/* 世界悬案 · 与 jikejiao.com 同一套深色视觉：深空蓝黑 + 品牌金橙 + 电光青
   不加载外部字体（国内访问稳定） */
:root {
  --bg0: #04060d;
  --bg1: #0a101e;
  --bg2: #0f172a;
  --ink: #e9eef8;
  --mut: #8f9ab2;
  --dim: #64708a;
  --gold: #f5b53f;
  --gold-hi: #ffd257;
  --cyan: #53d9ff;
  --red: #ff5468;
  --line: rgba(126, 158, 214, 0.16);
  --line-hi: rgba(126, 158, 214, 0.34);
  --font: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  background: var(--bg0);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::selection { background: var(--gold); color: #1a1204; }
a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--gold-hi); }
a.en { text-decoration: underline dotted rgba(83, 217, 255, .45); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

/* 顶栏 */
.top { position: sticky; top: 0; z-index: 20; background: rgba(4, 6, 13, .88); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; justify-content: space-between; height: 56px; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; letter-spacing: .04em; }
.brand small { display: block; font-size: 11px; font-weight: 400; color: var(--mut); letter-spacing: .02em; line-height: 1.2; }
.brand > span:last-child { line-height: 1.25; }
.brand-mark { width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid var(--gold); color: var(--gold); border-radius: 4px; font-size: 16px; }
.top-nav { display: flex; gap: 18px; font-size: 14px; }
.top-nav a { color: var(--mut); }
.top-nav a:hover { color: var(--gold-hi); }

/* 首页 */
.hero { padding: 72px 0 48px; border-bottom: 1px solid var(--line);
  background: radial-gradient(900px 360px at 15% 0%, rgba(245, 181, 63, .10), transparent 70%),
              radial-gradient(700px 300px at 90% 20%, rgba(83, 217, 255, .07), transparent 70%); }
.eyebrow { font-family: var(--mono); font-size: 12px; color: var(--gold); letter-spacing: .14em; }
.hero h1 { font-size: clamp(44px, 9vw, 84px); line-height: 1.1; margin: 14px 0 18px; letter-spacing: .06em; }
.hero-sub { color: var(--mut); font-size: 18px; max-width: 640px; }
.hero-act { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 10px 22px; border-radius: 4px; background: var(--gold); color: #1a1204; font-weight: 700; border: 1px solid var(--gold); font-size: 15px; cursor: pointer; font-family: inherit; }
.btn:hover { background: var(--gold-hi); color: #1a1204; }
.btn.ghost { background: transparent; color: var(--gold); }
.btn.ghost:hover { background: rgba(245, 181, 63, .1); color: var(--gold-hi); }
.h { font-size: 22px; margin: 56px 0 20px; display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.h small { font-size: 13px; color: var(--dim); font-weight: 400; }

.cats { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.cat { border: 1px solid var(--line); border-radius: 6px; background: var(--bg1); transition: border-color .2s; }
.cat:hover { border-color: var(--line-hi); }
.cat-main { display: grid; grid-template-columns: auto 1fr; column-gap: 16px; padding: 18px 20px; color: var(--ink); }
.cat-main:hover { color: var(--ink); }
.cat-n { grid-row: span 3; font-family: var(--mono); font-size: 30px; color: var(--gold); line-height: 1.1; min-width: 64px; }
.cat-name { font-size: 19px; font-weight: 700; }
.cat-desc { color: var(--mut); font-size: 14px; }
.cat-span { font-family: var(--mono); font-size: 12px; color: var(--dim); }
.cat-subs { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 20px 16px; }
.cat-subs a { font-size: 12px; padding: 2px 9px; border: 1px solid var(--line); border-radius: 3px; color: var(--mut); }
.cat-subs a:hover { border-color: var(--gold); color: var(--gold-hi); }

.bars { display: flex; align-items: flex-end; gap: 4px; height: 220px; padding: 0 0 4px; border-bottom: 1px solid var(--line-hi); }
.bar { flex: 1; height: 100%; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; background: none; border: 0; cursor: pointer; color: var(--mut); font-family: var(--mono); position: relative; min-width: 0; }
.bar::before { content: ""; display: block; width: 100%; height: var(--h); background: linear-gradient(180deg, var(--gold), rgba(245, 181, 63, .35)); border-radius: 2px 2px 0 0; order: 1; transition: filter .2s; }
.bar:hover::before, .bar.on::before { filter: brightness(1.3); background: var(--cyan); }
.bar-v { order: 0; font-size: 11px; margin-bottom: 3px; color: var(--mut); }
.bar-l { order: 2; position: absolute; top: 100%; margin-top: 6px; font-size: 11px; white-space: nowrap; color: var(--dim); }
#timeline { margin-bottom: 40px; }

.tools { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: 8px 0 12px; }
.tools input, .tools select { background: var(--bg1); color: var(--ink); border: 1px solid var(--line-hi); border-radius: 4px; padding: 10px 14px; font-size: 16px; font-family: inherit; }
.tools input { flex: 1; min-width: 0; width: 100%; max-width: 560px; }
.tools select { flex: 0 0 auto; }
#fcount, .qinfo { color: var(--dim); font-size: 13px; font-family: var(--mono); }
.results { list-style: none; }
.results li { border-bottom: 1px solid var(--line); padding: 12px 0; }
.results a { display: block; color: var(--ink); }
.results a:hover .r-t { color: var(--gold-hi); }
.r-y { font-family: var(--mono); color: var(--gold); font-size: 13px; margin-right: 8px; }
.r-c { font-size: 12px; color: var(--dim); border: 1px solid var(--line); padding: 0 6px; border-radius: 3px; margin-right: 8px; }
.r-t { font-weight: 700; }
.r-x { display: block; color: var(--mut); font-size: 14px; line-height: 1.65; margin-top: 2px; }
.results mark { background: rgba(245, 181, 63, .25); color: var(--gold-hi); border-radius: 2px; }
.more { margin: 14px 0; }
.note { margin-bottom: 40px; color: var(--mut); }
.note p { margin-bottom: 10px; max-width: 760px; }

/* 列表页 */
.list-page { padding-top: 26px; padding-bottom: 40px; }
.crumbs { font-size: 13px; color: var(--dim); }
.crumbs a { color: var(--mut); }
.list-page h1 { font-size: clamp(28px, 5vw, 40px); margin: 8px 0 4px; line-height: 1.3; }
.sub { color: var(--mut); }
.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin: 18px 0; }
.tabs a { padding: 5px 14px; border: 1px solid var(--line-hi); border-radius: 4px; color: var(--mut); font-size: 14px; }
.tabs a.on { background: var(--gold); border-color: var(--gold); color: #1a1204; font-weight: 700; }
.tabs a:not(.on):hover { border-color: var(--gold); color: var(--gold-hi); }
.lead { color: var(--mut); max-width: 800px; margin: 14px 0 8px; }
.lead p { margin-bottom: 10px; }
.xref { border-left: 2px solid var(--gold); padding-left: 12px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 8px; position: sticky; top: 56px; z-index: 10; background: rgba(4, 6, 13, .92); padding: 8px 0; backdrop-filter: blur(8px); }
.chips a { font-size: 13px; padding: 2px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--mut); white-space: nowrap; }
.chips a i { font-style: normal; font-family: var(--mono); font-size: 11px; color: var(--dim); margin-left: 5px; }
.chips a:hover { border-color: var(--gold); color: var(--gold-hi); }
.sec h2 { font-size: 20px; margin: 36px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--line-hi); display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.cnt { font-size: 13px; font-weight: 400; color: var(--dim); font-family: var(--mono); white-space: nowrap; }
.sec-intro { color: var(--mut); margin-bottom: 12px; max-width: 800px; }

.case { display: grid; grid-template-columns: 64px 1fr; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.case:target { background: linear-gradient(90deg, rgba(245, 181, 63, .10), transparent 80%); }
.c-year { font-family: var(--mono); color: var(--gold); font-size: 14px; padding-top: 3px; }
.c-main { min-width: 0; overflow-wrap: anywhere; }
.c-title { font-size: 17px; line-height: 1.5; margin-bottom: 4px; }
.c-title a { color: var(--ink); }
.c-title a:hover { color: var(--gold-hi); }
.c-meta { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 13px; color: var(--mut); margin-bottom: 6px; }
.c-meta b { color: var(--dim); font-weight: 400; margin-right: 6px; }
.c-body { color: #d6dded; }
.c-extra { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 4px 16px; margin-top: 8px; font-size: 14px; }
.c-extra dt { color: var(--dim); font-size: 12px; }
.c-extra dd { color: var(--mut); }
.c-links { display: flex; gap: 14px; margin-top: 6px; font-size: 12px; }
.c-links a { color: var(--dim); }
.c-links a:hover { color: var(--gold-hi); }
.perma { margin-left: auto; font-family: var(--mono); }
.pending { font-size: 11px; color: var(--red); border: 1px solid var(--red); border-radius: 3px; padding: 0 5px; margin-left: 4px; }
.case.hide, .sec.hide { display: none; }

/* 关于页 */
.prose { padding-top: 32px; padding-bottom: 48px; max-width: 820px; }
.prose h1 { font-size: 34px; margin-bottom: 8px; }
.prose h2 { font-size: 20px; margin: 32px 0 10px; color: var(--gold); }
.prose p, .prose li { color: #cfd6e6; margin-bottom: 8px; }
.prose ul { padding-left: 1.3em; }
.src { width: 100%; border-collapse: collapse; font-size: 14px; margin: 12px 0; }
.src th, .src td { border-bottom: 1px solid var(--line); padding: 7px 8px; text-align: left; vertical-align: top; }
.src th { color: var(--dim); font-weight: 400; }
.src td:last-child { font-family: var(--mono); color: var(--dim); }

.foot { border-top: 1px solid var(--line); margin-top: 40px; padding: 26px 0 40px; font-size: 13px; color: var(--dim); }
.foot p { margin-bottom: 8px; max-width: 860px; }
.foot a { color: var(--mut); text-decoration: underline dotted; }

@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .top-nav { gap: 12px; font-size: 13px; }
  .top-nav a:nth-child(2) { display: none; }
  .brand small { display: none; }
  .hero { padding: 48px 0 36px; }
  .hero-sub { font-size: 16px; }
  .case { grid-template-columns: 1fr; gap: 2px; }
  .bars { gap: 2px; height: 180px; }
  .bar-v { display: none; }
  .bar-l { display: none; }
  .bar[data-d="early"] .bar-l, .bar[data-d="1900s"] .bar-l, .bar[data-d="1950s"] .bar-l, .bar[data-d="2000s"] .bar-l { display: block; }
  .src { font-size: 12px; }
  .src td:last-child, .src th:last-child { display: none; }
}