.relative {
    position: relative;
}

html,
body {
    font-size: 18px !important;
    background: #f1f1f1;
}

.absolute {
    position: absolute;
    width: 100%;
    top: 0;
    left: 0;
}

.fz0 {
    font-size: 0;
}

.jiaoju_dome2 li p {
    margin: 5px 23px;
}

.block {
    display: block;
}

.tac {
    text-align: center;
}

.border {
    border: 1px solid #e5e5e5;
}

.mt20 {
    margin-top: 20px;
}

.pt20 {
    padding-top: 20px;
}

img {
    display: block;
    width: 100%;
    height: 100%;
}

.sidebar-item img {
    width: 28px;
    height: 28px;
}

.mt15 {
    margin-top: 15px;
}

.overflow {
    overflow: hidden;
}

.bgcolor {
    background: #e9f2ff;
}

.bgcolorw {
    background: #e8ebf3;
}

a {
    cursor: pointer;
    transition: padding-left 250ms ease-out;
    /* trans pattern:  property duration timingMethod delay */
}

p {
    text-align: center;
}

.palyx {
    position: relative;
}

.play {
    position: absolute;
    left: 5px;
    /* bottom: 9px; */
    width: 20px;
    height: 20px;
    background: url(../imgs/sas.png) no-repeat center center;
    background-size: 100% 100%;
}

#play_video1,
#play_video2,
#play_video3,
#play_video4 {
    display: inline;
}

#home_video1,
#home_video2,
#home_video3,
#home_video4 {
    width: 288px;
    height: 191px;
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    background: #000;
}


/* 播放按钮 */
.iconw {
    position: relative;
    font-size: 15px;
    margin: 6px 0;
    margin-left: 30px;
    text-align: center;
    text-overflow: ellipsis;
    white-space: normal;
}

.iconw::after {
    content: '';
    position: absolute;
    left: -30px;
    top: -2px;
    width: 25px;
    height: 25px;
    background: url(../images/sas.png) no-repeat center center;
    background-size: 100% 100%;
}






/* li 半圆*/

.listradius li,
.unradius {
    border-radius: 20px;
    background: #fff;
    overflow: hidden;
}

.listradius li p {
    padding: 20px 0;
}

.iddcenter {
    position: relative;
}

/* 证书左右键 */
.Zleft {
    position: absolute;
    left: 0;
    top: 50%;
    opacity: 0.5;
    z-index: 1;
    padding: 10px 0;
    color: #fff;
    background: #959595;
    border-radius: 5px;
    transition: 0.2s;
    transform: translate(0%, -50%);
}

.Zright {
    position: absolute;
    right: 0;
    top: 50%;
    opacity: 0.5;
    font-size: 20px;
    color: #fff;
    background: #959595;
    border-radius: 5px;
    padding: 10px 0;
    z-index: 1;
    transition: 0.2s;
    transform: translate(0%, -50%);
}

.Zright:hover,
.Zleft:hover {
    opacity: 1;
}

/* ul->list==3 的时候 */
.list_3 {
    overflow: hidden;
}

.list_3 li {
    /* width: 502px; */
}

.listradius {
    overflow: hidden;
    display: block;
}

.list_3 li:nth-last-child(3n) {
    margin-left: 0;
}

.list_3 li:nth-last-child(3n-1) {
    margin: 0 46px;
}

.list_3 li:nth-last-child(3n-2) {
    margin-right: 0;
    float: right;
}