/* =============================================================
   SKY PORCH · 2026 bright · aurora + glass
   Palette: sky-50 wash / glass / ink text / violet+coral accents
   ============================================================= */

:root{
  /* Colors */
  --ink:        #0e1220;
  --ink-soft:   #1f2436;
  --muted:      #5b6275;
  --faint:      #8a90a3;
  --line:       rgba(14,18,32,0.08);
  --line-2:     rgba(14,18,32,0.14);

  --paper:      #fafbfd;
  --glass:      rgba(255,255,255,0.55);
  --glass-s:    rgba(255,255,255,0.72);
  --glass-br:   rgba(255,255,255,0.85);

  /* Accents (Sky Porch aurora) */
  --c-sky:      #3157d5;
  --c-violet:   #9a6cff;
  --c-coral:    #ff8a5b;
  --c-mint:     #25c19b;
  --c-amber:    #f5b042;

  /* Type */
  --font-sans:  -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,ui-sans-serif,system-ui,sans-serif;
  --font-mono:  ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;

  /* Radii */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-xl: 22px;
  --r-2xl: 28px;

  /* Shadows */
  --sh-soft: 0 20px 40px -20px rgba(14,18,32,0.18);
  --sh-glass: 0 1px 0 rgba(255,255,255,0.9) inset, 0 20px 50px -20px rgba(14,18,32,0.18);
  --sh-ink:   0 14px 30px -10px rgba(14,18,32,0.4);

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-inout: cubic-bezier(0.45, 0, 0.55, 1);
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{
  font-family: var(--font-sans);
  color: var(--ink);
  background: #eef4ff;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body{min-height:100vh;overflow-x:hidden;position:relative}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
.feat-card h3 a,.proj-card h3 a{text-decoration:none;color:inherit}
::selection{background:var(--c-sky);color:#fff}

.wrap{max-width:1360px;margin:0 auto;padding:0 48px;position:relative}

/* ============ Aurora background (fixed) ============ */
.aurora{
  position: fixed; inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
  background: linear-gradient(180deg, #eef4ff 0%, #f6f1ff 50%, #fff3ec 100%);
}
.blob{position:absolute;border-radius:50%;filter:blur(70px);will-change:transform}
.blob-1{top:-160px;left:-140px;width:720px;height:720px;
  background:radial-gradient(circle, #7ab7ff 0%, rgba(122,183,255,0) 65%);opacity:.75;
  animation:float1 24s var(--ease-inout) infinite;}
.blob-2{top:160px;right:-220px;width:860px;height:860px;
  background:radial-gradient(circle, #d09bff 0%, rgba(208,155,255,0) 65%);opacity:.55;
  animation:float2 28s var(--ease-inout) infinite;}
.blob-3{bottom:-280px;left:18%;width:780px;height:780px;
  background:radial-gradient(circle, #ffc9a3 0%, rgba(255,201,163,0) 65%);opacity:.5;
  animation:float3 32s var(--ease-inout) infinite;}
.grain{
  position:absolute;inset:0;opacity:.5;pointer-events:none;mix-blend-mode:multiply;
  background:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence baseFrequency='0.9'/></filter><rect width='120' height='120' filter='url(%23n)' opacity='0.22'/></svg>");
}
@keyframes float1{0%,100%{transform:translate(0,0)}50%{transform:translate(40px,30px)}}
@keyframes float2{0%,100%{transform:translate(0,0)}50%{transform:translate(-30px,20px)}}
@keyframes float3{0%,100%{transform:translate(0,0)}50%{transform:translate(20px,-30px)}}

/* ============ Topbar ============ */
.topbar-wrap{
  position: sticky; top: 16px; z-index: 50;
  padding: 0 48px;
}
.topbar{
  max-width: 1360px; margin: 0 auto;
  display: flex; align-items: center; gap: 8px;
  height: 64px; padding: 6px 10px;
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--glass-br);
  border-radius: 20px;
  box-shadow: var(--sh-glass);
}
.brand{
  display:flex;align-items:center;gap:10px;
  padding: 6px 12px 6px 6px;
}
.brand-mark{
  width:40px;height:40px;border-radius:12px;
  background:#fff;
  display:grid;place-items:center;
  box-shadow: 0 6px 14px -4px rgba(71,112,255,0.35);
  overflow:hidden;
}
.brand-mark img{max-width:80%;max-height:80%;width:auto;height:auto;object-fit:contain;display:block}
.brand-txt{display:flex;flex-direction:column;line-height:1.15;gap:2px}
.brand-zh{font-size:13px;font-weight:700;color:var(--ink);letter-spacing:.02em}
.brand-en{font-size:10px;font-family:var(--font-mono);letter-spacing:.22em;color:var(--muted);text-transform:uppercase}
.topnav{display:flex;gap:4px;margin-left:20px}
.nl{
  padding:10px 16px;font-size:13px;font-weight:500;color:var(--muted);
  border-radius:12px;border:1px solid transparent;
  transition: color 150ms var(--ease-out), background 150ms var(--ease-out), border-color 150ms var(--ease-out);
}
.nl:hover{color:var(--ink);background:rgba(255,255,255,0.45)}
.nl.active{color:var(--ink);background:var(--glass-s);border-color:rgba(255,255,255,0.9);
  box-shadow: 0 4px 10px -4px rgba(14,18,32,0.12);}
.topright{margin-left:auto;display:flex;align-items:center;gap:10px;padding-right:6px}

.lang-pill{
  display:flex;align-items:center;padding:3px;
  background:rgba(255,255,255,0.5);
  border:1px solid rgba(255,255,255,0.85);
  border-radius: 12px;
  font-family: var(--font-mono);
}
.lang-pill button,
.lang-pill a{
  display:inline-block;
  padding:6px 9px;font-size:10.5px;letter-spacing:.1em;color:var(--muted);
  border-radius:8px;transition: all 150ms var(--ease-out);
  text-decoration:none;line-height:1;
}
.lang-pill button.active,
.lang-pill a.active{background:var(--ink);color:#fff;font-weight:600}
.lang-pill button:hover:not(.active),
.lang-pill a:hover:not(.active){color:var(--ink)}

.cta-ghost{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;font-size:13px;font-weight:500;color:var(--ink);
  background: var(--glass-s);
  border:1px solid rgba(255,255,255,0.9);
  border-radius:12px;
  transition: transform 150ms var(--ease-out), box-shadow 150ms var(--ease-out);
}
.cta-ghost:hover{transform:translateY(-1px);box-shadow:var(--sh-soft)}
.ic-sm{width:14px;height:14px}
.ic{width:22px;height:22px}

/* ============ Hero ============ */
.hero{padding: 96px 0 64px}
.hero-meta{display:flex;align-items:center;gap:14px;margin-bottom:28px;flex-wrap:wrap}
.chip-glass{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 14px;
  background: var(--glass-s);
  border:1px solid rgba(255,255,255,0.9);
  backdrop-filter: blur(16px);
  border-radius:999px;
  font-size:12px;font-weight:500;color:var(--ink);
  box-shadow: 0 6px 14px -6px rgba(14,18,32,0.15);
}
.chip-dot{width:6px;height:6px;border-radius:50%;background:var(--c-sky);box-shadow:0 0 0 3px rgba(71,112,255,0.2)}
.coord{font-size:12px;color:var(--muted);font-family:var(--font-mono);letter-spacing:.1em}

.hero-title{
  font-size: clamp(48px, 7.2vw, 104px);
  line-height: .98;
  letter-spacing: -0.035em;
  font-weight: 700;
  color: var(--ink);
  max-width: 1200px;
  text-wrap: balance;
}
.grad{
  background: linear-gradient(
    90deg,
    var(--c-sky) 0%,
    var(--c-violet) 25%,
    var(--c-coral) 50%,
    var(--c-mint) 75%,
    var(--c-sky) 100%
  );
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: gradFlow 8s linear infinite;
}
.grad-soft{
  background: linear-gradient(
    90deg,
    var(--c-sky) 0%,
    var(--c-violet) 50%,
    var(--c-sky) 100%
  );
  background-size: 200% 100%;
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color: transparent;color:transparent;
  animation: gradFlow 10s linear infinite;
}
@keyframes gradFlow{
  0%   { background-position:   0% 50%; }
  100% { background-position: 300% 50%; }
}
@media (prefers-reduced-motion: reduce){
  .grad, .grad-soft { animation: none; }
}
.hero-sub{
  margin-top: 22px;
  font-size: 18px;line-height: 1.65;color: var(--muted);
  max-width: 640px;
}
.hero-sub b{color:var(--ink);font-weight:600}

.hero-cta{margin-top:36px;display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.btn-ink{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 22px;background:var(--ink);color:#fff;
  border-radius:14px;font-size:14px;font-weight:600;
  box-shadow: var(--sh-ink);
  transition: transform 150ms var(--ease-out), box-shadow 150ms var(--ease-out);
}
.btn-ink:hover{transform:translateY(-1px);box-shadow:0 20px 40px -10px rgba(14,18,32,0.5)}
.btn-glass{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 22px;
  background: var(--glass-s);
  backdrop-filter: blur(16px);
  border:1px solid rgba(255,255,255,0.9);
  border-radius:14px;font-size:14px;font-weight:500;color:var(--ink);
  transition: transform 150ms var(--ease-out), box-shadow 150ms var(--ease-out);
}
.btn-glass:hover{transform:translateY(-1px);box-shadow:var(--sh-soft)}

.btn-aioa{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 22px;
  background: linear-gradient(135deg, var(--c-sky), var(--c-violet));
  color:#fff;border-radius:14px;font-size:14px;font-weight:600;
  box-shadow: 0 10px 24px -8px rgba(71,112,255,0.5);
  transition: transform 150ms var(--ease-out), box-shadow 150ms var(--ease-out);
}
.btn-aioa:hover{transform:translateY(-1px);box-shadow:0 18px 36px -10px rgba(71,112,255,0.6)}

.client-stack{display:flex;align-items:center;gap:14px;margin-left:18px}
.avatars{display:flex}
.avatars > *{
  width:34px;height:34px;border-radius:50%;
  border:2.5px solid #fff;
  box-shadow: 0 4px 10px -4px rgba(14,18,32,0.25);
  margin-left:-10px;
}
.avatars > *:first-child{margin-left:0}
.av-more{
  background:#fff;color:var(--ink);font-size:11px;font-weight:700;
  display:grid;place-items:center;font-family:var(--font-mono);letter-spacing:.04em;
}
.client-txt{font-size:12px;color:var(--muted);line-height:1.35}
.client-txt b{color:var(--ink);font-weight:600}

/* Metrics row */
.hero-metrics{
  margin-top: 96px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
}
.mc{
  padding: 24px 22px;
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  border:1px solid rgba(255,255,255,0.85);
  border-radius: 22px;
  box-shadow: var(--sh-glass);
  position: relative;
  transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out);
}
.mc:hover{transform:translateY(-3px);box-shadow:0 1px 0 rgba(255,255,255,0.9) inset, 0 30px 60px -20px rgba(14,18,32,0.25)}
.mc-dot{display:block;width:10px;height:10px;border-radius:50%;background:var(--c);box-shadow:0 0 0 5px color-mix(in srgb, var(--c) 22%, transparent);margin-bottom:14px}
.mc-v{font-size:30px;font-weight:700;letter-spacing:-0.02em;color:var(--ink);line-height:1}
.mc-k{font-size:13px;color:var(--ink);margin-top:8px;font-weight:500}
.mc-sub{font-size:11px;color:var(--muted);margin-top:3px;font-family:var(--font-mono);letter-spacing:.08em}

/* ============ Section head (shared) ============ */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:48px;flex-wrap:wrap}
.sec-head > div:first-child{max-width:720px}
.sec-lbl{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted);margin-bottom:18px;
}
.sec-num{
  display:inline-grid;place-items:center;
  padding:3px 8px;border-radius:999px;
  background:var(--ink);color:#fff;font-weight:600;
}
.sec-title{
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 14px;
  text-wrap: balance;
}
.sec-sub{font-size:15px;color:var(--muted);max-width:640px;line-height:1.65}
.sec-nav{font-family:var(--font-mono);font-size:11px;color:var(--muted);letter-spacing:.14em}
.sec-nav span{color:var(--ink);font-weight:600}

/* ============ Features ============ */
.features{padding: 96px 0 96px}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feat-card{
  padding: 36px 32px 32px;
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  border:1px solid rgba(255,255,255,0.85);
  border-radius: var(--r-2xl);
  box-shadow: var(--sh-glass);
  position:relative;
  display:flex;flex-direction:column;
  min-height: 320px;
  transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out);
  overflow: hidden;
}
.feat-card::before{
  content:'';position:absolute;inset:0;
  background: linear-gradient(135deg, color-mix(in srgb, var(--tint) 10%, transparent), transparent 50%);
  pointer-events:none;
}
.feat-card:hover{transform:translateY(-3px);box-shadow:0 1px 0 rgba(255,255,255,0.9) inset, 0 40px 80px -30px rgba(14,18,32,0.3)}
.feat-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;position:relative}
.feat-ic{
  width:52px;height:52px;border-radius:14px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--tint) 18%, #fff), rgba(255,255,255,0.8));
  border:1px solid rgba(255,255,255,0.9);
  display:grid;place-items:center;
  color: var(--tint);
  box-shadow: 0 8px 18px -8px color-mix(in srgb, var(--tint) 60%, transparent);
}
.feat-num{font-family:var(--font-mono);font-size:11px;color:var(--faint);letter-spacing:.16em}
.feat-card h3{font-size:22px;font-weight:700;color:var(--ink);letter-spacing:-0.01em;margin-bottom:10px;position:relative}
.feat-card p{font-size:14px;color:var(--muted);line-height:1.65;flex:1;position:relative}
.feat-tags{margin-top:22px;display:flex;flex-wrap:wrap;gap:6px;position:relative}
.feat-tags span{
  font-size:11px;padding:5px 10px;border-radius:999px;
  background:rgba(255,255,255,0.7);
  border:1px solid rgba(255,255,255,0.9);
  color:var(--ink-soft);
  font-weight:500;
}

/* ============ Projects ============ */
.projects{padding: 96px 0}
.proj-group{margin-bottom:64px}
.proj-group:last-child{margin-bottom:0}
.proj-group-head{
  display:flex;align-items:center;gap:14px;
  margin-bottom:24px;padding-bottom:14px;
  border-bottom:1px solid var(--line);
}
.pg-idx{font-family:var(--font-mono);font-size:11px;color:var(--c-sky);letter-spacing:.16em;font-weight:600}
.pg-title{font-size:14px;color:var(--ink);font-weight:600}
.pg-rule{flex:1;height:1px;background:var(--line)}
.pg-mono{font-family:var(--font-mono);font-size:11px;color:var(--muted);letter-spacing:.14em}

.proj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.proj-card{
  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(20px) saturate(160%);
  border:1px solid rgba(255,255,255,0.9);
  border-radius: var(--r-2xl);
  box-shadow: var(--sh-soft);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out);
}
.proj-card:hover{transform:translateY(-3px);box-shadow:0 40px 80px -30px rgba(14,18,32,0.3)}
.proj-head{
  position:relative;
  height: 150px;
  padding: 22px 24px;
  border-bottom:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:flex-start;
  overflow:hidden;
  background: linear-gradient(135deg, color-mix(in srgb, var(--tint) 20%, #fff) 0%, color-mix(in srgb, var(--tint) 8%, #fff) 60%, #fff 100%);
}
.proj-head::after{
  content:'';position:absolute;inset:0;pointer-events:none;
  background: radial-gradient(ellipse 260px 160px at 80% 10%, color-mix(in srgb, var(--tint) 30%, transparent), transparent 70%);
}
.ph-code{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;color:var(--ink);font-weight:600;z-index:1}
.ph-icon{
  width:58px;height:58px;border-radius:16px;
  background:rgba(255,255,255,0.85);
  backdrop-filter: blur(8px);
  border:1px solid rgba(255,255,255,0.95);
  display:grid;place-items:center;
  color: var(--tint);align-self:flex-end;
  box-shadow: 0 10px 22px -10px color-mix(in srgb, var(--tint) 60%, transparent);
  z-index:1;
}
.ph-icon .ic{width:26px;height:26px}
.proj-body{padding: 22px 24px 24px;flex:1;display:flex;flex-direction:column}
.proj-client{
  font-family:var(--font-mono);font-size:11px;
  color:var(--ink-soft);font-weight:600;letter-spacing:.06em;margin-bottom:8px;
}
.proj-body h3{font-size:18px;font-weight:700;color:var(--ink);line-height:1.35;margin-bottom:14px;letter-spacing:-0.005em}
.proj-tags{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:14px}
.proj-tags span{
  font-size:10.5px;padding:4px 9px;border-radius:999px;
  background: rgba(14,18,32,0.06);
  color: var(--ink-soft);
  font-weight:500;
}
.proj-body p{font-size:13px;color:var(--muted);line-height:1.65;flex:1}
.proj-body p b{color:var(--ink);font-weight:600}

/* ============ Ecosystem ============ */
.ecosystem{padding: 96px 0}
.eco-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.eco-card{
  padding:24px;
  background: rgba(255,255,255,0.65);
  backdrop-filter: blur(20px) saturate(160%);
  border:1px solid rgba(255,255,255,0.9);
  border-radius: var(--r-xl);
  box-shadow: var(--sh-soft);
  display:flex;flex-direction:column;gap:12px;
  transition: transform 200ms var(--ease-out);
}
.eco-card:hover{transform:translateY(-2px)}
.eco-logo{
  width:100%;height:72px;
  background:var(--ink);border-radius:12px;
  border:1px solid var(--ink);
  display:flex;align-items:center;justify-content:center;padding:10px 14px;
  box-sizing:border-box;overflow:hidden;
}
.eco-logo img{max-height:100%;max-width:100%;width:auto;height:auto;object-fit:contain;display:block}
.eco-tag{
  display:inline-block;align-self:flex-start;
  font-size:10.5px;font-family:var(--font-mono);letter-spacing:.1em;text-transform:uppercase;
  padding:3px 8px;border-radius:999px;
  background:rgba(71,112,255,0.1);color:var(--c-sky);
  font-weight:600;
}
.eco-card h3{font-size:17px;font-weight:700;color:var(--ink);line-height:1.3}
.eco-card p{font-size:13px;color:var(--muted);line-height:1.6}

/* ============ Clients ============ */
.clients{padding: 96px 0}
.client-grid{
  display:grid;grid-template-columns:repeat(6,1fr);gap:12px;
}
.cli{
  aspect-ratio: 1.6/1;
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(16px);
  border:1px solid rgba(255,255,255,0.9);
  border-radius:16px;
  display:grid;place-items:center;padding:16px;
  transition: all 200ms var(--ease-out);
}
.cli:hover{background:#fff;transform:translateY(-2px);box-shadow:var(--sh-soft)}
.cli img{max-height:56px;max-width:100%;object-fit:contain;filter:grayscale(1);opacity:.65;transition:all 200ms var(--ease-out)}
.cli:hover img{filter:none;opacity:1}
.cli-more{
  color:var(--muted);font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;font-weight:600;
}

/* ============ CTA ============ */
.cta{padding:64px 0 96px}
.cta-card{
  padding:56px;
  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(28px) saturate(180%);
  border:1px solid rgba(255,255,255,0.95);
  border-radius: 32px;
  box-shadow: var(--sh-glass);
  display:grid;grid-template-columns: 1.3fr 1fr;gap:56px;
  position:relative;overflow:hidden;
}
.cta-card::before{
  content:'';position:absolute;top:-200px;right:-200px;
  width:600px;height:600px;border-radius:50%;
  background: radial-gradient(circle, rgba(154,108,255,0.25), transparent 65%);
  pointer-events:none;
}
.cta-left .sec-lbl{margin-bottom:18px}
.cta-title{
  font-size: clamp(32px, 3.6vw, 52px);
  line-height: 1.08;letter-spacing:-0.025em;font-weight:700;color:var(--ink);
  margin-bottom:16px;text-wrap:balance;
}
.cta-left > p{font-size:15px;color:var(--muted);max-width:500px;margin-bottom:28px}
.cta-actions{display:flex;gap:10px;flex-wrap:wrap}

.cta-right{display:flex;flex-direction:column;gap:18px;position:relative}
.qr-card{
  display:flex;gap:18px;align-items:center;
  padding:18px;
  background: rgba(255,255,255,0.85);
  border:1px solid rgba(255,255,255,0.95);
  border-radius:18px;
}
.qr-card img{width:84px;height:84px;border-radius:10px;background:#fff;padding:4px}
.qr-k{font-size:11px;font-family:var(--font-mono);letter-spacing:.14em;color:var(--muted);margin-bottom:4px;text-transform:uppercase}
.qr-v{font-size:14px;color:var(--ink);font-weight:600}

.contact-info{display:flex;flex-direction:column;gap:10px;padding:0 4px}
.ci-row{display:flex;gap:12px;align-items:flex-start;font-size:13px;color:var(--ink-soft);line-height:1.5}
.ci-row svg{color:var(--c-sky);flex-shrink:0;margin-top:2px}

/* ============ Footer ============ */
.foot{padding:64px 0 24px;border-top:1px solid var(--line)}
.foot-top{
  display:grid;grid-template-columns: 1.6fr 1fr 1fr 1fr;gap:48px;
  padding-bottom:48px;border-bottom:1px solid var(--line);
}
.foot-brand{display:flex;flex-direction:column;gap:16px}
.foot-brand .brand{padding:0}
.foot-brand .brand-zh{font-size:15px}
.foot-brand p{font-size:13px;color:var(--muted);line-height:1.65;max-width:360px}
.foot-col h2{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted);margin-bottom:18px;font-weight:500;
}
.foot-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.foot-col a,.foot-col span{font-size:13px;color:var(--ink-soft);transition:color 150ms}
.foot-col a:hover{color:var(--c-sky)}
.lang-list a.active{color:var(--ink);font-weight:600}
.foot-bot{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0 0;
  font-family:var(--font-mono);font-size:11px;color:var(--muted);letter-spacing:.04em;
}
.foot-bot a{color:var(--muted);transition:color 150ms}
.foot-bot a:hover{color:var(--c-sky)}
.foot-bot-r{display:flex;gap:16px;align-items:center}

/* ============ Responsive ============ */
@media (max-width:1100px){
  .topbar-wrap,.wrap{padding-left:24px;padding-right:24px}
  .feat-grid,.proj-grid,.eco-grid{grid-template-columns:1fr 1fr}
  .hero-metrics{grid-template-columns:1fr 1fr}
  .client-grid{grid-template-columns:repeat(4,1fr)}
  .cta-card{grid-template-columns:1fr;padding:40px}
  .foot-top{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:720px){
  .topbar-wrap{top:8px;padding:0 12px}
  .topbar{height:auto;flex-wrap:wrap;gap:6px;padding:8px}
  .topnav{display:none}
  .topright{width:100%;min-width:0;margin-left:0;justify-content:flex-end}
  .topright .lang-pill{width:100%;min-width:0;justify-content:space-between;overflow:hidden}
  .topright .lang-pill a{padding-left:7px;padding-right:7px}
  .topright .cta-ghost{display:none}
  .hero{padding:48px 0 32px}
  .hero-title{font-size:44px}
  .hero-metrics{grid-template-columns:1fr 1fr;margin-top:56px}
  .client-stack{margin-left:0;margin-top:12px}
  .features,.projects,.ecosystem,.clients{padding:64px 0}
  .feat-grid,.proj-grid,.eco-grid{grid-template-columns:1fr}
  .client-grid{grid-template-columns:repeat(3,1fr)}
  .foot-top{grid-template-columns:1fr}
  .foot-bot{flex-direction:column;gap:10px;align-items:flex-start}
  .sec-head{gap:14px}
  .cta-card{padding:32px 24px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important}
}