:root {
  --ink: #1e293b;
  --ink-2: #334155;
  --muted: #64748b;
  --faint: #94a3b8;
  --line: #e2e8f0;
  --line-soft: #f1f5f9;
  --paper: #ffffff;
  --soft: #f8fafc;
  --brand: #1f4e79;
  --brand-ink: #163a5b;
  --brand-soft: #eef3f8;
  --accent: #c98a14;
  --ok: #15803d;
  --bad: #b91c1c;
  --header-h: 64px;
  --radius: 6px;
  --font: "Noto Sans TC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-en: "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans TC", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.75; color: var(--ink); background: var(--paper); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-ink); text-decoration: underline; text-underline-offset: 3px; }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.4; }
[hidden] { display: none !important; }
[id] { scroll-margin-top: calc(var(--header-h) + 20px); }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: -9999px; top: 0; z-index: 100; padding: 8px 14px; background: var(--brand); color: #fff; }
.skip:focus { left: 12px; top: 12px; color: #fff; }
.wrap { max-width: 1200px; margin: 0 auto; padding-inline: 20px; }
.eyebrow { margin: 0 0 4px; font-size: 13px; color: var(--muted); letter-spacing: .06em; }
.empty { padding: 32px 0; color: var(--muted); }
.count { margin: 0 0 8px; font-size: 14px; color: var(--muted); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

.btn-ghost, .btn-line {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 38px; padding: 0 16px; border-radius: 4px; font: inherit; font-size: 14px;
  background: #fff; cursor: pointer; white-space: nowrap; text-decoration: none;
}
.btn-ghost { border: 1px solid var(--line); color: var(--ink-2); }
.btn-ghost:hover { border-color: var(--faint); color: var(--ink); text-decoration: none; }
.btn-line { border: 1px solid var(--brand); color: var(--brand); }
.btn-line:hover { background: var(--brand-soft); color: var(--brand-ink); text-decoration: none; }

.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .97); border-bottom: 1px solid var(--line); }
.header-bar { display: flex; align-items: center; gap: 20px; height: var(--header-h); }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); flex-shrink: 0; }
.brand:hover { color: var(--ink); text-decoration: none; }
.brand img { width: 36px; height: 36px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 18px; letter-spacing: .04em; }
.brand-text small { font-size: 12px; color: var(--muted); }
.main-nav { display: flex; align-items: center; gap: 16px; margin-left: auto; }
.nav-links { display: flex; align-items: center; gap: 2px; list-style: none; margin: 0; padding: 0; }
.nav-links > li > a, .nav-dd summary { display: block; padding: 8px 10px; border-radius: 4px; color: var(--ink-2); font-size: 15px; cursor: pointer; }
.nav-links > li > a:hover, .nav-dd summary:hover { background: var(--line-soft); color: var(--ink); text-decoration: none; }
.nav-links a[aria-current="page"], .nav-dd summary.is-current { color: var(--brand); font-weight: 700; }
.nav-dd { position: relative; }
.nav-dd summary { list-style: none; user-select: none; }
.nav-dd summary::-webkit-details-marker { display: none; }
.nav-dd summary::after { content: ""; display: inline-block; width: 6px; height: 6px; margin-left: 7px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: translateY(-3px) rotate(45deg); }
.nav-dd details[open] summary::after { transform: translateY(0) rotate(-135deg); }
.dd-menu { position: absolute; top: calc(100% + 6px); left: 0; min-width: 190px; margin: 0; padding: 6px; list-style: none; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 10px 28px rgba(15, 23, 42, .08); }
.dd-menu a { display: block; padding: 7px 10px; border-radius: 4px; color: var(--ink-2); font-size: 14px; }
.dd-menu a:hover { background: var(--line-soft); color: var(--ink); text-decoration: none; }
.dd-menu a[aria-current="page"] { color: var(--brand); font-weight: 700; }
.nav-search input { width: 150px; height: 38px; padding: 0 10px; border: 1px solid var(--line); border-radius: 4px; font: inherit; font-size: 14px; background: #fff; color: var(--ink); }
.nav-search input:focus { outline: none; border-color: var(--brand); }
.nav-toggle { display: none; }

@media (min-width: 1024px) and (max-width: 1179.98px) {
  .nav-platform { display: none; }
  .nav-search input { width: 120px; }
}

@media (max-width: 1023.98px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; margin-left: auto; border: 1px solid var(--line); border-radius: 4px; background: #fff; cursor: pointer; }
  .bars, .bars::before, .bars::after { display: block; width: 18px; height: 2px; background: var(--ink); }
  .bars { position: relative; }
  .bars::before, .bars::after { content: ""; position: absolute; left: 0; }
  .bars::before { top: -6px; }
  .bars::after { top: 6px; }
  .site-header.is-open .bars { background: transparent; }
  .site-header.is-open .bars::before { top: 0; transform: rotate(45deg); }
  .site-header.is-open .bars::after { top: 0; transform: rotate(-45deg); }
  .main-nav { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 14px; margin: 0; padding: 12px 20px 22px; background: #fff; border-bottom: 1px solid var(--line); max-height: calc(100vh - var(--header-h)); overflow-y: auto; }
  .site-header.is-open .main-nav { display: flex; }
  .nav-links { flex-direction: column; align-items: stretch; }
  .nav-links > li > a, .nav-dd summary { padding: 11px 4px; border-bottom: 1px solid var(--line-soft); border-radius: 0; font-size: 16px; }
  .dd-menu { position: static; min-width: 0; padding: 4px 0 8px 14px; border: 0; box-shadow: none; }
  .dd-menu a { padding: 9px 4px; font-size: 15px; }
  .nav-search input { width: 100%; height: 44px; font-size: 16px; }
  .nav-platform { min-height: 44px; }
}

.intro-band { padding-block: 30px 22px; }
.intro-band h1 { margin: 0 0 6px; font-size: clamp(24px, 2.6vw, 30px); letter-spacing: .02em; }
.intro-band p { max-width: 760px; margin: 0; color: var(--muted); }

.hero { background: var(--soft); border-block: 1px solid var(--line); }
.hero-slide { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); align-items: center; gap: 44px; padding-block: 40px 28px; }
.hero-text h2 { margin: 0 0 14px; font-size: clamp(22px, 2.8vw, 32px); line-height: 1.4; }
.hero-text h2 a { color: var(--ink); }
.hero-text h2 a:hover { color: var(--brand); }
.hero-text p { margin: 0 0 22px; color: var(--ink-2); }
.hero-media { aspect-ratio: 16 / 9; overflow: hidden; border-radius: var(--radius); background: var(--brand-soft); }
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.hero-controls { display: flex; gap: 8px; padding-bottom: 26px; }
.hero-dot { width: 32px; height: 20px; padding: 0; border: 0; background: transparent; cursor: pointer; position: relative; }
.hero-dot::before { content: ""; position: absolute; left: 0; right: 0; top: 9px; height: 3px; background: var(--line); }
.hero-dot[aria-current="true"]::before { background: var(--brand); }

@media (max-width: 767.98px) {
  .hero-slide { grid-template-columns: 1fr; gap: 18px; padding-block: 20px 14px; }
  .hero-media { order: -1; }
  .hero-controls { padding-bottom: 16px; }
}

.section { padding-block: 44px; }
.section + .section { border-top: 1px solid var(--line); }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
.section-head h2 { margin: 0; font-size: 22px; }
.section-head a { font-size: 14px; white-space: nowrap; }

.levels { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
.level-col { padding-top: 14px; border-top: 2px solid var(--ink); }
.level-num { margin: 0; font-size: 13px; font-weight: 700; color: var(--brand); letter-spacing: .08em; }
.level-col h3 { margin: 2px 0 6px; font-size: 20px; }
.level-col h3 a { color: var(--ink); }
.level-summary { margin: 0 0 12px; font-size: 14px; color: var(--muted); line-height: 1.65; }
.level-col ul { margin: 0 0 12px; padding: 0; list-style: none; }
.level-col li { padding: 9px 0; border-top: 1px solid var(--line-soft); font-size: 15px; line-height: 1.55; }
.level-col li a { color: var(--ink-2); }
.level-col li a:hover { color: var(--brand); }
.more { font-size: 14px; }

@media (max-width: 1023.98px) { .levels { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 584.98px) { .levels { grid-template-columns: 1fr; } }

.layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 56px; align-items: start; }
.layout-article { align-items: stretch; }
@media (max-width: 1023.98px) { .layout { grid-template-columns: minmax(0, 1fr); gap: 44px; } }

.post-list { display: flex; flex-direction: column; }
.post-card { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 22px; padding-block: 22px; border-top: 1px solid var(--line); }
.post-list .post-card:first-child { padding-top: 6px; border-top: 0; }
.post-media { display: block; aspect-ratio: 16 / 9; overflow: hidden; border-radius: 4px; background: var(--brand-soft); }
.post-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.post-card:hover .post-media img { transform: scale(1.03); }
.post-ph { display: flex; align-items: center; justify-content: center; height: 100%; color: var(--brand); font-size: 14px; }
.post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 0 0 6px; font-size: 13px; color: var(--muted); }
.post-meta a { color: var(--muted); }
.post-meta .sep { color: var(--faint); }
.lvl { display: inline-flex; align-items: center; gap: 6px; font-weight: 500; }
.post-meta a.lvl { color: var(--ink-2); }
.lvl::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--brand); }
.post-title { margin: 0 0 8px; font-size: 19px; line-height: 1.45; font-weight: 700; }
.post-title a { color: var(--ink); }
.post-title a:hover { color: var(--brand); }
.post-excerpt { margin: 0 0 8px; font-size: 15px; line-height: 1.7; color: var(--ink-2); }
.post-date { margin: 0; font-size: 13px; color: var(--faint); }
.post-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.post-grid .post-card { grid-template-columns: 1fr; gap: 12px; padding: 0; border: 0; }
.post-grid .post-title { font-size: 16px; }

@media (max-width: 767.98px) {
  .post-card { grid-template-columns: 112px minmax(0, 1fr); gap: 14px; padding-block: 16px; }
  .post-excerpt { display: none; }
  .post-title { font-size: 16px; margin-bottom: 4px; }
  .post-grid { grid-template-columns: 1fr; }
  .post-grid .post-card { grid-template-columns: 112px minmax(0, 1fr); gap: 14px; }
}

.post-body { min-width: 0; }
.pager-nav { margin-top: 4px; }
.faq, .sources, .related { margin-top: 8px; }

.sidebar { display: flex; flex-direction: column; gap: 34px; }
.widget { min-width: 0; }
.widget-title { margin: 0 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--ink); font-size: 15px; letter-spacing: .04em; }
.w-author { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 12px; align-items: center; color: var(--ink); }
.w-author:hover { text-decoration: none; }
.w-author img { width: 64px; height: 64px; border-radius: 50%; object-fit: cover; }
.w-author strong { display: block; font-size: 16px; }
.w-author small { display: block; font-size: 13px; color: var(--muted); line-height: 1.55; }
.w-list { margin: 0; padding: 0; list-style: none; }
.w-list li { padding: 10px 0; border-top: 1px solid var(--line-soft); }
.w-list li:first-child { padding-top: 0; border-top: 0; }
.w-list a { color: var(--ink); font-size: 14px; line-height: 1.55; }
.w-list a:hover { color: var(--brand); }
.w-list small { display: block; margin-top: 3px; font-size: 12px; color: var(--faint); }
.w-thumb { display: grid; grid-template-columns: 88px minmax(0, 1fr); gap: 10px; align-items: start; }
.w-thumb img, .w-ph { width: 88px; height: 50px; border-radius: 3px; object-fit: cover; background: var(--brand-soft); }
.w-cats a { display: flex; justify-content: space-between; gap: 10px; color: var(--ink-2); }
.w-cats span { color: var(--faint); font-size: 13px; }
.w-cta p { margin: 0 0 12px; font-size: 14px; color: var(--ink-2); }
.w-cta .btn-line { margin: 0 8px 8px 0; }
.w-toc { position: sticky; top: calc(var(--header-h) + 20px); max-height: calc(100vh - var(--header-h) - 40px); overflow-y: auto; }
@media (max-width: 1023.98px) { .w-toc { display: none; } }

.crumbs { margin: 22px 0 14px; font-size: 13px; color: var(--muted); }
.crumbs ol { display: flex; flex-wrap: wrap; gap: 4px 6px; margin: 0; padding: 0; list-style: none; }
.crumbs li { max-width: 100%; }
.crumbs li + li::before { content: "›"; margin-right: 6px; color: var(--faint); }
.crumbs a { color: var(--muted); }
.crumbs li[aria-current="page"] span { color: var(--ink-2); }

.page-head { padding: 6px 0 10px; }
.page-head h1 { margin: 0 0 10px; font-size: clamp(26px, 3vw, 32px); }
.page-head .intro { max-width: 780px; margin: 0 0 18px; color: var(--ink-2); }
.page-search { display: flex; gap: 8px; max-width: 520px; margin: 0 0 22px; }
.page-search input { flex: 1; min-width: 0; height: 42px; padding: 0 12px; border: 1px solid var(--line); border-radius: 4px; font: inherit; font-size: 16px; }
.page-search input:focus { outline: none; border-color: var(--brand); }
.page-search .btn-line { min-height: 42px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 26px; padding: 0; list-style: none; }
.chips a { display: inline-block; padding: 5px 13px; border: 1px solid var(--line); border-radius: 999px; font-size: 14px; color: var(--ink-2); }
.chips a:hover { border-color: var(--faint); text-decoration: none; }
.chips a[aria-current="true"] { border-color: var(--ink); color: var(--ink); font-weight: 700; }

.pager { display: flex; flex-wrap: wrap; gap: 6px; margin: 30px 0 0; padding: 0; list-style: none; }
.pager a, .pager span { display: inline-flex; align-items: center; justify-content: center; min-width: 40px; height: 40px; padding: 0 12px; border: 1px solid var(--line); border-radius: 4px; font-size: 14px; color: var(--ink-2); }
.pager a:hover { border-color: var(--faint); text-decoration: none; }
.pager span[aria-current="page"] { border-color: var(--ink); color: var(--ink); font-weight: 700; }
.pager .gap { border-color: transparent; }

.topics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.topic { display: block; padding: 18px 20px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--ink); }
.topic:hover { background: var(--soft); color: var(--ink); text-decoration: none; }
.topic strong { display: flex; justify-content: space-between; gap: 10px; font-size: 17px; }
.topic strong span { font-size: 13px; font-weight: 400; color: var(--faint); }
.topic-summary { display: block; margin-top: 4px; font-size: 14px; line-height: 1.6; color: var(--muted); }
@media (max-width: 1023.98px) { .topics { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 584.98px) { .topics { grid-template-columns: 1fr; } }

.teacher { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 36px; align-items: start; }
.teacher img { width: 160px; height: 160px; border-radius: 50%; object-fit: cover; }
.teacher h2 { margin: 0 0 10px; font-size: 24px; }
.teacher p { max-width: 780px; }
.facts { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 8px 20px; margin: 16px 0 22px; font-size: 15px; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; }
@media (max-width: 584.98px) {
  .teacher { grid-template-columns: 1fr; gap: 16px; }
  .teacher img { width: 112px; height: 112px; }
  .facts { grid-template-columns: 1fr; gap: 2px; }
  .facts dd { margin-bottom: 10px; }
}

.article { min-width: 0; }
.article-head { margin-bottom: 22px; }
.article-title { margin: 6px 0 16px; font-size: clamp(25px, 3.2vw, 34px); line-height: 1.42; letter-spacing: .01em; }
.byline { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 16px; font-size: 14px; color: var(--muted); }
.byline .who { display: inline-flex; align-items: center; gap: 8px; color: var(--ink-2); font-weight: 500; }
.byline img { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.article-cover { margin: 0 0 26px; aspect-ratio: 16 / 9; overflow: hidden; border-radius: var(--radius); background: var(--brand-soft); }
.article-cover img { width: 100%; height: 100%; object-fit: cover; }

.summary { margin: 0 0 26px; padding: 20px 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--soft); }
.summary-label { display: flex; align-items: center; gap: 8px; margin: 0 0 8px; font-size: 13px; font-weight: 700; color: var(--brand); letter-spacing: .08em; }
.summary-label::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--brand); }
.summary-lead { margin: 0 0 10px; font-size: 16px; line-height: 1.85; }
.summary ul { margin: 0; padding-left: 1.2em; }
.summary li { margin: 4px 0; line-height: 1.7; }

.toc { margin: 0 0 30px; border: 1px solid var(--line); border-radius: var(--radius); }
.toc summary { display: flex; justify-content: space-between; align-items: center; padding: 12px 18px; font-weight: 700; cursor: pointer; list-style: none; }
.toc summary::-webkit-details-marker { display: none; }
.toc summary::after { content: "收合"; font-size: 13px; font-weight: 400; color: var(--muted); }
.toc:not([open]) summary::after { content: "展開"; }
.toc-list { margin: 0; padding: 2px 18px 14px; list-style: none; }
.w-toc .toc-list { padding: 0; }
.toc-list a { display: block; padding: 5px 0; font-size: 15px; line-height: 1.5; color: var(--ink-2); }
.toc-list a:hover { color: var(--brand); }
.toc-l1 a { font-weight: 700; color: var(--ink); }
.toc-l3 a { padding-left: 20px; font-size: 14px; color: var(--muted); }
.toc-l4 a { padding-left: 40px; font-size: 13px; color: var(--faint); }
.w-toc .toc-list a { font-size: 14px; }
.w-toc .toc-l3 a { font-size: 13px; }
.toc-list a.is-active { color: var(--brand); font-weight: 700; }

.prose { font-size: 17px; line-height: 1.9; color: var(--ink); overflow-wrap: anywhere; }
.prose > *:first-child { margin-top: 0; }
.prose p { margin: 0 0 1.1em; }
.prose h2 { margin: 2.2em 0 .8em; padding-top: 1em; border-top: 1px solid var(--line); font-size: 24px; line-height: 1.45; }
.prose > h2:first-child { padding-top: 0; border-top: 0; }
.prose h3 { margin: 1.8em 0 .6em; font-size: 20px; line-height: 1.5; }
.prose h4 { margin: 1.5em 0 .5em; font-size: 17px; }
.prose ul, .prose ol { margin: 0 0 1.2em; padding-left: 1.4em; }
.prose li { margin: .35em 0; }
.prose li > p { margin: 0 0 .4em; }
.prose strong { font-weight: 700; }
.prose a { text-decoration: underline; text-decoration-color: rgba(31, 78, 121, .35); text-underline-offset: 3px; }
.prose a:hover { text-decoration-color: currentColor; }
.prose blockquote { margin: 1.4em 0; padding: 2px 0 2px 18px; border-left: 2px solid var(--line); color: var(--ink-2); }
.prose img { margin: 1.2em auto; border-radius: 4px; }
.prose figure { margin: 1.4em 0; }
.prose figcaption { margin-top: 6px; font-size: 14px; color: var(--muted); text-align: center; }
.prose hr { margin: 2em 0; border: 0; border-top: 1px solid var(--line); }
.prose code { padding: 1px 5px; border-radius: 3px; background: var(--line-soft); font-size: .9em; }
.prose [lang="en"] { font-family: var(--font-en); }

.prose .table-wrap { margin: 1.4em 0; overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); -webkit-overflow-scrolling: touch; }
.prose table { width: 100%; min-width: 540px; border-collapse: collapse; font-size: 15px; line-height: 1.65; }
.prose caption { padding: 10px 12px; font-size: 14px; color: var(--muted); text-align: left; }
.prose th, .prose td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.prose thead th { background: var(--soft); font-weight: 700; white-space: nowrap; }
.prose tbody th { font-weight: 700; background: #fff; }
.prose tbody tr:last-child > * { border-bottom: 0; }

.prose .tip, .prose .note { margin: 1.6em 0; padding: 16px 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--soft); }
.prose .tip > :last-child, .prose .note > :last-child { margin-bottom: 0; }
.prose .tip-title, .prose .note-title { display: flex; align-items: center; gap: 8px; margin: 0 0 6px; font-size: 14px; font-weight: 700; letter-spacing: .04em; }
.prose .tip-title { color: var(--brand); }
.prose .tip-title::before, .prose .note-title::before { content: ""; width: 8px; height: 8px; border-radius: 50%; }
.prose .tip-title::before { background: var(--brand); }
.prose .note-title { color: #92400e; }
.prose .note-title::before { background: var(--accent); }

.prose .example { margin: 1.2em 0; padding: 12px 18px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.prose .example p { margin: 0 0 4px; }
.prose .example p:last-child { margin-bottom: 0; }
.prose .ex-en { font-family: var(--font-en); font-size: 17px; color: var(--ink); }
.prose .ex-zh { font-size: 15px; line-height: 1.7; color: var(--muted); }
.prose .ex-wrong { font-family: var(--font-en); font-size: 17px; color: var(--bad); text-decoration: line-through; text-decoration-color: rgba(185, 28, 28, .55); }
.prose .ex-wrong::before, .prose .ex-wrong + .ex-en::before { display: inline-block; margin-right: 8px; padding: 0 6px; border: 1px solid currentColor; border-radius: 3px; font-family: var(--font); font-size: 12px; line-height: 1.6; vertical-align: 2px; }
.prose .ex-wrong::before { content: "錯誤"; }
.prose .ex-wrong + .ex-en::before { content: "正確"; color: var(--ok); }

.prose ol.steps { padding: 0; list-style: none; counter-reset: step; }
.prose ol.steps > li { position: relative; margin: 0; padding: 0 0 14px 44px; counter-increment: step; }
.prose ol.steps > li::before { content: counter(step, decimal-leading-zero); position: absolute; left: 0; top: 1px; font-size: 15px; font-weight: 700; color: var(--brand); letter-spacing: .04em; }

.prose .card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; margin: 1.4em 0; }
.prose .card { padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.prose .card p { margin: 0; font-size: 15px; line-height: 1.75; }
.prose .card p.card-title { margin: 0 0 6px; font-size: 16px; font-weight: 700; color: var(--ink); }

.section-title { margin: 44px 0 16px; padding-top: 22px; border-top: 1px solid var(--line); font-size: 24px; }
.faq-item { padding: 14px 0; border-bottom: 1px solid var(--line-soft); }
.faq-item:last-child { border-bottom: 0; }
.faq-item h3 { margin: 0 0 6px; font-size: 18px; line-height: 1.5; }
.faq-item p { margin: 0; color: var(--ink-2); line-height: 1.85; }
.sources ol { margin: 0; padding-left: 1.3em; font-size: 15px; }
.sources li { margin: 6px 0; overflow-wrap: anywhere; }
.sources-note { margin: 12px 0 0; font-size: 13px; color: var(--muted); }

.share { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 36px 0 0; }
.share-label { margin-right: 4px; font-size: 14px; color: var(--muted); }

.author-box { display: grid; grid-template-columns: 88px minmax(0, 1fr); gap: 20px; margin: 30px 0 0; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); }
.author-box img { width: 88px; height: 88px; border-radius: 50%; object-fit: cover; }
.author-box h2 { margin: 0 0 6px; font-size: 19px; }
.author-box h2 a { color: var(--ink); }
.author-box p { margin: 0 0 6px; font-size: 15px; line-height: 1.8; color: var(--ink-2); }
.author-box .reviewed { font-size: 13px; color: var(--muted); }
@media (max-width: 584.98px) { .author-box { grid-template-columns: 1fr; } .author-box img { width: 72px; height: 72px; } }

.adjacent { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 30px 0 0; }
.adjacent a { display: block; padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius); font-size: 15px; line-height: 1.55; color: var(--ink); }
.adjacent a:hover { border-color: var(--faint); text-decoration: none; }
.adjacent small { display: block; margin-bottom: 4px; font-size: 12px; color: var(--faint); }
.adjacent .older { text-align: left; }
.adjacent .newer { text-align: right; }
@media (max-width: 584.98px) { .adjacent { grid-template-columns: 1fr; } .adjacent .newer { text-align: left; } }

.author-hero { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 32px; align-items: center; padding: 8px 0 12px; }
.author-hero img { width: 160px; height: 160px; border-radius: 50%; object-fit: cover; }
.author-hero h1 { margin: 0 0 10px; font-size: clamp(26px, 3vw, 32px); }
.author-hero p { max-width: 760px; margin: 0; color: var(--ink-2); }
.author-section .section-title:first-child { margin-top: 10px; }
@media (max-width: 584.98px) { .author-hero { grid-template-columns: 1fr; gap: 16px; } .author-hero img { width: 112px; height: 112px; } }

.site-footer { margin-top: 64px; background: var(--soft); border-top: 1px solid var(--line); font-size: 14px; color: var(--ink-2); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; padding-block: 40px; }
.footer-name { margin: 0 0 8px; font-size: 16px; font-weight: 700; color: var(--ink); }
.footer-about p { max-width: 420px; }
.site-footer h2 { margin: 0 0 10px; font-size: 14px; }
.site-footer ul { margin: 0; padding: 0; list-style: none; }
.site-footer li { margin: 7px 0; }
.site-footer a { color: var(--ink-2); }
.footer-bottom { padding-block: 16px; border-top: 1px solid var(--line); font-size: 13px; color: var(--faint); }
@media (max-width: 767.98px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-about { grid-column: 1 / -1; } }

.preview-bar { padding-block: 10px; background: #fffbeb; border-bottom: 1px solid #fde68a; font-size: 14px; color: #92400e; }
.preview-bar a { color: #92400e; text-decoration: underline; }

.error-page { padding-block: 64px; max-width: 640px; }
.error-code { margin: 0; font-size: 14px; font-weight: 700; color: var(--brand); letter-spacing: .1em; }
.error-page h1 { margin: 4px 0 14px; font-size: 28px; }