@font-face{font-family:"Inter Tight";src:url(/fonts/inter-tight-400.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Inter Tight";src:url(/fonts/inter-tight-500.woff2) format("woff2");font-weight:500 700;font-display:swap}
:root{
  --blue:#0038A3;--ink:#000;--paper:#fff;--line:.5px solid #000;
  --m:11px;--g:10px;--hdr:58px;
  --f:"Inter Tight","Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --ease:cubic-bezier(.87,0,.13,1);
  --fs-s:12px;--fs-m:15px;--fs-l:clamp(20px,1.7vw,26px);--fs-xl:clamp(30px,3.6vw,56px);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:var(--hdr)}
body{font-family:var(--f);font-size:var(--fs-m);line-height:1.35;color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;overflow-x:hidden}
html[data-lang="zh"] body{line-height:1.6}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;border-radius:0}
img,canvas{display:block;max-width:100%}
ul,ol{list-style:none}
::selection{background:var(--blue);color:#fff}
.mono{font-size:var(--fs-s);letter-spacing:.02em;text-transform:uppercase;line-height:1.125}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:var(--g);padding:0 var(--m)}
.sr-img{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}

/* blink keyframes (hard step, .75s) */
@keyframes blink{0%,49.9%{opacity:1}50%,100%{opacity:0}}
.dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--blue);margin-right:8px;vertical-align:-1px;flex:none}

/* ---------- sweeper intro ---------- */
.sweeper{position:fixed;inset:0;z-index:100;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;transition:transform 1.1s var(--ease)}
.sweeper__mark{display:flex;flex-direction:column;align-items:center;gap:8px;opacity:0;animation:markIn .5s .15s steps(3) forwards}
.sweeper__mark span{font-size:clamp(44px,8vw,120px);font-weight:500;letter-spacing:-.04em;line-height:.9}
.sweeper__mark small{font-size:12px;letter-spacing:.12em}
@keyframes markIn{to{opacity:1}}
body.is-ready .sweeper{transform:translateY(-100%)}
.sweeper.sweep{transform:translateY(0)!important;transition:transform .45s var(--ease)}
body.is-loading{overflow:hidden}

/* ---------- header ---------- */
.hdr{position:fixed;top:0;left:0;right:0;height:var(--hdr);z-index:50;background:var(--paper);display:flex;align-items:center;justify-content:space-between;padding:0 var(--m);gap:20px}
.hdr__line{position:absolute;left:0;bottom:0;height:.5px;width:100%;background:#000;transform-origin:left;transform:scaleX(0);transition:transform 1.25s var(--ease) .35s}
body.is-ready .hdr__line{transform:scaleX(1)}
.hdr__progress{position:absolute;left:0;bottom:-1px;height:2px;background:var(--blue);width:100%;transform-origin:left;transform:scaleX(0)}
.logo{display:flex;align-items:baseline;gap:10px;white-space:nowrap;transform-origin:left center;transition:transform .5s var(--ease)}
.logo__main{font-size:28px;font-weight:500;letter-spacing:-.045em;line-height:1}
.logo__sub{font-size:10px;letter-spacing:.1em;text-transform:uppercase}
body.scrolled .logo{transform:scale(.775)}
.nav{display:flex;gap:22px;margin-left:auto}
.nav a,.lang,.brief-btn{font-size:var(--fs-s);text-transform:uppercase;letter-spacing:.02em;position:relative;display:inline-flex;align-items:center;white-space:nowrap}
.nav a::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--blue);margin-right:6px;transform:scale(0);transition:transform .2s steps(2)}
.nav a.active::before{transform:scale(1)}
.nav a:hover::before{transform:scale(1);animation:blink .75s infinite}
.hdr__tools{display:flex;align-items:center;gap:18px}
.lang,.brief-btn{display:inline-block}
.lang span{opacity:.35}
html[data-lang="en"] .lang__en,html[data-lang="zh"] .lang__zh{opacity:1}
.lang:hover{color:var(--blue)}
.brief-btn{padding:6px 10px;border:var(--line)}
.brief-btn:hover{background:var(--blue);color:#fff;border-color:var(--blue)}
.brief-btn.bump{animation:bump .6s steps(2) 2}
@keyframes bump{50%{background:var(--blue);color:#fff}}
.burger{display:none;width:28px;height:20px;position:relative}
.burger span{position:absolute;left:0;right:0;height:.5px;background:#000;transition:transform .3s var(--ease)}
.burger span:first-child{top:6px}.burger span:last-child{top:13px}
body.menu-open .burger span:first-child{transform:translateY(3.5px) rotate(45deg)}
body.menu-open .burger span:last-child{transform:translateY(-3.5px) rotate(-45deg)}

/* links with blinking underline */
.link-btn{font-size:var(--fs-s);text-transform:uppercase;letter-spacing:.02em;position:relative;padding-bottom:3px;display:inline-flex;gap:4px;align-items:center}
.link-btn::after{content:"";position:absolute;left:0;right:0;bottom:0;height:.5px;background:currentColor}
.link-btn:hover{color:var(--blue)}
.link-btn:hover::after{animation:blink .75s infinite}
.link-btn.added{color:var(--blue)}
.plus{display:inline-block;width:12px;text-align:center}

/* ---------- typography ---------- */
.display{font-size:var(--fs-xl);font-weight:500;letter-spacing:-.035em;line-height:1}
.display--sm{font-size:clamp(28px,3.2vw,48px)}
html[data-lang="zh"] .display{letter-spacing:0;line-height:1.15}
.h2{font-size:clamp(24px,2.6vw,40px);font-weight:500;letter-spacing:-.03em;line-height:1.05}
html[data-lang="zh"] .h2{letter-spacing:0;line-height:1.25}
.h3{font-size:var(--fs-l);font-weight:500;letter-spacing:-.02em;line-height:1.1}
.lead{font-size:clamp(15px,1.15vw,18px);line-height:1.35;max-width:46ch}
html[data-lang="zh"] .lead{line-height:1.7}
.eyebrow{margin-bottom:14px;display:flex;align-items:center}
.eyebrow::before{content:"";width:10px;height:10px;border-radius:50%;background:var(--blue);margin-right:8px;animation:blink .75s infinite}

/* ---------- gallery hero ---------- */
.gallery{position:relative;height:340vh}
.gallery__pin{position:sticky;top:var(--hdr);height:calc(100vh - var(--hdr));height:calc(100svh - var(--hdr));display:flex;flex-direction:column;overflow:hidden}
.strip{position:relative;height:max(92px,12vh);border-bottom:var(--line);overflow:hidden;cursor:grab;flex:none;touch-action:pan-y;user-select:none;-webkit-user-select:none}
.strip.dragging{cursor:grabbing}
.strip__track{position:absolute;top:0;left:0;height:100%;display:flex;will-change:transform}
.thumb{height:100%;padding:10px 5px;flex:none;position:relative}
.thumb canvas{height:100%;width:auto;outline:var(--line);outline-offset:-.25px;background:#fff}
.thumb.on canvas{outline:1.5px solid var(--blue);outline-offset:-1px}
.strip__marker{position:absolute;top:0;bottom:0;left:50%;width:.5px;background:var(--blue);pointer-events:none}
.strip__marker::after{content:"";position:absolute;top:4px;left:-4px;width:8px;height:8px;border-radius:50%;background:var(--blue)}
.stage{flex:1;min-height:0;padding-top:var(--m);padding-bottom:var(--m)}
.stage__media{grid-column:1/7;position:relative;min-height:0;display:flex;flex-direction:column}
.stage__media canvas{flex:1;width:100%;min-height:0;cursor:zoom-in}
.stage__cap{display:flex;justify-content:space-between;padding-top:8px;border-top:var(--line);margin-top:8px}
.stage__info{grid-column:8/13;display:flex;flex-direction:column;justify-content:space-between;min-height:0;gap:16px}
.stage__intro .lead{margin-top:16px}
.archive{border-top:var(--line)}
.archive__head{display:flex;gap:16px;align-items:baseline;padding:10px 0;border-bottom:var(--line)}
.archive__idx{color:var(--blue)}
.archive__title{font-size:var(--fs-l);font-weight:500;letter-spacing:-.02em;line-height:1.1}
.archive__fields div{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,3fr);gap:var(--g);padding:7px 0;border-bottom:var(--line)}
.archive__fields dt{font-size:var(--fs-s);text-transform:uppercase;letter-spacing:.02em}
.archive__fields dd{font-size:13px;line-height:1.3}
.archive__actions{display:flex;gap:22px;padding-top:12px;flex-wrap:wrap}
.archive.flash .archive__title,.archive.flash dd{animation:flash .3s steps(2)}
@keyframes flash{0%{opacity:0}100%{opacity:1}}
.scroll-hint{opacity:.55}

/* ---------- sticky chapters ---------- */
.chapters{position:relative}
.chapter{position:sticky;top:var(--hdr);min-height:calc(100vh - var(--hdr));background:var(--paper);border-top:var(--line);overflow:hidden}
.chapter__inner{padding-top:28px;padding-bottom:40px;min-height:calc(100vh - var(--hdr));align-content:start}
.chapter__dim{position:absolute;inset:0;background:#000;opacity:var(--dim,0);pointer-events:none}
.chapter__index{grid-column:1/4;display:flex;align-items:center;gap:.35em}
.chapter__index .dot{margin-right:4px}
.chapter__body{grid-column:4/9}
.chapter__body .lead{margin-top:18px}
.chapter__img{grid-column:9/13;grid-row:1/3;align-self:start}
.chapter__index{grid-row:1}
.chapter__body{grid-row:1/3}
.points{margin-top:26px;border-top:var(--line);counter-reset:p}
.points li{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,3fr);gap:var(--g);padding:11px 0;border-bottom:var(--line);font-size:14px}
.points b{font-weight:500;text-transform:uppercase;font-size:var(--fs-s);letter-spacing:.02em;display:flex}
.points b::before{counter-increment:p;content:counter(p,decimal-leading-zero);color:var(--blue);margin-right:10px}
.note{margin-top:18px;color:var(--blue)}
.px{position:relative}
.px canvas{width:100%;height:auto;aspect-ratio:var(--r,1.5);outline:var(--line);outline-offset:-.25px}
.chapter--services .chapter__inner{display:flex;flex-direction:column;padding-left:var(--m);padding-right:var(--m)}
.services{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:var(--line);margin-top:26px;flex:1}
.svc{padding:16px 16px 22px;border-right:var(--line);display:flex;flex-direction:column;gap:14px;transition:background .2s steps(2)}
.svc:first-child{padding-left:0}.svc:last-child{border-right:0}
.svc__no{color:var(--blue);font-size:clamp(40px,5vw,80px)!important;letter-spacing:-.05em!important;font-weight:500}
.svc__for{opacity:.6;min-height:2.4em}
.svc__list{border-top:var(--line);flex:1}
.svc .link-btn{align-self:flex-start}
.svc__img canvas{aspect-ratio:2.4}
.svc__list li{padding:9px 0;border-bottom:var(--line);font-size:14px}
.svc__list li::before{content:"— "}
.bespoke{display:grid;grid-template-columns:1fr 1fr;border-top:var(--line);margin-top:26px}
.bespoke>div{padding:14px 14px 18px 0;border-bottom:var(--line);font-size:14px}
.bespoke>div:nth-child(odd){border-right:var(--line)}
.bespoke>div:nth-child(even){padding-left:14px}
.bespoke h4{font-weight:500;font-size:var(--fs-l);letter-spacing:-.02em;margin:6px 0 8px}
.bespoke .mono{color:var(--blue)}

/* ---------- section heads ---------- */
section.process,section.index,section.projects,section.faq,section.contact{position:relative;background:var(--paper);border-top:var(--line);z-index:2}
.sec-head{padding-top:28px;padding-bottom:36px;align-items:start}
.sec-head__no{grid-column:1/4;color:var(--blue)}
.sec-head .h2{grid-column:4/10}
.sec-head__lead{grid-column:4/10;margin-top:14px}

/* process */
.steps{border-top:var(--line)}
.step{padding-top:12px;padding-bottom:12px;border-bottom:var(--line);align-items:start;transition:background .15s steps(2)}
.step__no{grid-column:1/4;display:flex;align-items:center}
.step__no .dot{transform:scale(0);transition:transform .15s steps(2)}
.step:hover .step__no .dot{transform:scale(1);animation:blink .75s infinite}
.step:hover .step__t{color:var(--blue)}
.step__t{grid-column:4/7;font-weight:500;font-size:var(--fs-l);letter-spacing:-.02em;line-height:1.1}
.step__d{grid-column:7/11;font-size:14px;max-width:48ch}
.step__img{grid-column:11/13}

/* category index */
.cats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:var(--line);margin:0 var(--m)}
.cat{padding:14px 12px 30px 0;border-bottom:var(--line);border-right:var(--line);display:flex;flex-direction:column;gap:8px;min-height:150px}
.cat:nth-child(4n){border-right:0}
.cat:not(:nth-child(4n+1)){padding-left:12px}
.cat .mono{color:var(--blue)}
.cat b{font-weight:500;font-size:var(--fs-l);letter-spacing:-.02em;line-height:1.1}
.cat i{font-style:normal;font-size:13px;opacity:.65;margin-top:auto}
.cat:hover b{color:var(--blue)}
.index{padding-bottom:60px}

/* projects */
.pgrid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:40px var(--g);padding:0 var(--m) 60px}
.pcard{display:flex;flex-direction:column;gap:8px}
.pcard:nth-child(6n+1){grid-column:1/6}
.pcard:nth-child(6n+2){grid-column:7/10;margin-top:18vh}
.pcard:nth-child(6n+3){grid-column:10/13}
.pcard:nth-child(6n+4){grid-column:2/5}
.pcard:nth-child(6n+5){grid-column:6/9;margin-top:10vh}
.pcard:nth-child(6n+6){grid-column:9/13}
.pcard .px canvas{cursor:zoom-in}
.pcard__meta{display:flex;justify-content:space-between;align-items:baseline;gap:10px;border-top:var(--line);padding-top:6px}
.pcard .link-btn{white-space:nowrap;flex:none}
.pcard__t{text-align:right}
.pcard__t{font-size:14px;font-weight:500}

/* faq */
.qa{border-top:var(--line);margin:0 var(--m) 0;padding-left:calc((100% - 11*var(--g))/12*3 + 3*var(--g))}
.qa details{border-bottom:var(--line)}
.qa summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;padding:14px 0;font-size:var(--fs-l);font-weight:500;letter-spacing:-.02em;line-height:1.15}
.qa summary::-webkit-details-marker{display:none}
.qa summary:hover{color:var(--blue)}
.qa summary i{width:14px;height:14px;position:relative;flex:none;margin-left:20px}
.qa summary i::before,.qa summary i::after{content:"";position:absolute;left:0;right:0;top:50%;height:1px;background:currentColor}
.qa summary i::after{transform:rotate(90deg);transition:transform .25s var(--ease)}
.qa details[open] summary i::after{transform:rotate(0)}
.qa__a{padding:0 0 18px;max-width:62ch;font-size:15px}
.faq{padding-bottom:60px}

/* contact */
.contact{padding:28px 0 60px}
.contact__lead{grid-column:1/6}
.contact__lead .lead{margin-top:18px}
.channels{margin-top:30px;border-top:var(--line)}
.channels li{display:grid;grid-template-columns:110px 1fr auto;gap:var(--g);padding:9px 0;border-bottom:var(--line);font-size:14px;align-items:baseline}
.channels em{font-style:normal;font-size:10px;text-transform:uppercase;letter-spacing:.06em;color:var(--blue);border:.5px solid var(--blue);padding:1px 5px}
.channels a:hover{color:var(--blue)}
.form{grid-column:7/13;border-top:var(--line);display:flex;flex-direction:column}
.form fieldset{border:0;padding:12px 0;border-bottom:var(--line);display:grid;grid-template-columns:1fr 1fr;gap:8px 12px}
.form legend{grid-column:1/-1;float:left;width:100%;margin-bottom:8px}
.chk{display:flex;align-items:center;gap:10px;font-size:14px;cursor:pointer}
.chk input{appearance:none;-webkit-appearance:none;width:14px;height:14px;border:.5px solid #000;border-radius:0;flex:none;display:grid;place-content:center;margin:0}
.chk input:checked{background:var(--blue);border-color:var(--blue)}
.fld{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,4fr);gap:var(--g);padding:10px 0;border-bottom:var(--line);align-items:baseline}
.fld input,.fld textarea{font:inherit;font-size:15px;border:0;outline:0;background:transparent;border-radius:0;width:100%;resize:vertical;color:#000}
.fld input:focus,.fld textarea:focus{box-shadow:0 1.5px 0 var(--blue)}
.cta{display:flex;justify-content:space-between;align-items:center;background:var(--blue);color:#fff;padding:16px 14px;font-size:var(--fs-s);text-transform:uppercase;letter-spacing:.04em;margin-top:16px;border:0;width:100%}
.cta:hover{background:#000}
.form__msg{margin-top:10px;min-height:1.2em;color:var(--blue);text-transform:none;line-height:1.4}

/* footer */
.ftr{border-top:var(--line);padding-top:14px;padding-bottom:20px;align-items:end;row-gap:10px;position:relative;z-index:2;background:#fff}
.ftr__logo{grid-column:1/-1;margin-bottom:10px;font-size:clamp(48px,11vw,180px);font-weight:500;letter-spacing:-.06em;line-height:.8}
.ftr p:nth-child(2){grid-column:1/6}.ftr p:nth-child(3){grid-column:6/11}.ftr p:nth-child(4){grid-column:11/13;text-align:right}

/* drawer */
.scrim{position:fixed;inset:0;background:rgba(255,255,255,.6);z-index:60;opacity:0;pointer-events:none;transition:opacity .3s}
.drawer{position:fixed;top:0;right:0;bottom:0;width:max(33.68vw,380px);background:#fff;border-left:var(--line);z-index:61;transform:translateX(100%);transition:transform .6s var(--ease);display:flex;flex-direction:column;padding:0 var(--m)}
body.drawer-open .drawer{transform:none}
body.drawer-open .scrim{opacity:1;pointer-events:auto}
.drawer__head{height:var(--hdr);display:flex;justify-content:space-between;align-items:center;border-bottom:var(--line);flex:none}
.drawer__list{flex:1;overflow:auto}
.drawer__list li{display:grid;grid-template-columns:64px 1fr auto;gap:12px;align-items:center;padding:10px 0;border-bottom:var(--line);font-size:14px}
.drawer__list img{width:64px;height:44px;object-fit:cover;outline:var(--line)}
.drawer__list .ph{width:64px;height:44px;background:var(--blue)}
.drawer__empty{padding:20px 0;font-size:14px;opacity:.6}
.drawer__list:not(:empty)+.drawer__empty{display:none}
.drawer__foot{padding:14px 0 18px;border-top:var(--line)}

/* inspect overlay */
.inspect{position:fixed;inset:0;z-index:70;background:hsla(0,0%,100%,.92);display:flex;align-items:center;justify-content:center;padding:calc(var(--hdr) + 20px) 40px 40px;opacity:0;pointer-events:none;transition:opacity .15s steps(2)}
.inspect.on{opacity:1;pointer-events:auto;cursor:zoom-out}
.inspect img{max-width:100%;max-height:100%;object-fit:contain;outline:var(--line)}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .nav{gap:14px}
  .logo__sub{display:none}
}
@media (max-width:900px){
  :root{--hdr:52px}
  .burger{display:block}
  .nav{position:fixed;top:var(--hdr);left:0;right:0;flex-direction:column;gap:0;background:#fff;border-bottom:var(--line);padding:0 var(--m);transform:translateY(-120%);transition:transform .5s var(--ease);z-index:-1}
  .nav a{padding:14px 0;border-top:var(--line);font-size:14px}
  body.menu-open .nav{transform:none}
  .logo__sub{display:inline}
}
@media (max-width:767px){
  :root{--fs-xl:clamp(34px,10vw,46px)}
  .logo__main{font-size:22px}
  .logo__sub{display:none}
  .hdr__tools{gap:12px}
  .brief-btn{padding:5px 7px}
  /* gallery: stage on top, filmstrip at bottom */
  .gallery{height:auto;padding-top:var(--hdr)}
  .gallery__pin{position:relative;top:0;height:auto;overflow:visible}
  .strip{order:2;height:88px;border-top:var(--line)}
  .stage{order:1;display:flex;flex-direction:column;gap:16px}
  .stage__media{height:56vw;min-height:200px}
  .stage__info{gap:18px}
  .stage__intro{order:-1}
  .scroll-hint{display:none}
  .stage{padding-top:16px}
  .stage__info{display:contents}
  .stage__intro{order:0;padding-bottom:6px}
  .stage__media{order:1}
  .archive{order:2}
  /* chapters stack normally */
  .chapter{position:relative;top:auto;min-height:0}
  .chapter__inner{min-height:0;display:flex;flex-direction:column;gap:18px}
  .chapter__dim{display:none}
  .services{grid-template-columns:1fr}
  .svc{border-right:0;border-bottom:var(--line);padding:16px 0}
  .bespoke{grid-template-columns:1fr}
  .bespoke>div:nth-child(odd){border-right:0}
  .bespoke>div:nth-child(even){padding-left:0}
  .points li{grid-template-columns:1fr;gap:4px}
  .sec-head{display:flex;flex-direction:column;gap:10px}
  .sec-head__lead{margin-top:0}
  .step{display:grid;grid-template-columns:52px 1fr;row-gap:8px}
  .step__no{grid-column:1;grid-row:1}
  .step__t{grid-column:2}
  .step__d{grid-column:2}
  .step__img{grid-column:2;max-width:220px}
  .cats{grid-template-columns:1fr 1fr}
  .cat{min-height:120px}
  .cat:nth-child(4n){border-right:var(--line)}
  .cat:nth-child(2n){border-right:0;padding-left:12px}
  .cat:nth-child(2n+1){padding-left:0}
  .pgrid{display:flex;flex-direction:column;gap:28px}
  .pcard{margin:0!important}
  .pcard:nth-child(odd){width:86%}
  .pcard:nth-child(even){width:70%;align-self:flex-end}
  .qa{padding-left:0}
  .qa summary{font-size:18px}
  .contact__grid{display:flex;flex-direction:column;gap:30px}
  .form fieldset{grid-template-columns:1fr}
  .fld{grid-template-columns:1fr;gap:4px}
  .channels li{grid-template-columns:84px 1fr auto}
  .ftr{display:flex;flex-direction:column;align-items:flex-start}
  .ftr p:nth-child(4){text-align:left}
  .drawer{width:100%}
  .inspect{padding:var(--hdr) 10px 10px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}