.product {
    padding: 10px 0 40px;
}

.product::after {
    content: "";
    display: block;
    height: 0;
    clear: both;
    visibility: hidden;
}



.product_l {
    float: left;
    width: 280px;
}

.product_r {
    float: right;
    width: 880px;
}

.product_h {
    padding-left: 15px;
    font-size: 30px;
    color: #fff;
    line-height: 3em;
    font-weight: 700;
    background-color: #545454;
}

.product_nav_item {
    position: relative;
    line-height: 2.8em;
    border: 1px solid #dfdfdf;
    border-top: 0;
}

.product_nav_item>a {
    display: block;
    padding: 0 34px 0 18px;
    width: 100%;
    font-size: 14px;
    color: #545454;
    box-sizing: border-box;
}

.product_nav_item .icon-xiangxia-copy,
.product_nav_item .icon-xiangshang-copy {
    position: absolute;
    top: 0px;
    right: 0px;
    width: 34px;
    text-align: center;
    font-weight: 700;
}

.product_nav_item a:hover {
    color: #6aa84f;
}

/* 二级导航 */
.product_tow_list {
    border-top: 1px solid #dfdfdf;
    width: 100%;
}

.product_tow_item {
    position: relative;
    padding-left: 25px;
    line-height: 2.8em;
}

.product_tow_item::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 15px;
    display: inline-block;
    height: 2px;
    width: 2px;
    background-color: rgba(121, 121, 121, 0.6);
}

.product_tow_item>a {
    display: block;
    padding-right: 34px;
    width: 100%;
    font-size: 14px;
    color: #545454;
    box-sizing: border-box;
}

.product_nav_item .icon-xiangyou {
    position: absolute;
    top: 0;
    right: 0;
    width: 34px;
    text-align: center;
    height: 100%;
    font-weight: 700;
}

.product_tow_item:hover .product_three_list {
    display: block;
}

/* 三级导航 */
.product_three_list {
    display: none;
    position: absolute;
    left: 278px;
    top: 0;
    border: 1px solid #dfdfdf;
    background-color: #fff;
    z-index: 33;
}

.product_three_item {
    line-height: 2.8em;
}

.product_three_item a {
    display: block;
    padding: 0 20px;
    width: 200px;
    line-height: 2.4;
    font-size: 14px;
    color: #545454;
    box-sizing: border-box;
}

.product .product_active {
    color: #6aa84f;
}

/* 右侧产品列表 */
.product_r_h {
    padding-left: 20px;
    line-height: 52px;
    background-color: #ccc;
}

.product_r_h a {
    font-size: 18px;
    color: #545454;
}

.product_r_list {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.product_r_item {
    width: 430px;
    padding: 10px 0;
}

.product_r_item_img,
.recommend_item_img {
    position: relative;
    overflow: hidden;
}

.product_r_item_img>a {
    display: block;
    width: 100%;
    height: 206px;
}

.product_r_item_img a img {
    width: 100%;
    height: 100%;
}

.product_r_item_img_text {
    position: absolute;
    top: 90%;
    left: 0;
    width: 100%;
    height: 100%;
    text-align: center;
    background: rgba(0, 0, 0, 0.33);
    transition: all 0.5s;
}

.product_r_item_img_text::before {
    content: '';
    display: inline-block;
    height: 100%;
    vertical-align: middle;
}

.product_r_item_img_text a {
    font-size: 16px;
    color: #fff;
    text-decoration: underline;
}

.product_r_item_img:hover .product_r_item_img_text {
    top: 0;
    transition: all 0.5s;
}

.product_r_item_h {
    height: 37px;
    font-size: 16px;
    text-align: center;
    line-height: 50px;
}

/* 产品详情 */
.product_detail {
    text-align: center;
}

.parameter_h {
    font-size: 36px;
    color: #333;
    font-weight: 700;
    line-height: 1.8em;
    text-align: center;
    margin: 30px 0;
}

.product_detail img {
    max-width: 100%;
}

.parameter {
    margin-top: 40px;
}

.product_video {
    padding-bottom: 40px;
}

.video {
    width: 780px;
    margin: 0 auto;
}

.parameter_h:hover {
    color: #6aa84f;
}

.vtit img {
    width: 100%;
}

/* 产品推荐 */

.recommend_h {
    font-size: 30px;
    text-align: left;
    border-bottom: 1px solid #ccc;
    margin-bottom: 0;
}

.recommend_list {
    display: flex;
    justify-content: space-between;

}

.recommend_item {
    width: 380px;
    padding: 10px 0;
}

.recommend_item_img>a {
    display: block;
    width: 100%;
    height: 180px;
}

.recommend_item_img>a img {
    width: 100%;
    height: 100%;
}