:root {
  --ink: #18212b;
  --muted: #5f6d7a;
  --line: #d8e0e7;
  --soft: #f3f6f8;
  --panel: #ffffff;
  --teal: #087f73;
  --teal-dark: #075f58;
  --magenta: #d72592;
  --red: #ba2d25;
  --gold: #a56a00;
  --blue: #2266b1;
  --radius: 6px;
  font-family: Inter, "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  color: var(--ink);
  background: #fff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: #fff; }
button, input, select { font: inherit; letter-spacing: 0; }
a { color: inherit; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto auto;
  align-items: center;
  gap: 22px;
  min-height: 68px;
  padding: 10px clamp(18px, 4vw, 64px);
  background: rgba(255,255,255,.97);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; min-width: 0; }
.brand img { width: 40px; height: 40px; border-radius: 6px; }
.brand span { display: grid; gap: 1px; min-width: 0; }
.brand strong { font-size: 18px; }
.brand small { color: var(--muted); white-space: nowrap; }
.topbar nav { display: flex; gap: 18px; }
.topbar nav a { text-decoration: none; color: var(--muted); font-size: 14px; }
.topbar nav a:hover { color: var(--teal-dark); }
.version-lock { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 13px; }
.version-lock strong { color: var(--ink); }
.status-dot { width: 9px; height: 9px; border-radius: 50%; background: #1c9a62; box-shadow: 0 0 0 3px #daf3e7; }

main { width: min(1500px, 100%); margin: 0 auto; }
.overview-band {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(520px, .8fr);
  gap: 42px;
  padding: 52px clamp(18px, 4vw, 64px) 38px;
  border-bottom: 1px solid var(--line);
}
.eyebrow { margin: 0 0 10px; color: var(--teal-dark); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.overview-copy h1 { margin: 0; font-size: clamp(34px, 4.2vw, 58px); line-height: 1.08; letter-spacing: 0; }
.overview-copy > p:last-child { max-width: 820px; margin: 18px 0 0; color: var(--muted); font-size: 17px; line-height: 1.8; }
.metric-strip { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-self: end; border: 1px solid var(--line); border-radius: var(--radius); }
.metric-strip div { min-height: 92px; padding: 17px 20px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.metric-strip div:nth-child(2n) { border-right: 0; }
.metric-strip div:nth-last-child(-n+2) { border-bottom: 0; }
.metric-strip strong { display: block; font-size: 28px; color: var(--ink); }
.metric-strip span { color: var(--muted); font-size: 13px; }

.visual-band { display: grid; grid-template-columns: minmax(0, 1.5fr) 210px minmax(260px, .7fr); gap: 24px; padding: 30px clamp(18px, 4vw, 64px); background: var(--soft); border-bottom: 1px solid var(--line); }
.visual-band figure { margin: 0; min-width: 0; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.desktop-visual img { width: 100%; aspect-ratio: 5 / 1; object-fit: contain; display: block; background: #fff; }
.mobile-visual img { width: 100%; height: 220px; object-fit: cover; object-position: top; display: block; }
.visual-band figcaption { display: flex; justify-content: space-between; gap: 12px; padding: 11px 13px; border-top: 1px solid var(--line); font-size: 12px; }
.visual-band figcaption span { color: var(--muted); text-align: right; }
.platform-list { align-self: center; }
.platform-list h2 { margin: 0 0 16px; font-size: 21px; }
.platform-list p { margin: 10px 0; color: var(--muted); line-height: 1.65; font-size: 14px; }
.platform-list b { color: var(--ink); }

.catalog-section, .workflow-section, .baseline-section, .audit-section { padding: 52px clamp(18px, 4vw, 64px); border-bottom: 1px solid var(--line); }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 28px; margin-bottom: 24px; }
.section-heading h2 { margin: 0; font-size: 30px; letter-spacing: 0; }
.section-heading > p, .result-count { margin: 0; color: var(--muted); font-size: 14px; }
.catalog-toolbar { display: grid; grid-template-columns: minmax(260px, 1.5fr) repeat(3, minmax(160px, .7fr)) auto; gap: 10px; padding: 14px; background: var(--soft); border: 1px solid var(--line); border-radius: var(--radius); }
.catalog-toolbar label { display: grid; gap: 5px; color: var(--muted); font-size: 12px; }
.catalog-toolbar input, .catalog-toolbar select, .catalog-toolbar button, .audit-toolbar input { min-height: 42px; border: 1px solid #cbd5de; border-radius: 5px; background: #fff; color: var(--ink); padding: 0 12px; }
.catalog-toolbar button { align-self: end; cursor: pointer; color: var(--teal-dark); font-weight: 700; }
.catalog-layout { display: grid; grid-template-columns: 225px minmax(0, 1fr); gap: 28px; margin-top: 24px; }
.category-nav { position: sticky; top: 86px; align-self: start; display: grid; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.category-nav button { display: flex; justify-content: space-between; gap: 8px; padding: 11px 13px; border: 0; border-bottom: 1px solid var(--line); background: #fff; text-align: left; cursor: pointer; color: var(--muted); }
.category-nav button:last-child { border-bottom: 0; }
.category-nav button.active { color: #fff; background: var(--teal-dark); }
.category-nav em { font-style: normal; opacity: .75; }
.feature-list { display: grid; gap: 26px; min-width: 0; }
.feature-group { scroll-margin-top: 92px; }
.feature-group-head { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; padding-bottom: 10px; border-bottom: 2px solid var(--ink); }
.feature-group-head h3 { margin: 0; font-size: 22px; }
.feature-group-head p { margin: 0; color: var(--muted); font-size: 13px; }
.feature-items { border-bottom: 1px solid var(--line); }
.feature-item { border-top: 1px solid var(--line); }
.feature-item:first-child { border-top: 0; }
.feature-item summary { list-style: none; display: grid; grid-template-columns: minmax(190px, .75fr) minmax(300px, 1.5fr) auto; align-items: center; gap: 18px; min-height: 74px; padding: 13px 4px; cursor: pointer; }
.feature-item summary::-webkit-details-marker { display: none; }
.feature-name { font-weight: 800; }
.feature-summary { color: var(--muted); font-size: 14px; line-height: 1.55; }
.tag-row { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 6px; }
.tag { display: inline-flex; align-items: center; min-height: 25px; padding: 2px 8px; border-radius: 999px; font-size: 11px; white-space: nowrap; background: #e7edf2; color: #44515e; }
.tag.available { background: #d9f1e8; color: #075f47; }
.tag.desktop { background: #e0ebfb; color: #1d548e; }
.tag.admin { background: #fae8d1; color: #805100; }
.tag.node { background: #f5dff0; color: #912069; }
.tag.partial { background: #f8dedb; color: #93251e; }
.feature-detail { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 24px; padding: 18px 20px 22px; background: var(--soft); border-left: 3px solid var(--teal); }
.feature-detail h4 { margin: 0 0 8px; font-size: 13px; }
.feature-detail ol, .feature-detail ul { margin: 0; padding-left: 19px; color: var(--muted); line-height: 1.7; font-size: 13px; }
.feature-detail p { margin: 0; color: var(--muted); line-height: 1.7; font-size: 13px; }

.workflow-section { background: #fbfcfd; }
.workflow-list { counter-reset: workflow; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.workflow-item { counter-increment: workflow; padding: 24px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; }
.workflow-item h3 { margin: 0 0 8px; font-size: 17px; }
.workflow-item h3::before { content: counter(workflow, decimal-leading-zero) " "; color: var(--magenta); }
.workflow-item p { margin: 0 0 13px; color: var(--muted); line-height: 1.65; }
.prompt { padding: 12px; background: #19242e; color: #f5f7f8; border-radius: 5px; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 12px; line-height: 1.65; white-space: pre-wrap; }
.workflow-item small { display: block; margin-top: 9px; color: var(--gold); line-height: 1.55; }

.baseline-section { background: #fff; }
.baseline-id { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; color: var(--teal-dark); font-size: 13px; }
.baseline-grid { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: var(--radius); }
.baseline-grid > div { padding: 22px; border-right: 1px solid var(--line); }
.baseline-grid > div:last-child { border-right: 0; }
.baseline-grid h3 { margin: 0 0 10px; font-size: 16px; }
.baseline-grid ol, .baseline-grid ul, .baseline-grid p { margin: 0; padding-left: 19px; color: var(--muted); font-size: 13px; line-height: 1.75; }
.baseline-grid p { padding-left: 0; }
.node-table { margin-top: 18px; overflow-x: auto; }
.node-table table { width: 100%; border-collapse: collapse; font-size: 13px; }
.node-table th, .node-table td { padding: 11px 12px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
.node-table th { color: var(--muted); background: var(--soft); }
.node-table code { font-size: 11px; }

.audit-section { background: var(--soft); }
.audit-tabs { display: flex; gap: 8px; border-bottom: 1px solid var(--line); }
.audit-tabs button { border: 0; border-bottom: 3px solid transparent; background: transparent; padding: 11px 16px; cursor: pointer; color: var(--muted); }
.audit-tabs button.active { color: var(--teal-dark); border-bottom-color: var(--teal); font-weight: 800; }
.audit-toolbar { display: flex; align-items: center; gap: 16px; padding: 15px 0; }
.audit-toolbar input { flex: 1; max-width: 620px; }
.audit-toolbar span { color: var(--muted); font-size: 13px; }
.audit-results { max-height: 720px; overflow: auto; border: 1px solid var(--line); background: #fff; }
.audit-row { display: grid; grid-template-columns: 130px minmax(220px, .8fr) minmax(0, 2fr); gap: 15px; padding: 13px 15px; border-bottom: 1px solid var(--line); font-size: 13px; }
.audit-row:last-child { border-bottom: 0; }
.audit-row .meta { color: var(--muted); }
.audit-row strong { display: block; margin-bottom: 4px; }
.audit-row p { margin: 0; color: var(--muted); line-height: 1.55; }
.audit-row code { word-break: break-all; color: var(--blue); }

footer { display: flex; justify-content: space-between; gap: 20px; padding: 24px clamp(18px, 4vw, 64px); color: var(--muted); font-size: 13px; }
footer p { margin: 0; }
footer a { color: var(--teal-dark); }

@media (max-width: 1080px) {
  .topbar { grid-template-columns: 1fr auto; }
  .topbar nav { display: none; }
  .overview-band { grid-template-columns: 1fr; }
  .metric-strip { width: min(650px, 100%); }
  .visual-band { grid-template-columns: minmax(0, 1fr) 190px; }
  .platform-list { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .platform-list h2 { grid-column: 1 / -1; margin-bottom: 0; }
  .catalog-toolbar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .catalog-toolbar button { min-height: 42px; }
  .catalog-layout { grid-template-columns: 1fr; }
  .category-nav { position: static; display: flex; overflow-x: auto; }
  .category-nav button { min-width: max-content; border-bottom: 0; border-right: 1px solid var(--line); }
  .feature-item summary { grid-template-columns: minmax(180px, .8fr) minmax(260px, 1.3fr); }
  .tag-row { grid-column: 1 / -1; justify-content: flex-start; }
}

@media (max-width: 760px) {
  .topbar { position: static; grid-template-columns: 1fr; gap: 9px; padding: 10px 14px; }
  .brand small { white-space: normal; }
  .version-lock { flex-wrap: wrap; padding-left: 51px; }
  .overview-band { padding: 34px 16px 28px; gap: 28px; }
  .overview-copy h1 { font-size: 36px; }
  .overview-copy > p:last-child { font-size: 15px; }
  .metric-strip div { min-height: 78px; padding: 13px; }
  .metric-strip strong { font-size: 24px; }
  .visual-band { grid-template-columns: 1fr; padding: 20px 16px; }
  .desktop-visual img { aspect-ratio: 3.5 / 1; }
  .mobile-visual { max-width: 320px; }
  .platform-list { grid-template-columns: 1fr; }
  .platform-list h2 { grid-column: auto; }
  .catalog-section, .workflow-section, .baseline-section, .audit-section { padding: 38px 16px; }
  .section-heading { align-items: start; flex-direction: column; gap: 8px; }
  .section-heading h2 { font-size: 26px; }
  .catalog-toolbar { grid-template-columns: 1fr; }
  .feature-group-head { align-items: start; flex-direction: column; gap: 5px; }
  .feature-item summary { grid-template-columns: 1fr; gap: 7px; min-height: 0; padding: 15px 2px; }
  .tag-row { grid-column: auto; }
  .feature-detail { grid-template-columns: 1fr; gap: 15px; padding: 17px 15px; }
  .workflow-list { grid-template-columns: 1fr; }
  .baseline-grid { grid-template-columns: 1fr; }
  .baseline-grid > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .baseline-grid > div:last-child { border-bottom: 0; }
  .audit-row { grid-template-columns: 1fr; gap: 5px; }
  .audit-toolbar { align-items: stretch; flex-direction: column; }
  footer { flex-direction: column; }
}

@media print {
  .topbar, .catalog-toolbar, .category-nav, .audit-toolbar, .audit-tabs { display: none; }
  .overview-band, .catalog-section, .workflow-section, .baseline-section { padding-left: 0; padding-right: 0; }
  .feature-item { break-inside: avoid; }
  .feature-item > div { display: grid !important; }
}