:root {
  --bg-deep: #0a0a0c;
  --bg-card: rgba(28, 28, 32, 0.85);
  --gold: #d4af37;
  --gold-dim: rgba(212, 175, 55, 0.35);
  --text: #f3f4f6;
  --muted: #9ca3af;
  --border: rgba(212, 175, 55, 0.22);
  --radius: 14px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--gold);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Ambient background */
.bg-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(212, 175, 55, 0.12), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 60%, rgba(120, 90, 20, 0.08), transparent 45%),
    radial-gradient(ellipse 50% 35% at 0% 80%, rgba(80, 60, 10, 0.06), transparent 40%);
}

.wrap {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(10, 10, 12, 0.75);
  border-bottom: 1px solid var(--border);
}

.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(145deg, var(--gold), #8a6a1a);
  display: grid;
  place-items: center;
  font-size: 18px;
  color: #1a1406;
  box-shadow: 0 0 24px var(--gold-dim);
}

.nav-links {
  display: flex;
  gap: 28px;
  font-size: 14px;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--gold);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: linear-gradient(145deg, #e8c85c, var(--gold), #a67c0a);
  color: #1a1406;
  box-shadow: 0 4px 28px rgba(212, 175, 55, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 32px rgba(212, 175, 55, 0.45);
}

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

.btn-ghost:hover {
  border-color: var(--gold);
  background: rgba(212, 175, 55, 0.08);
}

/* Hero */
.hero {
  padding: 56px 0 72px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .nav-links {
    display: none;
  }
}

.eyebrow {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin-bottom: 14px;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4vw, 2.85rem);
  line-height: 1.15;
  font-weight: 800;
  background: linear-gradient(135deg, #f5e6b8 0%, var(--gold) 45%, #c9a227 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 40px var(--gold-dim);
}

.hero-lead {
  margin: 0 0 28px;
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 32ch;
}

@media (max-width: 900px) {
  .hero-lead {
    margin-left: auto;
    margin-right: auto;
  }
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Phone frame */
.phone-stage {
  display: flex;
  justify-content: center;
}

.phone {
  position: relative;
  width: min(340px, 88vw);
  aspect-ratio: 9 / 19.5;
  border-radius: 36px;
  padding: 12px;
  background: linear-gradient(160deg, #2a2a2e, #121214);
  box-shadow:
    0 0 0 1px var(--border),
    0 40px 100px rgba(0, 0, 0, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.phone-notch {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 32%;
  height: 22px;
  background: #0a0a0c;
  border-radius: 0 0 14px 14px;
  z-index: 2;
}

.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 28px;
  overflow: hidden;
  background: #000;
}

.phone-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

/* Sections */
section {
  padding: 64px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 12px;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text);
}

.section-sub {
  text-align: center;
  margin: 0 auto 40px;
  max-width: 520px;
  color: var(--muted);
  font-size: 15px;
}

.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 768px) {
  .cards-3 {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  border-color: rgba(212, 175, 55, 0.45);
  transform: translateY(-2px);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 22px;
  background: rgba(212, 175, 55, 0.12);
  margin-bottom: 14px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--gold);
}

.card p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

/* Modes */
.modes {
  background: linear-gradient(180deg, transparent, rgba(212, 175, 55, 0.04), transparent);
}

.mode-tabs {
  display: flex;
  max-width: 420px;
  margin: 0 auto 32px;
  padding: 4px;
  border-radius: 999px;
  background: rgba(20, 20, 24, 0.9);
  border: 1px solid var(--border);
}

.mode-tab {
  flex: 1;
  text-align: center;
  padding: 12px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  cursor: default;
}

.mode-tab.active {
  background: linear-gradient(145deg, rgba(212, 175, 55, 0.25), rgba(212, 175, 55, 0.08));
  color: var(--gold);
  box-shadow: inset 0 0 0 1px var(--border);
}

.mode-dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

@media (max-width: 768px) {
  .mode-dual {
    grid-template-columns: 1fr;
  }
}

.mode-single {
  max-width: 920px;
  margin: 0 auto;
}

.mode-single .mode-panel img {
  aspect-ratio: auto;
  width: 100%;
  height: auto;
  max-height: min(72vh, 640px);
  object-fit: contain;
  object-position: center;
  background: #0d0d10;
}

.mode-panel {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.mode-panel img {
  width: 100%;
  display: block;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
}

.mode-panel .cap {
  padding: 16px 18px;
}

.mode-panel .cap h4 {
  margin: 0 0 6px;
  font-size: 1rem;
  color: var(--text);
}

.mode-panel .cap p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

/* VS strip */
.vs-strip {
  margin: 48px auto 0;
  max-width: 560px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 18px 24px;
  border-radius: 999px;
  background: rgba(18, 18, 22, 0.95);
  border: 1px solid var(--border);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

.vs-badge {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: #1a1406;
  background: radial-gradient(circle at 30% 30%, #fff3b0, var(--gold));
  box-shadow: 0 0 32px var(--gold-dim);
}

.vs-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.vs-actions .mini {
  padding: 10px 18px;
  font-size: 13px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* CTA */
.cta {
  text-align: center;
  padding: 80px 0 100px;
}

.cta h2 {
  margin: 0 0 12px;
  font-size: 1.6rem;
}

.cta p {
  margin: 0 0 24px;
  color: var(--muted);
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 24px 40px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

footer .wrap {
  padding: 0;
}