@font-face {
      font-family: "Yellowtail";
      src: url("Yellowtail-Regular.ttf") format("truetype");
      font-weight: 400;
      font-style: normal;
      font-display: swap;
    }
    :root {
      --navy: #0F1C2E;
      --navy-mid: #1A3350;
      --navy-soft: #E8EEF4;
      --teal: #2A6F7A;
      --teal-light: #E6F2F4;
      --gold: #B8954A;
      --gold-bg: #FFF8E8;
      --ink: #1A2332;
      --muted: #5C6B7A;
      --soft: #F4F7FA;
      --line: #D0D7DE;
      --white: #FFFFFF;
      --cream: #F8F4EF;
      --shadow: 0 10px 30px rgba(15, 28, 46, 0.08);
      --radius: 16px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--soft);
      font-family: Helvetica, Arial, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      line-height: 1.6;
      font-size: 17px;
    }
    a { color: var(--teal); }
    img { max-width: 100%; height: auto; display: block; }
    .script {
      font-family: "Yellowtail", "Brush Script MT", cursive;
      font-weight: 400;
      letter-spacing: 0.01em;
    }
    .wrap {
      width: min(1080px, calc(100% - 2rem));
      margin: 0 auto;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      backdrop-filter: blur(10px);
      background: rgba(244, 247, 250, 0.92);
      border-bottom: 1px solid var(--line);
    }
    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      padding: 0.85rem 0;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      text-decoration: none;
      color: var(--navy);
      font-weight: 700;
    }
    .nav-brand img { width: 42px; height: 42px; object-fit: contain; }
    .nav-links {
      display: flex;
      flex-wrap: wrap;
      gap: 0.35rem 1rem;
      align-items: center;
      font-size: 0.92rem;
    }
    .nav-links a {
      text-decoration: none;
      color: var(--muted);
      font-weight: 600;
    }
    .nav-links a:hover { color: var(--navy); }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.4rem;
      padding: 0.85rem 1.25rem;
      border-radius: 999px;
      text-decoration: none;
      font-weight: 700;
      font-size: 0.95rem;
      border: 2px solid transparent;
      transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
    }
    .btn:hover { transform: translateY(-1px); }
    .btn-primary {
      background: var(--navy);
      color: var(--white);
    }
    .btn-primary:hover { background: var(--navy-mid); color: var(--white); }
    .btn-secondary {
      background: transparent;
      color: var(--navy);
      border-color: var(--navy);
    }
    .btn-secondary:hover { background: var(--navy); color: var(--white); }
    .btn-gold {
      background: var(--gold);
      color: var(--navy);
    }
    .btn-gold:hover { filter: brightness(1.05); color: var(--navy); }
    .hero {
      padding: 3.5rem 0 2.5rem;
      background:
        radial-gradient(circle at top right, rgba(184, 149, 74, 0.18), transparent 35%),
        linear-gradient(180deg, #ffffff 0%, var(--soft) 100%);
    }
    .hero-grid {
      display: grid;
      gap: 2.5rem;
      align-items: center;
    }
    @media (min-width: 900px) {
      .hero-grid { grid-template-columns: 1.15fr 0.85fr; }
    }
    .eyebrow {
      display: inline-block;
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--teal);
      margin-bottom: 0.85rem;
    }
    h1 {
      margin: 0 0 1rem;
      color: var(--navy);
      font-size: clamp(2.1rem, 5vw, 3.4rem);
      line-height: 1.12;
      letter-spacing: -0.02em;
    }
    .lede {
      font-size: 1.12rem;
      color: var(--muted);
      max-width: 38rem;
      margin: 0 0 1.5rem;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 0.75rem;
      margin-bottom: 1.25rem;
    }
    .price-pill {
      display: inline-flex;
      flex-wrap: wrap;
      gap: 0.55rem;
      align-items: center;
      padding: 0.7rem 1rem;
      border-radius: 999px;
      background: var(--gold-bg);
      border: 1px solid rgba(184, 149, 74, 0.35);
      color: var(--navy);
      font-size: 0.92rem;
      font-weight: 600;
    }
    .hero-card {
      background: var(--navy);
      color: var(--white);
      border-radius: 24px;
      padding: 1.75rem;
      box-shadow: var(--shadow);
    }
    .hero-card img.wide {
      width: 100%;
      max-height: 140px;
      object-fit: contain;
      margin: 0 auto 1.25rem;
      filter: drop-shadow(0 8px 18px rgba(0,0,0,0.25));
    }
    .stat-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0.75rem;
    }
    .stat {
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: 14px;
      padding: 0.9rem 0.75rem;
      text-align: center;
    }
    .stat strong {
      display: block;
      font-size: 1.45rem;
      color: var(--gold);
      line-height: 1.1;
      margin-bottom: 0.25rem;
    }
    .stat span {
      font-size: 0.78rem;
      color: rgba(255,255,255,0.78);
    }
    section {
      padding: 3.5rem 0;
    }
    .section-kicker {
      color: var(--teal);
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      margin: 0 0 0.6rem;
    }
    h2 {
      margin: 0 0 0.85rem;
      color: var(--navy);
      font-size: clamp(1.6rem, 3vw, 2.2rem);
      line-height: 1.2;
    }
    .section-intro {
      max-width: 42rem;
      color: var(--muted);
      margin: 0 0 1.75rem;
    }
    .engine {
      display: grid;
      gap: 1rem;
    }
    @media (min-width: 800px) {
      .engine { grid-template-columns: repeat(2, 1fr); }
    }
    .engine-card {
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 1.25rem 1.3rem;
      box-shadow: var(--shadow);
    }
    .engine-card .num {
      width: 2rem;
      height: 2rem;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--teal-light);
      color: var(--teal);
      font-weight: 800;
      font-size: 0.9rem;
      margin-bottom: 0.7rem;
    }
    .engine-card h3 {
      margin: 0 0 0.4rem;
      color: var(--navy);
      font-size: 1.05rem;
    }
    .engine-card p {
      margin: 0;
      color: var(--muted);
      font-size: 0.95rem;
    }
    .callout {
      margin-top: 1.5rem;
      background: var(--cream);
      border: 1px solid #e5d8c8;
      border-left: 5px solid var(--navy);
      border-radius: 14px;
      padding: 1.2rem 1.3rem;
    }
    .callout strong { color: var(--navy); }
    .inside {
      display: grid;
      gap: 1rem;
    }
    @media (min-width: 800px) {
      .inside { grid-template-columns: repeat(3, 1fr); }
    }
    .inside-card {
      background: var(--white);
      border-radius: var(--radius);
      border: 1px solid var(--line);
      padding: 1.35rem;
    }
    .inside-card h3 {
      margin: 0 0 0.5rem;
      color: var(--navy);
      font-size: 1.05rem;
    }
    .inside-card p {
      margin: 0;
      color: var(--muted);
      font-size: 0.95rem;
    }
    .library {
      background: var(--white);
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }
    .filters {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-bottom: 1.25rem;
    }
    .chip {
      border: 1px solid var(--line);
      background: var(--soft);
      color: var(--muted);
      border-radius: 999px;
      padding: 0.45rem 0.85rem;
      font-size: 0.85rem;
      font-weight: 700;
    }
    .guide-grid {
      display: grid;
      gap: 0.85rem;
    }
    @media (min-width: 700px) {
      .guide-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (min-width: 1000px) {
      .guide-grid { grid-template-columns: repeat(3, 1fr); }
    }
    .guide {
      border: 1px solid var(--line);
      border-radius: 14px;
      padding: 1rem 1.05rem;
      background: var(--soft);
      min-height: 118px;
    }
    a.guide { text-decoration: none; color: inherit; display: flex; flex-direction: column; padding: 0; overflow: hidden; background: var(--white); transition: transform 0.15s ease, box-shadow 0.15s ease; }
    a.guide:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
    .guide .cover { width: 100%; aspect-ratio: 1800 / 920; object-fit: cover; background: var(--navy-soft); border-bottom: 1px solid var(--line); }
    .guide-body { padding: 0.95rem 1.05rem 1.1rem; }
    .guide { min-height: 0; }

    .guide .label {
      font-size: 0.72rem;
      font-weight: 800;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--teal);
      margin-bottom: 0.35rem;
    }
    .guide h3 {
      margin: 0 0 0.35rem;
      font-size: 1rem;
      color: var(--navy);
    }
    .guide p {
      margin: 0;
      color: var(--muted);
      font-size: 0.88rem;
    }
    .pricing {
      display: grid;
      gap: 1rem;
    }
    @media (min-width: 820px) {
      .pricing { grid-template-columns: 1.1fr 0.9fr; }
    }
    .price-card {
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: 20px;
      padding: 1.6rem;
      box-shadow: var(--shadow);
    }
    .price-card.vip {
      background: linear-gradient(160deg, var(--navy) 0%, var(--navy-mid) 100%);
      color: var(--white);
      border: none;
    }
    .price-card h3 {
      margin: 0 0 0.4rem;
      font-size: 1.25rem;
    }
    .price-card .amount {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--gold);
      margin: 0.4rem 0 0.75rem;
      line-height: 1;
    }
    .price-card.vip .amount { color: var(--gold); }
    .price-card ul {
      margin: 0 0 1.25rem;
      padding-left: 1.15rem;
      color: var(--muted);
    }
    .price-card.vip ul { color: rgba(255,255,255,0.86); }
    .price-card li { margin-bottom: 0.45rem; }
    .about {
      display: grid;
      gap: 1.5rem;
      align-items: center;
    }
    @media (min-width: 800px) {
      .about { grid-template-columns: 180px 1fr; }
    }
    .about img {
      width: 160px;
      height: 160px;
      border-radius: 50%;
      object-fit: cover;
      border: 4px solid var(--white);
      box-shadow: var(--shadow);
      margin: 0 auto;
    }
    .cta-band {
      background: var(--navy);
      color: var(--white);
      border-radius: 24px;
      padding: 2rem;
      display: grid;
      gap: 1rem;
      align-items: center;
    }
    @media (min-width: 800px) {
      .cta-band {
        grid-template-columns: 1fr auto;
        padding: 2.25rem 2.4rem;
      }
    }
    .cta-band h2 { color: var(--white); margin-bottom: 0.4rem; }
    .cta-band p { margin: 0; color: rgba(255,255,255,0.8); }
    .cta-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; }
    footer {
      padding: 2.5rem 0 3rem;
      color: var(--muted);
      font-size: 0.9rem;
    }
    footer .foot-grid {
      display: grid;
      gap: 1rem;
      border-top: 1px solid var(--line);
      padding-top: 1.5rem;
    }
    @media (min-width: 800px) {
      footer .foot-grid {
        grid-template-columns: 1.4fr 1fr;
        align-items: start;
      }
    }
    .disclaimer {
      font-size: 0.85rem;
      color: var(--muted);
      background: var(--navy-soft);
      border-radius: 12px;
      padding: 0.9rem 1rem;
    }
  
    /* ---- guide landing pages ---- */
    .crumbs { font-size: 0.85rem; color: var(--muted); margin-bottom: 1rem; }
    .crumbs a { color: var(--muted); text-decoration: none; }
    .crumbs a:hover { color: var(--navy); }
    .g-hero { padding: 2.5rem 0 2rem; background: radial-gradient(circle at top right, rgba(184,149,74,0.18), transparent 35%), linear-gradient(180deg,#fff 0%,var(--soft) 100%); }
    .g-grid { display: grid; gap: 2rem; align-items: center; }
    @media (min-width: 900px) { .g-grid { grid-template-columns: 1fr 1fr; } }
    .g-cover { border-radius: 18px; box-shadow: var(--shadow); border: 1px solid var(--line); width: 100%; aspect-ratio: 1800/920; object-fit: cover; }
    .g-tagline { font-size: 1.15rem; color: var(--navy); font-weight: 700; margin: 0 0 0.75rem; }
    .fit-list { margin: 0 0 1.25rem; padding-left: 1.15rem; color: var(--muted); }
    .fit-list li { margin-bottom: 0.35rem; }
    .teasers { display: grid; gap: 1rem; }
    @media (min-width: 760px) { .teasers { grid-template-columns: 1fr 1fr; } }
    .teaser { background: var(--white); border: 1px solid var(--line); border-left: 5px solid var(--gold); border-radius: var(--radius); padding: 1.2rem 1.3rem; box-shadow: var(--shadow); }
    .teaser .tag { font-size: 0.72rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; color: var(--teal); }
    .teaser h3 { margin: 0.3rem 0 0.35rem; color: var(--navy); font-size: 1.05rem; }
    .teaser p { margin: 0; color: var(--muted); font-size: 0.95rem; }
    .note { font-size: 0.88rem; color: var(--muted); margin-top: 0.9rem; }
    .buy-box { background: var(--white); border: 1px solid var(--line); border-radius: 20px; padding: 1.5rem; box-shadow: var(--shadow); }
    .buy-box .amount { font-size: 2rem; font-weight: 800; color: var(--gold); line-height: 1; margin: 0.25rem 0 0.5rem; }
    .related { display: grid; gap: 0.85rem; }
    @media (min-width: 760px) { .related { grid-template-columns: repeat(3, 1fr); } }
    .faq details { background: var(--white); border: 1px solid var(--line); border-radius: 14px; padding: 0.9rem 1.1rem; margin-bottom: 0.7rem; }
    .faq summary { cursor: pointer; font-weight: 700; color: var(--navy); }
    .faq p { color: var(--muted); margin: 0.6rem 0 0; }