/* ============ KSN·CET4 甜系液玻 · 设计系统 v2 ============
   浅色默认（iOS 26 风）：白玻璃 + 深字 + 糖果渐变；body[data-mode=night] 翻转为暗色霜玻璃 */

/* ---- 设计变量（浅色默认） ---- */
:root{
  --ink:#1d2a44; --ink-dim:rgba(29,42,68,.62);
  --cardA:.66; --cardB:.44;             /* 玻璃浓度（滑杆 5-14 → .40-.90 映射） */
  --card-brd:rgba(255,255,255,.85);
  --card-sh:0 12px 34px rgba(130,150,255,.20);
  --card-inset:inset 0 1px 0 rgba(255,255,255,.9);
  --txsh:0 1px 0 rgba(255,255,255,.55);
  --c1:#ec86c0; --c2:#8b5cf6; --c3:#38bdf8;   /* 糖果三色 */
  --ac:linear-gradient(135deg,#ec86c0 0%,#8b5cf6 50%,#38bdf8 100%);
  --ok:#10b981; --bad:#f43f5e; --warn:#f59e0b;
  --r-lg:20px; --r-md:14px;
  --font:-apple-system,"SF Pro Text","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --serif:"New York",Georgia,"Songti SC",serif;
  --hh:60px; --tbh:60px;
  --wall-op:.8;
}
/* 夜间（暗色霜玻璃）翻转 */
body[data-mode="night"]{
  --ink:#eaf3ff; --ink-dim:rgba(226,238,255,.62);
  --cardA:.58; --cardB:.5;
  --card-brd:rgba(255,255,255,.12);
  --card-sh:0 12px 34px rgba(0,0,0,.45);
  --card-inset:inset 0 1px 0 rgba(255,255,255,.14);
  --txsh:0 1px 2px rgba(0,0,0,.5);
  --wall-op:.5;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; min-height:100vh; background:#e9f2ff; color:var(--ink);
  font:16px/1.6 var(--font); text-shadow:var(--txsh);
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
  transition:background 1.2s ease,color 1.2s ease;
}
body[data-mode="night"]{background:#050b18}
::selection{background:rgba(139,92,246,.28)}
:: -webkit-scrollbar{width:0}

/* ---- 背景层（z0 渐变 → z1/2 壁纸 → 纱幕 → z3 焦散）---- */
#cssbg{position:fixed;inset:0;z-index:0;background:
  linear-gradient(180deg,#cfe9ff 0%,#efe3ff 48%,#ffe3f1 100%);
  transition:background 1.5s ease;}
.wall{position:fixed;inset:0;z-index:1;background-size:cover;background-position:center;
  opacity:0;transition:opacity 1.5s ease;pointer-events:none;
  animation:zoompan 36s ease-in-out infinite alternate;}
.wall.on{opacity:var(--wall-op)}
@keyframes zoompan{from{transform:scale(1.05)}to{transform:scale(1.13)}}
#veil{position:fixed;inset:0;z-index:2;pointer-events:none;opacity:0;transition:opacity 1.2s ease;
  background:linear-gradient(180deg,rgba(255,255,255,.62) 0%,rgba(255,255,255,.34) 45%,rgba(255,255,255,.55) 100%);}
#bgc{position:fixed;inset:0;z-index:3;pointer-events:none;mix-blend-mode:screen;opacity:.18}
@media (prefers-reduced-motion:reduce){.wall{animation:none}#bgc{display:none}}

/* ---- 顶导航 ---- */
#topnav{position:fixed;top:0;left:0;right:0;height:var(--hh);z-index:20;
  display:flex;align-items:center;gap:14px;padding:0 14px;
  background:rgba(255,255,255,.55);
  -webkit-backdrop-filter:blur(18px) saturate(180%);backdrop-filter:blur(18px) saturate(180%);
  border-bottom:1px solid rgba(255,255,255,.65);box-shadow:0 4px 24px rgba(150,170,255,.14);
  transition:background 1s ease;}
body[data-mode="night"] #topnav{background:rgba(8,16,34,.5);border-bottom-color:rgba(255,255,255,.08);box-shadow:none}
.tn-logo{font-weight:900;letter-spacing:.4px;font-size:16px;background:var(--ac);-webkit-background-clip:text;background-clip:text;color:transparent;white-space:nowrap}
.tn-links{display:flex;gap:2px;flex:1;overflow-x:auto;scrollbar-width:none;align-items:center}
.tn-links::-webkit-scrollbar{display:none}
.tn-links a{flex:none;padding:6px 11px;border-radius:11px;font-size:13.5px;font-weight:600;color:var(--ink-dim);text-decoration:none;transition:.15s}
.tn-links a.on,.tn-links a:hover{color:var(--ink);background:rgba(139,92,246,.14)}
body[data-mode="night"] .tn-links a.on,body[data-mode="night"] .tn-links a:hover{background:rgba(139,92,246,.22)}
.tn-acct{flex:none;border:1px solid rgba(255,255,255,.8);background:rgba(255,255,255,.6);color:var(--ink);
  padding:6px 14px;border-radius:99px;font-size:13px;font-weight:600;cursor:pointer;transition:.15s}
.tn-acct:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(130,150,255,.3)}
.tn-acct .ic{width:14px;height:14px;vertical-align:-2px}
.tn-acct.on{background:linear-gradient(135deg,rgba(236,134,192,.3),rgba(139,92,246,.3) 55%,rgba(56,189,248,.3));border-color:rgba(255,255,255,.9)}
body[data-mode="night"] .tn-acct{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.2);color:var(--ink)}

/* ---- 底部 tab（浅色玻璃胶囊 + 糖果指示）---- */
#tabbar{position:fixed;bottom:calc(10px + env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);z-index:20;
  display:none;gap:2px;padding:7px;border-radius:24px;max-width:calc(100vw - 16px);
  background:rgba(255,255,255,.72);-webkit-backdrop-filter:blur(26px) saturate(180%);backdrop-filter:blur(26px) saturate(180%);
  border:1px solid rgba(255,255,255,.9);box-shadow:0 14px 40px rgba(130,150,255,.3),var(--card-inset);}
body[data-mode="night"] #tabbar{background:rgba(10,16,34,.7);border-color:rgba(255,255,255,.14);box-shadow:0 14px 40px rgba(0,0,0,.5)}
.tb{display:flex;flex-direction:column;align-items:center;gap:2px;min-width:58px;padding:5px 8px 4px;border:0;border-radius:16px;
  background:transparent;color:var(--ink-dim);font-size:10px;font-weight:600;cursor:pointer;
  transition:transform .18s cubic-bezier(.34,1.56,.64,1),background .25s,color .2s}
.tb svg{width:20px;height:20px;opacity:.6;transition:.2s}
.tb.on{color:var(--ink);background:linear-gradient(140deg,rgba(236,134,192,.3),rgba(139,92,246,.3) 55%,rgba(56,189,248,.3))}
.tb.on svg{opacity:1;filter:drop-shadow(0 0 6px rgba(139,92,246,.6))}
.tb:active{transform:scale(.92)}
@media (max-width:860px){#tabbar{display:flex}#topnav .tn-links{display:none}#topnav{justify-content:space-between}
  #app{padding-bottom:calc(var(--tbh) + 40px + env(safe-area-inset-bottom))}}
@media (min-width:861px){#app{padding-bottom:40px}}

/* ---- 主区 ---- */
#app{position:relative;z-index:5;max-width:900px;margin:0 auto;padding:calc(var(--hh) + 18px) 12px 60px}
@media (min-width:861px){#app{padding:calc(var(--hh) + 26px) 18px}}
h1{font-size:22px;margin:0 0 4px;font-weight:800;letter-spacing:.2px}
h2{font-size:16.5px;margin:0 0 10px;font-weight:800}
.sub{color:var(--ink-dim);font-size:13px}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.grid{display:grid;gap:10px}
.grid.g2{grid-template-columns:1fr 1fr}
.grid.g3{grid-template-columns:1fr 1fr}
.grid.g4{grid-template-columns:1fr 1fr}
@media (min-width:700px){.grid.g3{grid-template-columns:repeat(3,1fr)}.grid.g4{grid-template-columns:repeat(4,1fr)}}
.card p{margin:.3em 0}

/* ---- 玻璃卡（白玻璃 + 彩色柔影 + 棱镜顶边）---- */
.card{position:relative;border-radius:var(--r-lg);overflow:hidden;
  background:linear-gradient(165deg, rgba(255,255,255,var(--cardA)) 0%, rgba(255,255,255,var(--cardB)) 100%);
  -webkit-backdrop-filter:blur(18px) saturate(170%);backdrop-filter:blur(18px) saturate(170%);
  border:1px solid var(--card-brd);box-shadow:var(--card-sh),var(--card-inset);
  padding:14px;margin-bottom:12px;transition:background 1s ease,border-color 1s ease,box-shadow 1s ease}
.card::before{content:"";position:absolute;top:0;left:8%;right:8%;height:2px;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(236,134,192,.7) 25%,rgba(139,92,246,.7) 55%,rgba(56,189,248,.65) 80%,transparent);opacity:.7}
/* 镭射 holo */
.holo::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .3s;
  background:radial-gradient(340px 130px at var(--mx,50%) var(--my,0%),rgba(255,180,230,.22),transparent 70%),
             linear-gradient(120deg,transparent 32%,rgba(139,92,246,.12) 47%,rgba(56,189,248,.14) 58%,transparent 72%);}
.holo:hover::after{opacity:1}

/* ---- 标题区 ---- */
.pagehead{display:flex;align-items:baseline;gap:10px;margin:2px 0 12px;flex-wrap:wrap}
.pagehead h1{background:linear-gradient(92deg,#37306b 0%,#7c3aed 45%,#0ea5e9 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
body[data-mode="night"] .pagehead h1{background:linear-gradient(90deg,#fff,rgba(110,231,255,.9));-webkit-background-clip:text;background-clip:text}

/* ---- 按钮（糖果渐变 + 弹性）---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;
  border:1px solid rgba(255,255,255,.85);background:rgba(255,255,255,.62);color:var(--ink);
  padding:9px 16px;border-radius:13px;font-size:14px;font-weight:700;cursor:pointer;text-decoration:none;
  box-shadow:0 4px 14px rgba(130,150,255,.18),var(--card-inset);
  transition:transform .15s cubic-bezier(.34,1.56,.64,1),box-shadow .2s,background .2s}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(130,150,255,.32)}
.btn:active{transform:scale(.96)}
body[data-mode="night"] .btn{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.2)}
.btn.pri{background:var(--ac);border:1px solid rgba(255,255,255,.55);color:#fff;text-shadow:0 1px 2px rgba(60,30,90,.35);
  box-shadow:0 6px 20px rgba(160,110,250,.4)}
.btn.pri:hover{box-shadow:0 10px 26px rgba(160,110,250,.55)}
.btn.ok{background:linear-gradient(135deg,#6ee7b7,#10b981);border-color:rgba(255,255,255,.5);color:#06332a;box-shadow:0 6px 18px rgba(16,185,129,.35)}
.btn.bad{background:linear-gradient(135deg,#fda4af,#f43f5e);border-color:rgba(255,255,255,.5);color:#fff;box-shadow:0 6px 18px rgba(244,63,94,.35)}
.btn.sm{padding:5px 12px;font-size:12.5px;border-radius:10px}
.btn:disabled{opacity:.45;pointer-events:none}
.chip{display:inline-flex;align-items:center;gap:5px;padding:5px 12px;border-radius:99px;font-size:12.5px;font-weight:700;
  background:rgba(255,255,255,.55);border:1px solid rgba(255,255,255,.8);color:var(--ink-dim);cursor:pointer;
  transition:.15s;user-select:none;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.chip svg{width:13px;height:13px}
.chip.on,.chip:hover{color:var(--ink);border-color:rgba(139,92,246,.55);background:linear-gradient(135deg,rgba(236,134,192,.22),rgba(139,92,246,.2),rgba(56,189,248,.2))}
body[data-mode="night"] .chip{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.18)}
.chip.ok{background:rgba(16,185,129,.16);border-color:rgba(16,185,129,.5);color:#0c7a5c}
.chip.bad{background:rgba(244,63,94,.14);border-color:rgba(244,63,94,.5);color:#be123c}

/* ---- 图标 ---- */
.ic{width:18px;height:18px;flex:none}
.ic.lg{width:44px;height:44px}
.ico{flex:none;width:42px;height:42px;border-radius:14px;display:flex;align-items:center;justify-content:center;color:#fff;
  background:var(--ac);box-shadow:0 6px 16px rgba(160,110,250,.35),inset 0 1px 0 rgba(255,255,255,.4)}
.ico svg{width:21px;height:21px}
.modcard{display:flex;gap:11px;align-items:center;padding:12px;border-radius:var(--r-md);
  background:linear-gradient(160deg, rgba(255,255,255,var(--cardA)), rgba(255,255,255,var(--cardB)));
  -webkit-backdrop-filter:blur(14px) saturate(160%);backdrop-filter:blur(14px) saturate(160%);
  border:1px solid var(--card-brd);box-shadow:0 5px 16px rgba(130,150,255,.16),var(--card-inset);
  transition:transform .16s cubic-bezier(.34,1.56,.64,1),border-color .2s}
.modcard:hover{transform:translateY(-2px);border-color:rgba(139,92,246,.5)}
.modcard b{display:block;font-size:14.5px}
.modcard .muted{font-size:11.5px;max-width:100%;white-space:nowrap;text-overflow:ellipsis;overflow:hidden}

/* ---- 统计格 ---- */
.stat-cell{display:flex;flex-direction:column;gap:2px;padding:12px 14px;min-width:0}
.stat-cell b{font-size:24px;font-weight:900;background:linear-gradient(92deg,var(--c1),var(--c2) 55%,var(--c3));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-cell span{font-size:11.5px;color:var(--ink-dim);font-weight:600}
@media (max-width:699px){.stat-cell{padding:10px 12px}.stat-cell b{font-size:20px}}

/* ---- 闪卡（浅玻璃 + 糖果描边光）---- */
.fstack{position:relative;height:392px;margin:6px auto 0;max-width:500px}
.fcard{position:absolute;inset:0;perspective:1400px;cursor:grab;touch-action:none;will-change:transform}
.fface{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:26px;
  background:linear-gradient(170deg, rgba(255,255,255,.86), rgba(244,240,255,.62));
  -webkit-backdrop-filter:blur(22px) saturate(180%);backdrop-filter:blur(22px) saturate(180%);
  border:1px solid rgba(255,255,255,.95);
  box-shadow:0 20px 50px rgba(140,160,255,.35), inset 0 1px 0 rgba(255,255,255,.95);
  display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center;overflow:auto;
  transition:transform .35s cubic-bezier(.3,1.2,.4,1);will-change:transform}
body[data-mode="night"] .fface{background:linear-gradient(170deg,rgba(24,36,72,.9),rgba(8,13,30,.88));border-color:rgba(255,255,255,.2);box-shadow:0 20px 50px rgba(0,0,0,.55)}
.fface.back{transform:rotateY(180deg)}
.fcard.flip .fface.front{transform:rotateY(180deg)}
.fcard.flip .fface.back{transform:rotateY(0deg)}
.fword{font-size:42px;font-weight:900;letter-spacing:.4px;background:linear-gradient(92deg,#4c3d8f,#7c3aed 55%,#0891b2);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 2px 10px rgba(139,92,246,.35))}
body[data-mode="night"] .fword{background:linear-gradient(92deg,#fff,#a5f3fc 60%,#f0abfc);-webkit-background-clip:text;background-clip:text}
.fpos{color:#7c3aed;font-size:13.5px;font-weight:800;margin-top:4px}
body[data-mode="night"] .fpos{color:#67e8f9}
.fflip{position:absolute;bottom:14px;font-size:11.5px;color:var(--ink-dim)}
.fcnc{font-size:23px;font-weight:800}
.fex{font-size:13.5px;color:var(--ink-dim);margin-top:10px;line-height:1.7}
.fp{margin-top:12px;font-size:12.5px;color:var(--ink-dim);text-align:left;width:100%;line-height:1.9}
.fp b{color:#7c3aed;font-weight:700}
.fmni{margin-top:12px;font-size:13px;line-height:1.8;background:linear-gradient(135deg,rgba(236,134,192,.16),rgba(139,92,246,.14),rgba(56,189,248,.14));
  border:1px solid rgba(139,92,246,.3);border-radius:14px;padding:10px 12px;text-align:left;width:100%}
body[data-mode="night"] .fmni{background:rgba(139,92,246,.14);border-color:rgba(139,92,246,.4);color:#d9ccff}
.fglow{position:absolute;inset:0;border-radius:26px;pointer-events:none;opacity:0;transition:opacity .15s}
.fglow.okg{box-shadow:0 0 0 3px rgba(16,185,129,.75) inset;background:rgba(16,185,129,.14)}
.fglow.badg{box-shadow:0 0 0 3px rgba(244,63,94,.75) inset;background:rgba(244,63,94,.14)}
.fbtns{display:flex;justify-content:center;gap:10px;margin-top:14px}

/* ---- 题目 ---- */
.q{padding:11px 0;border-bottom:1px solid rgba(99,102,241,.12)}
body[data-mode="night"] .q{border-bottom-color:rgba(255,255,255,.08)}
.q:last-child{border-bottom:0}
.q-stem{font-size:15px;line-height:1.75;margin-bottom:8px;white-space:pre-wrap}
.q-stem .no{color:#7c3aed;font-weight:800;margin-right:4px}
body[data-mode="night"] .q-stem .no{color:#67e8f9}
.q-opts{display:grid;gap:6px}
@media (min-width:700px){.q-opts{grid-template-columns:1fr 1fr}}
.q-opt{display:flex;gap:8px;align-items:flex-start;padding:8px 10px;border-radius:12px;
  border:1px solid rgba(255,255,255,.7);background:rgba(255,255,255,.55);
  font-size:14px;line-height:1.55;cursor:pointer;transition:.12s;user-select:none;
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
body[data-mode="night"] .q-opt{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.14)}
.q-opt:hover{background:rgba(236,134,192,.14)}
.q-opt.sel{border-color:rgba(139,92,246,.7);background:linear-gradient(135deg,rgba(236,134,192,.2),rgba(139,92,246,.18),rgba(56,189,248,.16))}
.q-opt.right{border-color:rgba(16,185,129,.7);background:rgba(16,185,129,.14)}
.q-opt.wrong{border-color:rgba(244,63,94,.7);background:rgba(244,63,94,.12)}
.q-opt .li{flex:none;font-weight:900;color:var(--ink-dim);min-width:18px}
.q-exp{margin-top:8px;font-size:13px;color:#9a3412;background:linear-gradient(135deg,rgba(255,237,213,.8),rgba(255,214,238,.7));
  border-left:3px solid var(--warn);padding:8px 10px;border-radius:8px;line-height:1.7;white-space:pre-wrap}
body[data-mode="night"] .q-exp{color:#ffd9a8;background:rgba(251,191,36,.1);border-left-color:rgba(251,191,36,.6)}
.bank{display:flex;flex-wrap:wrap;gap:7px;margin:10px 0}
.bank span{padding:4px 10px;border-radius:10px;font-size:12.5px;font-weight:700;background:rgba(139,92,246,.12);
  border:1px solid rgba(139,92,246,.35);color:#6d28d9}
body[data-mode="night"] .bank span{background:rgba(139,92,246,.18);border-color:rgba(139,92,246,.45);color:#c4b5fd}
.bank button{cursor:pointer;background:rgba(255,255,255,.6);border:1px solid rgba(255,255,255,.85);color:var(--ink);
  padding:4px 10px;border-radius:10px;font-size:12.5px;font-weight:700;transition:.12s}
.bank button:hover{background:linear-gradient(135deg,rgba(236,134,192,.3),rgba(56,189,248,.28))}
.bank button.used{opacity:.35;text-decoration:line-through}
.blank{display:inline-block;min-width:52px;text-align:center;padding:1px 8px;margin:0 2px;border-radius:8px;cursor:pointer;
  border-bottom:2px dashed rgba(139,92,246,.65);color:#7c3aed;font-weight:800}
body[data-mode="night"] .blank{color:#a5f3fc;border-bottom-color:rgba(110,231,255,.7)}
.blank.filled{border-bottom-style:solid;background:rgba(139,92,246,.12)}

/* ---- 阅读器 ---- */
.reader{max-width:760px;margin:0 auto}
.reader .para{font:16px/1.85 var(--serif);margin:0 0 14px}
.reader .para.marksel{background:rgba(139,92,246,.12);box-shadow:0 0 0 2px rgba(139,92,246,.4);border-radius:6px}
.reader.dark{color:#f1f5ff;background:linear-gradient(170deg,rgba(22,33,66,.96),rgba(10,16,38,.94));
  border-color:rgba(255,255,255,.16);box-shadow:0 20px 50px rgba(8,12,30,.5)}
.reader.dark .para{color:#dbe4ff}
.reader.dark .trline{color:#a8e6ff;background:rgba(10,20,44,.7);border-left-color:#67e8f9}
.trline{font-size:14px;color:#4c3d8f;background:rgba(255,255,255,.75);border-left:3px solid #7c3aed;
  padding:8px 12px;border-radius:8px;margin:-6px 0 14px;line-height:1.8}
body[data-mode="night"] .trline{color:#a8e6ff;background:rgba(5,20,40,.6)}
.bookcard{display:flex;gap:12px;align-items:center}
.bcover{flex:none;width:62px;height:88px;border-radius:9px;display:flex;align-items:center;justify-content:center;
  font-size:24px;font-weight:900;color:#fff;box-shadow:0 8px 20px rgba(120,90,255,.35);position:relative;overflow:hidden}
.bcover::after{content:"";position:absolute;inset:0;background:linear-gradient(115deg,rgba(255,255,255,.4),transparent 42%)}

/* ---- 弹层/提示（浅玻璃）---- */
.modal{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;padding:16px}
.modal[hidden]{display:none}
.modal .mask{position:absolute;inset:0;background:rgba(140,160,220,.35);-webkit-backdrop-filter:blur(28px);backdrop-filter:blur(28px)}
body[data-mode="night"] .modal .mask{background:rgba(0,0,5,.45)}
.modal .panel{position:relative;width:100%;max-width:480px;max-height:82vh;overflow:auto;border-radius:22px;
  background:rgba(255,255,255,.9);-webkit-backdrop-filter:blur(28px);backdrop-filter:blur(28px);
  border:1px solid rgba(255,255,255,.95);box-shadow:0 24px 60px rgba(130,150,255,.35),var(--card-inset);
  padding:18px;animation:pop .25s cubic-bezier(.34,1.56,.64,1)}
body[data-mode="night"] .modal .panel{background:rgba(14,22,44,.92);border-color:rgba(255,255,255,.14)}
@keyframes pop{from{transform:scale(.95);opacity:0}to{transform:scale(1);opacity:1}}
#toast{position:fixed;bottom:calc(84px + env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);z-index:60;
  background:rgba(255,255,255,.85);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.95);color:var(--ink);padding:9px 18px;border-radius:99px;font-size:13px;font-weight:600;
  box-shadow:0 8px 24px rgba(130,150,255,.35);opacity:0;transition:opacity .25s,transform .25s;pointer-events:none;max-width:86vw;text-align:center}
body[data-mode="night"] #toast{background:rgba(10,18,38,.9);color:var(--ink);border-color:rgba(255,255,255,.15)}
#toast.on{opacity:1;transform:translateX(-50%) translateY(-6px)}

/* ---- 表单 ---- */
.inp{width:100%;padding:9px 13px;border-radius:12px;border:1px solid rgba(180,200,255,.65);
  background:rgba(255,255,255,.7);color:var(--ink);font-size:14px;outline:none;transition:.15s;font-weight:500}
.inp::placeholder{color:var(--ink-dim);font-weight:400}
.inp:focus{border-color:#8b5cf6;box-shadow:0 0 0 3px rgba(139,92,246,.18)}
body[data-mode="night"] .inp{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.18);color:var(--ink)}
textarea.inp{min-height:110px;resize:vertical;line-height:1.7}
label.f{display:block;font-size:12px;color:var(--ink-dim);margin:12px 0 5px;font-weight:700}
select.inp{appearance:none}
.rng{width:100%;accent-color:#8b5cf6;height:4px}

/* ---- 统计 ---- */
.spark{width:100%;height:64px;display:block}

/* ---- 动效 ---- */
.stagger>*{opacity:0;transform:translateY(12px);animation:rise .5s cubic-bezier(.2,.9,.3,1) forwards}
@keyframes rise{to{opacity:1;transform:none}}
.spin{display:inline-block;width:15px;height:15px;border:2px solid rgba(139,92,246,.25);border-top-color:#8b5cf6;border-radius:50%;animation:rot .7s linear infinite}
@keyframes rot{to{transform:rotate(360deg)}}
.muted{color:var(--ink-dim);font-size:12.5px}
.tag{display:inline-block;padding:2px 9px;border-radius:99px;font-size:11px;font-weight:800;
  background:linear-gradient(135deg,rgba(236,134,192,.22),rgba(139,92,246,.2));
  border:1px solid rgba(139,92,246,.35);color:#6d28d9}
body[data-mode="night"] .tag{background:rgba(139,92,246,.2);border-color:rgba(139,92,246,.5);color:#c4b5fd}
.audio-wrap{display:flex;align-items:center;gap:10px}
.audio-wrap .bar{flex:1;height:5px;background:rgba(139,92,246,.15);border-radius:99px;overflow:hidden}
.audio-wrap .bar i{display:block;height:100%;width:0;background:var(--ac);border-radius:99px;transition:width .2s}
.tts-btn{flex:none;width:36px;height:36px;border-radius:50%;cursor:pointer;font-size:15px;transition:.15s;
  border:1px solid rgba(255,255,255,.85);background:var(--ac);color:#fff;box-shadow:0 5px 14px rgba(160,110,250,.4);
  display:flex;align-items:center;justify-content:center}
.tts-btn svg{width:17px;height:17px}
.tts-btn:hover{transform:scale(1.1);box-shadow:0 8px 20px rgba(160,110,250,.55)}
.credit,.footer-note{margin-top:26px;font-size:11px;color:rgba(29,42,68,.42);text-align:center;line-height:1.8}
body[data-mode="night"] .credit,body[data-mode="night"] .footer-note{color:rgba(226,238,255,.35)}
@media (min-width:861px){.credit,.footer-note{margin-top:40px}}

/* ---- 今日目标环（激励） ---- */
.goalcard{display:flex}
.ring{flex:none;width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;position:relative;
  background:conic-gradient(var(--c2) calc(var(--p, 0) * 1%), rgba(139,92,246,.14) 0)}
.ring::before{content:"";position:absolute;inset:5px;border-radius:50%;background:rgba(255,255,255,.94)}
body[data-mode="night"] .ring::before{background:rgba(12,18,38,.94)}
.ring b{position:relative;font-size:14px;font-weight:900;color:var(--c2)}

/* ---- 成就墙（激励） ---- */
.achg{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
@media (max-width:699px){.achg{grid-template-columns:repeat(2,1fr)}}
.achi{display:flex;flex-direction:column;gap:6px;padding:10px;border-radius:14px;background:rgba(255,255,255,.5);border:1px solid var(--card-brd)}
.achi.on{background:linear-gradient(160deg,rgba(236,134,192,.2),rgba(139,92,246,.18),rgba(56,189,248,.16));border-color:rgba(139,92,246,.45)}
.achi .ico{width:34px;height:34px;border-radius:11px}
.achi .ico svg{width:17px;height:17px}
.achi .ico.dim{filter:grayscale(1);opacity:.35}

/* ---- 学习记录行（我的） ---- */
.recrow{margin:7px 0;padding:6px 4px;border-radius:10px}
.recrow.on{background:linear-gradient(135deg,rgba(236,134,192,.16),rgba(139,92,246,.14));border:1px solid rgba(139,92,246,.3)}

/* ---- 纸张偏黄（阅读器 parchment） ---- */
.reader{background:linear-gradient(168deg,rgba(253,249,236,.96) 0%,rgba(247,237,209,.9) 100%);
  border-color:rgba(226,206,158,.55);box-shadow:0 14px 34px rgba(170,150,90,.2),var(--card-inset)}
.reader .para{color:#454030}
.reader .sub{color:rgba(69,64,48,.6)}
body[data-mode="night"] .reader{background:linear-gradient(168deg,rgba(24,33,64,.94),rgba(10,16,38,.92));border-color:rgba(255,255,255,.14)}
body[data-mode="night"] .reader .para{color:var(--ink)}
.avatar{width:52px;height:52px;border-radius:50%;flex:none;display:flex;align-items:center;justify-content:center;
  background:var(--ac);color:#fff;font-size:22px;font-weight:900;box-shadow:0 6px 18px rgba(160,110,250,.4);
  border:2px solid rgba(255,255,255,.8)}
.avatar.ghost{background:rgba(255,255,255,.55);color:var(--c2);border-style:dashed;box-shadow:0 4px 14px rgba(160,110,250,.18)}
.avatar .ic.av{width:26px;height:26px}
.card.acct{background:linear-gradient(165deg, rgba(255,255,255,calc(var(--cardA) + .12)), rgba(244,238,255,calc(var(--cardB) + .12)))}