/*中间整体布局*/
#buju {
    width: 100%;
    margin-top: -0.29em;
    background-color: #CCFFFF;
    /*min-height: 32em;*/
}
/*布局左侧菜单栏*/
#game {
    width: 100%;
    min-height: 55.815em;
    overflow: hidden;
    background-color: #CCFFFF;
}
#gameif {    
    border-style: none; 
    width: 100%;
    min-height: 55.815em;
}
.learn_div {
    display: flex;
}
.learn_list {
    width: 500px;
    min-height: 55.815em;
    background: aliceblue;
}
.learn_content {
    min-height: 55.815em;
    background: azure;
    width: 100%;
    padding-left: 20px;
}
.font1 {
    font-size: large;
    font-weight: bolder;
}

.font2 {
    font-weight: normal;
    font-size: medium;
    color: blue;
}
td {
    min-width: 200px;
}
ul:hover {
    cursor: pointer;
}
ul {
    user-select: none;
}
.set_background {
    background-color: cornsilk;
}
.retun_background {
    background: aliceblue;
}
ul.a {list-style-type: circle;}                /*无序列表空圆*//*<li>**</li>*/
ul.b {list-style-type: square;}                /*无序列表实方*/
ol.c {list-style-type: upper-roman;}           /*有序列表罗马*/
ol.d {list-style-type: lower-alpha;}           /*有序列表英文*/
ol.e {list-style-type: cjk-ideographic;}       /*有序列表大写数字*/
ol.f {list-style-type: decimal;                /*有序列表小写数字*/
	 text-indent: -60px;                      /*文本块中首行文本的缩进*/
}               
ol.g {list-style-type: decimal-leading-zero;}  /*有序列表小写数字前面带0*/