:root {
  --ink: #18211b;
  --muted: #637067;
  --paper: #f6f3ea;
  --card: #fffdf7;
  --line: #d8d5ca;
  --green: #174f3a;
  --orange: #e86732;
  --shadow: 0 18px 50px rgba(24, 33, 27, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.65;
}

a { color: inherit; }

.shell { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.brand { font-size: .98rem; font-weight: 800; text-decoration: none; letter-spacing: .02em; }
.brand span { color: var(--orange); }

.period-tabs { display: flex; align-items: center; gap: 8px; overflow-x: auto; }
.period-tabs a {
  flex: none;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255,255,255,.45);
  font-size: .82rem;
  font-weight: 700;
  text-decoration: none;
}
.period-tabs a[aria-current="page"] { color: white; border-color: var(--green); background: var(--green); }
.period-tabs .all-issues { border-color: transparent; color: var(--green); background: transparent; }

.hero { padding: 72px 0 56px; }
.kicker { margin: 0 0 12px; color: var(--orange); font-size: .82rem; font-weight: 800; letter-spacing: .1em; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(300px, .8fr); gap: 56px; align-items: end; }
.hero h1 { max-width: 720px; margin: 0; font-size: clamp(2.6rem, 6.5vw, 5.4rem); line-height: .98; letter-spacing: -.055em; }
.lede { max-width: 680px; margin: 24px 0 0; color: var(--muted); font-size: 1.05rem; }

.latest-card { padding: 28px; border: 1px solid var(--line); background: var(--card); box-shadow: var(--shadow); }
.latest-card small { display: block; color: var(--orange); font-size: .75rem; font-weight: 800; letter-spacing: .1em; }
.latest-card h2 { margin: 6px 0 4px; font-size: 1.6rem; line-height: 1.2; }
.latest-card p { margin: 0; color: var(--muted); }
.primary-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin-top: 24px;
  padding: 13px 16px;
  color: white;
  background: var(--green);
  font-weight: 800;
  text-decoration: none;
}

.section { padding: 54px 0; border-top: 1px solid var(--line); }
.section-head { display: flex; justify-content: space-between; gap: 24px; align-items: end; margin-bottom: 24px; }
.section-head h2 { margin: 0; font-size: clamp(1.7rem, 3vw, 2.4rem); letter-spacing: -.03em; }
.section-head p { max-width: 540px; margin: 0; color: var(--muted); }

.summary-list { border-top: 1px solid var(--ink); }
.summary-row {
  display: grid;
  grid-template-columns: 150px 80px minmax(0, 1fr) 120px;
  gap: 24px;
  align-items: baseline;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.summary-row strong { font-size: 1rem; }
.summary-row b { color: var(--orange); font-size: 1.5rem; }
.summary-row p { margin: 0; color: var(--muted); }
.summary-row span { color: var(--green); font-size: .82rem; font-weight: 800; text-align: right; }

.archive-groups { border-top: 1px solid var(--ink); }
.archive-year-group { border-bottom: 1px solid var(--line); }
.archive-year-group > summary,
.archive-month-group > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  list-style: none;
}
.archive-year-group > summary::-webkit-details-marker,
.archive-month-group > summary::-webkit-details-marker { display: none; }
.archive-year-group > summary { padding: 20px 0; color: var(--green); font-size: 1.3rem; font-weight: 800; }
.archive-month-group > summary { padding: 15px 0; font-size: 1rem; font-weight: 800; }
.archive-year-group > summary b,
.archive-month-group > summary b { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: .78rem; }
.archive-year-group > summary b::after,
.archive-month-group > summary b::after { content: "+"; color: var(--orange); font-size: 1.25rem; line-height: 1; }
.archive-year-group[open] > summary b::after,
.archive-month-group[open] > summary b::after { content: "−"; }
.archive-months { padding: 0 0 16px 28px; border-top: 1px solid var(--line); }
.archive-month-group { border-bottom: 1px solid var(--line); }
.archive-month-group:last-child { border-bottom: 0; }
.issue-list { border-top: 1px solid var(--line); }
.issue-link {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}
.issue-link time { color: var(--muted); font-size: .86rem; font-weight: 700; }
.issue-link h3 { margin: 0 0 2px; font-size: 1.08rem; }
.issue-link p { margin: 0; color: var(--muted); font-size: .9rem; }
.issue-link > span { color: var(--orange); font-size: 1.25rem; }
.issue-link:hover h3, .issue-link:focus-visible h3 { color: var(--orange); }

.empty-note { margin: 16px 0 0; color: var(--muted); font-size: .86rem; }

@media (max-width: 760px) {
  .shell { width: min(100% - 28px, 1120px); }
  .topbar { align-items: flex-start; flex-direction: column; }
  .period-tabs { width: 100%; }
  .hero { padding: 48px 0 40px; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .section { padding: 40px 0; }
  .section-head { align-items: flex-start; flex-direction: column; }
  .summary-row { grid-template-columns: 1fr auto; gap: 6px 16px; }
  .summary-row p { grid-column: 1 / -1; }
  .summary-row span { text-align: left; }
  .issue-link { grid-template-columns: 1fr auto; gap: 8px 16px; }
  .issue-link time { grid-column: 1 / -1; }
  .archive-months { padding-left: 14px; }
}