:root{
  --bg: #fff;
  --bg2: #f9f9f9;
  --text: #111;
  --muted: rgba(0,0,0,.68);
  --muted2: rgba(0,0,0,.52);
  --line: rgba(0,0,0,.1);
  --line2: rgba(0,0,0,.05);
  --max: 1200px;
  --ease: cubic-bezier(.2,.8,.2,1);
}

 *{box-sizing:border-box}
 html,body{height:100%}
 body{
  margin:0;
  color:var(--text);
  background:var(--bg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  line-height:1.45;
  letter-spacing:.01em;
}

 main{display:block}

 /* Prevent fixed header from covering anchor targets */
 section[id]{scroll-margin-top:92px}

 ::selection{background:rgba(0,0,0,.1)}

a{color:inherit; text-decoration:none}
a:focus-visible{outline:2px solid rgba(0,0,0,.85); outline-offset:3px}

.container{max-width:var(--max); margin:0 auto; padding:0 22px}

.skip-link{
  position:absolute; left:-999px; top:8px;
  padding:10px 12px;
  background:rgba(255,255,255,.85);
  border:1px solid var(--line);
  color: #000;
}
.skip-link:focus{left:12px; z-index:9999}

.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:50;
  background:linear-gradient(180deg, rgba(255,255,255,.78), rgba(255,255,255,.22));
  backdrop-filter:saturate(150%) blur(12px);
  border-bottom:1px solid rgba(0,0,0,.0);
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:74px;
  gap:14px;
}

.brand{display:flex; align-items:center; gap:12px}
.brand-text{display:flex; flex-direction:column; line-height:1.05}
.brand-title{font-weight:800; letter-spacing:.26em; font-size:14px}
.brand-sub{font-size:10px; color:var(--muted2); letter-spacing:.22em}

.nav{
  display:flex;
  gap:18px;
  align-items:center;
}
.nav a{
  padding:10px 6px;
  color:rgba(0,0,0,.72);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  border-bottom:1px solid rgba(0,0,0,.0);
  transition:border-color .2s var(--ease), color .2s var(--ease);
}
.nav a:hover{color:rgba(0,0,0,.98); border-bottom-color:rgba(0,0,0,.6)}
.nav a.active{color:rgba(0,0,0,.98); border-bottom-color:rgba(0,0,0,.98)}

.nav-toggle{
  display:none;
  width:44px; height:44px;
  border-radius:0;
  border:1px solid rgba(0,0,0,.25);
  background:transparent;
  color:var(--text);
}
.nav-toggle-lines{
  display:block;
  width:18px; height:12px;
  margin:0 auto;
  background:
    linear-gradient(var(--text),var(--text)) 0 0/100% 2px no-repeat,
    linear-gradient(var(--text),var(--text)) 0 50%/100% 2px no-repeat,
    linear-gradient(var(--text),var(--text)) 0 100%/100% 2px no-repeat;
  opacity:.9;
 }

.hero{
  position:relative;
  min-height:95vh;
  display:flex;
  align-items:flex-end;
  padding:140px 0 120px;
  overflow:hidden;
}
.hero-inner{
  width:100%;
  position: relative; /* Ensure it's on top of the background */
  z-index: 1;
}
.hero-copy{max-width:62ch}
.eyebrow{color:rgba(0,0,0,.86); letter-spacing:.28em; text-transform:uppercase; font-size:12px; margin:0 0 14px}
.hero-title{font-size:56px; line-height:1.04; margin:0 0 16px; letter-spacing:.01em}
.hero-desc{max-width:62ch; color:var(--muted); margin:0 0 22px; font-size:16px}
.hero-actions{display:flex; gap:14px; align-items:center; margin:0 0 26px}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:14px 18px;
  border-radius:0;
  border:1px solid rgba(0,0,0,.92);
  background:transparent;
  color:rgba(0,0,0,.98);
  font-weight:750;
  letter-spacing:.16em;
  text-transform:uppercase;
  font-size:12px;
  transition:transform .18s var(--ease), background .18s var(--ease), color .18s var(--ease);
}
.btn:hover{transform:translateY(-1px); background:rgba(0,0,0,.98); color:#fff}
.btn:active{transform:translateY(0)}
.btn-primary{background:rgba(0,0,0,.98); color:#fff}
.btn-primary:hover{background:rgba(0,0,0,.88)}
.btn-ghost{border-color:rgba(0,0,0,.86)}

.hero-metrics{display:grid; grid-template-columns:repeat(3, minmax(0, 1fr)); gap:18px; max-width:720px}
.metric{padding:14px 0; border-top:1px solid rgba(0,0,0,.25)}
.metric-value{font-weight:820; letter-spacing:.08em; font-size:14px}
.metric-label{color:var(--muted2); font-size:11px; margin-top:6px; letter-spacing:.22em}

.panel-bg{
  position:absolute;
  inset:0;
  z-index:-1;
}


.panel-bg--hero {
  background: linear-gradient(180deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.8) 85%), url('../img/hero-background.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0;
  animation: fadeInBg 1.5s 0.8s ease-out forwards;
}

.panel-bg--about{
  background:
    linear-gradient(180deg, rgba(0,0,0,.45), rgba(0,0,0,.85)),
    linear-gradient(0deg, rgba(0,0,0,.70), rgba(0,0,0,.35)),
    radial-gradient(1000px 520px at 15% 25%, rgba(255,255,255,.10), transparent 60%),
    linear-gradient(180deg, #0d0d0d, #000);
}

.panel-bg--services{
  background:
    linear-gradient(180deg, rgba(0,0,0,.45), rgba(0,0,0,.85)),
    linear-gradient(0deg, rgba(0,0,0,.74), rgba(0,0,0,.40)),
    radial-gradient(900px 460px at 85% 20%, rgba(255,255,255,.10), transparent 58%),
    linear-gradient(180deg, #0c0c0c, #000);
}

.panel-bg--achievements{
  background:
    linear-gradient(180deg, rgba(0,0,0,.45), rgba(0,0,0,.85)),
    linear-gradient(0deg, rgba(0,0,0,.78), rgba(0,0,0,.45)),
    radial-gradient(1100px 520px at 35% 30%, rgba(255,255,255,.10), transparent 62%),
    linear-gradient(180deg, #0b0b0b, #000);
}


.panel-bg--contact{
  background:
    linear-gradient(180deg, rgba(0,0,0,.45), rgba(0,0,0,.85)),
    linear-gradient(0deg, rgba(0,0,0,.82), rgba(0,0,0,.50)),
    radial-gradient(900px 420px at 20% 30%, rgba(255,255,255,.10), transparent 62%),
    linear-gradient(180deg, #0b0b0b, #000);
}

.scroll-cue{
  position:absolute;
  left:50%;
  bottom:26px;
  transform:translateX(-50%);
  width:2px;
  height:44px;
  opacity:.9;
  z-index:2;
  pointer-events:none;
}

.scroll-cue-line{
  width:2px;
  height:44px;
  background:linear-gradient(180deg, rgba(0,0,0,.65), rgba(0,0,0,.0));
  transform-origin:top;
  animation:scrollCue 1.8s ease-in-out infinite;
}

@keyframes scrollCue{
  0%{transform:scaleY(.25); opacity:.35}
  45%{transform:scaleY(1); opacity:1}
  100%{transform:scaleY(.25); opacity:.35}
}

.section{
  position:relative;
  padding:120px 0;
  border-top:1px solid var(--line2);
  background-color: var(--bg2);
}

.section-head{margin-bottom:28px}
.section-head h2{
  font-size:34px;
  margin:0 0 10px;
  letter-spacing:.08em;
  text-transform:uppercase;
}
.section-head p{margin:0; color:var(--muted); max-width:78ch; font-size:14px}

.grid-2{display:grid; grid-template-columns:repeat(2, minmax(0, 1fr)); gap:26px}
.grid-4{display:grid; grid-template-columns:repeat(4, minmax(0, 1fr)); gap:26px}

.card{
  border-radius:0;
  border:1px solid var(--line);
  background:var(--bg);
  padding:22px;
}
.card h3{margin:0 0 10px; font-size:14px; letter-spacing:.16em; text-transform:uppercase}
.card p{margin:0 0 12px; color:rgba(0,0,0,.82); font-size:14px}

.tags{display:flex; flex-wrap:wrap; gap:10px}
.tag{
  padding:10px 10px;
  border-radius:0;
  border:1px solid var(--line2);
  background:transparent;
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:rgba(0,0,0,.78)
}

.kv{margin:0}
.kv-row{display:flex; gap:12px; padding:14px 0; border-bottom:1px solid var(--line2)}
.kv-row:last-child{border-bottom:none}
.kv dt{width:96px; color:var(--muted2); letter-spacing:.10em}
.kv dd{margin:0; color:rgba(0,0,0,.92)}
.kv a{color:rgba(0,0,0,.98); border-bottom:1px solid rgba(0,0,0,.55)}
.kv a:hover{border-bottom-color:rgba(0,0,0,.95)}

.service-meta{color:var(--muted2); font-size:11px; letter-spacing:.10em; text-transform:uppercase}

.callout{
  margin-top:26px;
  border-radius:0;
  border:1px solid rgba(0,0,0,.12);
  background:rgba(0,0,0,.03);
  padding:18px 22px;
}
.callout-title{font-weight:820; letter-spacing:.18em; margin-bottom:8px; text-transform:uppercase; font-size:12px}
.callout-body{color:rgba(0,0,0,.86); font-size:14px}

.stack{display:flex; flex-direction:column; gap:12px}
.accordion{
  border-radius:0;
  border:1px solid var(--line);
  background:var(--bg);
  padding:12px 14px;
}
.accordion summary{
  cursor:pointer;
  list-style:none;
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:10px;
  padding:8px 4px;
}
.accordion summary::-webkit-details-marker{display:none}
.acc-title{font-weight:820; letter-spacing:.18em; text-transform:uppercase; font-size:12px}
.acc-sub{color:var(--muted2); font-size:11px; letter-spacing:.10em; text-transform:uppercase}

.list{margin:12px 0 10px; padding-left:18px; color:rgba(0,0,0,.88)}
.list li{margin:8px 0}

.download .hint{margin-top:12px}
.hint{color:var(--muted2); font-size:12px; margin:0}
.mini-note{color:var(--muted2); font-size:13px; margin-top:12px}
.muted{color:var(--muted)}

.form{display:flex; flex-direction:column; gap:14px}
label span{display:block; color:var(--muted2); font-size:11px; margin:0 0 8px; letter-spacing:.18em; text-transform:uppercase}
input, textarea{
  width:100%;
  padding:14px 14px;
  border-radius:0;
  border:1px solid var(--line);
  background:rgba(255,255,255,.8);
  color:var(--text);
  outline:none;
}
input:focus, textarea:focus{border-color:rgba(0,0,0,.55); box-shadow:none}

.site-footer{
  padding:34px 0 54px;
  border-top:1px solid var(--line2);
  background:var(--bg2);
}
.footer-inner{display:flex; align-items:flex-start; justify-content:space-between; gap:12px}
.footer-brand{font-weight:820; letter-spacing:.16em; text-transform:uppercase}
.footer-meta{margin-top:10px; color:var(--muted2); font-size:12px; letter-spacing:.08em}
.sep{margin:0 8px}
.footer-link{color:rgba(0,0,0,.95); border-bottom:1px solid rgba(0,0,0,.6)}
.footer-link:hover{border-bottom-color:rgba(0,0,0,.95)}

.back-to-top{
  position:fixed;
  right:18px;
  bottom:18px;
  width:48px;
  height:48px;
  border-radius:0;
  border:1px solid rgba(0,0,0,.85);
  background:rgba(255,255,255,.35);
  color:var(--text);
  display:none;
  place-items:center;
  transition:background .18s var(--ease), transform .18s var(--ease);
}
.back-to-top:hover{background:rgba(0,0,0,.98); color:#fff; transform:translateY(-1px)}
.back-to-top.show{display:grid}

@media (max-width: 980px){
  .hero-title{font-size:46px}
  .grid-4{grid-template-columns:repeat(2, minmax(0, 1fr))}
}

@media (max-width: 720px){
  .nav-toggle{display:inline-flex; align-items:center; justify-content:center}
  .nav{
    position:fixed;
    inset:74px 12px auto 12px;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:8px;
    padding:14px;
    border-radius:0;
    border:1px solid rgba(255,255,255,.22);
    background:rgba(255,255,255,.92);
  }
  .nav.open{display:flex}
  .nav a{padding:12px 12px; font-size:13px; border-bottom-color:rgba(0,0,0,.0)}

  .grid-2{grid-template-columns:1fr}
  .grid-4{grid-template-columns:1fr}
  .hero{padding:120px 0 72px}
  .hero-title{font-size:38px}
  .hero-metrics{grid-template-columns:1fr}
  .section{padding:92px 0}
  .footer-inner{flex-direction:column}
}

/* Preloader */
.preloader {
  position: fixed;
  inset: 0;
  background-color: #fff;
  z-index: 9999;
  display: grid;
  place-items: center;
  transition: opacity 0.6s ease-in-out, visibility 0.6s ease-in-out;
}

.preloader.loaded {
  opacity: 0;
  visibility: hidden;
}

.preloader-logo {
  display: flex;
  gap: 10px;
  font-size: 48px;
  font-weight: 800;
  letter-spacing: 0.2em;
}

.preloader-char {
  opacity: 0;
  transform: scale(0.8);
  animation: fadeInChar 0.8s forwards;
  animation-delay: var(--delay);
}

@keyframes fadeInChar {
  to {
    opacity: 1;
    transform: scale(1);
  }
}

body.loading > *:not(.preloader) {
  opacity: 0;
}

body.loaded > *:not(.preloader) {
  animation: fadeInContent 0.8s 0.4s forwards;
}

@keyframes fadeInContent {
  to {
    opacity: 1;
  }
}

@keyframes fadeInBg {
  to {
    opacity: 1;
  }
}