*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  :root {
    --violet: #7B2FBE;
    --gold: #F5C518;
    --gold-light: #e8c98e;
    --white: #ffffff;
    --off-white: #f0ede8;
    --dark: #050A14;
    --dark-mid: #071020;
    --card-bg: #0a1428;
    --border: rgba(200,169,110,0.2);
    --text-muted: #888;
    --text-body: #bbb;
  }

  body {
    font-family: 'Noto Sans JP', sans-serif;
    background: var(--dark);
    color: var(--white);
    overflow-x: hidden;
    line-height: 1.8;
  }

  /* ===== NOISE OVERLAY ===== */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
    opacity: 0.4;
  }

  /* ===== NAV ===== */
  nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    height: 64px;
    background: rgba(5,4,3,0.5);
    backdrop-filter: blur(4px);
  }

  .nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
  }

  .nav-logo-icon {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .nav-logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.25;
  }

  .nav-logo-en {
    font-size: 9.5px;
    letter-spacing: 0.2em;
    color: var(--gold);
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 300;
  }

  .nav-logo-ja {
    font-size: 14px;
    color: var(--gold);
    font-family: 'Shippori Mincho', serif;
    font-weight: 700;
    letter-spacing: 0.02em;
  }

  .nav-cta {
    color: white;
    border: none;
    padding: 12px 28px;
    font-size: 13px;
    font-family: 'Noto Sans JP', sans-serif;
    letter-spacing: 0.06em;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    font-weight: 500;
  }

  .nav-cta:hover { transform: translateY(-3px);}

  /* ============ HERO ============ */
  #hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
  }

  .page-hero {
    margin-top: 64px;
    background: linear-gradient(--card-bg);
    width: 1100px;
    margin: 0 auto;
    padding: 80px 140px 48px;
    border-bottom: 1px solid var(--border);
  }
  .page-hero-label {
    font-size: 11px; font-weight: 600; color: var(--off-white);
    letter-spacing: 0.1em; text-transform: uppercase;
    margin-bottom: 10px; display: block;
  }
  .page-hero h1 { font-size: 36px; font-weight: 900; color: var(--text-dark); }
  .main-wrap { max-width: 860px; margin: 0 auto; padding: 60px 40px 100px; }
  .container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 12px;
  }
  .intro-text {
    font-size: 14px; color: var(--text-gray); line-height: 1.9;
    margin-bottom: 40px;
  }
  .num-h {
    font-size: 15px; font-weight: 700; color: var(--text-dark);
    margin: 32px 0 12px;
  }
  p { font-size: 14px; color: var(--text-gray); line-height: 1.9; margin-bottom: 12px; }
  p:last-child { margin-bottom: 0; }
  ul { padding-left: 24px; margin-bottom: 16px; }
  li { font-size: 14px; color: var(--text-gray); line-height: 1.9; margin-bottom: 8px; }
  .indent { padding-left: 20px; margin-bottom: 8px; }
  .indent p { margin-bottom: 4px; }
  .contact-box {
    border: 1px solid #ccc; border-radius: 4px;
    padding: 24px 28px; margin: 20px 0;
    font-size: 14px; color: var(--text-gray); line-height: 2.2;
  }
  .sign-right {
    text-align: right; font-size: 14px;
    color: var(--text-gray); margin-top: 40px;
  }
  
  /* ===== FOOTER ===== */
  footer {
    background: #050A14;
    border-top: 1px solid var(--border);
    padding: 32px 0 32px;
    display: block;
  }

  .footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
    color: #444;
  }

  /* ===== RESPONSIVE ===== */
  @media (max-width: 680px) {
    nav { padding: 16px 20px; }
    .nav-links { display: none; }
    .page-hero {
      width: 100%;
      max-width: 100%;
      margin: 0;
      padding: 80px 20px 32px; /* ← スマホに最適化した余白 */
      box-sizing: border-box;
    }
    .container { padding: 0 10px; }
    .about-layout,
    .activities-grid,
    .companies-grid,
    .club-layout,
    .cta-layout,
    .footer-top { grid-template-columns: 1fr; gap: 32px; }
    .stats-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .page-hero h1 { font-size: 32px; }
    section { padding: 64px 0; }
    .footer-bottom {
      flex-direction: column;
      align-items: center; 
      gap: 8px; 
    }
  }