.page {
    width:100%;
    height:100vh;
    background:url("../img/page-bg.jpg") center no-repeat;
    background-size:cover;
    position: relative;
}
.page .subject {
    width: 900px;
    height:160px;
    position: absolute;
    bottom:  calc(50% + 60px);
    left: calc(50% - 450px);
}
.page .subject h3 {
    line-height: 160px;
    font-size: 60px;
    text-align: center;
    color: #ffffff;
}
.page .list-nav {
    width: 900px;
    height: 160px;
    bottom:  calc(50% - 80px);
    left: calc(50% - 450px);
    position: absolute;
    z-index: 10;
    margin: -10px;
}
.page .list-nav .item {
    box-sizing: border-box;
    width: 280px;
    height: 140px;
    background-color: #00a65a;
    border-radius: 8px;
    margin: 10px;
    display: -webkit-inline-box;
    display: -ms-inline-flexbox;
    display: inline-flex;
    float: left;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    padding-left: 40px;
    cursor: pointer;
    -webkit-transition: background-color .4s;
    transition: background-color .4s;
}
.page .list-nav .item:hover {
    background-color: #2bbb6a;
}
.page .list-nav .item .icon {
    margin-right: 20px;
}
.page .list-nav .item .title {
    font-size: 24px;
    color: #fff;
}