@font-face{font-family:"Cormorant Garamond";src:url("../fonts/cormorant-garamond-500.woff2") format("woff2");font-style:normal;font-weight:500;font-display:swap}
@font-face{font-family:"Cormorant Garamond";src:url("../fonts/cormorant-garamond-500-italic.woff2") format("woff2");font-style:italic;font-weight:500;font-display:swap}
@font-face{font-family:"Inter";src:url("../fonts/inter-400.woff2") format("woff2");font-style:normal;font-weight:400 600;font-display:swap}
@font-face{font-family:"Noto Serif SC";src:url("../fonts/noto-serif-sc-600-subset.woff2") format("woff2");font-style:normal;font-weight:600 700;font-display:swap}

:root{
  --primitive-ink:oklch(17.4% .005 75);
  --primitive-ivory:oklch(94.7% .014 86);
  --primitive-bronze:oklch(63.5% .085 72);
  --primitive-stone:oklch(59.5% .014 75);
  --ink:var(--primitive-ink);
  --ivory:var(--primitive-ivory);
  --bronze:var(--primitive-bronze);
  --stone:var(--primitive-stone);
  --line:rgba(244,239,230,.14);
  --line-dark:rgba(14,13,11,.18);
  --stone-light:oklch(45% .018 75);
  --display:"Cormorant Garamond","Noto Serif SC","Noto Serif CJK SC","Songti SC",serif;
  --sans:"Inter","Noto Sans SC","Noto Sans CJK SC","PingFang SC","Microsoft YaHei",sans-serif;
  --gutter:40px;
  --section:140px;
  --header-h:72px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--ink)}
body{margin:0;min-width:320px;background:var(--ink);color:var(--ivory);font-family:var(--sans);font-size:16px;font-weight:400;line-height:1.8;-webkit-font-smoothing:antialiased}
body.menu-open{overflow:hidden}
::selection{background:var(--bronze);color:var(--ink)}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
img{display:block;max-width:100%}
h1,h2,h3,p,figure,dl,dd{margin:0}
h1,h2,h3{font-family:var(--display);font-weight:500}
ul,ol{margin:0;padding:0;list-style:none}
address{font-style:normal}
main{overflow:clip}
.container{width:min(100%,1200px);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:var(--section)}
.section--light{background:var(--ivory);color:var(--ink)}
.section--full{min-height:100svh;display:flex;align-items:center}
.kicker{display:block;color:var(--bronze);font-size:11px;line-height:1.4;letter-spacing:.2em;text-transform:uppercase}
.display-xl{font-size:clamp(56px,6.7vw,96px);line-height:1.08;letter-spacing:-.035em}
.display-lg{font-size:clamp(44px,5.4vw,78px);line-height:1.15;letter-spacing:-.025em}
.display-md{font-size:clamp(34px,3.6vw,54px);line-height:1.25}
.lede{max-width:34em;color:var(--stone);font-size:15px;line-height:1.9}
.section--light .lede{color:var(--stone-light)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
html[lang="zh"] .lang-en,html[lang="en"] .lang-zh{display:none!important}
html[lang="en"] .display-xl,html[lang="en"] .display-lg,html[lang="en"] .display-md{letter-spacing:-.025em}

/* Header */
.site-header{position:fixed;inset:0 0 auto;z-index:100;height:var(--header-h);border-bottom:1px solid transparent;transition:background-color .25s ease,border-color .25s ease,backdrop-filter .25s ease}
.site-header.is-scrolled,.site-header.menu-active{background:rgba(14,13,11,.9);border-bottom-color:var(--line);backdrop-filter:blur(12px)}
.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:32px}
.brand{position:relative;z-index:102;display:inline-flex;align-items:center;gap:12px;min-height:44px}
.brand-logo{display:block;width:auto;height:42px;flex:0 0 auto}
.brand-logo--small{height:32px}
.brand-mark{font-family:var(--display);font-size:25px;line-height:1;letter-spacing:.03em;white-space:nowrap}
.brand-name{font-size:11px;letter-spacing:.15em;color:var(--stone);white-space:nowrap}
.header-actions{display:flex;align-items:center;gap:24px}
.site-nav{display:flex;align-items:center;gap:32px}
.nav-link{position:relative;display:inline-flex;align-items:center;min-height:44px;font-size:12px;letter-spacing:.08em;color:var(--ivory)}
.nav-link::after,.text-link::after{content:"";position:absolute;left:0;right:0;bottom:7px;height:1px;background:var(--bronze);transform:scaleX(0);transform-origin:right;transition:transform .25s ease}
.nav-link:hover::after,.nav-link:focus-visible::after,.nav-link[aria-current="page"]::after,.text-link:hover::after,.text-link:focus-visible::after{transform:scaleX(1);transform-origin:left}
.nav-link[aria-current="page"]{color:var(--bronze)}
.language-toggle,.nav-toggle{position:relative;z-index:102;min-width:44px;min-height:44px;padding:0;border:0;background:transparent;color:var(--ivory);font-size:11px;letter-spacing:.12em}
.nav-toggle{display:none}
.nav-toggle-lines{display:flex;width:22px;height:14px;margin:auto;flex-direction:column;justify-content:space-between}
.nav-toggle-lines::before,.nav-toggle-lines::after{content:"";display:block;width:100%;height:1px;background:currentColor;transition:transform .25s ease}
.menu-active .nav-toggle-lines::before{transform:translateY(6.5px) rotate(45deg)}
.menu-active .nav-toggle-lines::after{transform:translateY(-6.5px) rotate(-45deg)}
:focus-visible{outline:1px solid var(--bronze);outline-offset:5px}

/* Links and actions */
.actions{display:flex;align-items:center;flex-wrap:wrap;gap:28px;margin-top:40px}
.text-link{position:relative;display:inline-flex;align-items:center;gap:22px;min-height:44px;font-size:13px;letter-spacing:.08em}
.text-link .arrow{display:inline-block;color:var(--bronze);font-size:18px;transition:transform .25s ease}
.text-link:hover .arrow{transform:translateX(5px)}
.text-link--primary{padding-inline:20px;border:1px solid var(--bronze)}
.text-link--primary::after{display:none}
.text-link--primary:hover{background:var(--bronze);color:var(--ink)}
.section--light .text-link--primary:hover{color:var(--ivory)}

/* Home hero */
.hero{position:relative;min-height:100svh;padding-top:calc(var(--header-h) + 64px);padding-bottom:56px;display:flex;align-items:center}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(300px,5fr);gap:48px;align-items:end;width:100%}
.hero-copy{position:relative;z-index:2;padding-bottom:24px}
.hero h1{margin-top:24px;max-width:8em}
.hero-meta{margin-top:28px;max-width:440px;color:var(--stone);font-size:14px;line-height:1.9}
.hero-tech{margin-top:20px;color:var(--bronze);font-size:11px;line-height:1.6;letter-spacing:.16em;text-transform:uppercase}
.hero-figure{position:relative;height:min(63vh,670px);margin-bottom:-56px;overflow:hidden;background:#241a13}
.hero-figure img{width:100%;height:112%;object-fit:cover;object-position:center;will-change:transform;transform:scale(1.06)}
.image-caption{position:absolute;right:16px;bottom:12px;color:rgba(244,239,230,.72);font-size:10px;letter-spacing:.12em;writing-mode:vertical-rl}
.scroll-cue{position:absolute;left:var(--gutter);bottom:24px;display:flex;align-items:center;gap:16px;color:var(--stone);font-size:10px;letter-spacing:.18em;text-transform:uppercase}
.scroll-cue::before{content:"";width:40px;height:1px;background:var(--bronze)}

/* Philosophy */
.physics-label{display:flex;justify-content:space-between;align-items:start;gap:24px;margin-bottom:64px}
.philosophy h2{max-width:12em}
.philosophy .lede{margin-top:40px;margin-left:50%}

/* Services */
.section-heading{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;margin-bottom:72px}
.services-grid{display:grid;grid-template-columns:1fr 1fr;column-gap:64px}
.service-item{position:relative;padding:26px 0 30px;border-top:1px solid var(--line)}
.service-item:last-child,.service-item:nth-last-child(2){border-bottom:1px solid var(--line)}
.service-top{display:flex;align-items:baseline;gap:24px}
.service-number{flex:0 0 24px;color:var(--bronze);font-size:11px;letter-spacing:.12em}
.service-item h3{font-size:26px;line-height:1.35}
.service-item p{margin-top:10px;margin-left:48px;color:var(--stone);font-size:13px;line-height:1.8}
.section--light .service-item{border-color:var(--line-dark)}
.section--light .service-item p{color:var(--stone-light)}
.service-tags{display:flex;flex-wrap:wrap;gap:8px 20px;margin:14px 0 0 48px;color:var(--stone);font-size:11px;letter-spacing:.06em}
.section--light .service-tags{color:var(--stone-light)}

/* Proof */
.proof-list{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.proof-item{padding:24px 28px 32px;border-left:1px solid var(--line-dark)}
.proof-item:first-child{padding-left:0;border-left:0}
.proof-item dt{font-family:var(--display);font-size:clamp(58px,6vw,88px);line-height:1;letter-spacing:-.04em}
.proof-item dd{margin-top:24px;color:var(--stone-light);font-size:13px;line-height:1.7}

/* Contact */
.contact-section{min-height:78svh;display:flex;align-items:center}
.contact-email{display:inline-block;margin-top:40px;font-family:var(--display);font-size:clamp(32px,5.4vw,78px);line-height:1.2;letter-spacing:-.03em;overflow-wrap:anywhere}
.contact-meta{margin-top:32px;color:var(--stone);font-size:13px;letter-spacing:.05em}

/* Inner pages */
.page-hero{padding-top:calc(var(--header-h) + 100px);padding-bottom:110px}
.page-hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:64px;align-items:end}
.page-hero h1{margin-top:24px;font-size:clamp(44px,5.8vw,84px)}
.page-hero .lede{margin-top:32px}
.page-figure{height:min(68vh,680px);overflow:hidden;background:#241a13}
.page-figure img{width:100%;height:110%;object-fit:cover;transform:scale(1.06)}
.page-hero--simple{min-height:66svh;display:flex;align-items:flex-end}
.page-hero--simple .container{width:100%}
.manifesto-grid{display:grid;grid-template-columns:5fr 7fr;gap:64px}
.manifesto-grid .lede{max-width:25em}
.manifesto-grid .display-md{font-size:clamp(30px,3.6vw,54px)}
.mobile-break{display:none}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);margin-top:80px}
.timeline-item{padding:28px 28px 0 0;border-top:1px solid var(--line)}
.timeline-item:not(:last-child){margin-right:28px}
.timeline-year{color:var(--bronze);font-family:var(--display);font-size:34px}
.timeline-item p{margin-top:18px;color:var(--stone);font-size:13px}
.process{display:grid;grid-template-columns:repeat(4,1fr);margin-top:64px}
.process-step{position:relative;padding:30px 24px 0 0;border-top:1px solid var(--line-dark)}
.process-step:not(:last-child){margin-right:24px}
.process-step::before{content:"";position:absolute;top:-3px;left:0;width:5px;height:5px;background:var(--bronze);border-radius:50%}
.process-step h3{font-family:var(--sans);font-size:15px;font-weight:400}
.process-step p{margin-top:12px;color:var(--stone-light);font-size:12px}

/* Contact page and form */
.contact-layout{display:grid;grid-template-columns:5fr 7fr;gap:88px}
.contact-details{display:flex;flex-direction:column;gap:30px}
.contact-detail .kicker{margin-bottom:8px}
.contact-detail p,.contact-detail a{font-size:14px;line-height:1.9}
.inquiry-form{display:grid;grid-template-columns:1fr 1fr;gap:30px 24px}
.field{display:flex;flex-direction:column;gap:8px}
.field--full{grid-column:1/-1}
.field label{font-size:12px;letter-spacing:.08em;color:var(--stone)}
.field input,.field textarea{width:100%;min-height:48px;padding:10px 0;border:0;border-bottom:1px solid var(--line);border-radius:0;outline:none;background:transparent;color:var(--ivory);font-size:15px;transition:border-color .2s ease}
.field textarea{min-height:128px;resize:vertical}
.field input:focus,.field textarea:focus{border-bottom-color:var(--bronze)}
.field input::placeholder,.field textarea::placeholder{color:var(--stone)}
.form-footer{grid-column:1/-1;display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.submit-button{min-height:48px;padding:10px 24px;border:1px solid var(--bronze);border-radius:0;background:transparent;color:var(--ivory);font-size:13px;letter-spacing:.08em;transition:background-color .2s ease,color .2s ease}
.submit-button:hover{background:var(--bronze);color:var(--ink)}
.submit-button:disabled{cursor:wait;opacity:.55}
.form-status{min-height:24px;color:var(--bronze);font-size:13px}

/* Footer */
.site-footer{padding:56px 0 40px;border-top:1px solid var(--line);background:var(--ink);color:var(--ivory)}
.footer-top{display:flex;justify-content:space-between;gap:48px;align-items:start}
.footer-brand{font-family:var(--display);font-size:38px;line-height:1}
.footer-note{max-width:360px;color:var(--stone);font-size:12px;text-align:right}
.footer-legal{display:grid;grid-template-columns:1fr auto;gap:24px;margin-top:48px;padding-top:24px;border-top:1px solid var(--line);color:var(--stone);font-size:11px;line-height:1.9}
.footer-legal address{max-width:660px}
.footer-beian{color:inherit;text-decoration:none;opacity:.85;transition:opacity .3s}
.footer-beian:hover{opacity:1;text-decoration:underline}

/* Motion: content is visible by default, even without JavaScript. */
.reveal.is-visible{animation:reveal-in 1.2s ease-out both}
@keyframes reveal-in{from{opacity:0;transform:translateY(18px) scale(.995)}to{opacity:1;transform:translateY(0) scale(1)}}

/* Admin */
.admin-main{min-height:100svh;padding:120px 0 80px}
.admin-shell{max-width:960px;margin:auto}
.admin-header{display:flex;align-items:end;justify-content:space-between;gap:24px;padding-bottom:28px;border-bottom:1px solid var(--line)}
.admin-login{max-width:420px;margin:100px auto 0}
.admin-login form{display:grid;gap:24px;margin-top:32px}
.admin-message{padding:24px 0;border-bottom:1px solid var(--line)}
.admin-message-meta{display:flex;flex-wrap:wrap;gap:12px 24px;color:var(--stone);font-size:12px}
.admin-message-body{margin:16px 0;white-space:pre-wrap;overflow-wrap:anywhere}
.admin-actions{display:flex;gap:16px}
.admin-empty{padding:80px 0;color:var(--stone);text-align:center}

@media (max-width:1000px){
  :root{--gutter:32px;--section:110px}
  .brand-name{display:none}
  .hero-grid{grid-template-columns:3fr 2fr;gap:32px}
  .services-grid{column-gap:36px}
  .contact-layout{gap:48px}
}
@media (max-width:820px){
  :root{--gutter:24px;--section:80px}
  .nav-toggle{display:block}
  .header-actions{gap:8px}
  .site-nav{position:fixed;inset:var(--header-h) 0 0;z-index:99;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:12px;padding:48px var(--gutter);background:var(--ink);opacity:0;visibility:hidden;transform:translateY(-16px);pointer-events:none;transition:opacity .25s ease,transform .25s ease,visibility .25s}
  .menu-active .site-nav{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto}
  .site-nav .nav-link{font-family:var(--display);font-size:38px;line-height:1.4;letter-spacing:0}
  .site-nav .nav-link::after{bottom:5px}
  .hero{align-items:flex-start;padding-top:calc(var(--header-h) + 64px);padding-bottom:80px}
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero h1{max-width:9em}
  .hero-figure{height:52vh;min-height:360px;margin:0}
  .scroll-cue{display:none}
  .section--full{min-height:auto}
  .philosophy .lede{margin-left:0}
  .section-heading,.page-hero-grid,.manifesto-grid,.contact-layout{grid-template-columns:1fr;gap:32px}
  .section-heading{margin-bottom:48px}
  .services-grid{grid-template-columns:1fr}
  .service-item:nth-last-child(2){border-bottom:0}
  .service-item:last-child{border-bottom:1px solid var(--line)}
  .proof-list{grid-template-columns:repeat(3,1fr)}
  .proof-item{padding-inline:20px}
  .page-hero{padding-top:calc(var(--header-h) + 80px);padding-bottom:80px}
  .page-figure{height:58vh;min-height:420px}
  .timeline,.process{grid-template-columns:1fr 1fr;gap:40px 24px;margin-top:56px}
  .timeline-item:not(:last-child),.process-step:not(:last-child){margin-right:0}
  .contact-layout{gap:64px}
  .footer-top{flex-direction:column}
  .footer-note{text-align:left}
  .footer-legal{grid-template-columns:1fr}
}
@media (max-width:520px){
  .display-xl{font-size:clamp(46px,13vw,64px)}
  .display-lg{font-size:clamp(40px,11vw,54px)}
  .display-md{font-size:32px}
  .mobile-break{display:block}
  .hero-meta{font-size:13px}
  .actions{gap:16px 24px}
  .physics-label{margin-bottom:40px}
  .service-item h3{font-size:24px}
  .proof-list{grid-template-columns:1fr}
  .proof-item,.proof-item:first-child{padding:28px 0;border-left:0;border-top:1px solid var(--line-dark)}
  .proof-item:first-child{border-top:0}
  .proof-item dt{font-size:58px}
  .contact-email{font-size:34px}
  .inquiry-form{grid-template-columns:1fr}
  .field--full,.form-footer{grid-column:auto}
  .timeline,.process{grid-template-columns:1fr}
  .timeline-item,.process-step{padding-top:24px}
  .admin-header{align-items:start;flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .hero-figure img,.page-figure img{transform:none!important;will-change:auto}
}