:root {
  --bg: #f6f6f3; --surface: #ffffff; --surface-2: #efeee9; --text: #1b1b19; --muted: #5d5c56; --border: #dcdbd4;
  --accent: #1f4fd1; --pass: #157a3c; --pass-bg: #e6f4eb; --fail: #b42318; --fail-bg: #fcebe9; --warn: #a15c07; --warn-bg: #fcf1df;
  --eng-fish: #0d9488; --eng-vox: #7c3aed; --eng-el1: #c2410c; --eng-el2: #1d4ed8;
  --band: rgba(21, 122, 60, .12); --radius: 10px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141413; --surface: #1d1d1b; --surface-2: #272724; --text: #ecebe6; --muted: #a3a29b; --border: #3a3935;
    --accent: #7ea2ff; --pass: #5cc489; --pass-bg: #17301f; --fail: #f2857a; --fail-bg: #3a1c19; --warn: #f0b45a; --warn-bg: #36280f;
    --eng-fish: #0f9e8f; --eng-vox: #8b5cf6; --eng-el1: #e2620e; --eng-el2: #3b82f6;
    --band: rgba(92, 196, 137, .14);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #141413; --surface: #1d1d1b; --surface-2: #272724; --text: #ecebe6; --muted: #a3a29b; --border: #3a3935;
  --accent: #7ea2ff; --pass: #5cc489; --pass-bg: #17301f; --fail: #f2857a; --fail-bg: #3a1c19; --warn: #f0b45a; --warn-bg: #36280f;
  --eng-fish: #0f9e8f; --eng-vox: #8b5cf6; --eng-el1: #e2620e; --eng-el2: #3b82f6;
  --band: rgba(92, 196, 137, .14);
  color-scheme: dark;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.65 -apple-system, "PingFang SC", "Noto Sans SC", "Segoe UI", sans-serif; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
a { color: var(--accent); }
.topnav { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.topnav .wrap { display: flex; gap: 16px; align-items: center; overflow-x: auto; white-space: nowrap; height: 48px; }
.topnav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.topnav a:hover { color: var(--text); }
.section { padding: 40px 0 8px; border-bottom: 1px solid var(--border); }
h1 { font-size: 30px; line-height: 1.3; margin: 8px 0 24px; }
h2 { font-size: 22px; margin: 0 0 16px; }
h3 { font-size: 17px; margin: 28px 0 10px; }
.eyebrow, .note, .muted { color: var(--muted); }
.note { font-size: 13.5px; }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.kpi { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; border-top: 4px solid var(--muted); }
.kpi.fail { border-top-color: var(--fail); } .kpi.warn { border-top-color: var(--warn); } .kpi.pass { border-top-color: var(--pass); }
.kpi .v { font-size: 28px; font-weight: 700; } .kpi .l { font-weight: 600; } .kpi .s { color: var(--muted); font-size: 13px; }
.callout { margin-top: 20px; background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: var(--radius); padding: 16px 20px; }
.callout h2 { font-size: 18px; margin-bottom: 6px; } .callout li { margin: 6px 0; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
table.data { border-collapse: collapse; width: 100%; font-size: 14px; }
table.data th, table.data td { padding: 8px 12px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
table.data thead th { background: var(--surface-2); white-space: nowrap; }
table.data tbody tr:last-child > * { border-bottom: 0; }
.cell-pass { color: var(--pass); background: var(--pass-bg); white-space: nowrap; }
.cell-fail { color: var(--fail); background: var(--fail-bg); white-space: nowrap; }
.score-row td, .score-row th { background: var(--surface-2); }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; vertical-align: 0; }
.legend { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13px; color: var(--muted); margin: 6px 0; }
.chart { width: 100%; max-width: 760px; height: auto; display: block; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.chart .grid { stroke: var(--border); stroke-width: 1; } .chart .grid.zero { stroke: var(--muted); }
.chart .tick, .chart .row-label { fill: var(--muted); font-size: 12px; }
.chart .axis-label { fill: var(--muted); font-size: 12.5px; }
.chart .pt-label { fill: var(--text); font-size: 12.5px; font-weight: 600; }
.chart .partial-ring { fill: none; stroke: var(--muted); stroke-dasharray: 3 3; }
.chart .pass-band { fill: var(--band); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.card h4 { margin: 0 0 6px; font-size: 15px; }
.card .fix { color: var(--muted); font-size: 13px; margin-top: 6px; }
.card.issue { border-left: 4px solid var(--fail); }
.calc { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; margin: 10px 0; }
.calc input { width: 90px; padding: 6px 8px; font: inherit; border: 1px solid var(--border); border-radius: 6px; background: var(--surface); color: var(--text); }
.compare { margin: 20px 0 32px; }
.listen-hint { background: var(--warn-bg); border-radius: 8px; padding: 8px 12px; }
.compare-meta { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; color: var(--muted); font-size: 13.5px; margin: 8px 0; }
.btn { font: inherit; font-size: 13.5px; padding: 6px 12px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.compare-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr)); gap: 12px; }
.vcard { background: var(--surface); border: 2px solid var(--border); border-radius: var(--radius); padding: 8px; }
.vcard.active { border-color: var(--accent); }
.vlabel { display: flex; align-items: center; gap: 4px; font-size: 13.5px; font-weight: 600; margin-bottom: 6px; white-space: nowrap; }
.listen { flex-shrink: 0; }
.listen { margin-left: auto; font-size: 12px; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface-2); color: var(--text); cursor: pointer; }
.vcard.active .listen { background: var(--accent); color: #fff; border-color: var(--accent); }
.vwrap { position: relative; background: #000; border-radius: 6px; overflow: hidden; }
.vwrap video { width: 100%; display: block; aspect-ratio: 2.4 / 1; background: #000; }
.cap { position: absolute; left: 4%; right: 4%; bottom: 18%; text-align: center; color: #fff; font-size: 13px; line-height: 1.35; white-space: pre-line; text-shadow: 0 0 3px #000, 0 0 3px #000; pointer-events: none; }
.vnote { font-size: 12px; color: var(--muted); margin-top: 6px; }
.missing-box { display: grid; place-items: center; min-height: 90px; color: var(--muted); background: var(--surface-2); border-radius: 6px; font-size: 13px; }
.vcard.missing { opacity: .75; }
.bars { display: grid; gap: 6px; max-width: 640px; }
.bar { display: grid; grid-template-columns: 64px 1fr 56px; gap: 8px; align-items: center; font-size: 13.5px; }
.bar .track { background: var(--surface-2); border-radius: 4px; height: 14px; overflow: hidden; }
.bar .fill { background: var(--fail); height: 100%; }
ul.plain { padding-left: 20px; } ul.plain li { margin: 4px 0; }
details { margin-top: 16px; } summary { cursor: pointer; font-weight: 600; }
.browser-controls { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 10px; }
.browser-controls select { font: inherit; padding: 5px 8px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface); color: var(--text); max-width: 100%; }
.browser-stage { max-width: 760px; }
.browser-links { display: flex; gap: 16px; margin-top: 8px; font-size: 13.5px; }
.q18-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; align-items: start; }
.footer { color: var(--muted); font-size: 12.5px; padding: 24px 0 40px; }
@media (max-width: 720px) {
  h1 { font-size: 23px; }
  .q18-grid { grid-template-columns: 1fr; }
}

/* —— 管理层视图 —— */
.hero h2 { font-size: 17px; margin: 24px 0 10px; }
.stages { display: grid; gap: 8px; }
.stage { display: grid; grid-template-columns: 150px auto 1fr; gap: 12px; align-items: center; background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--muted); border-radius: var(--radius); padding: 10px 14px; }
.stage.pass { border-left-color: var(--pass); } .stage.warn { border-left-color: var(--warn); } .stage.fail { border-left-color: var(--fail); }
.stage-name { font-weight: 700; }
.stage-line { color: var(--muted); font-size: 14px; }
.chip { display: inline-block; font-size: 12.5px; font-weight: 600; padding: 2px 10px; border-radius: 999px; white-space: nowrap; background: var(--surface-2); }
.chip.pass { background: var(--pass-bg); color: var(--pass); } .chip.warn { background: var(--warn-bg); color: var(--warn); }
.chip.fail { background: var(--fail-bg); color: var(--fail); } .chip.pending { background: var(--surface-2); color: var(--muted); }
.example-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(380px, 100%), 1fr)); gap: 12px; margin-bottom: 16px; }
.vcard.bad { border-color: var(--fail); }
.vlabel.wrap { white-space: normal; }
.model-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(480px, 100%), 1fr)); gap: 12px; margin-top: 20px; }
.model-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 18px; margin-top: 12px; }
.model-grid .model-card { margin-top: 0; }
.model-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 16px; margin-bottom: 8px; }
.model-head .chip { margin-left: auto; }
.model-card dl { display: grid; grid-template-columns: 44px 1fr; gap: 6px 12px; margin: 0; font-size: 14px; }
.model-card dt { color: var(--muted); font-weight: 600; }
.model-card dd { margin: 0; }
.model-card ul { margin: 0; padding: 0; list-style: none; }
.model-card .pros li::before { content: "✓ "; color: var(--pass); font-weight: 700; }
.model-card .cons li::before { content: "✗ "; color: var(--fail); font-weight: 700; }
.score { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; }
.score-bar { display: inline-block; width: 120px; height: 8px; border-radius: 4px; background: var(--surface-2); overflow: hidden; }
.score-bar span { display: block; height: 100%; background: var(--accent); }
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 4px; }
.tab { font: inherit; font-size: 13.5px; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer; }
.tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.risk-list li { margin: 10px 0; }
#details { margin: 24px 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 18px; }
@media (max-width: 720px) { .stage { grid-template-columns: 1fr; gap: 4px; } }
.hero .callout h2 { margin-top: 0; }