*{
    margin: 0;
    padding: 0;
}
html,body,div.index{
    height:100vh;
}
body{
    overflow:hidden;
}
.nav{
    position: fixed;
    z-index: 1;
    background-color: rgba(0, 0, 0, 0.5);
    width: 100%;
    height: 70px;
    font-size: 18px;
    z-index: 200;
}
.nav-menu{
    float: right;
}
.nav-nav{
    float: left;
}
.nav-nav li{
    float: left;
    width: 160px;
    height: 70px;
    line-height: 70px;
    text-align: center;
}
.nav-nav li a{
    display: inline-block;

}
.nav-nav li a div{
    width: 110px;
    height: 20px;
    overflow: hidden;
}
.nav-nav-item span{
    display: block;
    height: 24px;
    line-height: 24px;
}
.nav-nav-item span:first-child{
    color: #fff;
}
.nav-nav-item span:last-child{
    color: #3755D3;
    font-size: 20px;
    font-weight: 600;
}
.nav-nav-item{
    transition: all 0.5s ease;
    -moz-transition: all 0.5s ease; /* Firefox 4 */
    -webkit-transition: all 0.5s ease; /* Safari and Chrome */
    -o-transition: all 0.5s ease; /* Opera */
}
.nav-nav li:hover .nav-nav-item{
    margin-top: -24px;
}
.nav-nav li:nth-child(4) .nav-nav-item{
    margin-top: -24px;
}
.dropdown{
    display: none;
    background-color: rgba(0, 0, 0, 0.5);
    min-width: 180px;
}
.dropdown a{
    width: 180px;
    color: #fff;
    font-size: 16px;
}
.dropdown a:hover{
    background-color: rgba(255, 255, 255, 0.5);
    color: #3755D3;
    font-weight: 600;
}
.drop:hover .dropdown{
    display: block;
}

#solution{
    width: 100%;
	height: 100vh;
}
.solutionSection1{
    width: 100%;
    height: 100vh;
    background:url(../img/solution/background.jpg) center top /cover;
}
.solutionTitle{
    position: absolute;
    margin-top: 100px;
    margin-left: 5%;
    font-size: 2.5vw;
    color:rgb(55, 85, 211)
}
.solutionContent{
    position: absolute;
    width: 90%;
    height: 50vh;
    margin-top: 25vh;
    margin-left: 5%;
    justify-content: space-between;
    display: flex;
}
.solution-list{
    width: 25%;
    height: 50vh;
    background-color: #fff;
    box-shadow: 10px 10px 5px -4px rgba(114, 113, 119, 0.3); 
    text-align: center;
    display: flex;
}

.solution-list img{
    width: 100%;
    height: 26vh;
}
.solution-text{
    position: absolute;
    width: 25%;
    margin-top: 30vh;
    font-size: 1.2vw;
}
.solution-btn{
    background-color: rgb(55, 85, 211);
    border-radius: 10px;
    position: absolute;
    /* height: 4vh; */
    margin-top: 40vh;
    margin-left: 15%;
    align-items: center;
    display: flex;
}
.solution-btn a{
    font-size: 0.9vw;
    color: #fff;
    margin: 10px;
}
.Scroll{
    width: 17px;
    height: 155px;
    position: fixed;
    left: 30px;
    top: 50%;
    margin-top: -77px;
}
.Scroll li{
    list-style: none;
    width: 12px;
    height: 12px;
    border: 1px solid #fff;
    border-radius: 8px;
    margin-top: 5px;
}
.Scroll li.on{
    background-color: #FFFFFF;
}