:root {
  --bg: #0f172a;
  --paper: #1e293b;
  --ink: #e2e8f0;
  --muted: #94a3b8;
  --line: #334155;
  --accent: #22d3ee;
  --accent-soft: #164e63;
  --科學: #67e8f9;
  --數學: #93c5fd;
  --語文: #7dd3fc;
  --社會: #c4b5fd;
  --藝術: #5eead4;
  --程式: #a5b4fc;
  --百科: #6ee7b7;
  --其他: #94a3b8;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { color-scheme: dark; }
body {
  font-family: "Iowan Old Style", "Palatino Linotype", "Songti TC", "Noto Serif TC", "PMingLiU", serif;
  background: radial-gradient(1200px 600px at 10% -10%, #1e3a4c 0%, transparent 55%), var(--bg);
  color: var(--ink);
  min-height: 100vh;
}
.wrap { max-width: 1180px; margin: 0 auto; padding: 28px 20px 80px; }
header { margin-bottom: 28px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { min-width: 0; flex: 0 1 auto; }
.partner-wrap { margin-left: auto; min-width: 280px; max-width: 420px; }
.partner-kicker { display: block; font-family: "Avenir Next", "PingFang TC", sans-serif; font-size: 11px; color: var(--muted); letter-spacing: 0.04em; margin: 0 0 6px 2px; }
.partner { display: flex; align-items: center; gap: 14px; text-decoration: none; color: var(--ink); background: #132033; border: 1px solid var(--line); border-radius: 14px; padding: 12px 16px; }
.partner-name { font-family: "Avenir Next", "PingFang TC", sans-serif; font-size: 18px; font-weight: 700; color: #7dd3fc; white-space: nowrap; }
.partner-copy { font-family: "Avenir Next", "PingFang TC", sans-serif; font-size: 13px; color: var(--muted); line-height: 1.45; }
.partner-copy strong { display: block; color: var(--ink); font-weight: 600; font-size: 14px; }
.partner:hover { border-color: var(--accent); }
.social { display: inline-block; font-family: "Avenir Next", "PingFang TC", sans-serif; font-size: 13px; color: var(--accent); text-decoration: none; border: 1px solid var(--line); background: var(--paper); border-radius: 999px; padding: 7px 12px; white-space: nowrap; margin-top: 12px; }
.kicker { letter-spacing: 0.22em; text-transform: uppercase; font-size: 12px; color: var(--accent); font-family: "Avenir Next", "PingFang TC", sans-serif; margin-bottom: 8px; }
h1 { font-size: 42px; font-weight: 600; margin: 0 0 8px; letter-spacing: 0.06em; }
.subtitle { color: var(--muted); font-size: 16px; line-height: 1.6; margin: 0; }
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 28px 0 18px; font-family: "Avenir Next", "PingFang TC", sans-serif; }
.search { flex: 1 1 240px; border: 1px solid var(--line); background: var(--paper); border-radius: 999px; padding: 10px 16px; font-size: 14px; color: var(--ink); outline: none; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; flex: 1 1 100%; }
.chip { border: 1px solid var(--line); background: var(--paper); color: var(--muted); border-radius: 999px; padding: 7px 12px; font-size: 13px; cursor: pointer; }
.chip.active { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.kind-row, .age-row { width: 100%; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.age-label { font-size: 12px; color: var(--muted); letter-spacing: 0.04em; white-space: nowrap; }
.chips.kinds, .chips.ages { width: auto; flex: 1; }
.chips.ages .chip { font-size: 12px; padding: 5px 10px; }
.stats { color: var(--muted); font-size: 13px; margin-left: auto; }
.list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 900px) {
  .list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  header { flex-wrap: wrap; align-items: flex-start; }
  .partner-wrap { flex: 1 1 100%; margin-left: 0; max-width: none; }
}
@media (max-width: 560px) { .list { grid-template-columns: 1fr; } }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 16px; padding: 16px; min-width: 0; }
.card-top { display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.badge { font-family: "Avenir Next", "PingFang TC", sans-serif; font-size: 12px; padding: 3px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }
.badge.科學 { background: #164e63; color: var(--科學); }
.badge.數學 { background: #1e3a5f; color: var(--數學); }
.badge.語文 { background: #163a4d; color: var(--語文); }
.badge.社會 { background: #2e2654; color: var(--社會); }
.badge.藝術 { background: #134e4a; color: var(--藝術); }
.badge.程式 { background: #1e2a54; color: var(--程式); }
.badge.百科 { background: #14532d; color: var(--百科); }
.badge.其他 { background: #334155; color: var(--其他); }
.badge.想想 { background: #3b2a12; color: #fbbf24; }
.badge.論文 { background: #2a1f4a; color: #c4b5fd; }
.title { font-size: 18px; margin: 0; flex: 1 1 100%; }
.date { color: var(--muted); font-size: 13px; font-family: "Avenir Next", "PingFang TC", sans-serif; }
.summary { margin: 10px 0 0; line-height: 1.65; font-size: 14.5px; }
.more { margin: 10px 0 0; font-family: "Avenir Next", "PingFang TC", sans-serif; font-size: 13px; }
.more a { color: var(--accent); text-decoration: none; }
.facts { margin-top: 12px; display: grid; gap: 6px; font-family: "Avenir Next", "PingFang TC", sans-serif; font-size: 13.5px; }
.facts div { display: grid; grid-template-columns: 48px 1fr; gap: 8px; }
.facts b { color: var(--muted); font-weight: 500; }
.tags { margin-top: 12px; display: flex; gap: 6px; flex-wrap: wrap; }
.tag { font-size: 12px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 3px 8px; font-family: "Avenir Next", "PingFang TC", sans-serif; background: transparent; cursor: pointer; }
.source { margin-top: 12px; font-size: 13px; color: var(--muted); }
.source a { color: var(--accent); text-decoration: none; }
.empty { grid-column: 1 / -1; background: var(--paper); border: 1px dashed var(--line); border-radius: 16px; padding: 36px 24px; text-align: center; }
footer { margin-top: 36px; color: var(--muted); font-size: 13px; }
footer a { color: var(--accent); text-decoration: none; }
.reader-wrap { max-width: 720px; }
.back { margin: 0 0 18px; font-family: "Avenir Next", "PingFang TC", sans-serif; font-size: 14px; }
.back a { color: var(--accent); text-decoration: none; }
.reader h1 { font-size: 32px; line-height: 1.35; margin: 10px 0 18px; letter-spacing: 0.03em; }
.article-body { font-size: 18px; line-height: 1.85; margin-top: 22px; }
.article-body p { margin: 0 0 1.15em; }