/* ===== 设计基础：颜色、字号、间距（孩子用：字大一点、点击区域大一点、主次分明） =====
   品牌 beejoy：蜂蜜色。--brand 是实心填充（按钮、进度、选中），文字用 --brand-ink（蜂蜜色字在浅底上看不清）。 */
@font-face{font-family:"Fredoka";font-weight:600;font-display:swap;src:url(/static/fonts/fredoka-600.woff2) format("woff2");unicode-range:U+0020-007E,U+00B7,U+00D7,U+2190,U+2192}
:root{--bg:#faf6ec;--card:#fff;--ink:#2b2118;--muted:#6e6455;--faint:#978c78;--line:#ece3cf;--line-2:#f4eee1;
--brand:#f6b400;--brand-d:#e5a300;--brand-2:#fff4cf;--brand-3:#ffe08a;--brand-ink:#8a5300;--brand-ink-d:#6e4200;--on-brand:#2b2118;--on-warn:#fff;
--warn:#c2410c;--warn-2:#fff1e6;--ok:#15803d;--ok-2:#e7f6ec;--learn:#b45309;--learn-2:#fef6e4;--unk:#9aa0a6;
--sun:#f5b301;--sun-2:#fff6d6;--sky:#2f6fdc;--sky-2:#e9f0fd;--coral:#e0573a;--coral-2:#fdeee9;--violet:#6d4fd8;--violet-2:#f0ecfd;--wing:#d6eeff;
--radius:20px;--r-sm:12px;--shadow:0 1px 2px rgba(43,33,24,.04),0 6px 20px rgba(43,33,24,.06);--shadow-lg:0 12px 32px rgba(43,33,24,.16);
--ring:0 0 0 4px rgba(246,180,0,.3);--heat-0:#efe8d8;--heat-1:#ffe9a8;--heat-2:#ffd25c;--heat-3:#f6b400;--heat-4:#c98a00;
--f-round:"Fredoka",ui-rounded,"SF Pro Rounded",-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
@media (prefers-color-scheme:dark){:root{--bg:#16130f;--card:#211d17;--ink:#f3ecdd;--muted:#b4a991;--faint:#8c8371;--line:#352e24;--line-2:#2a251d;
--brand:#ffc21a;--brand-d:#ffd45c;--brand-2:#3a2f12;--brand-3:#5a4614;--brand-ink:#ffcb3d;--brand-ink-d:#ffdd80;--on-brand:#2b2118;--on-warn:#2b2118;
--warn:#fb923c;--warn-2:#3a2417;--ok:#4ade80;--ok-2:#173022;--learn:#fbbf24;--learn-2:#33290f;
--sun:#fbbf24;--sun-2:#3a3010;--sky:#7aa7ff;--sky-2:#1c2740;--coral:#ff8a70;--coral-2:#3a221c;--violet:#a893ff;--violet-2:#2a2342;--wing:#bfe3ff;
--shadow:0 1px 2px rgba(0,0,0,.3);--shadow-lg:0 12px 32px rgba(0,0,0,.5);--ring:0 0 0 4px rgba(255,194,26,.3);
--heat-0:#2a251d;--heat-1:#4a3a12;--heat-2:#7a5c10;--heat-3:#c08d0e;--heat-4:#ffc21a}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--brand-ink);text-decoration:none}a:hover{color:var(--brand-ink-d)}
:focus-visible{outline:none;box-shadow:var(--ring);border-radius:8px}
::selection{background:var(--brand-3)}
.wrap{max-width:880px;margin:0 auto;padding:8px 16px 120px}
/* 顶栏 */
header.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px max(16px,calc(50% - 424px));
background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid transparent}
header.top .logo{display:inline-flex;align-items:center;gap:7px;font-weight:800;font-size:18px;color:var(--ink);letter-spacing:.2px;border-radius:12px;padding:2px 4px 2px 0}
header.top .logo:hover{color:var(--ink)}header.top .logo:hover .mascot{transform:rotate(-8deg) scale(1.06)}header.top .logo .mascot{transition:transform .25s}
header.top .logo .wordmark{margin-top:2px}
header.top .who{font-size:14px;color:var(--muted);display:flex;align-items:center;gap:4px;flex-wrap:wrap;justify-content:flex-end}
header.top .who a{padding:4px 8px;border-radius:99px}header.top .who a:hover{background:var(--brand-2)}
/* 底部导航：浮在底部的胶囊，手机和电脑都一样 */
nav.tabs{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(10px + env(safe-area-inset-bottom));width:min(560px,calc(100% - 20px));
background:color-mix(in srgb,var(--card) 92%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:22px;
box-shadow:var(--shadow-lg);display:flex;justify-content:space-between;padding:6px;z-index:30}
nav.tabs a{flex:1;display:flex;flex-direction:column;align-items:center;gap:1px;font-size:12px;color:var(--muted);padding:6px 4px;border-radius:16px;transition:background .2s,color .2s}
nav.tabs a .i{font-size:22px;line-height:1.15;transition:transform .2s}nav.tabs a:hover{background:var(--line-2)}
nav.tabs a.on{color:var(--brand-ink);font-weight:700;background:var(--brand-2)}nav.tabs a.on .i{transform:translateY(-1px) scale(1.08)}
/* 中间凸起的「乐园」：学习之后的奖励，一眼能找到 */
nav.tabs a.play{position:relative;overflow:visible;color:#6d4fd8;font-weight:700}
nav.tabs a.play .i{width:52px;height:52px;margin:-26px 0 1px;display:grid;place-items:center;font-size:27px;border-radius:50%;
background:linear-gradient(145deg,#ffd76a,#ff8fb1 55%,#9b7bff);box-shadow:0 6px 16px rgba(109,79,216,.35),0 0 0 4px var(--card)}
nav.tabs a.play:hover{background:transparent}nav.tabs a.play:hover .i{transform:translateY(-2px) rotate(-6deg)}
nav.tabs a.play.on{background:transparent}nav.tabs a.play.on .i{transform:translateY(-3px) scale(1.06)}
/* 今天页：复习、单词本、乐园的快捷入口 */
.quick{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:0 0 14px}
.quick a{display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:18px;background:var(--card);border:1px solid var(--line);color:var(--ink);box-shadow:var(--shadow);min-width:0}
.quick a .qi{font-size:26px;line-height:1}.quick a b{display:block;font-size:15px}.quick a small{display:block;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.quick a.qplay{background:linear-gradient(135deg,#fff3c4,#ffe0ec 60%,#e9e0ff);border-color:#e6d6ff}
.quick a.qplay.lock{filter:saturate(.55)}.quick a.qplay .pbar{display:block;height:5px;border-radius:9px;background:rgba(0,0,0,.08);margin-top:4px;overflow:hidden}
.quick a.qplay .pbar i{display:block;height:100%;background:#9b7bff;border-radius:9px}
@media (max-width:560px){.quick{grid-template-columns:1fr 1fr}.quick a.qplay{grid-column:1/-1}}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .quick a.qplay{background:linear-gradient(135deg,#3a3320,#3a2430 60%,#2c2547);border-color:#4a3d6b}}
:root[data-theme=dark] .quick a.qplay{background:linear-gradient(135deg,#3a3320,#3a2430 60%,#2c2547);border-color:#4a3d6b}
/* 文字 */
h1{font-size:26px;line-height:1.3;margin:14px 0 6px;font-weight:800;letter-spacing:.3px}h2{font-size:20px;margin:28px 0 10px;font-weight:750}h3{font-size:17px;margin:16px 0 8px;font-weight:700}
.muted{color:var(--muted)}.small{font-size:14px}.tiny{font-size:12px}.faint{color:var(--faint)}
.lead{color:var(--muted);margin:0 0 14px;font-size:15px}
.num-big{font-size:30px;font-weight:800;line-height:1.1;font-variant-numeric:tabular-nums;font-family:var(--f-round)}
/* 卡片 */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin:14px 0;box-shadow:var(--shadow)}
.card>h3:first-child,.card>.card-h:first-child{margin-top:0}
.card-h{display:flex;align-items:center;gap:10px;margin:0 0 12px}.card-h h3{margin:0;flex:1}
.card-h .ico{width:36px;height:36px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:19px;background:var(--brand-2);flex:none}
a.card,.card.link{display:block;color:inherit;transition:transform .15s,box-shadow .15s,border-color .15s}
a.card:hover,.card.link:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--brand-3)}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.grow{flex:1;min-width:0}
/* 放名字、说明的那一块：窄屏放不下时自己占一行，别被旁边的按钮挤成竖排 */
.grow-w{flex:1 1 14em}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.cols{display:grid;grid-template-columns:1fr;gap:0 14px}@media (min-width:760px){.cols{grid-template-columns:1fr 1fr}.cols>.card{margin:7px 0}}
/* 按钮：主按钮实心，次按钮描边，再次按钮浅底；按下有反馈 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1.5px solid var(--brand);background:var(--brand);color:var(--on-brand);border-radius:var(--r-sm);
padding:10px 18px;font-size:16px;font-weight:600;cursor:pointer;min-height:46px;font-family:inherit;line-height:1.2;text-align:center;
transition:background .15s,border-color .15s,transform .08s,box-shadow .15s;-webkit-tap-highlight-color:transparent;user-select:none}
.btn:hover{background:var(--brand-d);border-color:var(--brand-d);color:var(--on-brand)}.btn:active{transform:translateY(1px) scale(.98)}
.btn.ghost{background:transparent;color:var(--brand-ink)}.btn.ghost:hover{background:var(--brand-2);color:var(--brand-ink)}
.btn.soft{background:var(--brand-2);border-color:transparent;color:var(--brand-ink)}.btn.soft:hover{background:var(--brand-3);color:var(--brand-ink)}
.btn.sm{padding:6px 12px;min-height:36px;font-size:14px;border-radius:10px}.btn.lg{min-height:54px;font-size:17px;padding:12px 24px;border-radius:14px}
.btn.block{display:flex;width:100%}
.btn.warn{background:var(--warn);border-color:var(--warn);color:var(--on-warn)}.btn:disabled,.btn[aria-busy=true]{opacity:.55;cursor:default;transform:none}
.btn[aria-busy=true]::before{content:"";width:16px;height:16px;border-radius:50%;border:2px solid currentColor;border-right-color:transparent;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.linkbtn{background:none;border:0;padding:6px 8px;border-radius:8px;color:var(--muted);font:inherit;font-size:14px;cursor:pointer}.linkbtn:hover{background:var(--line-2);color:var(--ink)}
/* 输入框：所有文本类输入统一外观，聚焦有光圈 */
input:not([type=checkbox]):not([type=radio]):not([type=range]):not([type=file]):not([type=hidden]):not([type=submit]):not([type=button]):not([type=color]),select,textarea{
width:100%;padding:11px 14px;border:1.5px solid var(--line);border-radius:var(--r-sm);background:var(--card);color:var(--ink);font:inherit;font-size:16px;min-height:48px;
transition:border-color .15s,box-shadow .15s;-webkit-appearance:none;appearance:none}
input::placeholder,textarea::placeholder{color:var(--faint)}
input:not([type=checkbox]):not([type=radio]):hover,select:hover,textarea:hover{border-color:var(--brand-3)}
input:not([type=checkbox]):not([type=radio]):focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:var(--ring)}
select{padding-right:40px;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%23646a73' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center}
input[type=checkbox],input[type=radio]{accent-color:var(--brand);width:18px;height:18px}
textarea{min-height:120px;resize:vertical;line-height:1.6}label{display:block;margin:12px 0 6px;font-weight:650;font-size:14px}
.field-tip{font-size:13px;color:var(--muted);margin:6px 2px 0}
/* 输入框 + 按钮连在一起（贴链接、提问） */
.ig{display:flex;align-items:stretch;gap:6px;padding:5px;border:1.5px solid var(--line);border-radius:16px;background:var(--card);transition:border-color .15s,box-shadow .15s}
.ig:focus-within{border-color:var(--brand);box-shadow:var(--ring)}
.ig input:not([type=checkbox]){border:0!important;box-shadow:none!important;min-height:44px;padding:8px 10px;background:transparent;flex:1;min-width:0}
.ig .btn{min-height:44px;border-radius:12px;flex:none}
.ig .ig-ico{display:flex;align-items:center;padding-left:8px;font-size:18px;color:var(--faint)}
/* 分段选择（代替下拉框，一眼看到所有选项） */
.seg{display:inline-flex;gap:4px;padding:4px;border-radius:14px;background:var(--line-2);border:1px solid var(--line);max-width:100%;flex-wrap:wrap}
.seg label{margin:0;font-weight:600;font-size:15px;cursor:pointer;position:relative}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:flex;align-items:center;gap:6px;padding:8px 14px;border-radius:10px;color:var(--muted);transition:background .15s,color .15s,box-shadow .15s;min-height:40px}
.seg label:hover span{color:var(--ink)}
.seg input:checked+span{background:var(--card);color:var(--brand-ink);box-shadow:0 1px 3px rgba(0,0,0,.08),0 0 0 1px var(--brand-3)}
.seg input:focus-visible+span{box-shadow:var(--ring)}
.seg.full{display:flex}.seg.full label{flex:1}.seg.full span{justify-content:center}
/* 小标签按钮（话题建议等） */
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 0}
.chip{display:inline-flex;align-items:center;gap:4px;border:1.5px solid var(--line);background:var(--card);color:var(--ink);border-radius:99px;padding:6px 12px;font:inherit;font-size:14px;cursor:pointer;
transition:border-color .15s,background .15s,transform .08s;line-height:1.3}
.chip:hover{border-color:var(--brand-3);background:var(--brand-2)}.chip:active{transform:scale(.96)}.chip.on{border-color:var(--brand);background:var(--brand-2);color:var(--brand-ink);font-weight:600}
.chip .sub{color:var(--muted);font-size:12px}
/* 标签页（同一张卡片里切换几种方式） */
.tabset{display:flex;gap:4px;padding:4px;background:var(--line-2);border-radius:16px;margin:0 0 14px;overflow-x:auto;scrollbar-width:none}
.tabset button{flex:1;white-space:nowrap;border:0;background:transparent;border-radius:12px;padding:10px 12px;font:inherit;font-size:15px;font-weight:650;color:var(--muted);cursor:pointer;min-height:44px;transition:background .15s,color .15s}
.tabset button:hover{color:var(--ink)}.tabset button[aria-selected=true]{background:var(--card);color:var(--brand-ink);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.tabpane[hidden]{display:none}
.pill{display:inline-block;padding:2px 9px;border-radius:99px;font-size:12px;font-weight:600;background:var(--brand-2);color:var(--brand-ink);white-space:nowrap;line-height:1.7;border:0;font-family:inherit}
button.pill{cursor:pointer}
.st-unknown{background:#eef0f2;color:#5f6670}.st-weak{background:var(--warn-2);color:var(--warn)}.st-learning{background:var(--learn-2);color:var(--learn)}.st-mastered{background:var(--ok-2);color:var(--ok)}
@media (prefers-color-scheme:dark){.st-unknown{background:#2a2d33;color:#aab}}
.task{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-bottom:1px solid var(--line)}.task:last-child{border-bottom:0}
.task .chk{width:28px;height:28px;border-radius:50%;border:2px solid var(--line);flex:none;display:flex;align-items:center;justify-content:center;cursor:pointer;background:transparent;color:#fff;font-size:16px}
.task.done .chk{background:var(--ok);border-color:var(--ok)}.task.done .t{text-decoration:line-through;color:var(--muted)}
.kind{font-size:12px;padding:1px 6px;border-radius:6px;margin-right:6px}
.k-review{background:#e8eefc;color:#3557b7}.k-weak{background:var(--warn-2);color:var(--warn)}.k-backfill{background:#f3e8fd;color:#7e3bb5}.k-preview{background:var(--ok-2);color:var(--ok)}.k-reading{background:var(--learn-2);color:var(--learn)}.k-diagnose{background:#e0f2fe;color:#0369a1}
.bar{height:10px;border-radius:99px;background:var(--line-2);overflow:hidden;display:flex}.bar span{display:block;height:100%}
/* 学习日历：按星期对齐、带日期，颜色越深学得越久 */
.calendar{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px}
.calendar .wh{font-size:12px;color:var(--faint);text-align:center;padding-bottom:2px}
.calendar .d{position:relative;aspect-ratio:1;max-height:58px;border-radius:12px;background:var(--heat-0);display:flex;flex-direction:column;align-items:center;justify-content:center;
color:var(--muted);font-size:14px;font-weight:600;font-variant-numeric:tabular-nums;transition:transform .12s}
a.d:hover{transform:scale(1.06);color:var(--ink)}
.calendar .d.pad{background:transparent}.calendar .d.future{background:transparent;border:1.5px dashed var(--line);color:var(--faint)}
.calendar .d.l1{background:var(--heat-1);color:var(--ink)}.calendar .d.l2{background:var(--heat-2);color:#fff}.calendar .d.l3{background:var(--heat-3);color:#fff}.calendar .d.l4{background:var(--heat-4);color:#fff}
.calendar .d.today{box-shadow:0 0 0 2.5px var(--card),0 0 0 4.5px var(--sun)}
.calendar .d .m{font-size:10px;font-weight:500;opacity:.85;line-height:1}
.calendar .d .ck{position:absolute;right:3px;top:1px;font-size:10px}
.calendar .d .fz{position:absolute;left:3px;top:1px;font-size:10px}
.legend{display:flex;align-items:center;gap:4px;font-size:12px;color:var(--faint);margin-top:10px;flex-wrap:wrap}
.legend i{width:14px;height:14px;border-radius:4px;display:inline-block}
/* 紧凑热力图（记录页：一列一周） */
.heat{display:grid;grid-auto-flow:column;justify-content:start;grid-template-rows:auto repeat(7,1fr);gap:4px;overflow-x:auto;padding-bottom:4px}
.heat .wl{font-size:11px;color:var(--faint);display:flex;align-items:center;padding-right:4px}
.heat .ml{font-size:11px;color:var(--faint);white-space:nowrap;height:16px;overflow:visible}
.heat a,.heat span.c{width:100%;min-width:16px;aspect-ratio:1;border-radius:5px;background:var(--heat-0);display:block}
.heat .l1{background:var(--heat-1)}.heat .l2{background:var(--heat-2)}.heat .l3{background:var(--heat-3)}.heat .l4{background:var(--heat-4)}.heat .future{background:transparent;border:1px dashed var(--line)}
.heat .today{box-shadow:0 0 0 2px var(--sun)}
/* 这一周：每天一根柱子，虚线是每天目标 */
.week{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:8px;align-items:end;position:relative}
.week .col{display:flex;flex-direction:column;align-items:center;gap:6px;color:inherit;min-width:0}
.week .v{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;height:16px;line-height:16px}
.week .track{position:relative;width:100%;max-width:44px;height:110px;border-radius:12px;background:var(--line-2);display:flex;align-items:flex-end;overflow:hidden}
.week .fill{width:100%;border-radius:12px;background:linear-gradient(180deg,var(--heat-2),var(--brand));min-height:0;transition:height .8s cubic-bezier(.2,.8,.2,1)}
.week .fill.hit{background:linear-gradient(180deg,#ffd45c,var(--sun))}
.week .goal{position:absolute;left:0;right:0;border-top:2px dashed color-mix(in srgb,var(--ink) 25%,transparent)}
.week .wd{font-size:13px;color:var(--muted);font-weight:600;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center}
.week .col.today .wd{background:var(--ink);color:var(--card)}
.week .col.future .track{background:transparent;border:1.5px dashed var(--line)}
a.col:hover .track{outline:2px solid var(--brand-3)}
.statline{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 14px}
.statline>div{flex:1;min-width:90px;background:var(--line-2);border-radius:14px;padding:10px 12px}
.statline b{display:block;font-size:22px;line-height:1.2;font-variant-numeric:tabular-nums}.statline>div>span{font-size:12px;color:var(--muted)}
.kp{display:flex;gap:10px;align-items:center;padding:12px 14px;border:1px solid var(--line);border-radius:14px;margin:8px 0;background:var(--card);color:var(--ink);transition:border-color .15s,transform .12s}
a.kp:hover{border-color:var(--brand-3);color:var(--ink);transform:translateX(2px)}
.kp .n{flex:1;min-width:0}.kp.hot .n::after{content:"高频";font-size:11px;margin-left:6px;color:var(--warn)}
.stage-h{display:flex;align-items:center;gap:8px}.stage-h.cur{color:var(--brand-ink)}
.steps{counter-reset:s;padding:0;list-style:none}.steps li{counter-increment:s;position:relative;padding-left:40px;margin:12px 0}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:28px;height:28px;border-radius:50%;background:var(--brand);color:var(--on-brand);display:flex;align-items:center;justify-content:center;font-weight:700}
.opt{display:block;width:100%;text-align:left;padding:14px 16px;border:1.5px solid var(--line);border-radius:14px;margin:8px 0;background:var(--card);color:var(--ink);font:inherit;cursor:pointer;min-height:52px;transition:border-color .15s,background .15s,transform .08s}
.opt:hover{border-color:var(--brand-3);background:var(--brand-2)}.opt:active{transform:scale(.99)}
.opt.sel{border-color:var(--brand);background:var(--brand-2)}.opt.right{border-color:var(--ok);background:var(--ok-2)}.opt.wrong{border-color:var(--warn);background:var(--warn-2)}
.fb{padding:14px;border-radius:14px;margin-top:12px}.fb.ok{background:var(--ok-2)}.fb.no{background:var(--warn-2)}
.reader{font-size:19px;line-height:1.9}.reader .w{cursor:pointer;border-radius:4px}.reader .w:hover{background:var(--brand-2)}.reader .w.seen{border-bottom:2px dotted var(--learn)}
.reader p{margin:0 0 1em}
.sheet{position:fixed;left:0;right:0;bottom:0;max-height:75vh;overflow:auto;background:var(--card);border-top:1px solid var(--line);border-radius:22px 22px 0 0;box-shadow:0 -8px 30px rgba(0,0,0,.15);padding:18px 18px calc(24px + env(safe-area-inset-bottom));z-index:60;display:none;max-width:720px;margin:0 auto}
.sheet.on{display:block;animation:up .25s ease-out}.sheet .close{float:right}
@keyframes up{from{transform:translateY(30px);opacity:0}}
.flash{max-width:560px;margin:0 auto;text-align:center}.flash .face{min-height:200px;display:flex;flex-direction:column;justify-content:center;font-size:24px;white-space:pre-wrap}
.flash .back{font-size:17px;color:var(--muted);text-align:left}
/* 表格：外面套一层 .tw，窄屏放不下时整张表横向滑动，而不是把列挤成一两个字宽。
   表头不折行；.nw 的格子（日期、数字、邮箱、状态）不折行；.tx 的格子是长文字，给个最小宽度再折行。 */
.tw{overflow-x:auto;-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain;margin:8px 0;--tw-bg:var(--bg);--tw-sh:rgba(43,33,24,.16);
background:linear-gradient(to right,var(--tw-bg) 40%,transparent) left/32px 100% no-repeat local,linear-gradient(to left,var(--tw-bg) 40%,transparent) right/32px 100% no-repeat local,
radial-gradient(farthest-side at 0 50%,var(--tw-sh),transparent) left/10px 100% no-repeat scroll,radial-gradient(farthest-side at 100% 50%,var(--tw-sh),transparent) right/10px 100% no-repeat scroll}
.card .tw{--tw-bg:var(--card)}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .tw{--tw-sh:rgba(0,0,0,.6)}}
table{width:100%;border-collapse:collapse;font-size:14px}td,th{padding:10px 8px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{font-size:13px;color:var(--muted);font-weight:600;white-space:nowrap}
tr:last-child>td{border-bottom:0}.nw{white-space:nowrap}td.tx{min-width:9em}table.nums td,td.nw{font-variant-numeric:tabular-nums}
table.kv td:first-child{white-space:nowrap;color:var(--muted);width:1%}
.tw>table td:first-child,.tw>table th:first-child{padding-left:0}.tw>table td:last-child,.tw>table th:last-child{padding-right:0}
.hint{background:var(--learn-2);border-radius:12px;padding:12px 14px;font-size:14px}
.err{background:var(--warn-2);color:var(--warn);padding:12px 14px;border-radius:12px;margin:8px 0;font-size:15px}
.loading{color:var(--muted);font-size:14px}.loading::after{content:"…";animation:dots 1s infinite}@keyframes dots{50%{opacity:.2}}
.banner{background:var(--learn-2);padding:8px 16px;text-align:center;font-size:14px}
/* 空状态 */
.empty{text-align:center;padding:28px 16px;color:var(--muted)}.empty .e{font-size:44px;line-height:1.2;margin-bottom:6px}.empty b{display:block;color:var(--ink);font-size:17px;margin-bottom:4px}
/* 页面标题行 */
.ph{display:flex;align-items:flex-end;gap:12px;flex-wrap:wrap;margin:14px 0 4px}.ph h1{margin:0;flex:1}
.back{display:inline-flex;align-items:center;gap:4px;font-size:14px;color:var(--muted);margin-top:10px;padding:4px 8px 4px 2px;border-radius:8px}.back:hover{color:var(--brand-ink)}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
/* 管理后台 */
.subnav{display:flex;gap:8px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin:6px 0 14px;padding:2px}.subnav a{flex:none;padding:8px 14px;border-radius:99px;background:var(--card);border:1.5px solid var(--line);color:var(--ink);text-decoration:none;font-size:14px;font-weight:600;white-space:nowrap;transition:border-color .15s,background .15s}.subnav a:hover{border-color:var(--brand-3)}.subnav a.on{background:var(--brand);border-color:var(--brand);color:var(--on-brand)}.subnav a b{font-weight:700;opacity:.75;margin-left:2px}
.badge{display:inline-block;min-width:18px;padding:0 5px;border-radius:9px;background:var(--warn);color:#fff;font-size:12px;text-align:center}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:10px;margin-bottom:14px}.stat{background:var(--card,#fff);border:1px solid var(--line);border-radius:12px;padding:12px;text-align:center}.stat b{display:block;font-size:26px}.stat span{font-size:13px;color:var(--muted,#888)}
/* 即时反馈动画 */
@keyframes pop{0%{transform:scale(.85);opacity:0}60%{transform:scale(1.04);opacity:1}100%{transform:scale(1)}}
.pop{animation:pop .35s ease-out}
.fb.dk{background:var(--learn-2)}
.toast{position:fixed;left:50%;top:18%;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:12px 20px;border-radius:99px;font-size:18px;z-index:100;animation:pop .3s ease-out;transition:opacity .4s,transform .4s;box-shadow:0 6px 24px rgba(0,0,0,.2)}
.toast.out{opacity:0;transform:translate(-50%,-20px)}
@keyframes spark{to{transform:translate(var(--dx),var(--dy)) scale(.4);opacity:0}}
.spark{position:fixed;pointer-events:none;font-size:20px;z-index:100;animation:spark .9s ease-out forwards}
@keyframes fall{0%{top:-10px}100%{top:105vh;transform:rotate(720deg)}}
.confetti{position:fixed;top:-10px;width:8px;height:14px;border-radius:2px;z-index:99;pointer-events:none;animation:fall 2.4s linear forwards}
@keyframes flame{0%,100%{transform:scale(1) rotate(-3deg)}50%{transform:scale(1.12) rotate(3deg)}}
.flame{display:inline-block;animation:flame 1.2s ease-in-out infinite}
/* 每日任务清单 */
.daybar{height:14px;border-radius:99px;background:var(--line);overflow:hidden;margin:8px 0}.daybar span{display:block;height:100%;background:linear-gradient(90deg,var(--ok),#e0a100);transition:width .8s ease}
.steplist{position:relative}
.step{position:relative;display:flex;gap:14px;align-items:center;padding:12px 10px;border-radius:14px;margin:2px -10px;transition:background .15s}
.step:not(.next):hover{background:var(--line-2)}
.step .num{position:relative;z-index:1;flex:0 0 36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;background:var(--card);border:2px solid var(--line);color:var(--muted);font-variant-numeric:tabular-nums}
.step .t{font-weight:650;color:var(--ink);font-size:16px}.step .t:hover{color:var(--brand-ink)}
.step .why{font-size:13.5px;color:var(--muted);margin-top:1px}.step .mins{font-size:12px;color:var(--faint);white-space:nowrap}
.step.done .num{background:var(--ok);border-color:var(--ok);color:#fff}.step.done .t{color:var(--muted);text-decoration:line-through;text-decoration-color:var(--faint);font-weight:500}.step.done .why{display:none}
.step.next{background:linear-gradient(135deg,var(--brand-2),color-mix(in srgb,var(--brand-2) 40%,var(--card)));border:1.5px solid var(--brand-3);padding:16px 14px;margin:6px -6px}
.step.next .num{background:var(--brand);border-color:var(--brand);color:var(--on-brand);box-shadow:0 0 0 5px color-mix(in srgb,var(--brand) 18%,transparent)}
.step.next .t{font-size:17.5px}
.stepacts{display:flex;gap:8px;align-items:center;flex:none;flex-wrap:wrap;justify-content:flex-end}
.step.justdone .num{animation:pop .6s ease-out}
.streakbox{display:flex;gap:14px;align-items:center}.streakbox .big{font-size:40px;line-height:1}
/* 今天页顶部：问候 + 进度环 + 继续按钮 */
.hero{position:relative;display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:center;background:radial-gradient(120% 140% at 100% 0,color-mix(in srgb,var(--sun-2) 85%,transparent),transparent 55%),var(--card)}
.ring{--p:0;width:92px;height:92px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--brand) calc(var(--p)*1%),var(--line-2) 0);transition:--p 1s}
.ring>div{width:72px;height:72px;border-radius:50%;background:var(--card);display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.1}
.ring b{font-size:23px;font-variant-numeric:tabular-nums;font-family:var(--f-round);font-weight:600}.ring span{font-size:11px;color:var(--muted)}
.ring.full{background:conic-gradient(var(--sun) 100%,var(--sun) 0)}
.hero .hi{font-size:14px;color:var(--muted)}.hero .big-line{font-size:20px;font-weight:800;margin:2px 0 6px;line-height:1.35}
.hero .meta{display:flex;gap:8px;flex-wrap:wrap;font-size:13px}
.hero .meta span{background:var(--line-2);border-radius:99px;padding:3px 10px;white-space:nowrap}
.hero .go{grid-column:1/-1}
@media (min-width:640px){.hero{grid-template-columns:auto 1fr auto}.hero .go{grid-column:auto}}
/* 今天页：小节、保底、目标、冲刺（app/streak.py、app/sprint.py） */
.secs{display:flex;align-items:center;gap:5px;margin:0 0 6px}.secs small{font-size:12px;color:var(--muted);margin-left:4px;white-space:nowrap}
.sec{flex:1;max-width:64px;height:10px;border-radius:99px;background:var(--line-2);overflow:hidden;box-shadow:inset 0 0 0 1px var(--line)}
.sec i{display:block;height:100%;background:var(--sun);border-radius:99px;transition:width .5s}.sec.ok i{background:var(--brand)}
.sec.cur{box-shadow:inset 0 0 0 1px var(--line),0 0 0 2px var(--sun-2)}
.base-line{font-size:13.5px;color:var(--muted);margin:0 0 6px}.base-line.ok{color:var(--ok);font-weight:650}
.note-bar{border-radius:var(--r-sm);padding:10px 14px;margin:0 0 12px;font-size:14.5px;border:1px solid var(--line)}
.note-bar.ice{background:var(--sky-2);border-color:color-mix(in srgb,var(--sky) 30%,transparent)}
.note-bar.rest{background:var(--ok-2);border-color:color-mix(in srgb,var(--ok) 25%,transparent)}
.goal-card{position:relative;display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px 16px;margin:0 0 14px;box-shadow:var(--shadow)}
.goal-card .gi{font-size:26px}.goal-card .grow{flex:1;min-width:180px}
.gbar{height:8px;border-radius:99px;background:var(--line-2);overflow:hidden;margin-top:6px}.gbar i{display:block;height:100%;background:linear-gradient(90deg,var(--sun),var(--coral));border-radius:99px;transition:width .6s}
.goal-card.hit .gbar i{background:var(--ok)}.goal-card .gt{display:flex;align-items:baseline;gap:8px}.gpct{margin-left:auto;font-weight:800;font-size:15px;white-space:nowrap}
.goal-pick[hidden]{display:none}.goal-pick{flex-basis:100%;display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.goal-pick button{border:1.5px solid var(--line);background:var(--bg);color:var(--ink);border-radius:14px;padding:8px 6px;font:inherit;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:2px}
.goal-pick button small{font-size:11.5px;color:var(--muted);text-align:center;line-height:1.3}.goal-pick button.on{border-color:var(--brand);background:var(--brand-2)}
@media (max-width:560px){.goal-pick{grid-template-columns:1fr 1fr}}
.sec-h{display:flex;justify-content:space-between;align-items:baseline;font-size:13px;color:var(--muted);margin:12px 4px 4px;padding-top:8px;border-top:1px dashed var(--line)}
.sec-h:first-child{border-top:0;margin-top:0;padding-top:0}.sec-h b{color:var(--ink);font-size:14px}.sec-h.ok b{color:var(--ok)}
.sprint-card{display:flex;align-items:center;gap:14px;color:var(--ink);border:2px solid color-mix(in srgb,var(--sun) 55%,transparent);background:linear-gradient(135deg,var(--sun-2),var(--card) 70%)}
.sprint-card:hover{color:var(--ink)}.sprint-card .si{font-size:34px}.sprint-card.lock{border-color:var(--line);background:var(--card);opacity:.85}
.sec-pop{position:fixed;inset:0;z-index:60;display:grid;place-items:center;background:rgba(20,22,26,.45);padding:16px}
.sec-card{background:var(--card);border-radius:24px;padding:22px;max-width:360px;width:100%;text-align:center;box-shadow:var(--shadow-lg);animation:secin .35s cubic-bezier(.2,.9,.3,1.3)}
.sec-card .big{font-size:52px;line-height:1.1}.sec-card>b{font-size:22px;display:block;margin:4px 0}.sec-card .btn{margin-top:8px}
.rest-t{font-size:48px;font-weight:900;font-variant-numeric:tabular-nums;margin:6px 0}.rest-tip{font-size:17px;min-height:1.6em}
@keyframes secin{from{transform:translateY(16px) scale(.94);opacity:0}}
.badges span{font-size:22px;margin-right:4px}
.moods button{font-size:28px;background:var(--line-2);border:2px solid transparent;border-radius:14px;width:52px;height:52px;cursor:pointer;transition:transform .1s,border-color .15s,background .15s}.moods button:hover{transform:scale(1.08)}.moods button.sel{border-color:var(--brand);background:var(--brand-2);transform:scale(1.08)}
.mini-bars{display:flex;gap:4px;align-items:flex-end;height:60px}.mini-bars div{flex:1;background:var(--brand);border-radius:4px 4px 0 0;min-height:2px;opacity:.8}
.moods{display:flex;gap:6px;flex-wrap:wrap}
/* 课程进度 */
.kpset{border:1px solid var(--line);border-radius:10px;margin:8px 0;padding:6px 10px 10px}.kpset legend{font-size:13px;color:var(--muted);padding:0 4px}
.kpchk{display:inline-flex;align-items:center;gap:4px;margin:4px 12px 4px 0;font-weight:400;font-size:14px;cursor:pointer}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%}.dot.mastered{background:var(--ok)}.dot.learning{background:var(--learn)}.dot.weak{background:var(--warn)}
details.card>summary{cursor:pointer;list-style:none}details.card>summary::-webkit-details-marker{display:none}
/* 问一问小助手 */
#askbtn{position:fixed;right:14px;bottom:calc(98px + env(safe-area-inset-bottom));z-index:40;border:none;border-radius:99px;background:var(--brand);color:var(--on-brand);padding:10px 14px;font-size:15px;box-shadow:0 4px 14px rgba(0,0,0,.18);cursor:pointer;display:flex;align-items:center;gap:4px}
#askpanel{position:fixed;right:10px;bottom:calc(98px + env(safe-area-inset-bottom));z-index:50;width:min(380px,calc(100vw - 20px));height:min(520px,70vh);background:var(--card,#fff);border:1px solid var(--line);border-radius:16px;box-shadow:0 10px 30px rgba(0,0,0,.2);display:none;flex-direction:column;padding:10px}
#askpanel.on{display:flex}
.askhead{display:flex;align-items:center;gap:6px}
#askctx{margin:6px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#askmsgs{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:8px;padding:4px 0}
.am{padding:8px 11px;border-radius:12px;max-width:88%;white-space:pre-wrap;font-size:15px;line-height:1.5}
.am.ai{background:var(--brand-2);align-self:flex-start}.am.user{background:var(--learn-2);align-self:flex-end}.am.err{background:var(--warn-2);color:var(--warn)}
#askchips{display:flex;gap:6px;flex-wrap:wrap;margin:6px 0}#askchips button{border:1px solid var(--line);background:transparent;border-radius:99px;padding:4px 10px;font-size:13px;cursor:pointer;color:inherit}
#askform{display:flex;gap:6px}#askform input{flex:1}
/* 自动发现 */
.finding{border-left:4px solid var(--line);padding:6px 10px;margin:6px 0;background:var(--bg);border-radius:0 8px 8px 0}
.finding.sev3{border-color:var(--warn)}.finding.sev2{border-color:var(--learn)}.finding.sev1{border-color:var(--brand)}
/* 连对 / 随手查 / 探索地图 / 前方 / 知识背景 */
#combo{position:fixed;right:16px;top:110px;background:#fff4d6;color:#8a5a00;border:1px solid #f1d38a;padding:6px 12px;border-radius:99px;font-weight:700;z-index:60;opacity:0;transform:scale(.8);transition:opacity .25s,transform .25s;pointer-events:none}
#combo.on{opacity:1;transform:scale(1)}
@keyframes bump{0%{transform:scale(1)}40%{transform:scale(1.35)}100%{transform:scale(1)}}
#combo.bump{animation:bump .35s ease-out}
#qlpanel{position:fixed;left:16px;right:16px;top:64px;margin:0 auto;max-width:560px;max-height:70vh;overflow:auto;background:var(--card,#fff);border:1px solid var(--line,#ddd);border-radius:14px;box-shadow:0 10px 30px rgba(0,0,0,.18);padding:12px;z-index:90;display:none}
#qlpanel.on{display:block;animation:pop .25s ease-out}
.explore .bar{height:10px;border-radius:99px;background:var(--line,#e5e5e5);overflow:hidden;margin:4px 0 10px}
.explore .bar span{display:block;height:100%;background:linear-gradient(90deg,var(--heat-4),var(--brand));border-radius:99px;transition:width 1s ease-out}
.explore .lit{display:inline-block;background:#fff4d6;border-radius:99px;padding:2px 10px;margin:2px 4px 2px 0;font-size:13px}
.ahead a{display:block;padding:8px 0;border-top:1px dashed var(--line,#e5e5e5);color:inherit;text-decoration:none}
.ahead a:first-of-type{border-top:0}
.probe-tag{display:inline-block;background:#eef4ff;color:#2a4d8f;border-radius:99px;padding:2px 10px;font-size:12px;margin-bottom:6px}
.ctxbox p{margin:6px 0}
#selmenu{position:absolute;display:none;gap:4px;background:#22252b;padding:4px;border-radius:12px;z-index:95;box-shadow:0 6px 20px rgba(0,0,0,.25)}
#selmenu.on{display:flex;animation:pop .18s ease-out}
#selmenu button{background:transparent;color:#fff;border:0;padding:8px 10px;border-radius:8px;font-size:14px;cursor:pointer;white-space:nowrap}
#selmenu button:hover{background:rgba(255,255,255,.15)}

/* 跟自己比：专注计时 + 和「上周的我」赛跑 */
.runbar{position:sticky;top:8px;z-index:5;background:var(--card,#fff);border:1px solid var(--line);border-radius:12px;padding:8px 12px;margin:8px 0}
.runbar .rt{font-variant-numeric:tabular-nums}
.race{position:relative;height:22px;margin-top:6px;background:linear-gradient(90deg,var(--line) 0,var(--line) 100%) center/100% 4px no-repeat}
.race i{position:absolute;top:0;font-style:normal;transform:translateX(-50%);transition:left .6s ease;font-size:16px;line-height:22px}
.race .me::before{content:"🏃"}
.race .ghost{opacity:.45}.race .ghost::before{content:"👻"}
.wkcard{border:2px solid #f1d38a;background:rgba(224,161,0,.07)}
.wkcard li{margin:2px 0}
.bridge{padding:4px 0;border-bottom:1px dashed var(--line)}.bridge:last-child{border-bottom:0}

/* 窄屏：标签页、提问按钮更紧凑 */
@media (max-width:480px){.tabset button{font-size:14px;padding:8px 6px}.card{padding:16px}
#askbtn span{display:none}#askbtn{width:56px;height:56px;padding:0;justify-content:center;font-size:24px}}
@media (min-width:900px){#askbtn,#askpanel{bottom:24px}}
/* 学科图标、掌握情况 */
.sico{display:inline-flex;align-items:center;justify-content:center;border-radius:12px;flex:none;line-height:1}
.ok-2{}.bar.mb{height:12px;margin:12px 0 8px}
.mleg{display:flex;gap:6px 14px;flex-wrap:wrap;font-size:13px;color:var(--muted)}.mleg b{color:var(--ink);font-variant-numeric:tabular-nums}
.mleg .dot{margin-right:4px;vertical-align:1px;background:var(--line)}
.dot.mastered{background:var(--ok)}.dot.learning{background:var(--learn)}.dot.weak{background:var(--warn)}
.subj{display:flex;flex-direction:column}.subj .top{display:flex;gap:12px;align-items:center}
.subj .top h2{margin:0;font-size:19px}.subj .ed{font-size:13px;color:var(--muted);line-height:1.4}
.subj .now{margin-top:12px;font-size:14px;background:var(--line-2);border-radius:10px;padding:8px 10px}
.subj .acts{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap;align-items:center}
.tiles{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:14px 0}
.tile{display:flex;gap:10px;align-items:center;padding:14px;border-radius:16px;background:var(--card);border:1px solid var(--line);color:var(--ink);box-shadow:var(--shadow);transition:transform .15s,border-color .15s}
.tile:hover{transform:translateY(-2px);border-color:var(--brand-3);color:var(--ink)}.tile .e{font-size:26px}.tile b{display:block;font-size:15px}.tile span{font-size:12.5px;color:var(--muted);line-height:1.35;display:block}
.refl{display:flex;gap:12px;align-items:baseline;padding:10px 0;border-bottom:1px dashed var(--line);font-size:15px}.refl:last-child{border-bottom:0}
.refl .dt{flex:0 0 52px;white-space:nowrap;font-weight:700;font-variant-numeric:tabular-nums}.refl .mood{font-size:18px}

/* 折叠卡片：右边有箭头，点开转向下 */
details.card>summary{position:relative;padding-right:28px;min-height:28px}
details.card>summary::after{content:"";position:absolute;right:4px;top:50%;width:9px;height:9px;border-right:2px solid var(--faint);border-bottom:2px solid var(--faint);transform:translateY(-70%) rotate(45deg);transition:transform .2s}
details.card:not([open])>summary::after{transform:translateY(-50%) rotate(-45deg)}
details.card[open]>summary{margin-bottom:8px}
/* 勾选项：整行可点，勾上后高亮 */
label:not(.seg *):has(>input[type=checkbox]),label:not(.seg *):has(>input[type=radio]){display:inline-flex;align-items:center;gap:8px;font-weight:500;margin:6px 0;cursor:pointer}
.kpchk{border:1.5px solid var(--line);border-radius:10px;padding:6px 10px!important;margin:4px 6px 4px 0!important;background:var(--card);transition:border-color .15s,background .15s}
.kpchk:hover{border-color:var(--brand-3)}.kpchk:has(input:checked){border-color:var(--brand);background:var(--brand-2)}
.kpset{border:1px solid var(--line);border-radius:14px;padding:8px 12px 12px;margin:10px 0}.kpset legend{font-weight:650;color:var(--muted);font-size:13px;padding:0 6px}
.chlist{display:flex;flex-direction:column;gap:6px;margin:6px 0}
.chrow{display:flex;align-items:center;gap:10px;border:1.5px solid var(--line);border-radius:12px;padding:8px 12px;background:var(--card)}
.chrow label{display:inline-flex;align-items:center;gap:6px;font-weight:400;cursor:pointer;margin:0}.chrow .grow{min-width:0}
.chrow:has(input[name=done_ch]:checked){background:var(--brand-2)}.chrow.cur{border-color:var(--brand)}
label.chrow{border-style:dashed}
.badge.warn{background:var(--warn)}
.qacts{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:14px}.qacts .submit{min-width:120px}.qacts .dkbtn{margin-left:auto}
@media (max-width:480px){.qacts .submit{flex:1}}
header.top .me{color:var(--ink);font-weight:600;margin-right:4px}
@media (max-width:420px){header.top .me .g{display:none}}
.autosum{background:linear-gradient(135deg,var(--sun-2),color-mix(in srgb,var(--sun-2) 30%,var(--card)));border-radius:14px;padding:12px 14px;line-height:1.7}

@media (max-width:480px){.step.next{flex-wrap:wrap}.step.next>.btn{flex:1 0 calc(100% - 50px);margin-left:50px}}
input[type=file]{width:100%;padding:14px;border:2px dashed var(--line);border-radius:14px;background:var(--line-2);color:var(--muted);font:inherit;font-size:14px;cursor:pointer}
input[type=file]:hover{border-color:var(--brand-3)}
input[type=file]::file-selector-button{font:inherit;font-weight:600;border:0;border-radius:10px;background:var(--brand);color:var(--on-brand);padding:9px 14px;margin-right:12px;cursor:pointer}
details:not(.card)>summary{cursor:pointer}
.flagrow{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:8px}.flagrow .linkbtn{font-size:12.5px;color:var(--muted)}
.evline{display:flex;flex-wrap:wrap;gap:6px 14px;background:var(--line-2);border-radius:12px;padding:8px 12px;margin:0 0 12px}
/* 题目里的代码（编程课：读代码、填代码） */
.q pre.code{margin:8px 0;padding:10px 12px;border-radius:10px;background:var(--line-2);font:13px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;overflow-x:auto;white-space:pre}
/* 乐园 */
a.card.arena-game{display:flex;align-items:center;gap:14px}.arena-game .grow{display:flex;flex-direction:column;gap:2px;min-width:0}
.statline b small{font-size:13px;font-weight:600;color:var(--muted)}
.arena-ico{width:56px;height:56px;border-radius:16px;background:var(--sun-2);display:flex;align-items:center;justify-content:center;font-size:30px;flex:none}

/* ===== beejoy：小伙伴形象 ===== */
.mascot{flex:none;display:block}
/* 今天页：小伙伴趴在卡片上沿，轻轻上下飞；全部完成时蹦一下 */
.hero .buddy{position:absolute;top:-22px;right:18px;filter:drop-shadow(0 4px 6px rgba(43,33,24,.15));animation:bob 3.2s ease-in-out infinite}
.hero .buddy.yay{animation:yay .9s cubic-bezier(.3,1.6,.5,1) 2,bob 3.2s ease-in-out 1.8s infinite}
@keyframes bob{0%,100%{transform:translateY(0) rotate(-3deg)}50%{transform:translateY(-5px) rotate(3deg)}}
@keyframes yay{0%,100%{transform:translateY(0) scale(1)}40%{transform:translateY(-16px) scale(1.12) rotate(-8deg)}}
.hero .pick{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;background:var(--brand-2);color:var(--brand-ink);border-radius:99px;padding:3px 10px 3px 4px;margin-top:8px}
.hero .pick .mascot{width:22px;height:22px}
@media (min-width:640px){.hero .buddy{right:auto;left:74px;top:-24px}}
/* 「我的账号」：选形象 */
.mascots{display:grid;grid-template-columns:repeat(auto-fill,minmax(132px,1fr));gap:10px;margin-top:10px}
.mascots label{margin:0;position:relative;cursor:pointer}
.mascots input{position:absolute;opacity:0;pointer-events:none}
.mascots .m{display:flex;flex-direction:column;align-items:center;text-align:center;gap:4px;padding:14px 8px 12px;border:2px solid var(--line);border-radius:18px;background:var(--card);
transition:border-color .15s,background .15s,transform .12s;height:100%}
.mascots .m:hover{border-color:var(--brand-3);transform:translateY(-2px)}
.mascots .m b{font-size:15px}.mascots .m small{font-size:12px;color:var(--muted);font-weight:400;line-height:1.45}
.mascots input:checked+.m{border-color:var(--brand);background:var(--brand-2)}
.mascots input:checked+.m::after{content:"✓";position:absolute;top:8px;right:10px;width:22px;height:22px;border-radius:50%;background:var(--brand);color:var(--on-brand);font-size:13px;font-weight:800;display:grid;place-items:center}
.mascots input:focus-visible+.m{box-shadow:var(--ring)}
.mascots .m .mascot{transition:transform .2s}.mascots input:checked+.m .mascot{transform:scale(1.08) rotate(-4deg)}
/* 登录页 */
.brandhero{display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px;margin:12px 0 4px}
.brandhero .wordmark{color:var(--ink)}.brandhero p{margin:0;color:var(--muted)}
/* 孩子：数字和英文用圆体，标题更圆润 */
[data-tone=kid] h1,[data-tone=kid] .hero .big-line{font-family:var(--f-round),-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
/* 成人：同一套颜色和组件，收一点「童趣」——小伙伴不在卡片上飞，乐园渐变也不出现 */
[data-tone=adult] .hero .buddy{display:none}
[data-tone=adult]{--radius:16px}
@media (prefers-reduced-motion:reduce){.hero .buddy,.hero .buddy.yay{animation:none}}
/* 深色底上，小伙伴身上的深色线条（触角、b 的竖）会看不见：加一圈浅色描边，像贴纸 */
@media (prefers-color-scheme:dark){.mascot{filter:drop-shadow(0 0 .6px #f3ecdd) drop-shadow(0 0 .6px #f3ecdd)}
.hero .buddy{filter:none}.hero .buddy .mascot{filter:drop-shadow(0 0 .6px #f3ecdd) drop-shadow(0 0 .6px #f3ecdd) drop-shadow(0 4px 6px rgba(0,0,0,.4))}}
#askbtn .mascot{width:26px;height:26px;filter:none}@media (max-width:480px){#askbtn .mascot{width:36px;height:36px}}
#askbtn{background:var(--card);color:var(--ink);border:2.5px solid var(--brand);box-shadow:0 6px 18px rgba(43,33,24,.18)}#askbtn:hover .mascot{transform:rotate(-8deg) scale(1.08)}#askbtn .mascot{transition:transform .2s}
/* 每天的正确率曲线（记录页、家长页）：坐标是百分比，图随宽度铺开 */
.tplot{position:relative;height:200px;margin:4px 6px 30px 40px}
.tplot.mini{height:56px;max-width:360px;margin:0 6px 8px}
.tplot svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.tplot polyline{fill:none;stroke:var(--brand-ink);stroke-width:2.5;stroke-linejoin:round;stroke-linecap:round}
.tplot.mini polyline{stroke-width:2}
.tplot .gl{position:absolute;left:0;right:0;border-top:1px solid var(--line)}
.tplot .gl.g80{border-top:1px dashed color-mix(in srgb,var(--ok) 60%,transparent)}
.tplot .gl span{position:absolute;right:100%;margin-right:6px;transform:translateY(-50%);font-size:11px;color:var(--faint);font-variant-numeric:tabular-nums;white-space:nowrap}
.tplot .xl{position:absolute;top:100%;margin-top:8px;transform:translateX(-50%);font-size:11px;color:var(--faint);white-space:nowrap;font-variant-numeric:tabular-nums}
.tplot .xl:last-child{transform:translateX(-85%)}
.tplot .pt{position:absolute;width:10px;height:10px;margin:-5px 0 0 -5px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 2px var(--card)}
.tplot.mini .pt{width:7px;height:7px;margin:-3.5px 0 0 -3.5px}
.tplot .pt.few{background:var(--card);box-shadow:inset 0 0 0 1.5px var(--brand-ink)}
.tplot a.pt::after{content:"";position:absolute;inset:-8px;border-radius:50%}
.tplot a.pt:hover,.tplot a.pt:focus-visible{box-shadow:0 0 0 2px var(--card),0 0 0 4px var(--brand-ink);outline:none}
.trend-leg{gap:14px}.trend-leg span{display:inline-flex;align-items:center;gap:5px}
.trend-leg .pt-i{width:10px;height:10px;border-radius:50%;background:var(--brand)}
.trend-leg .pt-i.few{background:var(--card);border:1.5px solid var(--brand-ink)}
.trend-leg .avg-i{width:18px;height:0;border-radius:0;border-top:2.5px solid var(--brand-ink)}
.trend-leg .g80-i{width:18px;height:0;border-radius:0;border-top:1px dashed var(--ok)}
/* 朗读 */
.btn.say{min-height:32px;padding:2px 8px;font-size:15px;vertical-align:middle}.btn.say.saying{animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.45}}
.listenbar{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding:8px 10px;margin:8px 0;
background:color-mix(in srgb,var(--card) 94%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}
.listenbar .on{background:var(--learn-2);color:var(--learn)}
.lp{transition:background .3s;border-radius:8px}.lp.reading{background:var(--learn-2);box-shadow:0 0 0 6px var(--learn-2)}
/* 书库 */
.shelf{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin:10px 0 18px}
.book{display:flex;flex-direction:column;gap:4px;padding:12px;border-radius:16px;background:var(--card);border:1px solid var(--line);color:var(--ink);box-shadow:var(--shadow);transition:transform .15s}
.book:hover{transform:translateY(-2px);color:var(--ink)}.book b{font-size:15px;line-height:1.3}.book .daybar{height:8px;margin:2px 0 0}
.cover{display:flex;align-items:center;justify-content:center;height:96px;border-radius:12px;font-size:44px;
background:linear-gradient(150deg,hsl(var(--h) 70% 88%),hsl(calc(var(--h) + 40) 70% 78%))}
@media (prefers-color-scheme:dark){.cover{background:linear-gradient(150deg,hsl(var(--h) 30% 26%),hsl(calc(var(--h) + 40) 30% 20%))}}
.cover.big{width:110px;height:140px;flex:none;font-size:56px}
.bookhead{display:flex;gap:16px;align-items:flex-start;margin:10px 0}
.chmap{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:8px}
.chmap .ch{display:flex;gap:10px;align-items:center;padding:10px 12px;border-radius:14px;border:1px solid var(--line);background:var(--card);color:var(--ink)}
.chmap .ch .n{flex:none;width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--line-2);font-weight:700;font-size:13px}
.chmap .ch .t{flex:1;font-size:14px;line-height:1.3}.chmap .ch.done .n{background:var(--ok-2);color:var(--ok)}
.chmap .ch.now{border-color:var(--learn);box-shadow:0 0 0 3px var(--learn-2)}
.chtitle{text-align:center;margin:14px 0 6px}
.book-text{font-size:19px;line-height:1.85}.book-text.big{font-size:22px}.book-text.bigger{font-size:26px;line-height:1.9}
.book-text p{margin:0 0 .9em;position:relative}
.paraq{margin-left:6px;border:1px solid var(--line);background:var(--card);color:var(--faint);border-radius:8px;font-size:12px;padding:0 6px;cursor:pointer;vertical-align:middle;line-height:1.6}
.paraq:hover{color:var(--ink)}
.pager{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:14px 0 30px}
.prep .chip .btn.say{min-height:24px;padding:0 4px;font-size:13px}
#listenhere{position:sticky;top:64px;z-index:15}