:root{
  --brand:#2b7de9; --brand-d:#1b63c0; --ink:#1f2733; --sub:#6b7686;
  --line:#e6eaf0; --bg:#f5f7fb; --card:#ffffff; --accent:#e4453b;
  --headH:54px;          /* 顶部栏高度（sticky 定位用） */
  --pad:16px;            /* 主内容左右留白 */
  --cvh:380px;           /* 仿真画布高度：不同屏幕自动换算 */
  --safeB:env(safe-area-inset-bottom,0px);
  --tap:44px;            /* 最小可点击尺寸 */
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:var(--bg);
  -webkit-text-size-adjust:100%;overscroll-behavior-y:none;overflow-x:hidden;touch-action:manipulation}
a{color:inherit}
img{max-width:100%}

/* ============ 顶栏 ============ */
header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.bar{max-width:1360px;margin:0 auto;display:flex;align-items:center;gap:12px;padding:10px var(--pad)}
.logo{width:34px;height:34px;flex:0 0 auto}
.brand{font-size:19px;font-weight:800;letter-spacing:.5px;line-height:1.15}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--sub);letter-spacing:0}
.search{flex:1;max-width:340px;margin-left:auto;position:relative}
.search input{width:100%;padding:9px 12px;border:1px solid var(--line);border-radius:20px;font-size:16px;outline:none;background:#fff}
.search input:focus{border-color:var(--brand)}
main{max-width:1360px;margin:0 auto;padding:14px var(--pad) calc(40px + var(--safeB))}

/* ============ 首页：学段/学科标签 + 筛选 + 卡片 ============ */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:6px 0 14px}
.tabs-grade{margin:10px 0 6px}
.tabs-grade .tab{background:#f3f1ff;border-color:#e2dcff;color:#6b5bd6}
.tabs-grade .tab.active{background:#6b5bd6;border-color:#6b5bd6;color:#fff}
.tab{border:1px solid var(--line);background:#fff;color:var(--sub);padding:7px 16px;border-radius:18px;font-size:14px;cursor:pointer;white-space:nowrap}
.tab.active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:0 0 14px}
.filters select{padding:7px 12px;border:1px solid var(--line);border-radius:18px;background:#fff;font-size:13px;color:var(--ink);outline:none;cursor:pointer}
.filters select:focus{border-color:var(--brand)}
.filters .fnew{font-size:13px;color:var(--sub);display:flex;align-items:center;gap:5px;cursor:pointer;user-select:none}
.filters .fnew input{width:16px;height:16px;accent-color:var(--brand)}
.filters .fcount{margin-left:auto;font-size:12px;color:var(--sub)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.card{position:relative;overflow:hidden;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;cursor:pointer;transition:.15s;display:flex;flex-direction:column;gap:6px}
.card:hover{transform:translateY(-3px);box-shadow:0 8px 22px rgba(40,80,160,.12);border-color:#cfe0fb}
.card:active{transform:scale(.985)}
.card-sub{font-size:12px;color:var(--brand);font-weight:600}
.card-title{font-size:17px;font-weight:700}
.card-desc{font-size:13px;color:var(--sub);line-height:1.5}
.card-chap{font-size:11px;color:#9a6b00;background:#fff5e0;border:1px solid #ffe2a8;border-radius:6px;padding:3px 7px;line-height:1.4}
.empty{color:var(--sub);padding:40px;text-align:center;grid-column:1/-1}
/* 缩略图 + 收藏 + 新标记 */
.thumb{height:140px;background:#eef2f7 center/cover no-repeat;border-radius:9px;margin-bottom:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:30px;font-weight:800;letter-spacing:1px}
.thumb.fallback{text-shadow:0 1px 3px rgba(0,0,0,.28);font-size:15px;line-height:1.35;padding:8px 10px;text-align:center;letter-spacing:0}
.card .fav{position:absolute;top:10px;right:10px;width:34px;height:34px;border:none;background:rgba(255,255,255,.9);border-radius:50%;font-size:18px;line-height:1;cursor:pointer;color:#b9c2cf;box-shadow:0 2px 6px rgba(0,0,0,.12);z-index:2}
.card .fav.on{color:#ffb300}
.card .fav:hover{transform:scale(1.08)}
.badge-new{position:absolute;top:10px;left:10px;background:var(--accent);color:#fff;font-size:11px;font-weight:700;padding:2px 8px;border-radius:10px;z-index:2}

/* ============ 详情页（仿真页）：手机优先 ============ */
#detail{display:none}
#back{border:1px solid var(--line);background:#fff;border-radius:10px;padding:10px 16px;cursor:pointer;font-size:14px;margin-bottom:10px;min-height:40px}
#back:hover{border-color:var(--brand);color:var(--brand)}
#simTitle{margin:4px 0 2px;font-size:22px}
.dhead{display:flex;align-items:center;gap:10px}
.dhead h2{margin:4px 0 2px;font-size:22px;flex:1}
.favbig{border:1px solid var(--line);background:#fff;border-radius:20px;padding:8px 18px;cursor:pointer;font-size:14px;font-weight:600;white-space:nowrap;min-height:40px;flex:0 0 auto}
.favbig.on{background:#fff7e0;border-color:#ffd166;color:#b07d00}
.meta{color:var(--sub);font-size:13px;margin-bottom:6px}
/* 详情页操作提示：与首页卡片描述一致，点进来也能看到「调什么、看什么」 */
.sim-tip{margin:0 0 12px;padding:9px 14px;font-size:13.5px;line-height:1.65;color:#37527d;
  background:linear-gradient(90deg,#eef4ff,#f7faff);border:1px solid #d9e6fb;border-left:4px solid var(--brand);
  border-radius:0 10px 10px 0}
.sim-tip::before{content:'操作提示';display:inline-block;margin-right:8px;padding:1px 8px;border-radius:6px;
  background:var(--brand);color:#fff;font-size:11.5px;font-weight:700;letter-spacing:.5px;vertical-align:1px}

/* 仿真外壳：默认（手机）为纵向，画面在最上方 */
.sim{display:flex;flex-direction:column;gap:12px}
.sim>.sim-view{order:-1}                      /* 手机上先看画面，参数区排在下面 */
.sim-panel{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;display:flex;flex-direction:column;gap:10px}
.ctrl{display:flex;align-items:center;gap:8px;font-size:13px;min-height:var(--tap)}
.ctrl label{width:74px;flex:0 0 74px;color:var(--sub)}
.ctrl input[type=range]{flex:1;min-width:80px}
.ctrl input[type=text],.ctrl select{flex:1;padding:8px 10px;border:1px solid var(--line);border-radius:8px;font-size:16px}
.ctrl b{width:46px;text-align:right;font-variant-numeric:tabular-nums;color:var(--ink)}
.ctrl i{font-style:normal;color:var(--sub);font-size:12px;width:34px}
.btns{display:flex;gap:8px;flex-wrap:wrap}
button.primary{background:var(--brand);color:#fff;border:none;border-radius:10px;padding:11px 18px;font-size:14px;cursor:pointer;font-weight:600;min-height:var(--tap)}
button.primary:hover{background:var(--brand-d)}
.btns button:not(.primary){background:#fff;border:1px solid var(--line);border-radius:10px;padding:11px 18px;font-size:14px;cursor:pointer;min-height:var(--tap)}
button.primary:active,.btns button:active{transform:scale(.97)}
.sim-view{position:relative;background:#fff;border:1px solid var(--line);border-radius:12px;padding:6px}
#cv{width:100%;height:var(--cvh);display:block;background:#fff;border-radius:8px;touch-action:none}
/* 仿真面板内的小提示行 */
.sim-hint{margin-top:8px;padding:7px 10px;font-size:12px;line-height:1.6;color:#7a6a3c;
  background:#fffbe9;border:1px dashed #e8d79a;border-radius:8px}
.sim-readout{background:#eef4ff;border:1px solid #d6e6ff;border-radius:10px;padding:10px 14px;font-size:14.5px;line-height:1.6;color:#27406b}
.sim-readout b{color:var(--brand-d)}

/* 放大按钮：由 JS 挂到画布（.sim-view）右上角；进入放大后隐藏（顶部条有退出） */
#cvFs{position:absolute;right:8px;top:8px;z-index:8;width:34px;height:34px;padding:0;
  border:1px solid #cdd8e8;border-radius:10px;background:rgba(255,255,255,.96);color:#3f6fb5;
  font-size:16px;font-weight:700;line-height:1;cursor:pointer;box-shadow:0 2px 6px rgba(30,60,120,.12)}
#cvFs.wide{width:auto;height:34px;padding:0 12px;font-size:13px;border-radius:999px}
body.cv-fs #cvFs{display:none}
/* 小屏使用提示（可永久关闭） */
.mhint{display:flex;align-items:center;gap:8px;margin-top:8px;padding:8px 12px;font-size:12px;line-height:1.5;
  color:#6a5a2a;background:#fffaeb;border:1px dashed #e8d79a;border-radius:10px}
.mhint span{flex:1}
.mhint b{flex:0 0 auto;color:#2b7de9;font-size:12px;cursor:pointer;padding:4px 6px}

/* =======================================================================
   放大观看模式（手机关键功能，解决「画面挤、字太小」）
   进入后 #simView 铺满视口：画布全出血不裁切；顶部/底部操作条悬浮其上；
   参数面板变为底部抽屉（不再被画布盖住）；读数变为可点击收起的 HUD。
   触发：点画布右上「⛶ 放大」/ 在画布上双击 / 手机横屏自动进入。
   ======================================================================= */
body.cv-fs{overflow-y:auto;overflow-x:hidden;background:#0b1020}
body.cv-fs #simView{position:relative;min-height:100vh;z-index:1;
  padding:0;border:0;border-radius:0;background:transparent;overscroll-behavior-y:contain}
body.cv-fs .mhint{display:none}
body.cv-fs .sim{height:auto;margin:0;gap:0}
body.cv-fs .sim>.sim-view{position:relative;top:auto;left:auto;order:0;height:100vh;z-index:1;
  border:0;border-radius:0;padding:0;background:transparent}
body.cv-fs #cv{width:100%!important;height:100%!important;border-radius:0;background:transparent}
body.cv-fs .vivid{border-radius:0;box-shadow:none}
/* 读数 HUD：悬浮画布上方，点一下收起/展开 */
body.cv-fs .sim-readout{position:absolute;left:8px;right:8px;top:52px;z-index:6;
  max-height:64px;overflow:hidden;font-size:13px;line-height:1.5;padding:7px 12px;
  border-radius:10px;cursor:pointer;background:rgba(238,244,255,.94);
  box-shadow:0 4px 16px rgba(0,0,0,.28);transition:max-height .18s,opacity .18s}
body.cv-fs .sim-readout.zro-off{max-height:0;padding-top:0;padding-bottom:0;border-width:0;opacity:0;pointer-events:none}
/* 参数抽屉：底部弹出，不挤占画布；小屏内可滚动 */
body.cv-fs .sim-panel{position:absolute;left:8px;right:8px;bottom:58px;z-index:7;
  display:none;max-height:min(58%,360px);overflow:auto;
  box-shadow:0 -6px 28px rgba(0,0,0,.4)}
body.cv-fs.zsheet .sim-panel{display:flex}
/* 顶部操作条（标题 / 横屏提示 / 退出） */
.zbar{position:absolute;left:0;right:0;top:0;height:44px;z-index:10;
  display:flex;align-items:center;gap:10px;padding:0 10px;color:#e8eefc;
  background:linear-gradient(180deg,rgba(11,16,32,.93),rgba(11,16,32,.70))}
.zbar .zt{flex:1;min-width:0;font-size:13.5px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.zbar .zrot{flex:0 0 auto;font-style:normal;font-size:12px;color:#ffd166;white-space:nowrap}
.zbar .zx{flex:0 0 auto;min-height:32px;padding:6px 12px;font-size:12.5px;color:#fff;cursor:pointer;
  border:1px solid rgba(255,255,255,.35);border-radius:999px;background:rgba(255,255,255,.12)}
.zbar .zx:hover{background:rgba(255,255,255,.22)}
/* 底部手柄（参数抽屉开关 + 提示） */
.zhandle{position:absolute;left:0;right:0;bottom:0;height:48px;z-index:10;
  display:flex;align-items:center;gap:10px;padding:0 10px;color:#cfd9ee;
  background:linear-gradient(0deg,rgba(11,16,32,.94),rgba(11,16,32,.70))}
.zhandle .zp{flex:0 0 auto;min-height:36px;padding:8px 14px;font-size:13px;font-weight:600;color:#fff;cursor:pointer;
  border:1px solid rgba(255,255,255,.35);border-radius:999px;background:rgba(255,255,255,.14)}
.zhandle .zp:hover{background:rgba(255,255,255,.24)}
.zhandle .ztip{flex:1;text-align:right;font-size:11.5px;color:#93a3c0}
/* 放大态页面可纵向滚动：顶/底操作条固定常驻，不被滚动带走 */
body.cv-fs .zbar,body.cv-fs .zhandle{position:fixed}
@media(orientation:landscape){.zbar .zrot{display:none}}

/* 教师面板 */
.sim-host{display:flex;flex-direction:column;gap:14px}
.sim-col{display:flex;flex-direction:column;gap:14px;min-width:0}
.teacher{background:#fffdf6;border:1px solid #f0e2bd;border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:12px}
.teacher-h{font-size:15px;font-weight:800;color:#9a6b00;border-bottom:2px solid #ffe2a8;padding-bottom:6px;display:flex;justify-content:space-between;align-items:center;gap:8px;cursor:pointer}
.sheet-btn{font-size:12px;font-weight:600;color:#14508f;background:#eaf2ff;border:1px solid #cfe0ff;border-radius:8px;padding:7px 10px;cursor:pointer;flex:0 0 auto}
.sheet-btn:hover{background:#dbe9ff}
.teacher-row{font-size:13px;line-height:1.6;display:flex;flex-direction:column;gap:3px}
.teacher-row .k{font-size:11px;font-weight:700;color:#b07d00;letter-spacing:.5px}
.teacher-tip span:last-child{background:#fff7e6;border:1px solid #ffe2a8;border-radius:8px;padding:6px 9px;color:#7a5a00}
.teacher-tip{margin-top:2px}
.teacher-tasks{display:flex;flex-direction:column;gap:10px}
.task{background:#fff;border:1px solid #efe6cf;border-radius:9px;padding:10px;font-size:13px;line-height:1.55}
.task-q{font-weight:700;color:var(--ink)}
.task-op{color:var(--sub);margin:4px 0}
.task-blank input{width:100%;margin-top:5px;padding:8px 10px;border:1px solid #e4d9b8;border-radius:8px;font-size:16px;outline:none}
.task-blank input:focus{border-color:#d9a200}
.teacher-foot{font-size:11px;color:var(--sub);line-height:1.5}
/* 折叠（手机/平板竖屏默认收起，点标题展开） */
/* ===== 收起/展开：高对比实心胶囊 + 箭头，提升可发现性 ===== */
.fold-btn{flex:0 0 auto;margin-left:auto;display:inline-flex;align-items:center;gap:5px;font-size:13px;font-weight:800;line-height:1;color:#fff;background:linear-gradient(135deg,#2b7de9,#5aa0f5);border:1px solid #2b7de9;border-radius:999px;padding:7px 14px;cursor:pointer;white-space:nowrap;box-shadow:0 3px 10px rgba(43,125,233,.32);transition:transform .12s ease,box-shadow .15s ease,filter .15s ease;animation:foldHint 1.6s ease-in-out 2}
.fold-btn:hover{filter:brightness(1.06);box-shadow:0 5px 14px rgba(43,125,233,.42)}
.fold-btn:active{transform:scale(.95)}
.fold-btn::after{content:'\25BE';font-size:11px;line-height:1;opacity:.95}
.folded .fold-btn::after{content:'\25B8'}
.kc-head .fold-btn{background:linear-gradient(135deg,#e0913b,#f0b73f);border-color:#e0913b;box-shadow:0 3px 10px rgba(224,145,59,.32)}
.kc-head .fold-btn:hover{box-shadow:0 5px 14px rgba(224,145,59,.45)}
.trial-h .fold-btn{background:linear-gradient(135deg,#6a4fbf,#8a6fe0);border-color:#6a4fbf;box-shadow:0 3px 10px rgba(106,79,191,.32)}
.trial-h .fold-btn:hover{box-shadow:0 5px 14px rgba(106,79,191,.45)}
@keyframes foldHint{0%,100%{transform:scale(1)}8%{transform:scale(1.09)}16%{transform:scale(1)}24%{transform:scale(1.06)}32%{transform:scale(1)}}

/* ===== 首页顶部「公测版本」水印（正式上线：删除 index.html 里的 .beta-wm 段即可） ===== */
#home{position:relative}
.beta-wm{position:absolute;top:0;left:0;right:0;height:200px;overflow:hidden;pointer-events:none;z-index:4;-webkit-user-select:none;user-select:none;opacity:.12}
.beta-wm span{position:absolute;font-weight:900;color:var(--brand);letter-spacing:12px;white-space:nowrap;line-height:1;transform:rotate(-8deg)}
.beta-wm span:nth-child(1){top:2px;left:1%;font-size:54px}
.beta-wm span:nth-child(2){top:70px;left:26%;font-size:42px;opacity:.8}
.beta-wm span:nth-child(3){top:126px;left:6%;font-size:58px;opacity:.7}
.folded>.teacher-row,.folded>.teacher-tasks,.folded>.teacher-foot,.folded>.teacher-badge,.folded>.export-zone,.folded>.kc-body{display:none}

/* ===== 角色切换：学生 ⇄ 教师（备课）===== */
.role-btn{flex:0 0 auto;font-size:12.5px;font-weight:700;color:#8a6b00;background:#fff8e8;
  border:1px solid #ffe2a8;border-radius:999px;padding:8px 12px;cursor:pointer;min-height:36px;white-space:nowrap}
.role-btn.on{color:#fff;background:linear-gradient(135deg,#2b7de9,#14508f);border-color:#14508f}
.audio-btn{flex:0 0 auto;font-size:16px;line-height:1;background:#fff;border:1px solid #d7deea;border-radius:999px;padding:6px 9px;cursor:pointer;min-height:36px;min-width:38px;display:flex;align-items:center;justify-content:center}
.audio-btn.off{filter:grayscale(1);opacity:.6}
.modal-mask{position:fixed;inset:0;background:rgba(12,20,35,.55);display:none;align-items:center;justify-content:center;z-index:300;padding:18px}
.modal-box{background:#fff;border-radius:16px;padding:20px;width:100%;max-width:350px;box-shadow:0 18px 50px rgba(20,40,80,.3)}
.modal-box h3{margin:0 0 8px;font-size:17px;color:var(--ink)}
.modal-p{font-size:13px;color:var(--sub);line-height:1.7;margin:0 0 12px}
.modal-p b{color:#b07d00}
.modal-box input[type=text]{width:100%;padding:12px;font-size:16px;border:1px solid var(--line);border-radius:10px;outline:none}
.modal-box input[type=text]:focus{border-color:var(--brand)}
.modal-btns{display:flex;gap:10px;margin-top:14px}
.modal-btns button{flex:1;padding:12px;border-radius:10px;border:1px solid var(--line);background:#f5f8fd;font-size:14px;font-weight:700;cursor:pointer;color:var(--sub)}
.modal-btns .primary{background:var(--brand);border-color:var(--brand);color:#fff}
.modal-foot{font-size:11px;color:var(--sub);margin:10px 0 0;line-height:1.6}

/* 备课模式：视觉上一眼区分 */
body.role-teacher .teacher{border-color:#9ec2ff;background:#f7faff}
.teacher-badge{font-size:11.5px;font-weight:700;color:#14508f;background:#e8f1ff;border:1px dashed #b9d3ff;border-radius:8px;padding:6px 9px;line-height:1.5}
.task-ans{margin-top:7px;font-size:12px;color:#8a5a00}
.task-ans input{width:100%;margin-top:4px;padding:8px 10px;border:1px dashed #e0b96b;border-radius:8px;background:#fffaf0;font-size:16px;outline:none}
/* 导出区 */
.export-zone{border-top:1px dashed var(--line);padding-top:12px;display:flex;flex-direction:column;gap:10px}
.export-row{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap}
.export-note{font-size:12px;color:var(--sub)}
.chk{font-size:12.5px;color:var(--sub);white-space:nowrap}
.chk input{width:16px;height:16px;vertical-align:-2px;margin-right:4px}
.export-btns{display:flex;gap:8px;flex-wrap:wrap}
.sheet-btn.ghost{background:#fff;color:var(--sub);border-color:var(--line)}
.sheet-img-box{margin-top:10px;border:1px solid var(--line);border-radius:12px;padding:10px;background:#fff}
.sheet-img-box img{width:100%;display:block;border-radius:8px;border:1px solid #eef2f8}
.sheet-img-tip{font-size:12px;color:var(--sub);margin:8px 0 0;line-height:1.6}
.sheet-img-btns{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.sheet-img-btns a{text-decoration:none}

/* ===== 我的战绩 / 掌握度 / 问道试炼 ===== */
.me-chip{flex:0 0 auto;display:flex;flex-direction:column;line-height:1.25;cursor:pointer;
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:6px 12px;min-height:40px;justify-content:center}
.me-chip b{font-size:13px;color:var(--ink)}
.me-chip i{font-size:11px;font-style:normal;color:var(--sub);white-space:nowrap}
.me-chip.setup{background:linear-gradient(135deg,#fff6e0,#ffe9bd);border-color:#ffd98a;color:#8a6b00}
.me-chip.setup b{display:none}
.me-chip.setup i{font-size:13px;font-weight:700;color:#8a6b00}
.grade-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:6px 0 4px}
.grade-opt{padding:14px 0;border:1px solid var(--line);background:#f7f9fc;border-radius:12px;font-size:15px;font-weight:700;color:var(--ink);cursor:pointer}
.grade-opt:hover{border-color:var(--brand);color:var(--brand);background:#fff}
.pf-row{display:flex;justify-content:space-between;gap:10px;font-size:13.5px;padding:8px 0;border-bottom:1px dashed #e9edf4;color:var(--sub)}
.pf-row b{color:var(--ink)}
.modal-box.wide{max-width:520px;max-height:86vh;overflow:auto}
.grade-school{width:100%;padding:12px;font-size:15px;border:1px solid var(--line);border-radius:10px;outline:none;margin:10px 0 2px;box-sizing:border-box}
.grade-school:focus{border-color:var(--brand)}
/* 首页常驻「我的战绩」面板：顶栏在小程序里被隐藏，这里始终可见 */
.me-panel{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;background:linear-gradient(135deg,#f3f8ff,#e9f0ff);border:1px solid #dbe6fb;border-radius:14px;padding:12px 16px;margin:0 0 14px}
.me-panel.empty{justify-content:space-between;background:#fff7e9;border-color:#ffe1a6}
.mep-item{display:flex;flex-direction:column;line-height:1.25}
.mep-k{font-size:11px;color:#7a8aa8}
.mep-v{font-size:16px;font-weight:800;color:#1b2a44}
.mep-pts{color:#e0913b}
.mep-tier{color:#2b7de9}
.mep-prog .mep-v{font-size:14px;font-weight:700;color:#5a6880}
.mep-btn{margin-left:auto;padding:8px 15px;border:1px solid #2b7de9;background:#2b7de9;color:#fff;border-radius:999px;font-size:13px;font-weight:700;cursor:pointer}
.mep-btn:active{opacity:.85}
.mep-tip{font-size:13.5px;color:#8a6b00;flex:1}

.mst-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:10px 0 4px}
.mst-lab{font-size:13px;color:var(--sub)}
.mst-chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;font-size:13px;font-weight:700;
  cursor:pointer;color:var(--sub);min-height:38px}
.mst-chip.bad{border-color:#f3c9c5;color:#c0392b;background:#fff5f4}
.mst-chip.mid{border-color:#ffdf9e;color:#8a6b00;background:#fffaf0}
.mst-chip.good{border-color:#a9e3c4;color:#1f8a55;background:#f3fdf7}
.mst-chip.on.bad{background:#e4453b;color:#fff;border-color:#e4453b}
.mst-chip.on.mid{background:#e0a800;color:#fff;border-color:#e0a800}
.mst-chip.on.good{background:#1faf6b;color:#fff;border-color:#1faf6b}
.mst-note{font-size:11.5px;color:var(--sub)}
.mst-chip.me-mini{background:#fff8e8;color:#8a6b00;border-color:#ffe2a8;margin-left:auto}
body.mini-app .me-chip{display:none}
.badge-mst{position:absolute;left:8px;bottom:8px;z-index:3;font-size:11px;font-weight:700;color:#fff;border-radius:8px;padding:3px 8px}
.badge-mst.bad{background:#e4453b}
.badge-mst.mid{background:#e0a800}
.badge-mst.good{background:#1faf6b}

.trial-h{color:#6a4fbf;border-bottom-color:#ddd2f5}
.trial-head{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:12px}
.trial-state{font-weight:800;padding:4px 10px;border-radius:999px;background:#f2f4f8;color:var(--sub)}
.trial-state.good{background:#e7f8ef;color:#1f8a55}
.trial-state.mid{background:#fff6e2;color:#8a6b00}
.trial-state.bad{background:#fdeceb;color:#c0392b}
.trial-passed{color:#1f8a55;font-weight:700}
.trial-lock{color:var(--sub)}
.qz-preview{font-size:12.5px}
.trial-go{margin-top:4px;width:100%;min-height:44px;border:none;border-radius:10px;cursor:pointer;
  background:linear-gradient(135deg,#7b5cff,#5b34d6);color:#fff;font-size:14px;font-weight:800}
.qz-item{padding:12px 0;border-bottom:1px dashed #e9edf4}
.qz-q{font-size:13.5px;font-weight:700;color:var(--ink);line-height:1.6}
.qz-opts{display:flex;flex-direction:column;gap:6px;margin:8px 0}
.qz-opt{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:var(--sub);line-height:1.5;cursor:pointer;padding:6px 8px;border-radius:8px}
.qz-opt:hover{background:#f6f9ff}
.qz-opt input{margin-top:2px;flex:0 0 auto}
.qz-blank{width:100%;margin-top:8px;padding:10px 12px;font-size:16px;border:1px solid var(--line);border-radius:10px;outline:none}
.qz-blank:focus{border-color:var(--brand)}
.qz-res{margin-top:8px;font-size:12.5px;line-height:1.6}
.qz-res.ok{color:#1f8a55}
.qz-res.no{color:#c0392b}
.qz-exp{color:var(--sub);margin-top:4px}
.qz-sum{margin-top:12px;padding:10px 12px;border-radius:10px;font-size:13.5px;font-weight:700;line-height:1.6}
.qz-sum.ok{background:#e7f8ef;color:#1f8a55}
.qz-sum.no{background:#fdeceb;color:#c0392b}
.qz-sub{font-size:12px;font-weight:400;opacity:.85;margin-top:2px}

/* 问道试炼 ・ 作答反馈庆祝浮层 */
.qz-celebrate{position:fixed;inset:0;z-index:360;display:flex;align-items:center;justify-content:center;
  background:rgba(12,20,35,.5);backdrop-filter:blur(2px);padding:18px;animation:qzFade .25s ease}
@keyframes qzFade{from{opacity:0}to{opacity:1}}
.qz-cele-box{position:relative;width:100%;max-width:340px;background:#fff;border-radius:20px;
  padding:26px 22px 22px;text-align:center;box-shadow:0 22px 60px rgba(20,40,80,.35);
  animation:qzPop .42s cubic-bezier(.18,1.3,.4,1)}
@keyframes qzPop{0%{transform:scale(.6) translateY(18px);opacity:0}60%{transform:scale(1.06)}100%{transform:scale(1);opacity:1}}
.qz-cele-emoji{font-size:54px;line-height:1;margin-bottom:6px;animation:qzBob 1.1s ease-in-out infinite}
@keyframes qzBob{0%,100%{transform:translateY(0)}50%{transform:translateY(-7px)}}
.qz-cele-title{font-size:21px;font-weight:800;margin:2px 0 6px}
.qz-cele-box.win .qz-cele-title{color:#15a05a}
.qz-cele-box.win{background:linear-gradient(180deg,#ffffff 60%,#eafff2 100%);border:2px solid #b6f0cf}
.qz-cele-box.good .qz-cele-title{color:#e0992b}
.qz-cele-box.good{background:linear-gradient(180deg,#ffffff 60%,#fff6e8 100%);border:2px solid #f6dca6}
.qz-cele-desc{font-size:13.5px;color:var(--sub);line-height:1.65}
.qz-cele-sub{font-size:12px;color:var(--sub);opacity:.85;margin-top:6px}
.qz-cele-btn{margin-top:16px;display:inline-block;padding:11px 26px;border:none;border-radius:12px;
  font-size:15px;font-weight:700;color:#fff;cursor:pointer;background:var(--brand);box-shadow:0 8px 18px rgba(43,125,233,.35)}
.qz-cele-box.win .qz-cele-btn{background:#15a05a;box-shadow:0 8px 18px rgba(21,160,90,.35)}
.qz-cele-box.good .qz-cele-btn{background:#e0992b;box-shadow:0 8px 18px rgba(224,153,43,.35)}
.qz-cele-btn:active{transform:translateY(1px)}
/* 彩纸碎片 */
.qz-confetti{position:absolute;top:-10px;left:0;right:0;height:0;pointer-events:none;overflow:visible}
.qz-confetti i{position:absolute;top:6px;width:8px;height:12px;border-radius:2px;opacity:0;
  animation:qzFall 1.1s ease-in forwards}
@keyframes qzFall{0%{opacity:1;transform:translateY(0) rotate(0)}100%{opacity:0;transform:translateY(220px) rotate(540deg)}}


/* 相关仿真 */
.related{margin-top:16px}
.rel-h{font-size:14px;font-weight:800;color:var(--brand-d);margin-bottom:10px}
.rel-list{display:flex;gap:10px;flex-wrap:wrap}
.rel-chip{border:1px solid var(--line);background:#fff;border-radius:18px;padding:9px 16px;font-size:13px;cursor:pointer;color:var(--ink);min-height:40px}
.rel-chip:hover{border-color:var(--brand);color:var(--brand)}
footer{max-width:1360px;margin:0 auto;padding:24px var(--pad);color:var(--sub);font-size:12px;line-height:1.7;border-top:1px solid var(--line)}

/* 小程序 web-view 内底部栏（仅 ?mini=1 显示） */
#miniBar{position:fixed;left:0;right:0;bottom:0;z-index:999;display:flex;gap:10px;padding:8px 12px calc(8px + var(--safeB));
  background:rgba(255,255,255,.96);border-top:1px solid #e3e8f0;box-shadow:0 -2px 10px rgba(0,0,0,.06)}
#miniBar button{flex:1;border:none;border-radius:12px;padding:12px 0;font-size:15px;font-weight:700;cursor:pointer;min-height:var(--tap)}
#miniSupport{background:#2b7de9;color:#fff}
#miniShare{background:#fff;color:#7b5cff;border:1px solid #d9cfff}

/* 全局生动化层：学科主题场景 + 环境粒子 */
.vivid{position:relative;border-radius:14px;overflow:hidden;box-shadow:inset 0 0 0 1px rgba(255,255,255,.55),0 6px 18px rgba(20,40,80,.08)}
.vivid>canvas:not(.vivid-amb){position:relative;z-index:1;display:block}
.vivid-amb{position:absolute;left:0;top:0;z-index:0;pointer-events:none}
/* 知识卡片：生活应用 + 历史趣闻（放在仿真正下方，醒目易读） */
.know-card{margin:0;background:linear-gradient(135deg,#fffdf4 0%,#fff6e3 100%);border:1px solid #f2dfae;border-left:5px solid #f0b73f;border-radius:14px;padding:14px 16px 16px;box-shadow:0 5px 16px rgba(200,160,60,.12);animation:kcIn .28s ease}
.know-card:empty{display:none}
@keyframes kcIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.kc-head{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:800;color:#8a5d00;margin-bottom:12px;letter-spacing:.3px;cursor:pointer}
.kc-head::before{content:'';flex:none;width:11px;height:11px;border-radius:50%;background:#f0b73f;box-shadow:0 0 0 4px rgba(240,183,63,.22)}
.kc-body{display:flex;flex-direction:column;gap:12px}
.kc-row{display:flex;flex-direction:column;gap:6px;padding:0 0 0 12px;border-left:3px solid transparent}
.kc-row-apply{border-left-color:#a8cbf7}
.kc-row-story{border-left-color:#f5c391}
.kc-tag{align-self:flex-start;font-size:12px;font-weight:800;border-radius:999px;padding:3px 11px;letter-spacing:.5px}
.kc-apply{background:#dcecff;color:#14508f}
.kc-story{background:#ffe6cf;color:#a4580c}
.kc-text{font-size:14.5px;line-height:1.85;color:#3a3222}

/* ===== 经典题（数学板块知识卡片内）：真题出处 + 分步解答，解答默认折叠 ===== */
.cl-block{margin-top:14px;padding-top:12px;border-top:1px dashed #e6d9b8;display:flex;flex-direction:column;gap:9px}
.cl-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.cl-title{font-size:14px;font-weight:800;color:#8a5d00}
.cl-badge{font-size:11px;font-weight:800;border-radius:999px;padding:2px 9px;background:#d8f3e4;color:#146c48;letter-spacing:.5px}
.cl-badge.is-typical{background:#f0ead8;color:#8a6a12}
/* 经典题整块收起：只留标题行（含出处与折叠按钮） */
.cl-block.folded>*:not(.cl-head){display:none}
.cl-head .fold-btn{background:linear-gradient(135deg,#1a8a5a,#3fae7d);border-color:#1a8a5a;box-shadow:0 3px 10px rgba(26,138,90,.32)}
.cl-head .fold-btn:hover{box-shadow:0 5px 14px rgba(26,138,90,.45)}
.cl-src{font-size:12px;font-weight:700;color:#146c48;background:#eafaf1;border:1px solid #c7ead8;border-radius:8px;padding:3px 9px;line-height:1.5}
/* 经典题配图：内联 SVG，用 currentColor 以跟随深浅色主题 */
.cl-fig{display:flex;justify-content:center;background:#fbfdfc;border:1px solid #e2ede7;border-radius:10px;padding:10px}
.cl-fig svg{width:100%;height:auto;max-width:440px;display:block;color:#3a4a42}
.cl-prob{font-size:14px;line-height:1.85;color:#2f3a33;background:#fff;border:1px solid #d9e8de;border-radius:10px;padding:11px 13px}
.cl-toggle{align-self:flex-start;font-size:13px;font-weight:700;color:#146c48;background:#eafaf1;border:1px solid #bfe3d2;border-radius:999px;padding:7px 15px;min-height:36px;cursor:pointer}
.cl-toggle:hover{background:#d8f3e4}
.cl-sol{display:flex;flex-direction:column;gap:8px;background:#f7fbf8;border:1px solid #d9e8de;border-radius:10px;padding:11px 13px}
/* 必须显式声明：否则 .cl-sol 的 display:flex 会盖掉 UA 的 [hidden]{display:none}，导致解答默认就是展开的 */
.cl-sol[hidden]{display:none}
.cl-step{font-size:13.5px;line-height:1.85;color:#33413a;padding-left:16px;position:relative}
.cl-step::before{content:'▸';position:absolute;left:2px;color:#7ec8a9}
.cl-ans{font-size:13.5px;line-height:1.8;color:#146c48;font-weight:700;border-top:1px dashed #cfe3d8;padding-top:8px;margin-top:2px}
.cl-note{font-size:12.5px;line-height:1.75;color:#6b7a70}
@media(max-width:640px){.cl-prob{font-size:13.5px;padding:10px 11px}.cl-step{font-size:13px}}

/* 滑块统一加大触控区（手机/平板） */
input[type=range]{-webkit-appearance:none;appearance:none;background:transparent;height:28px}
input[type=range]::-webkit-slider-runnable-track{height:6px;border-radius:3px;background:#e3e9f2;border:1px solid #dbe2ec}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:24px;height:24px;margin-top:-10px;border-radius:50%;
  background:#fff;border:2px solid var(--brand);box-shadow:0 1px 4px rgba(20,60,120,.25);cursor:pointer}
input[type=range]::-moz-range-track{height:6px;border-radius:3px;background:#e3e9f2}
input[type=range]::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:#fff;border:2px solid var(--brand);cursor:pointer}
input[type=range]:disabled::-webkit-slider-thumb{border-color:#c3ccd8}
input[type=range]:disabled{opacity:.5}

/* =======================================================================
   一、平板横屏 / 桌面：只有宽度足够时才回到左右双栏
   ======================================================================= */
@media(min-width:760px){
  .sim{flex-direction:row;flex-wrap:wrap}
  .sim>.sim-view{order:0}
  .sim-panel{width:264px;flex:0 0 264px}
  .sim-view{flex:1;min-width:300px}
  .sim-readout{width:100%}
  :root{--cvh:clamp(280px,42vh,440px)}
}
@media(min-width:1024px){
  .sim-host{flex-direction:row;align-items:flex-start}
  .sim-host>.sim-col{flex:1;min-width:0}
  .teacher{width:320px;flex:0 0 320px}
  :root{--cvh:380px}
}

/* =======================================================================
   二、手机竖屏（≤759px）：单列 + 「画布吸顶」，向下滚着调参数时画面不跑出视野
   ======================================================================= */
@media(max-width:759px){
  :root{--cvh:clamp(200px,33vh,290px)}
  /* 只把画布卡片吸顶（它的容器是整个 .sim，足够高），参数区在其下方滚动 */
  .sim>.sim-view{position:sticky;top:calc(var(--headH) + 2px);z-index:12;
    box-shadow:0 8px 18px rgba(30,50,90,.10)}
  .sim-panel{gap:12px;padding:14px}
  .know-card{margin-top:2px}
  /* 参数行：标签+数值一行，滑块独占下一行，手指好拖 */
  .ctrl{display:grid;grid-template-columns:1fr auto auto;grid-template-areas:"lb va un" "sl sl sl";
        align-items:center;gap:2px 8px;padding:3px 0;min-height:56px}
  .ctrl>label{grid-area:lb;width:auto;flex:none;font-size:13.5px;color:var(--ink);font-weight:600}
  .ctrl>b{grid-area:va;justify-self:end;font-size:14px}
  .ctrl>i{grid-area:un;width:auto;font-size:12px}
  .ctrl>input[type=range]{grid-area:sl;width:100%;min-width:0}
  .ctrl>select,.ctrl>input[type=text],.ctrl>input[type=number]{grid-column:2/-1;width:auto;justify-self:stretch}
  .ctrl>input[type=checkbox]{grid-area:va}
  .btns{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px}
  .btns button{width:100%}
  #simTitle{font-size:19px}
}

/* 平板竖屏（760~1023px）：双栏布局，长面板默认折叠 */
@media(min-width:760px) and (max-width:1023px){
  .ctrl{display:grid;grid-template-columns:1fr auto auto;grid-template-areas:"lb va un" "sl sl sl";
        align-items:center;gap:2px 8px;padding:3px 0;min-height:52px}
  .ctrl>label{grid-area:lb;width:auto;flex:none;font-size:13.5px;font-weight:600;color:var(--ink)}
  .ctrl>b{grid-area:va;justify-self:end;font-size:14px}
  .ctrl>i{grid-area:un;width:auto}
  .ctrl>input[type=range]{grid-area:sl;width:100%;min-width:0}
  .ctrl>select,.ctrl>input[type=text],.ctrl>input[type=number]{grid-column:2/-1;justify-self:stretch}
  .btns{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:10px}
  .btns button{width:100%}
}

/* =======================================================================
   三、手机（≤640px）：单列 / 双列卡片、更紧凑的头部
   ======================================================================= */
@media(max-width:640px){
  :root{--headH:92px;--pad:12px;--cvh:clamp(210px,34vh,300px)}
  .bar{flex-wrap:wrap;padding:8px 12px;gap:6px 10px;align-items:center}
  .logo{width:28px;height:28px}
  .brand{font-size:16px}
  .brand small{display:none}
  .search{flex:1 1 100%;max-width:none;margin-left:0;order:5}
  .search input{padding:8px 12px;font-size:16px}
  .role-btn{order:4;margin-left:auto;font-size:12px;padding:7px 11px}
  .audio-btn{order:3;margin-left:0}
  .export-row{gap:10px}
  .export-btns{width:100%}
  .export-btns .sheet-btn{flex:1;min-height:40px}
  /* 标签横向滑动，不换行占位 */
  .tabs{flex-wrap:nowrap;overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;scrollbar-width:none;
        margin:8px -12px 10px;padding:2px 12px}
  .tabs::-webkit-scrollbar{display:none}
  .tab{flex:0 0 auto;min-height:38px;padding:8px 14px}
  .filters{gap:8px;margin-bottom:12px}
  .filters select{padding:8px 12px;font-size:14px;min-height:38px}
  .fcount{width:100%;margin-left:0;order:9}
  /* 两列卡片，缩略图压扁，一屏能看到更多 */
  .grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .card{padding:10px;border-radius:12px}
  .thumb{height:86px;border-radius:8px;margin-bottom:6px;font-size:22px}
  .card .fav{width:30px;height:30px;top:6px;right:6px;font-size:15px}
  .badge-new{top:6px;left:6px;font-size:10px}
  .card-sub{font-size:10.5px;line-height:1.35}
  .card-title{font-size:14.5px;line-height:1.3}
  .card-desc{font-size:11.5px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .card-chap{font-size:10px;padding:2px 6px}
  #simTitle{font-size:19px}
  .dhead{flex-wrap:wrap;gap:8px}
  .sim-tip{font-size:12.5px;padding:8px 12px}
  .sim-readout{font-size:14px;padding:9px 12px}
  .teacher{padding:12px}
  .task{font-size:12.5px}
  .rel-chip{padding:8px 14px;font-size:12.5px}
  footer{display:none}                 /* 手机屏幕宝贵，页脚隐去 */
  .kc-text{font-size:14px;line-height:1.8}
}

/* 极窄屏（≤360px）：单列，避免卡片被挤成一条 */
@media(max-width:360px){
  .grid{grid-template-columns:1fr}
  .thumb{height:110px}
}

/* =======================================================================
   四、横屏（手机/平板横过来）：画面吃满高度，避免上下滚动
   ======================================================================= */
@media(max-height:560px) and (orientation:landscape){
  :root{--cvh:min(68vh,400px)}
  .sim>.sim-view{position:static}
  .bar{padding:6px 12px}
  .brand small{display:none}
  main{padding:10px var(--pad) 24px}
  /* 横屏高度吃紧：把标题区压扁，尽量把画面留出来 */
  #simTitle{font-size:18px}
  .dhead h2{font-size:18px}
  .meta{font-size:12px;margin-bottom:4px}
  #back{padding:6px 12px;min-height:34px;margin-bottom:6px;font-size:13px}
  .sim-tip{font-size:12px;padding:6px 10px;margin-bottom:8px;line-height:1.5;
    max-height:46px;overflow:hidden}
  .sim-tip::before{font-size:11px}
  footer{display:none}
}

/* =======================================================================
   五、小程序容器（?mini=1）：隐藏重复的顶部/返回/页脚，留出底部栏空间
   ======================================================================= */
body.mini-app header{display:none}
body.mini-app{--headH:0px}
body.mini-app #back{display:none}
/* 小程序内也展示「相关仿真」：用户可在当前知识点直接跳到相关知识点，无需返回首页。
   原为 display:none（当初为省小屏空间），但导致小程序用户无法就近切换知识点，现放开。 */
body.mini-app #related{display:block}
body.mini-app footer{display:none}
body.mini-app main{padding-top:10px;padding-bottom:calc(68px + var(--safeB))}
body.mini-app .sim>.sim-view{top:0}
body.mini-app.cv-fs main{padding-bottom:0}

/* 深色模式：跟随系统，夜里做题不刺眼（微信/浏览器自动切换） */
@media(prefers-color-scheme:dark){
  body{background:#12161d;color:#e6ebf2}
  header{background:rgba(20,25,33,.9);border-bottom-color:#232a36}
  .card,.sim-panel,.sim-view,.teacher,.task,.rel-chip,#back,.favbig{background:#1a2029;border-color:#28303c}
  .card-title,.task-q,.dhead h2{color:#f0f4fa}
  .card-desc,.card-sub,.meta,.teacher-row{color:#93a0b4}
  .grid{color:#e6ebf2}
  .tab{background:#1a2029;border-color:#28303c;color:#a8b6c9}
  .filters select{background:#1a2029;border-color:#28303c;color:#e6ebf2}
  .sim-tip{background:linear-gradient(90deg,#16233a,#1a2438);border-color:#2b3a55;border-left-color:var(--brand);color:#bcd0f0}
  .sim-readout{background:#152238;border-color:#274066;color:#bcd0f0}
  .know-card{background:linear-gradient(135deg,#221d10,#2a2313);border-color:#4a3c18}
  .kc-text{color:#e8dcc4}
  .cl-block{border-top-color:#4a3c18}
  .cl-title{color:#f0c860}
  .cl-badge{background:#1d3a2c;color:#7fd3a8}
  .cl-badge.is-typical{background:#3a3320;color:#d8c48a}
  .cl-src{color:#7fd3a8;background:#16281f;border-color:#2c4a3a}
  .cl-fig{background:#141a17;border-color:#27332c}
  .cl-fig svg{color:#b9c9c0}
  .cl-prob{background:#1a2029;border-color:#2b3340;color:#c9d6cf}
  .cl-toggle{color:#7fd3a8;background:#16281f;border-color:#2c4a3a}
  .cl-toggle:hover{background:#1d3a2c}
  .cl-sol{background:#17201b;border-color:#2b3340}
  .cl-step{color:#b7c6bd}
  .cl-ans{color:#7fd3a8;border-top-color:#2c4a3a}
  .cl-note{color:#8b9a90}
  .teacher{background:#1f1d15;border-color:#3a3320}
  .task{background:#1d232d;border-color:#2b3340}
  footer{border-color:#232a36}
}

/* ===== 用户资料：微信登录 + 昵称/头像（2026-10-15）===== */
.me-avatar,.mep-avatar,.pf-avatar,.ue-avatar{flex:0 0 auto;border-radius:50%;object-fit:cover;overflow:hidden;display:inline-flex;align-items:center;justify-content:center;background:#e8eefc;border:1px solid #dbe6fb}
.me-avatar{width:28px;height:28px}
.av-emoji{font-size:20px;line-height:1}
.me-avatar.av-emoji{font-size:16px}
.me-chip.has-user{flex-direction:row;align-items:center;gap:8px;padding:3px 10px 3px 4px;background:#fff;border:1px solid #dbe6fb;border-radius:999px}
.me-chip.has-user .me-id{display:flex;flex-direction:column;line-height:1.25}
.me-chip.has-user .me-id b{font-size:13px;color:var(--ink)}
.me-chip.has-user .me-id i{font-size:11px;font-style:normal;color:var(--sub);white-space:nowrap}
.mep-head{display:flex;align-items:center;gap:10px;width:100%;padding:2px 0 10px;border-bottom:1px solid #e3ebfa;margin-bottom:4px}
.mep-avatar{width:38px;height:38px}
.mep-id{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.mep-name{font-size:15px;color:var(--ink);font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:38vw}
.mep-sub{font-size:11px;color:var(--sub)}
.mep-edit{margin-left:auto;font-size:12px;padding:5px 12px;border:1px solid #cfd9ec;border-radius:999px;background:#fff;color:#2b6fd6;cursor:pointer}
.mep-login{flex-wrap:wrap;border-bottom:none;padding-bottom:0;margin-bottom:6px}
.mep-loginbtn{font-size:13px;padding:8px 16px;border:none;border-radius:999px;background:linear-gradient(135deg,#1aad19,#0f8a0e);color:#fff;font-weight:700;cursor:pointer}
.mep-login .mep-sub{margin-left:8px}
.pf-head{display:flex;align-items:center;gap:12px;margin:0 0 12px}
.pf-avatar{width:52px;height:52px}
.pf-id{display:flex;flex-direction:column;line-height:1.2}
.pf-id b{font-size:16px;color:var(--ink)}
.pf-sub{font-size:11px;color:var(--sub)}
.pf-editbtns{margin-left:auto;display:flex;gap:8px;flex-wrap:wrap}
.pf-editbtns button{font-size:12px;padding:6px 12px;border:1px solid #cfd9ec;border-radius:999px;background:#fff;color:#2b6fd6;cursor:pointer}
.pf-login{flex-wrap:wrap;gap:10px}
.ue-head{display:flex;align-items:center;gap:12px;margin:8px 0 12px}
.ue-avatar{width:56px;height:56px}
.ue-avbtn{font-size:13px;padding:8px 14px;border:1px solid #cfd9ec;border-radius:999px;background:#fff;color:#2b6fd6;cursor:pointer}
.av-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin:10px 0}
.av-opt{width:42px;height:42px;border-radius:50%;border:1px solid #e3e8f2;font-size:22px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center}
.av-upload{display:block;text-align:center;padding:10px;border:1px dashed #cfd9ec;border-radius:10px;color:#2b6fd6;cursor:pointer;margin:6px 0;font-size:13px}
.av-wx{display:block;width:100%;padding:10px;border:none;border-radius:10px;background:linear-gradient(135deg,#1aad19,#0f8a0e);color:#fff;font-weight:700;cursor:pointer;margin:6px 0;font-size:13px}

/* ============ 首页 Pad 使用建议提示 ============ */
.pad-tip{display:flex;align-items:center;gap:8px;margin:10px 0 14px;padding:10px 12px;background:linear-gradient(135deg,#eaf2ff,#f4f8ff);border:1px solid #cfe0ff;border-left:4px solid var(--brand);border-radius:10px;color:#23406b;font-size:13.5px;line-height:1.45}
.pad-tip-tx{flex:1;min-width:0}
.pad-tip-x{flex:0 0 auto;width:26px;height:26px;margin:-2px -4px -2px 0;border:none;background:transparent;color:#5a6b85;font-size:20px;line-height:1;cursor:pointer;border-radius:50%}
.pad-tip-x:active{background:rgba(20,40,80,.08)}

/* ============ 交互按钮「已生效」态：淡蓝底，区别于未生效按钮 ============ */
.btns button.on:not(.primary),.sim-panel button.on:not(.primary){background:#dbebff;border-color:#8ab6f5;color:#12507f;font-weight:600}
button.primary.on{background:var(--brand-d);box-shadow:0 0 0 2px rgba(43,125,233,.28)}

/* ============ 年级/学校弹窗：学校必填，固定前缀嵌在输入框内 ============ */
.grade-school-field{display:flex;align-items:center;width:100%;margin:10px 0 2px;padding:0 12px;border:1px solid var(--line);border-radius:10px;background:#fff;box-sizing:border-box;min-height:46px}
.grade-school-field:focus-within{border-color:var(--brand)}
.grade-school-field .gs-label{flex:0 0 auto;font-size:15px;color:var(--ink);white-space:nowrap;-webkit-user-select:none;user-select:none}
.modal-box .grade-school-field .gs-input{flex:1 1 auto;min-width:0;width:auto;padding:12px 0;margin:0;border:0;outline:none;background:transparent;font-size:15px;border-radius:0;box-shadow:none}
.modal-box .grade-school-field .gs-input:focus{border:0}
.grade-opt.on{border-color:var(--brand);color:var(--brand);background:#eaf2ff;box-shadow:inset 0 0 0 1px var(--brand)}
.grade-hint{min-height:16px;font-size:12px;line-height:16px;color:#e4453b;margin:3px 0 0}