.flex-center{
  display: flex;
  align-items: center;
  justify-content: center;
}
.container-box{
  margin-top: 80px;
}
.header-img{
  width: 100%;
  height: 30vw;
  overflow: hidden;
}
.header-img img{
  width: 100%;
  height: 100%;
}