#page-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  font-size: 77%;
}

#page-top a {
  background: #666;
  text-decoration: none;
  color: #fff;
  width: 100px;
  padding: 30px 0;
  text-align: center;
  display: block;
  border-radius: 5px;
  pointer-events: none;
}

#page-top a :hover {
  text-decoration: none;
  background: #999;
}

.gear {
  position: fixed;
  bottom: -17px;
  left: 0px;
  z-index: 5;
  pointer-events: none;
}

.gear .i1 {
  position: fixed;
  width: 110px;
  bottom: -7px;
  left: -8px;
}

.gear .i2 {
  position: fixed;
  width: 100px;
  bottom: -2px;
  left: -3px;
}

.gear .i3 {
  position: fixed;
  width: 90px;
  bottom: 4px;
  left: 2px;
}

.flow_left {
  position: relative;
  left: 0px;
}

.tool {
  display: inline-block;
}

.tool video {
  height: 500px;
}

.tool img {
  height: 500px;
}

.tool-info {
  font-size: 0.6em;
}