@charset "utf-8";
/* CSS Document */
*{margin:0;padding:0;}
*, :after, :before {
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}
body{ font-family: 'SourceHanSansCN',Arial,sans-serif; margin: 0; padding: 0;min-width: 1300px;}
div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, form, fieldset, input, textarea, blockquote, p { padding: 0; margin: 0; }
ol, ul { list-style: none; }
li { list-style-type: none; }
img { border: 0; vertical-align: top }
h1, h2, h3, h4, h5, h6 { font-weight: normal; }
address, cite, code, em, th, i, b { font-weight: normal; font-style: normal; }
.clearfix { *zoom:1;}
.clearfix:after { display: block; overflow: hidden; clear: both; height: 0; visibility: hidden; content: "."; }
a {  text-decoration: none; outline: none }

/*html5*/
article, aside, dialog, header, section, footer, nav, figure, menu { display: block }
.Hidden { display: none; }
.fl { float: left }
.fr { float: right }
.relative { position: relative }
.absolute { position: absolute }
@font-face { font-family: 'SourceHanSansCN'; src: url('../fonts/SourceHanSansCN/SourceHanSansCN-Light.otf'); font-weight: normal; font-style: normal; }



/*登录*/
.nLogin { width: 100%; min-height: 110vh; background: url(../images/u_bg.jpg) no-repeat center; background-attachment: fixed; padding-top: 10px; }
.nLogin_c { height: 680px; background:#fff; margin: 100px auto 0; box-shadow: 0 0 50px rgba(0, 48, 83, .5);font-family: 'SourceHanSansCN';}
.nLogin_left { height: 680px; background: url(../images/u_left.jpg) no-repeat center; background-size: cover; color: #fff; position: relative;}
.nLogin_left .nlogo{ width: 86%; margin: 100px auto 0;}
.nLogin_left h1{ font-size: 48px; margin: 120px 0 10px 7%; }
.nLogin_left h3{ font-size: 16px; margin-left:7% ;}
.nLogin_left p{ width: 94%;  font-size: 14px; text-align: center;position: absolute; bottom: 10px; left: 3%;}
.el-main{margin:0;padding:0;}
.nLogin_right h1{ font-size: 45px; margin: 120px auto 30px; text-align: center; color: #333;letter-spacing:30px; text-indent: 30px; }
.nLogin_right .el-form-item__label{ width: 100px; font-size: 20px;font-family: 'SourceHanSansCN';text-align: justify; text-align-last: justify;}
.nLogin_right .el-input__inner{ height: 50px; margin-bottom: 10px;}
.nLogin_right .el-button.is-round{ width: 100%; height: 60px; font-size: 30px;font-family: 'SourceHanSansCN'; text-align: center; color: #fff; background: #1799d5;letter-spacing:30px; text-indent: 30px; border-radius: 30px; border:none; margin: 20px auto 10px; }
.nLogin_right p{font-size: 16px; color: #999; text-align: center;}
.nLogin_right p a{ color: #1799d5;}


/*修改密码*/
.ctner{ width: 68%; margin: 0 auto; background-color: #fff;box-shadow: 0 0 15px rgba(0, 0, 0, .1);}
.ctner h3{ font-size: 45px; padding: 70px 0 30px; margin-bottom: 30px; text-align: center; color: #555;letter-spacing:30px; text-indent: 30px; border-bottom: 1px solid #eee;  }
.ctner .el-form-item__label{ font-size: 20px;}
.ctner .el-input__inner{ height: 50px; margin-bottom: 10px;}
.ctner .el-button.is-round{ width: 100%; height: 60px;font-family: 'SourceHanSansCN'; font-size: 30px; text-align: center; color: #fff; background: #1799d5;letter-spacing:30px; text-indent: 30px; border-radius: 30px; border:none; margin: 20px auto 70px;}



/*首页*/
.el-header{ padding: 0;}
.header{background: #32374b;display: flex;display: -webkit-flex;-webkit-align-items: center;align-items: center;-webkit-justify-content: space-between;justify-content: space-between;}
.ilogo { margin-left: 16%;}
.ilogo img{ max-width: 180px;}
.t_right{ margin-right: 16%;font-family: 'SourceHanSansCN'; }
.t_right a.rbtn {width: 150px;height: 30px;border-radius: 15px; border: 1px solid #dcdcdc;font-size: 18px;color: #333;text-align: center;line-height: 30px;float: left;margin: 5px 20px 0 0;}
.t_right a.rbtn:hover {color: #0f88c5;border: 1px solid #0f88c5;-webkit-transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);}
.t_right span {color: #333;font-size: 18px;margin-right: 10px;line-height: 40px;}
.t_right a{ display: block;}
.t_right span{  display: inline-block;color: #aaa; font-size: 18px;  margin-left: 10px; }
.t_right span:hover{ color: #fff;}
.userglhome {flex-direction: column; background-color: white;position: fixed;min-width: 220px;white-space: nowrap;top: 55px;right: 8%;z-index: 99;justify-content: space-around;align-items: flex-start;-webkit-align-items: flex-start;-webkit-justify-content: space-around; cursor: pointer;box-shadow: 0px 0px 8px 0px rgb(0 0 0 / 0.2);display: none;}
.chdicon:hover .userglhome { display: block;}
.iheadicon{ width: 38px; height: 38px; background: #d1d1d1; border-radius: 50%; text-align: center; float: left; overflow: hidden;}
.iheadicon img{ width: 100%; }
.ibanner{ height: 690px; background: url(../images/ibanner_bg.jpg) no-repeat center; display: flex;display: -webkit-flex;-webkit-align-items: center;align-items: center;-webkit-justify-content: space-between;justify-content: space-between;}
.ib_left{ width: 45%; margin-left: 7.5%; }
.ib_right{ width: 31%; height: 545px; padding: 55px 1.5% 0; background-color: rgba(255, 255, 255, 0.2); color: #fff; border-radius: 20px; margin-right: 16%;font-family: 'SourceHanSansCN'; }
.ib_right h1{ font-size: 36px; font-weight:bold; line-height: 60px;}
.ib_right p{ height: 360px; font-size: 18px;line-height: 30px;text-indent:36px;display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 12;text-overflow: ellipsis; overflow: hidden;}
.icourse{ width: 64%; margin: 40px auto; font-family: 'SourceHanSansCN'; }
.icourse h1{ font-size: 36px; font-weight:bold; line-height: 60px;}
.icourse p{ font-size: 18px;line-height: 30px; color: #888;}
.iclist{width: 64%; margin: 0 auto 100px; font-family: 'SourceHanSansCN';display: flex;display: -webkit-flex;flex-wrap: wrap;-webkit-align-items: center;align-items: center;}
.ics1{ width: 31%; margin:25px 3.5% 25px 0; border: 1px solid #ebecec;box-shadow: 0 0 10px rgba(0, 0, 0, .1); padding-top: 20px;}
.ics1:nth-child(3n){ margin-right: 0;}
.ics1 h1{ font-size: 30px; font-weight:bold; line-height: 60px; color: #333; text-align: center;}
.ics1 i{ width: 55px;height: 10px; background-color: #333; display: block; margin: 0 auto;}
.ics1 p{font-size: 16px;line-height: 24px;color: #888;margin: 15px 0 25px;padding: 0 20px;display: -webkit-box;-webkit-box-orient: vertical;-webkit-line-clamp: 5;text-overflow: ellipsis;overflow: hidden;}
.ics1_clf span{ width: 50%; height: 35px;font-size: 16px; line-height: 35px; color: #304b98; text-align: center; border: 1px solid #304b98; display: inline-block;}
.ics1_clf span:first-child{ background-color: #304b98; color: #fff;}


/*底部*/
.footer{ background-color: #32374b; margin-top: 50px;}
.ifter{width: 64%; margin: 0 auto; font-family: 'SourceHanSansCN'; display: flex;display: -webkit-flex;-webkit-align-items: center;align-items: center;-webkit-justify-content: space-between;justify-content: space-between;}
.ft_left img{  max-width: 300px; padding: 50px 0 30px;}
.ft_left p { font-size: 16px; line-height: 30px; color: #aaa;}
.ft_push{ font-size: 16px; line-height: 30px; margin-left: 75px;}
.ft_push h3{ color: #fff; line-height: 45px;}
.ft_push:last-child{ text-align: center;}
.ft_push a{ color: #aaa;}
.ft_push a:hover{ color: #fff;}
.erwm{ width: 100px; height: 100px;}
.cyt{ width: 64%; margin: 10px auto 0;border-top: 1px solid #5b5f6f; font-size: 16px; line-height: 50px;  text-align: center; color: #aaa;}



/*列表*/
.b_bg{ background-color: #f5f6fa;}
.cheader{ background-color: #fff; box-shadow: 0 0 15px rgba(0, 0, 0, .2); z-index: 999;display: flex;display: -webkit-flex;-webkit-align-items: center;align-items: center;-webkit-justify-content: space-between;justify-content: space-between;}
.clogo { margin-left: 16%;}
.clogo img{ max-width: 300px;}
.c_right{ margin-right: 16%; position: relative; }
.c_right a.rbtn{ width: 150px; height: 30px; border-radius: 15px; border: 1px solid #dcdcdc; font-size: 18px; color: #333; text-align: center; line-height: 30px; float: left; margin:5px 20px 0 0;}
.c_right a.rbtn:hover{ color: #0f88c5; border: 1px solid #0f88c5; -webkit-transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1); transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);}
.c_right span{color: #333; font-size: 18px; margin-right: 10px; line-height: 40px;}
.usergl{ flex-direction: column; background-color: white; position: fixed; min-width: 220px; white-space: nowrap; top: 80px; right: 8%; z-index: 99; justify-content: space-around; align-items: flex-start;-webkit-align-items: flex-start;-webkit-justify-content: space-around;cursor: pointer;box-shadow: 0px 0px 8px 0px rgb(0 0 0 / 0.2);display: none;}
.chdicon:hover .usergl{ display:block;}
.userdisname{ display: flex; display: -webkit-flex; align-items: center; -webkit-align-items: center; justify-content: flex-start; -webkit-justify-content: flex-start; padding: 16px; border-bottom: 1px solid #eeeeee; width: 100%; white-space: normal;	height: 70px;}
.userdisname img{width: 48px;height: 48px;border-radius: 100px;}
.userchil{ height: 60px; margin-left: 12px; line-height: 60px; font-size:16px;font-family: 'SourceHanSansCN',Arial,sans-serif;}
.userup {height: 50px; padding-left: 16px; line-height: 50px; vertical-align: middle; display: flex; display: -webkit-flex; align-items: center; -webkit-align-items: center;}
.userup:hover{ background-color: #c4e1ff;-webkit-transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1); transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);}
.userup a{ font-size: 16px;	color: #333;}
.userup:hover a,.userup:hover i{ color:#0f88c5;}
.userup i{ color: #555;font-size: 20px; margin-right: 5px}
.chdicon{ width: 40px; height: 40px; background: #d1d1d1; border-radius: 50%; text-align: center; float: right; overflow: hidden;}
.cselist{ width: 68%; margin: 80px auto 50px; padding-bottom: 80px; background-color: #fff;box-shadow: 0 0 15px rgba(0, 0, 0, .1);}
.cse_tit{ margin: 0 3%; padding-top: 30px; display: flex;display: -webkit-flex;-webkit-align-items: center;align-items: center;-webkit-justify-content: space-between;justify-content: space-between;}
.cse_tit h1{ font-size: 36px; color: #333; font-weight: bold; line-height: 60px;}
.cse_tit p{ font-size: 18px; color: #666;line-height: 60px; }
.course_ul{ margin: 0 3%;display: flex;display: -webkit-flex;flex-wrap: wrap;-webkit-align-items: center;align-items: center;}
.course_li{ width: 31%; margin:25px 3.5% 25px 0; border: 1px solid #ebecec;box-shadow: 0 0 10px rgba(0, 0, 0, .1); position: relative;}
.course_li:hover{box-shadow: 0 0 20px rgba(0, 0, 0, .3);cursor:pointer;-webkit-transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1); transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);}
.course_li:nth-child(3n){ margin-right: 0;}
.course_li .level_i{ position: absolute; right: 0; top: -14px;}
.course_li .le_i{ position: absolute; right: 36px; top: -11px; font-size: 24px; color: #fff;}
.level_c{ width: 100%; height: 175px; overflow: hidden;}
.course_li h1{ font-size: 24px; font-weight:bold; line-height: 60px; color: #333; text-align: center;}
.course_li p{ font-size: 16px;line-height: 24px; color: #888; margin-bottom: 15px; padding: 0 20px;display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 4;text-overflow: ellipsis; overflow: hidden;min-height:100px;}
.course_li span{ width: 100%; height: 35px;font-size: 16px; line-height: 35px; color: #fff; text-align: center; background-color: #2f4b9e; display: inline-block;}
.course_li:hover span{ background-color: #ff6c00;-webkit-transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1); transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);}

/*课程简介*/
.el-image__inner{ vertical-align: middle;}
.int_tli{ height: 180px; background-color: #fff; margin-bottom: 70px; padding: 35px 16% 0 16%; position: relative;}
.int_tic{ height: 50px; display: flex;display: -webkit-flex;-webkit-align-items: center;align-items: center;}
.int_tic .el-image{ width:30px; margin:0 10px;}
.int_tic h1{ font-size: 30px; font-weight: bold; color: #333;}
.int_ctr{ height: 30px;display: flex;display: -webkit-flex;-webkit-align-items: center;align-items: center;}
.int_ctr .el-image{ width:16px; margin:0 10px 0 50px;}
.int_ctr p{ font-size: 16px; color: #999;}
.int_ul { width: 68%; display: flex;display: -webkit-flex;flex-wrap: wrap;-webkit-align-items: center;align-items: center; position: absolute; bottom: 0; left: 16%;}
.int_ul li{ width: 15%; border-bottom: 1px solid #fff; color: #333; font-size: 18px; text-align: center;}
.int_ul li.on{border-bottom: 1px solid #1176c2; color: #1176c2;}
.int_ul li:hover{ cursor: pointer; border-bottom: 1px solid #1176c2; color: #1176c2;-webkit-transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1); transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);}
.intcon{ width: 68%; margin: 0 auto; display: flex;display: -webkit-flex;-webkit-align-items: flex-start;align-items: flex-start;-webkit-justify-content: space-between;justify-content: space-between;}
.int_left{ width: 65%; height: 856px; background-color: #fff;box-shadow: 0 0 10px rgba(0, 0, 0, .1);overflow-y:scroll;}
.cli_1{ height: 80px; padding:0 50px; border-bottom: 1px solid #eee; display: flex;display: -webkit-flex; -webkit-align-items: center;align-items: center;}
.cli_1:hover{ border-bottom: 1px solid #acb7d8;-webkit-transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1); transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);}
.cli_1 .el-image{ width:40px; margin-right:15px;}
.cli_1 h3{ font-size: 16px;color: #666;overflow:hidden; white-space:nowrap; text-overflow:ellipsis; }
.int_right{ width:32%; }
.int_r1{ background-color: #fff;box-shadow: 0 0 10px rgba(0, 0, 0, .1); margin-bottom: 50px; padding-bottom: 12px;}
.int_r1 p{ height: 340px; padding: 18px 18px 0; font-size: 15px; color: #666; line-height: 1.9; overflow-y: auto;text-indent:30px;}
.int_r2{ background-color: #fff;box-shadow: 0 0 10px rgba(0, 0, 0, .1); margin-bottom: 50px; padding-bottom: 40px;}
.int_r2 p{ padding: 25px 25px 0; font-size: 15px; color: #666; line-height: 1.9; }

/*滚动条样式-实验*/
.p1::-webkit-scrollbar {width: 3px;height: 1px;}
.p1::-webkit-scrollbar-thumb { border-radius: 3px; -webkit-box-shadow: inset 0 0 3px rgba(0,0,0,0); background: #acb7d8;}
.p1::-webkit-scrollbar-track { -webkit-box-shadow: inset 0 0 3px rgba(0,0,0,0); background: #fff;}

/*滚动条样式-列表*/
.p1::-webkit-scrollbar {width: 3px;height: 1px;}
.p1::-webkit-scrollbar-thumb { border-radius: 3px; -webkit-box-shadow: inset 0 0 3px rgba(0,0,0,0); background: #acb7d8;}
.p1::-webkit-scrollbar-track { -webkit-box-shadow: inset 0 0 3px rgba(0,0,0,0); background: #fff;}


/*视频播放*/
.detlv{ width: 68%; margin: 30px auto 30px; background-color: #fff;box-shadow: 0 0 15px rgba(0, 0, 0, .1); display: flex;display: -webkit-flex;flex-wrap: wrap;-webkit-align-items: center;align-items: center;}
.dtv_left{ width: 74%; height: 640px; background-color: #000; overflow: hidden; position: relative;}
.dtv_left video{ width: 100%; height: 640px;}
.dtv_left span{ width: 220px; height: 80px; border-radius: 10px; border: 1px solid #e5e5e5; background-color: rgba(255, 255, 255, .2); position: absolute; top: 50%; left: 50%; margin: -40px 0 0 -110px;}
.dtv_left i{border-top: 20px solid transparent; border-left: 40px solid #fff;border-bottom: 20px solid transparent; position: absolute; top: 50%; left: 50%;margin: -20px 0 0 -10px; }
.dtv_left span:hover{ cursor: pointer;}
.dtv_right{ width: 26%; height: 640px; }
.vidc{ height: 50px; background-color: #acb7d8; padding: 0 25px;display: flex;display: -webkit-flex;-webkit-align-items: center;align-items: center;}
.vidc .el-image{ width:25px; margin-right: 10px;}
.vidc h3{ font-size: 30px; color: #333; font-weight: bold;}
.vidcsc{height:590px;overflow-y:auto;}
.vidc_tit{ padding: 12px 15px 12px 15px;display: flex;display: -webkit-flex;-webkit-align-items: center;align-items: center;flex-wrap:wrap;border-bottom:1px solid #EBEBEB;}
.vidc_tit p{ width: 85%;overflow:hidden; white-space:nowrap; text-overflow:ellipsis; font-size: 14px; line-height: 26px; color: #333;}
.vidc_tit i{ width: 15%; height: 18px; border: 1px solid #f00; color: #f00; font-size: 12px; border-radius: 10px; display: block; text-align: center; line-height: 18px;}
.vidc_bg{background-color:#b5dcf5;}
.vidc_pf{ padding: 0 15px;}
.vidc_pf p{ font-size: 12px; color: #333; float: left;}
.el-progress-bar{ width: 100%;}
.el-progress-bar__inner{ background-color: #f00;}
.el-progress__text{ margin-top: 5px;} 
.el-progress-bar__innerText{color:#28e851;}




/*课程信息*/
.corinfo{ width: 68%; margin: 80px auto 30px; padding: 30px 0 60px; background-color: #fff;box-shadow: 0 0 15px rgba(0, 0, 0, .1);}
.cinfo_tit{ height: 70px; border-bottom: 1px solid #eee; padding: 0 3.5%; display: flex;display: -webkit-flex;-webkit-align-items: center;align-items: center;-webkit-justify-content: space-between;justify-content: space-between; }
.cinfo_tit h1{ font-size: 30px; color: #333; font-weight: bold; }
.cinfo_tit p{ font-size: 20px; color: #1176c2;}
.cinfo_tit p a{ color: #1176c2;}
.ifo_img{ width: 20px; float: left; margin-right: 5px;}
.cinfo_t1{ height: 50px; padding: 0 3.5%; background-color: #adafb7; display: flex;display: -webkit-flex;-webkit-align-items: center;align-items: center;flex-wrap: wrap;}
.cinfo_t1 p{ width: 20%; font-size: 18px; color: #333; line-height: 50px;}
.cinfo_t1 p:first-child{ width: 8%;}
.cinfo_t1 p:last-child{ width: 15%;}
.cinfo_t2{ height: 70px; padding: 0 3.5%; border-bottom: 1px solid #eee; display: flex;display: -webkit-flex;-webkit-align-items: center;align-items: center;flex-wrap: wrap;}
.cinfo_t2 p{ font-size: 18px; color: #333; line-height: 50px;}
.cinfo_t2 p:nth-child(1){ width: 8%;}
.cinfo_t2 p:nth-child(2){ width: 20%;}
.cinfo_t2 p:nth-child(3){ width: 15%;}
.cinfo_t2 p:nth-child(4){ width: 57%; text-align: right; font-size: 10px; color: #333; }
.cinfo_t2 p a{ color: #1176c2; font-size: 15px; margin: 0 5px;}
.cinfo_t2 p a:hover{ color: #f00;}
.cinfo_t2 p a:last-child{ margin-right: 0;}
.page{ text-align: center;}


/*添加课程信息*/
.cinfo_add{ width:70%; margin: 50px auto;}
.cinfo_add .el-form-item__label{ font-size: 18px; float: none;}
.cinfo_add .el-input__inner,.cinfo_add .el-textarea__inner{ background-color: #f9f9f9; color: #999;}
.cinfo_add .submit{ width: 20%; font-size: 20px;font-family: 'SourceHanSansCN';}
.cinfo_add .el-select{ display: block;}
.btns{ text-align: center;}
.addxt{ width: 100px; height: 35px; font-size: 18px; padding: 0; background-color: #33b35a; border: none; color: #fff;}
.addxt:hover{ background-color: #45cd6f; color: #fff;}
.cinfo_add .el-radio__label{ font-size: 18px;}
.cinfo_add .el-radio__inner{ width: 18px; height: 18px;}


/*课程习题*/
.test_ar{ width: 100%; height: 100vh; margin:0; position: relative; background-color: #fff; display: flex;display: -webkit-flex;flex-wrap: wrap;}
.test_ar h1{ width: 100%; font-size: 45px; padding: 70px 0 30px; text-align: center; color: #555;letter-spacing:30px; text-indent: -150px; border-bottom: 1px solid #eee; }
.test_ar h4{ width: 100%; color: #f00; text-align: center; margin: 10px 0; display: none;}
.test_fl{width: 100%; height: 80vh; overflow-y: auto; margin-left: 3%; padding:0 80px 80px 0;}
.testcon{ padding: 40px 0  0;}
.tr1{ font-size: 18px; color: #333;}
.tr1 i{ width: 70px; display: inline-block; border: 1px solid #409EFF; color:#409EFF; border-radius: 15px; font-size: 16px; text-align: center; margin-left: 10px;}
.tr2 { margin: 20px 0;}
.tr2 p{ width: 100%; line-height: 40px;}
.tr2 p label{ font-size: 16px; color: #777;}
.tr2 p input{ margin-right: 10px;}
.tr3{ margin: 20px 0; display: none;}
.tr3 span{font-size: 16px; color: #777;}
.tr3 span.cor{ color: #00B895;}
.tr3 span.err{ color: #f00;}
.test_fr{ width: 15%; height:100vh; overflow-y: auto; position:fixed; top: 0; right:0; background-color: #fff;box-shadow: 0 0 15px rgba(0, 0, 0, .1); z-index: 9; padding-bottom: 10vh;}
.test_fr h3{ width: 100%; height: 35px; background: #76ace5; color: #333; text-align: center; font-size: 18px; line-height: 35px;}
.test_fr ul{ width: 100%;display: flex;display: -webkit-flex;flex-wrap: wrap;align-items: flex-start;-webkit-align-items: flex-start;}
.test_fr li{ width: 9.1%; margin-right: 1%;}
.test_fr li:nth-child(10n){ margin-right: 0;}
.test_fr li a{ width: 100%; height: 30px; background: #c4e1ff; color: #333; text-align: center; font-size: 18px; line-height: 30px; margin: 5px auto; display: block;}
.test_btn{  position:absolute; bottom: 5%;; right: 16%; z-index: 99;}
.test_btn .el-button.is-round{ width: 100px; height: 100px; border-radius: 50%; display: block; font-size: 35px;font-family: 'SourceHanSansCN'; text-align: center; color: #fff; padding: 0; background: #409EFF;-webkit-transition: -webkit-transform 1s ease-out;}
.test_btn .el-button.is-round:hover {transform: rotateY(180deg);}
.fixed { position:fixed; top: 0; right:0.3%;}


/*课程实验*/
.experiment{ width: 100%; height: 100vh; margin:0 auto; background-color: #fff; display: flex;display: -webkit-flex;flex-wrap: wrap;}
.exp_fl{ width: 20%; background: #eaf4ff; border-right: 1px solid #fff;}
.exp_lis li{ height: 50px; line-height: 50px; background: #c4e1ff; text-align: center; font-size: 20px; border-bottom: 1px solid #fff; color: #333; cursor: pointer;}
.exp_lis li.on{ background: #76ace5;}
.exp_txt{ padding: 10px; height:calc(100vh - 156px); overflow-y: auto; line-height:2;font-size:12px;}
.exp_txt img{width: 100%;margin: 5px 0;}
.exp_fr {width: 80%;}
.exp_frtit{ width: 100%; height: 50px;line-height: 50px; background: #76ace5; padding:0 25px 0 12px; color: #000;display:flex; justify-content:space-between; }

.exp_main{display:flex;}
.exp_mainl{width:80%;}
.exp_mainr{width:20%;}