:root {
  --primary-color: #2c5282;
  --secondary-color: #4299e1;
  --background-color: #f8fafc;
  --text-color: #2d3748;
  --card-background: #ffffff;
}

.container {
  max-width: 66.667vw;
  margin: 0 auto;
  padding: 1rem 0;
}

.product-features-title .title,
.product-intro-title .title {
  color: #1756A4;
  font-size: 2em;
  font-weight: 900;
  margin: 1em 0;
  position: relative;
}

.product-features-title .title::after,
.product-intro-title .title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: .5em;
  background-color: #3AB180;
  z-index: -1;
}

.product-intro-title .title:nth-child(2) .title h3 {
  letter-spacing: 0.1em;
}

/* 产品介绍 */

.product-intro {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.product-intro-info {
  /* 移动端请恢复 100% */
  max-width: 50%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.product-intro-info .title,
.product-performance .title {
  display: flex;
  justify-content: center;
  margin: 2rem 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.product-intro .title h3 {
  font-weight: bold;
  text-align: center;
  color: #ffffff;
  background-color: #215B9F;
  padding: .5rem;
  border-radius: 50px;
  width: 200px;
}


.product-intro-info .img {
  display: flex;
  justify-content: center;
}

.product-intro-info .img img {
  max-width: 450px;
}

.product-intro-info .desc-card {
  /* padding: 1rem; */
}


.desc-card ul li {
  margin-bottom: 10px;
}

.desc-card ul li span {
  display: inline-block;
  width: 85px;
  text-align: right;
  margin-right: 10px;
}

.product-intro-info .desc-card .content {
  font-size: 1.1em;
  text-align: justify;
  display: inline-block;
  width: calc(100% - 95px);
  vertical-align: top;
  
}

.product-intro-info .desc-card .product-info-table {
  /* 顶部对齐 */
  height: 100%;
}
.product-intro-info .desc-card .product-info-table .label {
  width: 5em;
  vertical-align: top;
  color: #1756A4;
  font-weight: 700;
}

/* 性能参数 */
.product-performance {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.product-performance-table-wrap {
  width: 85%;
}

.product-performance table {
  border-spacing: 0;
  border-color: #1A509A;
  border-collapse: separate;
  color: #111;
  width: 100%;
  line-height: 1.2;
  border: 0.052vw solid #E4EAF4;
  margin: 0 auto;
}

.product-performance table thead {
  background: #17509b;
  color: #fff;
  font-weight: bold;
  width: 200px;
}

.product-performance table thead th {
  padding: 15px 0;
}

.product-performance table tbody tr {
  background: #E8EEF5;
  text-align: center;
}

.product-performance table tbody tr:hover,
.product-performance table tbody tr:nth-child(2n):hover {
  background: rgba(23, 80, 155, 0.5);
  color: #fff;
}

.product-performance table tbody tr:nth-child(2n) {
  background: #fff;
}

.product-performance table tbody tr td {
  padding: 0.781vw 0;
  border: .5px solid #1A509A;
  /* border-bottom: 1px solid #17509B; */
}


tbody tr td[rowspan]:first-child {
  background-color: #E8EEF5;
  color: #000;
}


/* 产品特点 */
.product-features {
  margin-top: 2rem;
}

.feature-card {
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 20px;
  display: flex;
}

.feature-card:nth-child(2n) {
  flex-direction: row-reverse;
}

.feature-card:nth-child(2n) .text {
  text-align: right;
}

.feature-card .img {
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  flex: 4;
}

.feature-card .img img {
  width: 100%;
  height: auto;
}

.feature-card .text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem;
  flex: 6;
}

.feature-card .title {
  padding-bottom: 2em;
  color: #17509B;
}

.feature-card .content {
  color: #323232;
}


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

/* 产品升级 */

.product-ext {
  content: "TODO";
}

.product-ext .product-performance {
  margin-top: 2rem;
}

.product-ext .product-ext-img {
  width: 100%;
  height: auto;
}

.product-ext .product-ext-img img {
  width: 100%;
}

.product-ext .product-ext-img .text {
  text-align: center;
  margin: 1em 0;
}

.desc-card ul li span,
.desc-card p.content span,
.product-ext .product-ext-img .text span {
  color: #17509B;
  font-weight: 700;
}

/* AI 2600 特征卡片 */

.product-feature-2600 {
  display: flex;
}

.product-feature-2600 .card {
  color: #ffffff;
  background-color: #1A509A;
  display: flex;
  flex-direction: column;
  /* justify-content: center; */
  align-items: center;
  flex: 1;
  margin: 2rem;
  padding: 0 2em;
}

.product-feature-2600 .card .title {
  text-align: center;
  margin: 2rem 0;
}

.product-feature-2600 .card .img {
  height: 200px;
  margin-bottom: 2em;
}

.product-feature-2600 .card .img img {
  width: 100%;
  height: 100%;
}

.product-feature-2600 .card p.desc {
  margin-bottom: 2em;
}

/* 移动端 */
@media screen and (max-width: 768px) {

  .product-feature-2600 {
    display: flex;
    flex-direction: column;
  }

  .product-feature-2600 .card {
    margin: 0;
    margin-top: 2rem;
  }

  .product-intro {
    display: block;
  }

  .product-intro-info {
    max-width: 100%;
  }

  .product-intro-info .img img {
    width: 100%;
  }


  .product-performance table {
    max-width: none;
    font-size: 14px;
    border: 1px solid #E4EAF4;
  }

  .feature-card {
    flex-direction: column;
  }

  .feature-card .img {
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
  }


}