body {
    width: 100%;
    height: 100%;
    display: block;
    position: absolute;
    margin: 0;
    padding: 0
}

.left_div {
    position: relative;
    width: 500px;
    height: 100%;
    text-align: center;
    float: left;
    overflow: auto
}

.left_body {
    display: table;
    height: 100%;
    width: 100%
}

.left_body_core {
    display: table-cell;
    vertical-align: middle;
    height: 100%
}

.left_div .logo {
    position: relative;
    cursor: pointer
}

.right_div {
    position: relative;
    width: calc(100% - 500px);
    height: 100%;
    float: left;
    background-repeat: no-repeat;
    background-size: 100% 100%;
    background-position: center
}

#form_div {
    background-image: url(images/bg_form.png);
    background-repeat: no-repeat;
    background-size: 520px;
    position: relative;
    width: 100%;
    height: 520px;
    overflow: auto
}

#form_div form {
    margin: 70px 80px 0 80px
}

#form_div label {
    display: block;
    text-align: left;
    font-family: arial;
    font-size: 15px;
    color: #646464;
    width: 300px;
    padding-left: 15px
}

#form_div input[type=text],#form_div input[type=password] {
    border-bottom: solid 2px #f2f2f2;
    border-top: 0;
    border-left: 0;
    border-right: 0;
    width: 300px;
    line-height: 40px;
    margin: 20px 0 30px 0;
    font-size: 14px;
    padding-left: 10px
}

#form_div select {
    border: 1px solid #36a9e1;
    border-radius: 4px;
    width: 300px;
    height: 40px;
    background-color: transparent;
    padding: 0;
    margin: 0;
    color: gray;
    cursor: pointer;
    font-size: 15px;
    padding-left: 10px
}

#form_div #submit_bt {
    overflow: visible;
    width: 145px;
    height: 48px;
    position: relative;
    margin-top: 40px;
    cursor: pointer
}