:root {
  --bg: #06080f;
  --bg2: #0a0e1a;
  --card: rgba(255,255,255,.04);
  --border: rgba(120,160,255,.14);
  --text: #e8edf7;
  --muted: #8b96b3;
  --accent: #38bdf8;
  --accent2: #a78bfa;
  --green: #34d399;
  --red: #f87171;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  overflow-x:hidden;
  line-height:1.6;
}
::selection { background:rgba(56,189,248,.35); }

/* ---------- loader ---------- */
#loader {
  position:fixed; inset:0; z-index:999; background:var(--bg);
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:18px;
  transition:opacity .8s ease, visibility .8s;
}
#loader.hide { opacity:0; visibility:hidden; }
.loader-ring {
  width:54px; height:54px; border-radius:50%;
  border:2px solid rgba(56,189,248,.15); border-top-color:var(--accent);
  animation:spin 1s linear infinite;
}
@keyframes spin { to{ transform:rotate(360deg);} }
#loader p { color:var(--muted); font-size:13px; letter-spacing:4px; }

/* ---------- nav ---------- */
nav {
  position:fixed; top:0; left:0; right:0; z-index:100;
  display:flex; align-items:center; justify-content:space-between;
  padding:16px clamp(20px,5vw,64px);
  backdrop-filter:blur(16px); background:rgba(6,8,15,.55);
  border-bottom:1px solid var(--border);
}
.logo { display:flex; align-items:center; gap:10px; font-weight:700; letter-spacing:1px; font-size:15px; }
.logo .dot {
  width:10px; height:10px; border-radius:50%; background:var(--green);
  box-shadow:0 0 12px var(--green); animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse { 50%{ opacity:.4;} }
.nav-links { display:flex; gap:28px; }
.nav-links a { color:var(--muted); text-decoration:none; font-size:14px; transition:color .25s; }
.nav-links a:hover { color:var(--accent); }
@media (max-width:720px){ .nav-links{ display:none; } }

/* ---------- hero ---------- */
.hero {
  position:relative; height:100vh; min-height:640px;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  text-align:center; padding:0 20px;
}
#scene-canvas { position:absolute; inset:0; z-index:0; }
.hero::after {
  content:""; position:absolute; inset:auto 0 0 0; height:220px;
  background:linear-gradient(to top, var(--bg), transparent);
  z-index:1; pointer-events:none;
}
.hero-content { position:relative; z-index:2; max-width:900px; pointer-events:none; }
.hero-actions { pointer-events:auto; }
.badge {
  display:inline-flex; align-items:center; gap:8px;
  padding:7px 18px; border-radius:999px;
  border:1px solid rgba(52,211,153,.35); background:rgba(52,211,153,.08);
  color:var(--green); font-size:13px; letter-spacing:2px; margin-bottom:26px;
}
h1.title {
  font-size:clamp(34px,6.4vw,74px); font-weight:800; line-height:1.15; letter-spacing:2px;
  background:linear-gradient(120deg,#fff 30%,var(--accent) 65%,var(--accent2));
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent;
}
.subtitle { margin-top:18px; color:var(--muted); font-size:clamp(14px,1.8vw,19px); letter-spacing:1px; }
.subtitle b { color:var(--text); }
.hero-actions { margin-top:40px; display:flex; gap:16px; justify-content:center; flex-wrap:wrap; }
.btn {
  padding:13px 32px; border-radius:12px; font-size:15px; cursor:pointer;
  text-decoration:none; letter-spacing:1px;
  transition:transform .25s, box-shadow .25s, border-color .25s;
}
.btn-primary {
  background:linear-gradient(120deg,var(--accent),var(--accent2));
  color:#04121c; font-weight:700; border:none;
  box-shadow:0 8px 30px rgba(56,189,248,.35);
}
.btn-primary:hover { transform:translateY(-3px); box-shadow:0 14px 42px rgba(56,189,248,.5); }
.btn-ghost { border:1px solid var(--border); color:var(--text); background:rgba(255,255,255,.03); }
.btn-ghost:hover { transform:translateY(-3px); border-color:var(--accent); }
.scroll-hint {
  position:absolute; bottom:34px; left:50%; transform:translateX(-50%);
  color:var(--muted); font-size:12px; letter-spacing:3px; z-index:2;
  animation:bob 2s ease-in-out infinite;
}
@keyframes bob { 50%{ transform:translate(-50%,8px);} }

/* ---------- stats ---------- */
.stats {
  position:relative; z-index:2;
  display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  max-width:1100px; margin:-70px auto 0; padding:0 24px;
}
.stat { background:var(--bg2); border:1px solid var(--border); padding:28px 20px; text-align:center; }
.stat .num {
  font-size:clamp(28px,3.4vw,40px); font-weight:800;
  background:linear-gradient(120deg,var(--accent),var(--accent2));
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent;
}
.stat .label { color:var(--muted); font-size:13px; margin-top:6px; letter-spacing:2px; }

/* ---------- section base ---------- */
section.block { max-width:1160px; margin:0 auto; padding:110px 24px 0; }
.sec-tag {
  display:inline-block; color:var(--accent); font-size:13px; letter-spacing:4px;
  border:1px solid rgba(56,189,248,.3); padding:5px 14px; border-radius:999px; margin-bottom:18px;
}
h2.sec-title { font-size:clamp(26px,3.6vw,40px); font-weight:800; letter-spacing:1px; margin-bottom:14px; }
.sec-desc { color:var(--muted); max-width:760px; font-size:15px; }

/* ---------- architecture flow ---------- */
.arch-flow { margin-top:48px; display:flex; align-items:center; justify-content:center; flex-wrap:wrap; gap:14px; }
.flow-node {
  border:1px solid var(--border); background:var(--card);
  padding:16px 22px; border-radius:14px; text-align:center; min-width:130px;
  transition:transform .3s, border-color .3s;
}
.flow-node:hover { transform:translateY(-4px); border-color:var(--accent); }
.flow-node.core { border-color:rgba(56,189,248,.5); box-shadow:0 0 30px rgba(56,189,248,.15); }
.flow-node .icon { font-size:26px; }
.flow-node .name { font-size:14px; font-weight:600; margin-top:6px; }
.flow-node .sub { font-size:11px; color:var(--muted); margin-top:2px; }
.flow-arrow { color:var(--accent); font-size:20px; opacity:.7; }

/* ---------- module cards ---------- */
.grid { margin-top:48px; display:grid; grid-template-columns:repeat(auto-fit,minmax(300px,1fr)); gap:22px; }
.card {
  position:relative; overflow:hidden;
  border:1px solid var(--border); border-radius:18px; background:var(--card);
  padding:30px 26px;
  transition:transform .35s, border-color .35s, box-shadow .35s;
}
.card:hover {
  transform:translateY(-6px); border-color:rgba(56,189,248,.45);
  box-shadow:0 20px 50px rgba(0,0,0,.45);
}
.card-icon {
  width:52px; height:52px; border-radius:14px;
  display:flex; align-items:center; justify-content:center;
  font-size:26px; margin-bottom:18px;
  background:linear-gradient(135deg,rgba(56,189,248,.18),rgba(167,139,250,.18));
  border:1px solid var(--border);
}
.card h3 { font-size:17px; letter-spacing:1px; }
.card .tagline { font-size:12px; color:var(--accent); margin:4px 0 12px; letter-spacing:1px; }
.card p { font-size:13.5px; color:var(--muted); }
.metrics { margin-top:16px; display:flex; gap:10px; flex-wrap:wrap; }
.chip {
  font-size:11px; padding:4px 12px; border-radius:999px;
  border:1px solid var(--border); background:rgba(255,255,255,.04);
}
.chip.ok { color:var(--green); border-color:rgba(52,211,153,.4); }
.chip.warn { color:#fbbf24; border-color:rgba(251,191,36,.4); }
.chip.danger { color:var(--red); border-color:rgba(248,113,113,.4); }

/* ---------- media ---------- */
.media-wrap { margin-top:48px; display:grid; grid-template-columns:1.4fr 1fr; gap:22px; }
@media (max-width:880px){ .media-wrap{ grid-template-columns:1fr; } }
.video-card, .shot-card { border:1px solid var(--border); border-radius:18px; overflow:hidden; background:var(--card); }
.video-card video { width:100%; display:block; aspect-ratio:16/9; background:#000; object-fit:contain; }
.shot-card img { width:100%; display:block; aspect-ratio:16/9; object-fit:cover; transition:transform .5s; }
.shot-card:hover img { transform:scale(1.05); }
.media-caption { padding:14px 18px; font-size:13px; color:var(--muted); border-top:1px solid var(--border); }
.media-caption b { color:var(--text); }
.gallery { margin-top:22px; display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:22px; }

/* ---------- award ---------- */
.award-band { margin:120px auto 0; max-width:1160px; padding:0 24px; }
.award-inner {
  border:1px solid rgba(251,191,36,.35); border-radius:22px;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(251,191,36,.12), transparent 55%),
    radial-gradient(ellipse at 85% 100%, rgba(56,189,248,.12), transparent 55%),
    var(--bg2);
  padding:clamp(36px,6vw,64px);
  display:flex; align-items:center; gap:clamp(24px,5vw,56px); flex-wrap:wrap;
}
.medal { font-size:clamp(60px,9vw,104px); filter:drop-shadow(0 8px 30px rgba(251,191,36,.4)); }
.award-inner h2 { font-size:clamp(22px,3vw,32px); letter-spacing:1px; }
.award-inner p { color:var(--muted); margin-top:10px; max-width:680px; font-size:14.5px; }
.award-tags { margin-top:18px; display:flex; gap:10px; flex-wrap:wrap; }

/* ---------- footer ---------- */
footer { margin-top:120px; border-top:1px solid var(--border); padding:44px 24px 54px; text-align:center; }
footer .f-title { font-weight:700; letter-spacing:2px; }
footer .f-sub { color:var(--muted); font-size:13px; margin-top:10px; }
footer .stack { margin-top:18px; display:flex; justify-content:center; gap:10px; flex-wrap:wrap; }

/* ---------- reveal ---------- */
.reveal { opacity:0; transform:translateY(36px); transition:opacity .9s cubic-bezier(.2,.7,.2,1), transform .9s cubic-bezier(.2,.7,.2,1); }
.reveal.visible { opacity:1; transform:none; }