:root {
  --paper: #f5f4f0;
  --ink: #171717;
  --muted: #6e6e68;
  --line: #d7d5ce;
  --accent: #8f5fae;
  --night: #0a1724;
  --cream: #f4ead6;
  --max: 1440px;
  /* 版式锁定基准：视口 >=1280px 时等同于 100vw（大屏表现不变），
     视口 <1280px 时固定在 1280px，页面改为横向滑动而不是压缩排版 */
  --vw: max(100vw, 1280px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, video { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button, summary { font: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  min-height: 72px;
  padding: 0 calc(var(--vw) * 0.035);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid rgba(23,23,23,.14);
  background: rgba(245,244,240,.88);
  backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 650; width: fit-content; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--ink); color: white; font-size: 12px; letter-spacing: .03em; }
.desktop-nav { display: flex; gap: 32px; font-size: 14px; }
.desktop-nav a, .header-cta { transition: color .2s ease; }
.desktop-nav a:hover, .header-cta:hover { color: var(--accent); }
.header-cta { justify-self: end; font-size: 14px; }

.hero, .work-index, .next-work { max-width: var(--max); margin: 0 auto; padding-left: calc(var(--vw) * 0.04); padding-right: calc(var(--vw) * 0.04); }
.hero { padding-top: clamp(64px, calc(var(--vw) * 0.09), 132px); padding-bottom: 72px; }
.hero-kicker { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 5px rgba(143,95,174,.13); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(280px, .72fr); gap: calc(var(--vw) * 0.08); align-items: end; margin-top: 38px; }
.eyebrow { margin: 0 0 16px; color: var(--muted); font-size: 12px; letter-spacing: .14em; }
.hero h1 { margin: 0; max-width: 960px; font-size: clamp(48px, calc(var(--vw) * 0.075), 112px); line-height: .98; letter-spacing: -.065em; font-weight: 620; }
.hero-intro { padding-bottom: .65em; }
.hero-intro p { margin: 0; color: #3d3d3a; font-size: clamp(16px, calc(var(--vw) * 0.0135), 20px); line-height: 1.75; }
.hero-intro p + p { margin-top: 20px; }
.role-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 64px; }
.role-tabs a { padding: 9px 15px; border: 1px solid var(--ink); border-radius: 999px; font-size: 14px; transition: .2s ease; }
.role-tabs a:hover { background: var(--ink); color: white; transform: translateY(-2px); }
.hero-metrics { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 72px; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); }
.hero-metrics article { min-height: 150px; padding: 26px 20px 24px 0; display: flex; flex-direction: column; justify-content: space-between; border-right: 1px solid var(--line); }
.hero-metrics article:not(:first-child) { padding-left: 24px; }
.hero-metrics article:last-child { border-right: 0; }
.hero-metrics strong { font-family: Georgia, "Times New Roman", serif; font-size: clamp(42px, calc(var(--vw) * 0.05), 72px); line-height: 1; font-weight: 400; letter-spacing: -.04em; }
.hero-metrics span { color: var(--muted); font-size: 14px; }

.work-index { padding-top: 100px; }
.section-heading { display: grid; grid-template-columns: 1fr 2fr; gap: calc(var(--vw) * 0.04); align-items: start; margin-bottom: 42px; }
.section-heading > span, .creative-heading span { font-size: 12px; letter-spacing: .14em; }
.section-heading h2, .creative-heading h2 { margin: 0; font-size: clamp(32px, calc(var(--vw) * 0.044), 64px); line-height: 1.12; letter-spacing: -.045em; font-weight: 560; }
.case-banner { position: relative; overflow: hidden; border-radius: 18px; background: var(--night); }
.case-banner img { aspect-ratio: 4.7 / 1; object-fit: cover; }
.case-banner-label { position: absolute; inset: auto 18px 18px; display: flex; justify-content: space-between; color: white; font-size: 11px; letter-spacing: .12em; text-shadow: 0 1px 12px #000; }
.case-intro { display: grid; grid-template-columns: 1fr 1.25fr; gap: calc(var(--vw) * 0.08); padding: 100px 0; border-bottom: 1px solid var(--line); }
.case-title h2 { margin: 0; font-size: clamp(44px, calc(var(--vw) * 0.06), 84px); line-height: 1.02; letter-spacing: -.06em; font-weight: 600; }
.case-description .lead { margin: 0; max-width: 700px; font-size: clamp(21px, calc(var(--vw) * 0.021), 31px); line-height: 1.55; letter-spacing: -.02em; }
.project-facts { margin: 54px 0 0; }
.project-facts div { display: grid; grid-template-columns: 110px 1fr; gap: 22px; padding: 13px 0; border-top: 1px solid var(--line); }
.project-facts dt { color: var(--muted); font-size: 14px; }
.project-facts dd { margin: 0; font-size: 14px; }
.challenge { display: grid; grid-template-columns: 1.35fr 1fr; gap: calc(var(--vw) * 0.08); padding: 120px 0; }
.section-number { color: var(--accent); font-family: Georgia, serif; font-size: 18px; }
.challenge h3, .results h3 { margin: 20px 0 0; font-size: clamp(34px, calc(var(--vw) * 0.043), 62px); line-height: 1.13; letter-spacing: -.04em; font-weight: 560; }
.challenge > p { margin: 50px 0 0; font-size: 18px; line-height: 1.9; color: #474742; }

.operation-system { margin-left: calc(50% - calc(var(--vw) * 0.5)); margin-right: calc(50% - calc(var(--vw) * 0.5)); padding: 110px max(calc(var(--vw) * 0.04), calc((calc(var(--vw) * 1) - var(--max)) / 2 + calc(var(--vw) * 0.04))); color: white; background: var(--ink); }
.section-heading.inverse > span { color: #999; }
.operation-steps { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 72px; border-top: 1px solid #555; }
.operation-steps article { min-height: 310px; padding: 26px 28px 20px 0; border-right: 1px solid #444; }
.operation-steps article:not(:first-child) { padding-left: 26px; }
.operation-steps article:last-child { border-right: 0; }
.operation-steps span { color: var(--accent); font-family: Georgia, serif; }
.operation-steps h3 { margin: 82px 0 12px; font-size: 22px; }
.operation-steps p { margin: 0; color: #aaa; font-size: 14px; line-height: 1.8; }

.results { padding: 120px 0; }
.results-copy { display: grid; grid-template-columns: 80px 1.1fr 1fr; gap: 32px; align-items: start; }
.results-copy h3 { margin: 0; }
.results-copy > p { margin: 10px 0 0; color: var(--muted); font-size: 17px; line-height: 1.85; }
.result-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); margin-top: 80px; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); }
.result-grid article { min-height: 240px; padding: 28px 18px 24px 24px; display: flex; flex-direction: column; border-right: 1px solid var(--line); }
.result-grid article:first-child { padding-left: 0; }
.result-grid article:last-child { border-right: 0; }
.result-grid strong { font-family: Georgia, serif; font-size: clamp(52px, calc(var(--vw) * 0.06), 90px); line-height: 1; font-weight: 400; letter-spacing: -.05em; }
.result-grid span { margin-top: auto; font-size: 18px; font-weight: 600; }
.result-grid small { color: var(--muted); font-size: 13px; }
.result-primary strong { color: var(--accent); }
.data-detail { margin-top: 36px; border-bottom: 1px solid var(--line); }
.data-detail summary { padding: 18px 0; display: flex; justify-content: space-between; cursor: pointer; list-style: none; font-size: 15px; }
.data-detail summary::-webkit-details-marker { display: none; }
.data-detail[open] summary span { transform: rotate(45deg); }
.data-detail summary span { transition: transform .2s ease; }
.data-detail img { margin: 24px 0 56px; border: 1px solid var(--line); border-radius: 12px; }

.creative-system { margin-left: calc(50% - calc(var(--vw) * 0.5)); margin-right: calc(50% - calc(var(--vw) * 0.5)); padding: 110px max(calc(var(--vw) * 0.04), calc((calc(var(--vw) * 1) - var(--max)) / 2 + calc(var(--vw) * 0.04))); background: #e9e5dd; }
.creative-heading { display: grid; grid-template-columns: 1.4fr .7fr; gap: calc(var(--vw) * 0.07); align-items: end; margin-bottom: 58px; }
.creative-heading p { margin: 0 0 4px; color: var(--muted); font-size: 17px; line-height: 1.85; }
.creative-heading h2 { margin-top: 14px; }
.poster-layout { display: grid; grid-template-columns: 1.55fr .75fr .75fr; gap: 18px; align-items: end; }
.poster-layout figure { margin: 0; }
.poster-layout img { object-fit: cover; border-radius: 10px; box-shadow: 0 18px 40px rgba(0,0,0,.11); }
.poster-main img { aspect-ratio: 3 / 4; }
.poster-side img { aspect-ratio: 3 / 4; }
.poster-layout figcaption { padding: 12px 2px 0; display: flex; justify-content: space-between; color: var(--muted); font-size: 11px; letter-spacing: .05em; }
.countdown-block { display: grid; grid-template-columns: .7fr 1.6fr; gap: calc(var(--vw) * 0.08); margin-top: 120px; align-items: center; }
.countdown-copy > span { font-size: 12px; letter-spacing: .13em; }
.countdown-copy h3 { margin: 18px 0 16px; font-family: Georgia, serif; font-size: clamp(40px, calc(var(--vw) * 0.05), 70px); line-height: 1; font-weight: 400; }
.countdown-copy p { color: var(--muted); line-height: 1.85; }
.countdown-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; align-items: center; }
.countdown-gallery img { border-radius: 8px; box-shadow: 0 15px 35px rgba(0,0,0,.1); }
.countdown-gallery img:nth-child(2) { transform: translateY(34px); }

.video-system { margin-left: calc(50% - calc(var(--vw) * 0.5)); margin-right: calc(50% - calc(var(--vw) * 0.5)); padding: 110px max(calc(var(--vw) * 0.04), calc((calc(var(--vw) * 1) - var(--max)) / 2 + calc(var(--vw) * 0.04))); color: white; background: var(--night); }
.video-grid { display: grid; grid-template-columns: 1.7fr .75fr .75fr; gap: 18px; align-items: start; }
.video-grid article { overflow: hidden; border: 1px solid rgba(255,255,255,.16); border-radius: 12px; background: #111f2c; }
.video-grid video { aspect-ratio: 3 / 4; object-fit: cover; background: #05090d; }
.video-feature { display: grid; grid-template-columns: 1fr .8fr; }
.video-feature video { height: 100%; }
.video-feature > div, .video-card > div { padding: 24px; }
.video-feature span, .video-card span { color: #95a1ab; font-size: 11px; letter-spacing: .13em; }
.video-feature h3 { margin: auto 0 16px; font-size: clamp(28px, calc(var(--vw) * 0.03), 44px); }
.video-feature > div { display: flex; flex-direction: column; }
.video-feature p { margin: 0; color: #aeb7bf; font-size: 14px; line-height: 1.8; }
.video-card h3 { margin: 6px 0 0; font-size: 19px; }
.production-count { display: grid; grid-template-columns: 1fr 1fr 2fr; gap: 36px; align-items: end; margin-top: 70px; padding-top: 34px; border-top: 1px solid #40505f; }
.production-count div { display: flex; align-items: baseline; gap: 12px; }
.production-count strong { font-family: Georgia, serif; font-size: 64px; font-weight: 400; color: var(--cream); }
.production-count span, .production-count p { color: #aeb7bf; }
.production-count p { margin: 0; line-height: 1.8; }

.creator-showcase { padding: 120px 0; }
.creator-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.creator-card { min-height: 390px; padding: 26px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 12px; background: rgba(255,255,255,.38); transition: transform .25s ease, border-color .25s ease; }
.creator-card:hover { transform: translateY(-6px); border-color: var(--ink); }
.creator-rank { font-family: Georgia, serif; color: var(--accent); }
.creator-card h3 { margin: 58px 0 0; font-size: 28px; }
.creator-card > p { margin: 4px 0 26px; color: var(--muted); }
.creator-card dl { display: grid; grid-template-columns: 1fr 1fr; margin: 0; border-top: 1px solid var(--line); }
.creator-card dl div { padding-top: 14px; }
.creator-card dt { color: var(--muted); font-size: 12px; }
.creator-card dd { margin: 2px 0 0; font-size: 22px; }
.creator-links { display: flex; flex-direction: column; gap: 8px; margin-top: auto; padding-top: 28px; }
.creator-links a { padding: 10px 0; border-top: 1px solid var(--line); font-size: 14px; }
.creator-links a:hover { color: var(--accent); }
.reflection { padding: 80px 0 130px; border-top: 1px solid var(--ink); }
.reflection > span { font-size: 12px; letter-spacing: .13em; }
.reflection blockquote { max-width: 1050px; margin: 40px 0 0 auto; font-family: Georgia, "Songti SC", serif; font-size: clamp(30px, calc(var(--vw) * 0.042), 59px); line-height: 1.4; letter-spacing: -.025em; }
.next-work { padding-top: 120px; padding-bottom: 130px; border-top: 1px solid var(--line); }
.next-work > span { color: var(--accent); font-family: Georgia, serif; }
.next-work h2 { margin: 25px 0; font-size: clamp(44px, calc(var(--vw) * 0.06), 86px); line-height: 1.07; letter-spacing: -.055em; font-weight: 560; }
.next-work p { max-width: 640px; color: var(--muted); font-size: 17px; }
footer { padding: 100px calc(var(--vw) * 0.04) 40px; display: flex; justify-content: space-between; align-items: end; color: white; background: var(--ink); }
footer span { color: #999; font-size: 12px; letter-spacing: .12em; }
footer h2 { margin: 24px 0 0; font-size: clamp(34px, calc(var(--vw) * 0.045), 66px); line-height: 1.12; letter-spacing: -.04em; font-weight: 500; }
footer > a { color: #aaa; font-size: 14px; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .role-tabs a, .creator-card { transition: none; }
}

@media (max-width: 0px) {
  .hero-grid, .case-intro, .challenge, .creative-heading, .countdown-block { grid-template-columns: 1fr; }
  .hero-grid { gap: 38px; }
  .hero-intro { max-width: 680px; }
  .hero-metrics { grid-template-columns: repeat(2, 1fr); }
  .hero-metrics article:nth-child(2) { border-right: 0; }
  .section-heading { grid-template-columns: 1fr; }
  .operation-steps { grid-template-columns: repeat(2, 1fr); }
  .operation-steps article:nth-child(2) { border-right: 0; }
  .results-copy { grid-template-columns: 50px 1fr; }
  .results-copy > p { grid-column: 2; }
  .result-grid { grid-template-columns: repeat(2, 1fr); }
  .result-grid article:nth-child(2) { border-right: 0; }
  .poster-layout { grid-template-columns: 1.2fr .8fr; }
  .poster-main { grid-row: span 2; }
  .countdown-block { gap: 40px; }
  .video-grid { grid-template-columns: 1fr 1fr; }
  .video-feature { grid-column: 1 / -1; }
  .production-count { grid-template-columns: 1fr 1fr; }
  .production-count p { grid-column: 1 / -1; }
}

@media (max-width: 0px) {
  .site-header { min-height: 62px; grid-template-columns: 1fr auto; }
  .desktop-nav { display: none; }
  .header-cta { font-size: 13px; }
  .hero, .work-index, .next-work { padding-left: 20px; padding-right: 20px; }
  .hero { padding-top: 56px; }
  .hero h1 { font-size: clamp(45px, calc(var(--vw) * 0.14), 68px); }
  .role-tabs { margin-top: 42px; }
  .hero-metrics { margin-top: 52px; }
  .hero-metrics article { min-height: 126px; padding: 20px 12px 18px 0; }
  .hero-metrics article:not(:first-child) { padding-left: 14px; }
  .hero-metrics strong { font-size: 42px; }
  .work-index { padding-top: 70px; }
  .case-banner { border-radius: 10px; }
  .case-banner img { aspect-ratio: 3.5 / 1; }
  .case-banner-label { display: none; }
  .case-intro, .challenge, .results, .creator-showcase { padding: 80px 0; }
  .case-description .lead { font-size: 20px; }
  .project-facts div { grid-template-columns: 82px 1fr; }
  .operation-system, .creative-system, .video-system { padding: 80px 20px; }
  .operation-steps { grid-template-columns: 1fr; }
  .operation-steps article { min-height: auto; padding: 24px 0 36px !important; border-right: 0; border-bottom: 1px solid #444; }
  .operation-steps h3 { margin-top: 38px; }
  .results-copy { grid-template-columns: 1fr; }
  .results-copy > p { grid-column: 1; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .result-grid article { min-height: 180px; }
  .result-grid strong { font-size: 46px; }
  .poster-layout { gap: 10px; }
  .poster-layout figcaption { display: none; }
  .countdown-block { margin-top: 82px; }
  .countdown-gallery { gap: 7px; }
  .countdown-gallery img:nth-child(2) { transform: translateY(18px); }
  .video-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .video-feature { display: block; }
  .video-feature video { aspect-ratio: 3 / 4; }
  .video-feature > div, .video-card > div { padding: 17px; }
  .production-count { gap: 14px; }
  .production-count strong { font-size: 48px; }
  .production-count span { font-size: 13px; }
  .creator-cards { grid-template-columns: 1fr; }
  .creator-card { min-height: 340px; }
  .reflection { padding-bottom: 90px; }
  footer { padding: 80px 20px 30px; display: block; }
  footer > a { display: inline-block; margin-top: 60px; }
}