/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0A192F;
            --color-primary-light: #112240;
            --color-accent: #00D4FF;
            --color-accent-hover: #66E5FF;
            --color-purple: #7B2FFF;
            --color-purple-hover: #9B5FFF;
            --color-bg: #0A0F1E;
            --color-bg-card: rgba(255,255,255,0.05);
            --color-bg-card-hover: rgba(255,255,255,0.08);
            --color-border: rgba(255,255,255,0.12);
            --color-border-light: rgba(255,255,255,0.06);
            --color-text: #E0E6ED;
            --color-text-secondary: #8B949E;
            --color-text-heading: #FFFFFF;
            --color-gold: #FFD700;
            --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 8px 32px rgba(0,0,0,0.3);
            --shadow-glow: 0 0 20px rgba(0,212,255,0.4), 0 0 40px rgba(123,47,255,0.2);
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --nav-height: 70px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a { color: var(--color-accent); text-decoration: none; transition: color var(--transition-base); }
        a:hover { color: var(--color-accent-hover); }
        a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--color-text-heading); font-weight: 600; line-height: 1.25; }
        p { margin-bottom: 1rem; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
        @media (max-width: 639px) { .container { padding: 0 15px; } }

        /* ===== 背景纹理 ===== */
        body::before {
            content: '';
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            background-image:
                radial-gradient(ellipse at 20% 50%, rgba(0,212,255,0.03) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(123,47,255,0.03) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(0,212,255,0.02) 0%, transparent 50%);
            pointer-events: none;
            z-index: -1;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0; left: 0; width: 100%;
            height: var(--nav-height);
            background: rgba(8,12,20,0.92);
            backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--color-border-light);
            z-index: 1000;
            transition: background var(--transition-base);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: 1px;
        }
        .logo i { color: var(--color-accent); font-size: 1.6rem; }
        .logo span { background: linear-gradient(135deg, var(--color-accent), var(--color-purple)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { opacity: 0.9; }

        .nav-channels {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-channels a {
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
            position: relative;
        }
        .nav-channels a::after {
            content: '';
            position: absolute;
            bottom: 2px; left: 50%;
            width: 0; height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            transform: translateX(-50%);
            transition: width var(--transition-base);
        }
        .nav-channels a:hover { color: var(--color-text-heading); background: rgba(255,255,255,0.04); }
        .nav-channels a:hover::after { width: 60%; }
        .nav-channels a.active { color: var(--color-accent); background: rgba(0,212,255,0.08); }
        .nav-channels a.active::after { width: 70%; }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255,255,255,0.08);
            border-radius: var(--radius-xl);
            padding: 0 16px;
            transition: background var(--transition-base);
        }
        .nav-search:focus-within { background: rgba(255,255,255,0.14); }
        .nav-search input {
            background: transparent;
            border: none;
            padding: 8px 8px 8px 0;
            color: var(--color-text-heading);
            font-size: 0.9rem;
            width: 140px;
        }
        .nav-search input::placeholder { color: var(--color-text-secondary); }
        .nav-search button {
            background: transparent;
            border: none;
            color: var(--color-text-secondary);
            cursor: pointer;
            padding: 6px;
            transition: color var(--transition-base);
        }
        .nav-search button:hover { color: var(--color-accent); }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-accent);
            background: transparent;
            border: 1px solid var(--color-accent);
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-base);
        }
        .btn-outline:hover { background: rgba(0,212,255,0.1); color: var(--color-accent-hover); border-color: var(--color-accent-hover); }
        .btn-outline:active { transform: scale(0.97); }

        .btn-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--color-accent), var(--color-purple));
            border: none;
            border-radius: var(--radius-md);
            cursor: pointer;
            box-shadow: 0 0 20px rgba(0,212,255,0.3), 0 0 40px rgba(123,47,255,0.15);
            transition: all var(--transition-base);
        }
        .btn-glow:hover { box-shadow: 0 0 30px rgba(0,212,255,0.5), 0 0 60px rgba(123,47,255,0.3); transform: translateY(-2px); color: #fff; }
        .btn-glow:active { transform: scale(0.95); box-shadow: 0 0 10px rgba(0,212,255,0.3); }

        .hamburger {
            display: none;
            background: transparent;
            border: none;
            color: var(--color-text-heading);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px;
            transition: color var(--transition-base);
        }
        .hamburger:hover { color: var(--color-accent); }

        /* 移动端导航抽屉 */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--nav-height); left: 0; width: 100%;
            height: calc(100vh - var(--nav-height));
            background: rgba(8,12,20,0.98);
            backdrop-filter: blur(20px);
            z-index: 999;
            padding: 30px 20px;
            overflow-y: auto;
        }
        .mobile-nav-overlay.open { display: block; }
        .mobile-nav-overlay a {
            display: block;
            padding: 16px 0;
            font-size: 1.15rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            border-bottom: 1px solid var(--color-border-light);
            transition: color var(--transition-base);
        }
        .mobile-nav-overlay a:hover { color: var(--color-accent); }
        .mobile-nav-overlay a.active { color: var(--color-accent); }
        .mobile-nav-overlay .btn-glow { margin-top: 24px; width: 100%; justify-content: center; }

        /* ===== Hero ===== */
        .hero {
            min-height: 90vh;
            display: flex;
            align-items: center;
            position: relative;
            padding: 120px 0 80px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10,15,30,0.88) 0%, rgba(10,15,30,0.70) 50%, rgba(10,15,30,0.60) 100%);
            z-index: 1;
        }
        .hero .container { position: relative; z-index: 2; }
        .hero-content {
            max-width: 720px;
            padding: 40px 48px;
            background: rgba(255,255,255,0.04);
            backdrop-filter: blur(16px) saturate(180%);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius-lg);
            box-shadow: 0 16px 48px rgba(0,0,0,0.4);
        }
        .hero h1 {
            font-size: 2.6rem;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff 30%, var(--color-accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero .subtitle {
            font-size: 1.15rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 580px;
        }
        .hero .subtitle strong { color: var(--color-accent); font-weight: 500; }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-actions .btn-glow { padding: 16px 44px; font-size: 1.1rem; border-radius: var(--radius-lg); }

        /* ===== 通用板块 ===== */
        .section { padding: 80px 0; }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .section-title p {
            color: var(--color-text-secondary);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }
        @media (max-width: 639px) {
            .section { padding: 50px 0; }
            .section-title h2 { font-size: 1.6rem; }
        }

        /* ===== 渠道卡片 ===== */
        .channel-card {
            background: var(--color-bg-card);
            backdrop-filter: blur(12px) saturate(180%);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px 24px 28px;
            text-align: center;
            transition: all var(--transition-base);
            height: 100%;
        }
        .channel-card:hover {
            background: var(--color-bg-card-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow-card);
            border-color: rgba(0,212,255,0.25);
        }
        .channel-card .icon {
            font-size: 2.6rem;
            color: var(--color-accent);
            margin-bottom: 18px;
            display: inline-block;
            background: rgba(0,212,255,0.08);
            padding: 16px;
            border-radius: 50%;
            line-height: 1;
        }
        .channel-card h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 10px; }
        .channel-card p { font-size: 0.95rem; color: var(--color-text-secondary); margin-bottom: 16px; line-height: 1.6; }
        .channel-card a { font-weight: 500; font-size: 0.95rem; }

        /* ===== 步骤区 ===== */
        .steps-grid { position: relative; }
        .step-card {
            background: var(--color-bg-card);
            backdrop-filter: blur(12px) saturate(180%);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: 32px 24px 28px;
            text-align: center;
            transition: all var(--transition-base);
            height: 100%;
            position: relative;
        }
        .step-card:hover {
            background: var(--color-bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .step-number {
            width: 52px; height: 52px;
            line-height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-accent), var(--color-purple));
            color: #fff;
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 auto 18px;
            box-shadow: 0 0 20px rgba(0,212,255,0.25);
        }
        .step-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 10px; }
        .step-card p { font-size: 0.92rem; color: var(--color-text-secondary); line-height: 1.6; margin-bottom: 0; }
        .step-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--color-accent);
            opacity: 0.5;
            padding: 0 8px;
        }
        @media (max-width: 639px) {
            .step-arrow { transform: rotate(90deg); padding: 8px 0; }
        }

        /* ===== 案例卡片 ===== */
        .testimonial-card {
            background: var(--color-bg-card);
            backdrop-filter: blur(12px) saturate(180%);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: all var(--transition-base);
            height: 100%;
        }
        .testimonial-card:hover {
            background: var(--color-bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: rgba(0,212,255,0.2);
        }
        .testimonial-card .user { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
        .testimonial-card .avatar {
            width: 48px; height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-accent), var(--color-purple));
            display: flex; align-items: center; justify-content: center;
            color: #fff; font-weight: 700; font-size: 1.1rem;
            flex-shrink: 0;
        }
        .testimonial-card .user-info .name { font-weight: 600; color: var(--color-text-heading); font-size: 1rem; }
        .testimonial-card .user-info .date { font-size: 0.82rem; color: var(--color-text-secondary); }
        .testimonial-card .stars { color: var(--color-gold); font-size: 0.95rem; letter-spacing: 2px; margin-bottom: 10px; }
        .testimonial-card .quote { font-size: 0.95rem; color: var(--color-text-secondary); line-height: 1.7; font-style: italic; margin-bottom: 0; }

        /* ===== 资讯卡片（CMS） ===== */
        .news-card {
            background: var(--color-bg-card);
            backdrop-filter: blur(12px) saturate(180%);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 24px 22px;
            transition: all var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            background: var(--color-bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: rgba(0,212,255,0.2);
        }
        .news-card .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
            flex-wrap: wrap;
        }
        .news-card .tag {
            display: inline-block;
            padding: 2px 12px;
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--color-accent);
            background: rgba(0,212,255,0.1);
            border-radius: 20px;
            border: 1px solid rgba(0,212,255,0.15);
        }
        .news-card .tag:hover { background: rgba(0,212,255,0.18); }
        .news-card .date { font-size: 0.82rem; color: var(--color-text-secondary); }
        .news-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 10px; line-height: 1.4; }
        .news-card h3 a { color: var(--color-text-heading); transition: color var(--transition-base); }
        .news-card h3 a:hover { color: var(--color-accent); }
        .news-card .excerpt {
            font-size: 0.92rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }
        .news-card .read-more {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-accent);
            align-self: flex-start;
            transition: gap var(--transition-base);
            display: inline-flex; align-items: center; gap: 4px;
        }
        .news-card .read-more:hover { gap: 8px; }

        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--color-text-secondary);
            font-size: 1rem;
        }
        .empty-state i { font-size: 2.4rem; margin-bottom: 16px; display: block; opacity: 0.4; }

        /* ===== FAQ ===== */
        .faq-section { background: rgba(255,255,255,0.02); }
        .accordion-item {
            background: var(--color-bg-card);
            backdrop-filter: blur(8px) saturate(160%);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            transition: background var(--transition-base);
        }
        .accordion-item:hover { background: var(--color-bg-card-hover); }
        .accordion-title {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 500;
            font-size: 1.05rem;
            color: var(--color-text-heading);
            user-select: none;
            transition: color var(--transition-base);
        }
        .accordion-title:hover { color: var(--color-accent); }
        .accordion-title .arrow {
            font-size: 1.2rem;
            color: var(--color-text-secondary);
            transition: transform var(--transition-base);
        }
        .accordion-item.is-active .accordion-title .arrow { transform: rotate(180deg); color: var(--color-accent); }
        .accordion-content {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            display: none;
        }
        .accordion-item.is-active .accordion-content { display: block; }
        .accordion-content p:last-child { margin-bottom: 0; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0,212,255,0.04), rgba(123,47,255,0.04));
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
        }
        .cta-box {
            text-align: center;
            padding: 40px 20px;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-box h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 14px; }
        .cta-box p { font-size: 1.1rem; color: var(--color-text-secondary); margin-bottom: 32px; }
        .cta-box .btn-glow { padding: 18px 48px; font-size: 1.15rem; border-radius: var(--radius-lg); }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #05080F;
            padding: 48px 0 32px;
            border-top: 1px solid var(--color-border-light);
        }
        .site-footer .grid-x { gap: 30px; }
        .site-footer .footer-brand .logo { font-size: 1.25rem; margin-bottom: 12px; }
        .site-footer .footer-brand p { font-size: 0.9rem; color: var(--color-text-secondary); line-height: 1.6; max-width: 300px; }
        .site-footer .footer-links h4 { font-size: 1rem; font-weight: 600; color: var(--color-text-heading); margin-bottom: 16px; }
        .site-footer .footer-links a {
            display: block;
            padding: 6px 0;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            transition: color var(--transition-base);
        }
        .site-footer .footer-links a:hover { color: var(--color-accent); }
        .site-footer .footer-social h4 { font-size: 1rem; font-weight: 600; color: var(--color-text-heading); margin-bottom: 16px; }
        .site-footer .social-icons { display: flex; gap: 14px; flex-wrap: wrap; }
        .site-footer .social-icons a {
            display: flex; align-items: center; justify-content: center;
            width: 40px; height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            border: 1px solid var(--color-border-light);
            color: var(--color-text-secondary);
            font-size: 1.1rem;
            transition: all var(--transition-base);
        }
        .site-footer .social-icons a:hover { background: rgba(0,212,255,0.12); color: var(--color-accent); border-color: var(--color-accent); box-shadow: 0 0 16px rgba(0,212,255,0.15); }
        .footer-bottom {
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid var(--color-border-light);
            text-align: center;
            font-size: 0.85rem;
            color: var(--color-text-secondary);
        }
        .footer-bottom a { color: var(--color-text-secondary); }
        .footer-bottom a:hover { color: var(--color-accent); }

        /* ===== 响应式 ===== */
        @media (max-width: 1023px) {
            .nav-channels { display: none; }
            .nav-search { display: none; }
            .nav-actions .btn-outline { display: none; }
            .hamburger { display: block; }
            .hero h1 { font-size: 2rem; }
            .hero-content { padding: 32px 28px; }
            .step-arrow { font-size: 1.4rem; }
        }
        @media (max-width: 639px) {
            .hero { min-height: 70vh; padding: 100px 0 50px; }
            .hero h1 { font-size: 1.6rem; }
            .hero .subtitle { font-size: 1rem; }
            .hero-content { padding: 24px 18px; }
            .hero-actions .btn-glow { padding: 14px 32px; font-size: 1rem; width: 100%; }
            .channel-card { padding: 24px 16px; }
            .step-card { padding: 24px 16px; }
            .testimonial-card { padding: 20px 16px; }
            .news-card { padding: 20px 16px; }
            .accordion-title { padding: 14px 16px; font-size: 0.95rem; }
            .accordion-content { padding: 0 16px 14px; }
            .cta-box h2 { font-size: 1.5rem; }
            .cta-box .btn-glow { padding: 14px 32px; font-size: 1rem; width: 100%; }
            .site-footer { padding: 32px 0 24px; }
            .site-footer .grid-x { gap: 20px; }
        }
        @media (min-width: 1024px) {
            .mobile-nav-overlay { display: none !important; }
        }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mb-0 { margin-bottom: 0; }
        .mt-1 { margin-top: 8px; }
        .mt-2 { margin-top: 16px; }
        .gap-1 { gap: 8px; }
        .gap-2 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .relative { position: relative; }
        .glass {
            background: var(--color-bg-card);
            backdrop-filter: blur(12px) saturate(180%);
            border: 1px solid var(--color-border);
        }

/* roulang page: article */
:root {
            --primary: #0A192F;
            --primary-light: #112240;
            --accent: #00D4FF;
            --accent-hover: #66E5FF;
            --accent-dim: rgba(0, 212, 255, 0.15);
            --purple: #7B2FFF;
            --purple-hover: #9A5FFF;
            --bg: #0A0F1E;
            --bg-card: rgba(255, 255, 255, 0.05);
            --bg-card-hover: rgba(255, 255, 255, 0.08);
            --border: rgba(255, 255, 255, 0.1);
            --border-light: rgba(255, 255, 255, 0.06);
            --text: #E0E6ED;
            --text-heading: #FFFFFF;
            --text-muted: #8B949E;
            --text-link: #00D4FF;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.4), 0 0 40px rgba(123, 47, 255, 0.2);
            --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --header-h: 70px;
            --max-width: 1200px;
            --content-max: 800px;
            --gutter: 30px;
        }

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

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a { color: var(--text-link); text-decoration: none; transition: color 0.25s ease; }
        a:hover { color: var(--accent-hover); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        figure { margin: 28px 0; }
        figcaption { font-size: 14px; color: var(--text-muted); text-align: center; margin-top: 10px; line-height: 1.5; }

        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(8, 12, 20, 0.92);
            backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: background 0.3s ease;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-heading);
            text-decoration: none;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .logo i { color: var(--accent); font-size: 26px; }
        .logo span { background: linear-gradient(135deg, #fff, var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { color: var(--text-heading); }
        .logo:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 4px; }

        .nav-channels {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0 16px;
        }
        .nav-channels a {
            position: relative;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-channels a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: transform 0.3s ease;
        }
        .nav-channels a:hover { color: var(--text-heading); background: rgba(255,255,255,0.04); }
        .nav-channels a:hover::after { transform: translateX(-50%) scaleX(1); }
        .nav-channels a.active { color: var(--accent); font-weight: 600; background: rgba(0,212,255,0.06); }
        .nav-channels a.active::after { transform: translateX(-50%) scaleX(1); background: var(--accent); box-shadow: 0 0 8px var(--accent); }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255,255,255,0.08);
            border-radius: var(--radius-xl);
            padding: 0 4px 0 16px;
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .nav-search:focus-within { background: rgba(255,255,255,0.12); box-shadow: 0 0 0 2px var(--accent-dim); }
        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-heading);
            font-size: 14px;
            padding: 8px 10px 8px 0;
            min-width: 140px;
            font-family: var(--font-stack);
        }
        .nav-search input::placeholder { color: var(--text-muted); }
        .nav-search button {
            background: transparent;
            border: none;
            color: var(--text-muted);
            padding: 8px 12px;
            cursor: pointer;
            border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
            transition: color 0.25s ease;
        }
        .nav-search button:hover { color: var(--accent); }
        .nav-search button:focus-visible { outline: 2px solid var(--accent); }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border: 1px solid var(--accent);
            border-radius: var(--radius-sm);
            color: var(--text-heading);
            font-size: 14px;
            font-weight: 500;
            background: transparent;
            transition: all 0.3s ease;
            text-decoration: none;
            cursor: pointer;
            font-family: var(--font-stack);
        }
        .btn-outline:hover { background: var(--accent-dim); color: var(--accent); border-color: var(--accent); }
        .btn-outline:active { transform: scale(0.97); }

        .btn-glow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 26px;
            background: linear-gradient(135deg, #00D4FF, #7B2FFF);
            border: none;
            border-radius: var(--radius-md);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            box-shadow: 0 0 20px rgba(0,212,255,0.3), 0 0 40px rgba(123,47,255,0.15);
            transition: all 0.3s ease;
            text-decoration: none;
            cursor: pointer;
            font-family: var(--font-stack);
            white-space: nowrap;
        }
        .btn-glow:hover { box-shadow: 0 0 30px rgba(0,212,255,0.5), 0 0 60px rgba(123,47,255,0.3); transform: translateY(-1px); color: #fff; }
        .btn-glow:active { transform: scale(0.95); box-shadow: 0 0 10px rgba(0,212,255,0.3); }
        .btn-glow:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }

        .hamburger {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-heading);
            font-size: 22px;
            padding: 8px;
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: background 0.25s ease;
        }
        .hamburger:hover { background: rgba(255,255,255,0.06); }
        .hamburger:focus-visible { outline: 2px solid var(--accent); }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            width: 100%;
            height: calc(100vh - var(--header-h));
            background: rgba(8, 12, 20, 0.97);
            backdrop-filter: blur(20px);
            flex-direction: column;
            align-items: center;
            justify-content: flex-start;
            padding: 40px 20px;
            gap: 12px;
            z-index: 999;
            overflow-y: auto;
        }
        .mobile-nav-overlay.open { display: flex; }
        .mobile-nav-overlay a {
            font-size: 20px;
            color: var(--text);
            padding: 14px 24px;
            width: 100%;
            max-width: 320px;
            text-align: center;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            text-decoration: none;
        }
        .mobile-nav-overlay a:hover { background: rgba(255,255,255,0.06); color: var(--accent); }
        .mobile-nav-overlay a.active { color: var(--accent); font-weight: 600; background: rgba(0,212,255,0.06); }

        /* ========== ARTICLE HEADER ========== */
        .article-header {
            position: relative;
            margin-top: var(--header-h);
            padding: 80px 0 60px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            min-height: 340px;
            display: flex;
            align-items: flex-end;
        }
        .article-header::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10,15,30,0.85) 0%, rgba(10,15,30,0.92) 100%);
            z-index: 0;
        }
        .article-header .container { position: relative; z-index: 1; width: 100%; }

        .breadcrumb {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb a { color: var(--text-muted); text-decoration: none; transition: color 0.25s ease; }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb .sep { color: rgba(255,255,255,0.25); margin: 0 4px; }
        .breadcrumb .current { color: var(--text-heading); font-weight: 500; }

        .article-header h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.25;
            margin-bottom: 16px;
            max-width: 900px;
            letter-spacing: 0.3px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .article-meta .category {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            background: var(--accent-dim);
            border: 1px solid rgba(0,212,255,0.2);
            border-radius: var(--radius-xl);
            color: var(--accent);
            font-weight: 500;
            font-size: 13px;
        }
        .article-meta .date { display: flex; align-items: center; gap: 6px; }
        .article-meta .date i { font-size: 14px; }

        /* ========== ARTICLE BODY ========== */
        .article-body-section {
            padding: 60px 0 80px;
            background: var(--bg);
        }
        .article-body-section .container {
            max-width: var(--content-max);
            margin: 0 auto;
        }
        .article-content {
            background: rgba(255,255,255,0.04);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px 48px;
            backdrop-filter: blur(8px);
            line-height: 1.8;
            font-size: 16px;
            color: var(--text);
        }
        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-heading);
            margin: 40px 0 16px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--border-light);
        }
        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-heading);
            margin: 32px 0 12px;
        }
        .article-content p { margin-bottom: 20px; word-break: break-word; }
        .article-content p:last-child { margin-bottom: 0; }
        .article-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
        .article-content a:hover { color: var(--accent-hover); }
        .article-content ul, .article-content ol { margin: 16px 0 20px 24px; }
        .article-content li { margin-bottom: 8px; }
        .article-content blockquote {
            margin: 24px 0;
            padding: 16px 24px;
            border-left: 4px solid var(--accent);
            background: rgba(0,212,255,0.04);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-muted);
        }
        .article-content pre, .article-content code {
            font-family: 'SF Mono', 'Fira Code', monospace;
            background: rgba(255,255,255,0.06);
            border-radius: var(--radius-sm);
        }
        .article-content code { padding: 2px 8px; font-size: 14px; }
        .article-content pre { padding: 20px; overflow-x: auto; border: 1px solid var(--border); margin: 20px 0; }
        .article-content pre code { background: transparent; padding: 0; font-size: 14px; }
        .article-content img { border-radius: var(--radius-md); margin: 24px 0; }

        .article-not-found {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
        }
        .article-not-found i { font-size: 48px; margin-bottom: 16px; opacity: 0.5; }
        .article-not-found h3 { font-size: 22px; color: var(--text-heading); margin-bottom: 12px; }
        .article-not-found a { margin-top: 16px; display: inline-block; }

        /* ========== RELATED ARTICLES ========== */
        .related-section {
            padding: 20px 0 80px;
            background: var(--bg);
        }
        .related-section .container { max-width: var(--max-width); }
        .related-section .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 32px;
            text-align: center;
            letter-spacing: 0.5px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            backdrop-filter: blur(12px) saturate(180%);
            transition: all 0.35s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-card); border-color: rgba(0,212,255,0.2); }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
            transition: transform 0.5s ease;
        }
        .related-card:hover .card-img { transform: scale(1.03); }
        .related-card .card-body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
        .related-card .card-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .card-body h3 a { color: var(--text-heading); text-decoration: none; }
        .related-card .card-body h3 a:hover { color: var(--accent); }
        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 12px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .tag {
            display: inline-block;
            padding: 3px 12px;
            background: var(--accent-dim);
            border-radius: var(--radius-xl);
            font-size: 12px;
            color: var(--accent);
            font-weight: 500;
            align-self: flex-start;
        }

        .back-home-wrap { text-align: center; margin-top: 40px; }
        .back-home-wrap a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-size: 15px;
            transition: color 0.25s ease;
        }
        .back-home-wrap a:hover { color: var(--accent); }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #05080F;
            padding: 50px 0 30px;
            border-top: 1px solid rgba(255,255,255,0.04);
        }
        .site-footer .container { max-width: var(--max-width); }
        .footer-brand .logo { margin-bottom: 14px; font-size: 20px; }
        .footer-brand p { font-size: 14px; color: var(--text-muted); line-height: 1.7; max-width: 320px; }
        .footer-links h4, .footer-social h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 16px;
        }
        .footer-links a {
            display: block;
            padding: 5px 0;
            font-size: 14px;
            color: var(--text-muted);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        .footer-links a:hover { color: var(--accent); }
        .social-icons { display: flex; gap: 16px; flex-wrap: wrap; }
        .social-icons a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: var(--text-muted);
            font-size: 20px;
            transition: all 0.3s ease;
            text-decoration: none;
        }
        .social-icons a:hover { background: var(--accent-dim); color: var(--accent); transform: translateY(-2px); box-shadow: 0 0 16px rgba(0,212,255,0.2); }
        .social-icons a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
        .footer-bottom {
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.05);
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-muted); text-decoration: none; }
        .footer-bottom a:hover { color: var(--accent); }

        /* ========== RESPONSIVE ========== */
        @media screen and (max-width: 1023px) {
            .nav-channels { display: none; }
            .nav-search input { min-width: 100px; }
            .hamburger { display: block; }
            .btn-outline span, .btn-glow span { display: none; }
            .btn-outline i, .btn-glow i { margin: 0; }
            .article-header h1 { font-size: 30px; }
            .article-content { padding: 30px 28px; }
        }

        @media screen and (max-width: 767px) {
            .article-header { padding: 60px 0 40px; min-height: 260px; }
            .article-header h1 { font-size: 24px; }
            .article-content { padding: 24px 18px; font-size: 15px; }
            .article-content h2 { font-size: 22px; }
            .article-content h3 { font-size: 18px; }
            .related-card .card-img { height: 150px; }
            .related-section .section-title { font-size: 22px; }
            .footer-brand p { max-width: 100%; }
            .site-footer .grid-x > .cell { margin-bottom: 24px; }
        }

        @media screen and (max-width: 520px) {
            .nav-search { display: none; }
            .article-header h1 { font-size: 20px; }
            .article-meta { flex-direction: column; align-items: flex-start; gap: 10px; }
            .article-content { padding: 18px 14px; font-size: 14px; border-radius: var(--radius-md); }
            .related-card .card-body { padding: 16px; }
            .container { padding: 0 14px; }
        }

        @media screen and (min-width: 640px) and (max-width: 1023px) {
            .related-card .card-img { height: 160px; }
        }

        @media screen and (min-width: 1024px) {
            .nav-channels { display: flex; }
            .hamburger { display: none; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0A192F;
            --primary-light: #112240;
            --accent: #00D4FF;
            --accent-hover: #66E5FF;
            --accent-dim: rgba(0, 212, 255, 0.15);
            --purple: #7B2FFF;
            --purple-glow: rgba(123, 47, 255, 0.3);
            --bg-dark: #0A0F1E;
            --bg-card: rgba(255, 255, 255, 0.05);
            --bg-card-hover: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.10);
            --border-glow: rgba(0, 212, 255, 0.25);
            --text-primary: #E0E6ED;
            --text-heading: #FFFFFF;
            --text-muted: #8B949E;
            --text-link: #00D4FF;
            --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-glow-btn: 12px;
            --radius-input: 6px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-btn-glow: 0 0 20px rgba(0, 212, 255, 0.4), 0 0 40px rgba(123, 47, 255, 0.2);
            --transition-base: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --container-max: 1200px;
            --spacing-section: 80px;
            --spacing-section-mobile: 50px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg-dark);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

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

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

        button,
        input,
        select,
        textarea {
            font-family: var(--font-stack);
            font-size: 1rem;
            outline: none;
            border: none;
        }

        ::selection {
            background: var(--accent-dim);
            color: var(--text-heading);
        }

        /* ===== Utility ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }
        @media (max-width: 639px) {
            .container {
                padding: 0 15px;
            }
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 600;
            color: var(--text-heading);
            text-align: center;
            margin-bottom: 2.5rem;
            letter-spacing: 0.02em;
        }
        .section-title i {
            color: var(--accent);
            margin-right: 10px;
        }
        @media (max-width: 639px) {
            .section-title {
                font-size: 1.4rem;
                margin-bottom: 1.8rem;
            }
        }

        .text-glow {
            color: var(--accent);
            text-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
        }

        .btn-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent), var(--purple));
            border-radius: var(--radius-glow-btn);
            box-shadow: var(--shadow-btn-glow);
            transition: all var(--transition-base);
            cursor: pointer;
            border: none;
            text-decoration: none;
            letter-spacing: 0.02em;
        }
        .btn-glow:hover {
            box-shadow: 0 0 35px rgba(0, 212, 255, 0.6), 0 0 60px rgba(123, 47, 255, 0.3);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-glow:active {
            transform: scale(0.95);
            box-shadow: 0 0 15px rgba(0, 212, 255, 0.3);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-heading);
            background: transparent;
            border: 1.5px solid var(--accent);
            border-radius: var(--radius-btn);
            transition: all var(--transition-base);
            cursor: pointer;
            text-decoration: none;
        }
        .btn-outline:hover {
            background: var(--accent-dim);
            color: var(--accent-hover);
            border-color: var(--accent-hover);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 12, 20, 0.88);
            backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            height: 70px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            height: 100%;
        }

        .site-header .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-heading);
            font-size: 1.35rem;
            font-weight: 700;
            text-decoration: none;
            letter-spacing: 0.02em;
            flex-shrink: 0;
        }
        .site-header .logo i {
            color: var(--accent);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.3));
        }
        .site-header .logo span {
            background: linear-gradient(135deg, #fff 60%, var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-channels {
            display: flex;
            align-items: center;
            gap: 24px;
            flex: 1;
            justify-content: center;
        }
        .nav-channels a {
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            text-decoration: none;
            padding: 6px 0;
            position: relative;
            transition: color var(--transition-base);
            white-space: nowrap;
        }
        .nav-channels a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 80%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: transform 0.3s ease;
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.3);
        }
        .nav-channels a:hover {
            color: var(--text-heading);
        }
        .nav-channels a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-channels a.active {
            color: var(--text-heading);
            font-weight: 600;
        }
        .nav-channels a.active::after {
            transform: translateX(-50%) scaleX(1);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 20px;
            padding: 0 4px 0 16px;
            transition: background var(--transition-base);
        }
        .nav-search input {
            background: transparent;
            border: none;
            color: var(--text-primary);
            padding: 8px 4px;
            font-size: 0.9rem;
            width: 140px;
            outline: none;
            font-family: var(--font-stack);
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
            opacity: 0.7;
        }
        .nav-search button {
            background: transparent;
            border: none;
            color: var(--text-muted);
            padding: 8px 12px;
            cursor: pointer;
            transition: color var(--transition-base);
            font-size: 0.95rem;
        }
        .nav-search button:hover {
            color: var(--accent);
        }
        .nav-search:focus-within {
            background: rgba(255, 255, 255, 0.13);
        }

        .hamburger {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-heading);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 4px 8px;
            transition: color var(--transition-base);
        }
        .hamburger:hover {
            color: var(--accent);
        }

        /* Mobile Nav Overlay */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background: rgba(8, 12, 20, 0.97);
            backdrop-filter: blur(20px);
            padding: 24px 20px 40px;
            flex-direction: column;
            gap: 16px;
            z-index: 999;
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
        }
        .mobile-nav-overlay.open {
            display: flex;
        }
        .mobile-nav-overlay a {
            color: var(--text-muted);
            font-size: 1.1rem;
            font-weight: 500;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            text-decoration: none;
            transition: color var(--transition-base);
        }
        .mobile-nav-overlay a:hover,
        .mobile-nav-overlay a.active {
            color: var(--text-heading);
        }
        .mobile-nav-overlay a.active {
            color: var(--accent);
        }

        @media (max-width: 1023px) {
            .nav-channels {
                display: none;
            }
            .nav-actions .btn-outline,
            .nav-actions .btn-glow {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .nav-search {
                display: none;
            }
            .nav-actions .hamburger {
                display: block;
            }
        }
        @media (min-width: 1024px) {
            .mobile-nav-overlay {
                display: none !important;
            }
        }

        /* ===== Hero ===== */
        .category-hero {
            margin-top: 70px;
            min-height: 55vh;
            display: flex;
            align-items: center;
            position: relative;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 15, 30, 0.88) 40%, rgba(0, 212, 255, 0.15) 100%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        .category-hero .hero-content {
            max-width: 720px;
            padding: 60px 0;
        }
        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-dim);
            color: var(--accent);
            font-size: 0.85rem;
            font-weight: 500;
            padding: 6px 18px;
            border-radius: 30px;
            border: 1px solid rgba(0, 212, 255, 0.2);
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }
        .category-hero .hero-badge i {
            font-size: 0.8rem;
        }
        .category-hero h1 {
            font-size: 2.6rem;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: 0.01em;
        }
        .category-hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent), var(--purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero .hero-sub {
            font-size: 1.15rem;
            color: var(--text-primary);
            line-height: 1.7;
            margin-bottom: 30px;
            opacity: 0.9;
            max-width: 580px;
        }
        .category-hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .category-hero .hero-actions .btn-glow {
            padding: 16px 40px;
            font-size: 1.05rem;
        }
        .category-hero .hero-actions .btn-outline {
            padding: 14px 28px;
            font-size: 0.95rem;
        }

        @media (max-width: 639px) {
            .category-hero {
                min-height: 50vh;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-hero .hero-sub {
                font-size: 1rem;
            }
            .category-hero .hero-actions .btn-glow {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
        }

        /* ===== Section Spacing ===== */
        .section-pad {
            padding: var(--spacing-section) 0;
        }
        @media (max-width: 639px) {
            .section-pad {
                padding: var(--spacing-section-mobile) 0;
            }
        }

        .bg-alt {
            background: rgba(255, 255, 255, 0.02);
        }
        .bg-accent-soft {
            background: linear-gradient(180deg, rgba(0, 212, 255, 0.04), transparent);
        }

        /* ===== Glass Card ===== */
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px) saturate(180%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }
        .glass-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
            border-color: var(--border-glow);
        }

        /* ===== Feature Grid ===== */
        .features-grid .grid-x {
            gap: 24px 0;
        }
        .features-grid .glass-card {
            text-align: center;
            padding: 32px 22px;
            height: 100%;
        }
        .features-grid .glass-card .feat-icon {
            font-size: 2.4rem;
            color: var(--accent);
            margin-bottom: 16px;
            display: inline-block;
            background: var(--accent-dim);
            width: 64px;
            height: 64px;
            line-height: 64px;
            border-radius: 50%;
            transition: all var(--transition-base);
        }
        .features-grid .glass-card:hover .feat-icon {
            background: rgba(0, 212, 255, 0.2);
            transform: scale(1.05);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.15);
        }
        .features-grid .glass-card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 10px;
        }
        .features-grid .glass-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Steps / Process ===== */
        .steps-wrapper {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            justify-content: center;
            position: relative;
        }
        .step-item {
            flex: 1 1 280px;
            max-width: 320px;
            text-align: center;
            position: relative;
        }
        .step-item .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--purple));
            color: #fff;
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 16px;
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.2);
            transition: all var(--transition-base);
        }
        .step-item:hover .step-number {
            transform: scale(1.08);
            box-shadow: 0 0 40px rgba(0, 212, 255, 0.35);
        }
        .step-item .step-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
            display: block;
        }
        .step-item h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .step-arrow {
            display: none;
        }
        @media (min-width: 1024px) {
            .step-arrow {
                display: flex;
                align-items: center;
                font-size: 1.8rem;
                color: var(--accent);
                opacity: 0.3;
                position: absolute;
                right: -22px;
                top: 28px;
            }
            .step-item {
                position: relative;
            }
        }

        /* ===== Scenario Cards ===== */
        .scenario-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px) saturate(180%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            height: 100%;
            transition: all var(--transition-base);
        }
        .scenario-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-3px);
            border-color: var(--border-glow);
        }
        .scenario-card .scenario-icon {
            font-size: 2rem;
            color: var(--purple);
            margin-bottom: 14px;
        }
        .scenario-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
        }
        .scenario-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== FAQ Accordion ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(8px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition-base);
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.2);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            user-select: none;
            transition: background var(--transition-base);
        }
        .faq-item .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-item .faq-question h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-heading);
            margin: 0;
            flex: 1;
        }
        .faq-item .faq-question .faq-toggle {
            font-size: 1.2rem;
            color: var(--accent);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.open .faq-question .faq-toggle {
            transform: rotate(45deg);
        }
        .faq-item .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open {
            border-color: rgba(0, 212, 255, 0.25);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(10, 15, 30, 0.95), rgba(0, 212, 255, 0.08)),
                url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(10, 15, 30, 0.6);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 80px 20px;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: var(--text-primary);
            opacity: 0.85;
            margin-bottom: 32px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn-glow {
            padding: 18px 48px;
            font-size: 1.15rem;
        }
        @media (max-width: 639px) {
            .cta-section .container {
                padding: 50px 15px;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .btn-glow {
                padding: 14px 32px;
                font-size: 1rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #05080F;
            padding: 50px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .site-footer .footer-brand .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-heading);
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .site-footer .footer-brand .logo i {
            color: var(--accent);
            font-size: 1.4rem;
        }
        .site-footer .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }
        .site-footer h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .site-footer .footer-links a {
            display: block;
            color: var(--text-muted);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: color var(--transition-base), padding-left var(--transition-base);
        }
        .site-footer .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .site-footer .footer-social .social-icons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .site-footer .footer-social .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-muted);
            font-size: 1.2rem;
            transition: all var(--transition-base);
            border: 1px solid transparent;
        }
        .site-footer .footer-social .social-icons a:hover {
            background: var(--accent-dim);
            color: var(--accent);
            border-color: var(--border-glow);
            transform: translateY(-2px);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.1);
        }
        .site-footer .footer-bottom {
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
        }
        .site-footer .footer-bottom p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .site-footer .footer-bottom a {
            color: var(--text-muted);
            transition: color var(--transition-base);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 639px) {
            .site-footer .footer-brand p {
                max-width: 100%;
            }
            .site-footer .footer-links a {
                font-size: 0.85rem;
            }
            .site-footer .footer-social .social-icons a {
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }
        }

        /* ===== Additional Content Blocks ===== */
        .content-block {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            align-items: center;
        }
        .content-block .content-text {
            flex: 1 1 50%;
            min-width: 300px;
        }
        .content-block .content-image {
            flex: 1 1 40%;
            min-width: 280px;
        }
        .content-block .content-text h2 {
            font-size: 1.7rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .content-block .content-text p {
            font-size: 1rem;
            color: var(--text-primary);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .content-block .content-text ul {
            list-style: none;
            padding: 0;
            margin: 16px 0;
        }
        .content-block .content-text ul li {
            padding: 6px 0 6px 28px;
            position: relative;
            color: var(--text-primary);
            font-size: 0.98rem;
        }
        .content-block .content-text ul li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--accent);
            position: absolute;
            left: 0;
            top: 6px;
            font-size: 0.85rem;
        }
        .content-block .content-image img {
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            width: 100%;
            object-fit: cover;
        }
        @media (max-width: 767px) {
            .content-block {
                flex-direction: column;
                gap: 24px;
            }
            .content-block .content-text,
            .content-block .content-image {
                flex: 1 1 100%;
                min-width: auto;
            }
            .content-block .content-text h2 {
                font-size: 1.3rem;
            }
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--purple));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-btn-glow);
            cursor: pointer;
            transition: all var(--transition-base);
            z-index: 100;
            border: none;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.5), 0 0 50px rgba(123, 47, 255, 0.3);
        }
        @media (max-width: 639px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 14px 0;
            font-size: 0.85rem;
            color: var(--text-muted);
            background: transparent;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-base);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            margin: 0 8px;
            color: rgba(255, 255, 255, 0.2);
        }
        .breadcrumb .current {
            color: var(--text-heading);
        }

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 1023px) and (min-width: 640px) {
            .category-hero h1 {
                font-size: 2.2rem;
            }
            .features-grid .glass-card {
                padding: 24px 16px;
            }
        }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0A192F;
            --primary-light: #112240;
            --accent: #00D4FF;
            --accent-hover: #66E5FF;
            --purple: #7B2FFF;
            --purple-hover: #9A5FFF;
            --bg-dark: #0A0F1E;
            --bg-card: rgba(255, 255, 255, 0.05);
            --bg-card-hover: rgba(255, 255, 255, 0.09);
            --border-light: rgba(255, 255, 255, 0.10);
            --border-glow: rgba(0, 212, 255, 0.25);
            --text-primary: #E0E6ED;
            --text-heading: #FFFFFF;
            --text-muted: #8B949E;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-btn-glow: 12px;
            --radius-input: 6px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3), 0 0 40px rgba(123, 47, 255, 0.15);
            --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --nav-height: 70px;
            --container-max: 1200px;
            --gutter: 20px;
            --section-pad: 80px 0;
            --section-pad-mobile: 50px 0;
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: radial-gradient(ellipse at 20% 50%, rgba(10, 25, 50, 0.6) 0%, transparent 70%), radial-gradient(ellipse at 80% 20%, rgba(0, 212, 255, 0.04) 0%, transparent 50%);
            background-attachment: fixed;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 2px;
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--gutter);
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: rgba(8, 12, 20, 0.92);
            backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: var(--transition);
        }

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

        .site-header .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-heading);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .site-header .logo i {
            color: var(--accent);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 6px rgba(0, 212, 255, 0.4));
        }
        .site-header .logo span {
            background: linear-gradient(135deg, #fff 60%, var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-channels {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }
        .nav-channels a {
            padding: 8px 18px;
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            border-radius: 6px;
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-channels a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: transform 0.3s ease;
        }
        .nav-channels a:hover {
            color: var(--text-heading);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-channels a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-channels a.active {
            color: var(--text-heading);
            background: rgba(0, 212, 255, 0.08);
            text-shadow: 0 0 12px rgba(0, 212, 255, 0.15);
        }
        .nav-channels a.active::after {
            transform: translateX(-50%) scaleX(1);
            box-shadow: 0 0 8px var(--accent);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.07);
            border-radius: 20px;
            padding: 0 4px 0 16px;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.10);
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.08);
        }
        .nav-search input {
            background: transparent;
            border: none;
            color: var(--text-primary);
            padding: 8px 0;
            font-size: 0.9rem;
            min-width: 140px;
            outline: none;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
            opacity: 0.7;
        }
        .nav-search button {
            background: transparent;
            border: none;
            color: var(--text-muted);
            padding: 8px 12px;
            cursor: pointer;
            font-size: 0.95rem;
            transition: var(--transition);
            border-radius: 50%;
        }
        .nav-search button:hover {
            color: var(--accent);
        }

        .btn-outline {
            padding: 8px 20px;
            border: 1.5px solid var(--accent);
            border-radius: var(--radius-btn);
            color: var(--accent);
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            background: transparent;
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .btn-outline:hover {
            background: rgba(0, 212, 255, 0.12);
            color: var(--accent-hover);
            border-color: var(--accent-hover);
            transform: translateY(-1px);
        }
        .btn-outline:active {
            transform: scale(0.97);
        }

        .btn-glow {
            padding: 10px 28px;
            background: linear-gradient(135deg, var(--accent), var(--purple));
            border: none;
            border-radius: var(--radius-btn-glow);
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
            box-shadow: var(--shadow-glow);
            transition: var(--transition);
            cursor: pointer;
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
        }
        .btn-glow:hover {
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.5), 0 0 50px rgba(123, 47, 255, 0.3);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-glow:active {
            transform: scale(0.95);
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.3);
        }

        .hamburger {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-heading);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            border-radius: 6px;
            transition: var(--transition);
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        /* 移动端导航覆盖 */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            width: 100%;
            height: calc(100vh - var(--nav-height));
            background: rgba(8, 12, 20, 0.96);
            backdrop-filter: blur(20px);
            flex-direction: column;
            align-items: center;
            justify-content: flex-start;
            padding: 40px 20px;
            gap: 12px;
            z-index: 999;
            overflow-y: auto;
            border-top: 1px solid var(--border-light);
        }
        .mobile-nav-overlay.open {
            display: flex;
        }
        .mobile-nav-overlay a {
            color: var(--text-muted);
            font-size: 1.2rem;
            font-weight: 500;
            padding: 14px 20px;
            width: 100%;
            text-align: center;
            border-radius: 8px;
            transition: var(--transition);
        }
        .mobile-nav-overlay a:hover {
            color: var(--text-heading);
            background: rgba(255, 255, 255, 0.05);
        }
        .mobile-nav-overlay a.active {
            color: var(--text-heading);
            background: rgba(0, 212, 255, 0.08);
        }
        .mobile-nav-overlay .btn-glow {
            width: 100%;
            justify-content: center;
            margin-top: 16px;
            padding: 16px 28px;
            font-size: 1.1rem;
        }

        /* ===== Hero ===== */
        .page-hero {
            margin-top: var(--nav-height);
            padding: 120px 0 80px;
            position: relative;
            background: linear-gradient(135deg, rgba(10, 15, 30, 0.85), rgba(10, 25, 50, 0.75)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            min-height: 50vh;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-dark), transparent);
            pointer-events: none;
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            animation: fadeUp 0.8s ease forwards;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .page-hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent), var(--purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-hero p {
            font-size: 1.15rem;
            color: rgba(224, 230, 237, 0.85);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 600px;
        }
        .page-hero .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .page-hero .btn-glow {
            padding: 16px 40px;
            font-size: 1.1rem;
        }
        .page-hero .btn-outline {
            padding: 14px 36px;
            font-size: 1.05rem;
        }

        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--section-pad);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-heading);
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }
        .section-title-left {
            text-align: left;
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .section-subtitle-left {
            text-align: left;
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 520px;
            margin-bottom: 36px;
            line-height: 1.6;
        }

        /* ===== 玻璃卡片 ===== */
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px) saturate(180%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .glass-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 212, 255, 0.05);
            border-color: rgba(0, 212, 255, 0.15);
        }
        .glass-card .card-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 16px;
            filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.2));
        }
        .glass-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 10px;
        }
        .glass-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* ===== 卖点/特性网格 ===== */
        .features-grid .glass-card {
            text-align: center;
            padding: 36px 24px;
        }
        .features-grid .glass-card .card-icon {
            font-size: 2.4rem;
            margin-bottom: 20px;
        }

        /* ===== 步骤流程 ===== */
        .steps-row {
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
            justify-content: center;
            position: relative;
        }
        .step-item {
            flex: 1 1 220px;
            max-width: 280px;
            text-align: center;
            position: relative;
        }
        .step-item .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--purple));
            color: #fff;
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 18px;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
            position: relative;
            z-index: 2;
        }
        .step-item .step-icon {
            font-size: 1.6rem;
            color: var(--accent);
            margin-bottom: 12px;
            display: block;
        }
        .step-item h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .step-item::after {
            content: '→';
            position: absolute;
            top: 18px;
            right: -24px;
            font-size: 1.6rem;
            color: var(--accent);
            opacity: 0.5;
            font-weight: 300;
        }
        .step-item:last-child::after {
            display: none;
        }

        /* ===== 适用场景 ===== */
        .scene-card {
            display: flex;
            flex-direction: column;
        }
        .scene-card .scene-img {
            height: 180px;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
            overflow: hidden;
            background: var(--primary-light);
        }
        .scene-card .scene-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .scene-card .scene-body {
            padding: 20px;
            flex: 1;
        }
        .scene-card .scene-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
        }
        .scene-card .scene-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .scene-card .scene-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            background: rgba(0, 212, 255, 0.12);
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 500;
            margin-top: 12px;
            border: 1px solid rgba(0, 212, 255, 0.15);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 16px 0;
            transition: var(--transition);
        }
        .faq-item:first-child {
            border-top: 1px solid var(--border-light);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            padding: 8px 0;
            user-select: none;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--accent);
        }
        .faq-question h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-heading);
            margin: 0;
            transition: var(--transition);
        }
        .faq-question .faq-toggle {
            font-size: 1.3rem;
            color: var(--text-muted);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 16px;
        }
        .faq-item.open .faq-toggle {
            transform: rotate(45deg);
            color: var(--accent);
        }
        .faq-item.open .faq-question h3 {
            color: var(--accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 16px 0 0;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 12px 16px 8px 0;
        }
        .faq-answer p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(10, 25, 50, 0.9), rgba(20, 10, 40, 0.85)), url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            padding: 90px 0;
            text-align: center;
            position: relative;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(224, 230, 237, 0.8);
            max-width: 540px;
            margin: 0 auto 36px;
            line-height: 1.6;
        }
        .cta-section .btn-glow {
            padding: 18px 52px;
            font-size: 1.2rem;
        }

        /* ===== 系统支持 ===== */
        .support-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
            margin-top: 30px;
        }
        .support-badge {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--bg-card);
            backdrop-filter: blur(8px);
            border: 1px solid var(--border-light);
            border-radius: 40px;
            padding: 14px 28px;
            transition: var(--transition);
        }
        .support-badge:hover {
            background: var(--bg-card-hover);
            border-color: rgba(0, 212, 255, 0.2);
            transform: translateY(-2px);
        }
        .support-badge i {
            font-size: 1.6rem;
            color: var(--accent);
        }
        .support-badge span {
            font-weight: 600;
            color: var(--text-heading);
            font-size: 1rem;
        }
        .support-badge small {
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* ===== 图文区块 ===== */
        .content-block {
            display: flex;
            gap: 50px;
            align-items: center;
            flex-wrap: wrap;
        }
        .content-block .block-text {
            flex: 1 1 400px;
        }
        .content-block .block-image {
            flex: 1 1 360px;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .content-block .block-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        .content-block h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
        }
        .content-block p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .content-block ul {
            list-style: none;
            padding: 0;
            margin: 16px 0;
        }
        .content-block ul li {
            padding: 6px 0;
            color: var(--text-muted);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
        }
        .content-block ul li i {
            color: var(--accent);
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #05080F;
            padding: 50px 0 30px;
            border-top: 1px solid var(--border-light);
        }
        .site-footer .footer-brand .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
        }
        .site-footer .footer-brand .logo i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .site-footer .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
            max-width: 320px;
        }
        .site-footer h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 18px;
        }
        .site-footer .footer-links a {
            display: block;
            color: var(--text-muted);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .site-footer .social-icons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .site-footer .social-icons a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-light);
            color: var(--text-muted);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .site-footer .social-icons a:hover {
            background: rgba(0, 212, 255, 0.12);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-3px);
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.15);
        }
        .site-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .site-footer .footer-bottom a {
            color: var(--accent);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent-hover);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1023px) {
            .nav-channels {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .nav-actions .btn-outline,
            .nav-actions .btn-glow {
                display: none;
            }
            .nav-search {
                display: none;
            }
            .nav-actions .hamburger {
                display: block;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .cta-section h2 {
                font-size: 1.9rem;
            }
            .step-item::after {
                display: none;
            }
            .steps-row {
                gap: 20px;
            }
        }

        @media (max-width: 767px) {
            .page-hero {
                padding: 100px 0 60px;
                min-height: auto;
            }
            .page-hero h1 {
                font-size: 1.7rem;
            }
            .page-hero p {
                font-size: 0.95rem;
                margin-bottom: 24px;
            }
            .page-hero .hero-actions {
                flex-direction: column;
                gap: 12px;
            }
            .page-hero .btn-glow,
            .page-hero .btn-outline {
                width: 100%;
                justify-content: center;
                text-align: center;
            }
            .section {
                padding: var(--section-pad-mobile);
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
            .glass-card {
                padding: 20px 16px;
            }
            .cta-section {
                padding: 60px 0;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .btn-glow {
                padding: 14px 36px;
                font-size: 1rem;
            }
            .content-block {
                flex-direction: column;
                gap: 30px;
            }
            .content-block .block-text {
                flex: 1 1 100%;
            }
            .content-block .block-image {
                flex: 1 1 100%;
            }
            .site-footer .footer-brand p {
                max-width: 100%;
            }
            .support-badge {
                padding: 10px 20px;
                font-size: 0.9rem;
            }
            .step-item {
                flex: 1 1 100%;
                max-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.4rem;
            }
            .section-title {
                font-size: 1.2rem;
            }
            .page-hero .btn-glow {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
            .site-footer .grid-x .cell {
                margin-bottom: 24px;
            }
            .site-footer .social-icons {
                justify-content: center;
            }
        }

        /* ===== 辅助 ===== */
        .text-accent {
            color: var(--accent);
        }
        .mt-1 {
            margin-top: 16px;
        }
        .mt-2 {
            margin-top: 32px;
        }
        .mb-1 {
            margin-bottom: 16px;
        }
        .mb-2 {
            margin-bottom: 32px;
        }
        .text-center {
            text-align: center;
        }
        .gap-1 {
            gap: 20px;
        }

        /* ===== 移动端导航显示修正 ===== */
        @media (max-width: 1023px) {
            .nav-actions .hamburger {
                display: block !important;
            }
            .nav-actions .btn-outline,
            .nav-actions .btn-glow,
            .nav-search {
                display: none !important;
            }
        }
        @media (min-width: 1024px) {
            .hamburger {
                display: none !important;
            }
            .mobile-nav-overlay {
                display: none !important;
            }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0A192F;
            --primary-light: #112240;
            --accent: #00D4FF;
            --accent-hover: #66E5FF;
            --purple: #7B2FFF;
            --purple-hover: #9A5FFF;
            --bg-dark: #0A0F1E;
            --bg-card: rgba(255, 255, 255, 0.05);
            --bg-card-hover: rgba(255, 255, 255, 0.09);
            --border-light: rgba(255, 255, 255, 0.12);
            --border-glow: rgba(0, 212, 255, 0.25);
            --text-primary: #E0E6ED;
            --text-heading: #FFFFFF;
            --text-muted: #8B949E;
            --text-link: #00D4FF;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.4), 0 0 40px rgba(123, 47, 255, 0.2);
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-btn-glow: 12px;
            --radius-input: 6px;
            --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --nav-height: 70px;
            --container-max: 1200px;
            --gutter: 20px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg-dark);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--text-link);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--accent-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: rgba(8, 12, 20, 0.92);
            backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 1000;
            transition: background 0.3s ease;
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-heading);
            font-weight: 600;
            font-size: 1.35rem;
            letter-spacing: 0.5px;
            transition: opacity 0.25s;
        }
        .logo:hover {
            opacity: 0.85;
            color: var(--text-heading);
        }
        .logo i {
            font-size: 1.6rem;
            color: var(--accent);
            filter: drop-shadow(0 0 6px rgba(0, 212, 255, 0.4));
        }

        .nav-channels {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-channels a {
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 400;
            padding: 6px 16px;
            border-radius: 20px;
            transition: all 0.25s ease;
            position: relative;
        }
        .nav-channels a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: transform 0.3s ease;
        }
        .nav-channels a:hover::after,
        .nav-channels a.active::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-channels a:hover {
            color: var(--text-heading);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-channels a.active {
            color: var(--text-heading);
            font-weight: 600;
            background: rgba(0, 212, 255, 0.08);
        }

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

        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 20px;
            padding: 0 4px 0 16px;
            transition: background 0.3s, box-shadow 0.3s;
        }
        .nav-search:focus-within {
            background: rgba(255, 255, 255, 0.12);
            box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.2);
        }
        .nav-search input[type="search"] {
            background: transparent;
            border: none;
            color: var(--text-primary);
            padding: 8px 0;
            font-size: 0.9rem;
            width: 140px;
            outline: none;
        }
        .nav-search input[type="search"]::placeholder {
            color: var(--text-muted);
        }
        .nav-search button {
            background: transparent;
            border: none;
            color: var(--text-muted);
            padding: 8px 12px;
            cursor: pointer;
            border-radius: 0 20px 20px 0;
            transition: color 0.25s;
        }
        .nav-search button:hover {
            color: var(--accent);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border: 1.5px solid var(--accent);
            border-radius: var(--radius-btn);
            color: var(--text-heading);
            font-weight: 500;
            font-size: 0.9rem;
            background: transparent;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        .btn-outline:hover {
            background: rgba(0, 212, 255, 0.1);
            border-color: var(--accent-hover);
            color: var(--text-heading);
        }
        .btn-outline:active {
            transform: scale(0.96);
        }

        .btn-glow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 24px;
            border: none;
            border-radius: var(--radius-btn-glow);
            background: linear-gradient(135deg, var(--accent), var(--purple));
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.3), 0 0 40px rgba(123, 47, 255, 0.15);
            transition: all 0.3s ease;
            cursor: pointer;
            text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
        }
        .btn-glow:hover {
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.5), 0 0 60px rgba(123, 47, 255, 0.3);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-glow:active {
            transform: scale(0.95);
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.3);
        }

        .hamburger {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-heading);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.25s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        /* Mobile Nav Overlay */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            width: 100%;
            height: calc(100vh - var(--nav-height));
            background: rgba(8, 12, 20, 0.97);
            backdrop-filter: blur(20px);
            flex-direction: column;
            align-items: center;
            padding: 40px 20px;
            gap: 16px;
            z-index: 999;
        }
        .mobile-nav-overlay.open {
            display: flex;
        }
        .mobile-nav-overlay a {
            color: var(--text-muted);
            font-size: 1.1rem;
            padding: 12px 0;
            width: 100%;
            text-align: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: color 0.25s;
        }
        .mobile-nav-overlay a:hover,
        .mobile-nav-overlay a.active {
            color: var(--text-heading);
        }
        .mobile-nav-overlay .btn-glow {
            margin-top: 20px;
            width: 80%;
            justify-content: center;
            padding: 14px;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 90vh;
            display: flex;
            align-items: center;
            justify-content: flex-start;
            padding: calc(var(--nav-height) + 40px) 0 80px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 15, 30, 0.88) 40%, rgba(10, 15, 30, 0.6) 80%, rgba(0, 212, 255, 0.08) 100%);
            z-index: 1;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .hero-content {
            max-width: 700px;
            background: rgba(10, 25, 50, 0.7);
            backdrop-filter: blur(16px) saturate(180%);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-card);
            padding: 48px 44px;
            box-shadow: var(--shadow-card);
            animation: heroFadeIn 0.8s ease-out;
        }

        @keyframes heroFadeIn {
            0% {
                opacity: 0;
                transform: translateY(24px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .hero-content h1 {
            font-size: 2.6rem;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .hero-content h1 span {
            color: var(--accent);
        }
        .hero-content .subtitle {
            font-size: 1.15rem;
            color: var(--text-primary);
            line-height: 1.7;
            margin-bottom: 28px;
            opacity: 0.9;
        }
        .hero-content .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .hero-content .hero-cta .btn-glow {
            padding: 16px 40px;
            font-size: 1.1rem;
            border-radius: var(--radius-btn-glow);
        }
        .hero-content .hero-cta .btn-outline {
            padding: 14px 32px;
            font-size: 1rem;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.2);
            padding: 6px 18px;
            border-radius: 30px;
            color: var(--accent);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
        }
        .hero-badge i {
            font-size: 0.9rem;
        }

        /* ===== 板块通用 ===== */
        .section-padding {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-heading);
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

        .section-title-left {
            text-align: left;
        }
        .section-subtitle-left {
            text-align: left;
            margin-left: 0;
        }

        /* ===== Features / 优势 ===== */
        .features-section {
            background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(10, 25, 50, 0.6) 100%);
        }

        .feature-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px) saturate(180%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            height: 100%;
            transition: all 0.35s ease;
            text-align: center;
        }
        .feature-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-6px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
            border-color: rgba(0, 212, 255, 0.2);
        }
        .feature-card .icon {
            font-size: 2.4rem;
            color: var(--accent);
            margin-bottom: 18px;
            display: inline-block;
            background: rgba(0, 212, 255, 0.1);
            padding: 16px;
            border-radius: 50%;
            width: 72px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background 0.3s;
        }
        .feature-card:hover .icon {
            background: rgba(0, 212, 255, 0.18);
        }
        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-primary);
            line-height: 1.7;
            opacity: 0.85;
        }

        /* ===== Scenarios / 适用场景 ===== */
        .scenarios-section {
            background: var(--bg-dark);
        }

        .scenario-item {
            display: flex;
            gap: 28px;
            align-items: flex-start;
            background: var(--bg-card);
            backdrop-filter: blur(12px) saturate(180%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            margin-bottom: 20px;
            transition: all 0.3s ease;
        }
        .scenario-item:hover {
            background: var(--bg-card-hover);
            transform: translateX(4px);
            border-color: rgba(0, 212, 255, 0.15);
        }
        .scenario-item .num {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            color: #fff;
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.25);
        }
        .scenario-item .content h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 6px;
        }
        .scenario-item .content p {
            font-size: 0.95rem;
            color: var(--text-primary);
            line-height: 1.7;
            opacity: 0.85;
        }

        /* ===== 流程步骤 ===== */
        .steps-section {
            background: linear-gradient(180deg, rgba(10, 25, 50, 0.5) 0%, var(--bg-dark) 100%);
        }

        .step-card {
            text-align: center;
            background: var(--bg-card);
            backdrop-filter: blur(12px) saturate(180%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 32px 20px;
            height: 100%;
            position: relative;
            transition: all 0.35s ease;
        }
        .step-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3);
        }
        .step-card .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            color: #fff;
            margin: 0 auto 16px;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
        }
        .step-card .step-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 14px;
        }
        .step-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-primary);
            line-height: 1.7;
            opacity: 0.8;
        }

        .steps-connector {
            display: none;
        }

        /* ===== 用户反馈 ===== */
        .testimonials-section {
            background: var(--bg-dark);
        }

        .testimonial-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px) saturate(180%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            height: 100%;
            transition: all 0.35s ease;
        }
        .testimonial-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3);
        }
        .testimonial-card .user {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 14px;
        }
        .testimonial-card .user .avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
        }
        .testimonial-card .user .info .name {
            font-weight: 600;
            color: var(--text-heading);
            font-size: 1rem;
        }
        .testimonial-card .user .info .stars {
            color: #FFD700;
            font-size: 0.9rem;
            letter-spacing: 2px;
        }
        .testimonial-card .quote {
            font-size: 0.95rem;
            color: var(--text-primary);
            line-height: 1.7;
            opacity: 0.85;
            font-style: italic;
        }
        .testimonial-card .quote::before {
            content: '\201C';
            font-size: 1.6rem;
            color: var(--accent);
            margin-right: 4px;
            opacity: 0.6;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: rgba(10, 25, 50, 0.4);
        }

        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(8px) saturate(160%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.3s;
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.15);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            user-select: none;
            transition: background 0.25s;
        }
        .faq-item .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-item .faq-question h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-heading);
            margin: 0;
            flex: 1;
        }
        .faq-item .faq-question .toggle {
            font-size: 1.3rem;
            color: var(--text-muted);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.open .faq-question .toggle {
            transform: rotate(45deg);
            color: var(--accent);
        }
        .faq-item .faq-answer {
            max-height: 0;
            padding: 0 24px;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }
        .faq-item .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-primary);
            line-height: 1.8;
            opacity: 0.85;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(10, 25, 50, 0.9) 0%, rgba(20, 40, 80, 0.7) 100%),
                url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            position: relative;
            text-align: center;
            padding: 100px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.05) 0%, transparent 70%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: var(--text-primary);
            max-width: 520px;
            margin: 0 auto 32px;
            opacity: 0.9;
        }
        .cta-section .btn-glow {
            padding: 18px 48px;
            font-size: 1.15rem;
            border-radius: var(--radius-btn-glow);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.4), 0 0 60px rgba(123, 47, 255, 0.2);
        }
        .cta-section .btn-glow:hover {
            box-shadow: 0 0 50px rgba(0, 212, 255, 0.6), 0 0 80px rgba(123, 47, 255, 0.3);
            transform: translateY(-3px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #05080F;
            padding: 48px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .site-footer .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .site-footer .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }
        .site-footer h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 14px;
        }
        .site-footer .footer-links a {
            display: block;
            color: var(--text-muted);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: color 0.25s;
        }
        .site-footer .footer-links a:hover {
            color: var(--accent);
        }
        .site-footer .footer-social .social-icons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .site-footer .footer-social .social-icons a {
            color: var(--text-muted);
            font-size: 1.4rem;
            transition: color 0.25s, transform 0.25s;
        }
        .site-footer .footer-social .social-icons a:hover {
            color: var(--accent);
            transform: translateY(-2px);
        }
        .footer-bottom {
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
        }
        .footer-bottom p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
            transition: color 0.25s;
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== 空态 ===== */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
        }
        .empty-state i {
            font-size: 2.4rem;
            margin-bottom: 12px;
            opacity: 0.4;
        }
        .empty-state p {
            font-size: 1rem;
        }

        /* ===== 响应式 ===== */
        @media screen and (max-width: 1023px) {
            .nav-channels {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .nav-search input[type="search"] {
                width: 100px;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-content {
                padding: 36px 28px;
            }
            .section-padding {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .scenario-item {
                flex-direction: column;
                gap: 16px;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
        }

        @media screen and (max-width: 767px) {
            :root {
                --gutter: 15px;
            }
            .site-header .container {
                padding: 0 12px;
            }
            .nav-actions .btn-outline {
                display: none;
            }
            .nav-actions .btn-glow {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
            .nav-search input[type="search"] {
                width: 80px;
                font-size: 0.8rem;
            }
            .nav-search button {
                padding: 6px 8px;
            }
            .hero-section {
                min-height: 70vh;
                padding: calc(var(--nav-height) + 20px) 0 40px;
            }
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .hero-content .subtitle {
                font-size: 0.95rem;
            }
            .hero-content .hero-cta .btn-glow {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
            .hero-content .hero-cta .btn-outline {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .section-padding {
                padding: 40px 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
            .feature-card {
                padding: 24px 18px;
            }
            .step-card {
                padding: 24px 16px;
            }
            .testimonial-card {
                padding: 20px 18px;
            }
            .faq-item .faq-question {
                padding: 16px 18px;
            }
            .faq-item .faq-question h3 {
                font-size: 0.95rem;
            }
            .cta-section {
                padding: 60px 0;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .btn-glow {
                padding: 14px 32px;
                font-size: 1rem;
            }
            .site-footer {
                padding: 32px 0 24px;
            }
            .site-footer .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom p {
                font-size: 0.8rem;
            }
            .hero-content {
                padding: 28px 20px;
            }
        }

        @media screen and (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.35rem;
            }
            .hero-content .subtitle {
                font-size: 0.88rem;
            }
            .hero-content .hero-cta {
                flex-direction: column;
                gap: 12px;
            }
            .hero-content .hero-cta .btn-glow,
            .hero-content .hero-cta .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .nav-search input[type="search"] {
                width: 60px;
            }
            .nav-actions .btn-glow {
                padding: 6px 10px;
                font-size: 0.75rem;
                gap: 4px;
            }
            .section-title {
                font-size: 1.25rem;
            }
            .feature-card .icon {
                width: 56px;
                height: 56px;
                font-size: 1.8rem;
            }
            .step-card .step-number {
                width: 42px;
                height: 42px;
                font-size: 0.95rem;
            }
        }