.banner {
    margin: 90px auto 0;
    text-align: center;
}
.banner section {
    height: 729px;
    padding: 1px 0;
    position: relative;
}
.section_title {
    font-family: PingFangSC-Semibold;
    font-size: 40px;
    color: #4b4b4b;
    line-height: 1;
    margin-top: 55px;
    margin-bottom: 25px;
}
.title_tip {
    font-family: PingFangSC-Light;
    display: inline-block;
    vertical-align: middle;
    font-size: 32px;
    color: #444242;
    line-height: 1;
    padding: 15px 5px;
    border-top: 1px solid #e1e0e0;
    border-bottom: 1px solid #e1e0e0;
}
.content {
    font-size: 26px;
    color: #4b4b4b;
    line-height: 60px;
    margin-top: 20px;
}
.content_a .iconfont {
    font-size: 36px;
    margin-right: 10px;
    width: 36px;
    height: 36px;
    vertical-align: sub;
}
.content .content_a, .content .content_a:hover {
    font-family: PingFangSC-Semibold;
    display: inline-block;
    width: 176px;
    color: #333;
    border: solid 2px #949494;
    border-radius: 4px;
    margin-right: 15px;
    text-align: center;
    transition: all 0.2s ease-in-out;
    position: relative;
}
.content .content_a:hover {
    background: rgba(255, 255, 255, 0.5);
}
.content .content_a .tip {
    display: none;
    position: absolute;
    width: 225px;
    height: 225px;
    left: 50%;
    top: 130%;
    padding: 10px;
    transform: translateX(-50%);
    border: 1px solid #000;
    border-radius: 4px;
    background: #fff;
}
.content .content_a .tip:before {
    content: '';
    display: block;
    position: absolute;
    bottom: 100%;
    left: 50%;
    width: 0;
    height: 0;
    transform: translateX(-50%);
    border: 13px solid transparent;
    border-bottom-color: #000;
    z-index: 1;
}
.content .content_a .tip:after {
    content: '';
    display: block;
    position: absolute;
    bottom: 222px;
    left: 50%;
    width: 0;
    height: 0;
    transform: translateX(-50%);
    border: 13px solid transparent;
    border-bottom-color: #fff;
    z-index: 2;
}
.content .content_a:hover > .tip {
    display: block;
}
.content .content_a .tip img {
    max-height: 204px;
}
.banner .img--wrapper {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
    background: url("//www.d1ev.com/src/app/images/d1ev-bg.png") no-repeat center;
}
.banner .img--wrapper.img-bg2 {
    background: url("//www.d1ev.com/src/app/images/change-bg.png") no-repeat center;
}
.division {
    height: 10px;
    background-color: #f8f8f8;
}