* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    background-color: #ffffff;
    color: #2c3e50;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    flex: 1;
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 30px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding: 20px;
}

.logo {
    max-width: 180px;
    margin-bottom: 25px;
    transition: transform 0.3s;
}

h1 {
    font-size: 28px;
    color: #1a202c;
    margin-bottom: 30px;
    font-weight: 600;
}

.download-sections {
    display: flex;
    flex-direction: column;
    gap: 40px;
    margin: 0 auto;
    width: 100%;
    max-width: 1600px;
    flex: 1;
}

.section {
    background: #f8f9fa;
    border-radius: 24px;
    padding: 40px;
}

h2 {
    font-size: 24px;
    margin-bottom: 40px;
    color: #1a202c;
    text-align: center;
    font-weight: 600;
}

.download-options {
    display: flex;
    gap: 40px;
    justify-content: center;
    flex-wrap: wrap;
    padding: 20px;
}

.download-item {
    text-align: center;
    padding: 40px;
    background: white;
    border-radius: 20px;
    transition: all 0.3s ease;
    width: 400px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.download-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

.app-icon {
    width: 240px;
    height: 240px;
    margin-bottom: 30px;
    object-fit: contain;
    transition: all 0.3s ease;
}

.download-item:hover .app-icon {
    transform: scale(1.05);
}

h3 {
    font-size: 24px;
    margin-bottom: 25px;
    color: #1a202c;
    font-weight: 600;
}

.download-btn {
    display: inline-block;
    padding: 16px 40px;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 18px;
    font-weight: 500;
    width: 260px;
}

.download-btn:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.contact-section {
    text-align: center;
    margin: 40px auto;
    padding: 40px;
    width: 100%;
    max-width: 1600px;
}

.qr-code img {
    width: 180px;
    margin-bottom: 15px;
    border-radius: 12px;
    padding: 10px;
    background: white;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s ease;
}

.qr-code p {
    font-size: 16px;
    color: #4a5568;
    font-weight: 500;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding: 30px;
    background: #f8f9fa;
}

.links {
    margin-bottom: 20px;
}

.links a {
    margin: 0 20px;
    color: #2d3436;
    text-decoration: none;
    font-size: 16px;
    transition: all 0.3s ease;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
}

.links a:hover {
    background-color: #e9ecef;
}

.icp a {
    color: #718096;
    text-decoration: none;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    h1 {
        font-size: 22px;
    }
    
    h2 {
        font-size: 20px;
    }
    
    .download-item {
        width: 100%;
        max-width: 340px;
        padding: 30px;
    }

    .logo {
        max-width: 140px;
    }
    
    .app-icon {
        width: 180px;
        height: 180px;
    }
    
    .download-btn {
        width: 220px;
        padding: 14px 30px;
        font-size: 16px;
    }
    
    .links a {
        margin: 0 10px;
        font-size: 15px;
    }
} 

.system-info {
    margin: 30px auto 0;
    padding: 20px;
    background: white;
    border-radius: 16px;
    display: inline-block;
    text-align: left;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border: 1px solid #e2e8f0;
    max-width: 400px;
    width: 90%;
}

.system-info-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 12px;
    border-bottom: 2px solid #f0f2f5;
}

.system-icon {
    font-size: 24px;
    margin-right: 10px;
}

.system-info-header span {
    font-size: 18px;
    font-weight: 600;
    color: #2d3748;
}

.system-info-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.info-item {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    background: #f8f9fa;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.info-item:hover {
    background: #edf2f7;
    transform: translateX(5px);
}

.info-icon {
    font-size: 16px;
    margin-right: 12px;
    opacity: 0.8;
}

.info-item span {
    font-size: 14px;
    color: #4a5568;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .system-info {
        padding: 15px;
        margin-top: 20px;
    }

    .system-info-header {
        margin-bottom: 12px;
    }

    .system-icon {
        font-size: 20px;
    }

    .system-info-header span {
        font-size: 16px;
    }

    .info-item {
        padding: 6px 10px;
    }

    .info-item span {
        font-size: 13px;
    }
}

/* Logo 链接样式 */
.logo-link {
    display: inline-block;
    transition: transform 0.3s ease;
}

.logo-link:hover {
    transform: scale(1.05);
}

.auto-detect {
    font-size: 16px;
    color: #3498db;
    font-weight: normal;
    margin-left: 10px;
}

@media (max-width: 768px) {
    .auto-detect {
        display: block;
        font-size: 14px;
        margin-top: 5px;
        margin-left: 0;
    }
}