nav {
    width: 1140px;
    margin: 0 auto;
    height: 78px;
    display: flex;
}
nav .item{
    color: #aaa;
    padding: 0 18px;
    line-height: 78px;
    font-size: 16px;
}
nav .item.active{
    float: left;
    color: #FA0;
    position: relative;
}
nav .item.active::after{
    left: 50%;
    position: absolute;
    height: 4px;
    bottom: 0;
    left: 0;right: 0;
    display: block;
    content: '';
    background: #FA0;
}


input {
  font-size: 30px;
}


.middle{
  padding-top: 30px;
  background: #f6f6f6;
}
.mimg{
  width: 100%;
  height: 440px;
}
.wagz{
  line-height: 83px;
}
.midinput{
  background: #ffff;
  margin:0 auto ;
  width: 1140px;
  height: 761px;
  margin-bottom: 60px;
}
.wyzx{
   font-size: 54px;
   line-height:164px;
   margin-top:94px;
   text-align: center;
   font-weight: 700;
   color: #343333;
}
.tishi{
  font-size: 22px;
  line-height: 61px;
  margin-left:215px;
  width: 138px;
  margin-bottom: 30px;
}
.midinput input{
  width: 467px;
  height: 61px;
  margin-bottom: 30px;
  border:1px solid #c6c5c5;
  border-radius: 10px;
}
.tijiao{
  margin-top:43px;
  width: 464px;
  height: 56px;
  background: #fa0;
  margin-left: 353px;
  border-radius: 30px;
  color: #ffff;
  font-size: 24px;
}