html {
  margin: 0;
  padding: 0;
  height: 100%;
  min-width: 900px;
}
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  min-width: 900px;
}
.bg_right{
  position: relative;
  float: right;
  margin: 0;
  padding: 0;
  width: 50%;
  height: 100%;
}
.bg_left {
  float: left;
  margin: 0;
  padding:0;
  width: 50%;
  height:100%;
  background-image: url("/img/t-min.jpg");
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-position: left center;
  z-index: -1;
}
.bg_left_opacity {
  width: 100%;
  height:100%;
  background-color:rgba(22,64,152,.3);
  z-index: 0;
}
.left_title {
  margin: 0;
  left: 15%;
  position: absolute;
  top: 30%;
  width: 255px;
  color: #fff;
  font-size: 24px;
  font-weight: bold;
  text-align: right;
  z-index: 2;
}
.left_subtitle{
  margin: 0;
  left: 15%;
  position: absolute;
  top: 45%;
  width: 255px;
  color: #fff;
  font-size: 20px;
  text-align: right;
  z-index: 2;
}
.button_area {
  position: absolute;
  right: 0;
  top:30%;
  margin: 0;
  padding:0;
  width: 100%;
  text-align: center;
}
.button {
  display: block;
  border: none;
  border-radius: 4px;
  margin: auto;
  margin-bottom: 50px;
  padding: 5px 12px;
  background-color: #fff;
  box-shadow: 2px 2px 4px rgba(22,64,152, .2);
  color: rgba(22,64,152, .9);
  font-size: 16px;
  cursor: pointer;
}
.button:hover {
  transition-duration: 0.2s;
  background-color: rgba(22,64,152, .9);
  color: #fff;
}

.clearfix::after{
  content: "";
  display: block;
}