:root {
            --bg-deep: #05050A;
            --bg-card: rgba(15, 23, 42, 0.55);
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-glow: rgba(59, 130, 246, 0.25);
            --blue-400: #60A5FA;
            --blue-500: #3B82F6;
            --blue-600: #2563EB;
            --text-primary: #EDEDF0;
            --text-secondary: #9CA3AF;
            --text-muted: #6B7280;
            --amber: #FBBF24;
            --radius-xl: 32px;
            --radius-2xl: 48px;
            --radius-3xl: 64px;
            --transition-fast: 0.2s;
            --transition-smooth: 0.25s;
        }

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

        body {
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: var(--bg-deep);
            color: var(--text-primary);
            overflow-x: hidden;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        .glow-bg {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
            background:
                radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.07) 0%, rgba(5, 5, 10, 0) 60%),
                radial-gradient(circle at 75% 60%, rgba(6, 182, 212, 0.04) 0%, rgba(5, 5, 10, 0) 50%);
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
            position: relative;
            z-index: 2;
        }

        /* ── Header ── */
        header {
            background: rgba(5, 5, 10, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 0;
            flex-wrap: wrap;
        }
        .logo {
            font-size: 1.6rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            background: linear-gradient(125deg, #FFFFFF, #3B82F6);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-decoration: none;
            white-space: nowrap;
        }
        .logo .icon-rocket {
            display: inline-block;
            margin-right: 2px;
        }
        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #A1A1AA;
            transition: var(--transition-fast);
            font-size: 0.9rem;
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--blue-500);
        }

        /* ── Hero ── */
        .hero {
            padding: 90px 0 70px;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 0.9fr;
            gap: 56px;
            align-items: center;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(59, 130, 246, 0.12);
            border: 1px solid rgba(59, 130, 246, 0.28);
            padding: 6px 18px;
            border-radius: 60px;
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--blue-400);
            margin-bottom: 24px;
            letter-spacing: 0.01em;
        }
        .hero h1 {
            font-size: 3.6rem;
            font-weight: 800;
            line-height: 1.18;
            letter-spacing: -0.025em;
            margin-bottom: 20px;
        }
        .hero-gradient {
            background: linear-gradient(135deg, #FFFFFF 20%, #3B82F6 55%, #06B6D4 90%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 500px;
            line-height: 1.65;
        }
        .stats-row {
            display: flex;
            gap: 44px;
            margin: 32px 0 28px;
            flex-wrap: wrap;
        }
        .stat h4 {
            font-size: 1.75rem;
            font-weight: 700;
            color: #fff;
        }
        .stat p {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 2px;
        }
        .btn-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary-glow {
            background: linear-gradient(105deg, #3B82F6, #2563EB);
            color: #fff;
            padding: 14px 34px;
            border-radius: 60px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition-fast);
            box-shadow: 0 0 18px rgba(59, 130, 246, 0.3);
            display: inline-block;
            font-size: 0.95rem;
        }
        .btn-primary-glow:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(59, 130, 246, 0.5);
        }
        .btn-outline-light {
            background: transparent;
            border: 1.5px solid var(--blue-500);
            color: var(--blue-500);
            padding: 14px 34px;
            border-radius: 60px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition-fast);
            display: inline-block;
            font-size: 0.95rem;
        }
        .btn-outline-light:hover {
            background: rgba(59, 130, 246, 0.1);
        }

        /* Hero右侧卡片 */
        .hero-card {
            background: rgba(15, 23, 42, 0.6);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: var(--radius-2xl);
            border: 1px solid rgba(59, 130, 246, 0.2);
            padding: 36px 28px;
            text-align: center;
        }
        .rating-wrap {
            margin-bottom: 20px;
        }
        .stars {
            color: var(--amber);
            font-size: 1.35rem;
            letter-spacing: 3px;
        }
        .platform-icons {
            display: flex;
            justify-content: center;
            gap: 18px;
            margin: 22px 0;
            flex-wrap: wrap;
        }
        .platform-icons span {
            background: #1E293B;
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.84rem;
            font-weight: 500;
        }
        .protocol-row {
            display: flex;
            justify-content: center;
            gap: 22px;
            margin: 24px 0;
            font-size: 0.84rem;
            color: #94A3B8;
            flex-wrap: wrap;
        }

        /* ── 设备卡片下载导航 ── */
        .device-nav-section {
            padding: 20px 0 70px;
        }
        .device-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(175px, 1fr));
            gap: 18px;
        }
        .device-card {
            background: rgba(15, 23, 42, 0.5);
            border-radius: 24px;
            padding: 26px 18px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.06);
            text-decoration: none;
            color: var(--text-primary);
            transition: var(--transition-smooth);
            display: block;
        }
        .device-card:hover {
            border-color: var(--blue-500);
            background: rgba(30, 41, 59, 0.6);
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(59, 130, 246, 0.12);
        }
        .device-card .dc-icon {
            font-size: 2.4rem;
            margin-bottom: 12px;
            display: block;
        }
        .device-card .dc-title {
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 4px;
        }
        .device-card .dc-sub {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* ── Section通用 ── */
        .section-block {
            padding: 70px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .section-title {
            text-align: center;
            font-size: 2.1rem;
            font-weight: 700;
            margin-bottom: 48px;
            letter-spacing: -0.01em;
        }
        .section-title .highlight {
            background: linear-gradient(135deg, #60A5FA, #3B82F6);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        /* ── 核心能力6模块 ── */
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 28px;
        }
        .capability-tile {
            background: rgba(15, 23, 42, 0.5);
            border-radius: var(--radius-xl);
            padding: 34px 28px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            transition: var(--transition-smooth);
        }
        .capability-tile:hover {
            border-color: rgba(59, 130, 246, 0.35);
            background: rgba(30, 41, 59, 0.55);
        }
        .capability-tile .cap-icon {
            font-size: 2.4rem;
            margin-bottom: 16px;
            display: block;
        }
        .capability-tile h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            font-weight: 700;
        }
        .capability-tile p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 10px;
        }
        .capability-tile .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 12px;
        }
        .capability-tile .tag {
            background: rgba(59, 130, 246, 0.1);
            border: 1px solid rgba(59, 130, 246, 0.2);
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 0.78rem;
            color: var(--blue-400);
            white-space: nowrap;
        }
        .capability-tile .inner-link {
            display: inline-block;
            margin-top: 14px;
            color: var(--blue-500);
            font-weight: 600;
            font-size: 0.88rem;
            text-decoration: none;
            transition: var(--transition-fast);
        }
        .capability-tile .inner-link:hover {
            color: #93C5FD;
            text-decoration: underline;
        }

        /* ── 使用场景卡片 ── */
        .scene-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
            gap: 20px;
        }
        .scene-card {
            background: rgba(15, 23, 42, 0.5);
            border-radius: 24px;
            padding: 28px 20px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.05);
            text-decoration: none;
            color: var(--text-primary);
            transition: var(--transition-smooth);
            display: block;
        }
        .scene-card:hover {
            border-color: var(--blue-500);
            background: rgba(30, 41, 59, 0.55);
            transform: translateY(-2px);
        }
        .scene-card .sc-icon {
            font-size: 2.6rem;
            display: block;
            margin-bottom: 14px;
        }
        .scene-card .sc-title {
            font-weight: 700;
            font-size: 1.05rem;
        }
        .scene-card .sc-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ── 新手时间轴 ── */
        .timeline {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
        }
        .timeline-step {
            background: rgba(15, 23, 42, 0.5);
            border-radius: 20px;
            padding: 22px 20px;
            text-align: center;
            flex: 1 1 160px;
            max-width: 200px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            position: relative;
        }
        .timeline-step .ts-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            margin-bottom: 10px;
        }
        .timeline-step h4 {
            font-size: 0.95rem;
            margin-bottom: 4px;
        }
        .timeline-step p {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* ── CTA ── */
        .cta-block {
            padding: 70px 0;
            text-align: center;
        }
        .cta-glow {
            background: linear-gradient(115deg, #0F172A, #1E293B);
            max-width: 680px;
            margin: 0 auto;
            padding: 50px 36px;
            border-radius: var(--radius-3xl);
            border: 1px solid rgba(59, 130, 246, 0.3);
        }
        .cta-glow h2 {
            font-size: 1.8rem;
            margin-bottom: 14px;
        }
        .cta-glow p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        /* ── SEO长文区 ── */
        .seo-content {
            padding: 50px 0 60px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            color: #B0B7C3;
            font-size: 0.95rem;
            line-height: 1.85;
        }
        .seo-content h2 {
            font-size: 1.7rem;
            color: #E2E8F0;
            margin: 32px 0 16px;
            font-weight: 700;
        }
        .seo-content h3 {
            font-size: 1.25rem;
            color: #CBD5E1;
            margin: 24px 0 10px;
            font-weight: 600;
        }
        .seo-content p {
            margin-bottom: 14px;
        }
        .seo-content ul {
            margin: 10px 0 16px 20px;
            list-style-type: disc;
        }
        .seo-content ul li {
            margin-bottom: 6px;
        }

        /* ── Footer ── */
        footer {
            background: #020308;
            padding: 50px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.03);
            font-size: 0.85rem;
            color: #6B7280;
        }
        .footer-grid {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 36px;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            color: #CBD5E1;
            margin-bottom: 12px;
            font-size: 0.9rem;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: #6B7280;
            text-decoration: none;
            margin-bottom: 6px;
            transition: var(--transition-fast);
            font-size: 0.82rem;
        }
        .footer-col a:hover {
            color: var(--blue-400);
        }
        .footer-bottom {
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 20px;
            font-size: 0.78rem;
            color: #4B5563;
        }

        /* ── 响应式 ── */
        @media (max-width: 900px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero h1 {
                font-size: 2.4rem;
            }
            .nav-links {
                gap: 20px;
                margin-top: 10px;
                width: 100%;
                justify-content: center;
            }
            nav {
                flex-direction: column;
            }
            .capability-grid {
                grid-template-columns: 1fr;
            }
            .device-cards {
                grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
                gap: 12px;
            }
            .scene-cards {
                grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
                gap: 14px;
            }
            .timeline-step {
                flex: 1 1 130px;
                max-width: 160px;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .seo-content {
                font-size: 0.88rem;
            }
        }
        @media (max-width: 500px) {
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 1.9rem;
            }
            .btn-group {
                flex-direction: column;
                align-items: stretch;
                text-align: center;
            }
            .device-cards {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .scene-cards {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .timeline {
                flex-direction: column;
                align-items: center;
            }
            .timeline-step {
                max-width: 100%;
                flex: 1 1 auto;
                width: 100%;
            }
        }