/* ── リセット & ベース ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Helvetica Neue', 'Noto Sans JP', sans-serif;
  color: #333;
  background: #fafafa;
  line-height: 1.7;
}
a { color: #e65100; text-decoration: none; transition: color .2s; }
a:hover { color: #ff9800; }
img { max-width: 100%; height: auto; }

/* ── ヘッダー ── */
.header {
  position: fixed; top: 0; width: 100%; z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #eee;
  box-shadow: 0 1px 8px rgba(0,0,0,.06);
}
.header-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px;
}
.logo {
  font-size: 1.4rem; font-weight: 700;
  color: #e65100;
}
.nav { display: flex; gap: 28px; list-style: none; }
.nav a { color: #555; font-size: .9rem; font-weight: 500; }
.nav a:hover { color: #e65100; }
.hamburger { display: none; background: none; border: none; color: #333; font-size: 1.5rem; cursor: pointer; }

/* ── ヒーロー ── */
.hero {
  min-height: 80vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #fff5e6 0%, #fff 50%, #e8f5e9 100%);
  padding: 120px 24px 80px;
}
.hero h1 {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 16px;
  color: #333;
}
.hero p { font-size: 1.05rem; color: #777; max-width: 600px; margin: 0 auto 32px; }
.btn-primary {
  display: inline-block;
  padding: 14px 36px;
  background: linear-gradient(135deg, #ff9800, #ff5722);
  color: #fff; font-weight: 700; font-size: 1rem;
  border-radius: 10px;
  transition: transform .2s, box-shadow .2s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,152,0,.3);
  color: #fff;
}

/* ── セクション共通 ── */
.section {
  max-width: 1100px; margin: 0 auto;
  padding: 60px 24px;
}
.section-title {
  font-size: 1.6rem; font-weight: 700;
  color: #333;
  margin-bottom: 8px;
}
.section-sub { color: #999; margin-bottom: 36px; }
.divider {
  border: none; height: 1px;
  background: linear-gradient(90deg, transparent, #e0e0e0, transparent);
  margin: 0;
}

/* ── フッター ── */
.footer {
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid #eee;
  color: #aaa;
  font-size: .85rem;
  background: #fff;
}

/* ── レスポンシブ ── */
@media (max-width: 768px) {
  .nav { display: none; }
  .hamburger { display: block; }
  .nav.open {
    display: flex; flex-direction: column;
    position: absolute; top: 60px; right: 24px;
    background: #fff;
    padding: 20px; border-radius: 12px;
    gap: 16px;
    box-shadow: 0 8px 30px rgba(0,0,0,.1);
  }
}