html,
body {
  min-height: 100%;
}
.about {
  margin-bottom: 100px;
}
.introduction {
  margin-left: 50px !important;
  margin-right: 50px !important;
}
.up2 > h1 {
  margin-left: 10%;
}
.up2 hr {
  height: 1px;
  border: none;
  border-top: 2px dotted #e1e1e1;
  width: 82%;
}
.imgtxt {
  text-align: center;
  /*border: 1px solid #000;*/
  border-radius: 5px;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  margin: 20px 15px;
  box-shadow: 0 10px 20px #8cbadf;
  padding-bottom: 20px;
}
.imgtxt img {
  margin-top: 50px;
  margin-bottom: 20px;
  width: 40%;
}
.imgtxt p {
  padding: 10px 50px;
  color: #4c4c4c;
  line-height: 23px;
}