* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}
body {
    background: #f5f7fa;
    display: flex;
    height: 100vh;
}
/* 左侧侧边栏 */
.sidebar {
    width: 260px;
    background: #2f4050;
    color: #fff;
    overflow-y: auto;
}
.sidebar h2 {
    padding: 20px;
    text-align: center;
    background: #1ab394;
    margin-bottom: 10px;
}
/* 分类菜单 */
.menu-item {
    padding: 12px 20px;
    cursor: pointer;
    border-left: 3px solid transparent;
}
.menu-item:hover {
    background: #3d5060;
    border-left: 3px solid #1ab394;
}
.menu-item.active {
    background: #1ab394;
}
/* 子菜单折叠 */
.sub-menu {
    display: none;
    background: #354655;
}
.sub-menu a {
    display: block;
    padding: 10px 30px;
    color: #e4e4e4;
    text-decoration: none;
    font-size: 14px;
}
.sub-menu a:hover {
    background: #3d5060;
    color: #fff;
}
/* 右侧内容区 */
.content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
    background: #fff;
}
.content h1 {
    font-size: 24px;
    color: #333;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}
.content p {
    font-size: 15px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 15px;
}
/* 后台通用样式 */
.admin-box {
    width: 800px;
    margin: 50px auto;
    background: #fff;
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
.admin-box h2 {
    margin-bottom: 20px;
    color: #333;
}
.form-item {
    margin-bottom: 15px;
}
.form-item label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}
.form-item input, .form-item select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 3px;
}
button {
    background: #1ab394;
    color: #fff;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 3px;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
table th, table td {
    padding: 10px;
    border: 1px solid #ddd;
    text-align: left;
}
/* 富文本编辑器 */
#editor {
    height: 400px;
    border: 1px solid #ddd;
}