* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}
body {
    display: flex;
    min-height: 100vh;
    background-color: #f5f5f5;
}

/* 左侧导航栏样式 */
.sidebar {
    width: 250px;
    background-color: #2c3e50;
    color: white;
    padding: 20px 0;
    height: 100vh;
    position: fixed;
    overflow-y: auto;
}
        
.logo {
    text-align: center;
    padding: 10px 20px;
    margin-bottom: 30px;
    font-size: 24px;
    font-weight: bold;
    border-bottom: 1px solid #34495e;
}
        
.nav-menu {
    list-style: none;
}
        
.nav-item {
    padding: 15px 25px;
    cursor: pointer;
    transition: background-color 0.3s;
}
        
.nav-item:hover {
    background-color: #34495e;
}

.nav-item.active {
    background-color: #3498db;
}
        
/* 右侧内容区域样式 */
.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 30px;
    background-color: white;
    min-height: 100vh;
}
        
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}
        
.page-title {
    font-size: 28px;
    color: #333;
}
        
.content {
    line-height: 1.6;
    color: #555;
}
        
/* 响应式设计 - 在小屏幕上调整布局 */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    .main-content {
        margin-left: 0;
    }
}