/* roulang page: index */
:root {
            --bg-deep: #0B0C10;
            --bg-card: #16171B;
            --border-color: #2A2B30;
            --text-body: #E0E0E0;
            --text-muted: #888888;
            --cyan: #00E5FF;
            --pink: #FF007F;
            --radius-lg: 8px;
            --radius-md: 6px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
            --shadow-glow-cyan: 0 0 20px rgba(0, 229, 255, 0.25);
            --shadow-glow-pink: 0 0 20px rgba(255, 0, 127, 0.2);
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background-color: var(--bg-deep);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }
        a { text-decoration: none; color: inherit; transition: color 0.3s ease; }
        img { max-width: 100%; height: auto; display: block; }
        button { cursor: pointer; font-family: inherit; border: none; outline: none; }
        input, textarea { font-family: inherit; }

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

        /* 导航 */
        .main-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: 64px; backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
            background: rgba(11, 12, 16, 0.78); border-bottom: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }
        .main-header .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
        .nav-logo {
            display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.3rem;
            letter-spacing: -0.02em; color: #fff; white-space: nowrap;
            transition: color 0.3s ease;
        }
        .nav-logo:hover { color: var(--cyan); }
        .nav-logo-icon {
            width: 34px; height: 34px; border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--cyan), #00b8d4);
            display: flex; align-items: center; justify-content: center; flex-shrink: 0;
        }
        .nav-logo-icon svg { width: 20px; height: 20px; }
        .nav-links { display: flex; align-items: center; gap: 6px; list-style: none; }
        .nav-links a {
            display: inline-flex; align-items: center; padding: 8px 16px; border-radius: 6px;
            font-size: 0.925rem; font-weight: 500; color: var(--text-muted);
            transition: all 0.3s ease; white-space: nowrap; position: relative;
        }
        .nav-links a:hover { color: #fff; background: rgba(255, 255, 255, 0.04); }
        .nav-links a.active { color: var(--cyan); }
        .nav-links a.active::after {
            content: ''; position: absolute; bottom: -2px; left: 50%; transform: translateX(-50%);
            width: 24px; height: 3px; background: var(--cyan); border-radius: 2px;
        }
        .nav-cta-btn {
            display: inline-flex; align-items: center; padding: 9px 20px; border-radius: var(--radius-md);
            font-size: 0.9rem; font-weight: 600; color: #0B0C10; background: var(--cyan);
            transition: all 0.3s ease; white-space: nowrap; margin-left: 8px;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.2);
        }
        .nav-cta-btn:hover { background: #00f0ff; box-shadow: 0 0 28px rgba(0, 229, 255, 0.4); transform: translateY(-1px); }
        .nav-cta-btn:active { transform: scale(0.96); }

        /* 移动端菜单按钮 */
        .mobile-menu-btn { display: none; background: none; border: none; color: #fff; padding: 8px; border-radius: 6px; }
        .mobile-menu-btn:hover { background: rgba(255,255,255,0.06); }
        .mobile-menu-btn svg { width: 26px; height: 26px; }
        .mobile-menu-panel {
            display: none; position: fixed; top: 64px; left: 0; right: 0; bottom: 0; z-index: 999;
            background: rgba(11, 12, 16, 0.96); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
            flex-direction: column; align-items: center; justify-content: flex-start; padding-top: 40px; gap: 8px;
        }
        .mobile-menu-panel.open { display: flex; }
        .mobile-menu-panel a {
            display: block; padding: 14px 32px; font-size: 1.1rem; font-weight: 500; color: var(--text-muted);
            border-radius: 8px; transition: all 0.3s ease; text-align: center; width: 80%; max-width: 320px;
        }
        .mobile-menu-panel a:hover { color: #fff; background: rgba(255,255,255,0.05); }
        .mobile-menu-panel a.active { color: var(--cyan); }
        .mobile-menu-panel .mobile-cta {
            margin-top: 12px; background: var(--cyan); color: #0B0C10; font-weight: 600;
            box-shadow: 0 0 18px rgba(0,229,255,0.25);
        }
        .mobile-menu-panel .mobile-cta:hover { background: #00f0ff; color: #0B0C10; }

        /* Hero */
        .hero-section {
            position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center;
            text-align: center; overflow: hidden; padding: 100px 24px 80px;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            background-color: var(--bg-deep);
        }
        .hero-overlay {
            position: absolute; inset: 0; background: linear-gradient(180deg, rgba(11,12,16,0.65) 0%, rgba(11,12,16,0.88) 60%, var(--bg-deep) 100%);
            z-index: 1;
        }
        .hero-content { position: relative; z-index: 2; max-width: 800px; }
        .hero-badge {
            display: inline-block; padding: 6px 16px; border-radius: 20px; font-size: 0.85rem; font-weight: 600;
            border: 1px solid rgba(0,229,255,0.35); color: var(--cyan); margin-bottom: 24px;
            background: rgba(0,229,255,0.06); letter-spacing: 0.03em;
        }
        .hero-title { font-size: clamp(2.4rem, 5.5vw, 4rem); font-weight: 800; line-height: 1.15; color: #fff; margin-bottom: 20px; letter-spacing: -0.025em; }
        .hero-title .highlight { color: var(--cyan); }
        .hero-subtitle { font-size: 1.15rem; color: var(--text-muted); max-width: 550px; margin: 0 auto 36px; line-height: 1.65; }
        .hero-cta-group { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; }
        .btn-primary {
            display: inline-flex; align-items: center; gap: 8px; padding: 14px 30px; border-radius: var(--radius-md);
            font-size: 1rem; font-weight: 600; color: #0B0C10; background: var(--cyan);
            transition: all 0.3s ease; box-shadow: 0 0 22px rgba(0,229,255,0.28);
        }
        .btn-primary:hover { background: #00f0ff; box-shadow: 0 0 36px rgba(0,229,255,0.45); transform: translateY(-2px); }
        .btn-primary:active { transform: scale(0.96); }
        .btn-outline {
            display: inline-flex; align-items: center; gap: 8px; padding: 14px 30px; border-radius: var(--radius-md);
            font-size: 1rem; font-weight: 600; color: var(--cyan); background: transparent;
            border: 2px solid var(--cyan); transition: all 0.3s ease;
        }
        .btn-outline:hover { background: rgba(0,229,255,0.08); box-shadow: 0 0 24px rgba(0,229,255,0.2); transform: translateY(-2px); }
        .btn-outline:active { transform: scale(0.96); }

        /* 粒子动画（纯CSS） */
        .bg-particles { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
        .particle {
            position: absolute; width: 2px; height: 2px; background: var(--cyan); border-radius: 50%;
            animation: floatUp 6s infinite ease-in; opacity: 0;
        }
        .particle:nth-child(1) { left: 10%; animation-delay: 0s; animation-duration: 7s; }
        .particle:nth-child(2) { left: 25%; animation-delay: 1.5s; animation-duration: 5.5s; }
        .particle:nth-child(3) { left: 40%; animation-delay: 3s; animation-duration: 8s; }
        .particle:nth-child(4) { left: 55%; animation-delay: 0.8s; animation-duration: 6.2s; }
        .particle:nth-child(5) { left: 70%; animation-delay: 2.2s; animation-duration: 7.5s; }
        .particle:nth-child(6) { left: 85%; animation-delay: 4s; animation-duration: 5.8s; }
        .particle:nth-child(7) { left: 15%; animation-delay: 3.5s; animation-duration: 6.8s; }
        .particle:nth-child(8) { left: 60%; animation-delay: 1s; animation-duration: 7.2s; }
        @keyframes floatUp {
            0% { transform: translateY(100vh) scale(0); opacity: 0; }
            10% { opacity: 0.7; }
            40% { opacity: 0.4; transform: translateY(40vh) scale(1.2); }
            100% { transform: translateY(-10vh) scale(0); opacity: 0; }
        }

        /* 板块通用 */
        .section { padding: 80px 0; }
        .section-label {
            display: inline-block; font-size: 0.85rem; font-weight: 600; letter-spacing: 0.06em;
            color: var(--cyan); text-transform: uppercase; margin-bottom: 12px;
        }
        .section-title { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; color: #fff; margin-bottom: 14px; letter-spacing: -0.015em; }
        .section-desc { font-size: 1.05rem; color: var(--text-muted); max-width: 600px; margin-bottom: 40px; }

        /* 功能卡片网格 */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .feature-card {
            background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg);
            padding: 32px 28px; transition: all 0.35s ease; position: relative; overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .feature-card::before {
            content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
            background: linear-gradient(90deg, var(--cyan), var(--pink)); opacity: 0; transition: opacity 0.35s ease;
        }
        .feature-card:hover { transform: translateY(-6px); border-color: rgba(0,229,255,0.35); box-shadow: var(--shadow-glow-cyan); }
        .feature-card:hover::before { opacity: 1; }
        .feature-icon {
            width: 48px; height: 48px; border-radius: var(--radius-md); display: flex; align-items: center;
            justify-content: center; margin-bottom: 18px; background: rgba(0,229,255,0.1);
            font-size: 1.4rem; flex-shrink: 0;
        }
        .feature-card h3 { font-size: 1.2rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
        .feature-card p { font-size: 0.925rem; color: var(--text-muted); line-height: 1.6; }
        .feature-card .card-img { width: 100%; height: 160px; object-fit: cover; border-radius: 6px; margin-bottom: 16px; }

        /* 使用场景交替 */
        .scene-row { display: flex; align-items: center; gap: 48px; margin-bottom: 56px; }
        .scene-row.reverse { flex-direction: row-reverse; }
        .scene-text { flex: 1; }
        .scene-text h3 { font-size: 1.5rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
        .scene-text p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; margin-bottom: 16px; }
        .scene-text .tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
        .tag {
            display: inline-block; padding: 5px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 500;
            border: 1px solid var(--border-color); color: var(--text-muted); transition: all 0.3s ease;
        }
        .tag:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(0,229,255,0.05); }
        .scene-img-wrap { flex: 1; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-card); transition: all 0.35s ease; }
        .scene-img-wrap:hover { transform: scale(1.02); box-shadow: var(--shadow-glow-cyan); }
        .scene-img-wrap img { width: 100%; height: 300px; object-fit: cover; }

        /* 案例横向滚动 */
        .cases-scroll { display: flex; gap: 20px; overflow-x: auto; padding-bottom: 16px; scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; }
        .cases-scroll::-webkit-scrollbar { height: 6px; }
        .cases-scroll::-webkit-scrollbar-track { background: var(--bg-card); border-radius: 3px; }
        .cases-scroll::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
        .case-card {
            flex: 0 0 340px; scroll-snap-align: start; background: var(--bg-card); border: 1px solid var(--border-color);
            border-radius: var(--radius-lg); padding: 28px 24px; position: relative; transition: all 0.35s ease;
        }
        .case-card:hover { border-color: rgba(0,229,255,0.3); box-shadow: var(--shadow-glow-cyan); transform: translateY(-4px); }
        .case-card .quote-icon { font-size: 2.5rem; color: var(--cyan); opacity: 0.4; line-height: 1; margin-bottom: 10px; }
        .case-card h4 { font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
        .case-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }

        /* 价格卡片 */
        .pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
        .price-card {
            background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg);
            padding: 36px 28px; text-align: center; transition: all 0.35s ease; position: relative;
            box-shadow: var(--shadow-card); display: flex; flex-direction: column;
        }
        .price-card:hover { transform: translateY(-4px); }
        .price-card.featured { border-color: var(--cyan); box-shadow: var(--shadow-glow-cyan); }
        .price-badge {
            position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--cyan);
            color: #0B0C10; font-size: 0.8rem; font-weight: 700; padding: 5px 16px; border-radius: 20px;
            letter-spacing: 0.04em;
        }
        .price-card h3 { font-size: 1.2rem; font-weight: 700; color: #fff; margin-bottom: 10px; }
        .price-amount { font-size: 2.5rem; font-weight: 800; color: var(--cyan); margin-bottom: 8px; }
        .price-amount span { font-size: 1rem; font-weight: 400; color: var(--text-muted); }
        .price-features { list-style: none; text-align: left; margin: 20px 0 28px; flex-grow: 1; }
        .price-features li { padding: 7px 0; font-size: 0.9rem; color: var(--text-muted); border-bottom: 1px solid rgba(255,255,255,0.04); }
        .price-features li::before { content: '✓ '; color: var(--cyan); font-weight: 700; margin-right: 6px; }
        .price-card .btn-primary { width: 100%; justify-content: center; }
        .price-card .btn-outline { width: 100%; justify-content: center; }

        /* FAQ */
        .faq-list { max-width: 760px; margin: 0 auto; }
        .faq-item {
            border-bottom: 1px solid var(--border-color); padding: 20px 0; cursor: pointer;
            transition: all 0.3s ease;
        }
        .faq-item:hover { border-bottom-color: rgba(0,229,255,0.3); }
        .faq-question { font-size: 1.05rem; font-weight: 600; color: #fff; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
        .faq-question .faq-icon { font-size: 1.3rem; color: var(--cyan); transition: transform 0.3s ease; flex-shrink: 0; }
        .faq-item.open .faq-icon { transform: rotate(45deg); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; }
        .faq-item.open .faq-answer { max-height: 300px; padding-top: 12px; }
        .faq-answer p { font-size: 0.925rem; color: var(--text-muted); line-height: 1.65; }

        /* CTA区块 */
        .cta-section {
            background: linear-gradient(135deg, rgba(0,229,255,0.06) 0%, rgba(255,0,127,0.04) 100%);
            border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 56px 32px;
            text-align: center; box-shadow: var(--shadow-card);
        }
        .cta-section h2 { font-size: 1.8rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
        .cta-section p { color: var(--text-muted); max-width: 500px; margin: 0 auto 28px; font-size: 1rem; }

        /* 页脚 */
        .main-footer {
            background: #0e0f13; border-top: 1px solid var(--border-color); padding: 56px 0 32px; margin-top: 60px;
        }
        .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 36px; }
        .footer-col h4 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
        .footer-col p, .footer-col a { font-size: 0.9rem; color: var(--text-muted); line-height: 1.8; display: block; transition: color 0.3s ease; }
        .footer-col a:hover { color: var(--cyan); }
        .footer-logo { font-weight: 800; font-size: 1.2rem; color: #fff; margin-bottom: 10px; display: block; }
        .footer-bottom { text-align: center; padding-top: 28px; margin-top: 28px; border-top: 1px solid rgba(255,255,255,0.06); font-size: 0.85rem; color: var(--text-muted); }
        .social-icons { display: flex; gap: 12px; margin-top: 12px; }
        .social-icons a {
            width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--border-color);
            display: flex; align-items: center; justify-content: center; transition: all 0.3s ease;
            color: var(--text-muted);
        }
        .social-icons a:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(0,229,255,0.06); box-shadow: 0 0 14px rgba(0,229,255,0.15); }

        /* 响应式 */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .pricing-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .scene-row { flex-direction: column; gap: 24px; }
            .scene-row.reverse { flex-direction: column; }
            .scene-img-wrap img { height: 240px; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-cta-btn { display: none; }
            .mobile-menu-btn { display: flex; align-items: center; justify-content: center; }
            .features-grid { grid-template-columns: 1fr; }
            .pricing-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
            .section { padding: 56px 0; }
            .hero-title { font-size: 2rem; }
            .hero-subtitle { font-size: 1rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .cases-scroll { gap: 14px; }
            .case-card { flex: 0 0 280px; }
            .cta-section { padding: 36px 20px; }
            .scene-img-wrap img { height: 200px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-section { padding: 80px 16px 60px; min-height: auto; }
            .hero-title { font-size: 1.7rem; }
            .hero-cta-group { flex-direction: column; gap: 10px; width: 100%; }
            .hero-cta-group .btn-primary, .hero-cta-group .btn-outline { width: 100%; justify-content: center; }
            .feature-card { padding: 24px 20px; }
            .price-card { padding: 28px 20px; }
            .section-title { font-size: 1.4rem; }
            .case-card { flex: 0 0 250px; padding: 20px 16px; }
        }

/* roulang page: category1 */
:root {
            --bg-deep: #0B0C10;
            --bg-card: #16171B;
            --border-subtle: #2A2B30;
            --text-body: #E0E0E0;
            --text-muted: #888888;
            --primary: #00E5FF;
            --accent: #FF007F;
            --radius-lg: 8px;
            --radius-md: 6px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.25);
            --shadow-glow-accent: 0 0 18px rgba(255, 0, 127, 0.22);
            --transition-base: all 0.3s ease;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-body);
            line-height: 1.7;
            min-height: 100vh;
            font-size: 16px;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        /* ========== CONTAINER ========== */
        .container-main {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

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

        /* ========== HEADER / NAV ========== */
        .main-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 64px;
            background: rgba(11, 12, 16, 0.78);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            transition: var(--transition-base);
        }

        .main-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            letter-spacing: 0.04em;
            color: #fff;
            white-space: nowrap;
            transition: var(--transition-base);
            text-decoration: none;
        }

        .nav-logo:hover {
            color: var(--primary);
            text-shadow: 0 0 18px rgba(0, 229, 255, 0.4);
        }

        .nav-logo-icon {
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .nav-logo-icon svg {
            width: 100%;
            height: 100%;
        }

        .nav-logo-icon svg rect {
            fill: var(--primary);
            transition: var(--transition-base);
        }

        .nav-logo:hover .nav-logo-icon svg rect {
            fill: #fff;
        }

        .main-header nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-links {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
            padding: 0;
        }

        .nav-links li {
            margin: 0;
        }

        .nav-links a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            font-weight: 500;
            color: #b0b0b0;
            position: relative;
            transition: var(--transition-base);
            white-space: nowrap;
            text-decoration: none;
        }

        .nav-links a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-links a.active {
            color: var(--primary);
            background: rgba(0, 229, 255, 0.07);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
            box-shadow: 0 0 10px rgba(0, 229, 255, 0.6);
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 22px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9rem;
            background: var(--primary);
            color: #0B0C10;
            white-space: nowrap;
            transition: var(--transition-base);
            box-shadow: 0 0 14px rgba(0, 229, 255, 0.3);
            text-decoration: none;
            margin-left: 8px;
        }

        .nav-cta-btn:hover {
            background: #33eaff;
            box-shadow: 0 0 26px rgba(0, 229, 255, 0.55);
            transform: translateY(-1px);
            color: #0B0C10;
        }

        .nav-cta-btn:active {
            transform: scale(0.96);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            width: 40px;
            height: 40px;
            padding: 8px;
            color: #fff;
            border-radius: var(--radius-md);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .mobile-menu-btn:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .mobile-menu-btn svg {
            width: 100%;
            height: 100%;
        }

        @media (max-width: 1023px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(11, 12, 16, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--border-subtle);
                padding: 12px 24px 20px;
                gap: 4px;
                z-index: 999;
            }
            .nav-links.mobile-open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: var(--radius-md);
            }
            .nav-links a.active::after {
                display: none;
            }
            .nav-links a.active {
                border-left: 3px solid var(--primary);
                border-radius: 0 var(--radius-md) var(--radius-md) 0;
            }
            .nav-cta-btn {
                margin-left: 0;
                margin-top: 8px;
                width: 100%;
                text-align: center;
                display: none;
            }
            .nav-cta-btn.mobile-open-cta {
                display: flex;
            }
            .mobile-menu-btn {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .main-header .container {
                padding: 0 16px;
            }
        }

        @media (min-width: 1024px) {
            .nav-links {
                display: flex !important;
            }
            .nav-cta-btn {
                display: inline-flex !important;
            }
        }

        /* ========== HERO ========== */
        .hero-category {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            padding-top: 64px;
            background: var(--bg-deep);
        }

        .hero-category-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.35;
        }

        .hero-category-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: radial-gradient(ellipse at center, rgba(11, 12, 16, 0.4) 0%, rgba(11, 12, 16, 0.85) 70%, rgba(11, 12, 16, 0.95) 100%);
        }

        /* 粒子光效 */
        .hero-particles {
            position: absolute;
            inset: 0;
            z-index: 2;
            pointer-events: none;
            overflow: hidden;
        }

        .hero-particle {
            position: absolute;
            width: 3px;
            height: 3px;
            background: var(--primary);
            border-radius: 50%;
            opacity: 0;
            animation: particleFloat 8s infinite ease-in-out;
            box-shadow: 0 0 8px var(--primary);
        }

        .hero-particle:nth-child(1) {
            left: 10%;
            top: 30%;
            animation-delay: 0s;
            animation-duration: 9s;
        }
        .hero-particle:nth-child(2) {
            left: 25%;
            top: 55%;
            animation-delay: 1.5s;
            animation-duration: 10s;
            background: var(--accent);
            box-shadow: 0 0 8px var(--accent);
        }
        .hero-particle:nth-child(3) {
            left: 45%;
            top: 20%;
            animation-delay: 3s;
            animation-duration: 7.5s;
        }
        .hero-particle:nth-child(4) {
            left: 60%;
            top: 65%;
            animation-delay: 2s;
            animation-duration: 11s;
        }
        .hero-particle:nth-child(5) {
            left: 75%;
            top: 35%;
            animation-delay: 4s;
            animation-duration: 8.5s;
            background: var(--accent);
            box-shadow: 0 0 8px var(--accent);
        }
        .hero-particle:nth-child(6) {
            left: 88%;
            top: 50%;
            animation-delay: 5.5s;
            animation-duration: 9.5s;
        }
        .hero-particle:nth-child(7) {
            left: 15%;
            top: 75%;
            animation-delay: 2.8s;
            animation-duration: 10.5s;
        }
        .hero-particle:nth-child(8) {
            left: 50%;
            top: 80%;
            animation-delay: 6s;
            animation-duration: 8s;
            background: var(--accent);
            box-shadow: 0 0 8px var(--accent);
        }

        @keyframes particleFloat {
            0% {
                opacity: 0;
                transform: translateY(0) scale(0.5);
            }
            10% {
                opacity: 0.9;
            }
            30% {
                opacity: 0.6;
                transform: translateY(-40px) scale(1.3);
            }
            60% {
                opacity: 0.2;
                transform: translateY(-80px) scale(0.8);
            }
            100% {
                opacity: 0;
                transform: translateY(-140px) scale(0.3);
            }
        }

        .hero-category-content {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 800px;
            padding: 60px 24px;
        }

        .hero-category-eyebrow {
            display: inline-block;
            padding: 6px 16px;
            border: 1px solid var(--primary);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--primary);
            letter-spacing: 0.06em;
            margin-bottom: 20px;
            background: rgba(0, 229, 255, 0.06);
        }

        .hero-category-content h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.02em;
            line-height: 1.2;
            margin-bottom: 18px;
        }

        .hero-category-content h1 .highlight {
            background: linear-gradient(135deg, var(--primary), #66f0ff);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-category-content .hero-subtitle {
            font-size: 1.15rem;
            color: #b0b0b0;
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }

        .hero-cta-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary-lg {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            border-radius: var(--radius-lg);
            font-weight: 600;
            font-size: 1rem;
            background: var(--primary);
            color: #0B0C10;
            transition: var(--transition-base);
            box-shadow: var(--shadow-glow);
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary-lg:hover {
            background: #33eaff;
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.6);
            transform: translateY(-2px);
            color: #0B0C10;
        }
        .btn-primary-lg:active {
            transform: scale(0.96);
        }

        .btn-outline-lg {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            border-radius: var(--radius-lg);
            font-weight: 600;
            font-size: 1rem;
            background: transparent;
            color: #fff;
            border: 2px solid var(--primary);
            transition: var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-outline-lg:hover {
            background: rgba(0, 229, 255, 0.08);
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.3);
            border-color: #33eaff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline-lg:active {
            transform: scale(0.96);
        }

        @media (max-width: 768px) {
            .hero-category {
                min-height: 70vh;
            }
            .hero-category-content h1 {
                font-size: 2rem;
            }
            .hero-category-content .hero-subtitle {
                font-size: 1rem;
            }
            .hero-category-content {
                padding: 40px 16px;
            }
            .btn-primary-lg,
            .btn-outline-lg {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
            .hero-cta-group {
                gap: 10px;
            }
        }

        @media (max-width: 520px) {
            .hero-category-content h1 {
                font-size: 1.6rem;
            }
            .hero-cta-group {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary-lg,
            .btn-outline-lg {
                width: 100%;
                max-width: 300px;
            }
        }

        /* ========== SECTION COMMONS ========== */
        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
        }

        @media (max-width: 768px) {
            .section {
                padding: 50px 0;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ========== TAG CLOUD ========== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            padding: 12px 0;
            max-width: 800px;
            margin: 0 auto;
        }

        .tag-badge {
            display: inline-block;
            padding: 7px 16px;
            border: 1px solid var(--border-subtle);
            border-radius: 20px;
            font-size: 0.85rem;
            color: #c0c0c0;
            transition: var(--transition-base);
            cursor: default;
            background: var(--bg-card);
            white-space: nowrap;
        }

        .tag-badge:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.2);
            background: rgba(0, 229, 255, 0.05);
        }

        .tag-badge.accent-tag {
            border-color: rgba(255, 0, 127, 0.35);
        }
        .tag-badge.accent-tag:hover {
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: 0 0 12px rgba(255, 0, 127, 0.25);
            background: rgba(255, 0, 127, 0.05);
        }

        /* ========== CARDS GRID ========== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            max-width: 1100px;
            margin: 0 auto;
        }

        .card-feature {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .card-feature::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition-base);
        }

        .card-feature:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 229, 255, 0.4);
            box-shadow: var(--shadow-glow), var(--shadow-card);
        }
        .card-feature:hover::before {
            opacity: 1;
        }

        .card-feature .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            background: rgba(0, 229, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            flex-shrink: 0;
            transition: var(--transition-base);
        }

        .card-feature:hover .card-icon {
            background: rgba(0, 229, 255, 0.2);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
        }

        .card-feature h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
        }

        .card-feature p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.65;
            flex-grow: 1;
        }

        .card-feature .card-stat {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.03em;
        }

        .card-feature .card-stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        @media (max-width: 1023px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }

        @media (max-width: 640px) {
            .cards-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .card-feature {
                padding: 24px 20px;
            }
        }

        /* ========== ALTERNATING SCENES ========== */
        .scene-row {
            display: flex;
            align-items: center;
            gap: 50px;
            max-width: 1100px;
            margin: 0 auto 48px;
            padding: 0;
        }

        .scene-row.reverse {
            flex-direction: row-reverse;
        }

        .scene-row:last-of-type {
            margin-bottom: 0;
        }

        .scene-image {
            flex: 1 1 48%;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            position: relative;
        }

        .scene-image img {
            width: 100%;
            height: auto;
            transition: var(--transition-base);
            display: block;
        }

        .scene-image:hover {
            transform: scale(1.02);
            box-shadow: var(--shadow-glow), var(--shadow-card);
        }
        .scene-image:hover img {
            transform: scale(1.04);
        }

        .scene-text {
            flex: 1 1 48%;
        }

        .scene-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .scene-text p {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 8px;
        }

        .scene-text .scene-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 14px;
            background: rgba(0, 229, 255, 0.1);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 500;
            margin-bottom: 10px;
        }

        @media (max-width: 768px) {
            .scene-row,
            .scene-row.reverse {
                flex-direction: column;
                gap: 24px;
                margin-bottom: 36px;
            }
            .scene-text h3 {
                font-size: 1.35rem;
            }
        }

        /* ========== PROCESS STEPS ========== */
        .process-steps {
            display: flex;
            gap: 20px;
            max-width: 1000px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }

        .process-step {
            flex: 0 1 180px;
            text-align: center;
            padding: 28px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            transition: var(--transition-base);
            position: relative;
            box-shadow: var(--shadow-card);
        }

        .process-step:hover {
            transform: translateY(-3px);
            border-color: rgba(0, 229, 255, 0.4);
            box-shadow: var(--shadow-glow);
        }

        .process-step .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), #33c8e0);
            color: #0B0C10;
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            box-shadow: 0 0 14px rgba(0, 229, 255, 0.3);
        }

        .process-step h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }

        .process-step p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        @media (max-width: 768px) {
            .process-steps {
                flex-direction: column;
                align-items: center;
            }
            .process-step {
                flex: 1 1 auto;
                width: 100%;
                max-width: 360px;
            }
        }

        /* ========== STATS BAR ========== */
        .stats-bar {
            display: flex;
            gap: 30px;
            max-width: 900px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }

        .stat-item {
            text-align: center;
            padding: 24px 20px;
            flex: 0 1 200px;
        }

        .stat-item .stat-value {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.03em;
            line-height: 1;
            text-shadow: 0 0 20px rgba(0, 229, 255, 0.35);
        }

        .stat-item .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-top: 8px;
        }

        @media (max-width: 640px) {
            .stat-item .stat-value {
                font-size: 2.2rem;
            }
            .stats-bar {
                gap: 16px;
            }
            .stat-item {
                flex: 0 1 140px;
                padding: 16px 10px;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 750px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition-base);
            box-shadow: var(--shadow-card);
        }

        .faq-item:hover {
            border-color: rgba(0, 229, 255, 0.3);
        }

        .faq-question {
            width: 100%;
            padding: 20px 24px;
            text-align: left;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            background: transparent;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition-base);
            border: none;
            outline: none;
            gap: 16px;
        }

        .faq-question:hover {
            color: var(--primary);
            background: rgba(0, 229, 255, 0.03);
        }

        .faq-question:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: -2px;
            border-radius: var(--radius-lg);
        }

        .faq-icon {
            width: 22px;
            height: 22px;
            flex-shrink: 0;
            transition: transform 0.3s ease;
            color: var(--primary);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(160deg, var(--bg-card) 0%, #111318 60%, var(--bg-deep) 100%);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
            text-align: center;
            padding: 70px 24px;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 500px;
            margin: 0 auto 28px;
        }

        @media (max-width: 640px) {
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section {
                padding: 48px 16px;
            }
        }

        /* ========== FOOTER ========== */
        .main-footer {
            background: #0e0f14;
            border-top: 1px solid var(--border-subtle);
            padding: 56px 0 28px;
            color: #c0c0c0;
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 36px;
        }

        .footer-col {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-logo {
            font-weight: 700;
            font-size: 1.2rem;
            color: #fff;
            letter-spacing: 0.04em;
            margin-bottom: 4px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 4px;
            letter-spacing: 0.03em;
        }

        .footer-col p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        .footer-col a {
            font-size: 0.88rem;
            color: #a0a0a0;
            transition: var(--transition-base);
            text-decoration: none;
        }

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

        .social-icons {
            display: flex;
            gap: 12px;
            margin-top: 8px;
        }

        .social-icons a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            color: #a0a0a0;
            transition: var(--transition-base);
        }

        .social-icons a:hover {
            background: rgba(0, 229, 255, 0.15);
            color: var(--primary);
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.25);
        }

        .footer-bottom {
            margin-top: 36px;
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 540px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .main-footer {
                padding: 40px 0 20px;
            }
            .main-footer .container {
                padding: 0 16px;
            }
        }

        /* ========== UTILITY ========== */
        .text-primary-glow {
            color: var(--primary);
            text-shadow: 0 0 14px rgba(0, 229, 255, 0.4);
        }

        .divider {
            width: 50px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
            margin: 16px auto;
            box-shadow: 0 0 10px rgba(0, 229, 255, 0.4);
        }

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

        @media (max-width: 1023px) {
            .hide-mobile {
                display: none !important;
            }
        }
        @media (min-width: 1024px) {
            .show-mobile-only {
                display: none !important;
            }
        }