:root {
  color-scheme: light;
  --paper: #ffffff;
  --surface: #f5f5f3;
  --ink: #171816;
  --muted: #62645f;
  --line: rgba(23, 24, 22, .17);
  --page-x: clamp(20px, 4vw, 68px);
  --content: 1440px;
  --radius: 6px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body { min-width: 320px; margin: 0; overflow-x: hidden; background: var(--paper); color: var(--ink); font-family: "Geist Variable", "PingFang SC", sans-serif; }
img, video { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
figure, p, h1, h2, h3, dl, dd { margin: 0; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 30; padding: 10px 14px; background: var(--ink); color: var(--paper); font-size: 11px; transform: translateY(-160%); }
.skip-link:focus { transform: none; }
.case-nav { position: absolute; top: 0; left: 50%; z-index: 20; display: grid; grid-template-columns: 1fr auto 1fr; width: min(100%, calc(var(--content) + var(--page-x) * 2)); align-items: center; padding: 22px var(--page-x); font-size: 10px; font-weight: 600; letter-spacing: .12em; transform: translateX(-50%); }
.case-nav > :last-child { justify-self: end; }
.back-link { display: flex; align-items: center; gap: 10px; width: fit-content; }
.back-link span:first-child { font-size: 16px; transition: transform 220ms ease; }
.back-link:hover span:first-child, .back-link:focus-visible span:first-child { transform: translateX(-3px); }
.case-hero, .case-video, .outcome-strip, .board-story, .event-section, .case-footer { width: min(100%, calc(var(--content) + var(--page-x) * 2)); margin-right: auto; margin-left: auto; }
.case-hero { display: grid; grid-template-columns: minmax(300px, .9fr) minmax(420px, 1.1fr); gap: clamp(24px, 3.2vw, 56px); align-items: start; padding: clamp(72px, 8vw, 120px) var(--page-x) clamp(24px, 2.8vw, 40px); }
.hero-heading { grid-column: 1; }
.hero-heading p { margin-bottom: 10px; font-size: 12px; font-weight: 560; letter-spacing: .08em; }
.hero-heading h1 { font-size: clamp(54px, 7vw, 104px); font-weight: 650; letter-spacing: -.075em; line-height: .88; }
.hero-intro { grid-column: 2; max-width: 42rem; padding-top: clamp(12px, 2.4vw, 34px); }
.hero-lede { max-width: 23em; font-size: clamp(20px, 2vw, 30px); font-weight: 480; letter-spacing: -.035em; line-height: 1.42; text-wrap: pretty; }
.hero-meta { display: grid; gap: 13px; margin-top: clamp(28px, 3.5vw, 52px); }
.hero-meta > div { display: grid; grid-template-columns: 5.5em 1fr; gap: 18px; border-top: 1px solid var(--line); padding-top: 10px; font-size: 13px; line-height: 1.5; }
.hero-meta dt { color: var(--muted); }
.hero-meta dd { margin: 0; }
.hero-experience { grid-column: 1; width: 100%; margin-top: 0; }
.hero-experience > div { display: flex; justify-content: space-between; gap: 16px; align-items: baseline; margin-bottom: 12px; border-top: 1px solid var(--line); padding-top: 10px; font-size: 12px; }
.hero-experience > div span { color: var(--muted); }
.hero-experience img { aspect-ratio: 4 / 3; object-fit: cover; border-radius: var(--radius); }
.hero-left { display: grid; justify-items: start; gap: 0; }
.hero-title-img { width: clamp(240px, 24vw, 330px); height: auto; }
.hero-lede { max-width: 17em; margin-top: clamp(22px, 2.4vw, 36px); font-size: clamp(16px, 1.35vw, 20px); letter-spacing: .01em; line-height: 1.7; }
.hero-qr { display: grid; justify-items: center; gap: 10px; margin-top: clamp(30px, 3.4vw, 52px); }
.hero-qr .qr-logo { width: clamp(86px, 7.5vw, 108px); height: auto; justify-self: start; }
.hero-qr .qr-code { width: clamp(120px, 11vw, 150px); aspect-ratio: 1; object-fit: contain; }
.hero-qr .qr-caption { color: var(--muted); font-size: 12px; letter-spacing: .06em; }
.hero-visual { display: grid; align-items: center; min-width: 0; }
.hero-visual img { width: 100%; height: auto; object-fit: contain; }
.hero-video-frame { position: relative; overflow: hidden; border-radius: var(--radius); background: #d9d9d6; }
.hero-video-frame video { aspect-ratio: 16 / 9; object-fit: contain; background: #d9d9d6; }
.video-play { position: absolute; inset: 0; z-index: 2; margin: auto; width: clamp(84px, 9.5vw, 112px); aspect-ratio: 1; display: grid; place-items: center; border: 0; border-radius: 50%; background: #fff; color: #111; cursor: pointer; box-shadow: 0 10px 32px rgba(0, 0, 0, .22); transition: opacity .3s ease, transform .35s cubic-bezier(.16, 1, .3, 1); }
.video-play svg { width: 46%; height: 46%; margin-left: 7%; }
.video-play:hover { transform: scale(1.06); }
.hero-video-frame.is-playing .video-play { opacity: 0; transform: scale(.82); pointer-events: none; }
.outcome-strip { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: clamp(30px, 5vw, 80px); padding: clamp(26px, 3vw, 44px) var(--page-x) clamp(48px, 5.5vw, 84px); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--paper); }
.outcome-lead { grid-column: 1; grid-row: 1; }
.outcome-title-img { width: clamp(320px, 34vw, 480px); height: auto; }
.metric-cards { grid-column: 1 / -1; grid-row: 2; display: grid; grid-template-columns: repeat(5, 1fr); gap: clamp(12px, 1.2vw, 20px); margin-top: clamp(22px, 2.6vw, 38px); }
.metric-card { display: flex; flex-direction: column; justify-content: space-between; gap: 44px; min-height: clamp(180px, 16vw, 230px); padding: clamp(20px, 2.2vw, 30px); border-radius: var(--radius); background: #efeeec; }
.metric-card strong { font-size: clamp(34px, 3.4vw, 52px); font-weight: 400; letter-spacing: -.05em; line-height: 1; }
.metric-card.is-text strong { line-height: 1.2; }
.metric-card .metric-label { font-size: 13px; font-weight: 400; line-height: 1.55; }
.outcome-strip p { font-size: 12px; line-height: 1.55; }
.outcome-note { grid-column: 2; grid-row: 1; max-width: 24em; justify-self: end; align-self: end; font-size: 15px !important; line-height: 1.75 !important; color: var(--ink); }
.case-video { padding: 20px var(--page-x) 0; }
.board-story { padding: 0 var(--page-x) clamp(84px, 10vw, 148px); }
.board-panel { overflow: hidden; background: var(--paper); }
.board-panel img { height: auto; }
.event-section { padding: 0 var(--page-x) clamp(84px, 10vw, 148px); }
/* —— 现场模块：版式复刻首页个人经历（4 列错落 + 编号图注）—— */
.event-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 17px; border-bottom: 1px solid var(--line); }
.event-head p { font-size: 10px; font-weight: 560; letter-spacing: .16em; text-transform: uppercase; }
.event-head p:last-child { color: var(--muted); }
.event-grid { display: grid; grid-template-columns: 1.02fr 1fr 1.02fr 1fr; gap: clamp(12px, 1.1vw, 22px); align-items: start; margin-top: clamp(48px, 5.5vw, 88px); }
.event-card { min-width: 0; margin: 0; }
.event-card-media { position: relative; overflow: hidden; border-radius: var(--radius); background: #e3e3e3; }
.event-card.is-tall .event-card-media { aspect-ratio: 3 / 4; }
.event-card.is-wide .event-card-media { aspect-ratio: 4 / 3.08; }
.event-card.is-34 .event-card-media { aspect-ratio: 3 / 4; }
.event-card-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.event-card figcaption { display: grid; grid-template-columns: 42px minmax(0, 1fr) auto; gap: 10px; align-items: start; padding-top: 11px; }
.event-card figcaption span, .event-card figcaption time { color: var(--muted); font-size: 9px; font-variant-numeric: tabular-nums; letter-spacing: .08em; }
.event-card figcaption time { justify-self: end; }
.event-card h3 { font-size: 14px; font-weight: 570; letter-spacing: -.025em; }
.event-card figcaption p { margin-top: 3px; color: var(--muted); font-size: 12px; line-height: 1.4; }
.case-footer { display: flex; justify-content: space-between; padding: 30px var(--page-x) 46px; font-size: 10px; letter-spacing: .1em; }
.case-footer a { padding-bottom: 5px; border-bottom: 1px solid var(--ink); }
[data-reveal] { will-change: transform, opacity; }
@media (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    transition: opacity 420ms cubic-bezier(.22, 1, .36, 1), transform 420ms cubic-bezier(.22, 1, .36, 1);
  }
  [data-reveal].is-hidden {
    opacity: 0;
    transform: translateY(18px);
  }
}

@media (max-width: 760px) {
  .case-nav { grid-template-columns: 1fr auto; padding-top: 19px; }
  .case-nav > :nth-child(2) { display: none; }
  .case-hero { grid-template-columns: 1fr; gap: 16px; }
  .hero-heading, .hero-intro, .hero-experience { grid-column: 1; }
  .hero-intro { padding-top: 0; }
  .hero-lede { font-size: 21px; }
  .hero-meta { margin-top: 28px; }
  .hero-experience { width: 100%; margin-top: 0; }
  .hero-title-img { width: 210px; }
  .hero-lede { margin-top: 18px; font-size: 16px; }
  .hero-qr { margin-top: 26px; }
  .hero-qr .qr-code { width: 128px; }
  .outcome-strip { grid-template-columns: 1fr; gap: 34px; padding-top: 44px; padding-bottom: 56px; }
  .outcome-title-img { width: min(78vw, 380px); }
  .outcome-lead, .outcome-note { grid-column: 1; grid-row: auto; }
  .metric-cards { grid-row: auto; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 0; }
  .metric-card { min-height: 150px; gap: 30px; padding: 18px; }
  .metric-card strong { font-size: 30px; }
  .outcome-note { max-width: 36ch; justify-self: start; font-size: 14px !important; }
  .case-video { padding-top: 12px; }
  .board-story { padding-top: 28px; }
  .board-panel { overflow-x: auto; overscroll-behavior-inline: contain; scrollbar-width: thin; }
  .board-panel img { width: 900px; max-width: none; }
  .event-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .event-card.is-wide:not(:first-child) { margin-top: 46px; }
  .event-card.is-tall .event-card-media, .event-card.is-34 .event-card-media { aspect-ratio: 3 / 4.15; }
  .event-card.is-wide .event-card-media { aspect-ratio: 3 / 3.2; }
  .event-card.is-tall .event-card-media img, .event-card.is-34 .event-card-media img { object-position: center; }
  .event-card figcaption { grid-template-columns: 34px minmax(0, 1fr) auto; gap: 8px; }
  .event-card figcaption time { display: none; }
  .event-card h3 { font-size: 13px; }
  .event-card figcaption p { font-size: 11px; }
  .case-footer { flex-wrap: wrap; gap: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
}