:root {
  --color-primary: #171717;
  --color-on-primary: #ffffff;
  --color-ink: #171717;
  --color-body: #4d4d4d;
  --color-mute: #888888;
  --color-hairline: #ebebeb;
  --color-hairline-strong: #a1a1a1;
  --color-canvas: #ffffff;
  --color-canvas-soft: #fafafa;
  --color-canvas-soft-2: #f5f5f5;
  --color-link: #0070f3;
  --color-cyan: #50e3c2;
  --color-violet: #7928ca;
  --color-highlight-pink: #ff0080;
  --color-gradient-develop-start: #007cf0;
  --color-gradient-develop-end: #00dfd8;
  --color-gradient-preview-start: #7928ca;
  --color-gradient-preview-end: #ff0080;
  --color-gradient-ship-start: #ff4d4d;
  --color-gradient-ship-end: #f9cb28;
  --rounded-none: 0px;
  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-xl: 16px;
  --rounded-pill-sm: 64px;
  --rounded-pill: 100px;
  --rounded-full: 9999px;
  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-4xl: 64px;
  --space-5xl: 96px;
  --font: Geist, Inter, system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", monospace;
  --shadow-card: 0 0 0 1px #00000014 inset, 0px 2px 2px #0000000a, 0px 8px 8px -8px #0000000a;
  --shadow-float: 0 0 0 1px #00000014 inset, 0px 2px 2px #0000000a, 0px 8px 16px -4px #0000000a;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: var(--font);
  color: var(--color-ink);
  background: var(--color-canvas-soft);
  font-size: 16px;
  font-weight: 400;
  line-height: 24px;
}
a { color: var(--color-link); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.header {
  background: var(--color-canvas);
  height: 64px;
  border-bottom: 1px solid var(--color-hairline);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 64px;
  flex-wrap: wrap;
}
.logo {
  font-weight: 600;
  color: var(--color-ink);
  font-size: 16px;
  letter-spacing: -0.4px;
}
.nav { display: flex; flex-wrap: wrap; gap: 4px; flex: 1; }
.nav a {
  color: var(--color-body);
  font-size: 14px;
  padding: 8px 12px;
  border-radius: var(--rounded-full);
}
.nav a.on { color: var(--color-ink); background: var(--color-canvas-soft-2); }
.back { margin-left: auto; font-size: 13px; color: var(--color-mute); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 8px;
  background: var(--color-primary);
  color: var(--color-on-primary);
  border-radius: var(--rounded-sm);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}
.nav-cta:hover { color: var(--color-on-primary); text-decoration: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 16px;
  background: var(--color-primary);
  color: var(--color-on-primary);
  border: 0;
  border-radius: var(--rounded-pill);
  font-family: inherit;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { color: var(--color-on-primary); text-decoration: none; opacity: 0.9; }
.btn-secondary {
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: 0 0 0 1px var(--color-hairline);
}

.hero {
  padding: 96px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: var(--color-canvas);
}
.hero::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -20%;
  width: 920px;
  height: 420px;
  transform: translateX(-50%);
  background:
    radial-gradient(closest-side at 22% 48%, var(--color-gradient-develop-start), transparent 70%),
    radial-gradient(closest-side at 48% 38%, var(--color-gradient-develop-end), transparent 68%),
    radial-gradient(closest-side at 62% 55%, var(--color-gradient-preview-start), transparent 70%),
    radial-gradient(closest-side at 78% 42%, var(--color-gradient-preview-end), transparent 68%),
    radial-gradient(closest-side at 40% 70%, var(--color-gradient-ship-start), transparent 72%),
    radial-gradient(closest-side at 58% 78%, var(--color-gradient-ship-end), transparent 70%);
  filter: blur(8px);
  opacity: 0.85;
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 1; }
.badge {
  display: inline-flex;
  background: var(--color-canvas-soft);
  color: var(--color-body);
  border-radius: var(--rounded-full);
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: 48px;
  font-weight: 600;
  line-height: 48px;
  letter-spacing: -2.4px;
  margin: 0 0 16px;
}
.hero p {
  margin: 0 auto 24px;
  color: var(--color-body);
  max-width: 36em;
  font-size: 18px;
  line-height: 28px;
}
.hero-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

.section { padding: 64px 0; }
.section.dark {
  background: var(--color-primary);
  color: var(--color-on-primary);
}
.section.dark a { color: var(--color-on-primary); }
.section h2 {
  font-size: 32px;
  font-weight: 600;
  line-height: 40px;
  letter-spacing: -1.28px;
  margin: 0 0 24px;
}
.mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-mute);
  margin: 0 0 8px;
}
.muted { color: var(--color-body); }

.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.tab-ghost {
  background: var(--color-canvas);
  color: var(--color-ink);
  border-radius: var(--rounded-pill-sm);
  padding: 8px 16px;
  font-size: 14px;
  box-shadow: 0 0 0 1px var(--color-hairline);
}

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.card {
  background: var(--color-canvas);
  border-radius: var(--rounded-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}
.card h3 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.6px;
}
.card p { margin: 0; color: var(--color-body); font-size: 14px; }
.card.featured {
  background: var(--color-primary);
  color: var(--color-on-primary);
}
.card.featured p { color: #d0d0d0; }
.code {
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 20px;
  border-radius: var(--rounded-md);
  padding: 24px;
}

.list { list-style: none; margin: 0; padding: 0; }
.list li {
  border-bottom: 1px solid var(--color-hairline);
  padding: 12px 0;
  display: flex;
  gap: 16px;
}
.list .date { font-family: var(--font-mono); font-size: 12px; color: var(--color-mute); min-width: 96px; }

.ph {
  background: var(--color-canvas-soft-2);
  color: var(--color-mute);
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  margin-bottom: 12px;
  border-radius: var(--rounded-md);
}

form label { display: block; margin: 0 0 4px; font-size: 14px; }
form input, form textarea {
  width: 100%;
  max-width: 480px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-sm);
  font: inherit;
  background: var(--color-canvas);
  margin-bottom: 12px;
}
form textarea { height: auto; padding: 12px; }

.footer {
  background: var(--color-canvas);
  color: var(--color-body);
  font-size: 14px;
  padding: 64px 0;
  border-top: 1px solid var(--color-hairline);
}
.footer p { margin: 0 0 4px; }
.footer .mono { color: var(--color-mute); }

@media (max-width: 800px) {
  .hero h1 { font-size: 32px; line-height: 36px; letter-spacing: -1.28px; }
  .grid, .grid-2 { grid-template-columns: 1fr; }
}

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