body {
  font-family: 'Noto Sans JP', sans-serif;
  margin: 0;
  padding: 0;
  background: #f9fbfd;
  color: #333;
  line-height: 1.6;
}
header {
  display: flex;
  align-items: center;
  padding: 1rem 2rem;
  background: linear-gradient(90deg, #4da6ff, #80c7ff);
  color: white;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}
header .logo {
  height: 50px;
  margin-right: 1rem;
}
.hero {
  position: relative;
  height: 320px;
  background: linear-gradient(to bottom right, #e6f3ff, #ffffff);
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: #004080;
}
.hero-overlay {
  background: rgba(255,255,255,0.7);
  padding: 2rem;
  border-radius: 20px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}
.hero h2 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}
.hero p {
  font-size: 1rem;
  color: #333;
}
.about, footer {
  padding: 2.5rem 2rem;
}
section {
  margin-bottom: 2rem;
}
button, .btn {
  display: inline-block;
  background: #4da6ff;
  color: white;
  padding: 0.7rem 1.5rem;
  border: none;
  border-radius: 2rem;
  cursor: pointer;
  font-weight: bold;
  box-shadow: 0 3px 6px rgba(0,0,0,0.1);
  transition: all 0.2s;
}
button:hover, .btn:hover {
  background: #3399ff;
  transform: translateY(-2px);
}
.card {
  background: white;
  border: 1px solid #e6f0fa;
  border-radius: 1.5rem;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
footer {
  background: #4da6ff;
  color: white;
  text-align: center;
  font-size: 0.9rem;
}