:root {
  --bg: #F6F8FA;
  --surface: #FFFFFF;
  --ink: #0F1B2A;
  --ink-2: #4A5A6B;
  --ink-3: #5A6878;
  --line: #DFE5EB;
  --brand: #0F2A44;
  --accent: #0E8C88;
  --accent-ink: #FFFFFF;
  --tag-bg: #E3F4F3;
  --tag-ink: #0B6B68;
  --muted-bg: #EEF1F4;
  --muted-ink: #4A5A6B;
  --current-bg: #0F2A44;
  --current-ink: #F1F5F9;
  --current-ink-2: #A9BCCF;
  --current-accent: #58D5D0;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0B1420;
    --surface: #121E2C;
    --ink: #E6EDF3;
    --ink-2: #A9B7C6;
    --ink-3: #8696A8;
    --line: #22324A;
    --brand: #E6EDF3;
    --accent: #58D5D0;
    --accent-ink: #0B1420;
    --tag-bg: #12393B;
    --tag-ink: #7FE3DF;
    --muted-bg: #1C2A3B;
    --muted-ink: #A9B7C6;
    --current-bg: #15304D;
    --current-ink: #F1F5F9;
    --current-ink-2: #A9BCCF;
    --current-accent: #58D5D0;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0B1420;
  --surface: #121E2C;
  --ink: #E6EDF3;
  --ink-2: #A9B7C6;
  --ink-3: #8696A8;
  --line: #22324A;
  --brand: #E6EDF3;
  --accent: #58D5D0;
  --accent-ink: #0B1420;
  --tag-bg: #12393B;
  --tag-ink: #7FE3DF;
  --muted-bg: #1C2A3B;
  --muted-ink: #A9B7C6;
  --current-bg: #15304D;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", "Segoe UI", sans-serif;
  line-height: 1.65;
}
a { color: inherit; }
[lang="en"] { display: block; color: var(--ink-3); font-size: .86em; line-height: 1.5; }
h2 [lang="en"], dt [lang="en"], .badge [lang="en"], .cta [lang="en"] { display: inline; font-size: .8em; }

.wrap { max-width: 880px; margin: 0 auto; padding: 48px 16px 32px; }

.masthead .eyebrow { margin: 0 0 8px; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--tag-ink); font-weight: 700; }
.masthead h1 { margin: 0; font-size: clamp(26px, 6vw, 38px); line-height: 1.25; color: var(--brand); }
.masthead .h1-en { margin: 4px 0 0; font-size: clamp(15px, 3.4vw, 18px); color: var(--ink-2); }
.intro { margin-top: 20px; max-width: 70ch; }
.intro p { margin: 0 0 12px; color: var(--ink-2); }
.intro p[lang="en"] { font-size: 14px; color: var(--ink-3); }

h2 { font-size: 20px; margin: 0 0 16px; }

.current {
  margin: 36px 0 44px;
  padding: 28px 24px;
  border-radius: 16px;
  background: var(--current-bg);
  color: var(--current-ink);
}
.current [lang="en"] { color: var(--current-ink-2); }
.current h2 { font-size: clamp(22px, 5vw, 28px); margin: 6px 0 18px; }
.badge {
  display: inline-block; margin: 0; padding: 2px 12px; border-radius: 999px;
  background: var(--current-accent); color: #0B1420; font-size: 13px; font-weight: 700;
}
.current .badge [lang="en"] { color: #0B1420; }
.facts { display: grid; gap: 12px; margin: 0 0 22px; }
.facts div { display: grid; grid-template-columns: 7.5em 1fr; gap: 12px; }
.facts dt { color: var(--current-ink-2); font-size: 14px; }
.facts dd { margin: 0; font-weight: 600; }
.facts dd [lang="en"] { font-weight: 400; }
.cta {
  display: inline-block; padding: 12px 22px; border-radius: 10px;
  background: var(--current-accent); color: #0B1420; font-weight: 700; text-decoration: none;
}
.cta [lang="en"] { color: #0B1420; }
.cta:hover, .cta:focus-visible { filter: brightness(1.08); }

.editions { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.editions li {
  display: grid; grid-template-columns: 6.5em 1fr auto; gap: 8px 20px; align-items: start;
  padding: 18px 0; border-bottom: 1px solid var(--line);
}
.year { font-size: 22px; font-weight: 700; line-height: 1.2; }
.year span { display: block; margin-top: 4px; font-size: 13px; font-weight: 400; color: var(--ink-3); }
.meta p { margin: 0; }
.meta .host { font-weight: 600; }
.meta p + p { color: var(--ink-2); font-size: 15px; }
.links { display: flex; flex-direction: column; gap: 6px; align-items: flex-start; }
.links a { font-size: 14px; text-decoration: none; white-space: nowrap; color: var(--ink-2); }
.links a:hover, .links a:focus-visible { color: var(--tag-ink); text-decoration: underline; }
.tag { display: inline-block; margin-right: 4px; padding: 1px 8px; border-radius: 6px; font-size: 12px; font-weight: 700; background: var(--tag-bg); color: var(--tag-ink); }
.tag-muted { background: var(--muted-bg); color: var(--muted-ink); }
.note { margin: 14px 0 0; font-size: 13px; color: var(--ink-3); }
.note [lang="en"] { font-size: 1em; }

.societies { margin-top: 48px; }
.societies ul {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px;
}
.societies a {
  display: flex; align-items: center; justify-content: center; height: 84px; padding: 14px;
  background: #FFFFFF; border: 1px solid var(--line); border-radius: 12px;
}
.societies a:hover, .societies a:focus-visible { border-color: var(--accent); }
.societies img { max-width: 100%; max-height: 52px; width: auto; height: auto; object-fit: contain; }

.foot { padding: 24px 16px 40px; text-align: center; font-size: 12px; color: var(--ink-3); }
.foot p { margin: 0; }

a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

@media (max-width: 640px) {
  .wrap { padding-top: 32px; }
  .current { padding: 22px 18px; }
  .facts div { grid-template-columns: 1fr; gap: 2px; }
  .editions li { grid-template-columns: 1fr; gap: 6px; }
  .year span { display: inline; margin: 0 0 0 8px; }
  .links { flex-direction: row; flex-wrap: wrap; gap: 6px 14px; }
  .links a { white-space: normal; }
  .societies ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}