
        .footer-col p, .footer-col a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.8;
        }
        .footer-col a:hover { color: var(--primary); }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 0.8rem;
        }
        .footer-brand .brand-icon { width: 32px; height: 32px; font-size: 0.9rem; }
        .footer-brand-text {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
        }
        .footer-social {
            display: flex;
            gap: 0.8rem;
            margin-top: 1rem;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.2rem 0;
            margin-top: 2rem;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a { color: rgba(255, 255, 255, 0.55); }
        .footer-bottom a:hover { color: var(--primary); }

        /* ===== Mobile Bottom Bar ===== */
        .mobile-cta-bar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            z-index: 999;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(8px);
            border-top: 1px solid var(--border);
            padding: 0.6rem 1rem;
            align-items: center;
            justify-content: space-between;
            gap: 0.8rem;
        }
        .mobile-cta-bar .bar-text {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text);
        }
        .mobile-cta-bar .bar-btn {
            padding: 0.5rem 1.4rem;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            white-space: nowrap;
            transition: var(--transition);
        }
        .mobile-cta-bar .bar-btn:hover { background: var(--secondary); }

        /* ===== Responsive ===== */
        @media (max-width: 64em) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .scene-row { flex-direction: column !important; gap: 1.5rem; }
            .scene-img-wrap img { height: 240px; }
        }
        @media (max-width: 52em) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.5rem; }
            .hero h1 { font-size: 2.2rem; }
            .hero-sub { font-size: 1rem; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .proof-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .hero-stats { flex-wrap: wrap; gap: 1.2rem; }
            .nav-main { display: none; }
            .mobile-toggle { display: block; }
            .search-wrap input { width: 100px; }
            .hot-tags { display: none; }
            .mobile-cta-bar { display: flex; }
            body { padding-bottom: 60px; }
            .footer-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 40em) {
            :root { --section-gap: 2.5rem; }
            h1 { font-size: 1.8rem; }
            .hero h1 { font-size: 1.7rem; }
            .hero { min-height: 70vh; }
            .features-grid { grid-template-columns: 1fr; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn-primary-custom,
            .hero-actions .btn-secondary-custom { width: 100%; justify-content: center; }
            .hero-stats { flex-direction: column; gap: 1rem; }
            .proof-stats { flex-direction: column; gap: 1rem; }
            .cta-section h2 { font-size: 1.5rem; }
            .brand-sub { display: none; }
            .search-wrap input { width: 80px; }
            .search-wrap { padding-left: 0.6rem; }
            .news-card-img { height: 140px; }
        }
        /* Mobile nav overlay (simple) */
        .mobile-nav-open .nav-main {
            display: flex;
            flex-direction: column;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            padding: 1rem;
            box-shadow: var(--shadow-lg);
            z-index: 999;
            gap: 0.3rem;
        }
        .mobile-nav-open .nav-main a { padding: 0.7rem 1rem; font-size: 1rem; width: 100%; }
        .mobile-nav-open .nav-main a.active::after { display: none; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #5A8FE0;
            --primary-dark: #4a7bc8;
            --secondary: #2ecc71;
            --accent: #f39c12;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #2c3e50;
            --bg-footer: #1a2633;
            --text-dark: #1a2a3a;
            --text-main: #2c3e50;
            --text-light: #6b7c93;
            --text-white: #ffffff;
            --border-light: #e8edf3;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-family);
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; padding: 0; margin: 0; }

        /* ===== Container ===== */
        .container-custom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
            width: 100%;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            transition: all var(--transition);
            height: var(--header-height);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 20px rgba(0,0,0,0.08);
            height: 60px;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            padding: 0 1.5rem;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-dark);
            flex-shrink: 0;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
        }
        .brand-text { color: var(--text-dark); letter-spacing: 1px; }
        .brand-text span { color: var(--primary); }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-main a {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-main);
            transition: all var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            background: rgba(90,143,224,0.08);
            color: var(--primary);
        }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(90,143,224,0.12);
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .search-toggle {
            background: none;
            border: none;
            font-size: 1.2rem;
            color: var(--text-light);
            cursor: pointer;
            padding: 0.4rem;
            border-radius: 50%;
            transition: all var(--transition);
        }
        .search-toggle:hover { color: var(--primary); background: rgba(90,143,224,0.08); }

        .hot-tags {
            display: flex;
            gap: 0.4rem;
            align-items: center;
        }
        .hot-tags .tag {
            display: inline-block;
            padding: 0.2rem 0.7rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(243,156,18,0.12);
            color: var(--accent);
            transition: all var(--transition);
        }
        .hot-tags .tag:hover { background: var(--accent); color: #fff; }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 0.3rem;
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            margin-top: var(--header-height);
            padding: 5rem 0 4rem;
            background: linear-gradient(135deg, rgba(90,143,224,0.85), rgba(46,204,113,0.4)), url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-hero .hero-content {
            text-align: center;
            color: var(--text-white);
            max-width: 800px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            text-shadow: 0 2px 12px rgba(0,0,0,0.2);
            letter-spacing: 1px;
        }
        .page-hero p {
            font-size: 1.2rem;
            opacity: 0.92;
            margin-bottom: 1.5rem;
            line-height: 1.7;
            text-shadow: 0 1px 6px rgba(0,0,0,0.15);
        }
        .page-hero .hero-badge {
            display: inline-block;
            padding: 0.3rem 1.2rem;
            border-radius: 30px;
            background: rgba(255,255,255,0.2);
            backdrop-filter: blur(4px);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 1rem;
            border: 1px solid rgba(255,255,255,0.25);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 0.8rem 0;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb .container-custom {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .breadcrumb a { color: var(--text-light); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb .sep { color: #ccc; margin: 0 0.2rem; }
        .breadcrumb .current { color: var(--text-main); font-weight: 500; }

        /* ===== Section Common ===== */
        .section {
            padding: 4.5rem 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.6rem;
        }
        .section-title p {
            color: var(--text-light);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title .title-line {
            width: 50px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 3px;
            margin: 0.8rem auto 0;
        }
        .section-bg-light { background: #fff; }
        .section-bg-alt { background: #f0f5fa; }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 0.5rem;
        }
        .card-body p {
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.6;
            flex: 1;
        }
        .card-body .card-tag {
            display: inline-block;
            padding: 0.15rem 0.6rem;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(90,143,224,0.1);
            color: var(--primary);
            margin-bottom: 0.6rem;
            align-self: flex-start;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            padding: 0.7rem 1.8rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-align: center;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--secondary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(46,204,113,0.35);
        }
        .btn-primary:active { transform: translateY(0) scale(0.98); }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-lg { padding: 1rem 2.8rem; font-size: 1.15rem; border-radius: 10px; }
        .btn-sm { padding: 0.4rem 1.2rem; font-size: 0.85rem; }

        /* ===== Login Methods Grid ===== */
        .methods-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.8rem;
        }
        .method-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .method-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }
        .method-card .icon-circle {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: #fff;
            margin: 0 auto 1rem;
        }
        .icon-phone { background: linear-gradient(135deg, var(--primary), #7aa7e8); }
        .icon-wechat { background: linear-gradient(135deg, #2ecc71, #27ae60); }
        .icon-qq { background: linear-gradient(135deg, #f39c12, #e67e22); }
        .icon-email { background: linear-gradient(135deg, #9b59b6, #8e44ad); }
        .method-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.4rem; }
        .method-card p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 1rem; }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 2rem;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: 2rem 1.2rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            position: relative;
            transition: all var(--transition);
        }
        .step-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
        .step-card .step-num {
            counter-increment: step;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            margin: 0 auto 1rem;
        }
        .step-card h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.4rem; }
        .step-card p { font-size: 0.88rem; color: var(--text-light); }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            margin-bottom: 0.8rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-md); }
        .faq-question {
            padding: 1.2rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.8rem;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-family);
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(90,143,224,0.04); }
        .faq-question .faq-icon { color: var(--primary); font-size: 1.1rem; transition: transform var(--transition); flex-shrink: 0; }
        .faq-item.open .faq-icon { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 1.5rem;
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 1.5rem 1.2rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), #3a6fb5);
            color: #fff;
            text-align: center;
            padding: 4rem 0;
        }
        .cta-section h2 { font-size: 2rem; font-weight: 700; margin-bottom: 0.6rem; }
        .cta-section p { font-size: 1.1rem; opacity: 0.9; margin-bottom: 1.8rem; max-width: 600px; margin-left: auto; margin-right: auto; }
        .cta-section .btn { background: #fff; color: var(--primary); }
        .cta-section .btn:hover { background: var(--secondary); color: #fff; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-footer);
            color: rgba(255,255,255,0.85);
            padding: 3.5rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 2.5rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            margin-bottom: 0.8rem;
        }
        .footer-brand .brand-icon {
            width: 32px;
            height: 32px;
            font-size: 1rem;
        }
        .footer-brand-text {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
        }
        .footer-col p { font-size: 0.88rem; line-height: 1.7; color: rgba(255,255,255,0.6); margin-bottom: 0.4rem; }
        .footer-col h4 { font-size: 1rem; font-weight: 600; color: #fff; margin-bottom: 1rem; }
        .footer-col a { color: rgba(255,255,255,0.6); }
        .footer-col a:hover { color: var(--primary); }
        .footer-social { display: flex; gap: 0.8rem; margin-top: 1rem; }
        .footer-social a {
            width: 38px; height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.7);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .footer-bottom {
            padding: 1.5rem 0;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.35); }
        .footer-bottom a:hover { color: var(--primary); }

        /* ===== Responsive ===== */
        @media (max-width: 64em) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }

        @media (max-width: 52em) {
            .nav-main { display: none; }
            .mobile-toggle { display: block; }
            .hot-tags { display: none; }

            .page-hero h1 { font-size: 2rem; }
            .page-hero p { font-size: 1rem; }
            .section-title h2 { font-size: 1.6rem; }
            .methods-grid { grid-template-columns: 1fr 1fr; }
            .steps-grid { grid-template-columns: 1fr 1fr; }

            /* mobile nav overlay */
            .nav-mobile-open .nav-main {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                padding: 1rem 1.5rem 1.5rem;
                box-shadow: 0 8px 32px rgba(0,0,0,0.12);
                border-bottom: 1px solid var(--border-light);
                z-index: 999;
                gap: 0.2rem;
            }
            .nav-mobile-open .nav-main a {
                padding: 0.7rem 1rem;
                font-size: 1rem;
                width: 100%;
            }
            .nav-mobile-open .nav-main a.active::after { display: none; }
        }

        @media (max-width: 40em) {
            .page-hero { min-height: 260px; padding: 3.5rem 0 2.5rem; }
            .page-hero h1 { font-size: 1.6rem; }
            .section { padding: 3rem 0; }
            .methods-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
            .container-custom { padding: 0 1rem; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .gap-1 { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #5A8FE0;
            --primary-dark: #4a7dcc;
            --primary-light: #7ba8e8;
            --secondary: #2ecc71;
            --secondary-dark: #27ae60;
            --accent: #f39c12;
            --accent-dark: #e08e0b;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #2c3e50;
            --bg-dark-light: #34495e;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8a8aaa;
            --text-light: #ffffff;
            --border-color: #e8ecf0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
            --shadow-hover: 0 12px 32px rgba(90,143,224,0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --header-scroll-height: 56px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-family);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); text-decoration: none; }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; }
        p { margin-bottom: 0; }
        button, input, textarea { font-family: inherit; font-size: inherit; }

        /* ===== 容器 ===== */
        .container-custom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        .container-narrow {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(232,236,240,0.6);
            transition: background var(--transition), box-shadow var(--transition), height var(--transition);
            height: var(--header-height);
        }
        .site-header.scrolled {
            height: var(--header-scroll-height);
            box-shadow: 0 2px 20px rgba(0,0,0,0.06);
            background: rgba(255,255,255,0.98);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            padding: 0 24px;
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .brand-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            letter-spacing: 1px;
            box-shadow: 0 2px 8px rgba(90,143,224,0.25);
        }
        .brand-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .brand-text span { color: var(--primary); }

        /* 导航主体 */
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0 20px;
        }
        .nav-main a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: rgba(90,143,224,0.08);
        }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(90,143,224,0.12);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }

        /* 搜索与热词 */
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-wrap {
            position: relative;
            display: flex;
            align-items: center;
        }
        .search-wrap input {
            width: 180px;
            padding: 8px 36px 8px 14px;
            border: 1px solid var(--border-color);
            border-radius: 20px;
            background: var(--bg-body);
            font-size: 0.85rem;
            transition: all var(--transition);
            outline: none;
        }
        .search-wrap input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(90,143,224,0.12);
            width: 220px;
        }
        .search-wrap .search-icon {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }
        .hot-tags {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .hot-tags a {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 14px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(90,143,224,0.08);
            color: var(--primary);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .hot-tags a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }

        /* 汉堡菜单按钮 */
        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            cursor: pointer;
            border-radius: 8px;
            border: none;
            background: transparent;
            transition: background var(--transition);
        }
        .hamburger:hover { background: rgba(90,143,224,0.08); }
        .hamburger span {
            display: block;
            width: 22px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* 移动端菜单面板 */
        .mobile-menu {
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            z-index: 999;
            padding: 32px 24px;
            transform: translateY(-120%);
            opacity: 0;
            transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
            overflow-y: auto;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
        }
        .mobile-menu a {
            display: block;
            padding: 14px 20px;
            border-radius: 12px;
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--text-primary);
            transition: all var(--transition);
            text-align: center;
        }
        .mobile-menu a:hover { background: rgba(90,143,224,0.08); color: var(--primary); }
        .mobile-menu a.active { background: var(--primary); color: #fff; }
        .mobile-search {
            margin-top: 16px;
            position: relative;
        }
        .mobile-search input {
            width: 100%;
            padding: 14px 48px 14px 20px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            background: var(--bg-body);
            font-size: 1rem;
            outline: none;
        }
        .mobile-search input:focus { border-color: var(--primary); }
        .mobile-search .search-icon {
            position: absolute;
            right: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 1.1rem;
        }

        /* ===== 文章 Banner ===== */
        .article-banner {
            margin-top: var(--header-height);
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, rgba(90,143,224,0.85), rgba(46,204,113,0.5)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .article-banner .container-custom {
            position: relative;
            z-index: 2;
        }
        .article-banner .category-label {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 20px;
            background: rgba(255,255,255,0.2);
            backdrop-filter: blur(4px);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 16px;
            border: 1px solid rgba(255,255,255,0.25);
        }
        .article-banner h1 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            text-shadow: 0 2px 20px rgba(0,0,0,0.15);
            max-width: 800px;
            margin-bottom: 12px;
        }
        .article-banner .meta-line {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: rgba(255,255,255,0.85);
            font-size: 0.9rem;
        }
        .article-banner .meta-line span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-banner .meta-line i { font-size: 0.85rem; }

        /* ===== 面包屑 ===== */
        .breadcrumb-wrap {
            background: #fff;
            border-bottom: 1px solid var(--border-color);
            padding: 12px 0;
        }
        .breadcrumb-wrap .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .breadcrumb-wrap .breadcrumb a { color: var(--text-muted); }
        .breadcrumb-wrap .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb-wrap .breadcrumb .sep { color: var(--border-color); font-weight: 300; }

        /* ===== 文章正文 ===== */
        .article-main {
            padding: 48px 0 64px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 40px 48px;
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body h2, .article-body h3 {
            margin-top: 32px;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .article-body h2 { font-size: 1.5rem; color: var(--text-primary); border-bottom: 2px solid var(--border-color); padding-bottom: 8px; }
        .article-body h3 { font-size: 1.2rem; color: var(--text-secondary); }
        .article-body p { margin-bottom: 1.2rem; }
        .article-body ul, .article-body ol { margin-bottom: 1.2rem; padding-left: 24px; list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 6px; }
        .article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
        .article-body a:hover { color: var(--primary-dark); }
        .article-body img { border-radius: var(--radius-sm); margin: 24px auto; box-shadow: var(--shadow-sm); }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(90,143,224,0.05);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body code {
            background: var(--bg-body);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9rem;
            color: var(--accent-dark);
        }
        .article-body pre {
            background: #1e1e2e;
            color: #e4e4e4;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 24px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* 文章空状态 */
        .article-empty {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .article-empty .empty-icon {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            opacity: 0.5;
        }
        .article-empty h2 { font-size: 1.5rem; color: var(--text-secondary); margin-bottom: 12px; }
        .article-empty p { color: var(--text-muted); margin-bottom: 24px; }
        .article-empty .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 500;
            transition: all var(--transition);
        }
        .article-empty .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); color: #fff; }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 48px 0 64px;
            background: var(--bg-body);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .related-section .section-sub {
            text-align: center;
            color: var(--text-muted);
            margin-bottom: 36px;
            font-size: 0.95rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .thumb {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            background: var(--border-color);
        }
        .related-card .card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.4;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h3 a { color: inherit; }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 10px;
            border-top: 1px solid var(--border-color);
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .related-card .card-footer .tag {
            display: inline-block;
            padding: 2px 10px;
            border-radius: 10px;
            background: rgba(90,143,224,0.08);
            color: var(--primary);
            font-weight: 500;
            font-size: 0.72rem;
        }

        /* ===== CTA 区域 ===== */
        .article-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            padding: 48px 0;
            text-align: center;
            color: #fff;
        }
        .article-cta h2 { font-size: 1.8rem; font-weight: 700; margin-bottom: 12px; }
        .article-cta p { font-size: 1.05rem; opacity: 0.9; margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }
        .article-cta .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 44px;
            border-radius: 50px;
            background: #fff;
            color: var(--primary);
            font-weight: 600;
            font-size: 1.05rem;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(0,0,0,0.15);
        }
        .article-cta .btn-cta:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(0,0,0,0.2);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.3fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-brand .brand-icon {
            width: 34px;
            height: 34px;
            font-size: 1rem;
        }
        .footer-brand-text {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
        }
        .footer-col p { font-size: 0.88rem; line-height: 1.7; color: rgba(255,255,255,0.6); margin-bottom: 6px; }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .footer-col a { color: rgba(255,255,255,0.6); transition: color var(--transition); }
        .footer-col a:hover { color: var(--primary-light); }
        .footer-social {
            display: flex;
            gap: 10px;
            margin-top: 16px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.7);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.35); }
        .footer-bottom a:hover { color: var(--primary-light); }

        /* ===== 响应式 ===== */
        @media screen and (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .search-wrap input { width: 140px; }
            .search-wrap input:focus { width: 170px; }
            .hot-tags { display: none; }
        }

        @media screen and (max-width: 768px) {
            :root { --header-height: 64px; }
            .nav-main { display: none; }
            .hamburger { display: flex; }
            .header-actions .hot-tags { display: none; }
            .search-wrap { display: none; }
            .article-banner { padding: 60px 0 40px; min-height: 200px; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-body { padding: 24px 20px; font-size: 1rem; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .article-cta h2 { font-size: 1.4rem; }
            .article-cta p { font-size: 0.95rem; }
            .breadcrumb-wrap .breadcrumb { font-size: 0.78rem; }
        }

        @media screen and (max-width: 520px) {
            .container-custom { padding: 0 16px; }
            .container-narrow { padding: 0 16px; }
            .article-banner h1 { font-size: 1.3rem; }
            .article-body { padding: 20px 16px; border-radius: var(--radius-sm); }
            .article-banner .meta-line { gap: 12px; font-size: 0.8rem; flex-wrap: wrap; }
            .article-cta .btn-cta { padding: 14px 32px; font-size: 0.95rem; }
            .related-section .section-title { font-size: 1.3rem; }
        }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mt-12 { margin-top: 12px; }
        .mb-12 { margin-bottom: 12px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #5A8FE0;
            --primary-dark: #4a7bc8;
            --accent-green: #2ecc71;
            --accent-orange: #f39c12;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #1e2a3a;
            --text-dark: #1f2a3a;
            --text-body: #3a4a5a;
            --text-light: #7a8a9a;
            --text-white: #ffffff;
            --border-light: #e6edf4;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
            --transition: 0.3s cubic-bezier(0.22, 1, 0.36, 1);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

        a:hover,
        a:focus {
            color: var(--primary-dark);
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 600;
            line-height: 1.3;
            color: var(--text-dark);
        }

        /* ===== Container ===== */
        .container-custom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media screen and (max-width: 768px) {
            .container-custom {
                padding: 0 1rem;
            }
        }

        /* ===== Typography ===== */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 0.75rem;
            color: var(--text-dark);
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            text-align: center;
            max-width: 700px;
            margin: 0 auto 2.5rem auto;
        }

        @media screen and (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 1.8rem;
            }
        }

        /* ===== Button ===== */
        .btn-primary {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            padding: 0.85rem 2.2rem;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            text-align: center;
            box-shadow: 0 4px 12px rgba(90, 143, 224, 0.35);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--accent-green);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(46, 204, 113, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0px) scale(0.98);
        }

        .btn-secondary {
            display: inline-block;
            background: transparent;
            color: var(--primary);
            font-size: 1rem;
            font-weight: 600;
            padding: 0.8rem 2rem;
            border-radius: var(--radius-sm);
            border: 2px solid var(--primary);
            cursor: pointer;
            transition: background var(--transition), color var(--transition), transform var(--transition);
            text-align: center;
        }

        .btn-secondary:hover,
        .btn-secondary:focus {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-secondary:active {
            transform: translateY(0px) scale(0.98);
        }

        .btn-large {
            font-size: 1.15rem;
            padding: 1rem 2.8rem;
            border-radius: var(--radius-sm);
        }

        @media screen and (max-width: 520px) {
            .btn-primary,
            .btn-secondary {
                padding: 0.7rem 1.6rem;
                font-size: 0.92rem;
            }
            .btn-large {
                font-size: 1rem;
                padding: 0.85rem 2rem;
            }
        }

        /* ===== Badge / Tag ===== */
        .tag {
            display: inline-block;
            background: rgba(90, 143, 224, 0.12);
            color: var(--primary);
            font-size: 0.78rem;
            font-weight: 500;
            padding: 0.25rem 0.8rem;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }

        .tag-green {
            background: rgba(46, 204, 113, 0.15);
            color: #1ea85a;
        }

        .tag-orange {
            background: rgba(243, 156, 18, 0.15);
            color: #d4880f;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            transition: background var(--transition), box-shadow var(--transition);
            height: var(--header-height);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--accent-green));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            box-shadow: 0 4px 12px rgba(90, 143, 224, 0.3);
        }

        .brand-text {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-dark);
            letter-spacing: 0.5px;
        }

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

        .nav-main {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }

        .nav-main a {
            display: block;
            padding: 0.5rem 1.1rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
            position: relative;
        }

        .nav-main a:hover {
            background: rgba(90, 143, 224, 0.08);
            color: var(--primary);
        }

        .nav-main a.active {
            color: var(--primary);
            background: rgba(90, 143, 224, 0.1);
        }

        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .search-toggle {
            background: none;
            border: none;
            font-size: 1.2rem;
            color: var(--text-body);
            cursor: pointer;
            padding: 0.4rem;
            border-radius: 50%;
            transition: background var(--transition), color var(--transition);
        }

        .search-toggle:hover {
            background: rgba(90, 143, 224, 0.1);
            color: var(--primary);
        }

        .search-box {
            display: none;
            position: absolute;
            top: calc(var(--header-height) - 4px);
            left: 0;
            right: 0;
            background: #fff;
            padding: 1rem 1.5rem;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
            border-bottom: 2px solid var(--primary);
        }

        .search-box.open {
            display: block;
        }

        .search-box input {
            width: 100%;
            padding: 0.75rem 1.2rem;
            border: 2px solid var(--border-light);
            border-radius: var(--radius-sm);
            font-size: 1rem;
            transition: border-color var(--transition), box-shadow var(--transition);
            font-family: var(--font-family);
        }

        .search-box input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(90, 143, 224, 0.12);
            outline: none;
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 0.3rem;
            line-height: 1;
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(8px);
            padding: 2rem 1.5rem;
            z-index: 999;
            overflow-y: auto;
            opacity: 0;
            transform: translateY(-10px);
            transition: opacity 0.3s, transform 0.3s;
            pointer-events: none;
        }

        .mobile-nav.open {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }

        .mobile-nav a {
            display: block;
            padding: 0.9rem 0;
            font-size: 1.15rem;
            font-weight: 500;
            color: var(--text-body);
            border-bottom: 1px solid var(--border-light);
            transition: color var(--transition);
        }

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

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

        @media screen and (max-width: 860px) {
            .nav-main {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .header-actions .search-toggle {
                display: block;
            }
            .mobile-nav {
                display: block;
            }
            .brand-text {
                font-size: 1.1rem;
            }
            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
        }

        @media screen and (min-width: 861px) {
            .mobile-nav {
                display: none !important;
            }
            .hamburger {
                display: none !important;
            }
        }

        /* ===== Hero Section ===== */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 6rem 1.5rem 4rem;
            margin-top: var(--header-height);
            background: linear-gradient(135deg, rgba(90, 143, 224, 0.78), rgba(46, 204, 113, 0.35)),
                url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.25);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            color: #fff;
        }

        .hero-content h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
            letter-spacing: 1px;
        }

        .hero-content .hero-sub {
            font-size: 1.3rem;
            color: rgba(255, 255, 255, 0.92);
            margin-bottom: 0.6rem;
            font-weight: 400;
            text-shadow: 0 1px 8px rgba(0, 0, 0, 0.15);
        }

        .hero-content .hero-desc {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            margin: 0 auto 2.2rem auto;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }

        .hero-actions .btn-primary {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }

        .hero-actions .btn-primary:hover {
            background: var(--accent-green);
            color: #fff;
            box-shadow: 0 6px 24px rgba(46, 204, 113, 0.4);
        }

        .hero-actions .btn-secondary {
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
        }

        .hero-actions .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: #fff;
            color: #fff;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(4px);
            padding: 0.4rem 1.4rem;
            border-radius: 30px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 1.4rem;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        @media screen and (max-width: 768px) {
            .hero-section {
                min-height: 70vh;
                padding: 5rem 1rem 3rem;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-content .hero-sub {
                font-size: 1.05rem;
            }
            .hero-content .hero-desc {
                font-size: 0.92rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
        }

        @media screen and (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .hero-content .hero-sub {
                font-size: 0.95rem;
            }
        }

        /* ===== Section Spacing ===== */
        .section-block {
            padding: 4.5rem 0;
        }

        .section-block-alt {
            background: #fff;
        }

        .section-block-dark {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
        }

        .section-block-dark .section-title {
            color: #fff;
        }

        .section-block-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.65);
        }

        @media screen and (max-width: 768px) {
            .section-block {
                padding: 3rem 0;
            }
        }

        /* ===== Card ===== */
        .card-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .card-item .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            background: #eef3f9;
        }

        .card-item .card-body {
            padding: 1.5rem 1.4rem 1.6rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-item .card-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }

        .card-item .card-body p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
        }

        .card-item .card-body .tag {
            align-self: flex-start;
            margin-bottom: 0.6rem;
        }

        /* ===== Features Grid ===== */
        .features-grid .columns {
            margin-bottom: 1.8rem;
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            margin-bottom: 0.8rem;
            background: var(--primary);
        }

        .feature-icon.green {
            background: var(--accent-green);
        }

        .feature-icon.orange {
            background: var(--accent-orange);
        }

        .feature-icon.purple {
            background: #8e6dcf;
        }

        /* ===== Sport Categories ===== */
        .sport-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            margin-top: 1rem;
        }

        .sport-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 1.8rem 1.2rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border-light);
        }

        .sport-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .sport-item .sport-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 0.5rem;
        }

        .sport-item h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 0.2rem;
        }

        .sport-item p {
            font-size: 0.82rem;
            color: var(--text-light);
        }

        @media screen and (max-width: 900px) {
            .sport-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media screen and (max-width: 640px) {
            .sport-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
            .sport-item {
                padding: 1.2rem 0.8rem;
            }
            .sport-item .sport-icon {
                font-size: 1.6rem;
            }
        }

        @media screen and (max-width: 400px) {
            .sport-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.8rem;
            }
        }

        /* ===== Steps / Process ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            counter-reset: step;
        }

        .step-item {
            text-align: center;
            position: relative;
            padding: 2rem 1.2rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition);
        }

        .step-item:hover {
            transform: translateY(-3px);
        }

        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(90, 143, 224, 0.3);
        }

        .step-item .step-icon {
            font-size: 2rem;
            color: var(--primary);
            margin: 0.8rem 0 0.6rem;
        }

        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 0.4rem;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.5;
        }

        @media screen and (max-width: 800px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
                max-width: 420px;
                margin: 0 auto;
            }
            .step-item {
                padding: 1.8rem 1rem;
            }
        }

        /* ===== Stats / Trust ===== */
        .stats-row {
            display: flex;
            justify-content: center;
            gap: 3rem;
            flex-wrap: wrap;
            text-align: center;
        }

        .stat-item {
            padding: 1.5rem 2rem;
        }

        .stat-item .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

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

        .stat-item .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 0.2rem;
        }

        @media screen and (max-width: 640px) {
            .stats-row {
                gap: 1.5rem;
            }
            .stat-item {
                padding: 1rem 1.2rem;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
        }

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

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            margin-bottom: 0.8rem;
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            padding: 1.2rem 1.6rem;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-family);
            transition: background var(--transition);
        }

        .faq-question:hover {
            background: rgba(90, 143, 224, 0.04);
        }

        .faq-question .faq-icon {
            font-size: 0.85rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 1.6rem;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 1.6rem 1.4rem 1.6rem;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), #4a7bc8);
            padding: 4rem 1.5rem;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }

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

        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.6rem;
        }

        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 2rem auto;
        }

        .cta-section .btn-primary {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }

        .cta-section .btn-primary:hover {
            background: var(--accent-green);
            color: #fff;
        }

        @media screen and (max-width: 768px) {
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section {
                padding: 3rem 1rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 3.5rem 0 0 0;
            font-size: 0.92rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2rem;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            margin-bottom: 0.8rem;
        }

        .footer-brand .brand-icon {
            width: 34px;
            height: 34px;
            font-size: 1rem;
        }

        .footer-brand-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
        }

        .footer-col p {
            margin-bottom: 0.3rem;
            line-height: 1.7;
            font-size: 0.9rem;
        }

        .footer-col a {
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary);
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 0.8rem;
        }

        .footer-social {
            display: flex;
            gap: 0.8rem;
            margin-top: 1rem;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 1rem;
            transition: background var(--transition), color var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.4rem 0;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }

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

        @media screen and (max-width: 860px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.8rem;
            }
        }

        @media screen and (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .site-footer {
                padding: 2.5rem 0 0 0;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }

        .mt-1 {
            margin-top: 1rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }

        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .gap-1 {
            gap: 1rem;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            color: var(--text-light);
            padding: 1.2rem 0 0.2rem 0;
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .sep {
            color: #ccc;
            font-size: 0.7rem;
        }

        .breadcrumb .current {
            color: var(--text-body);
            font-weight: 500;
        }

        /* ===== Section Intro ===== */
        .section-intro {
            max-width: 800px;
            margin: 0 auto 2.5rem auto;
            text-align: center;
        }

        .section-intro p {
            font-size: 1rem;
            color: var(--text-light);
            line-height: 1.8;
        }

        /* ===== Responsive Fine-tune ===== */
        @media screen and (max-width: 520px) {
            .section-title {
                font-size: 1.4rem;
            }
            .section-subtitle {
                font-size: 0.9rem;
            }
            .card-item .card-body {
                padding: 1rem 1rem 1.2rem;
            }
            .card-item .card-body h3 {
                font-size: 1rem;
            }
            .faq-question {
                font-size: 0.95rem;
                padding: 1rem 1.2rem;
            }
            .faq-answer {
                font-size: 0.88rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 1.2rem 1rem 1.2rem;
            }
        }

        /* ===== Smooth scroll offset for anchor ===== */
        .anchor-offset {
            scroll-margin-top: calc(var(--header-height) + 20px);
        }

        /* ===== Foundation Overrides ===== */
        .row {
            max-width: var(--max-width);
        }

        .columns {
            padding-left: 0.75rem;
            padding-right: 0.75rem;
        }

        @media screen and (max-width: 640px) {
            .row .row {
                margin-left: -0.5rem;
                margin-right: -0.5rem;
            }
            .columns {
                padding-left: 0.5rem;
                padding-right: 0.5rem;
            }
        }