/* ============ GESP 组卷台 ============ */
:root{
  --bg:#f4f6fa;
  --panel:#ffffff;
  --ink:#141b26;
  --ink2:#3b4657;
  --mut:#77839a;
  --line:#e5eaf2;
  --line2:#eef1f7;
  --brand:#3455d6;
  --brand-soft:#eef2ff;
  --brand-deep:#243a9e;
  --ok:#12996b;
  --warn:#b5761a;
  --bad:#c0392b;
  --radius:14px;
  --shadow:0 1px 2px rgba(20,27,38,.04),0 8px 24px -16px rgba(20,27,38,.18);
  --shadow-lg:0 24px 60px -24px rgba(20,27,38,.35);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:14px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;
  -webkit-font-smoothing:antialiased;
}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#d3dae6;border-radius:8px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:#bcc6d6;background-clip:content-box}
::-webkit-scrollbar-track{background:transparent}
.hidden{display:none!important}

/* ---------- 顶栏 ---------- */
.topbar{
  position:sticky;top:0;z-index:40;height:60px;display:flex;align-items:center;gap:18px;
  padding:0 20px;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:11px;min-width:0}
.logo{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;flex:none;
  background:linear-gradient(145deg,#4a63e8,#2b3fb0);color:#fff;font-weight:800;font-size:16px;
  box-shadow:0 6px 16px -8px rgba(52,85,214,.9);letter-spacing:.5px;
}
.brand h1{margin:0;font-size:15.5px;font-weight:700;letter-spacing:.2px;white-space:nowrap}
.brand p{margin:1px 0 0;font-size:11.5px;color:var(--mut);white-space:nowrap}
.nav{display:flex;gap:4px;margin-left:8px;background:#f1f4f9;padding:3px;border-radius:10px}
.nav button{
  border:0;background:transparent;padding:6px 15px;border-radius:8px;font-size:13.5px;color:var(--ink2);
  font-weight:500;transition:.15s;
}
.nav button.on{background:#fff;color:var(--brand);font-weight:700;box-shadow:0 1px 3px rgba(20,27,38,.1)}
.top-actions{margin-left:auto;display:flex;align-items:center;gap:9px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  height:36px;padding:0 14px;border-radius:9px;border:1px solid var(--line);
  background:#fff;color:var(--ink2);font-size:13.5px;font-weight:500;transition:.16s;white-space:nowrap;
}
.btn:hover{border-color:#cfd8e8;background:#fafbfe;color:var(--ink)}
.btn:active{transform:translateY(1px)}
.btn svg{width:16px;height:16px;flex:none}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 6px 16px -10px rgba(52,85,214,.9)}
.btn-primary:hover{background:var(--brand-deep);border-color:var(--brand-deep);color:#fff}
.btn-sm{height:30px;padding:0 10px;font-size:12.5px;border-radius:8px}
.btn-danger{color:var(--bad);border-color:#f0d5d2}
.btn-danger:hover{background:#fdf4f3;border-color:#e8bdb7}
.btn[disabled]{opacity:.45;pointer-events:none}
.pill{
  display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;padding:0 6px;
  border-radius:99px;background:rgba(255,255,255,.24);font-size:11.5px;font-weight:700
}

/* ---------- 布局 ---------- */
.view{display:flex;height:calc(100vh - 60px);overflow:hidden}
.sidebar{
  width:270px;flex:none;background:var(--panel);border-right:1px solid var(--line);
  overflow-y:auto;padding:16px 14px 40px;
}
.sidebar .fgroup{margin-bottom:17px}
.fgroup .ftitle{
  display:flex;align-items:center;justify-content:space-between;gap:6px;
  font-size:11.5px;font-weight:700;letter-spacing:.06em;color:var(--mut);
  margin-bottom:8px;padding:0 2px;
}
.fgroup .ftitle button{border:0;background:none;color:var(--brand);font-size:11.5px;padding:0;letter-spacing:0;font-weight:600}
.hashint{font-weight:400;letter-spacing:0;font-size:11px}
.hashint b{color:var(--ink2)}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{
  border:1px solid var(--line);background:#fff;color:var(--ink2);
  padding:4px 10px;border-radius:99px;font-size:12.5px;transition:.14s;line-height:1.4;
}
.chip:hover{border-color:#c8d3e8;background:#f8faff}
.chip.on{background:var(--brand-soft);border-color:#b9c6f5;color:var(--brand-deep);font-weight:600}
.chip .n{color:var(--mut);font-size:11px;margin-left:3px;font-weight:400}
.chip.on .n{color:#6d80d8}
.chip.more{color:var(--brand);border-style:dashed}
.searchbox{position:relative;margin-bottom:15px}
.searchbox input{
  width:100%;height:38px;border-radius:10px;border:1px solid var(--line);background:#f8fafd;
  padding:0 34px 0 34px;font-size:13.5px;outline:none;transition:.16s;
}
.searchbox input:focus{border-color:#a9bcf3;background:#fff;box-shadow:0 0 0 3px rgba(52,85,214,.1)}
.searchbox .ic{position:absolute;left:11px;top:11px;width:16px;height:16px;color:var(--mut)}
.searchbox .clear{position:absolute;right:8px;top:8px;border:0;background:none;color:var(--mut);font-size:15px;padding:2px 4px}
.side-foot{font-size:11.5px;color:var(--mut);line-height:1.7;border-top:1px dashed var(--line);padding-top:12px}

.content{flex:1;display:flex;flex-direction:column;min-width:0;overflow:hidden}
.toolbar{
  display:flex;align-items:center;gap:9px;padding:12px 18px;border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.72);backdrop-filter:blur(8px);flex-wrap:wrap;
}
.toolbar .stat{font-size:13px;color:var(--mut)}
.toolbar .stat b{color:var(--ink);font-size:15px;font-weight:800;font-variant-numeric:tabular-nums}
.toolbar .spacer{flex:1}
.sel{
  height:32px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:0 8px;font-size:12.5px;
  color:var(--ink2);outline:none;
}
.sel:focus{border-color:#a9bcf3}
.cards{
  flex:1;overflow-y:auto;padding:16px 18px 90px;
  display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:12px;align-content:start;
}
.card{
  position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:13px 14px 11px;box-shadow:var(--shadow);transition:.16s;display:flex;flex-direction:column;
}
.card:hover{border-color:#cdd8ee;box-shadow:0 2px 4px rgba(20,27,38,.04),0 16px 32px -22px rgba(20,27,38,.35);transform:translateY(-1px)}
.card.picked{border-color:#b3c2f3;background:linear-gradient(180deg,#f8faff,#fff)}
.card.picked:before{
  content:"";position:absolute;left:-1px;top:12px;bottom:12px;width:3px;border-radius:0 3px 3px 0;background:var(--brand);
}
.card-h{display:flex;align-items:flex-start;gap:7px;margin-bottom:6px}
.card-idx{font-size:11px;color:var(--mut);font-variant-numeric:tabular-nums;padding-top:3px;min-width:22px;flex:none}
.card-title{
  font-size:14.5px;font-weight:700;line-height:1.5;margin:0;flex:1;min-width:0;
  overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
}
.card-title.clamp1{-webkit-line-clamp:1}
.card-tags{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:7px;padding-left:29px}
.tag{font-size:11.5px;padding:1px 7px;border-radius:6px;background:#f2f5fa;color:var(--ink2);white-space:nowrap;border:1px solid transparent}
.tag.lv{background:#eef2ff;color:#3a4fbd;font-weight:600}
.tag.d0{background:#eaf7f1;color:#0f7a56}
.tag.d1{background:#fdf4e7;color:#96620f}
.tag.d2{background:#fceeec;color:#a83a2c}
.tag.src{background:#f4f5f7;color:#5d6879}
.tag.tp{background:#f0f5fd;color:#3d6bb5}
.card-desc{
  font-size:12.5px;color:var(--mut);line-height:1.65;margin:0 0 9px;padding-left:29px;
  overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
}
.optline{
  font-size:12px;color:#5c6879;line-height:1.6;padding-left:29px;margin:-2px 0 9px;
  overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
}
.optline b{color:#33415a;font-weight:700;margin-right:2px}
.card-f{display:flex;align-items:center;gap:6px;padding-left:29px;margin-top:auto}
.card-f .kp{
  font-size:11.5px;color:#5a6a86;background:#f6f8fc;border:1px dashed #dde3ee;border-radius:6px;padding:1px 6px;
  max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.card-f .spacer{flex:1}
.mini{
  height:28px;padding:0 10px;border-radius:7px;border:1px solid var(--line);background:#fff;font-size:12px;color:var(--ink2);
  transition:.14s;
}
.mini:hover{border-color:#c3d0ea;background:#f8faff}
.mini.primary{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.mini.primary:hover{background:var(--brand-deep)}
.mini.ghost{border-color:transparent;background:transparent;color:var(--mut)}
.mini.ghost:hover{background:#f1f4fa;color:var(--ink)}
.mini.picked{background:#eaf7f1;border-color:#bde5d2;color:#0f7a56;font-weight:600}
.sol-dot{width:5px;height:5px;border-radius:99px;background:#38b48b;display:inline-block;margin-right:4px;vertical-align:middle}
.empty{grid-column:1/-1;text-align:center;padding:70px 20px;color:var(--mut);font-size:14px}
.empty b{display:block;font-size:16px;color:var(--ink2);margin-bottom:6px}
.loading{display:flex;align-items:center;justify-content:center;gap:10px;color:var(--mut);font-size:13px;padding:60px}
.spin{width:16px;height:16px;border:2px solid #d8e0ef;border-top-color:var(--brand);border-radius:50%;animation:sp .8s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}

.pager{display:flex;align-items:center;justify-content:center;gap:6px;padding:6px 18px 14px;border-top:1px solid var(--line2);background:#fff}
.pager button{
  min-width:32px;height:32px;padding:0 9px;border-radius:8px;border:1px solid var(--line);background:#fff;
  font-size:13px;color:var(--ink2);font-variant-numeric:tabular-nums;
}
.pager button:hover:not([disabled]){border-color:#c3d0ea;background:#f8faff}
.pager button.on{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:700}
.pager button[disabled]{opacity:.4;cursor:default}
.pager .info{font-size:12.5px;color:var(--mut);margin:0 6px}

/* ---------- 抽屉 ---------- */
.backdrop{position:fixed;inset:0;background:rgba(18,26,40,.42);z-index:60;opacity:0;pointer-events:none;transition:.2s;backdrop-filter:blur(2px)}
.backdrop.on{opacity:1;pointer-events:auto}
.sheetpanel{
  position:fixed;top:0;right:0;bottom:0;width:470px;max-width:94vw;background:#fff;z-index:70;
  transform:translateX(100%);transition:transform .26s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;box-shadow:var(--shadow-lg);
}
.sheetpanel.on{transform:none}
.sp-h{padding:16px 18px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px}
.sp-h h3{margin:0;font-size:16px;font-weight:700}
.sp-h .spacer{flex:1}
.sp-b{flex:1;overflow-y:auto;padding:14px 16px}
.sp-f{border-top:1px solid var(--line);padding:12px 16px;display:flex;gap:8px}

/* ---------- 弹窗 ---------- */
.modal{position:fixed;inset:0;z-index:80;display:flex;align-items:center;justify-content:center;padding:28px}
.modal .m-bg{z-index:0}
.modal .m-panel{
  position:relative;z-index:2;width:min(880px,100%);max-height:100%;background:#fff;border-radius:18px;
  box-shadow:var(--shadow-lg);display:flex;flex-direction:column;overflow:hidden;
  animation:pop .22s cubic-bezier(.2,.8,.3,1);
}
@keyframes pop{from{opacity:0;transform:translateY(10px) scale(.98)}to{opacity:1;transform:none}}
.m-h{padding:16px 20px 12px;border-bottom:1px solid var(--line);display:flex;gap:12px;align-items:flex-start}
.m-h h2{margin:0;font-size:19px;font-weight:800;line-height:1.4}
.m-h .sub{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.m-h .x{margin-left:auto;flex:none}
.m-tabs{display:flex;gap:2px;padding:0 20px;border-bottom:1px solid var(--line);background:#fff}
.m-tabs button{border:0;background:none;padding:11px 14px;font-size:13.5px;color:var(--mut);border-bottom:2px solid transparent;font-weight:500}
.m-tabs button.on{color:var(--brand);border-bottom-color:var(--brand);font-weight:700}
.m-b{overflow-y:auto;padding:18px 24px 26px;flex:1;background:#fff}
.m-f{border-top:1px solid var(--line);padding:11px 20px;display:flex;align-items:center;gap:9px;background:#fcfdff}
.iconbtn{
  width:26px;height:26px;border-radius:7px;border:1px solid transparent;background:transparent;color:#98a3b6;
  display:grid;place-items:center;transition:.14s;
}
.iconbtn:hover{background:#f2f5fa;color:var(--ink2);border-color:var(--line)}
.iconbtn.del:hover{background:#fdf3f2;color:var(--bad);border-color:#f2d8d4}
.iconbtn svg{width:14px;height:14px}
.iconbtn.x{width:32px;height:32px}
.iconbtn.x svg{width:18px;height:18px}

.kpitem{
  display:flex;align-items:center;gap:9px;padding:6px 9px;border-radius:8px;font-size:13px;cursor:pointer;
  border:1px solid transparent;
}
.kpitem:hover{background:#f6f8fd}
.kpitem.on{background:var(--brand-soft);border-color:#d3dcfa;color:var(--brand-deep);font-weight:600}
.kpitem .cb{width:15px;height:15px;border-radius:4px;border:1.5px solid #ccd5e6;flex:none;display:grid;place-items:center}
.kpitem.on .cb{background:var(--brand);border-color:var(--brand)}
.kpitem.on .cb:after{content:"";width:7px;height:4px;border-left:2px solid #fff;border-bottom:2px solid #fff;transform:rotate(-45deg) translateY(-1px)}
.kpitem .cnt{margin-left:auto;font-size:11.5px;color:var(--mut);font-weight:400}

/* ---------- 题面 ---------- */
.prose{font-size:14.5px;line-height:1.85;color:var(--ink);word-break:break-word}
.prose p{margin:0 0 10px}
.prose .nb,.qbody .nb{white-space:nowrap}
.prose h2{font-size:16px;margin:18px 0 8px;font-weight:800}
.prose h3{font-size:15px;margin:16px 0 7px;font-weight:700}
.prose h4{font-size:14px;margin:13px 0 6px;font-weight:700;color:var(--ink2)}
.prose ul,.prose ol{margin:6px 0 10px;padding-left:22px}
.prose li{margin:3px 0}
.prose code{
  font-family:Consolas,"Cascadia Mono",Menlo,monospace;font-size:12.8px;background:#f1f4f9;
  border:1px solid #e5eaf2;border-radius:5px;padding:.5px 5px;color:#b03a5b;
}
.prose pre{background:#1f2530;color:#e6ebf5;border-radius:10px;padding:12px 14px;overflow:auto;margin:8px 0 12px;font-size:12.8px;line-height:1.7}
.prose pre code{background:none;border:0;color:inherit;padding:0;font-size:12.8px}
.prose blockquote{margin:8px 0;padding:6px 12px;border-left:3px solid #d8e0ef;color:var(--ink2);background:#fafbfe}
.prose table{border-collapse:collapse;margin:8px 0;font-size:13px}
.prose th,.prose td{border:1px solid var(--line);padding:5px 9px}
.prose th{background:#f6f8fc;font-weight:700}
.prose strong,.prose b{font-weight:700}
.prose a{color:var(--brand);text-decoration:none;border-bottom:1px solid #c9d5f8}
.prose hr{border:0;border-top:1px dashed var(--line);margin:14px 0}

.qbody .sect{margin-top:16px}
.qbody .sect > .lb{font-size:12px;font-weight:800;letter-spacing:.08em;color:#8b97ac;margin-bottom:5px}
.qbody .sect:first-child{margin-top:0}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:8px}
.io{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fbfcfe}
.io .hd{font-size:11.5px;font-weight:700;color:#6b7789;padding:5px 10px;background:#f2f5fa;border-bottom:1px solid var(--line);letter-spacing:.04em}
.io pre{margin:0;background:none;color:var(--ink);padding:9px 11px;border-radius:0;font-size:12.8px;max-height:280px;overflow:auto;white-space:pre-wrap;word-break:break-all}
.meta-line{display:flex;gap:14px;font-size:12px;color:var(--mut);margin-bottom:14px;flex-wrap:wrap}
.opts-list{margin:16px 0 0}
.opt-row{
  display:flex;gap:10px;align-items:flex-start;padding:8px 12px;border:1px solid var(--line);border-radius:10px;
  margin-bottom:8px;font-size:14px;line-height:1.7;background:#fff;
}
.opt-row .ol{
  width:22px;height:22px;border-radius:50%;background:#f2f5fa;color:#5d6b83;display:grid;place-items:center;
  font-size:12px;font-weight:700;flex:none;margin-top:1px;
}
.opt-row.right{border-color:#bde5d2;background:#f6fdf9}
.opt-row.right .ol{background:#12996b;color:#fff}
.ansline{
  display:flex;align-items:center;gap:10px;margin-top:16px;padding:10px 14px;border-radius:10px;
  background:#f0faf5;border:1px solid #c6ecda;font-size:13.5px;color:#0f7a56;
}
.ansline b{font-size:16px;font-weight:800}

/* ---------- 组卷 ---------- */
#viewPaper{display:block;overflow-y:auto;height:calc(100vh - 60px);background:var(--bg)}
.paper-wrap{max-width:1180px;margin:0 auto;padding:22px 20px 110px;display:grid;grid-template-columns:342px 1fr;gap:18px;align-items:start}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.pcard > .ph{padding:13px 16px;border-bottom:1px solid var(--line2);display:flex;align-items:center;gap:8px}
.pcard > .ph h3{margin:0;font-size:14px;font-weight:800}
.pcard > .ph .spacer{flex:1}
.pcard > .pb{padding:14px 16px}
.field{margin-bottom:12px}
.field label{display:block;font-size:12px;font-weight:600;color:var(--mut);margin-bottom:5px}
.field input[type=text],.field input[type=number],.field textarea,.field select{
  width:100%;border:1px solid var(--line);border-radius:9px;padding:8px 10px;font-size:13.5px;background:#fbfcfe;
  outline:none;transition:.15s;
}
.field input:focus,.field textarea:focus,.field select:focus{border-color:#a9bcf3;background:#fff;box-shadow:0 0 0 3px rgba(52,85,214,.09)}
.field textarea{resize:vertical;min-height:86px;line-height:1.65}
.field .row2{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.switch{display:flex;align-items:center;gap:9px;padding:6px 0;font-size:13px;color:var(--ink2);cursor:pointer}
.switch input{appearance:none;width:36px;height:20px;border-radius:99px;background:#d7deea;position:relative;transition:.18s;flex:none;margin:0;cursor:pointer}
.switch input:before{content:"";position:absolute;width:16px;height:16px;border-radius:99px;background:#fff;top:2px;left:2px;transition:.18s;box-shadow:0 1px 2px rgba(0,0,0,.2)}
.switch input:checked{background:var(--brand)}
.switch input:checked:before{transform:translateX(16px)}
.statbox{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.statbox .sb{background:#f7f9fd;border:1px solid var(--line2);border-radius:10px;padding:9px 11px}
.statbox .sb b{display:block;font-size:19px;font-weight:800;font-variant-numeric:tabular-nums;line-height:1.2}
.statbox .sb span{font-size:11.5px;color:var(--mut)}
.lvbar{display:flex;height:7px;border-radius:99px;overflow:hidden;background:#eef1f7;margin-top:9px}
.lvbar i{display:block;height:100%}
.lvlegend{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px;font-size:11.5px;color:var(--mut)}
.lvlegend span{display:flex;align-items:center;gap:4px}
.lvlegend i{width:7px;height:7px;border-radius:2px;display:block}

.qlist{display:flex;flex-direction:column;gap:7px}
.qrow{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:11px;padding:8px 10px;transition:.14s}
.qrow:hover{border-color:#cfd9ee}
.qrow.dragging{opacity:.45;border-style:dashed}
.qrow.over{border-color:var(--brand);box-shadow:0 0 0 3px rgba(52,85,214,.1)}
.qrow .handle{cursor:grab;color:#b8c2d3;width:14px;flex:none;display:grid;place-items:center}
.qrow .no{width:26px;height:26px;border-radius:8px;background:#f2f5fb;color:#5c6b83;display:grid;place-items:center;font-size:12px;font-weight:700;flex:none;font-variant-numeric:tabular-nums}
.qrow .ttl{flex:1;min-width:0}
.qrow .ttl b{display:block;font-size:13.5px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.qrow .ttl .mt{font-size:11.5px;color:var(--mut);display:flex;gap:6px;margin-top:1px;overflow:hidden;white-space:nowrap}
.qrow .sc{width:54px;border:1px solid var(--line);border-radius:8px;padding:4px 6px;text-align:center;font-size:13px;background:#fbfcfe;outline:none;font-variant-numeric:tabular-nums;flex:none}
.qrow .sc:focus{border-color:#a9bcf3;background:#fff}
.qrow .ops{display:flex;gap:3px;flex:none}
.orderbar{display:flex;gap:6px;flex-wrap:wrap;align-items:center;margin-bottom:10px}
.orderbar .lbl{font-size:12px;color:var(--mut);margin-right:2px}
.typebar{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.tchip{font-size:12px;background:#f5f7fc;border:1px solid var(--line);border-radius:99px;padding:3px 9px;color:var(--ink2)}
.tchip b{color:var(--brand-deep)}

.stickybar{
  position:fixed;left:0;right:0;bottom:0;z-index:35;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);
  border-top:1px solid var(--line);padding:10px 20px;display:flex;align-items:center;gap:9px;
}
.stickybar .sum{font-size:13px;color:var(--mut)}
.stickybar .sum b{color:var(--ink);font-size:16px;font-weight:800}
.stickybar .spacer{flex:1}

/* ---------- 试卷预览 / 打印 ---------- */
.preview-layer{position:fixed;inset:0;z-index:90;background:#e8ecf3;overflow-y:auto;padding:0 0 70px}
.pv-bar{
  position:sticky;top:0;z-index:5;background:#fff;border-bottom:1px solid var(--line);padding:10px 18px;
  display:flex;align-items:center;gap:9px;box-shadow:0 2px 10px -8px rgba(0,0,0,.3);
}
.pv-bar .t{font-size:13.5px;font-weight:700}
.pv-bar .hint{font-size:12px;color:var(--mut)}
.sheet{
  width:210mm;min-height:297mm;margin:22px auto;background:#fff;padding:18mm 16mm 16mm;
  box-shadow:0 10px 40px -18px rgba(20,27,38,.4);color:#111;font-size:12.5pt;line-height:1.75;
}
.sheet .paper-head{text-align:center;border-bottom:2px solid #1a1f2b;padding-bottom:10px}
.sheet .paper-head h2{margin:0 0 4px;font-size:20pt;letter-spacing:2px;font-weight:800}
.sheet .paper-head .sub{font-size:11pt;color:#333}
.sheet .paper-head .meta{display:flex;justify-content:center;gap:24px;font-size:10.5pt;color:#333;margin-top:7px;flex-wrap:wrap}
.sheet .infobar{display:flex;gap:18px;justify-content:center;font-size:10.5pt;margin:10px 0 0;padding:7px 0;border-bottom:1px solid #ccc}
.sheet .infobar span{display:inline-flex;gap:6px;align-items:baseline}
.sheet .infobar u{display:inline-block;min-width:70px;border-bottom:1px solid #666;text-decoration:none}
.sheet .anscard{margin:14px 0 10px;break-inside:avoid}
.sheet .anscard-t{font-size:10.5pt;font-weight:700;margin:0 0 5px}
.sheet .anscard table{width:100%;border-collapse:collapse;margin:0 0 8px;table-layout:fixed}
.sheet .anscard th{width:46px;padding:0;font-size:10.5pt;font-weight:700;text-align:center;white-space:nowrap;border-top:1.5px solid #1a1f2b}
.sheet .anscard td{height:26px;padding:0;text-align:center;font-size:10.5pt;line-height:26px;border-left:1px solid #e3e8f0}
.sheet .anscard tr:first-child td{border-top:1.5px solid #1a1f2b;border-bottom:1px solid #1a1f2b}
.sheet .anscard tr:last-child th{border-bottom:1.5px solid #1a1f2b}
.sheet .anscard tr:last-child td{border-bottom:1.5px solid #1a1f2b}
.sheet .anscard td.a{color:#c0392b;font-weight:700}
.sheet .notice{font-size:10.5pt;color:#333;border:1px solid #cfd5e0;border-radius:6px;padding:7px 10px;margin:12px 0 14px;background:#fafbfd;white-space:pre-wrap}
.sheet .group-h{font-size:13pt;font-weight:800;margin:16px 0 8px;border-left:4px solid #1a1f2b;padding-left:8px}
.sheet .group-h .gs{font-weight:400;font-size:10.5pt;color:#444}
.sheet .q{margin:0 0 14px;page-break-inside:avoid;break-inside:avoid}
.sheet .q-h{font-weight:700;font-size:12pt}
.sheet .q-h .qn{margin-right:2px}
.sheet .q-h .qs{font-weight:400;color:#444;font-size:10.5pt}
.sheet .q-h .qtext{min-width:0}
.sheet .q-body{font-size:11pt;line-height:1.8;margin-top:3px}
.sheet .q-body .sect{margin-top:5px}
.sheet .q-body .lb{font-weight:700;font-size:10.5pt;color:#222}
.sheet .q-body .prose p{margin:2px 0 4px}
.sheet .q-body .io{border:1px solid #d5dae3;border-radius:4px;background:#fbfbfc}
.sheet .q-body .io .hd{background:#f0f2f6;border-bottom:1px solid #dde1e9;font-size:9.5pt;padding:3px 8px;color:#333}
.sheet .q-body .io pre{padding:6px 8px;font-size:10pt;max-height:none}
.sheet .q-body .prose{font-size:11pt;line-height:1.8}
.sheet .q-body .prose code{font-size:10.5pt}
.sheet .q-body pre{background:#f6f7f9;color:#111;border:1px solid #dde1e9}
.sheet .q-body pre code{color:#111}
.sheet .opts{display:grid;gap:2px 14px;margin-top:4px}
.sheet .opts.c2{grid-template-columns:1fr 1fr}
.sheet .opts .op{display:flex;gap:5px;align-items:baseline;font-size:11pt;line-height:1.8;break-inside:avoid}
.sheet .opts .op .ot{min-width:0}
.sheet .opts .op .ot p{display:inline;margin:0}
.sheet .opts .op .ol{font-weight:700;flex:none}
.sheet .tfblank{font-weight:700;letter-spacing:2px}
.sheet .answerbox{margin-top:5px;border:1px dashed #b9c0cd;border-radius:4px;padding:5px 8px}
.sheet .answerbox .lb{font-size:9.5pt;color:#666}
.sheet .answerbox .lines div{border-bottom:1px dotted #c8cedb;height:22pt}
.sheet .ans-sec{page-break-before:always;break-before:page}
.sheet .ans-item{margin:0 0 12px;page-break-inside:avoid}
.sheet .ans-item h4{margin:0 0 3px;font-size:11.5pt}
.sheet .ans-item .kv{font-size:10.5pt;color:#222}
.sheet .ans-key{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:11pt;margin:6px 0 14px}
.sheet .ans-key span{min-width:70px}
.sheet .paper-foot{text-align:center;font-size:9.5pt;color:#666;margin-top:20px;border-top:1px solid #dde1e9;padding-top:8px}
.sheet .empty-hint{color:#888;font-size:11pt;text-align:center;padding:40px 0}

/* ---------- toast ---------- */
#toast{position:fixed;left:50%;bottom:34px;transform:translateX(-50%);z-index:200;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}
.toast{
  background:#1d2432;color:#fff;padding:9px 16px;border-radius:10px;font-size:13px;
  box-shadow:0 10px 30px -12px rgba(0,0,0,.6);
  animation:tin .2s ease, tout .25s ease 2.1s forwards;max-width:80vw;
}
.toast.ok{background:#0f7a56}
.toast.warn{background:#96620f}
@keyframes tin{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes tout{to{opacity:0;transform:translateY(-6px)}}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .paper-wrap{grid-template-columns:1fr}
  .sidebar{position:fixed;left:0;top:60px;bottom:0;z-index:45;transform:translateX(-100%);transition:.24s;box-shadow:0 10px 40px rgba(0,0,0,.2)}
  .sidebar.on{transform:none}
  .nav{margin-left:0}
  .brand p{display:none}
}
@media (max-width:760px){
  .cards{grid-template-columns:1fr;padding:12px 12px 90px}
  .toolbar{padding:10px 12px}
  .sheet{width:auto;margin:10px;padding:16px}
  .top-actions .btn span.pill{display:none}
}

/* ---------- 打印 ---------- */
@page{size:A4;margin:14mm 15mm}
@media print{
  html,body{background:#fff;height:auto}
  body > *{display:none!important}
  #previewLayer{display:block!important;position:static!important;background:#fff!important;padding:0!important;overflow:visible!important}
  #previewLayer .pv-bar{display:none!important}
  .sheet{width:auto;min-height:0;margin:0;padding:0;box-shadow:none;font-size:11pt}
  .sheet .q{page-break-inside:avoid}
  a{color:inherit;text-decoration:none}
}