:root {
  --bg-dark: #0a0a0f;
  --bg-card: #15151d;
  --bg-card-hover: #1d1d28;
  --primary: #d4a843;
  --primary-light: #f0c96a;
  --text-main: #e8e8ed;
  --text-sub: #9a9aa8;
  --border: #2a2a35;
  --radius: 12px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--primary-light);
}
.brand img { height: 32px; width: auto; border-radius: 8px; }
.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  font-size: 15px;
  color: var(--text-sub);
}
.nav-links li { cursor: pointer; transition: color 0.2s; }
.nav-links li:hover { color: var(--primary-light); }

/* Hero */
.hero {
  position: relative;
  padding: 90px 0 80px;
  background: radial-gradient(ellipse at 30% 20%, #1f1a10 0%, transparent 60%),
              radial-gradient(ellipse at 80% 80%, #1a1a28 0%, transparent 55%),
              var(--bg-dark);
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: repeating-linear-gradient(90deg, transparent, transparent 80px, rgba(212,168,67,0.03) 80px, rgba(212,168,67,0.03) 81px);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 1; max-width: 800px; }
.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--primary);
  color: var(--primary-light);
  border-radius: 999px;
  font-size: 13px;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: 42px;
  line-height: 1.3;
  margin-bottom: 20px;
  color: #fff;
  letter-spacing: 1px;
}
.hero h1 span { color: var(--primary-light); }
.hero-desc {
  font-size: 17px;
  color: var(--text-sub);
  margin-bottom: 36px;
  max-width: 640px;
}
.download-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-download:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(212,168,67,0.25); }
.btn-android {
  background: linear-gradient(135deg, #d4a843, #b8892a);
  color: #0a0a0f;
}
.btn-ios {
  background: linear-gradient(135deg, #2a2a35, #1a1a22);
  border: 1px solid var(--border);
  color: var(--text-main);
}
.btn-icon { font-size: 22px; line-height: 1; }

/* Section common */
section { padding: 80px 0; }
.section-head { margin-bottom: 48px; }
.section-head h2 {
  font-size: 32px;
  color: #fff;
  margin-bottom: 12px;
}
.section-head p { color: var(--text-sub); font-size: 16px; max-width: 700px; }
.section-label {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--primary);
  margin-bottom: 12px;
  text-transform: uppercase;
}

/* Hot Section */
.hot-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.hot-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: transform 0.3s, border-color 0.3s;
}
.hot-card:hover { transform: translateY(-6px); border-color: var(--primary); }
.hot-poster { aspect-ratio: 3/4; overflow: hidden; }
.hot-poster img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.hot-card:hover .hot-poster img { transform: scale(1.05); }
.hot-info { padding: 14px 12px; }
.hot-title { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hot-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.hot-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(212,168,67,0.12);
  color: var(--primary-light);
}
.hot-desc { font-size: 12px; color: var(--text-sub); line-height: 1.5; margin-bottom: 8px; }
.hot-date { font-size: 11px; color: #6a6a78; }

/* AI Section */
.ai-section { background: linear-gradient(180deg, var(--bg-dark), #12121a); }
.ai-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ai-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 28px;
  border: 1px solid var(--border);
  border-top: 3px solid var(--primary);
}
.ai-card h3 { font-size: 20px; color: #fff; margin-bottom: 12px; }
.ai-card p { font-size: 15px; color: var(--text-sub); }
.ai-card .ai-num {
  font-size: 40px;
  font-weight: 800;
  color: rgba(212,168,67,0.18);
  line-height: 1;
  margin-bottom: 16px;
}

/* Steps Section */
.steps-section { background: #0c0c12; }
.steps-wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.step-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 22px;
  border: 1px solid var(--border);
  position: relative;
}
.step-num {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #d4a843, #b8892a);
  color: #0a0a0f;
  font-weight: 800;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.step-item h3 { font-size: 17px; color: #fff; margin-bottom: 10px; }
.step-item p { font-size: 14px; color: var(--text-sub); }

/* FAQ & Reviews two-column */
.qa-section { background: var(--bg-dark); }
.qa-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.qa-col h2 { font-size: 26px; color: #fff; margin-bottom: 24px; }
.qa-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 14px;
  border: 1px solid var(--border);
}
.qa-q { font-weight: 600; color: var(--primary-light); margin-bottom: 8px; font-size: 15px; }
.qa-a { color: var(--text-sub); font-size: 14px; }

/* Privacy */
.privacy-section { background: #0c0c12; }
.privacy-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.privacy-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px 22px;
  border-left: 3px solid var(--primary);
}
.privacy-item h3 { font-size: 16px; color: #fff; margin-bottom: 6px; }
.privacy-item p { font-size: 14px; color: var(--text-sub); }

/* Creator & Community */
.creator-section { background: linear-gradient(180deg, #12121a, var(--bg-dark)); }
.creator-grid, .community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.creator-card, .community-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 26px 22px;
  border: 1px solid var(--border);
}
.creator-card h3, .community-card h3 { font-size: 17px; color: var(--primary-light); margin-bottom: 10px; }
.creator-card p, .community-card p { font-size: 14px; color: var(--text-sub); }

/* Download CTA */
.download-cta {
  background: radial-gradient(ellipse at center, rgba(212,168,67,0.12) 0%, transparent 70%), #0a0a0f;
  text-align: center;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.download-cta h2 { font-size: 32px; color: #fff; margin-bottom: 16px; }
.download-cta > .container > p { color: var(--text-sub); margin-bottom: 36px; max-width: 600px; margin-left: auto; margin-right: auto; }
.download-cta .download-btns { justify-content: center; margin-bottom: 40px; }
.install-note {
  max-width: 760px;
  margin: 0 auto;
  text-align: left;
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border);
}
.install-note h3 { font-size: 18px; color: var(--primary-light); margin-bottom: 14px; text-align: center; }
.install-note ol { padding-left: 20px; color: var(--text-sub); font-size: 14px; }
.install-note li { margin-bottom: 8px; }

/* Footer */
.site-footer {
  padding: 36px 0 28px;
  border-top: 1px solid var(--border);
  text-align: center;
}
.site-footer p { font-size: 12px; color: #5a5a68; margin-bottom: 8px; }
.site-footer a { color: #6a6a78; }
.site-footer a:hover { color: var(--primary); }
.site-footer time { font-size: 12px; color: #5a5a68; }

/* Responsive */
@media (max-width: 1024px) {
  .hot-grid { grid-template-columns: repeat(3, 1fr); }
  .ai-grid, .creator-grid, .community-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-wrap { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 34px; }
  .nav-links { gap: 18px; font-size: 14px; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hot-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-grid, .creator-grid, .community-grid, .qa-grid, .privacy-list { grid-template-columns: 1fr; }
  .steps-wrap { grid-template-columns: 1fr; }
  .hero { padding: 60px 0 50px; }
  .hero h1 { font-size: 28px; }
  .hero-desc { font-size: 15px; }
  .section-head h2 { font-size: 24px; }
  section { padding: 56px 0; }
  .btn-download { width: 100%; justify-content: center; }
  .download-btns { flex-direction: column; }
}