/* ===================
  全体CSS
  =================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  color: #222;
  background: #f5f6f7;
}

/* ===== Layout ===== */
.wrapper {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
}

section {
  background: #fff;
  margin-top: 20px;
  padding: 30px;
  border-radius: 8px;
}

/* ===== Text ===== */
h2 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  border-left: 5px solid #0f172a;
  padding-left: 10px;
}

p {
  margin-bottom: 15px;
}

/* ===== INDEX Return ===== */
.hub-return {
  margin: 64px auto 40px;
  text-align: center;
}

.hub-return-button {
  display: inline-flex;
  align-items: center;
  gap: 12px;

  padding: 14px 28px;
  border: 1px solid #d4af37;
  border-radius: 6px;

  background: #0b0f1a;
  color: #e5e7eb;
  text-decoration: none;
  letter-spacing: 0.06em;

  transition: transform .15s ease, box-shadow .15s ease;
}

.hub-return-button img {
  width: 22px;
  height: 22px;
}

.hub-return-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 12px rgba(212,175,55,0.35);
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  body {
    font-size: 0.95rem;
  }
  section {
    padding: 20px;
  }
  .wrapper {
    padding: 12px;
  }
}

/* ===== Page Context ===== */
.page-context {
  max-width: 1000px;
  margin: 24px auto 0;
  padding: 0 20px;

  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: #9ca3af;
  text-transform: uppercase;
}