:root {
  --ink: #090a0d;
  --coal: #111217;
  --soft-coal: #191b22;
  --paper: #f4f3ef;
  --mist: #c8c9cc;
  --quiet: #8e9099;
  --line: rgba(255, 255, 255, 0.16);
  --violet: #aaaaff;
  --blue: #6f8cff;
  --shell: min(1280px, calc(100% - 64px));
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}

html { background: var(--ink); scroll-behavior: smooth; }

body.marketing-home { min-width: 320px; margin: 0; background: var(--ink); color: var(--paper); line-height: 1.55; }

body.marketing-home * { box-sizing: border-box; }
body.marketing-home img { display: block; max-width: 100%; height: auto; }
body.marketing-home a { color: inherit; text-decoration: none; }
body.marketing-home h1, body.marketing-home h2, body.marketing-home h3, body.marketing-home p, body.marketing-home figure { margin: 0; }
body.marketing-home button { font: inherit; }

.page-shell { width: var(--shell); margin-inline: auto; }
.section-space { padding-block: clamp(56px, 7vw, 104px); }
.works.section-space,
.style-study.section-space,
.detail-study.section-space,
.craft.section-space,
.flow.section-space,
.trust.section-space,
.access.section-space { padding-block: clamp(52px, 6vw, 88px); }

.skip-link { position: fixed; z-index: 100; top: 16px; left: 16px; padding: 12px 16px; color: var(--ink); background: var(--paper); transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--violet); outline-offset: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }

.site-header { position: absolute; z-index: 10; top: 0; left: 50%; display: flex; align-items: center; justify-content: space-between; width: var(--shell); min-height: 88px; transform: translateX(-50%); }
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 18px; font-weight: 730; letter-spacing: -0.04em; }
.brand img { width: 40px; border-radius: 10px; }
.desktop-nav { display: flex; align-items: center; gap: 12px; }
.nav-pill { display: flex; align-items: center; gap: 2px; padding: 5px; border: 1px solid rgba(255, 255, 255, 0.16); border-radius: 999px; background: rgba(10, 11, 14, 0.72); backdrop-filter: blur(16px); }
.nav-pill a { padding: 9px 13px; border-radius: 999px; font-size: 13px; color: rgba(255, 255, 255, 0.78); transition: background 180ms ease, color 180ms ease; }
.nav-pill a:hover, .nav-pill a:focus-visible { color: var(--ink); background: var(--paper); outline: none; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 13px 20px; border-radius: 999px; font-size: 15px; font-weight: 700; letter-spacing: -0.02em; transition: transform 180ms ease, background 180ms ease; }
.button:hover { transform: translateY(-2px); }
.marketing-home .button-light { color: var(--ink); background: var(--paper); }
.button-light:hover { background: white; }
.button-small { min-height: 42px; padding-inline: 16px; font-size: 13px; }
.mobile-nav { display: none; }

.hero { position: relative; isolation: isolate; min-height: max(720px, 100svh); overflow: hidden; background: #16222e; }
.hero-media, .hero-media img, .hero-shade { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-media img { object-fit: cover; object-position: center; }
.hero-shade { background: linear-gradient(180deg, rgba(5, 7, 10, 0.24) 0%, rgba(5, 7, 10, 0.02) 36%, rgba(5, 7, 10, 0.84) 84%, #090a0d 100%), linear-gradient(90deg, rgba(5, 7, 10, 0.56) 0%, transparent 56%); }
.hero-content { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: flex-start; justify-content: flex-end; gap: 20px; min-height: calc(max(720px, 100svh) - 112px); padding-top: 120px; padding-bottom: 128px; }
.hero-wordmark { font-size: clamp(58px, 8vw, 128px); font-weight: 760; letter-spacing: -0.085em; line-height: 0.8; }
.hero-message { max-width: 650px; }
.eyebrow { margin-bottom: 16px !important; color: var(--violet); font-size: 12px; font-weight: 720; letter-spacing: 0.12em; text-transform: uppercase; }
.hero h1 { max-width: none; font-size: clamp(46px, 5.9vw, 82px); font-weight: 730; letter-spacing: -0.055em; line-height: 0.98; }
.hero h1 span { display: block; white-space: nowrap; }
html[lang="zh-CN"] .hero h1 { font-size: clamp(46px, 5.4vw, 76px); letter-spacing: -0.045em; }
html[lang="zh-CN"] .hero h1 span { word-break: keep-all; }
.hero-lead { max-width: 36ch; margin-top: 22px !important; color: rgba(255, 255, 255, 0.82); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; margin-top: 28px; }
.text-link { display: inline-flex; align-items: center; min-height: 44px; border-bottom: 1px solid currentColor; font-size: 15px; font-weight: 650; transition: color 180ms ease; }
.text-link:hover { color: var(--violet); }
.proof-strip { position: absolute; z-index: 2; bottom: 25px; left: 50%; display: flex; gap: 0; padding: 0; transform: translateX(-50%); list-style: none; color: rgba(255, 255, 255, 0.78); font-size: 13px; }
.proof-strip li { padding-inline: 16px; border-left: 1px solid rgba(255, 255, 255, 0.34); }
.proof-strip li:first-child { padding-left: 0; border-left: 0; }

.section-intro { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.65fr); gap: 48px; align-items: end; margin-bottom: clamp(28px, 4vw, 52px); }
.section-intro h2, .flow h2, .access h2, .trust h2, .download h2 { font-size: clamp(38px, 5.1vw, 72px); font-weight: 710; letter-spacing: -0.075em; line-height: 1.02; text-wrap: balance; }
.section-intro > p { max-width: 34ch; color: var(--mist); font-size: 17px; }
.works { background: #101116; color: var(--paper); }
.works .eyebrow { color: var(--violet); }
.work-grid { display: grid; grid-template-columns: 1.34fr 1fr; grid-template-rows: auto auto; gap: clamp(16px, 2.4vw, 32px); }
.work { overflow: hidden; background: #171820; }
.work-portrait { grid-row: span 2; }
.work img { width: 100%; height: 100%; min-height: 280px; object-fit: cover; transition: transform 550ms cubic-bezier(.2,.8,.2,1); }
.work:hover img { transform: scale(1.025); }
.work-portrait img { min-height: 640px; }
.work-landscape img { object-position: center 55%; }
.work figcaption { display: grid; gap: 6px; padding: 13px 2px 0; color: var(--mist); font-size: 13px; }
.work figcaption strong { color: var(--paper); font-size: 15px; }

.style-study { position: relative; overflow: hidden; background: #0d0e13; }
.style-study::before { position: absolute; inset: 0; pointer-events: none; content: ""; background: radial-gradient(circle at 50% 90%, rgba(104, 93, 202, 0.13), transparent 30rem); }
.style-study .page-shell { position: relative; }
.style-triptych { display: grid; grid-template-columns: 0.88fr 1.2fr 0.88fr; gap: clamp(14px, 2.4vw, 32px); align-items: end; max-width: 1050px; margin-inline: auto; }
.style-card { margin: 0; overflow: hidden; background: #171820; }
.style-card img { display: block; width: 100%; aspect-ratio: 0.72; object-fit: cover; object-position: 30% center; }
.style-warm { transform: translateY(-28px); }
.style-warm img { aspect-ratio: 0.74; filter: saturate(1.03) sepia(0.07) contrast(1.03); }
.style-cool img { filter: saturate(0.66) hue-rotate(150deg) brightness(0.82) contrast(1.1); }
.style-mono img { filter: grayscale(1) contrast(1.18) brightness(0.93); }
.style-card figcaption { display: flex; justify-content: center; gap: 10px; min-height: 48px; padding: 16px 12px; color: var(--mist); font-size: 14px; }
.style-warm figcaption { flex-direction: column; align-items: center; color: var(--paper); }
.style-warm figcaption strong { font-weight: 720; }
.style-warm figcaption span { color: var(--quiet); font-size: 11px; }
.style-rail { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; max-width: 700px; gap: 0; margin: 14px auto 0; }
.style-rail span { height: 1px; background: rgba(255, 255, 255, 0.27); }
.style-rail i { width: 156px; height: 2px; background: linear-gradient(90deg, var(--blue), var(--violet)); }

.detail-study { background: #12131a; color: var(--paper); }
.detail-study .eyebrow { color: var(--violet); }
.detail-study-grid { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(290px, 0.7fr); gap: clamp(32px, 6vw, 88px); align-items: center; }
.detail-photo { position: relative; min-height: 430px; overflow: hidden; background: #171820; }
.detail-photo > img { display: block; width: 100%; height: 100%; min-height: 430px; object-fit: cover; object-position: 24% center; }
.detail-crop { position: absolute; right: 8%; bottom: 9%; width: min(34%, 240px); aspect-ratio: 1; overflow: hidden; border: 2px solid rgba(255, 255, 255, 0.9); box-shadow: 0 16px 42px rgba(0, 0, 0, 0.42); }
.detail-crop img { width: 100%; height: 100%; object-fit: cover; object-position: 74% 42%; transform: scale(2.05); }
.detail-points { display: grid; gap: 28px; margin: 0; padding: 0; list-style: none; }
.detail-points li { padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.detail-points li:last-child { padding-bottom: 0; border-bottom: 0; }
.detail-points span { display: block; margin-bottom: 9px; color: var(--violet); font-size: 11px; font-weight: 720; letter-spacing: 0.12em; }
.detail-points h3 { margin-bottom: 7px; font-size: 24px; letter-spacing: -0.05em; }
.detail-points p { max-width: 31ch; color: var(--mist); font-size: 15px; }

.craft { position: relative; overflow: hidden; background: var(--coal); }
.craft::before { position: absolute; inset: 0; pointer-events: none; content: ""; background: radial-gradient(circle at 88% 18%, rgba(113, 125, 255, 0.15), transparent 28rem), radial-gradient(circle at 13% 78%, rgba(97, 69, 150, 0.12), transparent 22rem); }
.craft .page-shell { position: relative; }
.section-intro-light > p { color: var(--mist); }
.showcase { border-top: 1px solid var(--line); }
.case-chain { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 0 0 clamp(60px, 9vw, 112px); padding: 0; list-style: none; }
.case-chain li { overflow: hidden; border: 1px solid rgba(255, 255, 255, 0.12); background: #0b0c11; }
.case-chain img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: center; }
.case-chain .case-phone img { object-fit: contain; background: #101116; }
.case-chain div { padding: 16px 16px 18px; }
.case-chain span { display: block; margin-bottom: 10px; color: var(--violet); font-size: 11px; font-weight: 720; letter-spacing: 0.12em; }
.case-chain h3 { margin-bottom: 6px; font-size: 17px; letter-spacing: -0.035em; }
.case-chain p { color: var(--mist); font-size: 13px; }
.showcase-tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--line); }
.showcase-tabs button { min-height: 60px; padding: 0 24px; color: var(--quiet); border: 0; border-bottom: 2px solid transparent; background: transparent; cursor: pointer; font-weight: 680; }
.showcase-tabs button[aria-selected="true"] { color: var(--paper); border-bottom-color: var(--violet); }
.showcase-panel { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(260px, 0.62fr); gap: clamp(28px, 6vw, 90px); align-items: center; padding-top: clamp(30px, 5vw, 72px); }
.showcase-panel[hidden] { display: none; }
.showcase-visual { overflow: hidden; background: #08090d; border: 1px solid rgba(255, 255, 255, 0.12); }
.showcase-visual img { width: 100%; max-height: 720px; object-fit: contain; background: #08090d; }
.showcase-phone { display: grid; place-items: center; }
.showcase-phone img { width: min(460px, 100%); }
.showcase-copy { max-width: 330px; }
.showcase-copy h3 { margin-bottom: 16px; font-size: clamp(30px, 3.4vw, 48px); letter-spacing: -0.06em; line-height: 1.03; }
.showcase-copy p:last-child { color: var(--mist); font-size: 17px; }

.flow { background: var(--ink); }
.flow-title-block { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 40px; align-items: end; padding-bottom: 64px; border-bottom: 1px solid var(--line); }
.flow-title-block .eyebrow { align-self: start; }
.flow-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 34px 0 0; list-style: none; }
.flow-steps li { display: grid; gap: 34px; min-height: 230px; padding-right: 20px; border-right: 1px solid var(--line); }
.flow-steps li:last-child { border-right: 0; }
.flow-steps span { color: var(--violet); font-size: 13px; font-weight: 720; letter-spacing: 0.12em; }
.flow-steps h3 { margin-bottom: 10px; font-size: 22px; letter-spacing: -0.04em; }
.flow-steps p { color: var(--mist); font-size: 15px; }

.trust { background: #0d0e13; color: var(--paper); }
.trust-grid { display: grid; grid-template-columns: minmax(180px, 0.6fr) minmax(0, 1fr); gap: clamp(40px, 11vw, 180px); align-items: center; }
.trust-mark { width: min(300px, 100%); }
.trust-mark img { width: 100%; border-radius: 26%; box-shadow: 0 32px 80px rgba(31, 36, 70, 0.18); }
.trust .eyebrow { color: var(--violet); }
.trust-copy { max-width: 720px; }
.trust-copy > p:not(.eyebrow) { max-width: 44ch; margin-top: 18px !important; color: var(--mist); font-size: 18px; }
.trust-links { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 28px; }

.access { background: #12131a; color: var(--paper); border-top: 1px solid var(--line); }
.access-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: clamp(32px, 5vw, 80px); }
.access-title .eyebrow { color: var(--violet); }
.access-column { padding-top: 18px; border-top: 2px solid var(--paper); }
.access-column h3 { margin-bottom: 14px; font-size: 24px; letter-spacing: -0.05em; }
.access-column p { color: var(--mist); font-size: 16px; }
.device-note { display: grid; grid-template-columns: 150px 1fr; gap: 18px; margin-top: 42px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--mist); font-size: 14px; }
.device-note strong { color: var(--paper); }

.download { position: relative; min-height: 620px; overflow: hidden; isolation: isolate; background: #20242f; }
.download-media, .download-shade { position: absolute; inset: 0; width: 100%; height: 100%; }
.download-media { object-fit: cover; object-position: center; }
.download-shade { background: linear-gradient(90deg, rgba(6, 7, 9, 0.91) 0%, rgba(6, 7, 9, 0.58) 50%, rgba(6, 7, 9, 0.2) 100%); }
.download-content { position: relative; z-index: 1; padding-top: clamp(110px, 13vw, 180px); padding-bottom: 80px; }
.download-content h2 { max-width: 11ch; }
.download-content > p:not(.eyebrow) { margin: 24px 0 28px !important; color: rgba(255, 255, 255, 0.8); }

.site-footer { display: grid; grid-template-columns: 1fr auto 1fr; gap: 24px; align-items: center; min-height: 124px; color: var(--quiet); font-size: 13px; }
.site-footer .brand { color: var(--paper); }
.site-footer .brand img { width: 36px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 18px; justify-content: center; }
.site-footer nav a:hover { color: var(--paper); }
.site-footer p { justify-self: end; }

@media (max-width: 900px) {
  :root { --shell: min(100% - 40px, 760px); }
  .site-header { min-height: 76px; }
  .desktop-nav { display: none; }
  .mobile-nav { display: block; position: relative; }
  .mobile-nav summary { min-height: 44px; padding: 11px 0 11px 14px; list-style: none; cursor: pointer; font-size: 14px; font-weight: 700; }
  .mobile-nav summary::-webkit-details-marker { display: none; }
  .mobile-nav nav { position: absolute; top: 52px; right: 0; display: grid; min-width: 190px; padding: 8px; border: 1px solid var(--line); background: rgba(10, 11, 14, 0.94); box-shadow: 0 16px 44px rgba(0, 0, 0, 0.32); }
  .mobile-nav nav a { min-height: 44px; padding: 12px; font-size: 14px; }
  .mobile-nav nav a:hover { background: rgba(255, 255, 255, 0.11); }
  .hero-content { gap: 18px; padding-bottom: 115px; }
  .hero-wordmark { font-size: clamp(58px, 12vw, 96px); }
  .hero-message { max-width: 480px; }
  .section-intro { grid-template-columns: 1fr; gap: 22px; }
  .section-intro > p { max-width: 48ch; }
  .showcase-panel { grid-template-columns: 1fr; gap: 28px; }
  .showcase-copy { max-width: 560px; }
  .case-chain { grid-template-columns: 1fr; max-width: 640px; }
  .style-triptych { max-width: 760px; }
  .detail-study-grid { grid-template-columns: 1fr; gap: 44px; }
  .detail-points { grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .detail-points li { padding: 0; border: 0; }
  .flow-title-block { grid-template-columns: 1fr; gap: 18px; }
  .flow-steps { grid-template-columns: repeat(2, 1fr); row-gap: 34px; }
  .flow-steps li:nth-child(2) { border-right: 0; }
  .trust-grid { grid-template-columns: 180px 1fr; gap: 52px; }
  .access-grid { grid-template-columns: 1fr 1fr; }
  .access-title { grid-column: span 2; }
  .site-footer { grid-template-columns: 1fr auto; }
  .site-footer nav { grid-row: 2; grid-column: 1 / -1; justify-content: flex-start; }
}

@media (max-width: 620px) {
  :root { --shell: calc(100% - 32px); }
  .section-space,
  .works.section-space,
  .style-study.section-space,
  .detail-study.section-space,
  .craft.section-space,
  .flow.section-space,
  .trust.section-space,
  .access.section-space { padding-block: 44px; }
  .site-header { min-height: 64px; }
  .brand { gap: 8px; font-size: 16px; }
  .brand img { width: 32px; }
  .hero { min-height: 100svh; }
  .hero-media img { object-position: center; }
  .hero-shade { background: linear-gradient(180deg, rgba(5, 7, 10, 0.08) 0%, rgba(5, 7, 10, 0.06) 34%, rgba(5, 7, 10, 0.87) 77%, #090a0d 100%); }
  .hero-content { min-height: 100svh; padding-top: 90px; padding-bottom: 66px; }
  .hero-wordmark { align-self: start; margin-top: 120px; font-size: 42px; }
  .hero-message { margin-top: auto; }
  .hero h1 { font-size: clamp(37px, 10.6vw, 48px); letter-spacing: -0.04em; }
  .hero h1 span { white-space: normal; }
  html[lang="zh-CN"] .hero h1 { font-size: clamp(37px, 10.2vw, 47px); }
  .hero-lead { margin-top: 15px !important; font-size: 15px; }
  .hero-actions { gap: 14px; margin-top: 20px; }
  .button { min-height: 46px; padding-inline: 17px; font-size: 14px; }
  .proof-strip { bottom: 19px; font-size: 11px; }
  .proof-strip li { padding-inline: 10px; }
  .work-grid { display: grid; grid-template-columns: 1fr; gap: 32px; }
  .work-portrait { grid-row: auto; }
  .work img, .work-portrait img { min-height: 0; aspect-ratio: 4 / 3; object-fit: cover; }
  .work-landscape img { object-position: center; }
  .style-triptych { grid-template-columns: 0.82fr 1fr 0.82fr; gap: 8px; }
  .style-card img { aspect-ratio: 0.59; }
  .style-warm { transform: translateY(-14px); }
  .style-warm img { aspect-ratio: 0.62; }
  .style-card figcaption { min-height: 40px; padding: 10px 4px; font-size: 12px; }
  .style-warm figcaption span { display: none; }
  .style-rail { max-width: 260px; margin-top: 6px; }
  .style-rail i { width: 64px; }
  .detail-photo, .detail-photo > img { min-height: 320px; }
  .detail-crop { right: 7%; bottom: 8%; width: 38%; }
  .detail-points { grid-template-columns: 1fr; gap: 24px; }
  .detail-points li { padding-bottom: 20px; border-bottom: 1px solid var(--line); }
  .detail-points li:last-child { padding-bottom: 0; border-bottom: 0; }
  .showcase-tabs { overflow-x: auto; }
  .showcase-tabs button { flex: 0 0 auto; min-height: 54px; padding-inline: 18px; }
  .showcase-visual img { max-height: none; }
  .case-chain { gap: 14px; margin-bottom: 56px; }
  .flow-steps { grid-template-columns: 1fr; padding-top: 18px; }
  .flow-steps li, .flow-steps li:nth-child(2) { grid-template-columns: 54px 1fr; gap: 16px; min-height: 0; padding: 20px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .flow-steps li:last-child { border-bottom: 0; }
  .trust-grid { grid-template-columns: 1fr; gap: 36px; }
  .trust-mark { width: 150px; }
  .trust-copy > p:not(.eyebrow) { font-size: 16px; }
  .access-grid { grid-template-columns: 1fr; gap: 36px; }
  .access-title { grid-column: auto; }
  .device-note { grid-template-columns: 1fr; gap: 6px; margin-top: 48px; }
  .download { min-height: 560px; }
  .download-media { object-position: center; }
  .download-shade { background: linear-gradient(180deg, rgba(6, 7, 9, 0.43) 0%, rgba(6, 7, 9, 0.88) 74%, #090a0d 100%); }
  .site-footer { grid-template-columns: 1fr; gap: 22px; padding-block: 42px; }
  .site-footer p { justify-self: start; }
  .site-footer nav { grid-row: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}