.product {
  display: flex;
  width: 74%;
  height: auto;
  margin: 80px auto;
}

.product .left {
  width: 280px;
}

.product .left .tab {
  width: 100%;
  margin-bottom: 20px;
}

.product .left .tab .title {
  font-family: Raleway, Raleway;
  font-weight: 700;
  font-size: 24px;
  color: #292929;
  line-height: 28px;
  margin-bottom: 20px;
}

.product .left .tab .line {
  position: relative;
  width: 100%;
  height: 1px;
  background: #F0F0F0;
}

.product .left .tab .line::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 50%;
  height: 2px;
  background-color: #292929;
}

.product .left .layui-nav {
  width: 100%;
  height: auto;
  background-color: #FFFFFF;
}

.product .left .layui-nav .layui-nav-item {
  margin-bottom: 20px;
}

.product .left .layui-nav .layui-nav .layui-this:after,
.product .left .layui-nav .layui-nav-bar {
  display: none !important;
}

.product .left .layui-nav a {
  color: #757575;
  transition: all 0s !important;
}

.product .left .layui-nav .navbit {
  position: relative;
  display: flex;
  align-items: center;
  height: 44px;
  font-family: Raleway, Raleway;
  font-weight: 400;
  font-size: 18px;
  color: #292929;
  line-height: 18px;
}

.product .left .layui-nav .navbit::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #292929;
  transform: translateY(-50%);
}

.product .left .layui-nav .layui-icon {
  padding: 0;
  top: 14px;
}

.product .left .layui-nav .layui-icon::before {
  font-size: 18px;
}

.product .left .layui-nav .layui-nav-itemed .navbit {
  font-weight: 700;
  color: #292929 !important;
}

.product .left .layui-nav .layui-this {
  background-color: #FFFFFF !important;
}

.product .left .layui-nav .layui-this .navbit {
  font-weight: 700;
  color: #E71215 !important;
  background-color: #FFFFFF !important;
}

.product .left .layui-nav .layui-nav-child {
  background-color: #FFFFFF;
}

.product .left .layui-nav .layui-nav-child dd {
  margin-bottom: 10px;
}

.product .left .layui-nav .layui-nav-child dd a {
  font-family: Raleway, Raleway;
  font-weight: 400;
  font-size: 18px;
  color: #757575;
  display: flex;
  align-items: center;
  text-align: left;
  transition: all 0s !important;
}

.product .left .layui-nav .layui-nav-child .layui-this {
  background-color: #FFFFFF;
}

.product .left .layui-nav .layui-nav-child .layui-this a {
  font-family: Raleway, Raleway;
  font-weight: 700;
  font-size: 18px;
  color: #E71215;
  line-height: 18px;
  text-align: left;
  background-color: #FFFFFF;
  transition: all 0s !important;
}

.product .right {
  flex: 1;
  height: auto;
  margin-left: 2.083vw;
}

.product .right .top {
  display: flex;
  flex-wrap: wrap;
  width: 100%;
  height: auto;
}

.product .right .top .item {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: Raleway, Raleway;
  font-weight: 400;
  font-size: 18px;
  color: #757575;
  padding: 13px 40px;
  background: #F7F7F7;
  margin-right: 10px;
  margin-bottom: 10px;
  border-radius: 54px 54px 54px 54px;
}

.product .right .top .item:hover {
  color: #FFFFFF;
  background-color: #E71215;
}

.product .right .top .active {
  font-weight: 700;
  color: #FFFFFF;
  background-color: #E71215;
}

.product .right .productbox {
  margin-top: 40px;
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(3, 1fr);
}

.product .right .productbox .list {
  height: auto;
}

.product .right .productbox .list .pic {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 100%;
  height: 18.021vw;
  overflow: hidden;
  border: 1px solid #F0F0F0;
}

.picsmall {
  /* 270px */
  width: 14.063vw;
  height: 14.063vw;
}

.product .right .productbox .list .pic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: all 0.4s;
}

.product .right .productbox .list .c-btn::after {
  content: "";
  display: block;
  position: absolute;
}

.product .right .productbox .list .c-btn::before {
  content: "";
  display: block;
  position: absolute;
}

.product .right .productbox .list .c-btn--border-line {
  background: rgba(0, 0, 0, 0) none repeat scroll 0 0;
  box-shadow: 0 0 0 0 transparent inset;
  box-sizing: border-box;
}

.product .right .productbox .list .c-btn--border-line::after,
.product .right .productbox .list .c-btn--border-line::before {
  border: 1px solid transparent;
  box-sizing: border-box;
  height: 0;
  width: 0;
}

.product .right .productbox .list .c-btn--border-line::after {
  left: 0;
  top: 0;
  transition: border-color 0s ease-in 0.8s, width 0.2s ease-in 0.6s, height 0.2s ease-in 0.4s;
}

.product .right .productbox .list .c-btn--border-line::before {
  bottom: 0;
  right: 0;
  transition: border-color 0s ease-in 0.4s, width 0.2s ease-in 0.2s, height 0.2s ease-in 0s;
}

.product .right .productbox .list .name {
  width: 100%;
  margin: 20px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: Raleway, Raleway;
  font-weight: 400;
  font-size: 20px;
  color: #292929;
}

.product .right .productbox .list:hover .pic img {
  transform: scale(1.1);
}

.product .right .productbox .list:hover .name {
  color: #E71215;
  text-decoration: underline;
}

.product .right .productbox .list:hover .c-btn--border-line::after {
  height: 100%;
  width: 100%;
}

.product .right .productbox .list:hover .c-btn--border-line::before {
  height: 100%;
  width: 100%;
}

.product .right .productbox .list:hover .c-btn--border-line::after {
  border-right-color: #E71215;
  border-top-color: #E71215;
  transition: width 0.2s ease-out 0s, height 0.2s ease-out 0.2s;
}

.product .right .productbox .list:hover .c-btn--border-line::before {
  border-bottom-color: #E71215;
  border-left-color: #E71215;
  transition: border-color 0s ease-out 0.4s, width 0.2s ease-out 0.4s, height 0.2s ease-out 0.6s;
}

@media (max-width: 961px) {
  .product {
    display: block;
    width: 100%;
    height: auto;
    padding: 0 15px;
    margin: 30px 0;
  }

  .product .left {
    width: 100%;
  }

  .product .left .tab {
    margin-bottom: 15px;
  }

  .product .left .tab .title {
    font-size: 20px;
    margin-bottom: 10px;
  }

  .product .left .layui-nav-item a {
    font-size: 16px !important;
  }

  .product .left .layui-nav-tree .layui-nav-item a {
    height: 30px;
    line-height: 30px;
    margin-bottom: 10px;
  }

  .product .left .layui-nav .layui-icon::before {
    font-size: 16px;
  }

  .product .left .layui-nav .layui-icon {
    top: 0 !important;
  }

  .product .right {
    margin: 0;
  }

  .product .right .top {
    width: 100%;
    height: auto;
    flex-wrap: nowrap;
    overflow-x: auto;
  }

  .product .right .top .item {
    padding: 10px;
    font-size: 14px;
    white-space: nowrap;
  }

  .product .right .productbox {
    width: 100%;
    margin: 30px 0;
    grid-template-columns: repeat(2, 1fr);
  }

  .product .right .productbox .list .pic {
    height: 150px;
  }

  .picsmall {
    width: 100%;
    height: 100%;
  }

  .product .right .productbox .list .name {
    font-size: 14px;
    margin: 12px 0;
  }
}