.product_preview {
  padding-top: 70px;
}
.product_preview .left {
  width: 50%;
  position: sticky;
  top: 0;
}
.product_preview .left img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  position: absolute;
  left: 0;
  top: 0;
}
.product_preview .left .product_preview_swiper {
  margin: 0 auto;
  overflow: hidden;
  max-width: 554px;
}
.product_preview .left .product_preview_swiper .swiper-slide {
  padding-bottom: 97.473%;
  position: relative;
}
.product_preview .left .product_control_swiper {
  overflow: hidden;
  margin-top: 40px;
}
.product_preview .left .product_control_swiper .swiper-slide {
  padding-bottom: 14.95082%;
  position: relative;
  border: 1px solid #eaeaea;
  opacity: 0.5;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
}
.product_preview .left .product_control_swiper .swiper-slide.active {
  border-color: var(--theme_color);
  opacity: 1;
}
.product_preview .right {
  padding-top: 70px;
  flex: 1;
  margin-left: 1.2rem;
  max-width: 566px;
}
.product_preview .right span {
  color: var(--theme_color);
}
.product_preview .right h1 {
  color: var(--title_color);
  font-size: 43px;
  font-weight: 900;
  margin: 2px 0 44px;
}
.product_preview .right p {
  color: var(--content_color);
  line-height: 29px;
  margin-bottom: 52px;
}
.product_preview .right ul li {
  color: #212121;
  line-height: 29px;
  padding-left: 30px;
  position: relative;
  font-weight: 500;
  margin-bottom: 6px;
}
.product_preview .right ul li:last-child {
  margin-bottom: 0;
}
.product_preview .right ul li::before {
  content: '';
  display: block;
  width: 14px;
  height: 14px;
  background: url(../img/gou.svg) no-repeat center / contain;
  position: absolute;
  left: 0;
  top: 6px;
}
.product_preview .right .button {
  width: 100%;
  max-width: 276px;
  font-size: 18px;
  padding: 13.5px;
  font-weight: normal;
  margin-top: 60px;
}
.product_spec {
  padding: 112px 0 200px;
}
.product_spec .head h2 {
  font-size: 46px;
  line-height: 55px;
}
.product_spec .head p {
  font-size: 17px;
  color: var(--content_color);
  line-height: 26px;
  max-width: 716px;
  margin: 26px auto 0;
}
.product_spec table {
  margin-top: 50px;
  width: 100%;
  border-collapse: collapse;
}
.product_spec table tr {
  transition: all 0.3s;
  background-color: #fefefe;
}
.product_spec table tr:nth-child(odd) {
  background-color: #fafafa;
}
.product_spec table tr:hover {
  background-color: #eeeeee;
}
.product_spec table tr td {
  line-height: 29px;
  color: var(--content_color);
  padding: 23px 22px;
}
.product_spec table tr td:first-child {
  font-size: 17px;
  color: #212121;
  font-weight: 500;
  width: 22.541%;
}