:root {
  --ink: #080808;
  --ink-soft: #151515;
  --paper: #f2efe7;
  --paper-bright: #faf9f5;
  --white: #fff;
  --blue: #293cff;
  --red: #e63c25;
  --acid: #d3ff3f;
  --line-light: rgba(255,255,255,.24);
  --line-dark: rgba(8,8,8,.22);
  --sans: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Times New Roman", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--ink); }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
body.menu-open { overflow: hidden; }
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p, figure { margin: 0; }

.skip-link { position: fixed; z-index: 999; top: 10px; left: 10px; padding: 10px 14px; color: var(--ink); background: var(--acid); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: fixed; z-index: 100; top: 0; left: 0; width: 100%; height: 76px; display: flex; align-items: center; justify-content: space-between; padding: 0 3.1vw; color: var(--white); border-bottom: 1px solid var(--line-light); transition: background-color .2s ease; }
.site-header.scrolled { background: rgba(8,8,8,.93); backdrop-filter: blur(12px); }
.brand { display: inline-flex; align-items: center; width: 112px; }
.brand img { width: 100%; height: auto; }
.site-nav { display: flex; align-items: center; gap: clamp(22px, 3vw, 52px); font-size: .75rem; font-weight: 650; letter-spacing: .04em; }
.site-nav a { position: relative; padding: 8px 0; }
.site-nav a::after { position: absolute; right: 0; bottom: 2px; left: 0; height: 1px; content: ""; background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform .2s ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after, .site-nav a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }
.menu-toggle { display: none; align-items: center; gap: 12px; padding: 10px 0; color: inherit; background: none; border: 0; font: inherit; }
.menu-toggle span { font-size: .75rem; font-weight: 650; }
.menu-toggle i, .menu-toggle i::after { display: block; width: 24px; height: 1px; background: currentColor; transition: transform .18s ease; }
.menu-toggle i { position: relative; }
.menu-toggle i::after { position: absolute; top: 7px; left: 0; content: ""; }
.menu-toggle[aria-expanded="true"] i { transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] i::after { top: 0; transform: rotate(-90deg); }

.page-kicker { font-size: .72rem; font-weight: 700; letter-spacing: .12em; }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .72s cubic-bezier(.22,1,.36,1), transform .72s cubic-bezier(.22,1,.36,1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* 首页 */
.home-intro { min-height: 78svh; display: grid; grid-template-columns: repeat(12,1fr); align-content: end; gap: 0; padding: 10rem 3.1vw 6vw; color: var(--white); background: var(--ink); }
.home-meta { grid-column: 1 / 4; align-self: end; padding-bottom: 1rem; color: var(--acid); font-size: .7rem; font-weight: 700; letter-spacing: .14em; }
.home-intro h1 { grid-column: 3 / 12; font-family: var(--serif); font-size: clamp(4.6rem, 9.4vw, 11rem); font-weight: 400; line-height: .94; letter-spacing: -.085em; }
.home-lead { grid-column: 9 / 13; margin-top: 3rem; font-size: .95rem; line-height: 1.8; }

.home-studios { min-height: 96svh; display: grid; grid-template-columns: 7fr 5fr; color: var(--white); background: var(--ink); border-top: 1px solid var(--line-light); }
.studio-entry { position: relative; min-width: 0; overflow: hidden; border-right: 1px solid var(--line-light); }
.studio-entry:last-child { border-right: 0; }
.entry-index { position: absolute; z-index: 3; top: 2rem; left: 2rem; font-size: .67rem; font-weight: 700; letter-spacing: .08em; }
.entry-copy { position: absolute; z-index: 3; right: 2rem; bottom: 7.5rem; left: 2rem; }
.entry-copy > p { margin-bottom: 1.5rem; font-size: .72rem; font-weight: 700; letter-spacing: .08em; }
.entry-copy h2 { font-family: var(--serif); font-size: clamp(3.8rem,5.8vw,7rem); font-weight: 400; line-height: .94; letter-spacing: -.078em; }
.entry-tags { display: block; margin-top: 1.7rem; font-size: .67rem; letter-spacing: .07em; }
.entry-link { position: absolute; z-index: 3; right: 2rem; bottom: 2rem; left: 2rem; display: flex; justify-content: space-between; align-items: center; padding-top: 1rem; border-top: 1px solid currentColor; font-size: .72rem; }
.entry-link b { font-size: 1.45rem; font-weight: 400; transition: transform .25s ease; }
.studio-entry:hover .entry-link b { transform: translate(5px,-5px); }
.studio-entry-ai { background: var(--blue); }
.studio-entry-ai::before { position: absolute; inset: 0; content: ""; opacity: .48; background: linear-gradient(90deg,transparent calc(33.333% - .5px),rgba(255,255,255,.25) 33.333%,transparent calc(33.333% + .5px)),linear-gradient(90deg,transparent calc(66.666% - .5px),rgba(255,255,255,.25) 66.666%,transparent calc(66.666% + .5px)),linear-gradient(0deg,transparent calc(50% - .5px),rgba(255,255,255,.25) 50%,transparent calc(50% + .5px)); }
.entry-ai-visual { position: absolute; top: 5.5rem; right: 2rem; width: 42%; overflow: hidden; box-shadow: -1.2rem 1.2rem 0 rgba(211,255,63,.92); transform: rotate(2deg); transition: transform .7s cubic-bezier(.22,1,.36,1); }
.entry-ai-visual img { aspect-ratio: 1.12 / 1; object-fit: cover; filter: saturate(.72) contrast(1.05); }
.studio-entry-ai:hover .entry-ai-visual { transform: rotate(0) translateY(-8px); }
.studio-entry-art::after { position: absolute; inset: 0; content: ""; background: linear-gradient(0deg,rgba(0,0,0,.88),rgba(0,0,0,.05) 70%); }
.entry-art-image { position: absolute; inset: 0; height: 100%; object-fit: cover; transition: transform 1s cubic-bezier(.22,1,.36,1); }
.studio-entry-art:hover .entry-art-image { transform: scale(1.035); }
.studio-entry-art .entry-copy h2 { font-size: clamp(3.6rem,4.8vw,6rem); }

.home-contact { min-height: 160px; display: grid; grid-template-columns: 2fr 10fr; align-items: center; padding: 2.5rem 3.1vw; background: var(--paper-bright); border-top: 1px solid var(--line-dark); }
.home-contact > p { font-size: .68rem; font-weight: 700; letter-spacing: .08em; }
.home-contact > div { display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.home-contact a { font-family: var(--serif); font-size: clamp(1.2rem,2vw,2.2rem); letter-spacing: -.03em; }
.home-contact a:hover { color: var(--blue); }
.home-contact span { font-size: .72rem; }

/* AI 页面 */
.ai-hero { min-height: 100svh; display: grid; grid-template-columns: 54% 46%; color: var(--white); background: var(--blue); }
.ai-hero-copy { display: flex; flex-direction: column; justify-content: flex-end; padding: 9rem 4vw 5vw 3.1vw; border-right: 1px solid var(--line-light); }
.ai-hero-copy .page-kicker { color: var(--acid); }
.ai-hero-copy h1 { margin: 4vh 0; font-family: var(--serif); font-size: clamp(5rem, 9.2vw, 10.8rem); font-weight: 400; line-height: .88; letter-spacing: -.09em; }
.ai-hero-copy > p:last-child { max-width: 470px; font-size: 1rem; line-height: 1.8; }
.ai-hero-visual { position: relative; display: flex; flex-direction: column; justify-content: center; padding: 9rem 3.1vw 4vw; }
.ai-visual-main { width: 100%; }
.ai-visual-main img { aspect-ratio: 1.12 / 1; object-fit: cover; filter: contrast(1.02) saturate(.82); }
.ai-visual-note { display: grid; grid-template-columns: 1fr 2fr; margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--line-light); }
.ai-visual-note span { font-size: .68rem; font-weight: 700; }
.ai-visual-note strong { font-family: var(--serif); font-size: clamp(1.3rem,2vw,2.1rem); font-weight: 400; line-height: 1.25; }

.ai-start, .ai-delivery { padding: 9vw 3.1vw 6vw; background: var(--paper-bright); }
.ai-section-title { display: grid; grid-template-columns: 2fr 10fr; align-items: start; }
.ai-section-title span { color: var(--blue); font-size: .82rem; font-weight: 700; }
.ai-section-title h2 { max-width: 1080px; font-family: var(--serif); font-size: clamp(3.6rem,7.2vw,8.4rem); font-weight: 400; line-height: .98; letter-spacing: -.08em; }
.use-case-list { width: 75%; margin: 8vw 0 0 auto; border-top: 1px solid var(--line-dark); }
.use-case-list article { display: grid; grid-template-columns: 1fr 2fr; gap: 2rem; padding: 1.35rem 0; border-bottom: 1px solid var(--line-dark); }
.use-case-list span { font-family: var(--serif); font-size: clamp(1.4rem,2.1vw,2.3rem); }
.use-case-list p { max-width: 480px; align-self: center; color: #3f3f3f; font-size: .9rem; line-height: 1.7; }

.ai-example { padding: 9vw 3.1vw 8vw; color: var(--white); background: var(--ink); }
.ai-section-title.light span { color: var(--acid); }
.example-layout { display: grid; grid-template-columns: 7fr 5fr; gap: 5vw; align-items: end; margin-top: 7vw; }
.example-image img { min-height: 620px; object-fit: cover; }
.example-copy > p { max-width: 520px; margin-bottom: 4rem; font-size: 1rem; line-height: 1.9; }
.example-copy ul { margin: 0; padding: 0; border-top: 1px solid var(--line-light); list-style: none; }
.example-copy li { display: flex; justify-content: space-between; gap: 2rem; padding: 1.25rem 0; border-bottom: 1px solid var(--line-light); }
.example-copy li span { font-family: var(--serif); font-size: 1.5rem; }
.example-copy li strong { align-self: center; color: rgba(255,255,255,.62); font-size: .76rem; font-weight: 400; }

.delivery-list { display: grid; grid-template-columns: repeat(4,1fr); margin: 7vw 0 0; padding: 0; border-top: 1px solid var(--line-dark); list-style: none; }
.delivery-list li { min-height: 250px; padding: 1.2rem 1.4rem 1.2rem 0; border-right: 1px solid var(--line-dark); }
.delivery-list li + li { padding-left: 1.4rem; }
.delivery-list li:last-child { border-right: 0; }
.delivery-list span { color: var(--blue); font-size: .78rem; font-weight: 700; }
.delivery-list h3 { margin: 4rem 0 1.3rem; font-family: var(--serif); font-size: clamp(1.5rem,2.3vw,2.5rem); font-weight: 400; }
.delivery-list p { max-width: 260px; color: #4a4a4a; font-size: .82rem; line-height: 1.75; }
.ai-scope { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 5rem; }
.ai-scope span { padding: .7rem 1rem; border: 1px solid var(--line-dark); font-size: .72rem; }

/* 数字艺术页面 */
.art-hero { position: relative; min-height: 100svh; color: var(--white); background: var(--ink); overflow: hidden; }
.art-hero > img, .art-hero-shade { position: absolute; inset: 0; height: 100%; }
.art-hero > img { object-fit: cover; }
.art-hero-shade { background: linear-gradient(0deg,rgba(0,0,0,.8),rgba(0,0,0,.08) 62%),linear-gradient(90deg,rgba(0,0,0,.55),transparent 60%); }
.art-hero-copy { position: absolute; z-index: 2; bottom: 16vh; left: 3.1vw; }
.art-hero-copy p { margin-bottom: 2rem; color: var(--acid); font-size: .7rem; font-weight: 700; letter-spacing: .1em; }
.art-hero-copy h1 { max-width: 1120px; font-family: var(--serif); font-size: clamp(4.8rem,9vw,10.5rem); font-weight: 400; line-height: .92; letter-spacing: -.09em; }
.art-hero-caption { position: absolute; z-index: 2; right: 3.1vw; bottom: 4vw; left: 3.1vw; display: flex; justify-content: space-between; padding-top: 1rem; border-top: 1px solid var(--line-light); }
.art-hero-caption span { font-size: .68rem; letter-spacing: .1em; }
.art-hero-caption strong { font-family: var(--serif); font-size: 1.4rem; font-weight: 400; }

.art-preface { min-height: 82svh; display: grid; grid-template-columns: 2fr 7fr 3fr; align-content: center; gap: 2rem; padding: 9vw 3.1vw; background: var(--paper-bright); }
.art-preface .page-kicker { color: var(--blue); }
.art-preface h2 { font-family: var(--serif); font-size: clamp(3.4rem,6.4vw,7.6rem); font-weight: 400; line-height: .98; letter-spacing: -.08em; }
.art-disciplines { align-self: end; display: flex; flex-direction: column; border-top: 1px solid var(--line-dark); }
.art-disciplines span { padding: .7rem 0; border-bottom: 1px solid var(--line-dark); font-size: .72rem; }

.art-journal { display: grid; grid-template-columns: repeat(12,1fr); row-gap: 13vw; padding: 11vw 3.1vw 14vw; color: var(--white); background: var(--ink); overflow: hidden; }
.art-frame img { object-fit: cover; }
.art-frame figcaption, .archive-grid figcaption { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding-top: .8rem; }
.art-frame figcaption span, .archive-grid figcaption span { font-size: .65rem; letter-spacing: .07em; }
.art-frame figcaption strong, .archive-grid figcaption strong { font-family: var(--serif); font-size: clamp(1.05rem,1.6vw,1.8rem); font-weight: 400; }
.frame-science { grid-row: 1; grid-column: 5 / 13; }
.frame-science img { aspect-ratio: 1.5 / 1; }
.frame-renxi { grid-row: 2; grid-column: 1 / 11; }
.frame-renxi img { aspect-ratio: 1.9 / 1; }
.frame-audio { grid-row: 3; grid-column: 8 / 13; }
.frame-audio img { aspect-ratio: 1.75 / 1; filter: grayscale(1) contrast(1.08); }
.frame-carnival { grid-row: 4; grid-column: 3 / 13; }
.frame-carnival img { aspect-ratio: 1.78 / 1; }
.journal-note { grid-column: 1 / 5; align-self: center; font-family: var(--serif); font-size: clamp(2.4rem,4.5vw,5.3rem); line-height: 1.05; letter-spacing: -.06em; }
.note-light { grid-row: 1; color: var(--acid); }
.note-body { grid-row: 3; grid-column: 2 / 8; padding-left: 8vw; color: rgba(255,255,255,.82); }

.art-archive { padding: 10vw 3.1vw 12vw; background: var(--paper-bright); }
.archive-head { display: grid; grid-template-columns: 3fr 9fr; align-items: start; }
.archive-head p { color: var(--blue); font-size: .72rem; font-weight: 700; letter-spacing: .08em; }
.archive-head h2 { font-family: var(--serif); font-size: clamp(3.5rem,7.2vw,8.5rem); font-weight: 400; line-height: .95; letter-spacing: -.08em; }
.archive-grid { display: grid; grid-template-columns: repeat(12,1fr); align-items: end; row-gap: 9vw; margin-top: 9vw; }
.archive-main { grid-column: 4 / 13; }
.archive-main img { aspect-ratio: 1.78 / 1; object-fit: cover; }
.archive-small { grid-column: 1 / 6; }
.archive-small img { aspect-ratio: 1.32 / 1; object-fit: cover; }
.archive-tall { grid-column: 8 / 13; }
.archive-tall img { aspect-ratio: 1.05 / 1; object-fit: cover; }

/* 联系与页脚 */
.page-contact { min-height: 300px; display: grid; grid-template-columns: 2fr 7fr 3fr; align-items: center; gap: 2rem; padding: 4.5rem 3.1vw; color: var(--white); }
.ai-contact { background: var(--blue); }
.art-contact { background: var(--ink); }
.page-contact .page-kicker { color: var(--acid); }
.page-contact h2 { max-width: 760px; font-family: var(--serif); font-size: clamp(2rem,3.5vw,4rem); font-weight: 400; line-height: 1.05; letter-spacing: -.055em; }
.page-contact-links { display: flex; flex-direction: column; gap: .8rem; padding-top: 1rem; border-top: 1px solid var(--line-light); }
.page-contact-links > * { font-size: .76rem; }
.page-contact-links a:hover { color: var(--acid); }

.site-footer { min-height: 110px; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; padding: 2rem 3.1vw; color: rgba(255,255,255,.68); background: var(--ink); font-size: .64rem; letter-spacing: .05em; }
.footer-records { display: flex; gap: 1.4rem; }
.footer-records a { display: inline-flex; align-items: center; gap: 5px; }
.footer-records a:hover, .site-footer > a:hover { color: var(--white); }
.footer-records img { width: 16px; height: 16px; }

@media (max-width: 1020px) {
  .home-intro h1 { grid-column: 2 / 13; }
  .home-lead { grid-column: 8 / 13; }
  .home-studios { grid-template-columns: 1fr; }
  .studio-entry { min-height: 82svh; border-right: 0; border-bottom: 1px solid var(--line-light); }
  .studio-entry:last-child { border-bottom: 0; }
  .entry-ai-visual { width: 34%; }
  .ai-hero { grid-template-columns: 1fr; }
  .ai-hero-copy { min-height: 88svh; border-right: 0; }
  .ai-hero-visual { min-height: 80svh; }
  .use-case-list { width: 84%; }
  .example-layout { grid-template-columns: 1fr; }
  .example-image { width: 82%; }
  .example-copy { width: 70%; margin-left: auto; }
  .delivery-list { grid-template-columns: 1fr 1fr; }
  .delivery-list li:nth-child(2) { border-right: 0; }
  .delivery-list li:nth-child(n+3) { border-top: 1px solid var(--line-dark); }
  .art-preface { grid-template-columns: 2fr 7fr; }
  .art-disciplines { grid-column: 2; width: 55%; margin-top: 2rem; }
  .page-contact { grid-template-columns: 2fr 7fr; }
  .page-contact-links { grid-column: 2; width: 52%; }
}

@media (max-width: 740px) {
  .site-header { height: 68px; padding: 0 16px; }
  .brand { width: 94px; }
  .menu-toggle { display: flex; }
  .site-nav { position: fixed; inset: 68px 0 0; display: none; flex-direction: column; align-items: stretch; justify-content: center; gap: 0; padding: 24px 18px; color: var(--white); background: var(--ink); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 1.2rem 0; font-family: var(--serif); font-size: 2.2rem; font-weight: 400; letter-spacing: -.04em; border-bottom: 1px solid var(--line-light); }

  .home-intro { min-height: 76svh; display: block; padding: 8rem 16px 3rem; }
  .home-meta { margin-bottom: 5rem; }
  .home-intro h1 { font-size: clamp(4rem,18vw,5.7rem); line-height: .96; }
  .home-lead { width: 78%; margin: 2.5rem 0 0 auto; font-size: .82rem; }
  .studio-entry { min-height: 76svh; }
  .entry-index { top: 1.4rem; left: 16px; }
  .entry-copy { right: 16px; bottom: 6.5rem; left: 16px; }
  .entry-copy h2, .studio-entry-art .entry-copy h2 { font-size: clamp(3.2rem,13vw,4.8rem); }
  .entry-link { right: 16px; bottom: 1.4rem; left: 16px; }
  .entry-ai-visual { top: 4.5rem; right: 16px; width: 48%; box-shadow: -.65rem .65rem 0 rgba(211,255,63,.92); }
  .home-contact { min-height: 150px; display: block; padding: 2.4rem 16px; }
  .home-contact > div { display: flex; flex-direction: column; align-items: flex-start; gap: .7rem; margin-top: 1.6rem; }
  .home-contact a { font-size: 1.35rem; }

  .ai-hero-copy { min-height: 92svh; padding: 8rem 16px 3rem; }
  .ai-hero-copy h1 { margin: 5rem 0 3rem; font-size: clamp(4.7rem,22vw,6.4rem); }
  .ai-hero-copy > p:last-child { width: 86%; margin-left: auto; font-size: .88rem; }
  .ai-hero-visual { min-height: auto; padding: 5rem 16px; }
  .ai-visual-note { grid-template-columns: 1fr; gap: 1rem; }
  .ai-start, .ai-delivery { padding: 6rem 16px 4rem; }
  .ai-section-title { display: block; }
  .ai-section-title h2 { margin-top: 3rem; font-size: 3.7rem; }
  .use-case-list { width: 100%; margin-top: 5rem; }
  .use-case-list article { grid-template-columns: 1fr; gap: .7rem; }
  .ai-example { padding: 6rem 16px 5rem; }
  .example-layout { margin-top: 5rem; }
  .example-image { width: 100%; }
  .example-image img { min-height: 420px; }
  .example-copy { width: 100%; }
  .example-copy > p { margin: 3rem 0; }
  .example-copy li { display: block; }
  .example-copy li strong { display: block; margin-top: .5rem; }
  .delivery-list { display: block; margin-top: 5rem; }
  .delivery-list li, .delivery-list li + li { min-height: auto; padding: 1rem 0 2rem; border-right: 0; border-bottom: 1px solid var(--line-dark); }
  .delivery-list h3 { margin: 2rem 0 1rem; }

  .art-hero { min-height: 100svh; }
  .art-hero-copy { right: 16px; bottom: 18vh; left: 16px; }
  .art-hero-copy h1 { font-size: clamp(4rem,18vw,5.6rem); }
  .art-hero-caption { right: 16px; bottom: 2rem; left: 16px; display: block; }
  .art-hero-caption strong { display: block; margin-top: .7rem; }
  .art-preface { min-height: auto; display: block; padding: 6rem 16px; }
  .art-preface h2 { margin: 3rem 0 4rem; font-size: 3.6rem; }
  .art-disciplines { width: 100%; margin: 0; }
  .art-journal { display: block; padding: 6rem 16px; }
  .art-frame, .journal-note { width: 100%; margin: 0 0 6rem; }
  .frame-science { width: 88%; margin-left: auto; }
  .frame-audio { width: 74%; margin-left: auto; }
  .frame-carnival { width: calc(100% + 16px); }
  .journal-note { font-size: 3.2rem; }
  .note-body { width: 86%; padding-left: 12vw; }
  .art-frame figcaption, .archive-grid figcaption { display: block; }
  .art-frame figcaption strong, .archive-grid figcaption strong { display: block; margin-top: .45rem; }
  .art-archive { padding: 6rem 16px; }
  .archive-head { display: block; }
  .archive-head h2 { margin-top: 3rem; font-size: 3.8rem; }
  .archive-grid { display: block; margin-top: 5rem; }
  .archive-grid figure { width: 100%; margin-bottom: 5rem; }
  .archive-grid .archive-small { width: 76%; }
  .archive-grid .archive-tall { width: 78%; margin-left: auto; }

  .page-contact { min-height: auto; display: block; padding: 4rem 16px; }
  .page-contact h2 { margin: 2.5rem 0 3rem; font-size: 2.6rem; }
  .page-contact-links { width: 100%; }
  .site-footer { grid-template-columns: 1fr; padding: 2.5rem 16px; }
  .footer-records { flex-direction: column; gap: .8rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}