.clearfix::after{content:"";display:block;clear:both;height:0;line-height:0;visibility:hidden;}
.down {
    width: 1200px;
    overflow: hidden;
    margin:80px auto;
}
.down ul {
    position: relative;
}
.down ul li {
    width: 349px;
    height: 258px;
    border: 1px solid #bfbfbf;
   /* background: url(../images/ico_down.jpg) center 0px no-repeat #f8f8f8;*/
    border-radius: 15px;
    float: left;
    margin-right: 49px;
    margin-bottom: 49px;
}
.down ul li span {
    display: block;
    width: 100%;
    font-size: 18px;
    color: #333;
    text-align: center;
    margin-top: 140px;
}
.down ul li a {
    display: block;
    width: 125px;
    height: 35px;
    background-color: #4dbbaa;
    text-align: center;
    line-height: 35px;
    font-size: 16px;
    color: #fff;
    margin: auto;
    border-radius: 12px;
    margin-top: 200px;
}