body {
  position: relative;
  background-color: #fff;
  padding: 0;
  margin: 0;
}
* {
  padding: 0;
  margin: 0;
}
.viewport {
  position: relative;
  box-sizing: border-box;
  max-width: 1920px;
  margin: 0 auto;
  min-width: 1366px;
}
.viewport .banner {
  min-width: 1366px;
  max-width: 100%;
}
.main {
  text-align: center;
}
.production {
  display: inline-block;
  position: relative;
}
.production .list {
  position: absolute;
  left: 116px;
  right: 116px;
  top: 92px;
  bottom: 0px;
  box-sizing: border-box;
  border: 1px solid transparent;
  text-align: left;
}
.production .list .btn {
  width: 262px;
  height: 256px;
  margin: 23px 53px 23px 53px;
  border: 5px solid transparent;
  display: inline-block;
  box-sizing: border-box;
  border-radius: 30px;
  transition: all 0.3s;
  cursor: pointer;
}
.production .list .btn:hover {
  border-color: #f24b07;
}
.menu {
  position: absolute;
  right: 80px;
  top: 24px;
  z-index: 999;
}
.menu ul li {
  display: inline-block;
  padding: 0px 0px;
}
.menu ul a {
  padding: 12px 20px;
  box-sizing: border-box;
  display: block;
  font: inherit;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s;
}
.menu ul a:hover,
.menu ul a.selected {
  border-color: #f24b07;
}
.txt1 {
  font-size: 16px;
  text-decoration: none;
  color: #f24b07;
}
.link1 {
  font-size: 14px;
  color: #666;
  text-decoration: none;
}
.footer {
  position: relative;
  padding: 24px;
  width: 100%;
  text-align: center;
}