:root {
  color-scheme: dark;
  --bg: #08090b;
  --surface: rgba(18, 19, 23, 0.76);
  --surface-solid: #121317;
  --line: rgba(255, 255, 255, 0.11);
  --text: #f6f7f9;
  --muted: #989ba6;
  --accent: #91ffbf;
  --accent-strong: #58f699;
  --max-width: 1180px;
  font-family:
    Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 75% 15%, rgba(79, 183, 124, 0.08), transparent 34%),
    linear-gradient(180deg, #08090b 0%, #0a0b0e 100%);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  pointer-events: none;
  opacity: 0.22;
  background-image:
    radial-gradient(circle at 10% 20%, white 0 0.7px, transparent 0.9px),
    radial-gradient(circle at 80% 30%, white 0 0.6px, transparent 0.8px),
    radial-gradient(circle at 45% 65%, white 0 0.6px, transparent 0.8px),
    radial-gradient(circle at 68% 84%, white 0 0.7px, transparent 0.9px);
  background-size: 170px 190px, 240px 220px, 210px 250px, 290px 270px;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 20;
  padding: 10px 16px;
  color: #09110d;
  background: var(--accent);
  border-radius: 8px;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: none;
}

.ambient {
  position: fixed;
  z-index: -1;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(110px);
  opacity: 0.07;
  background: var(--accent);
}

.ambient-one {
  top: -260px;
  right: -140px;
}

.ambient-two {
  bottom: -340px;
  left: -220px;
}

.site-header,
main,
footer {
  width: min(calc(100% - 40px), var(--max-width));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 88px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  gap: 11px;
  align-items: center;
  font-size: 17px;
  font-weight: 670;
  letter-spacing: 0.05em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 27px;
  height: 27px;
  place-items: center;
  border: 1px solid rgba(145, 255, 191, 0.45);
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(145, 255, 191, 0.16);
}

.brand-mark span {
  width: 7px;
  height: 7px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent);
}

.platform-note {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 0.83fr);
  gap: clamp(48px, 7vw, 108px);
  align-items: center;
  min-height: 680px;
  padding: 76px 0 84px;
}

.eyebrow {
  display: flex;
  gap: 9px;
  align-items: center;
  margin: 0 0 24px;
  color: #b7bac3;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.13em;
}

.eyebrow span {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent);
}

h1 {
  max-width: 650px;
  margin: 0;
  font-size: clamp(54px, 6.4vw, 88px);
  font-weight: 680;
  line-height: 0.98;
  letter-spacing: -0.065em;
}

h1 em {
  color: var(--accent);
  font-style: normal;
  text-shadow: 0 0 42px rgba(145, 255, 191, 0.14);
}

.lead {
  max-width: 570px;
  margin: 30px 0 0;
  color: #a9acb5;
  font-size: 17px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
  scroll-margin-top: 20px;
}

.button {
  display: inline-flex;
  gap: 13px;
  align-items: center;
  min-width: 214px;
  min-height: 64px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 14px;
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.button-primary {
  color: #08100c;
  background: var(--accent);
  box-shadow: 0 14px 42px rgba(88, 246, 153, 0.14);
}

.button-primary:hover {
  background: #afffce;
}

.button-secondary {
  background: rgba(255, 255, 255, 0.055);
  border-color: var(--line);
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

.button-icon {
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  font-size: 24px;
  line-height: 1;
}

.android-icon {
  font-size: 12px;
  border: 2px solid currentColor;
  border-radius: 8px;
}

.button strong,
.button small {
  display: block;
}

.button strong {
  font-size: 14px;
  line-height: 1.4;
}

.button small {
  margin-top: 2px;
  color: inherit;
  font-size: 10px;
  opacity: 0.64;
}

.release-hint {
  margin: 14px 0 0;
  color: #6f727c;
  font-size: 11px;
}

.product-preview {
  position: relative;
  overflow: hidden;
  min-height: 488px;
  background: linear-gradient(155deg, rgba(25, 27, 32, 0.96), rgba(11, 12, 15, 0.96));
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 26px;
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.46), inset 0 1px rgba(255, 255, 255, 0.035);
  transform: perspective(1200px) rotateY(-3deg) rotateX(1deg);
}

.product-preview::after {
  position: absolute;
  inset: auto 15% -28% 15%;
  height: 42%;
  content: "";
  background: var(--accent);
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.055;
}

.preview-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 54px;
  padding: 0 18px;
  color: #a8abb4;
  font-size: 11px;
  border-bottom: 1px solid var(--line);
}

.preview-brand {
  display: flex;
  gap: 8px;
  align-items: center;
}

.preview-brand i,
.status-pill i {
  display: block;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.window-controls {
  color: #6f727a;
  letter-spacing: 0.08em;
}

.preview-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 36px 38px 32px;
}

.status-pill {
  display: flex;
  gap: 7px;
  align-items: center;
  padding: 7px 11px;
  color: #adb0b8;
  font-size: 10px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--line);
  border-radius: 99px;
}

.status-pill i {
  box-shadow: 0 0 8px var(--accent);
  animation: breathe 2.6s ease-in-out infinite;
}

.connect-orb {
  position: relative;
  display: grid;
  width: 144px;
  height: 144px;
  margin-top: 34px;
  padding: 0;
  place-items: center;
  color: var(--accent);
  background: radial-gradient(circle, #171d1a 0%, #101310 66%, #0d0f0e 100%);
  border: 1px solid rgba(145, 255, 191, 0.42);
  border-radius: 50%;
  box-shadow:
    0 0 0 12px rgba(145, 255, 191, 0.022),
    0 0 58px rgba(145, 255, 191, 0.13),
    inset 0 0 26px rgba(145, 255, 191, 0.055);
}

.orb-ring {
  position: absolute;
  inset: -15px;
  border: 1px solid rgba(145, 255, 191, 0.08);
  border-radius: 50%;
  animation: orbit 7s linear infinite;
}

.orb-ring::before {
  position: absolute;
  top: 10px;
  right: 20px;
  width: 5px;
  height: 5px;
  content: "";
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent);
}

.power-symbol {
  position: relative;
  width: 42px;
  height: 42px;
  border: 3px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
}

.power-symbol::before {
  position: absolute;
  top: -11px;
  left: 17px;
  width: 3px;
  height: 25px;
  content: "";
  background: currentColor;
  border-radius: 4px;
  box-shadow: 0 0 10px rgba(145, 255, 191, 0.5);
}

.preview-title {
  margin: 25px 0 0;
  font-size: 18px;
  font-weight: 650;
}

.preview-subtitle {
  margin: 7px 0 0;
  color: #777a84;
  font-size: 11px;
}

.plan-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin-top: 34px;
  padding: 16px 17px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--line);
  border-radius: 13px;
}

.plan-card small,
.plan-card strong {
  display: block;
}

.plan-card small {
  margin-bottom: 4px;
  color: #737680;
  font-size: 9px;
}

.plan-card strong,
.plan-detail {
  font-size: 11px;
}

.plan-detail {
  color: #9a9da6;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 84px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.principles article {
  display: flex;
  gap: 18px;
  min-height: 142px;
  padding: 28px 26px;
  align-items: flex-start;
}

.principles article + article {
  border-left: 1px solid var(--line);
}

.number {
  margin-top: 3px;
  color: var(--accent);
  font-family: ui-monospace, monospace;
  font-size: 10px;
}

.principles h2 {
  margin: 0;
  font-size: 15px;
  font-weight: 650;
}

.principles p {
  margin: 8px 0 0;
  color: #81848e;
  font-size: 12px;
  line-height: 1.7;
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 90px;
  color: #666973;
  font-size: 11px;
}

@keyframes breathe {
  0%, 100% { opacity: 0.5; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.15); }
}

@keyframes orbit {
  to { transform: rotate(360deg); }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 64px;
    padding-top: 60px;
  }

  .hero-copy {
    text-align: center;
  }

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

  .lead {
    margin-inline: auto;
  }

  .product-preview {
    width: min(100%, 520px);
    margin-inline: auto;
    transform: none;
  }
}

@media (max-width: 680px) {
  .site-header,
  main,
  footer {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .site-header {
    height: 72px;
  }

  .platform-note {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 54px 0 64px;
  }

  h1 {
    font-size: clamp(48px, 15vw, 66px);
  }

  .lead {
    font-size: 15px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
    justify-content: center;
  }

  .product-preview {
    min-height: 456px;
  }

  .preview-body {
    padding-inline: 20px;
  }

  .connect-orb {
    width: 128px;
    height: 128px;
  }

  .plan-card {
    align-items: flex-start;
  }

  .plan-detail {
    max-width: 115px;
    line-height: 1.5;
    text-align: right;
  }

  .principles {
    grid-template-columns: 1fr;
  }

  .principles article + article {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  footer {
    flex-direction: column;
    justify-content: center;
    gap: 7px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}