:root {
  --paper: #f5f3ee;
  --surface: #fffefb;
  --ink: #242826;
  --muted: #6d716e;
  --line: #dedbd2;
  --accent: #b94f32;
  --accent-soft: #f4e2dc;
  --green: #2d6b58;
  --blue: #3e6488;
  --gold: #8f681d;
  --purple: #70547d;
  --max: 1120px;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  --serif: "Iowan Old Style", "Noto Serif CJK SC", "Songti SC", Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); line-height: 1.6; -webkit-font-smoothing: antialiased; }
body[data-lang="zh"] .en, body[data-lang="en"] .zh { display: none !important; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0,0,0,0) !important; white-space: nowrap !important; border: 0 !important; }

.site-header { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 64px; padding: 10px max(22px, calc((100vw - var(--max)) / 2)); border-bottom: 1px solid rgba(222,219,210,.9); background: rgba(245,243,238,.9); backdrop-filter: blur(14px) saturate(1.3); }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 10px; background: var(--ink); color: #fff; font-size: 12px; font-weight: 800; letter-spacing: .08em; box-shadow: inset -5px -5px 0 #313735; }
.brand > span:last-child { display: grid; line-height: 1.12; }
.brand b { font-size: 14px; letter-spacing: .01em; }
.brand small { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .13em; }
nav { display: flex; align-items: center; gap: 8px; }
nav a, .lang-toggle { border: 0; border-radius: 999px; padding: 7px 11px; background: transparent; color: var(--muted); font-size: 13px; font-weight: 650; cursor: pointer; }
nav a:hover, .lang-toggle:hover { background: #ebe8e0; color: var(--ink); }

main { min-height: calc(100vh - 150px); }
.shell { width: min(var(--max), calc(100% - 36px)); margin: 0 auto; padding: 34px 0 72px; }
.hero { padding: 56px 0 28px; }
.eyebrow { margin: 0 0 9px; color: var(--accent); font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .13em; }
h1, h2, h3 { font-family: var(--serif); letter-spacing: -.018em; }
h1 { max-width: 800px; margin: 0; font-size: clamp(40px, 7vw, 76px); line-height: 1.01; font-weight: 650; }
.hero-copy { max-width: 760px; margin: 18px 0 28px; color: #515653; font-family: var(--serif); font-size: clamp(18px, 2.2vw, 23px); }
.source-line { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; margin-top: 18px; color: var(--muted); font-size: 12px; }
.source-line code { padding: 3px 8px; border: 1px solid var(--line); border-radius: 6px; background: #ece9e1; color: var(--ink); }

.search-box { display: grid; grid-template-columns: 1fr auto; gap: 10px; max-width: 850px; }
.search-box input { width: 100%; min-height: 56px; border: 1px solid #cbc7bc; border-radius: 14px; padding: 0 17px; background: var(--surface); color: var(--ink); font-size: 16px; box-shadow: 0 6px 24px rgba(36,40,38,.05); }
.search-box input:focus { outline: 3px solid rgba(185,79,50,.14); border-color: var(--accent); }
.search-box button, .primary-link { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; border: 0; border-radius: 13px; padding: 0 22px; background: var(--ink); color: #fff; font-weight: 750; cursor: pointer; }
.search-box button:hover, .primary-link:hover { background: var(--accent); }
.question-chips { display: flex; flex-wrap: wrap; gap: 8px; max-width: 940px; margin-top: 13px; }
.question-chip { border: 1px solid var(--line); border-radius: 999px; padding: 6px 11px; background: rgba(255,254,251,.7); color: #5c615e; font-size: 12px; cursor: pointer; }
.question-chip:hover { border-color: #b8afa3; color: var(--ink); }

.metric-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin: 30px 0 12px; }
.metric { min-height: 145px; padding: 17px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); cursor: pointer; transition: transform .18s ease, border-color .18s ease; }
.metric:hover { transform: translateY(-2px); border-color: #b9b4aa; }
.metric-top { display: flex; justify-content: space-between; gap: 8px; color: var(--muted); font-size: 11px; font-weight: 750; text-transform: uppercase; letter-spacing: .06em; }
.metric-value { margin: 13px 0 2px; font-family: var(--serif); font-size: 39px; line-height: 1; font-variant-numeric: tabular-nums; }
.metric-bar { height: 4px; margin: 16px 0 8px; overflow: hidden; border-radius: 10px; background: #ebe8e1; }
.metric-bar span { display: block; height: 100%; min-width: 3px; border-radius: inherit; background: var(--cat, var(--accent)); }
.metric small { color: var(--muted); font-size: 11px; }
.metric[data-category="specific_vulnerability"] { --cat: var(--accent); }
.metric[data-category="ai_security"] { --cat: var(--purple); }
.metric[data-category="exploit_tool"] { --cat: var(--green); }
.metric[data-category="collection"] { --cat: var(--blue); }
.metric[data-category="other"] { --cat: var(--gold); }

.equation { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 13px; background: #ebe8e0; color: #505552; font-size: 12px; }
.equation b { color: var(--ink); font-size: 14px; font-variant-numeric: tabular-nums; }
.equation .equals { color: var(--accent); font-weight: 900; }

.section { margin-top: 48px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 15px; }
.section-heading h2 { margin: 0; font-size: 30px; line-height: 1.15; }
.section-heading p { max-width: 620px; margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.count { color: var(--muted); font-size: 12px; white-space: nowrap; }

.answer-box { margin: 24px 0; padding: 20px 22px; border: 1px solid #d7c4bc; border-left: 4px solid var(--accent); border-radius: 4px 15px 15px 4px; background: #fffaf6; }
.answer-box h2 { margin: 0 0 7px; font-size: 25px; }
.answer-box p { margin: 5px 0; color: #515653; }
.answer-number { color: var(--accent); font-family: var(--serif); font-size: 38px; line-height: 1; }
.platform-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; margin-top: 15px; }
.platform { padding: 11px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); cursor: pointer; }
.platform:hover { border-color: var(--accent); }
.platform b { display: block; font-family: var(--serif); font-size: 24px; }
.platform span { color: var(--muted); font-size: 11px; text-transform: uppercase; }

.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin: 28px 0 14px; }
.filter-tabs { display: flex; flex-wrap: wrap; gap: 7px; }
.filter-tab { border: 1px solid var(--line); border-radius: 999px; padding: 6px 11px; background: var(--surface); color: var(--muted); font-size: 12px; cursor: pointer; }
.filter-tab.active { border-color: var(--ink); background: var(--ink); color: #fff; }
.toolbar select { min-height: 35px; border: 1px solid var(--line); border-radius: 9px; padding: 0 30px 0 10px; background: var(--surface); color: var(--ink); font-size: 12px; }

.repo-list { display: grid; gap: 9px; }
.repo-card { display: grid; grid-template-columns: 48px minmax(0,1fr) auto; align-items: start; gap: 15px; padding: 17px 18px; border: 1px solid var(--line); border-radius: 15px; background: var(--surface); transition: border-color .16s ease, transform .16s ease; }
.repo-card:hover { transform: translateY(-1px); border-color: #aaa59b; }
.rank { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 11px; background: #ece9e1; color: var(--muted); font-size: 12px; font-weight: 800; font-variant-numeric: tabular-nums; }
.repo-main { min-width: 0; }
.repo-title { display: flex; align-items: baseline; flex-wrap: wrap; gap: 8px; margin: -2px 0 4px; font-family: var(--serif); font-size: 19px; font-weight: 700; }
.repo-owner { color: var(--muted); font-weight: 450; }
.repo-desc { display: -webkit-box; overflow: hidden; margin: 0; color: #5a5f5c; font-size: 13px; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.repo-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.tag { display: inline-flex; align-items: center; min-height: 24px; border-radius: 7px; padding: 2px 8px; background: #eeebe4; color: #5b605d; font-size: 10.5px; font-weight: 650; }
.tag.category { background: var(--accent-soft); color: #813820; }
.tag.ai_security { background: #eee5f1; color: #60426d; }
.tag.exploit_tool { background: #e1eee9; color: #285c4c; }
.tag.collection { background: #e1eaf2; color: #355a7a; }
.tag.other { background: #f0e8d5; color: #75591d; }
.stars { min-width: 75px; text-align: right; font-size: 12px; font-weight: 800; font-variant-numeric: tabular-nums; white-space: nowrap; }
.stars small { display: block; color: var(--muted); font-size: 9px; font-weight: 650; text-transform: uppercase; letter-spacing: .08em; }

.pagination { display: flex; justify-content: center; align-items: center; gap: 8px; margin: 25px 0 0; }
.page-btn { min-width: 38px; min-height: 38px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); color: var(--ink); cursor: pointer; }
.page-btn:hover:not(:disabled) { border-color: var(--accent); }
.page-btn:disabled { opacity: .38; cursor: default; }
.page-status { padding: 0 8px; color: var(--muted); font-size: 12px; }

.crumbs { margin-bottom: 22px; color: var(--muted); font-size: 12px; }
.crumbs a:hover { color: var(--accent); }
.entry-head { display: grid; grid-template-columns: minmax(0,1fr) auto; align-items: start; gap: 28px; padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.entry-head h1 { overflow-wrap: anywhere; font-size: clamp(34px, 6vw, 64px); }
.entry-head .hero-copy { margin-bottom: 0; font-size: 18px; }
.entry-rank { padding: 14px 17px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); text-align: center; }
.entry-rank b { display: block; font-family: var(--serif); font-size: 34px; line-height: 1; }
.entry-rank span { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.detail-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 18px; margin-top: 24px; }
.panel { padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); }
.panel h2 { margin: 0 0 12px; font-size: 23px; }
.panel p { color: #565b58; }
.classification { padding: 16px; border-radius: 13px; background: #f4ece8; }
.classification b { display: block; margin-bottom: 3px; font-family: var(--serif); font-size: 21px; }
.confidence { height: 5px; margin-top: 13px; overflow: hidden; border-radius: 8px; background: #ded6d1; }
.confidence span { display: block; height: 100%; background: var(--accent); }
.kv { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: var(--line); }
.kv div { padding: 12px; background: var(--surface); }
.kv small { display: block; color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .06em; }
.kv b { overflow-wrap: anywhere; font-size: 13px; }
.topic-cloud { display: flex; flex-wrap: wrap; gap: 6px; }
.entry-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 18px; }
.secondary-link { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; border: 1px solid var(--line); border-radius: 13px; padding: 0 18px; background: var(--surface); font-size: 13px; font-weight: 700; }
.secondary-link:hover { border-color: var(--accent); }

.method { max-width: 820px; }
.method h1 { font-size: clamp(40px, 6vw, 66px); }
.prose { font-family: var(--serif); font-size: 18px; }
.prose h2 { margin: 2em 0 .4em; font-size: 29px; }
.prose p, .prose li { color: #4f5451; }
.prose code { padding: .12em .35em; border-radius: 5px; background: #e9e6de; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .82em; }
.definition-list { display: grid; gap: 9px; margin-top: 15px; }
.definition { padding: 15px 17px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.definition b { display: block; color: var(--ink); }
.definition span { color: var(--muted); font-size: 14px; }
.notice { margin: 20px 0; padding: 13px 16px; border-radius: 11px; background: #eee9df; color: #5b5f5c; font-size: 12px; }
.empty { padding: 50px 20px; border: 1px dashed #bbb7ae; border-radius: 16px; color: var(--muted); text-align: center; }
.loading { display: flex; align-items: center; justify-content: center; gap: 12px; min-height: 60vh; color: var(--muted); }
.spinner { width: 24px; height: 24px; border: 3px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

footer { display: flex; justify-content: space-between; gap: 24px; width: min(var(--max), calc(100% - 36px)); margin: 0 auto; padding: 25px 0 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-links a:hover { color: var(--accent); }

@media (max-width: 900px) {
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .metric:last-child { grid-column: span 2; }
  .platform-grid { grid-template-columns: repeat(3, 1fr); }
  .detail-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .site-header { padding-inline: 14px; }
  nav a { display: none; }
  .shell { width: min(100% - 24px, var(--max)); padding-top: 22px; }
  .hero { padding-top: 32px; }
  .search-box { grid-template-columns: 1fr; }
  .search-box button { min-height: 50px; }
  .metric-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .metric { min-height: 126px; padding: 14px; }
  .metric-value { font-size: 32px; }
  .section-heading, .toolbar { align-items: flex-start; flex-direction: column; }
  .repo-card { grid-template-columns: 38px minmax(0,1fr); gap: 10px; padding: 14px 12px; }
  .rank { width: 34px; height: 34px; }
  .stars { grid-column: 2; min-width: 0; text-align: left; }
  .stars small { display: inline; margin-left: 4px; }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .entry-head { grid-template-columns: 1fr; }
  .entry-rank { width: max-content; }
  .kv { grid-template-columns: 1fr; }
  footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}