/* AI Flow product detail — quiet premium, diagram-first (shared) */
:root {
  --af-accent: #3b82f6;
  --af-violet: #7c6bf0;
  --af-cyan: #22d3ee;
  --af-ink: #0f172a;
  --af-muted: #64748b;
  --af-faint: rgba(15, 23, 42, 0.08);
  --af-border: rgba(15, 23, 42, 0.1);
  --af-border-strong: rgba(15, 23, 42, 0.16);
  --af-surface: rgba(15, 23, 42, 0.028);
  --af-card: #ffffff;
  --af-bg: #f7f8fc;
  --af-code-bg: #0b1220;
  --af-code-fg: #e2e8f0;
  --af-lift: 0 1px 2px rgba(15, 23, 42, 0.05), 0 10px 28px rgba(15, 23, 42, 0.045);
  --af-lift-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 14px rgba(15, 23, 42, 0.035);
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--af-ink);
  background:
    radial-gradient(ellipse 70% 45% at 12% -8%, color-mix(in srgb, var(--af-violet) 16%, transparent), transparent 62%),
    radial-gradient(ellipse 55% 40% at 92% 0%, color-mix(in srgb, var(--af-accent) 12%, transparent), transparent 58%),
    radial-gradient(ellipse 40% 30% at 70% 100%, color-mix(in srgb, var(--af-cyan) 8%, transparent), transparent 55%),
    var(--af-bg);
  line-height: 1.6;
  min-height: 100vh;
}
a { color: var(--af-accent); text-decoration: none; }
a:hover { opacity: 0.88; }

.page {
  position: relative;
  max-width: 80rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 4.5rem;
}
@media (min-width: 768px) {
  .page { padding: 2.5rem 1.75rem 5.5rem; }
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2.25rem;
}
.topbar .home-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  color: var(--af-muted);
  font-weight: 500;
}
.topbar .home-link:hover { color: var(--af-ink); opacity: 1; }
.topbar .nav-mini {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.1rem;
  font-size: 0.8rem;
  color: var(--af-muted);
}
.topbar .nav-mini a { color: inherit; }
.topbar .nav-mini a:hover { color: var(--af-violet); opacity: 1; }
.topbar .nav-mini a.is-active { color: var(--af-ink); font-weight: 600; }

.hero {
  position: relative;
  margin-bottom: 2.5rem;
  padding: 0 0 2.1rem;
  max-width: 46rem;
}
.hero::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 4.5rem; height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--af-violet), var(--af-accent), transparent);
  opacity: 0.85;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.95rem;
  margin-bottom: 1.05rem;
}
.brand img {
  width: 44px; height: 44px;
  border-radius: 12px;
  box-shadow: var(--af-lift-sm);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.55rem;
  padding: 0.28rem 0.72rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--af-violet) 28%, var(--af-border));
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--af-violet) 10%, transparent),
    color-mix(in srgb, var(--af-accent) 6%, transparent));
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--af-muted);
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--af-violet);
  box-shadow: 0 0 12px color-mix(in srgb, var(--af-violet) 70%, transparent);
}
.hero h1 {
  margin: 0;
  font-size: clamp(1.85rem, 3.4vw, 2.55rem);
  font-weight: 720;
  line-height: 1.12;
  letter-spacing: -0.035em;
}
.lead {
  margin: 1rem 0 0;
  font-size: 0.98rem;
  color: var(--af-muted);
  line-height: 1.65;
  max-width: 38rem;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.35rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.62rem 1.15rem;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: opacity 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.btn.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--af-violet), var(--af-accent));
  box-shadow: 0 8px 22px color-mix(in srgb, var(--af-violet) 28%, transparent);
}
.btn.primary:hover { opacity: 1; transform: translateY(-1px); }
.btn.ghost {
  color: var(--af-ink);
  background: color-mix(in srgb, #fff 86%, transparent);
  border-color: var(--af-border);
  backdrop-filter: blur(8px);
}
.btn.ghost:hover { border-color: color-mix(in srgb, var(--af-violet) 30%, var(--af-border)); opacity: 1; }

.block { margin: 0 0 1.85rem; }
.block-head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin: 0 0 1.05rem;
}
.block-head h2 {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--af-muted);
  white-space: nowrap;
}
.block-head .rule {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--af-border-strong), transparent);
}

.panel {
  padding: 1.25rem 1.3rem 1.35rem;
  border-radius: 1.15rem;
  border: 1px solid var(--af-border);
  background:
    linear-gradient(180deg, color-mix(in srgb, #fff 94%, transparent), var(--af-card)),
    var(--af-surface);
  box-shadow: var(--af-lift);
}
.panel p { margin: 0 0 0.75rem; color: var(--af-muted); font-size: 0.9rem; }
.panel p:last-child { margin-bottom: 0; }
.panel strong { color: var(--af-ink); font-weight: 650; }

/* Scene / capability diagram cards */
.scene-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.95rem;
}
@media (min-width: 720px) {
  .scene-grid { grid-template-columns: 1fr 1fr; }
}
.scene-card {
  display: flex;
  flex-direction: column;
  border-radius: 1.15rem;
  border: 1px solid var(--af-border);
  background:
    linear-gradient(160deg,
      color-mix(in srgb, var(--af-violet) 5%, #fff),
      #fff 48%,
      color-mix(in srgb, var(--af-accent) 4%, #fff));
  box-shadow: var(--af-lift-sm);
  overflow: hidden;
  min-height: 100%;
}
.scene-viz {
  position: relative;
  aspect-ratio: 16 / 9;
  min-height: 180px;
  max-height: 240px;
  padding: 0;
  overflow: hidden;
  background:
    linear-gradient(180deg, #0b1220 0%, #111827 100%);
  border-bottom: 1px solid var(--af-border);
}
.scene-viz::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, transparent 55%, rgba(15, 23, 42, 0.18) 100%),
    radial-gradient(ellipse 90% 70% at 50% 0%, transparent 40%, rgba(15, 23, 42, 0.12) 100%);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.06);
}
.scene-viz img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}
.scene-card:hover .scene-viz img {
  transform: scale(1.02);
}
.scene-viz img {
  transition: transform 0.45s ease;
}
.scene-body { padding: 1rem 1.15rem 1.2rem; }
.scene-body h3 {
  margin: 0 0 0.4rem;
  font-size: 1.02rem;
  font-weight: 680;
  letter-spacing: -0.02em;
}
.scene-body p {
  margin: 0;
  font-size: 0.84rem;
  color: var(--af-muted);
  line-height: 1.55;
}

/* Compare strip */
.compare {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}
@media (min-width: 800px) {
  .compare { grid-template-columns: 1fr 1fr; }
}
.compare-col {
  position: relative;
  padding: 1.35rem 1.25rem 1.35rem;
  border-radius: 1.15rem;
  border: 1px solid var(--af-border);
  background:
    linear-gradient(180deg, #fbfcff 0%, var(--af-card) 40%);
  box-shadow: var(--af-lift-sm);
}
.compare-col::before {
  content: "";
  display: block;
  height: 10px;
  margin: -0.55rem -0.55rem 0.95rem;
  border-radius: 0.55rem 0.55rem 0 0;
  background:
    linear-gradient(180deg, #eef1f8, #e6eaf3);
  border-bottom: 1px solid var(--af-border);
  box-shadow:
    inset 12px 0 0 -7px #f87171,
    inset 28px 0 0 -7px #fbbf24,
    inset 44px 0 0 -7px #34d399;
}
.compare-col.ent {
  border-color: color-mix(in srgb, var(--af-violet) 28%, var(--af-border));
  background:
    linear-gradient(145deg,
      color-mix(in srgb, var(--af-violet) 7%, #fff),
      #fff 55%);
}
.compare-col .tag {
  display: inline-flex;
  margin-bottom: 0.65rem;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  font-size: 0.65rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--af-muted);
  background: var(--af-surface);
  border: 1px solid var(--af-border);
}
.compare-col.ent .tag {
  color: var(--af-violet);
  background: color-mix(in srgb, var(--af-violet) 10%, transparent);
  border-color: color-mix(in srgb, var(--af-violet) 22%, transparent);
}
.compare-col h3 {
  margin: 0 0 0.75rem;
  font-size: 1.02rem;
  font-weight: 680;
  letter-spacing: -0.02em;
}
.compare-col ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.compare-col li {
  position: relative;
  padding: 0.35rem 0 0.35rem 1.15rem;
  font-size: 0.86rem;
  color: var(--af-muted);
  line-height: 1.45;
}
.compare-col li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.72rem;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--af-muted) 55%, transparent);
}
.compare-col.ent li::before { background: var(--af-violet); }

/* KV chips */
.kv {
  display: grid;
  gap: 0.65rem;
  margin: 0.85rem 0 0;
}
@media (min-width: 640px) {
  .kv { grid-template-columns: repeat(3, 1fr); }
}
.kv > div {
  padding: 0.85rem 0.95rem;
  border-radius: 0.85rem;
  border: 1px solid var(--af-border);
  background: var(--af-surface);
}
.kv .k {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--af-muted);
}
.kv code, .panel code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  color: var(--af-ink);
  word-break: break-all;
}

.official-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  padding: 1.1rem 1.25rem;
  border-radius: 1.1rem;
  border: 1px solid var(--af-border);
  background:
    linear-gradient(145deg,
      color-mix(in srgb, var(--af-violet) 5%, #fff),
      #fff);
  box-shadow: var(--af-lift-sm);
}
.official-row .label {
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--af-muted);
}
.official-row a.go {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.92rem;
  font-weight: 650;
  color: var(--af-violet);
}
.official-row a.go::after { content: "→"; transition: transform 0.15s ease; }
.official-row a.go:hover::after { transform: translateX(3px); }
.official-row .hint {
  margin: 0;
  flex: 1 1 12rem;
  font-size: 0.82rem;
  color: var(--af-muted);
}

.product-nav {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}
@media (min-width: 800px) {
  .product-nav { grid-template-columns: repeat(3, 1fr); }
}
.product-nav a {
  display: block;
  padding: 1rem 1.1rem;
  border-radius: 1rem;
  border: 1px solid var(--af-border);
  background: var(--af-card);
  box-shadow: var(--af-lift-sm);
  color: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.product-nav a:hover {
  border-color: color-mix(in srgb, var(--af-violet) 32%, var(--af-border));
  box-shadow: var(--af-lift);
  opacity: 1;
}
.product-nav a.is-here {
  border-color: color-mix(in srgb, var(--af-violet) 35%, var(--af-border));
  background: linear-gradient(145deg, color-mix(in srgb, var(--af-violet) 6%, #fff), #fff);
  pointer-events: none;
}
.product-nav .k {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.65rem;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--af-muted);
}
.product-nav .t {
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: -0.015em;
}

.faq details {
  border: 1px solid var(--af-border);
  border-radius: 0.9rem;
  background: var(--af-surface);
  margin: 0 0 0.55rem;
  padding: 0.15rem 0;
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 0.85rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--af-ink);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  margin-right: 0.65rem;
  border-radius: 50%;
  background: var(--af-violet);
  opacity: 0.7;
  vertical-align: middle;
}
.faq details[open] summary { padding-bottom: 0.35rem; }
.faq details p {
  margin: 0;
  padding: 0 1rem 0.95rem 1.85rem;
  font-size: 0.86rem;
  color: var(--af-muted);
}

.note {
  margin: 0.85rem 0 0;
  padding: 0.75rem 0.95rem;
  border-radius: 0.75rem;
  border: 1px solid color-mix(in srgb, var(--af-violet) 18%, var(--af-border));
  background: color-mix(in srgb, var(--af-violet) 5%, transparent);
  font-size: 0.84rem;
  color: var(--af-muted);
}

.foot {
  margin-top: 3rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--af-border);
  display: flex;
  justify-content: center;
  text-align: center;
  font-size: 0.78rem;
  color: var(--af-muted);
}
.foot .af-line {
  margin: 0;
  white-space: nowrap;
  overflow-x: auto;
  max-width: 100%;
}
.foot a { color: inherit; }
.foot a:hover { color: var(--af-accent); opacity: 1; }
.foot .icp {
  border-bottom: 1px solid color-mix(in srgb, currentColor 25%, transparent);
}

@media (max-width: 640px) {
  .lead { font-size: 0.92rem; }
  .topbar { flex-direction: column; align-items: flex-start; }
  .scene-viz { min-height: 150px; max-height: 190px; }
}