/* ===== 小学学习站 · 在线学习页样式 ===== */
:root{
  --bg:#FFF7EC; --panel:#FFFFFF; --primary:#FF8A3D; --primary-d:#F2721B;
  --teal:#1FB6A6; --yellow:#FFC83D; --pink:#FF6B8A; --ink:#3A3530; --muted:#9A9289;
  --line:#F0E6D6; --shadow:0 6px 20px rgba(255,138,61,.15);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;
}
.topbar{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:12px 18px;
  background:linear-gradient(100deg,var(--primary),var(--yellow));color:#fff;box-shadow:var(--shadow);
}
.logo{font-size:19px;font-weight:800;}
.sub{font-size:13px;opacity:.95;}
.link-back{margin-left:auto;color:#fff;font-size:13px;text-decoration:none;background:rgba(255,255,255,.2);padding:6px 12px;border-radius:12px;}
.wrap{max-width:760px;margin:0 auto;padding:16px;display:flex;flex-direction:column;gap:14px;}
.card{background:var(--panel);border-radius:18px;padding:16px;box-shadow:var(--shadow);}
.screen{}
.hidden{display:none!important;}
.scr-title{margin:0 0 12px;font-size:18px;font-weight:800;}
.hint{font-size:12px;color:var(--muted);margin:10px 0 0;}

/* 按钮 */
.btn{border:none;border-radius:14px;padding:10px 18px;font-size:15px;font-weight:700;cursor:pointer;background:#F3ECE1;color:var(--ink);transition:.15s;}
.btn:hover{transform:translateY(-1px);}
.btn.primary{background:linear-gradient(100deg,var(--primary),var(--primary-d));color:#fff;box-shadow:0 4px 14px rgba(255,138,61,.4);}
.btn.accent{background:linear-gradient(100deg,var(--teal),#159B8D);color:#fff;box-shadow:0 4px 14px rgba(31,182,166,.4);}
.btn.ghost{background:transparent;border:2px solid var(--line);}
.btn.big{padding:14px;font-size:16px;width:100%;}
.btn.sm{padding:7px 12px;font-size:13px;}

/* 登录/注册 */
.tabs{display:flex;gap:8px;margin-bottom:12px;}
.tab{border:none;background:#FFF3E2;color:var(--ink);padding:8px 16px;border-radius:12px;font-weight:700;cursor:pointer;}
.tab.on{background:var(--primary);color:#fff;}
.fld{display:flex;flex-direction:column;gap:6px;margin-bottom:12px;}
.fld label{font-size:13px;font-weight:700;}
.fld input{width:100%;padding:11px 12px;border:2px solid var(--line);border-radius:12px;font-size:15px;}
.parent-gate{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink);margin:4px 0 12px;}

/* 首页 */
.home-head{display:flex;align-items:center;justify-content:space-between;}
.fam{font-weight:800;font-size:15px;color:var(--primary-d);}
.child-switch{display:flex;gap:8px;flex-wrap:wrap;}
.child-chip{flex:1;min-width:90px;border:2px solid var(--line);background:#FFFDF9;border-radius:14px;padding:10px;text-align:center;cursor:pointer;font-weight:700;}
.child-chip.on{background:var(--primary);border-color:var(--primary);color:#fff;}
.pet-card{display:flex;align-items:center;gap:16px;}
.pet-box{width:120px;height:120px;flex:0 0 120px;display:flex;align-items:center;justify-content:center;background:linear-gradient(160deg,#FFF3E2,#E6F7F4);border-radius:20px;}
.pet-box svg{width:96px;height:96px;}
.pet-info{flex:1;}
.pet-name{font-size:20px;font-weight:800;}
.pet-stage{font-size:13px;color:var(--teal);font-weight:700;margin:2px 0 8px;}
.points-row{display:flex;align-items:baseline;gap:8px;}
.points-label{font-size:13px;color:var(--muted);}
.points-num{font-size:30px;font-weight:800;color:var(--primary-d);}
.home-btns{display:flex;flex-direction:column;gap:10px;}

/* 选择块 */
.sel-block{display:flex;flex-direction:column;gap:8px;margin-bottom:12px;}
.sel-block.inline{flex-direction:row;align-items:center;gap:10px;}
.sel-label{font-size:13px;font-weight:700;}
.chips{display:flex;flex-wrap:wrap;gap:8px;}
.chip{border:2px solid var(--line);background:#FFFDF9;color:var(--ink);padding:7px 13px;border-radius:14px;font-size:14px;cursor:pointer;transition:.15s;font-weight:600;}
.chip.on{background:var(--primary);border-color:var(--primary);color:#fff;}
.chip.dis{opacity:.4;cursor:not-allowed;text-decoration:line-through;}
#qUnits{max-height:240px;overflow:auto;}
.unit{border:2px solid var(--line);border-radius:14px;margin-bottom:8px;overflow:hidden;background:#FFFDF9;}
.unit-head{display:flex;align-items:center;gap:8px;padding:10px 12px;cursor:pointer;background:linear-gradient(90deg,#FFF3E2,#FFFDF9);font-weight:700;font-size:14px;}
.unit-head .all{margin-left:auto;font-size:12px;color:var(--teal);font-weight:600;}
#qCount{width:84px;padding:8px 10px;border:2px solid var(--line);border-radius:12px;font-size:15px;font-weight:700;text-align:center;}

/* 答题 */
.quiz-progress{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:700;}
.bar{flex:1;height:8px;background:var(--line);border-radius:6px;overflow:hidden;}
.bar i{display:block;height:100%;width:0;background:linear-gradient(100deg,var(--primary),var(--yellow));transition:.2s;}
.q-card{padding:18px;}
.q-stem{font-size:18px;line-height:1.6;margin-bottom:14px;white-space:pre-wrap;}
.q-input{width:100%;padding:12px;border:2px solid var(--line);border-radius:12px;font-size:17px;}
.q-actions{display:flex;justify-content:space-between;margin-top:14px;}
.result-sum{font-size:16px;font-weight:800;margin-bottom:10px;}
.result-list{display:flex;flex-direction:column;gap:8px;margin-bottom:14px;}
.result-item{border:2px solid var(--line);border-radius:12px;padding:10px 12px;font-size:14px;}
.result-item.wrong{border-color:#FFC9C9;background:#FFF5F5;}
.result-item .rq{font-weight:700;}
.result-item .ra{color:var(--teal);}
.result-item .rs{color:var(--primary-d);}
.result-item .ex-btn{margin-top:6px;}

/* 奖励 */
.reward-list{display:flex;flex-direction:column;gap:10px;}
.reward-item{border:2px solid var(--line);border-radius:14px;padding:12px;display:flex;align-items:center;gap:10px;background:#FFFDF9;}
.reward-item .rw-name{font-weight:700;flex:1;}
.reward-item .rw-cost{color:var(--primary-d);font-weight:800;}

/* 弹窗 */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.4);display:flex;align-items:center;justify-content:center;padding:20px;z-index:50;}
.modal-box{max-width:520px;width:100%;}
.explain-text{font-size:15px;line-height:1.7;white-space:pre-wrap;margin:10px 0 14px;background:#FAF6EF;padding:12px;border-radius:12px;}

/* AI 拍照批改 */
.ocr-preview{margin-top:12px;}
.ocr-img{width:100%;border-radius:14px;border:2px solid var(--line);}
.ocr-result{margin-top:14px;display:flex;flex-direction:column;gap:8px;}
.ocr-sum{font-size:20px;font-weight:800;color:var(--ink);text-align:center;padding:8px 0;}
.ocr-sum .ok-num{color:var(--primary-d);font-size:30px;}
.ocr-item{border:2px solid var(--line);border-radius:12px;padding:10px 12px;font-size:14px;background:#FFFDF9;}
.ocr-item.ok{border-color:#BFE8C9;background:#F3FBF4;}
.ocr-item.no{border-color:#FFC9C9;background:#FFF5F5;}
.ocr-q{font-weight:700;margin-bottom:4px;}
.ocr-line{font-size:13px;}
.ocr-note{font-size:12px;color:var(--muted);margin-top:4px;}

/* 动效 */
.pet-box{animation:petFloat 3s ease-in-out infinite;}
@keyframes petFloat{0%,100%{transform:translateY(0);}50%{transform:translateY(-6px);}}
.card{animation:cardIn .35s ease both;}
@keyframes cardIn{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:none;}}
.btn,.chip,.tab,.child-chip{transition:transform .15s,box-shadow .15s,border-color .15s,background .15s;}
.btn:hover,.chip.on:hover,.tab:hover{transform:translateY(-2px);}
.bar i{transition:width .4s ease;}
.big-num{display:inline-block;animation:pop .5s ease;}
@keyframes pop{0%{transform:scale(.6);}60%{transform:scale(1.12);}100%{transform:scale(1);}}

@media(max-width:560px){
  .pet-card{flex-direction:column;text-align:center;}
  .pet-info{text-align:center;}
}

/* ===== 补齐：与 learn.js 实际类名对齐 ===== */
.pet-box{font-size:60px;line-height:1;}
.chip.add{background:#EAF7F4;border-color:var(--teal);color:var(--teal);}
.field{margin-bottom:12px;}
.field input{width:100%;padding:11px 12px;border:2px solid var(--line);border-radius:12px;font-size:15px;}
.chk{display:flex;align-items:center;gap:8px;font-size:13px;margin:4px 0 12px;cursor:pointer;}
.unit-chk{display:flex;align-items:center;gap:8px;padding:9px 12px;border:2px solid var(--line);border-radius:12px;margin-bottom:6px;background:#FFFDF9;font-size:14px;cursor:pointer;}
.unit-chk input{width:18px;height:18px;}
.res-card{border:2px solid var(--line);border-radius:12px;padding:10px 12px;background:#FFFDF9;margin-bottom:8px;}
.res-card.ok{border-color:#BFE8C9;background:#F3FBF4;}
.res-card.no{border-color:#FFC9C9;background:#FFF5F5;}
.res-stem{font-weight:700;}
.res-ans{font-size:13px;color:var(--muted);margin:4px 0;}
.big-num{font-size:30px;font-weight:800;color:var(--primary-d);}
.res-line{font-size:14px;margin:4px 0;}
.reward-card{display:flex;align-items:center;gap:10px;border:2px solid var(--line);border-radius:14px;padding:12px;background:#FFFDF9;}
.rw-name{font-weight:700;flex:1;}
.rw-cost{color:var(--primary-d);font-weight:800;}
.toast{position:fixed;left:50%;bottom:32px;transform:translateX(-50%) translateY(20px);background:rgba(58,53,48,.95);color:#fff;padding:11px 18px;border-radius:14px;font-size:14px;font-weight:600;opacity:0;transition:.3s;z-index:99;pointer-events:none;max-width:80%;text-align:center;}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}