/* roulang page: index */
:root {
            --bg: #070C18;
            --bg-secondary: #0B1322;
            --bg-section: #0D1627;
            --glass-bg: rgba(16, 24, 48, 0.55);
            --glass-border: rgba(255, 255, 255, 0.08);
            --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.06);
            --primary: #2E7CF6;
            --primary-2: #00D9FF;
            --purple: #7A5CFF;
            --success: #34D399;
            --warning: #F59E0B;
            --text-main: #E6F1FF;
            --text-sub: #9AA9BD;
            --text-weak: #5B6B82;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 10px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.28);
            --shadow-glow: 0 0 24px rgba(46, 124, 246, 0.35);
            --font-base: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-base);
            background: var(--bg);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
        }

        img {
            max-width: 100%;
            display: block;
            border-radius: 12px;
        }

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

        button {
            cursor: pointer;
        }

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

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

        .section {
            padding: 80px 0;
        }

        .section-head {
            margin-bottom: 48px;
            display: flex;
            flex-wrap: wrap;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
        }

        .section-head h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            color: var(--text-main);
            padding-left: 16px;
            border-left: 4px solid var(--primary);
            line-height: 1.3;
        }

        .section-head .section-desc {
            color: var(--text-sub);
            font-size: 15px;
            max-width: 560px;
        }

        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            background: rgba(122, 92, 255, 0.12);
            color: var(--purple);
            font-size: 13px;
            font-weight: 500;
            border: 1px solid rgba(122, 92, 255, 0.25);
            letter-spacing: 0.02em;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all 0.25s ease;
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-2));
            color: #fff;
            box-shadow: var(--shadow-glow);
        }

        .btn-primary:hover {
            box-shadow: 0 0 30px rgba(46, 124, 246, 0.55);
            background: linear-gradient(135deg, #3f86ff, #12dfff);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: scale(0.98);
            box-shadow: 0 0 12px rgba(46, 124, 246, 0.3);
        }

        .btn-ghost {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.25);
            color: var(--text-main);
        }

        .btn-ghost:hover {
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
            background: rgba(255, 255, 255, 0.03);
        }

        .btn-text {
            padding: 6px 4px;
            color: var(--text-sub);
            font-size: 14px;
        }

        .btn-text:hover {
            color: var(--primary-2);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
        }

        .animate-up {
            animation: fadeUp 0.45s ease both;
        }

        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

        /* ========== Header ========== */
        .site-header {
            position: relative;
            z-index: 100;
            background: rgba(7, 12, 24, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .header-brand-row {
            height: 64px;
            display: flex;
            align-items: center;
        }

        .header-brand-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 24px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-2));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 0 14px rgba(46, 124, 246, 0.35);
        }

        .brand-logo .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.01em;
            line-height: 1.2;
        }

        .brand-logo .logo-text span {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-sub);
            display: block;
            letter-spacing: 0.06em;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            padding: 0 12px;
            height: 38px;
            transition: border-color 0.25s, box-shadow 0.25s;
        }

        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 124, 246, 0.2);
        }

        .header-search i {
            color: var(--text-weak);
            font-size: 14px;
            margin-right: 8px;
        }

        .header-search input {
            background: transparent;
            border: none;
            color: var(--text-main);
            font-size: 14px;
            width: 160px;
            transition: width 0.3s;
        }

        .header-search input::placeholder {
            color: var(--text-weak);
        }

        .header-search input:focus {
            width: 200px;
        }

        .header-nav-row {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            position: relative;
        }

        .main-nav {
            display: flex;
            gap: 8px;
            height: 48px;
            align-items: stretch;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }

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

        .nav-link {
            display: flex;
            align-items: center;
            padding: 0 20px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            border-bottom: 2px solid transparent;
            white-space: nowrap;
            transition: color 0.25s, background 0.25s, border-color 0.25s;
        }

        .nav-link:hover {
            color: var(--text-main);
            background: rgba(46, 124, 246, 0.08);
        }

        .nav-link.active {
            color: var(--text-main);
            border-bottom-color: var(--primary);
            background: rgba(46, 124, 246, 0.12);
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 38px;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 8px;
            color: var(--text-main);
            font-size: 18px;
        }

        .nav-toggle:hover {
            border-color: var(--primary);
        }

        /* ========== Hero ========== */
        .hero {
            position: relative;
            min-height: 70vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg,
                    rgba(7, 12, 24, 0.7) 0%,
                    rgba(7, 12, 24, 0.35) 45%,
                    rgba(7, 12, 24, 0.85) 100%);
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            padding: 100px 0;
            width: 100%;
        }

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

        .hero-badge {
            margin-bottom: 24px;
        }

        .hero-title {
            font-size: clamp(32px, 5vw, 56px);
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 24px;
            color: var(--text-main);
        }

        .hero-title .gradient-text {
            background: linear-gradient(135deg, var(--primary), var(--primary-2));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-subtitle {
            font-size: 18px;
            color: #B3C3D9;
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 520px;
        }

        .hero-cta {
            display: flex;
            gap: 16px;
            align-items: center;
            flex-wrap: wrap;
        }

        .hero-note {
            margin-top: 40px;
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            color: var(--text-weak);
            font-size: 13px;
        }

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

        .hero-note i {
            color: var(--success);
        }

        /* ========== Features ========== */
        .features-section {
            background: var(--bg-secondary);
        }

        .features-layout {
            display: flex;
            gap: 56px;
            align-items: flex-start;
        }

        .features-intro {
            flex: 0 0 320px;
        }

        .features-intro h2 {
            margin-bottom: 20px;
        }

        .features-intro p {
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 20px;
        }

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

        .feature-item {
            background: rgba(16, 24, 48, 0.55);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 30px 26px;
            box-shadow: var(--shadow-card);
            box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.06);
            transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
        }

        .feature-item:hover {
            border-color: rgba(255, 255, 255, 0.14);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.1);
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(46, 124, 246, 0.15);
            border: 1px solid rgba(46, 124, 246, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary-2);
            margin-bottom: 18px;
        }

        .feature-item h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .feature-item p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.7;
        }

        /* ========== Scenes ========== */
        .scenes-grid {
            display: flex;
            gap: 24px;
            align-items: stretch;
        }

        .scene-card {
            flex: 1;
            background: rgba(16, 24, 48, 0.45);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            display: flex;
            flex-direction: column;
            transition: all 0.3s;
        }

        .scene-card:hover {
            border-color: rgba(255, 255, 255, 0.14);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        .scene-card.scene-featured {
            flex: 1.3;
            background: rgba(16, 24, 48, 0.75);
            border-color: rgba(46, 124, 246, 0.35);
            padding: 44px 36px;
        }

        .scene-card.scene-featured:hover {
            border-color: rgba(46, 124, 246, 0.6);
        }

        .scene-icon {
            font-size: 34px;
            margin-bottom: 20px;
            color: var(--primary);
        }

        .scene-card.scene-featured .scene-icon {
            color: var(--primary-2);
        }

        .scene-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .scene-card p {
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .scene-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }

        .scene-meta span {
            color: var(--text-weak);
            font-size: 13px;
        }

        .scene-meta a {
            color: var(--primary-2);
            font-size: 14px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* ========== Stats & Cases ========== */
        .stats-section {
            background: var(--bg-secondary);
        }

        .stats-row {
            display: flex;
            gap: 40px;
            margin-bottom: 56px;
            flex-wrap: wrap;
            justify-content: space-between;
        }

        .stat-item {
            text-align: center;
            flex: 1;
            min-width: 180px;
        }

        .stat-number {
            font-size: clamp(36px, 4vw, 52px);
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--primary-2));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            display: block;
            line-height: 1.2;
        }

        .stat-label {
            color: var(--text-sub);
            font-size: 14px;
            margin-top: 8px;
        }

        .cases-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .case-card {
            background: rgba(16, 24, 48, 0.5);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            transition: all 0.3s;
        }

        .case-card:hover {
            border-color: rgba(255, 255, 255, 0.14);
            box-shadow: var(--shadow-card);
        }

        .case-card img {
            width: 200px;
            height: auto;
            object-fit: cover;
            flex-shrink: 0;
        }

        .case-body {
            padding: 24px;
        }

        .case-body h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .case-body p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .case-tag {
            color: var(--purple);
            font-size: 13px;
        }

        /* ========== Pricing ========== */
        .pricing-grid {
            display: flex;
            gap: 28px;
            align-items: stretch;
            perspective: 1200px;
        }

        .pricing-card {
            flex: 1;
            background: rgba(16, 24, 48, 0.5);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-card);
            transition: all 0.3s;
        }

        .pricing-card:hover {
            border-color: rgba(255, 255, 255, 0.14);
            transform: translateY(-3px);
            box-shadow: 0 14px 36px rgba(0, 0, 0, 0.4);
        }

        .pricing-card.recommended {
            background: rgba(16, 24, 48, 0.8);
            border-color: rgba(46, 124, 246, 0.4);
            box-shadow: 0 0 30px rgba(46, 124, 246, 0.15), var(--shadow-card);
        }

        .pricing-name {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .pricing-desc {
            color: var(--text-weak);
            font-size: 14px;
            margin-bottom: 24px;
        }

        .pricing-price {
            display: flex;
            align-items: baseline;
            gap: 8px;
            margin-bottom: 24px;
        }

        .price-value {
            font-size: 42px;
            font-weight: 700;
            color: var(--text-main);
        }

        .price-unit {
            color: var(--text-weak);
            font-size: 14px;
        }

        .pricing-list {
            list-style: none;
            padding: 0;
            margin: 0 0 28px;
            flex-grow: 1;
        }

        .pricing-list li {
            padding: 9px 0;
            color: var(--text-sub);
            font-size: 14px;
            display: flex;
            gap: 10px;
            align-items: center;
        }

        .pricing-list li i {
            color: var(--success);
            font-size: 13px;
            flex-shrink: 0;
        }

        .recommend-tag {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(135deg, var(--primary), var(--primary-2));
            color: #fff;
            padding: 4px 18px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            white-space: nowrap;
        }

        .pricing-card.recommended {
            position: relative;
        }

        /* ========== News ========== */
        .news-section {
            background: var(--bg-secondary);
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .news-card {
            display: flex;
            background: rgba(16, 24, 48, 0.4);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            gap: 24px;
            align-items: center;
            transition: all 0.3s;
        }

        .news-card:hover {
            border-color: rgba(255, 255, 255, 0.14);
            background: rgba(16, 24, 48, 0.6);
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }

        .news-left {
            flex-shrink: 0;
            width: 110px;
            text-align: center;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .news-cat {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            background: rgba(46, 124, 246, 0.12);
            border: 1px solid rgba(46, 124, 246, 0.25);
            color: var(--primary-2);
            font-size: 13px;
            font-weight: 500;
        }

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

        .news-body {
            flex: 1;
        }

        .news-body h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-body p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-link {
            display: block;
            margin-top: 10px;
            color: var(--primary-2);
            font-size: 13px;
        }

        .empty-state {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 48px 24px;
            background: rgba(16, 24, 48, 0.3);
            border-radius: var(--radius-lg);
            border: 1px dashed rgba(255, 255, 255, 0.12);
            color: var(--text-weak);
            gap: 12px;
        }

        .empty-state i {
            font-size: 40px;
            color: var(--text-weak);
            opacity: 0.6;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: rgba(16, 24, 48, 0.5);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.3s, box-shadow 0.3s;
        }

        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.14);
        }

        .faq-item.active {
            border-color: rgba(46, 124, 246, 0.4);
        }

        .faq-q {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 0 20px;
            height: 52px;
            cursor: pointer;
        }

        .faq-num {
            color: var(--primary-2);
            font-size: 14px;
            font-weight: 600;
            flex-shrink: 0;
        }

        .faq-q-text {
            flex: 1;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
        }

        .faq-icon {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-sub);
            font-size: 13px;
            transition: all 0.3s;
            flex-shrink: 0;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            border-color: var(--primary);
            color: var(--primary-2);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-item.active .faq-a {
            max-height: 300px;
        }

        .faq-a-inner {
            padding: 0 20px 18px 50px;
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.7;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-section);
        }

        .cta-banner {
            position: relative;
            background: linear-gradient(135deg, #0A1426 0%, #0D1F3F 50%, #0A1D38 100%);
            border-radius: 24px;
            padding: 64px 48px;
            text-align: center;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -60%;
            left: -20%;
            width: 60%;
            height: 220%;
            background: radial-gradient(circle, rgba(46, 124, 246, 0.25) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-banner::after {
            content: '';
            position: absolute;
            bottom: -60%;
            right: -20%;
            width: 55%;
            height: 220%;
            background: radial-gradient(circle, rgba(0, 217, 255, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
        }

        .cta-inner h2 {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 700;
            margin-bottom: 14px;
        }

        .cta-inner p {
            color: var(--text-sub);
            font-size: 15px;
            margin-bottom: 28px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #060A14;
            padding: 64px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-col h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
            color: var(--text-main);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 18px;
        }

        .footer-brand .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-2));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #fff;
        }

        .footer-brand .logo-text {
            font-size: 17px;
            font-weight: 700;
        }

        .footer-desc {
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.7;
        }

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

        .footer-col ul a {
            color: var(--text-sub);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul a:hover {
            color: var(--primary-2);
        }

        .footer-col ul a i {
            font-size: 12px;
            color: var(--text-weak);
        }

        .footer-compliance {
            color: var(--text-weak);
            font-size: 13px;
            line-height: 1.7;
        }

        .footer-compliance p {
            margin-bottom: 8px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 20px 0;
            text-align: center;
            color: var(--text-weak);
            font-size: 13px;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .features-layout {
                flex-direction: column;
                gap: 32px;
            }
            .features-intro {
                flex: none;
                max-width: 100%;
            }
            .scenes-grid {
                flex-wrap: wrap;
            }
            .scene-card {
                flex: 1 1 45%;
                min-width: 220px;
            }
            .scene-card.scene-featured {
                flex: 1 1 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section {
                padding: 48px 0;
            }
            .header-brand-inner {
                gap: 12px;
            }
            .header-search {
                display: none;
            }
            .header-brand-row {
                height: 58px;
            }
            .header-nav-row {
                position: absolute;
                top: 58px;
                left: 0;
                right: 0;
                background: rgba(7, 12, 24, 0.96);
                backdrop-filter: blur(20px);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.3s ease;
            }
            .header-nav-row.open {
                max-height: 200px;
            }
            .main-nav {
                flex-direction: column;
                height: auto;
                padding: 8px 0;
                overflow-y: auto;
            }
            .nav-link {
                padding: 12px 16px;
                border-bottom: none;
                border-left: 2px solid transparent;
                justify-content: flex-start;
            }
            .nav-link.active {
                border-left-color: var(--primary);
                background: rgba(46, 124, 246, 0.1);
                border-bottom: none;
            }
            .nav-toggle {
                display: flex;
            }
            .hero {
                min-height: auto;
            }
            .hero-inner {
                padding: 60px 0;
            }
            .hero-title {
                font-size: 32px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .scenes-grid {
                display: grid;
                grid-template-columns: 1fr;
            }
            .scene-card.scene-featured {
                order: -1;
            }
            .stats-row {
                gap: 24px;
            }
            .cases-row {
                grid-template-columns: 1fr;
            }
            .case-card {
                flex-direction: column;
            }
            .case-card img {
                width: 100%;
                height: 160px;
            }
            .pricing-grid {
                flex-direction: column;
            }
            .news-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .news-left {
                width: auto;
                flex-direction: row;
                align-items: center;
                gap: 12px;
            }
            .cta-banner {
                padding: 40px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 32px;
            }
            .faq-a-inner {
                padding-left: 20px;
            }
        }

        @media (max-width: 520px) {
            .btn {
                padding: 10px 18px;
                font-size: 14px;
            }
            .hero-cta {
                flex-direction: column;
                align-items: stretch;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .feature-item {
                padding: 24px 20px;
            }
            .news-card {
                padding: 16px;
            }
            .cta-banner {
                padding: 32px 20px;
            }
            .pricing-card {
                padding: 28px 24px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #070C18;
            --bg-secondary: #0B1322;
            --bg-section: #0D1627;
            --glass-bg: rgba(16, 24, 48, 0.55);
            --glass-border: rgba(255, 255, 255, 0.08);
            --primary: #2E7CF6;
            --cyan: #00D9FF;
            --accent: #7A5CFF;
            --success: #34D399;
            --warning: #F59E0B;
            --text-primary: #E6F1FF;
            --text-secondary: #9AA9BD;
            --text-muted: #5B6B82;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-btn: 10px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.28);
            --shadow-glass: 0 8px 24px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.06);
            --shadow-glow: 0 0 24px rgba(46, 124, 246, 0.35), 0 0 60px rgba(0, 217, 255, 0.18);
            --container-w: 1200px;
            --header-brand-h: 64px;
            --header-nav-h: 48px;
            --transition: 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        .gradient-text {
            background: linear-gradient(135deg, var(--primary), var(--cyan));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        /* ========== Header ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(7, 12, 24, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .header-brand-row {
            height: var(--header-brand-h);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .header-brand-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            box-shadow: 0 4px 16px rgba(46, 124, 246, 0.3);
            flex-shrink: 0;
        }

        .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            line-height: 1.3;
        }

        .logo-text span {
            display: block;
            font-size: 11px;
            font-weight: 400;
            color: var(--text-muted);
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

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

        .header-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            padding: 0 14px;
            height: 36px;
            width: 240px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 124, 246, 0.18);
        }

        .header-search i {
            color: var(--text-muted);
            font-size: 13px;
        }

        .header-search input {
            flex: 1;
            background: transparent;
            color: var(--text-primary);
            font-size: 13px;
            height: 100%;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--cyan));
            color: #fff;
            padding: 10px 22px;
            box-shadow: 0 4px 16px rgba(46, 124, 246, 0.3);
        }

        .btn-primary:hover {
            box-shadow: 0 6px 24px rgba(46, 124, 246, 0.45);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: scale(0.98);
            box-shadow: 0 2px 12px rgba(46, 124, 246, 0.25);
        }

        .btn-sm {
            padding: 7px 16px;
            font-size: 13px;
        }

        .nav-toggle {
            display: none;
            width: 38px;
            height: 38px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-primary);
            font-size: 15px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
        }

        .nav-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .header-nav-row {
            height: var(--header-nav-h);
            overflow: visible;
            transition: all var(--transition);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            height: 100%;
        }

        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            height: 100%;
            padding: 0 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color var(--transition), background var(--transition);
            border-radius: 6px 6px 0 0;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(46, 124, 246, 0.08);
        }

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

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--cyan));
            border-radius: 2px 2px 0 0;
        }

        /* ========== Buttons ========== */
        .btn-outline {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
            padding: 10px 22px;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-1px);
        }

        .btn-glow {
            background: linear-gradient(135deg, var(--primary), var(--cyan));
            color: #fff;
            padding: 14px 32px;
            font-size: 15px;
            box-shadow: var(--shadow-glow);
            border-radius: var(--radius-btn);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .btn-glow:hover {
            transform: scale(1.02);
            box-shadow: 0 0 30px rgba(46, 124, 246, 0.5), 0 0 80px rgba(0, 217, 255, 0.25);
        }

        .btn-glow:active {
            transform: scale(0.98);
        }

        /* ========== Hero Page ========== */
        .hero-page {
            position: relative;
            padding: 72px 0 56px;
            background:
                linear-gradient(rgba(7, 12, 24, 0.7), rgba(7, 12, 24, 0.4), rgba(7, 12, 24, 0.8)),
                url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            text-align: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .hero-page h1 {
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 12px;
            letter-spacing: 0.01em;
        }

        .hero-page .hero-sub {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 20px;
            line-height: 1.7;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 10px;
        }

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

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

        .breadcrumb i {
            font-size: 10px;
            color: var(--text-muted);
        }

        /* ========== Page Intro ========== */
        .page-intro {
            padding: 80px 0;
            background: var(--bg-primary);
        }

        .intro-block {
            display: flex;
            align-items: center;
            gap: 48px;
        }

        .intro-text {
            flex: 1;
        }

        .intro-text .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(46, 124, 246, 0.12);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 18px;
            letter-spacing: 0.04em;
        }

        .intro-text h2 {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 18px;
            padding-left: 14px;
            border-left: 4px solid var(--primary);
        }

        .intro-text p {
            color: var(--text-secondary);
            line-height: 1.85;
            font-size: 15px;
            margin-bottom: 16px;
        }

        .intro-image {
            flex: 1;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            position: relative;
        }

        .intro-image::after {
            content: "";
            position: absolute;
            inset: 0;
            border-radius: var(--radius-lg);
            border: 1px solid var(--glass-border);
            pointer-events: none;
        }

        .intro-image img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .intro-image:hover img {
            transform: scale(1.02);
        }

        /* ========== Entry Flow ========== */
        .entry-flow {
            padding: 80px 0;
            background: var(--bg-section);
            border-top: 1px solid rgba(255, 255, 255, 0.03);
            border-bottom: 1px solid rgba(255, 255, 255, 0.03);
        }

        .section-title-wrap {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-title-wrap .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(46, 124, 246, 0.12);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }

        .section-title-wrap h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 12px;
            padding-left: 14px;
            border-left: 4px solid var(--primary);
            display: inline-block;
            text-align: left;
        }

        .section-title-wrap .section-desc {
            color: var(--text-secondary);
            font-size: 14px;
            max-width: 620px;
            margin: 0 auto;
        }

        .entry-list {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .entry-item {
            display: flex;
            align-items: center;
            gap: 36px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-glass);
            transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
        }

        .entry-item:hover {
            border-color: rgba(255, 255, 255, 0.14);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
        }

        .entry-item.reverse {
            flex-direction: row-reverse;
        }

        .entry-image {
            width: 42%;
            flex-shrink: 0;
            border-radius: var(--radius-md);
            overflow: hidden;
            position: relative;
        }

        .entry-image::after {
            content: "";
            position: absolute;
            inset: 0;
            border-radius: var(--radius-md);
            border: 1px solid var(--glass-border);
            pointer-events: none;
        }

        .entry-image img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .entry-item:hover .entry-image img {
            transform: scale(1.03);
        }

        .entry-content {
            flex: 1;
        }

        .entry-content .entry-tag {
            display: inline-flex;
            align-items: center;
            background: rgba(122, 92, 255, 0.14);
            color: var(--accent);
            font-size: 11px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.04em;
        }

        .entry-content h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .entry-content p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .entry-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            transition: gap var(--transition), color var(--transition);
        }

        .entry-more:hover {
            color: var(--cyan);
            gap: 10px;
        }

        /* ========== Mini Cards ========== */
        .mini-cards-sec {
            padding: 80px 0;
            background: var(--bg-primary);
        }

        .mini-grid {
            display: flex;
            gap: 28px;
        }

        .mini-card {
            flex: 1;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-glass);
            transition: all var(--transition);
        }

        .mini-card:hover {
            border-color: rgba(255, 255, 255, 0.14);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
        }

        .mini-card .card-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(46, 124, 246, 0.2), rgba(0, 217, 255, 0.2));
            border: 1px solid rgba(46, 124, 246, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary);
            margin-bottom: 16px;
        }

        .mini-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .mini-card p {
            color: var(--text-secondary);
            font-size: 13px;
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .mini-card ul {
            margin-bottom: 16px;
        }

        .mini-card ul li {
            color: var(--text-secondary);
            font-size: 13px;
            padding: 4px 0;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .mini-card ul li i {
            color: var(--success);
            font-size: 11px;
        }

        .mini-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            transition: gap var(--transition), color var(--transition);
        }

        .mini-card .card-link:hover {
            color: var(--cyan);
            gap: 10px;
        }

        /* ========== FAQ ========== */
        .faq-sec {
            padding: 80px 0;
            background: var(--bg-section);
            border-top: 1px solid rgba(255, 255, 255, 0.03);
            border-bottom: 1px solid rgba(255, 255, 255, 0.03);
        }

        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-glass);
            overflow: hidden;
            transition: border-color var(--transition);
        }

        .faq-item.open {
            border-color: rgba(46, 124, 246, 0.35);
        }

        .faq-question {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 15px 20px;
            cursor: pointer;
            user-select: none;
            min-height: 48px;
        }

        .faq-num {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            background: rgba(46, 124, 246, 0.12);
            border-radius: 50%;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .faq-question-text {
            flex: 1;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            line-height: 1.5;
        }

        .faq-icon {
            font-size: 14px;
            color: var(--text-secondary);
            transition: transform 0.3s ease, color 0.3s ease;
            flex-shrink: 0;
        }

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

        .faq-answer {
            padding: 0 20px 20px 60px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 20px;
            padding-top: 0;
        }

        /* ========== CTA ========== */
        .cta-sec {
            padding: 80px 0;
            background: var(--bg-primary);
            position: relative;
        }

        .cta-box {
            position: relative;
            background: var(--bg-secondary);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .cta-box::before {
            content: "";
            position: absolute;
            top: -80px;
            left: 50%;
            transform: translateX(-50%);
            width: 400px;
            height: 200px;
            background: radial-gradient(ellipse, rgba(46, 124, 246, 0.2), transparent 70%);
            pointer-events: none;
        }

        .cta-box h2 {
            font-size: clamp(24px, 3.5vw, 32px);
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
        }

        .cta-box p {
            color: var(--text-secondary);
            font-size: 14px;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
            position: relative;
        }

        .cta-box .btn-wrap {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 60px;
        }

        .footer-grid {
            display: flex;
            gap: 40px;
            padding-bottom: 40px;
            flex-wrap: wrap;
        }

        .footer-col {
            flex: 1;
            min-width: 200px;
        }

        .footer-col:first-child {
            flex: 1.4;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 14px;
            border-radius: 8px;
        }

        .footer-brand .logo-text {
            font-size: 16px;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 13px;
            line-height: 1.7;
            margin-bottom: 12px;
            max-width: 300px;
        }

        .footer-col h3 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-muted);
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul li a i {
            font-size: 10px;
            color: var(--primary);
        }

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

        .footer-compliance p {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 8px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ========== Animations ========== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .anim-fade-up {
            animation: fadeUp 0.4s ease both;
        }

        .delay-1 {
            animation-delay: 0.05s;
        }
        .delay-2 {
            animation-delay: 0.1s;
        }
        .delay-3 {
            animation-delay: 0.15s;
        }
        .delay-4 {
            animation-delay: 0.2s;
        }

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

        /* ========== Focus Visible ========== */
        :focus-visible {
            outline: 2px solid var(--cyan);
            outline-offset: 2px;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .header-search {
                width: 180px;
            }

            .entry-item,
            .entry-item.reverse {
                flex-direction: column;
                gap: 20px;
            }

            .entry-image {
                width: 100%;
            }

            .entry-image img {
                height: 220px;
            }

            .intro-block {
                flex-direction: column;
                gap: 32px;
            }

            .intro-image {
                width: 100%;
            }
        }

        @media (max-width: 768px) {
            .header-brand-inner {
                padding: 0 16px;
            }

            .header-search {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .header-nav-row {
                height: auto;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s ease;
            }

            .header-nav-row.open {
                max-height: 400px;
                border-top: 1px solid rgba(255, 255, 255, 0.06);
            }

            .main-nav {
                flex-direction: column;
                align-items: stretch;
                padding: 8px 0;
            }

            .nav-link {
                height: 44px;
                justify-content: center;
                border-radius: 8px;
            }

            .nav-link.active::after {
                display: none;
            }

            .nav-link.active {
                background: rgba(46, 124, 246, 0.12);
            }

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

            .hero-page h1 {
                font-size: 28px;
            }

            .page-intro,
            .entry-flow,
            .mini-cards-sec,
            .faq-sec,
            .cta-sec {
                padding: 48px 0;
            }

            .footer-grid {
                flex-direction: column;
                gap: 28px;
            }

            .footer-col:first-child {
                flex: 1;
            }

            .mini-grid {
                flex-direction: column;
            }

            .faq-item.open .faq-answer {
                padding-left: 20px;
            }

            .cta-box {
                padding: 36px 24px;
            }

            .header-actions .btn-sm {
                padding: 7px 12px;
                font-size: 12px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 12px;
            }

            .brand-logo .logo-text {
                font-size: 15px;
            }

            .logo-text span {
                font-size: 10px;
            }

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

            .hero-page .hero-sub {
                font-size: 13px;
            }

            .breadcrumb {
                font-size: 12px;
                flex-wrap: wrap;
            }

            .entry-item {
                padding: 16px;
            }

            .entry-content h3 {
                font-size: 17px;
            }

            .entry-content p {
                font-size: 13px;
            }

            .section-title-wrap h2 {
                font-size: 21px;
            }

            .faq-question {
                padding: 12px 14px;
            }

            .faq-question-text {
                font-size: 13px;
            }

            .faq-answer {
                padding-left: 14px;
                padding-right: 14px;
                font-size: 13px;
            }

            .cta-box {
                padding: 28px 16px;
            }

            .cta-box h2 {
                font-size: 20px;
            }

            .cta-box p {
                font-size: 13px;
            }

            .btn-glow {
                padding: 12px 22px;
                font-size: 14px;
            }

            .footer-bottom p {
                font-size: 11px;
                padding: 0 10px;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #070C18;
            --bg-secondary: #0B1322;
            --bg-section: #0D1627;
            --glass-bg: rgba(16, 24, 48, 0.55);
            --glass-border: rgba(255, 255, 255, 0.08);
            --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.06);
            --primary: #2E7CF6;
            --accent: #00D9FF;
            --violet: #7A5CFF;
            --success: #34D399;
            --warning: #F59E0B;
            --text-main: #E6F1FF;
            --text-secondary: #9AA9BD;
            --text-muted: #5B6B82;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.28);
            --shadow-glow: 0 0 24px rgba(46, 124, 246, 0.35);
            --font-primary: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-primary);
            background: var(--bg-primary);
            color: var(--text-main);
            line-height: 1.8;
            font-size: 16px;
            padding-top: 112px;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }

        button:focus-visible, input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        ul, ol {
            padding-left: 1.4em;
        }

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

        .container-narrow {
            max-width: 780px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: var(--shadow-glow);
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #3b88ff, #0ee2ff);
            box-shadow: 0 0 32px rgba(46, 124, 246, 0.5);
            transform: scale(1.02);
        }

        .btn-primary:active {
            transform: scale(0.98);
            box-shadow: 0 0 16px rgba(46, 124, 246, 0.25);
        }

        .btn-secondary {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-main);
        }

        .btn-secondary:hover {
            border-color: rgba(255, 255, 255, 0.45);
            background: rgba(255, 255, 255, 0.04);
        }

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

        .btn-block {
            width: 100%;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 200;
            background: rgba(7, 12, 24, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .header-brand-row {
            height: 64px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.03);
        }

        .header-brand-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            box-shadow: 0 4px 14px rgba(46, 124, 246, 0.4);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
            display: flex;
            flex-direction: column;
        }

        .logo-text span {
            font-size: 11px;
            font-weight: 400;
            color: var(--text-secondary);
            letter-spacing: 0.04em;
        }

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

        .header-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            padding: 8px 14px;
            width: 220px;
            transition: var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 124, 246, 0.15);
        }

        .header-search i {
            color: var(--text-muted);
            font-size: 14px;
            margin-right: 8px;
        }

        .header-search input {
            background: transparent;
            border: none;
            color: var(--text-main);
            font-size: 14px;
            width: 100%;
        }

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

        .nav-toggle {
            display: none;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            color: var(--text-main);
            width: 42px;
            height: 42px;
            cursor: pointer;
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.2);
        }

        .header-nav-row {
            height: 48px;
            display: flex;
            align-items: center;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            height: 100%;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            height: 100%;
            padding: 0 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 2px solid transparent;
            transition: var(--transition);
            position: relative;
        }

        .nav-link:hover {
            color: var(--text-main);
            background: rgba(46, 124, 246, 0.06);
        }

        .nav-link.active {
            color: var(--text-main);
            border-bottom-color: var(--primary);
            background: rgba(46, 124, 246, 0.1);
        }

        .article-hero {
            background: linear-gradient(180deg, rgba(10, 18, 34, 0.5) 0%, var(--bg-primary) 100%);
            padding: 55px 0 35px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 22px;
        }

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

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

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

        .breadcrumb .current {
            color: var(--text-secondary);
            max-width: 320px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .article-hero h1 {
            font-size: clamp(26px, 4vw, 40px);
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 20px;
            letter-spacing: 0.01em;
            max-width: 900px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 13px;
            color: var(--text-muted);
        }

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

        .meta-item i {
            font-size: 14px;
            color: var(--primary);
        }

        .article-body {
            padding: 50px 0 30px;
        }

        .article-content {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
        }

        .article-content p {
            margin-bottom: 1.2em;
        }

        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            margin: 1.6em 0 0.8em;
            padding-left: 14px;
            border-left: 4px solid var(--primary);
            line-height: 1.4;
            color: var(--text-main);
        }

        .article-content h3 {
            font-size: 19px;
            font-weight: 600;
            margin: 1.4em 0 0.6em;
            color: var(--text-main);
            line-height: 1.5;
        }

        .article-content h4 {
            font-size: 17px;
            font-weight: 600;
            margin: 1.2em 0 0.5em;
            color: var(--text-secondary);
        }

        .article-content ul, .article-content ol {
            margin-bottom: 1.2em;
            padding-left: 1.6em;
            color: var(--text-secondary);
        }

        .article-content li {
            margin-bottom: 0.45em;
        }

        .article-content blockquote {
            border-left: 3px solid var(--primary);
            padding: 14px 20px;
            margin: 1.5em 0;
            background: rgba(46, 124, 246, 0.06);
            border-radius: 0 10px 10px 0;
            color: var(--text-secondary);
            font-style: normal;
        }

        .article-content img {
            border-radius: var(--radius-lg);
            margin: 1.5em auto;
            box-shadow: var(--shadow-card);
        }

        .article-content a {
            color: var(--accent);
            border-bottom: 1px solid rgba(0, 217, 255, 0.3);
        }

        .article-content a:hover {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            background: var(--bg-secondary);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            overflow: hidden;
            font-size: 14px;
        }

        .article-content th {
            background: rgba(46, 124, 246, 0.14);
            color: var(--text-main);
            font-weight: 600;
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .article-content td {
            padding: 11px 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-secondary);
        }

        .article-content tr:last-child td {
            border-bottom: none;
        }

        .article-content strong {
            color: var(--text-main);
            font-weight: 600;
        }

        .article-content hr {
            border: none;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin: 2em 0;
        }

        .related-posts {
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .section-head {
            margin-bottom: 32px;
        }

        .section-title {
            font-size: clamp(22px, 3vw, 28px);
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 8px;
        }

        .title-bar {
            width: 4px;
            height: 24px;
            background: linear-gradient(180deg, var(--primary), var(--accent));
            border-radius: 2px;
            display: inline-block;
        }

        .section-subtitle {
            color: var(--text-muted);
            font-size: 14px;
        }

        .related-grid {
            display: flex;
            flex-wrap: wrap;
            margin: -12px;
        }

        .related-cell {
            padding: 12px;
            flex: 1 1 33.333%;
            max-width: 33.333%;
        }

        @media (max-width: 1024px) {
            .related-cell {
                flex: 1 1 50%;
                max-width: 50%;
            }
        }

        @media (max-width: 640px) {
            .related-cell {
                flex: 1 1 100%;
                max-width: 100%;
            }
        }

        .related-card {
            display: flex;
            flex-direction: column;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            height: 100%;
        }

        .related-card:hover {
            border-color: rgba(255, 255, 255, 0.14);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
            transform: translateY(-3px);
        }

        .related-cover {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-secondary);
        }

        .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .related-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(7, 12, 24, 0.72);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.14);
            color: var(--text-main);
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.03em;
        }

        .related-info {
            padding: 18px 20px 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }

        .related-info h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.5;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .related-info p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .back-section {
            padding: 30px 0 50px;
        }

        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            transition: var(--transition);
        }

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

        .back-link i {
            font-size: 15px;
        }

        .article-empty {
            min-height: 55vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            gap: 18px;
            padding: 60px 20px;
        }

        .article-empty .empty-icon {
            width: 72px;
            height: 72px;
            background: rgba(46, 124, 246, 0.1);
            border: 1px solid rgba(46, 124, 246, 0.25);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .article-empty h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
        }

        .article-empty p {
            color: var(--text-muted);
            font-size: 14px;
            max-width: 360px;
        }

        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 50px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
        }

        .footer-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 28px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
        }

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

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

        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: var(--transition);
        }

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

        .footer-col ul li a i {
            font-size: 12px;
            margin-right: 6px;
            color: var(--primary);
        }

        .footer-compliance {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: var(--radius-sm);
            padding: 16px;
        }

        .footer-compliance p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 10px;
        }

        .footer-compliance p:last-child {
            margin-bottom: 0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 20px 0;
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }

            .header-search {
                width: 160px;
            }
        }

        @media (max-width: 768px) {
            body {
                padding-top: 64px;
            }

            .header-brand-row {
                height: 64px;
            }

            .header-search {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .header-nav-row {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                height: auto;
                background: rgba(7, 12, 24, 0.97);
                backdrop-filter: blur(20px);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.35s ease;
                z-index: 199;
            }

            .header-nav-row.nav-open {
                max-height: 200px;
            }

            .main-nav {
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0;
            }

            .nav-link {
                height: 46px;
                padding: 0 24px;
                border-bottom: none;
                border-left: 3px solid transparent;
            }

            .nav-link:hover {
                background: rgba(46, 124, 246, 0.08);
                border-left-color: var(--primary);
            }

            .nav-link.active {
                border-bottom: none;
                border-left-color: var(--primary);
                background: rgba(46, 124, 246, 0.1);
            }

            .article-hero {
                padding: 40px 0 25px;
            }

            .article-meta {
                gap: 14px;
            }

            .related-cell {
                flex: 1 1 100%;
                max-width: 100%;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }

            .container-narrow {
                padding: 0 16px;
            }

            .header-actions {
                gap: 10px;
            }

            .header-actions .btn-sm {
                padding: 8px 14px;
                font-size: 13px;
            }

            .article-hero h1 {
                font-size: 24px;
            }

            .breadcrumb .current {
                max-width: 180px;
            }

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

            .article-content h3 {
                font-size: 17px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom p {
                font-size: 12px;
            }
        }

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

        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(16px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .article-hero, .article-body, .related-posts, .back-section {
            animation: fadeUp 0.4s ease both;
        }

        .article-body {
            animation-delay: 0.05s;
        }

        .related-posts {
            animation-delay: 0.1s;
        }

        .back-section {
            animation-delay: 0.15s;
        }

/* roulang page: category2 */
:root {
            --bg-primary: #070C18;
            --bg-secondary: #0B1322;
            --bg-tertiary: #0D1627;
            --glass-bg: rgba(16, 24, 48, 0.55);
            --glass-border: rgba(255, 255, 255, 0.08);
            --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.06);
            --primary: #2E7CF6;
            --secondary: #00D9FF;
            --accent: #7A5CFF;
            --success: #34D399;
            --warning: #F59E0B;
            --text-primary: #E6F1FF;
            --text-secondary: #9AA9BD;
            --text-muted: #5B6B82;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 10px;
            --radius-badge: 20px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.28);
            --shadow-glow: 0 4px 24px rgba(46, 124, 246, 0.45);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image: radial-gradient(ellipse at 20% 0%, rgba(46, 124, 246, 0.10) 0%, transparent 60%), radial-gradient(ellipse at 80% 40%, rgba(0, 217, 255, 0.04) 0%, transparent 50%);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

        button {
            cursor: pointer;
        }

        :focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all var(--transition-base);
            line-height: 1.4;
            margin: 0;
            text-align: center;
        }

        .btn i {
            font-size: 14px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 4px 20px rgba(46, 124, 246, 0.35);
            border: none;
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #3b8aff, #1ee2ff);
            box-shadow: 0 6px 28px rgba(46, 124, 246, 0.55);
            transform: translateY(-1px);
            color: #fff;
        }

        .btn-primary:active {
            transform: scale(0.98);
            box-shadow: 0 2px 12px rgba(46, 124, 246, 0.3);
        }

        .btn-outline {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
        }

        .btn-outline:hover {
            border-color: rgba(255, 255, 255, 0.45);
            background: rgba(255, 255, 255, 0.03);
            color: #fff;
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
            border-radius: 8px;
        }

        .btn-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 14px 34px;
            font-size: 15px;
            border-radius: var(--radius-sm);
            box-shadow: 0 0 28px rgba(46, 124, 246, 0.5);
            border: none;
        }

        .btn-cta:hover {
            transform: scale(1.02);
            box-shadow: 0 0 36px rgba(46, 124, 246, 0.7);
            color: #fff;
        }

        .btn-cta:active {
            transform: scale(0.98);
        }

        /* ========== 导航 ========== */
        .site-header {
            position: relative;
            z-index: 100;
            background: rgba(7, 12, 24, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .header-brand-row {
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            min-height: 64px;
            display: flex;
            align-items: center;
        }

        .header-brand-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 24px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 15px;
            box-shadow: 0 0 16px rgba(46, 124, 246, 0.4);
        }

        .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            line-height: 1.3;
            display: flex;
            flex-direction: column;
        }

        .logo-text small {
            font-size: 11px;
            font-weight: 400;
            color: var(--text-muted);
            letter-spacing: 0.06em;
            line-height: 1.2;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            padding: 8px 14px;
            gap: 8px;
            width: 200px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .header-search i {
            color: var(--text-muted);
            font-size: 13px;
        }

        .header-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-primary);
            font-size: 13px;
            width: 100%;
        }

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

        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 124, 246, 0.15);
        }

        .header-nav-row {
            min-height: 48px;
            display: flex;
            align-items: center;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px 8px 0 0;
            position: relative;
            transition: color var(--transition-fast), background var(--transition-fast);
        }

        .nav-link::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 2px;
            transition: width var(--transition-base);
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(46, 124, 246, 0.08);
        }

        .nav-link.active {
            color: #fff;
            background: rgba(46, 124, 246, 0.12);
        }

        .nav-link.active::after {
            width: 70%;
        }

        .nav-toggle {
            display: none;
            width: 38px;
            height: 38px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-primary);
            font-size: 16px;
        }

        /* ========== 页面 Hero 区 ========== */
        .page-hero {
            position: relative;
            padding: 70px 0 60px;
            background-size: cover;
            background-position: center;
            background-color: rgba(7, 12, 24, 0.75);
            background-blend-mode: overlay;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .page-hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(7, 12, 24, 0.7) 0%, rgba(7, 12, 24, 0.3) 40%, rgba(7, 12, 24, 0.8) 100%);
            z-index: 1;
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }

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

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

        .breadcrumb i {
            font-size: 12px;
            color: var(--text-muted);
        }

        .breadcrumb span {
            color: var(--text-secondary);
        }

        .page-hero h1 {
            font-size: clamp(30px, 4.5vw, 48px);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .page-hero h1 .grad-text {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            line-height: 1.7;
        }

        /* ========== 板块通用 ========== */
        section {
            padding: 70px 0;
        }

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

        .section-head h2 {
            font-size: clamp(24px, 3vw, 30px);
            font-weight: 700;
            line-height: 1.4;
            position: relative;
            padding-left: 16px;
            margin-top: 0;
            margin-bottom: 10px;
        }

        .section-head h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 10px;
            width: 4px;
            height: 22px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--primary), var(--secondary));
        }

        .section-head p {
            font-size: 14px;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.7;
        }

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

        .section-head.center h2 {
            display: inline-block;
            padding-left: 0;
        }

        .section-head.center h2::before {
            display: none;
        }

        .section-head.center h2::after {
            content: "";
            display: block;
            width: 48px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 3px;
            margin: 14px auto 0;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: var(--radius-badge);
            font-size: 12px;
            font-weight: 600;
            background: rgba(122, 92, 255, 0.12);
            border: 1px solid rgba(122, 92, 255, 0.25);
            color: #b8a6ff;
            letter-spacing: 0.02em;
        }

        .badge-blue {
            background: rgba(46, 124, 246, 0.12);
            border-color: rgba(46, 124, 246, 0.3);
            color: #9cc2ff;
        }

        .badge-cyan {
            background: rgba(0, 217, 255, 0.10);
            border-color: rgba(0, 217, 255, 0.25);
            color: #7fefff;
        }

        /* ========== 简介区 ========== */
        .intro-section {
            background: var(--bg-secondary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .intro-content {
            padding-right: 24px;
        }

        .intro-content h2 {
            font-size: clamp(24px, 3vw, 30px);
            font-weight: 700;
            margin: 16px 0 14px;
            line-height: 1.4;
            color: var(--text-primary);
        }

        .intro-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .intro-cover {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--glass-border);
        }

        .intro-cover::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(7, 12, 24, 0) 60%, rgba(7, 12, 24, 0.5) 100%);
        }

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

        /* ========== 目录分栏区 ========== */
        .guide-section-block {
            background: var(--bg-primary);
        }

        .guide-layout {
            align-items: flex-start;
            gap: 0;
            margin: 0;
        }

        .guide-sidebar {
            position: sticky;
            top: 130px;
            z-index: 10;
        }

        .guide-toc {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 20px;
            box-shadow: var(--shadow-card), var(--glass-highlight);
            max-width: 280px;
        }

        .guide-toc h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            padding-bottom: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .guide-toc h3 i {
            color: var(--secondary);
            font-size: 14px;
        }

        .guide-toc ul li {
            margin-bottom: 4px;
        }

        .guide-toc ul li a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 9px 12px;
            border-radius: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            line-height: 1.4;
        }

        .guide-toc ul li a i {
            font-size: 12px;
            color: var(--text-muted);
            transition: color var(--transition-fast), transform var(--transition-fast);
        }

        .guide-toc ul li a:hover {
            color: var(--primary);
            background: rgba(46, 124, 246, 0.08);
        }

        .guide-toc ul li a:hover i {
            color: var(--primary);
            transform: translateX(3px);
        }

        .guide-toc ul li a.active {
            color: var(--primary);
            background: rgba(46, 124, 246, 0.12);
        }

        .guide-content {
            padding-left: 0;
        }

        .guide-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 30px;
            box-shadow: var(--shadow-card), var(--glass-highlight);
            margin-bottom: 20px;
            transition: border-color var(--transition-fast), transform var(--transition-fast);
            position: relative;
            scroll-margin-top: 140px;
        }

        .guide-item:hover {
            border-color: rgba(255, 255, 255, 0.14);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35), var(--glass-highlight);
        }

        .guide-item-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 14px;
            box-shadow: 0 4px 12px rgba(46, 124, 246, 0.3);
        }

        .guide-item h2 {
            font-size: clamp(18px, 2.2vw, 22px);
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.4;
            color: var(--text-primary);
        }

        .guide-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 10px;
        }

        .guide-item .guide-tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 16px;
        }

        .guide-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            font-size: 12px;
            background: rgba(0, 217, 255, 0.08);
            border: 1px solid rgba(0, 217, 255, 0.18);
            color: #7fefff;
        }

        /* ========== FAQ 区 ========== */
        .faq-section {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: var(--glass-highlight);
        }

        .faq-item.open {
            border-color: rgba(46, 124, 246, 0.3);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25), var(--glass-highlight);
        }

        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            gap: 16px;
            user-select: none;
            min-height: 56px;
        }

        .faq-q-text {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-primary);
            line-height: 1.5;
            transition: color var(--transition-fast);
        }

        .faq-q-text .faq-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            border-radius: 6px;
            background: rgba(46, 124, 246, 0.12);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .faq-icon {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--text-secondary);
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--secondary);
            border-color: var(--secondary);
            background: rgba(0, 217, 255, 0.1);
        }

        .faq-a {
            display: none;
            padding: 0 20px 20px 56px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        .faq-a p {
            margin-bottom: 8px;
        }

        /* ========== CTA 区 ========== */
        .cta-section {
            position: relative;
            padding: 80px 0;
            background-size: cover;
            background-position: center;
            background-color: rgba(7, 12, 24, 0.55);
            background-blend-mode: overlay;
            text-align: center;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(46, 124, 246, 0.25) 0%, rgba(7, 12, 24, 0.65) 60%, rgba(7, 12, 24, 0.9) 100%);
            z-index: 1;
        }

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

        .cta-section h2 {
            font-size: clamp(24px, 3vw, 30px);
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .cta-section p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }

        .cta-section .btn-cta {
            margin: 0 auto;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 56px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.6fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

        .footer-brand .logo-text {
            font-size: 16px;
        }

        .footer-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h3 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-col h3::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-muted);
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul li a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }

        .footer-compliance p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 8px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding: 18px 0;
        }

        .footer-bottom p {
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
            margin: 0;
        }

        /* ========== 移动端适配 ========== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .guide-sidebar {
                position: static;
                top: auto;
                margin-bottom: 20px;
            }

            .guide-toc {
                max-width: 100%;
            }
        }

        @media (max-width: 768px) {
            .header-brand-inner {
                flex-wrap: wrap;
                padding: 12px 0;
                gap: 10px;
            }

            .header-actions {
                gap: 10px;
            }

            .header-search {
                display: none;
            }

            .header-nav-row {
                display: none;
                border-top: 1px solid rgba(255, 255, 255, 0.05);
            }

            .header-nav-row.open {
                display: block;
            }

            .main-nav {
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0;
            }

            .nav-link {
                border-radius: 8px;
                padding: 12px 16px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.03);
            }

            .nav-link::after {
                display: none;
            }

            .nav-link.active {
                background: rgba(46, 124, 246, 0.12);
                border-left: 3px solid var(--primary);
            }

            .nav-toggle {
                display: flex;
            }

            .page-hero {
                padding: 48px 0 40px;
            }

            section {
                padding: 48px 0;
            }

            .intro-content {
                padding-right: 0;
                margin-bottom: 24px;
            }

            .guide-item {
                padding: 22px 18px;
            }

            .cta-section {
                padding: 56px 0;
            }

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

            .footer-desc {
                max-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .logo-text {
                font-size: 16px;
            }

            .btn {
                padding: 10px 20px;
                font-size: 13px;
            }

            .faq-q {
                padding: 14px 16px;
            }

            .faq-a {
                padding-left: 40px;
            }

            .guide-toc {
                padding: 16px;
            }

            .footer-bottom p {
                font-size: 11px;
                line-height: 1.6;
            }
        }

        /* ========== 动效 ========== */
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.4s ease, transform 0.4s ease;
        }

        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation: none !important;
                transition: none !important;
            }

            html {
                scroll-behavior: auto;
            }
        }