html,
body {
  margin: 0;
  padding: 0;
}
body {
  width: 100%;
  max-width: 640px;
  min-width: 320px;
  margin: 0 auto;
}
@media screen and (min-width: 320px) and (max-width: 350px) {
  .txt {
    font-size: 15px !important;
  }
}
@media screen and (min-width: 350px) and (max-width: 480px) {
  .txt {
    font-size: 16px !important;
  }
}

@media screen and (min-width: 480px) and (max-width: 640px) {
  .txt {
    font-size: 18px !important;
  }
}
.head {
  position: relative;
  width: 100%;
}
.banner img,
.head img {
  display: block;
  line-height: 0;
  border: none;
  width: 100%;
}
.banner {
  position: relative;
}
.btn {
  width: 48%;
  position: absolute;
  bottom: 7%;
  left: 50%;
  margin-left: -24%;
}
.txt {
  position: absolute;
  top: 94%;
  width: 100%;
  color: #fcd865;
  font-family: "microsoft yahei";
  font-size: 15px;
  text-align: center;
}
.Img {
  width: 90%;
  position: absolute;
  top: 18%;
  left: 50%;
  margin-left: -45%;
}
.banner .top1 {
  top: 20%;
}
.banner .top2 {
  top: 13%;
}
.footBtn {
  width: 48%;
  position: absolute;
  bottom: 7%;
  left: 50%;
  margin-left: -24%;
}
.top {
  position: fixed;
  top: 0px;
  width: 100%;
}

.footbar {
  color: #999;
  line-height: 25px;
  margin: 10px auto;
  padding: 18px 0 10px;
  text-align: center;
  font-size: 12px;
}

.footbar a {
  color: #666;
  text-decoration: none;
}