* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部样式 */
        header {
            background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
            color: white;
            padding: 20px 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .logo i {
            font-size: 32px;
            color: #4fc3f7;
        }
        
        .logo h1 {
            font-size: 24px;
            font-weight: 700;
        }
        
        .logo span {
            color: #4fc3f7;
        }
        
        nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        
        nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            transition: color 0.3s;
        }
        
        nav a:hover {
            color: #4fc3f7;
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
        }
        
        /* 英雄区域 */
        .hero {
            padding: 80px 0;
            background: linear-gradient(to right, #f8f9fa 60%, #e3f2fd 100%);
        }
        
        .hero-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        
        .hero-text {
            flex: 1;
            min-width: 300px;
            padding-right: 40px;
        }
        
        .hero-text h2 {
            font-size: 42px;
            margin-bottom: 20px;
            color: #1a237e;
            line-height: 1.2;
        }
        
        .hero-text p {
            font-size: 18px;
            margin-bottom: 30px;
            color: #555;
        }
        
        .hero-image {
            flex: 1;
            min-width: 300px;
            text-align: center;
        }
        
        .hero-image img {
            max-width: 100%;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
        }
        
        /* 下载按钮样式 */
        .download-buttons {
            display: flex;
            gap: 20px;
            margin-top: 30px;
            flex-wrap: wrap;
        }
        
        .download-btn {
            display: flex;
            align-items: center;
            padding: 15px 25px;
            background-color: #1a237e;
            color: white;
            border-radius: 10px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
            box-shadow: 0 4px 12px rgba(26, 35, 126, 0.2);
        }
        
        .download-btn:hover {
            background-color: #283593;
            transform: translateY(-3px);
            box-shadow: 0 6px 16px rgba(26, 35, 126, 0.3);
        }
        
        .download-btn i {
            font-size: 28px;
            margin-right: 15px;
        }
        
        .download-btn.android {
            background-color: #3ddc84;
            color: #333;
        }
        
        .download-btn.android:hover {
            background-color: #2bc56c;
        }
        
        .download-btn.ios {
            background-color: #000;
            color: white;
        }
        
        .download-btn.ios:hover {
            background-color: #333;
        }
        
        /* 功能特色区域 */
        .features {
            padding: 80px 0;
            background-color: white;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 36px;
            color: #1a237e;
            margin-bottom: 15px;
        }
        
        .section-title p {
            color: #666;
            font-size: 18px;
            max-width: 700px;
            margin: 0 auto;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 40px;
        }
        
        .feature-card {
            background: #f8f9fa;
            border-radius: 15px;
            padding: 30px;
            text-align: center;
            transition: transform 0.3s, box-shadow 0.3s;
            border-top: 5px solid #4fc3f7;
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
        }
        
        .feature-icon {
            font-size: 40px;
            color: #1a237e;
            margin-bottom: 20px;
        }
        
        .feature-card h3 {
            font-size: 22px;
            margin-bottom: 15px;
            color: #1a237e;
        }
        
        /* 交易所列表 */
        .exchanges {
            padding: 80px 0;
            background-color: #f0f7ff;
        }
        
        .exchanges-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .exchange-card {
            background: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
            transition: transform 0.3s;
        }
        
        .exchange-card:hover {
            transform: translateY(-5px);
        }
        
        .exchange-header {
            padding: 25px;
            background: linear-gradient(to right, #1a237e, #283593);
            color: white;
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .exchange-icon {
            font-size: 32px;
        }
        
        .exchange-header h3 {
            font-size: 22px;
        }
        
        .exchange-body {
            padding: 25px;
        }
        
        .exchange-feature {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
        }
        
        .exchange-feature i {
            color: #4fc3f7;
            margin-right: 10px;
            font-size: 18px;
        }
        
        .exchange-download {
            text-align: center;
            margin-top: 20px;
        }
        
        .exchange-btn {
            display: inline-block;
            padding: 12px 25px;
            background-color: #1a237e;
            color: white;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            transition: background-color 0.3s;
        }
        
        .exchange-btn:hover {
            background-color: #283593;
        }
        
        /* 常见问题 */
        .faq {
            padding: 80px 0;
            background-color: white;
        }
        
        .faq-item {
            margin-bottom: 20px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
        }
        
        .faq-question {
            padding: 20px;
            background-color: #f8f9fa;
            font-weight: 600;
            font-size: 18px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .faq-question i {
            transition: transform 0.3s;
        }
        
        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s, padding 0.3s;
        }
        
        .faq-item.active .faq-answer {
            padding: 20px;
            max-height: 500px;
        }
        
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        
        /* 页脚 */
        footer {
            background-color: #1a237e;
            color: white;
            padding: 60px 0 30px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-column h3 {
            font-size: 20px;
            margin-bottom: 25px;
            color: #4fc3f7;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: #4fc3f7;
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 14px;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero-content {
                flex-direction: column;
            }
            
            .hero-text {
                padding-right: 0;
                margin-bottom: 40px;
                text-align: center;
            }
            
            .hero-text h2 {
                font-size: 36px;
            }
            
            .download-buttons {
                justify-content: center;
            }
        }
        
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            
            nav {
                display: none;
                width: 100%;
                margin-top: 20px;
            }
            
            nav.active {
                display: block;
            }
            
            nav ul {
                flex-direction: column;
                gap: 15px;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .hero-text h2 {
                font-size: 32px;
            }
            
            .section-title h2 {
                font-size: 30px;
            }
        }
        
        @media (max-width: 576px) {
            .hero {
                padding: 50px 0;
            }
            
            .features, .exchanges, .faq {
                padding: 50px 0;
            }
            
            .hero-text h2 {
                font-size: 28px;
            }
            
            .download-btn {
                width: 100%;
                justify-content: center;
            }
        }