/* 书籍模块（书库/目录/章节） */
.book-groups{display:flex;flex-direction:column;gap:22px;margin-top:16px}
.book-group h2{font-size:1.15rem;margin:0 0 10px;padding-left:10px;border-left:4px solid var(--brand,#b33);color:var(--ink,#222)}
.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.book-card{display:flex;gap:12px;padding:12px;border:1px solid #eee;border-radius:10px;background:#fff;transition:.2s;text-decoration:none;color:inherit}
.book-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.08);transform:translateY(-2px)}
.book-cover{width:64px;height:88px;flex:0 0 64px;border-radius:6px;object-fit:cover;background:linear-gradient(135deg,#8b1a1a,#c33);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem;writing-mode:vertical-rl;letter-spacing:2px;overflow:hidden}
.book-cover img{width:100%;height:100%;object-fit:cover}
.book-meta{min-width:0;display:flex;flex-direction:column}
.book-meta .bt{font-weight:700;font-size:1.02rem;margin:0 0 2px}
.book-meta .ba{font-size:.82rem;color:#888}
.book-meta .bx{font-size:.8rem;color:#aaa;margin-top:auto}
/* 目录 */
.book-hd{display:flex;gap:16px;align-items:flex-start;margin:14px 0 18px}
.book-hd .book-cover{width:96px;height:132px;flex-basis:96px;font-size:1.4rem}
.book-intro{color:#555;line-height:1.8;font-size:.95rem}
.chap-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:8px}
.chap-list a{display:block;padding:10px 12px;border:1px solid #eee;border-radius:8px;background:#fff;text-decoration:none;color:#333;transition:.15s}
.chap-list a:hover{border-color:var(--brand,#b33);color:var(--brand,#b33)}
.chap-list .cv{font-size:.75rem;color:#aaa;margin-right:4px}
/* 章节详情 */
.chap-wrap{max-width:820px;margin:0 auto}
.chap-illus{width:100%;max-height:320px;object-fit:cover;border-radius:12px;margin:0 0 18px}
.chap-orig{background:#faf7f0;border:1px solid #efe7d6;border-radius:12px;padding:18px 20px;line-height:2;font-size:1.06rem;color:#2a2a2a;margin:0 0 20px}
.chap-orig p{margin:0 0 .6em}
.chap-sec-t{font-size:1.1rem;margin:22px 0 10px;padding-left:10px;border-left:4px solid var(--brand,#b33)}
.chap-vernacular{line-height:1.95;font-size:1rem;color:#333}
.chap-vernacular h2,.chap-vernacular h3{font-size:1.05rem;margin:18px 0 8px}
.chap-nav{display:flex;justify-content:space-between;gap:10px;margin:26px 0 10px}
.chap-nav a{flex:1;padding:12px;border:1px solid #eee;border-radius:8px;text-decoration:none;color:#444;background:#fff;font-size:.9rem}
.chap-nav a:hover{border-color:var(--brand,#b33);color:var(--brand,#b33)}
.chap-nav .nx{text-align:right}
.chap-nav .dim{opacity:.4;pointer-events:none}
.book-toc-back{display:inline-block;margin:0 0 8px;font-size:.9rem;color:#888;text-decoration:none}
.book-toc-back:hover{color:var(--brand,#b33)}
@media(max-width:560px){.book-cover{width:52px;height:72px;flex-basis:52px}.chap-list{grid-template-columns:1fr}}