body {
  font-family: "Noto Sans JP", sans-serif;
  color: #333;
  margin: 0;
  background-color: #fafafa;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 60px;
  background-color: #fff;
}

.logo h1 {
  font-size: 18px;
  line-height: 1.4;
}

.nav ul {
  display: flex;
  gap: 30px;
  list-style: none;
}

.nav a {
  text-decoration: none;
  color: #333;
}

.hero {
  position: relative;
  text-align: center;
}

.hero-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.hero-text {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translateX(-50%);
  color: #fff;
}

.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 20px;
  background-color: #4b6043;
  color: #fff;
  text-decoration: none;
  border-radius: 4px;
}

.concept, .service, .works {
  padding: 60px;
  text-align: center;
}

.service-grid, .works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.service-item, .works-grid div {
  background-color: #fff;
  padding: 20px;
  border-radius: 6px;
}

.footer {
  background-color: #4b6043;
  color: #fff;
  text-align: center;
  padding: 20px;
}