:root {
  color-scheme: light;
  --bg: #f7f4f1;
  --paper: #fffdfb;
  --ink: #1d1a18;
  --muted: #726863;
  --line: #dcd2cc;
  --accent: #d7473b;
  --accent-dark: #a92d26;
  --on-accent: #fffaf7;
  --radius: 10px;
  --max: 1240px;
  --ease: cubic-bezier(.16, 1, .3, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
[id] { scroll-margin-top: 88px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Avenir Next", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
p, h1, h2, h3, figure { margin: 0; }
.section-shell { width: min(var(--max), calc(100% - 64px)); margin: 0 auto; }

.nav-shell {
  position: sticky; top: 0; z-index: 10;
  height: 72px; padding: 0 max(32px, calc((100vw - var(--max)) / 2));
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 32px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 75%, transparent);
  backdrop-filter: blur(16px);
}
.brand img { width: 174px; }
nav { display: flex; gap: 30px; font-size: 13px; font-weight: 700; color: var(--muted); }
nav a:hover { color: var(--accent); }
.nav-cta, .button { border-radius: var(--radius); font-weight: 800; transition: transform .25s var(--ease), background .25s ease; }
.nav-cta { justify-self: end; padding: 11px 18px; background: var(--ink); color: var(--paper); font-size: 13px; }
.nav-cta:hover, .button:hover { transform: translateY(-2px); }

.hero {
  min-height: auto; padding: clamp(36px, 4vh, 52px) 0 clamp(42px, 5vh, 60px);
  display: grid; grid-template-columns: minmax(0, .95fr) minmax(460px, 1.05fr); gap: clamp(42px, 5vw, 72px); align-items: center;
}
.hero > * { min-width: 0; }
.hero-position { width: max-content; padding-bottom: 10px; border-bottom: 3px solid var(--accent); color: var(--ink); font-size: 15px; font-weight: 850; }
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 900; letter-spacing: .16em; }
h2 { font-family: inherit; font-weight: 780; letter-spacing: -.055em; }
h1 { max-width: 720px; margin-top: 26px; font-size: clamp(48px, 5vw, 70px); line-height: 1.08; font-weight: 780; letter-spacing: -.055em; }
.hero-ai { font-weight: 450; }
.mobile-break { display: none; }
.hero-lede { max-width: 520px; margin-top: 26px; color: var(--muted); font-size: clamp(17px, 1.45vw, 20px); line-height: 1.65; }
.hero-stats { max-width: 520px; margin-top: 28px; display: grid; grid-template-columns: .8fr 1.2fr; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.hero-stats > div { padding: 18px 22px 18px 0; display: flex; align-items: baseline; gap: 10px; }
.hero-stats > div + div { padding-left: 22px; border-left: 1px solid var(--line); }
.hero-stats strong { color: var(--accent); font-size: clamp(27px, 2.4vw, 36px); line-height: 1; letter-spacing: -.04em; }
.hero-stats span { color: var(--muted); font-size: 12px; font-weight: 750; line-height: 1.4; }
.hero-actions { margin-top: 28px; display: flex; align-items: center; gap: 26px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 24px; }
.button-primary { background: var(--accent); color: var(--on-accent); box-shadow: 0 14px 34px rgba(169,45,38,.2); }
.button-primary:hover { background: var(--accent-dark); }
.text-link { padding: 10px 0; border-bottom: 1px solid var(--ink); font-size: 14px; font-weight: 800; }

.hero-evidence { margin: 0; }
.hero-proof-board { padding: 16px; display: grid; grid-template-columns: 1fr; gap: 12px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); box-shadow: 0 22px 54px rgba(57,39,32,.14); }
.hero-logo-proof { min-width: 0; min-height: 330px; padding: 18px; display: flex; flex-direction: column; justify-content: center; border-radius: var(--radius); background: #f7f4f1; }
.hero-logo-proof > span, .hero-result-proof > span { font-size: 11px; font-weight: 850; letter-spacing: .08em; }
.hero-logo-proof > span { color: var(--muted); }
.hero-logo-proof img { width: 100%; flex: 1; min-height: 0; margin-top: 10px; object-fit: contain; object-position: center; }
.hero-result-proof { min-width: 0; min-height: 142px; padding: 22px 24px; display: grid; grid-template-columns: 1fr auto; grid-template-rows: auto 1fr; column-gap: 24px; align-items: end; border-radius: var(--radius); background: var(--accent); color: var(--on-accent); }
.hero-result-proof > span { align-self: start; color: #ffd8d3; font-size: 12px; }
.hero-result-proof strong { grid-row: 1 / 3; grid-column: 2; align-self: center; font-size: clamp(42px, 4.3vw, 62px); line-height: .95; letter-spacing: -.06em; }
.hero-result-proof b { font-size: 21px; }
.hero-result-proof p { margin-top: 5px; color: #ffe0dc; font-size: 14px; }
.hero-evidence figcaption { padding: 12px 2px 0; color: var(--muted); font-size: 11px; line-height: 1.5; }
.hero-evidence figcaption strong { color: var(--ink); font-size: 13px; }

.diagnosis { background: var(--ink); color: #f4efeb; border-radius: var(--radius); overflow: hidden; box-shadow: 0 28px 80px rgba(47,35,30,.18); transform: rotate(1.2deg); }
.diagnosis-head { padding: 24px 28px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid #4b4541; }
.diagnosis-head span { font: 700 11px ui-monospace, monospace; color: #bcb2ac; }
.diagnosis-head strong { font-size: 14px; }
.diagnosis dl { margin: 0; padding: 14px 28px; }
.diagnosis dl div { padding: 19px 0; display: grid; grid-template-columns: 100px 1fr; gap: 24px; border-bottom: 1px solid #413c39; }
.diagnosis dt { color: #a99f99; font-size: 13px; }
.diagnosis dd { margin: 0; font-size: 15px; font-weight: 800; }
.diagnosis > p { padding: 24px 28px 28px; color: #e66b61; font-family: Georgia, serif; font-size: 21px; line-height: 1.45; }

.channel-support { padding-top: 72px; padding-bottom: 38px; }
.channel-support-head { max-width: 680px; }
.channel-support-head h2 { font-family: inherit; font-size: clamp(30px, 3vw, 42px); font-weight: 800; letter-spacing: -.04em; }
.channel-support-head p { margin-top: 14px; color: var(--muted); font-size: 16px; line-height: 1.6; }
.channel-list { margin-top: 36px; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); background: var(--paper); }
.channel-list article { min-height: 108px; padding: 18px 24px; display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 16px; align-items: center; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: transparent; transition: background-color 220ms ease, color 220ms ease; }
.channel-list article > img { width: 28px; height: 28px; object-fit: contain; }
.channel-list article:hover { background: color-mix(in srgb, var(--accent) 7%, var(--paper)); }
.channel-list article:hover h3 { color: var(--accent-dark); }
.channel-list h3 { font-size: 17px; line-height: 1.2; }
.channel-list p { margin-top: 8px; color: var(--muted); font-size: 13px; line-height: 1.5; }

.questions, .method, .outcomes, .proof, .wechat { padding-top: 140px; padding-bottom: 140px; }
.section-intro { max-width: 790px; }
h2 { font-size: clamp(40px, 5.2vw, 68px); line-height: 1.08; }
.section-intro > p { max-width: 630px; margin-top: 24px; color: var(--muted); font-size: 18px; line-height: 1.7; }
.question-grid { margin-top: 72px; display: grid; grid-template-columns: 1.3fr .8fr 1fr; grid-template-rows: 260px 260px; gap: 16px; }
.question-grid article { position: relative; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: color-mix(in srgb, var(--paper) 74%, transparent); }
.question-grid p { max-width: 17ch; font-size: clamp(22px, 2.2vw, 31px); line-height: 1.3; font-weight: 760; }
.question-grid span { position: absolute; right: 26px; bottom: 24px; color: var(--muted); font: 800 11px ui-monospace, monospace; letter-spacing: .12em; }
.question-lead { grid-row: span 2; display: flex; align-items: flex-end; background: var(--ink) !important; color: #f5efeb; }
.question-lead p { max-width: 13ch; font-family: "Roboto Serif", "Songti SC", Georgia, serif; font-size: clamp(34px, 4vw, 52px); }
.question-item.visual { padding: 0; }
.question-item.visual img { width: 100%; height: 100%; object-fit: cover; }
.question-item.accent { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.question-item.accent span { color: #ffd6d0; }

.method { display: grid; grid-template-columns: .8fr 1.2fr; gap: 9vw; align-items: start; }
.method-list article { padding: 32px 0; border-bottom: 1px solid var(--line); }
.method-list article:first-child { padding-top: 0; }
.method-list h3 { font-size: clamp(24px, 2.2vw, 32px); line-height: 1.25; }
.method-list p { max-width: 500px; margin-top: 12px; color: var(--muted); font-size: 16px; line-height: 1.65; }

.outcomes { display: grid; grid-template-columns: .85fr 1.15fr; gap: 8vw; }
.outcome-title { position: sticky; top: 120px; align-self: start; }
.outcome-title > p { margin-bottom: 22px; color: var(--accent); font-size: 11px; font-weight: 900; letter-spacing: .14em; }
.outcome-map { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.outcome-map article { min-height: 250px; padding: 28px; display: flex; flex-direction: column; justify-content: flex-end; border-radius: var(--radius); background: var(--paper); border: 1px solid var(--line); }
.outcome-map article:nth-child(1), .outcome-map article:nth-child(4) { background: var(--ink); color: #f4efeb; }
.outcome-map span { margin-bottom: auto; color: var(--accent); font-size: 12px; font-weight: 800; }
.outcome-map h3 { font: 650 clamp(26px, 2.5vw, 36px) Georgia, serif; }
.outcome-map p { margin-top: 12px; color: var(--muted); line-height: 1.55; }
.outcome-map article:nth-child(1) p, .outcome-map article:nth-child(4) p { color: #bcb2ac; }

.proof { display: grid; grid-template-columns: .8fr 1.2fr; gap: 7vw; align-items: center; }
.proof-copy > p { margin-top: 22px; color: var(--muted); font-size: 17px; line-height: 1.7; }
.logo-wall { margin-top: 48px; display: grid; grid-template-columns: 1fr 1fr; gap: 20px 34px; align-items: center; }
.logo-wall img { max-width: 130px; max-height: 42px; object-fit: contain; filter: grayscale(1); opacity: .72; }
.proof-visual { border-radius: var(--radius); overflow: hidden; box-shadow: 0 26px 70px rgba(57,39,32,.16); }
.proof-visual img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }

.clients, .case-stories, .channel-proof { padding-top: 140px; padding-bottom: 140px; }
.clients .section-intro { max-width: none; }
.clients .section-intro h2 { font-size: clamp(40px, 4.1vw, 54px); white-space: nowrap; }
.client-logo-grid {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}
.client-logo-grid img {
  width: 100%;
  height: 118px;
  padding: 30px 24px;
  object-fit: contain;
  filter: grayscale(1);
  border-right: 1px solid var(--line);
}
.client-logo-grid img:last-child { border-right: 0; }
.clients { padding-bottom: 72px; }
.client-results-board { margin-top: 24px; min-height: 330px; padding: clamp(32px, 5vw, 64px); display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(48px, 7vw, 96px); align-items: end; border-radius: var(--radius); background: #1d1a18; color: #f7f2ef; }
.client-results-story > span { color: var(--accent); font: 850 11px ui-monospace, monospace; letter-spacing: .12em; }
.client-results-story h3 { margin-top: 30px; font-size: clamp(34px, 4vw, 54px); line-height: 1.08; letter-spacing: -.05em; }
.client-results-story p { max-width: 440px; margin-top: 22px; color: #bdb3ad; font-size: 16px; line-height: 1.65; }
.client-results-metrics { margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid #4b4541; border-bottom: 1px solid #4b4541; }
.client-results-metrics > div { min-width: 0; padding: 30px 24px 28px; }
.client-results-metrics > div:first-child { padding-left: 0; }
.client-results-metrics > div + div { border-left: 1px solid #4b4541; }
.client-results-metrics dt { color: var(--accent); font-size: clamp(32px, 3.5vw, 48px); font-weight: 850; line-height: 1; letter-spacing: -.05em; }
.client-results-metrics dd { margin: 14px 0 0; color: #d5ccc7; font-size: 12px; font-weight: 750; line-height: 1.5; }

.case-stories { padding-top: 72px; padding-bottom: 64px; }
.case-heading { max-width: 820px; margin-bottom: 72px; }
.case-heading h2 { margin-top: 22px; }
.case-feature {
  padding: 18px;
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  gap: 18px;
  align-items: stretch;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}
.case-feature.reverse { grid-template-columns: .72fr 1.28fr; }
.case-copy { padding: clamp(26px, 4vw, 54px); display: flex; flex-direction: column; justify-content: flex-end; background: var(--accent); color: var(--on-accent); border-radius: var(--radius); }
.case-copy span, .case-card span { margin-bottom: auto; font: 800 11px ui-monospace, monospace; letter-spacing: .1em; }
.case-copy h3 { margin-top: 64px; font-family: inherit; font-size: clamp(32px, 3.6vw, 50px); font-weight: 750; line-height: 1.12; letter-spacing: -.045em; }
.case-copy p { margin-top: 20px; color: #ffe1dd; font-size: 16px; line-height: 1.65; }
.case-copy strong { margin-top: 32px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.45); font-size: clamp(21px, 2vw, 28px); }
.case-image-link { position: relative; display: block; min-width: 0; overflow: hidden; border-radius: var(--radius); background: var(--paper); }
.case-image-link img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s var(--ease); }
.latest-deck-case img { object-fit: contain; background: #fff; }
.case-image-link span { position: absolute; right: 14px; bottom: 14px; padding: 9px 12px; border-radius: var(--radius); background: rgba(29,26,24,.88); color: #fffaf7; font-size: 12px; font-weight: 800; backdrop-filter: blur(8px); }
.case-image-link:hover img { transform: scale(1.015); }
.case-feature > .case-image-link { min-height: 500px; }
.case-pair { margin: 22px 0; display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.case-card { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.case-card > .case-image-link { aspect-ratio: 16 / 10; border-radius: 0; }
.case-card > div { min-height: 184px; padding: 26px 28px 28px; display: flex; flex-direction: column; }
.case-card span { margin-bottom: 0; color: var(--accent); }
.case-card h3 { margin-top: 24px; font-family: inherit; font-size: clamp(22px, 2vw, 28px); font-weight: 750; line-height: 1.2; letter-spacing: -.035em; white-space: nowrap; }
.case-card strong { margin-top: 20px; color: var(--accent); font-size: 17px; }
.case-note { margin-top: 18px; color: var(--muted); font-size: 12px; text-align: right; }

.channel-gallery { margin-top: 64px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.channel-gallery figure { margin: 0; overflow: hidden; border-radius: var(--radius); background: var(--paper); border: 1px solid var(--line); }
.channel-gallery .channel-main { grid-column: 1 / -1; }
.channel-gallery img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; background: #fff; }
.channel-gallery figcaption { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; padding: 18px 20px; color: var(--muted); font-size: 13px; }
.channel-gallery figcaption strong { color: var(--ink); font-size: 15px; }
.channel-gallery figcaption span { text-align: right; }

.channel-proof { padding-top: 64px; padding-bottom: 64px; }
.wechat { margin-top: 64px; margin-bottom: 64px; padding-left: clamp(32px, 6vw, 88px); padding-right: clamp(32px, 6vw, 88px); display: grid; grid-template-columns: 1fr .8fr; gap: 8vw; align-items: center; background: var(--accent); color: var(--on-accent); border-radius: var(--radius); }
.wechat .eyebrow { color: #ffd6d0; }
.wechat-copy h2 { margin-top: 20px; font-size: clamp(40px, 4vw, 54px); white-space: nowrap; }
.wechat-copy > p:not(.eyebrow) { max-width: 620px; margin-top: 24px; font-size: 18px; line-height: 1.65; }
.wechat-copy ul { margin: 28px 0 0; padding: 0; display: flex; gap: 12px; list-style: none; flex-wrap: wrap; }
.wechat-copy li { padding: 9px 13px; border: 1px solid rgba(255,255,255,.55); border-radius: var(--radius); font-size: 13px; font-weight: 800; }
.wechat-card { padding: 24px; display: grid; grid-template-columns: 156px 1fr; gap: 24px; align-items: center; background: var(--paper); color: var(--ink); border-radius: var(--radius); box-shadow: 0 24px 60px rgba(115,27,22,.2); }
.wechat-qr { width: 100%; height: auto; border-radius: 6px; background: #fff; }
.wechat-card > div:last-child > strong { font-size: 21px; }
.wechat-card p { margin-top: 8px; color: var(--muted); font-size: 13px; line-height: 1.5; }
.copy-button { width: 100%; margin-top: 18px; padding: 11px 14px 10px; display: flex; flex-direction: column; align-items: center; gap: 2px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--ink); color: var(--paper); font: 800 13px inherit; cursor: pointer; transition: transform .2s var(--ease), background-color .2s ease; }
.copy-button span { line-height: 1.35; }
.copy-button small { color: color-mix(in srgb, var(--paper) 72%, transparent); font-size: 10px; font-weight: 650; line-height: 1.3; }
.copy-button:hover { background: var(--accent-dark); }
.copy-button:active { transform: translateY(1px); }
.copy-button:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 40%, transparent); outline-offset: 3px; }
.copy-button.is-copied { background: #2f7d4a; border-color: #2f7d4a; }
.floating-cta { position: fixed; right: 24px; bottom: 24px; z-index: 8; padding: 15px 20px; border-radius: var(--radius); background: var(--accent); color: var(--on-accent); box-shadow: 0 16px 42px rgba(169,45,38,.28); font-size: 14px; font-weight: 900; transition: transform .25s var(--ease), background .25s ease, opacity .2s ease, visibility .2s ease; }
.floating-cta:hover { transform: translateY(-2px); background: var(--accent-dark); }
.floating-cta.is-hidden { opacity: 0; visibility: hidden; transform: translateY(12px); pointer-events: none; }

footer { width: min(var(--max), calc(100% - 64px)); margin: 0 auto; padding: 30px 0 44px; display: flex; align-items: center; gap: 28px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
footer img { width: 154px; }
footer p { margin-left: auto; }
footer a { font-weight: 800; color: var(--ink); }

.reveal { opacity: 1; transform: none; transition: transform .45s var(--ease); }

@media (prefers-color-scheme: dark) {
  :root { --bg: #1c1917; --paper: #25211f; --ink: #f1ebe7; --muted: #b8ada7; --line: #4a423e; --accent: #e35a4e; --accent-dark: #cf453a; --on-accent: #fff8f4; }
  .brand img, footer img { filter: brightness(0) invert(1); }
  .diagnosis { background: #292421; }
  .question-lead, .outcome-map article:nth-child(1), .outcome-map article:nth-child(4) { background: #292421 !important; }
  .logo-wall img { filter: grayscale(1) brightness(1.7); }
  .client-logo-grid img { filter: grayscale(1) brightness(1.65); }
  .channel-list article > img { filter: brightness(0) invert(1); }
}

@media (max-width: 1100px) {
  .clients .section-intro h2 { white-space: normal; }
}

@media (max-width: 900px) {
  .nav-shell { grid-template-columns: 1fr auto; padding: 0 24px; }
  nav { display: none; }
  .hero, .method, .outcomes, .proof, .wechat { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding-top: 72px; gap: 56px; }
  .diagnosis { transform: none; }
  .question-grid { grid-template-columns: 1fr 1fr; grid-template-rows: 310px 230px 230px; }
  .question-lead { grid-column: span 2; grid-row: auto; }
  .outcome-title { position: static; }
  .wechat { gap: 52px; }
  .client-logo-grid { grid-template-columns: repeat(3, 1fr); }
  .client-logo-grid img { border-bottom: 1px solid var(--line); }
  .client-logo-grid img:nth-child(3n) { border-right: 0; }
  .client-results-board { grid-template-columns: 1fr; align-items: start; }
  .clients .section-intro h2 { white-space: normal; }
  .case-feature, .case-feature.reverse { grid-template-columns: 1fr; }
  .case-feature > .case-image-link { min-height: auto; aspect-ratio: 16 / 10; }
  .channel-gallery { grid-template-columns: 1fr; }
  .channel-gallery .channel-main { grid-column: auto; }
  .channel-gallery img { aspect-ratio: 16 / 9; }
}

@media (max-width: 620px) {
  .section-shell, footer { width: min(calc(100% - 32px), var(--max)); }
  .nav-shell { width: 100%; height: 64px; padding: 0 16px; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; overflow: hidden; }
  .brand { min-width: 0; }
  .brand img { width: 124px; max-width: 100%; }
  .nav-cta { padding: 9px 11px; font-size: 11.5px; white-space: nowrap; }
  .hero { min-width: 0; min-height: auto; padding: 44px 0 38px; gap: 28px; }
  .hero-copy, .hero-evidence { width: 100%; max-width: 100%; min-width: 0; overflow: hidden; }
  h1 { max-width: 100%; font-size: clamp(38px, 10.2vw, 46px); overflow-wrap: anywhere; line-break: strict; }
  .hero-position { font-size: 13px; }
  .hero-lede { max-width: 100%; overflow-wrap: anywhere; }
  .hero-stats { grid-template-columns: 1fr 1.35fr; }
  .hero-stats > div { padding: 15px 12px 15px 0; align-items: flex-start; flex-direction: column; gap: 6px; }
  .hero-stats > div + div { padding-left: 14px; }
  .hero-stats strong { font-size: 29px; }
  .hero-proof-board { min-height: 0; padding: 10px; grid-template-columns: 1fr; }
  .hero-logo-proof { min-height: 270px; padding: 16px; }
  .hero-result-proof { min-height: 210px; padding: 20px; display: flex; flex-direction: column; align-items: flex-start; }
  .hero-result-proof > span { margin-bottom: auto; }
  .hero-result-proof strong { margin-top: 28px; font-size: 48px; }
  .hero-result-proof b { margin-top: 12px; }
  .hero-evidence figcaption { align-items: flex-start; flex-direction: column; gap: 4px; }
  .mobile-break { display: block; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 14px; }
  .channel-support { padding-top: 56px; padding-bottom: 32px; }
  .channel-list { grid-template-columns: 1fr 1fr; }
  .channel-list article { min-height: 124px; padding: 18px 16px; grid-template-columns: 30px 1fr; gap: 12px; }
  .channel-list article > img { width: 25px; height: 25px; }
  .questions, .method, .outcomes, .proof, .wechat { padding-top: 96px; padding-bottom: 96px; }
  .clients, .case-stories, .channel-proof { padding-top: 96px; padding-bottom: 96px; }
  .clients { padding-bottom: 56px; }
  .case-stories { padding-top: 56px; padding-bottom: 48px; }
  .channel-proof { padding-top: 48px; padding-bottom: 48px; }
  .question-grid, .outcome-map { grid-template-columns: 1fr; grid-template-rows: none; }
  .question-lead { grid-column: auto; min-height: 330px; }
  .question-item { min-height: 220px; }
  .wechat { width: 100%; margin-bottom: 0; padding-left: 24px; padding-right: 24px; border-radius: 0; }
  .wechat-copy h2 { font-size: clamp(38px, 11vw, 46px); white-space: normal; }
  .wechat-card { grid-template-columns: 1fr; }
  .client-logo-grid { grid-template-columns: 1fr 1fr; }
  .client-logo-grid img { height: 96px; border-right: 1px solid var(--line); }
  .client-logo-grid img:nth-child(2n) { border-right: 0; }
  .client-results-board { min-height: 0; padding: 28px 22px; gap: 40px; }
  .client-results-metrics { grid-template-columns: 1fr; }
  .client-results-metrics > div, .client-results-metrics > div:first-child { padding: 22px 0; }
  .client-results-metrics > div + div { border-top: 1px solid #4b4541; border-left: 0; }
  .case-feature { padding: 10px; }
  .case-copy { min-height: 430px; }
  .case-copy h3 { margin-top: 56px; }
  .case-pair { grid-template-columns: 1fr; }
  .case-card > div { min-height: 176px; }
  .case-card h3 { white-space: normal; }
  .case-note { text-align: left; line-height: 1.5; }
  .wechat-qr { width: min(100%, 220px); margin: 0 auto; }
  footer { flex-wrap: wrap; }
  footer p { width: 100%; margin: 0; order: 3; }
  .floating-cta { display: none; }
  .diagnosis-head { align-items: flex-start; flex-direction: column; gap: 8px; }
  .diagnosis { width: calc(100% - 8px); max-width: calc(100vw - 40px); justify-self: start; }
  .diagnosis * { min-width: 0; }
  .diagnosis dl div { grid-template-columns: 82px minmax(0, 1fr); gap: 16px; }
  .diagnosis dd { overflow-wrap: anywhere; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .nav-cta, .button { transition: none; }
}