:root {
  --radius: 12px;
  --radius-sm: 8px;
  --font-display: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'PingFang TC', sans-serif;
  --font-ui: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'PingFang TC', 'Microsoft JhengHei', sans-serif;
  --font-mono: ui-monospace, 'SF Mono', Menlo, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  background: var(--bg); color: var(--fg); font-family: var(--font-ui);
  line-height: 1.75; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
body { min-height: 100vh; padding: 0 16px 110px; position: relative; }
a { color: var(--accent); } a:hover { color: var(--accent-bright); }
.container { max-width: 900px; margin: 0 auto; position: relative; z-index: 1; }

:root, :root[data-theme="paper"] {
  --accent: #2f6f6b;
  --accent-bright: color-mix(in srgb, #2f6f6b 78%, #000 22%);
  --accent-ink: #ffffff;
  --accent-soft: color-mix(in srgb, #2f6f6b 12%, transparent);
  --accent-line: color-mix(in srgb, #2f6f6b 42%, transparent);
  --bg: #f7f5f1;
  --bg-glow: color-mix(in srgb, #2f6f6b 8%, transparent);
  --ink: #1b1f21;
  --surface: #ffffff;
  --fg: #1b1f21;
  --fg-soft: color-mix(in srgb, #1b1f21 78%, #ffffff 22%);
  --dim: color-mix(in srgb, #1b1f21 55%, #ffffff 45%);
  --faint: color-mix(in srgb, #1b1f21 40%, #ffffff 60%);
  --line: color-mix(in srgb, #1b1f21 14%, transparent);
  --line-2: color-mix(in srgb, #1b1f21 26%, transparent);
}

:root[data-theme="slate"] {
  --accent: #3d6a8f;
  --accent-bright: color-mix(in srgb, #3d6a8f 78%, #000 22%);
  --accent-ink: #ffffff;
  --accent-soft: color-mix(in srgb, #3d6a8f 12%, transparent);
  --accent-line: color-mix(in srgb, #3d6a8f 42%, transparent);
  --bg: #f2f4f7;
  --bg-glow: color-mix(in srgb, #3d6a8f 8%, transparent);
  --ink: #171b20;
  --surface: #ffffff;
  --fg: #171b20;
  --fg-soft: color-mix(in srgb, #171b20 78%, #ffffff 22%);
  --dim: color-mix(in srgb, #171b20 55%, #ffffff 45%);
  --faint: color-mix(in srgb, #171b20 40%, #ffffff 60%);
  --line: color-mix(in srgb, #171b20 14%, transparent);
  --line-2: color-mix(in srgb, #171b20 26%, transparent);
}

:root[data-theme="sage"] {
  --accent: #4f7350;
  --accent-bright: color-mix(in srgb, #4f7350 78%, #000 22%);
  --accent-ink: #ffffff;
  --accent-soft: color-mix(in srgb, #4f7350 12%, transparent);
  --accent-line: color-mix(in srgb, #4f7350 42%, transparent);
  --bg: #f4f6f1;
  --bg-glow: color-mix(in srgb, #4f7350 8%, transparent);
  --ink: #1a1e19;
  --surface: #ffffff;
  --fg: #1a1e19;
  --fg-soft: color-mix(in srgb, #1a1e19 78%, #ffffff 22%);
  --dim: color-mix(in srgb, #1a1e19 55%, #ffffff 45%);
  --faint: color-mix(in srgb, #1a1e19 40%, #ffffff 60%);
  --line: color-mix(in srgb, #1a1e19 14%, transparent);
  --line-2: color-mix(in srgb, #1a1e19 26%, transparent);
}

.theme-switch {
  position: fixed; top: 14px; right: 16px; z-index: 150;
  display: flex; align-items: center; gap: 11px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border: 1px solid var(--line); border-radius: 99px;
  padding: 7px 13px; box-shadow: 0 6px 22px rgba(0,0,0,0.08);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.ts-label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 1.5px; color: var(--dim); text-transform: uppercase; }
.ts-dots { display: flex; gap: 8px; }
.ts-dot {
  width: 19px; height: 19px; border-radius: 50%; padding: 0; cursor: pointer;
  background: var(--sw); border: 2px solid var(--surface);
  box-shadow: 0 0 0 1px var(--line-2); transition: transform 0.16s ease;
}
.ts-dot:hover { transform: scale(1.14); }
.ts-dot.active { box-shadow: 0 0 0 2px var(--sw); transform: scale(1.05); }
@media (max-width: 520px) { .theme-switch { top: 10px; right: 10px; padding: 6px 11px; gap: 9px; } .ts-label { display: none; } }

.site-header {
  position: sticky; top: 0; z-index: 30;
  display: flex; justify-content: space-between; align-items: center;
  gap: 14px 24px; flex-wrap: wrap;
  padding: 14px 0; margin-bottom: 34px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand-block { display: flex; flex-direction: column; gap: 5px; }
.brand-mark {
  font-family: var(--font-display); font-weight: 900; font-size: 24px; line-height: 1;
  color: var(--accent); letter-spacing: 1.5px; text-decoration: none;
  transition: color 0.15s ease;
}
.brand-mark:hover { color: var(--accent-bright); }
.brand-tag { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 2px; color: var(--dim); }
.site-nav { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; font-size: 13px; }
.site-nav a { color: var(--dim); text-decoration: none; letter-spacing: 1px;
  padding: 6px 13px; border-radius: 999px; transition: color 0.15s ease, background 0.15s ease; }
.site-nav a:hover { color: var(--accent); background: var(--accent-soft); }
.site-nav a.active { color: var(--accent-ink); background: var(--accent); font-weight: 700; }
@media (max-width: 580px) { .brand-mark { font-size: 20px; } }
.site-disclaimer { font-size: 11.5px; color: var(--faint); line-height: 1.8; text-align: center;
  max-width: 660px; margin: 18px auto 0; }
.article-footer { margin-top: 64px; padding-top: 28px; border-top: 1px solid var(--line); text-align: center; }
.foot-links { display: flex; flex-wrap: wrap; gap: 10px 22px; justify-content: center; font-size: 13px; }
.foot-links a { color: var(--dim); text-decoration: none; }
.foot-links a:hover { color: var(--accent); }

.pg-h1 { font-family: var(--font-display); font-size: clamp(26px,4.6vw,38px); line-height:1.2; margin: 4px 0 6px; font-weight: 900; }
.pg-sub { color: var(--fg-soft); font-size: 15px; margin: 12px 0 22px; }
.sec-h { font-family: var(--font-display); font-size: 20px; letter-spacing: .5px; margin: 40px 0 8px; font-weight: 800; }
.std-table { width:100%; border-collapse: collapse; margin: 10px 0 22px; font-size: 14px; }
.std-table th, .std-table td { padding: 9px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.std-table thead th { background: var(--surface); color: var(--dim); font-weight: 600; font-size: 12.5px; }
.tbl-scroll { overflow-x: auto; }
/* 出處註記：判準值旁的「機構＋文件＋版本＋頁碼」四項，缺一即不得渲染該列 */
.src-note { font-family: var(--font-mono); font-size: 11.5px; color: var(--dim); line-height: 1.8; }
.pg-faq .qa { border-top: 1px solid var(--line); padding: 16px 0; }
.pg-faq h3 { font-size: 16px; margin: 0 0 8px; font-weight: 700; }
.pg-faq p { font-size: 14.5px; color: var(--fg-soft); margin: 0; }
.asof-note { font-size: 12px; color: var(--dim); border-top: 1px solid var(--line); padding-top: 10px; margin-top: 10px; }

.art-cover { width:100%; border-radius: var(--radius); margin: 8px 0 26px; display:block; }
.art-kicker { font-family: var(--font-mono); font-size: 12px; letter-spacing: 2.5px; color: var(--accent);
  text-transform: uppercase; margin-bottom: 10px; }
.art-h1 { font-family: var(--font-display); font-size: clamp(24px,4.4vw,36px); line-height: 1.28;
  margin: 0 0 14px; font-weight: 900; }
.art-meta { color: var(--dim); font-size: 13px; margin-bottom: 26px; display:flex; gap:14px; flex-wrap:wrap; }
.art-lede { font-size: 16.5px; color: var(--fg-soft); line-height: 1.9; border-left: 3px solid var(--accent);
  padding: 4px 0 4px 18px; margin: 0 0 30px; }
.prose { font-size: 16px; line-height: 1.95; }
.prose h2 { font-family: var(--font-display); font-size: 22px; margin: 44px 0 14px; line-height:1.4; font-weight: 800; }
.prose h3 { font-size: 17.5px; margin: 30px 0 10px; font-weight: 700; }
.prose p { margin: 0 0 18px; }
.prose strong { color: var(--fg); }
.prose a { color: var(--accent); }
.prose ul, .prose ol { margin: 0 0 18px 1.4em; }
.prose li { margin-bottom: 6px; }
.prose blockquote { border-left: 3px solid var(--line-2); color: var(--dim); padding-left: 16px; margin: 0 0 18px; }
.prose hr { border: none; border-top: 1px solid var(--line); margin: 34px 0; }
.prose table { width:100%; border-collapse: collapse; margin: 10px 0 22px; font-size: 14px; }
.prose th, .prose td { padding: 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.prose th { color: var(--dim); font-weight: 600; font-size: 12.5px; }
.prose .tbl-scroll, .prose-tblwrap { overflow-x: auto; }
.art-nav { display:flex; gap:12px; margin-top: 44px; }
.art-nav a { flex:1; border:1px solid var(--line); border-radius: 12px; padding: 12px 16px;
  text-decoration:none; color: var(--fg-soft); font-size: 13.5px; background: var(--surface); }
.art-nav a:hover { border-color: var(--accent-line); }
.art-nav .lbl { display:block; color: var(--dim); font-size: 11px; font-family: var(--font-mono);
  letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 4px; }