body, html {
    margin: 5px;
    padding: 5px;
    height: 100%;
}

body {
    background-image: url(../images/bg001.jpg);/* 替换为你的图片路径 */
    background-position: center center; /* 图片居中 */
    background-repeat: no-repeat; /* 不重复 */
    background-attachment: fixed; /* 背景固定，不随内容滚动 */
    background-size: cover; /* 图片铺满整个背景 */
}

#login {
    width: 450px;
    height: 450px;
    border-radius: 15px;
    background: transparent;
    margin: 0px auto;
    margin-top: 180px;
    border: 1px solid white;
}

#login #top {
    width: 420px;
    height: 60px;
    line-height: 60px;
    /*border: 1px solid red;*/
    margin: 0px auto;
    margin-top: 65px;
}

#login #top img {
    margin-left: 90px;
    margin-top: -20px;
    float: left;
}

#login #top span {
    font-size: 20px;
    font-weight: bold;
    font-family: Consolas, serif;
}

#login #bottom {
    width: 420px;
    height: 205px;
    /*border: 1px solid red;*/
    margin: 0px auto;
    margin-top: 10px;
    padding: 20px;
}

.form-group{
    padding: 5px 5px;
}

.col-sm-6,.col-sm-2{
    margin-left: 40px;
}

.btn{
    margin-left: 80px;
}

#regist{
    text-align: center;
}

strong{
    display: block;
    color: red;
    margin: 20px auto 0;
    text-align: center;
}