:root {
  --page: #f7f8f5;
  --surface: #ffffff;
  --ink: #151b1a;
  --muted: #5c6865;
  --line: #d7ddda;
  --line-strong: #9ba8a3;
  --teal: #087f72;
  --teal-dark: #075e56;
  --amber: #c77a13;
  --blue: #2f61c9;
  --red: #b4453e;
  --code: #111817;
  --code-ink: #d8e5e1;
  --radius: 6px;
  --content: 1160px;
  --shadow: 0 12px 28px rgba(24, 38, 34, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--page);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  letter-spacing: 0;
}
button, input, textarea, select { font: inherit; letter-spacing: 0; }
a { color: inherit; }
img { max-width: 100%; display: block; }
code, pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  letter-spacing: 0;
}
code { font-size: 0.9em; }
p code, td code { color: var(--teal-dark); font-weight: 650; }

html[lang^="zh"] [data-lang="en"],
html[lang^="en"] [data-lang="zh"] { display: none !important; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  transform: translateY(-150%);
  padding: 8px 12px;
  background: var(--ink);
  color: #fff;
  border-radius: 4px;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(247, 248, 245, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.header-inner {
  max-width: var(--content);
  min-width: 0;
  min-height: 64px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 30px;
}
.brand, .footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 760;
}
.brand img { width: 32px; height: 32px; }
.primary-nav {
  min-width: 0;
  display: flex;
  justify-content: center;
  gap: 24px;
  white-space: nowrap;
}
.primary-nav a, .github-link {
  color: var(--muted);
  font-size: 0.88rem;
  text-decoration: none;
  font-weight: 650;
}
.primary-nav a:hover, .github-link:hover, .primary-nav a.active { color: var(--ink); }
.header-actions { display: flex; align-items: center; gap: 16px; }
.segmented {
  display: inline-grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  overflow: hidden;
  background: var(--surface);
}
.segmented button {
  min-width: 42px;
  min-height: 34px;
  padding: 5px 10px;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 740;
}
.segmented button:last-child { border-right: 0; }
.segmented button[aria-pressed="true"] { background: var(--ink); color: #fff; }
.segmented button:focus-visible, .copy-button:focus-visible, a:focus-visible {
  outline: 3px solid rgba(47, 97, 201, 0.35);
  outline-offset: 2px;
}

.hero {
  min-height: min(720px, calc(100vh - 112px));
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background-color: var(--surface);
  background-image:
    linear-gradient(rgba(21, 27, 26, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(21, 27, 26, 0.045) 1px, transparent 1px);
  background-size: 32px 32px;
}
.hero-inner {
  width: 100%;
  max-width: var(--content);
  margin: 0 auto;
  padding: 48px 24px;
}
.eyebrow, .kicker {
  color: var(--teal-dark);
  text-transform: uppercase;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
}
.eyebrow { display: flex; align-items: center; gap: 9px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #18a572; box-shadow: 0 0 0 4px rgba(24, 165, 114, 0.13); }
.hero h1 {
  margin: 16px 0 16px;
  max-width: 960px;
  font-size: 7.2rem;
  line-height: 0.98;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}
.hero-lead {
  max-width: 850px;
  margin: 0;
  font-size: clamp(1.3rem, 2.4vw, 2rem);
  line-height: 1.42;
  font-weight: 630;
}
.hero-detail { max-width: 760px; margin: 18px 0 0; color: var(--muted); font-size: 1.02rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.button {
  min-height: 44px;
  padding: 10px 17px;
  border: 1px solid var(--ink);
  border-radius: 5px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 750;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.button.primary { background: var(--ink); color: #fff; }
.button.primary:hover { background: var(--teal-dark); border-color: var(--teal-dark); }
.button.secondary { background: var(--surface); color: var(--ink); }
.button.secondary:hover { border-color: var(--teal); color: var(--teal-dark); }
.command-bar {
  width: min(620px, 100%);
  min-height: 56px;
  margin-top: 30px;
  padding: 8px 8px 8px 16px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  background: var(--code);
  color: var(--code-ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.command-bar .prompt { color: #59cdb8; font-weight: 800; }
.command-bar code { overflow-wrap: anywhere; }
.copy-button {
  min-height: 34px;
  padding: 6px 10px;
  border: 1px solid #41504c;
  border-radius: 4px;
  background: #202a28;
  color: #e8f0ed;
  cursor: pointer;
  font-size: 0.76rem;
  font-weight: 750;
  white-space: nowrap;
}
.copy-button:hover { background: #2c3a37; }

.section { border-bottom: 1px solid var(--line); }
.section-inner { max-width: var(--content); margin: 0 auto; padding: 100px 24px; }
.section-heading { max-width: 760px; margin-bottom: 52px; }
.section-heading.wide { max-width: 900px; }
.section-heading .kicker, .security-layout .kicker { margin: 0 0 10px; }
.section-heading h2, .security-layout h2 {
  margin: 0;
  font-size: 3.4rem;
  line-height: 1.12;
  letter-spacing: 0;
}
.section-heading > p:last-child { color: var(--muted); font-size: 1.05rem; margin: 18px 0 0; }

.quick-understanding { background: var(--page); }
.quick-understanding .section-inner { padding-top: 24px; }
.capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line-strong); }
.capability-grid article { min-width: 0; padding: 28px 30px 0 0; border-right: 1px solid var(--line); }
.capability-grid article + article { padding-left: 30px; }
.capability-grid article:last-child { border-right: 0; }
.capability-grid .index { color: var(--amber); font-family: monospace; font-size: 0.8rem; font-weight: 800; }
.capability-grid h3 { margin: 12px 0 8px; font-size: 1.14rem; }
.capability-grid p { min-height: 82px; margin: 0 0 18px; color: var(--muted); }
.capability-grid > article > code { display: block; overflow-wrap: anywhere; color: var(--teal-dark); }

.architecture-section { background: var(--surface); }
.architecture-figure { margin: 0; }
.architecture-figure picture { display: block; }
.architecture-figure img { width: 100%; aspect-ratio: 12 / 5; object-fit: contain; border: 1px solid var(--line); border-radius: var(--radius); background: #f2f5f1; }
.architecture-figure figcaption { margin-top: 13px; color: var(--muted); font-size: 0.86rem; }

.table-wrap { overflow-x: auto; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--line-strong); }
table { width: 100%; min-width: 780px; border-collapse: collapse; background: var(--surface); }
th, td { padding: 20px 18px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
thead th { background: #eef1ed; color: var(--muted); font-size: 0.75rem; text-transform: uppercase; }
tbody th { width: 170px; color: var(--teal-dark); }
tbody td { width: calc((100% - 170px) / 2); color: #3c4744; }

.inject-section { background: #eef2ef; }
.steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line-strong); }
.steps > li { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 24px; padding: 42px 0; border-bottom: 1px solid var(--line); }
.step-number { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--ink); border-radius: 50%; font-family: monospace; font-weight: 800; }
.steps h3 { margin: 4px 0 18px; font-size: 1.35rem; }
pre { margin: 0; padding: 20px; overflow: auto; background: var(--code); color: var(--code-ink); border-radius: var(--radius); font-size: 0.84rem; line-height: 1.62; }
.steps pre { max-width: 790px; }
.code-with-copy { position: relative; max-width: 100%; }
.code-with-copy .copy-button { position: absolute; top: 10px; right: 10px; }
.callout { max-width: 790px; margin: 14px 0 0; padding: 12px 14px; border-left: 3px solid var(--amber); background: #fff8e9; color: #624512; }
.discovery-block { margin-top: 72px; display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: 64px; align-items: start; }
.discovery-block h3 { margin: 8px 0; font-size: 1.55rem; }
.discovery-block p:not(.kicker) { color: var(--muted); }
.os-switch { margin-bottom: 14px; }
.os-panel { min-height: 160px; padding: 12px 18px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.os-panel code { display: block; padding: 8px 0; overflow-wrap: anywhere; border-bottom: 1px solid var(--line); color: var(--teal-dark); }
.os-panel code:last-child { border-bottom: 0; }

.protocol-section { background: var(--surface); }
.protocol-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.protocol-grid article { min-width: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--code); }
.protocol-grid article header { min-height: 48px; padding: 10px 16px; display: flex; align-items: center; gap: 12px; background: #e9efec; border-bottom: 1px solid var(--line); }
.protocol-grid article header span { color: var(--teal-dark); font-family: monospace; font-size: 0.8rem; }
.protocol-grid pre { border-radius: 0; min-height: 356px; }
.failure-policy { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 36px; }
.failure-policy article { padding: 26px; border: 1px solid var(--line); border-top-width: 4px; border-radius: var(--radius); }
.failure-policy .policy-open { border-top-color: var(--amber); background: #fffaf0; }
.failure-policy .policy-closed { border-top-color: var(--red); background: #fff7f5; }
.policy-label { margin: 0; font-family: monospace; font-size: 0.76rem; font-weight: 800; }
.policy-open .policy-label { color: #98600d; }
.policy-closed .policy-label { color: var(--red); }
.failure-policy h3 { margin: 8px 0; }
.failure-policy p:last-child { color: var(--muted); margin-bottom: 0; }
.hook-reference { margin-top: 50px; }
.hook-reference h3 { margin-bottom: 15px; }
.hook-list { display: flex; flex-wrap: wrap; gap: 8px; }
.hook-list code { padding: 7px 10px; background: #edf1ef; border: 1px solid var(--line); border-radius: 4px; color: var(--teal-dark); }

.agents-section { background: var(--page); }
.agent-paths { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.agent-paths article, .install-grid article { min-width: 0; padding: 26px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.agent-paths h3 { min-height: 42px; margin: 0 0 10px; }
.agent-paths p { min-height: 86px; color: var(--muted); }
.agent-paths pre { min-height: 160px; }

.install-section { background: #f2f0e8; }
.install-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.platform-title { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.platform-title h3 { margin: 0; }
.platform-mark { width: 38px; height: 38px; display: grid; place-items: center; background: var(--ink); color: #fff; border-radius: 5px; font-family: monospace; font-size: 0.8rem; }
.install-grid pre { min-height: 145px; padding-top: 56px; white-space: pre-wrap; overflow-wrap: anywhere; }
.next-commands { margin-top: 24px; display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line-strong); }
.next-commands code { padding: 15px 12px; border-bottom: 1px solid var(--line); color: var(--teal-dark); overflow-wrap: anywhere; }

.security-section { background: var(--ink); color: #f1f5f3; }
.security-layout { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 80px; }
.security-layout .kicker { color: #65d3c2; }
.security-points { color: #c2ceca; }
.security-points ul { padding-left: 20px; }
.security-points li { margin: 8px 0; }
.text-link { display: inline-block; margin-top: 16px; color: #6dd8c7; font-weight: 750; text-decoration: none; }
.text-link:hover { text-decoration: underline; }

.site-footer { background: #0b100f; color: #aab7b3; }
.footer-inner { max-width: var(--content); margin: 0 auto; padding: 38px 24px; display: grid; grid-template-columns: auto 1fr auto; gap: 30px; align-items: center; }
.footer-brand { color: #fff; }
.footer-inner p { margin: 0; font-size: 0.82rem; }
.footer-links { display: flex; gap: 18px; }
.footer-links a { color: #d2ddda; font-size: 0.82rem; text-decoration: none; }
.footer-links a:hover { color: #fff; }

@media (max-width: 900px) {
  .header-inner { grid-template-columns: auto 1fr; gap: 16px; }
  .primary-nav { grid-column: 1 / -1; grid-row: 2; width: 100%; max-width: 100%; justify-content: flex-start; overflow-x: auto; padding: 0 0 10px; }
  .header-actions { grid-column: 2; grid-row: 1; justify-self: end; }
  .hero { min-height: auto; }
  .hero-inner { padding-top: 72px; }
  .hero h1 { font-size: 4.8rem; }
  .section-heading h2, .security-layout h2 { font-size: 2.8rem; }
  .capability-grid { grid-template-columns: 1fr; }
  .capability-grid article, .capability-grid article + article { padding: 24px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .capability-grid p { min-height: auto; }
  .discovery-block, .security-layout { grid-template-columns: 1fr; gap: 38px; }
  .protocol-grid, .failure-policy, .agent-paths, .install-grid { grid-template-columns: 1fr; }
  .agent-paths h3, .agent-paths p { min-height: auto; }
  .architecture-figure img { aspect-ratio: auto; }
  .footer-inner { grid-template-columns: 1fr; gap: 14px; }
}

@media (max-width: 620px) {
  .header-inner { padding: 10px 16px 0; }
  .brand span { font-size: 0.92rem; }
  .github-link { display: none; }
  .primary-nav { gap: 16px; scrollbar-width: none; }
  .primary-nav::-webkit-scrollbar { display: none; }
  .primary-nav a { font-size: 0.8rem; }
  .hero-inner { padding: 64px 18px 70px; }
  .hero h1 { font-size: 3rem; line-height: 1.05; }
  .hero-lead { font-size: 1.3rem; }
  .section-inner { padding: 72px 18px; }
  .section-heading { margin-bottom: 38px; }
  .section-heading h2, .security-layout h2 { font-size: 2.25rem; }
  .steps > li { grid-template-columns: 42px minmax(0, 1fr); gap: 14px; }
  .step-number { width: 36px; height: 36px; }
  pre { padding: 16px; font-size: 0.74rem; }
  .code-with-copy pre { padding-top: 58px; }
  .protocol-grid pre { min-height: auto; }
  .next-commands { grid-template-columns: 1fr; }
  .command-bar { grid-template-columns: auto minmax(0, 1fr); }
  .command-bar .copy-button { grid-column: 1 / -1; width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}