body {
    background: url("../img/background.jpg");
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-size: cover;
}

p {
    margin: 20px auto;
    width: 100%;
    font-size: 2.5em;
    text-align: center;
    margin-top: 8%;
    font-weight: bold;
    color: #3c4a9c;
}

#content {
    width: 28%;
    height: 36%;
    background-color: #a9a9a933;
    margin-left: 36%;
    border-radius: 10px;
}

input[type=text], input[type=password], select {
    border: 1px solid #DCDEE0;
    vertical-align: middle;
    border-radius: 3px;
    height: 50px;
    padding: 0px 16px;
    font-size: 14px;
    color: #555555;
    outline: none;
    width: 70%;
    margin-left: 15%;
    margin-bottom: 15px;
    line-height: 50px;
    color: #888;
    border-radius: 5px;
}

input[type=text].reg, input[type=password].reg{
    border: 1px solid #DCDEE0;
    vertical-align: middle;
    border-radius: 3px;
    height: 34px;
    padding: 0px 16px;
    font-size: 14px;
    color: #555555;
    outline: none;
    width: 70%;
    margin-left: 0;
    margin-bottom: 0px;
    line-height: 50px;
    color: #888;
    border-radius: 5px;
}

input[type=text]:focus, input[type=password]:focus, select:focus {
    border: 1px solid #27A9E3;
}

#btnSubmit {
    display: inline-block;
    vertical-align: middle;
    padding: 12px 24px;
    margin-left: 20px;
    font-size: 16px;
    line-height: 24px;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    color: #ffffff;
    background-color: #435cb9;
    border-radius: 3px;
    border: none;
    -webkit-appearance: none;
    outline: none;
    width: 70%;
    margin-top: 5%;
    margin-left: 15%;
    margin-bottom: 8%;
}

#register_btn1{
    margin-left: 65%;
    font-size: 16px;
    border-bottom: 1px solid;
    padding-bottom: 1%;
    text-decoration: none;
}

.icon-user {
    position: absolute;
    left: 0;
    z-index: 5;
    background-image: url("../img/user-icon.png"); /*引入图片图片*/
    background-repeat: no-repeat; /*设置图片不重复*/
    background-position: 0px 0px; /*图片显示的位置*/
    width: 50px; /*设置图片显示的宽*/
    height: 50px; /*图片显示的高*/
}