:root{
  --bg:#f5f7fb; --card:#ffffff; --ink:#1f2937; --sub:#6b7280;
  --pri:#2563eb; --pri2:#1d4ed8; --ok:#16a34a; --no:#dc2626;
  --acc:#f59e0b; --line:#e5e7eb; --soft:#eef2ff;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei",-apple-system,system-ui,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.7;-webkit-font-smoothing:antialiased}
.wrap{max-width:880px;margin:0 auto;padding:18px 14px 60px}
header.top{display:flex;align-items:center;gap:12px;margin-bottom:6px}
header.top .badge{background:var(--pri);color:#fff;border-radius:10px;padding:6px 12px;font-weight:700;font-size:15px}
header.top h1{font-size:20px}
header.top .en{color:var(--sub);font-size:13px}
a.home{display:inline-block;margin-bottom:10px;color:var(--pri);text-decoration:none;font-size:13px}
a.home:hover{text-decoration:underline}

/* 课文切换 */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 18px}
.tabs button{flex:1;min-width:96px;border:1px solid var(--line);background:var(--card);
  border-radius:12px;padding:12px 8px;font-size:15px;cursor:pointer;color:var(--ink);transition:.15s;font-weight:600}
.tabs button .n{display:block;font-size:12px;color:var(--sub);font-weight:400;margin-top:2px}
.tabs button.on{background:var(--pri);color:#fff;border-color:var(--pri)}
.tabs button.on .n{color:#dbeafe}

/* 板块 */
.board{background:var(--card);border:1px solid var(--line);border-radius:16px;
  padding:16px 16px 18px;margin-bottom:16px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.board>h2{font-size:16px;margin-bottom:4px;display:flex;align-items:center;gap:8px}
.board>h2 .ic{width:26px;height:26px;border-radius:8px;background:var(--soft);
  color:var(--pri);display:grid;place-items:center;font-size:14px}
.board .hint-line{color:var(--sub);font-size:13px;margin-bottom:12px}

/* 生词表 */
.vocab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.vocab{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:10px;padding:8px 10px}
.vocab .zh{font-size:18px;font-weight:600}
.vocab .py{color:var(--sub);font-size:12px}
.vocab button.ply{border:none;background:var(--soft);color:var(--pri);border-radius:50%;
  width:30px;height:30px;cursor:pointer;font-size:14px;flex:0 0 auto}
.vocab button.ply:hover{background:var(--pri);color:#fff}

/* 课文行 */
.textline{display:flex;gap:10px;align-items:flex-start;padding:7px 0;border-bottom:1px dashed var(--line)}
.textline:last-child{border-bottom:none}
.textline .who{color:var(--pri2);font-weight:600;flex:0 0 auto;min-width:42px}
.textline .zh{font-size:16px}
.textline .en{color:var(--sub);font-size:12px;display:block}
.textline button.ply{border:none;background:var(--soft);color:var(--pri);border-radius:50%;
  width:26px;height:26px;cursor:pointer;flex:0 0 auto;font-size:12px}
.textline button.ply:hover{background:var(--pri);color:#fff}
.btn-full{margin-top:10px;border:1px solid var(--pri);color:var(--pri);background:#fff;
  border-radius:10px;padding:8px 14px;cursor:pointer;font-size:14px}
.btn-full:hover{background:var(--pri);color:#fff}

/* 题目卡 */
.ex{background:var(--soft);border-radius:12px;padding:12px 13px;margin-bottom:11px}
.ex .p{font-size:15px;margin-bottom:9px}
.ex .p .tag{display:inline-block;background:var(--pri);color:#fff;border-radius:6px;
  font-size:11px;padding:1px 7px;margin-right:6px;vertical-align:middle}
.opts{display:flex;flex-direction:column;gap:7px}
.opt{border:1px solid var(--line);background:#fff;border-radius:9px;padding:9px 11px;
  cursor:pointer;font-size:15px;text-align:left;transition:.12s}
.opt:hover{border-color:var(--pri)}
.opt.correct{background:#dcfce7;border-color:var(--ok);color:#14532d}
.opt.wrong{background:#fee2e2;border-color:var(--no);color:#7f1d1d}
.opt.dim{opacity:.5}
.ex .fb{margin-top:9px;font-size:13px;padding:8px 10px;border-radius:8px;display:none}
.ex .fb.ok{display:block;background:#dcfce7;color:#14532d}
.ex .fb.no{display:block;background:#fee2e2;color:#7f1d1d}
.ex .check{margin-top:9px;border:none;background:var(--pri);color:#fff;border-radius:9px;
  padding:8px 16px;cursor:pointer;font-size:14px;font-weight:600}
.ex .check:disabled{background:#cbd5e1;cursor:default}
.ex .hint{margin-top:8px;font-size:13px;color:var(--acc);display:none}
.ex .hint.show{display:block}
.ex input.ans{border:1px solid var(--line);border-radius:9px;padding:9px 11px;font-size:16px;
  width:100%;margin-bottom:9px}
.ex .aud-btn{border:none;background:var(--soft);color:var(--pri);border-radius:8px;
  padding:6px 10px;cursor:pointer;font-size:14px;margin-bottom:9px}
.ex .aud-btn:hover{background:var(--pri);color:#fff}

/* 排序题 */
.order-cards{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:9px}
.order-cards .c{border:1px solid var(--pri);background:#fff;color:var(--pri);border-radius:8px;
  padding:6px 11px;cursor:pointer;font-size:16px;text-align:center}
.order-cards .c .tz{display:block}
.order-cards .c .tpy{display:block;font-size:11px;color:var(--sub);margin-top:1px;line-height:1.2}
.order-ans .c .tz{display:block}
.order-ans .c .tpy{display:block;font-size:11px;color:var(--sub);margin-top:1px;line-height:1.2}
.order-cards.picked .c{background:var(--pri);color:#fff}
.order-ans{display:flex;flex-wrap:wrap;gap:7px;min-height:44px;border:1px dashed var(--line);
  border-radius:8px;padding:7px;margin-bottom:9px}
.order-ans .c{background:var(--soft);border:1px solid var(--pri);color:var(--pri);border-radius:8px;
  padding:8px 11px;cursor:pointer;font-size:16px}
.order-ans .c:hover{border-color:var(--no)}

/* 语法点 */
.gp{border:1px solid var(--line);border-radius:12px;padding:12px;margin-bottom:12px;background:#fff}
.gp .tip{background:var(--soft);border-radius:8px;padding:8px 10px;font-size:13px;color:var(--ink);margin-bottom:4px}
.gp .ex-name{font-weight:700;font-size:14px;margin-bottom:8px;color:var(--pri2)}
.gp .ex-eg{color:var(--sub);font-size:13px;margin-bottom:10px;font-style:italic}

/* 汉字练习 */
.hanzi-row{display:flex;gap:14px;align-items:flex-start;border:1px solid var(--line);
  border-radius:12px;padding:12px;margin-bottom:11px;background:#fff}
.hanzi-box{width:160px;height:160px;background:#fff;border:2px solid #fde68a;border-radius:8px;flex:0 0 auto}
.hanzi-meta{flex:1}
.hanzi-meta .ch{font-size:30px;font-weight:700}
.hanzi-meta .ctr{font-size:13px;color:var(--sub);margin:4px 0 8px}
.hanzi-meta .mini{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:8px}
.hanzi-meta button{border:1px solid var(--pri);color:var(--pri);background:#fff;border-radius:8px;
  padding:6px 10px;cursor:pointer;font-size:13px}
.hanzi-meta button:hover{background:var(--pri);color:#fff}
.hanzi-meta .prg{font-size:13px;color:var(--ok);font-weight:600}
/* 默写环节（整体末段） */
.dictate-row{border:1px solid var(--line);border-radius:12px;padding:12px;margin-bottom:11px;background:#fff}
.dictate-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.dictate-head .py{font-size:15px;color:var(--sub);font-weight:600}
.dictate-grid{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:8px}
.dictate-cell{display:flex;flex-direction:column;align-items:center}
.hanzi-box.small{width:120px;height:120px;background:#fff;border:2px solid #fde68a;border-radius:8px;flex:0 0 auto}
.hanzi-box.small.done{box-shadow:0 0 0 3px var(--ok) inset}
.dictate-row .reveal{font-size:22px;font-weight:700;margin-left:6px}
/* 默写评分 */
.dictate-score{background:linear-gradient(135deg,#eef2ff,#ecfdf5);border:1px solid var(--line);
  border-radius:12px;padding:11px 14px;font-size:15px;font-weight:700;color:var(--pri2);margin-bottom:12px}
.dictate-btns{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:4px}
.dictate-btns .check{padding:7px 14px;font-size:14px}
.dictate-btns .check.lookup{background:#f59e0b}
.dictate-btns .check.lookup:hover{background:#d98708}
.dictate-badge{font-size:13px;font-weight:700;padding:3px 9px;border-radius:8px;background:var(--soft);color:var(--sub)}
.dictate-badge.ok{background:#dcfce7;color:#14532d}
.dictate-badge.bad{background:#fee2e2;color:#7f1d1d}
.dictate-badge.mid{background:#fef3c7;color:#b45309}

/* 进度 / 提示条 */
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);background:#111827cc;
  color:#fff;padding:10px 18px;border-radius:24px;font-size:14px;opacity:0;transition:.25s;pointer-events:none;z-index:50}
.toast.show{opacity:1}

.section-title{font-size:14px;font-weight:700;color:var(--sub);margin:14px 0 8px;
  border-left:4px solid var(--pri);padding-left:8px}
@media(max-width:520px){.hanzi-box{width:130px;height:130px}}

/* ---------- 汉字书写（仿第1-3课写字流程） ---------- */
.hw-word .ply.mute{background:var(--soft);color:#9aa3af;border-radius:50%;width:30px;height:30px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;border:none;cursor:default}
.hw-home{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;margin-bottom:12px}
.hw-row{display:flex;align-items:center;justify-content:space-between;font-size:14px}
.hw-row .sp{flex:1}
.hw-bar{height:10px;background:var(--soft);border-radius:6px;margin-top:8px;overflow:hidden}
.hw-bar i{display:block;height:100%;background:var(--pri);border-radius:6px;transition:width .3s}
.hw-chars{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0}
.hw-pill{background:var(--soft);border-radius:8px;padding:3px 8px;font-size:13px;color:var(--ink)}
.hw-pill.ok{background:#dcfce7;color:var(--ok)}
.hw-pill.warn{background:#fef3c7;color:#b45309}
.hw-pill.hot{background:#fee2e2;color:var(--no)}
.hw-pill.blue{background:#dbeafe;color:var(--pri2)}
.hw-pill.big{font-size:14px;padding:5px 12px;font-weight:700}
.hw-go{display:block;width:100%;margin-top:8px;background:var(--pri);color:#fff;border:0;border-radius:12px;
  padding:13px;font-size:16px;font-weight:700;cursor:pointer}
.hw-go:disabled{background:#c7d2fe;cursor:default}
.hw-clear{display:block;width:100%;margin-top:8px;background:none;border:1px solid var(--line);color:var(--sub);
  border-radius:10px;padding:8px;font-size:13px;cursor:pointer}
.hw-back{background:none;border:1px solid var(--line);color:var(--sub);border-radius:10px;padding:7px 14px;
  font-size:13px;cursor:pointer;margin-bottom:10px}
.hw-word{background:linear-gradient(140deg,#eef2ff,#ecfdf5);border:1px solid var(--line);border-radius:14px;
  padding:16px;text-align:center;margin-bottom:12px;position:relative}
.hw-word .lbl{font-size:12px;color:var(--sub)}
.hw-word .wz{font-size:30px;letter-spacing:6px;font-weight:600;margin:2px 0}
.hw-word .wz .hot{color:var(--no)}
.hw-word .py{color:var(--pri2);font-weight:600;font-size:15px}
.hw-word .en{color:var(--sub);font-size:12px}
.hw-word .ply{position:absolute;right:12px;top:12px}
.hw-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;text-align:center}
.hw-card .pills{justify-content:center;gap:8px;margin-bottom:12px;flex-wrap:wrap}
.hw-tian{width:230px;height:230px;margin:0 auto;border:2px solid #dbe3ee;border-radius:8px;
  background:
    linear-gradient(to right, transparent calc(50% - .5px), #dbe3ee calc(50% - .5px), #dbe3ee calc(50% + .5px), transparent calc(50% + .5px)),
    linear-gradient(to bottom, transparent calc(50% - .5px), #dbe3ee calc(50% - .5px), #dbe3ee calc(50% + .5px), transparent calc(50% + .5px)),
    #fff}
.hw-fb{min-height:26px;margin-top:10px;font-size:15px;font-weight:700}
.hw-btns{display:flex;gap:10px;margin-top:6px}
.hw-btn{flex:1;background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:9px;
  font-size:14px;cursor:pointer;color:var(--ink)}
.hw-btn:hover{background:#e0e7ff}
.hint-line.center{text-align:center}

/* 完成句子（课文原句）辅助行 */
.ex .p .en-line{font-size:12px;color:var(--muted,#8892a6);margin-top:2px;font-style:italic}
.ex .p .src-line{font-size:11px;color:#5b8def;margin-top:2px}