:root {
  color-scheme: dark;
  --bg: #090909;
  --panel: #111;
  --ink: #f4f4ef;
  --muted: #a4a4a0;
  --line: #2a2a27;
  --accent: #d9ff67;
  --danger: #ff786e;
  --code: #0d1218;
  font-family:
    Inter, 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', ui-sans-serif, system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 75% 0%, rgb(217 255 103 / 8%), transparent 34rem), var(--bg);
  color: var(--ink);
  line-height: 1.75;
}

a {
  color: inherit;
  text-decoration-color: rgb(217 255 103 / 55%);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent);
}

.wrap {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

nav,
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

nav .brand {
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--muted);
  font-size: 0.94rem;
}

header,
section {
  padding: clamp(56px, 9vw, 104px) 0;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.12;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 900px;
  margin-top: 18px;
  font-size: clamp(3rem, 10vw, 7.5rem);
}

h2 {
  margin: 12px 0 22px;
  font-size: clamp(2rem, 5vw, 4rem);
}

h3 {
  margin-bottom: 12px;
  font-size: 1.25rem;
}

p,
li {
  max-width: 76ch;
}

.lede {
  max-width: 720px;
  margin: 26px 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
}

.muted {
  color: var(--muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 9px;
  text-decoration: none;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #101408;
  font-weight: 800;
}

.hero-image,
.demo-image {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 34px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
}

.grid,
.comparison {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.comparison {
  grid-template-columns: repeat(2, 1fr);
}

.card,
.comparison > div,
details {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}

.tag {
  display: inline-block;
  margin-bottom: 22px;
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.82rem;
}

pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--code);
  color: #e8eef5;
  line-height: 1.55;
}

code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}

p code,
li code {
  padding: 0.1em 0.35em;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--code);
}

.fail {
  color: var(--danger);
  font-weight: 800;
}

.faq {
  display: grid;
  gap: 12px;
}

details summary {
  cursor: pointer;
  font-weight: 750;
}

details p {
  margin-bottom: 0;
  color: var(--muted);
}

.prose {
  width: min(820px, 100%);
}

.prose h1 {
  font-size: clamp(2.5rem, 7vw, 5rem);
}

.prose h2 {
  margin-top: 52px;
  font-size: clamp(1.55rem, 4vw, 2.4rem);
}

.prose blockquote {
  margin: 28px 0;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

footer {
  border-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 760px) {
  nav,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .grid,
  .comparison {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}