:root {
  --primary: #e53935;
  --bg-dark: #1a1a2e;
  --bg-light: #f5f5f5;
  --text: #2c3e50;
  --text-light: #7f8c8d;
}

* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-light);
  color: var(--text);
  line-height: 1.6;
}
.container { max-width: 1200px; margin:0 auto; padding:0 20px; }

/* 头部 */
.site-header {
  background: linear-gradient(135deg, #c62828, #8e0000);
  position: sticky; top:0; z-index:100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
.site-header .container {
  display: flex; justify-content: space-between; align-items: center;
  height: 64px;
}
.logo a {
  color: #fff; text-decoration: none; font-size: 1.8rem;
  font-weight: 700; letter-spacing: 2px;
}
nav a {
  color: rgba(255,255,255,0.85); margin-left: 32px;
  text-decoration: none; font-size: 1.1rem; font-weight: 500;
  transition: color 0.2s;
}
nav a:hover { color: #fff; }

/* 主推区 */
.hero {
  background: linear-gradient(160deg, #e53935, #b71c1c);
  color: white; padding: 60px 0 50px;
}
.hero h2 { font-size: 2rem; margin-bottom: 30px; }
.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.hero-card {
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(12px);
  border-radius: 16px; display: flex; overflow: hidden;
  border: 1px solid rgba(255,255,255,0.2);
  transition: transform 0.3s;
}
.hero-card:hover { transform: translateY(-5px); }
.hero-card img { width: 130px; object-fit: cover; flex-shrink: 0; }
.hero-info { padding: 20px; display: flex; flex-direction: column; justify-content: center; }
.hero-info h3 { font-size: 1.4rem; margin-bottom: 8px; }
.hero-info .author { font-size: 0.9rem; opacity: 0.9; margin-bottom: 10px; }
.hero-info .intro {
  font-size: 0.9rem; opacity: 0.85; margin-bottom: 15px;
  display: -webkit-box; -webkit-line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden;
}
.btn {
  display: inline-block; padding: 8px 24px;
  background: white; color: var(--primary); border-radius: 24px;
  text-decoration: none; font-weight: 700; align-self: flex-start;
  transition: transform 0.2s;
}
.btn:hover { transform: scale(1.05); }

/* 排行榜 */
.rank-section { padding: 50px 0; background: white; }
.rank-section h2 { font-size: 1.8rem; margin-bottom: 30px; }
.rank-list { display: flex; flex-direction: column; }
.rank-item {
  display: flex; align-items: center; gap: 20px;
  padding: 16px 12px; border-bottom: 1px solid #f0f0f0;
  transition: background 0.2s;
}
.rank-item:hover { background: #fafafa; }
.rank-num {
  width: 36px; height: 36px; background: var(--primary);
  color: white; font-weight: 700; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%; flex-shrink: 0;
}
.rank-item:nth-child(1) .rank-num { background: #e53935; box-shadow: 0 0 10px rgba(229,57,53,0.4); }
.rank-item:nth-child(2) .rank-num { background: #ff6d00; box-shadow: 0 0 10px rgba(255,109,0,0.3); }
.rank-item:nth-child(3) .rank-num { background: #ff8f00; box-shadow: 0 0 10px rgba(255,143,0,0.3); }
.rank-item img {
  width: 55px; height: 75px; object-fit: cover;
  border-radius: 6px; box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}
.book-info h4 { font-size: 1.1rem; margin-bottom: 4px; }
.book-info .author { font-size: 0.85rem; color: var(--text-light); margin-bottom: 4px; }
.book-info .intro {
  font-size: 0.85rem; color: #7f8c8d;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* 分类卡片 */
.category-section { padding: 50px 0; }
.category-section h2 { font-size: 1.8rem; margin-bottom: 30px; }
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
}
.novel-card {
  background: white; border-radius: 12px; overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  transition: transform 0.3s;
}
.novel-card:hover { transform: translateY(-8px); }
.novel-card img { width: 100%; height: 250px; object-fit: cover; border-bottom: 3px solid var(--primary); }
.card-body { padding: 14px; }
.card-body h4 { font-size: 1rem; margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card-body .author { font-size: 0.8rem; color: var(--text-light); margin-bottom: 8px; }
.category-tag {
  display: inline-block; background: #ffe6e6; color: var(--primary);
  padding: 2px 12px; border-radius: 20px; font-size: 0.75rem; font-weight: 500;
}

/* 页脚 */
footer {
  background: var(--bg-dark); color: #bdc3c7;
  text-align: center; padding: 30px 0; margin-top: 40px;
  font-size: 0.9rem;
}