/* 全局样式 */
body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
}

/* 头部图片样式 */
.header-image {
    width: 100%;
    text-align: center;
    padding: 10px 0;
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header-image img {
    width: 100%;
    height: auto;
    max-height: 120px;
}

/* 菜单栏样式 */
.menu-bar {
    display: flex;
    justify-content: center;
    background-color: #4CAF50;
    padding: 10px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.menu-btn {
    background-color: inherit;
    border: none;
    color: white;
    padding: 12px 24px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
    border-radius: 4px 4px 0 0;
    margin: 0 5px;
}

.menu-btn:hover {
    background-color: #45a049;
}

.menu-btn.active {
    background-color: #3e8e41;
    font-weight: bold;
}

/* 内容框架样式 */
.content-frame {
    width: 90%;
    margin: 20px auto;
    min-height: 500px;
    background-color: white;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    overflow: hidden;
}

#contentFrame {
    width: 100%;
    min-height: 800px;
}