.choose {
    width: 1200px;
    margin: 0 auto;
    position: relative;
    padding-bottom: 20px;
}

.product-detail-desc {
    margin: 36px 4px 36px;
    padding: 20px 30px;
    border: 1px solid #eee;
}
.product-detail-desc .title {
    padding-bottom: 3px;
    border-bottom: 1px solid #ebebeb;
}
.product-detail-desc .title span {
    padding: 0 6px 4px;
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    border-bottom: 2px solid #00a0e9;
}
.product-explain i {
    display: inline-block;
    *display: inline;
    *zoom: 1;
    width: 18px;
    height: 18px;
    background: url(../images/reg-icon.png) no-repeat 0 -939px;
    vertical-align: middle;
}
.product-detail-desc p {
    line-height: 2;
    color: #fff;
}
.pt-5 {
    padding-top: 20px;
}