/* app.css - 作业批改 MVP 前端样式 */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --brand:#2563eb; --brand-d:#1e40af; --brand-weak:#eff6ff;
  --ink:#1e293b; --muted:#64748b; --line:#e2e8f0; --bg:#f1f5f9;
  --green:#15803d; --green-weak:#f0fdf4; --red:#b91c1c; --red-weak:#fef2f2;
  --amber:#b45309; --amber-weak:#fffbeb; --card:#fff;
}
body{font-family:-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);font-size:14px;line-height:1.6}
.topbar{background:#0f172a;color:#fff;display:flex;align-items:center;gap:14px;padding:0 22px;height:56px}
.topbar .logo{width:34px;height:34px;border-radius:9px;background:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px}
.topbar h1{font-size:16px;font-weight:600}
.topbar .env{margin-left:auto;font-size:12px;background:rgba(255,255,255,.12);padding:3px 12px;border-radius:14px}
.tabs{display:flex;background:#fff;border-bottom:1px solid var(--line);padding:0 22px;gap:4px;overflow-x:auto}
.tab{padding:13px 18px;font-size:14px;color:var(--muted);cursor:pointer;border:none;background:none;border-bottom:2px solid transparent;white-space:nowrap}
a.tab{display:inline-block;text-align:center;text-decoration:none}
.tab:hover{color:var(--ink)}
.tab.active{color:var(--brand);border-bottom-color:var(--brand);font-weight:600}
.container{max-width:1080px;margin:0 auto;padding:22px}
.view{display:none}
.view.active{display:block}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:18px}
.card h2{font-size:16px;font-weight:700;margin-bottom:4px}
.card .desc{color:var(--muted);font-size:13px;margin-bottom:16px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid3{display:grid;grid-template-columns:300px minmax(0,1fr) minmax(0,1fr);gap:12px}
/* 批改工作台三段面板：去硬边框换柔阴影、压内边距，弱化"花框"感、把空间留给内容 */
.grid3 .card{background:var(--card);border:none;border-radius:10px;box-shadow:0 1px 2px rgba(15,23,42,.05);padding:12px 14px;margin-bottom:0}
.grid3 .card h2{font-size:15px;margin-bottom:2px}
.grid3 .card .desc{font-size:12px;margin-bottom:10px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media(max-width:900px){.grid3{grid-template-columns:1fr}}
@media(max-width:760px){.grid2,.grid4{grid-template-columns:1fr}}
/* 判题三段式：左学生/中切分图/右题目，各自独立滚动，互不干扰 */
.scroll-col{max-height:calc(100vh - 300px);min-height:220px;overflow-y:auto}
@media(max-width:900px){.scroll-col{max-height:none}}
button{font-family:inherit;cursor:pointer;border:none;border-radius:9px;font-size:14px}
button.pri{background:var(--brand);color:#fff;padding:10px 18px;font-weight:600}
button.pri:hover{background:var(--brand-d)}
button.ghost{background:#fff;border:1px solid var(--line);padding:9px 16px;color:var(--ink)}
button.ghost:hover{background:#f8fafc;border-color:#cbd5e1}
button.ghost.active{border-color:var(--brand,#2563eb);color:var(--brand,#2563eb);background:var(--brand-weak,#dbeafe)}
button.sm{padding:5px 12px;font-size:12.5px}
/* 判题中状态（试卷切分区 / 判题列表区） */
.grading-state{padding:32px 16px;text-align:center;color:var(--muted)}
.grading-spin{width:32px;height:32px;border:3px solid var(--line);border-top-color:var(--brand,#2563eb);border-radius:50%;animation:grading-rot 0.8s linear infinite;margin:0 auto}
@keyframes grading-rot{to{transform:rotate(360deg)}}
button:disabled{opacity:.5;cursor:not-allowed}
input,textarea,select{font-family:inherit;font-size:14px;border:1px solid var(--line);border-radius:9px;padding:9px 12px;width:100%;background:#fff;color:var(--ink)}
input:focus,textarea:focus{outline:none;border-color:var(--brand)}
label{font-size:13px;color:var(--muted);display:block;margin-bottom:4px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{border-bottom:1px solid var(--line);padding:9px 11px;text-align:left;vertical-align:middle}
th{color:var(--muted);font-weight:600;font-size:12.5px;background:#f8fafc}
.tag{display:inline-block;padding:2px 10px;border-radius:20px;font-size:12px;font-weight:600}
.tag.r{background:var(--green-weak);color:var(--green)}
.tag.w{background:var(--red-weak);color:var(--red)}
.tag.p{background:var(--amber-weak);color:var(--amber)}
.tag.gray{background:#f1f5f9;color:var(--muted)}
.metric{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}
.metric .lab{color:var(--muted);font-size:12.5px;margin-bottom:2px}
.metric .val{font-size:24px;font-weight:700}
.metric .val.g{color:var(--green)} .metric .val.r{color:var(--red)} .metric .val.a{color:var(--amber)} .metric .val.b{color:var(--brand)}
.metric .sub{color:var(--muted);font-size:12px}
.toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%);background:#0f172a;color:#fff;padding:12px 24px;border-radius:10px;font-size:14px;z-index:999;opacity:0;transition:opacity .25s;pointer-events:none}
.empty{text-align:center;color:var(--muted);padding:36px 20px}
.empty .big{font-size:40px;margin-bottom:10px}
.barw{margin-bottom:14px}
.barw .bh{display:flex;justify-content:space-between;font-size:13px;margin-bottom:4px}
.barw .bh b{font-weight:600}
.bar{height:18px;border-radius:6px;background:var(--brand);min-width:3px}
.bar.hot{background:#dc2626}.bar.warn{background:#f59e0b}.bar.ok{background:#16a34a}
/* 班级看板·高频错题：左侧模板原题切图 + 右侧题目/计数/比例条 */
.hotrow{display:flex;align-items:flex-start;gap:12px;margin-bottom:14px}
.hotrow .hotimg{width:110px;height:82px;object-fit:cover;border:1px solid var(--line);border-radius:6px;flex:none}
.hotrow .hotmain{flex:1;min-width:0}
.hotrow .hotmain .bh{display:flex;justify-content:space-between;gap:12px;font-size:13px;margin-bottom:6px;align-items:flex-start}
.hotrow .hotmain .bh b{font-weight:600}
.qrow{display:flex;align-items:center;gap:10px;padding:10px 4px;border-bottom:1px solid var(--line)}
.qrow:last-child{border-bottom:none}
/* 判题列表"第N页(正/反)"分隔头：弱化、不占空间 */
.page-sep{margin:12px 0 6px;padding:5px 2px;font-size:12.5px;font-weight:600;color:var(--brand);border-bottom:1px solid var(--line)}
.qrow .qn{color:var(--muted);font-weight:600;width:40px;flex:none}
.qrow .qt{flex:1}
.hint{background:var(--brand-weak);border:1px solid #bfdbfe;border-radius:10px;padding:12px 16px;font-size:13px;margin-bottom:16px}
.modal-bg{position:fixed;inset:0;background:rgba(15,23,42,.5);display:none;align-items:center;justify-content:center;z-index:1000}
.modal-bg.show{display:flex}
.modal{background:#fff;border-radius:16px;padding:24px;width:92%;max-width:560px;max-height:90vh;overflow-y:auto}
.drop{border:2px dashed #cbd5e1;border-radius:12px;padding:30px;text-align:center;color:var(--muted);cursor:pointer;margin:8px 0}
.drop.hover{border-color:var(--brand);background:var(--brand-weak)}
.heat{overflow-x:auto}
.heat table td,.heat table th{border:1px solid var(--line);text-align:center;padding:6px;font-size:12px}
.heat td.ok{background:#dcfce7;color:#166534}
.heat td.wrong{background:#fee2e2;color:#991b1b}
.heat td.pend{background:#fef3c7;color:#92400e}
.thumb{width:80px;height:80px;object-fit:cover;border-radius:8px;border:1px solid var(--line)}
.thumbtile{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.qthumbs{display:flex;flex-direction:column;gap:6px;flex:none;align-items:flex-start}
.bandthumb{width:150px;height:50px;object-fit:contain;border-radius:8px;border:1px solid var(--line);background:#fff}
.exportbar{display:flex;gap:12px;flex-wrap:wrap}
.exportbtn{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:12px;padding:14px 18px;background:#fff;cursor:pointer;width:100%;text-align:left}
.exportbtn:hover{border-color:var(--brand);background:var(--brand-weak)}
.exportbtn .eico{width:42px;height:50px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;flex:none;font-size:11px}
.mini{font-size:12px;color:var(--muted)}
.twoCol{display:grid;grid-template-columns:300px 1fr;gap:18px}
@media(max-width:900px){.twoCol{grid-template-columns:1fr}}
.stuItem{display:flex;align-items:center;gap:10px;padding:8px 12px;border:1px solid var(--line);border-radius:9px;margin-bottom:6px;background:#fff;cursor:pointer}
.stuItem.active{border-color:var(--brand);background:var(--brand-weak)}
.stuItem .av{width:30px;height:30px;border-radius:50%;background:var(--brand-weak);color:var(--brand-d);display:flex;align-items:center;justify-content:center;font-weight:600;font-size:13px;flex:none}
.resultmark{display:flex;gap:8px;flex-wrap:wrap}
.verdict-item{padding:6px 14px;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer;border:none}
.verdict-item.r{background:var(--green-weak);color:var(--green)}
.verdict-item.w{background:var(--red-weak);color:var(--red)}
.verdict-item.p{background:var(--amber-weak);color:var(--amber)}
.legend{display:flex;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin:8px 0}
.legend span{display:flex;align-items:center;gap:5px}
.sw{width:12px;height:12px;border-radius:3px;display:inline-block}
.swn{background:#e2e8f0}.swo{background:#dcfce7}.sww{background:#fee2e2}

/* ===== 顶栏 + 侧边导航（对齐参考 Demo 设计） ===== */
body{display:flex;flex-direction:column;height:100vh;overflow:hidden}
.topbar{background:#1e293b;color:#fff;padding:10px 20px;display:flex;align-items:center;gap:14px;box-shadow:0 1px 3px rgba(0,0,0,.15);flex:none}
.topbar .logo{width:34px;height:34px;border-radius:8px;background:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;flex:none}
.topbar .tb-title{font-size:15px;font-weight:600}
.topbar .tb-sub{font-size:12px;opacity:.75}
.topbar .badge{margin-left:auto;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.3);padding:3px 12px;border-radius:20px;font-size:12px;white-space:nowrap}
.layout{display:flex;flex:1;min-height:0;background:var(--bg)}
.side{width:230px;flex:none;background:var(--card);border-right:1px solid var(--line);padding:14px 10px;overflow-y:auto;display:flex;flex-direction:column;gap:4px}
@media(max-width:760px){.side{display:none}}
.side .grouptitle{font-size:11px;color:var(--muted);letter-spacing:.5px;padding:12px 10px 4px;font-weight:600}
.side .navbtn{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:9px;font-size:13.5px;cursor:pointer;color:var(--ink);width:100%;text-align:left;text-decoration:none;transition:background .2s,color .2s}
.side .navbtn:hover{background:#f1f5f9}
.side .navbtn.active{background:var(--brand-weak);color:var(--brand-d);font-weight:600}
.side .navbtn .ico{width:24px;height:24px;border-radius:7px;display:flex;align-items:center;justify-content:center;flex:none;background:#e2e8f0;color:#475569}
.side .navbtn.active .ico{background:var(--brand);color:#fff}
.side .navbtn .ico svg{width:14px;height:14px}
.main{flex:1;min-width:0;padding:24px 28px;overflow-y:auto;background:var(--bg)}
.main .container{max-width:1560px;margin:0 auto;padding:0}

/* ===== 自定义原生控件：select 下拉框 + 滚动条（去原生样式） ===== */
select{
  appearance:none;-webkit-appearance:none;-moz-appearance:none;
  background-color:#fff;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 11px center;background-size:15px;
  color:var(--ink);padding-right:32px;cursor:pointer;
  transition:border-color .2s,box-shadow .2s;
}
select:hover{border-color:#cbd5e1}
select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
/* 细滚动条（WebKit/Blink） */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:8px;border:2px solid transparent;background-clip:padding-box}
::-webkit-scrollbar-thumb:hover{background:#94a3b8;background-clip:padding-box}
/* Firefox 细滚动条 */
*{scrollbar-width:thin;scrollbar-color:#cbd5e1 transparent}

/* ===== 自定义下拉组件(替换原生 select 弹层) ===== */
.ct-select{position:relative;display:inline-block;width:100%}
.ct-trigger{width:100%;display:flex;align-items:center;justify-content:space-between;gap:8px;background:#fff;border:1px solid var(--line);border-radius:9px;padding:8px 12px;font-size:14px;color:var(--ink);cursor:pointer;text-align:left;transition:border-color .2s,box-shadow .2s}
.ct-trigger:hover{border-color:#cbd5e1}
.ct-select.open .ct-trigger{border-color:var(--brand);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.ct-trigger span{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ct-chev{width:15px;height:15px;flex:none;color:#64748b;transition:transform .2s}
.ct-select.open .ct-chev{transform:rotate(180deg)}
.ct-menu{position:absolute;top:calc(100% + 4px);left:0;right:0;z-index:60;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 32px rgba(15,23,42,.14);max-height:240px;overflow-y:auto;padding:4px;display:none}
.ct-select.open .ct-menu{display:block}
.ct-opt{padding:8px 11px;border-radius:7px;font-size:13.5px;cursor:pointer;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ct-opt:hover{background:#f1f5f9}
.ct-opt.active{background:var(--brand-weak);color:var(--brand-d);font-weight:600}

/* ===== 切分预览(白盒)：原图 + 每题红框 ===== */
.cut-preview{position:relative;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:10px 0;background:#fff}
.cut-preview img{width:100%;display:block}
.cut-preview.load-failed{background:#f8fafc}
.cut-preview-error{padding:22px;text-align:center;color:var(--muted);font-size:13px}
.calib-cut-prev{margin:0 auto;max-width:150px}
.calib-cut-prev .cut-preview{margin:0}
.cutbox{position:absolute;border:2px solid #ef4444;background:rgba(239,68,68,.10);display:flex;align-items:flex-start;justify-content:flex-start;font-size:11px;font-weight:700;color:#b91c1c;cursor:pointer;transition:background .15s}
.cutbox:hover{background:rgba(239,68,68,.22)}
.cutbox .lb{padding:1px 5px;background:#ef4444;color:#fff;border-radius:3px;font-size:10px;margin:2px}
.cutbox input.lb.edit{width:46px;padding:1px 5px;background:#fff;color:#b91c1c;border:1px solid #dc2626;border-radius:3px;font-size:11px;font-weight:700;margin:2px;outline:none;cursor:text}
.cutbox input.lb.edit:focus{box-shadow:0 0 0 2px #fff}
/* 手动框选画框 */
.cut-preview.drawable{cursor:crosshair}
.cut-preview.drawable img{pointer-events:none;user-select:none}
.cutbox.drawn-box{cursor:move}
.cutbox.drawn-box.selected{box-shadow:0 0 0 3px rgba(239,68,68,.25);border-color:#b91c1c}
.cutbox.readonly{pointer-events:none;cursor:default}
.cutbox .handle{position:absolute;width:11px;height:11px;background:#fff;border:2px solid #dc2626;border-radius:2px;box-shadow:0 0 0 1px rgba(255,255,255,.6)}
.cutbox .handle-nw{left:-6px;top:-6px;cursor:nwse-resize}
.cutbox .handle-ne{right:-6px;top:-6px;cursor:nesw-resize}
.cutbox .handle-sw{left:-6px;bottom:-6px;cursor:nesw-resize}
.cutbox .handle-se{right:-6px;bottom:-6px;cursor:nwse-resize}
.cutbox .del{position:absolute;right:-13px;top:-13px;width:18px;height:18px;background:#ef4444;color:#fff;border-radius:50%;font-size:13px;line-height:18px;text-align:center;cursor:pointer;border:none;font-weight:700;box-shadow:0 1px 3px rgba(0,0,0,.25)}
.cutbox .del:hover{background:#dc2626}
.cutbox.drawing-live{border-style:dashed;opacity:.85;pointer-events:none;background:rgba(239,68,68,.18);border-color:#ef4444}
/* 手动框选页码缩略图条 */
.tpl-thumb{height:82px;width:auto;border:2px solid var(--line);border-radius:8px;cursor:pointer;opacity:.6;transition:opacity .15s,border-color .15s;background:#fff}
.tpl-qrow.flash{background:#fde68a;transition:background .3s}
/* 题号序输入：去掉原生数字微调箭头，居中，稳重 */
.tpl-c-seq{text-align:center}
.tpl-seq{width:100%;text-align:center;font-size:13px;padding:2px 4px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--txt);-moz-appearance:textfield;appearance:textfield}
.tpl-seq::-webkit-outer-spin-button,.tpl-seq::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
/* 题干/标准答案 双行 textarea */
.tpl-ta{font-size:13px;line-height:1.4;width:100%;padding:5px 6px;border:1px solid var(--line);border-radius:6px;background:#fff;resize:none;vertical-align:top;color:var(--txt)}
.tpl-ta:focus{outline:none;border-color:var(--brand,#2563eb)}
.tpl-right .tpl-ta{vertical-align:top;display:block}
/* 题型下拉：干净、不挤压 */
.tpl-type{width:100%;font-size:12px;padding:3px 2px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--txt);height:26px;box-sizing:border-box}
.tpl-type:focus{outline:none;border-color:var(--brand,#2563eb)}
/* 每题切分图缩略 */
.tpl-c-crop{text-align:center;vertical-align:middle}
.tpl-crop{max-width:44px;max-height:34px;border:1px solid var(--line);border-radius:4px;cursor:zoom-in;object-fit:contain;background:#fff;vertical-align:middle;display:inline-block}
.tpl-crop:hover{border-color:var(--brand,#2563eb)}
.tpl-err{font-size:11px;color:#dc2626;line-height:1.35;margin-top:3px;text-align:left;max-width:96px;word-break:break-word}
/* 上传前调整图片方向弹窗：网格卡片 每张可逆/顺时针转 */
.adjust-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.adjust-card{border:1px solid var(--line);border-radius:10px;padding:8px;background:#fff;text-align:center}
.adjust-card .adjust-thumb{width:100%;height:150px;object-fit:contain;border:1px solid var(--line);border-radius:6px;cursor:zoom-in;background:#f8fafc}
.adjust-card .adjust-side{font-size:12px;color:var(--muted);margin:6px 0 2px}
.adjust-card .adjust-ops{display:flex;gap:6px;justify-content:center}
.adjust-card .adjust-ops button{white-space:nowrap;flex:1}/* 按钮文字不折行：逆时针/顺时针/换图 各占一行显示 */
/* 学生信息区复选框：单行、不受窄工具栏挤压 */
.tpl-info-chk{display:inline-flex;align-items:center;gap:6px;margin:0;font-size:13px;white-space:nowrap;flex:none;line-height:1}
.tpl-info-chk input{width:15px;height:15px;margin:0}
/* 提取进度条 */
.tpl-bar{height:9px;background:#e2e8f0;border-radius:999px;overflow:hidden;border:1px solid var(--line)}
.tpl-bar>div{height:100%;background:var(--brand,#2563eb);width:0;transition:width .3s ease}
.tpl-bar.busy>div{background-image:linear-gradient(45deg,rgba(255,255,255,.3) 25%,transparent 25%,transparent 50%,rgba(255,255,255,.3) 50%,rgba(255,255,255,.3) 75%,transparent 75%,transparent);background-size:22px 22px;animation:tplbar .6s linear infinite}
@keyframes tplbar{0%{background-position:0 0}100%{background-position:22px 0}}
/* 全屏框选 */
#tplFullscreen{position:fixed;inset:0;background:#0f172a;z-index:2000;display:flex;align-items:stretch;gap:10px;padding:10px}
/* 左右侧栏：占用两侧深色空白，不占顶部，让中间图片更高更大 */
#tplFullscreen .tpl-full-side{flex:0 0 auto;width:190px;display:flex;flex-direction:column;gap:10px;color:#e5e7eb}
#tplFullscreen .tpl-full-left{align-items:flex-start}
#tplFullscreen .tpl-full-right{align-items:stretch;gap:8px}
#tplFullscreen .tpl-full-title{font-size:16px;font-weight:700;color:#fff;line-height:1.3}
#tplFullscreen .tpl-full-hint{font-size:12px;color:#94a3b8;line-height:1.6}
#tplFullscreen .tpl-full-info{display:inline-flex;align-items:center;gap:6px;margin:0;font-size:12px;color:#e5e7eb;background:rgba(255,255,255,.08);padding:6px 9px;border-radius:8px;white-space:nowrap;flex:none;line-height:1}
#tplFullscreen .tpl-full-info input{width:15px;height:15px;margin:0}
#tplFullscreen .tpl-full-canvas{flex:1;min-width:0;overflow:auto;display:flex;align-items:flex-start;justify-content:center;background:#1e293b;border-radius:12px;padding:12px}
/* 画框容器：收缩包裹图片(画布坐标=图片坐标)，图片整体等比缩到"高只留一点边距"，上下留白更小、显示更大 */
#tplFullscreen .tpl-full-box{position:relative;width:max-content;max-width:100%;margin:0;border:1px solid #334155;border-radius:6px;background:#fff;overflow:hidden}
#tplFullscreen .tpl-full-box img{display:block;max-width:100%;max-height:calc(100vh - 24px);width:auto;height:auto}
@media (max-width:1100px){ #tplFullscreen .tpl-full-side{width:150px} }
.tpl-thumb:hover{opacity:1}
.tpl-thumb.active{border-color:var(--brand);opacity:1}

/* ===== 当前页面内查看完整试卷 ===== */
.paper-modal{width:min(94vw,1000px);max-width:1000px;padding:0;overflow:hidden}
.paper-modal-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;border-bottom:1px solid var(--line);background:#fff}
.paper-modal-head h2{margin:0 0 3px}
.paper-pages{max-height:calc(90vh - 82px);overflow:auto;padding:18px;background:#e2e8f0}
.paper-page{position:relative;max-width:820px;margin:0 auto 18px;padding:38px 14px 14px;border-radius:12px;background:#fff;box-shadow:0 3px 14px rgba(15,23,42,.12)}
.paper-page:last-child{margin-bottom:0}
.paper-page-label{position:absolute;top:10px;left:14px;color:var(--muted);font-size:12px;font-weight:600}
.paper-page img{display:block;width:auto;max-width:100%;height:auto;margin:0 auto;border-radius:6px;cursor:zoom-in}
.paper-image-error{padding:70px 20px;text-align:center;color:var(--muted);background:#f8fafc;border:1px dashed #cbd5e1;border-radius:8px}