/* NIT route: cobalt, graphite, signal orange and mint. */
body.book-nit {
  --ink: #243746;
  --muted: #667883;
  --line: #d7e0e4;
  --paper: #fcfdfb;
  --mist: #edf4f5;
  --brand: #236b80;
  --brand-strong: #154b5d;
  --brand-soft: #dceef1;
  --accent: #d56b3e;
  --accent-soft: #fae7df;
  --blue: #4d829a;
  --blue-soft: #e1eff3;
  --shadow: 0 18px 46px rgba(21, 75, 93, 0.14);
  --stage: #1d303b;
  --stage-ink: #f5f8f3;
  --stage-muted: rgba(245, 248, 243, 0.7);
  --stage-line: rgba(245, 248, 243, 0.2);
  --stage-accent: #e0b64f;
  --stage-acid: #afd0ba;
  --stage-secondary: #d56b3e;
  --stage-surface: #fcfdfb;
  --stage-surface-strong: #e4f1f2;
  --stage-surface-line: #d7e0e4;
  background: #edf4f5;
}

body.book-nit::before {
  background:
    repeating-linear-gradient(90deg, rgba(35, 107, 128, 0.045) 0 1px, transparent 1px 60px),
    repeating-linear-gradient(0deg, rgba(213, 107, 62, 0.028) 0 1px, transparent 1px 60px);
  opacity: 0.72;
}

body.book-nit .brand-mark {
  color: #e0b64f;
  border-color: #e0b64f;
  box-shadow: 5px 5px 0 #d56b3e;
}

body.book-nit .hero-band::before { content: "NIT / 22"; }
body.book-nit .hero-band::after {
  content: "技";
  color: transparent;
  -webkit-text-stroke-color: rgba(224, 182, 79, 0.22);
  font-family: "Microsoft YaHei", sans-serif;
}
body.book-nit .book-preview::after { content: "SOURCE / 10P"; }
body.book-nit .hero-band .primary-button,
body.book-nit .primary-button { box-shadow: 5px 5px 0 #d56b3e; }
body.book-nit .hero-band .primary-button:hover,
body.book-nit .primary-button:hover { box-shadow: 1px 1px 0 #d56b3e; }
body.book-nit .stat::before,
body.book-nit .course-item::before,
body.book-nit .practice-item::before,
body.book-nit .paper-card::before,
body.book-nit .progress-bar span,
body.book-nit .quiz-meter span { background: #d56b3e; }
body.book-nit .hero-grid h1,
body.book-nit .focus-card h2,
body.book-nit .stat strong { letter-spacing: 0; }
body.book-nit .section:nth-of-type(odd) { background: rgba(255, 255, 255, 0.64); }

@media (max-width: 720px) {
  body.book-nit .hero-band::after { font-size: 180px; }
}