:root {
  color: #f6f8ff;
  background: #07080d;
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: #07080d; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(24px, calc((100vw - 1200px) / 2));
  background: rgba(7, 8, 13, .82);
  border-bottom: 1px solid rgba(255,255,255,.08);
  backdrop-filter: blur(18px);
}

.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 22px; font-weight: 900; }
.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #3c7dff, #15d4d8);
  box-shadow: 0 14px 34px rgba(21, 212, 216, .25);
}
nav { display: flex; align-items: center; gap: 28px; color: #aab4ca; font-weight: 700; }
nav a:hover { color: #fff; }

.hero {
  position: relative;
  min-height: 660px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 22% 42%, rgba(207, 47, 192, .34), transparent 28%),
    radial-gradient(circle at 78% 42%, rgba(10, 208, 222, .33), transparent 30%),
    linear-gradient(180deg, #080910 0%, #07080d 80%);
}
.hero-bg::before,
.hero-bg::after {
  content: "";
  position: absolute;
  width: 120vw;
  height: 260px;
  left: -10vw;
  bottom: 90px;
  transform: perspective(680px) rotateX(62deg);
  background:
    linear-gradient(90deg, transparent 0 12%, rgba(233,70,213,.82) 13%, transparent 16% 22%, rgba(44,119,255,.86) 23%, transparent 26% 36%, rgba(18,222,230,.92) 37%, transparent 41% 100%);
  filter: blur(.2px) drop-shadow(0 0 22px rgba(70, 190, 255, .45));
  opacity: .76;
  animation: railDrift 13s ease-in-out infinite alternate;
}
.hero-bg::after { bottom: 0; filter: blur(22px); opacity: .26; animation-duration: 17s; }
.beam {
  position: absolute;
  width: 42vw;
  height: 4px;
  border-radius: 999px;
  transform: rotate(-12deg);
  opacity: .62;
  filter: blur(.2px) drop-shadow(0 0 16px currentColor);
  animation: beamSweep 8s ease-in-out infinite;
}
.beam-one { left: -12vw; bottom: 170px; color: #e94bd6; background: linear-gradient(90deg, transparent, #e94bd6, transparent); }
.beam-two { left: 21vw; bottom: 150px; color: #3d7cff; background: linear-gradient(90deg, transparent, #3d7cff, transparent); animation-delay: -2.8s; }
.beam-three { right: -8vw; bottom: 190px; color: #17dce6; background: linear-gradient(90deg, transparent, #17dce6, transparent); animation-delay: -5.2s; }
.spark {
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: #79f2ff;
  box-shadow: 0 0 18px #79f2ff;
  opacity: .72;
  animation: sparkFloat 7s ease-in-out infinite;
}
.spark-one { left: 28%; top: 34%; }
.spark-two { left: 62%; top: 28%; animation-delay: -2s; }
.spark-three { left: 76%; top: 54%; animation-delay: -4s; }
.hero-inner {
  position: relative;
  width: min(100%, 1080px);
  padding: 82px 24px 130px;
  text-align: center;
}
.release-pill {
  width: fit-content;
  margin: 0 auto 28px;
  padding: 9px 16px;
  border-radius: 999px;
  color: #7bb5ff;
  background: rgba(42, 91, 184, .22);
  border: 1px solid rgba(80, 130, 255, .24);
  font-weight: 800;
}
.release-pill span {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  border-radius: 999px;
  background: #28e6a4;
  box-shadow: 0 0 16px #28e6a4;
}
h1 {
  margin: 0;
  font-size: clamp(38px, 5.2vw, 68px);
  line-height: 1.12;
  letter-spacing: 0;
}
.hero-copy {
  max-width: 680px;
  margin: 24px auto 34px;
  color: #c2cae0;
  font-size: 19px;
  line-height: 1.72;
  font-weight: 700;
}
.hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.primary, .secondary, button {
  min-width: 138px;
  min-height: 50px;
  border: 0;
  border-radius: 999px;
  padding: 13px 24px;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}
.primary { color: #06111d; background: #fff; box-shadow: 0 20px 60px rgba(255,255,255,.16); }
.secondary { color: #fff; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15); }
button:disabled { color: #94a0b9; background: rgba(255,255,255,.08); cursor: not-allowed; }

.section {
  width: min(100%, 1180px);
  margin: 0 auto;
  padding: 72px 24px;
}
.section-heading { text-align: center; max-width: 720px; margin: 0 auto 36px; }
.eyebrow { margin: 0 0 10px; color: #6ea3ff; font-weight: 900; text-transform: uppercase; letter-spacing: .12em; }
h2 { margin: 0; font-size: clamp(30px, 3.2vw, 42px); line-height: 1.18; }
.section-heading p:not(.eyebrow), .contact-card p { color: #aeb8d0; line-height: 1.75; font-size: 17px; }
.feature-grid, .download-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
.feature-grid article, .download-card, .contact-card, details {
  background: #11121a;
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 14px;
  padding: 28px;
  box-shadow: 0 24px 80px rgba(0,0,0,.24);
}
.icon, .device {
  width: 50px;
  height: 50px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  color: #61dfff;
  background: rgba(19, 201, 220, .14);
  font-size: 24px;
}
.feature-grid h3, .download-card h3 { margin: 0 0 12px; font-size: 22px; }
.feature-grid p, .download-card p, details p { color: #b6bfd6; line-height: 1.68; font-size: 16px; }
.download-card { text-align: center; }
.download-card .device { margin-left: auto; margin-right: auto; color: #9da8c0; background: rgba(255,255,255,.06); }
.download-card .primary { display: inline-flex; align-items: center; justify-content: center; margin-top: 18px; border-radius: 12px; color: #fff; background: #3c7dff; }
.muted-card { opacity: .72; }
.faq-list { display: grid; gap: 16px; max-width: 900px; margin: 0 auto; }
summary { cursor: pointer; font-size: 20px; font-weight: 900; }
.contact-card { display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.contact-lines { display: grid; gap: 12px; color: #d8def0; font-weight: 800; }
footer {
  width: min(100%, 1240px);
  margin: 0 auto;
  padding: 28px 24px 48px;
  display: flex;
  justify-content: space-between;
  color: #8792ad;
  border-top: 1px solid rgba(255,255,255,.08);
}

@keyframes railDrift {
  from { transform: perspective(680px) rotateX(62deg) translateX(-18px); filter: blur(.2px) drop-shadow(0 0 18px rgba(70, 190, 255, .38)); }
  to { transform: perspective(680px) rotateX(62deg) translateX(24px); filter: blur(1.2px) drop-shadow(0 0 26px rgba(70, 190, 255, .52)); }
}

@keyframes beamSweep {
  0%, 100% { transform: rotate(-12deg) translateX(-3vw); opacity: .34; }
  45%, 65% { opacity: .82; }
  50% { transform: rotate(-12deg) translateX(8vw); }
}

@keyframes sparkFloat {
  0%, 100% { transform: translate3d(0, 0, 0); opacity: .32; }
  50% { transform: translate3d(18px, -14px, 0); opacity: .86; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-bg::before,
  .hero-bg::after,
  .beam,
  .spark {
    animation: none;
  }
}

@media (max-width: 860px) {
  .site-header { height: auto; padding: 18px 20px; align-items: flex-start; gap: 16px; flex-direction: column; }
  nav { gap: 16px; flex-wrap: wrap; }
  .hero { min-height: 600px; }
  .feature-grid, .download-grid { grid-template-columns: 1fr; }
  .contact-card { align-items: flex-start; flex-direction: column; }
  footer { flex-direction: column; gap: 12px; }
}