:root {
  color-scheme: light;
  --page: #f0f2f5;
  --band: #e9ebef;
  --surface: #fbfbfc;
  --surface-2: #f1f2f5;
  --ink: #16181d;
  --ink-2: #4b5160;
  --muted: #858b98;
  --line: #dde0e6;
  --grid: #e4e6eb;
  --border: rgba(22, 24, 29, 0.1);
  --accent: #1f7fc4;
  --accent-2: #0ea5e9;
  --accent-soft: rgba(31, 127, 196, 0.12);
  --ok: #0ca30c;
  --btn-dark: #16181d;
  --btn-dark-ink: #ffffff;
  --code-k: #2563b8;
  --code-s: #16803c;
  --code-n: #c2410c;
  --s1: #2a78d6; --s2: #eb6834; --s3: #1baf7a; --s4: #eda100;
  --s5: #e87ba4; --s6: #008300; --s7: #4a3aa7; --s8: #e34948;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "PingFang SC", "Microsoft YaHei", monospace;
  --col: 1120px;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0e1014;
    --band: #13161b;
    --surface: #181b21;
    --surface-2: #1f232a;
    --ink: #f2f4f7;
    --ink-2: #b4bac6;
    --muted: #7d8391;
    --line: #232730;
    --grid: #262a33;
    --border: rgba(255, 255, 255, 0.1);
    --accent: #3b9be0;
    --accent-2: #38bdf8;
    --accent-soft: rgba(59, 155, 224, 0.16);
    --btn-dark: #f2f4f7;
    --btn-dark-ink: #0e1014;
    --code-k: #7cb3f5;
    --code-s: #6fd08c;
    --code-n: #f59e6b;
    --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500;
    --s5: #d55181; --s6: #008300; --s7: #9085e9; --s8: #e66767;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
html, body { margin: 0; }
body {
  background: var(--page);
  color: var(--ink);
  font: 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
[hidden] { display: none !important; }
a { color: inherit; }
h1, h2, h3, p { margin: 0; }
.mono { font-family: var(--mono); }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.accent { color: var(--accent); }
.center { text-align: center; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }

/* ---------- frame: full-width bands, guide-lined column ---------- */
.band { border-bottom: 1px solid var(--line); }
.wrap {
  position: relative;
  max-width: var(--col);
  margin: 0 auto;
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
}
.band.alt .wrap { background: var(--band); }
.inner { max-width: 960px; margin: 0 auto; padding: 112px 24px; position: relative; }

/* ---------- nav ---------- */
.nav { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--page) 86%, transparent); backdrop-filter: blur(10px); }
.nav .wrap { background: transparent; }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 64px; padding: 0 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 600; font-size: 17px; }
.brand-mark { width: 26px; height: 26px; }
.nav-links { display: flex; gap: 20px; margin-left: 12px; font-size: 14px; }
.nav-links a { color: var(--ink-2); text-decoration: none; }
.nav-links a:hover { color: var(--ink); }
.nav-auth { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.avatar { width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--border); background: var(--surface-2); }
.who { font-size: 14px; color: var(--ink-2); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  text-decoration: none; border-radius: 10px; border: 1px solid var(--border);
  font: 500 14px/1 var(--font); padding: 10px 16px; cursor: pointer; white-space: nowrap;
  transition: transform .12s ease, background .12s ease, box-shadow .12s ease;
}
.btn .ico { width: 16px; height: 16px; flex: none; }
.btn-sm { padding: 8px 12px; font-size: 13px; }
.btn-lg { padding: 13px 22px; font-size: 15px; border-radius: 12px; }
.btn-dark { background: var(--btn-dark); color: var(--btn-dark-ink); border-color: transparent; }
.btn-dark:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0, 0, 0, .14); }
.btn-ghost { background: var(--surface); color: var(--ink); border-radius: 999px; padding: 12px 22px; font-family: var(--mono); font-size: 13px; letter-spacing: .02em; }
.btn-ghost:hover { background: var(--surface-2); }
.ico { width: 16px; height: 16px; }
.ico.accent { color: var(--accent); }

/* ---------- tags & shared text ---------- */
.tag { font: 500 12px/1 var(--mono); letter-spacing: .14em; color: var(--accent); margin-bottom: 18px; }
h2 { font-size: clamp(28px, 4.2vw, 44px); line-height: 1.15; letter-spacing: -0.02em; font-weight: 700; }
.body { margin-top: 20px; max-width: 600px; color: var(--ink-2); font-size: 15.5px; line-height: 1.75; }
.ruled { display: flex; align-items: center; justify-content: center; gap: 14px; color: var(--muted); font-size: 12.5px; letter-spacing: .04em; }
.ruled::before, .ruled::after { content: ""; width: 36px; height: 1px; background: var(--accent); opacity: .5; flex: none; }

/* ---------- hero ---------- */
.hero .wrap { overflow: hidden; }
.hero .inner { padding: 150px 24px 130px; }
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 72px 72px;
  background-position: center center;
  -webkit-mask-image: radial-gradient(ellipse 60% 55% at 50% 45%, #000 20%, transparent 75%);
  mask-image: radial-gradient(ellipse 60% 55% at 50% 45%, #000 20%, transparent 75%);
  opacity: .8;
}
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--border); background: var(--surface); border-radius: 999px;
  padding: 6px 14px; font: 500 12px/1 var(--mono); letter-spacing: .16em; color: var(--ink-2);
}
.pill .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 0 3px var(--accent-soft); }
.wordmark {
  margin-top: 26px;
  font: 800 clamp(64px, 13vw, 132px)/1 var(--mono);
  letter-spacing: -0.02em;
  word-spacing: -0.3em;
  color: var(--ink);
}
.wordmark .grad {
  background: linear-gradient(135deg, var(--accent) 10%, var(--accent-2) 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { margin: 26px auto 0; max-width: 520px; color: var(--ink-2); font-size: 16px; line-height: 1.7; }
.hero-cta { margin: 34px 0 34px; display: flex; justify-content: center; }
.notice {
  display: block; width: fit-content; max-width: 100%; margin: 0 auto 26px; padding: 8px 14px; border-radius: 10px;
  background: var(--accent-soft); color: var(--ink); font-size: 14px; border: 1px solid var(--border);
}
.notice.warn { background: rgba(227, 73, 72, .1); }

/* ---------- counter ---------- */
.counter .inner { padding: 110px 24px 120px; }
.big-number {
  font-size: clamp(30px, 8.6vw, 104px); font-weight: 700; letter-spacing: -0.01em; line-height: 1.05;
  font-variant-numeric: tabular-nums; margin: 6px 0 22px; white-space: nowrap;
}
.caption { color: var(--ink-2); font-size: 14px; letter-spacing: 0; font-family: var(--font); }
.caption .sep { color: var(--muted); }
.boxed {
  display: inline-block; margin-top: 26px; padding: 6px 14px;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent); background: var(--accent-soft);
  font-size: 12.5px; letter-spacing: .08em; color: var(--muted);
}
.boxed b { color: var(--ink); font-weight: 700; letter-spacing: .02em; }
.boxed .up { color: var(--accent); }

/* ---------- telemetry mock ---------- */
.mock {
  margin: 44px 0 34px; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; overflow: hidden;
}
.mock-kpis {
  display: flex; align-items: center; gap: 0; padding: 18px 22px; background: var(--surface-2); border-bottom: 1px solid var(--border);
  position: relative; flex-wrap: wrap; row-gap: 10px;
}
.mock-kpis div { display: grid; gap: 2px; padding-right: 28px; margin-right: 28px; border-right: 1px solid var(--border); }
.mock-kpis div:nth-of-type(3) { border-right: 0; }
.mock-kpis b { font-size: 26px; color: var(--accent); font-weight: 700; }
.mock-kpis span { font: 500 11px/1 var(--mono); letter-spacing: .14em; color: var(--muted); }
.sample { margin-left: auto; font-size: 11px; letter-spacing: .1em; color: var(--muted); border: 1px dashed var(--line); border-radius: 6px; padding: 4px 8px; }
.mock-body { display: grid; grid-template-columns: 1.55fr 1fr; }
.mock-chart { padding: 20px 20px 14px; position: relative; border-right: 1px solid var(--border); min-width: 0; }
.mock-tracks { padding: 20px 22px; min-width: 0; }
.mock-label { font-size: 11px; letter-spacing: .14em; color: var(--muted); margin-bottom: 10px; }
.chart-host svg { display: block; width: 100%; height: auto; }
.chart-host .grid { stroke: var(--grid); stroke-width: 1; }
.chart-host .axis { fill: var(--muted); font: 10px var(--mono); }
.chart-host .hit { fill: transparent; cursor: default; }
.chart-host .hit:hover, .chart-host .hit.on { fill: var(--accent-soft); }
.chart-host .s1 { fill: var(--s1); } .chart-host .s2 { fill: var(--s2); } .chart-host .s3 { fill: var(--s3); }
.chart-host .s4 { fill: var(--s4); } .chart-host .s5 { fill: var(--s5); } .chart-host .s6 { fill: var(--s6); }
.chart-tip {
  position: absolute; z-index: 3; pointer-events: none; min-width: 170px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .14); font-size: 12px; color: var(--ink);
}
.chart-tip .th { font-weight: 600; margin-bottom: 4px; }
.chart-tip .row { display: flex; align-items: center; gap: 6px; justify-content: space-between; }
.chart-tip .row span:first-child { display: inline-flex; align-items: center; gap: 6px; color: var(--ink-2); }
.chart-tip .tot { border-top: 1px solid var(--grid); margin-top: 4px; padding-top: 4px; }
.sw { display: inline-block; width: 9px; height: 9px; border-radius: 3px; flex: none; }
#mock-tracks { list-style: none; margin: 0; padding: 0; display: grid; gap: 13px; }
#mock-tracks li { display: grid; grid-template-columns: 22px 92px 1fr 56px; align-items: center; gap: 10px; font-size: 13.5px; }
#mock-tracks .mi { width: 22px; height: 22px; border-radius: 6px; display: grid; place-items: center; font: 700 9px/1 var(--mono); color: var(--fg, #fff); background: var(--c); }
#mock-tracks .bar { height: 6px; border-radius: 3px; background: var(--surface-2); overflow: hidden; }
#mock-tracks .bar i { display: block; height: 100%; border-radius: 3px; background: var(--c); }
#mock-tracks .v { text-align: right; font: 500 12.5px var(--mono); color: var(--ink-2); font-variant-numeric: tabular-nums; }

/* ---------- bracket card ---------- */
.bracket-card {
  position: relative; display: grid; grid-template-columns: 1.15fr 1fr;
  border: 1px dashed var(--line); background: linear-gradient(180deg, var(--surface-2), var(--surface));
}
.bracket-card .c { position: absolute; width: 14px; height: 14px; border-color: var(--accent); border-style: solid; border-width: 0; }
.bracket-card .tl { top: -1px; left: -1px; border-top-width: 2px; border-left-width: 2px; }
.bracket-card .tr { top: -1px; right: -1px; border-top-width: 2px; border-right-width: 2px; }
.bracket-card .bl { bottom: -1px; left: -1px; border-bottom-width: 2px; border-left-width: 2px; }
.bracket-card .br { bottom: -1px; right: -1px; border-bottom-width: 2px; border-right-width: 2px; }
.bc-text { padding: 52px 44px; min-width: 0; }
.bc-text h2, .split h2 { font-size: clamp(26px, 3.2vw, 36px); }
.bc-visual {
  border-left: 1px dashed var(--line); padding: 32px 26px; display: grid; align-items: center; min-width: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px;
}
.stat-row { display: flex; gap: 34px; flex-wrap: wrap; margin-top: 30px; padding-top: 24px; border-top: 1px dashed var(--line); }
.stat-row div { display: grid; gap: 6px; }
.stat-row b { font-size: 24px; color: var(--accent); font-weight: 700; }
.stat-row span { font-size: 11px; letter-spacing: .1em; color: var(--muted); }
.terminal { background: #0f1218; border-radius: 10px; border: 1px solid rgba(255, 255, 255, .08); box-shadow: 0 16px 40px rgba(0, 0, 0, .18); overflow: hidden; }
.term-bar { display: flex; align-items: center; gap: 6px; padding: 9px 12px; border-bottom: 1px solid rgba(255, 255, 255, .07); }
.term-bar i { width: 9px; height: 9px; border-radius: 50%; background: #3a3f4a; }
.term-bar span { margin-left: 8px; font-size: 11px; color: #7d8391; }
.terminal pre { margin: 0; padding: 14px 14px 16px; font-size: 11.5px; line-height: 1.65; color: #d8dde6; overflow-x: auto; }
.terminal b { color: #fff; font-weight: 700; }
.t-dim { color: #7d8391; }

/* ---------- open data ---------- */
.split { display: grid; grid-template-columns: 1fr 1.05fr; gap: 56px; align-items: center; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.chip { border: 1px solid var(--border); background: var(--surface); border-radius: 999px; padding: 6px 12px; font-size: 12px; color: var(--ink-2); }
.chip b { color: var(--accent); font-weight: 700; margin-right: 4px; }
.code-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; min-width: 0; }
.code-head { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--surface-2); }
.method { background: var(--accent); color: #fff; font-size: 11px; font-weight: 700; padding: 4px 8px; border-radius: 5px; letter-spacing: .06em; }
.path { font-size: 13px; color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ok { margin-left: auto; font-size: 11px; color: var(--muted); display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.ok i { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); }
.code { margin: 0; padding: 18px 20px; font-size: 12.5px; line-height: 1.75; color: var(--muted); overflow-x: auto; }
.code .k { color: var(--code-k); } .code .s { color: var(--code-s); } .code .n { color: var(--code-n); }

/* ---------- agents ---------- */
.tiles { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: repeat(7, 1fr); border: 1px solid var(--line); background: var(--surface); }
.tiles li { display: grid; justify-items: center; gap: 12px; padding: 26px 8px 22px; font-size: 13px; color: var(--ink-2); border-right: 1px solid var(--line); text-align: center; }
.tiles li:last-child { border-right: 0; }
.mono-ico { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; font: 700 13px/1 var(--mono); color: var(--fg, #fff); background: var(--c); }
.mono-ico.plus { background: var(--surface-2); color: var(--ink-2); font-size: 20px; border: 1px dashed var(--line); }

/* ---------- steps ---------- */
.steps { list-style: none; padding: 0; margin: 40px 0 0; display: grid; gap: 16px; }
.steps li { display: grid; grid-template-columns: 64px 1fr; gap: 20px; align-items: start; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 22px 24px; }
.step-no { font-size: 26px; font-weight: 700; color: var(--accent); line-height: 1; padding-top: 4px; }
.step-body { min-width: 0; }
.step-body h3 { font-size: 17px; font-weight: 600; }
.step-body p { color: var(--ink-2); font-size: 14.5px; margin-top: 4px; }
.cmd { display: flex; align-items: center; gap: 10px; margin-top: 12px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 9px; padding: 8px 8px 8px 14px; }
.cmd code { flex: 1; min-width: 0; font-size: 13px; overflow-x: auto; white-space: nowrap; scrollbar-width: thin; padding: 4px 0; }
.copy { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--border); background: var(--surface); color: var(--ink-2); border-radius: 7px; padding: 5px 10px; font: 500 12px/1 var(--font); cursor: pointer; flex: none; }
.copy:hover { color: var(--ink); }
.copy .ico { width: 14px; height: 14px; }
.copy.done { color: var(--ok); }

/* ---------- final CTA ---------- */
.cta .inner { padding: 120px 24px; }
.cta-1 { font-size: clamp(22px, 3.2vw, 32px); color: var(--ink-2); font-weight: 500; }
.cta-2 { font-size: clamp(30px, 4.6vw, 44px); color: var(--accent); font-weight: 700; margin: 6px 0 36px; letter-spacing: -0.01em; }

/* ---------- footer ---------- */
.foot { border-bottom: 0; }
.foot .inner { padding: 28px 24px 34px; display: grid; gap: 10px; }
.foot-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; font-size: 13.5px; color: var(--muted); }
.foot-links a { color: var(--ink-2); text-decoration: none; }
.foot-links a:hover { color: var(--ink); }

/* ---------- responsive ---------- */
@media (max-width: 1160px) {
  .wrap { border-left: 0; border-right: 0; }
}
@media (max-width: 900px) {
  .mock-body { grid-template-columns: 1fr; }
  .mock-chart { border-right: 0; border-bottom: 1px solid var(--border); }
  .bracket-card { grid-template-columns: 1fr; }
  .bc-visual { border-left: 0; border-top: 1px dashed var(--line); }
  .split { grid-template-columns: 1fr; gap: 36px; }
  .tiles { grid-template-columns: repeat(4, 1fr); }
  .tiles li { border-bottom: 1px solid var(--line); }
  .tiles li:nth-child(4n) { border-right: 0; }
}
@media (max-width: 640px) {
  body { font-size: 15px; }
  .inner { padding: 72px 16px; }
  .hero .inner { padding: 96px 16px 84px; }
  .counter .inner, .cta .inner { padding: 80px 16px; }
  .nav-inner { padding: 0 16px; gap: 12px; }
  .nav-links { display: none; }
  .who { display: none; }
  .br-wide { display: none; }
  .ruled { font-size: 11px; gap: 8px; }
  .ruled::before, .ruled::after { width: 16px; }
  .mock-kpis { padding: 14px 16px; }
  .mock-kpis div { padding-right: 16px; margin-right: 16px; }
  .mock-kpis b { font-size: 20px; }
  .sample { margin-left: 0; }
  .mock-chart, .mock-tracks { padding: 16px; }
  #mock-tracks li { grid-template-columns: 22px 84px 1fr 50px; gap: 8px; font-size: 13px; }
  .bc-text { padding: 36px 20px; }
  .bc-visual { padding: 20px 12px; }
  .stat-row { gap: 20px; }
  .stat-row b { font-size: 20px; }
  .tiles { grid-template-columns: repeat(2, 1fr); }
  .tiles li:nth-child(4n) { border-right: 1px solid var(--line); }
  .tiles li:nth-child(2n) { border-right: 0; }
  .steps li { grid-template-columns: 1fr; gap: 10px; padding: 18px 16px; }
  .code { font-size: 11.5px; padding: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
  .btn-dark:hover { transform: none; }
}