/* ============================================================
   AIWall / Matrix — design system
   Identity: governance graphite + signal amber. Structured,
   ruled, "routing" motifs. Dark by design. Zero dependencies.
   ============================================================ */

:root {
  /* surfaces */
  --bg: #0a0b0d;
  --bg-raise: #101214;
  --bg-panel: #131619;
  --bg-inset: #0d0f11;

  /* ink */
  --ink: #e9ecef;
  --ink-dim: #9aa3ad;
  --ink-faint: #5d6670;

  /* brand */
  --amber: #e8a33d;
  --amber-hi: #f5bd63;
  --amber-dim: rgba(232, 163, 61, 0.14);
  --jade: #43c98a;
  --jade-dim: rgba(67, 201, 138, 0.12);
  --route-blue: #5d9bd4;

  /* lines */
  --line: rgba(233, 236, 239, 0.09);
  --line-strong: rgba(233, 236, 239, 0.16);
  --line-amber: rgba(232, 163, 61, 0.35);

  /* type */
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  /* scale */
  --fs-xs: 0.8125rem;
  --fs-sm: 0.9375rem;
  --fs-md: 1.0625rem;
  --fs-lg: 1.375rem;
  --fs-xl: clamp(1.75rem, 1.2rem + 2.2vw, 2.5rem);
  --fs-hero: clamp(2.25rem, 1.4rem + 3.8vw, 3.9rem);

  --maxw: 1120px;
  --nav-h: 64px;
  --radius: 10px;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  font-size: var(--fs-md);
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection { background: rgba(232, 163, 61, 0.30); }

/* the wall: faint masonry ruling behind everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    repeating-linear-gradient(to bottom, transparent 0 95px, rgba(233,236,239,0.022) 95px 96px),
    repeating-linear-gradient(to right, transparent 0 159px, rgba(233,236,239,0.014) 159px 160px);
}
body > * { position: relative; z-index: 1; }

/* ---------- typography helpers ---------- */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.15; letter-spacing: -0.015em; }
.kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
  display: flex;
  align-items: center;
  gap: 10px;
}
.kicker::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--amber);
  opacity: 0.7;
}
.lede { color: var(--ink-dim); font-size: var(--fs-lg); line-height: 1.55; max-width: 42em; }
.muted { color: var(--ink-dim); }
.mono { font-family: var(--mono); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  background: rgba(10, 11, 13, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; }
.brand img { width: 28px; height: 28px; }
.brand .by {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border-left: 1px solid var(--line-strong);
  padding-left: 11px;
  margin-left: 2px;
}
.nav-links { display: flex; align-items: center; gap: 28px; font-size: var(--fs-sm); }
.nav-links a { color: var(--ink-dim); transition: color 0.15s; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-cta .signin { font-size: var(--fs-sm); color: var(--ink-dim); transition: color 0.15s; white-space: nowrap; }
.nav-cta .signin:hover { color: var(--ink); }

.menu-btn { display: none; padding: 8px; color: var(--ink-dim); }
.menu-btn svg { width: 22px; height: 22px; }

.drawer {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  z-index: 49;
  background: var(--bg-raise);
  border-bottom: 1px solid var(--line-strong);
  padding: 12px 24px 20px;
  flex-direction: column;
  gap: 4px;
}
.drawer.open { display: flex; }
.drawer a { padding: 11px 4px; color: var(--ink-dim); border-bottom: 1px solid var(--line); font-size: var(--fs-md); }
.drawer a:last-child { border-bottom: 0; }
.drawer .btn { margin-top: 10px; justify-content: center; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-sm);
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.15s;
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; flex: none; }
.btn-amber { background: var(--amber); color: #14100a; }
.btn-amber:hover { background: var(--amber-hi); transform: translateY(-1px); }
.btn-ghost { border-color: var(--line-strong); color: var(--ink); }
.btn-ghost:hover { border-color: var(--amber); color: var(--amber-hi); }
.btn-lg { padding: 13px 24px; font-size: var(--fs-md); border-radius: 9px; }

/* ---------- hero ---------- */
.hero { padding: clamp(64px, 10vh, 120px) 0 clamp(48px, 7vh, 88px); overflow: hidden; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 11fr) minmax(0, 9fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
.hero h1 { font-size: var(--fs-hero); margin: 18px 0 20px; }
.hero h1 .amber { color: var(--amber); }
.hero .lede { margin-bottom: 32px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 30px;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
}
.hero-meta strong { color: var(--ink-dim); font-weight: 500; }

/* routing board (hero visual) */
.route-board {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--bg-panel), var(--bg-inset));
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}
.route-board-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.route-board-bar .live { display: inline-flex; align-items: center; gap: 7px; color: var(--jade); }
.route-board-bar .live::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 8px var(--jade);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }
.route-board svg { width: 100%; height: auto; display: block; }

.route-line {
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-dasharray: 5 7;
  animation: routeflow 1.6s linear infinite;
}
@keyframes routeflow { to { stroke-dashoffset: -12; } }
.route-static { fill: none; stroke: var(--line-strong); stroke-width: 1.2; }
.node-box { fill: var(--bg-raise); stroke: var(--line-strong); rx: 6; }
.node-label { font-family: var(--mono); font-size: 8.5px; letter-spacing: 0.06em; fill: var(--ink-dim); }
.node-sub { font-family: var(--mono); font-size: 6.5px; letter-spacing: 0.08em; fill: var(--ink-faint); }

@media (prefers-reduced-motion: reduce) {
  .route-line, .route-board-bar .live::before { animation: none; }
  .viz-flow, .viz-pulse, .viz-asset, .viz-probe { animation: none; opacity: 1; }
  .viz-packet, .route-dot { animation: none; opacity: 0; }
  .viz-row, .viz-brick { animation: none; opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
}

/* ---------- sections ---------- */
.section { padding: clamp(56px, 9vh, 104px) 0; border-top: 1px solid var(--line); }
.section-head { max-width: 46em; margin-bottom: clamp(32px, 5vh, 56px); }
.section-head h2 { font-size: var(--fs-xl); margin: 14px 0 14px; }
.section-head p { color: var(--ink-dim); font-size: var(--fs-md); }

/* capability grid */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-inset);
}
.cap {
  padding: 30px 30px 32px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: background 0.2s;
}
.cap:nth-child(2n) { border-right: 0; }
.cap:nth-child(n+3) { border-bottom: 0; }
.cap:hover { background: var(--bg-panel); }
.cap .idx {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
}
.cap .icon {
  width: 40px; height: 40px;
  margin: 16px 0 16px;
  border: 1px solid var(--line-amber);
  border-radius: 9px;
  background: var(--amber-dim);
  display: grid;
  place-items: center;
}
.cap .icon svg { width: 20px; height: 20px; stroke: var(--amber); fill: none; stroke-width: 1.7; }
.cap h3 { font-size: var(--fs-lg); margin-bottom: 10px; }
.cap p { color: var(--ink-dim); font-size: var(--fs-sm); }

/* how it works — route / govern / deliver */
.flow-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  counter-reset: step;
}
.step {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  padding: 28px;
  position: relative;
}
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: var(--amber);
}
.step h3 { margin: 12px 0 10px; font-size: var(--fs-lg); }
.step h3 .mono-tag { font-family: var(--mono); font-weight: 500; font-size: 0.8em; color: var(--ink-faint); }
.step p { color: var(--ink-dim); font-size: var(--fs-sm); }
.step .step-arrow {
  position: absolute;
  right: -17px; top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  color: var(--amber);
  display: grid;
  place-items: center;
  width: 14px;
}
.step:last-child .step-arrow { display: none; }

/* audience cards */
.aud-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.aud {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  background: var(--bg-inset);
  transition: border-color 0.2s;
}
.aud:hover { border-color: var(--line-amber); }
.aud h3 { font-size: var(--fs-md); margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.aud h3::before { content: "▸"; color: var(--amber); font-size: 0.85em; }
.aud p { color: var(--ink-dim); font-size: var(--fs-sm); }

/* dual-track band */
.band {
  border: 1px solid var(--line-amber);
  border-radius: var(--radius);
  background: linear-gradient(120deg, var(--amber-dim), transparent 55%), var(--bg-panel);
  padding: clamp(28px, 4vw, 44px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.band h2 { font-size: var(--fs-lg); margin-bottom: 8px; }
.band p { color: var(--ink-dim); font-size: var(--fs-sm); max-width: 46em; }

/* ---------- integrations page ---------- */
.page-head { padding: clamp(56px, 9vh, 96px) 0 clamp(32px, 5vh, 48px); }
.page-head h1 { font-size: var(--fs-xl); margin: 16px 0 14px; }

.integ-featured {
  border: 1px solid var(--line-amber);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--amber-dim), transparent 60%), var(--bg-panel);
  padding: clamp(28px, 4vw, 40px);
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 32px;
  align-items: center;
}
.integ-featured .tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
  border: 1px solid var(--line-amber);
  border-radius: 99px;
  padding: 4px 12px;
  margin-bottom: 16px;
}
.integ-featured h2 { font-size: var(--fs-xl); margin-bottom: 12px; }
.integ-featured p { color: var(--ink-dim); margin-bottom: 20px; }
.integ-points { list-style: none; display: grid; gap: 10px; font-size: var(--fs-sm); color: var(--ink-dim); }
.integ-points li { display: flex; gap: 10px; }
.integ-points li::before { content: "✓"; color: var(--jade); font-weight: 700; flex: none; }

.integ-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.integ {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-inset);
  padding: 26px;
}
.integ .integ-kind {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.integ h3 { font-size: var(--fs-md); margin: 10px 0 8px; }
.integ p { color: var(--ink-dim); font-size: var(--fs-sm); }

/* ---------- get started ---------- */
.start-panel {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  padding: clamp(28px, 4vw, 44px);
  max-width: 720px;
}
.start-panel h2 { font-size: var(--fs-lg); margin-bottom: 10px; }
.start-panel > p { color: var(--ink-dim); margin-bottom: 24px; }
.start-steps { list-style: none; display: grid; gap: 0; counter-reset: s; margin-bottom: 28px; }
.start-steps li {
  counter-increment: s;
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-sm);
  color: var(--ink-dim);
}
.start-steps li:last-child { border-bottom: 0; }
.start-steps li::before {
  content: counter(s);
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--amber);
  border: 1px solid var(--line-amber);
  border-radius: 6px;
  width: 26px; height: 26px;
  display: grid;
  place-items: center;
  flex: none;
  margin-top: 1px;
}
.start-steps strong { color: var(--ink); font-weight: 600; }
.note {
  border-left: 2px solid var(--amber);
  background: var(--amber-dim);
  border-radius: 0 8px 8px 0;
  padding: 14px 18px;
  font-size: var(--fs-sm);
  color: var(--ink-dim);
}
.note strong { color: var(--ink); }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 48px 0 40px; margin-top: clamp(48px, 8vh, 96px); }
.footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 32px; }
.footer .brand { margin-bottom: 12px; }
.footer-tag { color: var(--ink-faint); font-size: var(--fs-xs); max-width: 30em; }
.footer-cols { display: flex; gap: clamp(32px, 6vw, 80px); }
.footer-col h4 {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 14px;
  font-weight: 500;
}
.footer-col a { display: block; color: var(--ink-dim); font-size: var(--fs-sm); padding: 4px 0; }
.footer-col a:hover { color: var(--ink); }
.footer-base {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: var(--fs-xs);
  color: var(--ink-faint);
  font-family: var(--mono);
}

/* ---------- capability visuals (animated, hand-rolled) ---------- */
.cap-viz {
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--bg-inset);
  margin: 16px 0 18px;
  overflow: hidden;
}
.cap-viz svg { width: 100%; height: auto; display: block; }
.viz-label { font-family: var(--mono); font-size: 7px; letter-spacing: 0.1em; fill: var(--ink-faint); }
.viz-box { fill: var(--bg-raise); stroke: var(--line-strong); }
.viz-amber { stroke: var(--amber); }
.viz-flow {
  fill: none;
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-dasharray: 4 6;
  animation: routeflow 1.5s linear infinite;
}
/* pulsing nodes (compute chips, people) — staggered via --d */
.viz-pulse { animation: vizpulse 2.6s ease-in-out infinite; animation-delay: var(--d, 0s); transform-box: fill-box; transform-origin: center; }
@keyframes vizpulse { 0%, 100% { opacity: 0.45; } 50% { opacity: 1; } }
/* traveling work packet along an SVG path */
.viz-packet {
  fill: var(--amber-hi);
  offset-rotate: 0deg;
  animation: vizpacket 3.2s cubic-bezier(0.45, 0, 0.35, 1) infinite;
  animation-delay: var(--d, 0s);
}
@keyframes vizpacket {
  0%   { offset-distance: 0%;   opacity: 0; }
  8%   { opacity: 1; }
  78%  { offset-distance: 100%; opacity: 1; }
  88%, 100% { offset-distance: 100%; opacity: 0; }
}
/* ledger rows accumulating (governance / 沉淀) */
.viz-row { opacity: 0; animation: vizrow 7s ease-out infinite; animation-delay: var(--d, 0s); }
@keyframes vizrow {
  0%, 4%  { opacity: 0; transform: translateY(5px); }
  10%, 92% { opacity: 1; transform: translateY(0); }
  97%, 100% { opacity: 0; }
}
/* wall bricks laying themselves (AI fence) */
.viz-brick { opacity: 0; animation: vizbrick 8s ease-out infinite; animation-delay: var(--d, 0s); }
@keyframes vizbrick {
  0%, 3%  { opacity: 0; transform: translateY(-4px); }
  8%, 94% { opacity: 1; transform: translateY(0); }
  99%, 100% { opacity: 0; }
}
/* assets glowing safely inside the wall */
.viz-asset { animation: vizasset 3s ease-in-out infinite; animation-delay: var(--d, 0s); transform-box: fill-box; transform-origin: center; }
@keyframes vizasset { 0%, 100% { opacity: 0.55; transform: scale(1); } 50% { opacity: 1; transform: scale(1.12); } }
/* an outside probe bouncing off the fence */
.viz-probe { animation: vizprobe 4s ease-in-out infinite; }
@keyframes vizprobe {
  0%, 12%  { transform: translateX(0); opacity: 0; }
  22%      { opacity: 0.9; }
  46%      { transform: translateX(26px); opacity: 0.9; }
  58%      { transform: translateX(14px); opacity: 0.55; }
  74%, 100% { transform: translateX(0); opacity: 0; }
}
/* hero: work dots traveling the routing board */
.route-dot {
  fill: var(--amber-hi);
  offset-rotate: 0deg;
  animation: routedot 4.8s linear infinite;
  animation-delay: var(--d, 0s);
}
.route-dot.blue { fill: var(--route-blue); }
@keyframes routedot {
  0%   { offset-distance: 0%;   opacity: 0; }
  6%   { opacity: 1; }
  44%  { offset-distance: 100%; opacity: 1; }
  50%, 100% { offset-distance: 100%; opacity: 0; }
}

/* ---------- code blocks + copy ---------- */
.codeblock {
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: var(--bg-inset);
  margin: 14px 0;
}
.codeblock pre {
  overflow-x: auto;
  padding: 14px 96px 14px 16px;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--ink);
  white-space: pre;
}
.codeblock .cb-lang {
  position: absolute;
  top: -9px; left: 14px;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  background: var(--bg);
  padding: 0 7px;
}
.copy-btn {
  position: absolute;
  top: 9px; right: 9px;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--ink-dim);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 5px 10px;
  background: var(--bg-raise);
  transition: color 0.15s, border-color 0.15s;
}
.copy-btn:hover { color: var(--amber-hi); border-color: var(--amber); }
.copy-btn.copied { color: var(--jade); border-color: var(--jade); }
@media (max-width: 720px) {
  .codeblock pre { padding: 42px 16px 14px; }
}

/* ---------- downloads page ---------- */
.dl-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.dl-card {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  padding: 26px;
  min-width: 0;
}
.dl-card h3 { font-size: var(--fs-md); margin-bottom: 6px; display: flex; align-items: center; gap: 10px; }
.dl-card h3 .os {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  border: 1px solid var(--line-amber);
  border-radius: 99px;
  padding: 2px 9px;
}
.dl-card > p { color: var(--ink-dim); font-size: var(--fs-sm); }
.dl-card .alt { font-size: var(--fs-xs); color: var(--ink-faint); margin-top: 10px; }
.dl-card .alt a, .note a, .file-table a { color: var(--amber-hi); }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  border: 1px solid var(--line-strong);
  border-radius: 99px;
  padding: 5px 14px;
}
.pill .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--jade); box-shadow: 0 0 8px var(--jade); }

.file-table-wrap { overflow-x: auto; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--bg-inset); }
.file-table { width: 100%; border-collapse: collapse; font-size: var(--fs-xs); min-width: 640px; }
.file-table th {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  text-align: left;
  font-weight: 500;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-strong);
}
.file-table td { padding: 11px 16px; border-bottom: 1px solid var(--line); color: var(--ink-dim); vertical-align: top; }
.file-table tr:last-child td { border-bottom: 0; }
.file-table .fname { font-family: var(--mono); font-size: 0.74rem; white-space: nowrap; }
.file-table .sha { font-family: var(--mono); font-size: 0.66rem; color: var(--ink-faint); word-break: break-all; min-width: 200px; }

/* ---------- join page ---------- */
.join-steps { display: grid; gap: 20px; max-width: 760px; }
.join-step {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  padding: 26px 26px 24px;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 18px;
}
.join-step .num {
  font-family: var(--mono);
  font-size: 1.05rem;
  color: var(--amber);
  border: 1px solid var(--line-amber);
  background: var(--amber-dim);
  border-radius: 9px;
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
}
.join-step h3 { font-size: var(--fs-lg); margin-bottom: 6px; }
.join-step p { color: var(--ink-dim); font-size: var(--fs-sm); }
.join-step .zh { margin-top: 6px; }
.join-step.done { border-color: rgba(67, 201, 138, 0.4); }
.join-step.done .num { color: var(--jade); border-color: rgba(67, 201, 138, 0.4); background: var(--jade-dim); }
.zh { display: block; color: var(--ink-faint); font-size: var(--fs-xs); line-height: 1.7; }
.invite-box {
  border: 1px solid var(--line-amber);
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--amber-dim), transparent 55%), var(--bg-panel);
  padding: clamp(24px, 4vw, 36px);
  max-width: 760px;
}
.invite-box h2 { font-size: var(--fs-lg); margin-bottom: 8px; }
.invite-box > p { color: var(--ink-dim); font-size: var(--fs-sm); margin-bottom: 6px; }
.invite-box .codeblock pre { white-space: pre-wrap; word-break: break-word; font-size: 0.82rem; }
@media (max-width: 600px) {
  .join-step { grid-template-columns: minmax(0, 1fr); }
  .join-step .num { width: 38px; height: 38px; }
}

/* ---------- guides page ---------- */
.guide-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.guide-toc a {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--ink-dim);
  border: 1px solid var(--line-strong);
  border-radius: 99px;
  padding: 6px 14px;
  transition: color 0.15s, border-color 0.15s;
}
.guide-toc a:hover { color: var(--amber-hi); border-color: var(--amber); }
.guide {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  padding: clamp(24px, 4vw, 36px);
  max-width: 820px;
  margin-bottom: 22px;
  scroll-margin-top: calc(var(--nav-h) + 16px);
}
.guide h2 { font-size: var(--fs-lg); margin-bottom: 4px; display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; }
.guide h2 .zh-title { font-size: 0.8em; font-weight: 500; color: var(--ink-faint); }
.guide > p { color: var(--ink-dim); font-size: var(--fs-sm); margin-top: 10px; }
.guide ol, .guide ul { margin: 12px 0 0 20px; color: var(--ink-dim); font-size: var(--fs-sm); display: grid; gap: 7px; }
.guide li::marker { color: var(--amber); font-family: var(--mono); font-size: 0.85em; }
.guide .zh-steps {
  margin-top: 14px;
  border-left: 2px solid var(--line-amber);
  background: var(--amber-dim);
  border-radius: 0 8px 8px 0;
  padding: 12px 16px;
}
.guide .zh-steps strong { color: var(--ink-dim); font-weight: 600; }
.guide code:not(pre code) {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--bg-inset);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 6px;
  white-space: nowrap;
}

/* quick-links band (homepage) */
.quick-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.quick {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-inset);
  padding: 24px;
  transition: border-color 0.2s, background 0.2s;
  display: block;
}
.quick:hover { border-color: var(--line-amber); background: var(--bg-panel); }
.quick .q-kicker {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
}
.quick h3 { font-size: var(--fs-md); margin: 10px 0 6px; }
.quick p { color: var(--ink-dim); font-size: var(--fs-sm); }
.quick .go { display: inline-block; margin-top: 12px; font-family: var(--mono); font-size: 0.72rem; color: var(--amber-hi); }
@media (max-width: 960px) {
  .dl-grid { grid-template-columns: minmax(0, 1fr); }
  .quick-grid { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .flow-steps { grid-template-columns: minmax(0, 1fr); }
  .step .step-arrow { display: none; }
  .aud-grid, .integ-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .integ-featured { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 720px) {
  .nav-links, .nav-cta .btn-ghost, .nav-cta .signin { display: none; }
  .menu-btn { display: block; }
  .cap-grid { grid-template-columns: minmax(0, 1fr); }
  .cap { border-right: 0 !important; border-bottom: 1px solid var(--line); }
  .cap:last-child { border-bottom: 0; }
  .aud-grid, .integ-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-cols { flex-direction: column; gap: 24px; }
}
@media (max-width: 430px) {
  .nav .brand .by { display: none; }
}

/* ============================================================
   2026-07 upgrade: language switch · hero pixel field ·
   product screenshots + lightbox · audience panels · download hero
   ============================================================ */

/* ---------- language switch (EN | 中文) ---------- */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  border: 1px solid var(--line-strong);
  border-radius: 99px;
  padding: 3px 6px;
  white-space: nowrap;
}
.lang-switch button {
  color: var(--ink-faint);
  padding: 2px 7px;
  border-radius: 99px;
  transition: color 0.15s, background 0.15s;
}
.lang-switch button:hover { color: var(--ink); }
.lang-switch button.active { color: var(--amber-hi); background: var(--amber-dim); }
.lang-switch .sep { color: var(--line-strong); }
.drawer .lang-switch { align-self: flex-start; margin-top: 12px; }
.footer-base .lang-switch { border-color: var(--line); }

/* ---------- hero: drifting pixel field (CSS only) ---------- */
.hero { position: relative; }
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(circle, rgba(232, 163, 61, 0.16) 1.5px, transparent 1.6px),
    radial-gradient(circle, rgba(93, 155, 212, 0.11) 1.5px, transparent 1.6px),
    radial-gradient(circle, rgba(233, 236, 239, 0.05) 1px, transparent 1.1px);
  background-size: 56px 56px, 92px 92px, 34px 34px;
  background-position: 0 0, 30px 46px, 12px 8px;
  animation: heropix 32s linear infinite;
  -webkit-mask-image: radial-gradient(ellipse 95% 90% at 62% 38%, #000 25%, transparent 78%);
  mask-image: radial-gradient(ellipse 95% 90% at 62% 38%, #000 25%, transparent 78%);
}
@keyframes heropix {
  to { background-position: 56px 56px, 122px 138px, 46px 42px; }
}
.hero > .container { position: relative; z-index: 1; }
@media (prefers-reduced-motion: reduce) {
  .hero::before { animation: none; }
}

/* ---------- "see it in action" screenshots ---------- */
.shot {
  display: block;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-inset);
  cursor: zoom-in;
  transition: border-color 0.2s, transform 0.2s;
}
.shot:hover { border-color: var(--amber); transform: translateY(-2px); }
.shot img { width: 100%; height: auto; display: block; }
.shot figcaption {
  padding: 12px 16px 13px;
  font-size: var(--fs-xs);
  color: var(--ink-dim);
  border-top: 1px solid var(--line);
  display: flex;
  gap: 12px;
  align-items: baseline;
}
.shot figcaption .cap-tag {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--amber);
  flex: none;
}
.shots-featured { margin-bottom: 20px; }
.shots-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.shots-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 20px; }
@media (max-width: 960px) {
  .shots-grid, .shots-grid.two { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- lightbox (no libs) ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(5, 6, 8, 0.93);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4vh 4vw;
}
.lightbox[hidden] { display: none; }
.lightbox img {
  max-width: 100%;
  max-height: 80vh;
  width: auto;
  height: auto;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.65);
}
.lightbox .lb-cap {
  margin-top: 16px;
  color: var(--ink-dim);
  font-size: var(--fs-sm);
  text-align: center;
  max-width: 62em;
}
.lightbox .lb-close {
  position: absolute;
  top: 16px;
  right: 20px;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 8px 14px;
  background: var(--bg-raise);
  transition: color 0.15s, border-color 0.15s;
}
.lightbox .lb-close:hover { color: var(--amber-hi); border-color: var(--amber); }

/* ---------- audience pitch panels ---------- */
.pitch-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.pitch {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  padding: clamp(26px, 3.5vw, 40px);
  display: flex;
  flex-direction: column;
}
.pitch.amberline {
  border-color: var(--line-amber);
  background: linear-gradient(150deg, var(--amber-dim), transparent 55%), var(--bg-panel);
}
.pitch .p-kicker {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
}
.pitch h3 { font-size: var(--fs-lg); margin: 12px 0 12px; }
.pitch ul { list-style: none; display: grid; gap: 9px; margin: 0 0 24px; font-size: var(--fs-sm); color: var(--ink-dim); }
.pitch li { display: flex; gap: 10px; }
.pitch li::before { content: "▸"; color: var(--amber); flex: none; font-size: 0.85em; line-height: 1.9; }
.pitch .btn { margin-top: auto; align-self: flex-start; }
@media (max-width: 960px) { .pitch-grid { grid-template-columns: minmax(0, 1fr); } }

/* ---------- downloads hero cards ---------- */
.dlh-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.dlh {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  padding: 28px;
  display: flex;
  flex-direction: column;
  min-width: 0;
  transition: border-color 0.2s;
}
.dlh:hover { border-color: var(--line-amber); }
.dlh .dlh-icon {
  width: 46px; height: 46px;
  border: 1px solid var(--line-amber);
  border-radius: 10px;
  background: var(--amber-dim);
  display: grid;
  place-items: center;
  margin-bottom: 16px;
}
.dlh .dlh-icon svg { width: 24px; height: 24px; stroke: var(--amber); fill: none; stroke-width: 1.7; }
.dlh h3 { font-size: var(--fs-md); }
.dlh .fname { font-family: var(--mono); font-size: 0.72rem; color: var(--amber-hi); word-break: break-all; margin: 6px 0 10px; }
.dlh p { color: var(--ink-dim); font-size: var(--fs-sm); margin-bottom: 20px; }
.dlh .btn { margin-top: auto; justify-content: center; }
.dlh .sha-link {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-faint);
  text-align: center;
}
.dlh .sha-link a { color: var(--amber-hi); }
@media (max-width: 960px) { .dlh-grid { grid-template-columns: minmax(0, 1fr); } }

/* when the whole page is Chinese, the inline Chinese helper blocks are
   redundant — the main copy already is Chinese. They stay for EN readers. */
html[lang^="zh"] .zh,
html[lang^="zh"] .zh-steps,
html[lang^="zh"] .zh-title { display: none; }