.banner{position:relative;}
.banner-title {
    position: absolute;
    left: 50%;
    top: 50%;
    text-align: center;
    transform: translate(-50%,-50%);
    color: #fff;
}
.engTitle {
    font-size: 1.25rem;
    text-transform: uppercase;
    line-height: 1.2;
    position: relative;
    z-index: 1;
}
.chTitle {
    font-weight: bold;
    font-size: 2.75rem;
}
.introduct {
    font-size: 6rem;
    font-weight: bold
}
.desc {
    font-size: 1rem;
    margin-top: 2rem;
}
.content {
    background: #f2f2f2;
    width:66.666%;
    margin: -6% auto 0;
    position: relative;
    z-index: 1;
    padding: 6rem 8.333%;
    display:flex;
    justify-content:space-between;
}
.content dd{
    font-weight: bold;
    font-size: 1.25rem;
    margin-top:.5rem
}
.post{margin:10rem 25%}
.item{border-bottom:1px dashed #000;margin-top:4rem}
.item-head {
    display: flex;
    justify-content: space-between;
    padding: 1rem 0;
    cursor:pointer;
}
.item-detail {
    margin: 3rem 0;
    display:none
}
.requirement{display:flex;}
.requirement p{width:50%;}
.item p{font-size:1.25rem}
.item-head strong {
    font-size: 1.5rem;
    margin-left: 1.5rem;
}
.close,.item-head.active .open{display:none}
.arrow {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-left: 1px solid;
    border-bottom: 1px solid;
    position: relative;
    transform: rotate(-45deg);
    cursor: pointer;
    margin-left: 10px;
    margin-bottom: 3px;
}
.item-head.active .arrow{transform:rotate(135deg);}
.item-head.active .close {
    display:inline-block
}
.post-sub{color:#9b9b9b}