.main {
  padding-top: 90px;
  padding-bottom: 80px;
}

.rtit {
  margin-bottom: 50px
}

.rtit h1 {
  font-size: 36px;
  color: #333;
  line-height: 1;
  font-weight: 700;
  text-align: center;
}

.main-right {
  margin-left: 350px;
}

.main-left {
  float: left;
  width: 310px;
}

.main-left h3 {
  font-size: 18px;
  height: 50px;
  line-height: 49px;
  padding: 0 0 0 7px;
  font-weight: bold;
  border-bottom: 1px solid #e2e2e2;
  color: #212121;
  position: relative;
}

.main-left h3::after {
  display: none;
  font-family: "qico";
  content: "\e727";
  position: absolute;
  top: 6px;
  right: 0;
  width: 40px;
  height: 40px;
  line-height: 40px;
  text-align: center;
  font-size: 20px;
  -webkit-transition: -webkit-transform .3s ease;
  transition: -webkit-transform .3s ease;
  transition: transform .3s ease;
  transition: transform .3s ease, -webkit-transform .3s ease;
}

.main-left h3.active::after {
  -webkit-transform: rotate(45deg) scale(1.08);
  -ms-transform: rotate(45deg) scale(1.08);
  transform: rotate(45deg) scale(1.08);
}


.prolist > ul {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  margin: -30px -11px 0;
}

.prolist > ul li {
  width: 33.3333333333%;
  padding: 0 11px;
  margin-top: 30px;
  position: relative;
  box-sizing: border-box;
  text-align: center;
}

.prolist > ul li .pic {
  display: block;
  overflow: hidden;
  width: 100%;
  position: relative;
  background: #DFECDE;
}

.prolist > ul li:nth-child(2n) .pic {
  background: #E8F4E6;
}

.prolist > ul li .pic::after {
  content: "";
  display: none;
  background: rgba(0, 0, 0, 0.35) url(../images/i2.png) no-repeat center;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
}

.prolist > ul li .pic img {
  width: 100%;
  display: block;
  transition: all 0.3s ease 0s;
}

.prolist > ul li p {
  margin: 20px 0 0;
  text-align: center;
  font-size: 16px;
}

.prolist > ul li p a {
  color: #212121;
}

.prolist > ul li p a:hover {
  text-decoration: underline;
}


@media screen and (max-width:1400px) {
  .main {
    padding-top: 70px;
    padding-bottom: 60px;
  }

  .rtit h1 {
    font-size: 34px
  }

  .main-right {
    margin-left: 320px;
  }

  .main-left {
    width: 280px;
  }
}

@media screen and (max-width:1280px) {
  .main-right {
    margin-left: 300px;
  }

  .main-left {
    width: 260px;
  }
}

@media screen and (max-width:992px) {
  .main {
    padding-top: 30px;
    padding-bottom: 20px;
  }

  .main-right {
    margin-left: 0;
  }

  .main-left {
    float: none;
    width: 100%;
  }

  .main-left h3::after {
    display: block;
  }
}

@media screen and (min-width:992px){
   .prolist > ul li:hover .pic img {
      transform: scale(1.04);
      -webkit-transform: scale(1.04);
    }
    .prolist > ul li:hover .pic p {
      color: #fff;
    }
    .prolist > ul li:hover>.pic::after {
      display: block;
    }
   .prolist > ul li:hover p a {
      text-decoration: underline;
    }
}

@media screen and (max-width:768px) {
  .main {
    padding-top: 20px;
  }

  .rtit h1 {
    font-size: 30px;
    text-align: center
  }

  .prolist > ul {
    margin: -20px -8px 0;
  }

  .prolist > ul li {
    width: 50% !important;
    padding: 0 8px;
    margin-top: 20px;
  }

  .prolist > ul li p {
    margin: 15px 0 0;
    font-size: 15px;
  }
}

@media screen and (max-width: 480px) {
  .rtit h1 {
    font-size: 24px
  }
}