/* =========================================================
   凡登科技 · fandeng.net
   ========================================================= */

:root{
  --ink:#05070c;
  --ink-2:#070b13;
  --line:rgba(255,255,255,.085);
  --line-soft:rgba(255,255,255,.05);
  --text:#eaeff8;
  --muted:#8f9bb0;
  --dim:#5d6880;
  --amber:#ffb547;
  --amber-2:#ff7a3d;
  --cyan:#5ad1f0;
  --radius:16px;
  --max:1240px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"SF Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.65;
  color:var(--text);
  background:var(--ink);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.02em}
ul,dl,dd{margin:0;padding:0}
li{list-style:none}

::selection{background:rgba(255,181,71,.28);color:#fff}

/* ---------- page furniture ---------- */
.progress{
  position:fixed;top:0;left:0;height:2px;width:0;z-index:100;
  background:linear-gradient(90deg,var(--amber),var(--amber-2));
  box-shadow:0 0 12px rgba(255,181,71,.6);
}
.grain{
  position:fixed;inset:0;z-index:90;pointer-events:none;opacity:.04;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.bg-lines{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  width:min(100%,var(--max));margin-inline:auto;
  display:grid;grid-template-columns:repeat(4,1fr);
}
.bg-lines i{display:block;border-right:1px solid rgba(255,255,255,.028)}

.wrap{width:min(100% - 56px,var(--max));margin-inline:auto}

main,.nav,.footer{position:relative;z-index:1}

/* ---------- shared ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 27px;border-radius:999px;
  font-size:.94rem;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .28s cubic-bezier(.2,.7,.2,1),box-shadow .28s,background .28s,border-color .28s;
}
.btn svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .28s}
.btn:hover svg{transform:translateX(3px)}
.btn-primary{
  background:linear-gradient(135deg,#ffc768,#ff7a3d);
  color:#1c1103;
  box-shadow:0 14px 38px -14px rgba(255,140,60,.8);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 48px -16px rgba(255,140,60,.95)}
.btn-ghost{border-color:rgba(255,255,255,.16);color:var(--text);background:rgba(255,255,255,.02)}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.3)}
.btn-sm{padding:10px 20px;font-size:.87rem}
.btn-block{width:100%}

.reveal{opacity:0;transform:translateY(24px);transition:opacity .85s cubic-bezier(.2,.7,.2,1),transform .85s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:60;transition:background .4s,border-color .4s}
.nav::after{
  content:"";position:absolute;inset:auto 0 0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.12),transparent);
  opacity:0;transition:opacity .4s;
}
.nav.is-scrolled{background:rgba(5,7,12,.78);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px)}
.nav.is-scrolled::after{opacity:1}

.nav-inner{display:flex;align-items:center;justify-content:space-between;height:80px;gap:24px}

.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.mark{
  width:36px;height:36px;display:grid;place-items:center;border-radius:11px;
  background:linear-gradient(150deg,rgba(255,181,71,.26),rgba(255,122,61,.06));
  border:1px solid rgba(255,181,71,.3);
  box-shadow:inset 0 0 22px rgba(255,181,71,.18),0 0 28px -8px rgba(255,181,71,.6);
}
.mark svg{width:18px;height:18px;fill:var(--amber)}
.mark.small{width:32px;height:32px;border-radius:10px}
.mark.small svg{width:16px;height:16px}
.brand-text{display:flex;flex-direction:column;line-height:1.15;font-weight:650;font-size:1rem}
.brand-text em{font-style:normal;font-size:.58rem;letter-spacing:.24em;color:var(--dim);font-weight:500;margin-top:3px}

.nav-links{display:flex;gap:6px}
.nav-links a{
  display:flex;align-items:center;gap:7px;
  padding:8px 13px;border-radius:8px;
  font-size:.88rem;color:var(--muted);
  transition:color .25s,background .25s;
}
.nav-links a span{
  font-family:var(--mono);font-size:.6rem;color:var(--dim);
  transition:color .25s;
}
.nav-links a:hover{color:var(--text);background:rgba(255,255,255,.04)}
.nav-links a:hover span{color:var(--amber)}

.menu-toggle{
  display:none;width:42px;height:42px;border-radius:11px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;
}
.menu-toggle span{display:block;width:17px;height:1.5px;background:var(--text);transition:transform .3s,opacity .3s}
.menu-toggle[aria-expanded="true"] span:first-child{transform:translateY(3.2px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:last-child{transform:translateY(-3.2px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;padding:158px 0 84px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(900px 620px at 74% 18%,rgba(255,150,60,.13),transparent 62%),
    radial-gradient(700px 520px at 12% 6%,rgba(90,209,240,.06),transparent 58%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.04fr .96fr;gap:44px;align-items:center}

.hero-meta{display:flex;align-items:center;gap:16px;font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;color:var(--dim);flex-wrap:wrap}
.live{display:inline-flex;align-items:center;gap:9px;color:var(--amber)}
.live i{width:5px;height:5px;border-radius:50%;background:var(--amber);box-shadow:0 0 10px 2px rgba(255,181,71,.8);animation:pulse-dot 2.4s ease-in-out infinite}
.meta-sep{width:28px;height:1px;background:rgba(255,255,255,.18)}
@keyframes pulse-dot{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.7)}}

.hero h1{
  font-size:clamp(2.6rem,5.1vw,4.25rem);
  line-height:1.06;letter-spacing:-.042em;font-weight:800;
  margin-top:26px;
}
.hero h1 .hl{
  background:linear-gradient(100deg,#ffe0ad,#ffb547 44%,#ff6b4a);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  position:relative;
}
.hero h1 .hl::after{
  content:"";position:absolute;left:2px;right:2px;bottom:.06em;height:1px;
  background:linear-gradient(90deg,rgba(255,181,71,.7),transparent);
}

.hero-sub{margin:28px 0 0;max-width:520px;font-size:1rem;line-height:1.9;color:var(--muted)}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}

.hero-facts{display:flex;margin-top:44px;padding-top:26px;border-top:1px solid var(--line)}
.hero-facts li{padding:0 26px;border-left:1px solid var(--line)}
.hero-facts li:first-child{padding-left:0;border-left:0}
.hero-facts b{display:block;font-size:.92rem;font-weight:650;letter-spacing:.01em}
.hero-facts span{display:block;margin-top:5px;font-size:.74rem;color:var(--dim);letter-spacing:.02em}

/* ---------- aperture / three.js stage ---------- */
.aperture{
  position:relative;width:min(100%,480px);aspect-ratio:1;margin-inline:auto;
  display:grid;place-items:center;isolation:isolate;
}
.aperture canvas{position:absolute;inset:0;width:100%!important;height:100%!important;z-index:0}

.ap-glow{
  position:absolute;inset:6%;border-radius:50%;z-index:0;
  background:radial-gradient(circle,rgba(255,140,60,.22),rgba(255,120,50,.06) 46%,transparent 70%);
  filter:blur(18px);
}
.ap-ticks{
  position:absolute;inset:0;border-radius:50%;z-index:1;pointer-events:none;
  background:repeating-conic-gradient(from 0deg,rgba(255,181,71,.42) 0 .45deg,transparent .45deg 2.6deg);
  -webkit-mask:radial-gradient(circle,transparent 0 47.4%,#000 47.7% 49.3%,transparent 49.6%);
  mask:radial-gradient(circle,transparent 0 47.4%,#000 47.7% 49.3%,transparent 49.6%);
  animation:spin 110s linear infinite;
}
.ap-ring{position:absolute;border-radius:50%;z-index:1;border:1px solid rgba(255,255,255,.07);pointer-events:none}
.ap-ring-1{inset:12%}
.ap-ring-2{inset:26%;border-color:rgba(255,181,71,.12)}

.ap-arc{position:absolute;border-radius:50%;z-index:1;pointer-events:none}
.ap-arc-1{
  inset:4%;
  background:conic-gradient(from 0deg,transparent 0 46deg,rgba(255,181,71,.95) 46deg 47.4deg,transparent 47.4deg 168deg,rgba(255,181,71,.35) 168deg 169deg,transparent 169deg 360deg);
  -webkit-mask:radial-gradient(circle,transparent 0 48.4%,#000 48.8% 49.6%,transparent 50%);
  mask:radial-gradient(circle,transparent 0 48.4%,#000 48.8% 49.6%,transparent 50%);
  animation:spin 22s linear infinite;
}
.ap-arc-2{
  inset:16%;
  background:conic-gradient(from 180deg,transparent 0 60deg,rgba(90,209,240,.7) 60deg 61deg,transparent 61deg 360deg);
  -webkit-mask:radial-gradient(circle,transparent 0 49.1%,#000 49.4% 50%,transparent 50.3%);
  mask:radial-gradient(circle,transparent 0 49.1%,#000 49.4% 50%,transparent 50.3%);
  animation:spin 34s linear infinite reverse;
}
@keyframes spin{to{transform:rotate(360deg)}}

.ap-cross{position:absolute;background:rgba(255,255,255,.055);z-index:1;pointer-events:none}
.ap-cross-x{left:0;right:0;top:50%;height:1px}
.ap-cross-y{top:0;bottom:0;left:50%;width:1px}

.ap-core{
  position:absolute;width:26%;height:26%;border-radius:50%;z-index:0;pointer-events:none;
  background:radial-gradient(circle at 40% 36%,#fff3d6,#ffc061 30%,#ff8a3d 60%,rgba(255,90,40,.25) 82%,transparent 100%);
  box-shadow:0 0 60px 14px rgba(255,150,60,.4),0 0 140px 50px rgba(255,110,45,.16);
  animation:breathe 8s ease-in-out infinite;
}
@keyframes breathe{0%,100%{transform:scale(1);opacity:.95}50%{transform:scale(1.07);opacity:1}}

/* 有 WebGL 时，光核交给 three.js 的 sprite，避免两层叠加曝掉 */
.aperture.has-canvas .ap-core{display:none}

.ap-label{
  position:absolute;z-index:2;pointer-events:none;
  font-family:var(--mono);font-size:.6rem;letter-spacing:.1em;
  color:rgba(200,212,230,.55);
  padding:3px 8px;border:1px solid rgba(255,255,255,.07);border-radius:4px;
  background:rgba(5,7,12,.6);backdrop-filter:blur(4px);
  white-space:nowrap;
}
.l1{top:9%;left:2%}
.l2{top:24%;right:-2%}
.l3{bottom:19%;left:-1%}
.l4{bottom:7%;right:4%}

/* ---------- marquee ---------- */
.marquee{
  position:relative;z-index:1;overflow:hidden;
  border-block:1px solid var(--line);
  padding:16px 0;
  background:rgba(255,255,255,.012);
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
}
.marquee-track{display:flex;align-items:center;gap:34px;width:max-content;animation:marquee 46s linear infinite}
.marquee span{
  font-size:.78rem;letter-spacing:.2em;color:var(--dim);white-space:nowrap;
  text-transform:uppercase;
}
.marquee i{width:4px;height:4px;border-radius:50%;background:var(--amber);opacity:.5}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ---------- stats ---------- */
.stats{position:relative;z-index:1;border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);padding:44px 0}
.stat{padding:0 34px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0;padding-left:0}
.stat b{
  display:block;font-size:2.35rem;font-weight:800;letter-spacing:-.04em;line-height:1.1;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(180deg,#fff,#ffc98a);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat b i{font-style:normal;font-size:.95rem;font-weight:600;margin-left:3px;letter-spacing:0}
.stat > span{display:block;margin-top:8px;font-size:.8rem;color:var(--muted);letter-spacing:.04em}

/* ---------- section header ---------- */
.sec{position:relative;padding:104px 0}
.sec-head{
  display:grid;grid-template-columns:186px 1fr;gap:44px;
  padding-top:26px;border-top:1px solid var(--line);
  margin-bottom:58px;
}
.sec-mark{display:flex;flex-direction:column;gap:8px}
.sec-idx{
  font-family:var(--mono);font-size:2.1rem;line-height:1;font-weight:600;
  color:rgba(255,255,255,.13);letter-spacing:-.02em;
}
.sec-label{font-family:var(--mono);font-size:.64rem;letter-spacing:.24em;color:var(--amber);opacity:.75}
.sec-title h2{font-size:clamp(1.8rem,3.2vw,2.55rem);line-height:1.16;letter-spacing:-.032em}
.sec-title p{margin:16px 0 0;max-width:560px;font-size:.96rem;line-height:1.85;color:var(--muted)}

/* ---------- bento services ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:14px}

.card{
  position:relative;grid-column:span 3;
  padding:26px 24px 24px;border-radius:var(--radius);
  border:1px solid var(--line);overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.038),rgba(255,255,255,.008));
  transition:transform .45s cubic-bezier(.2,.7,.2,1),border-color .45s,background .45s;
}
.card::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .45s;
  background:radial-gradient(420px 240px at var(--mx,50%) var(--my,0%),rgba(255,181,71,.14),transparent 68%);
}
.card:hover{transform:translateY(-5px);border-color:rgba(255,181,71,.28)}
.card:hover::before{opacity:1}
.card-md{grid-column:span 4}
.card-lg{
  grid-column:span 6;
  display:grid;grid-template-columns:1fr 132px;gap:22px;align-items:center;
  padding:30px 30px 28px;
}

.ico{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:rgba(255,181,71,.09);border:1px solid rgba(255,181,71,.18);
  color:var(--amber);margin-bottom:18px;
  transition:background .35s,transform .35s;
}
.card:hover .ico{background:rgba(255,181,71,.16);transform:translateY(-2px)}
.ico svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}

.card h3{font-size:1.04rem;margin-bottom:9px;letter-spacing:-.015em}
.card p{margin:0;font-size:.87rem;line-height:1.78;color:var(--muted)}

.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:16px}
.tags span{
  font-size:.68rem;padding:3px 9px;border-radius:5px;letter-spacing:.02em;
  color:#a3afc4;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.055);
}

/* card visuals */
.card-visual{position:relative}
.layers{display:flex;flex-direction:column;gap:6px}
.layer{
  display:flex;align-items:center;justify-content:space-between;
  padding:8px 11px;border-radius:7px;
  border:1px solid rgba(255,255,255,.08);
  background:rgba(255,255,255,.022);
}
.layer:nth-child(2){margin-inline:5px}
.layer:nth-child(3){margin-inline:10px}
.layer span{font-family:var(--mono);font-size:.58rem;color:var(--dim);letter-spacing:.04em}
.layer i{
  width:5px;height:5px;border-radius:50%;background:var(--amber);
  box-shadow:0 0 8px rgba(255,181,71,.8);opacity:.6;
}
.layer i + i{margin-left:5px}

.gpus{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;width:132px}
.gpus span{
  aspect-ratio:1;border-radius:6px;position:relative;
  border:1px solid rgba(255,255,255,.08);
  background:linear-gradient(145deg,rgba(255,181,71,.1),rgba(255,255,255,.01));
}
.gpus span::after{
  content:"";position:absolute;inset:31%;border-radius:2px;
  background:rgba(255,181,71,.38);
  transition:background .3s;
}
.gpus span:nth-child(2n)::after{background:rgba(90,209,240,.3)}

.addon-bar{
  display:grid;grid-template-columns:120px 1fr;gap:26px;align-items:center;
  margin-top:26px;padding:22px 26px;border-radius:12px;
  border:1px dashed rgba(255,255,255,.12);
  background:rgba(255,255,255,.014);
}
.addon-label{font-family:var(--mono);font-size:.64rem;letter-spacing:.22em;color:var(--dim)}
.addon-items{display:flex;flex-wrap:wrap;gap:10px 26px}
.addon-items span{font-size:.83rem;color:#b2bdd0;position:relative;padding-left:13px}
.addon-items span::before{
  content:"";position:absolute;left:0;top:.66em;width:4px;height:1px;background:var(--amber);opacity:.75;
}

/* ---------- hardware ---------- */
.hw-sec{
  border-block:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,181,71,.028),transparent 38%);
}
.hw-layout{display:grid;grid-template-columns:.86fr 1.14fr;gap:56px;align-items:center}

.hw-device{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-height:430px;
}
.hw-device::before{
  content:"";position:absolute;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,150,60,.13),transparent 66%);
  filter:blur(20px);z-index:0;
}

.robot{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center}
.robot-antenna{
  position:absolute;top:-38px;left:50%;transform:translateX(-50%);
  width:2px;height:40px;border-radius:2px;
  background:linear-gradient(180deg,rgba(255,181,71,.05),rgba(255,181,71,.55));
}
.robot-antenna i{
  position:absolute;top:-6px;left:50%;transform:translateX(-50%);
  width:10px;height:10px;border-radius:50%;
  background:radial-gradient(circle at 40% 35%,#ffe6b8,#ffb547 60%);
  box-shadow:0 0 16px 4px rgba(255,181,71,.6);
  animation:pulse-dot 3s ease-in-out infinite;
}
.robot-head{
  width:200px;height:158px;border-radius:46px;
  background:linear-gradient(158deg,#1b2231,#0b1019 62%);
  border:1px solid rgba(255,255,255,.11);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14),0 24px 60px -24px rgba(0,0,0,.9),0 0 70px -26px rgba(255,181,71,.5);
  display:grid;place-items:center;position:relative;
}
.robot-head::after{
  content:"";position:absolute;top:9px;left:50%;transform:translateX(-50%);
  width:46px;height:3px;border-radius:3px;background:rgba(255,255,255,.07);
}
.robot-screen{
  position:relative;width:168px;height:124px;border-radius:34px;overflow:hidden;
  background:radial-gradient(130% 120% at 50% 0%,#12202f,#05080f 72%);
  border:1px solid rgba(255,181,71,.13);
  display:flex;align-items:center;justify-content:center;gap:28px;
}
.robot-screen::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0 1px,transparent 1px 3px);
}
.eye{
  width:15px;height:15px;border-radius:50%;position:relative;z-index:1;
  background:radial-gradient(circle,#fff4d8,#ffb547 58%,#ff8a3d);
  box-shadow:0 0 18px 4px rgba(255,181,71,.55);
  animation:blink 6.5s ease-in-out infinite;
}
.eye.right{animation-delay:.15s}
@keyframes blink{
  0%,92%,100%{transform:scaleY(1)}
  95%{transform:scaleY(.12)}
}
.mouth{
  position:absolute;bottom:24px;left:50%;transform:translateX(-50%);
  width:24px;height:2px;border-radius:2px;background:rgba(255,181,71,.45);
  box-shadow:0 0 8px rgba(255,181,71,.5);
}
.robot-body{
  width:152px;height:112px;margin-top:5px;position:relative;
  border-radius:20px 20px 38px 38px;
  background:linear-gradient(180deg,#161d2a,#090d15);
  border:1px solid rgba(255,255,255,.09);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.robot-body i{
  position:absolute;top:22px;left:50%;transform:translateX(-50%);
  width:32px;height:3px;border-radius:3px;
  background:rgba(255,181,71,.4);
  box-shadow:0 0 12px rgba(255,181,71,.55);
}
.robot-shadow{
  position:relative;z-index:0;width:260px;height:26px;margin-top:6px;border-radius:50%;
  background:radial-gradient(ellipse,rgba(0,0,0,.75),transparent 70%);
  filter:blur(6px);
}
.hw-caption{
  margin-top:26px;font-family:var(--mono);font-size:.62rem;letter-spacing:.24em;
  color:var(--dim);
}

.hw-list{display:flex;flex-direction:column}
.hw-item{display:grid;grid-template-columns:42px 1fr;gap:20px;padding:26px 0;border-top:1px solid var(--line)}
.hw-item:last-child{border-bottom:1px solid var(--line)}
.hw-step{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;color:var(--amber);padding-top:4px}
.hw-item h4{font-size:1rem;margin-bottom:9px}
.hw-item p{margin:0;font-size:.87rem;line-height:1.78;color:var(--muted)}
.hw-item ul{display:flex;flex-wrap:wrap;gap:6px;margin-top:13px}
.hw-item li{
  font-size:.68rem;padding:3px 9px;border-radius:5px;color:#a3afc4;
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.055);
}
.hw-note{
  margin:36px 0 0;padding-left:16px;border-left:2px solid rgba(255,181,71,.45);
  font-size:.86rem;line-height:1.85;color:var(--muted);
}
.hw-note b{color:var(--text);font-weight:600}

/* ---------- stack ---------- */
.stack-list{margin:0}
.stack-row{
  display:grid;grid-template-columns:152px 1fr;gap:26px;align-items:start;
  padding:20px 0;border-top:1px solid var(--line);
}
.stack-row:last-child{border-bottom:1px solid var(--line)}
.stack-row dt{
  font-family:var(--mono);font-size:.62rem;letter-spacing:.2em;color:var(--dim);
  padding-top:10px;
}
.stack-row dd{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  padding:7px 13px;border-radius:7px;font-size:.82rem;color:#bcc7d9;
  border:1px solid var(--line);background:rgba(255,255,255,.025);
  transition:.25s;
}
.tag:hover{border-color:rgba(255,181,71,.34);color:#fff;background:rgba(255,181,71,.07);transform:translateY(-1px)}

/* ---------- process ---------- */
.process-sec{background:var(--ink-2);border-block:1px solid var(--line)}
.steps{display:grid;grid-template-columns:repeat(6,1fr);position:relative;padding-top:32px}
.steps::before{
  content:"";position:absolute;top:4px;left:3px;right:3px;height:1px;
  background:repeating-linear-gradient(90deg,rgba(255,181,71,.4) 0 4px,transparent 4px 10px);
}
.step{position:relative;padding-right:18px}
.step::before{
  content:"";position:absolute;top:-32px;left:0;width:8px;height:8px;border-radius:50%;
  background:var(--ink-2);border:1px solid rgba(255,181,71,.65);
  box-shadow:0 0 12px 1px rgba(255,181,71,.35);
  transition:background .3s,box-shadow .3s;
}
.step:hover::before{background:var(--amber);box-shadow:0 0 16px 3px rgba(255,181,71,.6)}
.step .num{display:block;font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;color:var(--amber);margin-bottom:11px}
.step h4{font-size:.95rem;margin-bottom:7px}
.step p{margin:0;font-size:.81rem;line-height:1.72;color:var(--muted)}

/* ---------- cases ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.case{
  padding:30px 28px;border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.038),rgba(255,255,255,.006));
  transition:border-color .4s,transform .4s,background .4s;
}
.case:hover{border-color:rgba(255,181,71,.24);transform:translateY(-4px);background:linear-gradient(160deg,rgba(255,181,71,.05),rgba(255,255,255,.006))}
.case-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.case-tag{
  font-size:.68rem;letter-spacing:.1em;color:var(--amber);
  padding:4px 10px;border-radius:5px;
  background:rgba(255,181,71,.09);border:1px solid rgba(255,181,71,.17);
}
.case-idx{font-family:var(--mono);font-size:.66rem;color:rgba(255,255,255,.16);letter-spacing:.1em}
.case h3{font-size:1.14rem;margin-bottom:11px}
.case p{margin:0;font-size:.88rem;line-height:1.8;color:var(--muted)}
.results{display:flex;gap:46px;margin-top:26px;padding-top:20px;border-top:1px solid var(--line)}
.results b{
  display:block;font-size:1.34rem;font-weight:800;letter-spacing:-.03em;
  background:linear-gradient(180deg,#fff,#ffc478);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.results span{display:block;margin-top:4px;font-size:.72rem;color:var(--dim);letter-spacing:.03em}

/* ---------- principles ---------- */
.principles-sec{border-top:1px solid var(--line)}
.principle{
  display:grid;grid-template-columns:96px 220px 1fr;gap:34px;align-items:baseline;
  padding:30px 0;border-top:1px solid var(--line);
  transition:background .35s;
}
.principle:last-child{border-bottom:1px solid var(--line)}
.principle:hover{background:rgba(255,181,71,.02)}
.p-num{font-family:var(--mono);font-size:1.5rem;letter-spacing:-.02em;color:rgba(255,255,255,.14)}
.principle h4{font-size:1.08rem;letter-spacing:-.015em}
.principle p{margin:0;font-size:.9rem;line-height:1.82;color:var(--muted);max-width:620px}

/* ---------- faq ---------- */
.faq-wrap{max-width:1000px}
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;position:relative;
  display:flex;align-items:center;gap:18px;
  padding:22px 46px 22px 0;font-size:.99rem;font-weight:600;
  transition:color .25s;
}
.faq summary::-webkit-details-marker{display:none}
.q-idx{
  font-family:var(--mono);font-size:.66rem;letter-spacing:.1em;
  color:var(--dim);flex-shrink:0;transition:color .25s;
}
.faq summary::after{
  content:"";position:absolute;right:8px;top:50%;width:9px;height:9px;
  border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);
  transform:translateY(-70%) rotate(45deg);transition:transform .3s,border-color .3s;
}
.faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--amber)}
.faq summary:hover{color:var(--amber)}
.faq summary:hover .q-idx{color:var(--amber)}
.faq details p{
  margin:0 0 24px;padding:0 40px 0 52px;
  font-size:.9rem;line-height:1.88;color:var(--muted);
}

/* ---------- contact ---------- */
.contact-sec{
  border-top:1px solid var(--line);
  background:
    radial-gradient(760px 460px at 12% 4%,rgba(255,181,71,.07),transparent 62%),
    var(--ink-2);
}
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:60px;align-items:start}
.contact-list{display:flex;flex-direction:column}
.contact-list li{
  display:flex;align-items:baseline;gap:20px;
  padding:16px 0;border-top:1px solid var(--line);font-size:.94rem;
}
.contact-list li:last-child{border-bottom:1px solid var(--line)}
.contact-list span{
  width:48px;flex-shrink:0;font-family:var(--mono);font-size:.62rem;
  letter-spacing:.18em;color:var(--dim);
}
.contact-list a,.contact-list em{
  font-style:normal;color:var(--text);
  border-bottom:1px solid transparent;transition:color .22s,border-color .22s;
}
.contact-list a:hover{color:var(--amber);border-bottom-color:rgba(255,181,71,.5)}
.contact-note{margin:22px 0 0;font-size:.78rem;color:var(--dim);line-height:1.7}

.contact-steps{display:grid;gap:1px;background:rgba(255,255,255,.085);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.cs-item{padding:26px 28px;background:linear-gradient(180deg,rgba(255,255,255,.022),transparent),var(--ink-2)}
.cs-num{display:block;font-family:var(--mono);font-size:.62rem;letter-spacing:.2em;color:var(--amber);margin-bottom:9px}
.cs-item h3{margin:0 0 8px;font-size:1.02rem;font-weight:600;letter-spacing:-.01em}
.cs-item p{margin:0;font-size:.85rem;line-height:1.72;color:var(--dim)}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--line);padding:52px 0 34px;background:var(--ink);overflow:hidden}
.footer-top{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-brand strong{display:block;font-size:.94rem;font-weight:650}
.footer-brand div > span{display:block;font-size:.68rem;color:var(--dim);letter-spacing:.18em;margin-top:3px;font-family:var(--mono)}
.footer-links{display:flex;gap:24px}
.footer-links a{font-size:.84rem;color:var(--muted);transition:color .22s}
.footer-links a:hover{color:var(--amber)}

.footer-word{
  margin:46px 0 26px;
  font-size:clamp(3.6rem,15vw,12.5rem);
  line-height:.78;font-weight:800;letter-spacing:-.055em;
  text-align:center;user-select:none;pointer-events:none;
  color:transparent;
  -webkit-text-stroke:1px rgba(255,255,255,.065);
  background:linear-gradient(180deg,rgba(255,255,255,.035),transparent 78%);
  -webkit-background-clip:text;background-clip:text;
}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding-top:22px;border-top:1px solid var(--line);
}
.footer-bottom p{margin:0;font-size:.76rem;color:var(--dim);letter-spacing:.03em}

/* =========================================================
   responsive
   ========================================================= */
@media (max-width:1120px){
  .hero-grid{grid-template-columns:1fr;gap:10px}
  .aperture{width:min(100%,400px);margin-bottom:8px}
  .card,.card-md{grid-column:span 6}
  .card-lg{grid-column:span 12}
  .steps{grid-template-columns:repeat(3,1fr);gap:44px 0}
  .steps::before{display:none}
  .step::before{display:none}
  .hw-layout{grid-template-columns:1fr;gap:20px}
  .hw-device{min-height:380px;order:-1}
}

@media (max-width:900px){
  .nav-links{
    position:absolute;top:80px;left:22px;right:22px;
    flex-direction:column;gap:2px;padding:10px;
    background:rgba(7,11,19,.97);border:1px solid var(--line);border-radius:14px;
    backdrop-filter:blur(22px);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:.3s;
  }
  .nav-links.open{opacity:1;visibility:visible;transform:none}
  .nav-links a{padding:13px 14px;border-radius:8px;font-size:.93rem}
  .menu-toggle{display:flex}
  .nav-cta{display:none}

  .sec-head{grid-template-columns:1fr;gap:14px;padding-top:22px}
  .sec-mark{flex-direction:row;align-items:baseline;gap:12px}
  .sec-idx{font-size:1.5rem}
  .contact-grid{grid-template-columns:1fr;gap:36px}
  .principle{grid-template-columns:70px 1fr;gap:8px 24px}
  .principle p{grid-column:2;margin-top:6px}
  .addon-bar{grid-template-columns:1fr;gap:12px}
  .stack-row{grid-template-columns:1fr;gap:10px}
  .stack-row dt{padding-top:0}
}

@media (max-width:720px){
  .wrap{width:min(100% - 36px,var(--max))}
  .hero{padding:120px 0 60px}
  .hero h1{font-size:clamp(2.1rem,8.4vw,2.9rem)}
  .hero-sub{font-size:.94rem;margin-top:22px}
  .hero-facts{flex-wrap:wrap;gap:16px 0;margin-top:32px}
  .hero-facts li{width:100%;padding:0;border-left:0}
  .hero-facts b,.hero-facts span{display:inline;font-size:.82rem}
  .hero-facts span{margin-left:10px;color:var(--dim)}
  .ap-label{font-size:.52rem;padding:2px 6px}

  .sec{padding:76px 0}
  .sec-head{margin-bottom:40px}
  .card,.card-md,.card-lg{grid-column:span 12}
  .card-lg{grid-template-columns:1fr}
  .card-visual{display:none}
  .grid-2{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr;gap:36px 0}
  .stats-grid{grid-template-columns:1fr 1fr;gap:26px 0;padding:34px 0}
  .stat{padding:0 22px}
  .stat:nth-child(3){border-left:0;padding-left:0}
  .results{gap:28px}
  .hw-device{min-height:340px}
  .robot-head{width:176px;height:140px;border-radius:40px}
  .robot-screen{width:148px;height:110px;border-radius:30px;gap:24px}
  .robot-body{width:136px;height:98px}
  .robot-shadow{width:230px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}

@media (max-width:480px){
  .steps{grid-template-columns:1fr}
  .cta-row .btn{width:100%}
  .btn{padding:14px 22px}
  .l2{right:-4%}
  .l4{right:-2%}
  .principle{grid-template-columns:1fr}
  .principle p{grid-column:1}
  .p-num{font-size:1.1rem}
}

@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* =========================================================
   内页 / 多页面（2026-11 改版）
   ========================================================= */
.nav-links a.on{color:var(--text)}
.nav-links a.on::after{transform:scaleX(1)}

.sec-tight{padding-top:0}
.page-hero{padding:132px 0 8px;position:relative}
.page-hero .breadcrumb{
  display:flex;gap:10px;align-items:center;flex-wrap:wrap;
  font-family:var(--mono);font-size:.66rem;letter-spacing:.12em;color:var(--dim);
  margin-bottom:26px;
}
.page-hero .breadcrumb a{color:var(--dim);text-decoration:none;transition:color .2s}
.page-hero .breadcrumb a:hover{color:var(--amber)}
.page-hero .sec-label{display:block;margin-bottom:14px}
.page-hero h1{
  margin:0 0 20px;font-size:clamp(2rem,4.6vw,3.5rem);line-height:1.12;
  letter-spacing:-.03em;font-weight:600;
  background:linear-gradient(100deg,#fff 12%,#ffd9ab 58%,#ff9d63 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  max-width:16em;
}
.page-lede{margin:0;max-width:60ch;font-size:1.02rem;line-height:1.78;color:var(--muted)}
.page-hero .cta-row{margin-top:32px}

.prose{max-width:74ch}
.prose h2{margin:0 0 18px;font-size:1.5rem;letter-spacing:-.02em;font-weight:600}
.prose p{margin:0 0 18px;font-size:1rem;line-height:1.86;color:var(--muted)}
.prose strong{color:var(--text);font-weight:600}

.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature{
  padding:26px 24px;border-radius:14px;border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.032),rgba(255,255,255,.008));
}
.feature .ico{margin-bottom:16px}
.feature h3{margin:0 0 10px;font-size:.98rem;font-weight:600;letter-spacing:-.01em}
.feature p{margin:0;font-size:.84rem;line-height:1.74;color:var(--dim)}

.split-check{display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;align-items:start}
.h2-sm{margin:0 0 14px;font-size:1.42rem;letter-spacing:-.02em;font-weight:600}
.dim-p{margin:0;font-size:.92rem;line-height:1.8;color:var(--dim);max-width:34ch}
.check-list{list-style:none;margin:0;padding:0;display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.check-list li{
  position:relative;padding:17px 22px 17px 50px;background:var(--ink-2);
  font-size:.9rem;color:var(--muted);
}
.check-list li::before{
  content:"";position:absolute;left:21px;top:22px;width:13px;height:8px;
  border-left:1.6px solid var(--amber);border-bottom:1.6px solid var(--amber);
  transform:rotate(-45deg);
}

.cta-band{padding:74px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:radial-gradient(700px 260px at 20% 0%,rgba(255,181,71,.09),transparent 65%),var(--ink-2)}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta-inner h2{margin:0 0 10px;font-size:1.62rem;letter-spacing:-.02em;font-weight:600}
.cta-inner p{margin:0;font-size:.92rem;color:var(--dim);max-width:52ch}

.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:22px}
.rel{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:18px 22px;border-radius:12px;border:1px solid var(--line);
  color:var(--text);text-decoration:none;font-size:.92rem;
  transition:border-color .24s,background .24s,transform .24s;
}
.rel i{color:var(--amber);font-style:normal;transition:transform .24s}
.rel:hover{border-color:rgba(255,181,71,.4);background:rgba(255,181,71,.05);transform:translateY(-2px)}
.rel:hover i{transform:translateX(4px)}

.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.svc{
  display:flex;flex-direction:column;gap:12px;
  padding:30px 26px;border-radius:16px;border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.034),rgba(255,255,255,.008));
  text-decoration:none;color:var(--text);
  transition:border-color .26s,transform .26s,background .26s;
}
.svc h3{margin:0;font-size:1.06rem;font-weight:600;letter-spacing:-.01em}
.svc p{margin:0;font-size:.86rem;line-height:1.76;color:var(--dim);flex:1}
.svc-more{font-family:var(--mono);font-size:.62rem;letter-spacing:.14em;color:var(--amber);opacity:.8}
.svc-more i{font-style:normal;margin-left:4px;transition:margin-left .24s}
.svc:hover{border-color:rgba(255,181,71,.42);background:rgba(255,181,71,.045);transform:translateY(-3px)}
.svc:hover .svc-more i{margin-left:10px}

@media (max-width:1120px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .svc-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .page-hero{padding-top:112px}
  .split-check{grid-template-columns:1fr;gap:30px}
  .dim-p{max-width:62ch}
  .related-grid{grid-template-columns:1fr}
  .cta-inner{gap:26px}
}
@media (max-width:720px){
  .feature-grid{grid-template-columns:1fr}
  .svc-grid{grid-template-columns:1fr}
  .page-hero{padding-top:104px}
  .page-hero h1{max-width:none}
  .cta-band{padding:56px 0}
}

/* 首页卡片标题内链 */
.card h3 a{color:inherit;text-decoration:none;transition:color .22s}
.card h3 a:hover{color:var(--amber)}
.sec-title p a{color:var(--amber);text-decoration:none;border-bottom:1px solid rgba(255,181,71,.35)}
.sec-title p a:hover{border-bottom-color:var(--amber)}

/* 内页首屏与下一节之间的间距收紧 */
.page-hero + .sec{padding-top:56px}
.prose h2:not(:first-child){margin-top:34px}

/* 内页节奏：比首页更紧凑 */
.inner .sec{padding:76px 0}
.inner .sec-tight{padding-top:0;padding-bottom:0}
.inner .page-hero + .sec{padding-top:48px}
.inner .sec-tight + .sec{padding-top:56px}
.inner .faq-wrap{padding-top:0}
.inner .faq-wrap{max-width:none}

/* ---- 模型矩阵（llm 页） ---- */
.model-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.model-col{
  border:1px solid var(--line);border-radius:16px;overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,.006));
}
.model-col>header{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  padding:20px 24px 16px;border-bottom:1px solid var(--line);
}
.model-col>header h3{font-size:.98rem;font-weight:600;letter-spacing:-.01em}
.model-col>header em{
  font-family:var(--mono);font-size:.6rem;letter-spacing:.18em;
  color:var(--dim);font-style:normal;
}
.model-col ul{list-style:none;margin:0;padding:0}
.model-item{
  display:grid;grid-template-columns:1fr auto;gap:6px 14px;
  padding:16px 24px;border-top:1px solid var(--line-soft);
  transition:background .25s ease;
}
.model-item:first-child{border-top:0}
.model-item:hover{background:rgba(255,181,71,.035)}
.mi-head{grid-column:1;grid-row:1;display:flex;align-items:baseline;gap:10px;min-width:0}
.mi-head b{font-size:.9rem;font-weight:600;color:var(--text)}
.mi-head span{font-size:.7rem;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.model-item p{grid-column:1/-1;margin:0;font-size:.8rem;line-height:1.66;color:var(--muted)}
.mi-tag{
  grid-column:2;grid-row:1;align-self:center;
  font-family:var(--mono);font-size:.58rem;letter-spacing:.06em;white-space:nowrap;
  color:var(--dim);border:1px solid var(--line);border-radius:999px;padding:3px 9px;
}
.mi-tag.is-local{color:var(--amber);border-color:rgba(255,181,71,.34);background:rgba(255,181,71,.06)}
.model-note{margin:26px 0 0;max-width:70ch;font-size:.82rem;line-height:1.8;color:var(--dim)}

@media (max-width:860px){
  .model-grid{grid-template-columns:1fr}
  .model-item{padding:15px 20px}
}