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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background: white;
    min-height: 100vh;
}

header {
    text-align: center;
    padding: 30px 0;
    border-bottom: 2px solid #eee;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2rem;
    color: #2c3e50;
    margin: 0;
}

.download-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.download-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 8px;
    border-left: 4px solid #3498db;
    transition: all 0.3s ease;
}

.download-item:hover {
    background: #f0f0f0;
    transform: translateX(5px);
}

.download-info h3 {
    margin: 0 0 5px 0;
    color: #2c3e50;
    font-size: 1.1rem;
}

.download-info p {
    margin: 0;
    color: #7f8c8d;
    font-size: 0.9rem;
}

.download-btn {
    background: #3498db;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.3s ease;
}

.download-btn:hover {
    background: #2980b9;
}

footer {
    text-align: center;
    padding: 30px 0;
    border-top: 2px solid #eee;
    margin-top: 30px;
    color: #7f8c8d;
}

/* 响应式设计 */
@media (max-width: 600px) {
    .container {
        padding: 15px;
    }

    .download-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .download-btn {
        align-self: stretch;
        text-align: center;
    }
}