/* ==========================================================================
   European Automotive Intelligence — design system
   Minimal, analytical, executive-ready. White ground, ink hierarchy,
   one low-saturation accent (deep green). No gradients, no decorative motion.
   ========================================================================== */

:root {
  --ink: #101214;
  --ink-2: #33383c;
  --ink-3: #565d61;
  --muted: #767d81;
  --faint: #9aa0a4;
  --line: #e6e7e8;
  --line-2: #d7d9da;
  --surface: #fafaf9;
  --surface-2: #f4f5f3;

  --accent: #14543f;
  --accent-2: #1c6a50;
  --accent-soft: #f0f4f1;
  --accent-line: rgba(20, 84, 63, 0.22);
  --accent-ink: #0f3d2e;

  --pos: #14543f;
  --neu: #c9d0cb;
  --neg: #8d6a58;
  --warn: #8a6a3a;

  --radius: 3px;
  --radius-lg: 5px;

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-zh: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --max: 1180px;
  --max-read: 1024px;
  --header-h: 66px;
}

* { box-sizing: border-box; }

figure { margin: 0; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: var(--font);
  font-size: 16.5px;
  line-height: 1.7;
  font-feature-settings: "kern" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

html[lang="zh"] body { font-family: var(--font-zh); font-size: 16px; letter-spacing: 0.005em; }

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); text-decoration: underline; text-underline-offset: 2px; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

::selection { background: var(--accent-soft); color: var(--accent-ink); }

/* ---------- utilities ---------- */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 40px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.eyebrow {
  font-size: 11.5px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent); font-weight: 600;
}
html[lang="zh"] .eyebrow { letter-spacing: 0.1em; }
.num { font-variant-numeric: tabular-nums; }

/* ---------- header ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0;
  background: var(--accent); z-index: 60; transition: width 0.12s linear;
}
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .bar {
  max-width: var(--max); margin: 0 auto; padding: 0 40px;
  height: var(--header-h); display: flex; align-items: center; gap: 22px;
}
.brand { display: flex; align-items: center; gap: 11px; min-width: 0; }
.brand-mark { width: 26px; height: 26px; flex: none; }
.brand-text { min-width: 0; }
.brand-name {
  font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}
.brand-report {
  font-size: 12.5px; color: var(--muted); white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis; margin-top: 1px;
}
.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav a {
  font-size: 13.5px; color: var(--ink-3); padding: 7px 11px; border-radius: var(--radius);
  white-space: nowrap;
}
.nav a:hover { background: var(--surface-2); text-decoration: none; color: var(--ink); }
.nav a.active { color: var(--accent-ink); font-weight: 600; }
.lang-toggle {
  display: inline-flex; border: 1px solid var(--line-2); border-radius: var(--radius);
  overflow: hidden; margin-left: 10px; background: #fff;
}
.lang-toggle button {
  font-size: 12px; letter-spacing: 0.04em; padding: 5px 9px; color: var(--muted);
  line-height: 1.5;
}
.lang-toggle button[aria-pressed="true"] { background: var(--accent); color: #fff; }

/* ---------- hero ---------- */
.hero { padding: 74px 0 0; }
.hero-grid {
  display: grid; grid-template-columns: 1.06fr 0.94fr; gap: 64px; align-items: start;
}
.hero-copy h1 {
  font-size: clamp(38px, 4.6vw, 58px); line-height: 1.04; letter-spacing: -0.028em;
  font-weight: 600; margin: 18px 0 0;
}
html[lang="zh"] .hero-copy h1 { letter-spacing: -0.01em; line-height: 1.15; }
.hero-sub {
  font-size: 18px; line-height: 1.6; color: var(--ink-3);
  margin: 20px 0 0; max-width: 40em;
}
.hero-value {
  margin: 30px 0 0; padding: 2px 0 2px 20px; border-left: 2px solid var(--accent);
  font-size: 16.5px; line-height: 1.65; color: var(--ink-2); max-width: 38em;
}
.hero-chips {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0;
  margin: 38px 0 0; border-top: 1px solid var(--line);
}
.chip { padding: 14px 18px 14px 0; border-bottom: 1px solid var(--line); }
.chip:nth-child(odd) { padding-right: 22px; }
.chip-label {
  font-size: 10.5px; letter-spacing: 0.11em; text-transform: uppercase;
  color: var(--muted); font-weight: 600;
}
.chip-value { font-size: 13.5px; color: var(--ink); margin-top: 4px; line-height: 1.5; }
.hero-media { position: relative; }
.hero-media img {
  width: 100%; aspect-ratio: 3 / 2; object-fit: cover;
  border-radius: var(--radius-lg); background: var(--surface-2);
}
.hero-media figcaption {
  font-size: 11.5px; color: var(--faint); line-height: 1.55; margin-top: 10px;
}
.page-intro { padding: 62px 0 0; }
.page-intro h1 {
  font-size: clamp(34px, 3.6vw, 44px); line-height: 1.1; letter-spacing: -0.022em;
  font-weight: 600; margin: 12px 0 0;
}
.page-intro p { color: var(--ink-3); max-width: 46em; margin: 14px 0 0; }
.research-main .page-intro { padding-top: 50px; }
.research-main .page-intro h1 { font-size: clamp(26px, 2.5vw, 33px); line-height: 1.2; }

/* ---------- section shells ---------- */
.band { padding: 74px 0 0; }
.band + .band { padding-top: 86px; }
.band-head { display: flex; align-items: baseline; justify-content: space-between; gap: 30px; }
.band-head h2 {
  font-size: 26px; letter-spacing: -0.015em; font-weight: 600; margin: 0; line-height: 1.2;
}
.band-lede { color: var(--ink-3); font-size: 15.5px; max-width: 52em; margin: 14px 0 0; }
.hairline { height: 1px; background: var(--line); margin: 28px 0 0; }

/* ---------- KPI dashboard ---------- */
.kpi-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px;
  background: var(--line); border: 1px solid var(--line); margin-top: 34px;
}
.kpi {
  background: #fff; padding: 26px 24px 20px; min-height: 194px;
  display: flex; flex-direction: column;
}
.kpi-value { font-size: 38px; line-height: 1; letter-spacing: -0.03em; font-weight: 600; color: var(--ink); }
html[lang="zh"] .kpi-value { letter-spacing: 0; }
.kpi-unit { font-size: 12px; color: var(--accent); margin-top: 7px; letter-spacing: 0.02em; }
.kpi-title { font-size: 14.5px; font-weight: 600; margin: 16px 0 0; line-height: 1.45; }
.kpi-note { font-size: 13px; color: var(--ink-3); margin: 8px 0 0; line-height: 1.6; flex: 1; }
.kpi-basis {
  font-size: 10.5px; color: var(--faint); letter-spacing: 0.02em; margin-top: 14px;
  padding-top: 10px; border-top: 1px solid var(--line);
}
.kpi-basis .dot {
  display: inline-block; width: 4px; height: 4px; border-radius: 50%;
  background: var(--faint); margin: 0 6px; vertical-align: middle;
}

/* ---------- findings ---------- */
.findings { margin-top: 40px; border-top: 1px solid var(--line); }
.finding {
  display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 26px;
  padding: 34px 0 32px; border-bottom: 1px solid var(--line);
}
.finding-n {
  font-size: 12px; letter-spacing: 0.1em; color: var(--accent); font-weight: 600;
  font-variant-numeric: tabular-nums; padding-top: 5px;
}
.finding h3 { font-size: 20px; line-height: 1.35; letter-spacing: -0.012em; margin: 0; font-weight: 600; }
html[lang="zh"] .finding h3 { font-size: 18.5px; }
.finding-insight { color: var(--ink-2); font-size: 15.5px; margin: 10px 0 0; max-width: 62em; }
.finding-cols { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: 34px; margin-top: 20px; }
.finding-label {
  font-size: 10.5px; letter-spacing: 0.11em; text-transform: uppercase;
  color: var(--muted); font-weight: 600; margin-bottom: 9px;
}
.evidence { margin: 0; padding: 0; list-style: none; }
.evidence li {
  position: relative; padding-left: 18px; font-size: 13.5px; line-height: 1.62;
  color: var(--ink-3); margin-bottom: 9px;
}
.evidence li::before {
  content: ""; position: absolute; left: 0; top: 8px; width: 8px; height: 1px;
  background: var(--line-2);
}
.implication {
  background: var(--accent-soft); border-left: 2px solid var(--accent);
  padding: 16px 18px; font-size: 13.8px; line-height: 1.65; color: var(--accent-ink);
}
.finding-refs { font-size: 11px; color: var(--faint); margin-top: 8px; letter-spacing: 0.02em; }

/* ---------- opportunity / risk ---------- */
.duo { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr); gap: 52px; margin-top: 36px; }
.duo h3 {
  font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase; font-weight: 600;
  color: var(--ink-3); margin: 0 0 18px; padding-bottom: 12px; border-bottom: 1px solid var(--line);
}
.opp { padding: 18px 0; border-bottom: 1px solid var(--line); }
.opp:last-child { border-bottom: 0; }
.opp-tag {
  font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent);
  font-weight: 600;
}
.opp h4 { font-size: 16px; margin: 7px 0 0; font-weight: 600; letter-spacing: -0.01em; }
.opp p { font-size: 13.6px; color: var(--ink-3); margin: 7px 0 0; line-height: 1.62; }
.risk { padding: 16px 0; border-bottom: 1px solid var(--line); }
.risk:last-child { border-bottom: 0; }
.risk-top { display: flex; align-items: baseline; gap: 10px; }
.risk-level {
  font-size: 10px; letter-spacing: 0.09em; text-transform: uppercase; color: var(--ink-3);
  border: 1px solid var(--line-2); padding: 2px 6px; border-radius: 2px; white-space: nowrap;
}
.risk h4 { font-size: 15px; margin: 0; font-weight: 600; }
.risk p { font-size: 13.4px; color: var(--ink-3); margin: 8px 0 0; line-height: 1.6; }

/* ---------- tables ---------- */
.table-block { margin-top: 30px; }
.table-caption {
  display: flex; align-items: baseline; justify-content: space-between; gap: 20px;
  font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3);
  font-weight: 600; margin-bottom: 10px;
}
.table-caption .src { font-size: 10.5px; letter-spacing: 0.04em; text-transform: none; color: var(--faint); font-weight: 400; }
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table.data { width: 100%; border-collapse: collapse; font-size: 13.2px; min-width: 520px; }
table.data th {
  text-align: left; font-size: 10.8px; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600; padding: 12px 14px; background: var(--surface);
  border-bottom: 1px solid var(--line); white-space: nowrap; vertical-align: bottom;
}
table.data th.r, table.data td.r { text-align: right; font-variant-numeric: tabular-nums; }
table.data td {
  padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top;
  color: var(--ink-2); line-height: 1.5;
}
table.data tr:last-child td { border-bottom: 0; }
table.data tbody tr:hover td { background: #fcfcfb; }
table.data tr.derived td { background: var(--surface); color: var(--ink-3); font-size: 12.4px; }
table.data tr.derived td:first-child { font-style: normal; }
td.pos { color: var(--accent-ink); font-weight: 600; }
td.neu { color: var(--ink-3); }
td.neg { color: #7d4b3c; font-weight: 600; }
td.mixed { color: var(--warn); font-weight: 600; }
.pill {
  display: inline-block; font-size: 10.5px; letter-spacing: 0.08em; font-weight: 600;
  padding: 2px 7px; border-radius: 2px; white-space: nowrap;
}
.pill.high { background: var(--accent); color: #fff; }
.pill.medium { background: var(--accent-soft); color: var(--accent-ink); border: 1px solid var(--accent-line); }
.pill.low { background: var(--surface-2); color: var(--ink-3); border: 1px solid var(--line-2); }
.table-note { font-size: 11.8px; color: var(--muted); line-height: 1.6; margin-top: 10px; max-width: 78em; }
.table-scroll-hint { font-size: 10.5px; color: var(--faint); margin-top: 6px; display: none; }

/* ---------- charts ---------- */
.chart-block { margin-top: 36px; }
.chart-head { margin-bottom: 14px; }
.chart-title { font-size: 15.5px; font-weight: 600; margin: 0; letter-spacing: -0.008em; }
.chart-sub { font-size: 12.8px; color: var(--muted); margin: 6px 0 0; max-width: 74em; line-height: 1.55; }
.chart-canvas {
  position: relative; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 18px 10px; background: #fff;
}
.chart-canvas svg { width: 100%; height: auto; display: block; overflow: visible; }
.chart-foot {
  display: flex; justify-content: space-between; gap: 18px; align-items: baseline;
  font-size: 10.8px; color: var(--faint); margin-top: 8px; flex-wrap: wrap;
}
.chart-legend { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 4px; }
.chart-legend span { display: inline-flex; align-items: center; gap: 6px; font-size: 11.5px; color: var(--ink-3); }
.chart-legend i { width: 9px; height: 9px; border-radius: 1px; display: inline-block; }
.tooltip {
  position: absolute; z-index: 20; pointer-events: none; background: #fff;
  border: 1px solid var(--line-2); box-shadow: 0 6px 22px rgba(16, 18, 20, 0.09);
  padding: 9px 11px; font-size: 11.5px; line-height: 1.5; color: var(--ink-2);
  border-radius: 3px; opacity: 0; transform: translateY(3px); transition: opacity 0.1s, transform 0.1s;
  max-width: 240px;
}
.tooltip.on { opacity: 1; transform: translateY(0); }
.tooltip b { font-weight: 600; color: var(--ink); }
.tooltip .tt-row { display: flex; justify-content: space-between; gap: 12px; }
.tooltip .tt-k { color: var(--muted); }
.chart-hit { cursor: default; }
.chart-hit:hover + .tooltip, .chart-hit:focus + .tooltip { opacity: 1; }

/* ---------- research page ---------- */
.research-shell {
  display: grid; grid-template-columns: 208px minmax(0, 1fr); gap: 66px;
  max-width: var(--max); margin: 0 auto; padding: 0 40px;
}
.toc-rail { position: relative; }
.toc { position: sticky; top: calc(var(--header-h) + 34px); padding-top: 64px; }
.toc-title {
  font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted);
  font-weight: 600; margin-bottom: 14px;
}
.toc ol { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); }
.toc li { margin: 0; }
.toc a {
  display: block; font-size: 12.6px; line-height: 1.45; color: var(--ink-3);
  padding: 8px 0 8px 14px; margin-left: -1px; border-left: 1px solid transparent;
}
.toc a:hover { color: var(--ink); text-decoration: none; }
.toc a.active { color: var(--accent-ink); border-left-color: var(--accent); font-weight: 600; }
.toc a .toc-n { display: block; font-size: 10px; letter-spacing: 0.08em; color: var(--faint); margin-bottom: 2px; }
.toc a.active .toc-n { color: var(--accent); }

.research-main { max-width: 812px; padding-bottom: 40px; min-width: 0; grid-column: 2; }
body[data-page="references"] .research-shell { grid-template-columns: minmax(0, 1fr); }
body[data-page="references"] .research-main { grid-column: 1; width: 100%; max-width: 860px; margin: 0 auto; }
.research-shell > * { min-width: 0; }
.table-block { min-width: 0; }
.table-scroll { max-width: 100%; }
.sec { padding-top: 64px; scroll-margin-top: calc(var(--header-h) + 24px); }
.sec:first-child { padding-top: 58px; }
.sec-head { border-top: 1px solid var(--line-2); padding-top: 26px; }
.sec-kicker { display: flex; align-items: center; gap: 12px; }
.sec-num { font-size: 11px; letter-spacing: 0.12em; color: var(--accent); font-weight: 600; }
.sec-src { font-size: 10.5px; color: var(--faint); letter-spacing: 0.04em; margin-left: auto; }
.sec h2 { font-size: 30px; letter-spacing: -0.02em; line-height: 1.16; margin: 10px 0 0; font-weight: 600; }
html[lang="zh"] .sec h2 { font-size: 26px; letter-spacing: -0.005em; }
.sec-sub { font-size: 14.2px; color: var(--muted); margin: 9px 0 0; line-height: 1.55; max-width: 62em; }

/* ---------- content blocks ---------- */
.lead {
  font-size: 19px; line-height: 1.62; color: var(--ink-2); margin: 28px 0 0; letter-spacing: -0.006em;
}
html[lang="zh"] .lead { font-size: 17.5px; line-height: 1.8; }
.prose { font-size: 16px; line-height: 1.75; color: var(--ink-2); margin: 18px 0 0; max-width: 42em; }
html[lang="zh"] .prose { font-size: 15.5px; line-height: 1.85; }
.block { margin-top: 40px; }
.block-title {
  font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3);
  font-weight: 600; margin: 0 0 16px; padding-bottom: 0;
}
.block-lead { font-size: 14px; color: var(--muted); margin: -8px 0 16px; max-width: 60em; }

/* kv grid */
.kv { border-top: 1px solid var(--line); }
.kv-row { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 26px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.kv-k { font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); font-weight: 600; padding-top: 3px; }
.kv-v { font-size: 14px; color: var(--ink-2); line-height: 1.6; }

/* keypoints */
.keypoints { list-style: none; margin: 0; padding: 0; }
.keypoints > li { padding: 16px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: 16px; }
.keypoints > li:first-child { border-top: 1px solid var(--line); }
.kp-idx { font-size: 11px; color: var(--accent); font-weight: 600; padding-top: 3px; font-variant-numeric: tabular-nums; }
.kp-body h4 { font-size: 15px; margin: 0; font-weight: 600; letter-spacing: -0.006em; line-height: 1.5; }
.kp-body p { font-size: 14px; color: var(--ink-3); margin: 6px 0 0; line-height: 1.68; }
.kp-ref {
  display: inline-block; font-size: 10.5px; color: var(--accent); border: 1px solid var(--accent-line);
  border-radius: 2px; padding: 0 4px; margin-left: 8px; vertical-align: 1px; letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

/* quote */
.quote { margin: 0; padding: 22px 0 22px 24px; border-left: 2px solid var(--accent-line); }
.quote blockquote { margin: 0; font-size: 18.5px; line-height: 1.6; color: var(--ink); letter-spacing: -0.008em; }
html[lang="zh"] .quote blockquote { font-size: 17px; line-height: 1.8; }
.quote-original {
  font-size: 12px; color: var(--faint); margin-top: 10px; line-height: 1.55;
  font-style: italic;
}
.quote cite { display: block; font-style: normal; font-size: 12px; color: var(--muted); margin-top: 12px; letter-spacing: 0.02em; }

/* cards */
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.card { background: #fff; padding: 22px 20px; }
.card-tag { font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.card h4 { font-size: 14.5px; margin: 8px 0 0; font-weight: 600; line-height: 1.4; }
.card p { font-size: 12.8px; color: var(--ink-3); margin: 8px 0 0; line-height: 1.6; }

/* callouts */
.callout { margin-top: 34px; padding: 18px 22px; background: var(--surface); border-left: 2px solid var(--line-2); }
.callout.verification { background: #fbfaf6; border-left-color: #c8b184; }
.callout.insight { background: var(--accent-soft); border-left-color: var(--accent); }
.callout.note { background: var(--surface); border-left-color: var(--ink-3); }
.callout-label {
  font-size: 10px; letter-spacing: 0.11em; text-transform: uppercase; font-weight: 600;
  color: var(--muted); margin-bottom: 7px;
}
.callout.verification .callout-label { color: var(--warn); }
.callout.insight .callout-label { color: var(--accent); }
.callout h4 { font-size: 14.5px; margin: 0 0 6px; font-weight: 600; }
.callout p { font-size: 13.6px; line-height: 1.68; color: var(--ink-2); margin: 0; }

/* schematic sentiment */
.schematic {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.sch-item { padding: 22px 20px 24px; position: relative; border-right: 1px solid var(--line); background: #fff; }
.sch-item:last-child { border-right: 0; }
.sch-when { font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
.sch-item h4 { font-size: 16px; margin: 10px 0 0; font-weight: 600; display: flex; align-items: center; gap: 8px; }
.sch-dot { width: 8px; height: 8px; border-radius: 50%; }
.sch-item p { font-size: 12.8px; color: var(--ink-3); margin: 8px 0 0; line-height: 1.6; }

/* timeline */
.timeline { position: relative; margin: 4px 0 0; padding-left: 0; }
.tl-track { position: relative; display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--line-2); padding-top: 18px; }
.tl-item { position: relative; padding-right: 12px; }
.tl-node {
  position: absolute; top: -23px; left: 0; width: 7px; height: 7px; border-radius: 50%;
  background: var(--line-2);
}
.tl-item.touring .tl-node { background: var(--accent); }
.tl-date { font-size: 10.5px; letter-spacing: 0.04em; color: var(--muted); font-variant-numeric: tabular-nums; }
.tl-count { font-size: 17px; font-weight: 600; margin-top: 2px; letter-spacing: -0.02em; }
.tl-title { font-size: 11.5px; color: var(--ink-3); margin-top: 4px; line-height: 1.45; }
.tl-note { font-size: 11.5px; color: var(--muted); margin-top: 14px; }

/* explore / CTA */
.explore { margin-top: 80px; background: var(--surface); border-top: 1px solid var(--line); padding: 54px 0 64px; }
.explore-grid { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: 56px; align-items: start; }
.explore h2 { font-size: 24px; margin: 0; letter-spacing: -0.015em; font-weight: 600; }
.explore p { font-size: 14px; color: var(--ink-3); margin: 12px 0 0; line-height: 1.68; }
.btn-row { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; padding: 11px 18px;
  border-radius: var(--radius); border: 1px solid var(--accent); background: var(--accent); color: #fff;
  transition: background 0.12s;
}
.btn:hover { background: var(--accent-2); color: #fff; text-decoration: none; }
.btn.ghost { background: #fff; color: var(--accent-ink); border-color: var(--line-2); }
.btn.ghost:hover { border-color: var(--accent); background: #fff; color: var(--accent); }
.explore-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 30px; border-top: 1px solid var(--line); }
.explore-list a {
  display: flex; justify-content: space-between; gap: 12px; padding: 11px 0;
  border-bottom: 1px solid var(--line); font-size: 13px; color: var(--ink-2);
}
.explore-list a:hover { color: var(--accent); text-decoration: none; }
.explore-list span.arrow { color: var(--faint); }

/* references page */
.ref-list { list-style: none; margin: 0; padding: 0; counter-reset: ref; }
.ref-item { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.ref-item:first-child { border-top: 1px solid var(--line); }
.ref-n { font-size: 11px; color: var(--accent); font-weight: 600; padding-top: 3px; font-variant-numeric: tabular-nums; }
.ref-title { font-size: 14.5px; color: var(--ink); line-height: 1.5; margin: 0; font-weight: 500; }
.ref-meta { font-size: 11.5px; color: var(--muted); margin-top: 5px; letter-spacing: 0.02em; }
.ref-note { font-size: 12.2px; color: var(--ink-3); margin-top: 6px; line-height: 1.55; }
.ref-flag {
  display: inline-block; font-size: 9.5px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--warn); border: 1px solid #ddd0b8; padding: 1px 5px; border-radius: 2px; margin-left: 8px;
  vertical-align: 1px;
}

/* quality notes */
.qn { border-top: 1px solid var(--line); }
.qn-row {
  display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 16px;
  padding: 18px 0; border-bottom: 1px solid var(--line);
}
.qn-id { font-size: 11px; color: var(--muted); font-weight: 600; letter-spacing: 0.04em; padding-top: 2px; font-variant-numeric: tabular-nums; }
.qn-area { font-size: 13.5px; font-weight: 600; margin: 0; display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.qn-page { font-size: 10px; letter-spacing: 0.06em; color: var(--faint); font-weight: 400; border: 1px solid var(--line); padding: 0 4px; border-radius: 2px; }
.qn-obs { font-size: 13px; color: var(--ink-3); margin: 6px 0 0; line-height: 1.6; }
.qn-handling { font-size: 12.6px; color: var(--accent-ink); margin: 6px 0 0; line-height: 1.6; padding-left: 12px; border-left: 2px solid var(--accent-line); }

/* figures */
.figures { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 34px 30px; margin-top: 30px; }
.figure { margin: 0; }
.figure img { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; width: 100%; }
.figure figcaption { font-size: 11.8px; color: var(--muted); margin-top: 9px; line-height: 1.55; }
.figure .fig-note { display: block; color: var(--faint); font-size: 11px; margin-top: 4px; }
.figure.inline { margin: 34px 0 0; }
.figure.inline img { border-radius: var(--radius); aspect-ratio: 3 / 2; object-fit: cover; width: 100%; }

/* appendix lists */
.plain-list { margin: 0; padding: 0; list-style: none; }
.plain-list li { font-size: 13.6px; color: var(--ink-3); padding: 9px 0 9px 18px; border-bottom: 1px solid var(--line); position: relative; line-height: 1.6; }
.plain-list li::before { content: "—"; position: absolute; left: 0; color: var(--faint); }
.subblock h3 { font-size: 15px; margin: 26px 0 0; font-weight: 600; }
.subblock p { font-size: 13.6px; color: var(--ink-3); margin: 6px 0 0; line-height: 1.68; }

/* contact */
.contact-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 26px; }
.contact-item { background: #fff; padding: 22px 20px; }
.contact-item h4 { font-size: 14px; margin: 0; font-weight: 600; }
.contact-item p { font-size: 12.6px; color: var(--ink-3); margin: 8px 0 0; line-height: 1.6; }
.contact-flag { font-size: 11.5px; color: var(--warn); margin-top: 16px; display: flex; gap: 8px; align-items: flex-start; }

/* footer */
.site-footer { border-top: 1px solid var(--line); margin-top: 0; padding: 44px 0 60px; background: #fff; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 48px; }
.site-footer p { font-size: 11.8px; color: var(--muted); line-height: 1.7; margin: 0 0 12px; }
.footer-meta { font-size: 10.5px; color: var(--faint); letter-spacing: 0.04em; }
.footer-label { font-size: 9.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 5px; }
html[lang="zh"] .footer-label { letter-spacing: 0.08em; }
.footer-links { display: flex; flex-wrap: wrap; gap: 14px 20px; font-size: 11.5px; margin-top: 14px; }
.footer-links a { color: var(--ink-3); }

/* back to top */
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 40;
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11px; letter-spacing: 0.06em; color: var(--ink-3);
  background: rgba(255, 255, 255, 0.94); border: 1px solid var(--line-2);
  padding: 8px 12px; border-radius: var(--radius);
  opacity: 0; pointer-events: none; transition: opacity 0.15s;
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { color: var(--accent); border-color: var(--accent); }

/* noscript */
.noscript {
  margin: 40px auto; max-width: 720px; border: 1px solid var(--line-2);
  padding: 22px; font-size: 14px; color: var(--ink-2); background: var(--surface);
}

/* load state */
.loading { padding: 90px 0; text-align: center; color: var(--muted); font-size: 13px; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .wrap, .research-shell, .site-header .bar { padding-left: 28px; padding-right: 28px; }
  .hero-grid { gap: 40px; }
  .research-shell { grid-template-columns: 174px minmax(0, 1fr); gap: 40px; }
  .kpi-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .hero { padding-top: 44px; }
  .hero-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero-media img { aspect-ratio: 3 / 2; }
  .hero-sub { font-size: 16px; }
  .hero-value { font-size: 15.5px; }
  .duo { grid-template-columns: 1fr; gap: 34px; }
  .finding-cols { grid-template-columns: 1fr; gap: 18px; }
  .cards { grid-template-columns: 1fr; }
  .schematic { grid-template-columns: 1fr; }
  .sch-item { border-right: 0; border-bottom: 1px solid var(--line); }
  .sch-item:last-child { border-bottom: 0; }
  .explore-grid { grid-template-columns: 1fr; gap: 30px; }
  .contact-grid { grid-template-columns: 1fr; }
  .figures { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .research-shell { grid-template-columns: 1fr; gap: 0; }
  .toc { position: static; padding-top: 34px; border-bottom: 1px solid var(--line); padding-bottom: 6px; }
  .toc ol { display: flex; flex-wrap: wrap; gap: 2px; border-left: 0; }
  .toc a { padding: 6px 10px; border-left: 0; border: 1px solid var(--line); border-radius: 2px; font-size: 12px; }
  .toc a.active { border-color: var(--accent); }
  .toc a .toc-n { display: none; }
  .research-main { max-width: none; grid-column: 1; }
  .kv-row { grid-template-columns: 1fr; gap: 4px; }
  .tl-track { grid-template-columns: repeat(4, minmax(0, 1fr)); row-gap: 26px; }
  .tl-item { padding-top: 4px; }
  .tl-node { display: none; }
  table.data { min-width: 640px; }
  .table-scroll-hint { display: block; }
}
@media (max-width: 720px) {
  body { font-size: 15.5px; }
  .site-header .bar {
    height: auto; flex-wrap: wrap; padding-top: 8px; padding-bottom: 0;
  }
  .brand { width: 100%; height: 44px; }
  .brand-report { display: none; }
  .nav {
    width: 100%; margin: 0; border-top: 1px solid var(--line);
    padding: 4px 0 6px; gap: 2px; overflow-x: auto; scrollbar-width: none;
  }
  .nav::-webkit-scrollbar { display: none; }
  .nav a { font-size: 12px; padding: 5px 6px; }
  .lang-toggle { margin-left: auto; flex: none; }
  .lang-toggle button { padding: 4px 7px; font-size: 11px; white-space: nowrap; }
  .chart-foot { flex-direction: column; gap: 4px; }
  .chart-canvas { padding: 14px 12px 8px; }
  .chart-legend { gap: 12px; }
  .hero-chips { grid-template-columns: 1fr; }
  .chip:nth-child(odd) { padding-right: 0; }

  .kpi-grid { grid-template-columns: 1fr; }
  .band { padding-top: 52px; }
  .band + .band { padding-top: 56px; }
  .sec { padding-top: 46px; }
  .sec h2 { font-size: 23px; }
  .lead { font-size: 16.5px; }
  .quote blockquote { font-size: 16px; }
  .finding { grid-template-columns: 36px minmax(0, 1fr); gap: 14px; }
  .finding h3 { font-size: 17px; }
  .explore-list { grid-template-columns: 1fr; }
  .page-intro { padding-top: 40px; }
  .wrap, .research-shell, .site-header .bar { padding-left: 20px; padding-right: 20px; }
  .to-top { right: 16px; bottom: 16px; }
}

/* ---------- print ---------- */
@media print {
  .site-header, .to-top, .scroll-progress, .lang-toggle, .explore, .toc-rail { display: none; }
  body { font-size: 11pt; }
  .hero-grid, .duo, .finding-cols, .explore-grid, .figures { grid-template-columns: 1fr; }
  .table-scroll { overflow: visible; }
  table.data { min-width: 0; }
  .sec { page-break-inside: avoid; }
  a { color: #000; }
}