* {
    margin: 0;
    padding: 0;
    list-style: none;
    text-decoration: none;
}
body{
	background-color: #252525;	
	
}

.clearfix:after {
    content: ".";
    display: block;
    clear: both;
    visibility: hidden;
    line-height: 0;
    height: 0;
    font-size: 0;
}

.clearfix {
    *zoom: 1;
}
.Coolteacher{
    width: 1200px;
    margin: 0 auto;
    position: relative;
}
.Cooldog_container {
    width: 1092px;
    height: 380px;
    margin: 0px auto;
    position: relative;
    overflow: hidden;
}

.Cooldog_container .Cooldog_content {
    position: absolute;
    width: 874px;
    height: 256px;
    bottom: 10px;
    left: 50%;
    margin-left: -437px;
}

.Cooldog_container .Cooldog_content li {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 256px;
    transition: all 0.3s ease;
}

.Coolteacher .btn_left, .Coolteacher .btn_right {
    /*display: none;*/
    position: absolute;
    top: 50%;
    margin-top: 35px;
    z-index: 50;
    color: #fff;
    line-height: 179px;
}

.Coolteacher .btn_left {
    text-align: left;
    left: 0;
}

.Coolteacher .btn_right {
    text-align: right;
    right: 0;
}

.Cooldog_container i {
    font-size: 50px;
}

.Cooldog_container .btn_close {
    position: absolute;
    top: 0;
    right: 0;
    width: 20px;
    height: 20px;
    display: none;
    line-height: 20px;
    text-align: center;
    background-color: #BCB9B9;
    color: #fff;
}

.Cooldog_container .btn_close i {
    font-size: 18px;
}

.Cooldog_container .buttons {
    width: 370px;
    height: 5px;
    line-height: 5px;
    position: absolute;
    bottom: 5px;
    left: 50%;
    margin-left: -185px;
    z-index: 80;
}

.Cooldog_container .buttons a {
    float: left;
    width: 40px;
    height: 5px;
    background-color: #898F94;
    margin-right: 15px;
}

.Cooldog_container .buttons a.color {
    background-color: #92ffff;
}

.Cooldog_container .buttons a:last-child {
    margin-right: 0;
}

.p1 {
    transform: translate3d(-577px, 0, 0) scale(0.81);
    opacity: 0.4;
    z-index: 1;
}

.p2 {
    transform: translate3d(-325px, 0, 0) scale(0.81);
    transform-origin: 0 50%;
    opacity: 0.6;
    z-index: 2;
}

.p3 {
    transform: translate3d(-109px, 0, 0) scale(0.81);
    transform-origin: 0 50%;
    opacity: 0.8;
    z-index: 3;
}

.p4 {
    transform: translate3d(0px, 0, 0) scale(1);
    opacity: 1;
    z-index: 4;
}

.p5 {
    transform: translate3d(275px, 0, 0) scale(0.81);
    transform-origin: 0 50%;
    opacity: 0.8;
    z-index: 3;
}

.p6 {
    transform: translate3d(480px, 0, 0) scale(0.81);
    transform-origin: 0 50%;
    opacity: 0.6;
    z-index: 2;
}

.p7 {
    transform: translate3d(680px, 0, 0) scale(0.81);
    transform-origin: 0 50%;
    opacity: 0.4;
    z-index: 1;
}
.p8 {
    transform: translate3d(880px, 0, 0) scale(0.81);
    transform-origin: 0 50%;
    opacity: 0.4;
    z-index: 1;
}
.first_rgba{
    width: 874px !important;
    height: 210px !important;
    background: rgba(255,255,255,.5);
    position: absolute;
    left: 50%;
    margin-left: -437px;
    bottom: 0;
    border-radius: 10px;
    box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    border-radius: 5px;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
}
.first_rgba .second_rgba{
    width: 854px !important;
    height: 190px !important;
    background: #fff;
    position: absolute;
    left: 50%;
    margin-left: -427px;
    bottom: 10px;
    border-radius: 10px;
     box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    padding: 20px 30px;
}
.first_rgba .second_rgba h6{
    font-size: 20px;
    color: #333;
    font-weight: bold;
}
.first_rgba .second_rgba p{
    width: 540px;
    font-size: 18px;
    color: #666;
    line-height: 34px;
    letter-spacing: 1.5px;
    margin-top: 10px;
    overflow:hidden; 
    text-overflow:ellipsis;
    display:-webkit-box; 
    -webkit-box-orient:vertical;
    -webkit-line-clamp:3; 
}
.first_rgba .second_rgba img{
    position: absolute;
    right: 0;
    bottom: 0;
}
.first_rgba .second_rgba p:nth-child(3){
    width: 420px;
    font-size: 18px;
    color: #666;
    line-height: 34px;
    letter-spacing: 2px;
    overflow:hidden; 
    text-overflow:ellipsis;
    display:-webkit-box; 
    -webkit-box-orient:vertical;
    -webkit-line-clamp:1; 
    position: relative;
    margin-top: 0;
}
.first_rgba .second_rgba a{
    position: absolute;
    line-height: 28px;
    top: 0;
    left: 447px;
    font-size: 18px;
    top: 126.5px;
}
.first_rgba .second_rgba a:hover{
    color: #bd0008;
}
.first_rgba .teacher_intro{
    position: absolute;
    top: -50px;
    left: 40px;
    display: none;
}
.first_rgba .teacher_intro p{
    float: left;
    margin: 0;
}
.first_rgba .teacher_intro p:nth-child(1){
    font-size: 36px;
    color: #fff;
}
.first_rgba .teacher_intro p:nth-child(2){
    font-size: 15px;
    color: #fff;
    margin-left: 10px;
    line-height: 22px;
}