:root {
  --wine: #711936;
  --wine-dark: #3f1224;
  --teal: #315b59;
  --teal-soft: #d9e1de;
  --pink: #e88daf;
  --pink-soft: #f5dce5;
  --cream: #f5efe7;
  --paper: #fffaf4;
  --brass: #b8792f;
  --ink: #231d1f;
  --muted: #74696b;
  --line: rgba(63, 18, 36, 0.2);
  --white: #fff;
  --max: 1180px;
  --header-height: 72px;
  --shadow: 0 18px 50px rgba(63, 18, 36, 0.12);
  color-scheme: light;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}
button, a { font: inherit; }
a { color: inherit; }
img { display: block; max-width: 100%; height: auto; }
button { letter-spacing: 0; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 8px 14px;
  background: var(--white);
  color: var(--wine);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  min-height: var(--header-height);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 10px max(28px, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(245, 239, 231, 0.96);
  backdrop-filter: blur(14px);
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 12px;
  text-decoration: none;
  white-space: nowrap;
}
.brand-cn { color: var(--wine); font-family: SimSun, "Songti SC", serif; font-size: 22px; font-weight: 900; }
.brand-en, .opening-code, .section-heading > p, .site-footer span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.chapter-nav {
  display: flex;
  justify-content: center;
  gap: 4px;
}
.chapter-nav a {
  position: relative;
  padding: 8px 11px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}
.chapter-nav a::after {
  position: absolute;
  right: 11px;
  bottom: 3px;
  left: 11px;
  height: 2px;
  background: var(--wine);
  content: "";
  transform: scaleX(0);
  transition: transform 180ms ease;
}
.chapter-nav a:hover, .chapter-nav a[aria-current="location"] { color: var(--wine); }
.chapter-nav a[aria-current="location"]::after { transform: scaleX(1); }
.summary-button {
  min-height: 40px;
  border: 1px solid var(--wine);
  border-radius: 2px;
  padding: 8px 14px;
  background: var(--wine);
  color: var(--white);
  cursor: pointer;
  font-size: 13px;
  font-weight: 800;
}
.summary-button:hover { background: var(--wine-dark); }
.summary-button[data-state="success"] { background: var(--teal); border-color: var(--teal); }

.opening {
  position: relative;
  min-height: calc(100vh - 118px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 1.08fr);
  align-items: start;
  gap: 4vw;
  padding: 60px max(28px, calc((100vw - var(--max)) / 2)) 72px;
  overflow: hidden;
}
.opening::before {
  position: absolute;
  top: 13%;
  bottom: 13%;
  left: max(12px, calc((100vw - var(--max)) / 2 - 28px));
  width: 3px;
  background: var(--pink);
  content: "";
}
.opening-copy { position: relative; z-index: 2; }
.opening-code { margin: 0 0 22px; color: var(--brass); }
.opening h1 {
  max-width: 640px;
  margin: 0;
  color: var(--wine-dark);
  font-family: SimSun, "Songti SC", serif;
  font-size: 50px;
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: 0;
}
.opening-lead { margin: 24px 0 8px; color: var(--wine); font-size: 20px; font-weight: 800; }
.opening-statement { max-width: 560px; margin: 0; color: #574d50; font-size: 17px; }
.opening-actions { display: flex; gap: 12px; margin: 30px 0 34px; }
.primary-link, .secondary-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--wine);
  border-radius: 2px;
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}
.primary-link { background: var(--wine); color: var(--white); }
.secondary-link { color: var(--wine); }
.opening-meta { display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; border-top: 1px solid var(--line); }
.opening-meta div { padding: 14px 12px 0 0; }
.opening-meta dt { color: var(--muted); font-size: 11px; }
.opening-meta dd { margin: 2px 0 0; color: var(--wine-dark); font-size: 14px; font-weight: 800; }
.opening-visual { position: relative; margin: 0; }
.opening-visual::before {
  position: absolute;
  z-index: -1;
  top: -18px;
  right: -18px;
  width: 58%;
  height: 42%;
  border: 1px solid var(--pink);
  content: "";
}
.opening-visual img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; box-shadow: var(--shadow); }
.opening-visual figcaption {
  position: absolute;
  right: -16px;
  bottom: -18px;
  max-width: 300px;
  border-left: 4px solid var(--pink);
  padding: 12px 18px;
  background: var(--paper);
  color: var(--wine);
  font-family: SimSun, "Songti SC", serif;
  font-size: 17px;
  font-weight: 900;
  box-shadow: 0 10px 30px rgba(63, 18, 36, 0.12);
}
.opening-next {
  position: absolute;
  bottom: 22px;
  left: max(28px, calc((100vw - var(--max)) / 2));
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-decoration: none;
}

.section { padding: 104px max(28px, calc((100vw - var(--max)) / 2)); }
.section-heading { display: grid; grid-template-columns: 160px minmax(0, 1fr); align-items: start; margin-bottom: 52px; }
.section-heading > p:first-child { margin: 10px 0 0; color: var(--brass); }
.section-heading h2 {
  max-width: 820px;
  margin: 0;
  color: var(--wine-dark);
  font-family: SimSun, "Songti SC", serif;
  font-size: 42px;
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: 0;
}
.section-intro { grid-column: 2; max-width: 720px; margin: 18px 0 0; color: var(--muted); }

.strategy { background: var(--paper); }
.strategy-grid { display: grid; grid-template-columns: 1.35fr 0.65fr; gap: 32px; }
.strategy-promise { border-top: 4px solid var(--wine); padding: 34px 0 0; }
.strategy-promise h3 { margin: 0 0 14px; color: var(--wine); font-size: 16px; }
.strategy-promise p { max-width: 700px; margin: 0 0 12px; font-size: 20px; line-height: 1.8; }
.strategy-signboard { border: 1px solid var(--wine); padding: 30px; background: var(--wine); color: var(--white); }
.strategy-signboard span, .transfer-map span, .lead-assets span, .safety-grid span { color: var(--pink); font-size: 11px; font-weight: 900; letter-spacing: 0.12em; }
.strategy-signboard strong { display: block; margin: 20px 0 10px; font-family: SimSun, "Songti SC", serif; font-size: 30px; }
.strategy-signboard p { margin: 0; font-size: 16px; font-weight: 800; }
.strategy-signboard small { display: block; margin-top: 20px; color: #f5dce5; }
.audience-band { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: 32px; margin-top: 54px; border-block: 1px solid var(--line); padding: 22px 0; }
.audience-band span { display: block; color: var(--muted); font-size: 12px; }
.audience-band strong { color: var(--teal); font-size: 20px; }
.audience-band p { margin: 0; }
.platform-split { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-top: 42px; background: var(--line); }
.platform-split article { position: relative; padding: 32px; background: var(--cream); }
.platform-split article > span { color: var(--wine); font-size: 14px; font-weight: 900; }
.platform-split h3 { max-width: 420px; margin: 10px 0 20px; font-size: 23px; line-height: 1.45; }
.platform-split ul { margin: 0; padding-left: 20px; color: #574d50; }
.cadence { margin: 28px 0 0; color: var(--teal); font-weight: 900; }

.evidence { background: var(--teal); color: var(--white); }
.evidence .section-heading h2, .evidence .section-heading > p:first-child { color: var(--white); }
.fact-line { display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid rgba(255,255,255,0.28); }
.fact-line div { padding: 34px; border-right: 1px solid rgba(255,255,255,0.28); }
.fact-line div:last-child { border: 0; }
.fact-line strong { display: block; color: var(--pink-soft); font-family: Georgia, serif; font-size: 48px; line-height: 1; }
.fact-line span { display: block; margin-top: 12px; color: #e6eeee; font-size: 13px; }
.capability-chain { display: flex; gap: 30px; margin: 0; border-bottom: 1px solid rgba(255,255,255,0.28); padding: 20px 34px; }
.capability-chain b { color: var(--pink-soft); }
.evidence-summary { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; margin-top: 54px; }
.evidence-summary p { margin: 0; color: #dfe8e6; font-size: 18px; }
.evidence-summary strong { border-left: 4px solid var(--pink); padding-left: 24px; font-family: SimSun, "Songti SC", serif; font-size: 23px; line-height: 1.7; }

.benchmarks { background: var(--cream); }
.benchmark-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 46px; }
.benchmark-tabs { display: flex; flex-direction: column; align-self: start; position: sticky; top: 104px; border-top: 1px solid var(--line); }
.benchmark-tabs button {
  min-height: 56px;
  border: 0;
  border-bottom: 1px solid var(--line);
  padding: 10px 4px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  text-align: left;
}
.benchmark-tabs button[aria-selected="true"] { color: var(--wine); font-weight: 900; }
.benchmark-tabs button[aria-selected="true"]::before { content: "→ "; color: var(--pink); }
.benchmark-panel { min-height: 460px; border-top: 4px solid var(--wine); padding-top: 24px; }
.benchmark-panel[hidden], .roadmap-panels > [hidden] { display: none; }
.benchmark-panel > header { display: flex; align-items: end; justify-content: space-between; gap: 20px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.benchmark-panel header span { color: var(--muted); font-size: 12px; }
.benchmark-panel h3 { margin: 2px 0 0; color: var(--wine-dark); font-family: SimSun, "Songti SC", serif; font-size: 40px; line-height: 1.2; }
.benchmark-panel header strong, .benchmark-panel header a { color: var(--teal); font-size: 13px; font-weight: 800; }
.benchmark-panel header a { text-underline-offset: 5px; }
.benchmark-metrics, .benchmark-profile { display: grid; grid-template-columns: repeat(2, 1fr); margin: 0; border-bottom: 1px solid var(--line); }
.benchmark-metrics div, .benchmark-profile div { padding: 24px 22px 24px 0; }
.benchmark-metrics dt, .benchmark-profile dt { color: var(--muted); font-size: 11px; }
.benchmark-metrics dd, .benchmark-profile dd { margin: 4px 0 0; color: var(--wine); font-weight: 900; }
.benchmark-copy { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 30px; }
.benchmark-panel-new .benchmark-copy { grid-template-columns: repeat(2, 1fr); }
.benchmark-copy h4 { margin: 0 0 8px; color: var(--teal); font-size: 14px; }
.benchmark-copy p { margin: 0; color: #574d50; font-size: 14px; }
.benchmark-panel blockquote { margin: 28px 0 0; border-left: 4px solid var(--pink); padding: 14px 20px; background: var(--pink-soft); color: var(--wine-dark); font-weight: 800; }
.sample-note { margin: 38px 0 0 266px; color: var(--muted); font-size: 12px; }

.benchmark-actions { background: var(--paper); }
.transfer-map { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); }
.transfer-map article { padding: 28px 22px; border-right: 1px solid var(--line); }
.transfer-map article:last-child { border: 0; }
.transfer-map span { color: var(--brass); }
.transfer-map h3 { margin: 22px 0 12px; color: var(--wine); font-size: 19px; }
.transfer-map p { margin: 0; color: #574d50; font-size: 14px; }
.transfer-map strong { display: block; margin-top: 18px; color: var(--teal); font-size: 13px; }
.application-table { margin-top: 44px; overflow-x: auto; border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th, td { padding: 16px 18px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--wine); color: var(--white); font-size: 12px; }
td { font-size: 13px; }
tbody tr:last-child td { border-bottom: 0; }

.content-system { background: var(--cream); }
.content-ratio { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; align-items: end; }
.content-ratio article { position: relative; min-height: calc(160px + (var(--ratio) * 2px)); display: flex; flex-direction: column; justify-content: flex-end; border-top: 6px solid var(--wine); padding: 20px 4px 0; }
.content-ratio article:nth-child(2) { border-color: var(--teal); }
.content-ratio article:nth-child(3) { border-color: var(--pink); }
.content-ratio article:nth-child(4) { border-color: var(--brass); }
.content-ratio article:nth-child(5) { border-color: var(--ink); }
.content-ratio strong { color: var(--wine-dark); font-family: Georgia, serif; font-size: 34px; }
.content-ratio span { font-weight: 900; }
.content-ratio p { margin: 8px 0 0; color: var(--muted); font-size: 12px; }
.program-list { margin-top: 70px; border-top: 1px solid var(--line); }
.program-list article { display: grid; grid-template-columns: 140px 280px 1fr; gap: 28px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.program-list span { color: var(--brass); font-size: 12px; font-weight: 800; }
.program-list h3, .program-list p { margin: 0; }
.program-list h3 { color: var(--wine); font-size: 19px; }
.program-list p { color: #574d50; }
.title-cta-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 60px; margin-top: 64px; }
.title-cta-grid h3 { margin: 0 0 20px; color: var(--teal); }
.title-cta-grid ol { margin: 0; padding-left: 24px; }
.title-cta-grid li { padding: 7px 0; border-bottom: 1px solid var(--line); }
.title-cta-grid dl { margin: 0; }
.title-cta-grid dl div { padding: 13px 0; border-bottom: 1px solid var(--line); }
.title-cta-grid dt { color: var(--wine); font-weight: 900; }
.title-cta-grid dd { margin: 3px 0 0; color: var(--muted); font-size: 14px; }

.ai-editorial { background: var(--wine-dark); color: var(--white); }
.ai-editorial .section-heading h2 { color: var(--white); }
.ai-editorial .section-intro { color: #d8c9ce; }
.character-stack { display: grid; gap: 1px; background: rgba(255,255,255,0.16); }
.character { display: grid; grid-template-columns: 32% 1fr; min-height: 480px; background: var(--wine-dark); }
.character:nth-child(even) { grid-template-columns: 1fr 32%; }
.character:nth-child(even) figure { order: 2; }
.character figure { min-height: 480px; margin: 0; overflow: hidden; background: #2b2024; }
.character img { width: 100%; height: 100%; object-fit: cover; object-position: center 16%; }
.character > div { align-self: center; padding: 50px 7vw; }
.character > div > span { color: var(--pink); font-size: 11px; font-weight: 900; letter-spacing: 0.12em; }
.character h3 { margin: 8px 0; font-family: SimSun, "Songti SC", serif; font-size: 48px; line-height: 1; }
.character > div > strong { color: var(--pink-soft); }
.character blockquote { margin: 24px 0 14px; border-left: 3px solid var(--pink); padding-left: 18px; font-family: SimSun, "Songti SC", serif; font-size: 22px; }
.character p { color: #ddcfd4; }
.character dl { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; margin: 28px 0 0; }
.character dt { color: var(--pink); font-size: 12px; font-weight: 900; }
.character dd { margin: 5px 0 0; color: #eadfe2; font-size: 13px; }
.episode-structure { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 64px; border-block: 1px solid rgba(255,255,255,0.2); }
.episode-structure article { padding: 28px 20px; border-right: 1px solid rgba(255,255,255,0.2); }
.episode-structure article:last-child { border: 0; }
.episode-structure span { color: var(--pink); font-family: Georgia, serif; font-size: 26px; }
.episode-structure h3 { margin: 10px 0 6px; font-size: 16px; }
.episode-structure p { margin: 0; color: #d8c9ce; font-size: 13px; }

.first-month { background: var(--paper); }
.month-grid { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); }
.month-grid article { padding: 28px 22px; border-right: 1px solid var(--line); }
.month-grid article:last-child { border: 0; }
.month-grid span { color: var(--brass); font-size: 12px; font-weight: 900; }
.month-grid h3 { margin: 10px 0; color: var(--wine); font-size: 22px; }
.month-grid strong { color: var(--teal); }
.month-grid p { color: var(--muted); font-size: 13px; }
.month-grid ul { margin: 18px 0 0; padding-left: 18px; font-size: 13px; }
.episode-list { margin: 56px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.episode-list li { display: grid; grid-template-columns: 60px 1fr 0.8fr; gap: 24px; align-items: center; padding: 16px 0; border-bottom: 1px solid var(--line); }
.episode-list span { color: var(--brass); font-family: Georgia, serif; }
.episode-list strong { color: var(--wine-dark); }
.episode-list em { color: var(--muted); font-size: 13px; }

.conversion { background: var(--teal-soft); }
.funnel { display: grid; grid-template-columns: repeat(6, 1fr); margin: 0; padding: 0; list-style: none; }
.funnel li { position: relative; border-top: 4px solid var(--teal); padding: 24px 16px 0 0; }
.funnel li::after { position: absolute; top: -9px; right: 6px; color: var(--wine); content: "→"; }
.funnel li:last-child::after { content: ""; }
.funnel > li > span { color: var(--wine); font-family: Georgia, serif; font-size: 28px; }
.funnel h3 { margin: 10px 0 4px; }
.funnel p { margin: 0; color: var(--muted); font-size: 12px; }
.funnel strong { display: block; margin-top: 12px; color: var(--teal); font-size: 12px; }
.lead-assets { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 70px; background: var(--line); }
.lead-assets article { padding: 30px; background: var(--paper); }
.lead-assets span { color: var(--brass); }
.lead-assets h3 { margin: 12px 0 8px; color: var(--wine); }
.lead-assets p { margin: 0; color: var(--muted); font-size: 13px; }
.lead-scores { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 40px; }
.lead-scores div { display: grid; grid-template-columns: 44px 1fr; gap: 14px; border-top: 1px solid var(--line); padding-top: 20px; }
.lead-scores strong { color: var(--wine); font-family: Georgia, serif; font-size: 34px; }
.lead-scores p { margin: 0; font-size: 13px; }

.roadmap { background: var(--cream); }
.roadmap-tabs { display: grid; grid-template-columns: repeat(3, 1fr); border-bottom: 1px solid var(--line); }
.roadmap-tabs button { min-height: 54px; border: 0; border-top: 3px solid transparent; background: transparent; color: var(--muted); cursor: pointer; font-weight: 800; }
.roadmap-tabs button[aria-selected="true"] { border-top-color: var(--wine); background: var(--paper); color: var(--wine); }
.roadmap-panels { min-height: 245px; background: var(--paper); }
.roadmap-panels article { min-height: 245px; display: grid; grid-template-columns: 120px 1fr; align-content: center; gap: 8px 30px; padding: 38px 54px; }
.roadmap-panels span { grid-row: 1 / 4; align-self: center; color: var(--pink); font-family: SimSun, "Songti SC", serif; font-size: 28px; font-weight: 900; }
.roadmap-panels h3, .roadmap-panels p { margin: 0; }
.roadmap-panels h3 { color: var(--wine-dark); font-size: 26px; }
.roadmap-panels p { color: var(--muted); }
.roadmap-panels strong { color: var(--teal); }
.kpi-line { display: grid; grid-template-columns: repeat(6, 1fr); margin-top: 52px; border-block: 1px solid var(--line); }
.kpi-line div { padding: 20px 12px; border-right: 1px solid var(--line); }
.kpi-line div:last-child { border: 0; }
.kpi-line strong { display: block; color: var(--wine); font-family: Georgia, serif; font-size: 22px; }
.kpi-line span { color: var(--muted); font-size: 12px; }
.sop-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 60px; border-top: 1px solid var(--line); }
.sop-grid article { padding: 26px 22px 0 0; }
.sop-grid h3 { margin: 0 0 8px; color: var(--teal); }
.sop-grid p { color: var(--muted); font-size: 13px; }
.sop-grid strong { color: var(--wine); font-size: 12px; }

.brand-safety { background: var(--paper); }
.palette-row { display: grid; grid-template-columns: repeat(5, 1fr); height: 74px; margin-bottom: 54px; }
.palette-row span { display: flex; align-items: end; padding: 10px; color: var(--white); font-size: 11px; font-weight: 900; }
.palette-row [data-color="pink"] { background: var(--pink); color: var(--wine-dark); }
.palette-row [data-color="wine"] { background: var(--wine); }
.palette-row [data-color="teal"] { background: var(--teal); }
.palette-row [data-color="cream"] { background: var(--cream); color: var(--wine-dark); }
.palette-row [data-color="brass"] { background: var(--brass); }
.safety-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); }
.safety-grid article { padding: 26px 24px; border-right: 1px solid var(--line); }
.safety-grid article:last-child { border: 0; }
.safety-grid span { color: var(--brass); }
.safety-grid p { margin: 12px 0 0; }
.avoid-line { display: grid; grid-template-columns: 130px 1fr; gap: 24px; margin: 42px 0 0; border-left: 4px solid var(--pink); padding: 14px 20px; background: var(--pink-soft); }
.avoid-line strong { color: var(--wine); }

.decision { min-height: 720px; display: grid; align-items: center; background: var(--wine); color: var(--white); }
.decision-inner { max-width: 880px; margin: 0 auto; text-align: center; }
.decision-inner > p:first-child { color: var(--pink-soft); font-size: 11px; font-weight: 900; letter-spacing: 0.15em; }
.decision h2 { margin: 24px 0; font-family: SimSun, "Songti SC", serif; font-size: 48px; line-height: 1.3; }
.decision blockquote { margin: 0; color: var(--pink-soft); font-family: SimSun, "Songti SC", serif; font-size: 26px; font-weight: 900; }
.next-step { display: grid; grid-template-columns: 90px 1fr; gap: 20px; margin-top: 50px; border-block: 1px solid rgba(255,255,255,0.3); padding: 22px 0; text-align: left; }
.next-step span { color: var(--pink-soft); font-size: 12px; font-weight: 900; }

.site-footer { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 40px; padding: 32px max(28px, calc((100vw - var(--max)) / 2)); background: var(--wine-dark); color: #e7dce0; }
.site-footer div { display: flex; flex-direction: column; }
.site-footer strong { font-family: SimSun, "Songti SC", serif; font-size: 20px; }
.site-footer span { color: #bdaeb3; }
.site-footer p { margin: 0; color: #bdaeb3; font-size: 11px; }
.site-footer a { color: var(--pink-soft); font-size: 12px; }
.copy-source { position: fixed; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.copy-status { position: fixed; z-index: 70; right: 24px; bottom: 24px; min-height: 0; border-radius: 2px; background: var(--teal); color: var(--white); font-size: 13px; font-weight: 800; box-shadow: var(--shadow); }
.copy-status:not(:empty) { padding: 12px 18px; }

:focus-visible { outline: 3px solid var(--pink); outline-offset: 3px; }

@media (max-width: 980px) {
  .site-header { grid-template-columns: auto 1fr; }
  .chapter-nav { grid-column: 1 / -1; grid-row: 2; justify-content: flex-start; overflow-x: auto; }
  .summary-button { justify-self: end; }
  .opening { grid-template-columns: 1fr; padding-top: 52px; }
  .opening-copy { max-width: 720px; }
  .opening-visual { max-width: 760px; }
  .strategy-grid, .evidence-summary { grid-template-columns: 1fr; }
  .transfer-map, .month-grid, .safety-grid { grid-template-columns: repeat(2, 1fr); }
  .transfer-map article:nth-child(2), .month-grid article:nth-child(2), .safety-grid article:nth-child(2) { border-right: 0; }
  .transfer-map article, .month-grid article, .safety-grid article { border-bottom: 1px solid var(--line); }
  .content-ratio { grid-template-columns: repeat(3, 1fr); }
  .funnel { grid-template-columns: repeat(3, 1fr); gap: 28px 0; }
  .kpi-line { grid-template-columns: repeat(3, 1fr); }
  .sop-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  :root { --header-height: 110px; }
  html { scroll-padding-top: 124px; }
  body { font-size: 15px; }
  .site-header { min-height: 0; gap: 8px 16px; padding: 9px 16px 7px; }
  .brand-en { display: none; }
  .brand-cn { font-size: 20px; }
  .summary-button { min-height: 36px; padding: 7px 11px; font-size: 12px; }
  .chapter-nav { gap: 0; margin: 0 -16px; padding: 0 12px; scrollbar-width: none; }
  .chapter-nav::-webkit-scrollbar { display: none; }
  .chapter-nav a { flex: 0 0 auto; min-height: 38px; padding: 7px 10px; }
  .opening { min-height: auto; grid-template-columns: 1fr; gap: 18px; padding: 32px 20px 28px; }
  .opening::before { left: 8px; }
  .opening-code { margin-bottom: 16px; }
  .opening h1 { font-size: 34px; line-height: 1.22; }
  .opening-lead { margin-top: 18px; font-size: 17px; }
  .opening-statement { font-size: 15px; }
  .opening-actions { flex-wrap: wrap; margin: 18px 0 18px; }
  .primary-link, .secondary-link { flex: 1 1 140px; }
  .opening-meta { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .opening-meta div { display: block; padding: 9px 6px 0 0; }
  .opening-meta dt { font-size: 10px; }
  .opening-meta dd { font-size: 12px; }
  .opening-visual img { height: 140px; object-fit: cover; }
  .opening-visual::before { top: -10px; right: -10px; }
  .opening-visual figcaption { right: 0; bottom: 0; max-width: 250px; padding: 8px 12px; font-size: 13px; }
  .opening-next { display: none; }
  .section { padding: 76px 20px; }
  .section-heading { grid-template-columns: 1fr; margin-bottom: 36px; }
  .section-heading > p:first-child { margin: 0 0 10px; }
  .section-heading h2 { font-size: 31px; line-height: 1.34; }
  .section-intro { grid-column: 1; margin-top: 14px; }
  .strategy-grid, .audience-band, .platform-split, .evidence-summary, .benchmark-layout, .title-cta-grid { grid-template-columns: 1fr; }
  .strategy-promise p { font-size: 17px; }
  .strategy-signboard { padding: 24px; }
  .audience-band { gap: 12px; }
  .platform-split { gap: 1px; }
  .platform-split article { padding: 25px 20px; }
  .fact-line { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .fact-line div { padding: 22px 10px; }
  .fact-line strong { font-size: 31px; }
  .capability-chain { display: block; padding: 18px 0; }
  .capability-chain b { display: block; margin-bottom: 5px; }
  .evidence-summary { gap: 28px; }
  .evidence-summary strong { font-size: 19px; }
  .benchmark-layout { gap: 24px; }
  .benchmark-tabs { position: static; flex-direction: row; overflow-x: auto; border-bottom: 1px solid var(--line); scrollbar-width: none; }
  .benchmark-tabs::-webkit-scrollbar { display: none; }
  .benchmark-tabs button { flex: 0 0 auto; min-width: 110px; min-height: 48px; border: 0; text-align: center; }
  .benchmark-panel { min-height: 620px; }
  .benchmark-panel > header { align-items: start; flex-direction: column; }
  .benchmark-panel h3 { font-size: 34px; }
  .benchmark-metrics, .benchmark-profile, .benchmark-copy, .benchmark-panel-new .benchmark-copy { grid-template-columns: 1fr; }
  .benchmark-metrics div, .benchmark-profile div { padding: 16px 0; }
  .benchmark-copy { gap: 18px; }
  .sample-note { margin: 28px 0 0; }
  .transfer-map, .content-ratio, .month-grid, .lead-assets, .lead-scores, .safety-grid { grid-template-columns: 1fr; }
  .transfer-map article, .month-grid article, .safety-grid article { border-right: 0; }
  .content-ratio { gap: 22px; }
  .content-ratio article { min-height: auto; border-top-width: 4px; padding-top: 14px; }
  .program-list article { grid-template-columns: 1fr; gap: 6px; }
  .title-cta-grid { gap: 45px; }
  .character, .character:nth-child(even) { grid-template-columns: 1fr; }
  .character:nth-child(even) figure { order: 0; }
  .character figure { min-height: 0; aspect-ratio: 4 / 5; }
  .character > div { padding: 34px 24px 44px; }
  .character h3 { font-size: 40px; }
  .character dl { grid-template-columns: 1fr; }
  .episode-structure { grid-template-columns: 1fr 1fr; }
  .episode-structure article:nth-child(2) { border-right: 0; }
  .episode-structure article { border-bottom: 1px solid rgba(255,255,255,0.2); }
  .episode-list li { grid-template-columns: 42px 1fr; gap: 12px; }
  .episode-list em { grid-column: 2; }
  .funnel { grid-template-columns: 1fr 1fr; gap: 26px 12px; }
  .funnel li::after { display: none; }
  .lead-scores { gap: 18px; }
  .roadmap-tabs button { font-size: 13px; }
  .roadmap-panels { min-height: 330px; }
  .roadmap-panels article { min-height: 330px; grid-template-columns: 1fr; align-content: center; padding: 30px 24px; }
  .roadmap-panels span { grid-row: auto; font-size: 22px; }
  .roadmap-panels h3 { font-size: 21px; }
  .kpi-line { grid-template-columns: repeat(2, 1fr); }
  .sop-grid { grid-template-columns: 1fr; }
  .palette-row { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .palette-row span { padding: 7px 4px; }
  .avoid-line { grid-template-columns: 1fr; gap: 4px; }
  .decision { min-height: 680px; }
  .decision h2 { font-size: 36px; }
  .decision blockquote { font-size: 21px; }
  .next-step { grid-template-columns: 1fr; gap: 8px; }
  .site-footer { grid-template-columns: 1fr; gap: 18px; padding: 32px 20px; }
  .copy-status { right: 16px; bottom: 16px; left: 16px; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}

@media print {
  .site-header, .opening-actions, .opening-next, .copy-status { display: none !important; }
  body { background: var(--white); }
  .opening, .section { padding: 32px; break-inside: avoid; }
  .is-enhanced [hidden] { display: block !important; }
  .decision { min-height: auto; }
}