.container_gi {
  font-family: 'SourceHanSansCN-Light';
}

.flex {
  display: flex;
}

.flex-1 {
  flex: 1;
}

.flex-align-center {
  align-items: center;
}

.flex-justify-center {
  justify-content: center;
}

.container_gi img {
  width: 100%;
}

.part1 {
  position: relative;
  top: 0;
  width: 100%;
  height: 62rem;
  background: url(./img/part1_bg.png) no-repeat center/cover;
}

.part1_content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(6%, -80%);
  width: 24rem;
}

.part2 {
  position: relative;
  top: 0;
  width: 100%;
  height: 42rem;
  background: url(./img/part2_bg.png) no-repeat center/cover;
}

.part2 > .flex {
  height: 100%;
}

.part2 > .flex > div {
  width: 22%;
}

.part3 {
  position: relative;
  top: 0;
  width: 100%;
  background: url(./img/part3_bg.png) no-repeat right bottom/contain;
}

.part3_1 > img {
  display: block;
  width: 50%;
  margin: 5rem auto;
  margin-top: 10rem;
}

.part3_2 > img {
  display: block;
  width: 65%;
  margin: 5rem auto;
}

.part3_3 > img {
  display: block;
  width: 65%;
  margin: 5rem auto;
}

.part3_4 > img {
  display: block;
  width: 70%;
  margin: 10rem auto;
}

.part4 {
  position: relative;
  top: 0;
  width: 100%;
  padding: 1rem 0;
  background: url(./img/part4_bg.png) center center / contain;
}

.part4 > img {
  display: block;
  width: 50%;
  margin: 5rem auto;
}

.footer {
  padding: 2rem 0;
  background: #151c51;
  color: #fff;
  text-align: center;
}