:root {
  --bg: #15110d;
  --bg-soft: #1e1711;
  --panel: rgba(255, 248, 239, 0.045);
  --panel-strong: rgba(255, 248, 239, 0.075);
  --line: rgba(239, 215, 195, 0.16);
  --text: #f7efe8;
  --muted: #c8b7aa;
  --sand: #d59a61;
  --sand-bright: #edbe97;
  --sand-dark: #a96c2d;
  --cream: #efd7c3;
  --shadow: 0 26px 70px rgba(0, 0, 0, 0.28);
  --radius: 24px;
  --shell: min(1160px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 82% 12%, rgba(181, 113, 41, 0.16), transparent 28rem),
    radial-gradient(circle at 10% 38%, rgba(239, 215, 195, 0.08), transparent 24rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--sand-bright); outline-offset: 4px; border-radius: 4px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
button { font: inherit; }

.shell { width: var(--shell); margin-inline: auto; }

.site-header {
  width: var(--shell);
  margin: 0 auto;
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.brand img { display: block; width: 168px; height: auto; }
.brand-tagline {
  margin-right: auto;
  color: var(--cream);
  font-size: 0.82rem;
  font-weight: 650;
  letter-spacing: 0.025em;
  white-space: nowrap;
  opacity: 0.82;
}
nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 22px; color: var(--muted); font-size: 0.94rem; }
nav a:hover, .footer-links a:hover { color: var(--text); }
nav .lang { color: var(--sand-bright); }

.hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(500px, 1.1fr);
  gap: clamp(38px, 5vw, 68px);
  align-items: center;
  padding: 82px 0 96px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--sand-bright);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1 {
  margin-bottom: 24px;
  max-width: 700px;
  font-size: clamp(3.1rem, 5.8vw, 5.7rem);
  line-height: 0.98;
  letter-spacing: -0.058em;
  font-weight: 760;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(2.1rem, 4vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

h3 { margin-bottom: 8px; font-size: 1.08rem; }
.lede { max-width: 680px; color: var(--muted); font-size: clamp(1.05rem, 1.55vw, 1.27rem); }
.hero-line { display: block; }
.zh-page .hero-copy h1 { font-size: clamp(3.05rem, 4.8vw, 5.05rem); }
.zh-page .hero-line { white-space: nowrap; }
.zh-page .hero-line + .hero-line { margin-top: 8px; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 700;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}
.button:hover { transform: translateY(-1px); border-color: rgba(239, 215, 195, 0.34); }
.button.primary { background: var(--sand); color: #1a1109; border-color: transparent; }
.button.primary:hover { background: var(--sand-bright); }
.button.secondary { background: rgba(255, 255, 255, 0.025); }

.trust-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 26px;
  color: var(--cream);
  font-size: 0.86rem;
}
.trust-line span { position: relative; padding-left: 14px; }
.trust-line span::before { content: "·"; position: absolute; left: 0; color: var(--sand); }

.hero-demo { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: stretch; }
.terminal {
  min-height: 220px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #0f0d0b;
  font: 0.93rem/1.65 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.hero-terminal { min-height: 255px; padding: 28px 24px; box-shadow: var(--shadow); }
.terminal.muted { opacity: 0.7; }
.terminal.live { border-color: rgba(213, 154, 97, 0.55); box-shadow: inset 0 0 0 1px rgba(213, 154, 97, 0.07), var(--shadow); }
.terminal-label { margin-bottom: 34px; color: var(--muted); font: 700 0.72rem/1.4 ui-sans-serif, sans-serif; letter-spacing: 0.1em; text-transform: uppercase; }
.prompt { color: var(--sand-bright); }
.agent { color: #f7efe8; }

.section { padding: 104px 0; border-top: 1px solid var(--line); }
.first-section { padding-top: 96px; }
.section-heading { max-width: 780px; }
.section-heading.narrow { max-width: 700px; }
.section-heading > p:last-child, .proof-copy > p:last-child, .install > p { color: var(--muted); font-size: 1.06rem; }

.install { padding-bottom: 112px; }
.copy-block { position: relative; max-width: 930px; margin-top: 30px; }
.install pre { margin: 0; padding: 20px 72px 20px 22px; overflow-x: auto; border: 1px solid rgba(213, 154, 97, 0.38); border-radius: 16px; background: #0f0d0b; color: var(--cream); }
.install code { font: 0.88rem/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.copy-button {
  position: absolute;
  top: 50%;
  right: 14px;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  transform: translateY(-50%);
  border: 1px solid var(--line);
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--cream);
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease, color 140ms ease;
}
.copy-button:hover { border-color: rgba(239, 215, 195, 0.38); background: rgba(255, 255, 255, 0.06); }
.copy-button.copied { color: var(--sand-bright); border-color: rgba(213, 154, 97, 0.52); }
.copy-button svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.install-actions { margin-top: 16px; }
.microcopy { max-width: 760px; margin-top: 24px; color: var(--muted); font-size: 0.94rem !important; }

.use-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 42px; }
.use-grid article { min-height: 260px; padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: var(--panel); }
.use-grid article.checkpoint-step { border-color: rgba(213, 154, 97, 0.42); background: linear-gradient(160deg, rgba(213, 154, 97, 0.09), var(--panel)); }
.step-number { display: block; margin-bottom: 42px; color: var(--sand); font: 700 0.72rem/1 ui-monospace, monospace; }
.use-grid p { color: var(--muted); margin-bottom: 0; }
.use-grid code { color: var(--cream); background: rgba(255, 255, 255, 0.055); border-radius: 5px; padding: 0.08em 0.34em; }
.intent-link {
  appearance: none;
  margin: 0;
  padding: 0;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: transparent;
  color: var(--cream);
  cursor: pointer;
  line-height: inherit;
}
.intent-link:hover { color: var(--sand-bright); }

.question-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 42px; }
.question-grid article { min-height: 190px; padding: 26px; border: 1px solid var(--line); border-radius: 18px; background: var(--panel); }
.question-grid h3 { color: var(--cream); }
.question-grid p { color: var(--muted); margin-bottom: 0; }

.concept strong { color: var(--cream); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 42px; }
.feature-grid article { min-height: 190px; padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: var(--panel); }
.feature-grid article > span { display: block; margin-bottom: 48px; color: var(--sand); font: 700 0.72rem/1 ui-monospace, monospace; }
.feature-grid p { color: var(--muted); margin-bottom: 0; }

.proof { display: grid; grid-template-columns: 1fr 0.9fr; gap: clamp(50px, 8vw, 120px); align-items: end; }
.proof-stats { display: grid; gap: 10px; }
.proof-stats > div { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; padding: 18px 0; border-top: 1px solid var(--line); }
.proof-stats > div:last-child { border-bottom: 1px solid var(--line); }
.proof-stats strong { color: var(--sand-bright); font-size: 1.25rem; }
.proof-stats span { color: var(--muted); text-align: right; font-size: 0.9rem; }

.zh-page .proof-copy h2 {
  white-space: nowrap;
  font-size: clamp(2.1rem, 3.4vw, 3.15rem);
}


.intent-dialog {
  width: min(560px, calc(100% - 32px));
  max-width: 560px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text);
}
.intent-dialog::backdrop { background: rgba(8, 6, 4, 0.72); backdrop-filter: blur(5px); }
.dialog-card { position: relative; padding: 30px; border: 1px solid rgba(213, 154, 97, 0.34); border-radius: 20px; background: #18130f; box-shadow: var(--shadow); }
.dialog-card h2 { margin-bottom: 22px; font-size: clamp(1.55rem, 4vw, 2.25rem); letter-spacing: -0.03em; }
.dialog-close { position: absolute; top: 14px; right: 14px; width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--muted); cursor: pointer; font-size: 1.35rem; line-height: 1; }
.dialog-close:hover { color: var(--text); border-color: rgba(239, 215, 195, 0.34); }
.trigger-list { display: flex; flex-wrap: wrap; gap: 10px; }
.trigger-list code { padding: 8px 11px; border: 1px solid var(--line); border-radius: 9px; background: rgba(255, 255, 255, 0.035); color: var(--cream); font-size: 0.88rem; }
.dialog-note { margin: 22px 0 0; color: var(--muted); font-size: 0.9rem; }

.site-footer { display: flex; justify-content: space-between; gap: 24px; padding: 34px 0 46px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
.site-footer strong { color: var(--text); margin-right: 12px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }

@media (max-width: 900px) {
  .brand-tagline { display: none; }
}

@media (max-width: 1050px) {
  .hero { grid-template-columns: 1fr; min-height: 0; padding-top: 72px; }
  .hero-copy { max-width: 780px; }
  .hero-demo { max-width: 820px; }
  .use-grid { grid-template-columns: 1fr 1fr; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .proof { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .site-header { align-items: flex-start; padding: 22px 0; }
  .brand img { width: 145px; }
  nav { gap: 12px 16px; }
  .hero-demo, .question-grid { grid-template-columns: 1fr; }
  .hero-terminal { min-height: 210px; }
}

@media (max-width: 560px) {
  .zh-page .proof-copy h2 { white-space: normal; }
}

@media (max-width: 640px) {
  :root { --shell: min(100% - 28px, 1160px); }
  .site-header { display: block; }
  nav { justify-content: flex-start; margin-top: 18px; }
  .hero { padding: 60px 0 82px; gap: 44px; }
  h1 { font-size: clamp(3rem, 15vw, 4.7rem); }
  .zh-page .hero-copy h1 { font-size: clamp(2.85rem, 13vw, 4.1rem); }
  .section { padding: 82px 0; }
  .use-grid, .feature-grid { grid-template-columns: 1fr; }
  .use-grid article { min-height: 0; }
  .step-number { margin-bottom: 28px; }
  .copy-block pre { padding-right: 62px; }
  .copy-button { right: 10px; width: 38px; height: 38px; }
  .site-footer { display: block; }
  .footer-links { margin-top: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button, .copy-button { transition: none; }
}