:root {
  --bg: #f4f8ff;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: rgba(255, 255, 255, 0.9);
  --line: rgba(103, 126, 165, 0.18);
  --text: #10213f;
  --muted: #5f7093;
  --blue: #2f6df6;
  --blue-deep: #0f49c7;
  --amber: #ffb74d;
  --green: #2ebc86;
  --pink: #ff6d9a;
  --shadow: 0 24px 80px rgba(41, 71, 129, 0.14);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Avenir Next", "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(86, 140, 255, 0.24), transparent 32%),
    radial-gradient(circle at 85% 12%, rgba(255, 183, 77, 0.2), transparent 22%),
    linear-gradient(180deg, #f9fbff 0%, #eef4ff 52%, #f9fbff 100%);
}

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

.site-shell {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  padding-bottom: 48px;
}

.topbar {
  position: sticky;
  top: 14px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 14px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px);
  box-shadow: 0 10px 30px rgba(39, 76, 150, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-logo {
  width: 42px;
  height: 42px;
  display: block;
  border-radius: 14px;
  object-fit: cover;
  box-shadow: 0 10px 24px rgba(47, 109, 246, 0.22);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand-text strong {
  font-size: 1rem;
}

.brand-text span {
  font-size: 0.8rem;
  color: var(--muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.95rem;
  color: var(--muted);
}

.nav a:hover {
  color: var(--text);
}

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.7);
  padding: 0;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 6px auto;
  border-radius: 999px;
  background: var(--text);
}

.hero,
.feature-grid,
.scenes,
.experience,
.download {
  margin-top: 28px;
  padding: clamp(28px, 5vw, 56px);
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 36px;
  align-items: center;
  min-height: 72vh;
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
  font-weight: 700;
}

.hero h1,
.section-heading h2,
.download h2 {
  margin: 0;
  font-size: clamp(2.1rem, 5.2vw, 4.7rem);
  line-height: 0.96;
  letter-spacing: -0.04em;
}

.hero-text,
.section-heading + p,
.download-copy p,
.experience-copy p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--muted);
}

.hero-actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

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

.button.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--blue-deep));
  box-shadow: 0 16px 30px rgba(37, 91, 214, 0.24);
}

.button.android {
  color: #fff;
  background: linear-gradient(135deg, var(--green), #0f766e);
  box-shadow: 0 16px 30px rgba(15, 118, 110, 0.2);
}

.button.ghost {
  border: 1px solid var(--line);
  color: var(--text);
  background: rgba(255, 255, 255, 0.55);
}

.hero-points {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  color: var(--muted);
}

.hero-points li {
  position: relative;
  padding-left: 18px;
}

.hero-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--green));
}

.hero-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 560px;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(8px);
}

.orb-a {
  width: 180px;
  height: 180px;
  top: 24px;
  right: 10px;
  background: rgba(255, 183, 77, 0.28);
}

.orb-b {
  width: 220px;
  height: 220px;
  left: 18px;
  bottom: 14px;
  background: rgba(47, 109, 246, 0.18);
}

.phone-frame {
  position: relative;
  width: min(100%, 390px);
  padding: 18px;
  border-radius: 40px;
  background: linear-gradient(180deg, #0d1834, #203155);
  box-shadow: 0 22px 60px rgba(16, 33, 63, 0.28);
}

.phone-notch {
  width: 34%;
  height: 26px;
  margin: 0 auto 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.09);
}

.screen {
  display: grid;
  gap: 14px;
  padding: 18px;
  border-radius: 28px;
  background:
    radial-gradient(circle at top right, rgba(116, 160, 255, 0.38), transparent 28%),
    linear-gradient(180deg, #eff5ff, #fdfefe);
}

.screen-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.screen-card {
  position: relative;
  padding: 16px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(98, 128, 176, 0.14);
}

.screen-card h3,
.screen-card p {
  margin: 0;
}

.screen-card p {
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.6;
  font-size: 0.92rem;
}

.weather-card {
  min-height: 160px;
}

.mood-card {
  min-height: 148px;
}

.tools-card {
  min-height: 148px;
}

.voice-card {
  display: flex;
  align-items: center;
  gap: 14px;
}

.card-tag {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(47, 109, 246, 0.1);
  color: var(--blue);
  font-size: 0.75rem;
  font-weight: 700;
}

.pulse {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 0 rgba(46, 188, 134, 0.45);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(46, 188, 134, 0.48);
  }
  70% {
    box-shadow: 0 0 0 16px rgba(46, 188, 134, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(46, 188, 134, 0);
  }
}

.section-heading {
  max-width: 760px;
}

.section-heading h2 {
  font-size: clamp(1.8rem, 4vw, 3.3rem);
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 30px;
}

.feature-card {
  min-height: 220px;
  padding: 24px;
  border-radius: 28px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
}

.feature-index {
  display: inline-block;
  margin-bottom: 18px;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.feature-card h3 {
  margin: 0;
  font-size: 1.4rem;
}

.feature-card p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.accent-blue {
  background: linear-gradient(180deg, rgba(225, 237, 255, 0.86), rgba(255, 255, 255, 0.88));
}

.accent-amber {
  background: linear-gradient(180deg, rgba(255, 243, 222, 0.92), rgba(255, 255, 255, 0.88));
}

.accent-green {
  background: linear-gradient(180deg, rgba(227, 250, 241, 0.92), rgba(255, 255, 255, 0.88));
}

.accent-pink {
  background: linear-gradient(180deg, rgba(255, 232, 240, 0.92), rgba(255, 255, 255, 0.88));
}

.scene-list {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.scene-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 18px;
  padding: 22px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.74);
}

.scene-time {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--blue);
}

.scene-body h3 {
  margin: 0;
  font-size: 1.18rem;
}

.scene-body p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.75;
}

.experience-panel {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 20px;
  margin-top: 28px;
}

.experience-copy,
.experience-metrics {
  padding: 26px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid var(--line);
}

.experience-copy h3 {
  margin: 0;
  font-size: 1.55rem;
}

.experience-list {
  margin: 20px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.8;
}

.experience-metrics {
  display: grid;
  gap: 16px;
}

.metric-card {
  padding: 22px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(245, 249, 255, 0.96), rgba(255, 255, 255, 0.9));
  border: 1px solid rgba(89, 115, 170, 0.15);
}

.metric-card strong {
  display: block;
  font-size: 1.26rem;
}

.metric-card span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
}

.download {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 24px;
  align-items: center;
}

.app-download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.app-download-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 132px;
  padding: 20px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.app-download-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(41, 71, 129, 0.12);
}

.app-download-card strong {
  font-size: 1.12rem;
}

.app-download-card span {
  color: var(--muted);
}

.app-platform {
  width: fit-content;
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
}

.app-download-card.ios .app-platform {
  color: var(--blue);
  background: rgba(47, 109, 246, 0.1);
}

.app-download-card.android .app-platform {
  color: #0f766e;
  background: rgba(46, 188, 134, 0.12);
}

.qr-card {
  padding: 26px;
  border-radius: 30px;
  background: linear-gradient(180deg, #fff, #f4f8ff);
  border: 1px solid var(--line);
  text-align: center;
}

.qr-frame {
  padding: 18px;
  border-radius: 22px;
  background: #fff;
  box-shadow: inset 0 0 0 1px rgba(77, 108, 171, 0.12);
}

.qr-frame img {
  width: 100%;
  display: block;
  border-radius: 12px;
}

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

.copy-toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 20;
  max-width: calc(100% - 40px);
  padding: 12px 16px;
  border-radius: 999px;
  background: rgba(18, 28, 45, 0.92);
  color: #fff;
  font-size: 0.92rem;
  line-height: 1.4;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 10px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.copy-toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  padding: 8px 4px 0;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 980px) {
  .hero,
  .experience-panel,
  .download {
    grid-template-columns: 1fr;
  }

  .hero-stage {
    min-height: auto;
  }

  .qr-card {
    max-width: 320px;
  }
}

@media (max-width: 760px) {
  .site-shell {
    width: min(100% - 20px, 1200px);
  }

  .topbar {
    top: 10px;
    border-radius: 24px;
    padding: 12px 14px;
  }

  .menu-toggle {
    display: inline-block;
  }

  .nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 18px;
    border-radius: 24px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow);
  }

  .nav.open {
    display: flex;
  }

  .hero,
  .feature-grid,
  .scenes,
  .experience,
  .download {
    padding: 22px;
    border-radius: 26px;
  }

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

  .scene-item {
    grid-template-columns: 1fr;
  }

  .screen-row {
    grid-template-columns: 1fr;
  }

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

  .app-download-grid {
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }
}