:root {
  color-scheme: dark;
  --ink: #0b1418;
  --paper: #f8f3e9;
  --muted: #adb9b4;
  --amber: #f3cf99;
  --line: rgba(246, 238, 219, .16);
  --font-sans: "Noto Sans CJK TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --font-serif: "Noto Serif CJK TC", "Songti TC", "Songti SC", "PMingLiU", serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: var(--ink); color: var(--paper); font: 16px/1.9 var(--font-sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .25em; }
a:hover { color: var(--amber); }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--amber); outline-offset: 5px; }
::selection { color: var(--ink); background: var(--amber); }
.skip-link { position: fixed; top: 10px; left: 16px; z-index: 10; transform: translateY(-160%); padding: 8px 18px; background: var(--amber); color: var(--ink); }
.skip-link:focus { transform: none; }
.container { width: min(1060px, calc(100% - 64px)); margin-inline: auto; }
.site-header { border-bottom: 1px solid var(--line); background: rgba(8, 17, 22, .55); }
.header-inner { min-height: 88px; display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font: 600 27px/1.3 var(--font-serif); letter-spacing: .13em; white-space: nowrap; }
.brand svg { width: 27px; height: 27px; stroke: var(--amber); stroke-width: 1.2; stroke-linecap: round; stroke-linejoin: round; fill: none; }
.brand .window { fill: var(--amber); stroke: none; }
.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav a { display: inline-flex; min-height: 44px; align-items: center; font-size: 13px; text-decoration: none; color: #ccd4ce; }
.site-nav a[aria-current="page"] { color: var(--amber); text-decoration: underline; }
.intro { position: relative; padding-block: 72px 54px; background: radial-gradient(ellipse at 78% 0%, #23362e 0%, transparent 65%); }
.eyebrow { margin: 0 0 20px; color: var(--amber); font-size: 12px; letter-spacing: .15em; }
.eyebrow::before { content: ""; display: inline-block; width: 5px; height: 5px; margin: 0 10px 2px 0; background: var(--amber); border-radius: 50%; box-shadow: 0 0 12px #efbe7680; }
h1 { font: 500 clamp(34px, 5vw, 52px)/1.5 var(--font-serif); margin: 0 0 21px; letter-spacing: .025em; text-wrap: balance; }
.intro-copy { color: #c3cdc6; max-width: 640px; margin: 0; }
.updated { margin: 20px 0 0; color: var(--muted); font-size: 12px; }
.content { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 64px; padding-block: 32px 80px; }
.contents { align-self: start; border-top: 1px solid var(--line); padding-top: 18px; }
.contents p { margin: 0 0 8px; font-size: 12px; color: var(--amber); }
.contents a { display: block; padding-block: 9px; font-size: 13px; text-decoration: none; color: var(--muted); }
.contents a:hover { color: var(--amber); }
.article-section { padding-block: 28px; border-top: 1px solid var(--line); }
.article-section h2 { margin: 0 0 15px; font: 500 24px/1.6 var(--font-serif); color: var(--paper); }
.article-section p, .article-section ul { margin: 0 0 16px; color: #bfcbc5; }
.article-section p:last-child, .article-section ul:last-child { margin-bottom: 0; }
.article-section ul { padding-left: 1.3em; }
.article-section li + li { margin-top: 7px; }
.article-section strong { font-weight: 600; color: var(--paper); }
.notice { padding: 22px 25px; margin-bottom: 32px; background: #e9c48708; border: 1px solid #e9c48735; border-radius: 10px; }
.notice p { margin: 0; color: #d9d3c3; font-size: 14px; }
.notice p + p { margin-top: 10px; }
.faq-item { padding-block: 22px; border-bottom: 1px solid var(--line); }
.faq-item:first-child { border-top: 1px solid var(--line); }
.faq-item summary { position: relative; cursor: pointer; padding-right: 34px; list-style: none; font-size: 17px; color: var(--paper); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 1px; top: -1px; font-size: 23px; line-height: 1.5; color: var(--amber); }
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding-top: 13px; color: #bfcbc5; font-size: 15px; }
.faq-answer p { margin: 0 0 12px; }
.faq-answer p:last-child { margin-bottom: 0; }
.back-link { display: inline-flex; align-items: center; min-height: 48px; margin-top: 28px; color: var(--amber); font-size: 14px; }
.site-footer { padding-block: 28px; border-top: 1px solid var(--line); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 14px 28px; }
.footer-note { margin: 0; color: var(--muted); font-size: 12px; }
.footer-links { display: flex; gap: 22px; }
.footer-links a { display: inline-flex; align-items: center; min-height: 44px; font-size: 12px; text-decoration: none; }
@media (max-width: 720px) {
  .container { width: calc(100% - 40px); }
  .header-inner { min-height: 82px; gap: 18px; }
  .brand { font-size: 22px; gap: 8px; letter-spacing: .08em; }
  .brand svg { width: 23px; height: 23px; }
  .site-nav { gap: 18px; }
  .site-nav a { font-size: 12px; }
  .intro { padding-block: 48px 36px; }
  .intro-copy { font-size: 15px; }
  .content { grid-template-columns: 1fr; gap: 30px; padding-block: 20px 55px; }
  .contents { display: flex; flex-wrap: wrap; gap: 0 20px; padding-top: 12px; }
  .contents p { width: 100%; margin-bottom: 4px; }
  .contents a { padding-block: 6px; }
  .article-section h2 { font-size: 23px; }
  .article-section { padding-block: 25px; }
  .notice { padding: 19px 20px; }
}
@media (max-width: 390px) {
  .header-inner { flex-wrap: wrap; justify-content: center; gap: 5px; padding-top: 20px; padding-bottom: 9px; }
  .site-nav { justify-content: center; width: 100%; gap: 28px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }