:root {
            --bg-main: #060813;
            --bg-surface: #0e1329;
            --bg-card: rgba(18, 26, 52, 0.6);
            --bg-card-alt: rgba(14, 19, 41, 0.8);
            --border-color: rgba(99, 102, 241, 0.2);
            --border-hover: rgba(168, 85, 247, 0.5);
            --border-cyan: rgba(6, 182, 212, 0.35);
            --border-rose: rgba(244, 63, 94, 0.4);
            --primary: #6366f1;
            --secondary: #a855f7;
            --cyan: #06b6d4;
            --green: #10b981;
            --rose: #f43f5e;
            --amber: #f59e0b;
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
            --text-dim: #64748b;
            --glow-cyan: rgba(6, 182, 212, 0.25);
            --glow-rose: rgba(244, 63, 94, 0.2);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
        }

        body {
            background-color: var(--bg-main);
            color: var(--text-main);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        /* 极光背景 */
        .bg-aurora {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            z-index: -1;
            pointer-events: none;
            overflow: hidden;
        }
        .aurora-1 {
            position: absolute;
            top: -12%;
            right: 5%;
            width: 50vw;
            height: 50vw;
            background: radial-gradient(circle, rgba(244, 63, 94, 0.12) 0%, rgba(0, 0, 0, 0) 70%);
            filter: blur(115px);
            animation: auroraDrift1 19s ease-in-out infinite;
        }
        .aurora-2 {
            position: absolute;
            bottom: -10%;
            left: -5%;
            width: 45vw;
            height: 45vw;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.14) 0%, rgba(0, 0, 0, 0) 70%);
            filter: blur(120px);
            animation: auroraDrift2 21s ease-in-out infinite;
        }
        .aurora-3 {
            position: absolute;
            top: 35%;
            left: 40%;
            width: 40vw;
            height: 40vw;
            background: radial-gradient(circle, rgba(168, 85, 247, 0.1) 0%, rgba(0, 0, 0, 0) 70%);
            filter: blur(95px);
            animation: auroraDrift3 20s ease-in-out infinite;
        }
        @keyframes auroraDrift1 {
            0%,100%{transform: translate(0,0) scale(1);}
            33%{transform: translate(-3vw,2vw) scale(1.07);}
            66%{transform: translate(2vw,-1.5vw) scale(0.93);}
        }
        @keyframes auroraDrift2 {
            0%,100%{transform: translate(0,0) scale(1);}
            40%{transform: translate(3.5vw,-2.5vw) scale(1.1);}
            75%{transform: translate(-2vw,2vw) scale(0.91);}
        }
        @keyframes auroraDrift3 {
            0%,100%{transform: translate(0,0) scale(1);}
            50%{transform: translate(-2vw,-3vw) scale(1.06);}
        }

        /* 导航栏 */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(6, 8, 19, 0.82);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom: 1px solid var(--border-color);
        }
        .header-wrap {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0.9rem 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 0.7rem;
            text-decoration: none;
            color: #fff;
            flex-shrink: 0;
        }
        .brand-logo {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--cyan), var(--primary), var(--secondary));
            border-radius: 11px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 22px rgba(6, 182, 212, 0.45);
            transition: var(--transition-smooth);
        }
        .brand:hover .brand-logo {
            box-shadow: 0 0 32px rgba(6, 182, 212, 0.7);
            transform: scale(1.04);
        }
        .brand-title {
            font-size: 1.3rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #ffffff 40%, #bae6fd 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 1.6rem;
            flex-wrap: wrap;
        }
        .nav-link {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.93rem;
            font-weight: 500;
            transition: color var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--cyan);
            border-radius: 2px;
            transition: width var(--transition-smooth);
        }
        .nav-link:hover,
        .nav-link.active {
            color: var(--cyan);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }
        .nav-btn {
            background: linear-gradient(135deg, var(--cyan), var(--primary));
            color: #fff;
            padding: 0.6rem 1.4rem;
            border-radius: var(--radius-sm);
            text-decoration: none;
            font-size: 0.88rem;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(6, 182, 212, 0.3);
            transition: all var(--transition-smooth);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(6, 182, 212, 0.55);
            background: linear-gradient(135deg, #22d3ee, var(--primary));
        }

        /* 页面头部 */
        .page-header {
            text-align: center;
            max-width: 880px;
            margin: 4rem auto 2rem;
            padding: 0 1.5rem;
        }
        .page-header .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(244, 63, 94, 0.08);
            border: 1px solid rgba(244, 63, 94, 0.35);
            color: var(--rose);
            padding: 0.3rem 1rem;
            border-radius: 99px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
            animation: badgePulse 2.5s ease-in-out infinite;
        }
        @keyframes badgePulse {
            0%,100%{box-shadow: 0 0 0 0 rgba(244,63,94,0.3);}
            50%{box-shadow: 0 0 16px 3px rgba(244,63,94,0.12);}
        }
        .page-header h1 {
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
            letter-spacing: -0.5px;
        }
        .text-gradient {
            background: linear-gradient(135deg, #fff 20%, var(--rose) 50%, var(--amber) 90%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .text-gradient-cyan {
            background: linear-gradient(135deg, #fff 20%, var(--cyan) 60%, var(--secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-header p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 650px;
            margin: 0 auto;
        }

        /* 创意板块 1：智能解锁三部曲 */
        .steps-section {
            max-width: 1280px;
            margin: 3rem auto 4rem;
            padding: 0 2rem;
        }
        .steps-section h2 {
            text-align: center;
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 2.5rem;
            letter-spacing: -0.4px;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .step-card:hover {
            border-color: var(--border-rose);
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.45);
        }
        .step-number {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--rose);
            background: rgba(244,63,94,0.1);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            border: 1px solid rgba(244,63,94,0.3);
        }
        .step-card h3 {
            font-size: 1.2rem;
            color: #fff;
            margin-bottom: 0.8rem;
            font-weight: 700;
        }
        .step-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.65;
        }
        .step-icon {
            font-size: 2.2rem;
            margin-bottom: 1rem;
        }

        /* 平台网格 */
        .platform-grid-section {
            max-width: 1280px;
            margin: 4rem auto;
            padding: 0 2rem;
        }
        .platform-grid-section h2 {
            text-align: center;
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 2rem;
            letter-spacing: -0.4px;
        }
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 1rem;
        }
        .platform-tile {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 1.4rem 0.5rem;
            text-align: center;
            transition: all var(--transition-smooth);
            cursor: default;
        }
        .platform-tile:hover {
            border-color: var(--border-rose);
            transform: translateY(-4px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.4);
            background: rgba(24,32,60,0.7);
        }
        .platform-tile .p-icon { font-size: 2rem; margin-bottom: 0.6rem; }
        .platform-tile .p-name { font-size: 0.85rem; font-weight: 700; color: #fff; margin-bottom: 0.3rem; }
        .platform-tile .p-quality { font-size: 0.7rem; color: var(--text-muted); }
        .platform-tile .p-tag {
            display: inline-block; margin-top: 0.5rem; font-size: 0.7rem; font-weight: 700;
            color: var(--green); background: rgba(16,185,129,0.1); padding: 0.15rem 0.5rem; border-radius: 99px;
        }

        /* 创意板块 2：全球影视库漫游 */
        .world-cinema {
            max-width: 1280px;
            margin: 4rem auto;
            padding: 2.5rem;
            background: linear-gradient(135deg, rgba(6,182,212,0.05), rgba(244,63,94,0.04));
            border: 1px solid var(--border-rose);
            border-radius: var(--radius-xl);
            position: relative;
            overflow: hidden;
        }
        .world-cinema h2 {
            text-align: center;
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            letter-spacing: -0.4px;
        }
        .cinema-regions {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            margin-top: 2rem;
        }
        .region-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            transition: var(--transition-smooth);
        }
        .region-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-3px);
        }
        .region-flag {
            font-size: 2rem;
            margin-bottom: 0.6rem;
        }
        .region-card h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
        }
        .region-card p {
            color: var(--text-muted);
            font-size: 0.85rem;
            line-height: 1.6;
        }
        .region-card .highlight-text {
            color: var(--rose);
            font-weight: 600;
        }

        /* 创意板块 3：画质与带宽速查 */
        .quality-bandwidth {
            max-width: 1000px;
            margin: 4rem auto;
            padding: 0 2rem;
        }
        .quality-bandwidth h2 {
            text-align: center;
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 2rem;
            letter-spacing: -0.4px;
        }
        .qb-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.2rem;
        }
        .qb-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            text-align: center;
            transition: var(--transition-smooth);
        }
        .qb-card:hover {
            border-color: var(--border-cyan);
            transform: translateY(-3px);
        }
        .qb-card .qb-quality {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.5rem;
        }
        .qb-card .qb-speed {
            font-size: 0.9rem;
            color: var(--green);
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .qb-card .qb-note {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* 对比表格 */
        .tech-compare {
            max-width: 1000px;
            margin: 4rem auto;
            padding: 0 2rem;
        }
        .tech-compare h2 {
            text-align: center;
            font-size: 1.9rem;
            font-weight: 800;
            margin-bottom: 2rem;
            letter-spacing: -0.4px;
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }
        .compare-table th, .compare-table td {
            padding: 1rem 1.3rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        .compare-table th {
            background: rgba(255,255,255,0.025);
            color: var(--rose);
            font-weight: 700;
            font-size: 0.88rem;
        }
        .compare-table td { color: var(--text-muted); font-size: 0.9rem; }
        .compare-table .highlight { color: var(--green); font-weight: 700; }
        .compare-table .tag-new {
            display: inline-block; background: rgba(244,63,94,0.15); color: var(--rose);
            font-size: 0.7rem; padding: 0.15rem 0.5rem; border-radius: 99px; margin-left: 0.3rem; font-weight: 600;
        }

        /* CTA */
        .cta-banner {
            max-width: 1280px;
            margin: 0 auto 5rem;
            padding: 3.5rem 2rem;
            background: linear-gradient(135deg, rgba(244,63,94,0.08), rgba(99,102,241,0.1));
            border: 1px solid var(--border-hover);
            border-radius: var(--radius-xl);
            text-align: center;
        }
        .cta-banner h2 { font-size: 2.2rem; font-weight: 800; margin-bottom: 1rem; }
        .cta-banner p { color: var(--text-muted); margin-bottom: 2rem; max-width: 500px; margin-left: auto; margin-right: auto; }
        .btn-lg {
            padding: 0.95rem 2rem; border-radius: var(--radius-md); font-size: 0.98rem; font-weight: 700;
            text-decoration: none; display: inline-flex; align-items: center; gap: 0.5rem; transition: all var(--transition-smooth);
        }
        .btn-main {
            background: linear-gradient(135deg, var(--rose), var(--amber)); color: #fff;
            box-shadow: 0 10px 28px rgba(244,63,94,0.35);
        }
        .btn-main:hover { transform: translateY(-3px); box-shadow: 0 16px 36px rgba(244,63,94,0.55); }

        /* Footer */
        footer {
            background: #03040a;
            border-top: 1px solid var(--border-color);
            padding: 4rem 2rem 2rem;
        }
        .footer-grid {
            max-width: 1280px; margin: 0 auto; display: grid;
            grid-template-columns: 2fr repeat(3, 1fr); gap: 3rem; margin-bottom: 3rem;
        }
        .footer-brand p { color: var(--text-muted); font-size: 0.88rem; margin-top: 1rem; max-width: 300px; line-height: 1.6; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 1.1rem; font-weight: 700; }
        .footer-col ul { list-style: none; }
        .footer-col li { margin-bottom: 0.7rem; }
        .footer-col a { color: var(--text-muted); text-decoration: none; font-size: 0.88rem; transition: color var(--transition-fast); }
        .footer-col a:hover { color: #fff; }
        .footer-bottom {
            max-width: 1280px; margin: 0 auto; padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.04); display: flex; justify-content: space-between;
            color: var(--text-muted); font-size: 0.82rem; flex-wrap: wrap; gap: 1rem;
        }

        /* 响应式 */
        @media (max-width: 1100px) {
            .steps-grid { grid-template-columns: 1fr; }
            .platform-grid { grid-template-columns: repeat(3,1fr); }
            .cinema-regions { grid-template-columns: 1fr; }
            .qb-grid { grid-template-columns: repeat(2,1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .platform-grid { grid-template-columns: repeat(2,1fr); }
            .footer-grid { grid-template-columns: 1fr; }
            .page-header h1 { font-size: 2rem; }
            .compare-table th, .compare-table td { padding: 0.7rem 0.5rem; font-size: 0.75rem; }
        }
        @media (max-width: 480px) {
            .qb-grid { grid-template-columns: 1fr; }
        }