* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        :root {
            --primary: #165DFF;
            --dark: #0F172A;
            --light: #f8fafc;
            --gradient: linear-gradient(135deg, #165DFF, #4892FF);
            --card: rgba(255,255,255,0.04);
            --radius: 18px;
            --border: rgba(255,255,255,0.08);
        }

        body {
            background: var(--dark);
            color: var(--light);
            overflow-x: hidden;
            line-height: 1.6;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 瀵艰埅 */
        header {
            background: rgba(15,23,42,0.85);
            backdrop-filter: blur(15px);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 999;
            padding: 18px 0;
            border-bottom: 1px solid var(--border);
        }

        .nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 26px;
            font-weight: bold;
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .btn {
            display: inline-block;
            background: var(--gradient);
            color: #fff;
            padding: 14px 32px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 500;
            transition: 0.3s ease;
            border: none;
            cursor: pointer;
            font-size: 15px;
        }

        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(22,93,255,0.35);
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
        }

        /* 棣栧睆 */
        .hero {
            margin-top: 80px;
            padding: 100px 0 80px;
            text-align: center;
            position: relative;
        }

        .hero h1 {
            font-size: 48px;
            margin-bottom: 20px;
            line-height: 1.2;
            max-width: 900px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero p {
            font-size: 19px;
            color: #94a3b8;
            max-width: 750px;
            margin: 0 auto 35px;
        }

        .hero-btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* 妯″潡鏍囬 */
        .section-title {
            text-align: center;
            font-size: 34px;
            margin: 70px 0 45px;
            position: relative;
            font-weight: 600;
        }

        .section-title::after {
            content: '';
            width: 70px;
            height: 4px;
            background: var(--gradient);
            position: absolute;
            bottom: -14px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }

        .section-desc {
            text-align: center;
            color: #94a3b8;
            max-width: 700px;
            margin: -30px auto 40px;
            font-size: 17px;
        }

        /* 骞冲彴鏀寔 */
        .platform {
            padding: 50px 0;
            text-align: center;
            background: rgba(255,255,255,0.02);
            border-radius: var(--radius);
            margin: 30px 0;
        }

        .platform h3 {
            margin-bottom: 25px;
            font-size: 22px;
        }

        .platform-list {
            display: flex;
            justify-content: center;
            gap: 35px;
            flex-wrap: wrap;
            font-size: 20px;
            font-weight: bold;
            color: #cbd5e1;
        }

        /* 鏍稿績浼樺娍 */
        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 26px;
            margin-bottom: 50px;
        }

        .card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 35px 28px;
            transition: 0.3s ease;
        }

        .card:hover {
            transform: translateY(-8px);
            border-color: var(--primary);
            box-shadow: 0 15px 35px rgba(0,0,0,0.25);
        }

        .card h4 {
            font-size: 21px;
            margin-bottom: 14px;
            color: #fff;
        }

        .card p {
            color: #94a3b8;
            line-height: 1.7;
        }

        /* 鍗栫偣 */
        .advantage {
            background: rgba(22,93,255,0.05);
            padding: 60px 0;
            margin: 40px 0;
        }

        .advantage-item {
            display: flex;
            align-items: center;
            gap: 15px;
            background: var(--card);
            padding: 18px 24px;
            border-radius: 12px;
            margin-bottom: 16px;
            border: 1px solid var(--border);
        }

        .advantage-item strong {
            color: #fff;
            font-size: 17px;
        }

        /* 浠锋牸濂楅 */
        .price-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 40px 30px;
            text-align: center;
            position: relative;
            transition: 0.3s;
        }

        .price-card.hot {
            border-color: var(--primary);
            transform: scale(1.03);
        }

        .price-card h3 {
            font-size: 24px;
            margin-bottom: 15px;
        }

        .price {
            font-size: 36px;
            color: #fff;
            margin: 20px 0;
            font-weight: bold;
        }

        .price span {
            font-size: 16px;
            color: #94a3b8;
            font-weight: normal;
        }

        .price-feature {
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            color: #cbd5e1;
        }

        /* 瀹㈡埛璇勪环 */
        .review {
            background: var(--card);
            border-radius: var(--radius);
            padding: 30px;
            border: 1px solid var(--border);
        }

        .review-text {
            color: #cbd5e1;
            margin-bottom: 15px;
            font-style: italic;
        }

        .review-name {
            color: #fff;
            font-weight: bold;
        }

        /* 閫傜敤浜虹兢 */
        .user-list {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 18px;
            margin-bottom: 60px;
        }

        .user-item {
            background: var(--card);
            padding: 14px 28px;
            border-radius: 50px;
            border: 1px solid var(--border);
            font-size: 16px;
        }

        /* 淇濋殰 */
        .security {
            text-align: center;
            padding: 50px 0;
            background: rgba(255,255,255,0.02);
            border-radius: var(--radius);
            margin: 40px 0;
        }

        .security-grid {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 30px;
            margin-top: 30px;
        }

        .security-item {
            width: 200px;
        }

        /* 搴曢儴鍜ㄨ */
        .contact {
            background: var(--gradient);
            padding: 60px 0;
            text-align: center;
            color: #fff;
            border-radius: var(--radius);
            margin: 50px 0;
        }

        .contact h2 {
            font-size: 32px;
            margin-bottom: 15px;
        }

        .contact p {
            font-size: 18px;
            margin-bottom: 30px;
            opacity: 0.95;
        }

        /* 搴曢儴 */
        footer {
            padding: 45px 0;
            text-align: center;
            border-top: 1px solid var(--border);
            margin-top: 30px;
        }

        footer p {
            color: #64748b;
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 30px;
            }
            .section-title {
                font-size: 26px;
            }
            .grid {
                grid-template-columns: 1fr;
            }
            .price-card.hot {
                transform: scale(1);
            }
        }


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