.wrap {
    position: relative;
}

.wrap .banner .bga,
.wrap .banner .bgb {
    height: 435px;
    background: url(../images/banner1.jpg) no-repeat center top;
}

.wrap .banner .bgb {
    background-image: url(../images/banner2.jpg);
}
.help-box{
    width: 1000px;
    height: 435px;
    margin: 0 auto;
    position: relative;
}
.help{
    position: absolute;
    width: 106px;
    height: 28px;
    top:0;
    right: 0;
    cursor: pointer;
}
.code-box {
    position: absolute;
    width: 277px;
    left: 50%;
    bottom: 54px;
    margin-left: -139px;
    border-radius: 10px;
    background: rgba(255, 255, 255, .6);
    padding: 13px;
}

.code-box .code {
    width: 246px;
    height: 246px;
    border-radius: 10px;
    background: #208a72;
    padding: 13px;
    margin: 0 auto 10px;
}

.code-box .code img {
    width: 100%;
    height: 100%;
    display: block;
}

.code-box .font {
    width: 100%;
    line-height: 42px;
    color: #fff;
    font-size: 26px;
    border-radius: 10px;
    background: rgba(32,138,114,0.63);
    text-align: center;
}
.mask,.dialog{
    position: fixed;
    z-index: 100;
}
.mask{
    top:0;
    right: 0;
    bottom: 0;
    left: 0;
    background: rgba(0,0,0,0.8);
}
.dialog{
    top:50%;
    left:50%;
    width: 600px;
    transform: translate(-50%,-50%);
    -webkit-transform: translate(-50%,-50%);
}
.dialog .t-close{
    text-align: right;
    margin-bottom: 10px;
    cursor: pointer;
}
.dialog .t-txt{
    padding: 20px;
    background:rgba(32,138,114,0.9) ;
    color: #fff;
    border-radius: 8px;
}
.dialog .t-txt .t-txt-inner{
    max-height: 400px;
    overflow-y: auto;
    font-size: 16px;
}