.main > div:first-child {
  width: 1200px;
  position: absolute;
  top: 0;
}
.main_content {
  width: 1200px;
  line-height: 26px;
}
.main_list {
  width: 100%;
}
.main_item {
  margin-bottom: 50px;
  color: #394e69;
}
.item_message,
.item_reply {
  padding: 25px 90px 25px 18px;
  display: flex;
  align-items: center;
  box-sizing: border-box;
}
.item_message {
  background-color: #b1d8f2;
  margin-bottom: 22px;
}
.item_reply {
  border: 1px solid #b1d8f2;
  margin-bottom: 16px;
}
.item_img {
  width: 44px;
  /* height: 36px; */
  margin-right: 25px;
}
.submit_div {
  display: flex;
  align-items: center;
  justify-content: end;
  height: 15px;
  line-height: 15px;
  font-size: 15px;
  color: #bdd3e3;
}
.sub_num {
  margin-left: 50px;
}

/* 
在线留言
*/
.main_title {
  height: 37px;
  font-size: 37px;
  line-height: 36px;
  text-align: center;
  margin-bottom: 64px;
}
.main_form {
  width: 1200px;
  padding: 70px 100px 80px;
  box-sizing: border-box;
  background: #ffffff;
  box-shadow: 0px 0px 20px 0px rgba(0, 0, 0, 0.1);
}
.prompt {
  color: #e60012;
  line-height: 33px;
  margin-bottom: 30px;
}
.prompt div {
  display: flex;
  align-items: center;
}
.prompt .requied {
  margin-right: 20px;
}
form {
  line-height: 16px;
}
.form_item {
  width: 100%;
  min-height: 100px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid #dddddd;
  padding: 10px 5px;
  box-sizing: border-box;
}
form > .form_item:first-child {
  border-top: 1px solid #dddddd;
}
.requied {
  display: inline-block;
  width: 11px;
  height: 11px;
  line-height: 22px;
  font-size: 29px;
  color: #e4007f;
  margin-right: 5px;
}
.form_label {
  width: 150px;
}
.juxtaposition {
  width: 100%;
  display: flex;
  align-items: center;
}
.promise {
  height: auto;
  padding: 30px;
  border-bottom: 1px solid #dddddd;
}
.form_btn {
  margin-top: 60px;
}
.public p {
  color: #e60012;
  line-height: 29px;
  margin-top: 10px;
}
@media (max-width: 1220px) {
  .main > div:first-child,
  .main_content,
  .main_form {
    width: 800px;
  }
}
@media (max-width: 819px) {
  .main > div:first-child,
  .main_content,
  .main_form {
    width: 100%;
  }
  .main_title {
    height: 25px;
    font-size: 25px;
    line-height: 25px;
    text-align: center;
    margin-bottom: 30px;
  }
  .main_form {
    padding: 30px 10px 40px;
  }
  .form_label {
    width: 100px;
  }
  .juxtaposition {
    display: block;
  }
  .item_message,
  .item_reply {
    padding: 15px;
  }
  .item_img {
    width: 30px;
    margin-right: 15px;
  }
  .public {
    flex: 1;
  }
}