html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  text-align: center;
  background: #f5f5f5;
}

.main-container {
  height: 100%;
  min-height: 600px;
  max-width: 750px;
  margin: auto;
  background: url(../images/bg.png) no-repeat;
  background-size: 100% 100%;
  position: relative;
}

.main-container.pc {
  min-height: 900px;
}

.top {
  position: relative;
  z-index: 999;
  padding: 60px 0 5px;
  font-size: 20px;
  font-weight: bold;
}

.top img {
  border-radius: 8px;
  max-width: 120px;
}

.content {
  position: relative;
  height:500px;
  z-index: 999;
  padding: 10px;
}

.content>div {
  margin-bottom: 8px;
  display: none;
}

.content img {
  width: 200px;
  cursor: pointer;
}

.bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.bottom img {
  max-width: 750px;
  width: 100%;
}

.show {
  display: block !important;
}