/* 全局样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .flex-between {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .flex-center {
            display: flex;
            justify-content: center;
            align-items: center;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            color: #1a365d;
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }
        
        .section-title h2:after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: linear-gradient(to right, #00d2d3, #1dd1a1);
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        
        .section-title p {
            color: #666;
            max-width: 800px;
            margin: 0 auto;
            font-size: 1.1rem;
        }
        
        /* 头部样式 */
        header {
            background: linear-gradient(135deg, #0c1e3e 0%, #1a365d 100%);
            color: white;
            padding: 20px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo img {
            height: 40px;
            margin-right: 10px;
        }
        
        .logo-text {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
        }
        
        .logo-text span {
            color: #00d2d3;
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 30px;
        }
        
        nav ul li a {
            color: #e2e8f0;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
            font-size: 1.1rem;
        }
        
        nav ul li a:hover {
            color: #00d2d3;
        }
        
        /* 英雄区域 */
        .hero {
            background: linear-gradient(rgba(12, 30, 62, 0.9), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1620336655055-bd87c5d1d73f?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 100px 0;
            text-align: center;
        }
        
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 20px;
            font-weight: 700;
        }
        
        .hero h2 {
            font-size: 1.8rem;
            margin-bottom: 30px;
            font-weight: 400;
            color: #e2e8f0;
        }
        
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 40px;
            line-height: 1.8;
        }
        
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 25px;
            flex-wrap: wrap;
            margin-top: 40px;
        }
        
        .btn {
            padding: 16px 40px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 180px;
        }
        
        .btn-primary {
            background: linear-gradient(to right, #00d2d3, #1dd1a1);
            color: white;
            border: none;
        }
        
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 210, 211, 0.3);
        }
        
        .btn-secondary {
            background: transparent;
            color: white;
            border: 2px solid white;
        }
        
        .btn-secondary:hover {
            background: white;
            color: #1a365d;
            transform: translateY(-3px);
        }
        
        .btn i {
            margin-right: 10px;
        }
        
        /* 安全提醒 */
        .security-notice {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            padding: 20px;
            margin: 30px auto;
            max-width: 900px;
            border-left: 4px solid #00d2d3;
        }
        
        .security-notice h4 {
            color: #00d2d3;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
        }
        
        .security-notice h4 i {
            margin-right: 10px;
        }
        
        .security-notice p {
            margin-bottom: 0;
            font-size: 1rem;
        }
        
        /* 下载指南区域 */
        .download-guide {
            padding: 100px 0;
            background-color: white;
        }
        
        .guide-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 40px;
            margin-top: 50px;
        }
        
        .step-card {
            background: #f8fafc;
            border-radius: 15px;
            padding: 40px 30px;
            text-align: center;
            transition: transform 0.3s, box-shadow 0.3s;
            border: 1px solid #e2e8f0;
            position: relative;
        }
        
        .step-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .step-number {
            position: absolute;
            top: -20px;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 40px;
            background: linear-gradient(to right, #00d2d3, #1dd1a1);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.2rem;
        }
        
        .step-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, #00d2d3, #1dd1a1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            color: white;
            font-size: 2rem;
        }
        
        .step-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: #1a365d;
        }
        
        .step-card p {
            color: #64748b;
            font-size: 1.05rem;
            margin-bottom: 25px;
        }
        
        .step-btn {
            display: inline-block;
            padding: 12px 25px;
            background: #1a365d;
            color: white;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 500;
            transition: background 0.3s;
        }
        
        .step-btn:hover {
            background: #0c1e3e;
        }
        
        /* 平台特性区域 */
        .features {
            padding: 100px 0;
            background-color: #f1f5f9;
        }
        
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 40px;
            margin-top: 40px;
        }
        
        .feature-card {
            background: white;
            border-radius: 15px;
            padding: 40px 30px;
            text-align: center;
            transition: transform 0.3s, box-shadow 0.3s;
            border: 1px solid #e2e8f0;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, #00d2d3, #1dd1a1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            color: white;
            font-size: 1.8rem;
        }
        
        .feature-card h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: #1a365d;
        }
        
        .feature-card p {
            color: #64748b;
            font-size: 1.05rem;
        }
        
        /* 注册指引区域 */
        .registration {
            padding: 100px 0;
            background-color: white;
        }
        
        .registration-steps {
            max-width: 900px;
            margin: 50px auto 0;
        }
        
        .registration-step {
            display: flex;
            align-items: center;
            margin-bottom: 50px;
            background: #f8fafc;
            border-radius: 15px;
            padding: 30px;
            border-left: 5px solid #00d2d3;
        }
        
        .step-content {
            flex: 1;
        }
        
        .step-content h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: #1a365d;
        }
        
        .step-content p {
            color: #64748b;
            margin-bottom: 20px;
        }
        
        .step-image {
            flex: 0 0 250px;
            margin-left: 30px;
        }
        
        .step-image img {
            max-width: 100%;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        /* 下载区域 */
        .download-section {
            padding: 100px 0;
            background: linear-gradient(135deg, #0c1e3e 0%, #1a365d 100%);
            color: white;
            text-align: center;
        }
        
        .download-options {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }
        
        .download-card {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 15px;
            padding: 40px 30px;
            backdrop-filter: blur(10px);
            transition: transform 0.3s, background 0.3s;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .download-card:hover {
            transform: translateY(-10px);
            background: rgba(255, 255, 255, 0.15);
        }
        
        .download-icon {
            font-size: 3.5rem;
            margin-bottom: 25px;
            color: #00d2d3;
        }
        
        .download-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }
        
        .download-card p {
            color: #cbd5e0;
            margin-bottom: 25px;
        }
        
        .download-btn {
            display: inline-block;
            padding: 12px 30px;
            background: #00d2d3;
            color: white;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: background 0.3s;
        }
        
        .download-btn:hover {
            background: #1dd1a1;
        }
        
        /* 常见问题区域 */
        .faq {
            padding: 100px 0;
            background-color: #f1f5f9;
        }
        
        .faq-container {
            max-width: 900px;
            margin: 0 auto;
        }
        
        .faq-item {
            margin-bottom: 15px;
            border-radius: 10px;
            overflow: hidden;
            border: 1px solid #e2e8f0;
            background: white;
        }
        
        .faq-question {
            padding: 20px 25px;
            background: #f8fafc;
            font-size: 1.2rem;
            font-weight: 600;
            color: #1a365d;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .faq-question i {
            transition: transform 0.3s;
        }
        
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        
        .faq-answer {
            padding: 0 25px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s, padding 0.3s;
        }
        
        .faq-item.active .faq-answer {
            padding: 25px;
            max-height: 500px;
        }
        
        .faq-answer p {
            color: #475569;
            line-height: 1.7;
        }
        
        /* 页脚 */
        footer {
            background: #0c1e3e;
            color: #cbd5e0;
            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 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 25px;
            position: relative;
        }
        
        .footer-column h3:after {
            content: '';
            position: absolute;
            width: 40px;
            height: 3px;
            background: #00d2d3;
            bottom: -8px;
            left: 0;
        }
        
        .footer-column ul {
            list-style: none;
        }
        
        .footer-column ul li {
            margin-bottom: 12px;
        }
        
        .footer-column ul li a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-column ul li a:hover {
            color: #00d2d3;
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #334155;
            color: #94a3b8;
            font-size: 0.9rem;
        }
        
        .official-notice {
            background: rgba(0, 210, 211, 0.1);
            border-radius: 10px;
            padding: 15px;
            margin-top: 20px;
            font-size: 0.9rem;
            border-left: 3px solid #00d2d3;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .hero h2 {
                font-size: 1.5rem;
            }
            
            .registration-step {
                flex-direction: column;
            }
            
            .step-image {
                margin-left: 0;
                margin-top: 30px;
                flex: 0 0 auto;
            }
            
            nav ul {
                display: none;
            }
            
            .mobile-menu-btn {
                display: block;
                background: none;
                border: none;
                color: white;
                font-size: 1.5rem;
                cursor: pointer;
            }
        }
        
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2rem;
            }
            
            .hero h2 {
                font-size: 1.3rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
            
            .btn {
                padding: 14px 30px;
                font-size: 1rem;
                min-width: 160px;
            }
            
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
        }