/* 重置和变量 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
        }
        
        :root {
            --primary: #0066ff;
            --primary-dark: #0052cc;
            --secondary: #00c48c;
            --text: #1a1f36;
            --text-light: #5b6e8c;
            --bg-light: #f7f9fc;
            --border: #e6eaf0;
            --shadow: 0 4px 12px rgba(0,0,0,0.05);
            --shadow-hover: 0 8px 24px rgba(0,102,255,0.15);
        }
        
        body {
            color: var(--text);
            line-height: 1.5;
            background: white;
            overflow-x: hidden;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }
        
        /* 导航栏 - 移动端优化 */
        .navbar {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid var(--border);
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
            position: relative;
        }
        
        .logo {
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        
        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: white;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: bold;
            flex-shrink: 0;
        }
        
        .logo-text {
            font-size: clamp(1.2rem, 4vw, 1.5rem);
            font-weight: 600;
            color: var(--text);
            margin-left: 8px;
            white-space: nowrap;
        }
        
        .logo-sub {
            font-size: clamp(0.75rem, 2.5vw, 1rem);
            color: var(--text-light);
            margin-left: 4px;
        }
        
        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            width: 44px;
            height: 44px;
            position: relative;
            cursor: pointer;
            padding: 10px;
        }
        
        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text);
            margin: 5px 0;
            transition: 0.3s;
            border-radius: 4px;
        }
        
        .nav-menu {
            display: flex;
            gap: clamp(16px, 2vw, 32px);
            align-items: center;
        }
        
        .nav-link {
            text-decoration: none;
            color: var(--text);
            font-size: clamp(0.875rem, 2vw, 1rem);
            white-space: nowrap;
        }
        
        /* 移动端导航响应式 */
        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: white;
                flex-direction: column;
                padding: 20px;
                gap: 16px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                border-bottom: 1px solid var(--border);
                z-index: 999;
            }
            
            .nav-menu.active {
                display: flex;
            }
            
            .nav-link {
                width: 100%;
                text-align: center;
                padding: 12px;
                border-radius: 8px;
            }
            
            .nav-link:hover {
                background: var(--bg-light);
            }
            
            .nav-menu .btn-primary {
                width: 100%;
                text-align: center;
                padding: 12px !important;
            }
        }
        
        /* Hero区域 - 完全自适应 */
        .hero {
            padding: clamp(80px, 15vw, 120px) 0 clamp(40px, 8vw, 80px);
            background: linear-gradient(135deg, #f5f9ff 0%, #ffffff 100%);
            position: relative;
            overflow: hidden;
        }
        
        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            width: 100%;
        }
        
        .hero-title {
            font-size: clamp(1.8rem, 6vw, 3.5rem);
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--text);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        
        .hero-title-main {
            display: block;
        }
        
        .hero-title-sub {
            font-size: 0.7em;
            color: var(--text-light);
            font-weight: 400;
        }
        
        .hero-title-highlight {
            color: var(--primary);
            font-size: 0.8em;
            background: linear-gradient(120deg, rgba(0,102,255,0.1) 0%, rgba(0,102,255,0) 100%);
            padding: 4px 16px;
            border-radius: 40px;
            display: inline-block;
            width: fit-content;
            margin-top: 8px;
        }
        
        .hero-subtitle {
            font-size: clamp(1rem, 3.5vw, 1.25rem);
            color: var(--text-light);
            margin-bottom: 32px;
            line-height: 1.6;
        }
        
        .badge-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 32px;
        }
        
        .badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(0,102,255,0.08);
            border-radius: 40px;
            font-size: clamp(0.75rem, 2.5vw, 0.875rem);
            color: var(--primary);
            border: 1px solid rgba(0,102,255,0.1);
            backdrop-filter: blur(4px);
            transition: all 0.2s;
        }
        
        .cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 48px;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: clamp(12px, 3vw, 16px) clamp(24px, 5vw, 40px);
            border-radius: 40px;
            font-weight: 500;
            text-decoration: none;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
            font-size: clamp(1rem, 3vw, 1.125rem);
            white-space: nowrap;
        }
        
        .btn-primary {
            background: var(--primary);
            color: white;
            box-shadow: 0 8px 20px rgba(0,102,255,0.3);
        }
        
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(0,102,255,0.4);
        }
        
        .btn-outline {
            background: transparent;
            color: var(--text);
            border: 2px solid var(--border);
        }
        
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: clamp(10px, 3vw, 20px);
            margin-top: 20px;
            padding: 24px 0;
            border-top: 1px solid var(--border);
        }
        
        .stat-item {
            text-align: center;
        }
        
        .stat-number {
            font-size: clamp(1.2rem, 4vw, 2rem);
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 4px;
            line-height: 1.2;
        }
        
        .stat-label {
            font-size: clamp(0.7rem, 2.5vw, 0.875rem);
            color: var(--text-light);
        }
        
        /* 通用区块样式 */
        .section {
            padding: clamp(40px, 10vw, 80px) 0;
        }
        
        .section-title {
            font-size: clamp(1.5rem, 5vw, 2rem);
            font-weight: 700;
            margin-bottom: 16px;
            text-align: center;
        }
        
        .section-subtitle {
            font-size: clamp(0.875rem, 3vw, 1.125rem);
            color: var(--text-light);
            text-align: center;
            max-width: 700px;
            margin: 0 auto 48px;
            padding: 0 20px;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
            gap: 30px;
            margin-top: 40px;
            padding: 0 20px;
        }
        
        .feature-card {
            padding: clamp(20px, 5vw, 32px);
            background: white;
            border-radius: 24px;
            box-shadow: var(--shadow);
            transition: transform 0.2s;
            height: 100%;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }
        
        /* 支付方式展示 */
        .payment-grid {
            display: flex;
            justify-content: center;
            gap: clamp(20px, 5vw, 48px);
            flex-wrap: wrap;
            align-items: center;
            padding: 0 20px;
        }
        
        .payment-item {
            text-align: center;
            min-width: 120px;
        }
        
        .payment-icon {
            font-size: clamp(1.5rem, 5vw, 2rem);
            margin-bottom: 8px;
        }
        
        /* 价格卡片 */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
            gap: 30px;
            max-width: 1000px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .pricing-card {
            background: white;
            border-radius: 24px;
            padding: clamp(20px, 5vw, 32px);
            box-shadow: var(--shadow);
            transition: all 0.3s;
        }
        
        .pricing-card.featured {
            box-shadow: 0 8px 24px rgba(0,102,255,0.15);
            border: 2px solid var(--primary);
            transform: scale(1.05);
            z-index: 2;
        }
        
        @media (max-width: 768px) {
            .pricing-card.featured {
                transform: scale(1);
            }
            
            .pricing-grid {
                gap: 20px;
            }
        }
        
        .pricing-badge {
            background: var(--primary);
            color: white;
            display: inline-block;
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.875rem;
            margin-bottom: 16px;
        }
        
        .pricing-price {
            font-size: clamp(2rem, 6vw, 2.5rem);
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        
        /* 费率对比 */
        .rate-comparison {
            max-width: 800px;
            margin: 48px auto 0;
            padding: clamp(20px, 5vw, 32px);
            background: white;
            border-radius: 24px;
            box-shadow: var(--shadow);
        }
        
        .rate-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        
        @media (max-width: 640px) {
            .rate-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }
        
        /* 代码示例 */
        .code-block {
            background: #1a1f36;
            color: #fff;
            padding: 20px;
            border-radius: 12px;
            overflow-x: auto;
            font-size: clamp(0.75rem, 2.5vw, 0.875rem);
            white-space: pre-wrap;
            word-break: break-word;
        }
        
        /* FAQ */
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .faq-item {
            margin-bottom: 16px;
            padding: 20px;
            background: white;
            border-radius: 16px;
            box-shadow: var(--shadow);
        }
        
        .faq-question {
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            font-size: clamp(1rem, 3.5vw, 1.125rem);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .faq-question::-webkit-details-marker {
            display: none;
        }
        
        .faq-question::after {
            content: '▼';
            font-size: 0.8em;
            transition: transform 0.3s;
        }
        
        details[open] .faq-question::after {
            transform: rotate(180deg);
        }
        
        .faq-answer {
            margin-top: 16px;
            color: var(--text-light);
        }
        
        /* 底部CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            text-align: center;
            padding: clamp(40px, 10vw, 80px) 0;
        }
        
        .cta-title {
            font-size: clamp(1.8rem, 6vw, 2.5rem);
            margin-bottom: 20px;
            color: white;
        }
        
        .cta-subtitle {
            font-size: clamp(1rem, 3.5vw, 1.25rem);
            margin-bottom: 40px;
            opacity: 0.9;
        }
        
        .cta-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }
        
        .cta-btn-white {
            background: white;
            color: var(--primary);
            font-size: 1.125rem;
            padding: 16px 48px;
            border-radius: 40px;
            text-decoration: none;
            font-weight: 500;
        }
        
        .cta-btn-outline-white {
            border: 2px solid white;
            color: white;
            font-size: 1.125rem;
            padding: 16px 48px;
            border-radius: 40px;
            text-decoration: none;
            font-weight: 500;
        }
        
        /* 页脚 */
        .footer {
            background: #1a1f36;
            color: white;
            padding: clamp(40px, 8vw, 60px) 0 30px;
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        
        @media (max-width: 768px) {
            .footer-grid {
                gap: 30px;
            }
        }
        
        .footer-links {
            list-style: none;
            opacity: 0.7;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 30px;
            text-align: center;
            opacity: 0.6;
            font-size: 0.875rem;
        }
        
        .keyword-tags {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }
        
        /* 回到顶部按钮 */
        #backToTop {
            position: fixed;
            bottom: clamp(20px, 5vw, 30px);
            right: clamp(20px, 5vw, 30px);
            width: clamp(44px, 10vw, 50px);
            height: clamp(44px, 10vw, 50px);
            border-radius: 50%;
            background: var(--primary);
            color: white;
            border: none;
            cursor: pointer;
            display: none;
            z-index: 999;
            box-shadow: 0 4px 12px rgba(0,102,255,0.3);
            font-size: 1.25rem;
            transition: all 0.3s;
        }
        
        #backToTop:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0,102,255,0.4);
        }
        
        /* 移动端优化 */
        @media (max-width: 480px) {
            .badge-grid {
                justify-content: center;
            }
            
            .cta-group {
                flex-direction: column;
            }
            
            .btn {
                width: 100%;
            }
            
            .stats-grid {
                gap: 10px;
            }
            
            .feature-card ul {
                padding-left: 0;
            }
        }