/* roulang page: index */
:root {
            --primary: #1663d7;
            --primary-dark: #0f52ba;
            --primary-deep: #0e418f;
            --accent: #f97316;
            --accent-dark: #ea580c;
            --bg: #f6f8fb;
            --card: #ffffff;
            --text: #0f172a;
            --text-light: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);
            --shadow: 0 4px 20px rgba(0, 0, 0, .06);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, .1);
            --transition: .3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 88px 0;
        }
        .section-light {
            background: var(--bg);
        }
        .section-white {
            background: #fff;
        }
        .section-dark {
            background: var(--dark);
            background: linear-gradient(145deg, #0b1220 0%, #14223a 100%);
            color: #fff;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 8px rgba(0, 0, 0, .04);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: .5px;
            white-space: nowrap;
        }
        .logo i {
            color: var(--primary);
            font-size: 26px;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: #334155;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 700;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 16px;
            right: 16px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px 3px 0 0;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: #f1f5f9;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 8px 14px;
            gap: 8px;
            width: 220px;
        }
        .nav-search input {
            border: none;
            outline: none;
            background: transparent;
            width: 100%;
            font-size: 14px;
            color: var(--text);
        }
        .nav-search i {
            color: var(--text-light);
            font-size: 14px;
        }
        .nav-cta {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 10px;
            padding: 9px 20px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            box-shadow: 0 4px 16px rgba(22, 99, 215, .35);
            transform: translateY(-1px);
        }

        /* Mega Menu */
        .nav-item {
            position: relative;
        }
        .mega-panel {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: #fff;
            border-radius: 16px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            padding: 20px;
            width: 420px;
            opacity: 0;
            visibility: hidden;
            transition: opacity .25s ease, transform .25s ease, visibility .25s;
        }
        .nav-item:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            transform: translateX(-50%) translateY(0);
        }
        .mega-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 8px;
        }
        .mega-card {
            display: flex;
            gap: 12px;
            padding: 12px;
            border-radius: 12px;
            background: #f8fafc;
            transition: var(--transition);
        }
        .mega-card:hover {
            background: var(--primary-light);
        }
        .mega-card i {
            font-size: 20px;
            color: var(--primary);
            margin-top: 4px;
        }
        .mega-card .mega-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }
        .mega-card .mega-desc {
            font-size: 12px;
            color: var(--text-light);
        }

        /* Mobile */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text);
            cursor: pointer;
            padding: 8px;
        }
        .mobile-collapse {
            display: none;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 132px 0 96px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: #fff;
            min-height: 560px;
            display: flex;
            align-items: center;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 18, 32, .93) 0%, rgba(15, 82, 186, .82) 60%, rgba(15, 82, 186, .6) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
            margin: 0 auto;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .15);
            border: 1px solid rgba(255, 255, 255, .25);
            border-radius: 999px;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(8px);
        }
        .hero h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }
        .hero p {
            font-size: 18px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .88);
            max-width: 620px;
            margin: 0 auto 36px;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border-radius: 12px;
            padding: 13px 30px;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 20px rgba(249, 115, 22, .35);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 26px rgba(249, 115, 22, .45);
        }
        .btn-outline {
            background: rgba(255, 255, 255, .1);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .4);
            backdrop-filter: blur(8px);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, .2);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 52px;
            padding-top: 36px;
            border-top: 1px solid rgba(255, 255, 255, .2);
        }
        .hero-stats div {
            text-align: center;
        }
        .hero-stats strong {
            display: block;
            font-size: 28px;
            font-weight: 700;
        }
        .hero-stats span {
            font-size: 14px;
            color: rgba(255, 255, 255, .72);
        }

        /* ===== Section Head ===== */
        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
        }
        .section-head .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            padding: 6px 18px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .section-head h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 12px;
        }
        .section-head p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== Feature Cards ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 32px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(22, 99, 215, .3);
        }
        .feature-card .icon {
            width: 64px;
            height: 64px;
            border-radius: 18px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin-bottom: 20px;
        }
        .feature-card .icon.blue {
            background: var(--primary-light);
            color: var(--primary);
        }
        .feature-card .icon.orange {
            background: #fff7ed;
            color: var(--accent);
        }
        .feature-card .icon.green {
            background: #ecfdf5;
            color: #10b981;
        }
        .feature-card .icon.purple {
            background: #f5f3ff;
            color: #8b5cf6;
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== Category Cards ===== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .cat-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
            display: block;
        }
        .cat-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        .cat-card .cat-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .cat-card .cat-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .cat-card:hover .cat-img img {
            transform: scale(1.06);
        }
        .cat-card .cat-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(11, 18, 32, .35));
        }
        .cat-card .cat-body {
            padding: 24px;
        }
        .cat-card .cat-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .cat-card .cat-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .cat-card .cat-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
        }
        .cat-card .cat-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* ===== News ===== */
        .news-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: stretch;
        }
        .news-featured {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        .news-featured img {
            width: 100%;
            height: 260px;
            object-fit: cover;
        }
        .news-featured .nf-body {
            padding: 28px;
        }
        .news-featured .nf-body h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .news-featured .nf-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.8;
        }
        .news-list {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 12px 20px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 16px 8px;
            border-bottom: 1px solid #f1f5f9;
            transition: var(--transition);
            border-radius: 10px;
        }
        .news-item:last-child {
            border-bottom: none;
        }
        .news-item:hover {
            background: var(--primary-light);
            padding-left: 14px;
        }
        .news-cat {
            flex-shrink: 0;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 6px;
            padding: 4px 10px;
            font-size: 12px;
            font-weight: 600;
            white-space: nowrap;
        }
        .news-title {
            flex: 1;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .news-date {
            font-size: 12px;
            color: var(--text-light);
            flex-shrink: 0;
            white-space: nowrap;
        }
        .news-empty {
            text-align: center;
            padding: 40px;
            color: var(--text-light);
            font-size: 15px;
        }

        /* ===== Stats ===== */
        .stats-band {
            background: linear-gradient(135deg, #0b1220, #14223a);
            padding: 70px 0;
            color: #fff;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stats-grid .stat-item .num {
            font-size: 42px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .stats-grid .stat-item .label {
            font-size: 15px;
            color: rgba(255, 255, 255, .75);
            margin-top: 6px;
        }

        /* ===== Process ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 32px 24px;
            position: relative;
            transition: var(--transition);
            text-align: center;
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .step-card .step-num {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 22px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }
        .step-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            margin-bottom: 14px;
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item[open] {
            box-shadow: var(--shadow);
            border-color: rgba(22, 99, 215, .3);
        }
        .faq-item summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 14px;
            color: var(--primary);
            transition: var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .faq-body {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
            border-top: 1px solid #f1f5f9;
            padding-top: 14px;
        }

        /* ===== CTA ===== */
        .cta-band {
            position: relative;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 90px 0;
            color: #fff;
            text-align: center;
        }
        .cta-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(11, 18, 32, .78);
        }
        .cta-band .container {
            position: relative;
            z-index: 2;
        }
        .cta-band h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-band p {
            font-size: 17px;
            color: rgba(255, 255, 255, .85);
            max-width: 560px;
            margin: 0 auto 32px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0b1220;
            color: rgba(255, 255, 255, .72);
            padding: 64px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .6);
        }
        .footer-grid h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .footer-grid ul {
            list-style: none;
        }
        .footer-grid ul li {
            margin-bottom: 10px;
        }
        .footer-grid ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            transition: var(--transition);
        }
        .footer-grid ul a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-wrap {
                grid-template-columns: 1fr;
            }
            .nav-actions .nav-search {
                display: none;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }
            .nav-list {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 16px 24px;
                box-shadow: var(--shadow-lg);
                border-bottom: 1px solid var(--border);
                align-items: flex-start;
                gap: 4px;
            }
            .nav-list.open {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-actions .nav-cta {
                display: none;
            }
            .nav-actions {
                gap: 4px;
            }
            .hero {
                padding: 90px 0 64px;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero p {
                font-size: 16px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stats strong {
                font-size: 22px;
            }
            .section-head h2 {
                font-size: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .mega-panel {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .feature-grid,
            .cat-grid,
            .process-grid,
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .news-wrap {
                grid-template-columns: 1fr;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 27px;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .news-item {
                flex-wrap: wrap;
                gap: 8px;
            }
            .news-title {
                white-space: normal;
                font-size: 14px;
            }
        }

/* roulang page: category1 */
:root {
  --brand-50: #eff6ff;
  --brand-100: #dbeafe;
  --brand-200: #bfdbfe;
  --brand-500: #3b82f6;
  --brand-600: #2563eb;
  --brand-700: #1d4ed8;
  --brand-800: #1e40af;
  --brand-900: #1e3a8a;
  --accent-400: #fbbf24;
  --accent-500: #f59e0b;
  --accent-600: #d97706;
  --dark: #0f172a;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
  --shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
  --transition: all 0.3s ease;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  line-height: 1.7;
  color: var(--gray-700);
  background: #fff;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
img {
  max-width: 100%;
  display: block;
}
button, input {
  font-family: inherit;
  outline: none;
  border: none;
}
.container {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 6px 28px rgba(0, 0, 0, 0.18);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  white-space: nowrap;
  letter-spacing: 1px;
}
.logo i {
  color: var(--accent-400);
  font-size: 1.5rem;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
}
.nav-item {
  position: relative;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 16px;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}
.nav-link:hover,
.nav-link.active {
  color: #fff;
  background: rgba(59, 130, 246, 0.22);
}
.nav-link i {
  font-size: 0.85rem;
  color: var(--brand-400, #60a5fa);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.nav-search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  padding: 8px 16px;
  width: 210px;
  transition: var(--transition);
}
.nav-search:focus-within {
  background: rgba(255, 255, 255, 0.16);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.4);
}
.nav-search i {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
}
.nav-search input {
  background: transparent;
  border: none;
  color: #fff;
  font-size: 0.85rem;
  width: 100%;
}
.nav-search input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}
.nav-cta {
  background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
  color: #fff;
  padding: 9px 24px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 4px 18px rgba(37, 99, 235, 0.4);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(37, 99, 235, 0.5);
}
.mobile-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  font-size: 1.1rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.mobile-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
}
.mega-panel {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 580px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: var(--transition);
  z-index: 60;
}
.nav-item:hover .mega-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(8px);
}
.mega-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.mega-card {
  display: flex;
  gap: 14px;
  padding: 14px;
  border-radius: var(--radius-sm);
  background: var(--gray-50);
  transition: var(--transition);
}
.mega-card:hover {
  background: var(--brand-50);
  transform: translateY(-2px);
}
.mega-card i {
  color: var(--brand-600);
  font-size: 1.2rem;
  margin-top: 4px;
  flex-shrink: 0;
}
.mega-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--gray-800);
}
.mega-desc {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-top: 2px;
  line-height: 1.5;
}

/* ===== 内页 Banner ===== */
.page-hero {
  position: relative;
  padding: 120px 0 96px;
  background-size: cover;
  background-position: center;
  color: #fff;
  text-align: center;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 58, 138, 0.72));
}
.page-hero .container {
  position: relative;
  z-index: 1;
}
.breadcrumb {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 22px;
}
.breadcrumb a {
  color: rgba(255, 255, 255, 0.8);
}
.breadcrumb a:hover {
  color: var(--accent-400);
}
.breadcrumb i {
  font-size: 0.6rem;
  color: rgba(255, 255, 255, 0.4);
}
.page-hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: 3px;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}
.page-hero p {
  max-width: 760px;
  margin: 0 auto 34px;
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.9;
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 32px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
  color: #fff;
  box-shadow: 0 8px 26px rgba(37, 99, 235, 0.42);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(37, 99, 235, 0.52);
}
.btn-outline {
  border-color: rgba(255, 255, 255, 0.7);
  color: #fff;
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: #fff;
}
.btn-light {
  background: #fff;
  color: var(--brand-800);
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.18);
}
.btn-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(255, 255, 255, 0.22);
}

/* ===== 通用板块 ===== */
.section {
  padding: 88px 0;
}
.bg-soft {
  background: var(--gray-50);
}
.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 54px;
}
.section-tag {
  display: inline-block;
  padding: 6px 20px;
  background: var(--brand-50);
  color: var(--brand-700);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: 1px;
}
.section-head h2 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--gray-800);
  line-height: 1.3;
  margin-bottom: 12px;
}
.section-head p {
  color: var(--gray-500);
  font-size: 1rem;
}

/* ===== 入口服务卡片 ===== */
.entry-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  height: 100%;
}
.entry-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-500), var(--accent-400));
  opacity: 0;
  transition: var(--transition);
}
.entry-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.entry-card:hover::after {
  opacity: 1;
}
.entry-icon {
  width: 66px;
  height: 66px;
  margin: 0 auto 22px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--brand-50), var(--brand-100));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.45rem;
  color: var(--brand-700);
  transition: var(--transition);
}
.entry-card:hover .entry-icon {
  background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
  color: #fff;
  transform: scale(1.06);
}
.entry-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 10px;
}
.entry-card p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.75;
  margin-bottom: 18px;
}
.card-link {
  color: var(--brand-600);
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}
.card-link:hover {
  color: var(--brand-800);
}
.card-link i {
  transition: transform 0.3s;
}
.card-link:hover i {
  transform: translateX(4px);
}

/* ===== 图文特色 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.feature-media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.feature-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 65%, rgba(15, 23, 42, 0.4));
}
.feature-media img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  transition: transform 0.6s;
}
.feature-media:hover img {
  transform: scale(1.04);
}
.feature-content {
  padding-left: 20px;
}
.feature-content .section-tag {
  margin-bottom: 14px;
}
.feature-content h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--gray-800);
  margin-bottom: 18px;
  line-height: 1.35;
}
.feature-content > p {
  color: var(--gray-500);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 22px;
}
.feature-list {
  list-style: none;
  margin-bottom: 30px;
}
.feature-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 0;
  color: var(--gray-600);
  font-size: 0.98rem;
  border-bottom: 1px dashed var(--gray-200);
}
.feature-list li:last-child {
  border-bottom: none;
}
.feature-list li i {
  color: var(--brand-600);
  font-size: 1.1rem;
  flex-shrink: 0;
}

/* ===== 登录流程 ===== */
.steps-section {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: #fff;
}
.steps-section .section-head h2 {
  color: #fff;
}
.steps-section .section-head p {
  color: rgba(255, 255, 255, 0.6);
}
.steps-section .section-tag {
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent-400);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}
.step-item {
  text-align: center;
  padding: 34px 22px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  transition: var(--transition);
  backdrop-filter: blur(4px);
}
.step-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 0.2);
}
.step-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-400);
  margin-bottom: 10px;
  line-height: 1;
}
.step-item h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: #fff;
}
.step-item p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.65;
}

/* ===== 内容卡片 ===== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.article-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
}
.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.article-thumb {
  overflow: hidden;
  position: relative;
}
.article-thumb img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  transition: transform 0.5s;
}
.article-card:hover .article-thumb img {
  transform: scale(1.05);
}
.article-body {
  padding: 26px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.article-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--brand-50);
  color: var(--brand-700);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 14px;
  align-self: flex-start;
}
.article-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 10px;
  line-height: 1.5;
}
.article-body p {
  font-size: 0.88rem;
  color: var(--gray-500);
  line-height: 1.75;
  margin-bottom: 18px;
  flex: 1;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 26px 30px;
  transition: var(--transition);
}
.faq-item:hover {
  box-shadow: var(--shadow);
  border-color: var(--brand-200);
  transform: translateX(4px);
}
.faq-item h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.faq-item h3::before {
  content: "Q";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: var(--brand-100);
  color: var(--brand-800);
  border-radius: 50%;
  font-size: 0.75rem;
  flex-shrink: 0;
  font-weight: 800;
}
.faq-item p {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.85;
  padding-left: 38px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 84px 0;
  background: linear-gradient(135deg, var(--brand-800), var(--brand-600));
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  top: -140px;
  right: -80px;
}
.cta-section::after {
  content: "";
  position: absolute;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  bottom: -90px;
  left: -60px;
}
.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #fff;
}
.cta-inner h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.cta-inner p {
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.02rem;
  margin-bottom: 30px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.65);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 44px;
}
.footer-brand .logo {
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.8;
  max-width: 320px;
}
.site-footer h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.site-footer h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--brand-500);
  border-radius: 2px;
}
.site-footer ul {
  list-style: none;
  padding: 0;
}
.site-footer ul li {
  margin-bottom: 10px;
}
.site-footer ul a {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.88rem;
  transition: var(--transition);
}
.site-footer ul a:hover {
  color: #fff;
  padding-left: 5px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 22px 0;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.45);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 32px;
  }
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .feature-media img {
    height: 330px;
  }
  .feature-content {
    padding-left: 0;
  }
  .nav-search {
    width: 160px;
  }
}
@media (max-width: 768px) {
  .nav-list {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    background: var(--dark);
    flex-direction: column;
    padding: 18px 24px 24px;
    gap: 4px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  }
  .nav-list.open {
    display: flex;
  }
  .nav-item {
    width: 100%;
  }
  .nav-link {
    width: 100%;
    border-radius: 10px;
  }
  .nav-actions .nav-search,
  .nav-actions .nav-cta {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .mega-panel {
    position: static;
    min-width: auto;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: rgba(255, 255, 255, 0.05);
    margin: 6px 0 10px;
    padding: 14px;
    border-radius: 12px;
  }
  .mega-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }
  .mega-card {
    padding: 10px;
    background: rgba(255, 255, 255, 0.04);
  }
  .mega-card i {
    font-size: 1rem;
  }
  .mega-title {
    font-size: 0.82rem;
    color: #fff;
  }
  .mega-desc {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
  }
  .page-hero {
    padding: 88px 0 64px;
  }
  .page-hero h1 {
    font-size: 2.2rem;
    letter-spacing: 2px;
  }
  .page-hero p {
    font-size: 0.95rem;
  }
  .section {
    padding: 64px 0;
  }
  .section-head {
    margin-bottom: 40px;
  }
  .section-head h2 {
    font-size: 1.7rem;
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
  .cta-inner h2 {
    font-size: 1.6rem;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .nav-container {
    height: 64px;
  }
  .logo {
    font-size: 1.1rem;
  }
  .logo i {
    font-size: 1.2rem;
  }
  .page-hero {
    padding: 70px 0 52px;
  }
  .page-hero h1 {
    font-size: 1.75rem;
  }
  .page-hero p {
    font-size: 0.9rem;
    margin-bottom: 26px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  .btn {
    width: 100%;
    max-width: 260px;
  }
  .section {
    padding: 52px 0;
  }
  .section-head h2 {
    font-size: 1.45rem;
  }
  .entry-card {
    padding: 28px 20px;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .feature-media img {
    height: 240px;
  }
  .feature-content h2 {
    font-size: 1.5rem;
  }
  .faq-item {
    padding: 20px;
  }
  .faq-item p {
    padding-left: 0;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .mega-grid {
    grid-template-columns: 1fr;
  }
  .nav-list {
    top: 64px;
  }
}

/* roulang page: article */
:root {
            --brand: #4F46E5;
            --brand-dark: #4338CA;
            --brand-light: #EEF2FF;
            --accent: #F59E0B;
            --dark-bg: #0F172A;
            --light-bg: #F8FAFC;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --radius: 18px;
            --radius-sm: 12px;
            --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.05);
            --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.14);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.75;
            background: #fff;
            color: var(--text-main);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: all .2s ease;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            outline: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ====== Header ====== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-main);
            white-space: nowrap;
        }

        .logo i {
            color: var(--brand);
            font-size: 1.45rem;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: 999px;
            font-weight: 600;
            font-size: .95rem;
            color: var(--text-main);
            transition: all .2s;
        }

        .nav-link i {
            font-size: .85rem;
            opacity: .75;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--brand);
            background: var(--brand-light);
        }

        .mega-panel {
            position: absolute;
            top: calc(100% + 10px);
            left: 50%;
            transform: translateX(-50%) translateY(10px);
            width: 540px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            padding: 20px;
            opacity: 0;
            visibility: hidden;
            transition: all .25s ease;
        }

        .nav-item:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            transform: translateX(-50%) translateY(0);
        }

        .mega-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .mega-card {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px;
            border-radius: 14px;
            background: var(--light-bg);
            transition: all .2s;
        }

        .mega-card i {
            font-size: 1.2rem;
            color: var(--brand);
            margin-top: 2px;
        }

        .mega-card:hover {
            background: var(--brand-light);
            transform: translateY(-2px);
        }

        .mega-title {
            font-weight: 700;
            font-size: .93rem;
            color: var(--text-main);
        }

        .mega-desc {
            font-size: .82rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--light-bg);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 8px 16px;
            color: var(--text-muted);
            transition: all .2s;
        }

        .nav-search:focus-within {
            border-color: var(--brand);
            box-shadow: 0 0 0 3px rgba(79, 70, 229, .12);
            background: #fff;
        }

        .nav-search input {
            width: 130px;
            font-size: .88rem;
            color: var(--text-main);
        }

        .nav-search input::placeholder {
            color: var(--text-muted);
        }

        .nav-cta {
            padding: 9px 22px;
            border-radius: 999px;
            background: var(--brand);
            color: #fff;
            font-size: .88rem;
            font-weight: 700;
            transition: all .2s;
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--brand-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(79, 70, 229, .3);
        }

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: var(--light-bg);
            color: var(--text-main);
            font-size: 1.2rem;
            cursor: pointer;
            transition: all .2s;
        }

        .mobile-toggle:hover {
            background: var(--brand-light);
            color: var(--brand);
        }

        /* ====== Article Banner ====== */
        .article-banner {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 88px 0 76px;
            color: #fff;
        }

        .article-banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, .88), rgba(49, 46, 129, .78));
        }

        .article-banner-inner {
            position: relative;
            z-index: 2;
            max-width: 860px;
            margin: 0 auto;
            text-align: center;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: .86rem;
            color: rgba(255, 255, 255, .72);
            margin-bottom: 18px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, .85);
            transition: all .2s;
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb i {
            font-size: .6rem;
            opacity: .6;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .14);
            border: 1px solid rgba(255, 255, 255, .22);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: .82rem;
            letter-spacing: .03em;
            margin-bottom: 18px;
        }

        .banner-heading {
            font-size: clamp(1.7rem, 4vw, 2.6rem);
            font-weight: 800;
            line-height: 1.35;
            letter-spacing: -.01em;
            margin-bottom: 16px;
            color: #fff;
            word-break: break-word;
        }

        .banner-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 18px;
            font-size: .88rem;
            color: rgba(255, 255, 255, .78);
        }

        .banner-meta span {
            display: flex;
            align-items: center;
            gap: 7px;
        }

        /* ====== Content Section ====== */
        .content-section {
            padding: 60px 0 70px;
            background: var(--light-bg);
        }

        .content-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 340px;
            gap: 36px;
            align-items: start;
        }

        .post-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            padding: 34px;
        }

        .post-cover {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 28px;
        }

        .post-cover img {
            width: 100%;
            height: 260px;
            object-fit: cover;
        }

        .post-body {
            font-size: 1rem;
            color: #334155;
            line-height: 1.9;
        }

        .post-body h2 {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--text-main);
            margin: 28px 0 14px;
            padding-left: 14px;
            border-left: 4px solid var(--brand);
        }

        .post-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 22px 0 12px;
        }

        .post-body p {
            margin-bottom: 16px;
        }

        .post-body ul,
        .post-body ol {
            margin: 14px 0 20px;
            padding-left: 22px;
        }

        .post-body ul li,
        .post-body ol li {
            margin-bottom: 8px;
        }

        .post-body a {
            color: var(--brand);
            font-weight: 600;
        }

        .post-body a:hover {
            text-decoration: underline;
        }

        .post-body img {
            border-radius: var(--radius-sm);
            margin: 20px 0;
        }

        .post-body blockquote {
            border-left: 4px solid var(--accent);
            background: var(--accent-50, #FFFBEB);
            padding: 14px 20px;
            border-radius: 0 12px 12px 0;
            color: #78350F;
            margin: 20px 0;
        }

        .post-body code {
            background: #F1F5F9;
            padding: 2px 8px;
            border-radius: 6px;
            font-size: .9em;
            color: #BE123C;
        }

        .post-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: .92rem;
        }

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

        .post-body th {
            background: var(--brand-light);
            font-weight: 700;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 30px;
            padding-top: 22px;
            border-top: 1px solid var(--border);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px;
            border-radius: 999px;
            background: var(--brand-light);
            color: var(--brand);
            font-size: .84rem;
            font-weight: 600;
            transition: all .2s;
        }

        .tag:hover {
            background: var(--brand);
            color: #fff;
        }

        /* ====== Sidebar ====== */
        .side-col {
            display: flex;
            flex-direction: column;
            gap: 22px;
        }

        .sidebar-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 24px;
        }

        .sidebar-card-header {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.02rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 18px;
        }

        .sidebar-card-header i {
            color: var(--brand);
        }

        .sidebar-cats {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .sidebar-cat {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
            border-radius: 12px;
            background: var(--light-bg);
            font-size: .92rem;
            font-weight: 600;
            transition: all .2s;
        }

        .sidebar-cat i {
            font-size: .75rem;
            color: var(--text-muted);
            transition: all .2s;
        }

        .sidebar-cat:hover {
            background: var(--brand-light);
            color: var(--brand);
            transform: translateX(2px);
        }

        .sidebar-cat:hover i {
            color: var(--brand);
        }

        .sidebar-list {
            list-style: none;
        }

        .sidebar-list li + li {
            margin-top: 6px;
            border-top: 1px dashed var(--border);
            padding-top: 6px;
        }

        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            border-radius: 8px;
            transition: all .2s;
        }

        .sidebar-list a:hover {
            color: var(--brand);
            transform: translateX(3px);
        }

        .sidebar-list-title {
            flex: 1;
            font-size: .88rem;
            font-weight: 600;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .sidebar-list-date {
            font-size: .75rem;
            color: var(--text-muted);
            white-space: nowrap;
            margin-top: 3px;
        }

        .sidebar-help {
            background: linear-gradient(135deg, var(--brand), var(--brand-dark));
            border-radius: var(--radius);
            padding: 28px 24px;
            color: #fff;
            text-align: center;
            box-shadow: var(--shadow-md);
        }

        .sidebar-help i {
            font-size: 2rem;
            margin-bottom: 12px;
        }

        .sidebar-help h3 {
            font-size: 1.1rem;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .sidebar-help p {
            font-size: .85rem;
            opacity: .85;
            margin-bottom: 18px;
            line-height: 1.6;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 26px;
            border-radius: 999px;
            font-size: .9rem;
            font-weight: 700;
            transition: all .25s;
            cursor: pointer;
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--brand);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--brand-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(79, 70, 229, .3);
        }

        .btn-light {
            background: #fff;
            color: var(--brand);
        }

        .btn-light:hover {
            background: var(--brand-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(255, 255, 255, .25);
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, .65);
            color: #fff;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .14);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .btn-block {
            width: 100%;
        }

        .not-found-card {
            text-align: center;
            padding: 70px 30px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
        }

        .not-found-card i {
            font-size: 3rem;
            color: var(--border);
            margin-bottom: 18px;
        }

        .not-found-card h2 {
            font-size: 1.4rem;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .not-found-card p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .empty-tip {
            color: var(--text-muted);
            font-size: .9rem;
            text-align: center;
            padding: 14px 0;
        }

        /* ====== Related ====== */
        .related-section {
            padding: 70px 0;
            background: #fff;
        }

        .section-header {
            text-align: center;
            max-width: 520px;
            margin: 0 auto 44px;
        }

        .section-eyebrow {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 999px;
            background: var(--brand-light);
            color: var(--brand);
            font-size: .82rem;
            font-weight: 700;
            letter-spacing: .06em;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 800;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .section-header p {
            color: var(--text-muted);
            font-size: .95rem;
        }

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

        .related-card {
            display: flex;
            flex-direction: column;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all .3s;
            box-shadow: var(--shadow-sm);
        }

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

        .related-cover {
            overflow: hidden;
            height: 170px;
        }

        .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s;
        }

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

        .related-info {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-info h3 {
            font-size: .98rem;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 8px;
            color: var(--text-main);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-info p {
            font-size: .84rem;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ====== FAQ ====== */
        .faq-section {
            padding: 70px 0;
            background: var(--light-bg);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 22px;
            max-width: 960px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px 26px;
            box-shadow: var(--shadow-sm);
            transition: all .25s;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--brand-light);
        }

        .faq-question {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .faq-question i {
            color: var(--accent);
            margin-top: 4px;
            font-size: .9rem;
        }

        .faq-answer {
            font-size: .9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ====== CTA ====== */
        .cta-section {
            padding: 70px 0;
            background: var(--dark-bg);
        }

        .cta-box {
            background: linear-gradient(135deg, var(--brand), #7C3AED);
            border-radius: 28px;
            padding: 48px 50px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .cta-box::after {
            content: '';
            position: absolute;
            right: -40px;
            top: -60px;
            width: 220px;
            height: 220px;
            background: rgba(255, 255, 255, .08);
            border-radius: 50%;
        }

        .cta-eyebrow {
            font-size: .85rem;
            font-weight: 700;
            letter-spacing: .08em;
            color: rgba(255, 255, 255, .7);
            text-transform: uppercase;
        }

        .cta-box h2 {
            font-size: clamp(1.4rem, 3vw, 1.9rem);
            color: #fff;
            font-weight: 800;
            margin-top: 6px;
        }

        .cta-box p {
            color: rgba(255, 255, 255, .85);
            font-size: .95rem;
            margin-top: 8px;
        }

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

        /* ====== Footer ====== */
        .site-footer {
            background: var(--dark-bg);
            color: rgba(255, 255, 255, .8);
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 48px;
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand .logo i {
            color: #818CF8;
        }

        .footer-brand p {
            font-size: .88rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, .6);
            max-width: 260px;
        }

        .site-footer h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .site-footer ul {
            list-style: none;
        }

        .site-footer ul li {
            margin-bottom: 9px;
        }

        .site-footer ul a {
            font-size: .88rem;
            color: rgba(255, 255, 255, .62);
            transition: all .2s;
        }

        .site-footer ul a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .12);
            padding: 22px 0;
            text-align: center;
            font-size: .85rem;
            color: rgba(255, 255, 255, .5);
        }

        /* ====== Responsive ====== */
        @media (max-width: 1024px) {
            .content-layout {
                grid-template-columns: 1fr;
            }

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

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

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

            .nav-list {
                position: fixed;
                top: 72px;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                width: 320px;
                max-width: 90vw;
                background: #fff;
                border-left: 1px solid var(--border);
                border-bottom: 1px solid var(--border);
                border-radius: 0 0 0 20px;
                box-shadow: var(--shadow-lg);
                padding: 18px;
                gap: 4px;
                transform: translateX(110%);
                transition: transform .3s ease;
                overflow-y: auto;
                max-height: calc(100vh - 72px);
            }

            .nav-list.open {
                transform: translateX(0);
            }

            .nav-list .nav-item {
                width: 100%;
            }

            .nav-list .nav-link {
                width: 100%;
                justify-content: flex-start;
                padding: 12px 16px;
            }

            .mega-panel {
                position: static;
                width: 100%;
                transform: none;
                opacity: 1;
                visibility: visible;
                border: none;
                box-shadow: none;
                padding: 0 0 4px 16px;
                background: transparent;
            }

            .mega-panel .mega-grid {
                grid-template-columns: 1fr;
                gap: 8px;
            }

            .nav-item:hover .mega-panel {
                transform: none;
            }

            .nav-search {
                display: none;
            }

            .mobile-toggle {
                display: inline-flex;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }

            .nav-container {
                height: 64px;
            }

            .nav-list {
                top: 64px;
            }

            .logo {
                font-size: 1.05rem;
            }

            .article-banner {
                padding: 60px 0 52px;
            }

            .banner-heading {
                font-size: 1.45rem;
            }

            .banner-meta {
                gap: 10px;
                font-size: .82rem;
            }

            .post-card {
                padding: 22px;
            }

            .post-cover img {
                height: 190px;
            }

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

            .related-cover {
                height: 200px;
            }

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

            .cta-box {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
            }

            .cta-actions {
                justify-content: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 520px) {
            .content-section {
                padding: 40px 0;
            }

            .related-section {
                padding: 48px 0;
            }

            .faq-section {
                padding: 48px 0;
            }

            .cta-section {
                padding: 48px 0;
            }

            .side-col {
                grid-template-columns: 1fr;
            }

            .post-body {
                font-size: .95rem;
            }

            .post-body h2 {
                font-size: 1.25rem;
            }

            .post-cover img {
                height: 160px;
            }

            .banner-meta span {
                font-size: .8rem;
            }

            .nav-cta {
                padding: 8px 16px;
                font-size: .8rem;
            }
        }

/* roulang page: category2 */
:root{
    --primary: #1f72f0;
    --primary-dark: #185bdc;
    --primary-light: #daefff;
    --accent: #ff9f1c;
    --bg-light: #f5f8fc;
    --bg-white: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-light: #e2e8f0;
    --radius-card: 1rem;
    --radius-lg: 1.5rem;
    --shadow-card: 0 4px 24px rgba(15,23,42,0.08);
    --shadow-hover: 0 12px 36px rgba(15,23,42,0.14);
    --transition-base: all 0.3s ease;
  }

  body{
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-main);
    background: var(--bg-light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }

  /* 基础 Reset */
  *, *::before, *::after{ box-sizing: border-box; margin: 0; padding: 0; }
  img{ max-width: 100%; display: block; }
  a{ text-decoration: none; color: inherit; transition: color 0.2s ease; }
  ul, ol{ list-style: none; }
  button{ background: none; border: none; cursor: pointer; font-family: inherit; }
  input, textarea{ font-family: inherit; }
  h1, h2, h3, h4, h5{ line-height: 1.3; font-weight: 800; color: #0f172a; }

  .container{
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  /* Header */
  .site-header{
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
  }
  .nav-container{
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
    gap: 2rem;
    position: relative;
  }
  .logo{
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.45rem;
    font-weight: 900;
    color: var(--primary-dark);
    letter-spacing: -0.02em;
    flex-shrink: 0;
    white-space: nowrap;
  }
  .logo i{
    font-size: 1.6rem;
    color: var(--primary);
    background: var(--primary-light);
    width: 2.4rem;
    height: 2.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.8rem;
  }
  .nav-list{
    display: flex;
    align-items: center;
    gap: 0.2rem;
    flex: 1;
    justify-content: center;
  }
  .nav-list > li{
    position: relative;
  }
  .nav-link{
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: #334155;
    border-radius: 0.75rem;
    transition: var(--transition-base);
    white-space: nowrap;
  }
  .nav-link i{
    color: var(--text-muted);
    font-size: 0.85rem;
    transition: color 0.2s ease;
  }
  .nav-link:hover{
    color: var(--primary);
    background: var(--primary-light);
  }
  .nav-link:hover i{
    color: var(--primary);
  }
  .nav-link.active{
    color: var(--primary-dark);
    background: var(--primary-light);
  }
  .nav-link.active i{
    color: var(--primary);

  }

  /* Mega Panel */
  .mega-panel{
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(6px);
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 50px rgba(0,0,0,0.12);
    padding: 1.6rem;
    min-width: 520px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s ease;
    border: 1px solid var(--border-light);
    z-index: 50;
  }
  .nav-item:hover .mega-panel{
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }
  .mega-grid{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8rem;
  }
  .mega-card{
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    padding: 0.9rem 1rem;
    border-radius: 0.9rem;
    transition: var(--transition-base);
    border: 1px solid transparent;
  }
  .mega-card:hover{
    background: var(--bg-light);
    border-color: var(--border-light);
  }
  .mega-card > i{
    font-size: 1.1rem;
    color: var(--primary);
    background: var(--primary-light);
    width: 2.2rem;
    height: 2.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.7rem;
    flex-shrink: 0;
  }
  .mega-title{
    font-weight: 700;
    font-size: 0.92rem;
    color: var(--text-main);
    margin-bottom: 0.2rem;
  }
  .mega-desc{
    font-size: 0.8rem;
    color: var(--text-muted);
  }

  .nav-actions{
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex-shrink: 0;
  }
  .nav-search{
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-light);
    border: 1px solid var(--border-light);
    border-radius: 2rem;
    padding: 0.4rem 1rem;
    width: 190px;
    transition: border-color 0.3s ease;
  }
  .nav-search:focus-within{
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(31,114,240,0.12);
  }
  .nav-search i{
    color: var(--text-muted);
    font-size: 0.85rem;
  }
  .nav-search input{
    border: none;
    outline: none;
    background: transparent;
    font-size: 0.85rem;
    width: 100%;
    color: var(--text-main);
  }

  .nav-cta{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    font-size: 0.88rem;
    font-weight: 700;
    padding: 0.55rem 1.1rem;
    border-radius: 2rem;
    transition: var(--transition-base);
    box-shadow: 0 4px 12px rgba(31,114,240,0.25);
    white-space: nowrap;
  }
  .nav-cta:hover{
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(31,114,240,0.35);
    color: #fff;
  }

  .mobile-toggle{
    display: none;
    font-size: 1.4rem;
    color: var(--text-main);
    padding: 0.4rem 0.6rem;
    border-radius: 0.5rem;
    transition: background 0.2s;
  }
  .mobile-toggle:hover{
    background: var(--bg-light);
  }

  /* Hero */
  .page-hero{
    background: linear-gradient(135deg, #0b1220 0%, #132a4a 60%, #1b3a66 100%);
    padding: 5rem 0 3.5rem;
    position: relative;
    overflow: hidden;
  }
  .page-hero::before{
    content: '';
    position: absolute;
    top: -40%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(53, 150, 255, 0.18) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
  }
  .page-hero::after{
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,159,28,0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
  }
  .page-hero .container{
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .page-hero .hero-badge{
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(53,150,255,0.15);
    border: 1px solid rgba(53,150,255,0.25);
    color: #90d2ff;
    padding: 0.35rem 1.2rem;
    border-radius: 2rem;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(4px);
  }
  .page-hero h1{
    color: #fff;
    font-size: 2.9rem;
    font-weight: 900;
    letter-spacing: -0.02em;
    max-width: 720px;
    line-height: 1.2;
    margin-bottom: 1.2rem;
  }
  .page-hero h1 span{
    color: #5bb7ff;
  }
  .page-hero p{
    color: rgba(255,255,255,0.8);
    font-size: 1.12rem;
    max-width: 620px;
    margin-bottom: 2rem;
  }
  .hero-actions{
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  .btn{
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    padding: 0.8rem 1.8rem;
    border-radius: 999px;
    font-size: 0.98rem;
    transition: var(--transition-base);
    justify-content: center;
  }
  .btn-primary{
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 20px rgba(31,114,240,0.35);
  }
  .btn-primary:hover{
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(31,114,240,0.45);
    color: #fff;
  }
  .btn-outline-light{
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255,255,255,0.35);
  }
  .btn-outline-light:hover{
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.6);
    color: #fff;
    transform: translateY(-3px);
  }

  /* 面包屑 */
  .breadcrumb-wrap{
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-light);
    padding: 0.9rem 0;
    font-size: 0.88rem;
    color: var(--text-muted);
  }
  .breadcrumb-wrap a{
    color: var(--primary);
    font-weight: 600;
  }
  .breadcrumb-wrap a:hover{
    text-decoration: underline;
  }
  .breadcrumb-wrap i{
    font-size: 0.7rem;
    margin: 0 0.5rem;
    color: #94a3b8;
  }

  /* 板块通用 */
  .section{
    padding: 4.5rem 0;
  }
  .section-sm{
    padding: 3rem 0;
  }
  .section-alt{
    background: var(--bg-white);
  }
  .section-header{
    text-align: center;
    max-width: 720px;
    margin: 0 auto 3rem;
  }
  .section-tag{
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary-dark);
    font-size: 0.78rem;
    font-weight: 800;
    padding: 0.3rem 1rem;
    border-radius: 2rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 1rem;
  }
  .section-header h2{
    font-size: 2.2rem;
    font-weight: 900;
    color: #0f172a;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
  }
  .section-header p{
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
  }

  /* 搜索区 */
  .help-search{
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 2.5rem;
    border: 1px solid var(--border-light);
    margin-top: -2rem;
    position: relative;
    z-index: 10;
  }
  .help-search .search-form{
    display: flex;
    gap: 0.8rem;
    max-width: 720px;
    margin: 0 auto;
  }
  .help-search .search-input-wrap{
    flex: 1;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--bg-light);
    border: 1.5px solid var(--border-light);
    border-radius: 999px;
    padding: 0.6rem 1.2rem;
    transition: var(--transition-base);
  }
  .help-search .search-input-wrap:focus-within{
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(31,114,240,0.1);
  }
  .help-search .search-input-wrap i{
    color: var(--text-muted);
  }
  .help-search input{
    border: none;
    outline: none;
    background: transparent;
    width: 100%;
    font-size: 1rem;
    color: var(--text-main);
  }
  .help-search .search-btn{
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    padding: 0.7rem 2rem;
    border-radius: 999px;
    transition: var(--transition-base);
    white-space: nowrap;
    box-shadow: 0 4px 14px rgba(31,114,240,0.3);
  }
  .help-search .search-btn:hover{
    background: var(--primary-dark);
    transform: translateY(-2px);
  }
  .help-tags{
    display: flex;
    align-items: center;
    gap: 0.6rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 1.5rem;
  }
  .help-tags span{
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-muted);
  }
  .tag{
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-dark);
    background: var(--primary-light);
    padding: 0.3rem 1rem;
    border-radius: 2rem;
    transition: var(--transition-base);
    cursor: pointer;
  }
  .tag:hover{
    background: var(--primary);
    color: #fff;
  }

  /* 快速入口卡片 */
  .quick-grid{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
  .quick-card{
    background: var(--bg-white);
    border-radius: var(--radius-card);
    padding: 2rem 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-light);
    transition: var(--transition-base);
  }
  .quick-card:hover{
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-light);
  }
  .quick-icon{
    width: 3.2rem;
    height: 3.2rem;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin: 0 auto 1rem;
  }
  .quick-card h3{
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
  }
  .quick-card p{
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 1.2rem;
  }
  .quick-link{
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: gap 0.2s ease;
  }
  .quick-link:hover{
    gap: 0.7rem;
    color: var(--primary-dark);
  }

  /* 常见问题帮助卡片 */
  .help-grid{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .help-card{
    background: var(--bg-white);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 2rem;
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
    border-left: 4px solid var(--primary);
  }
  .help-card:hover{
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
  }
  .help-card .help-index{
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary-light);
    margin-bottom: 0.8rem;
    line-height: 1;
  }
  .help-card h3{
    font-size: 1.2rem;
    font-weight: 800;
    margin-bottom: 0.6rem;
  }
  .help-card p{
    color: var(--text-muted);
    font-size: 0.94rem;
    line-height: 1.7;
    margin-bottom: 1.2rem;
  }
  .help-steps{
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.2rem;
  }
  .help-step{
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    font-size: 0.9rem;
    color: var(--text-main);
  }
  .help-step i{
    color: var(--primary);
    margin-top: 0.3rem;
    font-size: 0.8rem;
  }
  .help-toggle{
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary);
    cursor: pointer;
    transition: var(--transition-base);
    background: var(--primary-light);
    padding: 0.5rem 1.2rem;
    border-radius: 2rem;
  }
  .help-toggle:hover{
    background: var(--primary);
    color: #fff;
    gap: 0.7rem;
  }

  /* 流程步骤 */
  .process-section{
    background: #0b1220;
    color: #fff;
  }
  .process-section .section-header h2{
    color: #fff;
  }
  .process-section .section-header p{
    color: rgba(255,255,255,0.6);
  }
  .process-grid{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 2rem;
  }
  .process-step{
    text-align: center;
    position: relative;
    padding: 0 1rem;
  }
  .process-step:not(:last-child)::after{
    content: '→';
    position: absolute;
    right: -1rem;
    top: 50%;
    transform: translateY(-50%);
    color: rgba(255,255,255,0.2);
    font-size: 1.5rem;
  }
  .process-num{
    width: 3.5rem;
    height: 3.5rem;
    background: rgba(53,150,255,0.15);
    border: 1px solid rgba(53,150,255,0.3);
    color: #90d2ff;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 900;
    margin: 0 auto 1.2rem;
    backdrop-filter: blur(4px);
  }
  .process-step h3{
    color: #fff;
    font-size: 1.1rem;
    margin-bottom: 0.6rem;
    font-weight: 800;
  }
  .process-step p{
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    line-height: 1.6;
  }

  /* 推荐内容卡片 */
  .content-card-grid{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.8rem;
  }
  .content-card{
    background: var(--bg-white);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-light);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
  }
  .content-card:hover{
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
  }
  .content-cover{
    position: relative;
    height: 200px;
    overflow: hidden;
    background: #e2e8f0;
  }
  .content-cover img{
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }
  .content-card:hover .content-cover img{
    transform: scale(1.06);
  }
  .content-cover .cover-badge{
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(15,23,42,0.7);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.3rem 0.9rem;
    border-radius: 2rem;
    backdrop-filter: blur(6px);
    letter-spacing: 0.02em;
  }
  .content-body{
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
  }
  .content-body h3{
    font-size: 1.15rem;
    font-weight: 800;
    margin-bottom: 0.6rem;
    line-height: 1.4;
    transition: var(--transition-base);
  }
  .content-body h3:hover{
    color: var(--primary);
  }
  .content-body p{
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 1rem;
    flex: 1;
  }
  .content-meta{
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.8rem;
    color: #94a3b8;
    padding-top: 1rem;
    border-top: 1px solid var(--border-light);
  }
  .content-meta i{
    margin-right: 0.2rem;
  }

  /* 视频教程板块 */
  .tutorial-section{
    background: linear-gradient(135deg, #eff8ff 0%, #daefff 50%, #eff8ff 100%);
  }
  .tutorial-grid{
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 3rem;
    align-items: center;
  }
  .tutorial-media{
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(15,23,42,0.15);
    position: relative;
  }
  .tutorial-media img{
    width: 100%;
    height: 380px;
    object-fit: cover;
  }
  .tutorial-media::after{
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(11,18,32,0.4) 0%, transparent 50%);
    pointer-events: none;
  }
  .tutorial-play{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 5rem;
    height: 5rem;
    background: rgba(255,255,255,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.5rem;
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
    transition: var(--transition-base);
    z-index: 2;
  }
  .tutorial-play:hover{
    transform: translate(-50%, -50%) scale(1.08);
    background: var(--primary);
    color: #fff;
  }
  .tutorial-list{
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
  .tutorial-item{
    display: flex;
    gap: 1rem;
    background: var(--bg-white);
    border-radius: 1rem;
    padding: 1.2rem 1.5rem;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-light);
    transition: var(--transition-base);
    align-items: center;
  }
  .tutorial-item:hover{
    box-shadow: var(--shadow-hover);
    transform: translateX(-4px);
    border-color: var(--primary-light);
  }
  .tutorial-icon{
    width: 3rem;
    height: 3rem;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
  }
  .tutorial-item h4{
    font-weight: 800;
    font-size: 1rem;
    margin-bottom: 0.2rem;
  }
  .tutorial-item p{
    font-size: 0.82rem;
    color: var(--text-muted);
  }
  .tutorial-item .duration{
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary);
    margin-left: auto;
    white-space: nowrap;
    background: var(--primary-light);
    padding: 0.2rem 0.8rem;
    border-radius: 2rem;
  }

  /* FAQ 折叠 */
  .faq-wrap{
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
  .faq-item{
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: 1rem;
    overflow: hidden;
    transition: var(--transition-base);
  }
  .faq-item:hover{
    border-color: var(--primary-light);
    box-shadow: var(--shadow-card);
  }
  .faq-item summary{
    list-style: none;
    cursor: pointer;
    padding: 1.5rem 1.8rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
    transition: var(--transition-base);
  }
  .faq-item summary::-webkit-details-marker{
    display: none;
  }
  .faq-item summary .faq-icon{
    width: 2.2rem;
    height: 2.2rem;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--primary);
    transition: all 0.3s ease;
  }
  .faq-item[open] summary .faq-icon{
    background: var(--primary);
    color: #fff;
    transform: rotate(45deg);
  }
  .faq-item .faq-answer{
    padding: 0 1.8rem 1.5rem 5rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.8;
  }

  /* CTA */
  .cta-box{
    background: linear-gradient(135deg, #1f72f0 0%, #185bdc 60%, #1b3a66 100%);
    border-radius: 2rem;
    padding: 3.5rem 3rem;
    text-align: center;
    position: relative;
    overflow: hidden;
  }
  .cta-box::before{
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
  }
  .cta-box h2{
    color: #fff;
    font-size: 2.2rem;
    font-weight: 900;
    margin-bottom: 1rem;
    position: relative;
    z-index: 2;
  }
  .cta-box p{
    color: rgba(255,255,255,0.85);
    font-size: 1.1rem;
    max-width: 560px;
    margin: 0 auto 2rem;
    position: relative;
    z-index: 2;
  }
  .cta-actions{
    display: flex;
    gap: 1.2rem;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
  }
  .btn-white{
    background: #fff;
    color: var(--primary-dark);
    font-weight: 800;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  }
  .btn-white:hover{
    background: var(--accent);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.2);
    color: #0b1220;
  }
  .btn-outline-white{
    background: transparent;
    border: 2px solid rgba(255,255,255,0.5);
    color: #fff;
  }
  .btn-outline-white:hover{
    background: rgba(255,255,255,0.1);
    border-color: #fff;
    color: #fff;
    transform: translateY(-3px);
  }

  /* 页脚 */
  .site-footer{
    background: #0b1220;
    color: rgba(255,255,255,0.7);
    padding: 4rem 0 0;
    margin-top: 0;
  }
  .footer-grid{
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 2.5rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .footer-brand .logo{
    color: #fff;
    margin-bottom: 1rem;
  }
  .footer-brand .logo i{
    background: rgba(53,150,255,0.15);
    color: #90d2ff;
    border: 1px solid rgba(53,150,255,0.2);
  }
  .footer-brand p{
    font-size: 0.9rem;
    line-height: 1.7;
    color: rgba(255,255,255,0.6);
    max-width: 300px;
  }
  .footer-grid h4{
    color: #fff;
    font-size: 1rem;
    font-weight: 800;
    margin-bottom: 1.2rem;
  }
  .footer-grid ul{
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
  }
  .footer-grid ul a{
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
    transition: var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
  }
  .footer-grid ul a:hover{
    color: #fff;
    padding-left: 0.3rem;
  }
  .footer-grid ul a::before{
    content: '›';
    color: var(--primary);
    font-weight: 700;
  }
  .footer-bottom{
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
  }

  /* 响应式 */
  @media (max-width: 1024px){
    .quick-grid{
      grid-template-columns: repeat(2, 1fr);
    }
    .process-grid{
      grid-template-columns: repeat(2, 1fr);
      gap: 1.5rem;
    }
    .process-step:not(:last-child)::after{
      display: none;
    }
    .footer-grid{
      grid-template-columns: 1fr 1fr;
    }
    .content-card-grid{
      grid-template-columns: repeat(2, 1fr);
    }
    .nav-search{
      display: none;
    }
    .mega-panel{
      min-width: 420px;
    }
  }

  @media (max-width: 768px){
    .nav-container{
      height: 64px;
    }
    .nav-list{
      position: fixed;
      top: 64px;
      left: 0;
      right: 0;
      background: var(--bg-white);
      flex-direction: column;
      align-items: flex-start;
      padding: 1rem 1.5rem 1.5rem;
      box-shadow: 0 20px 40px rgba(0,0,0,0.1);
      gap: 0.4rem;
      max-height: calc(100vh - 64px);
      overflow-y: auto;
      transform: translateY(-120%);
      transition: transform 0.3s ease;
      z-index: 99;
      border-bottom: 1px solid var(--border-light);
    }
    .nav-list.show{
      transform: translateY(0);
    }
    .nav-list > li{
      width: 100%;
    }
    .nav-link{
      padding: 0.8rem 1rem;
      font-size: 1rem;
      width: 100%;
    }
    .mega-panel{
      position: static;
      transform: none;
      opacity: 1;
      visibility: visible;
      box-shadow: none;
      border: none;
      padding: 0.5rem 0 0.5rem 1rem;
      min-width: 0;
      display: none;
    }
    .nav-item:hover .mega-panel{
      transform: none;
      display: block;
    }
    .mega-grid{
      grid-template-columns: 1fr;
    }
    .mobile-toggle{
      display: block;
    }
    .nav-actions{
      gap: 0.5rem;
    }
    .nav-cta{
      padding: 0.45rem 0.9rem;
      font-size: 0.8rem;
    }
    .page-hero{
      padding: 3rem 0 2.5rem;
    }
    .page-hero h1{
      font-size: 2.1rem;
    }
    .page-hero p{
      font-size: 1rem;
    }
    .section{
      padding: 3rem 0;
    }
    .section-header h2{
      font-size: 1.8rem;
    }
    .help-search{
      padding: 1.5rem;
    }
    .help-search .search-form{
      flex-direction: column;
    }
    .help-search .search-btn{
      width: 100%;
    }
    .quick-grid{
      grid-template-columns: 1fr 1fr;
      gap: 1rem;
    }
    .help-grid{
      grid-template-columns: 1fr;
    }
    .content-card-grid{
      grid-template-columns: 1fr;
    }
    .tutorial-grid{
      grid-template-columns: 1fr;
    }
    .tutorial-media img{
      height: 240px;
    }
    .faq-item .faq-answer{
      padding-left: 1.8rem;
    }
    .cta-box{
      padding: 2.5rem 1.5rem;
      border-radius: 1.5rem;
    }
    .cta-box h2{
      font-size: 1.6rem;
    }
    .footer-grid{
      grid-template-columns: 1fr;
      gap: 2rem;
    }
  }

  @media (max-width: 520px){
    .container{
      padding-left: 1rem;
      padding-right: 1rem;
    }
    .logo{
      font-size: 1.15rem;
    }
    .logo i{
      width: 2rem;
      height: 2rem;
      font-size: 1.2rem;
    }
    .quick-grid{
      grid-template-columns: 1fr;
    }
    .process-grid{
      grid-template-columns: 1fr;
    }
    .hero-actions{
      flex-direction: column;
    }
    .hero-actions .btn{
      width: 100%;
    }
    .page-hero h1{
      font-size: 1.8rem;
    }
    .section-header h2{
      font-size: 1.5rem;
    }
    .content-card-grid{
      grid-template-columns: 1fr;
    }
    .tutorial-item{
      flex-wrap: wrap;
    }
    .tutorial-item .duration{
      display: none;
    }
    .faq-item summary{
      padding: 1.2rem 1.2rem;
      font-size: 0.95rem;
    }
    .faq-item .faq-answer{
      padding: 0 1.2rem 1.2rem;
      font-size: 0.88rem;
    }
    .cta-actions .btn{
      width: 100%;
    }
  }

/* roulang page: category3 */
:root {
            --brand-600: #0070c5;
            --brand-700: #0059a0;
            --brand-800: #064b84;
            --brand-900: #0a3f6e;
            --accent-500: #f4880b;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --bg-light: #f1f5f9;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            color: var(--text-main);
            background: var(--bg-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul {
            list-style: none;
        }

        .container-lg {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        @media (max-width: 768px) {
            .container-lg {
                padding: 0 20px;
            }
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--brand-900);
            white-space: nowrap;
        }

        .logo i {
            color: var(--accent-500);
            font-size: 24px;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
        }

        .nav-list>li {
            position: relative;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 16px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition);
        }

        .nav-link:hover {
            background: var(--bg-light);
            color: var(--brand-600);
        }

        .nav-link.active {
            background: rgba(0, 112, 197, 0.1);
            color: var(--brand-600);
            font-weight: 600;
        }

        .mega-panel {
            display: none;
            position: absolute;
            top: calc(100% + 8px);
            left: 0;
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
            padding: 24px;
            min-width: 520px;
            z-index: 60;
        }

        .nav-item:hover .mega-panel {
            display: block;
            animation: fadeInUp 0.25s ease;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .mega-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .mega-card {
            display: flex;
            gap: 12px;
            padding: 16px;
            border-radius: var(--radius-md);
            background: var(--bg-light);
            transition: var(--transition);
            cursor: default;
        }

        .mega-card:hover {
            background: #e8f4fd;
            transform: translateY(-2px);
        }

        .mega-card>i {
            font-size: 22px;
            color: var(--brand-600);
            margin-top: 4px;
        }

        .mega-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
        }

        .mega-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
            line-height: 1.5;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-light);
            border-radius: 50px;
            padding: 8px 16px;
            border: 1px solid transparent;
            transition: var(--transition);
        }

        .nav-search:focus-within {
            border-color: var(--brand-600);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(0, 112, 197, 0.1);
        }

        .nav-search i {
            color: var(--text-muted);
            font-size: 14px;
        }

        .nav-search input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            width: 120px;
            color: var(--text-main);
        }

        .nav-cta {
            background: var(--brand-600);
            color: #fff;
            padding: 9px 20px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--brand-700);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 112, 197, 0.3);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--brand-900);
            cursor: pointer;
            padding: 8px;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 120px 0;
            color: #fff;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 63, 110, 0.92) 0%, rgba(0, 112, 197, 0.75) 100%);
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 24px;
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .hero h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .hero-desc {
            font-size: 18px;
            line-height: 1.8;
            max-width: 680px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 36px;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-500);
            color: #fff;
            padding: 14px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(244, 136, 11, 0.35);
        }

        .btn-primary:hover {
            background: #e07a06;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(244, 136, 11, 0.4);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 2px solid rgba(255, 255, 255, 0.6);
            color: #fff;
            padding: 12px 26px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
        }

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

        /* ===== 通用板块 ===== */
        .section {
            padding: 96px 0;
        }

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

        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            background: rgba(0, 112, 197, 0.08);
            color: var(--brand-600);
            font-size: 13px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 50px;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }

        .section-head h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--brand-900);
            line-height: 1.3;
            margin-bottom: 16px;
        }

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

        /* ===== 帮助卡片 ===== */
        .help-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .help-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: var(--transition);
        }

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

        .help-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            background: rgba(0, 112, 197, 0.1);
            color: var(--brand-600);
            margin-bottom: 20px;
        }

        .help-card:nth-child(2) .help-icon {
            background: rgba(244, 136, 11, 0.12);
            color: var(--accent-500);
        }

        .help-card:nth-child(3) .help-icon {
            background: rgba(16, 185, 129, 0.12);
            color: #10b981;
        }

        .help-card:nth-child(4) .help-icon {
            background: rgba(99, 102, 241, 0.12);
            color: #6366f1;
        }

        .help-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .help-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .help-card>a {
            font-size: 14px;
            font-weight: 600;
            color: var(--brand-600);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .help-card>a:hover {
            color: var(--brand-800);
            gap: 10px;
        }

        /* ===== 登录流程 ===== */
        .flow-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .flow-steps {
            display: flex;
            flex-direction: column;
        }

        .flow-step {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            position: relative;
        }

        .flow-step:not(:last-child)::after {
            content: '';
            position: absolute;
            left: 27px;
            top: 72px;
            bottom: -8px;
            width: 2px;
            background: linear-gradient(to bottom, rgba(0, 112, 197, 0.2), rgba(0, 112, 197, 0.05));
        }

        .step-num {
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--brand-600);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(0, 112, 197, 0.3);
            position: relative;
            z-index: 2;
        }

        .step-content h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .step-content p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .flow-image {
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }

        .flow-image img {
            width: 100%;
            height: 480px;
            object-fit: cover;
        }

        .flow-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(10, 63, 110, 0.4), transparent);
        }

        .flow-image-caption {
            position: absolute;
            bottom: 24px;
            left: 24px;
            z-index: 2;
            color: #fff;
            font-size: 20px;
            font-weight: 700;
        }

        /* ===== 热门内容卡片 ===== */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .content-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            display: block;
        }

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

        .content-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .content-body {
            padding: 24px;
        }

        .badge {
            display: inline-block;
            background: rgba(0, 112, 197, 0.08);
            color: var(--brand-600);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            margin-bottom: 12px;
        }

        .content-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .content-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .content-body .more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--brand-600);
            margin-top: 16px;
        }

        .content-body .more:hover {
            gap: 10px;
        }

        /* ===== 安全提示深色区 ===== */
        .section-dark {
            background: var(--brand-900);
            color: #fff;
        }

        .security-wrap {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .section-tag.light {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }

        .security-wrap h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .security-wrap p {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 24px;
        }

        .security-wrap ul {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px 24px;
        }

        .security-wrap ul li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 500;
        }

        .security-wrap ul li i {
            color: #34d399;
            font-size: 16px;
        }

        .security-image {
            border-radius: 24px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
        }

        .security-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }

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

        .faq-item {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: #cbd5e1;
        }

        .faq-item[open] {
            box-shadow: var(--shadow-card);
            border-color: rgba(0, 112, 197, 0.3);
        }

        .faq-item summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-main);
        }

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

        .faq-item summary::after {
            content: '\f067';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 14px;
            color: var(--brand-600);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 16px;
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
            content: '\f068';
        }

        .faq-content {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            border-top: 1px solid #f1f5f9;
            padding-top: 16px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--brand-600) 0%, var(--brand-800) 100%);
            padding: 72px 0;
        }

        .cta-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-wrap h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .cta-wrap p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 15px;
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--brand-600);
            padding: 14px 30px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 15px;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0b1f33;
            color: rgba(255, 255, 255, 0.75);
            padding: 72px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 300px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-grid h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .footer-grid ul li {
            margin-bottom: 12px;
        }

        .footer-grid ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }

        .footer-grid ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            padding-top: 32px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

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

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

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

            .flow-wrap {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .security-wrap {
                grid-template-columns: 1fr;
            }

            .nav-search {
                display: none;
            }

            .nav-list {
                display: none;
                position: fixed;
                top: 76px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
                border-radius: 0 0 16px 16px;
                max-height: calc(100vh - 76px);
                overflow-y: auto;
            }

            .nav-list.open {
                display: flex;
            }

            .nav-list>li {
                width: 100%;
            }

            .nav-link {
                justify-content: flex-start;
                padding: 14px 16px;
            }

            .mega-panel {
                position: static;
                display: block;
                box-shadow: none;
                padding: 8px 0 8px 16px;
                min-width: 0;
                background: transparent;
            }

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

            .mega-card {
                background: rgba(0, 112, 197, 0.04);
            }

            .mobile-toggle {
                display: block;
            }
        }

        @media (max-width: 768px) {
            .hero {
                padding: 80px 0;
            }

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

            .hero-desc {
                font-size: 16px;
            }

            .section {
                padding: 64px 0;
            }

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

            .cta-wrap {
                flex-direction: column;
                text-align: center;
            }

            .nav-cta {
                display: none;
            }

            .security-wrap ul {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 520px) {
            .help-grid {
                grid-template-columns: 1fr;
            }

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

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

            .logo {
                font-size: 17px;
            }

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

            .hero-actions {
                flex-direction: column;
            }

            .btn-primary,
            .btn-ghost {
                width: 100%;
                justify-content: center;
            }

            .flow-step {
                gap: 14px;
            }

            .step-num {
                width: 44px;
                height: 44px;
                font-size: 16px;
            }

            .flow-step:not(:last-child)::after {
                left: 21px;
            }
        }