* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
        }
        
        body {
            background-color: #f7f9fc;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部导航 */
        .header {
            background-color: #fff;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo-container {
            display: flex;
            align-items: center;
        }
        
        .logo {
            height: 40px;
            margin-right: 15px;
        }
        
        .logo-text {
            font-size: 26px;
            font-weight: bold;
            color: #2a7de1;
        }
        
        .logo-text span {
            color: #f90;
        }
        
        /* 横幅区域 */
        .banner {
            background-image: url('https://p0.ssl.qhimg.com/t01f836a7fc7bc73c2a.jpg');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 80px 0;
            margin-bottom: 80px;
            position: relative;
        }
        
        .banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, rgba(30, 111, 217, 0.85) 0%, rgba(42, 140, 240, 0.75) 100%);
        }
        
        .banner-content {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            min-height: 350px;
        }
        
        .banner-text {
            flex: 1;
            max-width: 600px;
        }
        
        .banner-title {
            font-size: 48px;
            margin-bottom: 15px;
            line-height: 1.2;
        }
        
        .banner-title span {
            color: #ffd43b;
        }
        
        .banner-subtitle {
            font-size: 22px;
            margin-bottom: 40px;
            opacity: 0.9;
        }
        
        .download-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 20px;
        }
        
        .download-btn-main {
            display: inline-flex;
            align-items: center;
            background: #42adfe;
            color: white;
            padding: 18px 35px;
            border-radius: 10px;
            text-decoration: none;
            font-weight: bold;
            font-size: 18px;
            transition: all 0.3s;
            box-shadow: 0 8px 20px rgba(66, 173, 254, 0.4);
            min-width: 250px;
        }
        
        .download-btn-main:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 25px rgba(66, 173, 254, 0.5);
            background: #2a9cf7;
        }
        
        .download-btn-main .icon {
            font-size: 24px;
            margin-right: 15px;
        }
        
        .download-btn-secondary {
            display: inline-flex;
            align-items: center;
            background: linear-gradient(to right, #ff9900, #ffcc66);
            color: white;
            padding: 18px 35px;
            border-radius: 10px;
            text-decoration: none;
            font-weight: bold;
            font-size: 18px;
            transition: all 0.3s;
            box-shadow: 0 8px 20px rgba(255, 153, 0, 0.4);
            min-width: 250px;
        }
        
        .download-btn-secondary:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 25px rgba(255, 153, 0, 0.5);
        }
        
        .download-btn-secondary .icon {
            font-size: 24px;
            margin-right: 15px;
        }
        
        .btn-info {
            margin-left: 10px;
            font-size: 14px;
            font-weight: normal;
            opacity: 0.9;
        }
        
        .network-version {
            margin-top: 20px;
        }
        
        .network-link {
            color: #ffd43b;
            text-decoration: none;
            font-size: 16px;
            border-bottom: 1px solid rgba(255, 212, 59, 0.3);
            padding-bottom: 2px;
            transition: all 0.3s;
        }
        
        .network-link:hover {
            border-bottom-color: #ffd43b;
            color: #fff;
        }
        
        .network-link .icon {
            margin-right: 8px;
        }
        
        .os-support {
            color: rgba(255, 255, 255, 0.9);
            font-size: 16px;
            margin-top: 30px;
        }
        
        .os-support .icon {
            margin-right: 8px;
        }
        
        /* 功能展示区域 */
        .function-section {
            margin-bottom: 100px;
        }
        
        .section-title {
            text-align: center;
            font-size: 36px;
            color: #2a7de1;
            margin-bottom: 20px;
            position: relative;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            width: 60px;
            height: 4px;
            background-color: #f90;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        
        .section-subtitle {
            text-align: center;
            color: #666;
            font-size: 18px;
            margin-bottom: 50px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .function-item {
            display: flex;
            align-items: center;
            margin-bottom: 80px;
            background: white;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
        }
        
        .function-item:nth-child(even) {
            flex-direction: row-reverse;
        }
        
        .function-item .content {
            flex: 1;
            padding: 50px;
        }
        
        .function-item .image {
            flex: 1;
            text-align: center;
            padding: 30px;
        }
        
        .function-item img {
            max-width: 100%;
            border-radius: 10px;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
            transition: transform 0.5s;
        }
        
        .function-item img:hover {
            transform: scale(1.03);
        }
        
        .function-item h2 {
            font-size: 28px;
            color: #2a7de1;
            margin-bottom: 20px;
        }
        
        .function-item p {
            color: #666;
            font-size: 16px;
            line-height: 1.7;
        }
        
        /* 核心特性区域 */
        .features-section {
            margin-bottom: 100px;
        }
        
        .features-container {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 60px;
        }
        
        .feature-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            width: 200px;
            text-align: center;
            position: relative;
            transition: transform 0.3s;
        }
        
        .feature-item:hover {
            transform: translateY(-10px);
        }
        
        .feature-circle {
            width: 150px;
            height: 150px;
            border-radius: 50%;
            background: white;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            margin-bottom: 20px;
            position: relative;
            overflow: hidden;
            transition: all 0.3s;
        }
        
        .feature-item:hover .feature-circle {
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
            transform: scale(1.05);
        }
        
        .feature-circle::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(42, 125, 225, 0.1), rgba(255, 153, 0, 0.1));
            opacity: 0;
            transition: opacity 0.3s;
        }
        
        .feature-item:hover .feature-circle::before {
            opacity: 1;
        }
        
        .feature-icon {
            width: 70px;
            height: 70px;
            z-index: 1;
        }
        
        .feature-item h3 {
            font-size: 18px;
            color: #2a7de1;
            margin-bottom: 10px;
        }
        
        .feature-item p {
            color: #666;
            font-size: 14px;
            line-height: 1.5;
        }
        
        /* 页脚 */
        .footer {
            background: #2a2e37;
            color: #bbb;
            padding: 40px 0 30px;
            text-align: center;
        }
        
        .footer-bottom {
            padding-top: 20px;
            font-size: 14px;
        }
        
        .footer-bottom a {
            color: #bbb;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-bottom a:hover {
            color: #2a7de1;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .banner-content {
                flex-direction: column;
                text-align: center;
            }
            
            .banner-text {
                margin-bottom: 40px;
            }
            
            .function-item, .function-item:nth-child(even) {
                flex-direction: column;
            }
            
            .function-item .content {
                padding: 30px;
            }
            
            .features-container {
                gap: 30px;
            }
            
            .feature-item {
                width: 170px;
            }
            
            .feature-circle {
                width: 130px;
                height: 130px;
            }
        }
        
        @media (max-width: 768px) {
            .banner-title {
                font-size: 36px;
            }
            
            .banner-subtitle {
                font-size: 18px;
            }
            
            .section-title {
                font-size: 28px;
            }
            
            .download-buttons {
                justify-content: center;
            }
            
            .download-btn-main, .download-btn-secondary {
                min-width: 100%;
            }
            
            .function-item h2 {
                font-size: 24px;
            }
            
            .features-container {
                gap: 20px;
            }
            
            .feature-item {
                width: 150px;
            }
            
            .feature-circle {
                width: 120px;
                height: 120px;
            }
        }
        
        @media (max-width: 480px) {
            .banner {
                padding: 60px 0;
            }
            
            .banner-title {
                font-size: 28px;
            }
            
            .banner-subtitle {
                font-size: 16px;
            }
            
            .section-title {
                font-size: 24px;
            }
            
            .section-subtitle {
                font-size: 16px;
            }
            
            .function-item .content {
                padding: 20px;
            }
            
            .feature-item {
                width: 130px;
            }
            
            .feature-circle {
                width: 100px;
                height: 100px;
            }
            
            .feature-icon {
                width: 50px;
                height: 50px;
            }
            
            .feature-item h3 {
                font-size: 16px;
            }
        }