body {
  padding: 0;
  margin: 0;
  background-color: #f7f8fb;
}

p {
  text-align: left;
  text-indent: 2em;
}
a {
  color: #959595;
  text-decoration: none;
}
h2 {
  text-align: center;
}
pre {
  width: 100vw;
}
.head_bg {
  width: 100vw;
}

.lls_kid {
  position: absolute;
  width: 8vw;
  height: 2vw;
  top: 2.5vw;
  right: 27vw;
}

.about_us {
  position: absolute;
  width: 5.6vw;
  height: 2vw;
  top: 2.5vw;
  right: 21vw;
}

.intro1 {
  width: 95vw;
  margin-top: 1vw;
}

.window {
  border-radius: 20px;
}
.footer {
  color: #959595;
  font-size: 12px;
  margin-top: 2vw;
  text-align: center;
}

.center {
  text-align: center;
}

.intro3 {
  width: 100vw;
}

.about a {
  position: absolute;
  width: 5vw;
  height: 1vw;
}

.header a,
.about a {
  color: transparent;
}

.about .introduce {
  width: 2.6vw;
  height: 2vw;
  top: 6vw;
  right: 27.4vw;
}

.about .business-license {
  width: 5.2vw;
  height: 2vw;
  top: 6vw;
  right: 20.8vw;
}