@media screen and (min-width: 1201px) {
  .container {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    padding: 50px 0;
  }
  .left-nav {
    margin-right: 40px;
  }
  .left-nav .title {
    background-color: #0065b3;
    color: white;
    height: 54px;
    width: 350px;
    line-height: 54px;
    text-align: center;
    font-size: 30px;
    font-weight: bold;
  }
}
.class-list {
  padding: 15px 20px;
}
.class-list i {
  height: 20px;
  width: 20px;
  background-color: #D1D1D1;
  border-radius: 20px;
  font-size: 12px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  color: white;
}
.class-item {
  background-color: #F5F5F5;
  border: 1px solid #eaeaea;
}
.class-item.active .class-sub {
  max-height: 150px;
}
.class-item.active i {
  -webkit-transform: rotate(90deg);
          transform: rotate(90deg);
}
.class-item + .class-item {
  margin-top: 5px;
}
.class-name {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  line-height: 50px;
  padding: 0 30px;
  cursor: pointer;
}
.class-name i {
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
}
.class-sub {
  max-height: 0;
  overflow: hidden;
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
}
.class-sub a {
  display: block;
  line-height: 40px;
  padding: 0 30px;
  font-size: 14px;
  text-indent: 16px;
}
.info {
  border: 1px solid #F5F5F5;
  padding: 20px;
}
.info .tel {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  margin-bottom: 30px;
}
.info .tel img {
  height: 42px;
  width: auto;
  margin-right: 24px;
}
.info .tel p {
  margin-bottom: 10px;
  font-size: 19px;
}
.info .tel a {
  font-size: 28px;
  color: #0065b3;
}
.info-name {
  font-size: 21px;
  font-weight: bold;
  margin-bottom: 15px;
}
.info-desc div {
  padding: 10px 0;
}
.info-desc div + div {
  border-top: 1px dotted #d5d5d5;
}
.content {
  -webkit-box-flex: 1;
      -ms-flex: 1;
          flex: 1;
}
.product-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 30px;
}
.product-item {
  border: 1px solid #f0f0f0;
}
.product-item img {
  width:250px;
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
 
}
.product-item .img {
  height: 260px;
  overflow: hidden;
  text-align: center;
}
.product-item:hover img {
  -webkit-transform: scale(1.1);
          transform: scale(1.1);
}
.product-title {
  line-height: 40px;
  padding-top: 10px;
  text-align: center;
}
@media screen and (max-width: 1200px) {
  .container {
    padding-bottom: 50px;
  }
  .product-list {
    padding: 20px;
    grid-template-columns: repeat(2, 1fr);
  }
  .product-item img {
    height: auto;
    width: 100%;
  }
  .product-item .img {
    height: initial;
  }
}