*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",serif;background:#faf8f5;color:#2c2523;line-height:1.8;padding:16px}
.container{max-width:800px;margin:0 auto;background:#fff;border:1px solid #ebdccb;border-radius:12px;padding:24px 28px;box-shadow:0 4px 20px rgba(138,90,43,.06)}
.breadcrumb{font-size:14px;color:#8a7a6a;margin-bottom:16px}
.breadcrumb a{color:#8a5a2b;text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}
.header{border-bottom:2px solid #f0e6d8;padding-bottom:18px;margin-bottom:22px}
.header h1{font-size:26px;color:#1c1715;line-height:1.35;margin-bottom:10px}
.header .badge{display:inline-block;background:#8a5a2b;color:#fff;font-size:13px;padding:3px 10px;border-radius:4px;margin-right:8px}
.header .badge.lv{background:#1a5276}
.header .meta{font-size:14px;color:#8a7a6a}
.char-card{background:#fbf8f3;border:1px solid #ebdccb;border-radius:8px;padding:18px 20px;margin-bottom:24px;display:flex;gap:20px;align-items:center}
.char-big{font-size:64px;font-family:"Kaiti SC","STKaiti","KaiTi",serif;color:#8a5a2b;width:80px;height:80px;display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid #ebdccb;border-radius:8px;flex-shrink:0}
.char-big-wrap{display:flex;flex-direction:column;align-items:center;gap:10px;flex-shrink:0}
.char-tts{font-size:12px;padding:4px 10px}
.char-details{font-size:15px;color:#4a3f35;flex:1}
.char-details p{margin:4px 0}
.char-details .py{font-size:18px;font-weight:600;color:#1a5276}
.sec{margin-bottom:26px}
.sec h2{font-size:20px;color:#8a5a2b;border-left:4px solid #8a5a2b;padding-left:10px;margin-bottom:12px}
.sec h2 .en{font-size:13px;color:#8a7a6a;font-weight:400;margin-left:8px}
.sec p{font-size:16px;color:#3d342d;line-height:1.85;margin-bottom:10px;text-align:justify;text-justify:inter-ideograph}
.sec .en-text{font-size:15px;color:#4f5d6b;background:#f0f4f8;border-left:4px solid #1a5276;padding:10px 14px;border-radius:0 6px 6px 0;margin:10px 0}
.en-defs li{font-size:16px;color:#3d342d;margin:6px 0 6px 20px}
.word-item{background:#fbf8f3;border:1px solid #ebdccb;border-radius:8px;padding:12px 16px;margin:10px 0}
.word-item .w{font-size:17px;font-weight:600;color:#6b4423}
.word-item .w-en{font-size:14px;color:#4f5d6b;margin-left:10px}
.collo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.collo-card{border:1px solid var(--border);border-radius:12px;padding:12px 14px;background:var(--card);transition:box-shadow .2s}
.collo-card:hover{box-shadow:0 4px 16px -6px var(--shadow)}
.collo-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.collo-w{font-size:20px;font-weight:700;color:var(--ink)}
.collo-py{font-size:13px;color:var(--accent);margin-top:4px}
.collo-en{font-size:13px;color:var(--muted);margin-top:2px}
.collo-head .collo-tts{margin-left:auto;font-size:13px;padding:3px 8px}
.ml-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.ml-tab{font-size:14px;padding:6px 14px;border:1px solid var(--border);border-radius:18px;background:var(--card);color:var(--muted);cursor:pointer;line-height:1;transition:all .2s}
.ml-tab.on{background:var(--accent);border-color:var(--accent);color:#fff}
.ml-tab .cnt{font-size:11px;opacity:.75;margin-left:2px}
.ml-list{display:flex;flex-direction:column;gap:10px}
.ml-row{border:1px solid var(--border);border-radius:12px;padding:12px 14px;background:var(--card)}
.ml-en{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:6px}
.ml-item{display:flex;align-items:baseline;gap:8px;font-size:14px;margin-top:3px}
.ml-tag{flex:0 0 auto;font-size:11px;font-weight:700;color:#fff;background:var(--accent);border-radius:4px;padding:1px 6px}
.ml-item .ml-txt{color:var(--muted)}
.ml-body{display:none}
.ml-body.on{display:flex;flex-direction:column;gap:10px}
/* 发音跟读评测 */
.read-panel{border:1px solid var(--border);border-radius:14px;padding:18px;background:linear-gradient(180deg,var(--card) 0%,var(--soft,#faf6f0) 100%);display:flex;flex-direction:column;gap:12px;position:relative;overflow:hidden}
.read-panel::before{content:'';position:absolute;top:-40px;right:-40px;width:120px;height:120px;border-radius:50%;background:radial-gradient(circle,hsl(var(--primary)/0.12) 0%,transparent 70%);pointer-events:none}
.read-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.read-char{font-size:52px;font-weight:700;color:var(--ink);font-family:"Kaiti SC","STKaiti","KaiTi",serif;line-height:1}
.read-py{font-size:15px;color:var(--accent);font-weight:600;margin-top:4px}
.read-badge{display:inline-flex;align-items:center;gap:5px;border-radius:16px;padding:5px 12px;font-size:13px;font-weight:700;background:var(--muted,#eee);color:#777;white-space:nowrap;transition:all .25s}
.read-badge.good{background:#2e7d32;color:#fff;box-shadow:0 4px 12px rgba(46,125,50,.3)}
.read-badge.mid{background:#b8860b;color:#fff;box-shadow:0 4px 12px rgba(184,134,11,.3)}
.read-badge.bad{background:#b22222;color:#fff;box-shadow:0 4px 12px rgba(178,34,34,.3)}
.read-wave{display:none;align-items:flex-end;justify-content:center;gap:3px;height:44px;margin:4px 0}
.read-wave.on{display:flex}
.read-wave i{width:4px;height:12%;border-radius:2px;background:hsl(var(--primary)/0.6)}
.read-wave i:nth-child(3n){background:hsl(var(--primary)/0.85)}
.read-wave i:nth-child(4n){background:hsl(var(--primary)/0.4)}
.read-wave i.anim{animation:wave 0.9s ease-in-out infinite}
.read-wave i.anim:nth-child(1){animation-delay:0s}.read-wave i.anim:nth-child(2){animation-delay:.07s}.read-wave i.anim:nth-child(3){animation-delay:.14s}.read-wave i.anim:nth-child(4){animation-delay:.21s}.read-wave i.anim:nth-child(5){animation-delay:.28s}.read-wave i.anim:nth-child(6){animation-delay:.35s}.read-wave i.anim:nth-child(7){animation-delay:.42s}.read-wave i.anim:nth-child(8){animation-delay:.49s}.read-wave i.anim:nth-child(9){animation-delay:.56s}.read-wave i.anim:nth-child(10){animation-delay:.63s}.read-wave i.anim:nth-child(11){animation-delay:.7s}.read-wave i.anim:nth-child(12){animation-delay:.77s}
@keyframes wave{0%,100%{height:14%}50%{height:92%}}
.read-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.read-btn{display:inline-flex;align-items:center;gap:6px;border:none;border-radius:10px;padding:11px 22px;font-size:15px;cursor:pointer;line-height:1;transition:all .2s;background:var(--accent);color:#fff}
.read-btn.rec{background:#b22222}
.read-btn.rec{animation:readPulse 1.2s infinite}
.read-btn:disabled{opacity:.6;cursor:default}
@keyframes readPulse{0%,100%{box-shadow:0 0 0 0 rgba(178,34,34,.4)}50%{box-shadow:0 0 0 8px rgba(178,34,34,0)}}
.read-tip{font-size:14px;color:var(--muted)}
.read-result{display:none;border-top:1px dashed var(--border);padding-top:12px;flex-direction:column;gap:6px}
.read-result.show{display:flex}
.read-heard{font-size:15px;color:var(--ink)}
.read-score{font-size:18px;font-weight:700}
.read-score.good{color:#2e7d32}.read-score.mid{color:#b8860b}.read-score.bad{color:#b22222}
.read-encourage{font-size:14px;color:var(--muted)}
@media print{.read-panel{display:none !important}}
/* 字形演变步骤动画与释义解读 */
.evo-box{border:1px solid var(--border);border-radius:14px;padding:18px;background:linear-gradient(180deg,var(--card) 0%,var(--soft,#faf6f0) 100%);margin-bottom:14px}
.evo-timeline{display:flex;align-items:center;justify-content:space-between;gap:6px;overflow-x:auto;padding:8px 0 16px;position:relative}
.evo-step{display:flex;flex-direction:column;align-items:center;gap:6px;flex:1;min-width:64px;cursor:pointer;padding:6px;border-radius:10px;transition:all .25s;position:relative}
.evo-step:hover{background:hsl(var(--primary)/0.08)}
.evo-step.active{background:hsl(var(--primary)/0.15);box-shadow:0 2px 8px hsl(var(--primary)/0.2)}
.evo-img-wrap{width:56px;height:56px;border-radius:8px;border:1px solid var(--border);background:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.evo-img-wrap img{width:100%;height:100%;object-fit:contain}
.evo-name{font-size:13px;font-weight:700;color:var(--ink)}
.evo-order{font-size:11px;color:var(--muted)}
.evo-arrow{color:var(--muted);font-size:16px;flex:0 0 auto;opacity:.6}
.evo-detail{border-top:1px dashed var(--border);padding-top:14px;display:flex;flex-direction:column;gap:8px}
.evo-detail-title{font-size:16px;font-weight:700;color:var(--ink);display:flex;align-items:center;gap:8px}
.evo-badge{font-size:11px;padding:2px 8px;border-radius:10px;background:var(--accent);color:#fff;font-weight:600}
.evo-text{font-size:14px;line-height:1.8;color:var(--ink)}
.evo-hist{font-size:13px;line-height:1.7;color:var(--muted);background:hsl(var(--primary)/0.05);padding:10px 12px;border-radius:8px;border-left:3px solid var(--accent)}
.evo-play-btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);border-radius:8px;padding:6px 14px;background:var(--card);color:var(--accent);font-size:13px;cursor:pointer;line-height:1;transition:all .2s;align-self:flex-start;margin-top:6px}
.evo-play-btn:hover{background:var(--accent);color:#fff}
@keyframes pulseEvo{0%,100%{transform:scale(1)}50%{transform:scale(1.08)}}
.evo-step.animating .evo-img-wrap{animation:pulseEvo .6s ease-in-out infinite}

/* 随堂测试翻转卡片（3D 水墨微阴影翻转 + 触控流畅反馈） */
.flip-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.flip-card{perspective:1000px;min-height:220px;cursor:pointer;-webkit-tap-highlight-color:transparent}
.flip-inner{position:relative;width:100%;min-height:220px;transition:transform .5s cubic-bezier(.4,.2,.2,1);transform-style:preserve-3d}
.flip-card.flipped .flip-inner{transform:rotateY(180deg)}
.flip-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:14px;padding:18px;display:flex;flex-direction:column;justify-content:space-between;border:1px solid var(--border);background:var(--card);box-shadow:0 2px 8px rgba(0,0,0,.04),0 8px 24px -4px rgba(0,0,0,.06);transition:box-shadow .2s,transform .2s}
.flip-card:active .flip-face{transform:scale(.98);box-shadow:0 1px 4px rgba(0,0,0,.08)}
.flip-card:hover .flip-face{box-shadow:0 4px 14px rgba(0,0,0,.08),0 12px 28px -6px rgba(0,0,0,.1)}
.flip-front{background:linear-gradient(135deg,var(--card) 0%,var(--soft,#faf6f0) 100%)}
.flip-back{background:linear-gradient(135deg,#fffdf9 0%,#f5ece0 100%);transform:rotateY(180deg);border-color:hsl(var(--primary)/0.3);box-shadow:0 4px 16px hsl(var(--primary)/0.12),0 10px 28px -4px rgba(0,0,0,.08)}
.flip-q-mark{font-size:36px;font-weight:700;color:var(--accent);line-height:1}
.flip-py{font-size:18px;font-weight:700;color:var(--ink);margin-top:6px}
.flip-en{font-size:14px;color:var(--muted);line-height:1.5;margin-top:8px;flex:1}
.flip-hint{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:4px;opacity:.75}
.flip-char{font-size:48px;font-weight:700;color:var(--ink);font-family:"Kaiti SC","STKaiti","KaiTi",serif;line-height:1}
.flip-back-body{display:flex;flex-direction:column;gap:6px;flex:1}
.flip-back-acts{display:flex;align-items:center;gap:8px;margin-top:10px}
.flip-act-btn{font-size:13px;padding:6px 12px;border:1px solid var(--border);border-radius:8px;background:var(--card);color:var(--accent);cursor:pointer;line-height:1;transition:all .2s;text-decoration:none}
.flip-act-btn:hover{background:var(--accent);color:#fff}
.flip-act-btn.del{color:#b22222;border-color:rgba(178,34,34,.3)}
.flip-act-btn.del:hover{background:#b22222;color:#fff}

/* 错题复习字帖打印区 */
.review-sheet{display:none;background:#fff;padding:20px;border-radius:12px;margin-top:16px;border:1px solid var(--border)}
.review-sheet-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px}
.review-sheet-cell{border:1px solid #d4c5b9;border-radius:8px;padding:10px;display:flex;flex-direction:column;align-items:center;gap:6px;background:#fffdf9;position:relative}
.review-sheet-cell .sc-py{font-size:13px;color:#8c6d58;font-weight:600}
.review-sheet-cell .sc-grid{width:80px;height:80px;border:1.5px solid #b22222;position:relative;display:flex;align-items:center;justify-content:center}
.review-sheet-cell .sc-grid::before{content:'';position:absolute;inset:0;background:repeating-linear-gradient(0deg,transparent,transparent 39px,#f3d7d7 39px,#f3d7d7 41px,transparent 41px),repeating-linear-gradient(90deg,transparent,transparent 39px,#f3d7d7 39px,#f3d7d7 41px,transparent 41px)}
.review-sheet-cell .sc-char{font-size:48px;color:#1a1a1a;font-family:"Kaiti SC","STKaiti","KaiTi",serif;position:relative;z-index:1;line-height:1}
.review-sheet-cell .sc-trace{font-size:48px;color:#d0d0d0;font-family:"Kaiti SC","STKaiti","KaiTi",serif;position:relative;z-index:1;line-height:1}
.review-sheet-cell .sc-en{font-size:11px;color:#888;text-align:center;line-height:1.3;max-height:2.6em;overflow:hidden}

@media print{
  body *{visibility:hidden}
  .review-sheet,.review-sheet *{visibility:visible}
  .review-sheet{position:absolute;left:0;top:0;width:100%;display:block !important;border:none;padding:0}
  .review-sheet-grid{grid-template-columns:repeat(4,1fr);gap:10px}
}
.quiz-card{border:1px solid var(--border);border-radius:12px;padding:16px;background:var(--card)}
.quiz-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.quiz-q{font-size:24px;font-weight:700;color:var(--ink);letter-spacing:2px}
.quiz-py{font-size:16px;font-weight:600;color:var(--accent)}
.quiz-en{font-size:14px;color:var(--muted);margin-top:8px}
.quiz-ans{display:none;font-size:15px;color:var(--muted);margin-top:10px;line-height:1.9}
@keyframes quizFade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.quiz-ans.show{display:block;animation:quizFade .25s}
@media print{.ml-tabs,.quiz-btn{display:none !important}.ml-body{display:flex !important}}
.quiz-ans .qa-char{font-size:20px;font-weight:700;color:var(--ink)}
.quiz-btn{font-size:14px;padding:6px 14px;border:1px solid var(--border);border-radius:8px;background:var(--card);color:var(--accent);cursor:pointer;line-height:1;margin-top:10px}
.quiz-btn:hover{background:var(--accent);color:#fff}
.quiz-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:12px}
.quiz-btn.ghost{border-color:transparent;color:var(--muted);background:transparent}
.quiz-btn.ghost:hover{color:var(--accent);background:var(--card)}
.quiz-btn.added{background:#2e7d32;border-color:#2e7d32;color:#fff}
.mistake-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;border:1px dashed var(--border);border-radius:10px;padding:10px 14px;background:var(--card);margin-bottom:12px;flex-wrap:wrap}
.mistake-bar .mb-info{font-size:14px;color:var(--muted)}
.mistake-bar .mb-actions{display:flex;gap:8px;flex-wrap:wrap}
.mistake-link{font-size:14px;color:var(--accent);text-decoration:underline;cursor:pointer}
.review-grid{display:flex;flex-direction:column;gap:8px}
.review-item{display:flex;align-items:center;gap:12px;border:1px solid var(--border);border-radius:10px;padding:10px 14px;background:var(--card)}
.review-item .rc{font-size:28px;font-weight:700;color:var(--ink);font-family:"Kaiti SC","STKaiti","KaiTi",serif}
.review-item .rp{font-size:14px;color:var(--accent);font-weight:600}
.review-item .ra{margin-left:auto;font-size:14px;color:var(--accent);text-decoration:underline;cursor:pointer;white-space:nowrap}
.review-item .rx{font-size:13px;color:#b22222;cursor:pointer;margin-left:8px;white-space:nowrap}
.word-item .sent{font-size:15px;color:#3d342d;margin-top:6px}
.word-item .sent-en{font-size:14px;color:#6b7a89;margin-top:4px}
.quote-box{background:#f7f2eb;border-left:4px solid #a67c52;border-radius:6px;padding:14px 18px;margin:12px 0;font-size:15px;color:#4f443b}
.mesh-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
.mesh-links a{display:inline-block;background:#f5eee6;color:#6b4423;font-size:14px;padding:6px 14px;border-radius:20px;text-decoration:none;border:1px solid #e5d6c5;transition:all .2s}
.mesh-links a:hover{background:#8a5a2b;color:#fff;border-color:#8a5a2b}
.level-nav{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
.level-nav a{display:inline-block;padding:6px 16px;border-radius:6px;background:#f5eee6;color:#6b4423;text-decoration:none;font-size:14px;border:1px solid #e5d6c5}
.level-nav a:hover{background:#8a5a2b;color:#fff}
.level-nav a.cur{background:#1a5276;color:#fff;border-color:#1a5276}
.matrix-grid{display:flex;flex-wrap:wrap;gap:10px}
.matrix-chip{display:inline-block;padding:6px 14px;border-radius:6px;font-size:15px;text-decoration:none;background:#f5ede0;color:#8a5a2b;border:1px solid #d4c5b0;transition:all .2s}
.matrix-chip:hover{background:#8a5a2b;color:#fff}
.matrix-chip .py{display:block;font-size:11px;color:#8a7a6a}
.matrix-chip:hover .py{color:#f0e6d8}
.matrix-chip .en{display:block;font-size:10px;color:#6b7a89;margin-top:1px;line-height:1.2;max-width:90px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.matrix-chip:hover .en{color:#e8d8c8}
.idx-note{font-size:14px;color:#8a7a6a;margin:10px 0}
/* 米字格楷书临摹字帖卡片 */
.copybook{margin:14px 0}
.copybook-card{display:flex;flex-direction:column;gap:14px;background:#fbf8f3;border:1px solid #ebdccb;border-radius:10px;padding:18px}
.copybook-row{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.mizige{position:relative;width:180px;height:180px;background:#fff;border:2px solid #8a5a2b;flex-shrink:0;display:flex;align-items:center;justify-content:center}
.mizige::before,.mizige::after{content:"";position:absolute;background:#d9c4ab}
.mizige::before{left:50%;top:0;bottom:0;width:1px;transform:translateX(-0.5px)}
.mizige::after{top:50%;left:0;right:0;height:1px;transform:translateY(-0.5px)}
.mizige .diag{position:absolute;inset:0;pointer-events:none}
.mizige .diag::before,.mizige .diag::after{content:"";position:absolute;left:0;right:0;top:50%;height:1px;background:#e3d2bd;transform-origin:center}
.mizige .diag::before{transform:translateY(-0.5px) rotate(45deg)}
.mizige .diag::after{transform:translateY(-0.5px) rotate(-45deg)}
.mizige .ch{font-size:120px;font-family:"Kaiti SC","STKaiti","KaiTi",serif;color:#2c2523;line-height:1;z-index:1}
.copybook-info{font-size:15px;color:#4a3f35;flex:1;min-width:200px}
.copybook-info p{margin:5px 0}
.copybook-info .tip{font-size:14px;color:#8a7a6a;background:#f0e6d8;border-radius:6px;padding:10px;margin-top:8px}
.copybook-ref{width:100%;border-radius:8px;overflow:hidden;border:1px solid #ebdccb}
.copybook-ref img{width:100%;height:auto;display:block}
.copybook-ref .cap{font-size:13px;color:#8a7a6a;text-align:center;padding:8px;background:#f5ede0}
/* 骨架屏 shimmer */
.skeleton{position:relative;overflow:hidden;background:#ece6dd;border-radius:6px}
.skeleton::after{content:"";position:absolute;inset:0;transform:translateX(-100%);background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent);animation:hsk-shimmer 1.4s infinite}
@keyframes hsk-shimmer{100%{transform:translateX(100%)}}
.lazy-block{position:relative}
.lazy-block .real{opacity:0;transition:opacity .4s ease}
.lazy-block .skel{position:absolute;inset:0;display:flex;flex-direction:column;gap:8px;padding:12px}
.lazy-block.ready .real{opacity:1}
.lazy-block.ready .skel{display:none}
.skel .ln{height:14px;border-radius:4px}
.skel .ln.w60{width:60%}.skel .ln.w40{width:40%}.skel .ln.w80{width:80%}
.img-wrap{position:relative;width:100%;min-height:200px;background:#ece6dd;border-radius:8px;overflow:hidden}
.img-wrap img{width:100%;height:auto;display:block;opacity:0;transition:opacity .4s ease}
.img-wrap.loaded img{opacity:1}
.img-wrap.loaded .skel{display:none}
.img-wrap .skel{position:absolute;inset:0;display:flex;flex-direction:column;gap:10px;padding:16px}
/* 笔顺动画 */
.stroke-box{background:#fbf8f3;border:1px solid #ebdccb;border-radius:8px;padding:18px;text-align:center}
.stroke-svg{width:220px;height:220px;margin:0 auto}
.stroke-svg path{fill:none;stroke:#8a5a2b;stroke-width:6;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:1200;stroke-dashoffset:1200;animation:hsk-draw 3s ease-in-out forwards}
@keyframes hsk-draw{to{stroke-dashoffset:0}}
.stroke-note{font-size:14px;color:#8a7a6a;margin-top:12px}
/* TTS 试听按钮 */
.tts-btn{display:inline-flex;align-items:center;gap:6px;background:#1a5276;color:#fff;border:none;border-radius:20px;padding:5px 12px;font-size:13px;cursor:pointer;line-height:1;vertical-align:middle;transition:opacity .2s}
.tts-btn:hover{opacity:.85}
.tts-btn.playing{background:#0b3a55}
.tts-btn .ic{font-size:15px}
/* 手写描红面板 */
.trace-panel{margin-top:18px}
.trace-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-bottom:12px}
.trace-head .label{font-size:15px;color:#4a3f35;font-weight:600}
.trace-head .hint{font-size:13px;color:#8a7a6a}
.trace-tools{display:flex;gap:8px;flex-wrap:wrap}
.trace-tools button{background:#f5ede0;color:#6b4423;border:1px solid #d4c5b0;border-radius:6px;padding:6px 14px;font-size:13px;cursor:pointer;line-height:1;transition:all .2s}
.trace-tools button:hover{background:#8a5a2b;color:#fff;border-color:#8a5a2b}
.trace-canvas-wrap{position:relative;width:100%;max-width:360px;background:#fff;border:2px solid #8a5a2b;border-radius:8px;overflow:hidden}
.trace-canvas-wrap::before,.trace-canvas-wrap::after{content:"";position:absolute;background:#d9c4ab;pointer-events:none}
.trace-canvas-wrap::before{left:50%;top:0;bottom:0;width:1px}
.trace-canvas-wrap::after{top:50%;left:0;right:0;height:1px}
.trace-canvas-wrap .ghost{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:160px;font-family:"Kaiti SC","STKaiti","KaiTi",serif;color:#e0d4c2;pointer-events:none;z-index:0}
.trace-canvas-wrap canvas{position:relative;z-index:1;display:block;width:100%;height:auto;touch-action:none;cursor:crosshair}
/* 打印导出按钮 */
.print-btn{display:inline-flex;align-items:center;gap:6px;background:#8a5a2b;color:#fff;border:none;border-radius:8px;padding:8px 16px;font-size:14px;cursor:pointer;line-height:1;transition:opacity .2s;margin-top:12px}
.print-btn:hover{opacity:.85}
/* A4 打印临摹纸 */
@media print{
  body{background:#fff;padding:0}
  .breadcrumb,.trace-panel,.tts-btn,.print-btn,.mesh-links,.footer,.level-nav,.copybook-ref,.stroke-box,.lazy-block .skel,.img-wrap .skel{display:none !important}
  .container{border:none;box-shadow:none;max-width:100%;padding:0;margin:0}
  .header h1{font-size:22px}
  .sec{break-inside:avoid}
  .copybook-card{break-inside:avoid;border:1px solid #999}
  .print-sheet{display:block !important;margin-top:20px;page-break-after:always}
  .print-sheet .grid{display:flex;flex-wrap:wrap;gap:0;border:2px solid #333}
  .print-sheet .cell{width:25%;height:130px;border:1px solid #bbb;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center}
  .print-sheet .cell .cell-py{position:absolute;top:4px;left:0;right:0;text-align:center;font-size:13px;color:#666}
  .print-sheet .cell .g{font-size:68px;font-family:"Kaiti SC","STKaiti","KaiTi",serif;color:#d8cbb8}
  .print-sheet .cell::before,.print-sheet .cell::after{content:"";position:absolute;background:#e2d8cb}
  .print-sheet .cell::before{left:50%;top:0;bottom:0;width:1px}
  .print-sheet .cell::after{top:50%;left:0;right:0;height:1px}
  .print-sheet .title{font-size:18px;font-weight:600;margin-bottom:4px;text-align:center}
  .print-sheet .sub-title{font-size:13px;color:#666;margin-bottom:12px;text-align:center}
  .print-sheet .stroke-steps{margin-top:18px;break-inside:avoid}
  .print-sheet .ss-title{font-size:15px;font-weight:600;margin-bottom:10px}
  .print-sheet .ss-grid{display:flex;flex-wrap:wrap;gap:8px}
  .print-sheet .ss-note{font-size:14px;color:#555}
  .print-sheet .step{display:flex;flex-direction:column;align-items:center;width:80px}
  .print-sheet .step-no{font-size:12px;color:#8a5a2b;font-weight:600;margin-bottom:4px}
  .print-sheet .step-svg{width:72px;height:72px;border:1px solid #ccc;background:#fff}
  .print-sheet .step-svg .done{fill:none;stroke:#ccc;stroke-width:28;stroke-linecap:round;stroke-linejoin:round}
  .print-sheet .step-svg .cur{fill:none;stroke:#8a5a2b;stroke-width:30;stroke-linecap:round;stroke-linejoin:round}
  .print-sheet .seal{display:flex;align-items:center;gap:12px;margin-top:24px;justify-content:flex-end}
  .print-sheet .seal-box{width:56px;height:56px;border:3px solid #b22222;color:#b22222;display:flex;align-items:center;justify-content:center;font-size:18px;font-family:"Kaiti SC","STKaiti","KaiTi",serif;border-radius:6px;line-height:1.1;text-align:center}
  .print-sheet .seal-text{font-size:13px;color:#888}
}
.print-sheet{display:none}
/* 字源思维导图 */
.mindmap{background:#fbf8f3;border:1px solid #ebdccb;border-radius:10px;padding:18px 16px}
.mm-group{margin-bottom:14px}
.mm-label{font-size:13px;color:#8a7a6a;margin-bottom:8px;font-weight:600}
.mm-nodes{display:flex;flex-wrap:wrap;gap:8px}
.mm-node{display:inline-flex;flex-direction:column;align-items:center;text-decoration:none;background:#fff;border:1px solid #d4c5b0;border-radius:8px;padding:6px 10px;min-width:48px;transition:all .2s}
.mm-node:hover{background:#8a5a2b;border-color:#8a5a2b}
.mm-node:hover .mm-ch{color:#fff}
.mm-node:hover .mm-py{color:#f0e6d8}
.mm-ch{font-size:22px;font-family:"Kaiti SC","STKaiti","KaiTi",serif;color:#6b4423;line-height:1.1}
.mm-py{font-size:11px;color:#8a7a6a;margin-top:2px}
.mm-node.similar{border-color:#c9a96e;background:#fdf6ec}
.mm-center{display:flex;flex-direction:column;align-items:center;margin:16px auto 8px;padding:14px 26px;background:#8a5a2b;color:#fff;border-radius:12px;width:fit-content;box-shadow:0 4px 14px rgba(138,90,43,.25)}
.mm-rad{font-size:12px;color:#f0e6d8;margin-bottom:4px}
.mm-core{font-size:40px;font-family:"Kaiti SC","STKaiti","KaiTi",serif;line-height:1}
.mm-core-py{font-size:13px;color:#f0e6d8;margin-top:4px}
.mm-note{font-size:14px;color:#8a7a6a;margin-top:14px;line-height:1.7}
/* 总入口等级卡片网格 */
.lv-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;margin-top:8px}
.lv-card{display:block;text-decoration:none;background:#fbf8f3;border:1px solid #ebdccb;border-radius:10px;padding:16px;transition:all .2s;color:inherit}
.lv-card:hover{border-color:#8a5a2b;box-shadow:0 6px 18px rgba(138,90,43,.12);transform:translateY(-2px)}
.lv-card-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.lv-badge{display:inline-block;background:#1a5276;color:#fff;font-size:13px;padding:3px 10px;border-radius:4px}
.lv-name{font-size:18px;font-weight:600;color:#6b4423}
.lv-card-stats{display:flex;gap:18px;margin-bottom:10px}
.lv-card-stats .st{font-size:14px;color:#8a7a6a}
.lv-card-stats .st b{font-size:18px;color:#8a5a2b;margin-right:3px}
.lv-card-req{font-size:14px;color:#5a4f45;line-height:1.7;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.lv-preview{display:flex;flex-wrap:wrap;gap:6px}
.prev-chip{display:inline-block;background:#fff;border:1px solid #d4c5b0;border-radius:6px;padding:2px 9px;font-size:15px;color:#6b4423;font-family:"Kaiti SC","STKaiti","KaiTi",serif;text-decoration:none;transition:all .15s}
.prev-chip:hover{background:#8a5a2b;color:#fff;border-color:#8a5a2b}
.prev-more{display:inline-block;padding:2px 6px;font-size:12px;color:#8a7a6a;align-self:center}
.footer{margin-top:36px;padding-top:18px;border-top:1px solid #f0e6d8;font-size:13px;color:#9c8c7c;text-align:center}
@media(max-width:640px){
  body{padding:10px}
  .container{padding:16px 18px}
  .header h1{font-size:21px}
  .header .meta{font-size:13px}
  .sec h2{font-size:18px}
  .sec p{font-size:15px}
  .char-card{flex-direction:column;align-items:flex-start;gap:14px;padding:16px}
  .char-big-wrap{margin:0 auto}
  .char-big{font-size:56px;width:72px;height:72px}
  .char-details{font-size:14px}
  .char-details .py{font-size:16px}
  .copybook-card{padding:14px}
  .mizige{width:150px;height:150px}
  .mizige .ch{font-size:100px}
  .word-item{padding:10px 12px}
  .word-item .w{font-size:16px}
  .word-item .sent{font-size:14px}
  .trace-canvas-wrap .ghost{font-size:120px}
  .sec{margin-bottom:20px}
}