/* ============================================================
   senyao — DESIGN.md v3 implementation
   Quiet Premium Neutral (cool paper) + Terracotta accent
   One dark room per page (hero). taste-skill pre-flight clean.
   ============================================================ */

:root{
  --paper:#EDEAE2;
  --paper-dim:#E3DFD5;
  --ink:#141414;
  --rust:#9E4526;
  --obsidian:#0B0B0C;
  --frost:#F4F3EF;
  --frost-dim:rgba(244,243,239,.6);
  --hair-frost:rgba(244,243,239,.32);
  --hair-rust:rgba(244,243,239,.45);
  --hair-ink:rgba(20,20,20,.14);
  --hair-ink-strong:rgba(20,20,20,.24);
  --ph:#55544F;

  --font-poster:"Anton","Noto Sans SC","PingFang SC",sans-serif;
  --font-ghost:"Noto Serif SC","Songti SC",serif;
  --font-display:"Space Grotesk","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-body:"Space Grotesk","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-caption:"Noto Serif SC","Songti SC","SimSun",serif;

  --gap-section:clamp(84px,10vw,140px);
  --gutter:clamp(20px,4vw,72px);
  --content:1360px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button,input,select,textarea{font:inherit;color:inherit;border-radius:0;background:none}

::selection{background:var(--ink);color:var(--paper)}

/* ---------- type scales: whisper & shout ---------- */
.whisper{font-family:var(--font-caption);font-size:13.5px;line-height:1.5;color:inherit;opacity:.85}
.shout{
  font-family:var(--font-poster);
  font-weight:900;
  font-size:clamp(34px,5.1vw,66px);
  line-height:1.04;
  letter-spacing:0;
  text-transform:uppercase;
}
.h2{
  font-family:var(--font-poster);
  font-weight:900;
  font-size:clamp(26px,3.2vw,42px);
  line-height:1.08;
  text-transform:uppercase;
}
.h2 .whisper{display:block;text-transform:none;margin-top:10px;font-size:14px;opacity:.7}

/* inner pages: page title & section headlines stay below the homepage hero */
.page-hero .shout{font-size:clamp(28px,3.6vw,46px)}
h2.shout{font-size:clamp(24px,3vw,38px)}

/* ---------- layout ---------- */
.wrap{max-width:var(--content);margin:0 auto;padding:0 var(--gutter)}
.section{padding:var(--gap-section) 0}
.section.tight{padding:calc(var(--gap-section)*.62) 0}
.band-rust{background:var(--rust);color:var(--frost)}
.band-rust ::selection{background:var(--frost);color:var(--rust)}
.rule{border:none;border-top:1px solid var(--hair-ink)}

.cols{display:grid;gap:clamp(24px,4vw,64px)}
.cols-2{grid-template-columns:1fr 1fr}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-side{grid-template-columns:1fr 1.9fr;align-items:start}
@media(max-width:860px){
  .cols-2,.cols-3,.cols-side{grid-template-columns:1fr}
}

/* ---------- frame: every photo gets a hairline ---------- */
.frame{border:1px solid var(--hair-ink-strong)}
.frame.on-dark{border-color:var(--hair-frost)}
.frame img{width:100%;height:auto}
.figcap{margin-top:10px}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 var(--gutter);height:64px;
  color:var(--frost);
  transition:background .35s ease,color .35s ease,border-color .35s ease;
  border-bottom:1px solid transparent;
}
.nav:not(.solid){background:linear-gradient(to bottom,rgba(11,11,12,.34),rgba(11,11,12,0))}
.nav.solid{background:var(--paper);color:var(--ink);border-color:var(--hair-ink)}
.wordmark{display:flex;align-items:center}
.wordmark img{height:40px;width:auto;display:block}
.wordmark .logo-light{display:none}
.nav:not(.solid) .wordmark .logo-dark{display:none}
.nav:not(.solid) .wordmark .logo-light{display:block}
.nav-links{display:flex;align-items:center;gap:28px;font-size:14px}
.nav-links a{position:relative;padding:4px 0}
.nav-links a:not(.nav-cta)::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:currentColor;transition:width .3s ease;
}
.nav-links a:not(.nav-cta):hover::after{width:100%}
.nav-links a[aria-current="page"]::after{width:100%}
.nav-lang{font-family:var(--font-caption);font-size:14px;opacity:.75;padding:4px 2px}
.nav-lang:hover{opacity:1}
.nav-cta{border:1px solid currentColor;padding:8px 18px;font-family:var(--font-display);font-size:13px;white-space:nowrap}
.nav-cta:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.nav:not(.solid) .nav-cta:hover{background:var(--frost);color:var(--obsidian);border-color:var(--frost)}
.nav-burger{display:none;background:none;border:1px solid currentColor;width:40px;height:40px;cursor:pointer;position:relative;transition:transform .14s ease-out,background-color .2s ease,color .2s ease}
.nav-burger:active{transform:scale(.97)}
.nav-burger:focus-visible,.mobile-menu .close:focus-visible{outline:2px solid currentColor;outline-offset:4px}
.nav-burger span{position:absolute;left:10px;right:10px;height:1px;background:currentColor}
.nav-burger span:nth-child(1){top:15px}.nav-burger span:nth-child(2){top:23px}

.mobile-menu{
  position:fixed;inset:0;z-index:60;background:var(--paper);color:var(--ink);
  display:flex;flex-direction:column;justify-content:center;padding:0 var(--gutter);
  visibility:hidden;opacity:0;pointer-events:none;transform:translateY(-100%);transition:transform .35s cubic-bezier(.32,.72,0,1),opacity .2s ease,visibility 0s linear .35s;
}
.mobile-menu.open{visibility:visible;opacity:1;pointer-events:auto;transform:translateY(0);transition-delay:0s}
.mobile-menu a{font-family:var(--font-display);font-weight:500;font-size:clamp(30px,8vw,44px);padding:14px 0;border-bottom:1px solid var(--hair-ink)}
.mobile-menu .close{position:absolute;top:14px;right:var(--gutter);font-size:16px;cursor:pointer;background:none;border:none;padding:10px}

@media(max-width:960px){
  .nav-links{display:none}
  .nav-burger{display:block}
}

/* ---------- hero: image-as-canvas (the one dark room) ---------- */
.hero{
  background:var(--obsidian);color:var(--frost);
  min-height:100svh;display:flex;flex-direction:column;justify-content:flex-end;
  position:relative;overflow:hidden;
}
.hero-bg{position:absolute;inset:0}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity 1.4s ease}
.hero-slide.is-active{opacity:1}
.hero.reduced-motion .hero-slide,.hero.reduced-motion .hero-cap{transition:none}
.hero-slide img{width:100%;height:100%;object-fit:cover}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top,rgba(11,11,12,.72) 0%,rgba(11,11,12,.28) 38%,rgba(11,11,12,.1) 62%,rgba(11,11,12,.38) 100%);
}
.hero-cap{transition:opacity .35s ease}
.hero-cap.is-fading{opacity:0}
.hero-progress{
  position:absolute;right:var(--gutter);bottom:clamp(44px,7vh,88px);z-index:2;
  display:flex;gap:8px;
}
.hero-progress button{
  appearance:none;width:22px;height:18px;padding:0;border:none;border-top:1px solid rgba(244,243,239,.3);
  background:transparent;cursor:pointer;transition:transform .14s ease-out,border-color .4s ease;
}
.hero-progress button::before{content:"";display:block;height:1px;background:var(--frost);transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out}
.hero-progress button.is-active{border-color:rgba(244,243,239,.7)}
.hero-progress button.is-active::before{transform:scaleX(1)}
.hero-progress button:hover{transform:scaleY(1.12)}
.hero-progress button:focus-visible{outline:2px solid var(--frost);outline-offset:4px}
.hero-progress button:active{transform:scale(.96)}
.hero-ghost{
  position:absolute;top:16%;right:calc(var(--gutter)*.5);
  font-family:var(--font-ghost);font-weight:600;
  font-size:clamp(96px,12vw,190px);line-height:1;white-space:nowrap;
  color:transparent;-webkit-text-stroke:1px rgba(244,243,239,.10);
  user-select:none;pointer-events:none;z-index:1;
}
.hero-inner{
  position:relative;z-index:2;
  padding:0 var(--gutter) clamp(44px,7vh,88px);
  display:flex;flex-direction:column;gap:20px;max-width:980px;
}
.hero-eyebrow{font-family:var(--font-display);font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--frost-dim)}
.hero .shout{text-shadow:0 1px 30px rgba(11,11,12,.5)}
.hero-cap{font-family:var(--font-caption);font-size:14px;color:var(--frost-dim)}
.hero-cta{display:flex;align-items:center;gap:28px;flex-wrap:wrap;margin-top:8px}
.btn-bone{
  display:inline-block;background:var(--frost);color:var(--obsidian);border:1px solid var(--frost);
  font-family:var(--font-display);font-weight:500;font-size:15px;
  padding:14px 40px;white-space:nowrap;transition:background .25s,color .25s;
}
.btn-bone:hover{background:transparent;color:var(--frost)}
.hero .link-more{border-color:var(--frost)}
@media(max-width:860px){
  .hero{min-height:92svh}
  .hero-ghost{font-size:24vw;top:12%}
  .hero .shout{font-size:clamp(30px,8.4vw,44px)}
}

/* ---------- works grid ---------- */
.works-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(28px,3.4vw,48px)}
@media(max-width:1100px){.works-grid{grid-template-columns:1fr 1fr}}
@media(max-width:700px){.works-grid{grid-template-columns:1fr}}
.work-card{display:block}
.work-card:focus-visible{outline:2px solid var(--rust);outline-offset:6px}
.work-card .frame img{aspect-ratio:3/2;object-fit:cover;width:100%}
.work-card .meta{display:flex;justify-content:space-between;align-items:baseline;gap:16px;margin-top:12px}
.work-card .meta .name{font-family:var(--font-display);font-weight:500;font-size:19px}
.work-card .meta .name em{font-style:normal;display:block;font-family:var(--font-caption);font-weight:400;font-size:12.5px;opacity:.72;margin-top:2px}
.work-card .meta .info{font-family:var(--font-caption);font-size:13px;opacity:.7;text-align:right;white-space:nowrap}
.work-card .meta .name span{background-image:linear-gradient(currentColor,currentColor);background-size:0 1px;background-position:0 100%;background-repeat:no-repeat;transition:background-size .35s ease}
.work-card:hover .meta .name span{background-size:100% 1px}

/* ---------- featured asymmetric gallery (home) ---------- */
.feat-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:clamp(20px,2.6vw,40px)}
.feat-grid .work-card{grid-column:span 4}
.feat-grid .work-card.big{grid-column:span 8;grid-row:span 2;display:flex;flex-direction:column}
.feat-grid .work-card.big .frame{flex:1;display:flex}
.feat-grid .work-card.big .frame img{aspect-ratio:auto;height:100%;object-fit:cover;flex:1}
@media(max-width:900px){
  .feat-grid .work-card,.feat-grid .work-card.big{grid-column:span 12;grid-row:auto}
  .feat-grid .work-card.big .frame img{aspect-ratio:3/2}
}

/* ---------- studio 60/40 + side rail ---------- */
.studio{position:relative}
.studio-grid{display:grid;grid-template-columns:1.9fr 1fr;gap:clamp(24px,4vw,64px);align-items:stretch}
.studio-grid .frame{display:flex}
.studio-grid .frame img{height:100%;object-fit:cover;width:100%;aspect-ratio:auto}
.studio-txt{display:flex;flex-direction:column;justify-content:center;gap:20px;padding:clamp(8px,1.5vw,24px) 0}
.studio-txt .shout{font-size:clamp(24px,3vw,38px)}
.studio-txt p{max-width:44ch;font-size:15.5px}
.side-rail{
  position:absolute;right:14px;top:50%;transform:translateY(-50%);
  writing-mode:vertical-rl;font-family:var(--font-caption);font-size:12px;opacity:.55;
  letter-spacing:.06em;user-select:none;pointer-events:none;
}
@media(max-width:960px){
  .studio-grid{grid-template-columns:1fr}
  .studio-grid .frame img{aspect-ratio:4/3;height:auto}
  .side-rail{display:none}
}

/* ---------- filters ---------- */
.filters{display:flex;flex-wrap:wrap;gap:8px 26px;margin-bottom:clamp(32px,4vw,52px)}
.filters button{
  background:none;border:none;cursor:pointer;
  font-family:var(--font-caption);font-size:14.5px;padding:6px 0;
  border-bottom:1px solid transparent;opacity:.62;transition:opacity .18s ease,border-color .18s ease,transform .14s ease-out;
}
.filters button:hover{opacity:1}
.filters button:active{transform:scale(.98)}
.filters button:focus-visible{outline:2px solid var(--rust);outline-offset:5px}
.filters button.active{opacity:1;border-color:var(--ink)}
.filter-status{margin:-30px 0 30px;opacity:.58}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--hair-ink);border-bottom:1px solid var(--hair-ink)}
.stats .cell{padding:clamp(30px,4.4vw,60px) clamp(16px,3vw,40px)}
.stats .cell + .cell{border-left:1px solid var(--hair-ink)}
.stats .num{font-family:var(--font-poster);font-weight:900;font-size:clamp(36px,4.6vw,64px);line-height:1;text-transform:uppercase}
.stats .num sup{font-size:.4em;font-weight:400;margin-left:4px}
.stats .cap{margin-top:14px}
@media(max-width:760px){
  .stats{grid-template-columns:1fr}
  .stats .cell + .cell{border-left:none;border-top:1px solid var(--hair-ink)}
}

/* ---------- process: node line (home) ---------- */
.pline{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(20px,3vw,48px);border-top:1px solid var(--hair-ink);margin-top:clamp(48px,6vw,84px)}
.pnode{position:relative;padding-top:26px}
.pnode::before{content:"";position:absolute;top:-4.5px;left:0;width:8px;height:8px;background:var(--ink)}
.pnode .n{font-family:var(--font-poster);font-weight:900;font-size:20px;line-height:1}
.pnode h3{font-family:var(--font-display);font-weight:500;font-size:17px;margin:10px 0 6px}
.pnode p{font-size:13.5px;line-height:1.6;opacity:.78;max-width:26ch}
@media(max-width:760px){
  .pline{grid-template-columns:1fr 1fr;row-gap:36px}
}

/* ---------- process: step list (services) ---------- */
.steps{counter-reset:step}
.step{display:grid;grid-template-columns:110px 1fr;gap:clamp(16px,3vw,40px);padding:clamp(24px,3vw,40px) 0;border-top:1px solid var(--hair-ink)}
.step:last-child{border-bottom:1px solid var(--hair-ink)}
.step::before{counter-increment:step;content:"0" counter(step);font-family:var(--font-poster);font-weight:900;font-size:clamp(26px,3vw,40px);grid-column:1;line-height:1.1}
.step .body{grid-column:2}
.step h3{font-family:var(--font-display);font-weight:500;font-size:20px;margin-bottom:8px}
.step p{max-width:62ch;font-size:15px;line-height:1.75}
@media(max-width:640px){.step{grid-template-columns:1fr}.step::before{grid-column:1}.step .body{grid-column:1}}

/* ---------- inquiry band & form (rust) ---------- */
.inquiry{display:grid;grid-template-columns:1fr 1.35fr;gap:clamp(32px,5vw,88px)}
@media(max-width:860px){.inquiry{grid-template-columns:1fr}}
.inquiry .side .shout{font-size:clamp(28px,3.2vw,42px)}
.inquiry .contact-list{margin-top:36px;display:grid;gap:18px}
.inquiry .contact-list .row{border-top:1px solid var(--hair-rust);padding-top:12px;display:flex;gap:16px;font-size:14.5px}
.inquiry .contact-list .row b{font-weight:400;min-width:64px;font-family:var(--font-caption)}
.inquiry .contact-list .row span{font-family:var(--font-display);font-weight:500;font-size:15px}

.form{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form .full{grid-column:1/-1}
.field label{display:block;font-family:var(--font-caption);font-size:13px;margin-bottom:8px;color:var(--frost)}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--hair-ink-strong);background:var(--paper);color:var(--ink);
  padding:13px 14px;font-size:15px;line-height:1.5;
}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--ink) 50%),linear-gradient(135deg,var(--ink) 50%,transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 13px) 50%;background-size:5px 5px;background-repeat:no-repeat}
.field textarea{min-height:120px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--ink);outline-offset:1px}
.field input::placeholder,.field textarea::placeholder{color:var(--ph)}
.btn-solid{
  display:inline-block;background:var(--ink);color:var(--paper);border:1px solid var(--ink);
  font-family:var(--font-display);font-weight:500;font-size:15px;
  padding:15px 44px;cursor:pointer;white-space:nowrap;transition:background .25s,color .25s;
}
.btn-solid:hover{background:transparent;color:var(--ink)}
.btn-solid:active,.btn-bone:active,.nav-cta:active{transform:scale(.98)}
.btn-solid:focus-visible,.btn-bone:focus-visible,.nav-cta:focus-visible,.link-more:focus-visible{outline:2px solid currentColor;outline-offset:5px}
.band-rust .btn-solid{background:var(--obsidian);border-color:var(--obsidian);color:var(--frost)}
.band-rust .btn-solid:hover{background:var(--frost);border-color:var(--frost);color:var(--obsidian)}
.form-note{grid-column:1/-1;font-family:var(--font-caption);font-size:13px;opacity:.9}
.form-success{display:none;border:1px solid var(--frost);padding:26px 28px;font-size:15px;line-height:1.7}
.form-success.show{display:block}

/* ---------- footer (constant dark chrome) ---------- */
.footer{background:var(--obsidian);color:var(--frost);padding:clamp(48px,6vw,80px) 0 36px}
.footer ::selection{background:var(--frost);color:var(--obsidian)}
.footer .top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:clamp(24px,4vw,64px);padding-bottom:clamp(32px,4vw,56px);border-bottom:1px solid var(--hair-frost)}
@media(max-width:860px){.footer .top{grid-template-columns:1fr}}
.footer .wordmark img{height:64px}
.footer h4{font-family:var(--font-caption);font-size:13px;font-weight:400;margin-bottom:14px;opacity:.75}
.footer li{font-size:14px;margin:7px 0}
.footer .whisper{color:var(--frost-dim);opacity:1}
.footer a:hover{text-decoration:underline;text-underline-offset:4px}
.footer .bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;font-size:12.5px;font-family:var(--font-caption);opacity:.8}

/* ---------- case detail ---------- */
.case-hero{
  background:var(--obsidian);color:var(--frost);
  min-height:100svh;display:flex;flex-direction:column;justify-content:flex-end;
  position:relative;overflow:hidden;
}
.case-hero .hero-bg img{object-position:center}
.case-ghost{
  position:absolute;top:38%;left:50%;transform:translate(-50%,-50%);
  font-family:var(--font-ghost);font-weight:600;
  font-size:clamp(60px,7.5vw,110px);line-height:1;white-space:nowrap;
  color:transparent;-webkit-text-stroke:1px rgba(244,243,239,.09);
  user-select:none;pointer-events:none;z-index:1;
}
.case-hero-inner{position:relative;z-index:2;padding:0 var(--gutter) clamp(36px,6vh,72px)}
.case-hero .kicker{font-family:var(--font-caption);font-size:14px;color:var(--frost-dim);margin-bottom:14px}
.case-hero h1{font-family:var(--font-poster);font-weight:900;font-size:clamp(30px,4.6vw,56px);line-height:1.06;text-shadow:0 1px 26px rgba(11,11,12,.5)}
.case-hero .sub{font-family:var(--font-caption);font-size:clamp(15px,1.6vw,19px);color:var(--frost-dim);margin-top:14px}
.case-specs{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--hair-ink);border-bottom:1px solid var(--hair-ink)}
.case-specs .cell{padding:22px clamp(12px,2vw,28px)}
.case-specs .cell + .cell{border-left:1px solid var(--hair-ink)}
.case-specs .k{font-family:var(--font-caption);font-size:12.5px;opacity:.66;display:block;margin-bottom:6px}
.case-specs .v{font-family:var(--font-display);font-weight:500;font-size:16px}
@media(max-width:760px){
  .case-specs{grid-template-columns:1fr 1fr}
  .case-specs .cell:nth-child(3){border-left:none}
  .case-specs .cell:nth-child(n+3){border-top:1px solid var(--hair-ink)}
}
.case-body{padding:var(--gap-section) 0}
.case-body .lede{font-family:var(--font-caption);font-size:clamp(18px,2vw,23px);line-height:1.65;max-width:34ch}
.case-gallery{display:grid;gap:clamp(28px,4vw,56px);margin-top:clamp(40px,5vw,72px)}
.case-gallery .frame img{width:100%}
.case-nav{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--hair-ink)}
.case-nav a{padding:clamp(40px,6vw,72px) var(--gutter);display:flex;flex-direction:column;gap:10px}
.case-nav a + a{border-left:1px solid var(--hair-ink);text-align:right;align-items:flex-end}
.case-nav a:hover{background:var(--paper-dim)}
.case-nav .dir{font-family:var(--font-caption);font-size:13px;opacity:.66}
.case-nav .t{font-family:var(--font-display);font-weight:500;font-size:clamp(19px,2.4vw,28px)}

/* ---------- capabilities hairline list (about) ---------- */
.caps li{border-top:1px solid var(--hair-ink);padding:16px 0;font-family:var(--font-display);font-weight:500;font-size:clamp(16px,1.8vw,19px)}
.caps li:last-child{border-bottom:1px solid var(--hair-ink)}

/* ---------- full-bleed photo strip ---------- */
.photo-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:2px}
.photo-strip .ph img{width:100%;height:clamp(320px,60vh,620px);object-fit:cover}
.photo-caps{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;padding:12px var(--gutter) 0}
@media(max-width:760px){
  .photo-strip{grid-template-columns:1fr}
  .photo-strip .ph img{height:min(60vw,420px)}
  .photo-caps{grid-template-columns:1fr}
}

/* ---------- hero settle-in ---------- */
.hero-bg img{transform:scale(1.05);animation:heroZoom 2.6s cubic-bezier(.2,.6,.2,1) .1s forwards}
@keyframes heroZoom{to{transform:scale(1)}}
@media(prefers-reduced-motion:reduce){.hero-bg img{animation:none;transform:none}}

/* ---------- staggered card reveals ---------- */
.works-grid .reveal:nth-child(2),.feat-grid .reveal:nth-child(2){transition-delay:.07s}
.works-grid .reveal:nth-child(3),.feat-grid .reveal:nth-child(3){transition-delay:.14s}
.works-grid .reveal:nth-child(4),.feat-grid .reveal:nth-child(4){transition-delay:.07s}
.works-grid .reveal:nth-child(5),.feat-grid .reveal:nth-child(5){transition-delay:.14s}
.works-grid .reveal:nth-child(6),.feat-grid .reveal:nth-child(6){transition-delay:.21s}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- floating inquiry (mobile) ---------- */
.float-inquiry{
  display:none;position:fixed;right:18px;bottom:18px;z-index:45;
  width:52px;height:52px;background:var(--ink);color:var(--paper);
  border:none;cursor:pointer;align-items:center;justify-content:center;
}
.float-inquiry svg{width:22px;height:22px}
.float-inquiry:focus-visible{outline:2px solid var(--rust);outline-offset:4px}
@media(max-width:860px){.float-inquiry{display:flex}}

@media(max-width:640px){
  .nav{height:58px;padding-left:var(--gutter);padding-right:var(--gutter)}
  .wordmark{font-size:18px;gap:7px}
  .wordmark .cn{font-size:11px}
  .hero-inner{padding-bottom:36px;gap:16px}
  .hero-cta{gap:18px}
  .btn-bone,.btn-solid{padding:13px 24px}
  .form{grid-template-columns:1fr}
  .form .full{grid-column:1}
  .filter-status{margin:-20px 0 24px}
}

/* ---------- misc ---------- */
.whisper .tick{display:inline-block;width:10px;height:10px;background:var(--rust);margin-right:10px}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:clamp(28px,4vw,52px);flex-wrap:wrap}
.link-more{font-family:var(--font-display);font-size:14px;border-bottom:1px solid currentColor;padding-bottom:3px;white-space:nowrap}
.link-more:hover{opacity:.7}
.page-hero{padding:calc(64px + clamp(56px,9vw,120px)) 0 clamp(40px,6vw,72px)}
.page-hero + .section.tight{margin-top:-24px}
.page-hero .en{font-family:var(--font-caption);font-size:15px;opacity:.7;margin-top:10px}
.empty-note{font-family:var(--font-caption);opacity:.7;padding:40px 0}