body {
  background-color: #fff;
  font-family: "Noto Sans Japanese";
  margin: 0;
} 

section {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: auto;
}

h1 {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translateX(-50%) translateY(-50%);
  font-size: 60px;
  color: #000;
  z-index: 1;
}

#particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: white;
  background-size: cover;
  background-position: 50% 50%;
  z-index: -1;
}

.beach {
  height: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.beach img {
  width: 30%;
  margin: 10px;
}