/* Same chapter-list header and footer rules used by the anatomy module. */
.nav-quiz-link { white-space: nowrap; }
.home-section-header.has-subject-quiz-shortcut { display: flex !important; flex-direction: row !important; align-items: center !important; justify-content: space-between; gap: .75rem; margin: .35rem 0 .7rem !important; padding: .58rem .72rem !important; border: 1px solid rgba(125, 211, 252, .28) !important; border-radius: 12px; background: rgba(15, 35, 58, .58); }
.home-section-header.has-subject-quiz-shortcut h2 { flex: 1; min-width: 0; margin: 0 !important; padding: 0 !important; border: 0 !important; border-radius: 0 !important; background: none !important; box-shadow: none !important; color: #f1f5f9 !important; font-size: clamp(1.05rem, 4.4vw, 1.28rem) !important; white-space: nowrap; }
.subject-quiz-shortcut { display: inline-flex; flex: 0 0 auto; align-items: center; gap: .3rem; margin: 0; padding: .42rem .68rem; border: 1px solid rgba(125, 211, 252, .34); border-radius: 9px; background: rgba(56, 189, 248, .14); color: #dff4ff !important; text-decoration: none; font-size: .78rem; font-weight: 700; line-height: 1.2; white-space: nowrap; transition: transform .18s ease, background .18s ease; }
.subject-quiz-shortcut:hover { background: rgba(56, 189, 248, .2); transform: translateY(-1px); }
.site-footer.subject-footer { margin-top: 2.25rem !important; padding: 1.2rem 1rem !important; text-align: center; }
.subject-footer p { margin: 0 !important; }
.subject-footer-title { font-size: .9rem; font-weight: 700; line-height: 1.45; }
.subject-footer-note { margin-top: .3rem !important; font-size: .78rem; line-height: 1.5; opacity: .74; }
@media (max-width: 430px) { .home-section-header.has-subject-quiz-shortcut { gap: .45rem; padding: .52rem .56rem !important; } .home-section-header.has-subject-quiz-shortcut h2 { font-size: 1rem !important; } .subject-quiz-shortcut { padding: .4rem .5rem; font-size: .73rem; } }

/* 中医基础理论首页局部优化：触控、键盘可访问性与平板布局。 */

.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    clip-path: inset(50%) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.nav-hamburger {
    width: 44px;
    height: 44px;
    margin-left: 4px;
    padding: 12px 9px;
    border-radius: 8px;
}

.nav-hamburger:hover {
    background: rgba(255, 255, 255, .1);
}

.sidebar-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: 8px;
}

.home-section-header .subject-quiz-shortcut {
    min-height: 44px;
    padding: .55rem .72rem;
    font-size: .8rem;
}

:is(
    .top-nav a,
    .top-nav button,
    .chapter-card,
    .tool-card,
    .subject-home-bottom-link,
    .sidebar-link,
    .sidebar-close
):focus-visible {
    outline: 3px solid #7dd3fc;
    outline-offset: 3px;
}

/* 721–900px 仍保留双列，避免平板页面变成过长的单列。 */
@media (min-width: 721px) and (max-width: 900px) {
    .main-content.full-width .chapter-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .main-content.full-width .chapter-grid {
        grid-template-columns: 1fr;
    }
}

/* Course controls extend the shared subject layout without changing its typography. */
button, input, select { font: inherit; }
button { cursor: pointer; }
:is(.button, .search-panel input, .search-panel select, summary, .practice-card input):focus-visible { outline: 3px solid #38bdf8; outline-offset: 3px; }
[hidden] { display: none !important; }
html { scroll-padding-top: 64px; }
.skip-link { position: fixed; left: 1rem; top: -100px; z-index: 10001; padding: .6rem 1rem; background: #0f172a; color: white; }
.skip-link:focus { top: .5rem; }
.box-label { display: block; margin-bottom: .4rem; color: var(--primary-dark); font-size: .85rem; font-weight: 700; }
.chapter-intro p:last-child, .learning-intro p:last-child { margin-bottom: 0; }
.small-note { color: var(--gray-500); font-size: .8rem; line-height: 1.7; }
.sidebar-card .toc-list a.active { color: var(--primary); background: var(--primary-light); border-left-color: var(--primary); }
.diagram { margin: .8rem 0; padding: .85rem; border: 1px solid var(--gray-200); border-radius: var(--radius); background: var(--gray-50); }
.diagram figcaption { margin-top: .5rem; color: var(--gray-500); font-size: .8rem; line-height: 1.7; }
.diagram svg { display: block; width: 100%; height: auto; max-height: 330px; }
.flow-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .6rem; }
.flow-node { padding: .7rem; border: 1px solid #bfdbfe; border-radius: 8px; background: white; text-align: center; font-size: .88rem; color: var(--gray-700); }
.flow-node strong { display: block; margin-bottom: .25rem; color: var(--primary-dark); }
.table-scroll { margin: .8rem 0; overflow-x: auto; border: 1px solid var(--gray-200); border-radius: var(--radius); }
.table-scroll table { border-collapse: collapse; width: 100%; min-width: 540px; font-size: .88rem; }
.table-scroll caption { padding: .7rem .9rem; text-align: left; color: var(--primary-dark); }
.table-scroll th { padding: .65rem .85rem; background: var(--primary-light); color: var(--primary-dark); text-align: left; }
.table-scroll td { padding: .65rem .85rem; border-top: 1px solid var(--gray-200); vertical-align: top; }
.table-scroll tbody tr:nth-child(even) { background: var(--gray-50); }
details.answer, details.extra { margin: .7rem 0; padding: .65rem .9rem; border: 1px solid var(--gray-200); border-radius: 8px; background: var(--gray-50); }
details summary { color: var(--primary-dark); font-size: .9rem; cursor: pointer; }
details[open] summary { margin-bottom: .5rem; }
.practice-card { min-width: 0; margin: 1rem 0; padding: .85rem 1rem; border: 1px solid var(--gray-200); border-radius: var(--radius); background: white; }
.practice-card legend { padding: 0 .25rem; color: var(--gray-800); font-weight: 700; }
.practice-card label { display: flex; align-items: baseline; gap: .6rem; margin: .45rem 0; padding: .6rem .7rem; border: 1px solid var(--gray-200); border-radius: 8px; font-size: .93rem; cursor: pointer; }
.practice-card input { flex-shrink: 0; accent-color: var(--primary); }
.practice-card label:has(input:checked) { border-color: var(--primary); background: #eff6ff; }
.feedback { margin-top: .6rem; font-size: .9rem; }
.feedback:empty { display: none; }
.feedback.is-correct { color: #047857; }
.feedback.is-incorrect { color: #9a3412; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .4rem; min-height: 44px; padding: .55rem .85rem; border: 1px solid var(--primary); border-radius: 8px; background: var(--primary); color: white; text-decoration: none; font-size: .88rem; font-weight: 600; }
.button:hover { background: var(--primary-dark); color: white; }
.button.secondary { border-color: #bfdbfe; background: white; color: var(--primary-dark); }
.button.secondary:hover { background: var(--primary-light); }
.completion, .hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .7rem; margin: 1rem 0; }
.search-panel { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; margin: 1rem 0; }
.search-panel input, .search-panel select { min-width: 0; max-width: 100%; min-height: 44px; padding: .55rem .75rem; border: 1px solid var(--gray-300); border-radius: 8px; background: white; color: var(--gray-800); }
.search-panel input { flex: 1; min-width: 160px; }
.term-entry { padding: .85rem 0; border-bottom: 1px solid var(--gray-200); }
.course-path { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .7rem; margin: 1rem 0; }
.path-card { padding: .85rem; border: 1px solid var(--gray-200); border-radius: var(--radius); font-size: .88rem; }
.path-card strong { display: block; margin: .35rem 0; }
.path-state { color: var(--gray-500); font-size: .78rem; }
.path-card.current { border-color: var(--primary); }
.learning-intro, .course-progress { margin: 1rem 0; padding: .85rem 1rem; border: 1px solid rgba(71, 85, 105, .68); border-radius: var(--radius); background: rgba(30, 41, 59, .78); }
.course-home .box-label { color: #bae6fd; }
.course-home .small-note, .course-home .path-state { color: #94a3b8; }
.course-home .path-card { border-color: rgba(71, 85, 105, .68); background: rgba(30, 41, 59, .78); }
.course-home .path-card.current { border-color: #38bdf8; }
.course-home .button.secondary { border-color: #475569; background: transparent; color: #e2e8f0; }
.course-home .chapter-card.is-complete .ch-num { box-shadow: 0 0 0 2px rgba(45, 212, 191, .45); }
.course-progress progress { appearance: none; display: block; width: 100%; height: 7px; margin: .6rem 0; border: 0; border-radius: 99px; background: #334155; accent-color: #38bdf8; }
.course-progress progress::-webkit-progress-bar { background: #334155; border-radius: 99px; }
.course-progress progress::-webkit-progress-value { background: #38bdf8; border-radius: 99px; }
.course-progress progress::-moz-progress-bar { background: #38bdf8; border-radius: 99px; }
@media (max-width: 900px) { .course-path { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) {
    .flow-row, .course-path { grid-template-columns: 1fr; }
    .practice-card { padding: .75rem; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition: none !important; }
}
@media print {
    .nav-sidebar, .nav-overlay, .fab-home, .completion, .hero-actions, .search-panel { display: none !important; }
}