:root {
  --paper: #ffffff;
  --ink: #20252a;
  --muted: #5b6670;
  --rule: #c9d0d5;
  --rule-dark: #59636b;
  --accent: #6d2737;
  --accent-soft: #f5eef0;
  --link: #174a75;
  --max-page: 1180px;
  --reading-width: 760px;
  --serif: "Noto Serif TC", "Source Han Serif TC", "PMingLiU", "新細明體", Georgia, "Times New Roman", serif;
  --sans: "Noto Sans TC", "Source Han Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--serif); font-size: 17px; line-height: 1.85; line-break: strict; hyphens: none; }
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.site-header { border-bottom: 1px solid var(--rule-dark); background: var(--paper); }
.header-inner { display: flex; align-items: baseline; justify-content: space-between; gap: 2rem; max-width: var(--max-page); margin: 0 auto; padding: 1.15rem 2rem 1rem; }
.brand { color: var(--ink); font-size: 1.1rem; font-weight: 700; letter-spacing: 0.03em; text-decoration: none; white-space: nowrap; word-break: keep-all; }
.brand small { display: block; margin-top: 0.15rem; color: var(--muted); font: 0.72rem/1.4 var(--sans); font-weight: 400; letter-spacing: 0.05em; }
.site-nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 1.25rem; font: 0.8rem/1.4 var(--sans); }
.site-nav a { text-decoration: none; }
.nav-toggle { display: none; }

.hero { border-bottom: 3px double var(--rule-dark); }
.hero .container { max-width: var(--max-page); padding-top: 4.5rem; padding-bottom: 2.6rem; }
.container { width: min(var(--max-page), calc(100% - 4rem)); margin: 0 auto; }
.eyebrow { margin-bottom: 0.65rem; color: var(--accent); font: 0.75rem/1.5 var(--sans); font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
h1, h2, h3 { color: var(--ink); font-weight: 700; letter-spacing: -0.015em; word-break: keep-all; overflow-wrap: normal; }
h1 { max-width: 19ch; margin: 0; font-size: clamp(2.25rem, 5vw, 4.15rem); line-height: 1.18; }
h2 { margin: 3.2rem 0 1.2rem; padding-top: 1rem; border-top: 1px solid var(--rule); font-size: clamp(1.55rem, 3vw, 2.15rem); line-height: 1.3; }
h2:first-child { margin-top: 0; border-top: 0; }
h3 { margin: 0 0 0.6rem; font-size: 1.12rem; line-height: 1.45; }
.lede { max-width: 54ch; margin: 1.35rem 0 0; color: #384149; font-size: 1.18rem; line-height: 1.75; }
.print-button { margin-top: 1.5rem; padding: 0.5rem 0.8rem; border: 1px solid var(--rule-dark); border-radius: 0; background: var(--paper); color: var(--ink); font: 0.78rem/1.4 var(--sans); cursor: pointer; }
.print-button:hover { border-color: var(--accent); color: var(--accent); }

.content { padding: 3rem 0 5rem; user-select: text; }
.content > .container { max-width: var(--reading-width); }
.content p { margin: 0 0 1.15rem; }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; margin: 0 0 3rem; }
.card { padding: 1.2rem 0 0; border-top: 2px solid var(--rule-dark); }
.card p { margin: 0; color: #414a51; font-size: 0.98rem; }
.steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 2.5rem; margin: 0 0 2.2rem; }
.step { padding: 1.25rem 0 1.35rem; border-top: 1px solid var(--rule); }
.step:nth-child(-n + 2) { border-top: 2px solid var(--rule-dark); }
.step p { margin: 0; color: #414a51; }
.callout, .warning { margin: 1.8rem 0; padding: 1.1rem 1.25rem; border-top: 1px solid var(--accent); border-bottom: 1px solid var(--accent); background: var(--accent-soft); }
.warning { border-color: #8a6b2f; background: #fbf8ee; }
.resource-list { margin: 0 0 1.4rem; padding-left: 1.35rem; }
.resource-list li { padding: 0.25rem 0; }
.glossary { margin: 0; }
.glossary dt { margin-top: 1.35rem; color: var(--accent); font-weight: 700; }
.glossary dd { margin: 0; }
pre { overflow-x: auto; margin: 1.4rem 0 1.8rem; padding: 1rem 1.2rem; border-top: 1px solid var(--rule-dark); border-bottom: 1px solid var(--rule-dark); background: #fafafa; color: #4d2630; font: 0.88rem/1.7 var(--mono); white-space: pre-wrap; user-select: text; }
code { color: #4d2630; font: 0.88em/1.4 var(--mono); }
table { width: 100%; border-collapse: collapse; margin: 1.25rem 0 0.5rem; font-size: 0.94rem; line-height: 1.65; }
th, td { padding: 0.85rem 0.7rem; border-bottom: 1px solid var(--rule); text-align: left; vertical-align: top; overflow-wrap: break-word; }
thead th { border-top: 2px solid var(--rule-dark); border-bottom: 2px solid var(--rule-dark); color: var(--accent); font: 0.78rem/1.5 var(--sans); letter-spacing: 0.06em; }
tbody th { width: 25%; font-weight: 700; }

.site-footer { border-top: 3px double var(--rule-dark); }
.footer-inner { display: flex; justify-content: space-between; gap: 1rem; padding: 1.25rem 0 1.6rem; color: var(--muted); font: 0.75rem/1.5 var(--sans); }

@media (max-width: 760px) {
  body { font-size: 16px; }
  .header-inner { display: block; padding: 1rem 1.25rem; }
  .nav-toggle { display: inline-block; margin-top: 0.8rem; padding: 0.45rem 0.7rem; border: 1px solid var(--rule-dark); border-radius: 0; background: var(--paper); color: var(--ink); font: 0.78rem/1.4 var(--sans); cursor: pointer; }
  .nav-toggle:hover { border-color: var(--accent); color: var(--accent); }
  .has-js .site-nav { display: none; justify-content: flex-start; gap: 0.75rem 1rem; margin-top: 0.9rem; }
  .has-js .site-nav.is-open { display: flex; }
  .container { width: min(var(--max-page), calc(100% - 2.5rem)); }
  .hero .container { padding-top: 2.8rem; padding-bottom: 2rem; }
  h1 { font-size: clamp(2.1rem, 10vw, 3.1rem); }
  .grid, .steps { display: block; }
  .card, .step { margin-top: 1.8rem; }
  .step:nth-child(2) { border-top: 1px solid var(--rule); }
  .footer-inner { display: block; }
  .footer-inner span { display: block; margin-top: 0.35rem; }
  table { display: block; overflow-x: auto; white-space: normal; }
  th, td { min-width: 10rem; }
}

@media print {
  .site-header, .nav-toggle, .print-button { display: none; }
  body { font-size: 11pt; }
  .container { width: auto; max-width: none; }
  .hero .container { padding: 0 0 1.5rem; }
  .content { padding: 1.5rem 0; }
  a { color: inherit; text-decoration: none; }
  .card, .step, .callout, .warning, table, pre { break-inside: avoid; }
}