/* ========================================================================
   Code0 — AI Model Aggregator Landing
   Aesthetic: Terminal Brutalism · neon-green CRT · monospace dignity
   ======================================================================== */

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{min-height:100vh;overflow-x:hidden;font-feature-settings:"ss01","ss02","cv11";-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
a{color:inherit;text-decoration:none}
ul{list-style:none;margin:0;padding:0}
input,select{font:inherit;color:inherit}

/* ========================================================================
   1. Tokens — semantic CSS vars (dual theme)
   ======================================================================== */

:root{
  /* surfaces */
  --bg-base:#0A0F0D;
  --bg-elevated:#101714;
  --bg-card:rgba(20,28,24,.6);
  --bg-card-strong:rgba(16,23,20,.85);
  --bg-card-hover:rgba(30,215,96,.08);
  --bg-code:#06100C;
  --bg-pill:rgba(20,28,24,.7);

  /* borders */
  --border-subtle:rgba(255,255,255,.08);
  --border-soft:rgba(255,255,255,.05);
  --border-strong:rgba(30,215,96,.4);
  --border-top-highlight:rgba(255,255,255,.10);

  /* text */
  --text-primary:#E8F5EE;
  --text-secondary:#9CB3A8;
  --text-muted:#5E7268;
  --text-on-accent:#06100C;

  /* brand */
  --accent:#1ED760;
  --accent-glow:#00FFA3;
  --accent-soft:rgba(30,215,96,.12);
  --danger:#FF5470;
  --danger-strong:#FF2D55;

  /* shadows */
  --shadow-card:0 24px 48px -12px rgba(0,0,0,.6);
  --shadow-card-hover:0 32px 60px -12px rgba(0,0,0,.7),0 0 40px -8px rgba(0,255,163,.25);
  --shadow-cta:0 8px 32px -8px rgba(30,215,96,.5);

  /* grid */
  --grid-line:rgba(30,215,96,.06);

  /* radii */
  --r-xs:4px; --r-sm:8px; --r-md:14px; --r-lg:18px; --r-xl:22px; --r-pill:999px;

  /* spacing */
  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s5:24px; --s6:32px; --s7:48px; --s8:72px;

  /* type scale */
  --t-2xs:10px; --t-xs:11px; --t-sm:13px; --t-base:15px; --t-md:17px;
  --t-lg:20px; --t-xl:24px; --t-2xl:32px; --t-3xl:44px; --t-4xl:64px; --t-display:96px;

  --lh-tight:1.05; --lh-snug:1.2; --lh-normal:1.5; --lh-relaxed:1.6; --lh-loose:1.8;

  /* fonts */
  --font-sans:"IBM Plex Sans","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-display:"HarmonyOS Sans SC","IBM Plex Sans","PingFang SC",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","SF Mono",ui-monospace,Menlo,Consolas,monospace;

  /* motion */
  --ease-out:cubic-bezier(.2,.8,.2,1);
  --ease-spring:cubic-bezier(.34,1.56,.64,1);
  --dur-fast:180ms;
  --dur-base:320ms;
  --dur-slow:600ms;

  /* layout */
  --container:1200px;

  /* hero geometry */
  --hero-ring-outer:360px;
  --hero-ring-inner:240px;
  --hero-core:120px;
  --hero-glow:460px;
  --hero-orbit-r:180px;
  --hero-node:48px;
  --orbit-dur:28s;
  --breath-dur:4s;

  /* section padding */
  --pad-xs:64px;
  --pad-sm:96px;
  --pad-md:128px;
  --pad-lg:160px;
}

[data-theme="light"]{
  --bg-base:#F7FBF8;
  --bg-elevated:#FFFFFF;
  --bg-card:rgba(255,255,255,.7);
  --bg-card-strong:rgba(255,255,255,.92);
  --bg-card-hover:rgba(30,215,96,.06);
  --bg-code:#0F1A15;          /* keep dark for code readability */
  --bg-pill:rgba(255,255,255,.85);

  --border-subtle:rgba(0,0,0,.08);
  --border-soft:rgba(0,0,0,.05);
  --border-strong:rgba(30,215,96,.5);
  --border-top-highlight:rgba(255,255,255,.6);

  --text-primary:#0A1410;
  --text-secondary:#5A6B63;
  --text-muted:#8A9A92;

  --accent:#13A84B;
  --accent-glow:#1ED760;
  --accent-soft:rgba(30,215,96,.1);

  --shadow-card:0 8px 24px -8px rgba(0,0,0,.08);
  --shadow-card-hover:0 16px 40px -12px rgba(0,0,0,.14),0 0 32px -8px rgba(30,215,96,.18);
  --shadow-cta:0 8px 28px -8px rgba(19,168,75,.4);

  --grid-line:rgba(30,215,96,.08);
}

/* ========================================================================
   2. Base layout
   ======================================================================== */

body{
  font-family:var(--font-sans);
  font-size:var(--t-base);
  line-height:var(--lh-relaxed);
  color:var(--text-primary);
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%,rgba(0,255,163,.08),transparent 60%),
    linear-gradient(var(--grid-line) 1px,transparent 1px) 0 0/64px 64px,
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px) 0 0/64px 64px,
    var(--bg-base);
  position:relative;
  transition:background-color var(--dur-base) var(--ease-out),color var(--dur-base) var(--ease-out);
}
[data-theme="light"] body{
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%,rgba(30,215,96,.08),transparent 60%),
    linear-gradient(var(--grid-line) 1px,transparent 1px) 0 0/64px 64px,
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px) 0 0/64px 64px,
    var(--bg-base);
}

/* noise overlay */
body::before{
  content:"";
  position:fixed;inset:0;
  pointer-events:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='.6'/></svg>");
  opacity:.04;
  mix-blend-mode:overlay;
  z-index:1;
}
[data-theme="light"] body::before{opacity:.025}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-inline:24px;
  position:relative;
  z-index:2;
}

section{position:relative;z-index:2}

/* ========================================================================
   3. Type utilities
   ======================================================================== */

.eyebrow{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  font-weight:600;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--accent);
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.eyebrow::before{
  content:"";
  width:24px;height:1px;
  background:currentColor;
  display:inline-block;
}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;letter-spacing:-.01em;margin:0}
h1{font-size:clamp(40px,7vw,64px);line-height:var(--lh-tight);letter-spacing:-.025em;font-weight:700}
h2{font-size:clamp(28px,4vw,44px);line-height:1.1;letter-spacing:-.02em}
h3{font-size:var(--t-xl);line-height:var(--lh-snug)}
h4{font-size:var(--t-lg);line-height:var(--lh-snug)}

.section-header{text-align:center;max-width:720px;margin:0 auto 56px}
.section-header .eyebrow{margin-bottom:16px}
.section-header h2{margin-bottom:16px}
.section-subtitle{
  font-size:var(--t-md);
  line-height:var(--lh-relaxed);
  color:var(--text-secondary);
  margin:0 auto;
  max-width:60ch;
}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.gradient-text{
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent-glow) 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

/* ========================================================================
   4. Buttons
   ======================================================================== */

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;
  border-radius:var(--r-pill);
  font-family:var(--font-sans);font-size:var(--t-sm);font-weight:600;
  letter-spacing:.01em;
  white-space:nowrap;
  transition:transform var(--dur-fast) var(--ease-out),
             box-shadow var(--dur-fast) var(--ease-out),
             background-color var(--dur-fast) var(--ease-out),
             border-color var(--dur-fast) var(--ease-out),
             color var(--dur-fast) var(--ease-out);
  cursor:pointer;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}

.btn-primary{
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent-glow) 100%);
  color:var(--text-on-accent);
  box-shadow:var(--shadow-cta);
}
.btn-primary:hover{box-shadow:0 12px 36px -8px rgba(0,255,163,.6)}

.btn-ghost{
  background:transparent;
  color:var(--text-primary);
  border:1px solid var(--border-subtle);
  backdrop-filter:blur(8px);
}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}

.btn-sm{height:36px;padding:0 16px;font-size:var(--t-xs)}
.btn-lg{height:54px;padding:0 28px;font-size:var(--t-base)}

.btn-arrow{transition:transform var(--dur-fast) var(--ease-out)}
.btn:hover .btn-arrow{transform:translateX(3px)}

/* ========================================================================
   5. Cards
   ======================================================================== */

.card{
  position:relative;
  border-radius:var(--r-lg);
  background:linear-gradient(180deg,var(--bg-card) 0%,rgba(10,15,13,.75) 100%);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border:1px solid var(--border-subtle);
  box-shadow:
    inset 0 1px 0 var(--border-top-highlight),
    var(--shadow-card);
  transition:transform var(--dur-base) var(--ease-out),
             box-shadow var(--dur-base) var(--ease-out),
             border-color var(--dur-base) var(--ease-out);
  padding:28px;
}
[data-theme="light"] .card{background:linear-gradient(180deg,var(--bg-card) 0%,rgba(247,251,248,.95) 100%)}

.card:hover{
  transform:translateY(-4px);
  border-color:var(--border-strong);
  box-shadow:
    inset 0 1px 0 var(--border-top-highlight),
    var(--shadow-card-hover);
}

.card-strong{
  border-radius:var(--r-xl);
  background:linear-gradient(180deg,var(--bg-card-strong) 0%,rgba(6,16,12,.95) 100%);
  backdrop-filter:blur(24px) saturate(160%);
  -webkit-backdrop-filter:blur(24px) saturate(160%);
}
[data-theme="light"] .card-strong{background:linear-gradient(180deg,var(--bg-card-strong) 0%,rgba(255,255,255,.98) 100%)}

.card-light{
  border-radius:var(--r-md);
  background:rgba(20,28,24,.4);
  backdrop-filter:blur(12px);
  border-color:var(--border-soft);
  padding:20px;
}
[data-theme="light"] .card-light{background:rgba(255,255,255,.6)}

.card-light:hover{transform:none;border-color:var(--border-strong)}

/* ========================================================================
   6. Navigation
   ======================================================================== */

#nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background-color var(--dur-base) var(--ease-out),
             backdrop-filter var(--dur-base) var(--ease-out),
             border-color var(--dur-base) var(--ease-out);
  border-bottom:1px solid transparent;
}
#nav.scrolled{
  background:rgba(10,15,13,.6);
  backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
  border-bottom-color:var(--border-subtle);
}
[data-theme="light"] #nav.scrolled{background:rgba(247,251,248,.7)}

.nav-wrap{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;
  height:72px;gap:32px;
  max-width:var(--container);margin:0 auto;padding:0 24px;
}

.brand{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-weight:700;font-size:var(--t-md);
  letter-spacing:-.01em;
}
.brand-mark{
  width:30px;height:30px;
  border-radius:var(--r-sm);
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent-glow) 100%);
  color:var(--text-on-accent);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-weight:800;font-size:var(--t-sm);
  box-shadow:0 0 16px -4px rgba(0,255,163,.5);
}
.brand-name{color:var(--text-primary)}

.nav-links{
  position:absolute;
  left:50%;top:50%;
  transform:translate(-50%,-50%);
  display:flex;align-items:center;gap:32px;
  pointer-events:auto;
}
.nav-links a{
  font-size:var(--t-sm);
  color:var(--text-secondary);
  font-weight:500;
  position:relative;
  transition:color var(--dur-fast) var(--ease-out);
}
.nav-links a::after{
  content:"";position:absolute;bottom:-6px;left:0;
  width:100%;height:1px;
  background:var(--accent);
  transform:scaleX(0);transform-origin:right;
  transition:transform var(--dur-base) var(--ease-out);
}
.nav-links a:hover{color:var(--text-primary)}
.nav-links a:hover::after{transform:scaleX(1);transform-origin:left}

.nav-actions{
  display:flex;align-items:center;gap:12px;
  margin-left:auto;
}

.icon-btn{
  width:36px;height:36px;
  border-radius:var(--r-sm);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-secondary);
  border:1px solid transparent;
  transition:color var(--dur-fast) var(--ease-out),
             background-color var(--dur-fast) var(--ease-out),
             border-color var(--dur-fast) var(--ease-out);
}
.icon-btn:hover{
  color:var(--accent);
  background:var(--accent-soft);
  border-color:var(--border-strong);
}
.icon-btn svg{width:18px;height:18px;stroke:currentColor;stroke-width:1.6;fill:none}

.lang-switch{
  display:flex;align-items:center;
  height:36px;
  border-radius:var(--r-pill);
  border:1px solid var(--border-subtle);
  padding:3px;
  font-family:var(--font-mono);font-size:var(--t-xs);font-weight:600;
}
.lang-switch button{
  height:28px;padding:0 12px;
  border-radius:var(--r-pill);
  color:var(--text-muted);
  transition:color var(--dur-fast) var(--ease-out),
             background-color var(--dur-fast) var(--ease-out);
}
.lang-switch button.active{
  background:var(--accent);
  color:var(--text-on-accent);
}

.nav-login{
  font-size:var(--t-sm);
  color:var(--text-secondary);
  font-weight:500;
  padding:0 6px;
  height:36px;display:inline-flex;align-items:center;
  transition:color var(--dur-fast) var(--ease-out);
}
.nav-login:hover{color:var(--accent)}

.nav-burger{display:none}

/* ========================================================================
   7. Hero
   ======================================================================== */

#hero{
  padding-block:var(--pad-lg) var(--pad-md);
  position:relative;
  overflow:hidden;
}
#hero::after{
  content:"";
  position:absolute;inset:0;
  background:repeating-linear-gradient(180deg,transparent 0,transparent 3px,rgba(0,255,163,.015) 3px,rgba(0,255,163,.015) 4px);
  pointer-events:none;z-index:1;
}
[data-theme="light"] #hero::after{display:none}

.hero-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:64px;
  align-items:center;
  position:relative;z-index:2;
}

.hero-content{text-align:center;max-width:880px;margin:0 auto}

.hero-badge{
  display:inline-flex;align-items:center;gap:10px;
  height:34px;padding:0 16px;
  border-radius:var(--r-pill);
  background:var(--accent-soft);
  border:1px solid var(--border-strong);
  font-family:var(--font-mono);font-size:var(--t-xs);font-weight:600;
  color:var(--accent);
  letter-spacing:.06em;
  margin-bottom:24px;
}
.hero-badge::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--accent-glow);
  box-shadow:0 0 8px var(--accent-glow);
  animation:pulse 1.6s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}

.hero-title{margin-bottom:24px}
.hero-title .line{display:block}
.hero-title .mono-token{
  font-family:var(--font-mono);
  font-weight:600;
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent-glow) 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
  letter-spacing:-.01em;
}

.hero-subtitle{
  font-size:var(--t-md);
  line-height:var(--lh-relaxed);
  color:var(--text-secondary);
  max-width:60ch;margin:0 auto 16px;
}
.hero-tagline{
  font-family:var(--font-mono);
  font-size:var(--t-sm);
  color:var(--accent);
  letter-spacing:.04em;
  margin-bottom:36px;
}
.hero-tagline span{margin:0 10px;color:var(--text-muted)}

.hero-cta{
  display:flex;flex-wrap:wrap;justify-content:center;gap:14px;
  margin-bottom:64px;
}

/* hero visual ring */
.hero-visual{
  width:var(--hero-ring-outer);height:var(--hero-ring-outer);
  position:relative;
  margin:32px auto 0;
}
.hero-visual::before{
  content:"";
  position:absolute;
  inset:50%;
  width:var(--hero-glow);height:var(--hero-glow);
  margin:calc(var(--hero-glow)/-2) 0 0 calc(var(--hero-glow)/-2);
  background:radial-gradient(circle,var(--accent-glow) 0%,transparent 60%);
  opacity:.55;
  filter:blur(40px);
  pointer-events:none;
  animation:breath var(--breath-dur) ease-in-out infinite;
}
[data-theme="light"] .hero-visual::before{opacity:.35}
@keyframes breath{0%,100%{transform:scale(1)}50%{transform:scale(1.06)}}

.ring-outer,.ring-inner,.ring-core{position:absolute;left:50%;top:50%;border-radius:50%;transform:translate(-50%,-50%)}
.ring-outer{
  width:var(--hero-ring-outer);height:var(--hero-ring-outer);
  border:1px solid rgba(30,215,96,.35);
  animation:ring-rotate 60s linear infinite;
}
.ring-outer::before{
  content:"";
  position:absolute;top:-3px;left:50%;
  width:6px;height:6px;border-radius:50%;
  background:var(--accent-glow);
  box-shadow:0 0 12px var(--accent-glow);
  transform:translateX(-50%);
}
.ring-inner{
  width:var(--hero-ring-inner);height:var(--hero-ring-inner);
  border:1px dashed rgba(30,215,96,.6);
  animation:ring-rotate 40s linear infinite reverse;
}
@keyframes ring-rotate{to{transform:translate(-50%,-50%) rotate(360deg)}}

.ring-core{
  width:var(--hero-core);height:var(--hero-core);
  background:var(--bg-base);
  border:1px solid var(--border-strong);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-weight:800;font-size:32px;
  color:var(--text-primary);
  letter-spacing:-.04em;
  box-shadow:0 0 40px -8px rgba(0,255,163,.6),inset 0 0 24px -8px rgba(0,255,163,.3);
}
.ring-core .core-c{color:var(--accent)}

.orbit-track{
  position:absolute;left:50%;top:50%;
  width:calc(var(--hero-orbit-r)*2);height:calc(var(--hero-orbit-r)*2);
  transform:translate(-50%,-50%);
  animation:ring-rotate var(--orbit-dur) linear infinite;
}
.orbit-node{
  position:absolute;
  width:var(--hero-node);height:var(--hero-node);
  border-radius:50%;
  background:var(--bg-elevated);
  border:1px solid var(--border-subtle);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 24px rgba(0,255,163,.45),inset 0 1px 0 var(--border-top-highlight);
  color:var(--text-primary);
}
.orbit-node svg{width:24px;height:24px;animation:counter-rotate var(--orbit-dur) linear infinite;fill:currentColor}
.orbit-node svg path{fill:currentColor}
@keyframes counter-rotate{from{transform:rotate(0)}to{transform:rotate(-360deg)}}

.orbit-node.n0{top:0;left:50%;margin:calc(var(--hero-node)/-2) 0 0 calc(var(--hero-node)/-2)}
.orbit-node.n1{top:50%;right:0;margin:calc(var(--hero-node)/-2) calc(var(--hero-node)/-2) 0 0}
.orbit-node.n2{bottom:0;left:50%;margin:0 0 calc(var(--hero-node)/-2) calc(var(--hero-node)/-2)}
.orbit-node.n3{top:50%;left:0;margin:calc(var(--hero-node)/-2) 0 0 calc(var(--hero-node)/-2)}

/* hero stats */
.hero-stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
  margin-top:80px;
  max-width:980px;
  margin-left:auto;margin-right:auto;
}
.stat-card{
  text-align:left;
  position:relative;overflow:hidden;
}
.stat-card::before{
  content:"";position:absolute;top:0;left:0;
  width:24px;height:1px;background:var(--accent);
}
.stat-value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:var(--t-3xl);
  font-weight:700;
  letter-spacing:-.025em;
  color:var(--text-primary);
  line-height:1;
  margin-bottom:8px;
}
.stat-value .unit{font-size:var(--t-lg);color:var(--accent);margin-left:4px;font-weight:600}
.stat-label{
  font-family:var(--font-mono);font-size:var(--t-xs);
  color:var(--text-muted);
  letter-spacing:.08em;text-transform:uppercase;
}

/* ========================================================================
   8. Brand marquee
   ======================================================================== */

#brands{
  padding-block:var(--pad-xs);
  border-top:1px solid var(--border-subtle);
  border-bottom:1px solid var(--border-subtle);
}
.brands-title{
  text-align:center;
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  color:var(--text-muted);
  letter-spacing:.16em;text-transform:uppercase;
  margin-bottom:32px;
}
.marquee{
  position:relative;
  overflow:hidden;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
}
.marquee-track{
  display:flex;
  gap:64px;
  width:max-content;
  animation:marquee 40s linear infinite;
}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes marquee{
  from{transform:translateX(0)}
  to{transform:translateX(-50%)}
}
.brand-item{
  display:flex;align-items:center;gap:10px;
  height:48px;
  color:var(--text-secondary);
  transition:color var(--dur-fast) var(--ease-out);
  font-family:var(--font-mono);
  font-size:var(--t-base);
  font-weight:600;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand-item:hover{color:var(--accent)}
.brand-item svg{width:24px;height:24px;stroke:currentColor;stroke-width:1.5;fill:none}

/* ========================================================================
   9. One-Key (4-card grid)
   ======================================================================== */

#one-key{padding-block:var(--pad-sm)}
.feature-grid-4{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.feature-card{
  display:flex;flex-direction:column;
  gap:14px;
  min-height:240px;
}
.feature-icon{
  width:44px;height:44px;
  border-radius:var(--r-sm);
  background:var(--accent-soft);
  border:1px solid var(--border-strong);
  display:flex;align-items:center;justify-content:center;
  color:var(--accent);
  margin-bottom:8px;
  position:relative;
}
.feature-icon::before{
  content:"";
  position:absolute;inset:-4px;
  border-radius:var(--r-md);
  background:radial-gradient(circle,var(--accent-glow),transparent 70%);
  opacity:.25;
  filter:blur(12px);
  z-index:-1;
}
.feature-icon svg{width:22px;height:22px;stroke:currentColor;stroke-width:1.6;fill:none}
.feature-card h3{font-size:var(--t-lg)}
.feature-card p{
  color:var(--text-secondary);
  font-size:var(--t-sm);
  line-height:var(--lh-relaxed);
  margin:0;
  flex:1;
}
.feature-link{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  color:var(--accent);
  letter-spacing:.06em;
  margin-top:auto;
  display:inline-flex;align-items:center;gap:6px;
}
.feature-link::after{content:"→";transition:transform var(--dur-fast) var(--ease-out)}
.feature-card:hover .feature-link::after{transform:translateX(3px)}

/* ========================================================================
   10. Models (4 flagship cards + table)
   ======================================================================== */

#models{padding-block:var(--pad-md)}
.model-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
  margin-bottom:48px;
}
.model-card{
  position:relative;
  padding:28px 28px 24px;
  display:flex;flex-direction:column;
  gap:16px;
  overflow:hidden;
}
.model-card::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--brand-color,var(--accent)),transparent);
  opacity:.6;
}
.model-card-head{
  display:flex;justify-content:space-between;align-items:flex-start;gap:16px;
}
.model-brand-row{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  color:var(--text-muted);
  letter-spacing:.08em;text-transform:uppercase;
}
.model-brand-logo{
  width:28px;height:28px;
  display:flex;align-items:center;justify-content:center;
  color:var(--brand-color,var(--accent));
}
.model-brand-logo svg{width:24px;height:24px;stroke:currentColor;stroke-width:1.5;fill:none}
.model-tags{display:flex;gap:6px;flex-wrap:wrap}
.tag-pill{
  font-family:var(--font-mono);
  font-size:var(--t-2xs);
  font-weight:600;
  padding:4px 8px;
  border-radius:var(--r-xs);
  border:1px solid currentColor;
  letter-spacing:.06em;
  text-transform:uppercase;
  white-space:nowrap;
}
.tag-pill.precision{color:#7AA9FF}
.tag-pill.fast{color:#FFC857}
.tag-pill.code{color:var(--accent)}

.model-name{font-size:var(--t-xl);line-height:1.2;margin-top:4px}
.model-id{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  color:var(--text-muted);
  letter-spacing:.04em;
}
.model-tagline{
  font-size:var(--t-sm);
  color:var(--text-secondary);
  line-height:var(--lh-relaxed);
}

.model-context{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:var(--t-xs);font-weight:600;
  padding:5px 12px;
  border-radius:var(--r-pill);
  background:var(--accent-soft);
  color:var(--accent);
  letter-spacing:.06em;
  align-self:flex-start;
}
.model-context::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 6px var(--accent);
}

.price-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
  padding-top:18px;
  border-top:1px dashed var(--border-subtle);
}
.price-block{display:flex;flex-direction:column;gap:6px}
.price-label{
  font-family:var(--font-mono);
  font-size:var(--t-2xs);
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--text-muted);
}
.price-main{display:flex;align-items:baseline;gap:6px}
.price-main .num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:var(--t-2xl);
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--text-primary);
  line-height:1;
}
.price-main .num::before{
  content:"¥";
  font-size:var(--t-md);
  color:var(--accent);
  margin-right:1px;
  font-weight:500;
}
.price-main .unit{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  color:var(--text-muted);
}
.price-meta{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.price-official{
  font-family:var(--font-mono);
  font-size:var(--t-sm);
  color:var(--text-muted);
  text-decoration:line-through;
  text-decoration-color:var(--danger);
  text-decoration-thickness:1.5px;
  font-variant-numeric:tabular-nums;
}
.save-badge{
  font-family:var(--font-mono);
  font-size:var(--t-2xs);
  font-weight:700;
  padding:3px 6px;
  border-radius:var(--r-xs);
  background:linear-gradient(135deg,var(--danger) 0%,var(--danger-strong) 100%);
  color:#fff;
  letter-spacing:.06em;
}

.model-actions{display:flex;gap:10px;padding-top:8px}

/* table */
.model-table-wrap{
  border-radius:var(--r-lg);
  border:1px solid var(--border-subtle);
  overflow:hidden;
  background:var(--bg-card);
  backdrop-filter:blur(12px);
}
.model-table-toggle{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 24px;
  font-family:var(--font-mono);
  font-size:var(--t-sm);
  color:var(--text-secondary);
  letter-spacing:.04em;
  border-bottom:1px solid transparent;
  transition:color var(--dur-fast) var(--ease-out),
             border-color var(--dur-base) var(--ease-out);
}
.model-table-toggle:hover{color:var(--accent)}
.model-table-toggle::after{
  content:"+";
  font-size:var(--t-md);
  color:var(--accent);
  transition:transform var(--dur-base) var(--ease-out);
}
.model-table-wrap.open .model-table-toggle::after{transform:rotate(45deg)}
.model-table-wrap.open .model-table-toggle{border-bottom-color:var(--border-subtle)}
.model-table-body{
  max-height:0;overflow:hidden;
  transition:max-height var(--dur-slow) var(--ease-out);
}
.model-table-wrap.open .model-table-body{max-height:520px}

.model-table{width:100%;border-collapse:collapse}
.model-table th,.model-table td{
  padding:14px 24px;
  text-align:left;
  font-size:var(--t-sm);
  border-bottom:1px solid var(--border-soft);
}
.model-table th{
  font-family:var(--font-mono);
  font-size:var(--t-2xs);
  font-weight:600;
  color:var(--text-muted);
  letter-spacing:.1em;
  text-transform:uppercase;
}
.model-table td{color:var(--text-secondary)}
.model-table tr:last-child td{border-bottom:0}
.model-table .col-price{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--text-primary);font-weight:600}

/* ========================================================================
   11. Why (6-card grid)
   ======================================================================== */

#why{padding-block:var(--pad-sm)}
.why-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.why-card{
  position:relative;
  padding:24px;
}
.why-card .num{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  color:var(--accent);
  letter-spacing:.12em;
  margin-bottom:14px;
  display:flex;align-items:center;gap:8px;
}
.why-card .num::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 8px var(--accent);
}
.why-card h3{font-size:var(--t-lg);margin-bottom:8px}
.why-card p{color:var(--text-secondary);font-size:var(--t-sm);line-height:var(--lh-relaxed);margin:0}

/* ========================================================================
   12. Quickstart
   ======================================================================== */

#quickstart{padding-block:var(--pad-md) var(--pad-sm)}
.steps{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  position:relative;
}
.step{
  position:relative;
  display:flex;flex-direction:column;
  gap:16px;
}
.step-num{
  font-family:var(--font-mono);
  font-size:80px;
  font-weight:700;
  line-height:1;
  letter-spacing:-.05em;
  background:linear-gradient(180deg,var(--accent) 0%,transparent 90%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
  margin-bottom:-16px;
}
.step h3{font-size:var(--t-lg)}
.step p{color:var(--text-secondary);font-size:var(--t-sm);line-height:var(--lh-relaxed);margin:0}
.step-snippet{
  font-family:var(--font-mono);
  font-size:var(--t-sm);
  background:var(--bg-code);
  color:#A8E6BD;
  padding:10px 14px;
  border-radius:var(--r-sm);
  border:1px solid var(--border-subtle);
  margin-top:8px;
  word-break:break-all;
}
.step-snippet .key{color:var(--accent-glow)}
.step-snippet .str{color:#FFC857}

/* ========================================================================
   13. Code demo
   ======================================================================== */

#code-demo{padding-block:var(--pad-md)}
.code-block{
  max-width:920px;margin:0 auto;
  border-radius:var(--r-xl);
  background:var(--bg-code);
  border:1px solid var(--border-subtle);
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.code-bar{
  display:flex;align-items:center;
  padding:12px 16px;
  border-bottom:1px solid rgba(255,255,255,.06);
  background:rgba(255,255,255,.02);
}
.code-dots{display:flex;gap:6px}
.code-dots span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.2)}
.code-dots span:nth-child(1){background:#FF5F57}
.code-dots span:nth-child(2){background:#FEBC2E}
.code-dots span:nth-child(3){background:#28C840}
.code-path{
  margin:0 16px;
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  color:rgba(232,245,238,.5);
  letter-spacing:.04em;
  flex:1;
  text-align:center;
}
.code-tabs{
  display:flex;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.code-tab{
  padding:14px 20px;
  font-family:var(--font-mono);
  font-size:var(--t-sm);
  font-weight:600;
  color:rgba(232,245,238,.5);
  position:relative;
  transition:color var(--dur-fast) var(--ease-out);
}
.code-tab:hover{color:#E8F5EE}
.code-tab.active{color:var(--accent-glow)}
.code-tab.active::after{
  content:"";
  position:absolute;left:16px;right:16px;bottom:-1px;
  height:2px;background:var(--accent-glow);
  box-shadow:0 0 12px var(--accent-glow);
}
.code-copy{
  margin-left:auto;
  padding:8px 14px;
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  color:rgba(232,245,238,.6);
  border-left:1px solid rgba(255,255,255,.06);
  display:flex;align-items:center;gap:6px;
  transition:color var(--dur-fast) var(--ease-out);
}
.code-copy:hover{color:var(--accent-glow)}
.code-panel{display:none;padding:24px 28px}
.code-panel.active{display:block}
.code-panel pre{
  margin:0;
  font-family:var(--font-mono);
  font-size:var(--t-sm);
  line-height:1.7;
  color:#E8F5EE;
  overflow-x:auto;
}
.code-panel .kw{color:#7AA9FF}
.code-panel .str{color:#FFC857}
.code-panel .com{color:#5E7268;font-style:italic}
.code-panel .fn{color:var(--accent-glow)}
.code-panel .n{color:#FF8C9C}

.copy-toast{
  position:fixed;bottom:32px;left:50%;
  transform:translateX(-50%) translateY(20px);
  padding:10px 18px;
  border-radius:var(--r-pill);
  background:var(--accent);
  color:var(--text-on-accent);
  font-family:var(--font-mono);font-size:var(--t-sm);font-weight:600;
  box-shadow:0 8px 32px -8px rgba(0,255,163,.5);
  opacity:0;
  pointer-events:none;
  transition:opacity var(--dur-base) var(--ease-out),transform var(--dur-base) var(--ease-spring);
  z-index:200;
}
.copy-toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ========================================================================
   14. Testimonials
   ======================================================================== */

#testimonials{padding-block:var(--pad-sm)}
.testimonials-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.testimonial{padding:28px;display:flex;flex-direction:column;gap:18px}
.testimonial-quote{
  font-size:var(--t-md);
  line-height:var(--lh-relaxed);
  color:var(--text-primary);
  position:relative;
  flex:1;
}
.testimonial-quote::before{
  content:"\201C";
  position:absolute;top:-24px;left:-6px;
  font-family:var(--font-display);
  font-size:48px;
  line-height:1;
  color:var(--accent);
  opacity:.4;
}
.testimonial-author{
  display:flex;align-items:center;gap:12px;
  padding-top:16px;
  border-top:1px solid var(--border-subtle);
}
.author-avatar{
  width:42px;height:42px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent-glow) 100%);
  color:var(--text-on-accent);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-weight:700;font-size:var(--t-sm);
  letter-spacing:-.02em;
}
.author-info{display:flex;flex-direction:column;gap:2px}
.author-name{font-weight:600;font-size:var(--t-sm)}
.author-role{font-family:var(--font-mono);font-size:var(--t-xs);color:var(--text-muted);letter-spacing:.04em}

/* ========================================================================
   15. CTA bottom
   ======================================================================== */

#cta{
  padding-block:var(--pad-lg);
  position:relative;
  overflow:hidden;
}
#cta::before{
  content:"";
  position:absolute;top:50%;left:50%;
  width:1000px;height:1000px;
  margin:-500px 0 0 -500px;
  background:radial-gradient(circle,var(--accent-glow) 0%,transparent 60%);
  opacity:.15;filter:blur(60px);
  pointer-events:none;
}
[data-theme="light"] #cta::before{opacity:.18}
.cta-inner{
  text-align:center;
  max-width:720px;margin:0 auto;
  position:relative;z-index:2;
}
.cta-inner h2{margin-bottom:16px}
.cta-inner p{
  font-size:var(--t-md);
  color:var(--text-secondary);
  margin:0 0 36px;
}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}

/* ========================================================================
   16. Footer
   ======================================================================== */

#footer{
  padding-block:var(--pad-md) var(--pad-sm);
  border-top:1px solid var(--border-subtle);
  position:relative;
  overflow:hidden;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:48px;
  margin-bottom:64px;
}
.footer-col h4{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  color:var(--text-muted);
  letter-spacing:.14em;
  text-transform:uppercase;
  font-weight:600;
  margin-bottom:20px;
}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{
  font-size:var(--t-sm);
  color:var(--text-secondary);
  transition:color var(--dur-fast) var(--ease-out);
}
.footer-col a:hover{color:var(--accent)}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-brand .brand{margin-bottom:4px}
.footer-slogan{
  font-size:var(--t-sm);
  color:var(--text-secondary);
  line-height:var(--lh-relaxed);
  max-width:32ch;
}
.footer-icp{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  color:var(--text-muted);
  letter-spacing:.04em;
}
.footer-bar{
  display:flex;justify-content:space-between;align-items:center;
  padding-top:32px;
  border-top:1px solid var(--border-subtle);
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  color:var(--text-muted);
  letter-spacing:.04em;
  flex-wrap:wrap;gap:16px;
}
.footer-socials{display:flex;gap:14px}
.footer-socials a{
  width:32px;height:32px;
  display:flex;align-items:center;justify-content:center;
  border-radius:var(--r-sm);
  border:1px solid var(--border-subtle);
  color:var(--text-secondary);
  transition:color var(--dur-fast) var(--ease-out),
             border-color var(--dur-fast) var(--ease-out);
}
.footer-socials a:hover{color:var(--accent);border-color:var(--accent)}
.footer-socials svg{width:16px;height:16px;stroke:currentColor;stroke-width:1.6;fill:none}

.footer-wordmark{
  font-family:var(--font-mono);
  font-weight:800;
  font-size:clamp(80px,16vw,200px);
  line-height:1;
  letter-spacing:-.05em;
  text-align:center;
  background:linear-gradient(180deg,rgba(30,215,96,.18) 0%,transparent 80%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
  margin-top:48px;
  user-select:none;
  pointer-events:none;
}
[data-theme="light"] .footer-wordmark{background:linear-gradient(180deg,rgba(19,168,75,.22) 0%,transparent 80%);background-clip:text;-webkit-background-clip:text}

/* ========================================================================
   17. Reveal-on-scroll
   ======================================================================== */

.reveal{
  opacity:0;
  transform:translateY(28px);
  transition:opacity .7s var(--ease-out),transform .7s var(--ease-out);
}
.reveal.is-visible{opacity:1;transform:translateY(0)}

.reveal-stagger > *{
  opacity:0;
  transform:translateY(20px);
  transition:opacity .6s var(--ease-out),transform .6s var(--ease-out);
}
.reveal-stagger.is-visible > *{opacity:1;transform:translateY(0)}
.reveal-stagger.is-visible > *:nth-child(1){transition-delay:0ms}
.reveal-stagger.is-visible > *:nth-child(2){transition-delay:80ms}
.reveal-stagger.is-visible > *:nth-child(3){transition-delay:160ms}
.reveal-stagger.is-visible > *:nth-child(4){transition-delay:240ms}
.reveal-stagger.is-visible > *:nth-child(5){transition-delay:320ms}
.reveal-stagger.is-visible > *:nth-child(6){transition-delay:400ms}

/* ========================================================================
   18. Responsive
   ======================================================================== */

@media (max-width:1024px){
  :root{
    --hero-ring-outer:300px;
    --hero-ring-inner:200px;
    --hero-core:100px;
    --hero-glow:380px;
    --hero-orbit-r:150px;
    --hero-node:42px;
  }
  .feature-grid-4{grid-template-columns:repeat(2,1fr)}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .testimonials-grid{grid-template-columns:1fr;max-width:600px;margin:0 auto}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .nav-links{display:none}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:768px){
  :root{
    --pad-xs:48px;
    --pad-sm:64px;
    --pad-md:88px;
    --pad-lg:112px;
    --hero-ring-outer:260px;
    --hero-ring-inner:170px;
    --hero-core:84px;
    --hero-glow:320px;
    --hero-orbit-r:130px;
    --hero-node:38px;
  }
  .container{padding-inline:18px}
  .nav-wrap{height:60px;padding:0 18px;gap:12px}
  .brand-name{display:none}
  .nav-actions{gap:6px}
  .lang-switch button{padding:0 8px}
  .nav-actions .btn-sm{display:none}
  .hero-cta{flex-direction:column;align-items:stretch;width:100%;max-width:280px;margin:0 auto 48px}
  .hero-cta .btn{width:100%}
  .model-grid{grid-template-columns:1fr}
  .feature-grid-4{grid-template-columns:1fr}
  .why-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;margin-bottom:48px}
  .footer-bar{flex-direction:column;align-items:flex-start;text-align:left}
  .price-row{grid-template-columns:1fr;gap:18px}
  .code-tabs{flex-wrap:wrap}
  .code-copy{border-left:0;border-top:1px solid rgba(255,255,255,.06);width:100%;justify-content:center}
  .code-panel{padding:18px}
  .code-panel pre{font-size:var(--t-xs)}
  .step-num{font-size:64px}
  .footer-wordmark{margin-top:24px}
  .hero-stats{margin-top:56px}
  h1{font-size:clamp(34px,8vw,48px)}
  h2{font-size:clamp(26px,6vw,34px)}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .marquee-track{animation:none;transform:translateX(-25%)}
  .ring-outer,.ring-inner,.orbit-track,.orbit-node svg{animation:none}
  .hero-visual::before{animation:none}
}