/* === 阅读器核心样式 === */
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Microsoft YaHei","PingFang SC",sans-serif;background:#fafbfc;color:#2c3e50;line-height:1.7}

/* 顶部导航 */
.topbar{display:flex;align-items:center;padding:12px 24px;background:#fff;border-bottom:1px solid #e8eaed;position:sticky;top:0;z-index:100;gap:12px;flex-wrap:wrap}
.topbar a{color:#5f6368;text-decoration:none;font-size:14px}
.topbar a:hover{color:#1a73e8}
.topbar .sep{color:#bbb;font-size:14px}
.topbar .title-main{font-size:18px;font-weight:700;color:#202124;margin-right:auto}
.topbar .mode-btn{padding:6px 14px;border:1px solid #dadce0;border-radius:20px;font-size:13px;cursor:pointer;background:#fff;color:#5f6368;transition:all .15s}
.topbar .mode-btn:hover{border-color:#1a73e8;color:#1a73e8}
.topbar .mode-btn.active{background:#e8f0fe;border-color:#1a73e8;color:#1a73e8}

/* 主布局 */
.reader-wrap{display:flex;max-width:1200px;margin:0 auto;min-height:calc(100vh - 56px)}
.reader-main{flex:1;padding:32px 40px;min-width:0;border-right:1px solid #e8eaed}
.reader-side{width:420px;padding:32px 28px;background:#fff;overflow-y:auto;flex-shrink:0}

@media(max-width:960px){
  .reader-wrap{flex-direction:column}
  .reader-main{padding:20px 16px;border-right:none}
  .reader-side{width:100%;padding:20px 16px}
}

/* 原文区 */
.text-title{font-size:28px;font-weight:700;color:#202124;margin-bottom:4px}
.text-meta{font-size:14px;color:#80868b;margin-bottom:24px}
.text-meta span{margin-right:16px}

/* 夹注行 */
.ann-line{margin:6px 0;line-height:2.4}
.ann-line .orig{font-size:20px;color:#202124;font-family:"SimSun","KaiTi","STKaiti",serif;letter-spacing:1px}
.ann-line .zhushi-inline{display:flex;flex-wrap:wrap;gap:4px 16px;margin:2px 0 2px 8px;padding-left:8px;border-left:2px solid #e0e0e0}
.ann-line .zi{display:inline-flex;align-items:baseline;gap:3px;font-size:13px}
.ann-line .zi .w{color:#d93025;font-family:"SimSun","KaiTi",serif;font-size:15px}
.ann-line .zi .m{color:#80868b;font-size:12px}
.ann-line .zi .tag{font-size:10px;padding:1px 5px;border-radius:8px;white-space:nowrap}
.ann-line .zi .tag.tj{background:#fff3e0;color:#e65100}
.ann-line .zi .tag.sq{background:#fce4ec;color:#c62828}
.ann-line .zi .tag.gj{background:#e8f5e9;color:#2e7d32}
.ann-line .zi .tag.xc{background:#f3e5f5;color:#7b1fa2}

/* 旁注集合模式 */
.side-line{margin:16px 0;padding:16px 20px;background:#f8f9fa;border-radius:10px;display:flex;gap:20px;flex-wrap:wrap}
.side-line .orig-text{flex:1;min-width:200px;font-size:18px;font-family:"SimSun","KaiTi",serif;color:#202124;line-height:1.8}
.side-line .word-cards{display:flex;flex-direction:column;gap:8px;min-width:200px}
.side-line .wc{border-left:3px solid #1a73e8;padding:6px 12px;background:#fff;border-radius:0 8px 8px 0;font-size:13px}
.side-line .wc .wc-word{font-size:16px;font-weight:700;color:#d93025;font-family:"SimSun","KaiTi",serif;margin-right:4px}
.side-line .wc .wc-pinyin{color:#1a73e8;font-size:12px}
.side-line .wc .wc-meaning{color:#5f6368;margin-top:2px}
.side-line .wc .wc-tag{font-size:10px;background:#e8f0fe;color:#1a73e8;padding:1px 6px;border-radius:8px;margin-left:4px}

/* 主旨/写法/人物卡片 */
.info-block{margin:24px 0;padding:20px 24px;border-radius:12px;background:#fff;border:1px solid #e8eaed}
.info-block h4{font-size:15px;font-weight:700;color:#202124;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.info-block h4 .icon{font-size:18px}
.info-block p{font-size:15px;color:#5f6368;line-height:1.8}
.info-block .tag-row{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px}
.info-block .xf-tag{padding:4px 12px;background:#e8f0fe;color:#1a73e8;border-radius:12px;font-size:13px}
.info-block .rw-card{display:inline-block;padding:8px 16px;background:#fef7e0;border-radius:8px;margin:4px}
.info-block .rw-card .rw-name{font-weight:700;font-size:14px;color:#e37400}
.info-block .rw-card .rw-traits{font-size:13px;color:#5f6368;margin-top:2px}

/* 古诗赏析侧栏 */
.line-card{margin:12px 0;padding:16px;border-radius:10px;background:#f8f9fa;border-left:4px solid #9334e6}
.line-card .verse{font-size:17px;font-family:"SimSun","KaiTi",serif;color:#202124;margin-bottom:10px;font-weight:700}
.line-card .sx-item{margin:6px 0;font-size:13px;display:flex;gap:8px}
.line-card .sx-item .sx-label{color:#9334e6;font-weight:700;white-space:nowrap;min-width:36px}
.line-card .sx-item .sx-text{color:#5f6368}

/* 词集合页样式 */
.word-collection{margin:20px 0}
.word-collection h2{font-size:22px;margin-bottom:16px;color:#202124}
.word-table{width:100%;border-collapse:collapse;font-size:14px}
.word-table th{background:#f8f9fa;padding:12px 14px;text-align:left;font-weight:600;color:#5f6368;border-bottom:2px solid #e8eaed;font-size:13px}
.word-table td{padding:10px 14px;border-bottom:1px solid #f0f0f0;vertical-align:top}
.word-table .ww{font-size:17px;font-family:"SimSun","KaiTi",serif;color:#d93025;font-weight:700}
.word-table .src-link{color:#1a73e8;text-decoration:none;font-size:13px;cursor:pointer}
.word-table .src-link:hover{text-decoration:underline}
.word-table tr:hover{background:#f8f9fa}

/* 滚动条美化 */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#dadce0;border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:#bdc1c6}

/* 课本原图按钮 */
.img-toggle{position:fixed;right:16px;bottom:24px;background:#202124;color:#fff;border:none;padding:10px 16px;border-radius:24px;font-size:13px;cursor:pointer;z-index:99;box-shadow:0 2px 8px rgba(0,0,0,.2);transition:all .2s}
.img-toggle:hover{background:#1a73e8;transform:translateY(-2px)}
.img-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.85);z-index:9999;overflow-y:auto;padding:40px}
.img-overlay.show{display:block}
.img-overlay img{max-width:90%;margin:20px auto;display:block;border-radius:4px;box-shadow:0 4px 20px rgba(0,0,0,.3)}
.img-overlay .close-img{position:fixed;top:20px;right:30px;color:#fff;font-size:32px;cursor:pointer;z-index:1;background:none;border:none}