.head{
  height: 100vh;
  display: flex;
  flex-direction: column;
}
.head_a{
  position: fixed;
  top: 50px;
  left: 0;
  right: 0;
  height:100px;
  background-color: #fff;
  display: flex;
  align-items: center;
  padding: 0 15px;
  z-index: 100;
}
.head_b{
  display: flex;
  flex-direction: column;
}
.head_c{
  position: relative;
  bottom: 10px;
  display: flex;
  align-items:center;
  justify-content:space-between;
}
 .van-search{
  width: 360px;
} 
.head_d{
  position: relative;

}
.head_shouhuo{
  position: relative;
right: 85px;
}
.head_text{
  font-weight: bold;
  font-size: 40rpx;
  
}
.head_box{
  margin-top: 160px;
  padding: 10px;
  overflow-y: auto;
}