:root {
  color-scheme: dark;
  --bg: #000;
  --text: #fff;
  --muted: rgba(255, 255, 255, 0.44);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.page-shell {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  background: #000;
}

.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.brand-name {
  margin: 0;
  padding-top: 78px;
  font-size: clamp(32px, 3vw, 44px);
  line-height: 1.2;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.glass-panel {
  margin-top: 18px;
}

h1 {
  margin: 0;
  font-size: clamp(16px, 1.35vw, 20px);
  line-height: 1.5;
  font-weight: 400;
  color: var(--muted);
}

.subtitle {
  margin: 4px 0 0;
  font-size: clamp(16px, 1.35vw, 20px);
  line-height: 1.5;
  font-weight: 400;
  color: var(--muted);
}

footer {
  position: absolute;
  left: 50%;
  bottom: 34px;
  z-index: 1;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.46);
  font-size: 14px;
  letter-spacing: 0.24em;
  text-indent: 0.24em;
}

@media (max-width: 700px) {
  .hero-video {
    width: 126%;
    left: 50%;
    transform: translateX(-50%);
  }

  .brand-name {
    padding-top: 40px;
    font-size: 28px;
  }

  .glass-panel {
    margin-top: 14px;
  }

  h1,
  .subtitle {
    font-size: 14px;
  }

  footer {
    bottom: 24px;
  }
}