body {
    font-family: Arial, sans-serif;
    background-color: #f0f2f5;
    margin: 0;
    padding: 0;
}

.nav-container {
    display: flex;
    min-height: 100vh;
}

/* 导航左侧栏 */
.nav-sidebar {
    width: 200px;
    background-color: #fff;
    padding: 20px;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}

.nav-sidebar h2 {
    font-size: 1.2rem;
    color: #333;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.nav-sidebar ul {
    list-style-type: none;
    padding: 0;
    margin-top: 20px;
}

.nav-sidebar li {
    margin-bottom: 10px;
}

.nav-sidebar a {
    display: block;
    padding: 10px;
    text-decoration: none;
    color: #555;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.nav-sidebar a:hover, .nav-sidebar .active a {
    background-color: #e6f7ff;
    color: #1890ff;
}

/* 导航右侧内容 */
.nav-content {
    flex-grow: 1;
    padding: 20px 40px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.search-box {
    display: flex;
    border: 1px solid #ccc;
    border-radius: 20px;
    overflow: hidden;
}

.search-box input {
    border: none;
    padding: 8px 15px;
    outline: none;
    width: 250px;
}

.search-box button {
    border: none;
    background-color: #1890ff;
    color: #fff;
    padding: 8px 15px;
    cursor: pointer;
}

.category {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.category h2 {
    font-size: 1.1rem;
    color: #1890ff;
    border-bottom: 2px solid #1890ff;
    padding-bottom: 8px;
    margin-top: 0;
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.link-grid a {
    display: block;
    padding: 10px 12px;
    background-color: #f5f5f5;
    border-radius: 5px;
    text-align: center;
    text-decoration: none;
    color: #333;
    transition: transform 0.2s, background-color 0.2s;
}

.link-grid a:hover {
    transform: translateY(-2px);
    background-color: #e9e9e9;
}