body { margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background-color: #f5f5f5; }

/* 导航 */
.navbar { background: white; padding: 15px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid #ddd; }
.brand { font-weight: bold; font-size: 18px; }
.brand span { color: #ff4757; }
.links span { margin-left: 10px; font-size: 12px; color: #666; }

.container { max-width: 800px; margin: 0 auto; background: white; min-height: 100vh; }

.header-section { background: #2f3542; color: white; padding: 30px 20px; text-align: center; }
.header-section h1 { font-size: 22px; margin-bottom: 10px; }

/* 书籍网格 */
.shelf { padding: 20px; }
.book-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; } /* 手机上一行两个 */
@media(min-width: 600px) { .book-grid { grid-template-columns: 1fr 1fr 1fr; } }

.book-card { border: 1px solid #eee; border-radius: 8px; overflow: hidden; background: white; cursor: pointer; transition: transform 0.2s; }
.book-card:active { transform: scale(0.98); }
.book-img { height: 120px; width: 100%; }
.book-info { padding: 10px; }
.book-info h4 { margin: 0 0 5px; font-size: 14px; color: #333; }
.book-info p { font-size: 11px; color: #888; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.read-btn { display: inline-block; background: #ff4757; color: white; padding: 4px 10px; border-radius: 4px; font-size: 10px; }

/* SEO 区域 */
.seo-footer { padding: 20px; background: #f9f9f9; border-top: 1px solid #eee; }
.long-text p { font-size: 12px; color: #aaa; margin-bottom: 10px; }
.footer { text-align: center; padding: 20px; color: #ccc; font-size: 12px; }