:root{
    /* 墨玉 · 钢青 */
    --bg:#0B0F14;
    --surface:#131922;
    --surface-2:#1A222C;
    --lift:#202A36;
    --line:rgba(255,255,255,.08);
    --line-2:rgba(255,255,255,.16);
    --text:#EDF1F5;
    --text-2:#A8B4C2;
    --muted:#5F6E7E;
    --accent:#4E7A96;
    --accent-2:#7FA3BC;
    --accent-ink:#0B0F14;
    --logo:#7FA3BC;
    --wash:linear-gradient(135deg,#0B0F14 0%,#152029 60%,#1B2A35 100%);
    --radius:16px;
    --maxw:1180px;
    --shadow:0 24px 60px rgba(0,0,0,.55);
    --mono:ui-monospace,"SF Mono",Consolas,monospace;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Inter","Helvetica Neue",Arial,sans-serif;
    background:var(--bg);color:var(--text);line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden;
  }
  body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:9999;opacity:.03;
    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='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}
  a{color:inherit;text-decoration:none}
  img{display:block;max-width:100%}
  ::selection{background:rgba(127,163,188,.28);color:#fff}
  a:focus-visible,button:focus-visible{outline:2px solid var(--accent-2);outline-offset:3px;border-radius:6px}
  section[id],main[id]{scroll-margin-top:90px}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
  .mono{font-family:var(--mono);letter-spacing:.02em}

  /* ===== Header ===== */
  header{position:fixed;top:0;left:0;right:0;z-index:60;transition:background .4s,border-color .4s,backdrop-filter .4s}
  header.solid{background:rgba(11,15,20,.78);backdrop-filter:blur(14px) saturate(150%);border-bottom:1px solid var(--line)}
  .nav{display:flex;align-items:center;justify-content:space-between;height:76px}
  .brand{display:flex;align-items:center;gap:11px;font-weight:700;letter-spacing:.02em}
  .logo-mark{display:block;fill:currentColor}
  .brand .logo-mark{height:30px;width:30px;color:var(--logo)}
  .brand b{font-size:16px}
  .brand small{color:var(--muted);font-weight:500}
  .menu{display:flex;align-items:center;gap:30px;list-style:none;font-size:14.5px;font-weight:500}
  .menu li{display:flex;align-items:center}
  .menu a{display:inline-flex;align-items:center;color:var(--text-2);position:relative;padding:6px 0;transition:color .25s}
  .menu a:hover,.menu a.active{color:var(--text)}
  .menu a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1.5px;background:var(--accent-2);transition:.3s}
  .menu a:hover::after,.menu a.active::after{width:100%}
  .menu a.cta{color:var(--accent-2);display:inline-flex;align-items:center;gap:7px;font-weight:600}
  .menu a.cta::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent);flex:none;transition:box-shadow .25s}
  .menu a.cta::after{display:none}
  .menu a.cta:hover,.menu a.cta.active{color:var(--text)}
  .menu a.cta.active::before{box-shadow:0 0 0 4px rgba(95,141,169,.16)}
  .nav-cta{display:flex;align-items:center;gap:16px}
  .btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:10px;font-weight:650;font-size:14.5px;transition:.25s;cursor:pointer;border:0;font-family:inherit}
  .btn-primary{background:var(--accent);color:#fff}
  .btn-primary:hover{background:#5F8DA9;transform:translateY(-1px)}
  .btn-ghost{background:transparent;border:1.5px solid var(--line-2);color:var(--text)}
  .btn-ghost:hover{border-color:var(--accent-2);color:var(--text)}
  .lang-toggle{display:inline-flex;align-items:center;font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;border:1px solid var(--line-2);border-radius:999px;overflow:hidden}
  .lang-toggle a{padding:7px 13px;color:var(--muted);transition:.2s}
  .lang-toggle a:hover{color:var(--text-2)}
  .lang-toggle a.active{color:var(--text);background:var(--surface-2)}
  .hamburger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
  .hamburger span{width:24px;height:2px;background:var(--text);transition:.3s}
  .hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .hamburger.open span:nth-child(2){opacity:0}
  .hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .menu .langs{display:none}
  .nav-mask{position:fixed;inset:0;z-index:55;background:rgba(4,7,11,.6);opacity:0;pointer-events:none;transition:opacity .3s}
  .nav-mask.show{opacity:1;pointer-events:auto}
  body.nav-open{overflow:hidden}
  body.nav-open .totop{opacity:0;pointer-events:none}

  /* ===== Hero ===== */
  .hero{position:relative;overflow:hidden;padding:170px 0 120px;background:var(--wash)}
  .hero .grid-bg{position:absolute;inset:0;opacity:.5;
    background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
    background-size:64px 64px;mask-image:radial-gradient(70% 60% at 50% 30%,#000 40%,transparent 100%);
    -webkit-mask-image:radial-gradient(70% 60% at 50% 30%,#000 40%,transparent 100%)}
  .hero .glow{position:absolute;width:760px;height:760px;right:-160px;top:-180px;border-radius:50%;
    background:radial-gradient(circle,rgba(78,122,150,.35),transparent 62%);filter:blur(10px)}
  .hero .wrap{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
  .eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--accent-2);border:1px solid var(--line-2);padding:7px 14px;border-radius:999px}
  .eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--accent-2)}
  .hero h1{font-size:clamp(38px,5.6vw,68px);line-height:1.08;letter-spacing:-.03em;font-weight:800;margin:22px 0 22px}
  .hero h1 .ln{display:block;overflow:hidden;padding-bottom:.06em}
  .hero h1 .ln-i{display:block}
  .hero h1 .hl{color:var(--accent-2)}
  .hero p.lead{color:var(--text-2);font-size:17px;max-width:560px}
  .hero .actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
  .hero .stats{display:flex;gap:44px;margin-top:52px;flex-wrap:wrap}
  .hero .stats .num{font-family:var(--mono);font-size:32px;font-weight:800;color:var(--accent-2);line-height:1}
  .hero .stats .lbl{font-size:13px;color:var(--muted);margin-top:8px}
  .lens-wrap{display:flex;align-items:center;justify-content:center}
  .lens{width:min(100%,380px);height:auto;filter:drop-shadow(0 20px 50px rgba(0,0,0,.5))}

  /* ===== Marquee ===== */
  .marquee{display:flex;width:100%;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(19,25,34,.5);overflow:hidden}
  .marquee .track{display:flex;flex:0 0 auto;min-width:100%;justify-content:space-around;gap:56px;padding:20px 0;white-space:nowrap;will-change:transform}
  .marquee .item{display:flex;align-items:center;gap:12px;color:var(--text-2);font-size:14px;font-weight:600}
  .marquee .item i{color:var(--accent-2);font-size:18px}

  /* ===== Sections ===== */
  section{padding:110px 0;border-bottom:1px solid var(--line)}
  .sec-head{max-width:720px;margin-bottom:56px}
  .sec-head .tag{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--accent-2)}
  .sec-head .tag::before{content:"";width:26px;height:1px;background:var(--accent)}
  .sec-head h2{font-size:clamp(26px,3.6vw,42px);line-height:1.12;letter-spacing:-.025em;font-weight:750;margin:14px 0 14px}
  .sec-head p{color:var(--text-2)}

  .grid{display:grid;gap:22px}
  .cols-2{grid-template-columns:1fr 1fr}
  .cols-3{grid-template-columns:repeat(3,1fr)}
  .cols-4{grid-template-columns:repeat(4,1fr)}

  .card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.3s}
  .card:hover{border-color:var(--line-2);transform:translateY(-4px);box-shadow:var(--shadow)}
  .card .ico{width:52px;height:52px;border-radius:13px;background:var(--surface-2);border:1px solid var(--line);color:var(--accent-2);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:20px;transition:.3s}
  .card:hover .ico{background:var(--lift);border-color:var(--line-2)}
  .card h3{font-size:18px;margin-bottom:10px;letter-spacing:-.01em}
  .card p{color:var(--text-2);font-size:14.5px}

  /* About */
  .about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
  .about-grid p{color:var(--text-2);margin-bottom:16px}
  .facts{list-style:none;margin-top:26px;border-top:1px solid var(--line)}
  .facts li{display:flex;justify-content:space-between;gap:20px;padding:15px 0;border-bottom:1px solid var(--line);font-size:14.5px}
  .facts li span{color:var(--muted)}
  .facts li b{font-weight:600;text-align:right}
  .glass-panel{aspect-ratio:1/1;border-radius:24px;background:var(--wash);border:1px solid var(--line-2);position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center}
  .glass-panel::after{content:"";position:absolute;inset:0;background:radial-gradient(360px 200px at 30% 20%,rgba(127,163,188,.28),transparent 70%)}
  .glass-panel .logo-mark{width:44%;height:44%;color:var(--accent-2);position:relative;z-index:1}

  /* Process chain */
  .flow{display:grid;grid-template-columns:repeat(8,1fr);gap:0;margin-top:14px;position:relative}
  .flow::before{content:"";position:absolute;top:33px;left:6%;right:6%;height:1px;background:linear-gradient(90deg,transparent,var(--line-2) 12%,var(--line-2) 88%,transparent)}
  .step{display:flex;flex-direction:column;align-items:center;text-align:center;padding:0 6px;position:relative}
  .step .dot{width:66px;height:66px;border-radius:50%;background:var(--surface);border:1px solid var(--line-2);display:flex;align-items:center;justify-content:center;font-size:26px;color:var(--accent-2);transition:.3s;position:relative;z-index:1;box-shadow:0 8px 24px rgba(0,0,0,.35)}
  .step:hover .dot{border-color:var(--accent-2);transform:translateY(-4px);background:var(--surface-2)}
  .step .idx{position:absolute;top:-8px;right:-6px;background:var(--accent);color:#fff;font-family:var(--mono);font-size:11px;font-weight:700;width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:2px solid var(--bg);transition:transform .3s}
  .step:hover .idx{transform:translateY(-4px)}
  .step h4{margin:16px 0 6px;font-size:15px;letter-spacing:-.01em;transition:color .3s}
  .step:hover h4{color:var(--accent-2)}
  .step p{color:var(--muted);font-size:12.5px;line-height:1.5;max-width:120px}
  @media(max-width:980px){
    .flow{grid-template-columns:repeat(4,1fr);gap:26px 0}
    .flow::before{display:none}
  }
  @media(max-width:560px){ .flow{grid-template-columns:repeat(2,1fr)} }

  /* Honors */
  .honor{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
  .honor .h{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.3s}
  .honor .h:hover{border-color:var(--line-2);transform:translateY(-4px)}
  .honor .h i{font-size:22px;color:var(--accent-2)}
  .honor .h h4{font-size:16px;margin:14px 0 8px}
  .honor .h p{color:var(--muted);font-size:13px}

  /* Contact */
  .contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:46px;align-items:start}
  .info{list-style:none;margin-top:24px}
  .info li{display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}
  .info li i{color:var(--accent-2);font-size:18px;margin-top:3px}
  .info li a{color:var(--text);border-bottom:1px solid transparent;transition:.2s}
  .info li a:hover{color:var(--accent-2);border-color:var(--accent-2)}
  .map{border:1px solid var(--line-2);border-radius:var(--radius);overflow:hidden;min-height:340px;display:flex;flex-direction:column;background:var(--surface)}
  .map iframe{flex:1;width:100%;border:0;display:block;min-height:290px;filter:grayscale(.35) contrast(1.05)}
  .map a{display:block;text-align:center;color:var(--text-2);font-size:13px;padding:11px;border-top:1px solid var(--line);transition:.2s}
  .map a:hover{color:var(--text);background:var(--surface-2)}

  /* Footer */
  footer{padding:50px 0;color:var(--muted);font-size:13.5px}
  footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
  footer a:hover{color:var(--text-2)}

  .totop{position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;background:var(--surface);border:1px solid var(--line-2);color:var(--text-2);display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;pointer-events:none;transition:.3s;z-index:70}
  .totop.show{opacity:1;pointer-events:auto}
  .totop:hover{color:#fff;border-color:var(--accent-2)}

  @media(max-width:1140px){
    .menu{display:none}
    .hamburger{display:flex}
    .lang-toggle{display:none}
    .menu.open{display:flex;position:absolute;top:76px;left:0;right:0;flex-direction:column;gap:0;background:rgba(11,15,20,.97);backdrop-filter:blur(14px) saturate(150%);padding:8px 24px 18px;border-bottom:1px solid var(--line);max-height:calc(100vh - 76px);overflow-y:auto}
    .menu.open li{display:block;width:100%}
    .menu.open a{display:flex;align-items:center;padding:13px 0;font-size:16px;min-height:48px;border-bottom:1px solid var(--line)}
    .menu.open a::after{display:none}
    .menu.open .cta::before{width:6px;height:6px}
    .menu.open li.langs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:16px 0 0;margin-top:4px}
    .menu.open li.langs span{width:100%;font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--muted)}
    .menu.open li.langs a{display:inline-flex;align-items:center;min-height:0;padding:9px 16px;font-size:13px;border:1px solid var(--line-2);border-radius:999px;color:var(--muted);background:transparent}
    .menu.open li.langs a:hover{color:var(--text-2)}
    .menu.open li.langs a.active{color:var(--text);background:var(--surface-2)}
  }
  @media(max-width:980px){
    .hero .wrap{grid-template-columns:1fr;gap:34px}
    .lens-wrap{order:-1}
    .lens{width:min(70%,280px)}
    section{padding:80px 0}
    .cols-3,.cols-4,.honor{grid-template-columns:1fr 1fr}
    .about-grid,.contact-grid,.cols-2{grid-template-columns:1fr}
    .hero{padding:130px 0 90px}
    .hero .stats{gap:30px}
  }
  @media(max-width:560px){
    .cols-3,.cols-4,.honor{grid-template-columns:1fr}
    .nav{height:64px}
    .menu.open{top:64px;max-height:calc(100vh - 64px)}
    .hero{padding:104px 0 72px}
  }
  @media(prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important}
  }

  /* ===== 语言差异：按 <html lang> 生效，无需分文件 ===== */
  html[lang="zh-CN"] body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
  html[lang="zh-CN"] .hero h1{font-size:clamp(38px,5.6vw,70px);line-height:1.06}
  html[lang="ja"] body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic","Meiryo",sans-serif}
  html[lang="ja"] .hero h1{font-size:clamp(34px,5.2vw,62px);line-height:1.16;letter-spacing:-.02em}
  html[lang="ja"] .sec-head h2{font-size:clamp(24px,3.4vw,40px);line-height:1.16;letter-spacing:-.02em}