#navbar .nav-menu:first-child{
    padding-left: 0;
}
.through_img{
    width: 100%;
    height: 260px;
    background-image: url(../images/825381d857ba1493.jpg);
    background-position: center center;
}
.through_img>div{
    position: relative;
    height: 100%;
}
.through_img p{
    position: absolute;
    left: 0;
    top: 32px;
}
.through_img p,.through_img p a{
    font-size: 14px;
    color: #fff;
}
.through_img h3{
    text-align: center;
    color: #fff;
    font-size: 36px;
    font-weight: bold;
    height: 260px;
    line-height: 260px;
}
.main_content{
    padding-top: 60px;
}
.main_content>h3{
    position: relative;
    font-size: 32px;
    color: #333;
    height: 36px;
    line-height: 36px;
    margin-top: 80px;
    font-weight: bold;
}
.main_content>h3:first-child{
    margin-top: 0;
}
.main_content>h3::before{
    content: "";
    width: 2.1em;
    height: 15px;
    background-color: #7fb6a1;
    position: absolute;
    left: 0;
    bottom: 0;
    z-index: -1;
}



/* 内科学 */
.main_content>ul{
    width: 1220px;
    margin-left: -20px;
    margin-top: 15px;
}
.main_content>ul li{
    width: 285px;
    height: 520px;
    float: left;
    margin-left: 20px;
}
.main_content>ul li a{
    display: block;
    width: 100%;
    height: 100%;
}
.main_content .doctor_imgbox{
    width: 285px;
    height: 356px;
    position: relative;
}
.main_content .doctor_imgbox>img{
    position: absolute;
    left: 0;
    top: 0;
    width: 285px;
    height: 356px;
}
.doctor_imgbox .mask{
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);

    display: none;
}
/* .doctor_imgbox .mask>img{
    position: absolute;
    left: 13px;
    top: 14px;
} */
.doctor_imgbox .mask i{
    display: block;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}
.doctor_imgbox .mask .bt::before{
    content: "";
    display: block;
    box-sizing: border-box;
    width: 20px;
    height: 20px;
    border-left: 1px solid #f0f0f0;
    border-top: 1px solid #f0f0f0;
    position: absolute;
    left: 14px;
    top: 14px;
    transform: translate(-50px,-50px);
    transition: all 0.5s;
}
.doctor_imgbox .mask .bt::after{
    content: "";
    display: block;
    box-sizing: border-box;
    width: 20px;
    height: 20px;
    border-right: 1px solid #f0f0f0;
    border-top: 1px solid #f0f0f0;
    position: absolute;
    right: 14px;
    top: 14px;
    transition: all 0.5s;
    transform: translate(50px,-50px);
}
.doctor_imgbox .mask .bb::before{
    content: "";
    display: block;
    box-sizing: border-box;
    width: 20px;
    height: 20px;
    border-left: 1px solid #f0f0f0;
    border-bottom: 1px solid #f0f0f0;
    position: absolute;
    left: 14px;
    bottom: 14px;
    transition: all 0.5s;
    transform: translate(-50px,50px);
}
.doctor_imgbox .mask .bb::after{
    content: "";
    display: block;
    box-sizing: border-box;
    width: 20px;
    height: 20px;
    border-right: 1px solid #f0f0f0;
    border-bottom: 1px solid #f0f0f0;
    position: absolute;
    right: 14px;
    bottom: 14px;
    transition: all 0.5s;
    transform: translate(50px,50px);
}


.doctor_imgbox .mask h5{
    display: block;
    margin-top: 100px;
    padding: 40px;
    color: #fff;
    font-size: 18px;
    padding-bottom: 20px;
    text-align: center;
}
.doctor_imgbox .mask h5::before{
    content: "";
    display: block;
    /* width: 50%; */
    width: 0;
    height: 1px;
    position: absolute;
    left: 50%;
    bottom: 0;
    background-color: #fff;
    transform: translateX(-50%);
    transition: all 0.5s;
}
.doctor_imgbox .mask p{
    position: absolute;
    left: 0;
    top: 200px;
    color: #fff;
    width: 100%;
    padding: 0 26px;
    text-align: center;
    font-size: 16px;
    line-height: 30px;
  height: 60px;    
  overflow: hidden;
    text-overflow: ellipsis;
    -webkit-box-orient: vertical;
    -webkit-line-clamp:2;
    display: -webkit-box;
}
.doctor_imgbox .mask span{
    display: block;
    box-sizing: border-box;
    border: 1px solid #fff;
    position: absolute;
    left: 50%;
    top: 284px;
    transform: translateX(-50%);
    color: #fff;
    text-align: center;
    font-size: 12px;
    line-height: 1;
    padding:8px 10px;
}

.main_content li .doctor_imgbox:hover .mask{
    display: block;
}
.doctor_imgbox .mask:hover h5::before{
    width: 50%;
}
.doctor_imgbox .mask:hover .bt::before,
.doctor_imgbox .mask:hover .bt::after,
.doctor_imgbox .mask:hover .bb::before,
.doctor_imgbox .mask:hover .bb::after
{
   transform: translate(0,0); 
}


.main_content>ul a>h4{
    font-size: 24px;
    line-height: 30px;
    color: #4b9a7b;
    text-align: center;
    margin-top: 24px;
}
.main_content>ul a>p{
    font-size: 14px;
    line-height: 25px;
    color: #333;
    text-align: center;
    margin-top: 10px;
}

/* .main_content>ul li:hover{
    background-color: #4b9a7b;
} */

.videobox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
}
.videobox video {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 800px;
    margin-left: -400px;
    margin-top: -200px;
}
.showvideo_btn{
    cursor:pointer;
    text-decoration: underline;
    font-size: 18px;
}
.btn_close{
    position: absolute;
    right: 80px;
    top: 150px;
}


/*移动端*/
@media screen and (max-width: 768px){
.through_img {
    width: 100%;
    height: 3rem;
    /* background-image: url(../images/common/banner_green.png); */
    background-image: url(../images/825381d857ba1493.jpg);
    background-repeat: repeat;
    background-position: center center;
}
.through_img p, .through_img p a {
    font-size: 0.2rem;
    color: #fff;
}
.through_img p {
    position: absolute;
    left: 0.24rem;
    top: 0.3rem;
}
.centerArea {
    width: 100%;
    margin:0 auto;
}
.through_img h3 {
    text-align: center;
    color: #fff;
    width: 100%;
    text-align: center;
    font-size: 0.36rem;
    font-weight: bold;
    height: 3rem;
    line-height: 3rem;
}
.main_content {
    width: calc(100% - 0.48rem)!important;
    padding-top: 0.4rem;
}
.main_content h3 {
    position: relative;
    color: #555;
    height: 0.55rem;
    line-height: 0.55rem;
    font-size: 0.4rem!important;
    font-weight: bolder!important;
    margin-top: 0.5rem;
}
.main_content h3::before {
    content: "";
    width: 2.1em;
    height: 0.25rem;
    background-color: #7fb6a1;
    position: absolute;
    left: 0;
    bottom: 0;
    z-index: -1;
}
.main_content>ul {
    width: 100%;
    margin-left: 0;
    margin-top: 0.4rem;
    display: flex;
    flex-wrap: wrap;
}
.main_content>ul span{
    width: 100%;
    display: flex!important;
    flex-wrap: wrap;
}
.main_content>ul li {
    width: 3.26rem;
    min-height: 4.5rem;
    height: auto;
    float: unset;
    margin-left: 0;
    margin-bottom: 0;
    margin: 0.12rem;
}
.main_content>ul li a {
    display: block;
    width: 100%;
    height: auto;
}
.main_content .doctor_imgbox {
    width: 100%;
    height: 100%;
    position: relative;
    top: 0;
}
.main_content .doctor_imgbox>img {
    position: absolute;
    left: 0.4rem;
    top: 0;
    width: 2.46rem;
    height: 3.2rem;
}
.doctor_imgbox .mask {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: none;
    opacity: 0;
}
.main_content>ul a>h4 {
    font-size: 0.35rem;
    line-height: 1;
    color: #4b9a7b;
    text-align: center;
    margin-top: 0rem;
    padding-top: 3.5rem;
}
.main_content>ul a>p {
    font-size: 0.25rem;
    line-height: 1.5;
    color: #333;
    text-align: center;
    margin-top: 0.1rem;
}
.videobox video {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 7rem;
    margin-left: -3.5rem;
    margin-top: -2rem;
}
.btn_close {
    position: absolute;
    right: 0.5rem;
    top: calc(50% - 3rem);
}
.showvideo_btn {
    cursor: pointer;
    text-decoration: underline;
    font-size: 0.25rem;
}


}