/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: #333;
    background-color: #f5f5f5;
}

/* 框架样式 */
frameset {
    border: none;
}

frame {
    border: none;
}

/* 左侧菜单样式 */
.left-menu {
    background-color: #2c3e50;
    color: #fff;
}

.left-menu h3 {
    padding: 15px;
    margin: 0;
    background-color: #34495e;
    font-size: 16px;
    font-weight: bold;
    border-bottom: 1px solid #1a252f;
}

.left-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.left-menu li {
    border-bottom: 1px solid #1a252f;
}

.left-menu a {
    display: block;
    padding: 12px 15px;
    color: #ecf0f1;
    text-decoration: none;
    transition: all 0.3s ease;
}

.left-menu a:hover {
    background-color: #34495e;
    color: #fff;
    padding-left: 20px;
}

/* 右侧内容样式 */
.right-content {
    padding: 20px;
    background-color: #fff;
}

.right-content h2 {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #3498db;
    color: #2c3e50;
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

th, td {
    padding: 10px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: #f8f9fa;
    font-weight: bold;
    color: #2c3e50;
}

tr:hover {
    background-color: #f5f5f5;
}

/* 按钮样式 */
button, input[type="submit"] {
    padding: 8px 16px;
    background-color: #3498db;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

button:hover, input[type="submit"]:hover {
    background-color: #2980b9;
}

/* 表单样式 */
form {
    margin-bottom: 20px;
}

input[type="text"], input[type="password"], textarea, select {
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    width: 100%;
    margin-bottom: 10px;
}

input[type="text"]:focus, input[type="password"]:focus, textarea:focus, select:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

/* 消息提示样式 */
.message {
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 4px;
}

.message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .left-menu {
        width: 100%;
        height: auto;
    }
    
    .right-content {
        width: 100%;
        padding: 10px;
    }
}