:root {
  --bg: #0b0b0b;
  --neon: #d7ff3f;
  --orange: #ff5a28;
  --cream: #f5f1e7;
  --text: #f5f1e7;
  --muted: #a3a3a3;
  --max-w: 1160px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  background-color: var(--bg);
  color: var(--text);
  font-family: "Arial Black", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  padding-bottom: 60px;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; object-fit: cover; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 20px; position: relative; }

/* 左侧导航 */
.side-nav {
  position: fixed; left: 0; top: 50%; transform: translateY(-50%);
  z-index: 100; display: flex; flex-direction: column; gap: 12px;
  padding-left: 20px;
}
.side-nav a {
  display: flex; align-items: center; gap: 10px;
  font-family: monospace; font-size: 1.1rem; font-weight: 900;
  color: rgba(245, 241, 231, 0.35); transition: color 0.3s;
  text-transform: uppercase;
}
.side-nav a .num {
  font-size: 2.2rem; -webkit-text-stroke: 1px rgba(245, 241, 231, 0.3);
  color: transparent; transition: all 0.3s;
}
.side-nav a:hover, .side-nav a.active { color: var(--neon); }
.side-nav a:hover .num, .side-nav a.active .num {
  -webkit-text-stroke: 1px var(--neon); color: var(--neon);
}

/* 顶部 Logo */
.top-bar { padding: 20px; border-bottom: 1px solid #222; }
.logo-wrap { display: flex; align-items: center; gap: 12px; }
.logo-wrap img { height: 32px; width: auto; border-radius: 6px; }
.logo-text { font-size: 1.2rem; font-weight: 900; color: var(--neon); }

/* 板块通用 */
section { padding: 80px 0; border-bottom: 1px dashed #333; position: relative; }
.section-tag {
  display: inline-block; font-family: monospace; font-size: 0.9rem;
  color: var(--orange); border: 1px solid var(--orange);
  padding: 2px 8px; margin-bottom: 20px; font-weight: bold;
}
.section-title { font-size: 2.4rem; font-weight: 900; margin-bottom: 16px; color: var(--neon); }
.section-desc { font-size: 1.1rem; color: var(--muted); margin-bottom: 40px; max-width: 700px; }

/* 首屏居中舞台 */
.hero { text-align: center; padding-top: 100px; min-height: 80vh; display: flex; flex-direction: column; justify-content: center; align-items: center; }
.hero h1 { font-size: 4rem; font-weight: 900; line-height: 1.1; margin-bottom: 20px; color: var(--cream); }
.hero h1 span { color: var(--neon); }
.hero p { font-size: 1.2rem; margin-bottom: 30px; color: var(--muted); }
.hero-actions { margin-bottom: 50px; }
.btn-download {
  display: inline-block; background: var(--orange); color: var(--cream);
  padding: 16px 40px; font-size: 1.2rem; font-weight: 900;
  border: 2px solid var(--cream); box-shadow: 4px 4px 0 var(--neon);
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-download:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--neon); }
.hero-img { width: 100%; max-width: 800px; margin: 0 auto; border: 2px solid var(--neon); box-shadow: 8px 8px 0 var(--orange); border-radius: 12px; overflow: hidden; }
.hero-img img { width: 100%; aspect-ratio: 16/9; }

/* 套路对照 */
.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.compare-card { background: #111; border: 2px solid #444; padding: 24px; }
.compare-card h3 { font-size: 1.4rem; color: var(--orange); margin-bottom: 12px; }
.compare-card p { font-size: 1rem; }
.compare-card.old { opacity: 0.6; border-color: #333; }
.compare-card.old h3 { color: #888; }
.compare-card.new { border-color: var(--neon); box-shadow: 4px 4px 0 var(--neon); }
.compare-card.new h3 { color: var(--neon); }

/* 片单 */
.playlist-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.poster-card { background: #111; border: 2px solid #333; transition: transform 0.2s; }
.poster-card:hover { transform: translateY(-4px); }
.poster-card .img-box { width: 100%; aspect-ratio: 3/4; overflow: hidden; border-bottom: 2px solid #333; }
.poster-card .img-box img { width: 100%; height: 100%; }
.poster-card .info { padding: 16px; }
.poster-card .info h3 { font-size: 1.1rem; color: var(--cream); margin-bottom: 8px; }
.poster-card .info p { font-size: 0.9rem; color: var(--muted); }

/* 标签筛选 */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 12px; }
.tag { border: 1px solid var(--neon); color: var(--neon); padding: 8px 20px; border-radius: 30px; font-size: 1rem; font-weight: bold; }
.tag.bg-orange { background: var(--orange); border-color: var(--orange); color: var(--cream); }
.tag.bg-cream { background: var(--cream); border-color: var(--cream); color: var(--bg); }

/* 数据 */
.stats-row { display: flex; justify-content: space-around; text-align: center; flex-wrap: wrap; gap: 20px; }
.stat-item { flex: 1; min-width: 200px; }
.stat-item .num { font-size: 3rem; color: var(--orange); font-family: monospace; font-weight: 900; line-height: 1; margin-bottom: 10px; }
.stat-item .label { font-size: 1rem; color: var(--muted); }

/* 留言 */
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.review-card { background: #1a1a1a; padding: 24px; border-left: 4px solid var(--neon); }
.review-card p { font-style: italic; margin-bottom: 16px; font-size: 1rem; }
.review-card .user { font-weight: bold; color: var(--orange); }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 16px; }
.faq-item { background: #111; border: 1px solid #333; padding: 20px; }
.faq-item h3 { font-size: 1.2rem; color: var(--neon); margin-bottom: 8px; }
.faq-item p { color: var(--muted); font-size: 1rem; }

/* 下载区 */
.download-section { text-align: center; background: #111; border-top: 4px solid var(--neon); border-bottom: none; padding: 100px 0; }
.download-section h2 { font-size: 3rem; margin-bottom: 20px; color: var(--cream); }
.download-section p { color: var(--muted); margin-bottom: 40px; }

/* 页脚 */
footer { padding: 40px 20px; text-align: center; font-size: 0.8rem; color: #666; background: #050505; }
footer p { margin-bottom: 8px; }
footer a { color: #888; text-decoration: underline; }

/* 响应式 */
@media (max-width: 1024px) {
  .side-nav { display: none; }
  .container { padding: 0 16px; }
  .hero h1 { font-size: 3rem; }
  .playlist-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: 1fr; }
  .compare-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  body { padding-bottom: 70px; }
  .hero h1 { font-size: 2.2rem; }
  .section-title { font-size: 1.8rem; }
  .playlist-grid { grid-template-columns: 1fr; }
  .stats-row { flex-direction: column; }

  /* 手机底部导航 */
  .side-nav.mobile-nav {
    display: flex; flex-direction: row; position: fixed;
    left: 0; right: 0; bottom: 0; top: auto; transform: none;
    padding: 0; background: #111; border-top: 2px solid var(--neon);
    overflow-x: auto; white-space: nowrap; gap: 0; z-index: 999;
    justify-content: flex-start;
  }
  .side-nav.mobile-nav a {
    flex: 0 0 auto; padding: 12px 16px; font-size: 0.9rem;
    flex-direction: row; align-items: center; gap: 4px;
    border-right: 1px solid #333;
  }
  .side-nav.mobile-nav a .num { font-size: 1.2rem; }
}