.main{
  margin-top: 50px;
  box-sizing: border-box;
}
.main .box{
 max-width: 1200px;
  margin: 0 auto;
}
.main .menu{
  float: left;
  width: 300px;
  height: 588px;
}
.main .menu_list li>a{
  display: block;
  width: 100%;
  height: 70px;
  line-height: 70px;
  font-size: 16px;
  font-weight: bold;
  color: #939393;
  border-bottom: 1px solid #eee;
}
.main .menu_list .active{
  color: #333;
  border-bottom: 2px solid #c00a27;
}
.main .menu_list .active .arrow{
  float: right;
  width:5px;
  height: 10px;
  margin: 31px 14px 0 0;
  background-image: url(../../img/service/arrow.png);
  background-size: 5px 10px;
}
.main .menu_list li>a .text{
  vertical-align: middle;
}
.main .menu_list .icon{
  font-size: 25px;
  color: #888;
  font-weight: normal;
  margin-right: 20px;
  vertical-align: middle;
}
i,b{
  font-style: normal;
}
/* diagram */
.main .diagram{
  float: right;
  max-width: 840px;
}
.main .diagram .img>img{
  width: 100%;
  height: 100%;
}
.main .diagram p{
  padding: 29px 0 23px 0;
  font-size: 14px;
  color: #333;
  border-bottom: 1px solid #eee;
}
.main .diagram p .key{
  color: #c6092d;
  font-weight: bold;
  cursor: pointer;
}
.main .diagram .introduce{
  width: 100%;
  border-bottom: 1px solid #eee;
  padding: 30px 60px 30px 30px;
  box-sizing: border-box;
}
.main .diagram .introduce:nth-child(n + 5){
  display: none;
}
.main .diagram .introduce .heater_img{
  float: right;
}
.main .diagram .introduce .column{
  float: left;
}
.main .diagram .introduce:nth-child(even) .heater_img{
  float: left;
}
.main .diagram .introduce:nth-child(even) .column{
  float: right;
}
.main .diagram .heater_img{
  width: 320px;
  height: 320px;
}
.main .diagram .last_img{
  width: 320px;
  height: 272px;
  margin-top: 49px;
}
.main .diagram img{
  width: 100%;
  height: 100%;
}
.main .diagram .col_1, .col_3{
  float: right;
  margin-top: 67px;
}
.main .diagram .col_2, .col_4, .col_5, .col_6{
  float: left;
  margin-top: 27px;
}
.main .diagram .col_3, .col_4{
  margin-top: 22px;
}
.main .diagram .column_title{
  font-size: 14px;
  color: #333;
  font-weight: bold;
  margin-bottom: 20px;
}
.main .diagram .surface{
  border-collapse: collapse;
  font-size: 12px;
}
.main .diagram .surface tr:first-child{
  border: 1px solid #eee;
}
.main .diagram .surface th,
.main .diagram .surface td{
  width: 180px;
  height: 40px;
  padding-left: 40px;
  box-sizing: border-box;
}
.main .diagram .surface th{
  background-color: #f2f2f2;
}
.main .diagram .surface td{
  border: 1px solid #eee;
}
.ask_content .load-btn{
  display: block;
  background: #c6092d;
  border: 1px solid #c6092d;
  text-align: center;
  color: #fff;
  width: 106px;
  height: 40px;
  line-height: 38px;
  border-radius: 50px;
  font-weight: bold;
  cursor: pointer;
  margin: auto;
  margin-top: 30px;
  /* -webkit-transition: all ease 0.6s;
  -moz-transition: all ease 0.6s;
  -ms-transition: all ease 0.6s;
  transition: all ease 0.6s; */
}
.ask_content .load-btn:hover{
  border: 1px solid #c6092d;
  background: #fff;
  color: #c6092d;
}
.ask_content .load-btn.loading{
  background-color: #eee;
  border: none;
}
.ask_content .load-btn.loading span{
  display: none;
}
.ask_content .load-btn.loading b{
  display: block;
  width: 20px;
  height: 20px;
  margin: auto;
  border-top: 2px solid #fff;
  border-right: 2px solid transparent;
  border-radius: 50%;
  animation: loading 5s linear infinite;
  -webkit-animation: loading 1s linear infinite;
}
@media screen and (max-width: 1200px){
  .main{
    padding: 0 20px;
  }
  .main .menu{
    width: 25%;
  }
  .main .diagram{
    width: 65%;
    background-size: 100% 588px;
  }
  .main .diagram .img>img{
    height: 100%;
  }
  .main .diagram .heater_img{
    width: 48%;
    height: 280px;
  }
  .main .diagram .introduce{
    padding: 30px 15px 30px 10px;
    box-sizing: border-box;
  }
  .main .diagram .surface th,
  .main .diagram .surface td{
    max-width: 120px;
    height: 40px;
    padding-left: 40px;
    box-sizing: border-box;
  }
}

@media screen and (max-width: 768px){
  .main{
    margin: 0;
    padding: 0;
  }
  .main .diagram{
    width: 100%;
    background-size: 100% 100%;
    background: #fff;
    padding: 0 4%;
    box-sizing: border-box;
  }
  .main .diagram .diagram_title{
    font-size: 20px;
    line-height: 24px;
    margin:39px 0 25px;
    font-weight: bold;
    text-align: center;
  }
  .main .diagram .img>img{
    width: 100%;
    height: 100%;
    margin-bottom: 25px;
  }
  .main .diagram p{
    padding: 0;
    font-size: 14px;
    line-height: 22px;
    padding:0 3% 24px 1%;
  }
  .main .diagram .introduce{
    padding: 19px 0 24px 0;
    box-sizing: border-box;
  }
  .main .diagram .introduce:nth-child(n + 3){
    display: none;
  }
  .main .diagram .heater_img{
    float: none;
    width: 50%;
    height: 184px;
    margin: 0 auto;
  }
  .main .diagram .column{
    float: none;
    font-size: 12px;
    margin-top: 13px;
  }
  .main .diagram .introduce .heater_img{
    float: none;
  }
  .main .diagram .introduce .column{
    float: none;
  }
  .main .diagram .introduce:nth-child(even) .heater_img{
    float: none;
  }
  .main .diagram .introduce:nth-child(even) .column{
    float: none;
  }
  .main .diagram .column_title{
    text-align: center;
    font-weight: bold;
    margin-bottom: 17px;
  }
  .main .diagram .surface th,
  .main .diagram .surface td{
  width: 133px;
  height: 40px;
  padding-left: 0;
  text-align: center;
}
  .main .diagram .surface{
    margin:auto;
  }
  .main .diagram .load-btn{
    width: 37%;
    height: 40px;
    line-height: 40px;
    font-size: 13px;
    margin: 20px auto 35px;
  }
  .main .diagram  .load-btn:hover{
    background: #c6092d;
    color: #fff;
  }
  .main .diagram  .load-btn.loading{
    background-color: #eee;
    border: none;
  }
}