/* CSS重置 */
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,button,textarea,blockquote,th,td,p{margin:0;padding:0}
input,button,select,textarea{outline:none}
ol,ul,li{list-style:none}
fieldset,img {border:none;}
img{}
textarea{overflow:auto;vertical-align:top;resize:none;}
* html body{background-image:url(about:blank);background-attachment:fixed;}
body{width:auto;height:auto;_height:100%;min-height:100%;color:#666;background:#FFF;}
body,input,textarea{font: 12px/1.5 "Microsoft Yahei",arial,Simsun;}
button,input,select,textarea {font-size:100%;}
h1,h2,h3,h4,h5,h6 {font-size:100%;font-weight:normal}
table {border-collapse:collapse;border-spacing:0}
a{color:#666;text-decoration:none;cursor:pointer;}
a:hover{color:#2E84CA;text-decoration:none;}
a:focus{outline:0;}
button:focus,input:focus,textarea:focus,select:focus {outline-width: 0;}
.clear{clear:both}
.clearfix:after,.c:after{content:".";display:block;font-size:0;height:0;clear:both;visibility:hidden}
.clearfix,.c{zoom:1}

/* 字体 */
.f8{font-size:8px;}
.f12{font-size:12px;}
.f14{font-size:14px;}
.f16{font-size:16px;}
.f18{font-size:18px;}
.f20{font-size:20px;}
.f22{font-size:22px;}
.f24{font-size:24px;}
.f26{font-size:26px;}
.f28{font-size:28px;}
.f30{font-size:30px;}
.f_c_000{color:#000;}
.f_c_fff{color:#fff;}
.f_c_333 {color:#333;}
.f_c_666 {color:#666;}
.f_c_999 {color:#999;}
.f_c_ccc{color:#CCC;}
.f_c_f00{color:#F00;}
.f_c_f63 {color:#f63;}


.f_simsun{font-family:"Simsun";}
.f_yahei{font-family:"Microsoft Yahei";}
.f_arial{font-family:Arial;}
.f_verdana{font-family:Verdana;}
.tal{text-align:left;}
.tar{text-align:right;}
.tac{text-align:center;}
.fwn{font-weight:normal;}
.fwb{font-weight:bold;}
.vat{vertical-align:top;}
.vam{vertical-align:middle;}
.vab{vertical-align:bottom;}
.tin2{text-indent:2em;}
.tin99{text-indent:-9999px}
.lhn{line-height:normal}
.lh18{line-height:18px}
.lh20{line-height:20px}
.lh22{line-height:22px}
.lh24{line-height:24px}

/* 定位 */
.fl{float:left;}
.fr{float:right;}
.fixed{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;}
.por,.posr{position:relative;}
.poa,.posa{position:absolute;}
.dn,.dsn{display:none;}
.di{display:inline;}
.db{display:block;}
.dib{display:inline-block;*display:inline;*zoom:1;}
.dib_wrap {font-size:0;*word-spacing:-1px;}
.dib_wrap .dib{font-size: 12px;letter-spacing: normal;word-spacing: normal;vertical-align:top;}
@media screen and (-webkit-min-device-pixel-ratio:0){.dib_wrap{letter-spacing:-4px;}}
.zoom{zoom:1;}
.z0{z-index:0}
.z1{z-index:1}
.z2{z-index:2}
.z3{z-index:3}
.z4{z-index:4}
.z9{z-index:9}
.z99{z-index:99}

/* 宽度 */
.w10{width:10px}
.w15{width:15px}
.w20{width:20px}
.w30{width:30px}
.w35{width:35px}
.w40{width:40px}
.w50{width:50px}
.w60{width:60px}
.w70{width:70px}
.w80{width:80px}
.w90{width:90px}
.w100{width:100px}
.w120{width:120px}
.w200{width:200px}
.w250{width:250px}
.w300{width:300px}
.w400{width:400px}
.w500{width:500px}
.w600{width:600px}
.w700{width:700px}
.w730{width:730px}
.w800{width:800px}
.w940{width:940px}
.w960{width:960px}
.w980{width:980px}
.w1000{width:1000px}
.w1200{width:1200px}


/* 边距 */
.m_auto{margin-left:auto;margin-right:auto;}

.m0{margin:0}
.m5{margin:5px}
.m10{margin:10px}
.m15{margin:15px}
.m30{margin:30px}

.mt0{margin-top:0}
.mt2{margin-top:2px;}
.mt3{margin-top:3px;}
.mt5{margin-top:5px}
.mt10{margin-top:10px}
.mt15{margin-top:15px}
.mt20{margin-top:20px}
.mt25{margin-top:25px}
.mt30{margin-top:30px}
.mt40{margin-top:40px}
.mt50{margin-top:50px}
.mt100{margin-top:100px}

.mb0{margin-bottom:0}
.mb2{margin-bottom:2px}
.mb3{margin-bottom:3px}
.mb5{margin-bottom:5px}
.mb10{margin-bottom:10px}
.mb15{margin-bottom:15px}
.mb20{margin-bottom:20px}
.mb25{margin-bottom:25px}
.mb30{margin-bottom:30px}
.mb50{margin-bottom:50px}
.mb100{margin-bottom:100px}

.ml0{margin-left:0}
.ml2{margin-left:2px}
.ml3{margin-left:3px}
.ml5{margin-left:5px}
.ml10{margin-left:10px}
.ml15{margin-left:15px}
.ml20{margin-left:20px}
.ml25{margin-left:25px}
.ml30{margin-left:30px}
.ml50{margin-left:50px}
.ml100{margin-left:100px}

.mr0{margin-right:0}
.mr2{margin-right:2px}
.mr3{margin-right:3px}
.mr5{margin-right:5px}
.mr10{margin-right:10px}
.mr15{margin-right:15px}
.mr20{margin-right:20px}
.mr25{margin-right:25px}
.mr30{margin-right:30px}
.mr50{margin-right:50px}
.mr100{margin-right:100px}

.p0{padding:0}
.p5{padding:5px}
.p8{padding:8px}
.p10{padding:10px}
.p15{padding:15px}
.p20{padding:20px}
.p30{padding:30px}
.p50{padding:50px}

.pt0{padding-top:0}
.pt5{padding-top:5px;}
.pt10{padding-top:10px}
.pt15{padding-top:15px}
.pt20{padding-top:20px}
.pt30{padding-top:30px}
.pt40{padding-top:40px;}
.pt50{padding-top:50px}
.pt100{padding-top:100px}

.pb0{padding-bottom:0}
.pb5{padding-bottom:5px}
.pb10{padding-bottom:10px}
.pb15{padding-bottom:15px}
.pb20{padding-bottom:20px}
.pb30{padding-bottom:30px}
.pb50{padding-bottom:50px}
.pb100{padding-bottom:100px}

.pl0{padding-left:0}
.pl5{padding-left:5px}
.pl10{padding-left:10px}
.pl15{padding-left:15px}
.pl20{padding-left:20px}
.pl25{padding-left:25px}
.pl30{padding-left:30px}
.pl50{padding-left:50px}
.pl60{padding-left:60px;}
.pl100{padding-left:100px}

.pr0{padding-right:0}
.pr5{padding-right:5px}
.pr10{padding-right:10px}
.pr15{padding-right:15px}
.pr20{padding-right:20px}
.pr30{padding-right:30px}
.pr50{padding-right:50px}
.pr100{padding-right:100px}

.bdn { border:none !important;}

/* 背景颜色控制 */
.bgf{background-color: #fff}
.bg0{background-color: #000}
.bgt{background-color:transparent}

/* course */
.pointer{cursor: pointer;_cursor: hand;}
.normal{cursor: default;}

 body {
    position: relative;
}
.danmu {
    width: 300px;
    height: 273px;
    position: fixed;
    bottom: -50%;
    right:-50%; 
    z-index: 999999;
    /* display: none; */
}
.danmu img {
    width: 100%;
    height: 100%;
}