.mainbg {
    height: 774px;
    background: url('../images/subbg.jpg') center top no-repeat;
}

.menu {
    padding-top: 107px;
    font-size: 0;
    -webkit-text-size-adjust: none;
    text-align: center;
}

.menu>ul {
    display: inline-block;
}

.menu-list {
    display: inline-block;
    width: 282px;
    height: 419px;
    margin: 0 12px;
    vertical-align: top;
}

.menu-list.list1 {
    background: url('../images/menubg1.png') no-repeat;
}

.menu-list.list2 {
    background: url('../images/menubg2.png') no-repeat;
}

.menu-list.list3 {
    background: url('../images/menubg3.png') no-repeat;
}

.menu-list.list4 {
    background: url('../images/menubg4.png') no-repeat;
}


.menu-list a {
    display: block;
    padding-top: 30px;
    height: 389px;
}

.menu-title {
    line-height: 40px;
    text-align: center;
    font-family: 'SourceHanSansCN-Bold';
    font-size: 28px;
    color: #ffffff;
    text-transform: uppercase;
}

.menu-list.list2 .menu-title span {
    color: #a2ffbe;
}

.menu-list.list3 .menu-title span {
    color: #93f6ff;
}

.menu-list.list4 .menu-title span {
    color: #ffd875;
}

.deatil {
    text-align: left;
    padding: 25px 0 0 30px;
    line-height: 34px;
    font-size: 16px;
    color: #ffffff;
}

.deatil h2 {
    font-size: 20px;
}

.deatil p {
    position: relative;
    padding-left: 14px;
}

.deatil p::before {
    position: absolute;
    content: '';
    width: 4px;
    height: 4px;
    background-color: #fff;
    border-radius: 1px;
    left: 6px;
    top: 50%;
    margin-top: -2px;
}

.deatil p span {
    font-size: 14px;
    color: #a3cafc;
}

.code { 
    width: 136px;
    height: 136px;
    margin: 18px auto 0;
    background: url('../images/codebg.png');
    box-shadow: 0px 3px 7px 0px rgba(7, 89, 194, 0.33);
    overflow: hidden;
}

.code-img {
    display: block;
    width: 105px;
    height: 105px;
    margin: 15px auto 0;
}