body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.contact-bg {

    width: 100%;
height:620px;
    overflow: hidden;
    background-size:100%;
}

.contact-top {
    width: 100%;
    height: 90px;
    background-color: black;
}

.contact-main {
    margin-top: 70px;
    width: 100%;
    height: 480px;
}

.contact-main-left {
    width: 45%;
    float: left;

}

.contact-main-left-top {
    margin: 0 auto;
    text-align: left;
    width: 80%;
    height: 110px;
    border-bottom: 2px solid black;
    font-size: 25px;
    color: black;
    font-family: "微软雅黑";
}

.contact-main-left-down {
    margin-top: 30px;
    margin-left: 10%;
    text-align: left;
    width: 80%;
    font-size: 20px;
    color: black;
    font-family: "微软雅黑";
}

.contact-main-right {
    width: 55%;
    float: left;
    margin-top:45px;
}