.backimg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}
.content {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
}
.kuang {
    background-image: url(../images/login-juxing.png);
    background-size: 100% 100%;
    width: 552px;
    height: 509px;
    padding-top: 33px;
}
.flex4 {
    text-align: center;
}
.logoimg2 {
    width: 106px;
    margin: 10px 0 10px;
}
.xvname {
    font-size: 20px;
    color: #222222;
    font-weight: bold;
}
.tr1 {
    margin: 0 auto 27px;
    width: 415px;
    height: 60px;
    line-height: 60px;
    background-color: #ffffff;
    border-radius: 5px;
    display: flex;
    align-items: center;
}
.tr img {
    width: 15px;
    height: 17px;
    margin-left: 22px;
    margin-right: 18px;
}
.trinput {
    border: 0;
    outline-style: none;
    width: 300px;
}
.tr2 {
    width: 415px;
    height: 60px;
    line-height: 60px;
    margin: 44px auto 10px;
    background-color: #66A0EE;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #FFFFFF;
    cursor: pointer;
}