:root {
  --bg: #0b0e13;
  --bg-soft: #11161e;
  --panel: #151b24;
  --panel-2: #1b222d;
  --line: #2a3441;
  --text: #f3f6fa;
  --muted: #9ca9b8;
  --blue: #5d95ff;
  --cyan: #48d4cb;
  --green: #63d995;
  --amber: #f4c66e;
  --red: #ed6d7c;
  --violet: #b698ff;
  --shadow: 0 24px 70px rgba(0, 0, 0, .28);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.65 Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
}
a { color: inherit; text-decoration: none; }
img, video { display: block; max-width: 100%; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 70px;
  padding: 0 5vw;
  border-bottom: 1px solid rgba(42, 52, 65, .8);
  background: rgba(11, 14, 19, .84);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 12px; letter-spacing: .12em; font-weight: 700; white-space: nowrap; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid rgba(93, 149, 255, .8);
  border-radius: 8px;
  color: var(--blue);
  font-size: 11px;
  letter-spacing: 0;
}
.nav { display: flex; align-items: center; gap: 22px; margin-left: auto; color: var(--muted); font-size: 13px; }
.nav a:hover, .top-link:hover { color: var(--text); }
.top-link { color: var(--blue); font-size: 13px; white-space: nowrap; }

main { overflow: hidden; }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(330px, .8fr);
  gap: clamp(40px, 7vw, 110px);
  align-items: center;
  max-width: 1320px;
  min-height: 720px;
  margin: 0 auto;
  padding: 86px 5vw 100px;
}
.eyebrow { margin: 0 0 16px; color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .18em; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 760px; margin-bottom: 24px; font-size: clamp(42px, 5.6vw, 78px); line-height: 1.04; letter-spacing: -.04em; }
h2 { margin-bottom: 18px; font-size: clamp(30px, 4vw, 52px); line-height: 1.1; letter-spacing: -.035em; }
h3 { margin-bottom: 12px; font-size: 24px; line-height: 1.15; letter-spacing: -.02em; }
.hero-lede { max-width: 650px; margin-bottom: 30px; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 52px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 17px;
  border: 1px solid var(--line);
  border-radius: 7px;
  font-size: 13px;
  font-weight: 700;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.button:hover { transform: translateY(-2px); border-color: var(--blue); }
.button-primary { border-color: var(--blue); background: var(--blue); color: #07101f; }
.button-quiet { background: var(--panel); color: var(--text); }
.hero-metrics { display: flex; flex-wrap: wrap; gap: 28px; }
.hero-metrics div { display: grid; gap: 3px; }
.hero-metrics strong { font-size: 18px; }
.hero-metrics span { color: var(--muted); font-size: 12px; }
.hero-tool-panel { position: relative; justify-self: end; width: min(100%, 480px); padding: 26px; border: 1px solid rgba(72, 212, 203, .5); border-radius: 10px; background: linear-gradient(145deg, rgba(21, 35, 43, .95), rgba(21, 27, 36, .96)); box-shadow: var(--shadow); }
.hero-tool-panel::before { content: ""; position: absolute; inset: 12px -12px -12px 12px; z-index: -1; border: 1px solid rgba(93, 149, 255, .28); border-radius: 10px; }
.panel-caption { display: flex; align-items: center; gap: 8px; color: var(--green); font-size: 10px; font-weight: 800; letter-spacing: .14em; }
.scope-list { display: grid; gap: 0; margin-top: 24px; }
.scope-list div { display: grid; grid-template-columns: 72px 1fr; gap: 16px; padding: 15px 0; border-top: 1px solid var(--line); }
.scope-list b { color: var(--cyan); font-size: 13px; }
.scope-list span, .panel-note { color: var(--muted); font-size: 13px; }
.panel-note { margin: 22px 0 0; padding-top: 18px; border-top: 1px solid var(--line); }
.live-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 12px var(--green); }

.section { max-width: 1320px; margin: 0 auto; padding: 110px 5vw; }
.section-dark { max-width: none; background: var(--bg-soft); border-block: 1px solid rgba(42, 52, 65, .65); }
.section-dark > * { max-width: 1220px; margin-inline: auto; }
.section-heading { max-width: 750px; margin-bottom: 48px; }
.section-heading > p:last-child { color: var(--muted); font-size: 16px; }
.toolchain-section { padding-top: 90px; padding-bottom: 100px; }
.tool-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; }
.tool-item { min-height: 205px; padding: 20px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
.tool-index { color: var(--cyan); font: 700 11px/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.tool-item h3 { margin: 18px 0 10px; font-size: 17px; line-height: 1.2; }
.tool-item p { margin-bottom: 14px; color: var(--muted); font-size: 12px; line-height: 1.6; }
.tool-item small { color: var(--blue); font-size: 11px; font-weight: 700; }
.split-heading { display: grid; grid-template-columns: 1fr minmax(280px, .7fr); gap: 80px; max-width: 1040px; align-items: end; }
.split-heading > p { margin: 0; color: var(--muted); }

.architecture-grid { display: grid; grid-template-columns: minmax(0, 1fr) 180px minmax(0, 1fr); gap: 24px; align-items: stretch; }
.arch-node { padding: 28px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); }
.board-node { border-color: rgba(72, 212, 203, .6); }
.pc-node { border-color: rgba(93, 149, 255, .6); }
.node-kicker, .module-type { color: var(--muted); font-size: 10px; font-weight: 800; letter-spacing: .14em; }
.arch-node h3 { margin-top: 14px; }
.arch-node p { color: var(--muted); }
.arch-node ul { display: grid; gap: 6px; margin: 22px 0 0; padding-left: 18px; color: #c7d1dc; }
.flow-column { display: grid; align-content: center; gap: 16px; }
.flow-line { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center; padding: 12px 8px; border-block: 1px solid var(--line); color: var(--muted); font-size: 11px; }
.flow-line i { color: var(--blue); font-size: 18px; font-style: normal; }
.protocol-strip { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 32px; padding: 16px 18px; border: 1px solid var(--line); border-radius: 8px; background: rgba(21, 27, 36, .75); color: var(--muted); font-size: 12px; }
.protocol-strip b { color: var(--text); font-weight: 600; }
.protocol-strip i { color: var(--cyan); font-style: normal; }

.module-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.module-card { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(220px, .72fr); gap: 26px; padding: 28px; border: 1px solid var(--line); border-top: 2px solid var(--accent); border-radius: 9px; background: var(--panel); }
.module-card::after { content: ""; position: absolute; top: 0; right: 0; width: 90px; height: 90px; pointer-events: none; background: radial-gradient(circle at top right, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%); }
.module-number { margin-bottom: 18px; color: var(--accent); font: 700 12px/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.module-card h3 { margin-top: 10px; }
.module-card p { color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 20px; }
.chips span { padding: 3px 8px; border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--line)); border-radius: 4px; color: #d4dee9; font-size: 11px; }
.implementation { display: grid; grid-template-columns: auto 1fr; gap: 12px; margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.implementation b { color: var(--accent); font-size: 12px; white-space: nowrap; }
.module-media { align-self: start; min-width: 0; }
.module-media img, .module-media video { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border: 1px solid var(--line); border-radius: 6px; background: #05070a; }
.module-media video { aspect-ratio: 16 / 10; object-fit: contain; }
.module-media small { display: block; margin-top: 9px; color: var(--muted); font-size: 11px; line-height: 1.45; }
.media-stack { display: grid; gap: 14px; }
.media-stack figure { margin: 0; }
.media-stack figure img { aspect-ratio: 4 / 3; }
.media-stack figcaption { margin-top: 7px; color: var(--muted); font-size: 11px; line-height: 1.4; }
.accent-cyan { --accent: var(--cyan); }
.accent-blue { --accent: var(--blue); }
.accent-amber { --accent: var(--amber); }
.accent-green { --accent: var(--green); }
.accent-red { --accent: var(--red); }
.accent-sky { --accent: #69b8ff; }
.accent-violet { --accent: var(--violet); }
.module-camera { grid-row: span 2; }
.submodule { padding: 16px 0; border-top: 1px solid var(--line); }
.submodule:first-of-type { margin-top: 22px; }
.submodule strong { color: var(--blue); font-size: 14px; }
.submodule p { margin: 8px 0 0; }

.footer { display: flex; justify-content: space-between; gap: 16px; max-width: 1320px; margin: 0 auto; padding: 32px 5vw 46px; color: #708092; font-size: 11px; }

.lightbox { position: fixed; inset: 0; z-index: 30; display: none; place-items: center; padding: 5vh 5vw; background: rgba(0, 0, 0, .86); }
.lightbox.open { display: grid; }
.lightbox img { max-width: min(1100px, 92vw); max-height: 88vh; object-fit: contain; border: 1px solid var(--line); border-radius: 6px; }
.lightbox-close { position: fixed; top: 22px; right: 24px; width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); color: var(--text); font-size: 25px; cursor: pointer; }

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-tool-panel { justify-self: start; }
  .architecture-grid { grid-template-columns: 1fr; }
  .flow-column { grid-template-columns: repeat(3, 1fr); }
  .flow-line { grid-template-columns: 1fr; text-align: center; }
  .flow-line i { display: block; transform: rotate(90deg); }
  .split-heading { grid-template-columns: 1fr; gap: 18px; }
  .tool-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .module-card { grid-template-columns: 1fr; }
  .module-media { max-width: 620px; }
}
@media (max-width: 700px) {
  .topbar { gap: 14px; padding: 0 18px; }
  .nav { display: none; }
  .top-link { margin-left: auto; }
  .hero, .section { padding-right: 18px; padding-left: 18px; }
  h1 { font-size: 43px; }
  .hero-lede { font-size: 15px; }
  .hero-metrics { gap: 16px; }
  .module-grid, .tool-grid { grid-template-columns: 1fr; }
  .module-camera { grid-row: auto; }
  .module-card { padding: 22px; }
  .module-media { max-width: none; }
  .protocol-strip { align-items: flex-start; flex-direction: column; }
  .protocol-strip i { transform: rotate(90deg); }
  .footer { flex-direction: column; padding-inline: 18px; }
}