css

*{
    margin:0px;
    padding:0px;
}
html,body{
    width:100%;
    height:100%;
    /*background:url(500477250.jpg) no-repeat;*/
    background-color: #0000bf;
    background-size: 100% 100%;
}
#div{
    height:calc(100% - 100px);
    width:calc(100% - 100px);
    /*background:#069;*/
    padding-left:100px;
    position:absolute;
    top:100px;
}
.img_div{
    width:100%;
    height:15%;
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: column;
    flex-direction: column;
}
.div_1{
    float:left;
    width:120px;
    height:100%;
}
.img_div2{
    width:auto;
    height:auto;
    margin: auto;
    cursor: pointer;
}
img{
    width:50px;
    height:50px;
    display:block;
    margin:auto;
}
.title_text{
    width:100%;
    text-align:center;
    color: snow;
}
#content{
    width: 100%;
    height: 100%;
    display: none;
}
#tab{
    width: 100%;
    height: 90%;
    display: none;
}