/*------------ download ------------*/
.download-list li:nth-child(4n+1) {
    clear: left;
}
.download-list li {
    width: 25%;
    padding: 0 27px 65px;
}
.download-list li .box{
    max-width: 300px;
    margin: 0 auto;
    box-sizing: border-box;
    position: relative;
}
.download-list li .box .cover2{
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    z-index: 30;
    font-size: 0;
}
.download-list .pic {
    position: relative;
}
.download-list .pic:before,
.download-list .pic:after {
    content: "";
    position: absolute;
    width: 0;
    height: 0;
    border-style: solid;
}
.download-list .pic:before {
    border-width: 54px 54px 0 0;
    border-color: #fff transparent transparent transparent;
    top: 0;
    left: 0;
}
.download-list .pic:after {
    bottom: 0;
    right: 0;
    border-width: 0 0 54px 54px;
    border-color: transparent transparent #fff transparent;
}
.download-list .cover {
    position: absolute;
    width: 100%;
    height: 0;
    background: rgba(255, 255, 255, .8);
    opacity: 0;
    transition: all .2s ease-in-out;
}
.download-list .cover i {
    color: #000000;
    font-size: 30px;
    position: absolute;
    top: 0;
    left: 50%;
    margin: -15px 0 0 -14px;
    transition: all .4s ease-in-out;
    opacity: 0;
}
.download-list .box:hover .cover {
    transition: all .2s ease-in-out;
    height: 100%;
    opacity: 1;
}
.download-list .box:hover .cover i {
    transition: all .4s ease-in-out;
    transition-delay: .1s;
    opacity: 1;
    top: 50%;
}
.download-list li .name{
    display: block;
    vertical-align: middle;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #888888;
    font-weight: bold;
    text-align: center;
    line-height: 1.4;
    margin: 10px 0 0 0;
}
/*------------ rwd ------------*/
@media screen and (max-width:1200px) {
    .download-list li {
        padding: 0 15px 65px;
        width: calc((100% / 3) - 0.1px);
    }
    .download-list li:nth-child(3n+1) {
        clear: left;
    }
    .download-list li:nth-child(4n+1) {
        clear: none;
    }
}
@media screen and (max-width: 767px) {
    .download-list li {
        width: 50%;
    }
    .download-list li:nth-child(2n+1) {
        clear: left;
    }
    .download-list li:nth-child(3n+1) {
        clear: none;
    }
}
@media screen and (max-width: 480px) {
    .download-list {
        margin: 0;
    }
    .download-list li {
        width: 100%;
        padding: 0 0 65px;
    }
}