:root {
  --bg-dark: #0f0c15;
  --bg-card: #191421;
  --bg-card-hover: #221a2d;
  --primary: #ff2a5f;
  --primary-glow: rgba(255, 42, 95, 0.4);
  --secondary: #a855f7;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --border: #2d2538;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; object-fit: cover; }

/* 布局基础 */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section-padding { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-title { font-size: 32px; font-weight: 800; margin-bottom: 16px; letter-spacing: 1px; }
.section-desc { color: var(--text-muted); font-size: 16px; max-width: 600px; margin: 0 auto; }
.text-gradient { background: linear-gradient(90deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

/* 顶部导航 */
header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
  background: rgba(15, 12, 21, 0.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; justify-content: space-between; align-items: center; height: 70px; }
.logo-link { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; }
.logo-link img { height: 32px; width: auto; border-radius: 6px; }
.nav-links { display: none; gap: 24px; font-size: 14px; color: var(--text-muted); }
.nav-links a:hover { color: var(--text-main); }
.nav-btn { background: var(--primary); color: #fff; padding: 8px 20px; border-radius: 20px; font-size: 14px; font-weight: 600; box-shadow: 0 4px 15px var(--primary-glow); transition: 0.3s; }
.nav-btn:hover { transform: translateY(-2px); }

/* 首屏 Hero */
.hero { padding-top: 140px; padding-bottom: 80px; text-align: center; position: relative; overflow: hidden; }
.hero::before {
  content: ''; position: absolute; top: -20%; left: 50%; transform: translateX(-50%);
  width: 600px; height: 600px; background: radial-gradient(circle, rgba(168,85,247,0.15) 0%, transparent 70%); z-index: -1;
}
.hero h1 { font-size: 42px; line-height: 1.2; margin-bottom: 20px; font-weight: 900; }
.hero p { color: var(--text-muted); font-size: 18px; max-width: 700px; margin: 0 auto 40px; }
.download-group { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; margin-bottom: 60px; }
.btn-dl {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--bg-card); border: 1px solid var(--border); color: var(--text-main);
  padding: 14px 28px; border-radius: 30px; font-size: 16px; font-weight: 600; transition: 0.3s; min-width: 160px;
}
.btn-dl:hover { background: var(--bg-card-hover); border-color: var(--primary); transform: translateY(-2px); }
.btn-dl.primary { background: linear-gradient(135deg, var(--primary), #e11d48); border: none; box-shadow: 0 8px 25px var(--primary-glow); }
.btn-dl.primary:hover { box-shadow: 0 12px 30px var(--primary-glow); }
.btn-dl svg { width: 20px; height: 20px; fill: currentColor; }

/* 短剧展示 */
.poster-wall { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; padding: 20px 0; }
.poster-card {
  background: var(--bg-card); border-radius: var(--radius-md); overflow: hidden;
  border: 1px solid var(--border); transition: 0.3s; display: flex; flex-direction: column;
}
.poster-card:hover { transform: translateY(-4px); border-color: var(--primary); box-shadow: 0 10px 30px rgba(0,0,0,0.5); }
.poster-img-wrap { position: relative; aspect-ratio: 3/4; width: 100%; background: #2a2233; }
.poster-img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.poster-tag {
  position: absolute; top: 10px; right: 10px; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
  color: #fff; font-size: 12px; padding: 4px 8px; border-radius: 4px; border: 1px solid rgba(255,255,255,0.1);
}
.poster-info { padding: 12px; flex: 1; display: flex; flex-direction: column; justify-content: space-between; }
.poster-title { font-size: 16px; font-weight: 700; margin-bottom: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.poster-desc { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.poster-meta { font-size: 12px; color: #6b7280; display: flex; justify-content: space-between; }

/* 安装步骤 */
.steps-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
.step-card {
  background: var(--bg-card); padding: 30px; border-radius: var(--radius-md);
  border: 1px solid var(--border); position: relative; overflow: hidden;
}
.step-num { font-size: 48px; font-weight: 900; color: var(--border); position: absolute; right: 20px; top: 10px; line-height: 1; z-index: 0; }
.step-content { position: relative; z-index: 1; }
.step-content h3 { font-size: 20px; margin-bottom: 10px; color: var(--text-main); }
.step-content p { color: var(--text-muted); font-size: 15px; }

/* 常见问题 & 隐私安全 (问答风) */
.faq-list { display: flex; flex-direction: column; gap: 16px; }
.faq-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; }
.faq-q { padding: 20px; font-weight: 700; font-size: 16px; display: flex; justify-content: space-between; align-items: center; cursor: pointer; }
.faq-q::after { content: '+'; font-size: 20px; color: var(--primary); }
.faq-a { padding: 0 20px 20px; color: var(--text-muted); font-size: 15px; }

/* 用户热评 */
.reviews-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.review-card {
  background: var(--bg-card); padding: 20px; border-radius: var(--radius-md);
  border: 1px solid var(--border); display: flex; gap: 16px;
}
.review-avatar {
  width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex; align-items: center; justify-content: center; font-weight: bold; color: #fff; flex-shrink: 0;
}
.review-content h4 { font-size: 15px; margin-bottom: 4px; }
.review-content p { font-size: 14px; color: var(--text-muted); }

/* 创作者计划 & 交流社区 */
.feature-box {
  background: linear-gradient(135deg, #1f1828, #140f1a); padding: 40px; border-radius: var(--radius-lg);
  border: 1px solid var(--border); text-align: center;
}
.feature-list { margin: 30px 0; display: flex; flex-direction: column; gap: 16px; text-align: left; }
.feature-list li { display: flex; align-items: flex-start; gap: 12px; font-size: 15px; color: var(--text-muted); }
.feature-list li::before { content: '✦'; color: var(--primary); font-size: 18px; line-height: 1; }

/* 客户端下载 */
.download-section { background: var(--bg-card); border-top: 1px solid var(--border); text-align: center; }
.download-section p { margin-bottom: 30px; color: var(--text-muted); }
.footer-bottom { border-top: 1px solid var(--border); padding: 30px 0; text-align: center; color: var(--text-muted); font-size: 13px; }
.footer-time { margin-top: 10px; font-size: 12px; color: #4b5563; }

/* 响应式 */
@media (min-width: 768px) {
  .nav-links { display: flex; }
  .hero h1 { font-size: 56px; }
  .poster-wall { grid-template-columns: repeat(3, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-bottom { display: flex; justify-content: space-between; align-items: center; text-align: left; }
}
@media (min-width: 1024px) {
  .poster-wall { grid-template-columns: repeat(4, 1fr); }
  .steps-grid { grid-template-columns: repeat(4, 1fr); }
  .reviews-grid { grid-template-columns: repeat(3, 1fr); }
  .faq-container { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
}