/* ==========================================================================
   Fenghecheng AI Content Production Factory
   Dark tech aesthetic · no external dependencies
   ========================================================================== */

:root{
  --bg:#05070e;
  --bg-2:#080b16;
  --surface:rgba(255,255,255,.035);
  --surface-2:rgba(255,255,255,.06);
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.16);
  --text:#eaeef7;
  --muted:#8892a6;
  --muted-2:#6b7488;
  --c1:#22d3ee;
  --c2:#6366f1;
  --c3:#a855f7;
  --grad:linear-gradient(135deg,var(--c1) 0%,var(--c2) 52%,var(--c3) 100%);
  --grad-soft:linear-gradient(135deg,rgba(34,211,238,.16),rgba(99,102,241,.14) 52%,rgba(168,85,247,.14));
  --radius:18px;
  --radius-sm:12px;
  --maxw:1200px;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI Variable Display","Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--font);font-size:16px;line-height:1.62;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;font-weight:650;letter-spacing:-.022em;line-height:1.12}
p{margin:0}
::selection{background:rgba(99,102,241,.4)}

/* ---------- ambient background ---------- */
.bg-fx{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bg-fx .grid{
  position:absolute;inset:-2px;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 85% 60% at 50% 0%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 85% 60% at 50% 0%,#000 20%,transparent 78%);
}
.bg-fx .orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.bg-fx .orb.a{width:620px;height:620px;top:-260px;left:-140px;background:radial-gradient(circle,rgba(34,211,238,.55),transparent 68%)}
.bg-fx .orb.b{width:720px;height:720px;top:-320px;right:-200px;background:radial-gradient(circle,rgba(168,85,247,.5),transparent 68%)}
.bg-fx .orb.c{width:560px;height:560px;top:640px;left:36%;background:radial-gradient(circle,rgba(99,102,241,.32),transparent 70%)}
.bg-fx .noise{
  position:absolute;inset:0;opacity:.028;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}
main,header,footer{position:relative;z-index:1}

/* ---------- layout ---------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 26px}
.section{padding:86px 0;position:relative}
.section.tight{padding:62px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.19em;text-transform:uppercase;
  color:var(--muted);margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--grad);box-shadow:0 0 10px rgba(99,102,241,.9)}
.h2{font-size:clamp(28px,3.6vw,44px);margin-bottom:16px}
.lede{color:var(--muted);font-size:17px;max-width:70ch}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- nav ---------- */
header{position:sticky;top:0;z-index:60;transition:background .3s,border-color .3s,backdrop-filter .3s;
  border-bottom:1px solid transparent}
header.scrolled{background:rgba(5,7,14,.72);backdrop-filter:blur(18px) saturate(160%);-webkit-backdrop-filter:blur(18px) saturate(160%);border-bottom-color:var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px;gap:20px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand .mark{width:36px;height:36px;flex-shrink:0}
.brand .txt{display:flex;flex-direction:column;line-height:1.05}
.brand .txt b{font-size:15px;letter-spacing:.13em;font-weight:700}
.brand .txt span{font-family:var(--mono);font-size:8.6px;letter-spacing:.15em;color:var(--muted-2);text-transform:uppercase;margin-top:3px}
.nav-links{display:flex;gap:30px;align-items:center}
.nav-links a{font-size:14px;color:var(--muted);transition:color .2s;position:relative}
.nav-links a:hover{color:var(--text)}
.nav-links a::after{content:"";position:absolute;left:0;right:100%;bottom:-6px;height:1px;background:var(--grad);transition:right .28s}
.nav-links a:hover::after{right:0}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:12px 22px;border-radius:999px;font-size:14px;font-weight:600;
  border:1px solid var(--line-strong);background:var(--surface);color:var(--text);
  transition:transform .2s,border-color .2s,background .2s,box-shadow .3s;cursor:pointer;white-space:nowrap;
}
.btn:hover{transform:translateY(-1px);border-color:rgba(255,255,255,.3);background:var(--surface-2)}
.btn.primary{background:var(--grad);border-color:transparent;color:#04070f;box-shadow:0 10px 34px -12px rgba(99,102,241,.85)}
.btn.primary:hover{box-shadow:0 16px 42px -12px rgba(99,102,241,1)}
.btn.sm{padding:10px 18px;font-size:13px}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:10px;color:var(--text);width:42px;height:38px;font-size:18px;cursor:pointer}

/* ---------- hero ---------- */
.hero{padding:88px 0 0;position:relative}
.hero h1{font-size:clamp(36px,5.6vw,68px);letter-spacing:-.032em;max-width:20ch}
.hero .lede{margin-top:22px;font-size:18px;color:#a7b0c2}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.hero-meta{display:flex;gap:26px;flex-wrap:wrap;margin-top:30px;font-family:var(--mono);font-size:12px;color:var(--muted-2);letter-spacing:.06em}
.hero-meta span{display:flex;align-items:center;gap:7px}
.hero-meta i{width:5px;height:5px;border-radius:50%;background:var(--c1);box-shadow:0 0 8px var(--c1);font-style:normal}
.hero-visual{
  margin-top:56px;position:relative;border-radius:24px;overflow:hidden;
  border:1px solid var(--line);box-shadow:0 40px 120px -40px rgba(0,0,0,.9),0 0 0 1px rgba(255,255,255,.03) inset;
}
.hero-visual img{width:100%;aspect-ratio:16/9;height:clamp(300px,44vw,520px);object-fit:cover;opacity:.8}
.hero-visual .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,7,14,.25) 0%,rgba(5,7,14,.5) 45%,rgba(5,7,14,.96) 100%)}
.hero-visual .scan{position:absolute;inset:0;background:repeating-linear-gradient(180deg,rgba(255,255,255,.028) 0 1px,transparent 1px 4px);mix-blend-mode:overlay}
.hero-visual .tag{
  position:absolute;left:24px;bottom:22px;right:24px;display:flex;justify-content:space-between;
  align-items:flex-end;gap:20px;flex-wrap:wrap;
}
.hero-visual .tag .cap{font-size:13px;color:#c3cad8;max-width:52ch}
.hero-visual .tag .cap b{display:block;font-size:15px;color:#fff;margin-bottom:3px;letter-spacing:-.01em}
.hero-visual .badge{
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  padding:8px 14px;border-radius:999px;border:1px solid rgba(34,211,238,.35);
  background:rgba(34,211,238,.08);color:#9beaf7;backdrop-filter:blur(8px);
}

/* ---------- stat strip ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-top:64px}
.stat{background:linear-gradient(180deg,rgba(255,255,255,.028),rgba(255,255,255,.008));padding:28px 24px}
.stat .n{font-size:clamp(26px,3vw,38px);font-weight:680;letter-spacing:-.03em;display:flex;align-items:baseline;gap:3px}
.stat .n em{font-style:normal;font-size:.5em;color:var(--muted);font-weight:500;letter-spacing:0}
.stat .k{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted-2);margin-top:8px}

/* ---------- glass cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;transition:transform .3s,border-color .3s,background .3s;overflow:hidden;
}
.card::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;opacity:0;transition:opacity .3s;
  background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;
}
.card:hover{transform:translateY(-4px);background:var(--surface-2);border-color:transparent}
.card:hover::before{opacity:.75}
.card .ico{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:18px;
  background:var(--grad-soft);border:1px solid var(--line);font-size:19px;
}
.card h3{font-size:18px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14.6px}
.card ul{margin:14px 0 0;padding-left:18px;color:var(--muted);font-size:14.4px}
.card ul li{margin-bottom:6px}
.num-tag{position:absolute;top:22px;right:24px;font-family:var(--mono);font-size:11px;color:var(--muted-2);letter-spacing:.1em}

/* ---------- gallery ---------- */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.shot{position:relative;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--line);aspect-ratio:16/10;background:#0b0f1a}
.shot img{width:100%;height:100%;object-fit:cover;transition:transform .6s cubic-bezier(.2,.7,.2,1);opacity:.9}
.shot:hover img{transform:scale(1.06);opacity:1}
.shot figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:14px 15px 12px;font-size:12.4px;color:#cdd4e2;
  background:linear-gradient(180deg,transparent,rgba(4,6,12,.92));letter-spacing:.01em;
}

/* ---------- capacity table ---------- */
.table-wrap{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface)}
table{width:100%;border-collapse:collapse;font-size:14.4px}
th,td{padding:15px 20px;text-align:left;border-bottom:1px solid var(--line)}
th{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);background:rgba(255,255,255,.028);font-weight:500}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:rgba(255,255,255,.022)}
td.hi{color:#fff;font-weight:600;white-space:nowrap}
td .tagline{font-family:var(--mono);font-size:11px;padding:3px 9px;border-radius:999px;border:1px solid var(--line-strong);color:var(--muted);white-space:nowrap}

/* ---------- workflow ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;position:relative}
.flow::before{content:"";position:absolute;top:26px;left:6%;right:6%;height:1px;background:linear-gradient(90deg,transparent,var(--line-strong),transparent)}
.step{position:relative;text-align:left}
.step .dot{
  width:52px;height:52px;border-radius:16px;display:grid;place-items:center;font-family:var(--mono);font-size:14px;
  background:rgba(8,11,22,.92);border:1px solid var(--line-strong);margin-bottom:18px;position:relative;z-index:2;
}
.step:hover .dot{border-color:rgba(99,102,241,.6);box-shadow:0 0 26px -6px rgba(99,102,241,.7)}
.step h4{font-size:16px;margin-bottom:8px}
.step p{color:var(--muted);font-size:14px}
.step .who{font-family:var(--mono);font-size:11px;color:var(--muted-2);margin-top:10px;letter-spacing:.05em}

/* ---------- language marquee ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.chip{
  padding:9px 16px;border-radius:999px;border:1px solid var(--line);background:var(--surface);
  font-size:13.6px;color:#c8cfdd;transition:border-color .25s,color .25s,background .25s;
}
.chip:hover{border-color:rgba(34,211,238,.45);color:#fff;background:rgba(34,211,238,.07)}

/* ---------- package grid ---------- */
.pkg{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.pkg .item{border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px;background:var(--surface);transition:border-color .25s,transform .25s}
.pkg .item:hover{border-color:rgba(99,102,241,.45);transform:translateY(-3px)}
.pkg .item b{display:block;font-size:14.6px;margin-bottom:7px}
.pkg .item span{font-size:13.4px;color:var(--muted)}

/* ---------- models ---------- */
.model{border:1px solid var(--line);border-radius:var(--radius-sm);padding:24px;background:var(--surface);position:relative;overflow:hidden;transition:border-color .25s,transform .25s}
.model:hover{border-color:rgba(168,85,247,.45);transform:translateY(-3px)}
.model b{display:block;font-size:16.6px;margin-bottom:9px}
.model p{color:var(--muted);font-size:14.2px}
.model .for{font-family:var(--mono);font-size:11px;color:var(--muted-2);margin-top:14px;letter-spacing:.05em}

/* ---------- track record ---------- */
.track{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 40px}
.track .row{display:flex;gap:14px;align-items:flex-start;padding:16px 0;border-bottom:1px solid var(--line)}
.track .row .k{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--c1);min-width:132px;padding-top:3px}
.track .row .v{font-size:14.6px;color:#c8cfdd}

/* ---------- CTA ---------- */
.cta{
  position:relative;border-radius:26px;padding:56px;overflow:hidden;
  border:1px solid var(--line);background:linear-gradient(135deg,rgba(34,211,238,.09),rgba(99,102,241,.08) 50%,rgba(168,85,247,.09));
}
.cta::after{content:"";position:absolute;width:520px;height:520px;right:-160px;top:-220px;border-radius:50%;
  background:radial-gradient(circle,rgba(168,85,247,.32),transparent 66%);filter:blur(40px);pointer-events:none}
.cta h2{font-size:clamp(26px,3.4vw,40px);margin-bottom:14px;max-width:22ch}
.cta p{color:#b9c1d1;max-width:62ch}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.25fr .95fr;gap:22px}
.contact-card{border:1px solid var(--line);border-radius:var(--radius);padding:34px;background:var(--surface)}
.contact-card .who{font-size:21px;font-weight:650;letter-spacing:-.02em}
.contact-card .role{font-family:var(--mono);font-size:11.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--c1);margin-top:7px}
.contact-list{margin-top:26px;display:grid;gap:2px}
.contact-list a,.contact-list div{display:flex;justify-content:space-between;gap:18px;padding:14px 0;border-bottom:1px solid var(--line);font-size:14.6px}
.contact-list .lab{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted-2);padding-top:3px}
.contact-list .val{color:#dbe1ec;text-align:right;word-break:break-word}
.contact-list a:hover .val{color:var(--c1)}
.map{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface);display:flex;flex-direction:column}
.map .head{padding:20px 24px;border-bottom:1px solid var(--line);font-family:var(--mono);font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted)}
.map .body{padding:26px 24px;flex:1;display:flex;flex-direction:column;justify-content:center;gap:6px;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:34px 34px}
.map .addr{font-size:15px;color:#dbe1ec;line-height:1.6}
.map .sub{font-size:13.4px;color:var(--muted)}
.pin{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--c1);margin-bottom:10px}
.pin::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--c1);box-shadow:0 0 0 4px rgba(34,211,238,.16),0 0 12px var(--c1)}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);margin-top:84px;padding:52px 0 40px}
.foot{display:flex;justify-content:space-between;gap:34px;flex-wrap:wrap}
.foot .col{max-width:320px}
.foot .col h5{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted-2);margin:0 0 14px;font-weight:500}
.foot .col p,.foot .col a{font-size:13.6px;color:var(--muted);display:block;margin-bottom:7px}
.foot .col a:hover{color:var(--c1)}
.foot-bottom{margin-top:40px;padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:12.4px;color:var(--muted-2);font-family:var(--mono);letter-spacing:.04em}

/* ---------- reveal animation ---------- */
html.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .75s cubic-bezier(.2,.7,.2,1),transform .75s cubic-bezier(.2,.7,.2,1)}
html.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html.js .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .flow::before{display:none}
  .pkg{grid-template-columns:repeat(3,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:760px){
  .section{padding:72px 0}
  .nav-links{display:none;position:absolute;top:74px;left:0;right:0;background:rgba(6,9,17,.97);
    backdrop-filter:blur(18px);flex-direction:column;gap:0;padding:10px 26px 22px;border-bottom:1px solid var(--line)}
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 0;border-bottom:1px solid var(--line);width:100%;font-size:15px}
  .nav-toggle{display:block}
  .grid-3,.grid-2,.gallery,.track{grid-template-columns:1fr}
  .pkg{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:1fr 1fr}
  .cta{padding:34px 24px}
  .contact-card{padding:24px}
  .brand .txt span{display:none}
  table{font-size:13.4px}
  th,td{padding:12px 14px}
}
@media (max-width:460px){
  .stats,.pkg{grid-template-columns:1fr}
  .hero-cta .btn{width:100%}
}