:root {
  --bg-color: #0f1115;
  --bg-light: #1a1d24;
  --text-main: #f0f2f5;
  --text-muted: #9ba1a6;
  --accent: #4ade80; /* 青果绿 */
  --accent-dark: #22c55e;
  --accent-glow: rgba(74, 222, 128, 0.3);
  --border-radius: 12px;
  --border-radius-lg: 24px;
  --max-width: 1200px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
section { padding: 80px 0; }
.text-center { text-align: center; }
h1, h2, h3 { color: #fff; line-height: 1.3; }
h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 16px; }
h2 { font-size: 2rem; margin-bottom: 24px; font-weight: 700; }
h3 { font-size: 1.25rem; margin-bottom: 12px; font-weight: 600; }
p { color: var(--text-muted); margin-bottom: 16px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 28px; border-radius: 999px;
  font-weight: 600; font-size: 1rem; cursor: pointer;
  transition: all 0.3s ease; border: none;
}
.btn-primary {
  background: var(--accent); color: #000;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-primary:hover {
  background: var(--accent-dark); transform: translateY(-2px);
}
.btn-outline {
  background: transparent; color: var(--accent);
  border: 2px solid var(--accent);
}
.btn-outline:hover {
  background: rgba(74, 222, 128, 0.1);
}

/* Header */
header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(15, 17, 21, 0.9); backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.nav-inner {
  display: flex; justify-content: space-between; align-items: center;
  height: 70px;
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 1.25rem; font-weight: 700; color: #fff; }
.brand img { height: 32px; border-radius: 8px; }
.nav-links { display: none; gap: 24px; font-size: 0.95rem; color: var(--text-muted); }
.nav-links a:hover { color: var(--accent); }
@media(min-width: 1024px) { .nav-links { display: flex; } }

/* Hero */
.hero {
  position: relative; padding: 100px 0 60px;
  background: radial-gradient(circle at top right, rgba(74, 222, 128, 0.1), transparent 40%),
              radial-gradient(circle at bottom left, rgba(74, 222, 128, 0.05), transparent 40%);
  text-align: center;
}
.hero-tag {
  display: inline-block; padding: 6px 16px; border-radius: 20px;
  background: rgba(74, 222, 128, 0.15); color: var(--accent);
  font-size: 0.875rem; font-weight: 600; margin-bottom: 24px;
}
.hero p { font-size: 1.125rem; max-width: 600px; margin: 0 auto 40px; }
.download-group { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; }
.hero-visual {
  margin-top: 60px;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
  max-width: 800px; margin-left: auto; margin-right: auto;
}
@media(min-width: 768px) {
  .hero-visual { grid-template-columns: repeat(4, 1fr); }
}
.hero-visual img {
  border-radius: var(--border-radius);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  transition: transform 0.3s ease;
}
.hero-visual img:hover { transform: scale(1.05); }

/* Section Generic */
.section-header { text-align: center; margin-bottom: 48px; }
.section-header p { max-width: 600px; margin: 0 auto; }

/* AI Drama Grid */
.drama-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
}
@media(min-width: 768px) { .drama-grid { grid-template-columns: repeat(3, 1fr); gap: 24px; } }
@media(min-width: 1024px) { .drama-grid { grid-template-columns: repeat(4, 1fr); } }
.drama-card {
  background: var(--bg-light); border-radius: var(--border-radius); overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.drama-card:hover { transform: translateY(-4px); box-shadow: 0 10px 20px rgba(0,0,0,0.3); }
.drama-img-wrap { position: relative; aspect-ratio: 3/4; overflow: hidden; }
.drama-img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.drama-info { padding: 12px; }
.drama-info h3 { font-size: 1rem; margin-bottom: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.drama-tags { display: flex; gap: 8px; margin-bottom: 8px; flex-wrap: wrap; }
.drama-tag { font-size: 0.7rem; padding: 2px 8px; border-radius: 4px; background: rgba(255,255,255,0.1); color: var(--text-muted); }
.drama-tag.highlight { background: rgba(74, 222, 128, 0.2); color: var(--accent); }
.drama-meta { display: flex; justify-content: space-between; font-size: 0.75rem; color: #666; }

/* Steps */
.steps-container { display: flex; flex-direction: column; gap: 24px; }
@media(min-width: 768px) { .steps-container { flex-direction: row; } }
.step-card {
  flex: 1; background: var(--bg-light); padding: 32px 24px; border-radius: var(--border-radius-lg);
  border: 1px solid rgba(255,255,255,0.05);
}
.step-num {
  width: 40px; height: 40px; border-radius: 50%; background: var(--accent);
  color: #000; display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem; font-weight: 800; margin-bottom: 20px;
}

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 16px; max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-light); border-radius: var(--border-radius); padding: 20px 24px;
}
.faq-q { font-weight: 600; font-size: 1.1rem; color: #fff; margin-bottom: 8px; display: flex; align-items: center; gap: 12px; }
.faq-q::before { content: 'Q'; color: var(--accent); font-weight: 800; font-size: 1.2rem; }
.faq-a { color: var(--text-muted); font-size: 0.95rem; padding-left: 28px; }
.faq-a::before { content: 'A'; color: #666; font-weight: 800; font-size: 1.2rem; margin-right: 12px; float: left; margin-left: -28px;}

/* Reviews */
.review-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media(min-width: 768px) { .review-grid { grid-template-columns: repeat(2, 1fr); } }
.review-card {
  background: var(--bg-light); padding: 24px; border-radius: var(--border-radius);
  position: relative;
}
.review-card::before {
  content: '“'; position: absolute; top: 10px; right: 20px;
  font-size: 4rem; color: rgba(255,255,255,0.05); font-family: serif; line-height: 1;
}
.review-user { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.review-avatar { width: 40px; height: 40px; border-radius: 50%; background: #333; display: flex; align-items: center; justify-content: center; font-weight: bold; color: var(--accent); }
.review-name { font-weight: 600; color: #fff; font-size: 0.95rem; }
.review-text { font-size: 0.95rem; color: var(--text-muted); }

/* Privacy & Creator & Community */
.two-col { display: grid; grid-template-columns: 1fr; gap: 40px; }
@media(min-width: 768px) { .two-col { grid-template-columns: 1fr 1fr; } }
.feature-list { list-style: none; }
.feature-list li { margin-bottom: 16px; display: flex; gap: 12px; align-items: flex-start; color: var(--text-muted); }
.feature-list li::before { content: '✓'; color: var(--accent); font-weight: bold; }

/* Footer */
footer {
  border-top: 1px solid rgba(255,255,255,0.05); padding: 40px 0; text-align: center;
  font-size: 0.85rem; color: #666;
}
footer p { margin-bottom: 8px; }
footer a { color: #888; transition: color 0.3s; }
footer a:hover { color: var(--accent); }
.footer-time { font-size: 0.8rem; color: #555; }