:root {
  --bg: #0a0b1a;
  --bg-2: #131635;
  --surface: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.10);
  --text: #eef0ff;
  --muted: #a5abd6;
  --cyan: #22d3ee;
  --violet: #8b5cf6;
  --pink: #f472b6;
  --brand: linear-gradient(90deg, var(--cyan), var(--violet) 55%, var(--pink));
  --radius: 18px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: radial-gradient(1200px 700px at 50% -10%, rgba(124, 58, 237, 0.35), transparent 70%), var(--bg);
  color: var(--text);
  font: 17px/1.7 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang TC", "Noto Sans TC", "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; height: auto; display: block; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* Header */
header.top { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(14px); background: rgba(10, 11, 26, 0.72); border-bottom: 1px solid var(--border); }
header.top .wrap { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; text-decoration: none; letter-spacing: .2px; }
.brand img { width: 32px; height: 32px; }
nav.links { display: flex; gap: 22px; margin-left: auto; font-size: 15px; }
nav.links a { text-decoration: none; color: var(--muted); }
nav.links a:hover { color: var(--text); }
.lang { font-size: 14px; padding: 4px 10px; border: 1px solid var(--border); border-radius: 999px; text-decoration: none; color: var(--muted); }

/* Hero */
.hero { text-align: center; padding: 88px 0 40px; }
.hero img.icon { width: 132px; height: 132px; margin: 0 auto 24px; filter: drop-shadow(0 18px 40px rgba(124, 58, 237, .45)); }
.hero h1 { font-size: clamp(38px, 6vw, 64px); line-height: 1.12; margin: 0 0 16px; letter-spacing: -.5px; }
.hero h1 .grad { background: var(--brand); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: clamp(18px, 2.2vw, 21px); color: var(--muted); max-width: 720px; margin: 0 auto 32px; }
.cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 24px; border-radius: 999px; font-weight: 600; text-decoration: none; font-size: 16px; }
.btn.primary { background: var(--brand); color: #0a0b1a; }
.btn.ghost { border: 1px solid var(--border); color: var(--text); background: var(--surface); }
.btn.soon { cursor: default; }
.note { margin-top: 14px; font-size: 14px; color: var(--muted); }

/* Format chips */
.formats { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 36px auto 0; max-width: 820px; }
.chip { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); font-size: 14px; color: var(--text); }

/* Shots */
.shot { margin: 56px auto 0; border-radius: 16px; overflow: hidden; border: 1px solid var(--border); box-shadow: 0 40px 100px rgba(0, 0, 0, .55); }

/* Sections */
section { padding: 84px 0 0; }
section h2 { font-size: clamp(28px, 4vw, 40px); margin: 0 0 12px; letter-spacing: -.3px; }
section p.sub { color: var(--muted); margin: 0 0 36px; max-width: 720px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.card h3 { margin: 0 0 8px; font-size: 19px; }
.card p { margin: 0; color: var(--muted); font-size: 15.5px; }
.card .ico { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 14px; background: linear-gradient(135deg, rgba(34, 211, 238, .25), rgba(244, 114, 182, .25)); font-size: 20px; }

.feature { display: grid; grid-template-columns: 1fr 1.25fr; gap: 44px; align-items: center; padding-top: 72px; }
.feature.flip { grid-template-columns: 1.25fr 1fr; }
.feature.flip .text { order: 2; }
.feature .tag { display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .6px; text-transform: uppercase; background: var(--brand); -webkit-background-clip: text; background-clip: text; color: transparent; margin-bottom: 8px; }
.feature h3 { font-size: clamp(24px, 3vw, 32px); margin: 0 0 12px; line-height: 1.3; }
.feature ul { margin: 0; padding-left: 20px; color: var(--muted); }
.feature li { margin: 4px 0; }
.feature .shot { margin: 0; }

/* Pricing */
.pricing { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.price { font-size: 34px; font-weight: 700; margin: 6px 0 12px; }
.price small { font-size: 15px; color: var(--muted); font-weight: 500; }
.card.highlight { border-color: rgba(139, 92, 246, .6); box-shadow: 0 0 0 1px rgba(139, 92, 246, .35), 0 20px 60px rgba(124, 58, 237, .25); }
.card ul { margin: 0; padding-left: 20px; color: var(--muted); font-size: 15.5px; }

/* Docs pages (support, privacy, source) */
.doc { max-width: 760px; padding-top: 56px; }
.doc h1 { font-size: clamp(30px, 4.5vw, 42px); margin: 0 0 8px; }
.doc h2 { font-size: 22px; margin: 40px 0 8px; }
.doc h3 { font-size: 17px; margin: 22px 0 4px; }
.doc p, .doc li { color: var(--muted); }
.doc .contact { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 16px 20px; color: var(--text); }
.doc a { color: #c4b5fd; }
.doc code { background: var(--surface); padding: 2px 6px; border-radius: 6px; font-size: 14px; }

/* Footer */
footer { margin-top: 96px; border-top: 1px solid var(--border); padding: 32px 0 48px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 18px 28px; align-items: center; }
footer a { text-decoration: none; }
footer a:hover { color: var(--text); }
footer .copy { margin-left: auto; }

@media (max-width: 860px) {
  .grid, .pricing { grid-template-columns: 1fr; }
  .feature, .feature.flip { grid-template-columns: 1fr; gap: 24px; }
  .feature.flip .text { order: 0; }
  nav.links { display: none; }
  .hero { padding-top: 56px; }
  footer .copy { margin-left: 0; }
}
.muted { color: var(--muted); }