* {
    margin: 0;
    pad: 0;
}

html,
body {
    width: 100%;
    height: 100%;
}

header {
    width: 1300px;
    /* height: 100px; */
    height: 10vh;
    margin: 0 auto;
}

header .logo {
    /* margin-left: 40px; */
    margin-top: 10px;
    height: 7vh;
}
.main{
    width: 100%;
    height: 90vh;
    background: url('../images/BG2.png') no-repeat;
    background-size: cover;
    position: relative;
    width: 100%;
}
.center{
    position: absolute;
    width: 900px;
    height: 485px;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    background: url('../images/denglu.png') no-repeat;
    background-size: cover;
}

.main .center .login {
    width: 900px;
}

.main .center .user {
    position: absolute;
    width: 314px;
    height: 475px;
    top: 0;
    right: 0;
}


.main .center .user input:nth-of-type(1) {
    width: 200px;
    height: 25px;
    background-color: #ffffff;
    border: none;
    outline: none;
    display: inline-block;
    position: absolute;
    top: 183px;
}
.main .center .user input:nth-of-type(2){
    width: 200px;
    height: 25px;
    border: none;
    outline: none;
    display: inline-block;
    position: absolute;
    top: 230px;
}
.main .center .user .codeIpt {
    width: 250px;
    height: 40px;

    margin-bottom: 20px;
    margin-left: 33px;
    display: inline-block;
}

.main .center .user input:nth-of-type(3) {
    width: 100px;
    height: 20px;
    background-color: #ffffff;
    border: none;
    outline: none;
    display: inline-block;
    position: absolute;
    top: 280px;
}

.main .center .login  {
    width: 250px;
    height: 35px;
    background: url('../images/login-19.png') no-repeat;
    background-size: cover;
    position: absolute;
    top: 342px;
    right: 100px;
}
.main .center .login:hover{
    background: url('../images/login-20.png') no-repeat;
    background-size: cover;
}