:root {
      --bg: #f7f8fb; --card: #ffffff; --text: #172033; --muted: #5d667a;
      --line: #e6e9f0; --accent: #3157d5; --accent-soft: #eef2ff;
    }
    * { box-sizing: border-box; }
    body { margin: 0; font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); line-height: 1.65; }
    header { background: linear-gradient(135deg, #172033 0%, #3157d5 100%); color: white; padding: 48px 20px 36px; }
    .wrap { max-width: 1040px; margin: 0 auto; }
    .eyebrow { font-size: 14px; letter-spacing: .08em; text-transform: uppercase; opacity: .82; }
    h1 { margin: 10px 0 8px; font-size: clamp(32px, 5vw, 52px); line-height: 1.08; }
    .meta { color: rgba(255,255,255,.86); margin: 0; }
    nav { background: white; border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 2; }
    nav .wrap { display: flex; gap: 8px; overflow-x: auto; padding: 10px 20px; }
    nav a { white-space: nowrap; text-decoration: none; color: var(--muted); padding: 9px 12px; border-radius: 999px; font-size: 14px; }
    nav a.active, nav a:hover { background: var(--accent-soft); color: var(--accent); }
    main { padding: 28px 20px 56px; }
    article { background: var(--card); border: 1px solid var(--line); border-radius: 22px; padding: clamp(22px, 4vw, 44px); box-shadow: 0 18px 50px rgba(23,32,51,.06); }
    h2 { margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--line); font-size: 24px; }
    h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
    h3 { margin-top: 24px; font-size: 18px; }
    p { margin: 10px 0; }
    ul { padding-left: 22px; }
    li { margin: 6px 0; }
    .notice { background: #fff8e6; border: 1px solid #f0d894; color: #5f4700; border-radius: 16px; padding: 14px 16px; margin: 18px 0; }
    .info-grid { display: grid; grid-template-columns: minmax(180px, 280px) 1fr; gap: 8px 18px; margin: 16px 0; }
    .info-grid dt { color: var(--muted); }
    .info-grid dd { margin: 0; font-weight: 600; }
    a { color: var(--accent); }
    footer { color: var(--muted); font-size: 14px; padding: 26px 20px 40px; text-align: center; }
    @media (max-width: 680px) { .info-grid { grid-template-columns: 1fr; gap: 2px; } .info-grid dd { margin-bottom: 10px; } }