/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* 布局样式 */
header {
    background-color: #4a90e2;
    color: white;
    padding: 1rem;
    text-align: center;
}

nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    padding: 1rem 0;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    margin: 0 0.5rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

nav a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

section {
    margin-bottom: 2rem;
}

/* 区域网格布局 */
.region-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

.region-card {
    background-color: white;
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
    color: #333;
    text-decoration: none;
}

.region-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 页脚样式 */
footer {
    text-align: center;
    padding: 1rem;
    background-color: #333;
    color: white;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .region-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .region-grid {
        grid-template-columns: 1fr;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav a {
        display: block;
        margin: 0.5rem 0;
    }
}