:root{
  --bg:#0b0f14; --surface:#101620; --card:#141b26; --primary:#6ac1ff; --accent:#8ef0c6; --text:#e8eef7; --muted:#aebbd1; --line:#203043;
  --shadow:0 6px 20px rgba(0,0,0,.35); --radius:16px; --radius-lg:24px; --maxw:1200px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:radial-gradient(1200px 600px at 10% -10%, #123 0%, var(--bg) 55%), var(--bg);color:var(--text);
  font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft Yahei",sans-serif}
img{max-width:100%;display:block}
a{color:var(--text);text-decoration:none}
a:focus-visible,button:focus-visible{outline:2px dashed var(--primary);outline-offset:2px}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* Header / Nav */
header{position:sticky;top:0;z-index:20;background:linear-gradient(#0b0f14cc,#0b0f14cc);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.brand{display:flex;align-items:center;gap:.75rem}
.brand .logo{width:36px;height:36px;border-radius:10px;background:conic-gradient(from 210deg at 50% 50%, #76d0ff, #8ef0c6, #76d0ff);box-shadow:0 0 0 4px #0e1622}
.brand .name{font-weight:800;letter-spacing:.5px}
.menu{display:flex;gap:1rem;flex-wrap:wrap}
.menu a{padding:.6rem .9rem;border-radius:10px;color:var(--muted)}
.menu a:hover,.menu a[aria-current="page"]{background:#0f1722;color:var(--text)}

/* Common Text */
.section{padding:56px 0;border-top:1px solid var(--line)}
h1{font-size:clamp(26px,4.2vw,40px);margin:0 0 .6rem}
h2{font-size:clamp(22px,3.2vw,32px);margin:0 0 .5rem}
h3{margin:.2rem 0 .6rem}
.sub{color:var(--muted)}
.tag{display:inline-flex;align-items:center;gap:.5rem;border:1px solid #29445e;color:var(--muted);padding:.35rem .7rem;border-radius:999px;font-size:.85rem}
.badge{display:inline-flex;align-items:center;gap:.4rem;border:1px solid #2a4763;color:var(--muted);padding:.25rem .55rem;border-radius:999px;font-size:.8rem}

/* Cards / Panels */
.card, .panel, .pane, .tile, .case, .story, .kpi, .chart{background:linear-gradient(180deg,var(--card),#0f1823);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.card, .tile, .case, .story, .kpi, .chart{padding:18px}
.panel{padding:18px;border-radius:var(--radius-lg);background:linear-gradient(180deg,#0f1722,#0c131d)}
.mock{border:1px solid #22364d;border-radius:14px;overflow:hidden;background:linear-gradient(135deg,#17314a,#0f2032 55%,#17314a)}

/* Layout grids */
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:18px;margin-top:18px}
.gallery{display:grid;grid-template-columns:repeat(12,1fr);gap:18px;margin-top:18px}
.gallery .pane{grid-column:span 6}
.team{display:grid;grid-template-columns:repeat(12,1fr);gap:18px;margin-top:18px}
.story-grid,.press{display:grid;grid-template-columns:repeat(12,1fr);gap:18px;margin-top:18px}
.board,.charts,.cases{display:grid;grid-template-columns:repeat(12,1fr);gap:18px;margin-top:18px}
.timeline,.flow{display:grid;gap:14px;margin-top:16px}
.timeline{grid-template-columns:repeat(6,1fr)}
.flow{grid-template-columns:repeat(5,1fr)}
.cols{display:grid;grid-template-columns:1.1fr 1fr;gap:18px}

/* Reusable items */
.list{display:grid;gap:10px;padding:12px}
.item{display:flex;align-items:center;gap:12px;background:#0e1b29;border:1px solid #274059;border-radius:12px;padding:12px}
.avatar{width:36px;height:36px;border-radius:10px;background:#0f2638;border:1px solid #274059;display:grid;place-items:center}
.row{display:flex;gap:10px;flex-wrap:wrap}
.pill{background:#0f2638;border:1px solid #274059;border-radius:999px;padding:.35rem .7rem}

/* Buttons */
.btn{display:inline-flex;gap:.6rem;align-items:center;justify-content:center;padding:.7rem 1rem;border-radius:999px;border:1px solid #2a3f55;font-weight:600;color:var(--text);background:transparent;cursor:pointer}
.btn:hover{background:#0f1722}
.btn-primary{background:linear-gradient(135deg,var(--primary),#7fd3ff);color:#00111f;border-color:transparent}
.btn-primary:hover{filter:brightness(1.03)}

/* KPI small cards */
.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;padding:12px}
.kpi .val{font-size:1.4rem;font-weight:800}

/* Numbered step */
.step{background:linear-gradient(180deg,var(--card),#0f1823);border:1px solid var(--line);border-radius:14px;padding:14px;text-align:center}
.num{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:#0f2638;border:1px solid #28425a;color:var(--primary);font-weight:700;margin-bottom:.4rem}

/* Charts (CSS only placeholders) */
.canvas{height:260px;border:1px solid #22364d;border-radius:12px;background:repeating-linear-gradient(180deg,#0f1b2a,#0f1b2a 8px,#0d1724 8px,#0d1724 16px);position:relative;overflow:hidden}
.bar{position:absolute;bottom:0;width:38px;background:linear-gradient(135deg,var(--primary),#7fd3ff);border-radius:8px 8px 0 0;opacity:.9}
.bar.mint{background:linear-gradient(135deg,var(--accent),#b6ffd7)}
.xlab{position:absolute;bottom:6px;left:0;right:0;display:flex;justify-content:space-around;color:var(--muted);font-size:.85rem}

/* Footer */
footer{padding:30px 0 40px;color:var(--muted)}
.footgrid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:18px}
.copyright{margin-top:18px;border-top:1px solid var(--line);padding-top:18px;text-align:center}

/* Utilities */
.hide{display:none !important}
.center{display:grid;place-items:center}
.round-lg{border-radius:var(--radius-lg)}
.mt-0{margin-top:0}.mt-1{margin-top:.25rem}.mt-2{margin-top:.5rem}.mt-3{margin-top:1rem}
.mb-0{margin-bottom:0}.mb-1{margin-bottom:.25rem}.mb-2{margin-bottom:.5rem}.mb-3{margin-bottom:1rem}

/* Responsive */
@media (max-width:1200px){
  .kpi{grid-column:span 3}
  .chart{grid-column:span 6}
}
@media (max-width:1024px){
  .gallery .pane{grid-column:span 12}
  .cols{grid-template-columns:1fr}
  .timeline{grid-template-columns:repeat(3,1fr)}
  .flow{grid-template-columns:repeat(3,1fr)}
  .kpi{grid-column:span 6}
  .chart{grid-column:span 12}
  .case,.tile,.story{grid-column:span 12}
  .press .press-item{grid-column:span 6}
}
@media (max-width:720px){
  .menu{display:none}
  .flow{grid-template-columns:repeat(2,1fr)}
  .press .press-item{grid-column:span 12}
}

/* High-contrast / prefers-reduced-motion */
@media (prefers-contrast:more){
  .menu a:hover,.menu a[aria-current="page"]{outline:1px solid var(--primary)}
  .btn-primary{box-shadow:0 0 0 2px #0a1a28 inset}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;scroll-behavior:auto}
}

/* Print (for评审打印) */
@media print{
  header,footer{display:none}
  body{background:#fff;color:#000}
  .card,.panel,.pane,.tile,.case,.story,.kpi,.chart{box-shadow:none;border:1px solid #ccc;background:#fff}
}