:root {
  --bg: #060a14;
  --panel: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.12);
  --text: #eef2ff;
  --muted: #9aa8c7;
  --accent: #6b9bff;
  --accent2: #8b5cff;
  --ok: #5ee9a8;
  --warn: #ffc878;
  --font: "Segoe UI", system-ui, "PingFang TC", "Microsoft JhengHei", sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; color: var(--text); font-family: var(--font); background: var(--bg); scroll-behavior: smooth; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.bg {
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(ellipse 90% 60% at 15% -5%, rgba(79, 140, 255, 0.22), transparent 55%),
    radial-gradient(ellipse 70% 50% at 95% 10%, rgba(139, 92, 255, 0.14), transparent 50%),
    radial-gradient(ellipse 50% 40% at 50% 100%, rgba(67, 211, 158, 0.06), transparent),
    var(--bg);
}
.glass {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  backdrop-filter: blur(16px);
}
.top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px 24px; position: sticky; top: 0; z-index: 10;
  background: rgba(6, 10, 20, 0.82); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 1.1rem; text-decoration: none; }
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 18px; flex-wrap: wrap; }
.nav a { color: var(--muted); font-size: 0.92rem; }
.nav a:hover { color: var(--text); text-decoration: none; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 24px; border-radius: 12px; font-weight: 600; font-size: 0.95rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff; border: none; text-decoration: none;
  box-shadow: 0 12px 32px rgba(79, 140, 255, 0.25);
  transition: transform 0.15s, filter 0.15s;
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.06); text-decoration: none; }
.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); box-shadow: none; }
.btn.sm { padding: 10px 16px; font-size: 0.88rem; }

.hero {
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 40px; align-items: center;
  max-width: 1140px; margin: 0 auto; padding: 72px 24px 48px;
}
.eyebrow { color: var(--muted); font-size: 0.82rem; letter-spacing: 0.06em; text-transform: uppercase; margin: 0 0 8px; }
.hero h1 { font-size: clamp(2.1rem, 5.5vw, 3.2rem); line-height: 1.12; margin: 0 0 16px; letter-spacing: -0.02em; }
.grad { background: linear-gradient(135deg, #a8c8ff, #c4b5fd, #7ee8b8); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { color: var(--muted); font-size: 1.08rem; line-height: 1.75; max-width: 560px; margin: 0; }
.cta-row { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.cta-row.center { justify-content: center; }
.live-bar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin-top: 24px; padding: 12px 16px; font-size: 0.85rem;
}
.live-pill { padding: 4px 10px; border-radius: 999px; font-size: 0.78rem; font-weight: 600; }
.live-pill.ok { background: rgba(94, 233, 168, 0.12); color: var(--ok); border: 1px solid rgba(94, 233, 168, 0.3); }
.live-pill.warn { background: rgba(255, 200, 120, 0.12); color: var(--warn); border: 1px solid rgba(255, 200, 120, 0.3); }
.live-meta { color: var(--muted); font-size: 0.78rem; margin-left: auto; }

.hero-visual { padding: 28px; text-align: center; }
.layer-stack { display: grid; gap: 10px; margin-bottom: 16px; }
.layer {
  padding: 14px 18px; border-radius: 12px; text-align: left;
  border: 1px solid var(--border); background: rgba(255,255,255,0.03);
  font-size: 0.92rem;
}
.layer span { display: inline-block; min-width: 28px; font-weight: 800; color: var(--accent); margin-right: 8px; }
.layer.l0 { border-color: rgba(107,155,255,0.35); }
.layer.l1 { margin-left: 12px; }
.layer.l2 { margin-left: 24px; }
.layer.l3 { margin-left: 36px; border-color: rgba(94,233,168,0.25); }

.stats-band { border-y: 1px solid var(--border); background: rgba(255,255,255,0.02); }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  max-width: 1140px; margin: 0 auto; padding: 0 24px;
}
.stat { padding: 28px 16px; text-align: center; }
.stat-num { display: block; font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; letter-spacing: -0.03em; }
.stat-label { display: block; color: var(--muted); font-size: 0.85rem; margin-top: 6px; }

.section { max-width: 1140px; margin: 0 auto; padding: 56px 24px; }
.section-tag { color: var(--accent); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; margin: 0 0 8px; }
.section h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin: 0 0 12px; line-height: 1.25; }
.section-lead { color: var(--muted); max-width: 680px; line-height: 1.7; margin: 0 0 8px; }
.center { text-align: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 24px; }
.card { padding: 24px; }
.feat .ic { font-size: 34px; color: var(--accent); }
.feat h3 { margin: 14px 0 8px; font-size: 1.05rem; }
.feat p { color: var(--muted); line-height: 1.65; font-size: 0.92rem; margin: 0; }

.flow-steps {
  display: flex; align-items: stretch; gap: 8px; flex-wrap: wrap;
  padding: 24px; margin-top: 24px;
}
.flow-step {
  flex: 1; min-width: 140px; display: flex; gap: 12px; align-items: flex-start;
}
.flow-step span {
  width: 32px; height: 32px; border-radius: 50%; flex-shrink: 0;
  display: grid; place-items: center; font-weight: 800; font-size: 0.85rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff;
}
.flow-arrow { align-self: center; color: var(--muted); font-size: 1.2rem; padding: 0 4px; }

.arch { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding: 24px; margin-top: 24px; }
.arch-col h4 { margin: 0 0 12px; font-size: 1rem; }
.arch-col.highlight { border: 1px solid rgba(107,155,255,0.35); border-radius: 14px; padding: 16px; background: rgba(107,155,255,0.06); }
.arch-list { margin: 0; padding-left: 18px; color: var(--muted); font-size: 0.9rem; line-height: 1.7; }

.compare-table { padding: 0; overflow: hidden; margin-top: 24px; }
.compare-head, .compare-row {
  display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 12px;
  padding: 14px 20px; border-bottom: 1px solid var(--border); align-items: center;
}
.compare-head { font-weight: 700; font-size: 0.88rem; color: var(--muted); background: rgba(255,255,255,0.03); }
.compare-row { font-size: 0.92rem; }
.compare-row span:first-child { color: var(--muted); }
.accent-col { color: var(--ok); font-weight: 600; }

.tier .tag {
  display: inline-block; padding: 4px 10px; border-radius: 999px;
  background: rgba(107, 155, 255, 0.15); font-size: 0.72rem; font-weight: 800;
}
.tier h3 { margin: 12px 0 8px; }
.tier p { color: var(--muted); font-size: 0.9rem; line-height: 1.55; margin: 0; min-height: 2.8em; }
.tier a { font-size: 0.88rem; margin-top: 14px; display: inline-block; font-weight: 600; }

.cta-band { text-align: center; padding: 48px 32px; margin: 0 24px 48px; max-width: calc(1140px - 48px); margin-left: auto; margin-right: auto; }
.cta-band h2 { margin: 0 0 10px; }
.cta-band p { color: var(--muted); margin: 0 0 20px; }

.site-foot {
  border-top: 1px solid var(--border);
  padding: 32px 24px 40px;
  background: rgba(0,0,0,0.25);
}
.foot-grid {
  max-width: 1140px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.muted { color: var(--muted); }
.tiny { font-size: 0.8rem; }

@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; padding-top: 48px; }
  .hero-visual { order: -1; }
  .grid-3, .grid-4, .arch { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-arrow { display: none; }
  .flow-steps { flex-direction: column; }
  .nav { display: none; }
  .foot-grid { grid-template-columns: 1fr; text-align: center; }
  .compare-head, .compare-row { grid-template-columns: 1fr; gap: 4px; }
  .compare-head span:not(:first-child), .compare-row span:not(:first-child) { padding-left: 12px; }
}