.custom_banner{
    height: 360px;
    background: url(img/help_banner.jpg) no-repeat center;
    padding-top: 80px
}
.custom_banner .custom_main {
    width: 1200px;
    height: 100%;
    margin: auto;
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}
.custom_main img{
    width: 200px;
    position: absolute;
    left: 800px;
    top: 36px;
}
.custom_banner .custom_main h3 {
    font-size: 36px;
    font-weight: 500;
    height: 110px;
    line-height: 110px;
}
.custom{
    padding: 0 40px 60px 40px;
    width: 560px;
    background-color: #ffffff;
    box-shadow: 0px 4px 20px 0px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    margin: 60px auto;
}
.custom_box_t{
    font-size: 24px;
    font-weight: 600;
    padding: 30px 0 20px 0;
    border-bottom: 1px solid #eee;
    margin-bottom: 30px;
}
.custom_box_d{
    margin-bottom: 30px;
}
.custom_box_left{
    float: left;
    line-height: 40px;
    width: 130px;
    font-size: 16px;
    font-weight: 500;
}
.custom_box_choose{
    width: calc(100% - 130px);
    float: right;
    text-align: center;
}
.custom_box_choose>a.active{
    color: #3355db;
    border-color: #3355db;
    background: #f4f7ff;
    font-weight: 500;
}
.custom_box_choose>a {
    float: left;
    margin-right: 6px;
    margin-bottom: 10px;
    font-size: 14px;
    color: #808191;
    width: 110px;
    line-height: 40px;
    background-color: #fbfbfc;
    border-radius: 4px;
    border: solid 1px #eeeeee;
}
.custom_box_input {
    float: right;
    width: calc(100% - 130px);
    height: 40px;
    background-color: #fbfbfc;
    border-radius: 4px;
    border: solid 1px #eeeeee;
    position: relative;
}
.custom_box_input .img{
    position: absolute;
    right: 0px;
    top: 0px;
    border: 1px solid #cccccc;
    height: 38px;
    cursor: pointer;
}
.clearfix:after {
    content: ".";
    display: block;
    height: 0;
    clear: both;
    visibility: hidden;
}
.custom_box_input>input {
    height: 100%;
    width: 100%;
    background: none;
    border: none;
    padding: 0 15px;
    font-size: 14px;
}
.custom_box_txt {
    float: right;
    width: calc(100% - 130px);
    height: 100px;
    background-color: #fbfbfc;
    border-radius: 4px;
    border: solid 1px #eeeeee;
}
.custom_box_txt>textarea {
    width: 100%;
    height: 100%;
    border: none;
    font-size: 14px;
    padding: 10px 15px;
    background: none;
}
.custom_btn {
    width: 100%;
    display: block;
    line-height: 48px;
    color: #fff;
    font-size: 18px;
    background-color: #3355db;
    border-radius: 24px;
    margin: 50px 0 0 0;
    cursor: pointer;
}
#textarea::placeholder {
    color: #808191; 
}