.icd-study-books{background:#fff;color:#111}
.icd-study-books *{box-sizing:border-box}
.icd-study-books-shell{max-width:1180px;margin:0 auto;padding:0 24px}
.icd-study-books-hero{padding:72px 0 48px;border-bottom:1px solid #eee;background:linear-gradient(180deg,#f7f7f7 0,#fff 100%)}
.icd-study-books-hero small{display:block;margin-bottom:13px;font-weight:900;letter-spacing:.14em;color:#777}
.icd-study-books-hero h1{max-width:850px;margin:0 0 18px;font-size:clamp(38px,6vw,72px);line-height:1.04;letter-spacing:-.055em}
.icd-study-books-hero p{max-width:700px;margin:0;color:#666;font-size:17px;line-height:1.8}
.icd-study-status{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.icd-study-status span{padding:8px 11px;border-radius:999px;background:#111;color:#fff;font-size:12px;font-weight:800}

.icd-study-book-section{padding:64px 0;border-bottom:1px solid #eee;scroll-margin-top:120px}
.icd-study-book-grid{display:grid;grid-template-columns:minmax(240px,360px) 1fr;gap:56px;align-items:center}
.icd-study-book-cover{display:block;width:100%;max-width:320px;height:auto;margin:auto;box-shadow:0 24px 58px rgba(0,0,0,.18)}
.icd-study-book-copy .eyebrow{display:inline-flex;margin-bottom:14px;padding:7px 10px;border:1px solid #ddd;border-radius:999px;font-size:11px;font-weight:900;color:#555}
.icd-study-book-copy h2{margin:0 0 14px;font-size:clamp(30px,4vw,52px);letter-spacing:-.05em}
.icd-study-book-copy .lead{margin:0 0 22px;color:#555;font-size:17px;line-height:1.8}
.icd-study-book-points{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:24px 0}
.icd-study-book-points div{padding:15px;border-radius:14px;background:#f7f7f7;border:1px solid #ececec}
.icd-study-book-points b{display:block;margin-bottom:5px;font-size:13px;color:#111}
.icd-study-book-points span{font-size:13px;color:#777;line-height:1.5}
.icd-study-book-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.icd-study-book-actions a,.icd-study-book-actions span{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border-radius:12px;font-size:14px;font-weight:900;text-decoration:none}
.icd-study-book-actions .read{background:#111;color:#fff}
.icd-study-book-actions .detail{border:1px solid #d8d8d8;background:#fff;color:#222}
.icd-study-book-actions .buy{background:#0f766e;color:#fff}
.icd-study-book-actions .waiting{border:1px dashed #bbb;background:#f5f5f5;color:#777}
.icd-study-book-note{margin-top:16px;color:#777;font-size:13px;line-height:1.6}
.icd-study-books-policy{padding:56px 0 72px;background:#111;color:#fff}
.icd-study-books-policy h2{margin:0 0 12px;font-size:30px;letter-spacing:-.04em}
.icd-study-books-policy p{max-width:720px;margin:0;color:#c9c9c9;line-height:1.8}
.icd-study-books-policy strong{color:#fff}

@media(max-width:900px){
  .icd-study-book-grid{grid-template-columns:1fr;gap:30px}
  .icd-study-book-cover{max-width:260px}
  .icd-study-book-points{grid-template-columns:1fr}
}
@media(max-width:560px){
  .icd-study-books-shell{padding:0 18px}
  .icd-study-books-hero{padding:48px 0 36px}
  .icd-study-books-hero h1{font-size:clamp(34px,11vw,48px)}
  .icd-study-books-hero p{font-size:15px}
  .icd-study-book-section{padding:46px 0}
  .icd-study-book-actions{display:grid;grid-template-columns:1fr}
  .icd-study-book-actions a,.icd-study-book-actions span{width:100%;min-height:46px}
}