/* ============================================================
   学迹家长端 · 移动端优先样式表（单一来源，无重复覆盖）
   结构：变量/reset → 布局 → 通用组件 → 各页面 → 弹层 → 认证 → 动效
   断点：仅用 min-width 做大屏增强，移动端即默认样式。
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --bg:#fbf6ed; --bg-outer:#f2e9d9; --ink:#3a2d24; --muted:#8c7a67; --muted-2:#b6a58e;
  --line:#eadcc9; --card:#fffcf5;
  --blue:#e2763f; --blue-soft:#fce9d8; --blue-deep:#c45925; --blue-mid:#f2a36d;
  --brand:var(--blue); --brand-soft:var(--blue-soft);
  --green:#3f9b6e; --green-deep:#2f7d57; --success-soft:#e4f4e9;
  --orange:#e08a3c; --orange-deep:#b96a24; --warning-soft:#fdeed8;
  --danger:#d95d4e; --danger-deep:#b03f33; --danger-soft:#fde5e1;
  --purple:#8a6cc9; --purple-soft:#f0eafb;
  --pink:#e0768f;
  --neutral-1:#fdfaf4; --neutral-2:#f5eee2; --neutral-3:#e6dac8; --neutral-6:#8b7b68;
  --radius-sm:8px; --radius-md:12px; --radius-lg:16px; --radius-xl:20px; --radius-2xl:24px;
  --shadow-card:0 4px 0 rgba(190,148,104,.16),0 10px 22px rgba(160,120,80,.10);
  --shadow-float:0 6px 0 rgba(190,148,104,.18),0 16px 34px rgba(160,120,80,.14);
  --shadow-layer:0 20px 52px rgba(80,55,35,.20);
  --fs-xs:11px; --fs-sm:12px; --fs-md:13px; --fs-body:15px; --fs-lg:17px; --fs-xl:20px; --fs-2xl:24px;
  --nav-h:64px;
  --maxw:520px;
}

/* ---------- 2. Reset ---------- */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;background:var(--bg-outer)}
body{
  margin:0; background:var(--bg-outer); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:var(--fs-body); line-height:1.6;
  min-width:320px; overflow-x:hidden; -webkit-tap-highlight-color:transparent;
}
button{font:inherit; color:inherit; border:0; background:none; cursor:pointer; padding:0}
h1,h2,h3,h4{margin:0; font-weight:800; line-height:1.35}
p{margin:0}
input,textarea,select{font:inherit; color:var(--ink); background:#fff}
a{color:var(--blue); text-decoration:none}
img{max-width:100%}
[hidden]{display:none!important}

/* 图标统一用描边，避免 Safari 渲染为实心块 */
.ui-icon,.ui-icon *{fill:none!important; stroke:currentColor!important}
.ui-icon{width:24px; height:24px; display:block; stroke-width:1.8; stroke-linecap:round; stroke-linejoin:round; flex:none}

/* ---------- 3. 基础布局 ---------- */
.app-shell{
  width:100%; max-width:var(--maxw); min-height:100dvh; margin:0 auto;
  background:var(--bg); position:relative;
  padding-bottom:calc(calc(var(--nav-h) + 34px) + env(safe-area-inset-bottom));
}

.topbar{
  display:flex; align-items:flex-start; justify-content:space-between; gap:12px;
  padding:calc(16px + env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) 12px max(16px,env(safe-area-inset-left));
  position:sticky; top:0; z-index:5;
  background:rgba(251,246,237,.92); backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(234,220,201,.72);
}
.topbar>div:first-child{min-width:0; flex:1}
.topbar h1{font-size:var(--fs-2xl); letter-spacing:0; overflow-wrap:anywhere; margin-top:5px}
.eyebrow{font-size:var(--fs-xs); letter-spacing:.08em; color:var(--muted); font-weight:700}
.icon-button{
  width:44px; height:44px; flex:none; border:1px solid var(--line); border-radius:var(--radius-md);
  background:#fff; position:relative; font-size:22px; box-shadow:var(--shadow-card);
  display:grid; place-items:center;
}
.icon-button:active{transform:scale(.97); background:var(--neutral-2)}
.icon-button i{position:absolute; right:8px; top:7px; width:7px; height:7px; background:#ef6c58; border-radius:50%}
.guest-hint{
  flex:0 1 auto; max-width:150px; padding:10px 2px; color:var(--muted);
  font-size:11px; line-height:1.35; text-align:right; white-space:normal;
}

.main-content{
  padding:12px max(16px,env(safe-area-inset-right)) 24px max(16px,env(safe-area-inset-left));
}

/* ---------- 底部导航 ---------- */
.bottom-nav{
  position:fixed; left:0; right:0; bottom:0; margin:0 auto; z-index:10;
  width:100%; max-width:var(--maxw);
  height:calc(var(--nav-h) + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(255,255,255,.97); border-top:1px solid var(--line);
  display:flex; justify-content:space-around; align-items:center;
  box-shadow:0 -5px 18px rgba(120,90,60,.08);
}
.nav-item{
  position:relative; flex:1; min-width:0; min-height:52px;
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:5px;
  color:var(--muted-2);
}
.nav-item .ui-icon{width:24px; height:24px}
.nav-item small{font-size:10px; line-height:1}
.nav-item.active{color:var(--blue); font-weight:700}
.nav-item.active .ui-icon{stroke-width:2}
.nav-item.active:after{content:""; position:absolute; bottom:1px; width:4px; height:4px; border-radius:50%; background:var(--blue)}
.nav-item:active{transform:scale(.97)}

/* 中间凸起的拍错题按钮 */
.capture-nav{color:#fff!important; margin-top:-22px}
.capture-nav span{
  width:50px; height:50px; border-radius:18px; background:var(--blue);
  display:grid; place-items:center; font-size:31px; line-height:1;
  box-shadow:0 8px 18px rgba(226,118,63,.36); border:4px solid var(--bg);
}
.capture-nav small{color:var(--blue); font-weight:700; margin-top:1px}
.camera-icon{position:relative; width:25px; height:18px; border:2px solid #fff; border-radius:5px; background:transparent!important; box-shadow:none!important}
.camera-icon:before{content:""; position:absolute; left:7px; top:3px; width:7px; height:7px; border:2px solid #fff; border-radius:50%}
.camera-icon:after{content:""; position:absolute; left:4px; top:-5px; width:8px; height:5px; border:2px solid #fff; border-bottom:0; border-radius:3px 3px 0 0}

/* ---------- 4. 通用组件 ---------- */
.primary-button,.secondary-button{
  min-height:46px; border-radius:var(--radius-md); padding:11px 16px;
  font-weight:700; font-size:var(--fs-md); line-height:1.3;
  display:inline-flex; align-items:center; justify-content:center; gap:6px;
  transition:transform .16s,filter .16s,box-shadow .16s;
}
.primary-button{background:var(--blue); color:#fff; border-radius:12px 16px 12px 16px; box-shadow:0 4px 0 rgba(190,120,70,.20),0 8px 18px rgba(226,118,63,.22)}
.primary-button:active{transform:scale(.97); filter:brightness(.94)}
.secondary-button{background:var(--neutral-2); color:var(--neutral-6)}
.secondary-button:active{transform:scale(.97); filter:brightness(.94)}
.ghost-button{min-height:44px; border-radius:var(--radius-md); padding:11px 16px; color:var(--blue); font-size:var(--fs-md); font-weight:700}
.danger-button{background:var(--danger); color:#fff; min-height:44px; border-radius:var(--radius-md); padding:11px 16px; font-size:var(--fs-md); font-weight:700}
.text-button{
  color:var(--blue); font-weight:700; font-size:var(--fs-sm);
  min-height:32px; padding:7px 2px; display:inline-flex; align-items:center; gap:3px;
}
.text-button .ui-icon{display:inline-block; vertical-align:-7px; margin-right:3px}
.text-button:active{opacity:.68}

.card,.stat-card{background:var(--card); border:1px solid var(--line); border-radius:16px 20px 14px 22px; box-shadow:var(--shadow-card)}
.card:active,.lesson-card:active,.list-card:active,.review-card:active{transform:scale(.995)}

.section-head{display:flex; justify-content:space-between; align-items:center; gap:8px; margin:26px 2px 12px; min-height:24px}
.section-head h2{font-size:var(--fs-lg)}
.section-note{font-size:11px; color:var(--muted)}

.tag{background:var(--neutral-2); color:var(--neutral-6); padding:5px 8px; border-radius:var(--radius-sm); font-size:var(--fs-xs); line-height:1.3; display:inline-block}
.tag.blue{background:var(--blue-soft); color:var(--blue)}
.tag.green,.tag-success{background:var(--success-soft); color:var(--green)}
.orange-tag{background:var(--warning-soft); color:var(--orange-deep)}
.tag-row{display:flex; flex-wrap:wrap; gap:7px}

.list-card{padding:3px 16px}
.list-row{display:flex; justify-content:space-between; align-items:center; gap:10px; padding:16px 0; border-bottom:1px solid rgba(234,220,201,.72); min-height:68px}
.list-row:last-child{border-bottom:0}
.list-row strong{font-size:14px; line-height:1.4; display:block}
.list-row p{margin-top:4px; color:var(--muted); font-size:var(--fs-xs); line-height:1.55}

.empty-state{display:grid; justify-items:center; gap:4px; padding:32px 20px; min-height:176px; text-align:center}
.empty-state .empty-icon,.state-icon{width:48px; height:48px; border-radius:50%; display:grid; place-items:center; background:var(--blue-soft); color:var(--blue); margin-bottom:6px}
.empty-state .state-icon{width:22px; height:22px; stroke:currentColor; fill:none; stroke-width:1.8; stroke-linecap:round}
.empty-state h3{font-size:var(--fs-body); margin:0}
.empty-state p{max-width:270px; color:var(--muted); font-size:var(--fs-md); line-height:1.7; margin:0}
.empty-action{margin-top:10px; min-width:132px}
.error-state{display:grid; justify-items:center; text-align:center; padding:30px 20px; min-height:190px}
.error-state .error-icon{width:44px; height:44px; border-radius:50%; display:grid; place-items:center; background:var(--danger-soft); color:var(--danger); font-weight:800; font-size:20px}
.error-state h3{margin-top:2px; font-size:var(--fs-body)}
.error-state p{max-width:270px; color:var(--muted); font-size:var(--fs-md); line-height:1.65; margin:0}
.error-state .secondary-button{margin-top:8px; min-width:100px}

.mistake-image{display:block; width:100%; max-height:260px; object-fit:contain; margin:12px 0; border-radius:12px; background:var(--neutral-1)}

/* ---------- 5. 首页 ---------- */
.workspace-hero{
  position:relative; overflow:hidden; padding:20px; border-radius:var(--radius-2xl); color:#fff;
  background:linear-gradient(135deg,#b8502a 0%,#e2763f 55%,#f2b06a 100%); box-shadow:var(--shadow-float);
}
.workspace-hero:after{content:""; position:absolute; width:170px; height:170px; right:-58px; top:-86px; border:1px solid rgba(255,255,255,.2); border-radius:50%; box-shadow:0 0 0 18px rgba(255,255,255,.05),0 0 0 38px rgba(255,255,255,.03)}
.workspace-hero-top{position:relative; z-index:1; display:flex; align-items:flex-start; justify-content:space-between; gap:12px}
.workspace-hero h2{margin:8px 0 6px; font-size:22px; line-height:1.35}
.workspace-hero p{position:relative; z-index:1; margin:0; color:#ffe9d4; font-size:13px; line-height:1.65}
.hero-status{position:relative; z-index:1; display:inline-flex; align-items:center; gap:5px; white-space:nowrap; padding:6px 9px; border:1px solid rgba(255,255,255,.2); border-radius:999px; background:rgba(255,255,255,.14); font-size:10px}
.hero-status i{width:6px; height:6px; border-radius:50%; background:#7de0b1}
.hero-pills{position:relative; z-index:1; display:flex; gap:7px; margin-top:17px; flex-wrap:wrap}
.hero-pills span{padding:6px 9px; border-radius:999px; background:rgba(255,255,255,.15); font-size:10px}
.workspace-progress{position:relative; z-index:1; margin-top:18px; padding:12px 13px; border:1px solid rgba(255,255,255,.18); border-radius:14px; background:rgba(90,45,20,.16); display:grid; grid-template-columns:auto 1fr; gap:2px 12px; align-items:end}
.workspace-progress>div:first-child strong{font-size:26px; line-height:1}
.workspace-progress>div:first-child span{display:block; font-size:10px; color:#ffe4c8; margin-top:4px}
.progress-track{height:8px; align-self:center; background:rgba(255,255,255,.2); border-radius:99px; overflow:hidden}
.progress-track span{display:block; height:100%; border-radius:99px; background:#8bdcb5}
.workspace-progress-meta{grid-column:1/-1; display:flex; justify-content:space-between; color:#ffe4c8; font-size:10px}
.workspace-progress-meta b{color:#fff}

.home-section{margin-top:24px}
.home-section-head{margin:0 2px 11px}
.feature-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
.feature-tile{min-width:0; min-height:138px; padding:20px 16px 18px; border:2px solid var(--line); border-radius:22px 26px 18px 28px; background:var(--card); display:flex; flex-direction:column; align-items:center; justify-content:center; gap:9px; text-align:center; box-shadow:var(--shadow-card); transition:transform .16s,box-shadow .16s,border-color .16s}
.feature-tile:active{transform:scale(.96) rotate(-.6deg)}
.feature-icon{width:50px; height:50px; border-radius:17px; display:grid; place-items:center}
.feature-icon .ui-icon{width:26px; height:26px}
.feature-tile strong{font-size:14px; line-height:1.3}
.feature-tile small{min-height:17px; color:var(--muted); font-size:11px; line-height:1.4}
.feature-blue{background:#fdeadd}.feature-blue .feature-icon{color:#c45925; background:#fbdcc0}
.feature-orange{background:#fdeed8}.feature-orange .feature-icon{color:#b96a24; background:#fadfae}
.feature-green{background:#e4f4e9}.feature-green .feature-icon{color:#2f7d57; background:#cdecd9}
.feature-purple{background:#f0eafb}.feature-purple .feature-icon{color:#6f54b8; background:#e2d7f7}

.home-review-card{display:flex; align-items:center; gap:11px; padding:15px; border-left:4px solid var(--orange); background:linear-gradient(135deg,#fdf4e3,#fffdf7)}
.home-review-icon{width:38px; height:38px; flex:none; display:grid; place-items:center; border-radius:12px; background:#fbe4c6; color:var(--orange)}
.home-review-icon .ui-icon{width:21px; height:21px}
.home-review-copy{min-width:0; flex:1}
.home-review-copy h3{margin:6px 0 3px; font-size:14px}
.home-review-copy p{margin:0; color:var(--muted); font-size:11px; line-height:1.5}
.home-review-button{flex:none; width:72px; min-height:40px; padding:8px 5px; font-size:11px}

.home-member-strip{display:flex; align-items:center; justify-content:space-between; gap:12px; margin:24px 0 6px; padding:14px 15px; border:1px solid #f0d9bd; border-radius:16px; background:#fdf0e2}
.home-member-strip strong{font-size:13px; display:block}
.home-member-strip p{margin-top:3px; color:var(--muted); font-size:10px}
.home-member-strip .ghost-button,.home-member-strip .primary-button{flex:none; min-height:38px; padding:8px 11px; font-size:11px}

/* ---------- 6. 学习记录 ---------- */
.lesson-card{position:relative; padding:16px 16px 16px 20px; margin-bottom:12px; cursor:pointer}
.lesson-card:before{content:""; position:absolute; left:0; top:16px; bottom:16px; width:4px; border-radius:0 4px 4px 0; background:var(--blue)}
.lesson-card:nth-of-type(odd):before{background:var(--green)}
.lesson-card:after{content:"›"; position:absolute; right:16px; bottom:16px; color:#b6a58e; font-size:22px}
.lesson-top{display:flex; justify-content:space-between; gap:10px}
.lesson-top strong{font-size:15px; line-height:1.4}
.lesson-top span{color:var(--muted); font-size:11px; white-space:nowrap; padding:4px 7px; border-radius:7px; background:var(--neutral-2)}
.lesson-card p{font-size:var(--fs-md); line-height:1.7; margin:10px 0; color:#6d5a45}
.lesson-card .text-button{padding-right:26px}

.mistake-card{padding:16px; margin-bottom:12px}
.mistake-card .lesson-top strong{font-size:14px}
.mistake-card p{margin:6px 0; color:var(--muted); font-size:12px}
.mistake-card small{display:block; color:var(--muted); font-size:11px; margin-bottom:8px}
.mistake-filters{display:grid; grid-template-columns:1fr 1fr 1fr; gap:8px; margin-bottom:14px}
.mistake-filters select,.mistake-filters input{min-height:44px; width:100%}

/* 错题库筛选面板：卡片化 chip 选择，替代原生下拉框 */
.mistake-filter-panel{padding:16px 16px 14px; margin-bottom:16px; background:linear-gradient(180deg,#fffdf8,#fdf7ec); border:2px solid var(--line); border-radius:16px 20px 14px 22px; box-shadow:var(--shadow-card)}
.mistake-filter-head{display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:13px}
.mistake-filter-group{margin-bottom:13px}
.mistake-filter-group:last-child{margin-bottom:0}
.mistake-filter-label{display:block; font-size:12px; font-weight:800; color:var(--muted); margin-bottom:8px}
.mistake-chip-row{display:flex; flex-wrap:wrap; gap:8px}
.mistake-chip{min-height:36px; padding:7px 14px; border:1.5px solid var(--line); border-radius:999px; background:#fff; color:#7a6a56; font-size:13px; font-weight:700; line-height:1.3; transition:transform .15s,border-color .15s,background .15s,color .15s}
.mistake-chip:active{transform:scale(.96)}
.mistake-chip.active{border-color:var(--blue); background:var(--blue-soft); color:var(--blue-deep)}
.mistake-search{position:relative; display:flex; align-items:center}
.mistake-search .ui-icon{position:absolute; left:13px; width:18px; height:18px; color:var(--muted-2); pointer-events:none}
.mistake-search input{width:100%; min-height:46px; padding:11px 13px 11px 40px; border:1.5px solid var(--line); border-radius:12px; background:#fff; color:var(--ink)}
.mistake-search input:focus{outline:none; border-color:var(--blue); box-shadow:0 0 0 3px var(--blue-soft)}

.review-card{position:relative; overflow:hidden; padding:17px; border-left:4px solid var(--orange); background:linear-gradient(135deg,#fdf4e3,#fffdf7)}
.review-card h3{font-size:15px; margin-bottom:7px}
.review-card p{color:#7a6a56; font-size:12px; line-height:1.5; margin:0}
.review-card .review-actions{position:relative; z-index:1; display:flex; gap:8px; margin-top:13px; margin-right:64px}
.review-frequency-setting{display:flex; align-items:center; gap:8px; flex-wrap:wrap; margin:10px 0 4px; font-size:12px; color:var(--muted)}
.review-frequency-setting select,.review-frequency-setting input{min-height:40px; font-size:13px}
.review-frequency-setting .text-button{min-height:40px}

.student-switch{margin:4px 0 14px; padding:12px 14px; background:#fff; border:1px solid var(--line); border-radius:var(--radius-lg); box-shadow:var(--shadow-card)}
.student-switch label{display:grid; gap:6px; font-weight:700; color:var(--muted); font-size:12px}
.student-switch select{min-height:40px; font-size:13px}

.lesson-detail .detail-list{margin:12px 0 0; display:grid; gap:10px}
.lesson-detail .detail-list>div{display:grid; gap:2px}
.lesson-detail .detail-list dt{font-size:11px; color:var(--muted); font-weight:700}
.lesson-detail .detail-list dd{margin:0; font-size:13px; line-height:1.6; color:#6d5a45}
.comment-form{display:block; margin-top:16px; font-size:12px; color:var(--muted)}
.comment-form textarea{width:100%; margin-top:6px}

/* ---------- 7. 成绩 ---------- */
.grade-card{padding:17px; margin-bottom:14px; background:linear-gradient(180deg,#fffcf5,#fdf8ef)}
.grade-row{display:flex; justify-content:space-between; align-items:flex-end}
.grade-row strong{font-size:30px; line-height:1.1}
.grade-row span{font-size:12px; color:var(--green); font-weight:700}
.grade-row>div:first-child .eyebrow{font-size:11px}
.chart{height:160px; display:flex; align-items:flex-end; gap:18px; padding:30px 12px 34px}
.bar{flex:1; background:#f0e3cd; border-radius:9px 9px 3px 3px; position:relative; min-height:28px; transition:height .25s ease,background .2s}
.bar.active{background:linear-gradient(180deg,#4fb89e,#2f8a72); box-shadow:0 7px 13px rgba(47,138,114,.22)}
.bar em{position:absolute; top:-22px; left:50%; transform:translateX(-50%); font-style:normal; font-size:var(--fs-sm); font-weight:800; color:var(--ink)}
.bar small{position:absolute; bottom:-22px; left:50%; transform:translateX(-50%); font-size:var(--fs-xs); color:var(--muted)}
.code-row{display:grid; grid-template-columns:1fr 1fr; gap:10px}
.grade-row-item{flex-wrap:wrap}
.grade-row-item .text-button{min-height:36px}

/* 成绩录入卡片：与整体手绘暖色风格一致，字段间距充足 */
.grade-form-card{padding:18px 18px 16px; margin-bottom:14px; background:linear-gradient(180deg,#fffdf8,#fdf7ec); border-width:2px}
.grade-form-head{display:flex; align-items:flex-start; justify-content:space-between; gap:12px; margin-bottom:16px}
.grade-form-head h3{font-size:19px; margin-top:5px}
.grade-form-close{width:36px; height:36px; flex:none; border-radius:12px; background:var(--neutral-2); color:var(--muted); font-size:24px; line-height:1; display:grid; place-items:center}
.grade-form-close:active{background:var(--neutral-3)}
.grade-form-grid{display:grid; grid-template-columns:1fr 1fr; gap:14px}
.field{display:grid; gap:7px; min-width:0}
.field>span{font-size:12px; color:var(--muted); font-weight:700}
.field input,.field textarea{width:100%; min-height:46px; padding:11px 13px; border:1px solid var(--line); border-radius:12px; background:#fff; color:var(--ink)}
.field textarea{min-height:76px; resize:vertical}
.field input:focus,.field textarea:focus{outline:none; border-color:var(--blue); box-shadow:0 0 0 3px var(--blue-soft)}
.field-span{grid-column:1/-1}
.score-pair{display:flex; align-items:center; gap:10px}
.score-field{flex:1; min-width:0; display:grid; gap:5px; text-align:center}
.score-field input{text-align:center; font-size:22px; font-weight:800; font-variant-numeric:tabular-nums}
.score-field small{font-size:11px; color:var(--muted-2)}
.score-divider{font-size:22px; font-weight:800; color:var(--muted-2); padding-top:6px}
.grade-form-actions{display:flex; gap:10px; margin-top:18px}
.grade-form-actions button{flex:1}
.grade-form-actions .secondary-button{background:#fff; border:1px solid var(--line); color:var(--muted)}
.grade-list{margin-bottom:14px}
.grade-member-strip{margin-top:14px}

/* ---------- 8. 资料 ---------- */
.material-card{display:flex; align-items:center; gap:11px; padding:14px 15px; margin-bottom:10px}
.material-icon{width:38px; height:38px; display:grid; place-items:center; border-radius:12px; background:var(--blue-soft); color:var(--blue); flex:none}
.material-icon .ui-icon{width:20px; height:20px}
.material-copy{min-width:0; flex:1}
.material-copy strong{display:block; font-size:13px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.material-copy p{margin:4px 0; color:var(--muted); font-size:11px}
.material-copy small{display:block; color:var(--muted-2); font-size:10px}
.material-actions{display:flex; flex:none; gap:6px; align-items:center}
.material-actions .ghost-button,.material-download{min-height:38px; padding:8px 11px; font-size:11px}
.material-note{display:block; color:var(--orange-deep); font-size:11px; line-height:1.5}
.material-lock-card{background:var(--blue-soft)}

/* ---------- 9. 复习确认 ---------- */
.confirmation-entry{margin-left:10px; color:var(--orange-deep)}
.confirmation-card{padding:16px; margin-bottom:10px}
.confirmation-card>p{margin:10px 0; color:#6d5a45; font-size:13px; line-height:1.55}
.confirmation-answer{padding:11px 12px; border-radius:var(--radius-md); background:var(--neutral-1); color:var(--ink); font-size:13px; line-height:1.55}
.confirmation-answer small{display:block; color:var(--muted); font-size:11px; margin-bottom:5px}
.confirmation-answer .mistake-image{max-height:180px}
.confirmation-note{width:100%; min-height:64px; margin:11px 0}

/* ---------- 10. 复习卷 ---------- */
.review-page-head{display:flex; justify-content:space-between; align-items:center; margin:4px 2px 14px}
.review-intro{background:var(--blue-soft); border-radius:18px; padding:18px; margin-bottom:16px}
.review-intro h2{font-size:21px; margin:7px 0}
.review-intro p{margin:0; color:#6d5a45; font-size:12px; line-height:1.6}
.review-question{position:relative; display:flex; gap:12px; padding:48px 16px 16px; margin-bottom:12px}
.review-question:before{content:"复习题目"; position:absolute; left:16px; top:16px; color:var(--blue); font-size:var(--fs-sm); font-weight:800}
.question-number{position:absolute; right:16px; top:14px; padding:5px 9px; border-radius:var(--radius-sm); font-size:var(--fs-xs); background:var(--blue-soft); color:var(--blue); font-weight:800}
.question-body{flex:1; min-width:0}
.question-meta{display:flex; gap:6px; flex-wrap:wrap}
.question-meta span{font-size:10px; background:var(--neutral-2); color:#8b7b68; border-radius:7px; padding:4px 7px}
.question-body h3{font-size:15px; line-height:1.55; margin:11px 0 8px}
.question-reason{font-size:11px; color:#9a8973; line-height:1.5; margin:0 0 12px}
.question-body label{font-size:11px; color:#7a6a56; font-weight:700}
.attempt-answer,.attempt-image{display:block; width:100%; min-height:72px; margin-top:6px; border:1px solid var(--line); border-radius:10px; padding:10px; font:inherit; font-size:13px; resize:vertical}
.attempt-image{min-height:auto; padding:8px}
.result-choice{display:flex; gap:10px; margin:12px 0}
.result-choice button{flex:1; border:1px solid var(--line); border-radius:10px; padding:9px 5px; font-size:var(--fs-md); font-weight:700; background:#fff; color:#7a6a56}
.result-choice button.selected{border:2px solid var(--blue); color:var(--blue); background:var(--blue-soft)}
.attempt-status{font-size:11px; margin:8px 0 0}
.attempt-status.success{padding:10px 12px; border-radius:var(--radius-md); background:var(--success-soft); font-weight:700; color:var(--green)}
.attempt-status.error{padding:10px 12px; border-radius:var(--radius-md); background:var(--danger-soft); font-weight:700; color:var(--danger)}
.review-question.completed{border-color:#8ed4b7; background:#fbfffd}

/* ---------- 11. 报告 / 审计 / 老师工作台 ---------- */
.report-actions{padding:16px; display:grid; gap:12px}
.report-actions>div:first-child strong{font-size:14px}
.report-actions>div:first-child p{color:var(--muted); font-size:12px; margin-top:4px}
.report-actions>div:last-child{display:flex; gap:8px}
.report-list .list-row strong{font-size:13px}
.report-list .list-row p{margin-top:6px}

.teacher-form{padding:16px; display:grid; gap:12px; margin-bottom:14px}
.teacher-form label{display:grid; gap:6px; font-size:12px; color:var(--muted)}
.teacher-student-list{display:grid; gap:8px; margin-bottom:16px}
.teacher-student-card{padding:14px 15px; text-align:left; display:flex; flex-direction:column; gap:4px}
.teacher-student-card.selected{border:2px solid var(--blue); background:var(--blue-soft)}
.teacher-student-card strong{font-size:14px}
.teacher-student-card span{font-size:11px; color:var(--muted)}
.invite-card{padding:16px; display:grid; gap:6px; margin-bottom:12px}
.invite-card strong{font-size:18px; letter-spacing:.05em}
.invite-card span{font-size:11px; color:var(--muted)}
.inline-status{min-height:18px; margin:0; font-size:12px}
.inline-status.success{color:var(--green)}
.inline-status.error{color:var(--danger)}

/* ---------- 12. 个人页 ---------- */
.profile-card{display:flex; align-items:center; gap:12px; padding:20px; border-radius:var(--radius-2xl); background:linear-gradient(135deg,#fdeee0,#fffdf7); border:1px solid #f0d9bd; box-shadow:var(--shadow-card)}
.profile-avatar{width:52px; height:52px; flex:none; display:grid; place-items:center; border-radius:18px; background:var(--blue); color:#fff; font-size:23px; font-weight:800}
.profile-intro{min-width:0; flex:1}
.profile-intro h2{margin:5px 0 2px; font-size:20px}
.profile-intro p{margin:0; color:var(--muted); font-size:12px}
.profile-state{align-self:flex-start; padding:5px 8px; border-radius:999px; background:var(--success-soft); color:var(--green); font-size:10px}
.profile-group{margin-top:22px}
.profile-group-title{margin:0 2px 9px; color:var(--muted); font-size:12px; font-weight:800}
.profile-list{overflow:hidden; border:1px solid var(--line); border-radius:var(--radius-lg); background:#fff; box-shadow:var(--shadow-card)}
.profile-row{width:100%; min-height:70px; padding:13px 15px; display:flex; align-items:center; gap:11px; text-align:left; border-bottom:1px solid rgba(234,220,201,.72); background:#fff}
.profile-row:last-child{border-bottom:0}
.profile-row-icon{width:34px; height:34px; flex:none; display:grid; place-items:center; border-radius:11px; background:var(--blue-soft); color:var(--blue); font-size:20px}
.profile-row-icon .ui-icon{width:19px; height:19px}
.profile-row>div{min-width:0; flex:1}
.profile-row strong{display:block; font-size:14px}
.profile-row small{display:block; margin-top:3px; color:var(--muted); font-size:11px; line-height:1.4}
.profile-row select{min-height:36px; margin-top:6px; font-size:12px; width:100%}
.notification-frequency-row{align-items:center}
.notification-frequency-copy{min-width:0; flex:1}
.notification-frequency-row select{
  width:136px; flex:0 0 136px; min-height:40px; margin-top:0;
  padding:0 30px 0 10px; border:1px solid var(--line); border-radius:10px;
  background:var(--neutral-1); color:var(--ink); font-weight:700;
}
.profile-action-row{cursor:pointer}
.profile-action-row:active{background:var(--neutral-1)}
.profile-arrow{color:#b6a58e; font-size:22px; line-height:1}
.profile-teacher-row{align-items:flex-start}
.profile-teacher-row input{display:block; width:100%; min-height:36px; margin-top:7px; font-size:12px}
.profile-teacher-row .ghost-button,.remove-teacher{flex:none; min-height:38px; padding:8px 10px; font-size:11px}
.profile-logout{color:var(--danger)}
.profile-logout .profile-row-icon{background:var(--danger-soft); color:var(--danger)}

@media(max-width:390px){
  .notification-frequency-row{flex-wrap:wrap; align-items:flex-start}
  .notification-frequency-row select{width:calc(100% - 45px); flex-basis:calc(100% - 45px); margin-left:45px}
}

.add-child-card{padding:18px; margin-top:12px}
.add-child-card h3{margin:7px 0 14px; font-size:17px}
.child-form{display:grid; gap:12px}
.child-form label{display:grid; gap:6px; font-size:12px; color:var(--muted)}

.membership-reminder{display:grid; grid-template-columns:1fr auto; gap:4px 12px; align-items:center; margin:12px 0; padding:13px 15px; border:1px solid #f1cf9f; border-radius:var(--radius-lg); background:var(--warning-soft)}
.membership-reminder strong{font-size:13px; color:var(--orange-deep)}
.membership-reminder span{font-size:11px; color:var(--muted)}
.membership-reminder .text-button{grid-column:2; grid-row:1/3}
.membership-reminder.expired{border-color:#efc7ca; background:var(--danger-soft)}
.membership-reminder.expired strong{color:var(--danger-deep)}

/* ---------- 13. 弹层（底部抽屉） ---------- */
.sheet-backdrop{position:fixed; inset:0; background:rgba(15,22,35,.4); opacity:0; pointer-events:none; transition:opacity .25s; z-index:60}
.sheet-backdrop.open{opacity:1; pointer-events:auto}
.bottom-sheet{
  position:fixed; left:0; right:0; bottom:0; margin:0 auto; z-index:61;
  width:100%; max-width:var(--maxw); background:#fff;
  border-radius:24px 24px 0 0; padding:26px 20px calc(22px + env(safe-area-inset-bottom));
  box-shadow:0 -10px 30px rgba(120,90,60,.16);
  transform:translateY(100%); transition:transform .28s cubic-bezier(.22,1,.36,1);
  padding-left:max(20px,env(safe-area-inset-left)); padding-right:max(20px,env(safe-area-inset-right));
  max-height:90dvh; overflow:auto;
}
.bottom-sheet.open{transform:translateY(0)}
.sheet-close{position:absolute; right:18px; top:14px; z-index:4; width:44px; height:44px; display:grid; place-items:center; border-radius:var(--radius-md); font-size:26px; color:#8c7a67}
.sheet-close .ui-icon{width:22px; height:22px}
.bottom-sheet h2{font-size:23px; margin:8px 40px 7px 0}
.sheet-lead{color:var(--muted); font-size:13px; line-height:1.6; margin:0 0 18px}
.fine-print{font-size:10px; color:var(--muted-2); text-align:center; margin:12px 0 0}

.plan-list{display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin-bottom:14px}
.plan{position:relative; min-height:108px; border:1px solid var(--line); border-radius:var(--radius-lg); padding:14px 10px; text-align:left; display:flex; flex-direction:column; gap:5px}
.plan strong{font-size:13px}
.plan span{font-size:17px; font-weight:800}
.plan em{font-size:var(--fs-xs); color:var(--muted); font-style:normal}
.plan:nth-child(2):before{content:"推荐"; position:absolute; right:7px; top:-9px; padding:3px 7px; border-radius:6px; background:var(--orange); color:#fff; font-size:10px; font-weight:800}
.plan.selected{border:2px solid var(--blue); padding:13px 9px; background:var(--blue-soft)}
.plan.selected:after{content:"✓"; position:absolute; right:9px; bottom:9px; color:var(--blue); font-weight:900}

.membership-wall{max-height:min(82vh,660px)}
.membership-wall-preview{display:grid; gap:8px; margin:16px 0; padding:12px; border:1px solid var(--line); border-radius:var(--radius-md); background:var(--neutral-1)}
.membership-preview-row{display:grid; gap:4px; padding:10px; border-radius:var(--radius-sm); background:#fff}
.membership-preview-row strong{font-size:13px}
.membership-preview-row span{color:var(--muted); font-size:11px; line-height:1.45; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.membership-preview-count{display:flex; align-items:baseline; justify-content:center; gap:8px; padding:14px; text-align:center}
.membership-preview-count strong{font-size:28px; color:var(--blue)}
.membership-preview-count span{color:var(--muted); font-size:12px}
.membership-wall-actions{display:flex; gap:10px}
.membership-wall-actions button{flex:1 1 0; min-width:0; padding-left:8px; padding-right:8px}

/* 拍照弹层 */
.capture-sheet{padding-top:70px}
.camera-stage{height:260px; margin:0 -20px 14px; background:#182230; position:relative; overflow:hidden}
.camera-guide{position:absolute; inset:72px 34px 54px; border:1px solid rgba(255,255,255,.7); border-radius:10px}
.camera-guide:before,.camera-guide:after,.camera-guide span:before,.camera-guide span:after{content:""; position:absolute; width:26px; height:26px; border-color:#fff; border-style:solid}
.camera-guide:before{left:-2px; top:-2px; border-width:3px 0 0 3px}
.camera-guide:after{right:-2px; top:-2px; border-width:3px 3px 0 0}
.camera-guide span:before{left:-2px; bottom:-2px; border-width:0 0 3px 3px}
.camera-guide span:after{right:-2px; bottom:-2px; border-width:0 3px 3px 0}
.shutter-button{position:absolute; left:50%; bottom:14px; transform:translateX(-50%); width:66px; height:66px; border:4px solid #fff; border-radius:50%; display:grid; place-items:center; z-index:2}
.shutter-button span{width:52px; height:52px; background:#fff; border-radius:50%; display:block}
.album-button{position:absolute; right:16px; bottom:16px; width:52px; height:52px; border-radius:16px; background:rgba(255,255,255,.92); color:#182230; display:flex; flex-direction:column; align-items:center; justify-content:center; font-size:24px; z-index:2}
.album-button small{font-size:9px; margin-top:-2px}
.capture-steps{display:flex; align-items:center; gap:6px; margin:4px 0 16px; color:var(--muted-2); font-size:10px}
.capture-steps span{white-space:nowrap}
.capture-steps span.current{color:var(--blue); font-weight:700}
.capture-steps i{height:1px; background:#e6dac8; flex:1}
.recognition-form{display:grid; gap:12px}
.recognition-form label{display:grid; gap:6px; font-size:12px; color:var(--muted)}

/* ---------- 14. 通知面板 ---------- */
.notification-panel{
  position:fixed; top:calc(72px + env(safe-area-inset-top)); z-index:70;
  right:max(12px,calc((100vw - var(--maxw))/2 + 12px));
  width:min(360px,calc(100vw - 24px)); max-height:62vh; overflow:auto;
  background:#fff; border:1px solid var(--line); border-radius:var(--radius-xl); box-shadow:var(--shadow-layer);
  opacity:0; transform:translateY(-8px); pointer-events:none; transition:.2s;
}
.notification-panel.open{opacity:1; transform:translateY(0); pointer-events:auto}
.notification-panel header{display:flex; justify-content:space-between; align-items:center; padding:15px; border-bottom:1px solid var(--line)}
.notification-panel header strong{font-size:16px}
.notification-panel header button{font-size:11px; color:var(--blue); font-weight:700; min-height:32px}
.notification-item{display:flex; gap:10px; padding:14px 15px; border-bottom:1px solid #f0e7d8; text-align:left; width:100%; align-items:flex-start}
.notification-item.unread{background:#fdf3e6}
.notification-type{width:30px; height:30px; flex:none; border-radius:10px; background:var(--blue-soft); color:var(--blue); display:grid; place-items:center; font-size:13px}
.notification-body{flex:1; min-width:0; word-break:break-word}
.notification-item strong{display:block; font-size:13px}
.notification-item p{font-size:12px; line-height:1.5; color:var(--muted); margin:4px 0; word-break:break-word}
.notification-item time{font-size:10px; color:#b6a58e}
.notification-empty{padding:30px 15px; text-align:center; color:var(--muted); font-size:12px}

/* ---------- 15. AI 助手 ---------- */
.assistant-fab{
  position:fixed; z-index:12;
  right:max(16px,calc((100vw - var(--maxw))/2 + 16px));
  bottom:calc(calc(var(--nav-h) + 24px) + env(safe-area-inset-bottom));
  width:56px; height:56px; border-radius:20px; background:var(--pink); color:#fff;
  box-shadow:0 10px 24px rgba(224,118,143,.32);
  display:flex; flex-direction:column; align-items:center; justify-content:center;
}
.assistant-fab .ui-icon{width:26px; height:26px}
.assistant-fab small{font-size:10px; margin-top:2px; line-height:1}
.assistant-fab:active{transform:scale(.97)}

.assistant-panel{
  position:fixed; z-index:71;
  right:max(8px,calc((100vw - var(--maxw))/2 + 8px));
  bottom:calc(calc(var(--nav-h) + 14px) + env(safe-area-inset-bottom));
  width:min(430px,calc(100vw - 16px)); height:min(680px,calc(100dvh - 104px));
  background:#fff; border-radius:28px; overflow:hidden;
  box-shadow:0 20px 55px rgba(20,35,62,.24);
  display:flex; flex-direction:column;
  opacity:0; transform:translateY(16px) scale(.96); pointer-events:none; transition:.22s;
}
.assistant-panel.open{opacity:1; transform:translateY(0) scale(1); pointer-events:auto}
.assistant-head{display:flex; align-items:center; gap:12px; padding:18px 20px 16px; border-bottom:1px solid #f0e7d8}
.assistant-avatar{width:42px; height:42px; flex:none; border-radius:15px; background:#fde3d3; color:#c45925; display:grid; place-items:center; font-size:23px}
.assistant-avatar .ui-icon{width:23px; height:23px}
.assistant-head>div{min-width:0; flex:1}
.assistant-head strong{display:block; font-size:16px}
.assistant-head small{display:block; color:var(--muted); font-size:11px; margin-top:4px}
.assistant-head button{width:40px; height:40px; flex:none; border-radius:12px; font-size:28px; color:#8c7a67; display:grid; place-items:center}
.assistant-head button .ui-icon{width:22px; height:22px}
.assistant-head button:active{background:var(--neutral-2)}
.assistant-messages{flex:1; overflow:auto; padding:20px 18px 22px; background:#faf5ec}
.assistant-bubble{max-width:91%; background:#fdeadd; color:#5a4636; border-radius:18px 18px 18px 6px; padding:14px 15px; font-size:14px; line-height:1.7; margin-bottom:16px; box-shadow:0 2px 8px rgba(90,60,30,.05)}
.assistant-bubble.user{margin-left:auto; background:var(--blue); color:#fff; border-radius:18px 18px 6px 18px; padding:13px 15px}
.assistant-suggestions{display:flex; flex-wrap:wrap; gap:9px; margin-top:4px}
.assistant-suggestions button{border:1px solid #f0d9bd; border-radius:13px; padding:10px 13px; font-size:12px; background:#fff; color:#c45925; min-height:40px; box-shadow:0 2px 5px rgba(226,118,63,.08)}
.assistant-suggestions button:active{background:var(--blue-soft)}
.assistant-input{display:flex; gap:10px; padding:13px 16px calc(13px + env(safe-area-inset-bottom)); background:#fff; border-top:1px solid #f0e7d8}
.assistant-input input{flex:1; min-width:0; height:46px; border:1px solid #eadcc9; border-radius:15px; padding:11px 14px; font-size:14px; background:#fdfaf4}
.assistant-input button{width:46px; height:46px; flex:none; border-radius:15px; background:var(--blue); color:#fff; font-size:21px; display:grid; place-items:center; box-shadow:0 5px 12px rgba(226,118,63,.28)}
.assistant-note{font-size:10px; color:var(--muted-2); text-align:center; margin:0; padding:0 16px 10px; background:#fff}

/* ---------- 16. 认证页 ---------- */
.auth-screen{
  min-height:100dvh; position:fixed; inset:0; z-index:90; overflow:auto;
  background:var(--bg); color:var(--ink);
  padding:calc(88px + env(safe-area-inset-top)) 24px calc(40px + env(safe-area-inset-bottom));
}
.auth-overlay{z-index:90}
.auth-back-button{position:absolute; left:16px; top:calc(14px + env(safe-area-inset-top)); display:inline-flex; align-items:center; gap:4px; min-width:76px; min-height:44px; padding:8px 10px; color:var(--ink); font-size:30px; line-height:1; border-radius:12px}
.auth-back-button span{font-size:13px; color:var(--muted); line-height:1}
.auth-back-button:active{background:var(--neutral-2)}
.auth-brand{margin:0 auto 24px; max-width:430px; text-align:center}
.auth-brand:before{content:"✦"; display:grid; place-items:center; width:52px; height:52px; margin:0 auto 14px; border-radius:17px; background:linear-gradient(135deg,var(--blue),#f2b06a); color:#fff; font-size:25px; box-shadow:0 10px 22px rgba(226,118,63,.25)}
.auth-brand h1{font-size:30px; font-weight:800; margin:12px 0 8px}
.auth-brand p{color:var(--muted); line-height:1.7}
.auth-form{background:#fff; border:1px solid var(--line); border-radius:18px; padding:20px; display:grid; gap:16px; box-shadow:0 10px 30px rgba(31,43,61,.06); margin:0 auto; max-width:430px}
.auth-form label{display:grid; gap:8px; font-size:13px; color:var(--muted)}
.auth-form input,.auth-form select{width:100%; padding:13px 14px; border:1px solid var(--line); border-radius:10px; font:inherit; color:var(--ink); background:#fff}
.auth-form .primary-button{width:100%; margin-top:4px}
.auth-status{min-height:18px; color:#b44747; font-size:13px}
.auth-register-link,.auth-close-link{font-size:13px; color:var(--blue); font-weight:700; text-align:center; min-height:44px; padding:10px; display:flex; align-items:center; justify-content:center; border-radius:var(--radius-md); background:var(--neutral-2)}
.auth-close-link{color:var(--muted); font-weight:500; background:transparent}

.auth-prompt{position:fixed; inset:0; z-index:80; background:rgba(15,22,35,.42); display:grid; place-items:center; padding:24px}
.auth-prompt-card{width:min(100%,390px); background:#fff; border-radius:18px; padding:24px; box-shadow:0 18px 50px rgba(15,22,35,.2)}
.auth-prompt-card h2{margin:8px 0; font-size:23px}
.auth-prompt-card p{color:var(--muted); font-size:13px; line-height:1.65; margin:0}
.auth-prompt-actions{display:flex; gap:10px; margin-top:20px}
.auth-prompt-actions .primary-button{width:100%}
.auth-prompt-cancel{display:block; width:100%; margin-top:14px; color:var(--muted); font-size:12px}

/* ---------- 17. 骨架屏 & 动效 ---------- */
.skeleton-stack{display:grid; gap:12px; padding-top:4px}
.skeleton-block{position:relative; overflow:hidden; background:linear-gradient(105deg,#f2e8d8 25%,#fbf5ea 42%,#f2e8d8 62%); background-size:240% 100%; animation:shimmer 1.25s ease-in-out infinite; border-radius:var(--radius-lg)}
.skeleton-hero{height:168px; border-radius:var(--radius-2xl)}
.skeleton-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:8px}
.skeleton-stat{height:92px}
.skeleton-card{height:108px}
@keyframes shimmer{0%{background-position:100% 0}100%{background-position:-100% 0}}

.page-enter{animation:page-enter 190ms ease-out both}
@keyframes page-enter{from{opacity:0; transform:translateY(8px)}to{opacity:1; transform:translateY(0)}}
@keyframes card-rise{from{opacity:0; transform:translateY(6px)}to{opacity:1; transform:translateY(0)}}

.button-loading{opacity:.72; pointer-events:none}
.button-loading::after{content:""; display:inline-block; width:12px; height:12px; margin-left:8px; border:2px solid currentColor; border-right-color:transparent; border-radius:50%; vertical-align:-2px; animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.handwriting-box{padding:10px; border:1px solid var(--line); border-radius:var(--radius-md); background:#fdfaf4}
.handwriting-head{display:flex; align-items:center; justify-content:space-between; margin-bottom:8px; color:var(--muted); font-size:12px}
.handwriting-head .ghost-button{min-height:32px; padding:6px 9px; font-size:11px}
.handwriting-box canvas{display:block; width:100%; height:180px; border-radius:10px; background:#fff; border:1px dashed #d8c6a8; touch-action:none}

/* ---------- 18. 大屏增强（仅 min-width，不影响手机） ---------- */
@media(min-width:700px){
  .app-shell{box-shadow:0 0 30px rgba(28,42,62,.08)}
}
@media(min-width:560px){
  .feature-grid{grid-template-columns:repeat(2,1fr); gap:16px}
}

/* ---------- 18b. 会员页 & 锁定卡片 ---------- */
.membership-hero{
  position:relative; overflow:hidden; padding:22px 20px; border-radius:var(--radius-2xl);
  color:#fff; background:linear-gradient(135deg,#b8502a 0%,#e2763f 55%,#f2b06a 100%);
  box-shadow:var(--shadow-float); margin-bottom:6px;
}
.membership-hero:after{content:""; position:absolute; width:180px; height:180px; right:-70px; top:-90px; border-radius:50%; background:radial-gradient(circle,rgba(255,255,255,.18),transparent 70%)}
.membership-hero .eyebrow{color:#ffe4c8}
.membership-hero h2{position:relative; z-index:1; font-size:22px; margin:8px 0}
.membership-hero p{position:relative; z-index:1; color:#ffe9d4; font-size:13px; line-height:1.65; margin:0}
.membership-hero .primary-button{position:relative; z-index:1; margin-top:16px; background:#fff; color:var(--blue)}

.locked-card{position:relative; padding:18px 18px 18px 20px; text-align:center}
.locked-card:before{content:"🔒"; position:absolute; right:14px; top:14px; font-size:15px; opacity:.5}
.locked-card h3{font-size:15px; padding-right:0; margin-bottom:8px}
.locked-card p{color:var(--muted); font-size:12px; line-height:1.6; margin:0 auto 14px; max-width:260px}
.locked-card .primary-button{min-width:180px; margin:4px auto 0; display:flex}

.notification-loading{display:grid; gap:10px; padding:16px 15px}
.notification-loading .skeleton-block{height:72px; border-radius:var(--radius-md)}

/* ---------- 18c. 角色选择 & 作业 ---------- */
.role-select{display:grid; grid-template-columns:1fr 1fr; gap:10px}
.role-option{cursor:pointer; min-width:0}
.role-option-card{display:flex; flex-direction:column; gap:5px; padding:14px 12px; border:2px solid var(--line); border-radius:var(--radius-lg); background:#fff; transition:border-color .15s,background .15s}
.role-option-card strong{font-size:14px}
.role-option-card small{color:var(--muted); font-size:11px; line-height:1.4}
.role-option.selected .role-option-card{border-color:var(--blue); background:var(--blue-soft)}
.role-option.selected .role-option-card strong{color:var(--blue)}

.homework-strip{background:#fdf0e2}
.homework-card{padding:16px; margin-bottom:12px}
.homework-home-card{padding:14px 16px; margin-bottom:12px}
.homework-home-card .homework-due{margin:6px 0 0}
.homework-home-note{margin-top:9px; padding:9px 11px; border-radius:var(--radius-md); background:var(--brand-soft); color:#6d5a45; font-size:12px; line-height:1.55}
.mistake-stats-card{padding:16px}
.mistake-stats-summary{display:flex; gap:12px; margin-bottom:14px}
.mistake-stats-summary>div{flex:1; padding:14px 12px; border-radius:var(--radius-md); background:var(--neutral-1); text-align:center}
.mistake-stats-summary strong{display:block; font-size:26px; line-height:1; font-variant-numeric:tabular-nums}
.mistake-stats-summary span{display:block; margin-top:6px; color:var(--muted); font-size:11px}
.mistake-stat-row{padding:10px 0; border-bottom:1px dashed var(--line)}
.mistake-stat-row:last-child{border-bottom:0; padding-bottom:0}
.mistake-stat-head{display:flex; justify-content:space-between; align-items:baseline; gap:8px; margin-bottom:7px}
.mistake-stat-head strong{font-size:13px}
.mistake-stat-head span{color:var(--muted); font-size:11px}
.mistake-stat-bar{height:8px; border-radius:99px; background:var(--neutral-2); overflow:hidden}
.mistake-stat-bar span{display:block; height:100%; border-radius:99px; background:linear-gradient(90deg,var(--green),#7bc79b)}
.homework-card>p{margin:10px 0; color:#6d5a45; font-size:13px; line-height:1.6}
.homework-due{display:inline-block; color:var(--orange-deep); font-size:11px; margin-bottom:8px}
.homework-meta{display:flex; gap:12px; color:var(--muted); font-size:11px; margin-bottom:10px}
.homework-submission{margin-top:10px}
.homework-feedback{margin-top:12px; padding:11px 12px; border-radius:var(--radius-md); background:var(--success-soft); font-size:13px; line-height:1.55}
.homework-feedback small{display:block; color:var(--green); font-size:11px; font-weight:700; margin-bottom:5px}
.homework-feedback-label{display:grid; gap:6px; font-size:12px; color:var(--muted); margin-top:12px}
.homework-feedback-label textarea,.homework-submit-input{width:100%; min-height:64px; margin-top:4px}
.homework-submit-image{display:block; margin-top:10px; font-size:12px}
.homework-review,.homework-submit{margin-top:10px}
.teacher-note{background:var(--brand-soft, #fce9d8); border-left:3px solid var(--brand, #e2763f)}
.comment-card{margin-bottom:10px}
.comment-reply{display:flex; gap:8px; align-items:flex-start; margin-top:10px; padding-top:10px; border-top:1px dashed var(--line, #eadcc9)}
.comment-reply textarea{flex:1; min-height:60px; padding:8px 10px; border:1px solid var(--line, #eadcc9); border-radius:8px; resize:vertical; font-family:inherit; font-size:13px}
.comment-reply textarea:focus{border-color:var(--brand, #e2763f); outline:none}
.comment-reply .ghost-button{flex-shrink:0; margin-top:0}

/* ---------- 18d. 光学对齐（光学对齐 ≠ 几何对齐） ----------
   几何居中（place-items / text-align）按包围盒对齐，
   但人眼感知的重心不同：数字、尖角字形、带字距的文本都需要微调补偿。 */

/* 数字统一等宽：成绩、数量、邀请码等纵向排列时，数字能真正上下对齐 */
.grade-row strong,
.workspace-progress strong,
.membership-preview-count strong,
.invite-card strong{
  font-variant-numeric:tabular-nums;
}

/* 大号展示数字：收紧行高，消除数字视觉上浮、与相邻元素错位 */
.grade-row strong{line-height:1}
.workspace-progress>div:first-child strong{line-height:1}

/* 尖角箭头 › 字形自带大量字面外留白，收紧行高避免视觉上下偏移 */
.lesson-card:after{line-height:1}

/* letter-spacing 会在末字后额外留白，用负 margin 补偿，
   让眉题（eyebrow）与左侧内容真正「贴边」对齐 */
.eyebrow{margin-right:-.08em}

/* 圆形元素的视觉补偿：等尺寸下圆形视觉面积比方形小，需略微放大或让内部图形收紧，
   否则与相邻方形容器「视觉不等大、不对齐」。 */
.notification-type{font-size:13px; line-height:1}
.hero-status i{flex:none}
.profile-avatar{line-height:1}

/* 底部导航：图标与文字是「图形+标签」的纵向组合，
   视觉重心应略上移，让图标真正落在文字正上方而非几何居中偏下 */
.nav-item{gap:6px}
.nav-item small{line-height:1; transform:translateY(-1px)}

/* ---------- 19. 无障碍 ---------- */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important; animation-iteration-count:1!important; scroll-behavior:auto!important; transition-duration:.01ms!important}
}