:root {
  color-scheme: dark;
  --bg: #010102;
  --text: rgba(248, 250, 255, 0.96);
  --muted: rgba(194, 203, 219, 0.74);
  --display-font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  --body-font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  --pink-panel: #f5cfd7;
  --pink-text: #171516;
  --pink-muted: rgba(23, 21, 22, 0.78);
  --pink-line: rgba(23, 21, 22, 0.28);
  --pink-accent: #e86398;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--body-font);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.34) 0%, rgba(0, 0, 0, 0.14) 22%, rgba(0, 0, 0, 0.52) 100%),
    radial-gradient(circle at 10% 55%, rgba(255, 238, 224, 0.11), transparent 10%),
    radial-gradient(circle at 84% 44%, rgba(166, 214, 255, 0.08), transparent 20%);
}

a {
  color: inherit;
  text-decoration: none;
}

.video-backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background: #010102;
}

.video-backdrop__media {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  transform: scale(1.04);
  filter: saturate(0.94) brightness(0.72) contrast(1.02);
}

.video-backdrop__shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.58) 0%, rgba(0, 0, 0, 0.34) 24%, rgba(0, 0, 0, 0.08) 52%, rgba(0, 0, 0, 0.24) 100%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.18) 0%, rgba(0, 0, 0, 0.02) 20%, rgba(0, 0, 0, 0.34) 100%);
}

.hero-shell {
  position: relative;
  z-index: 2;
  width: 100%;
  min-height: 100vh;
  padding: 18px 32px 32px;
}

.topbar,
.hero-stage,
.features-stage {
  max-width: 1680px;
  margin: 0 auto;
}

.topbar {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}

.brand {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.topnav {
  display: flex;
  justify-content: center;
  gap: 28px;
  color: rgba(233, 237, 244, 0.84);
  font-size: 0.92rem;
}

.topnav a:hover {
  color: #fff;
}

.topbar-actions,
.hero-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.button {
  min-height: 50px;
  padding: 12px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease,
    box-shadow 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(180deg, #2290ff 0%, #1477e8 100%);
  border-color: rgba(121, 187, 255, 0.78);
  box-shadow: 0 12px 30px rgba(18, 104, 215, 0.28);
}

.button-dark {
  background: #101010;
  color: #fff;
  border-color: #101010;
}

.hero-stage {
  position: relative;
  min-height: calc(100vh - 96px);
  padding: 0 0 120px;
}

.hero-copy {
  position: absolute;
  left: 4px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  max-width: 620px;
}

.eyebrow {
  margin: 0 0 16px;
  color: rgba(221, 231, 246, 0.8);
  font-size: 0.84rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero-copy h1 {
  margin: 0;
  font-family: var(--display-font);
  font-size: clamp(4rem, 7vw, 5.8rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.055em;
}

.summary {
  margin: 26px 0 0;
  max-width: 560px;
  color: rgba(223, 230, 241, 0.82);
  font-size: 1.04rem;
  line-height: 1.78;
}

.summary br {
  display: block;
  content: "";
  margin-top: 10px;
}

.hero-actions {
  margin-top: 34px;
}

.hero-metrics {
  position: absolute;
  right: 3.2%;
  bottom: 86px;
  z-index: 3;
  display: flex;
  gap: 86px;
  align-items: flex-end;
}

.metric {
  min-width: 150px;
}

.metric strong {
  display: block;
  font-size: clamp(3.3rem, 6vw, 4.8rem);
  font-weight: 300;
  line-height: 0.9;
  letter-spacing: -0.05em;
}

.metric span {
  display: block;
  margin-top: 12px;
  color: rgba(218, 226, 240, 0.56);
  font-size: 0.96rem;
}

.features-stage {
  padding: 28px 0 48px;
}

.features-panel {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 46px;
  padding: 42px 0 12px;
  color: rgba(248, 250, 255, 0.96);
}

.features-intro {
  display: grid;
  align-content: start;
  gap: 20px;
}

.features-intro__eyebrow {
  margin: 0;
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(248, 250, 255, 0.72);
}

.features-intro h2 {
  margin: 0;
  font-family: var(--display-font);
  font-size: clamp(4.2rem, 7vw, 6.8rem);
  font-weight: 900;
  line-height: 0.9;
  letter-spacing: -0.08em;
  text-transform: uppercase;
  color: rgba(248, 250, 255, 0.96);
}

.features-intro__summary {
  max-width: 420px;
  margin: 0;
  color: rgba(223, 230, 241, 0.82);
  font-size: 1rem;
  line-height: 1.72;
}

.features-intro__download {
  width: fit-content;
  margin-top: 16px;
  padding: 16px 34px;
  border-radius: 999px;
  background: #111;
  color: #fff;
  font-size: 1rem;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px 28px;
}

.feature-card {
  position: relative;
  padding-top: 24px;
}

.feature-card__rule {
  width: 100%;
  height: 1px;
  margin-bottom: 22px;
  background: rgba(255, 255, 255, 0.22);
}

.feature-card__index {
  display: block;
  margin-bottom: 10px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(248, 250, 255, 0.7);
}

.feature-card__title {
  margin: 0;
  font-family: var(--display-font);
  font-size: clamp(2.1rem, 3vw, 3.1rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.06em;
  text-transform: uppercase;
  color: rgba(248, 250, 255, 0.96);
}

.feature-card__lead {
  margin: 18px 0 0;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.55;
  color: rgba(248, 250, 255, 0.96);
}

.feature-card__body {
  margin: 10px 0 0;
  color: rgba(223, 230, 241, 0.8);
  font-size: 0.98rem;
  line-height: 1.72;
}

.feature-card--lead {
  grid-column: 1 / -1;
  padding: 28px 0 6px;
}

.feature-card--lead .feature-card__rule {
  margin-bottom: 26px;
}

.feature-card--lead .feature-card__title {
  font-size: clamp(3rem, 5vw, 4.4rem);
}

.feature-card--accent .feature-card__title {
  color: rgba(248, 250, 255, 0.96);
}

.features-closure {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-top: 32px;
  padding-top: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  text-align: center;
}

.features-closure__title {
  margin: 0;
  font-family: var(--display-font);
  font-size: 2.4rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.05em;
  color: rgba(248, 250, 255, 0.96);
}

.features-closure__body {
  margin: 14px 0 0;
  color: rgba(223, 230, 241, 0.82);
  font-size: 1rem;
}

.features-closure .button-dark {
  margin-top: 22px;
}

@media (max-width: 1180px) {
  .hero-shell {
    padding-inline: 22px;
  }

  .topbar {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .topnav {
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 18px;
  }

  .hero-stage {
    min-height: auto;
    padding: 72px 0 420px;
  }

  .hero-copy {
    position: relative;
    top: auto;
    transform: none;
    padding-top: 80px;
  }

  .hero-metrics {
    right: 0;
    left: 0;
    bottom: 180px;
    gap: 46px;
    justify-content: flex-end;
  }

  .features-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .hero-shell {
    padding: 16px 16px 24px;
  }

  .video-backdrop__media {
    transform: scale(1.1);
    object-position: 58% center;
  }

  .topbar-actions,
  .hero-actions {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
  }

  .topnav {
    gap: 14px;
    font-size: 0.86rem;
  }

  .hero-stage {
    padding: 44px 0 280px;
  }

  .hero-copy {
    padding-top: 48px;
  }

  .hero-copy h1 {
    font-size: clamp(2.8rem, 15vw, 4rem);
  }

  .summary {
    font-size: 0.96rem;
  }

  .hero-metrics {
    bottom: 132px;
    justify-content: space-between;
    gap: 18px;
  }

  .metric {
    min-width: 0;
  }

  .metric strong {
    font-size: clamp(2.2rem, 12vw, 3.4rem);
  }

  .features-stage {
    padding: 20px 0 40px;
  }

  .features-panel {
    gap: 30px;
    padding: 22px 0 10px;
  }

  .features-intro h2 {
    font-size: clamp(2.8rem, 16vw, 4.2rem);
  }

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

  .feature-card__title,
  .feature-card--lead .feature-card__title {
    font-size: clamp(2rem, 11vw, 3rem);
  }

  .features-closure {
    align-items: center;
    margin-top: 26px;
    padding-top: 38px;
  }

  .features-intro__download,
  .button-dark {
    width: 100%;
    justify-content: center;
  }
}