.help_center{
    width: 100%;
    border-top: 2px solid #F66D0A;
}
.help_center .vessel{
    margin: 0 auto;
    width: 1200px;
    overflow: hidden;
    padding-bottom: 176px;
}
.help_center .vessel .nav,
.help_center .vessel .data{
    float: left;
}
.help_center .vessel .data{
    width: 939px;
    margin-left: 30px;
    padding-top: 50px;
    /*overflow: hidden;*/
}
.help_center .vessel .data .nav{
    font-size: 18px;
    color: #333;
    /*margin: 50px 0 28px;*/
    width: 939px;
    display: block;
    /*margin-bottom: 28px;*/
}
.help_center .vessel .data .nav>b{
    color: #F66D0A;
}

.helpcen{
    padding: 53px 64px;
    margin: 58px 0 38px;
    width: 939px;
    box-sizing: border-box;
    height: 1250px;
    background-color: rgba(255, 255, 255, 1);
    border: solid 1px rgba(220, 220, 220, 1);
}

.helpcen h4{
    text-align: center;
    font-size: 20px;
    font-weight: bold;
}

.helpcen p{
    margin-top: 20px;
    line-height: 26px;
}

.helpcen ul {
    margin-top: 20px;
}

.helpcen ul li{
    margin-bottom: 10px;
}