html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    min-height: 100vh;

}
.NavMain {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}
/* 仅放大顶部导航菜单文字，不影响页面其余任何内容 */
#navbar nav.hidden.md\:flex a {
    font-size: 16px !important;
}
/* 同步移动端下拉导航字号 */
#navbar #mobile-menu a {
    font-size: 16px !important;
}
#navbar{
   padding: 0;
    padding-top: 0px;
}
    
#head {
    flex-shrink: 0;
    height: 12px;
    width: 100%;
    background: #D2E4FC;
   	/* background: #2554C7;  深蓝色，边界一眼看清，替代原来#D2E4FC浅蓝 */
		 padding: 0;

    box-sizing: border-box;
}
#content {
    flex: 1;
    width: 100%;
    display: flex;
    flex-direction: row;
    /* 解决页面缩放高度锁死关键 */
    min-height: 0;
    box-sizing: border-box;
    /* 禁止浏览器自动生成固定行内height */
    height: auto !important;

    /* 给iframe区域底层铺白色，防止透父层蓝色 */
    background: #fff;
        padding-top: 80px;


}
#left {
    width: 350px;
    flex-shrink: 0;
    height: 100%;
    background: #ffffff;

    border: 1px solid #3153C3;
    box-sizing: border-box;
    overflow: hidden;
}
#center {
    flex: 1;
    min-height: 0;
    height: 100%;
    border: 1px solid #3153C3;
    box-sizing: border-box;
    overflow: hidden;
}
#foot {
    flex-shrink: 0;
    height: 80px;
    width: 100%;
    background: #0099CC;
    box-sizing: border-box;
    display: none; /* 框架页面直接隐藏底部，不占用高度 */

}
iframe {
    display: block;
    width: 100%;
    height: 100%;
    border: none;
}