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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 500px;
}

.download-card {
    background: white;
    border-radius: 16px;
    padding: 40px 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
}

.app-title {
    font-size: 28px;
    color: #333;
    margin-bottom: 30px;
    font-weight: 600;
}

.download-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 30px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    width: 100%;
    justify-content: center;
}

.download-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.download-button:active {
    transform: translateY(0);
}

/* 备用下载方式样式 */
.download-options {
    margin-top: 30px;
    padding-top: 25px;
    border-top: 1px solid #e0e0e0;
}

.option-title {
    font-size: 14px;
    color: #666;
    margin-bottom: 15px;
    font-weight: 500;
}

.option-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding: 10px;
    background: #f5f5f5;
    border-radius: 8px;
}

.option-item span {
    font-size: 14px;
    color: #333;
    flex: 1;
    text-align: left;
}

.option-button {
    background: #4CAF50;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.option-button:hover {
    background: #45a049;
    transform: scale(1.05);
}

.option-button:active {
    transform: scale(0.98);
}

/* 链接显示框 */
.link-display {
    margin-top: 15px;
}

.link-display input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 13px;
    font-family: 'Courier New', monospace;
    background: #fafafa;
    color: #333;
    cursor: text;
}

.link-display input:focus {
    outline: none;
    border-color: #667eea;
    background: white;
}

/* 提示信息框 */
.tips-box {
    margin-top: 25px;
    padding: 15px;
    background: #fff3cd;
    border-radius: 8px;
    border-left: 4px solid #ffc107;
    text-align: left;
}

.tips-title {
    font-size: 14px;
    font-weight: 600;
    color: #856404;
    margin-bottom: 10px;
}

.tips-list {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.tips-list li {
    font-size: 13px;
    color: #856404;
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
    line-height: 1.5;
}

.tips-list li:before {
    content: "•";
    position: absolute;
    left: 8px;
    color: #ffc107;
    font-weight: bold;
}

.tips-list li:last-child {
    margin-bottom: 0;
}

.footer {
    margin-top: 30px;
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 480px) {
    .download-card {
        padding: 30px 20px;
    }
    
    .app-title {
        font-size: 24px;
        margin-bottom: 25px;
    }
    
    .download-button {
        padding: 12px 24px;
        font-size: 14px;
    }
    
    .option-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .option-item span {
        font-size: 13px;
    }
    
    .option-button {
        width: 100%;
        padding: 10px;
    }
    
    .tips-box {
        padding: 12px;
    }
    
    .tips-list li {
        font-size: 12px;
    }
}