/* ===== 主题变量（由 JS applyTheme 覆盖）===== */
:root{
  --bg:#f1f5f9; --surface:#fff; --primary:#2563eb; --primary-soft:#dbeafe;
  --text:#0f172a; --muted:#64748b; --border:#e2e8f0; --card:#fff;
  --radius:12px; --shadow:0 1px 3px rgba(15,23,42,.08),0 8px 24px rgba(15,23,42,.06);
}
*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;background:var(--bg);color:var(--text);transition:background .35s ease,color .25s ease;line-height:1.65;}
a{color:inherit;} button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
::-webkit-scrollbar{width:9px;height:9px;} ::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px;}

/* ===== 布局 ===== */
#app{display:flex;min-height:100vh;}
.sidebar{width:230px;background:var(--surface);border-right:1px solid var(--border);padding:20px 14px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh;}
.brand{padding:6px 8px 18px;border-bottom:1px solid var(--border);margin-bottom:14px;}
.logo{font-size:20px;font-weight:800;color:var(--primary);letter-spacing:.5px;}
.brand-sub{font-size:11px;color:var(--muted);margin-top:2px;}
.nav{display:flex;flex-direction:column;gap:2px;flex:1;}
.nav-item{position:relative;display:flex;align-items:center;gap:11px;padding:11px 12px;border-radius:10px;color:var(--muted);font-weight:600;font-size:14px;transition:.18s;user-select:none;}
.nav-item:hover{background:var(--primary-soft);color:var(--text);}
.nav-item.active{background:var(--primary);color:#fff;}.nav-item.active::before{content:"";position:absolute;left:-14px;top:22%;bottom:22%;width:4px;border-radius:2px;background:var(--primary);}
.nav-ic{font-size:17px;}
.side-foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--border);}
.theme-label{font-size:12px;color:var(--muted);margin-bottom:8px;font-weight:600;}
.theme-panel{display:flex;gap:8px;flex-wrap:wrap;}
.theme-dot{width:30px;height:30px;border-radius:50%;border:3px solid var(--surface);box-shadow:0 0 0 1px var(--border);transition:.15s;cursor:pointer;}.theme-dot:hover{transform:scale(1.1);box-shadow:0 0 0 2px var(--primary);}
.theme-dot.active{transform:scale(1.18);box-shadow:0 0 0 2px var(--text);}
.foot-tip{font-size:11px;color:var(--muted);margin-top:12px;line-height:1.6;}

main{flex:1;min-width:0;height:100vh;overflow-y:auto;}
.view{padding:28px 34px 60px;display:none;animation:fade .3s ease;}
.view.active{display:block;}
@keyframes fade{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:none;}}

/* ===== 通用 ===== */
.btn{background:var(--primary-soft);color:var(--primary);padding:9px 16px;border-radius:9px;font-weight:600;font-size:13px;transition:.15s;}
.btn:hover{filter:brightness(.96);transform:translateY(-1px);}
.btn.primary{background:var(--primary);color:#fff;}
.btn.ghost{background:transparent;border:1px solid var(--border);color:var(--text);}
.btn.small{padding:6px 11px;font-size:12px;}
.btn.danger{background:transparent;border:1px solid #ef4444;color:#ef4444;}
.btn.danger:hover{background:#fef2f2;filter:none;}
.btn.big{padding:13px 20px;font-size:14px;flex:1;text-align:left;}
.panel{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);transition:box-shadow .18s,transform .18s;}
.panel:hover{box-shadow:0 2px 6px rgba(15,23,42,.1),0 10px 28px rgba(15,23,42,.08);}
.panel-h{font-weight:800;font-size:15px;margin-bottom:12px;color:var(--text);}
/* ===== 页面一级标题 ===== */
.page-head{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin:2px 0 18px;}
.page-title{font-size:23px;font-weight:900;letter-spacing:.3px;}
.page-desc{font-size:13px;color:var(--muted);}

/* ===== 作战室 ===== */
.hero{background:linear-gradient(120deg,var(--primary),var(--primary-soft));color:#fff;padding:26px 30px;border-radius:var(--radius);box-shadow:var(--shadow);}
.hero-title{font-size:26px;font-weight:900;}
.hero-title span{background:rgba(255,255,255,.2);padding:2px 12px;border-radius:8px;}
.hero-sub{margin-top:8px;font-size:13px;opacity:.92;}
.countdown{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:18px 0;}
.cd-card{background:var(--card);border:1px solid var(--border);border-top:4px solid var(--c);border-radius:var(--radius);padding:16px 14px 18px;text-align:center;box-shadow:var(--shadow);transition:.2s;}
.cd-card:hover{transform:translateY(-3px);}
.cd-label{font-size:13px;font-weight:700;color:var(--text);}
.cd-date{font-size:12px;color:var(--muted);margin:4px 0;}
.cd-num{font-size:32px;font-weight:900;color:var(--c);line-height:1;}
.cd-unit{font-size:12px;color:var(--muted);}
.home-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:18px;}
.time-table{list-style:none;}
.time-table li{display:flex;gap:14px;padding:9px 4px;border-bottom:1px dashed var(--border);font-size:13px;}
.time-table li b{color:var(--primary);min-width:108px;}
.time-table li span{color:var(--muted);}
.quick-btns{display:flex;flex-direction:column;gap:10px;}
.week-list{list-style:none;}
.week-list li{font-size:13px;padding:6px 0 6px 20px;position:relative;color:var(--text);}
.week-list li::before{content:"▸";position:absolute;left:2px;color:var(--primary);}
.rule{margin-top:18px;}
.rule-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;}
.rule-grid div{background:var(--primary-soft);padding:12px 14px;border-radius:10px;font-size:13px;}

/* ===== 学习 ===== */
.learn-header{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;margin-bottom:16px;box-shadow:var(--shadow);}
.learn-title{display:flex;align-items:center;gap:12px;font-size:19px;font-weight:900;}
.subj-icon{width:36px;height:36px;border-radius:9px;color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:900;}
.teacher-bar{margin-top:14px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px;}
.teacher-bar select{background:var(--surface);border:1px solid var(--border);color:var(--text);padding:7px 12px;border-radius:8px;font-weight:600;}
.teacher-desc{color:var(--muted);font-size:12px;}
.chapter-list{display:flex;flex-direction:column;gap:12px;}
.chapter-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);}
.chapter-head{display:flex;align-items:center;gap:14px;padding:15px 18px;cursor:pointer;user-select:none;}
.chapter-idx{width:30px;height:30px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px;}
.chapter-title{flex:1;font-weight:700;font-size:14px;}
.chapter-prog{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);min-width:130px;}
.chapter-prog .bar{width:90px;height:7px;background:var(--border);border-radius:4px;overflow:hidden;}
.chapter-prog .bar i{display:block;height:100%;background:var(--primary);border-radius:4px;}
.chapter-body{padding:0 20px 20px;border-top:1px solid var(--border);}
.notes{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0;}
.note-block{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:12px 14px;}
.note-block.warn{border-left:4px solid #ef4444;}
.note-h{font-weight:800;font-size:12px;margin-bottom:6px;color:var(--primary);}
.note-block ul{list-style:none;font-size:12.5px;}
.note-block li{padding:3px 0 3px 16px;position:relative;}
.note-block li::before{content:"•";position:absolute;left:2px;color:var(--primary);}
.section-h{font-weight:800;font-size:13px;margin:16px 0 10px;color:var(--text);}
.video-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;}
.video-card{display:flex;gap:12px;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:12px;text-decoration:none;color:inherit;transition:.16s;}
.video-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--primary);}
.vc-thumb{flex:0 0 64px;height:44px;border-radius:8px;background:linear-gradient(135deg,var(--primary),#1d4ed8);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;}
.vc-info{flex:1;min-width:0;}
.vc-teacher{font-size:11px;font-weight:700;color:var(--primary);}
.vc-title{font-size:12.5px;font-weight:600;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;overflow:hidden;}
.vc-link{font-size:10px;color:var(--muted);margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.vc-open{flex:0 0 auto;align-self:center;font-size:11px;color:var(--muted);}
.chapter-actions{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap;}

/* ===== 学习入口 / 学科选择 ===== */
.learn-entry,.test-entry{padding:8px 0;}
.learn-entry,.test-entry{padding:2px 0 8px;}
.entry-title,.test-entry .entry-title{font-size:13px;color:var(--muted);font-weight:600;margin-bottom:16px;}
.subject-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.subject-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px 18px;cursor:pointer;transition:.18s;box-shadow:var(--shadow);}
.subject-card:hover{transform:translateY(-4px);border-color:var(--primary);background:var(--primary-soft);}
.sc-icon{width:44px;height:44px;border-radius:11px;color:var(--c);background:color-mix(in srgb, var(--c) 13%, var(--bg));display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:900;margin-bottom:12px;}
.sc-title{font-weight:900;font-size:15px;}
.sc-meta{font-size:12px;color:var(--muted);margin-top:4px;}
.sc-teacher{font-size:12px;color:var(--muted);margin-top:10px;font-weight:500;}
.sc-go{margin-top:14px;font-size:13px;font-weight:700;color:var(--primary);background:color-mix(in srgb, var(--primary) 10%, var(--bg));display:inline-block;padding:7px 14px;border-radius:8px;transition:.15s;}
.subject-card:hover .sc-go{background:var(--primary);color:#fff;}

/* ===== 刷题 / 测试 ===== */
.test-top{display:flex;align-items:center;gap:16px;margin-bottom:16px;flex-wrap:wrap;}
.test-mode{font-weight:700;color:var(--primary);font-size:14px;}
.test-progress{flex:1;display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted);}
.test-progress .bar{flex:1;height:9px;background:var(--border);border-radius:5px;overflow:hidden;}
.test-progress .bar i{display:block;height:100%;background:var(--primary);transition:width .3s;}
.test-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);max-width:820px;margin:0 auto;}
.q-meta{display:flex;gap:10px;margin-bottom:14px;font-size:12px;}
.q-chapter{background:var(--primary-soft);color:var(--primary);padding:2px 10px;border-radius:6px;font-weight:600;}
.q-type{background:var(--bg);color:var(--muted);padding:2px 10px;border-radius:6px;}
.q-body{font-size:16px;font-weight:600;line-height:1.7;margin-bottom:20px;}
.q-input{margin-bottom:8px;}
.opt-group{display:flex;flex-direction:column;gap:10px;}
.opt{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:13px 16px;text-align:left;font-size:14px;transition:.15s;}
.opt:hover{background:var(--primary-soft);}
.opt.correct{border-color:#22c55e;background:#dcfce7;color:#15803d;}
.opt.wrong{border-color:#ef4444;background:#fee2e2;color:#b91c1c;}
.fill-box{display:flex;gap:10px;}
.fill-box input{flex:1;background:var(--bg);border:1px solid var(--border);border-radius:9px;padding:12px 14px;color:var(--text);font-size:14px;}
.result{margin-top:18px;padding:16px;border-radius:10px;font-size:13.5px;line-height:1.7;}
.result.r-ok{background:#dcfce7;border:1px solid #86efac;}
.result.r-no{background:#fee2e2;border:1px solid #fca5a5;}
.analysis,.takeaway{margin-top:6px;color:var(--muted);}
.q-nav{margin-top:20px;text-align:right;}
.next-btn:disabled{opacity:.4;cursor:not-allowed;}
.test-finish{background:var(--card);border:2px solid;border-radius:var(--radius);padding:40px;text-align:center;max-width:480px;margin:40px auto;}
.finish-title{font-size:18px;font-weight:800;}
.finish-score{font-size:64px;font-weight:900;color:var(--primary);line-height:1;}
.finish-score span{font-size:24px;}
.finish-stat{font-size:14px;color:var(--muted);margin:8px 0 20px;}
.finish-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;}

/* ===== 刷题入口（按学科）===== */
.test-subj{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:16px;box-shadow:var(--shadow);transition:.18s;}
.test-subj:hover{border-color:var(--primary);box-shadow:var(--shadow);}
.ts-head{display:flex;align-items:center;gap:12px;margin-bottom:14px;flex-wrap:wrap;}
.ts-icon{width:34px;height:34px;border-radius:9px;color:var(--c);background:color-mix(in srgb, var(--c) 13%, var(--bg));display:inline-flex;align-items:center;justify-content:center;font-weight:900;}
.ts-head b{font-size:16px;font-weight:900;}
.ts-teacher{margin-left:auto;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:6px 10px;font-size:12px;}
.ts-actions{display:flex;gap:10px;flex-wrap:wrap;}
.ts-actions .btn{display:inline-flex;align-items:center;gap:8px;justify-content:center;min-height:38px;}
.chapter-pick{background:var(--bg);border:1px solid var(--border);border-radius:9px;padding:9px 13px;font-size:13px;font-weight:600;transition:.14s;}
.chapter-pick:hover{background:var(--primary-soft);}
.chapter-pick span{color:var(--muted);font-size:11px;margin-left:6px;}
.ts-chapters{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px;}

/* ===== 错题本 ===== */
.wrong-header{display:flex;flex-direction:column;gap:12px;margin-bottom:18px;}
.wrong-stat{font-size:14px;}
.wrong-stat b{color:var(--primary);}
.wrong-filters{display:flex;gap:8px;flex-wrap:wrap;}
.wrong-actions{display:flex;gap:10px;flex-wrap:wrap;}
.wrong-stat{font-size:14px;}
.wrong-actions{display:flex;gap:10px;}
.wrong-section{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;margin-bottom:20px;box-shadow:var(--shadow);}
.wrong-section .section-h{margin-top:0;}
.wrong-card{background:var(--bg);border:1px solid var(--border);border-top:3px solid var(--c);border-radius:10px;padding:14px 16px;margin-bottom:10px;transition:.15s;}
.wrong-card:hover{box-shadow:var(--shadow);}
.wc-head{display:flex;gap:12px;font-size:12px;font-weight:600;margin-bottom:8px;flex-wrap:wrap;}
.wc-head .wc-rep{margin-left:auto;color:var(--muted);}
.wc-q{font-size:14px;font-weight:600;margin-bottom:6px;}
.wc-ans{font-size:13px;margin-bottom:6px;}
.wc-analysis{font-size:12.5px;color:var(--muted);}
.empty{color:var(--muted);font-size:13px;padding:12px 0;}
.empty-state{text-align:center;padding:38px 20px;color:var(--muted);background:var(--bg);border:1px dashed var(--border);border-radius:12px;margin:10px 0;}
.empty-state .es-icon{font-size:40px;line-height:1;margin-bottom:12px;}
.empty-state .es-txt{font-size:13px;margin-bottom:14px;}
.empty-state .es-btn{display:inline-flex;align-items:center;gap:6px;}

/* ===== 计划 ===== */
.plan-header{display:grid;grid-template-columns:1.4fr 1fr;gap:20px;margin-bottom:20px;align-items:stretch;}
@media (max-width:900px){.plan-header{grid-template-columns:1fr;}}
.plan-target{flex:1;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);}
.pt-title{font-size:16px;font-weight:800;}
.pt-sub,.pt-score{font-size:13px;color:var(--muted);margin-top:8px;}
.pt-score b{color:var(--primary);font-size:18px;}
.exam-date-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);}
.exam-date-box label{display:block;font-size:12px;color:var(--muted);margin-bottom:8px;}
.exam-date-box input{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:8px 12px;color:var(--text);font-size:14px;}
.milestone-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-bottom:20px;}
.ms-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;text-align:center;box-shadow:var(--shadow);cursor:pointer;transition:.15s;}
.ms-card:hover{transform:translateY(-2px);}
.ms-card.done{opacity:.6;}
.ms-check{font-size:26px;}
.ms-name{font-weight:700;font-size:14px;margin:6px 0;}
.ms-date input{background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:4px;font-size:12px;width:100%;text-align:center;}
.ms-left{font-size:11px;color:var(--muted);margin-top:6px;}
.plan-tip{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:12px 14px;font-size:12px;line-height:1.7;color:var(--muted);}

/* ===== 专注 ===== */
.focus-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:36px;text-align:center;box-shadow:var(--shadow);max-width:520px;margin:40px auto;}
.focus-mode{font-size:15px;font-weight:700;color:var(--primary);}
.focus-time{font-size:72px;font-weight:900;font-variant-numeric:tabular-nums;line-height:1.1;margin:10px 0;}
.focus-bar{max-width:340px;margin:0 auto 20px;}
.focus-bar .bar{height:8px;background:var(--border);border-radius:5px;overflow:hidden;}
.focus-bar .bar i{display:block;height:100%;background:var(--primary);transition:width .3s;}
.focus-btns{display:flex;gap:8px;justify-content:center;margin-bottom:16px;}
.focus-control{display:flex;gap:12px;justify-content:center;}
.focus-stat{margin-top:22px;font-size:13px;color:var(--muted);}

/* ===== 数据看板 ===== */
.dash-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.dash-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);}
.dash-card.ring{grid-column:span 2;grid-row:span 2;display:flex;flex-direction:column;align-items:center;justify-content:center;}
.ring-wrap{position:relative;width:160px;height:160px;margin:10px 0;}
.ring-wrap svg{width:100%;height:100%;color:var(--c);}
.ring-num{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:34px;font-weight:900;}
.ring-num span{font-size:15px;margin-left:3px;color:var(--muted);}
.ring-label{font-size:12px;color:var(--muted);}
.dash-card.subj{display:flex;align-items:center;gap:12px;}
.ds-icon{width:40px;height:40px;border-radius:10px;color:var(--c);background:color-mix(in srgb, var(--c) 14%, var(--bg));display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:900;}
.ds-name{font-size:12px;color:var(--muted);}
.ds-time{font-size:22px;font-weight:900;color:var(--text);}
.dash-card.stat{display:flex;flex-direction:column;justify-content:center;}
.subject-time-btns{margin-top:18px;display:flex;gap:10px;align-items:center;flex-wrap:wrap;}
.subject-time-btns span{font-size:13px;color:var(--muted);}

/* ===== Toast ===== */
.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--text);color:var(--bg);padding:12px 22px;border-radius:10px;font-size:14px;opacity:0;transition:.25s;z-index:99;box-shadow:var(--shadow);}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* ===== 响应式 ===== */
@media (max-width:900px){
  .sidebar{position:fixed;top:auto;bottom:0;left:0;right:0;width:100%;height:60px;flex-direction:row;align-items:center;padding:0 4px;z-index:50;border-right:none;border-top:1px solid var(--border);box-shadow:0 -4px 16px rgba(0,0,0,.06);}
  .brand,.side-foot,.nav-item span:not(.nav-ic){display:none;}
  .nav{flex-direction:row;justify-content:space-around;align-items:stretch;height:100%;gap:2px;}
  .nav-item{display:flex;align-items:center;justify-content:center;gap:0;padding:0;font-size:0;flex:1;min-width:0;border-radius:8px;}
  .nav-item .nav-ic{font-size:20px;}
  .nav-item.active::before{display:none;}
  main{height:auto;padding-bottom:70px;}
  .view{padding:16px 14px 40px;}
  .countdown,.subject-grid,.dash-grid{grid-template-columns:repeat(2,1fr);}
  .home-grid,.rule-grid{grid-template-columns:1fr;}
  .notes,.video-list{grid-template-columns:1fr;}
  .milestone-grid{grid-template-columns:repeat(2,1fr);}
  .hero-title{font-size:20px;}
}

/* ==========================================================
   单页试卷模式（所有题目同页，提交后展开解析）
   ========================================================== */
.test-top {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding: 14px 18px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px; margin-bottom: 16px;
  position: sticky; top: 0; z-index: 20;
}
.test-mode { font-weight: 600; color: var(--primary); font-size: 15px; }
.test-progress-text { font-size: 13px; color: var(--muted); }
.test-progress-text b { color: var(--text); font-size: 15px; }
.test-top-actions { margin-left: auto; }

.sheet { display: flex; flex-direction: column; gap: 16px; }
.sheet-q {
  background: var(--card); border: 1px solid var(--border);
  border-left: 4px solid var(--c, var(--primary));
  border-radius: 12px; padding: 16px 18px;
}
.sq-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.sq-no {
  font-weight: 700; color: #fff; background: var(--c, var(--primary));
  padding: 2px 10px; border-radius: 20px; font-size: 12px;
}
.sq-chapter { font-size: 12px; color: var(--muted); }
.sq-type {
  font-size: 11px; color: var(--muted); border: 1px solid var(--border);
  padding: 1px 8px; border-radius: 10px;
}
.sq-body { font-size: 15px; line-height: 1.7; color: var(--text); margin-bottom: 12px; }
.sq-input { margin-bottom: 10px; }
.sq-result { display: none; margin-top: 10px; }

.opt-group { display: flex; flex-direction: column; gap: 8px; }
.opt {
  text-align: left; padding: 10px 14px; border: 1px solid var(--border);
  background: var(--bg); border-radius: 8px; cursor: pointer;
  font-size: 14px; color: var(--text); transition: all .15s;
}
.opt:hover:not(:disabled) { border-color: var(--primary); background: var(--primary-soft); }
.opt.selected { border-color: var(--primary); background: var(--primary-soft); font-weight: 600; }
.opt.correct { border-color: #16a34a; background: #dcfce7; color: #14532d; }
.opt.wrong { border-color: #dc2626; background: #fee2e2; color: #7f1d1d; }
.opt:disabled { cursor: default; opacity: .95; }

.fill-box { display: flex; gap: 8px; }
.fill-box input {
  flex: 1; padding: 10px 14px; border: 1px solid var(--border);
  border-radius: 8px; background: var(--bg); color: var(--text); font-size: 14px;
}
.fill-box input:focus { outline: none; border-color: var(--primary); }

.result {
  border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 14px; font-size: 13.5px; line-height: 1.75;
}
.result.r-ok { background: #f0fdf4; border-color: #bbf7d0; }
.result.r-no { background: #fef2f2; border-color: #fecaca; }
.r-line { font-weight: 600; margin-bottom: 6px; }
.analysis { margin-top: 4px; color: var(--text); }
.takeaway { margin-top: 6px; color: var(--muted); font-style: italic; }

.sheet-bottom {
  margin-top: 20px; padding: 18px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px; text-align: center;
}
.sheet-tip { margin-top: 10px; font-size: 12.5px; color: var(--muted); line-height: 1.6; }

/* 深色主题下的结果配色 */
[data-theme="dark"] .result.r-ok { background: #052e16; border-color: #14532d; }
[data-theme="dark"] .result.r-no { background: #450a0a; border-color: #7f1d1d; }
[data-theme="dark"] .opt.correct { background: #052e16; border-color: #16a34a; color: #bbf7d0; }
[data-theme="dark"] .opt.wrong { background: #450a0a; border-color: #dc2626; color: #fecaca; }

/* ==========================================================
   错题本 · 学科筛选隔离（防串项目）
   ========================================================== */
.wrong-filters { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; }
.wf-btn {
  padding: 6px 14px; border: 1px solid var(--border); background: var(--bg);
  border-radius: 20px; cursor: pointer; font-size: 13px; color: var(--text);
  display: flex; align-items: center; gap: 6px; transition: all .15s;
}
.wf-btn:hover { border-color: var(--primary); }
.wf-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.wf-btn span {
  background: rgba(128,128,128,.2); padding: 0 6px; border-radius: 10px; font-size: 11px;
}
.wf-btn.active span { background: rgba(255,255,255,.3); }


.wc-chapter { font-size: 12px; color: var(--muted); }
.wc-actions { display: flex; gap: 8px; margin-top: 10px; }

/* ==========================================================
   阶段打卡（开始/结束打卡，时长计入看板）
   ========================================================== */
.punch-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px 18px; margin-bottom: 12px;
  box-shadow: var(--shadow); transition: .15s;
}
.punch-card:hover { box-shadow: 0 2px 6px rgba(15,23,42,.1),0 10px 28px rgba(15,23,42,.08); }
.pc-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }

.pc-slot { font-size: 12px; color: var(--muted); }
.pc-timer { font-size: 26px; font-weight: 900; font-variant-numeric: tabular-nums; margin: 8px 0 10px; color: var(--text); }
.pc-btns { display: flex; gap: 8px; flex-wrap: wrap; }

.punch-summary {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px 16px; margin-bottom: 16px; font-size: 14px;
  box-shadow: var(--shadow);
}
.ps-total { font-size: 18px; font-weight: 700; color: var(--primary); }

/* 打卡弹窗（模态） */
.modal-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 1000;
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal {
  background: var(--surface); border-radius: 14px; padding: 22px;
  max-width: 420px; width: 100%; border: 1px solid var(--border);
}
.modal h3 { margin: 0 0 12px; font-size: 17px; }
.modal .field { margin-bottom: 12px; }
.modal label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 5px; }
.modal select, .modal input {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border);
  border-radius: 8px; background: var(--bg); color: var(--text); font-size: 14px;
}
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 16px; }

/* 微信订阅设置 */
.sub-row {
  display: flex; align-items: center; gap: 10px; padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.sub-row:last-child { border-bottom: none; }
.sub-info { flex: 1; }
.sub-title { font-size: 14px; font-weight: 600; }
.sub-desc { font-size: 12px; color: var(--muted); margin-top: 2px; }
.switch {
  width: 44px; height: 24px; border-radius: 12px; background: var(--border);
  position: relative; cursor: pointer; transition: background .2s; flex-shrink: 0;
}
.switch.on { background: var(--primary); }
.switch::after {
  content: ''; position: absolute; top: 2px; left: 2px; width: 20px; height: 20px;
  background: #fff; border-radius: 50%; transition: transform .2s;
}
.switch.on::after { transform: translateX(20px); }

/* ==========================================================
   计划页：时间分配 / 阶段 / 每日安排
   ========================================================== */
.alloc-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(150px,1fr)); gap: 12px; }
.alloc-item {
  display: flex; align-items: center; gap: 8px; padding: 12px;
  border: 1px solid var(--border); border-left: 4px solid var(--c);
  border-radius: 10px; background: var(--bg);
}
.ai-icon {
  width: 28px; height: 28px; border-radius: 8px; color: var(--c);
  background: color-mix(in srgb, var(--c) 14%, var(--bg));
  display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700;
}
.ai-name { font-weight: 600; font-size: 14px; }
.ai-hours { margin-left: auto; font-weight: 700; color: var(--c); }
.ai-pct { font-size: 12px; color: var(--muted); }

.phase-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(200px,1fr)); gap: 12px; }
.phase-card {
  padding: 16px; border-radius: 12px; background: var(--card);
  border: 1px solid var(--border); box-shadow: var(--shadow);
}
.ph-name { font-weight: 800; color: var(--text); font-size: 15px; }
.ph-days { font-size: 13px; font-weight: 600; color: var(--c); margin-top: 6px; }
.ph-desc { font-size: 12.5px; color: var(--muted); margin-top: 6px; line-height: 1.6; }
.ph-days { font-size: 13px; color: var(--muted); margin: 4px 0; }
.ph-desc { font-size: 12.5px; color: var(--muted); line-height: 1.5; }

.sched { display: flex; flex-direction: column; gap: 8px; }
.sched-row {
  display: flex; align-items: center; gap: 10px; padding: 11px 12px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; flex-wrap: wrap; transition: .15s;
}
.sched-row:hover { background: var(--card); box-shadow: var(--shadow); }
.sch-time { font-weight: 700; color: var(--text); min-width: 96px; }
.sch-label { color: var(--muted); flex: 1; min-width: 120px; }
.sch-hours { font-weight: 700; color: var(--primary); }
.sch-time { font-weight: 700; font-variant-numeric: tabular-nums; min-width: 110px; }
.sch-subj,.pc-subj,.wc-subj,.pr-subj {
  color: var(--c); background: color-mix(in srgb, var(--c) 13%, var(--bg));
  padding: 2px 9px; border-radius: 10px; font-size: 11px; font-weight: 700;
}
.sch-label { color: var(--muted); flex: 1; }
.sch-hours { font-weight: 700; color: var(--primary); }

/* 打卡记录条目 */
.punch-rec {
  display: flex; align-items: center; gap: 10px; padding: 8px 0;
  border-bottom: 1px solid var(--border); font-size: 13.5px; flex-wrap: wrap;
}
.punch-rec:last-child { border-bottom: none; }
.pr-subj { color: #fff; padding: 1px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.pr-dur { margin-left: auto; font-weight: 700; color: var(--primary); font-variant-numeric: tabular-nums; }

.ring-sub { font-size: 13px; color: var(--muted); margin-top: 4px; font-variant-numeric: tabular-nums; }
.dash-actions { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }

/* ============================================================
   手机端增强：打卡卡片 / 学习计划表 / 订阅弹窗 / 闹钟浮层 / Toast
   ============================================================ */
.toast{position:fixed;left:50%;bottom:80px;transform:translateX(-50%) translateY(20px);
  background:rgba(15,23,42,.92);color:#fff;padding:11px 20px;border-radius:22px;font-size:13px;
  font-weight:600;z-index:9999;opacity:0;transition:.3s;pointer-events:none;max-width:80vw;text-align:center;}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* ---- 打卡卡片：上时间 / 中学科内容 / 下目标+按钮 ---- */
#checkin-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;margin-bottom:16px;}
.ck-top{background:linear-gradient(120deg,var(--primary),var(--primary-soft));color:#fff;padding:16px 18px;text-align:center;}
.ck-date{font-size:12px;opacity:.9;}
.ck-clock{font-size:40px;font-weight:800;letter-spacing:1px;font-variant-numeric:tabular-nums;line-height:1.15;}
.ck-sec{font-size:18px;opacity:.8;}
.ck-slot{margin-top:6px;display:inline-block;background:rgba(255,255,255,.22);padding:3px 12px;border-radius:20px;font-size:12px;font-weight:700;}
.ck-slot.ongoing{background:rgba(16,185,129,.9);}
.ck-slot.break{background:rgba(255,255,255,.25);}
.ck-slot.done{background:rgba(16,185,129,.9);}
.ck-mid{display:flex;align-items:center;gap:12px;padding:16px 18px;border-bottom:1px dashed var(--border);}
.ck-mid.empty{padding:26px 18px;color:var(--muted);justify-content:center;}
.ck-icon{width:44px;height:44px;flex:0 0 44px;border-radius:12px;color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;}
.ck-subj{font-size:12px;font-weight:800;color:var(--c);margin-bottom:3px;}
.ck-task{font-size:14px;font-weight:600;line-height:1.5;color:var(--text);}
.ck-bottom{padding:14px 18px 18px;}
.ck-goal,.ck-out{font-size:13px;color:var(--text);margin-bottom:7px;line-height:1.5;}
.g-l{display:inline-block;background:var(--primary-soft);color:var(--primary);font-size:11px;font-weight:800;
  padding:2px 8px;border-radius:8px;margin-right:8px;}
.ck-btns{display:flex;gap:9px;flex-wrap:wrap;margin-top:12px;}
.ck-btns .btn{flex:1;min-width:110px;text-align:center;justify-content:center;}
.ck-btns .btn.done{background:#10b981;color:#fff;}
.ck-btns .btn:disabled{opacity:.75;cursor:default;}

/* ---- 学习计划表（弹窗内，学科行浅色底 + 右侧进度标记）---- */
.sch-head{padding:14px 16px;border-bottom:1px solid var(--border);}
.sch-title{font-size:15px;font-weight:800;color:var(--text);}
.sch-sub{font-size:11.5px;color:var(--muted);margin-top:4px;}
.sch-wrap{overflow:auto;max-height:58vh;}
.sch-table{width:100%;border-collapse:collapse;font-size:12.5px;}
.sch-table th{position:sticky;top:0;background:var(--surface);color:var(--muted);font-size:11px;font-weight:800;
  text-align:left;padding:9px 10px;border-bottom:2px solid var(--border);z-index:2;}
.sch-table td{padding:9px 10px;border-bottom:1px solid var(--border);vertical-align:top;line-height:1.45;}
.sch-table tr.row-break{background:rgba(148,163,184,.10);color:var(--muted);}
.sch-table tr.row-break .c-task{font-style:italic;}
.sch-table tr:not(.row-break){background:color-mix(in srgb,var(--c) 7%,transparent);}
.c-time{font-variant-numeric:tabular-nums;font-weight:700;white-space:nowrap;color:var(--text);font-size:12px;}
.c-time span{font-size:10.5px;color:var(--muted);font-weight:500;}
.c-subj{white-space:nowrap;font-weight:700;color:var(--c);font-size:12px;}
.c-subj .dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:5px;vertical-align:middle;}
.c-task{color:var(--text);min-width:190px;}
.c-goal{color:var(--muted);font-size:12px;min-width:120px;}
.c-mark{text-align:center;font-size:15px;font-weight:800;}
.st-todo{color:var(--muted);}
.st-now{background:rgba(37,99,235,.10)!important;}
.st-now .c-mark{color:var(--primary);}
.st-done .c-mark{color:#10b981;}
.st-ok .c-mark{color:#10b981;}
.st-ok{background:rgba(16,185,129,.08)!important;}

/* ---- 通用弹窗 ---- */
.modal{position:fixed;inset:0;background:rgba(15,23,42,.55);z-index:500;display:none;align-items:flex-end;justify-content:center;}
.modal.show{display:flex;}
.modal-box{background:var(--surface);width:100%;max-width:760px;max-height:88vh;border-radius:18px 18px 0 0;
  display:flex;flex-direction:column;overflow:hidden;animation:slideUp .25s ease;}
@keyframes slideUp{from{transform:translateY(30px);opacity:0;}to{transform:translateY(0);opacity:1;}}
.modal-head{padding:14px 18px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;
  background:var(--card);font-weight:800;font-size:15px;}
.modal-close{cursor:pointer;font-size:22px;color:var(--muted);line-height:1;padding:0 6px;}
.modal-close:hover{color:var(--text);}
.modal-body{overflow:auto;padding:0;}

/* ---- 订阅服务弹窗 ---- */
.sub-block{padding:16px 18px;border-bottom:1px solid var(--border);}
.sub-h{font-size:14px;font-weight:800;color:var(--text);margin-bottom:8px;}
.sub-p{font-size:12.5px;color:var(--text);line-height:1.65;}
.sub-p.dim{color:var(--muted);}
.sub-state{margin:10px 0;padding:8px 12px;border-radius:9px;font-size:12.5px;font-weight:700;}
.sub-state.on{background:rgba(16,185,129,.12);color:#059669;}
.sub-state.off{background:rgba(234,88,12,.10);color:#c2410c;}
.sub-btns{display:flex;gap:9px;flex-wrap:wrap;margin-top:11px;}
.sub-btns .btn{flex:1;min-width:130px;text-align:center;}
.sub-block.wx{background:rgba(148,163,184,.07);}

/* ---- 闹钟浮层（前台响铃界面，锁屏靠系统通知）---- */
.alarm-overlay{position:fixed;inset:0;z-index:900;display:none;align-items:center;justify-content:center;
  background:rgba(15,23,42,.62);backdrop-filter:blur(3px);}
.alarm-overlay.show{display:flex;}
.alarm-card{background:var(--surface);border-radius:20px;padding:28px 26px;text-align:center;max-width:340px;width:86%;
  box-shadow:0 20px 60px rgba(0,0,0,.35);animation:bellShake .55s ease-in-out infinite alternate;}
@keyframes bellShake{from{transform:rotate(-1.6deg) scale(.99);}to{transform:rotate(1.6deg) scale(1.01);}}
.alarm-bell{font-size:52px;line-height:1;margin-bottom:6px;}
.alarm-title{font-size:19px;font-weight:800;color:var(--text);margin-bottom:8px;}
.alarm-task{font-size:13.5px;color:var(--text);line-height:1.55;margin-bottom:8px;}
.alarm-goal{font-size:12.5px;color:var(--muted);margin-bottom:18px;line-height:1.5;}
.alarm-btns{display:flex;gap:10px;}
.alarm-btns .btn{flex:1;text-align:center;}

/* ---- 移动端微调 ---- */
@media(max-width:820px){
  .sch-table{font-size:12px;}
  .c-goal{display:none;}
  .alarm-card{padding:24px 20px;}
}