:root {
            --primary-color: #f0b90b;
            --dark-bg: #1e2026;
            --light-bg: #f5f5f5;
            --text-dark: #333;
            --text-light: #fff;
            --card-bg: #fff;
            --border-radius: 8px;
            --box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Arial', sans-serif;
        }
        
        body {
            background-color: var(--light-bg);
            color: var(--text-dark);
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部样式 */
        header {
            background-color: var(--dark-bg);
            color: var(--text-light);
            padding: 20px 0;
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-size: 24px;
            font-weight: bold;
            color: var(--primary-color);
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 30px;
        }
        
        nav ul li a {
            color: var(--text-light);
            text-decoration: none;
            transition: color 0.3s;
            font-weight: 500;
        }
        
        nav ul li a:hover {
            color: var(--primary-color);
        }
        
        .auth-buttons .btn {
            margin-left: 15px;
        }
        
        /* 按钮样式 */
        .btn {
            display: inline-block;
            background-color: var(--primary-color);
            color: var(--dark-bg);
            padding: 10px 25px;
            border-radius: var(--border-radius);
            text-decoration: none;
            font-weight: bold;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
        }
        
        .btn:hover {
            background-color: #f8d33a;
            transform: translateY(-2px);
        }
        
        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
        }
        
        .btn-outline:hover {
            background-color: var(--primary-color);
            color: var(--dark-bg);
        }
        
        /* 主要内容区域 */
        .hero {
            background-color: var(--dark-bg);
            color: var(--text-light);
            padding: 100px 0;
            text-align: center;
        }
        
        .hero h1 {
            font-size: 48px;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .hero p {
            font-size: 20px;
            max-width: 800px;
            margin: 0 auto 40px;
            opacity: 0.9;
        }
        
        /* 分区样式 */
        .section {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
            font-size: 36px;
            position: relative;
        }
        
        .section-title:after {
            content: '';
            display: block;
            width: 80px;
            height: 4px;
            background-color: var(--primary-color);
            margin: 20px auto 0;
        }
        
        .section-subtitle {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 60px;
            font-size: 18px;
            color: #666;
        }
        
        /* 卡片布局 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .card {
            background-color: var(--card-bg);
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            transition: transform 0.3s;
        }
        
        .card:hover {
            transform: translateY(-10px);
        }
        
        .card-icon {
            font-size: 40px;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        
        .card-title {
            font-size: 22px;
            margin-bottom: 15px;
        }
        
        /* 特色服务区 */
        .features {
            background-color: #f9f9f9;
        }
        
        /* 交易对列表 */
        .market-table {
            width: 100%;
            border-collapse: collapse;
            background-color: var(--card-bg);
            box-shadow: var(--box-shadow);
            border-radius: var(--border-radius);
            overflow: hidden;
        }
        
        .market-table thead {
            background-color: var(--dark-bg);
            color: var(--text-light);
        }
        
        .market-table th, .market-table td {
            padding: 15px;
            text-align: left;
        }
        
        .market-table th {
            font-weight: 500;
        }
        
        .market-table tbody tr {
            border-bottom: 1px solid #eee;
        }
        
        .market-table tbody tr:last-child {
            border-bottom: none;
        }
        
        .market-table tbody tr:hover {
            background-color: #f8f8f8;
        }
        
        .price-up {
            color: #0ecb81;
        }
        
        .price-down {
            color: #f6465d;
        }
        
        /* 安全认证区 */
        .security-badges {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 30px;
            margin-top: 40px;
        }
        
        .badge {
            background-color: var(--card-bg);
            padding: 20px;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            text-align: center;
            min-width: 200px;
        }
        
        .badge-icon {
            font-size: 36px;
            margin-bottom: 15px;
            color: var(--primary-color);
        }
        
        /* 常见问题 */
        .faq-item {
            background-color: var(--card-bg);
            margin-bottom: 15px;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
        }
        
        .faq-question {
            padding: 20px;
            background-color: var(--primary-color);
            color: var(--dark-bg);
            font-weight: bold;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .faq-answer {
            padding: 20px;
            display: none;
        }
        
        .faq-answer.active {
            display: block;
        }
        
        /* 页脚样式 */
        footer {
            background-color: var(--dark-bg);
            color: var(--text-light);
            padding: 60px 0 20px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-column h3 {
            color: var(--primary-color);
            margin-bottom: 25px;
            font-size: 18px;
        }
        
        .footer-column ul {
            list-style: none;
        }
        
        .footer-column ul li {
            margin-bottom: 12px;
        }
        
        .footer-column ul li a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-column ul li a:hover {
            color: var(--primary-color);
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-links a {
            color: #ccc;
            font-size: 20px;
            transition: color 0.3s;
        }
        
        .social-links a:hover {
            color: var(--primary-color);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #333;
            color: #999;
            font-size: 14px;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
            }
            
            nav ul {
                margin-top: 20px;
            }
            
            nav ul li {
                margin-left: 15px;
                margin-right: 15px;
            }
            
            .hero h1 {
                font-size: 36px;
            }
            
            .hero p {
                font-size: 18px;
            }
            
            .section {
                padding: 60px 0;
            }
        }
        
        @media (max-width: 576px) {
            .footer-content {
                grid-template-columns: 1fr;
            }
            
            .card-grid {
                grid-template-columns: 1fr;
            }
            
            .auth-buttons {
                display: flex;
                flex-direction: column;
                gap: 10px;
                width: 100%;
            }
            
            .auth-buttons .btn {
                margin-left: 0;
                width: 100%;
                text-align: center;
            }
        }