:root {
  --bg: #0f1226;
  --panel: #1b2040;
  --panel-soft: #232a54;
  --text: #eef2ff;
  --muted: #b8c0ea;
  --primary: #8d9eff;
  --primary-strong: #6f84ff;
  --ok: #7ee0bc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 10% 10%, #1e2450 0%, var(--bg) 45%);
  line-height: 1.6;
}

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

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  background: rgba(15, 18, 38, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  z-index: 10;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 64px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.5px;
}

.nav nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.battery {
  display: flex;
  align-items: center;
  color: #d8e2ff;
  font-size: 12px;
  cursor: pointer;
}

.battery-shell {
  position: relative;
  width: 34px;
  height: 16px;
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 4px;
  padding: 2px;
  display: inline-flex;
  align-items: center;
}

.battery-question {
  width: 100%;
  text-align: center;
  font-size: 12px;
  font-weight: 700;
  color: #ffffff;
  line-height: 1;
}

.battery-cap {
  position: absolute;
  right: -4px;
  top: 4px;
  width: 3px;
  height: 6px;
  border-radius: 1px;
  background: rgba(255, 255, 255, 0.75);
}

.sleep-log-btn {
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.08);
  color: #eaf0ff;
  border-radius: 10px;
  padding: 6px 10px;
  font-size: 12px;
  cursor: pointer;
}

.sleep-log-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

.hero {
  padding: 72px 0 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
}

.tag {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  background: rgba(141, 158, 255, 0.18);
  color: #dbe1ff;
}

h1 {
  margin: 14px 0 12px;
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.2;
}

.desc {
  color: var(--muted);
  max-width: 56ch;
}

.hero-actions {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  border: none;
  border-radius: 12px;
  padding: 11px 18px;
  font-size: 14px;
  cursor: pointer;
  transition: 0.2s ease;
}

.btn.primary {
  background: var(--primary);
  color: #0d1030;
  font-weight: 600;
}

.btn.primary:hover {
  background: var(--primary-strong);
}

.btn.ghost {
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text);
}

.btn.ghost:hover {
  background: rgba(255, 255, 255, 0.08);
}

.small-btn {
  margin-top: 10px;
  padding: 8px 12px;
  font-size: 13px;
}

.hero-card {
  background: linear-gradient(160deg, rgba(126, 224, 188, 0.15), rgba(141, 158, 255, 0.08));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  padding: 22px;
}

.hero-card ul {
  margin: 10px 0 0;
  padding-left: 18px;
}

.tip {
  margin-top: 14px;
  color: #d7fff1;
  background: rgba(16, 19, 43, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 10px 12px;
  border-radius: 10px;
  min-height: 48px;
}

.section {
  padding: 46px 0;
}

.section h2 {
  font-size: 30px;
  margin: 0 0 8px;
}

.section-sub {
  color: var(--muted);
  margin: 0 0 20px;
}

.group {
  margin-bottom: 24px;
}

.group h3 {
  margin: 0 0 12px;
  color: #dfe5ff;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.card {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 14px;
}

.card h4 {
  margin: 0 0 6px;
  font-size: 16px;
}

.waterproof-tag {
  display: inline-block;
  vertical-align: middle;
  margin-left: 6px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  color: #0d1030;
  background: #7ee0bc;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.alt {
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.scene-grid article {
  background: var(--panel-soft);
  border-radius: 14px;
  padding: 16px;
}

.scene-grid h4 {
  margin: 0 0 6px;
}

.scene-grid p {
  margin: 0;
  color: var(--muted);
}

.music-player {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 18px;
}

.music-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.music-label {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

#trackTitle {
  margin: 4px 0 0;
  font-size: 18px;
}

#localAudio {
  display: none;
}

.upload-btn {
  border: 1px dashed rgba(255, 255, 255, 0.35);
  border-radius: 10px;
  padding: 8px 12px;
  color: #dbe1ff;
  font-size: 13px;
  cursor: pointer;
}

.controls {
  display: flex;
  gap: 10px;
  margin: 16px 0;
  flex-wrap: wrap;
}

.progress-wrap {
  display: grid;
  grid-template-columns: 48px 1fr 48px;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
}

#progress {
  width: 100%;
}

.cta-box {
  background: linear-gradient(120deg, rgba(141, 158, 255, 0.2), rgba(126, 224, 188, 0.15));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  padding: 26px;
  text-align: center;
}

.cta p {
  color: var(--muted);
}

.footer {
  padding: 20px 0 34px;
  color: #9aa5de;
  text-align: center;
  font-size: 14px;
}

.voice-float-btn {
  margin-top: 14px;
  border: none;
  border-radius: 50%;
  width: 110px;
  height: 110px;
  padding: 0;
  font-size: 16px;
  font-weight: 600;
  background: #21c45d;
  color: #ffffff;
  box-shadow: 0 10px 30px rgba(33, 196, 93, 0.45), 0 0 0 10px rgba(33, 196, 93, 0.15);
  cursor: pointer;
  display: grid;
  place-items: center;
  animation: pulseGlow 1.6s ease-in-out infinite;
}

.voice-float-btn:hover {
  background: #1baa51;
}

@keyframes pulseGlow {
  0% {
    transform: scale(1);
    box-shadow: 0 10px 30px rgba(33, 196, 93, 0.45), 0 0 0 0 rgba(33, 196, 93, 0.35);
  }
  70% {
    transform: scale(1.05);
    box-shadow: 0 12px 34px rgba(33, 196, 93, 0.5), 0 0 0 18px rgba(33, 196, 93, 0);
  }
  100% {
    transform: scale(1);
    box-shadow: 0 10px 30px rgba(33, 196, 93, 0.45), 0 0 0 0 rgba(33, 196, 93, 0);
  }
}

@media (max-width: 900px) {
  .hero-grid,
  .cards,
  .scene-grid {
    grid-template-columns: 1fr;
  }

  .nav nav {
    display: none;
  }

  .battery {
    font-size: 11px;
  }

  .sleep-log-btn {
    font-size: 11px;
    padding: 5px 8px;
  }

  .hero {
    padding-top: 52px;
  }

  .voice-float-btn {
    width: 92px;
    height: 92px;
    font-size: 14px;
  }
}