.goods-main {
    background-color: #f8f8f8;
}

.title {
    padding: 50px 0 50px;
    line-height: 60px;
}

.title .t1 {
    font-size: 45px;
    color: #5b5b5b;
    font-weight: bold;
    letter-spacing: 2px;
}

.title .t2 {
    font-size: 45px;
    color: #ededed;
    font-weight: bold;
}

.banner-wrapper {
    width: 100%;
    max-width:1920px;
    display: block;
    margin: 0 auto;
    margin-bottom: 50px;
}
.banner-wrapper .pic {
    width: 100%;
    display: block;
    margin: 0 auto;
}

.goods-nav {
    padding-bottom: 20px;
}
.goods-nav .goods-nav-item {
    width: 380px;
    /* height: 595px; */
    float: left;
    position: relative;
    margin-left: 30px;
    margin-bottom: 30px;
}
.goods-nav .goods-nav-item:nth-child(3n+1) {
    margin-left: 0;
}
.goods-nav .goods-nav-item img {
    display: block;
    width: 100%;
}
.goods-nav-item .goods-item-none {
    opacity: 0;
}
.goods-nav-item .goods-item-front,
.goods-nav-item .goods-item-back {
    position: absolute;
    left: 0;
    top: 0;
    backface-visibility: hidden;
    transition: all .3s;
    cursor: pointer;
}
.goods-nav-item .goods-item-back {
    transform: rotateY(-180deg);
}
.goods-nav .goods-nav-item:hover .goods-item-front {
    transform: rotateY(-180deg);
}
.goods-nav .goods-nav-item:hover .goods-item-back {
    transform: rotateY(0);
}
/* .bg-mask {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.2);
    opacity: 0;
    -webkit-transition: opacity linear 0.2s;
    -o-transition: opacity linear 0.2s;
    transition: opacity linear 0.2s;
}
.goods-nav-item:hover .bg-mask {
    opacity: 1;
} */