body{margin:0 auto; padding:0; width:100%; min-width:320px;  max-width:640px;}
img{width:100%;}
li{list-style-type:none;}
ul, li{margin:0;padding:0;-webkit-text-size-adjust: none}
p,video{margin:0; padding:0;}
video{max-width:100%; height:auto;}

.expand_all{width:100%; margin:0 auto; overflow:hidden;}
.expand_0{position:relative; z-index:1;}
.expand_00{position:absolute; z-index:0;}
.expand_1{width:78.4375%; margin:41px auto 0 auto; overflow:hidden;}
.expand_2{width:78.4375%; margin:0 auto; overflow:hidden;}
.expand_2 p{font-family:"微软雅黑"; font-size:18px; line-height:32px; letter-spacing:1px;}
.expand_3{width:85.46875%; margin:0 auto; overflow:hidden;}
.expand_4{margin:5% auto 6% auto; width:100%;}
.expand_5{width:51.25%; margin:4.8% auto 3.6% auto; overflow:hidden;}
.expand_0{width: 85.3125%; margin: 0 auto 4.5% auto; overflow: hidden;}
.expand_6{width:94.375%; margin:3% auto 5% auto; overflow:hidden;}
.expand_7{width:31.9536%; float:left; overflow:hidden;}
.expand_8{margin-right:2.0696%;}
.expand_9{width:96.875%; margin:0 auto 5px auto; overflow:hidden;}
/* 效果CSS开始 */
.slider{display:none;}/*用于获取更加体验*/
.focus span{width:16px;height:16px; margin-right:10px; border-radius:50%;background:#9395b9;font-size:0;}
.focus span.current{background:#292e81;}
/* 效果CSS结束 */
@media screen and (max-width:320px){ video{width:320px; height:auto;}}
@media screen and (min-width:330px) and (max-width:480px){ video{width:390px; height:auto;}}
@media screen and (min-width:490px) and (max-width:640px){ video{width:560px; height:auto;}}
@media screen and (mim-width:650px){ video{width:560px; height:auto;}}

@media screen and (max-width:320px){
    .expand_2 p{font-size:9px; line-height:16px; letter-spacing:1px;}
    .focus span{width:8px;height:8px; margin-right:10px; border-radius:50%;background:#9395b9;font-size:0;}
}
@media screen and (min-width:330px) and (max-width:480px){
    .expand_2 p{font-size:11px; line-height:24px; letter-spacing:1px;}
    .focus span{width:12px;height:12px; margin-right:10px; border-radius:50%;background:#9395b9;font-size:0;}
}
@media screen and (min-width:490px) and (max-width:640px){
    .expand_2 p{font-size:18px; line-height:32px; letter-spacing:1px;}
    .focus span{width:16px;height:16px; margin-right:10px; border-radius:50%;background:#9395b9;font-size:0;}
}
@media screen and (mim-width:650px){
    .expand_2 p{font-size:18px; line-height:32px; letter-spacing:1px;}
    .focus span{width:16px;height:16px; margin-right:10px; border-radius:50%;background:#9395b9;font-size:0;}
}
.teachers_11{width: 66.25%; overflow: hidden; margin:5.1% auto;}
.teachers_11>a{float: left; width: 47%; display: block;}
.teachers_12{width: 96.875%; overflow: hidden; margin: 0 auto 5.1% auto;}