:root {
  --ink: #151515;
  --muted: #6d6c69;
  --paper: #fbfbfa;
  --blue: #2d679b;
  --blue-deep: #173f65;
  --blue-soft: #eaf2f8;
  --gold: #d79f22;
  --gold-soft: #fff7df;
  --line: #dededb;
  --shell: min(1200px, calc(100vw - 64px));
  --radius: 18px;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  scroll-behavior: smooth;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 82px; }
body { margin: 0; background: var(--paper); color: var(--ink); line-height: 1.6; }
img, video { display: block; max-width: 100%; }
button, a { color: inherit; font: inherit; }
a { text-decoration: none; }
button { cursor: pointer; }
.shell { width: var(--shell); margin-inline: auto; }
.section-pad { padding-block: 92px; }
.skip-link { position: fixed; z-index: 999; left: 16px; top: -64px; padding: 10px 14px; background: #fff; border: 1px solid var(--ink); }
.skip-link:focus { top: 16px; }
.scroll-progress { position: fixed; z-index: 100; top: 0; inset-inline: 0; height: 3px; }
.scroll-progress span { display: block; height: 100%; transform: scaleX(0); transform-origin: left; background: var(--blue); }

.site-header { position: sticky; top: 0; z-index: 40; border-bottom: 1px solid rgba(21,21,21,.1); background: rgba(251,251,250,.88); backdrop-filter: blur(18px); }
.nav { height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark { display: grid; place-items: center; width: 34px; aspect-ratio: 1; border-radius: 50%; background: var(--ink); color: #fff; font-size: 12px; letter-spacing: .08em; }
.nav-links { display: flex; gap: 30px; margin-left: auto; }
.nav-links a { color: var(--muted); font-size: 14px; }
.nav-links a:hover, .nav-links a.is-active { color: var(--ink); }
.nav-contact { border: 0; border-bottom: 1px solid var(--ink); padding: 5px 0; background: transparent; font-weight: 700; }

.eyebrow { margin: 0 0 24px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .2em; }
.hero { min-height: calc(100vh - 72px); padding-block: 68px 32px; display: grid; grid-template-columns: minmax(0, 1.28fr) minmax(320px, .62fr); grid-template-rows: 1fr auto; gap: 48px 60px; align-items: center; }
.hero-copy { padding-left: clamp(0px, 2vw, 28px); }
.hero h1 { max-width: 900px; margin: 0; font-size: clamp(48px, 6.1vw, 88px); line-height: 1.06; letter-spacing: -.005em; }
.hero h1 span { color: var(--blue); }
.hero-intro { margin: 34px 0 8px; font-size: 20px; }
.job-intent { margin: 0; color: var(--muted); font-size: 16px; }
.job-intent span { margin-right: 14px; color: var(--blue-deep); font-size: 12px; font-weight: 800; letter-spacing: .1em; }
.hero-actions { display: flex; gap: 12px; margin-top: 34px; }
.button { min-width: 136px; padding: 13px 18px; border: 1px solid var(--ink); border-radius: 999px; text-align: center; font-weight: 700; transition: transform .2s, background .2s, color .2s; }
.button:hover { transform: translateY(-2px); }
.button.primary { background: var(--ink); color: #fff; }
.button.secondary { background: transparent; }
.hero-photo { position: relative; margin: 0; height: min(610px, 66vh); overflow: hidden; border-radius: 46% 46% 18px 18px; background: var(--blue-soft); }
.hero-photo::before { content: ""; position: absolute; inset: 16px; z-index: 1; border: 1px solid rgba(255,255,255,.7); border-radius: inherit; pointer-events: none; }
.hero-photo img { width: 100%; height: 100%; object-fit: cover; object-position: 54% center; transition: transform .8s cubic-bezier(.2,.7,.2,1); }
.hero-photo:hover img { transform: scale(1.025); }
.hero-photo figcaption { position: absolute; z-index: 2; left: 22px; right: 22px; bottom: 20px; display: flex; justify-content: space-between; padding: 12px 14px; border-radius: 12px; color: #fff; background: rgba(16,31,43,.58); backdrop-filter: blur(10px); font-size: 12px; }
.hero-facts { grid-column: 1 / -1; display: grid; grid-template-columns: 1.55fr .95fr .9fr; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.hero-fact { min-height: 92px; margin: 0; padding: 22px 28px; display: flex; flex-direction: column; justify-content: center; border-right: 1px solid var(--line); }
.hero-fact:last-child { border-right: 0; }
.hero-fact span { color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.hero-fact strong { margin-top: 6px; font-size: 17px; }

.section-heading { display: grid; grid-template-columns: .6fr 1.4fr; align-items: end; margin-bottom: 38px; }
.section-heading .eyebrow { margin: 0; }
.section-heading h2 { margin: 0; max-width: 720px; font-size: clamp(38px, 5vw, 66px); line-height: 1.08; letter-spacing: -.05em; }
.project-index-list { border-top: 1px solid var(--ink); }
.project-index-item { display: grid; grid-template-columns: 64px 1fr 1.25fr auto; gap: 32px; align-items: center; min-height: 190px; padding: 30px 0; border-bottom: 1px solid var(--line); transition: padding .25s, background .25s; }
.project-index-item:hover { padding-inline: 22px; background: var(--blue-soft); }
.project-index-item.query:hover { background: var(--gold-soft); }
.project-number { align-self: start; color: var(--blue); font: 800 12px/1 system-ui; letter-spacing: .12em; }
.project-type { margin: 0 0 4px; color: var(--muted); font-size: 12px; }
.project-index-item h3 { margin: 0; font-size: clamp(34px, 4vw, 52px); letter-spacing: -.04em; line-height: 1; }
.project-index-item p { margin: 10px 0 0; }
.project-role { display: flex; flex-direction: column; gap: 8px; color: var(--muted); }
.project-role strong { color: var(--ink); font-size: 17px; }
.project-arrow { align-self: end; color: var(--blue); font-weight: 700; white-space: nowrap; }

.case { padding-block: 96px 32px; border-top: 1px solid var(--line); }
.case-querypilot { margin-top: 80px; background: linear-gradient(180deg, #fffdf7, var(--paper) 28%); }
.case-hero { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: end; padding-bottom: 40px; border-bottom: 1px solid var(--ink); }
.case-hero h2 { margin: 0; font-size: clamp(66px, 10vw, 128px); line-height: .83; letter-spacing: -.07em; }
.case-name { margin: 26px 0 0; color: var(--muted); font-size: 24px; }
.case-role { display: flex; flex-direction: column; gap: 4px; min-width: 230px; padding-bottom: 6px; }
.case-role span { color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .13em; }
.case-role strong { font-size: 18px; }
.case-role small { color: var(--muted); }
.case-part { padding-block: 64px; border-bottom: 1px solid var(--line); }
.case-flow + .case-evidence { padding-top: 0; border-top: 0; }
.case-flow + .case-evidence .media-story:first-child { border-top: 0; }
.part-label { display: flex; align-items: center; gap: 14px; color: var(--blue-deep); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
.part-label span { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid #afc7da; border-radius: 50%; }
.case-problem { display: grid; grid-template-columns: .55fr 1.45fr; gap: 48px; }
.problem-statement { margin: 0; max-width: 850px; font-size: clamp(25px, 3vw, 40px); line-height: 1.55; letter-spacing: -.025em; }
.case-work { display: block; }
.case-work .part-label { margin-bottom: 24px; }
.case-work .work-list { margin-left: 0; width: 100%; }
.work-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); }
.work-list li { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 24px; align-items: center; min-height: 94px; border-bottom: 1px solid var(--line); }
.work-list li span { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.work-list li p { margin: 0; font-size: 20px; }
.case-flow > .part-label { margin-bottom: 46px; }
.process-diagram { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #f4f7f9; scrollbar-color: #b6c8d5 transparent; }
.process-diagram svg { display: block; width: 100%; min-width: 860px; height: auto; font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif; }
.process-diagram .diagram-edges path { fill: none; stroke: #7898ad; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.process-diagram .diagram-edges marker path { fill: var(--blue); stroke: none; }
.process-diagram .diagram-edges .loop-edge { stroke: var(--blue); stroke-dasharray: 7 7; }
.process-diagram .diagram-node rect { fill: #fff; stroke: #adc2d0; stroke-width: 1.5; }
.process-diagram .diagram-node text { fill: var(--ink); font-size: 20px; font-weight: 700; text-anchor: middle; dominant-baseline: middle; }
.process-diagram .diagram-node .node-kicker { fill: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.process-diagram .node-main rect, .process-diagram .node-retrieval rect { stroke: var(--blue); stroke-width: 2; }
.process-diagram .node-check rect { fill: #e7f0f6; stroke: var(--blue); }
.process-diagram .node-output rect { fill: #fff; stroke: #91aebf; }
.process-diagram .node-state rect { fill: var(--blue-deep); stroke: var(--blue-deep); }
.process-diagram .node-state text { fill: #fff; }
.process-diagram .node-state .node-kicker { fill: #bcd6e8; }
.process-diagram .edge-label, .process-diagram .edge-notes text, .process-diagram .end-label { fill: var(--blue); font-size: 16px; font-weight: 700; letter-spacing: .02em; text-anchor: middle; paint-order: stroke; stroke: #fff; stroke-width: 6px; stroke-linejoin: round; }
.process-diagram .node-clarify rect { fill: #fff8e8; stroke: #d9b45a; }
.process-diagram .node-clarify .node-kicker { fill: #a97910; }
.process-diagram .diagram-start circle { fill: var(--blue-deep); }
.process-diagram .diagram-end circle:first-child { fill: none; stroke: var(--blue-deep); stroke-width: 2; }
.process-diagram .diagram-end circle:last-child { fill: var(--blue-deep); }
.querypilot-diagram { background: #fffaf0; }
.querypilot-diagram .diagram-edges path { stroke: #a78b50; }
.querypilot-diagram .diagram-edges marker path { fill: var(--gold); }
.evidence-head { display: grid; grid-template-columns: .55fr 1.45fr; gap: 48px; align-items: start; margin-bottom: 38px; }
.evidence-head > p { margin: 0; color: var(--muted); }
.metric-strip { display: grid; grid-template-columns: repeat(6, 1fr); border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.metric-strip p { min-height: 122px; margin: 0; padding: 24px 16px; display: flex; flex-direction: column; justify-content: center; border-right: 1px solid var(--line); }
.metric-strip p:last-child { border-right: 0; }
.metric-strip strong { color: var(--blue); font-size: clamp(23px, 2.3vw, 36px); line-height: 1; letter-spacing: -.03em; }
.metric-strip span { margin-top: 10px; color: var(--muted); font-size: 12px; }
.query-metrics { grid-template-columns: repeat(3, 1fr); }
.query-metrics strong { color: var(--gold); }
.media-stories { margin-top: 110px; }
.media-story { margin: 0; padding-block: 56px; display: grid; grid-template-columns: minmax(270px,.72fr) minmax(0,1.28fr); gap: 52px; align-items: center; border-top: 1px solid var(--line); }
.media-story.reverse { grid-template-columns: minmax(0,1.28fr) minmax(270px,.72fr); }
.media-story.reverse .media-copy { order: 2; }
.media-copy span { color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .14em; }
.media-copy h3 { margin: 15px 0 16px; font-size: clamp(28px, 3.2vw, 44px); line-height: 1.2; letter-spacing: -.04em; }
.media-copy p { margin: 0; color: var(--muted); font-size: 17px; }
.media-frame { width: 100%; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 24px 70px rgba(27,52,70,.1); }
.media-frame video, .media-frame img { width: 100%; height: auto; }
.media-frame video { aspect-ratio: 16 / 9; object-fit: cover; background: #eef2f4; }
.media-frame.image-button { padding: 0; border: 1px solid var(--line); text-align: left; }
.media-frame.image-button img { transition: transform .45s cubic-bezier(.2,.7,.2,1); }
.media-frame.image-button:hover img { transform: scale(1.012); }
.media-frame.portrait { justify-self: center; max-width: 560px; max-height: 650px; }
.media-frame.portrait img { max-height: 650px; object-fit: contain; }

.closing { padding-block: 104px; border-top: 1px solid var(--line); background: linear-gradient(120deg, #edf5fa 0%, var(--paper) 48%); }
.closing-layout { position: relative; min-height: 600px; display: grid; grid-template-columns: 1.55fr .45fr; gap: 56px; align-items: end; }
.closing-copy { align-self: start; padding-top: 26px; }
.closing-copy h2 { margin: 0; max-width: none; font-size: clamp(48px, 6vw, 82px); line-height: 1.03; letter-spacing: .08em; }
.closing-copy h2 span { color: var(--blue); }
.closing-lines { max-width: 690px; margin-top: 42px; border-top: 1px solid var(--ink); }
.closing-lines p { margin: 0; padding: 24px 0; border-bottom: 1px solid var(--line); font-size: 17px; color: #4e4e4b; }
.ip-accent { width: 100%; max-height: 560px; object-fit: contain; object-position: bottom; filter: drop-shadow(0 24px 30px rgba(35,65,83,.08)); }
.site-footer { padding-block: 32px; background: var(--ink); color: #fff; font-size: 13px; }
.site-footer .shell { display: flex; justify-content: space-between; gap: 24px; }
.site-footer p { margin: 0; color: #c9c9c6; }
.site-footer div { display: flex; gap: 20px; }

.contact-dialog, .lightbox { border: 0; padding: 0; background: #fff; box-shadow: 0 30px 120px rgba(0,0,0,.25); }
.contact-dialog { width: min(560px, calc(100vw - 32px)); padding: 42px; border-radius: 18px; }
.contact-dialog::backdrop, .lightbox::backdrop { background: rgba(13,24,32,.62); backdrop-filter: blur(7px); }
.dialog-close, .lightbox > button { position: absolute; top: 16px; right: 16px; width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 50%; background: #fff; font-size: 20px; }
.contact-dialog h2 { margin: 0 0 28px; font-size: 44px; }
.contact-detail { display: grid; grid-template-columns: 60px 1fr auto; gap: 12px; align-items: center; min-height: 68px; border-top: 1px solid var(--line); }
.contact-detail span { color: var(--muted); font-size: 12px; }
.contact-detail button { border: 0; border-bottom: 1px solid var(--ink); background: transparent; font-weight: 700; }
.copy-status { min-height: 24px; margin: 18px 0 0; color: var(--blue); }
.lightbox { width: min(1200px, calc(100vw - 40px)); max-height: calc(100vh - 40px); border-radius: 14px; }
.lightbox img { width: 100%; max-height: calc(100vh - 40px); object-fit: contain; }

.motion-ready [data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .65s ease, transform .65s ease; }
.motion-ready [data-reveal].is-visible { opacity: 1; transform: none; }
.qa-mode [data-reveal] { opacity: 1 !important; transform: none !important; }

@media (max-width: 1200px) and (min-width: 721px) {
  .case-work { display: block; }
  .case-work .part-label { margin-bottom: 20px; }
  .case-work .work-list { margin-left: 0; width: 100%; min-width: 0; }
  .work-list li { grid-template-columns: max-content minmax(0, 1fr); gap: 16px; }
  .work-list li p { min-width: 0; overflow-wrap: anywhere; }
  .process-diagram svg { min-width: 0; width: 100%; }
}

@media (max-width: 960px) {
  :root { --shell: min(100% - 40px, 760px); }
  .hero { grid-template-columns: 1fr .78fr; gap: 36px; padding-top: 48px; }
  .hero h1 { font-size: clamp(44px, 7.5vw, 64px); }
  .hero-photo { height: 470px; }
  .hero-facts { grid-template-columns: 1fr; }
  .hero-fact { min-height: 72px; border-right: 0; border-bottom: 1px solid var(--line); }
  .hero-fact:last-child { border-bottom: 0; }
  .project-index-item { grid-template-columns: 48px 1fr; }
  .project-role, .project-arrow { grid-column: 2; }
  .case-hero h2 { font-size: 86px; }
  .case-problem, .case-work, .evidence-head { grid-template-columns: 1fr; }
  .metric-strip { grid-template-columns: repeat(3, 1fr); }
  .metric-strip p:nth-child(3) { border-right: 0; }
  .media-story, .media-story.reverse { grid-template-columns: 1fr; gap: 34px; }
  .media-story.reverse .media-copy { order: 0; }
  .closing-layout { grid-template-columns: 1fr .55fr; align-items: end; }
  .closing-copy { grid-column: 1 / -1; }
}

@media (max-width: 680px) {
  :root { --shell: calc(100vw - 32px); }
  html { scroll-padding-top: 66px; }
  .site-header { height: 64px; }
  .nav { height: 64px; }
  .nav-links { display: none; }
  .brand { font-size: 14px; }
  .hero { min-height: auto; padding-block: 44px 24px; grid-template-columns: 1fr; gap: 34px; }
  .hero-copy { padding-left: 0; }
  .hero h1 { font-size: clamp(46px, 13.2vw, 62px); }
  .hero-intro { font-size: 17px; }
  .job-intent { line-height: 1.9; }
  .job-intent span { display: block; }
  .hero-photo { height: 430px; border-radius: 40% 40% 16px 16px; }
  .hero-facts { grid-column: auto; }
  .hero-fact { padding-inline: 18px; }
  .hero-actions { flex-wrap: wrap; }
  .button { flex: 1 1 140px; }
  .section-pad { padding-block: 88px; }
  .section-heading { grid-template-columns: 1fr; gap: 16px; }
  .section-heading h2 { font-size: 42px; }
  .project-index-item { min-height: 220px; grid-template-columns: 38px 1fr; gap: 18px; }
  .project-index-item:hover { padding-inline: 10px; }
  .case { padding-top: 92px; }
  .case-hero { grid-template-columns: 1fr; gap: 30px; }
  .case-hero h2 { font-size: clamp(64px, 20vw, 86px); }
  .case-name { font-size: 20px; }
  .case-part { padding-block: 64px; }
  .problem-statement { font-size: 26px; }
  .work-list li { grid-template-columns: 66px 1fr; }
  .work-list li p { font-size: 17px; }
  .process-diagram svg { min-width: 780px; }
  .metric-strip, .query-metrics { grid-template-columns: repeat(2, 1fr); }
  .metric-strip p:nth-child(3) { border-right: 1px solid var(--line); }
  .metric-strip p:nth-child(even) { border-right: 0; }
  .query-metrics p:last-child { grid-column: 1 / -1; border-right: 0; }
  .media-stories { margin-top: 70px; }
  .media-story { padding-block: 52px; }
  .media-copy h3 { font-size: 32px; }
  .closing { padding-block: 88px; }
  .closing-layout { min-height: auto; grid-template-columns: 1fr; gap: 30px; }
  .closing-copy { grid-column: auto; }
  .closing-copy h2 { font-size: 48px; }
  .ip-accent { max-width: 260px; justify-self: center; }
  .site-footer .shell, .site-footer div { flex-direction: column; }
  .contact-dialog { padding: 32px 22px; }
  .contact-detail { grid-template-columns: 1fr auto; padding-block: 14px; }
  .contact-detail span { grid-column: 1 / -1; }
  .contact-detail strong { overflow-wrap: anywhere; }
}

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

/* Restored editorial hierarchy */
.identity-line { display:flex; gap:18px; align-items:baseline; margin:0 0 8px; font-size:20px; }
.identity-line strong { font-size:28px; }
.identity-line span,.education-line { color:var(--muted); }
.education-line { margin:0 0 34px; font-size:18px; }
.job-intent { display:flex; gap:14px; align-items:center; flex-wrap:nowrap; white-space:nowrap; }
.job-intent span { color:var(--blue); font-weight:700; }
.job-intent i { color:var(--muted); font-style:normal; }
.hero-fact:nth-child(2) { white-space:nowrap; }
.hero-copy { display:flex; flex-direction:column; align-items:flex-start; }
.hero-copy #hero-title { order:1; max-width:760px; letter-spacing:.08em !important; line-height:1.06; margin-bottom:38px; }
.hero-copy .identity-line { order:2; }
.hero-copy .education-line { order:3; }
.hero-copy .job-intent { order:4; }
.hero-copy .hero-actions { order:5; }
.ability-grid { display:flex; flex-wrap:wrap; border-top:1px solid var(--line); border-bottom:1px solid var(--line); margin:34px 0 72px; }
.ability-grid article { display:contents; }
.ability-card > button { order:1; flex:0 0 25%; min-height:190px; padding:28px 30px; border:0; border-right:1px solid var(--line); background:none; text-align:left; color:inherit; cursor:pointer; }
.ability-card > button[aria-expanded="true"] { border-top:4px solid var(--blue); padding-top:24px; background:var(--blue-soft); }
.ability-card > button[aria-expanded="true"]::after { content:"↘"; float:right; color:var(--blue); transform:rotate(-90deg); }
.ability-card > button:focus-visible { outline:2px solid var(--blue); outline-offset:6px; }
.ability-evidence { order:2; flex:0 0 100%; margin:0; padding:24px 30px 28px; border-top:1px solid var(--line); background:var(--blue-soft); display:grid; grid-template-columns:1fr 1fr; gap:28px; }
.ability-evidence[hidden] { display:none; }
.ability-evidence:not([hidden]) { animation: ability-open .28s ease-out both; }
.ability-evidence div { font-size:14px; line-height:1.5; }
.ability-evidence strong { color:var(--ink); }
.ability-evidence p { margin:5px 0; font-size:14px; }
.ability-evidence a { color:var(--blue); font-weight:700; font-size:13px; }
.case-work, .case-flow, .case-evidence { scroll-margin-top:90px; }
.evidence-focus { background: rgba(54,104,153,.10); }
.work-list li.evidence-focus { border-left:4px solid var(--blue); padding-left:18px; }
.process-diagram.evidence-focus { outline:3px solid rgba(54,104,153,.45); outline-offset:8px; }
.ability-grid article:last-child > button { border-right:0; }
.ability-grid span { color:var(--blue); font-weight:700; letter-spacing:.08em; }
.ability-grid h3 { margin:24px 0 12px; font-size:23px; }
.ability-grid p { margin:0; color:var(--muted); line-height:1.65; }
.case-hero { position:relative; }
.case-index { position:absolute; right:30px; top:-26px; z-index:0; color:#eef2f6; font-size:clamp(180px,24vw,330px); line-height:.8; font-weight:800; letter-spacing:-.1em; }
.case-hero > div { position:relative; z-index:1; }
.case-problem { grid-template-columns:1fr 1fr; gap:72px; align-items:start; border-bottom:1px solid var(--line); }
.summary-business,.summary-result { font-size:clamp(18px,2vw,27px); line-height:1.6; }
.summary-result { color:var(--muted); }
.summary-business strong,.summary-result strong { color:var(--blue); }
.closing-lines p strong { display:inline-block; margin-bottom:8px; color:var(--ink); font-size:20px; }
.closing-contact { margin-top:24px; border:0; border-bottom:1px solid var(--ink); background:transparent; padding:8px 0; font-weight:700; font-size:18px; }
.ip-accent { animation: ip-float 5s ease-in-out infinite; transform-origin:50% 90%; }
@keyframes ip-float { 0%,100% { transform:translateY(0) rotate(0deg); } 50% { transform:translateY(-8px) rotate(-1deg); } }
@keyframes ability-open { from { opacity:0; transform:translateY(-8px); } to { opacity:1; transform:translateY(0); } }

/* 四档字号：展示、区块标题、正文、辅助；层次主要靠字重与颜色区分 */
:root { --fs-display:clamp(52px, 6vw, 80px); --fs-section:clamp(30px, 3.5vw, 44px); --fs-body:18px; --fs-small:14px; }
.hero h1, .closing-copy h2, .case-hero h2 { font-size:var(--fs-display); }
.section-heading h2, .project-index-item h3, .media-copy h3, .contact-dialog h2 { font-size:var(--fs-section); }
.ability-grid h3 { font-size:24px; letter-spacing:-.02em; }
.project-index > .section-heading { margin-left:0; text-align:left; }
.project-index > .section-heading h2 { justify-self:end; text-align:right; }
.hero-intro, .problem-statement, .work-list li p, .media-copy p, .closing-lines p, .summary-business, .summary-result { font-size:var(--fs-body); }
.eyebrow, .project-type, .case-role span, .work-list li span, .media-copy span, .hero-fact span, .ability-evidence a, .ability-evidence div, .ability-evidence p, .site-footer { font-size:var(--fs-small); }
@media (max-width: 720px) {
  .identity-line { flex-wrap:wrap; gap:8px 14px; }
  .job-intent { white-space:normal; flex-wrap:wrap; }
  .case-problem { grid-template-columns:1fr; gap:20px; }
  /* 移动端取消桌面版工作列表的外扩，避免内容被视口裁切 */
  .case-work { grid-template-columns:1fr; gap:20px; min-width:0; }
  .case-work .work-list { margin-left:0; width:100%; min-width:0; }
  .work-list { min-width:0; }
  .work-list li { display:block; min-width:0; padding:18px 0; }
  .work-list li span { display:block; margin-bottom:6px; }
  .work-list li p { min-width:0; overflow-wrap:anywhere; }
  .case-index { right:8px; font-size:150px; }
  .ability-card > button { flex-basis:50%; }
  .ability-evidence { grid-template-columns:1fr; }
  .process-diagram { overflow-x: hidden; }
  .process-diagram svg { min-width: 0; width: 100%; height: auto; }
}