/* team-agent.net — architectural design system.
   Matte surfaces, hairline structure, one accent. No radii, no gradients, no shadows, no frameworks. */

:root {
  --bg: #050608;
  --bg-1: #0a0b0e;
  --bg-2: #101216;
  --line: rgba(255, 255, 255, 0.07);
  --line-2: rgba(255, 255, 255, 0.13);
  --line-3: rgba(255, 255, 255, 0.26);
  --ink: #ededea;
  --ink-2: #a2a5ab;
  --ink-3: #63676f;
  --accent: #ff5b1f;
  --on-accent: #050608;
  --ok: #3fd17f;
  --warn: #e8b339;
  --bad: #ff6b5b;
  --console: #07080a;
  --fw: min(1200px, calc(100vw - 40px));
  --gut: 24px;
  --display: "Inter Display", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --sans: "Inter", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", "PingFang SC", monospace;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  color-scheme: dark;
}
:root[data-theme="light"] {
  --bg: #f3f3ef;
  --bg-1: #eaeae5;
  --bg-2: #ffffff;
  --line: rgba(10, 10, 12, 0.08);
  --line-2: rgba(10, 10, 12, 0.15);
  --line-3: rgba(10, 10, 12, 0.34);
  --ink: #0b0b0c;
  --ink-2: #4a4d53;
  --ink-3: #80848b;
  --accent: #f24b0f;
  --ok: #12924f;
  --warn: #a66d00;
  --bad: #d63a2a;
  --console: #0b0c0e;
  color-scheme: light;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 16px/1.6 var(--sans); letter-spacing: -0.006em;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11"; overflow-x: hidden;
}
/* Page frame: two vertical hairlines aligned with the content grid, running the full height. */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    linear-gradient(var(--line), var(--line)) calc(50% - var(--fw) / 2) 0 / 1px 100% no-repeat,
    linear-gradient(var(--line), var(--line)) calc(50% + var(--fw) / 2) 0 / 1px 100% no-repeat;
}
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
code, kbd, pre, samp { font-family: var(--mono); font-size: 0.88em; }
::selection { background: var(--accent); color: var(--on-accent); }
:focus-visible { outline: 1px solid var(--accent); outline-offset: 3px; }
.wrap { width: var(--fw); margin: 0 auto; position: relative; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 100; background: var(--accent); color: var(--on-accent); padding: 8px 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.mono { font-family: var(--mono); }
.accent { color: var(--accent); }
.ok { color: var(--ok); }
.bad { color: var(--bad); }
.warn { color: var(--warn); }
h1, h2, h3, h4 { margin: 0; font-family: var(--display); font-weight: 600; letter-spacing: -0.035em; line-height: 1.05; }
h1, h2 { text-wrap: balance; }
p { text-wrap: pretty; }

/* Crosshair registration marks at each section's top corners. */
.section > .wrap::before, .section > .wrap::after, .hero > .wrap::after {
  content: ""; position: absolute; top: -6px; width: 11px; height: 11px; pointer-events: none;
  background: linear-gradient(var(--line-3), var(--line-3)) 50% 0 / 1px 100% no-repeat, linear-gradient(var(--line-3), var(--line-3)) 0 50% / 100% 1px no-repeat;
}
.section > .wrap::before { left: -6px; }
.section > .wrap::after, .hero > .wrap::after { right: -6px; }
.hero > .wrap::after { top: auto; bottom: -6px; }

/* Reveal: below-the-fold only (set by JS). */
.reveal { opacity: 0; transform: translate3d(0, 10px, 0); transition: opacity .6s var(--ease), transform .6s var(--ease); transition-delay: var(--rd, 0ms); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Mono annotation primitives ---------- */
.eyebrow, .label, .tag, .ix {
  font: 500 11px/1.3 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3);
}
.eyebrow { display: inline-flex; align-items: baseline; gap: 10px; color: var(--ink-2); }
.eyebrow b { font-weight: 500; color: var(--accent); }
.eyebrow b::before { content: "["; color: var(--ink-3); }
.eyebrow b::after { content: "]"; color: var(--ink-3); }
.dot { display: inline-block; width: 7px; height: 7px; background: var(--ok); flex: none; }
.dot.live { animation: blink 1.6s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0.2; } }

/* ---------- Header ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--bg); border-bottom: 1px solid var(--line-2); }
.nav { display: flex; align-items: stretch; height: 56px; }
.brand { display: flex; align-items: center; gap: 10px; padding-right: 22px; margin-right: 22px; border-right: 1px solid var(--line); font: 600 15px/1 var(--display); letter-spacing: -0.02em; }
.brand svg { width: 20px; height: 20px; }
.brand-tag { font: 500 10px/1 var(--mono); letter-spacing: 0.08em; color: var(--ink-3); border: 1px solid var(--line-2); padding: 3px 5px; }
.nav-links { display: flex; align-items: stretch; margin: 0; padding: 0; list-style: none; }
.nav-links a { display: flex; align-items: center; gap: 7px; height: 100%; padding: 0 14px; font-size: 13.5px; color: var(--ink-2); transition: color .15s; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }
.nav-links .ix { font-size: 10px; color: var(--ink-3); letter-spacing: 0.04em; }
.nav-end { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.icon-btn { display: inline-grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--line-2); background: transparent; color: var(--ink-2); cursor: pointer; border-radius: 0; transition: color .15s, border-color .15s; }
.icon-btn:hover { color: var(--ink); border-color: var(--line-3); }
.icon-btn svg { width: 15px; height: 15px; }
.theme-sun { display: none; }
:root[data-theme="light"] .theme-sun { display: block; }
:root[data-theme="light"] .theme-moon { display: none; }
.nav-toggle { display: none; }
.lang-switch { display: inline-flex; height: 34px; border: 1px solid var(--line-2); font: 500 11px/1 var(--mono); letter-spacing: 0.06em; }
.lang-switch a { display: grid; place-items: center; min-width: 44px; padding: 0 10px; color: var(--ink-3); transition: color .15s, background .15s; }
.lang-switch a + a { border-left: 1px solid var(--line-2); }
.lang-switch a:hover { color: var(--ink); }
.lang-switch a[aria-current="true"] { background: var(--ink); color: var(--bg); }

/* ---------- Ticker ribbon ---------- */
.ticker { border-bottom: 1px solid var(--line); overflow: hidden; height: 30px; background: var(--bg); }
.ticker-track { display: flex; width: max-content; animation: tick 60s linear infinite; }
.ticker span { display: inline-flex; align-items: center; height: 30px; padding: 0 22px; font: 500 10.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); border-right: 1px solid var(--line); white-space: nowrap; }
.ticker span b { font-weight: 500; color: var(--ink); margin-left: 8px; }
.ticker span b.a { color: var(--accent); }
@keyframes tick { to { transform: translate3d(-50%, 0, 0); } }

/* ---------- Buttons & commands ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px; height: 46px; padding: 0 22px;
  font: 500 14px/1 var(--sans); letter-spacing: -0.005em; color: var(--ink); background: transparent;
  border: 1px solid var(--line-3); border-radius: 0; transition: background .15s, color .15s, border-color .15s;
}
.btn:hover { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn-sm { height: 34px; padding: 0 12px; font-size: 12.5px; border-color: var(--line-2); }
.btn svg { width: 14px; height: 14px; }
.btn-primary { background: var(--accent); color: var(--on-accent); border-color: var(--accent); font-weight: 600; }
.btn-primary::after { content: "→"; font-family: var(--mono); }
.btn-primary:hover { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.cmd { display: flex; align-items: stretch; max-width: 100%; border: 1px solid var(--line-2); background: var(--bg-1); font: 13px/1 var(--mono); }
.cmd .prompt { display: grid; place-items: center; padding: 0 12px; color: var(--accent); border-right: 1px solid var(--line-2); user-select: none; }
.cmd code { flex: 1; min-width: 0; padding: 14px 14px; color: var(--ink); white-space: nowrap; overflow-x: auto; scrollbar-width: none; font-size: 13px; }
.cmd code::-webkit-scrollbar { display: none; }
.copy, .code-copy { flex: none; font: 500 10.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); background: transparent; border: 0; border-left: 1px solid var(--line-2); padding: 0 14px; cursor: pointer; border-radius: 0; transition: color .15s, background .15s; }
.copy:hover, .code-copy:hover { color: var(--ink); background: var(--bg-2); }
.copy.done, .code-copy.done { color: var(--on-accent); background: var(--ok); }
.step .cmd code, .cmd.wrap-text code { white-space: normal; overflow-wrap: anywhere; line-height: 1.5; padding: 11px 14px; }

/* ---------- Hero / masthead ---------- */
.hero { position: relative; border-bottom: 1px solid var(--line-2); }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: -1;
  background: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px calc(var(--fw) / 12)) calc(50% - var(--fw) / 2) 0 / var(--fw) 100% no-repeat;
  opacity: 0.55;
}
.ruler { height: 14px; border-bottom: 1px solid var(--line); background: repeating-linear-gradient(90deg, var(--line-2) 0 1px, transparent 1px 10px) 0 100% / 100% 5px no-repeat, repeating-linear-gradient(90deg, var(--line-3) 0 1px, transparent 1px 100px) 0 100% / 100% 14px no-repeat; }
.hero-meta { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); border-bottom: 1px solid var(--line); font: 500 10.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.hero-meta > * { display: flex; align-items: center; min-height: 40px; padding: 0 14px 0 0; }
.hero-meta .m-a { grid-column: 1 / 4; }
.hero-meta .m-b { grid-column: 4 / 10; border-left: 1px solid var(--line); padding-left: 14px; }
.hero-meta .m-c { grid-column: 10 / 13; border-left: 1px solid var(--line); padding-left: 14px; justify-content: space-between; }
.release-pill { display: inline-flex; align-items: center; gap: 12px; color: var(--ink-2); transition: color .15s; text-transform: none; letter-spacing: 0; font: 400 13px/1.3 var(--sans); }
.release-pill:hover { color: var(--ink); }
.release-pill b { font: 600 10px/1 var(--mono); letter-spacing: 0.1em; padding: 5px 7px; background: var(--accent); color: var(--on-accent); }
.hero-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); }
.hero-copy { grid-column: 1 / 8; padding: 72px 48px 64px 0; display: flex; flex-direction: column; }
.hero h1 { font-size: clamp(46px, 7vw, 108px); font-weight: 600; letter-spacing: -0.058em; line-height: 0.92; margin: 0 0 56px; }
.hero h1 .dim { color: var(--ink-3); }
.hero-sub { display: grid; grid-template-columns: minmax(0, 1fr); gap: 22px; max-width: 560px; margin-top: auto; }
.hero-lede { margin: 0; font-size: 18.5px; line-height: 1.55; color: var(--ink-2); }
.hero-lede::first-line { color: var(--ink); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-note { margin: 0; font: 500 10.5px/1.6 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); }

/* ---------- Console deck ---------- */
.term { grid-column: 8 / 13; margin: 0; align-self: stretch; display: flex; flex-direction: column; border-left: 1px solid var(--line-2); background: var(--console); color: #d9dbe0; font: 12.5px/1.7 var(--mono); }
.deck-head { display: flex; justify-content: space-between; align-items: center; height: 40px; padding: 0 16px; border-bottom: 1px solid rgba(255,255,255,0.09); font: 500 10.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: #6a6e76; }
.deck-head .rep { display: inline-flex; align-items: center; gap: 8px; color: #d9dbe0; }
.deck-head .rep i { width: 6px; height: 6px; background: var(--accent); animation: blink 1.2s steps(1) infinite; }
.deck-stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 0; border-bottom: 1px solid rgba(255,255,255,0.09); }
.deck-stats > div { padding: 12px 16px; border-right: 1px solid rgba(255,255,255,0.09); border-bottom: 1px solid rgba(255,255,255,0.09); }
.deck-stats > div:nth-child(2n) { border-right: 0; }
.deck-stats > div:nth-last-child(-n+2) { border-bottom: 0; }
.deck-stats dt { font: 500 9.5px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: #6a6e76; margin-bottom: 7px; }
.deck-stats dd { margin: 0; font: 500 13px/1 var(--mono); color: #f0f0ec; letter-spacing: 0.02em; }
.deck-stats dd b { color: var(--ok); font-weight: 500; }
.deck-stats dd em { font-style: normal; color: var(--accent); }
.term-tabs { display: flex; border-bottom: 1px solid rgba(255,255,255,0.09); overflow-x: auto; scrollbar-width: none; }
.term-tabs::-webkit-scrollbar { display: none; }
.term-tab { flex: 1 0 auto; display: inline-flex; align-items: center; gap: 8px; height: 38px; padding: 0 14px; font: 500 11px/1 var(--mono); color: #6a6e76; background: transparent; border: 0; border-right: 1px solid rgba(255,255,255,0.09); border-radius: 0; cursor: pointer; transition: color .15s, background .15s; }
.term-tab:last-child { border-right: 0; }
.term-tab:hover { color: #d9dbe0; }
.term-tab[aria-selected="true"] { color: #f0f0ec; background: #0e1013; box-shadow: inset 0 -2px 0 var(--accent); }
.term-tab .sd { width: 6px; height: 6px; background: var(--c); }
.term-tab .ix { color: #4f535a; font-size: 10px; }
.term-body { flex: 1; min-height: 360px; padding: 18px 16px; overflow: auto; scrollbar-width: thin; }
.term-body pre { margin: 0; white-space: pre; font: inherit; }
.term-body pre[hidden] { display: none; }
.term .tl { display: block; min-height: 1.7em; }
.term pre.anim .tl { opacity: 0; animation: tline .2s steps(2) forwards; animation-delay: var(--d); }
@keyframes tline { to { opacity: 1; } }
.t-p { color: var(--accent); user-select: none; }
.t-c { color: #5a5e66; }
.t-ok { color: #3fd17f; }
.t-bad { color: #ff6b5b; }
.t-warn { color: #e8b339; }
.t-k { color: #9aa0aa; }
.t-dim { color: #7d818a; }
.t-m { color: #f0f0ec; }
.caret { display: inline-block; width: 8px; height: 15px; background: var(--accent); vertical-align: -3px; animation: blink 1s steps(1) infinite; }
.term figcaption { padding: 11px 16px; border-top: 1px solid rgba(255,255,255,0.09); font: 500 10px/1.5 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: #5a5e66; }
.term-bar, .term-lights, .term-title { display: none; }

/* ---------- KPI spec strip ---------- */
.kpis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line-2); }
.kpi { position: relative; padding: 26px 22px 28px; border-left: 1px solid var(--line); counter-increment: kpi; }
.kpi:first-child { border-left: 0; padding-left: 0; }
.kpi::before { content: "[" counter(kpi, upper-alpha) "]"; display: block; font: 500 10px/1 var(--mono); letter-spacing: 0.08em; color: var(--ink-3); margin-bottom: 18px; }
.kpis { counter-reset: kpi; }
.kpi-v { font: 500 64px/0.9 var(--display); letter-spacing: -0.06em; color: var(--ink); font-variant-numeric: tabular-nums; }
.kpi-v small { font: 500 13px/1 var(--mono); letter-spacing: 0.04em; color: var(--accent); margin-left: 6px; vertical-align: top; }
.kpi-l { margin-top: 14px; font-size: 13.5px; line-height: 1.5; color: var(--ink-2); max-width: 240px; }
.kpi-l code { color: var(--ink); }

/* ---------- Sections ---------- */
.section { position: relative; border-bottom: 1px solid var(--line-2); padding: 104px 0 112px; }
.section-alt { background: var(--bg-1); }
.sec-head { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gut); row-gap: 22px; margin-bottom: 72px; }
.sec-head .eyebrow { grid-column: 1 / 4; padding-top: 14px; border-top: 1px solid var(--line-3); align-self: start; }
.sec-head h2 { grid-column: 4 / 13; font-size: clamp(36px, 5.2vw, 76px); letter-spacing: -0.05em; line-height: 0.96; padding-top: 6px; }
.sec-head p { grid-column: 4 / 10; margin: 0; font-size: 17.5px; line-height: 1.6; color: var(--ink-2); }
.sec-head.tight { margin-bottom: 0; }

/* Dossier rows (problems) */
.dossier { list-style: none; margin: 0; padding: 0; border-bottom: 1px solid var(--line-2); }
.dossier li { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gut); padding: 34px 0 36px; border-top: 1px solid var(--line-2); }
.dossier .d-ix { grid-column: 1 / 2; font: 500 11px/1.9 var(--mono); color: var(--accent); }
.dossier .tag { grid-column: 2 / 4; line-height: 1.9; color: var(--ink-3); }
.dossier h3 { grid-column: 4 / 8; font-size: clamp(24px, 2.6vw, 34px); letter-spacing: -0.035em; line-height: 1.05; }
.dossier p { grid-column: 8 / 13; margin: 0; color: var(--ink-2); font-size: 16px; line-height: 1.6; }

/* Spec sheet (features) */
.spec { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line-2); border-left: 1px solid var(--line-2); }
.spec-cell { display: flex; flex-direction: column; padding: 34px 34px 32px; border-right: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); min-height: 460px; background: var(--bg); }
.section-alt .spec-cell { background: var(--bg-1); }
.spec-cell .tag { color: var(--accent); }
.spec-cell h3 { font-size: clamp(26px, 2.6vw, 36px); letter-spacing: -0.04em; line-height: 1.02; margin: 28px 0 16px; max-width: 520px; }
.spec-cell p { margin: 0; color: var(--ink-2); font-size: 15.5px; line-height: 1.65; max-width: 540px; }
.spec-cell p code, .dossier p code, .steps-list p code, .step p code { color: var(--ink); }
.schem { margin: auto 0 0; padding-top: 22px; border-top: 1px dashed var(--line-2); margin-top: 32px; font: 400 12px/1.75 var(--mono); color: var(--ink-2); white-space: pre; overflow-x: auto; scrollbar-width: none; }
.schem b { color: var(--ink-3); font-weight: 400; }
.schem i { color: var(--ok); font-style: normal; }
.schem u { color: var(--accent); text-decoration: none; }
.schem .sg { display: grid; grid-template-columns: var(--gc); column-gap: 18px; white-space: normal; min-width: 0; }
.schem .sg > * { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.schem .sg b { color: var(--ink-3); font-weight: 400; text-transform: uppercase; letter-spacing: 0.06em; font-size: 10.5px; padding-bottom: 4px; }
.schem .big { display: block; font: 300 104px/0.85 var(--display); letter-spacing: -0.07em; color: var(--ink); margin-bottom: 16px; }
.schem .big small { font: 500 16px/1 var(--mono); letter-spacing: 0.04em; color: var(--accent); margin-left: 10px; vertical-align: top; }

/* Manifesto split + steps (how it works) */
.split { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gut); margin-bottom: 72px; }
.split .sec-head { grid-column: 1 / 8; display: block; margin: 0; }
.split .sec-head .eyebrow { display: flex; width: 100%; margin-bottom: 30px; }
.split .sec-head h2 { font-size: clamp(40px, 5.6vw, 84px); margin-bottom: 26px; }
.split .sec-head p { max-width: 520px; }
.steps-list { grid-column: 8 / 13; list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line-3); align-self: start; }
.steps-list li { display: grid; grid-template-columns: 64px minmax(0, 1fr); column-gap: 16px; padding: 22px 0 24px; border-bottom: 1px solid var(--line-2); }
.steps-list .n { grid-row: span 3; font: 300 44px/0.9 var(--display); letter-spacing: -0.05em; color: var(--ink-3); }
.steps-list .tag { color: var(--accent); }
.steps-list h3 { font-size: 21px; letter-spacing: -0.025em; margin: 8px 0 8px; }
.steps-list p { margin: 0; font-size: 14.5px; line-height: 1.6; color: var(--ink-2); }

/* Schematic (architecture figure) */
.arch { margin: 0; border: 1px solid var(--line-2); background: var(--bg); background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 24px 24px; background-position: -1px -1px; }
.fig-head { display: flex; justify-content: space-between; gap: 16px; padding: 12px 16px; border-bottom: 1px solid var(--line-2); background: var(--bg); font: 500 10.5px/1.3 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.fig-head b { color: var(--ink); font-weight: 500; }
.arch-body { padding: 28px; }
.arch-tier { display: grid; grid-template-columns: 200px minmax(0, 1fr); border: 1px solid var(--line-2); background: var(--bg); }
.arch-tier > .label { display: flex; align-items: flex-start; padding: 16px; border-right: 1px solid var(--line-2); line-height: 1.5; color: var(--ink-2); }
.arch-row { display: grid; gap: 1px; background: var(--line-2); }
.arch-row.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.arch-row.c5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.node { background: var(--bg); padding: 16px; font-size: 14px; }
.node b { display: block; font: 600 14.5px/1.2 var(--display); letter-spacing: -0.015em; margin-bottom: 8px; }
.node span { display: block; font: 400 11px/1.5 var(--mono); color: var(--ink-3); }
.arch-tier.kernel-tier { border-color: var(--accent); }
.arch-tier.kernel-tier > .label { color: var(--accent); border-right-color: var(--accent); }
.node.kernel { box-shadow: inset 0 2px 0 var(--accent); }
.arch-flow { display: flex; gap: 18px; padding: 12px 0 12px 216px; font: 500 10.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); position: relative; }
.arch-flow::before { content: ""; position: absolute; left: 100px; top: 0; bottom: 0; border-left: 1px dashed var(--line-3); }
.arch-legend { display: flex; flex-wrap: wrap; gap: 8px 28px; padding: 12px 16px; border-top: 1px solid var(--line-2); background: var(--bg); font: 500 10.5px/1.4 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); }
.arch-legend i { display: inline-block; width: 9px; height: 9px; margin-right: 8px; border: 1px solid var(--line-3); vertical-align: -1px; }
.arch-legend i.k { background: var(--accent); border-color: var(--accent); }

/* Providers index */
.index-table { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 1px; background: var(--line-2); border: 1px solid var(--line-2); }
.provider { position: relative; background: var(--bg-1); padding: 22px 18px 24px; min-height: 190px; display: flex; flex-direction: column; transition: background .15s; }
.section:not(.section-alt) .provider { background: var(--bg); }
.provider:hover { background: var(--bg-2); }
.provider .pm { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--line-3); font: 500 12px/1 var(--mono); color: var(--ink); }
.provider:first-child .pm, .provider:nth-child(2) .pm, .provider:nth-child(3) .pm { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.provider b { margin-top: auto; padding-top: 34px; font: 600 19px/1.1 var(--display); letter-spacing: -0.025em; }
.provider span:not(.pm) { margin-top: 6px; font: 400 11px/1.5 var(--mono); color: var(--ink-3); }
.source-line { margin: 22px 0 0; max-width: 760px; font: 400 13.5px/1.6 var(--sans); color: var(--ink-3); }

/* Video */
.tabs { display: inline-flex; flex-wrap: wrap; border: 1px solid var(--line-2); margin-bottom: -1px; position: relative; z-index: 1; }
.tab { font: 500 11.5px/1 var(--mono); letter-spacing: 0.04em; color: var(--ink-3); background: var(--bg); border: 0; border-right: 1px solid var(--line-2); padding: 13px 16px; cursor: pointer; border-radius: 0; transition: color .15s; }
.tab:last-child { border-right: 0; }
.tab:hover { color: var(--ink); }
.tab[aria-selected="true"] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--accent); }
.video-shell { border: 1px solid var(--line-2); background: #000; }
.vbar { display: flex; justify-content: space-between; align-items: center; height: 36px; padding: 0 14px; border-bottom: 1px solid var(--line-2); background: var(--bg); font: 500 10.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.vbar b { font-weight: 500; color: var(--ink); }
.video-shell video { width: 100%; aspect-ratio: 16 / 9; background: #000; }

/* Quick start */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line-2); border-left: 1px solid var(--line-2); }
.step { display: flex; flex-direction: column; gap: 14px; padding: 28px 26px 26px; border-right: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); background: var(--bg-1); }
.step .num { display: flex; justify-content: space-between; align-items: flex-start; font: 500 10.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.step .num b { font: 300 72px/0.8 var(--display); letter-spacing: -0.06em; color: var(--ink-3); }
.step h3 { margin-top: 26px; font-size: 24px; letter-spacing: -0.03em; }
.step p { margin: 0 0 8px; color: var(--ink-2); font-size: 14.5px; line-height: 1.6; }
.step .cmd { margin-top: auto; }
.reqs { display: flex; flex-wrap: wrap; border-left: 1px solid var(--line-2); }
.chip { display: inline-flex; align-items: center; height: 40px; padding: 0 16px; font: 400 12px/1 var(--mono); color: var(--ink-2); border-right: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); background: var(--bg-1); }
.chip.ok { color: var(--ok); }
.chip.ok::before { content: ""; width: 7px; height: 7px; background: var(--ok); margin-right: 10px; }

/* Compare: spec matrix */
.compare-wrap { overflow-x: auto; border: 1px solid var(--line-2); }
.compare { width: 100%; min-width: 760px; border-collapse: collapse; font-size: 14.5px; }
.compare th, .compare td { text-align: left; vertical-align: top; padding: 18px 20px; border-top: 1px solid var(--line-2); border-left: 1px solid var(--line); }
.compare th:first-child { border-left: 0; }
.compare thead th { border-top: 0; font: 500 10.5px/1.3 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); padding: 16px 20px; background: var(--bg-1); }
.compare tbody th { width: 28%; font: 600 15.5px/1.3 var(--display); letter-spacing: -0.015em; color: var(--ink); }
.compare td { color: var(--ink-2); }
.compare td::before { content: ""; display: inline-block; width: 9px; height: 9px; margin-right: 12px; vertical-align: 1px; border: 1px solid var(--line-3); }
.compare td.yes::before { background: var(--ink-2); border-color: var(--ink-2); }
.compare td.part::before { background: linear-gradient(90deg, var(--ink-3) 50%, transparent 50%); }
.compare td.no::before { border-color: var(--ink-3); }
.compare th:last-child, .compare td:last-child { background: color-mix(in srgb, var(--accent) 6%, transparent); color: var(--ink); }
.compare thead th:last-child { color: var(--accent); box-shadow: inset 0 2px 0 var(--accent); background: color-mix(in srgb, var(--accent) 9%, var(--bg-1)); }
.compare td:last-child.yes::before { background: var(--accent); border-color: var(--accent); }
.compare .num { font-family: var(--mono); color: var(--accent); }

/* Guides contents list */
.guides { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line-3); counter-reset: g; }
.guides li { border-bottom: 1px solid var(--line-2); counter-increment: g; }
.guides a { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gut); align-items: baseline; padding: 30px 0 32px; transition: background .15s; }
.guides a::before { content: "G." counter(g, decimal-leading-zero); grid-column: 1 / 2; font: 500 11px/1 var(--mono); color: var(--accent); }
.guides .tag { grid-column: 2 / 4; }
.guides h3 { grid-column: 4 / 10; font-size: clamp(22px, 2.3vw, 30px); letter-spacing: -0.035em; line-height: 1.1; transition: color .15s; }
.guides p { grid-column: 4 / 10; margin: 10px 0 0; color: var(--ink-2); font-size: 15px; }
.guides a::after { content: "→"; grid-column: 12 / 13; grid-row: 1; justify-self: end; font: 400 22px/1 var(--mono); color: var(--ink-3); transition: transform .2s var(--ease), color .15s; }
.guides a:hover h3, .guides a:hover::after { color: var(--accent); }
.guides a:hover::after { transform: translateX(6px); }

/* FAQ */
.faq-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gut); }
.faq-grid .sec-head { grid-column: 1 / 5; display: block; margin: 0; position: sticky; top: 96px; align-self: start; }
.faq-grid .sec-head .eyebrow { display: flex; width: 100%; margin-bottom: 26px; }
.faq-grid .sec-head h2 { font-size: clamp(36px, 4.4vw, 64px); }
.faq { grid-column: 5 / 13; border-top: 1px solid var(--line-3); counter-reset: q; }
.faq details { border-bottom: 1px solid var(--line-2); counter-increment: q; }
.faq summary { list-style: none; cursor: pointer; display: grid; grid-template-columns: 56px minmax(0, 1fr) 24px; align-items: baseline; padding: 22px 0; font: 600 18px/1.3 var(--display); letter-spacing: -0.02em; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "Q." counter(q, decimal-leading-zero); font: 500 11px/1 var(--mono); color: var(--ink-3); }
.faq summary::after { content: "+"; justify-self: end; font: 400 18px/1 var(--mono); color: var(--ink-3); }
.faq details[open] summary::after { content: "−"; color: var(--accent); }
.faq details[open] summary::before { color: var(--accent); }
.faq .a { padding: 0 24px 26px 56px; color: var(--ink-2); line-height: 1.7; }
.faq .a p { margin: 0; }
.faq .a a { color: var(--accent); }
.faq code { color: var(--ink); }

/* CTA band */
.cta-band { background: var(--accent); color: var(--on-accent); border-bottom: 1px solid var(--accent); }
.cta-band .wrap { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gut); padding: 96px 0 100px; }
.cta-band .eyebrow { grid-column: 1 / 13; color: var(--on-accent); margin-bottom: 30px; }
.cta-band .eyebrow .dot { background: var(--on-accent); }
.cta-band h2 { grid-column: 1 / 11; font-size: clamp(42px, 7vw, 112px); letter-spacing: -0.06em; line-height: 0.9; }
.cta-band p { grid-column: 1 / 7; margin: 36px 0 0; font-size: 18px; line-height: 1.55; }
.cta-band .cta-act { grid-column: 7 / 13; margin-top: 36px; display: flex; flex-direction: column; gap: 10px; align-self: end; }
.cta-band .cmd { background: var(--on-accent); border-color: var(--on-accent); }
.cta-band .cmd .prompt { border-color: rgba(255,255,255,0.14); }
.cta-band .cmd code { color: #f0f0ec; }
.cta-band .copy { color: #a2a5ab; border-color: rgba(255,255,255,0.14); }
.cta-band .btn { border-color: var(--on-accent); color: var(--on-accent); align-self: flex-start; }
.cta-band .btn:hover { background: var(--on-accent); color: var(--accent); }

/* ---------- Footer ---------- */
.site-footer { position: relative; padding: 64px 0 0; font-size: 13.5px; color: var(--ink-3); overflow: hidden; }
.foot-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gut); }
.foot-grid > div:first-child { grid-column: 1 / 6; }
.foot-grid > div:nth-child(2) { grid-column: 7 / 9; }
.foot-grid > div:nth-child(3) { grid-column: 9 / 11; }
.foot-grid > div:nth-child(4) { grid-column: 11 / 13; }
.foot-grid h4 { font: 500 10.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); padding-bottom: 12px; margin-bottom: 14px; border-bottom: 1px solid var(--line-2); }
.foot-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; color: var(--ink-2); }
.foot-grid a:hover { color: var(--accent); }
.foot-grid p { margin: 16px 0 0; max-width: 360px; line-height: 1.6; color: var(--ink-2); }
.foot-grid .brand { border: 0; padding: 0; margin: 0; }
.foot-bottom { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 56px; padding: 16px 0; border-top: 1px solid var(--line-2); font: 500 10.5px/1.4 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; }
.foot-bottom a:hover { color: var(--accent); }
.status-line { display: inline-flex; align-items: center; gap: 10px; color: var(--ink-2); }
.wordmark { font: 600 clamp(80px, 19.5vw, 300px)/0.78 var(--display); letter-spacing: -0.075em; color: var(--bg-2); white-space: nowrap; margin: 24px 0 -0.06em -0.04em; user-select: none; }
:root[data-theme="light"] .wordmark { color: var(--bg-1); }

/* ---------- Blog index ---------- */
.page-head { position: relative; border-bottom: 1px solid var(--line-2); padding: 72px 0 64px; }
.page-head .wrap { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gut); }
.page-head .wrap > nav { grid-column: 1 / 13; }
.page-head h1 { grid-column: 1 / 11; font-size: clamp(44px, 7vw, 108px); letter-spacing: -0.058em; line-height: 0.9; margin: 48px 0 40px; }
.page-head p { grid-column: 5 / 12; margin: 0; font-size: 18px; line-height: 1.6; color: var(--ink-2); }
.post-list { display: block; border-top: 0; padding: 0 0 120px; counter-reset: p; }
.post-card { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gut); padding: 40px 0 44px; border-bottom: 1px solid var(--line-2); counter-increment: p; transition: background .15s; }
.post-card .post-meta { grid-column: 1 / 4; }
.post-card > div:last-child { grid-column: 4 / 12; }
.post-meta { font: 500 10.5px/1.9 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); }
.post-meta::before { content: "N°" counter(p, decimal-leading-zero); display: block; color: var(--accent); margin-bottom: 14px; }
.post-meta time { display: block; color: var(--ink); }
.post-card h2 { font-size: clamp(26px, 3vw, 42px); letter-spacing: -0.045em; line-height: 1.02; margin: 0 0 16px; transition: color .15s; }
.post-card:hover h2 { color: var(--accent); }
.post-card p { margin: 0 0 22px; color: var(--ink-2); font-size: 16px; line-height: 1.6; max-width: 680px; }
.tags { display: flex; flex-wrap: wrap; list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line-2); }
.tags li { font: 500 10.5px/1 var(--mono); letter-spacing: 0.04em; color: var(--ink-2); padding: 8px 11px; border-right: 1px solid var(--line-2); border-top: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); }
.post-card.featured .post-meta::before { content: "N°" counter(p, decimal-leading-zero) " — FEATURED"; }

/* ---------- Article ---------- */
.progress { position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 60; transform-origin: 0 50%; transform: scaleX(0); background: var(--accent); pointer-events: none; }
.crumbs { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; margin: 0; padding: 0; font: 500 10.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.crumbs a:hover { color: var(--accent); }
.crumbs li + li::before { content: "/"; margin-right: 10px; color: var(--line-3); }
.article-head { position: relative; border-bottom: 1px solid var(--line-2); padding: 64px 0 0; }
.article-head h1 { font-size: clamp(38px, 5.6vw, 84px); letter-spacing: -0.052em; line-height: 0.95; margin: 44px 0 34px; max-width: 1050px; }
.article-head .dek { font-size: 19px; line-height: 1.6; color: var(--ink-2); max-width: 760px; margin: 0 0 44px; }
.byline { display: flex; flex-wrap: wrap; border-top: 1px solid var(--line-2); font: 500 10.5px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); }
.byline span { padding: 15px 22px 15px 0; margin-right: 22px; border-right: 1px solid var(--line-2); }
.byline span:last-child { border-right: 0; }
.byline strong { color: var(--ink); font-weight: 500; }
.article-layout { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gut); padding: 64px 0 120px; }
.article-layout > .prose { grid-column: 1 / 9; }
.toc { grid-column: 10 / 13; position: sticky; top: 88px; align-self: start; border-top: 1px solid var(--line-3); padding-top: 14px; }
.toc .label { display: block; margin-bottom: 14px; }
.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: t; border-left: 1px solid var(--line-2); }
.toc ol li { counter-increment: t; }
.toc ol a { display: grid; grid-template-columns: 26px minmax(0, 1fr); padding: 7px 0 7px 12px; margin-left: -1px; border-left: 1px solid transparent; font-size: 13px; line-height: 1.4; color: var(--ink-3); transition: color .15s, border-color .15s; }
.toc ol a::before { content: counter(t, decimal-leading-zero); font: 500 10px/1.9 var(--mono); color: var(--ink-3); }
.toc ol a:hover { color: var(--ink); }
.toc ol a.active { color: var(--ink); border-left-color: var(--accent); }
.toc ol a.active::before { color: var(--accent); }
.toc a.btn { display: flex; margin-top: 4px; width: 100%; }

.prose { max-width: 720px; font-size: 17.5px; line-height: 1.75; color: var(--ink-2); }
.prose > * + * { margin-top: 1.2em; }
.prose p, .prose ul, .prose ol { margin-bottom: 0; }
.prose h2 { color: var(--ink); font-size: clamp(28px, 3.2vw, 40px); letter-spacing: -0.045em; line-height: 1.02; margin-top: 2.6em; padding-top: 22px; border-top: 1px solid var(--line-3); scroll-margin-top: 80px; }
.prose h2 .hn { display: block; font: 500 10.5px/1 var(--mono); letter-spacing: 0.08em; color: var(--accent); margin-bottom: 20px; }
.prose h2 .hn::before { content: "["; color: var(--ink-3); }
.prose h2 .hn::after { content: "]"; color: var(--ink-3); }
.prose h3 { color: var(--ink); font-size: 21px; letter-spacing: -0.025em; margin-top: 2em; scroll-margin-top: 80px; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 4px; }
.prose a:hover { color: var(--accent); }
.prose ul, .prose ol { padding-left: 1.2em; }
.prose li + li { margin-top: 0.5em; }
.prose ul li::marker { content: "—  "; color: var(--ink-3); }
.prose ol li::marker { font: 500 0.75em var(--mono); color: var(--accent); }
.prose code { font-size: 0.82em; color: var(--ink); background: var(--bg-2); border: 1px solid var(--line); padding: 0.12em 0.36em; }
.prose pre { margin: 0; background: var(--console); color: #d9dbe0; border: 1px solid var(--line-2); padding: 20px 22px; overflow-x: auto; font-size: 13px; line-height: 1.7; }
.prose pre code { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; }
.code-wrap { position: relative; }
.code-wrap .code-copy { position: absolute; top: 0; right: 0; height: 32px; border-bottom: 1px solid rgba(255,255,255,0.12); background: #0e1013; color: #8a8e96; opacity: 0; transition: opacity .15s; }
.code-wrap:hover .code-copy, .code-wrap .code-copy:focus-visible, .code-wrap .code-copy.done { opacity: 1; }
.code-wrap .code-copy.done { color: var(--on-accent); background: var(--ok); }
.prose blockquote { margin: 0; padding-left: 20px; border-left: 2px solid var(--accent); color: var(--ink); font-size: 20px; }
.prose table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 1.55; border: 1px solid var(--line-2); }
.prose th, .prose td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line-2); border-left: 1px solid var(--line); vertical-align: top; }
.prose th { font: 500 10.5px/1.3 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); background: var(--bg-1); }
.prose td code { white-space: nowrap; }
.prose hr { border: 0; border-top: 1px solid var(--line-2); margin: 2.4em 0; }
.callout { border: 1px solid var(--line-2); background: var(--bg-1); padding: 22px 24px; font-size: 16px; }
.callout .label { display: block; margin-bottom: 12px; color: var(--accent); }
.callout ul { margin: 0; }
.callout p:last-child, .callout ul:last-child { margin-bottom: 0; }
.callout.tldr { border-top: 2px solid var(--accent); }
.callout.signal { border-left: 2px solid var(--ok); }
.callout.signal .label { color: var(--ok); }
.article-foot { margin-top: 3.4em; padding-top: 18px; border-top: 1px solid var(--line-3); }
.next-read { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 16px; border-top: 1px solid var(--line-2); border-left: 1px solid var(--line-2); }
.next-read a { display: block; padding: 22px; border-right: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); text-decoration: none; color: var(--ink); font: 600 17px/1.3 var(--display); letter-spacing: -0.02em; transition: color .15s, background .15s; }
.next-read a:hover { color: var(--accent); background: var(--bg-1); }
.next-read .label { display: block; margin-bottom: 12px; color: var(--accent); }

/* ---------- Chinese typography ---------- */
:lang(zh) h1, :lang(zh) h2, :lang(zh) h3, :lang(zh) h4 { font-weight: 600; letter-spacing: -0.01em; line-height: 1.12; }
:lang(zh) .hero h1 { font-size: clamp(40px, 6vw, 92px); letter-spacing: -0.02em; line-height: 1.04; }
:lang(zh) .sec-head h2, :lang(zh) .split .sec-head h2, :lang(zh) .faq-grid .sec-head h2 { letter-spacing: -0.02em; line-height: 1.1; }
:lang(zh) .cta-band h2, :lang(zh) .page-head h1, :lang(zh) .article-head h1 { letter-spacing: -0.02em; line-height: 1.06; }
:lang(zh) .prose h2, :lang(zh) .post-card h2, :lang(zh) .guides h3, :lang(zh) .dossier h3, :lang(zh) .spec-cell h3 { letter-spacing: -0.01em; line-height: 1.2; }
:lang(zh) body { letter-spacing: 0.01em; }
:lang(zh) .hero-lede, :lang(zh) .sec-head p, :lang(zh) .page-head p, :lang(zh) .article-head .dek { line-height: 1.8; }
:lang(zh) .prose { line-height: 1.95; }
:lang(zh) .dossier p, :lang(zh) .spec-cell p, :lang(zh) .steps-list p, :lang(zh) .step p, :lang(zh) .faq .a { line-height: 1.85; }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .hero-copy { grid-column: 1 / 13; padding: 56px 0 48px; }
  .term { grid-column: 1 / 13; border-left: 1px solid var(--line-2); border-right: 1px solid var(--line-2); border-top: 1px solid var(--line-2); }
  .hero h1 { margin-bottom: 40px; }
  .split .sec-head, .steps-list { grid-column: 1 / 13; }
  .steps-list { margin-top: 48px; }
  .index-table { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .faq-grid .sec-head { grid-column: 1 / 13; position: static; margin-bottom: 40px; }
  .faq { grid-column: 1 / 13; }
  .article-layout > .prose { grid-column: 1 / 13; }
  .toc { display: none; }
  .arch-row.c5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  :root { --fw: calc(100vw - 36px); --gut: 16px; }
  .nav-links { display: none; position: absolute; top: 56px; left: 0; right: 0; flex-direction: column; background: var(--bg); border-bottom: 1px solid var(--line-2); }
  .nav-links.open { display: flex; }
  .nav-links a { height: auto; padding: 16px 18px; border-top: 1px solid var(--line); }
  .nav-toggle { display: inline-grid; }
  .nav-end .btn { display: none; }
  .brand { border-right: 0; margin-right: 0; }
  .hero-meta .m-a { grid-column: 1 / 13; }
  .hero-meta .m-b { grid-column: 1 / 13; border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
  .hero-meta .m-c { display: none; }
  .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kpi:nth-child(3) { border-left: 0; padding-left: 0; }
  .kpi:nth-child(n+3) { border-top: 1px solid var(--line); }
  .kpi-v { font-size: 52px; }
  .section { padding: 72px 0 80px; }
  .sec-head { margin-bottom: 48px; }
  .sec-head .eyebrow, .sec-head h2, .sec-head p { grid-column: 1 / 13; }
  .dossier li { row-gap: 12px; }
  .dossier .d-ix { grid-column: 1 / 3; }
  .dossier .tag { grid-column: 3 / 13; }
  .dossier h3, .dossier p { grid-column: 1 / 13; }
  .spec { grid-template-columns: minmax(0, 1fr); }
  .spec-cell { min-height: 0; padding: 28px 22px; }
  .schem .big { font-size: 84px; }
  .arch-body { padding: 16px; }
  .arch-tier { grid-template-columns: minmax(0, 1fr); }
  .arch-tier > .label { border-right: 0; border-bottom: 1px solid var(--line-2); }
  .arch-tier.kernel-tier > .label { border-bottom-color: var(--accent); }
  .arch-row.c3, .arch-row.c5 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .arch-flow { padding-left: 24px; }
  .arch-flow::before { left: 10px; }
  .index-table { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: minmax(0, 1fr); }
  .guides a { row-gap: 10px; }
  .guides a::before { grid-column: 1 / 3; }
  .guides .tag { grid-column: 3 / 12; }
  .guides h3, .guides p { grid-column: 1 / 12; }
  .guides a::after { grid-column: 12 / 13; }
  .cta-band .wrap { padding: 72px 0; }
  .cta-band h2, .cta-band p, .cta-band .cta-act { grid-column: 1 / 13; }
  .foot-grid { row-gap: 32px; }
  .foot-grid > div:first-child { grid-column: 1 / 13; }
  .foot-grid > div:nth-child(2) { grid-column: 1 / 5; }
  .foot-grid > div:nth-child(3) { grid-column: 5 / 9; }
  .foot-grid > div:nth-child(4) { grid-column: 9 / 13; }
  .page-head h1, .page-head p { grid-column: 1 / 13; }
  .post-card .post-meta, .post-card > div:last-child { grid-column: 1 / 13; }
  .post-meta { margin-bottom: 14px; }
  .next-read { grid-template-columns: minmax(0, 1fr); }
  .prose table { display: block; overflow-x: auto; }
}
@media (max-width: 560px) {
  .hero h1 { font-size: 46px; }
  :lang(zh) .hero h1 { font-size: 40px; }
  .hero-lede { font-size: 16.5px; }
  .term { font-size: 11px; }
  .term-body { min-height: 330px; padding: 14px 12px; }
  .term-tab { padding: 0 10px; }
  .term-tab .ix { display: none; }
  .deck-stats dd { font-size: 12px; }
  .index-table { grid-template-columns: minmax(0, 1fr); }
  .provider { min-height: 0; }
  .provider b { padding-top: 18px; }
  .arch-row.c3, .arch-row.c5 { grid-template-columns: minmax(0, 1fr); }
  .foot-grid > div:nth-child(2), .foot-grid > div:nth-child(3), .foot-grid > div:nth-child(4) { grid-column: 1 / 13; }
  .faq summary { grid-template-columns: 44px minmax(0, 1fr) 20px; font-size: 16.5px; }
  .faq .a { padding-left: 44px; padding-right: 0; }
  .prose { font-size: 16.5px; }
  .brand-tag { display: none; }
  .byline span { padding-right: 14px; margin-right: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
  .term pre.anim .tl { opacity: 1; }
}