* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.s_img {
  width: 100vh;
  height: 500px;
  object-fit: cover;
}

a {
  text-decoration: none;
  color: inherit;
}

.img-container {
  position: relative;
}

.s_img.banner {
  filter: brightness(50%);
}

.btn.check {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.bg-img {
  background: url("./pic/back.jpg");
  background-size: cover;
}
.main {
  position: relative;
}
.check {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  width: 100%;
  padding: 200px;
  color: white;
}