/* 基础重置与变量定义 */
        :root {
            --primary: #00c6ff;
            --primary-dark: #0084ff;
            --bg-dark: #0f172a;
            --bg-darker: #0b1120;
            --text-light: #f8fafc;
            --text-gray: #94a3b8;
            --card-bg: #1e293b;
            --success: #10b981;
            --warning: #f59e0b;
            --border-radius: 12px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background-color: var(--bg-dark);
            color: var(--text-light);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        
        /* 排版工具类 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        
        .section {
            padding: 5rem 0;
        }
        
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        
        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 1rem;
            background: linear-gradient(to right, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .section-subtitle {
            color: var(--text-gray);
            font-size: 1.125rem;
            max-width: 600px;
            margin: 0 auto;
        }
        
        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.5rem;
            border-radius: var(--border-radius);
            font-weight: 600;
            text-align: center;
            white-space: nowrap;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            outline: none;
        }
        
        .btn-primary {
            background: linear-gradient(to right, var(--primary), var(--primary-dark));
            color: white;
            box-shadow: 0 4px 15px rgba(0, 198, 255, 0.3);
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 198, 255, 0.4);
        }
        
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        
        .btn-outline:hover {
            background: rgba(0, 198, 255, 0.1);
        }
        
        .btn-lg {
            padding: 1rem 2rem;
            font-size: 1.125rem;
        }
        
        /* 导航栏 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            padding: 1rem 0;
            background-color: rgba(15, 23, 42, 0.8);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .logo-icon {
            width: 24px;
            height: 24px;
            background: linear-gradient(to right, var(--primary), var(--primary-dark));
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 0.875rem;
        }
        
        .nav-links {
            display: flex;
            gap: 2rem;
        }
        
        .nav-link {
            color: var(--text-gray);
            font-weight: 500;
            transition: var(--transition);
        }
        
        .nav-link:hover {
            color: var(--primary);
        }
        
        .nav-actions {
            display: flex;
            gap: 1rem;
        }
        
        /* 英雄区域 */
        .hero {
            padding: 10rem 0 6rem;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at center, rgba(0, 198, 255, 0.1) 0%, transparent 70%);
            z-index: -1;
        }
        
        .hero-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 1.5rem;
            background: linear-gradient(to right, #fff, var(--text-gray));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .hero-subtitle {
            color: var(--text-gray);
            font-size: 1.25rem;
            margin-bottom: 2.5rem;
            max-width: 600px;
        }
        
        .hero-actions {
            display: flex;
            gap: 1rem;
            margin-bottom: 3rem;
        }
        
        .hero-stats {
            display: flex;
            gap: 2rem;
            margin-top: 2rem;
        }
        
        .stat-item {
            text-align: center;
        }
        
        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.25rem;
        }
        
        .stat-label {
            color: var(--text-gray);
            font-size: 0.875rem;
        }
        
        /* 平台卡片 */
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }
        
        .platform-card {
            background: var(--card-bg);
            border-radius: var(--border-radius);
            padding: 2rem;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.05);
        }
        
        .platform-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
            border-color: rgba(0, 198, 255, 0.3);
        }
        
        .platform-icon {
            width: 60px;
            height: 60px;
            background: rgba(0, 198, 255, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
            color: var(--primary);
        }
        
        .platform-name {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        
        .platform-desc {
            color: var(--text-gray);
            margin-bottom: 1.5rem;
            font-size: 0.875rem;
        }
        
        /* 特性部分 */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
        }
        
        .feature-card {
            background: var(--card-bg);
            border-radius: var(--border-radius);
            padding: 2rem;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.05);
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
        }
        
        .feature-icon {
            width: 48px;
            height: 48px;
            background: rgba(0, 198, 255, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: var(--primary);
            font-size: 1.25rem;
        }
        
        .feature-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        
        .feature-desc {
            color: var(--text-gray);
            line-height: 1.7;
        }
        
        /* 推荐部分 */
        .referral-section {
            background: linear-gradient(135deg, var(--bg-darker), var(--bg-dark));
            border-radius: var(--border-radius);
            padding: 4rem;
            text-align: center;
            margin: 3rem 0;
        }
        
        .referral-steps {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin: 3rem 0;
            flex-wrap: wrap;
        }
        
        .step-card {
            background: var(--card-bg);
            border-radius: var(--border-radius);
            padding: 2rem;
            width: 280px;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.05);
        }
        
        .step-number {
            position: absolute;
            top: 0;
            right: 1.5rem;
            font-size: 5rem;
            font-weight: 800;
            color: rgba(0, 198, 255, 0.05);
            line-height: 1;
        }
        
        .step-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary);
        }
        
        .step-desc {
            color: var(--text-gray);
            font-size: 0.875rem;
        }
        
        /* 页脚 */
        .footer {
            background: var(--bg-darker);
            padding: 4rem 0 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }
        
        .footer-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 1rem;
            display: inline-block;
        }
        
        .footer-about {
            color: var(--text-gray);
            margin-bottom: 1.5rem;
            font-size: 0.875rem;
            line-height: 1.7;
        }
        
        .footer-title {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            color: white;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-link {
            margin-bottom: 0.75rem;
        }
        
        .footer-link a {
            color: var(--text-gray);
            font-size: 0.875rem;
            transition: var(--transition);
        }
        
        .footer-link a:hover {
            color: var(--primary);
        }
        
        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 1.5rem;
        }
        
        .social-link {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--card-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-gray);
            transition: var(--transition);
        }
        
        .social-link:hover {
            background: var(--primary);
            color: white;
        }
        
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
        }
        
        .copyright {
            color: var(--text-gray);
            font-size: 0.875rem;
        }
        
        .footer-legal {
            display: flex;
            gap: 1.5rem;
        }
        
        .footer-legal a {
            color: var(--text-gray);
            font-size: 0.875rem;
            transition: var(--transition);
        }
        
        .footer-legal a:hover {
            color: var(--primary);
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .section {
                padding: 3rem 0;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .hero-title {
                font-size: 2.5rem;
            }
            
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            
            .hero-actions .btn {
                width: 100%;
            }
            
            .hero-stats {
                flex-direction: column;
                gap: 1rem;
            }
            
            .nav-links {
                display: none;
            }
            
            .referral-section {
                padding: 2rem 1.5rem;
            }
            
            .step-card {
                width: 100%;
            }
        }