/*css*/@media screen and (max-width:1341px) {
.news-bottom-box .left-box {
    width: 100%;
    position: relative;}
}
    .tr a:nth-child(2n){    
    margin-left: 20px;}
 
.study_ul>.tr>a{font-size:18px;}
.ks {
    position: relative;
    width: 38%;
    display: block;
    height: 32px;
    margin-bottom: 30px !important;
    text-align: center;
    line-height: 26px;
    float: left;

    color: #4c4b4b;
    text-decoration: none;

    font-size: 20px;
    padding: 0 28px;
    text-transform: uppercase;
    transition: 0.5s;
    overflow: hidden;}
   .tr a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    border-top: 2px solid #d41a16;
    border-left: 2px solid #d41a16;
    transition: 0.5s;
    transition-delay: 0.5s;}
.tr a::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 20px;
    height: 20px;
    border-bottom: 2px solid #d41a16;
    border-right: 2px solid #d41a16;
    transition: 0.5s;
    transition-delay: 0.5s;}
@media screen and (max-width: 640px){
 .ks {

    width: 27%;}

}