:root {
  --bg: #050607;
  --panel: #0b0d0f;
  --panel-strong: #0e1114;
  --line: #202428;
  --line-soft: #171b20;
  --text: #eef2f5;
  --muted: #8a929a;
  --soft: #626a72;
  --green: #8ee3ad;
  --blue: #9eb6ff;
  --purple: #c0a7ff;
  color: var(--text);
  background: var(--bg);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Microsoft YaHei", monospace;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
a, button { -webkit-tap-highlight-color: transparent; }
.shell { width: min(980px, calc(100% - 34px)); margin: 0 auto; }

.site-header {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
  color: #9aa2aa;
  font-size: 13px;
}
.brand { display: inline-flex; align-items: center; gap: 7px; color: #fff; font-weight: 700; letter-spacing: -0.02em; }
.prompt { color: var(--green); }
.top-nav { display: flex; align-items: center; gap: 18px; }
.top-nav a { color: #8c959d; }
.top-nav a:hover { color: #fff; }

.hero { padding: 92px 0 64px; border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0 0 17px; color: #69727a; font-size: 11px; font-weight: 700; letter-spacing: 0.14em; }
.hero h1, .section h2 { font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif; }
.hero h1 { margin: 0 0 20px; font-size: clamp(3.2rem, 8vw, 4.6rem); line-height: .98; letter-spacing: -0.065em; }
.cursor { color: var(--green); }
.hero-lead { max-width: 790px; margin: 0; color: var(--muted); font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; font-size: 18px; line-height: 1.75; }
.hero-note { margin: 14px 0 0; color: #69727b; font-size: 12px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 26px; font-size: 13px; }
.text-link { color: #d3d9df; }
.text-link:hover { color: #fff; }
.install-command { margin: 17px 0 0; color: #69727b; font-size: 12px; }

.terminal-card { overflow: hidden; margin-top: 48px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.terminal-bar { min-height: 40px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 0 14px; border-bottom: 1px solid var(--line); color: #626970; font-size: 12px; }
.terminal-body { padding: 22px; color: #bdc4cb; font-size: 13px; line-height: 1.8; }
.terminal-body p { margin: 0 0 10px; }
.terminal-body p:last-child { margin-bottom: 0; }
.tool { color: var(--blue); }
.reason { color: var(--purple); }
.success { color: var(--green); }

.section { padding: 68px 0; border-bottom: 1px solid var(--line); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 28px; }
.section-heading h2 { margin: 0; font-size: clamp(1.75rem, 4vw, 2.1rem); line-height: 1.15; letter-spacing: -0.04em; }
.section-heading > p { max-width: 560px; margin: 0; color: var(--muted); font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; font-size: 14px; line-height: 1.75; }

.loop-flow { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.loop-flow span { padding: 8px 11px; border: 1px solid var(--line); border-radius: 7px; background: #0d1013; color: #dbe0e4; font-size: 12px; }
.loop-flow i { color: #56606a; font-style: normal; }

.capability-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.capability { min-height: 168px; padding: 25px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.capability .index { display: block; margin-bottom: 18px; color: #59616a; font-size: 11px; }
.capability h3 { margin: 0 0 9px; font-size: 14px; }
.capability p { margin: 0; color: var(--muted); font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; font-size: 13px; line-height: 1.7; }

.extension-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.extension-card { min-height: 225px; padding: 21px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel-strong); }
.extension-card h3 { margin: 0 0 10px; font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; font-size: 18px; letter-spacing: -0.02em; }
.extension-card p { margin: 0; color: var(--muted); font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; font-size: 13px; line-height: 1.75; }
.tag-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 16px; }
.tag-row span { padding: 4px 7px; border: 1px solid #293038; border-radius: 6px; color: #8c959f; font-size: 11px; }

.architecture-list { overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: #090b0d; }
.architecture-list > div { display: grid; grid-template-columns: 155px 1fr; border-bottom: 1px solid var(--line); }
.architecture-list > div:last-child { border-bottom: 0; }
.architecture-list b { padding: 14px; border-right: 1px solid var(--line); color: var(--green); font-size: 12px; font-weight: 500; }
.architecture-list span { padding: 14px; color: #a8b0b8; font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; font-size: 13px; }
.section-action { margin-top: 18px; font-size: 13px; }

.evaluation-grid { display: grid; grid-template-columns: 220px 1fr; gap: 28px; align-items: start; }
.harbor-box { padding: 22px; border: 1px solid var(--line); border-radius: 10px; background: #0b0e11; }
.harbor-box strong { display: block; font-family: Inter, ui-sans-serif, system-ui, sans-serif; font-size: 28px; line-height: 1.1; }
.harbor-box span { display: block; margin-top: 7px; color: var(--muted); font-size: 12px; }
.evaluation-copy p { margin: 0; color: var(--muted); font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; font-size: 14px; line-height: 1.75; }
.evaluation-flow { margin-top: 16px; color: #707a84; font-size: 12px; }
.evaluation-flow span { color: #dde2e7; }

.site-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 18px 28px; padding: 30px 0 44px; color: #59616a; font-size: 12px; }
.footer-links { display: inline-flex; gap: 14px; }
.footer-links a:hover { color: #dbe0e4; }

@media (max-width: 760px) {
  .top-nav { display: none; }
  .hero { padding-top: 72px; }
  .hero h1 { font-size: 3.2rem; }
  .hero-lead { font-size: 16px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .capability-grid, .extension-grid, .evaluation-grid { grid-template-columns: 1fr; }
  .architecture-list > div { grid-template-columns: 1fr; }
  .architecture-list b { border-right: 0; border-bottom: 1px solid var(--line); }
  .terminal-bar { align-items: flex-start; flex-direction: column; padding: 10px 14px; }
}

@media (max-width: 480px) {
  .shell { width: min(100% - 24px, 980px); }
  .hero-actions { gap: 10px 14px; }
  .terminal-body { padding: 16px; font-size: 12px; }
  .capability, .extension-card { padding: 20px; }
}