:root {
  --page-bg: #0a0c14;
  --surface: #111827;
  --surface-2: #121521;
  --glass: rgba(18, 21, 33, 0.55);
  --border: rgba(255, 255, 255, 0.08);
  --text: #f8fafc;
  --text-secondary: #cbd5e1;
  --muted: #94a3b8;
  --cyan: #00f0ff;
  --purple: #8a2be2;
  --green: #34d399;
  --gold: #eab308;
  --radius: 20px;
  --radius-sm: 12px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --max: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--page-bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

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

.ambient {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
}

.ambient-cyan {
  width: 420px;
  height: 420px;
  background: var(--cyan);
  top: -120px;
  right: -80px;
}

.ambient-purple {
  width: 360px;
  height: 360px;
  background: var(--purple);
  bottom: 10%;
  left: -100px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  backdrop-filter: blur(16px);
  background: rgba(10, 12, 20, 0.72);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-mark {
  filter: drop-shadow(0 0 12px rgba(0, 240, 255, 0.35));
}

.nav-links {
  display: none;
  gap: 28px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color 0.2s;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-toggle {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.lang-toggle:hover {
  border-color: rgba(0, 240, 255, 0.4);
  color: var(--cyan);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--cyan), #0080ff);
  color: #041018;
  padding: 14px 28px;
  box-shadow: 0 8px 32px rgba(0, 240, 255, 0.25);
}

.btn-primary:hover {
  box-shadow: 0 12px 40px rgba(0, 240, 255, 0.35);
}

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
  padding: 14px 28px;
  background: rgba(255, 255, 255, 0.03);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.875rem;
}

main {
  position: relative;
  z-index: 1;
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 56px 24px 80px;
  display: grid;
  gap: 48px;
  align-items: center;
}

.hero-copy h1 {
  margin: 12px 0 20px;
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.gradient-text {
  background: linear-gradient(90deg, var(--cyan), var(--green));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.eyebrow {
  color: var(--cyan);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0;
}

.hero-desc,
.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 540px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 36px;
}

.hero-stats {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
}

.hero-stats li {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--glass);
}

.hero-stats strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.hero-stats span {
  color: var(--muted);
  font-size: 0.85rem;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  min-height: 420px;
}

.phone-frame {
  position: relative;
  z-index: 2;
  width: min(100%, 300px);
  padding: 12px;
  border-radius: 36px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
}

.phone-notch {
  width: 96px;
  height: 24px;
  margin: 0 auto 8px;
  border-radius: 0 0 16px 16px;
  background: #000;
}

.phone-screen {
  width: 100%;
  border-radius: 24px;
  overflow: hidden;
}

.shot-card > [data-mock],
.shot-card > .mock-phone {
  display: block;
  width: 100%;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 40px 24px 72px;
}

.section-head {
  margin-bottom: 40px;
}

.section-head h2 {
  margin: 8px 0 12px;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  letter-spacing: -0.02em;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.feature-card {
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
  transition: border-color 0.25s, transform 0.25s;
}

.feature-card:hover {
  border-color: rgba(0, 240, 255, 0.25);
  transform: translateY(-4px);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}

.feature-icon.cyan {
  background: rgba(0, 240, 255, 0.12);
  color: var(--cyan);
}

.feature-icon.purple {
  background: rgba(138, 43, 226, 0.15);
  color: #b794f6;
}

.feature-icon.green {
  background: rgba(52, 211, 153, 0.15);
  color: var(--green);
}

.feature-icon.gold {
  background: rgba(234, 179, 8, 0.15);
  color: var(--gold);
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
}

.feature-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.shot-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.shot-card {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.shot-card > [data-mock]:empty {
  min-height: 420px;
  background: var(--surface-2);
}

.shot-card figcaption {
  padding: 16px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.shot-card figcaption strong {
  font-size: 1rem;
}

.shot-card figcaption span {
  color: var(--muted);
  font-size: 0.875rem;
}

.highlight-band {
  max-width: none;
  padding-left: 0;
  padding-right: 0;
}

.highlight-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
  border-block: 1px solid var(--border);
  background: linear-gradient(90deg, rgba(0, 240, 255, 0.06), rgba(138, 43, 226, 0.06));
}

.highlight-icon {
  flex-shrink: 0;
}

.highlight-inner h2 {
  margin: 0 0 12px;
  font-size: 1.75rem;
}

.highlight-inner p {
  margin: 0;
  color: var(--text-secondary);
  max-width: 560px;
}

.download-card {
  display: grid;
  gap: 32px;
  padding: 40px;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid var(--border);
  background: linear-gradient(145deg, rgba(17, 24, 39, 0.95), rgba(18, 21, 33, 0.85));
  box-shadow: var(--shadow);
}

.download-copy h2 {
  margin: 8px 0 12px;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.download-copy p {
  color: var(--text-secondary);
}

.store-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 16px;
}

.store-btn {
  min-width: 160px;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: border-color 0.2s, background 0.2s;
}

.store-btn-primary {
  min-width: 220px;
  border-color: rgba(0, 240, 255, 0.35);
  background: rgba(0, 240, 255, 0.08);
}

.store-btn-primary:hover {
  background: rgba(0, 240, 255, 0.14);
  box-shadow: 0 8px 28px rgba(0, 240, 255, 0.15);
}

.store-btn:hover {
  border-color: rgba(0, 240, 255, 0.35);
  background: rgba(0, 240, 255, 0.06);
}

.store-label {
  font-weight: 700;
}

.store-sub {
  font-size: 0.8rem;
  color: var(--muted);
}

.download-note {
  font-size: 0.85rem;
  color: var(--muted);
}

.download-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-visual .app-logo-wrap--lg {
  box-shadow: 0 20px 60px rgba(0, 240, 255, 0.15);
}

.site-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 48px 24px 56px;
  border-top: 1px solid var(--border);
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  margin-bottom: 8px;
}

.footer-tagline {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 12px;
}

.footer-copy {
  color: var(--muted);
  font-size: 0.8rem;
  margin: 0;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }

  .hero {
    grid-template-columns: 1fr 1fr;
    padding-top: 72px;
  }

  .highlight-inner {
    flex-direction: row;
    text-align: left;
  }

  .download-card {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    padding: 48px;
  }
}