:root{
  --ground:#EDF0F5;
  --paper:#FFFFFF;
  --ink:#0C1424;
  --muted:#46546B;
  --line:#D3D9E4;
  --cobalt:#2437F5;
  --cobalt-d:#1A28C4;
  --sun:#FFD23F;
  --tint:#E2E7F1;
  --font-d:"Bricolage Grotesque","Segoe UI",system-ui,sans-serif;
  --font-b:"Hanken Grotesk","Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --gut:clamp(20px,5vw,56px);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--ground);color:var(--ink);font:400 1.0625rem/1.65 var(--font-b);-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
h1,h2,h3{font-family:var(--font-d);font-weight:700;letter-spacing:-.025em;line-height:1.08;margin:0}
p{margin:0}
ul,ol,dl,dd{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid var(--cobalt);outline-offset:3px;border-radius:4px}
.dark :focus-visible{outline-color:var(--sun)}
.wrap{max-width:1200px;margin:0 auto;padding:0 var(--gut)}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(237,240,245,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font:800 1.35rem var(--font-d);letter-spacing:-.04em}
.nav{display:flex;gap:26px;margin-left:auto;font-weight:500;font-size:.98rem}
.nav a{text-decoration:none;color:var(--muted);padding:6px 0}
.nav a:hover{color:var(--ink)}
.lang{display:flex;background:var(--tint);border-radius:999px;padding:3px}
.lang button{font:600 .8rem var(--font-b);border:0;background:none;color:var(--muted);padding:5px 11px;border-radius:999px;cursor:pointer}
.lang button[aria-pressed="true"]{background:var(--ink);color:#fff}
.burger{display:none;width:42px;height:42px;border:0;background:none;cursor:pointer;position:relative}
.burger span{position:absolute;left:10px;right:10px;height:2px;background:var(--ink);transition:transform .2s,top .2s}
.burger span:first-child{top:16px}.burger span:last-child{top:25px}
.burger[aria-expanded="true"] span:first-child{top:20px;transform:rotate(45deg)}
.burger[aria-expanded="true"] span:last-child{top:20px;transform:rotate(-45deg)}

/* buttons */
.btn{display:inline-block;background:var(--cobalt);color:#fff;font:600 1rem var(--font-b);text-decoration:none;padding:14px 26px;border-radius:12px;border:2px solid var(--cobalt);cursor:pointer;transition:background .15s,transform .15s}
.btn:hover{background:var(--cobalt-d);border-color:var(--cobalt-d)}
.btn:active{transform:translateY(1px)}
.btn-sm{padding:9px 18px;font-size:.92rem;border-radius:10px}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;border-color:var(--ink)}

/* hero */
.hero{padding:clamp(40px,7vw,96px) 0 clamp(56px,8vw,110px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:clamp(32px,5vw,72px);align-items:center}
.hero h1{font-size:clamp(2.4rem,4.8vw,4.2rem);font-weight:800;letter-spacing:-.04em;line-height:1}
.lead{font-size:clamp(1.05rem,1.5vw,1.22rem);color:var(--muted);max-width:34em;margin-top:26px}
.actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.facts{margin-top:44px;display:grid;gap:10px;font-size:.98rem;color:var(--ink)}
.facts li{padding-left:22px;position:relative}
.facts li::before{content:"";position:absolute;left:0;top:.62em;width:10px;height:10px;border-radius:3px;background:var(--cobalt)}

.collage{position:relative;aspect-ratio:1/1.02}
.shot{margin:0;position:absolute;overflow:hidden;background:var(--paper)}
.shot img{width:100%;height:100%;object-fit:cover}
.shot-main{top:0;right:0;width:90%;height:62%;border-radius:18px;box-shadow:0 30px 60px -28px rgba(12,20,36,.55);display:flex;flex-direction:column}
.chrome{display:flex;align-items:center;gap:6px;padding:0 14px;height:34px;flex:none;background:var(--ink);color:#9AA6BC;font-size:.74rem}
.chrome i{width:9px;height:9px;border-radius:50%;background:#34415A}
.chrome span{margin-left:10px;background:#1B2742;border-radius:6px;padding:3px 12px}
.shot-main img{flex:1;min-height:0}
.shot-phone{left:0;bottom:6%;width:52%;aspect-ratio:4/3.1;border-radius:26px 26px 26px 6px;border:7px solid var(--ground);box-shadow:0 26px 50px -24px rgba(12,20,36,.6)}
.shot-wh{right:0;bottom:0;width:38%;aspect-ratio:1/1;border-radius:6px 26px 26px 26px;border:7px solid var(--ground)}
.chip{position:absolute;left:46%;top:56%;transform:translateX(-50%);display:flex;align-items:center;gap:9px;background:var(--paper);padding:9px 16px;border-radius:999px;font-weight:600;font-size:.86rem;box-shadow:0 14px 30px -14px rgba(12,20,36,.5);white-space:nowrap}
.chip b{width:9px;height:9px;border-radius:50%;background:#18B879;box-shadow:0 0 0 4px rgba(24,184,121,.22)}
.collage>*{animation:rise .8s cubic-bezier(.2,.7,.2,1) both}
.shot-phone{animation-delay:.15s}.shot-wh{animation-delay:.3s}.chip{animation-name:rise-chip;animation-delay:.5s}
@keyframes rise{from{opacity:0;transform:translateY(28px)}}
@keyframes rise-chip{from{opacity:0;transform:translate(-50%,16px)}}

/* sections */
.sec{padding:clamp(64px,9vw,120px) 0}
.sec-head{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:24px 56px;align-items:end;margin-bottom:clamp(36px,5vw,64px)}
.sec h2{font-size:clamp(2rem,4.2vw,3.4rem);font-weight:800;letter-spacing:-.035em}
.sec-head p{color:var(--muted);max-width:30em}
.dark{background:var(--ink);color:#fff}
.dark .sec-head p,.dark .cap p{color:#A7B3C8}
.tint{background:var(--tint)}

/* services */
.row{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:12px 56px;padding:30px 0;border-top:1px solid var(--line)}
.row:last-child{border-bottom:1px solid var(--line)}
.row h3{font-size:clamp(1.5rem,2.6vw,2.1rem)}
.row p:first-child{max-width:32em}
.tags{margin-top:12px;font-size:.9rem;color:var(--cobalt);font-weight:600}

/* work */
.work{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(28px,4vw,48px) 28px}
.s7{grid-column:span 7}.s5{grid-column:span 5}.s6{grid-column:span 6}
.ph{overflow:hidden;border-radius:16px;aspect-ratio:16/10;background:#16213A}
.ph img{width:100%;height:100%;object-fit:cover;transition:transform .6s cubic-bezier(.2,.7,.2,1)}
.proj:hover .ph img{transform:scale(1.04)}
.cap{display:grid;grid-template-columns:1fr auto;gap:4px 16px;padding-top:16px;align-items:baseline}
.cap h3{font-size:1.4rem}
.cap span{font-size:.86rem;color:var(--sun);font-weight:600}
.cap p{grid-column:1/-1;max-width:34em}

/* process */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:36px;position:relative}
.steps li{position:relative;padding-top:20px;border-top:3px solid var(--ink)}
.n{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--ink);color:#fff;font:700 .95rem var(--font-d);position:absolute;top:-18px;left:0}
.steps h3{font-size:1.45rem;margin:22px 0 10px}
.steps p{color:var(--muted);font-size:1rem}

/* why */
.why{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px}
.why h3{font-size:1.5rem;margin-bottom:10px}
.why p{color:var(--muted)}

/* stack */
.stack div{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:8px 56px;padding:20px 0;border-top:1px solid var(--line)}
.stack div:last-child{border-bottom:1px solid var(--line)}
.stack dt{font:700 1.3rem var(--font-d);letter-spacing:-.02em}
.stack dd{color:var(--muted)}

/* contact */
.contact{background:var(--paper)}
.contact-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(32px,6vw,88px);align-items:start}
.mail{margin-top:30px;font:700 clamp(1.3rem,2.4vw,1.8rem) var(--font-d);letter-spacing:-.02em}
.mail a{color:var(--cobalt);text-decoration-thickness:2px;text-underline-offset:5px}
form{display:grid;gap:18px}
label span{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px}
input,textarea{width:100%;font:inherit;color:var(--ink);background:var(--ground);border:2px solid transparent;border-radius:12px;padding:13px 16px}
input:focus,textarea:focus{outline:none;border-color:var(--cobalt);background:#fff}
input[aria-invalid="true"],textarea[aria-invalid="true"]{border-color:#C8321F}
textarea{resize:vertical}
form .btn{justify-self:start}
.hint{font-size:.88rem;color:var(--muted)}
.hint.err{color:#C8321F;font-weight:600}

/* footer */
.site-footer{background:var(--ink);color:#A7B3C8;padding:28px 0;font-size:.92rem}
.foot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px}
.site-footer a{text-decoration-color:#46546B;text-underline-offset:4px}

/* responsive */
@media (max-width:960px){
  .hero-grid,.contact-grid,.sec-head,.row,.stack div{grid-template-columns:1fr}
  .sec-head{align-items:start}
  .collage{max-width:560px;width:100%}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:48px}
  .why{grid-template-columns:1fr;gap:28px}
  .s7,.s5,.s6{grid-column:1/-1}
}
@media (max-width:820px){
  .burger{display:block;margin-left:auto}
  .head-cta{display:none}
  .lang{margin-left:auto}
  .burger{margin-left:0}
  .nav{position:absolute;top:68px;left:0;right:0;flex-direction:column;gap:0;margin:0;background:var(--ground);border-bottom:1px solid var(--line);padding:8px var(--gut) 16px;display:none}
  .nav.open{display:flex}
  .nav a{padding:14px 0;border-bottom:1px solid var(--line);color:var(--ink);font-size:1.05rem}
}
@media (max-width:560px){
  .steps{grid-template-columns:1fr}
  .chip{font-size:.78rem;padding:7px 12px}
  .shot-phone,.shot-wh{border-width:5px}
  .actions .btn{flex:1;text-align:center}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .collage>*{animation:none}
  .ph img{transition:none}
}