:root {
  --bg: #0b0c10;
  --bg-soft: #14161c;
  --text: #e6e8ef;
  --muted: #a8afc1;
  --primary: #6ea8fe;
  --accent: #f38ba8;
  --card: #1a1d24;
}
* { box-sizing: border-box }
html, body { height: 100% }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  line-height: 1.6;
}
.hero {
  position: relative;
  min-height: 360px;
  display: grid;
  place-items: center;
  padding: 20px 20px 32px;
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0) 60%), var(--bg);
}
.topnav {
  position: absolute;
  top: 20px;
  left: 20px;
  height: auto;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0;
  background: none;
  backdrop-filter: none;
  border-radius: 0;
  max-width: none;
  outline: none;
  box-shadow: none;
  z-index: 10;
}
.logo {
  font-weight: 700;
  letter-spacing: 0.4px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #7ab4ff 0%, #b084ff 60%, #ff9ad5 100%);
  box-shadow: 0 10px 20px rgba(110,168,254,0.25);
  display: grid;
  place-items: center;
  outline: 1px solid rgba(255,255,255,0.14);
  transition: transform .18s ease;
}
.brand-mark-text {
  font-weight: 800;
  font-size: 16px;
  color: #ffffff;
}
.brand-text {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.2px;
}
.brand-king {
  background: linear-gradient(90deg, #7ab4ff, #b084ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand:hover .brand-mark { transform: translateY(-1px) scale(1.04) }
.brand:hover .brand-king { filter: brightness(1.1) }
.brand-logo {
  height: 96px;
  width: auto;
  display: inline-block;
  object-fit: contain;
  background: none;
  margin-right: auto;
}
.nav-actions { display: flex; gap: 10px }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 14px;
  border-radius: 10px;
  text-decoration: none;
  font-size: 14px;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn-primary {
  color: #0b0c10;
  background: linear-gradient(90deg, #7ab4ff, #b084ff);
  box-shadow: 0 10px 20px rgba(110,168,254,0.22);
}
.btn-primary:hover { transform: translateY(-1px) }
.btn-ghost {
  color: var(--text);
  background: rgba(255,255,255,0.06);
  outline: 1px solid rgba(255,255,255,0.12);
}
.btn-ghost:hover { background: rgba(255,255,255,0.1) }
.poster-marquee {
  position: absolute;
  inset: 0 0 auto 0;
  height: 280px;
  overflow: hidden;
  opacity: 0.22;
  pointer-events: none;
}
.poster-track {
  display: flex;
  gap: 24px;
  padding: 16px 24px;
  will-change: transform;
  animation: marquee 40s linear infinite;
}
.poster {
  width: 140px;
  height: 210px;
  border-radius: 14px;
  background-size: cover;
  background-position: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
  outline: 1px solid rgba(255,255,255,0.08);
  filter: saturate(0.95) contrast(1.05);
}
@keyframes marquee {
  from { transform: translateX(0) }
  to { transform: translateX(-50%) }
}
.hero-content {
  position: relative;
  text-align: center;
  z-index: 1;
  margin-top: 10px;
}
.hero-content h1 {
  margin: 0;
  font-size: clamp(28px, 5vw, 44px);
  letter-spacing: 0.6px;
}
.hero-content p {
  margin-top: 12px;
  color: var(--muted);
  font-size: clamp(14px, 2.5vw, 18px);
}
.hero-cta { margin-top: 16px; display: flex; gap: 10px; justify-content: center }
main { padding: 24px }
.features {
  max-width: 1160px;
  margin: 0 auto;
  display: grid;
  gap: 28px;
}
.feature-group h2 {
  margin: 0 0 10px;
  font-size: 18px;
  color: var(--muted);
}
.feature-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.feature-group:nth-child(2) .feature-row {
  grid-template-columns: repeat(2, 1fr);
}
.feature-card {
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 6px;
  align-content: start;
  padding: 16px;
  border-radius: 16px;
  text-decoration: none;
  color: var(--text);
  background: radial-gradient(1200px 500px at 0% 0%, rgba(110,168,254,0.12), transparent 36%), var(--card);
  outline: 1px solid rgba(255,255,255,0.06);
  transition: transform .2s ease, outline-color .2s ease, box-shadow .2s ease;
}
.feature-card:hover {
  transform: translateY(-2px);
  outline-color: rgba(110,168,254,0.28);
  box-shadow: 0 10px 30px rgba(110,168,254,0.08);
}
.feature-card:active { transform: translateY(0) }
.feature-icon {
  font-size: 24px;
}
.feature-title {
  font-weight: 600;
  font-size: 16px;
}
.feature-desc {
  color: var(--muted);
  font-size: 13px;
}
.feature-card.tilted { will-change: transform }
.modules {
  max-width: 1160px;
  margin: 20px auto 60px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.module {
  background: var(--card);
  border-radius: 18px;
  padding: 16px;
  outline: 1px solid rgba(255,255,255,0.06);
}
.module h3 {
  margin: 2px 0 12px;
  font-size: 16px;
}
.sample {
  height: 160px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--muted);
  background:
    radial-gradient(250px 120px at 0% 0%, rgba(243,139,168,0.18), transparent 42%),
    radial-gradient(250px 120px at 100% 100%, rgba(110,168,254,0.18), transparent 42%),
    linear-gradient(0deg, #151821, #171a23);
  outline: 1px dashed rgba(255,255,255,0.12);
}
.reviews {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 0 16px;
}
.review {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity .4s ease, transform .4s ease;
  color: var(--text);
  font-size: 14px;
}
.review.active {
  opacity: 0.95;
  transform: translateY(0);
}
.footer {
  border-top: 1px solid rgba(255,255,255,0.06);
  background: var(--bg-soft);
}
.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--muted);
}
@media (max-width: 1024px) {
  .modules { grid-template-columns: repeat(2, 1fr) }
  .poster { width: 120px; height: 180px }
}
@media (max-width: 640px) {
  .feature-row { grid-template-columns: 1fr }
  .modules { grid-template-columns: 1fr }
  main { padding: 16px }
  .footer-inner { flex-direction: column; gap: 8px }
}
html { scroll-behavior: smooth }