* {
    padding: 0;
    margin: 0;
}

body {
    background-color: #F6F6F6;
}

a {
    text-decoration: none;
    color: #707070;
    text-align: center;
}

ul,
li {
    list-style: none;
}

.command {
    margin: 0 auto;
    width: 1520px;
    height: 45px;
}

.command .index {
    float: left;
    margin-left: 40px;
    /* width: 32px; */
    height: 21px;
    font-size: 16px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    line-height: 45px;
    color: #333333;
    opacity: 1;
}

.command .greater-than-sign {
    float: left;
    margin: 0 16px;
    width: 12px;
    height: 21px;
    font-size: 16px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    line-height: 45px;
    color: #333333;
    opacity: 1;
}

.command .contact-words {
    float: left;
    /* width: 64px; */
    height: 21px;
    font-size: 16px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    line-height: 45px;
    color: #333333;
    opacity: 1;
}

.contact {
    margin: 20px auto;
    width: 1520px;
    /* height: 45px; */
    background: #FFFFFF;
}