:root {
  --color-primary: #00ed64;
  --color-primary-deep: #00b545;
  --color-primary-pressed: #008c34;
  --color-on-primary: #001e2b;
  --color-brand-green: #00ed64;
  --color-brand-green-dark: #00684a;
  --color-brand-green-mid: #00a35c;
  --color-brand-green-soft: #c3f0d2;
  --color-brand-teal-deep: #001e2b;
  --color-brand-teal: #003d4f;
  --color-brand-teal-mid: #00684a;
  --color-accent-purple: #7b3ff2;
  --color-accent-orange: #fa6e39;
  --color-accent-pink: #f06bb8;
  --color-accent-blue: #3d4f9f;
  --color-canvas: #ffffff;
  --color-canvas-dark: #001e2b;
  --color-surface: #f9fbfa;
  --color-surface-feature: #e3fcef;
  --color-hairline: #e1e5e8;
  --color-hairline-soft: #eceff1;
  --color-hairline-strong: #c1ccd6;
  --color-hairline-dark: #1c2d38;
  --color-ink: #001e2b;
  --color-charcoal: #1c2d38;
  --color-slate: #3d4f5b;
  --color-steel: #5c6c7a;
  --color-stone: #7c8c9a;
  --color-muted: #a8b3bc;
  --color-on-dark: #ffffff;
  --color-on-dark-muted: #a8b3bc;
  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-xl: 16px;
  --rounded-xxl: 24px;
  --rounded-full: 9999px;
  --font: "Euclid Circular A", system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Source Code Pro", ui-monospace, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-ink);
  background: var(--color-canvas);
  font-size: 16px;
  line-height: 1.55;
}
a { color: var(--color-brand-green-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1280px; margin: 0 auto; padding: 0 32px; }

.promo {
  background: var(--color-brand-teal-deep);
  color: var(--color-on-dark);
  text-align: center;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 500;
}
.promo a { color: var(--color-brand-green); }

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 64px;
  flex-wrap: wrap;
}
.logo {
  font-weight: 600;
  color: var(--color-ink);
  font-size: 18px;
}
.logo span { color: var(--color-brand-green); }
.logo:hover { text-decoration: none; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 20px; flex: 1; }
.nav a { color: var(--color-ink); font-size: 14px; font-weight: 500; }
.nav a.on { color: var(--color-brand-green-dark); }
.back { margin-left: auto; font-size: 13px; color: var(--color-steel); }

.hero {
  background: var(--color-brand-teal-deep);
  color: var(--color-on-dark);
  padding: 120px 0 96px;
  text-align: center;
}
.hero h1 {
  font-size: 72px;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin: 0 0 16px;
  color: var(--color-on-dark);
}
.hero p {
  margin: 0 auto 28px;
  color: var(--color-on-dark-muted);
  font-size: 18px;
  max-width: 40em;
}
.hero-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-bottom: 40px; }

.code-card {
  background: var(--color-canvas-dark);
  color: var(--color-on-dark);
  border: 1px solid var(--color-hairline-dark);
  border-radius: var(--rounded-lg);
  padding: 20px;
  text-align: left;
  max-width: 720px;
  margin: 0 auto;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.55;
  box-shadow: rgba(0, 30, 43, 0.12) 0px 12px 24px -4px;
}
.code-card .g { color: var(--color-brand-green); }

.btn, form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-brand-green);
  color: var(--color-on-primary);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 22px;
  border: 0;
  border-radius: var(--rounded-full);
  cursor: pointer;
}
.btn:hover, form button:hover { text-decoration: none; background: var(--color-primary-pressed); color: var(--color-on-primary); }
.btn-secondary {
  background: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-hairline-strong);
}
.btn-secondary:hover { background: var(--color-surface); color: var(--color-ink); }
.btn-ghost-dark {
  background: transparent;
  color: var(--color-on-dark);
  border: 1px solid var(--color-hairline-dark);
}
.btn-ghost-dark:hover { background: var(--color-brand-teal); color: #fff; }

.section { padding: 96px 0; }
.section h2 {
  font-size: 36px;
  font-weight: 500;
  letter-spacing: -0.5px;
  line-height: 1.25;
  margin: 0 0 32px;
}
.muted { color: var(--color-slate); max-width: 46em; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

.card {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-lg);
  padding: 32px;
}
.card h3 { margin: 0 0 8px; font-size: 22px; font-weight: 500; }
.card p { margin: 0; color: var(--color-slate); font-size: 14px; }
.card.featured {
  background: var(--color-surface-feature);
  border: 2px solid var(--color-brand-green);
}
.card.dark {
  background: var(--color-brand-teal-deep);
  color: #fff;
  border: 0;
}
.card.dark h3, .card.dark p { color: #fff; }
.card.stat h3 { font-size: 36px; }
.why { background: var(--color-surface); border: 0; }

.badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--rounded-sm);
  color: #fff;
  margin-bottom: 8px;
}
.b-green { background: var(--color-brand-green); color: var(--color-on-primary); }
.b-purple { background: var(--color-accent-purple); }
.b-orange { background: var(--color-accent-orange); }
.b-pop {
  background: var(--color-brand-teal-deep);
  color: var(--color-brand-green);
  border-radius: var(--rounded-full);
  padding: 4px 10px;
}

.cta-dark {
  background: var(--color-brand-teal-deep);
  color: #fff;
  border-radius: var(--rounded-lg);
  padding: 64px;
  text-align: center;
}
.cta-dark h2 { color: #fff; margin: 0 0 12px; }

.ph {
  background: var(--color-surface);
  color: var(--color-stone);
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  margin-bottom: 12px;
  border-radius: var(--rounded-md);
}

.list { list-style: none; margin: 0; padding: 0; }
.list li { border-bottom: 1px solid var(--color-hairline-soft); padding: 16px 0; font-weight: 500; }
.list .date { color: var(--color-steel); font-size: 13px; font-weight: 400; margin-right: 12px; }

form label { display: block; margin: 0 0 4px; font-size: 14px; font-weight: 500; }
form input, form textarea {
  width: 100%;
  max-width: 480px;
  height: 44px;
  padding: 12px 16px;
  border: 1px solid var(--color-hairline-strong);
  background: var(--color-canvas);
  color: var(--color-ink);
  font: inherit;
  margin-bottom: 12px;
  border-radius: var(--rounded-md);
}
form textarea { height: auto; min-height: 110px; }
form input:focus, form textarea:focus {
  outline: none;
  border: 2px solid var(--color-brand-green-dark);
}

.footer {
  background: var(--color-brand-teal-deep);
  color: var(--color-on-dark);
  padding: 64px 0 40px;
  font-size: 14px;
}
.footer-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 24px; }
.footer h4 { margin: 0 0 12px; font-size: 14px; font-weight: 500; }
.footer a { color: var(--color-on-dark-muted); display: block; padding: 4px 0; }

@media (max-width: 1024px) {
  .hero h1 { font-size: 48px; }
  .grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
}
@media (max-width: 720px) {
  .wrap { padding: 0 16px; }
  .hero h1 { font-size: 36px; }
  .grid, .grid-2, .grid-4, .footer-grid { grid-template-columns: 1fr; }
  .cta-dark { padding: 32px; }
}

.ph { overflow: hidden; }
.ph img { width: 100%; height: 100%; object-fit: cover; display: block; }