@charset "UTF-8";

 :root{
    --teal:#00E1DA; --teal-deep:#1C8FA0; --teal-text:#189E86; --teal-text-hover:#084F49;
    --teal-bg:#EAF8F6; --card-border:#D8EEEC;
    --ink:#17242A; --ink-soft:#22383D; --ink-mute:#4C5C60; --ink-faint:#7C8C8F; --ink-faintest:#AEB8B9;
    --red:#E23B2E; --red-hover:#C42B1F; --blue:#1E5FA8; --blue-bg:#EAF1FB;
  }
  *{box-sizing:border-box}
  body{margin:0;background:#fff;color:var(--ink);font-family:'Noto Sans JP',sans-serif;-webkit-font-smoothing:antialiased}
  
/* 横揺れ防止 */
html, body {
  overflow-x: hidden;
  width: 100%;
}
  a{color:var(--teal-text);text-decoration:none}
  a:hover{color:var(--teal-text-hover)}
  img{max-width:100%}

/* hero banner */
  .hero-banner{position:relative;padding:76px 56px;background:linear-gradient(135deg,var(--teal),var(--teal-deep));overflow:hidden}
  .banner-circle{position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,0.24);pointer-events:none}
  .circle-tl{top:-8%;left:-6%;width:34%;aspect-ratio:1;border-color:rgba(255,255,255,0.28)}
  .circle-tl-small{top:14%;left:6%;width:12%;aspect-ratio:1;border-color:rgba(255,255,255,0.22)}
  .circle-br{bottom:-18%;right:-4%;width:42%;aspect-ratio:1;border-color:rgba(255,255,255,0.2)}
  .circle-br-small{bottom:10%;right:16%;width:16%;aspect-ratio:1;border-color:rgba(255,255,255,0.3)}
  .banner-calligraphy{position:absolute;top:50%;right:2%;width:24%;height:auto;transform:translateY(-50%);opacity:0.28;pointer-events:none}
  .hero-inner{position:relative;z-index:1;max-width:760px;margin:0 auto;text-align:center}
  .hero-eyebrow{font-size:11px;letter-spacing:0.25em;color:#DFFBF7;margin-bottom:14px}
  .hero-title{margin:0;font-family:'Zen Old Mincho',serif;font-weight:700;font-size:34px;letter-spacing:0.06em;line-height:1.5;color:#fff;text-shadow:0 1px 6px rgba(8,30,32,0.2)}

  /* breadcrumb */
  .breadcrumb{padding:16px 56px;border-bottom:1px solid rgba(23,36,42,0.06);font-size:12px;color:var(--ink-faint);display:flex;align-items:center;gap:8px;flex-wrap:wrap}

  /* article */
  .article{padding:72px 56px;max-width:680px;margin:0 auto}
  .article p{margin:0 0 24px;font-size:15px;line-height:2.1;color:var(--ink-soft)}
  .article h2{margin:0 0 20px;font-family:'Shippori Mincho',serif;font-weight:600;font-size:22px;line-height:1.6;color:var(--ink)}
  .pain-list{display:flex;flex-direction:column;gap:0;margin-bottom:30px}
  .pain-list div{font-size:14.5px;color:var(--ink-mute);padding:12px 0;border-bottom:1px solid rgba(23,36,42,0.08)}
  .pain-list div:last-child{border-bottom:none}
  .insight-card{background:var(--teal-bg);padding:36px;border-radius:4px;margin-bottom:44px;display:flex;flex-direction:column;gap:12px;font-size:14px;line-height:1.9;color:var(--ink-soft)}
  .change-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:44px}
  .change-card{padding:18px 20px;background:#fff;border:1px solid var(--card-border);border-radius:4px;font-size:13.5px;color:var(--ink-mute)}
  .change-card.full{grid-column:1 / -1}
  .summary-card{background:var(--teal-bg);padding:40px;border-radius:4px;margin-bottom:44px}
  .summary-card p{font-size:15px;line-height:2}
  .cite-note{font-size:12px;color:var(--ink-faintest);margin-bottom:48px}
  .book-card{display:flex;align-items:center;gap:20px;padding:22px;background:#fff;border:1px solid var(--card-border);border-radius:4px;margin-bottom:16px;transition:border-color .15s ease,transform .15s ease}
  .book-card:hover{border-color:var(--teal);transform:translateY(-2px)}
  .book-card img{width:78px;height:auto;flex-shrink:0}
  .book-card-title{font-family:'Shippori Mincho',serif;font-size:15px;color:var(--ink);margin-bottom:6px}
  .book-card-cta{font-size:12.5px;color:var(--teal-text)}

  /* related */
  .related-section{padding:0 56px 80px}
  .related-section h2{margin:0 0 24px;text-align:center;font-family:'Shippori Mincho',serif;font-weight:600;font-size:22px;color:var(--ink)}
  .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;max-width:960px;margin:0 auto}
  .related-card{display:block;background:#fff;border:1px solid var(--card-border);border-radius:4px;padding:22px;transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}
  .related-card:hover{transform:translateY(-4px);box-shadow:0 10px 24px rgba(23,36,42,0.1);border-color:var(--teal)}
  .related-card-title{font-family:'Shippori Mincho',serif;font-size:15.5px;color:var(--ink);margin-bottom:8px}
  .related-card-cta{font-size:12px;color:var(--teal-text)}

  /* CTA banner */
  .cta-banner{padding:64px 56px;background:linear-gradient(135deg,var(--teal),var(--teal-deep));text-align:center}
  .cta-banner h2{margin:0 0 12px;font-family:'Shippori Mincho',serif;font-weight:600;font-size:24px;color:#fff;text-shadow:0 1px 6px rgba(8,30,32,0.2)}
  .cta-banner p{margin:0 0 28px;font-size:13.5px;color:rgba(255,255,255,0.95);text-shadow:0 1px 6px rgba(8,30,32,0.25)}
  .cta-button{display:inline-block;font-size:14px;padding:15px 38px;background:var(--red);color:#fff;border-radius:999px;letter-spacing:0.03em;transition:background .15s ease,transform .15s ease}
  .cta-button:hover{background:var(--red-hover);color:#fff;transform:translateY(-2px)}


  /* ===== tablet (720–979px): 3-col grids become 2-col ===== */
  @media (max-width:979px){
    .related-grid{grid-template-columns:1fr 1fr}
    .banner-calligraphy{right:-4%;width:30%}
  }

  /* ===== mobile (<720px) ===== */
  @media (max-width:719px){
    .hero-banner{padding:56px 20px}
    .hero-title{font-size:26px}
    .circle-tl-small,.circle-br-small,.banner-calligraphy{display:none}
    .breadcrumb{padding:14px 20px}
    .article{padding:48px 20px}
    .change-grid{grid-template-columns:1fr}
    .change-card.full{grid-column:auto}
    .related-section{padding:0 20px 48px}
    .related-grid{grid-template-columns:1fr}
    .cta-banner{padding:48px 20px}
    .cta-banner h2 span {
        display: inline-block;
    }

    .book-card{flex-direction:column;align-items:flex-start}
  }