/* 聚奇点 — brand site */
:root {
  --night-ink: #101018;
  --shadow-purple: #21172e;
  --royal-violet: #6d3dff;
  --moon-lilac: #bba7ff;
  --jade-glow: #3fe0b5;
  --deep-jade: #128c74;
  --soft-gold: #d8b45a;
  --moon-silver: #e7e3f3;
  --card-smoke: #1a1b25;
  --panel-dark: #151720;
  --muted: #a9a3b8;
  --border-violet: #3a2d57;
  --radius-lg: 22px;
  --radius-md: 14px;
  --max-width: 1180px;
  --font-display: "Cormorant Garamond", "Georgia", serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--moon-silver);
  background: var(--night-ink);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--jade-glow);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--moon-lilac);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.6em;
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(2.6rem, 6vw, 4.2rem); }
h2 { font-size: clamp(2rem, 4vw, 2.75rem); }
h3 { font-size: 1.35rem; }

p { margin: 0 0 1rem; color: var(--muted); }

.lead {
  font-size: 1.2rem;
  color: var(--moon-silver);
  max-width: 38rem;
}

.container {
  width: min(100% - 2.5rem, var(--max-width));
  margin-inline: auto;
}

/* grain overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border-violet);
  background: rgba(16, 16, 24, 0.88);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.85rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--moon-silver);
  font-weight: 600;
  font-size: 1.1rem;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border-violet);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--moon-silver);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-violet);
  color: var(--moon-silver);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.1rem;
}

/* hero */
.hero {
  position: relative;
  padding: 5rem 0 6rem;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 55%;
  height: 120%;
  background: radial-gradient(ellipse at center, rgba(109, 61, 255, 0.22), transparent 68%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: -5%;
  width: 40%;
  height: 60%;
  background: radial-gradient(ellipse at center, rgba(63, 224, 181, 0.12), transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border-violet);
  background: var(--panel-dark);
  color: var(--jade-glow);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

.hero h1 span {
  color: var(--soft-gold);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--jade-glow), var(--deep-jade));
  color: var(--night-ink);
  box-shadow: 0 8px 28px rgba(63, 224, 181, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(63, 224, 181, 0.35);
  color: var(--night-ink);
}

.btn-ghost {
  background: transparent;
  color: var(--moon-lilac);
  border: 1px solid var(--border-violet);
}

.btn-ghost:hover {
  border-color: var(--moon-lilac);
  color: var(--moon-silver);
}

.hero-phone {
  position: relative;
  max-width: 320px;
  margin-inline: auto;
}

.hero-phone::before {
  content: "";
  position: absolute;
  inset: -8%;
  border-radius: 32px;
  border: 1px solid var(--soft-gold);
  opacity: 0.35;
}

.hero-phone img {
  border-radius: 28px;
  border: 1px solid var(--border-violet);
  box-shadow: 0 32px 64px rgba(0, 0, 0, 0.55);
}

/* sections */
section {
  padding: 5rem 0;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--jade-glow);
  margin-bottom: 0.75rem;
}

.section-header {
  max-width: 36rem;
  margin-bottom: 3rem;
}

.section-header h2 {
  color: var(--moon-silver);
}

.alt-bg {
  background: linear-gradient(180deg, var(--shadow-purple) 0%, var(--night-ink) 100%);
  border-block: 1px solid var(--border-violet);
}

/* feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature-card {
  padding: 1.75rem;
  background: var(--panel-dark);
  border: 1px solid var(--border-violet);
  border-radius: var(--radius-lg);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.feature-card:hover {
  border-color: var(--royal-violet);
  transform: translateY(-4px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(109, 61, 255, 0.2);
  color: var(--jade-glow);
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  color: var(--moon-silver);
  margin-bottom: 0.5rem;
}

/* screenshots */
.screenshot-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.screenshot-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-violet);
  aspect-ratio: 9 / 19.5;
  background: var(--card-smoke);
}

.screenshot-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  transition: transform 0.4s ease;
}

.screenshot-item:hover img {
  transform: scale(1.04);
}

.screenshot-item.featured {
  grid-column: span 2;
  grid-row: span 2;
  aspect-ratio: auto;
}

/* split panels */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.panel {
  padding: 2rem;
  background: var(--panel-dark);
  border: 1px solid var(--border-violet);
  border-radius: var(--radius-lg);
}

.panel-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.panel-list li {
  display: flex;
  gap: 0.75rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border-violet);
  color: var(--muted);
}

.panel-list li:last-child { border-bottom: none; }

.panel-list i {
  color: var(--soft-gold);
  margin-top: 0.2rem;
  flex-shrink: 0;
}

/* art gallery */
.art-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.art-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-violet);
  aspect-ratio: 3 / 4;
}

.art-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.art-card figcaption {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  padding: 1rem;
  background: linear-gradient(transparent, rgba(16, 16, 24, 0.92));
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--moon-silver);
}

/* stats */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.stat-box {
  text-align: center;
  padding: 1.5rem;
  background: var(--card-smoke);
  border: 1px solid var(--border-violet);
  border-radius: var(--radius-md);
}

.stat-box strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2.25rem;
  color: var(--jade-glow);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.stat-box span {
  font-size: 0.85rem;
  color: var(--muted);
}

/* CTA band */
.cta-band {
  text-align: center;
  padding: 4rem 2rem;
  background: linear-gradient(135deg, rgba(109, 61, 255, 0.25), rgba(18, 140, 116, 0.2));
  border: 1px solid var(--border-violet);
  border-radius: var(--radius-lg);
}

.cta-band h2 {
  color: var(--moon-silver);
}

/* footer */
.site-footer {
  border-top: 1px solid var(--border-violet);
  padding: 3rem 0 2rem;
  background: var(--panel-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-grid h4 {
  font-family: var(--font-body);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--moon-lilac);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li { margin-bottom: 0.5rem; }

.footer-links a { color: var(--muted); }

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-violet);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* legal pages */
.legal-page {
  padding: 4rem 0 6rem;
}

.legal-page h1 {
  color: var(--moon-silver);
  margin-bottom: 0.5rem;
}

.legal-meta {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 2.5rem;
}

.legal-content {
  max-width: 42rem;
}

.legal-content h2 {
  font-size: 1.5rem;
  color: var(--moon-lilac);
  margin-top: 2.5rem;
}

.legal-content ul {
  padding-left: 1.25rem;
  color: var(--muted);
}

.legal-content li { margin-bottom: 0.5rem; }

/* responsive */
@media (max-width: 960px) {
  .hero-grid,
  .split,
  .feature-grid,
  .screenshot-strip,
  .art-grid,
  .stats-row,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .screenshot-item.featured {
    grid-column: span 1;
    grid-row: span 1;
  }

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

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

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

  .nav-toggle { display: block; }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 1rem 1.25rem 1.5rem;
    background: var(--panel-dark);
    border-bottom: 1px solid var(--border-violet);
    gap: 1rem;
  }

  .site-nav.open { display: flex; }

  .site-header .container { position: relative; }
}

@media (max-width: 520px) {
  .screenshot-strip { grid-template-columns: 1fr; }
  .hero { padding-top: 3rem; }
}