/* LearnUp 练习引擎样式 — 配合 lu-practice.js */
.lp{--pa:var(--lu-a,#8A5A00);--ps:#FBF4E6;font-size:1rem}
.lp .lp-g{display:inline-block;background:var(--pa);color:#fff;border-radius:8px;padding:1px 10px;font-weight:900;font-size:.85rem;margin-right:6px}
.lp .lp-mk{float:right;color:#6B7280;font-size:.85rem;font-weight:700}
.lp .lp-q{font-weight:800;font-size:1.05rem;margin:6px 0 8px;line-height:1.5}
.lp .lp-box{border:1.5px solid #D6D3D1;border-radius:10px;padding:6px 12px;margin:6px 0;background:#fff;font-size:.95rem}
.lp .lp-roman{margin:4px 0 8px;padding-left:4px;font-size:.95rem;line-height:1.6}
.lp .lp-opts-g{display:grid;gap:6px}
.lp .lp-opt{display:flex;gap:10px;align-items:flex-start;width:100%;min-height:44px;border:2px solid #E7E5E4;background:#fff;border-radius:12px;padding:8px 12px;font:inherit;font-weight:700;text-align:left;cursor:pointer;color:inherit}
.lp .lp-opt b{color:var(--pa)}
.lp .lp-opt.right{border-color:#15803D;background:#ECF8F0}
.lp .lp-opt.wrong{border-color:#DC2626;background:#FEF2F2;opacity:.8}
.lp .lp-fb{margin-top:8px;font-weight:800;min-height:1.4em}
.lp .lp-fb.ok{color:#15803D}.lp .lp-fb.no{color:#B91C1C}
.lp .lp-row{display:flex;gap:8px;align-items:center;border-bottom:1px solid #EEE;padding:6px 0;font-size:.93rem;line-height:1.45}
.lp .lp-row .lp-n{font-weight:900;color:var(--pa);min-width:1.6em}
.lp .lp-row .lp-t{flex:1}
.lp .lp-tfb{width:40px;height:36px;border-radius:10px;border:2px solid #E7E5E4;background:#fff;font-size:1.1rem;font-weight:900;cursor:pointer}
.lp .lp-tfb.on{border-color:var(--pa);background:var(--ps)}
.lp .lp-row.right{background:#F0FDF4}.lp .lp-row.wrong{background:#FEF2F2}
.lp .lp-ans{font-size:.8rem;color:#B91C1C;font-weight:800;white-space:nowrap}
.lp .lp-circle{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;padding:10px;border:2px dashed #D6D3D1;border-radius:50% / 30%;margin:6px 0}
.lp .lp-center{width:100%;text-align:center;font-weight:900;color:var(--pa)}
.lp .lp-chip{border:2px solid #E7E5E4;background:#fff;border-radius:999px;padding:6px 12px;font:inherit;font-size:.92rem;font-weight:700;cursor:pointer;color:inherit}
.lp .lp-chip.on{border-color:var(--pa);background:var(--ps);box-shadow:0 0 0 3px var(--ps)}
.lp .lp-chip.right{border-color:#15803D;background:#ECF8F0}.lp .lp-chip.wrong{border-color:#DC2626;background:#FEF2F2}.lp .lp-chip.miss{border-style:dashed;border-color:#15803D}
.lp .lp-bank{display:flex;flex-wrap:wrap;gap:6px;background:var(--ps);border-radius:12px;padding:8px;margin:4px 0 8px}
.lp .lp-word{border:1.5px solid #D6D3D1;background:#fff;border-radius:8px;padding:4px 10px;font:inherit;font-size:.92rem;font-weight:700;cursor:pointer;color:inherit}
.lp .lp-word.used{opacity:.35;text-decoration:line-through}
.lp .lp-fl{margin:4px 0;font-size:.95rem;line-height:1.9}
.lp .lp-blank{display:inline-block;min-width:5em;border-bottom:2px solid var(--pa);text-align:center;font-weight:800;cursor:pointer;padding:0 4px;color:var(--pa)}
.lp .lp-blank.act{background:var(--ps);border-radius:6px}
.lp .lp-blank.right{color:#15803D;border-color:#15803D}.lp .lp-blank.wrong{color:#B91C1C;border-color:#B91C1C;text-decoration:line-through}
.lp .lp-fix{color:#15803D;font-weight:900;margin-left:4px}
.lp .lp-match{display:grid;grid-template-columns:1fr 1.25fr;gap:8px;align-items:start}
.lp .lp-l,.lp .lp-r{border:2px solid #E7E5E4;border-radius:10px;padding:6px 8px;background:#fff;cursor:pointer;font-size:.88rem;line-height:1.4;margin-bottom:6px}
.lp .lp-l b,.lp .lp-r b{color:var(--pa)}
.lp .lp-l.act{border-color:var(--pa);background:var(--ps)}
.lp .lp-tag{display:block;font-weight:900;color:var(--pa);font-size:.82rem}
.lp .lp-l.right{border-color:#15803D;background:#F0FDF4}.lp .lp-l.wrong{border-color:#DC2626;background:#FEF2F2}
.lp .lp-l.wrong .lp-tag{color:#15803D}
.lp .lp-hint{font-size:.82rem;color:#6B7280;margin:2px 0 6px}
.lp .lp-part{border-top:1px dashed #E7E5E4;padding-top:6px;margin-top:6px}
.lp .lp-part .lp-pq{font-weight:800;font-size:.95rem;line-height:1.5}
.lp textarea{width:100%;min-height:52px;border:2px solid #E7E5E4;border-radius:10px;padding:6px 10px;font:inherit;font-size:.95rem;margin-top:4px;resize:vertical}
.lp .lp-pfb{font-weight:800;color:var(--pa);font-size:.85rem}
.lp .lp-model{background:#F0FDF4;border-radius:10px;padding:6px 10px;margin-top:4px;font-size:.88rem}
.lp .lp-model ul{margin:2px 0;padding-left:1.2em}
.lp .lp-pt.hit{color:#15803D;font-weight:900}.lp .lp-pt.hit::after{content:' ✓'}
.lp .lp-photo{font-size:.78rem;color:#6B7280;margin-top:4px}
.lp .lp-choose{line-height:2}
.lp .lp-opts{display:inline-flex;gap:4px;margin:0 2px}
.lp .lp-c{border:1.5px solid #D6D3D1;border-radius:999px;background:#fff;padding:0 10px;font:inherit;font-size:.9rem;cursor:pointer;color:inherit}
.lp .lp-c.on{border-color:var(--pa);background:var(--ps);font-weight:900}
.lp .lp-opts.right .lp-c.on{border-color:#15803D;background:#ECF8F0}.lp .lp-opts.wrong .lp-c.on{border-color:#DC2626;background:#FEF2F2}
.lp .lp-act{display:flex;gap:8px;margin-top:8px;flex-wrap:wrap}
.lp .lp-check,.lp .lp-again{border-radius:999px;padding:8px 18px;font:inherit;font-weight:800;cursor:pointer;border:2px solid var(--pa)}
.lp .lp-check{background:var(--pa);color:#fff}.lp .lp-check:disabled{opacity:.4}
.lp .lp-again{background:#fff;color:var(--pa)}
.lp-total{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:10px 0}
.lp-total div{background:#fff;border-radius:12px;padding:10px;text-align:center;box-shadow:0 2px 8px rgba(0,0,0,.06)}
.lp-total b{display:block;color:var(--lu-a,#8A5A00)}.lp-total span{font-size:1.3rem;font-weight:900}
.lp-total p{grid-column:1/-1;margin:0;text-align:center;color:#6B7280;font-size:.9rem}
/* 2026-10-08 手机一屏：是非题按钮叠放、卡片与行距收紧 */
.lp .lp-tfbs{display:flex;gap:6px;flex:none}
.lp .lp-ans{display:block}
.lp .lp-ans:empty{display:none}
@media (max-width:600px){
 .lp.v2-content{padding:10px 12px!important}
 .lp .lp-q{font-size:.98rem;margin:2px 0 4px}
 .lp .lp-hint{font-size:.76rem;margin:0 0 4px}
 .lp .lp-row{font-size:.86rem;padding:4px 0;gap:6px;line-height:1.38}
 .lp .lp-tfbs{flex-direction:column;gap:4px}
 .lp .lp-tfb{width:36px;height:30px;font-size:1rem}
 .lp .lp-bank{gap:5px;padding:6px;margin:2px 0 4px}
 .lp .lp-word{padding:3px 8px;font-size:.86rem}
 .lp .lp-fl{font-size:.88rem;line-height:1.6;margin:3px 0}
 .lp .lp-blank{min-width:4em}
 .lp .lp-l,.lp .lp-r{font-size:.82rem;padding:5px 7px;margin-bottom:5px}
 .lp .lp-act{margin-top:6px}
 .lp .lp-check,.lp .lp-again{padding:6px 16px}
 .lp textarea{min-height:44px}
}
.lp .lp-see{border:0;background:none;color:var(--pa);font:inherit;font-weight:900;text-decoration:underline;cursor:pointer;padding:0 2px}
.lp-sheet{position:fixed;inset:0;z-index:60;background:#0006;display:flex;align-items:flex-end;justify-content:center}
.lp-sheet[hidden]{display:none}
.lp-sbox{width:min(720px,100%);max-height:75vh;overflow:auto;background:#fff;border-radius:20px 20px 0 0;padding:16px 18px calc(16px + env(safe-area-inset-bottom));font-size:1rem;line-height:1.7}
.lp-sbox ul{padding-left:1.2em;margin:4px 0 8px}
.lp-sbox .lp-pt.hit{color:#15803D;font-weight:900}.lp-sbox .lp-pt.hit::after{content:' ✓ 你答到了'}
.lp-sclose{margin-top:10px;border-radius:999px;padding:10px 20px;font:inherit;font-weight:800;border:2px solid var(--lu-a,#8A5A00);background:#fff;color:var(--lu-a,#8A5A00);min-height:46px}
@media(min-width:900px){.lp-sheet{align-items:center}.lp-sbox{border-radius:20px}}
@media (max-width:600px){.lp .lp-part{padding-top:3px;margin-top:4px}.lp textarea{min-height:40px;margin-top:2px;padding:5px 8px}.lp .lp-part .lp-pq{font-size:.9rem}.lp .lp-photo{margin-top:2px}}
/* 2026-10-08 检查后不撑高：是非题用绿框标出正确按钮；配对的结果标签不另起一行 */
.lp .lp-tfb.should{border-color:#15803D;background:#ECF8F0;box-shadow:0 0 0 2px #BBF7D0}
.lp .lp-tag{display:inline;margin-left:4px}
.lp .lp-blank.fixed{color:#15803D;border-bottom:2px dashed #DC2626}
.lp .lp-match.wideL{grid-template-columns:1.35fr 1fr}
@media (max-width:600px){.lp .lp-blank.fixed,.lp .lp-blank.right{font-size:.8rem}.lp .lp-fl{line-height:1.55}.lp .lp-row{padding:3px 0}}
.lp .lp-q{padding-right:64px}
/* 数学题型（2026-10-09）：num 写答案、pick 每行圈选、解题步骤 */
.lp .lp-hint{color:#57534E;font-size:.9rem;margin:2px 0 8px}
.lp .lp-it{display:flex;gap:8px;align-items:flex-start;padding:8px 6px;border-bottom:1px solid #EEE;line-height:2}
.lp .lp-it>.lp-n{font-weight:900;color:var(--pa);min-width:1.8em;line-height:2}
.lp .lp-it>.lp-t{flex:1;min-width:0}
.lp .lp-it.right{background:#F0FDF4}.lp .lp-it.wrong{background:#FEF2F2}
.lp .lp-in{font:inherit;font-weight:800;width:6.5em;max-width:100%;min-height:38px;padding:2px 8px;border:2px solid #D6D3D1;border-radius:10px;text-align:center;background:#fff;color:inherit}
.lp .lp-in.w{width:8.6em}.lp .lp-in.s{width:4.5em}
.lp .lp-in:focus{outline:none;border-color:var(--pa);box-shadow:0 0 0 3px var(--ps)}
.lp .lp-in.right{border-color:#15803D;background:#ECF8F0}.lp .lp-in.wrong{border-color:#DC2626;background:#FEF2F2}
.lp .lp-should{display:inline-block;margin-left:6px;color:#15803D;font-weight:900;font-size:.9rem}
.lp .lp-u{font-weight:700;margin:0 4px}
.lp .lp-seq{font-weight:700;letter-spacing:.01em}
.lp .lp-prow{display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center;padding:8px 6px;border-bottom:1px solid #EEE}
.lp .lp-prow .lp-n{font-weight:900;color:var(--pa);min-width:1.8em}
.lp .lp-prow .lp-t{flex:1 1 100%;font-weight:700}
.lp .lp-prow .lp-pks{display:flex;flex-wrap:wrap;gap:6px;padding-left:2.3em}
.lp .lp-pk{border:2px dashed #D6D3D1;background:#fff;border-radius:12px;padding:6px 12px;font:inherit;font-size:.95rem;font-weight:700;cursor:pointer;color:inherit}
.lp .lp-pk.on{border-style:solid;border-color:var(--pa);background:var(--ps);border-radius:999px}
.lp .lp-prow.right .lp-pk.on{border-color:#15803D;background:#ECF8F0}.lp .lp-prow.wrong .lp-pk.on{border-color:#DC2626;background:#FEF2F2}
.lp .lp-pk.should{border:2px solid #15803D;border-radius:999px}
.lp .lp-work{display:block;width:100%;margin:6px 0;font:inherit;font-size:.92rem;border:1.5px dashed #D6D3D1;border-radius:10px;padding:6px 10px;min-height:2.6em;background:#FAFAF9;color:inherit}
.lp .lp-steps{margin-top:8px;padding:8px 12px;border-left:4px solid var(--pa);background:var(--ps);border-radius:10px;font-size:.93rem;line-height:1.7}
.lp .lp-steps b{color:var(--pa)}
.lp .lp-ans-line{margin-top:6px;font-weight:700}
.lp .lp-tbl{border-collapse:collapse;margin:6px 0;font-size:.92rem}.lp .lp-tbl td,.lp .lp-tbl th{border:1.5px solid #D6D3D1;padding:4px 10px;text-align:center}
.lp .fraction{display:inline-flex;flex-direction:column;vertical-align:middle;text-align:center;line-height:1.05;font-size:.92em;margin:0 2px}
.lp .fraction>span:first-child{border-bottom:1.5px solid currentColor;padding:0 2px}
.lp .mixed{white-space:nowrap}
.lp .lp-it>.lp-t{overflow-wrap:anywhere}
@media(max-width:420px){.lp .lp-in{width:5.6em;font-size:.95rem}.lp .lp-in.w{width:7.4em}.lp .lp-it{padding:6px 2px}}
.lp .lp-pk-h{padding:4px;border-radius:12px}.lp .lp-pk-h svg{display:block;width:96px;height:96px}
.lp .lp-pk.lp-pk-h.on{border-radius:14px}
.lp .lp-model2{margin-top:8px;padding:8px;border:1.5px dashed #15803D;border-radius:12px;background:#F7FDF9}
.lp .lp-model2 svg{max-width:100%;height:auto}
.lp .lp-selfs{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}
.lp .lp-self{border:2px solid #D6D3D1;background:#fff;border-radius:999px;padding:6px 14px;font:inherit;font-weight:800;cursor:pointer}
.lp .lp-self.on[data-v="1"]{border-color:#15803D;background:#ECF8F0}.lp .lp-self.on[data-v="0"]{border-color:#B45309;background:#FFF7ED}
.lp .lp-prot{margin:6px 0;user-select:none;-webkit-user-select:none}
.lp .lp-ang.right{background:#F0FDF4}.lp .lp-ang.wrong{background:#FEF2F2}
.lp .lp-box svg{max-width:100%;height:auto}
.lp>[data-lp]{align-self:stretch;width:100%;box-sizing:border-box}.lp .lp-items,.lp .lp-picks{width:100%}.lp .lp-it,.lp .lp-prow{box-sizing:border-box;width:100%}
.lp .lp-box table{border-collapse:collapse;margin:4px 0}.lp .lp-box td,.lp .lp-box th{border:1px solid #D6D3D1;padding:3px 8px;text-align:center}
/* 列式计算（2026-10-09） */
.lp .lp-calc{margin:6px 0;padding:6px 8px;border:1.5px solid #D6D3D1;border-radius:12px;background:#FAFAF9}
.lp .lp-calc-h{font-weight:800;font-size:.9rem;color:var(--pa)}.lp .lp-calc-h small{font-weight:600;color:#78716C}
.lp .lp-r2{display:flex;align-items:center;gap:6px;margin:4px 0}
.lp .lp-sx{flex:1;min-width:0;font:inherit;font-size:1rem;font-weight:700;padding:6px 10px;border:1.5px solid #D6D3D1;border-radius:10px;background:#fff;color:inherit}
.lp .lp-sx:focus{outline:none;border-color:var(--pa);box-shadow:0 0 0 3px var(--ps)}
.lp .lp-r2.ok .lp-sx{border-color:#15803D;background:#F0FDF4}.lp .lp-r2.bad .lp-sx{border-color:#DC2626;background:#FEF2F2}
.lp .lp-rm{min-width:1.2em;font-weight:900;font-size:.85rem;white-space:nowrap}.lp .lp-r2.ok .lp-rm{color:#15803D}.lp .lp-r2.bad .lp-rm{color:#B91C1C}
.lp .lp-calc-b{display:flex;gap:6px;flex-wrap:wrap}
.lp .lp-addrow,.lp .lp-kbd{border:1.5px dashed #A8A29E;background:#fff;border-radius:999px;padding:3px 12px;font:inherit;font-size:.85rem;font-weight:700;cursor:pointer;color:#57534E}
.lp .lp-cnote{margin:4px 0 0;font-weight:800;font-size:.88rem;color:#57534E}
.lp-kp{position:fixed;left:0;right:0;bottom:0;z-index:60;display:grid;grid-template-columns:repeat(5,1fr);gap:5px;padding:6px 8px calc(8px + env(safe-area-inset-bottom));background:#E7E5E4;box-shadow:0 -4px 16px rgba(0,0,0,.15)}
.lp-kp[hidden]{display:none}
.lp-kp button{min-height:42px;border:0;border-radius:10px;background:#fff;font:inherit;font-size:1.1rem;font-weight:800;cursor:pointer;color:#1C1917}
.lp-kp button.w{font-size:.85rem}
@media(min-width:700px){.lp-kp{left:50%;right:auto;transform:translateX(-50%);width:420px;border-radius:14px 14px 0 0}}
.lp .lp-calc{overflow:hidden}.lp .lp-calc-h small{display:block}
.v2-main{overflow-x:hidden}
.kp-on .v2-main .screen.active{padding-bottom:300px!important}
.lp .lp-sx{width:0}.v2-content.lp{box-sizing:border-box;max-width:100%}
/* 英文／国语（2026-10-09） */
.lp .lp-passage{max-height:40vh;overflow:auto;line-height:1.6;font-size:.95rem}
.lp .lp-pks-v{flex-direction:column;align-items:stretch;padding-left:2.3em}.lp .lp-pks-v .lp-pk{text-align:left}
.lp .lp-wta{display:block;width:100%;box-sizing:border-box;margin:6px 0 2px;font:inherit;font-size:.98rem;line-height:1.55;border:1.5px solid #D6D3D1;border-radius:10px;padding:8px 10px;background:#fff;color:inherit}
.lp .lp-wc{font-size:.8rem;color:#78716C;text-align:right}
.lp .lp-wmodel{margin:4px 0 8px;padding:6px 10px;background:#fff;border-radius:8px;line-height:1.6}
.lp .lp-ck{display:flex;gap:8px;align-items:flex-start;margin:4px 0;font-size:.93rem}.lp .lp-ck input{width:20px;height:20px;flex:none;margin-top:2px}
.lp .lp-write.right{background:#F0FDF4}.lp .lp-write.wrong{background:#FFF7ED}
.lu-hub{display:grid;gap:8px;margin-top:8px}.lu-hub-l{display:grid;grid-template-columns:1fr auto;gap:2px 8px;padding:12px 14px;border:1.5px solid var(--lu-soft,#D6D3D1);border-radius:14px;background:#fff;text-decoration:none;color:inherit}
.lu-hub-l b{grid-column:1}.lu-hub-l span{grid-column:1;color:#78716C;font-size:.85rem}.lu-hub-l em{grid-column:2;grid-row:1/3;align-self:center;font-style:normal;font-weight:800;color:var(--lu-a)}
.lp .lp-wdone{border:2px solid var(--pa);background:#fff;border-radius:999px;padding:6px 14px;font:inherit;font-weight:800;cursor:pointer;margin-top:6px}
.lp .lp-passage{display:block;width:100%;box-sizing:border-box}
.lp .lp-in.xl{display:block;width:100%;max-width:100%;box-sizing:border-box;text-align:left;margin:4px 0}

/* P5 科学：screen 的 padding 算进高度（Claude 2026-10-10） */
.v2-main .screen{box-sizing:border-box}
/* P5 科学练习页：手机／小屏紧凑版，让一屏放得下（Claude 2026-10-10） */
@media (max-width:600px),(max-height:700px){
 .lp{font-size:.93rem;line-height:1.45}
 .v2-main .screen{padding-top:6px!important;padding-bottom:8px!important}
 .v2-content.card.lp{padding:10px 12px}
 .lp-q{font-size:.95rem;margin:0 0 4px;line-height:1.4}
 .lp-hint{margin:2px 0;font-size:.85rem}
 .lp-box{font-size:.86rem;padding:4px 8px;margin:4px 0;line-height:1.4}
 .lp-box p{margin:2px 0}
 .lp-box td,.lp .lp-box th{padding:2px 5px}
 .lp-opts-g{gap:4px}
 .lp-opt{min-height:38px;padding:5px 9px;border-radius:10px}
 .lp-act{margin-top:6px}
 .lp ul{margin:4px 0;padding-left:18px}.lp ul li{margin:0;line-height:1.35;font-size:.86rem}
}
.lp ul:has(li:nth-child(9)){columns:2;column-gap:14px}
.lp-chips{display:flex;flex-wrap:wrap;gap:5px;margin:6px 0}.lp-chips span{border:1.5px solid #E7E5E4;border-radius:999px;padding:2px 9px;font-size:.85rem;background:#fff}.lp-chips b{color:var(--pa)}
.lp-total:has(div:nth-child(10)){grid-template-columns:repeat(6,1fr);gap:4px}
.lp-total:has(div:nth-child(10)) div{padding:4px 2px;border-radius:8px}
.lp-total:has(div:nth-child(10)) span{font-size:.95rem}
@media (max-width:600px){.lp-total:has(div:nth-child(10)){grid-template-columns:repeat(5,1fr)}}
@media (max-width:600px),(max-height:700px){
 .lp-in{min-height:30px;width:4.8em;padding:1px 6px}.lp-in.w{width:6.4em}
 .lp textarea{min-height:34px}
 .lp-box table{font-size:.8rem;margin:2px 0}.lp-box td,.lp .lp-box th{padding:1px 4px;line-height:1.3}
 .lp-act{margin-top:4px}.lp-act button{min-height:38px}
}
@media (max-width:600px),(max-height:700px){.lp-in.s{width:3.4em}}