.layui-nav-tree .layui-nav-itemed:after {
    background-color: #316ccb;
}

.layui-nav-tree .layui-nav-item a:hover {
    background-color: #4E5465;
}

.layui-nav-tree .layui-this,
.layui-nav-tree .layui-this>a,
.layui-nav-tree .layui-this>a:hover,
.layui-nav-tree .layui-nav-child dd.layui-this,
.layui-nav-tree .layui-nav-child dd.layui-this a {
    background-color: #316ccb;
    color: #fff;
}

.layui-nav-tree .layui-nav-title a,
.layui-nav-tree .layui-nav-title a:hover,
.layui-nav-itemed>a {
    color: #fff !important;
}

.layui-nav-tree .layui-nav-bar {
    background-color: #316ccb;
}

.layui-nav-tree .layui-nav-child a {
    color: #fff;
    color: rgba(255, 255, 255, .7);
}

.layui-nav-tree .layui-nav-child a:hover,
.layui-nav-tree .layui-nav-child {
    background: none;
    color: #fff;
}

.pic-wrap .pic {
    height: 265px;
}

.product-title {
    margin: 30px 0;
}

#test1 {
    text-align: center;
    margin-top: 40px;
}

.pic-wrap {
    position: relative;
    overflow: hidden;
}

.pic-wrap:hover .mark {
    top: 0;
    margin-top: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 0;
}

.mark {
    position: absolute;
    left: 0;
    top: 100%;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .6);
    color: #fff;
    transition: all .4s;
    text-align: center;
    margin-top: -40px;
    border-top-left-radius: 50% 8%;
    border-top-right-radius: 50% 8%;
    padding: 10px;
    box-sizing: border-box;
}

.mark .title {
    font-size: 16px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.pic-wrap:hover .mark .title {
    font-size: 20px;
    overflow: visible;
    white-space: normal;
    word-wrap: break-word;
}

.mark .title-en {
    font-size: 16px;
}

.mark .layui-btn {
    font-size: 16px;
    background: rgba(49, 108, 203, .8);
    margin-top: 30px;
}

img {
    width: 100%;
}

.epidemic-materials .contact {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
}

.epidemic-materials .contact .tel {
    font-size: 26px;
    color: #666;
    margin-top: 30px;
}

.epidemic-materials .contact .tel::before {
    content: "";
    display: inline-block;
    width: 38px;
    height: 36px;
    background: url(../../img/materials/tel.png) no-repeat;
    background-size: 100%;
    vertical-align: middle;
    margin-right: 5px;
}

.contact .layui-btn {
    width: 226px;
    font-size: 18px;
    border-radius: 5px;
    padding: 0;
}

.contact div+div {
    margin-top: 26px;
}

.contact .layui-icon-login-qq {
    font-size: 24px;
    vertical-align: middle;
    margin-right: 7px;
}

.footer {
    margin-top: 40px;
}

@media screen and (max-width:768px) {
    .layui-nav-tree {
        display: none;
    }
    .mark {
        opacity: 1;
        background: rgba(0, 0, 0, 0.1);
    }
    .product-title .headling-h1 {
        font-size: 20px;
    }
}