body,
html {
  margin: 0;
  padding: 0;
  font-family: "Arial", sans-serif;
}

/* ヒーロイメージエリア */
.hero {
  background-image: url("images/hero.jpg");
  background-size: cover;
  background-position: center;
  width: 100%;
  padding-top: 56.25%;
  position: relative;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.5rem;
}

.box {
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: 5px;
}

.item {
  flex: 1;
  margin: 0 10px;
}

.item img {
  width: 100%;
  height: auto;
  display: block;
}
.content img {
  width: 100%;
  margin: auto;
  display: block;
}