html,body{
    margin: 0px;
    min-width: 1366px;
    position: relative;
}
.mainContent {
    height: 100vh;
    width: 100%;
    text-align: center;
}
.topclass{
    width: 100%;
    height: 70px;
    background-color: white;
}
.img-wrapper{
    padding-top: 15px;
    text-align: left;
}
.topclass_right {
    position: absolute;
    right: 10%;
    width: 100px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    cursor: pointer;
    margin-right: 20px;
    text-decoration: none;
    font-size: 14px;
    color: #666666;
}
.navigation_bg{
    height: calc(100vh - 70px);
    width: 100%;
    position: absolute;
    top: 70px;
    left: 0px;
}

.itemimg{
    /*width: 28px;*/
    height: 28px;
    margin-top: 11px;
    margin-left: 15px;
}
.middlecontent {
    position: relative;
    display: inline-block;;
    text-align: center;
    width: 640px;
    height: 412px;
    background-color: rgba(255,255,255,0.94);
    margin-top: calc((100vh - 482px)/2);
    border-radius: 10px;
}
.middle_title{
    text-align: center;
    height: 28px;
    font-size: 28px;
    color: #fb5f3f;
    margin-top: 30px;
    margin-bottom: 25px;
}
.login_form {
    display: flex;
    flex-direction: column;
    align-items: center;
    /*position: absolute;*/
    /*top: 11%;*/
    width: 100%;
    height: 89%;
}
.login_form_item {
    background-color: white;
    width: 70%;
    margin-bottom: 20px;
    border-radius: 4px;
    overflow: hidden;
    display: flex;
    flex-direction: row;
    height: 60px;
    border: solid 1px #dbdbdb;
}

input{
    border: 0px;outline:none;
    cursor: pointer;
    margin-left: 30px;
    font-size: 24px;
    /*height: 60px;*/
    width: calc(100% - 50px);
}
.login_form_input{
    margin-left: 40px;
    height: 100%;
    width: calc(100% - 40px);
}
.login_btn {
    /*height: 50px;*/
    margin-top: 20px;
    width: 70%;
    cursor: pointer;
    height: 60px;
    line-height: 60px;
    background-color: #fb5f3f;
    border-radius: 4px;
    font-size: 24px;
    color: #ffffff;
}
.black_class{
    /*width: 85px;*/
    height: 15px;
    font-size: 14px;
    color: #1a1a1a;
    cursor: pointer;
}
.orange_class{
    /*width: 56px;*/
    height: 15px;
    font-size: 14px;
    color: #fb5f3f;
    cursor: pointer;

}
.line_class{
    width: 1px;height: 14px;background-color: #949494;margin:3px 10px 0px 10px;
}
.display_flex{
    display: flex;
    flex-direction: row;
}
.lefttitle{
    height: 60px;
    font-size: 18px;
    line-height: 60px;
    color: #525252;
}