/* 老師課務指南（/help/）共用樣式：沿用首頁 tokens，無漸層、光暈、blur */
:root {
  --page: #f5f1eb;
  --card: #fffefb;
  --paper: #fbf6ee;
  --brand: #7a9e87;
  --brand-deep: #4a6b50;
  --brand-soft: #edf4f0;
  --brand-line: #d7e6dc;
  --ink: #2c2c2a;
  --muted: #5f5f5a;
  --line: #e8e2d8;
  --clay-deep: #9a4f2e;
  --radius-md: 18px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 8px rgba(62, 53, 43, .05);
  --sans: "Chiron GoRound TC", "Noto Sans TC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body { overflow-x: hidden; }

a { color: var(--brand-deep); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  padding: 8px 14px;
  background: var(--card);
  border-radius: var(--radius-pill);
}
.skip-link:focus { left: 16px; z-index: 10; }

.shell {
  width: calc(100% - 48px);
  max-width: 760px;
  margin: 0 auto;
}

.site-header { border-bottom: 1px solid var(--line); background: var(--page); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 1080px;
  height: 64px;
}

.site-mark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  text-decoration: none;
}
.site-mark img { display: block; }
.site-mark b { font-size: 20px; font-weight: 900; letter-spacing: .06em; }
.site-mark span { color: var(--muted); font-size: 13px; }

.nav-actions { display: flex; align-items: center; gap: 6px; }

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 12px;
  border-radius: var(--radius-pill);
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}
.nav-link.cta {
  background: var(--brand);
  color: var(--card);
}

.breadcrumb {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}
.breadcrumb li + li::before { content: "/"; margin-right: 6px; opacity: .6; }
.breadcrumb a { color: var(--muted); }

.article-head { padding: 14px 0 8px; }

.kicker {
  margin: 0;
  color: var(--clay-deep);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .2em;
}

h1 {
  margin: 12px 0 0;
  font-size: clamp(28px, 4.6vw, 40px);
  line-height: 1.35;
  font-weight: 800;
  text-wrap: balance;
}

.lede {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.85;
}

.meta { margin: 14px 0 0; color: var(--muted); font-size: 13px; }

.toc {
  margin: 28px 0 8px;
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--paper);
}
.toc p { margin: 0 0 8px; font-weight: 800; font-size: 14px; }
.toc ol { margin: 0; padding-left: 1.3em; line-height: 1.9; font-size: 15px; }

.prose { padding-bottom: 24px; font-size: 17px; line-height: 1.95; }
.prose h2 {
  margin: 48px 0 0;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-size: clamp(22px, 3vw, 27px);
  line-height: 1.45;
  font-weight: 800;
  scroll-margin-top: 16px;
}
.prose h3 { margin: 30px 0 0; font-size: 19px; line-height: 1.5; font-weight: 800; }
.prose p { margin: 14px 0 0; }
.prose ul, .prose ol { margin: 14px 0 0; padding-left: 1.4em; }
.prose li { margin: 6px 0 0; }
.prose strong { color: var(--ink); }

.table-wrap {
  margin: 18px 0 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
}
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; line-height: 1.7; }
.prose th, .prose td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.prose th { background: var(--paper); font-weight: 800; white-space: nowrap; }
.prose tr:last-child td { border-bottom: 0; }

.note {
  margin: 20px 0 0;
  padding: 16px 20px;
  border: 1px solid var(--brand-line);
  border-radius: var(--radius-md);
  background: var(--brand-soft);
  font-size: 16px;
}
.note p:first-child { margin-top: 0; }

.template {
  margin: 18px 0 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
  font-size: 15px;
  line-height: 1.9;
  white-space: pre-wrap;
  font-family: var(--sans);
}

.product-box {
  margin: 48px 0 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
  box-shadow: var(--shadow-sm);
}
.product-box h2 { margin: 0; padding: 0; border: 0; font-size: 21px; }
.product-box p { margin: 10px 0 0; color: var(--muted); font-size: 16px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  margin-top: 18px;
  padding: 0 24px;
  border-radius: var(--radius-pill);
  background: var(--brand);
  color: var(--card);
  font-size: 16px;
  font-weight: 800;
  text-decoration: none;
}
.btn-note { display: block; margin-top: 10px; color: var(--muted); font-size: 13px; }

.related { margin: 48px 0 0; padding-top: 28px; border-top: 1px solid var(--line); }
.related h2 { margin: 0; font-size: 19px; font-weight: 800; }
.related ul { margin: 12px 0 0; padding-left: 1.2em; line-height: 2; }

.guide-list { margin: 28px 0 0; padding: 0; list-style: none; display: grid; gap: 14px; }
.guide-list a {
  display: block;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
  color: var(--ink);
  text-decoration: none;
}
.guide-list b { display: block; font-size: 18px; line-height: 1.5; }
.guide-list span { display: block; margin-top: 6px; color: var(--muted); font-size: 15px; line-height: 1.75; }

.footer {
  margin-top: 64px;
  padding: 28px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}
.footer a { color: var(--muted); margin-right: 14px; }

@media (hover: hover) {
  .guide-list a:hover { border-color: var(--brand-line); }
  .nav-link:not(.cta):hover { color: var(--ink); }
}

@media (max-width: 600px) {
  .shell { width: calc(100% - 32px); }
  .site-mark span { display: none; }
  .nav-link { padding: 0 9px; font-size: 13px; }
  .prose { font-size: 16px; }
  .lede { font-size: 16.5px; }
  .btn { width: 100%; }
}