:root{
  --bg:#f4f5f7; --card:#ffffff; --ink:#2c2c2e; --sub:#7a7a80; --line:#e6e6ea;
  --brand:#534ab7; --brand-weak:#eeedfe;
  --coral:#d85a30; --coral-weak:#faece7;
  --teal:#0f6e56; --teal-weak:#e1f5ee;
  --amber:#854f0b; --amber-weak:#faeeda;
  --blue:#185fa5; --blue-weak:#e6f1fb;
  --green:#3b6d11; --red:#a32d2d;
  --radius:12px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--ink);font-size:14px;line-height:1.6}
button{font-family:inherit}

.top{position:sticky;top:0;z-index:20;background:var(--card);border-bottom:1px solid var(--line)}
.top-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 16px 4px;flex-wrap:wrap}
.brand{font-weight:600;font-size:15px;display:flex;align-items:center;gap:8px}
.brand-logo{width:26px;height:26px;border-radius:7px;object-fit:cover;box-shadow:0 1px 3px rgba(0,0,0,.08)}
.child-switch{display:flex;gap:8px;flex-wrap:wrap;align-items:stretch}
.kc-row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.kc-cube{display:flex;align-items:center;gap:8px;border:1.5px solid var(--line);background:#fff;border-radius:14px;padding:6px 12px 6px 6px;cursor:pointer;transition:.15s;text-align:left}
.kc-cube:hover{border-color:#ffd97a;background:#fff8e3}
.kc-cube.on{background:linear-gradient(135deg,#fff8e3,#ffeec0);border-color:#ffb53a;box-shadow:0 2px 8px rgba(255,181,58,.18)}
.kc-cube .kc-ico{font-size:24px;line-height:1;width:34px;height:34px;display:flex;align-items:center;justify-content:center;background:#fff8e3;border-radius:10px}
.kc-cube.on .kc-ico{background:#fff}
.kc-cube .kc-body{display:flex;flex-direction:column;gap:2px}
.kc-cube .kc-name{font-size:13px;font-weight:600;color:var(--ink);display:flex;align-items:center;gap:4px}
.kc-cube .kc-grade{font-size:11px;color:var(--sub);background:#fff;border:1px solid var(--line);border-radius:999px;padding:0 6px;font-weight:400}
.kc-cube .kc-stats{display:flex;gap:8px;font-size:11px;font-variant-numeric:tabular-nums}
.kc-go{display:inline-flex;align-items:center;border:1.5px dashed var(--line);border-radius:14px;padding:6px 10px;font-size:12px;color:var(--sub);text-decoration:none;background:#fff}
.kc-go:hover{border-color:#ffb53a;color:#cf8410}
@media(max-width:540px){.kc-row{width:100%}.kc-cube{flex:1 1 calc(50% - 6px)}.kc-go{flex:1 1 100%;justify-content:center}}

.tabs{display:flex;gap:2px;padding:6px 10px 0;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{flex:0 0 auto;border:none;background:none;padding:8px 14px 10px;font-size:14px;color:var(--sub);cursor:pointer;border-bottom:2.5px solid transparent;white-space:nowrap}
.tab.on{color:var(--brand);font-weight:600;border-bottom-color:var(--brand)}

main{max-width:1000px;margin:0 auto;padding:16px 16px 60px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:14px}
.card h3{font-size:14px;font-weight:600;margin-bottom:10px;display:flex;align-items:center;justify-content:space-between;gap:8px}
.card h3 .more{font-size:12px;color:var(--sub);font-weight:400}
.card.hero{background:linear-gradient(135deg,#fff8e3 0%,#ffffff 60%);border-color:#ffe0a0}
.hero-row{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.hero-ico{font-size:32px;line-height:1}
.hero-body{flex:1}
.hero-name{font-size:17px;font-weight:700;color:var(--ink)}
.hero-tag{font-size:12px;color:var(--sub)}

.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media(max-width:720px){.grid2,.grid3,.grid4{grid-template-columns:1fr 1fr}}
@media(max-width:420px){.grid2,.grid3,.grid4{grid-template-columns:1fr}}

.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.stat .num{font-size:26px;font-weight:700;font-variant-numeric:tabular-nums}
.stat .lbl{font-size:12px;color:var(--sub);margin-top:2px}
.stat .trend{font-size:11px;margin-top:4px}
.up{color:#c23a1d}.down{color:#1c7a43}

.btn{background:var(--brand);color:#fff;border:none;border-radius:8px;padding:8px 16px;font-size:13px;cursor:pointer}
.btn:hover{opacity:.9}
.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.btn.ghost2{background:#fff;color:var(--sub);border:1px solid var(--line)}
.btn.danger{background:#fff;color:var(--red);border:1px solid #f0c9c9}
.btn.sm{padding:4px 10px;font-size:12px;border-radius:6px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}

.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}
.fld{display:flex;flex-direction:column;gap:4px;min-width:120px}
.fld.grow{flex:1;min-width:160px}
.fld label{font-size:12px;color:var(--sub)}
.fld input,.fld select,.fld textarea{border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:14px;font-family:inherit;background:#fff;color:var(--ink);width:100%}
.fld textarea{min-height:80px;resize:vertical}
.fld input:focus,.fld select:focus,.fld textarea:focus{outline:2px solid var(--brand-weak);border-color:var(--brand)}

.chip{display:inline-block;font-size:11px;padding:2px 8px;border-radius:999px;background:var(--brand-weak);color:var(--brand);margin-right:4px;vertical-align:middle}
.chip.yu{background:var(--coral-weak);color:var(--coral)}
.chip.shu{background:var(--blue-weak);color:var(--blue)}
.chip.ying{background:var(--teal-weak);color:var(--teal)}
.chip.warn{background:var(--amber-weak);color:var(--amber)}
.chip.gray{background:#f1efe8;color:#5f5e5a}

.list-item{border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-bottom:10px;background:#fff}
.list-item .head{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-bottom:6px}
.list-item .body{font-size:14px;white-space:pre-wrap;word-break:break-word;color:var(--ink)}
.list-item .meta{font-size:12px;color:var(--sub);margin-top:6px;display:flex;gap:10px;flex-wrap:wrap}
.list-item .ops{margin-top:8px;display:flex;gap:6px;flex-wrap:wrap}
.photo-thumb{max-width:100%;max-height:180px;border-radius:8px;margin-top:8px;border:1px solid var(--line);cursor:zoom-in}
.img-full{max-width:92vw;max-height:80vh;border-radius:8px}

.empty{padding:30px;text-align:center;color:var(--sub);font-size:13px}
.divider{height:1px;background:var(--line);margin:12px 0}

table.tbl{width:100%;border-collapse:collapse;font-size:13px}
table.tbl th,table.tbl td{padding:8px 6px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}
table.tbl th{color:var(--sub);font-weight:500;font-size:12px}
.tbl-wrap{overflow-x:auto}

.modal-mask{position:fixed;inset:0;background:rgba(30,30,40,.45);z-index:50;display:flex;align-items:flex-start;justify-content:center;padding:20px 12px;overflow:auto}
[hidden]{display:none!important}
.modal{background:#fff;border-radius:14px;max-width:680px;width:100%;padding:20px;margin:auto;max-height:92vh;overflow:auto}
.modal h3{font-size:15px;font-weight:600;margin-bottom:14px}
.modal .close-x{float:right;border:none;background:none;font-size:18px;color:var(--sub);cursor:pointer}

.toast{position:fixed;left:50%;bottom:36px;transform:translateX(-50%);background:#2c2c2e;color:#fff;padding:9px 20px;border-radius:999px;font-size:13px;z-index:99;box-shadow:0 4px 16px rgba(0,0,0,.2)}

.practice{background:#fff;border-radius:14px;padding:20px;max-width:640px;margin:0 auto}
.practice .q-no{color:var(--sub);font-size:12px;margin-bottom:8px}
.practice .q-txt{font-size:18px;line-height:1.7;margin:14px 0;white-space:pre-wrap}
.practice .ans-txt{background:#f7f7f4;border-radius:8px;padding:10px 12px;margin:10px 0;white-space:pre-wrap}
.practice input.ansin{border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-size:16px;width:100%}
.practice .verdict{font-size:14px;margin:8px 0}
.verdict.ok{color:var(--green)}.verdict.bad{color:var(--red)}
.progress-dots{display:flex;gap:5px;flex-wrap:wrap;margin:10px 0}
.pdot{width:10px;height:10px;border-radius:50%;background:#e3e3e8}
.pdot.ok{background:#639922}.pdot.bad{background:#e24b4a}

.stars{display:flex;gap:4px}
.star{font-size:24px;cursor:pointer;color:#d8d8de;user-select:none}
.star.on{color:#ef9f27}

.speak-area{background:#f7f8fa;border:1px solid var(--line);border-radius:10px;padding:14px;margin-top:10px}
.heard{background:var(--teal-weak);border-radius:8px;padding:8px 10px;margin-top:8px;color:var(--teal);font-size:14px;min-height:22px}
.score-big{font-size:32px;font-weight:700}
.score-bar{height:8px;border-radius:99px;background:#ededef;overflow:hidden;margin:6px 0}
.score-bar i{display:block;height:100%;border-radius:99px}

.hint{font-size:12px;color:var(--sub)}
.mic-btn{background:var(--teal);color:#fff;border:none;border-radius:8px;padding:9px 18px;font-size:13px;cursor:pointer}
.mic-btn.listening{background:#a32d2d;animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.6}}
.mic-btn:disabled{opacity:.45;cursor:not-allowed}

/* 背诵语音：实时跟背 & 录音 */
.ck-ref{background:#fdfbf6;border:1px dashed var(--line);border-radius:10px;padding:10px 12px;margin-top:8px;font-size:16px;line-height:2.1;max-height:180px;overflow:auto}
.ck-ref .tok{color:#b9b2a4;border-radius:4px;padding:1px 2px;transition:background .15s,color .15s}
.ck-ref .tok.hit{color:#2e7d32;background:rgba(76,175,80,.16);font-weight:600}
.ck-ref .tok.miss{color:#c62828;background:rgba(226,75,74,.13)}
.ck-ref .tok.cur{background:rgba(239,159,39,.3);box-shadow:0 0 0 2px rgba(239,159,39,.45);color:#7a4b05;font-weight:600}
.ck-livebar{display:flex;gap:10px;align-items:center;margin-top:10px;flex-wrap:wrap}
.rec-time{font-variant-numeric:tabular-nums;color:var(--sub);font-size:12px}
.ck-rec{margin-top:10px}
.ck-rec audio{width:100%;margin-top:4px}
.ck-rec .btn-row{margin-top:6px}

.subtabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.subtab{border:1px solid var(--line);background:#fff;color:var(--sub);border-radius:999px;padding:6px 16px;font-size:13px;cursor:pointer}
.subtab.on{background:var(--brand);border-color:var(--brand);color:#fff}

.chart-box svg{width:100%;height:auto;display:block}
.chart-legend{display:flex;gap:14px;flex-wrap:wrap;font-size:12px;color:var(--sub);margin-top:6px}
.chart-legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:5px;vertical-align:-1px}

.quick-actions{display:flex;gap:8px;flex-wrap:wrap}
.qa{border:1px solid var(--line);background:#fff;border-radius:10px;padding:10px 14px;font-size:13px;cursor:pointer;color:var(--ink)}
.qa:hover{border-color:var(--brand);color:var(--brand)}

.settings-row{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:12px 0;border-bottom:1px solid var(--line);flex-wrap:wrap}
.settings-row:last-child{border-bottom:none}
.lan-url{font-family:Consolas,monospace;background:var(--brand-weak);color:var(--brand);padding:4px 10px;border-radius:6px;font-size:13px}

/* ============ 孩子端：大字大按钮 ============ */
.kid-enter{background:var(--brand);color:#fff;border:none;border-radius:999px;padding:6px 16px;font-size:14px;font-weight:600;cursor:pointer}
.kid-enter:hover{opacity:.9}
body.kidmode header.top{display:none}
body.kidmode main{max-width:960px;padding:14px 14px 90px}
.kid-top{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:4px 2px 16px;flex-wrap:wrap}
.kid-exit{border:2px solid var(--brand);background:#fff;color:var(--brand);border-radius:999px;padding:9px 20px;font-size:16px;font-weight:700;cursor:pointer}
.kid-switch{display:flex;gap:10px;flex-wrap:wrap}
.kid-pill{border:none;border-radius:999px;padding:12px 26px;font-size:19px;font-weight:800;background:#fff;border:2px solid var(--line);color:var(--sub);cursor:pointer}
.kid-pill.on{background:var(--brand);border-color:var(--brand);color:#fff}
.kid-hero{background:linear-gradient(135deg,#534ab7,#7a5cd0);color:#fff;border-radius:22px;padding:24px 26px;margin-bottom:6px}
.kid-hi{font-size:30px;font-weight:800}
.kid-sub{font-size:16px;opacity:.94;margin-top:6px}
.kid-sec-title{font-size:19px;font-weight:800;margin:22px 4px 12px}
.kid-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.kid-card{background:#fff;border:2px solid var(--line);border-radius:20px;padding:20px;text-align:left;cursor:pointer;display:flex;flex-direction:column;gap:7px;transition:transform .1s,box-shadow .1s}
.kid-card:active{transform:scale(.96)}
.kid-card:hover{box-shadow:0 4px 14px rgba(83,74,183,.12)}
.kid-card.done{background:#f2f9ec;border-color:#9cc46f}
.kid-ico{font-size:38px;line-height:1.1}
.kid-name{font-size:23px;font-weight:800}
.kid-desc{font-size:15px;color:var(--sub);line-height:1.5}
.kid-state{margin-top:8px;font-size:16px;font-weight:800;color:var(--brand)}
.kid-card.done .kid-state{color:var(--green)}
.kid-big{padding:14px 26px;font-size:17px;border-radius:12px}
body.kidmode .modal{padding:24px}
body.kidmode .modal h3{font-size:19px;margin-bottom:16px}
body.kidmode .practice{padding:24px}
body.kidmode .q-txt{font-size:32px;line-height:1.7}
body.kidmode .q-no{font-size:14px;margin-bottom:10px}
body.kidmode input.ansin{font-size:26px;padding:14px;border-radius:12px}
body.kidmode .btn{padding:13px 24px;font-size:16px;border-radius:10px}
body.kidmode .mic-btn{padding:14px 26px;font-size:16px;border-radius:12px}
body.kidmode .subtab{padding:10px 22px;font-size:16px;border-radius:999px}
body.kidmode .star{font-size:36px}
body.kidmode .hint{font-size:14px}
body.kidmode .heard{font-size:16px;padding:10px 12px}
body.kidmode .verdict{font-size:18px;margin:10px 0}
body.kidmode .ans-txt{font-size:19px}
body.kidmode .ck-ref{font-size:21px;line-height:2.2}
body.kidmode .list-item{padding:14px 16px}
body.kidmode .list-item .head{font-size:16px}
body.kidmode .progress-dots .pdot{width:14px;height:14px}
.kid-progress{margin-top:10px;font-size:13px;color:var(--sub)}
.dp-tag{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:999px;padding:8px 12px;font-size:14px;cursor:pointer;background:#fff;color:var(--sub);user-select:none}
.dp-tag.on{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.dp-tag input{display:none}

/* ============ 孩子端：专属端口 & 单元考核 ============ */
.kid-enter2{background:var(--coral);margin-left:8px}
.kid-lockname{font-size:22px;font-weight:800;color:var(--brand);display:flex;align-items:center;gap:6px}
/* 单元进度条 */
.kid-units{display:flex;flex-direction:column;gap:10px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px 18px;margin-bottom:14px}
.ku-row{display:flex;align-items:center;gap:12px}
.ku-lbl{flex:0 0 44px;font-size:15px;font-weight:700}
.ku-bar{flex:1;height:12px;border-radius:99px;background:#ededef;overflow:hidden}
.ku-bar i{display:block;height:100%;border-radius:99px;transition:width .3s}
.ku-num{flex:0 0 auto;font-size:13px;color:var(--sub);font-variant-numeric:tabular-nums;white-space:nowrap}
/* 单元考核大按钮 */
.kid-exam{display:flex;flex-direction:column;align-items:flex-start;gap:4px;width:100%;background:linear-gradient(135deg,#185fa5,#2a9d8f);color:#fff;border:none;border-radius:20px;padding:22px 26px;font-size:26px;font-weight:800;cursor:pointer;text-align:left;margin-bottom:6px;box-shadow:0 6px 18px rgba(24,95,165,.18)}
.kid-exam:active{transform:scale(.98)}
.kid-exam .ke-sub{font-size:14px;font-weight:500;opacity:.92}
/* 孩子端错题/成绩列表 */
.kw-list{display:flex;flex-direction:column;gap:10px}
.kw-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.kw-item .head{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-bottom:6px}
.kw-item .body{font-size:15px;color:var(--ink);word-break:break-word;line-height:1.6}
.kw-item .ops{margin-top:8px}
/* 孩子端底部导航 */
.kid-nav{position:fixed;left:0;right:0;bottom:0;z-index:40;background:#fff;border-top:1px solid var(--line);display:flex;padding:6px 4px calc(6px + env(safe-area-inset-bottom));box-shadow:0 -4px 16px rgba(0,0,0,.06)}
.kn-item{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;border:none;background:none;padding:8px 0;cursor:pointer;color:var(--sub);border-radius:10px}
.kn-item .kn-ico{font-size:22px;line-height:1.2}
.kn-item .kn-lbl{font-size:12px;font-weight:600}
.kn-item.on{background:var(--brand-weak);color:var(--brand)}
@media(min-width:721px){.kid-nav{max-width:560px;left:50%;transform:translateX(-50%);border-radius:18px 18px 0 0}}
@media print{.top,.btn,.no-print{display:none!important}main{max-width:none;padding:0}.card{border:none}}