:root {
            --primary-color: #0066ff;
            --dark-bg: #0f172a;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            line-height: 1.6;
            color: #333;
        }
        
        /* 顶部导航 */
        .top-nav {
            background: rgba(15, 23, 42, 0.95);
            position: fixed;
            width: 100%;
            z-index: 999;
            backdrop-filter: blur(10px);
        }
        .nav-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }
        .brand-logo {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            text-decoration: none;
        }
        .nav-links {
            display: flex;
            gap: 35px;
        }
        .nav-links a {
            color: #fff;
            text-decoration: none;
            font-weight: 500;
        }
        
        /* Hero Banner */
        .hero-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
            color: white;
            padding: 160px 20px 100px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('https://shanlianpvn.com.cn/banner.png') center/cover no-repeat;
            opacity: 0.25;
        }
        .hero-content {
            max-width: 860px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }
        .hero-title {
            font-size: 52px;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .hero-subtitle {
            font-size: 24px;
            margin-bottom: 40px;
            opacity: 0.9;
        }
        .download-btn {
            background: var(--primary-color);
            color: white;
            padding: 16px 48px;
            font-size: 20px;
            border: none;
            border-radius: 50px;
            cursor: pointer;
            box-shadow: 0 10px 30px rgba(0, 102, 255, 0.4);
            transition: all 0.3s;
        }
        .download-btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(0, 102, 255, 0.5);
        }
        
        /* 通用容器 */
        .section-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 80px 20px;
        }
        
        /* 特点介绍 */
        .features-wrap {
            background: #f8fafc;
        }
        .section-title {
            text-align: center;
            font-size: 42px;
            margin-bottom: 60px;
            color: #0f172a;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }
        .feature-card {
            background: white;
            border-radius: 16px;
            padding: 40px 30px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            text-align: center;
            transition: transform 0.3s;
        }
        .feature-card:hover {
            transform: translateY(-12px);
        }
        .feature-icon {
            width: 90px;
            height: 90px;
            background: #eff6ff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            font-size: 42px;
        }
        
        /* 优势区域 */
        .advantages-wrap {
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
        }
        .adv-list {
            display: flex;
            flex-direction: column;
            gap: 50px;
        }
        .adv-item {
            display: flex;
            align-items: center;
            gap: 60px;
        }
        .adv-item.reverse {
            flex-direction: row-reverse;
        }
        .adv-text {
            flex: 1;
        }
        .adv-image {
            flex: 1;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0,0,0,0.15);
        }
        .adv-image img {
            width: 100%;
            display: block;
        }
        
        /* 用户评价 */
        .reviews-wrap {
            background: #fff;
        }
        .review-slider {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
            gap: 30px;
        }
        .review-card {
            background: #f8fafc;
            padding: 35px;
            border-radius: 16px;
            border-left: 5px solid var(--primary-color);
        }
        
        /* 常见问题 */
        .faq-wrap {
            background: #f8fafc;
        }
        .faq-item {
            background: white;
            margin-bottom: 15px;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .faq-question {
            padding: 22px 30px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        /* 套餐介绍 */
        .pricing-wrap {
            background: #0f172a;
            color: white;
        }
        .price-cards {
            display: flex;
            justify-content: center;
            gap: 30px;
            flex-wrap: wrap;
        }
        .price-card {
            background: #1e2937;
            border-radius: 20px;
            width: 340px;
            padding: 40px 30px;
            text-align: center;
            transition: all 0.4s;
        }
        .price-card.popular {
            transform: scale(1.08);
            border: 3px solid #60a5fa;
        }
        
        /* 操作方案 */
        .guide-wrap {
            background: #f8fafc;
        }
        .step-timeline {
            max-width: 900px;
            margin: 0 auto;
        }
        .step-item {
            display: flex;
            gap: 30px;
            margin-bottom: 60px;
        }
        .step-number {
            width: 60px;
            height: 60px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            flex-shrink: 0;
        }
        
        /* 底部 Footer */
        .enterprise-footer {
            background: #0a0f1c;
            color: #94a3b8;
            padding: 80px 20px 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 50px;
            max-width: 1280px;
            margin: 0 auto 60px;
        }
        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 30px;
            text-align: center;
            font-size: 14px;
        }