:root {
  --bg: #0f0f13;
  --surface: #191922;
  --surface-2: #232330;
  --primary: #ffd633;
  --primary-dark: #ccaa1f;
  --text: #f2f2f5;
  --text-muted: #9a9aa8;
  --border: #2e2e3d;
  --accent: #ff5959;
  --radius: 16px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(15, 15, 19, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between; height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { height: 32px; width: auto; border-radius: 6px; }
.brand-text { font-size: 20px; font-weight: 700; letter-spacing: 1px; color: var(--primary); }
.nav-links { display: flex; gap: 20px; font-size: 14px; color: var(--text-muted); overflow-x: auto; }
.nav-links a:hover { color: var(--primary); }
.nav-download {
  background: var(--primary); color: #111; padding: 8px 16px; border-radius: 20px;
  font-size: 14px; font-weight: 600; white-space: nowrap;
}

/* Hero */
.hero-section {
  padding: 80px 20px 60px;
  background: radial-gradient(circle at 80% 20%, rgba(255, 214, 51, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 20% 80%, rgba(255, 89, 89, 0.1) 0%, transparent 50%);
  text-align: center;
  position: relative;
}
.hero-section::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.hero-tag {
  display: inline-block; background: rgba(255, 214, 51, 0.1); color: var(--primary);
  padding: 6px 16px; border-radius: 20px; font-size: 13px; margin-bottom: 24px;
  border: 1px solid rgba(255, 214, 51, 0.3);
}
.hero-title {
  font-size: 42px; line-height: 1.2; margin-bottom: 20px; color: #fff;
}
.hero-title span { color: var(--primary); }
.hero-desc {
  max-width: 600px; margin: 0 auto 40px; color: var(--text-muted); font-size: 16px;
}
.hero-download-group {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; margin-bottom: 40px;
}
.download-btn {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 28px; border-radius: 12px; font-size: 15px; font-weight: 600;
  transition: transform 0.2s, opacity 0.2s;
}
.download-btn:hover { transform: translateY(-2px); opacity: 0.9; }
.btn-ios { background: #fff; color: #111; }
.btn-android { background: var(--primary); color: #111; }
.btn-other { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-icon { font-size: 20px; }

.hero-visual {
  max-width: 1000px; margin: 0 auto; display: grid;
  grid-template-columns: repeat(3, 1fr); gap: 20px; padding: 20px;
}
.phone-mockup {
  background: var(--surface); border-radius: 24px; border: 4px solid var(--border);
  overflow: hidden; aspect-ratio: 9/16;
}
.phone-mockup img { width: 100%; height: 100%; object-fit: cover; }

/* Sections Common */
.section-container { max-width: 1200px; margin: 0 auto; padding: 80px 20px; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-title { font-size: 32px; margin-bottom: 12px; color: #fff; }
.section-subtitle { color: var(--text-muted); font-size: 15px; }

/* AI Short Drama */
.ai-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
.drama-card {
  background: var(--surface); border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); transition: transform 0.2s;
}
.drama-card:hover { transform: translateY(-4px); border-color: var(--primary-dark); }
.drama-img { width: 100%; aspect-ratio: 3/4; object-fit: cover; }
.drama-info { padding: 16px; }
.drama-title { font-size: 16px; font-weight: 600; margin-bottom: 8px; color: #fff; }
.drama-meta { font-size: 12px; color: var(--text-muted); margin-bottom: 12px; display: flex; justify-content: space-between; }
.drama-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.drama-tag {
  font-size: 11px; padding: 2px 8px; border-radius: 4px;
  background: rgba(255, 214, 51, 0.1); color: var(--primary);
  border: 1px solid rgba(255, 214, 51, 0.2);
}

/* Hot List */
.hot-section { background: var(--surface); border-radius: 24px; padding: 40px; margin-top: 80px; }
.hot-list { display: flex; flex-direction: column; gap: 16px; }
.hot-item {
  display: flex; align-items: center; gap: 20px;
  background: var(--surface-2); padding: 16px 24px; border-radius: 12px;
}
.hot-rank { font-size: 24px; font-weight: 800; color: var(--primary); width: 40px; }
.hot-rank.top { color: var(--accent); font-size: 28px; }
.hot-info { flex: 1; }
.hot-name { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.hot-score-tag {
  background: rgba(255, 89, 89, 0.15); color: var(--accent);
  padding: 4px 10px; border-radius: 6px; font-size: 13px; font-weight: 600;
}

/* Install Steps */
.steps-container {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  position: relative;
}
.step-card {
  background: var(--surface-2); padding: 32px 24px; border-radius: var(--radius);
  position: relative; text-align: center;
}
.step-num {
  width: 48px; height: 48px; background: var(--primary); color: #111;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800; margin: 0 auto 20px;
}
.step-title { font-size: 18px; margin-bottom: 12px; }
.step-desc { font-size: 14px; color: var(--text-muted); }

/* FAQ / Privacy */
.faq-section { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 80px; }
.faq-column h3 { font-size: 22px; margin-bottom: 24px; color: var(--primary); }
.faq-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; margin-bottom: 12px; overflow: hidden;
}
.faq-item summary {
  padding: 16px 20px; font-size: 15px; font-weight: 500; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: 20px; color: var(--text-muted); }
.faq-item[open] summary::after { content: '-'; color: var(--primary); }
.faq-item p { padding: 0 20px 16px; font-size: 14px; color: var(--text-muted); }

/* Reviews */
.review-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.review-card {
  background: var(--surface); padding: 28px; border-radius: var(--radius);
  border: 1px solid var(--border);
}
.review-user { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.avatar { width: 40px; height: 40px; background: var(--surface-2); border-radius: 50%; }
.review-name { font-weight: 600; font-size: 14px; }
.review-text { font-size: 14px; color: var(--text-muted); margin-bottom: 16px; }
.review-reply { font-size: 13px; color: var(--primary); background: rgba(255, 214, 51, 0.05); padding: 12px; border-radius: 8px; border-left: 3px solid var(--primary); }

/* Creator & Community */
.split-section { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 80px; }
.info-panel {
  background: linear-gradient(135deg, var(--surface) 0%, var(--surface-2) 100%);
  padding: 40px; border-radius: 24px; border: 1px solid var(--border);
}
.info-panel h3 { font-size: 24px; margin-bottom: 20px; }
.info-panel p { color: var(--text-muted); margin-bottom: 24px; font-size: 15px; }
.info-list li { margin-bottom: 12px; font-size: 14px; display: flex; align-items: center; gap: 10px; }
.info-list li::before { content: '▪'; color: var(--primary); }

/* Final Download */
.final-download-section {
  background: radial-gradient(circle at center, rgba(255, 214, 51, 0.15) 0%, transparent 60%);
  padding: 100px 20px; text-align: center;
  border-top: 1px solid var(--border);
}
.final-download-title { font-size: 36px; margin-bottom: 20px; }
.final-download-desc { color: var(--text-muted); margin-bottom: 40px; max-width: 600px; margin-left: auto; margin-right: auto; }
.install-reminder {
  background: var(--surface); display: inline-block; padding: 16px 32px;
  border-radius: 12px; font-size: 14px; margin-bottom: 40px; border: 1px solid var(--border);
  text-align: left;
}
.install-reminder strong { color: var(--primary); }

/* Gallery */
.gallery-scroll {
  display: flex; gap: 16px; overflow-x: auto; padding-bottom: 20px;
  scrollbar-width: thin; scrollbar-color: var(--primary) var(--surface);
}
.gallery-scroll::-webkit-scrollbar { height: 6px; }
.gallery-scroll::-webkit-scrollbar-track { background: var(--surface); border-radius: 3px; }
.gallery-scroll::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }
.gallery-img { width: 160px; flex-shrink: 0; border-radius: 10px; aspect-ratio: 3/4; object-fit: cover; }

/* Footer */
.site-footer {
  padding: 40px 20px; border-top: 1px solid var(--border);
  text-align: center; font-size: 13px; color: var(--text-muted);
}
.site-footer p { margin-bottom: 8px; }
.site-footer a { color: var(--text-muted); text-decoration: underline; }
.time-text { font-size: 12px; opacity: 0.6; }

/* Media Queries */
@media (max-width: 1024px) {
  .hero-title { font-size: 34px; }
  .steps-container { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
  .faq-section, .split-section { grid-template-columns: 1fr; }
  .hero-visual { grid-template-columns: repeat(2, 1fr); }
  .hot-section { padding: 24px; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero-title { font-size: 28px; }
  .hero-download-group { flex-direction: column; align-items: stretch; }
  .ai-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .steps-container { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .hero-visual { grid-template-columns: 1fr; max-width: 300px; margin: 0 auto; }
  .phone-mockup { display: none; }
  .phone-mockup:first-child { display: block; }
  .hot-item { flex-wrap: wrap; gap: 12px; }
  .section-container { padding: 60px 20px; }
}