:root{
  --primary:#3556c9; --primary-weak:#eef1fb;
  --bg:#f4f6fa; --panel:#ffffff; --border:#e3e7ef;
  --text:#24292f; --muted:#6b7280; --weak:#9aa3af;
  --yellow:#fff3bf; --yellow-strong:#ffd43b;
  --orange:#f59f00; --green:#2f9e44; --red:#e03131; --purple:#7048e8;
  --radius:10px;
  --shadow:0 1px 3px rgba(16,24,40,.08),0 1px 2px rgba(16,24,40,.04);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:"Segoe UI","Microsoft YaHei",-apple-system,sans-serif;background:var(--bg);color:var(--text);font-size:14px;overflow:hidden}

/* 顶部 */
#topbar{position:fixed;top:0;left:0;right:0;height:96px;background:var(--panel);border-bottom:1px solid var(--border);z-index:50;display:flex;flex-direction:column}
#brandbar{height:56px;display:flex;align-items:center;gap:14px;padding:0 16px}
#brandbar .logo{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,#3556c9,#7048e8);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex-shrink:0}
#brandbar h1{font-size:16px;font-weight:700;letter-spacing:.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#brandbar .book-tag{background:var(--primary-weak);color:var(--primary);font-size:12px;padding:3px 10px;border-radius:20px;white-space:nowrap}
#brandbar .spacer{flex:1}
.tb-btn{border:1px solid var(--border);background:#fff;border-radius:8px;padding:6px 12px;font-size:13px;cursor:pointer;color:var(--text);white-space:nowrap}
.tb-btn:hover{border-color:var(--primary);color:var(--primary)}
.tb-btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.user-chip{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);white-space:nowrap}
.user-chip .avatar{width:28px;height:28px;border-radius:50%;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px}
.user-chip select{border:1px solid var(--border);border-radius:8px;padding:4px 6px;font-size:12px;background:#fff}
#mobileBtn{display:none}

#rankbar{height:40px;display:flex;align-items:center;gap:6px;padding:0 16px;border-top:1px solid var(--border);overflow-x:auto}
#rankbar .rk-label{font-size:12px;color:var(--muted);flex-shrink:0}
.rk-tab{display:flex;align-items:center;gap:6px;border:1px solid var(--border);border-radius:20px;padding:3px 10px;font-size:12px;cursor:pointer;white-space:nowrap;background:#fff}
.rk-tab:hover{border-color:var(--primary)}
.rk-tab.on{background:var(--primary);color:#fff;border-color:var(--primary)}
.rk-chip{display:inline-flex;align-items:center;gap:4px}
.rk-chip .medal{width:16px;height:16px;border-radius:50%;font-size:10px;color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:700}
.m1{background:#f5b301}.m2{background:#9aa5b1}.m3{background:#c98a4b}
#rankPanel{position:fixed;top:100px;right:16px;width:300px;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 8px 24px rgba(16,24,40,.14);z-index:60;display:none;overflow:hidden}
#rankPanel.open{display:block}
#rankPanel .rp-head{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;font-size:13px;font-weight:700;border-bottom:1px solid var(--border)}
#rankPanel .rp-head span{cursor:pointer;color:var(--muted);font-weight:400}
#rankPanel ul{list-style:none;max-height:320px;overflow:auto}
#rankPanel li{display:flex;align-items:center;gap:10px;padding:8px 14px;border-bottom:1px dashed var(--border);font-size:13px}
#rankPanel li:last-child{border-bottom:none}
#rankPanel li .no{width:20px;text-align:center;font-weight:700;color:var(--muted)}
#rankPanel li .nm{flex:1}
#rankPanel li .pt{color:var(--primary);font-weight:700}
#rankPanel li .tag{font-size:11px;padding:1px 6px;border-radius:10px}

/* 布局 */
#layout{position:fixed;top:96px;left:0;right:0;bottom:0;display:grid;grid-template-columns:20% 55% 25%}
.col{overflow-y:auto;padding:14px}
.col::-webkit-scrollbar{width:6px}
.col::-webkit-scrollbar-thumb{background:#d0d5dd;border-radius:3px}

#left{background:var(--panel);border-right:1px solid var(--border)}
.tree-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.tree-head b{font-size:13px}
.tree-head button{border:none;background:var(--primary-weak);color:var(--primary);border-radius:6px;padding:4px 8px;font-size:12px;cursor:pointer}
.chap{margin-bottom:4px;border-radius:8px}
.chap-row{display:flex;align-items:center;gap:6px;padding:7px 8px;border-radius:8px;cursor:pointer;font-size:13px}
.chap-row:hover{background:var(--bg)}
.chap-row.active{background:var(--primary-weak);color:var(--primary);font-weight:700}
.chap-row .caret{width:16px;text-align:center;color:var(--muted);font-size:10px;flex-shrink:0;transition:transform .15s}
.chap-row.open .caret{transform:rotate(90deg)}
.chap-row .badge{background:#f1f2f4;color:var(--muted);font-size:10.5px;border-radius:10px;padding:1px 6px}
.chap-edit{font-size:12px;color:var(--weak);cursor:pointer;padding:0 4px;border-radius:6px;flex-shrink:0}
.chap-edit:hover{color:var(--primary);background:var(--primary-weak)}
.chap-row.active .badge{background:#fff;color:var(--primary)}
.chap-children{padding-left:14px;display:none}
.chap.open .chap-children{display:block}
.sec-item{padding:5px 8px;font-size:12.5px;color:var(--muted);border-radius:6px;cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sec-item:hover{background:var(--bg);color:var(--text)}
.drag-over{outline:2px dashed var(--primary);outline-offset:-2px}

/* ---- 三级目录：项目（一级）→ 任务（二级）→ 小标题（三级） ---- */
.chap.lv1{margin-bottom:2px}
.chap-row.lv1{font-weight:700;font-size:13px;color:var(--text);background:transparent}
.chap-row.lv1:hover{background:var(--bg)}
.chap-kids{margin:1px 0 6px 10px;padding-left:8px;border-left:1px solid var(--border)}
.chap.lv2{margin-bottom:1px}
.chap-row.lv2{font-weight:400;font-size:12.5px;color:var(--muted2,var(--muted));padding:6px 8px}
.chap-row.lv2:hover{background:var(--bg);color:var(--text)}
.chap-row.lv2.active{background:var(--primary-weak);color:var(--primary);font-weight:700}
/* 一级标题占满剩余宽度，避免徽标被挤到右侧边缘 */
.chap-row .t-title{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chap-row .caret.sm{width:13px;font-size:9px}
.chap-row .caret.leaf{opacity:.45;transform:none !important}
/* 三级小标题列表始终由 JS 控制显隐（不再依赖 .chap.open） */
.chap.lv2 .chap-children{display:block;padding-left:22px}
/* 正文面包屑：项目 › 任务 */
.doc-crumb{font-size:12.5px;color:var(--muted);margin-bottom:4px}
.doc-crumb .sep{margin:0 4px;opacity:.6}

/* 点击目录跳转后，目标元素短暂高亮，便于确认位置 */
.el-wrap.el-flash{animation:elFlash 1.6s ease-out}
@keyframes elFlash{
  0%{background:rgba(46,158,68,.22)}
  100%{background:transparent}
}

#center{background:#ece3d2;padding:0}

/* ===== 教材化正文排版（中间阅读区更像纸质教材） ===== */
.book-page{
  background:#fffdf6;                /* 暖白纸面 */
  max-width:860px;
  margin:22px auto 40px;
  padding:54px 60px 70px;
  box-shadow:0 8px 30px rgba(70,50,15,.18);
  border-radius:2px;
  font-family:"Songti SC","SimSun","Noto Serif SC","Source Han Serif SC",serif; /* 宋体正文 */
  color:#1a1a1a;                     /* 黑色正文 */
  line-height:1.95;
  min-height:820px;                  /* 每页有限高度，像书页 */
}
.book-page .doc-head{
  background:transparent;border:none;box-shadow:none;padding:0 0 16px;margin-bottom:26px;
  border-bottom:2px solid #1f5fae;text-align:center;
}
.book-page .doc-head .dt{justify-content:center;font-size:12px;color:#9a9384;letter-spacing:1px}
.book-page .doc-head h2{
  font-family:"Microsoft YaHei","微软雅黑","PingFang SC",sans-serif;  /* 雅黑标题 */
  font-size:25px;font-weight:700;margin:10px 0 6px;color:#1f5fae;letter-spacing:1px;  /* 蓝色标题 */
  display:none;  /* 隐藏：正文内已有 section_title 元素作为标题，避免重复 */
}
.book-page .doc-head .meta{display:none}

/* 元素融入书页：去掉卡片感与版本角标（网页块） */
.book-page .el{background:transparent;border:none;box-shadow:none;padding:0;font-family:inherit;color:inherit}
.book-page .el .ver{display:none}
.book-page .el-bar{background:rgba(255,253,246,.94);border-color:#e7dcc6;box-shadow:0 4px 14px rgba(60,40,10,.16)}
.book-page .el-bar button{color:#6b6354}
.book-page .el-bar button:hover{background:#1f5fae;color:#fff}
.book-page .el-bar button.danger:hover{background:#c0392b;color:#fff}

/* ===== 个人阅读配色主题（data-theme 作用于 body，柔和书籍风） ===== */
[data-theme="paper"] .book-page{background:#fffdf6;color:#1a1a1a}
[data-theme="paper"] .book-page .doc-head{border-bottom-color:#1f5fae}
[data-theme="paper"] .book-page .doc-head h2{color:#1f5fae}
[data-theme="sage"] .book-page{background:#f6faf4;color:#20302a}
[data-theme="sage"] .book-page .doc-head{border-bottom-color:#2f7d5b}
[data-theme="sage"] .book-page .doc-head h2{color:#2f7d5b}
[data-theme="sand"] .book-page{background:#fbf7f0;color:#2a2419}
[data-theme="sand"] .book-page .doc-head{border-bottom-color:#b07d2b}
[data-theme="sand"] .book-page .doc-head h2{color:#b07d2b}
[data-theme="blue"] .book-page{background:#f4f8fd;color:#1c2733}
[data-theme="blue"] .book-page .doc-head{border-bottom-color:#2c6fc0}
[data-theme="blue"] .book-page .doc-head h2{color:#2c6fc0}
[data-theme="rose"] .book-page{background:#fdf5f8;color:#33202b}
[data-theme="rose"] .book-page .doc-head{border-bottom-color:#b4548a}
[data-theme="rose"] .book-page .doc-head h2{color:#b4548a}

/* ===== 书籍正文字体（data-font 作用于 body） ===== */
[data-font="song"] .book-page{font-family:"Songti SC","SimSun","Noto Serif SC","Source Han Serif SC",serif}
[data-font="kai"] .book-page{font-family:"Kaiti SC","KaiTi","STKaiti",serif}
[data-font="hei"] .book-page{font-family:"Microsoft YaHei","PingFang SC",sans-serif}
[data-font="fang"] .book-page{font-family:"FangSong","STFangsong","FangSong_GB2312",serif}
[data-font="regular"] .book-page{font-family:system-ui,"Microsoft YaHei",sans-serif}

/* 个人中心：配色色卡 */
.theme-swatches{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0 4px}
.theme-sw{transition:transform .12s}
.theme-sw:hover{transform:translateY(-2px)}

/* 顶部品牌 Logo 尺寸（网站设置 logo_size：sm/md/lg） */
#brandbar .logo.sm img{width:26px;height:26px}
#brandbar .logo.md img{width:34px;height:34px}
#brandbar .logo.lg img{width:44px;height:44px}
#brandbar .logo img{object-fit:contain;border-radius:8px;display:block}
.guest-bar .logo img{width:34px;height:34px;object-fit:contain;border-radius:8px;display:block}
.book-page .el-bar button.audit{color:#1f5fae}

/* 标题：雅黑 + 蓝色 */
.book-page .t-chapter,
.book-page .t-section,
.book-page .t-sub{
  font-family:"Microsoft YaHei","微软雅黑","PingFang SC","Hiragino Sans GB",sans-serif;
  color:#1f5fae;
}
.book-page .t-chapter{
  text-align:center;font-size:26px;font-weight:700;
  padding:4px 0 16px;margin:8px 0 24px;
  border-bottom:2px solid #1f5fae;letter-spacing:2px;
}
.book-page .t-section{
  font-size:20px;font-weight:700;
  margin:28px 0 14px;padding:0 0 0 14px;border-left:4px solid #1f5fae;letter-spacing:1px;
}
.book-page .t-sub{font-size:17px;font-weight:700;margin:20px 0 10px}
/* 正文：宋体、黑字、首行缩进 2 字符 */
.book-page .t-paragraph{
  font-size:16px;line-height:1.95;text-align:justify;color:#1a1a1a;
  text-indent:2em;margin:0 0 6px;letter-spacing:.01em;
}
.book-page .snt{font-family:inherit;cursor:pointer;border-radius:2px;padding:0 1px;transition:background .12s}
.book-page .snt:hover{background:#eaf1fb}
.book-page .snt.hl-pending{border-bottom:1px dashed #e8c418;background:transparent;box-shadow:none}
.book-page .snt.hl-adopted{border-bottom:1px dashed #e8c418;background:transparent}
.book-page .snt.hl-hidden{border-bottom:1px dashed #e8c418;background:transparent;outline:none}
.book-page .t-image .cap,.book-page .t-video .vmeta{
  font-family:inherit;font-style:italic;font-size:13px;color:#8a8377;text-align:center;margin-top:8px;
}
.book-page .t-image .imgbox{background:#faf7f0;border:1px solid #e7dcc6}
.book-page .t-image .imgbox img{cursor:zoom-in}
.book-page .t-image .imgph{color:#9a8f78}
/* 表格：教材风 */
.book-page .t-table table{border:1px solid #9a9a9a;font-family:inherit}
.book-page .t-table th{background:#eef2f8;color:#1f5fae;border:1px solid #c2cbd8;font-weight:700}
.book-page .t-table td{border:1px solid #d2ccc0;font-size:14px;line-height:1.8;color:#1a1a1a}
.book-page .t-table td.hl-cell{border:2px solid #e08e0b!important;background:#fff7e6}
/* 去掉网页式批注状态块（已采纳 / 待审 等文字），教材里只保留文字本身的高亮 */
.book-page .el-note{display:none}

/* ============ 阅读 / 编辑 模式 ============ */
/* 阅读模式：纯净教材版面，鼠标悬停不出现任何编辑控件 */
#center.mode-read .el-bar{display:none!important}
#center.mode-read .size-btn{display:none!important}
#center.mode-read .gap{display:none!important}
#center.mode-read .el:hover{box-shadow:none}
#center.mode-read .snt:hover{background:transparent}

/* 编辑模式：彩色可编辑提示，悬停才浮现控件 */
#center.mode-edit .el-bar{display:none}
#center.mode-edit .el:hover .el-bar{opacity:1;display:flex}
#center.mode-edit .size-btn{opacity:0}
#center.mode-edit .t-image .imgbox:hover .size-btn,
#center.mode-edit .t-video .vbox:hover .size-btn{opacity:1}
#center.mode-edit .gap{opacity:0}
#center.mode-edit .el-wrap:hover + .gap,
#center.mode-edit .gap:hover{opacity:1}
#center.mode-edit .el{
  background:#fffdf3;border-left:4px solid #ff9f43;border-radius:6px;
  padding:12px 16px 12px 18px;box-shadow:0 2px 10px rgba(255,159,67,.12);
}
#center.mode-edit .doc-head{background:#fffaf0;border:1px dashed #ffb866;color:#8a5a1a}
#center.mode-edit .doc-head h2{color:#b5651d}
#center.mode-edit .snt:hover{background:#eaf1fb}
/* 交流模式：精简紧凑，减少段间距与标题占用 */
#center.mode-edit .el{
  background:transparent;border-left:3px solid #ffd8a8;border-radius:4px;
  padding:4px 10px;box-shadow:none;margin-bottom:2px;
}
#center.mode-edit .gap{height:6px}
#center.mode-edit .t-paragraph{line-height:1.7;margin:0}
#center.mode-edit .t-chapter{padding:10px 0 4px;font-size:17px;border-left:none}
#center.mode-edit .t-section{padding:10px 0 6px;font-size:15px;border-bottom:none;color:var(--primary)}
#center.mode-edit .t-sub{padding:7px 0 2px;font-size:13.5px}

/* 编辑模式顶部提示条 */
.mode-banner{
  max-width:880px;margin:18px auto 0;padding:10px 16px;
  background:linear-gradient(90deg,#fff4e6,#ffe8cc);
  border:1px solid #ffd8a8;border-left:4px solid #ff922b;border-radius:8px;
  font-size:13px;color:#9a5b16;line-height:1.6;
}

/* 顶部 阅读/编辑 切换 */
.mode-seg{display:inline-flex;border:1px solid var(--border);border-radius:9px;overflow:hidden;background:#fff;margin-left:2px}
.mode-seg .ms-item{padding:6px 12px;font-size:12.5px;cursor:pointer;color:var(--muted);user-select:none;white-space:nowrap}
.mode-seg .ms-item:hover{background:#f3f5f9}
.mode-seg .ms-item.on{background:var(--primary);color:#fff;font-weight:700}
/* 编辑插入点：仅悬停时浮现，默认不出现网页块 */
.book-page .gap{opacity:0;transition:opacity .15s}
.book-page .el-wrap:hover + .gap,.book-page .gap:hover{opacity:1}
.doc-head{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 22px;margin-bottom:16px}
.doc-head .dt{font-size:12px;color:var(--muted);display:flex;gap:12px;flex-wrap:wrap}
.doc-head h2{font-size:17px;margin:6px 0 4px}
.doc-head .meta{font-size:12px;color:var(--muted)}
.el-wrap{position:relative;margin-bottom:2px}
.gap{height:26px;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .15s}
.el-wrap:hover + .gap,.gap:hover,.gap.show{opacity:1}
.gap button{border:1px dashed var(--primary);background:#fff;color:var(--primary);border-radius:16px;width:30px;height:22px;font-size:13px;cursor:pointer;line-height:1}
.gap button:hover{background:var(--primary);color:#fff}
.el{position:relative;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 18px;transition:box-shadow .15s}
.el:hover{box-shadow:0 3px 10px rgba(16,24,40,.12)}
.el .ver{position:absolute;top:8px;right:10px;font-size:11px;color:var(--weak)}
.el-bar{position:absolute;top:-12px;right:12px;background:#fff;border:1px solid var(--border);border-radius:8px;display:flex;gap:2px;padding:2px;opacity:0;transition:opacity .15s;box-shadow:var(--shadow);z-index:5}
.el:hover .el-bar{opacity:1}
.el-bar button{border:none;background:none;font-size:11.5px;padding:3px 7px;border-radius:6px;cursor:pointer;color:var(--muted)}
.el-bar button:hover{background:var(--primary-weak);color:var(--primary)}
.el-bar button.danger:hover{background:#fdecec;color:var(--red)}
.el-bar button.audit{color:var(--orange)}
.t-chapter{font-size:19px;font-weight:700;padding:20px 18px;border-left:5px solid var(--primary)}
.t-section{font-size:16.5px;font-weight:700;color:var(--primary);border-bottom:1px solid var(--border);padding:16px 18px 12px}
.t-sub{font-size:14.5px;font-weight:700;padding:12px 18px}
.t-paragraph{font-size:14.5px;line-height:2.05;text-align:justify}
.snt{cursor:pointer;border-radius:3px;padding:1px 0}
.snt:hover{background:#eef1fb}
.snt.hl-pending{border-bottom:1px dashed #e8c418;background:transparent;box-shadow:none}
.snt.hl-adopted{border-bottom:1px dashed #e8c418;background:transparent}
.snt.hl-hidden{border-bottom:1px dashed #e8c418;background:transparent;outline:none}
.t-image .imgbox{background:#eef2ff;border:1px solid var(--border);border-radius:8px;overflow:hidden}
.t-image .imgbox img{width:100%;display:block;cursor:zoom-in}
.t-image .imgph{height:200px;display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:13px}
.t-image .cap{font-size:12px;color:var(--muted);margin-top:8px;text-align:center}
.t-image.hl .imgbox{outline:3px solid var(--orange)}
.t-table table{width:100%;border-collapse:collapse;font-size:13px}
.t-table th{background:var(--primary-weak);color:var(--primary);font-weight:700;padding:8px 10px;border:1px solid var(--border);text-align:left}
.t-table td{padding:8px 10px;border:1px solid var(--border);line-height:1.7}
.t-table td.hl-cell{border:2px solid var(--orange)!important;background:#fff8e6;cursor:pointer}
.t-video .vbox{background:#141a26;border-radius:8px;overflow:hidden;position:relative;height:190px}
.t-video .vbox video{width:100%;height:100%;object-fit:cover}
.t-video .play{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:#fff;font-size:34px;cursor:pointer;background:rgba(0,0,0,.25)}
.t-video .play .pg{line-height:1}
.t-video .vph{font-size:12.5px;color:#dbe1ea;text-align:center;padding:0 18px;line-height:1.6;font-weight:400}
.t-video .vbox:not(:has(video)){cursor:pointer}
.t-video .vmeta{font-size:12px;color:var(--muted);margin-top:6px}
.el-note{font-size:11px;color:var(--muted);margin-top:10px;border-top:1px dashed var(--border);padding-top:8px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.el-note .st{padding:1px 8px;border-radius:10px;font-size:11px}
/* 单击选中元素：仅在左侧加一条蓝色细线 + 极淡背景，明确区分于"双击弹窗" */
.el-wrap.selected > .el{border-left:3px solid var(--primary);
  background:rgba(31,95,174,.05);border-radius:3px;padding-left:8px;margin-left:-11px}
.st-adopted{background:#e6f4ea;color:var(--green)}
.st-pending{background:#fff4e0;color:var(--orange)}
.archived{border-style:dashed;background:#fafbfc;color:var(--muted);font-size:12.5px}

#right{background:var(--panel);border-left:1px solid var(--border)}
#right .rf-head{display:flex;gap:6px;margin-bottom:12px;position:sticky;top:0;background:var(--panel);padding:4px 0 8px;z-index:5;border-bottom:1px solid var(--border)}
.rf-tab{flex:1;text-align:center;border:1px solid var(--border);border-radius:8px;padding:5px 0;font-size:12.5px;cursor:pointer;background:#fff}
.rf-tab.on{background:var(--primary);color:#fff;border-color:var(--primary)}
.anno-card{border:1px solid var(--border);border-radius:var(--radius);background:#fff;margin-bottom:12px;overflow:hidden}
.anno-card.flash{outline:2px solid var(--primary)}
.ac-head{display:flex;align-items:center;gap:8px;padding:9px 12px;border-bottom:1px solid var(--border);background:#fbfcfe;flex-wrap:wrap}
.ac-head .avatar{width:26px;height:26px;border-radius:50%;color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0}
.ac-head .nm{font-size:13px;font-weight:700}
.rolechip{font-size:11px;padding:1px 7px;border-radius:10px}
.rc-student{background:#e6f4ea;color:var(--green)}
.rc-expert{background:#eef0fb;color:var(--primary)}
.rc-teacher{background:#fff0e6;color:var(--orange)}
.rc-admin{background:#fdecec;color:var(--red)}
.ac-head .time{margin-left:auto;font-size:11px;color:var(--weak)}
.ac-quote{padding:8px 12px;font-size:12px;color:var(--muted);background:#f8f9fc;border-left:3px solid var(--yellow-strong);line-height:1.6}
.ac-body{padding:10px 12px;font-size:13px;line-height:1.8}
.ac-body .err-tag{display:inline-block;background:#fdecec;color:var(--red);font-size:11px;padding:1px 8px;border-radius:10px;margin-right:6px}
.ac-body .mat-tag{display:inline-block;background:#eef0fb;color:var(--primary);font-size:11px;padding:1px 8px;border-radius:10px;margin-right:6px}
.ac-media{display:flex;gap:8px;flex-wrap:wrap;padding:0 12px 10px}
.ac-media .thumb{width:74px;height:54px;border-radius:6px;border:1px solid var(--border);overflow:hidden;position:relative;display:flex;align-items:center;justify-content:center;background:#f6f8fc;cursor:pointer}
.ac-media .thumb img{width:100%;height:100%;object-fit:cover}
.ac-media .thumb .fi{font-size:22px}
.ac-media .thumb .ft{position:absolute;bottom:0;left:0;right:0;background:rgba(0,0,0,.5);color:#fff;font-size:10px;text-align:center;padding:1px 0}
.ac-status{display:flex;align-items:center;gap:8px;padding:7px 12px;border-top:1px solid var(--border);flex-wrap:wrap}
.stx{font-size:11.5px;padding:2px 10px;border-radius:10px}
.stx-pending{background:#fff4e0;color:var(--orange)}
.stx-adopted{background:#e6f4ea;color:var(--green)}
.stx-rejected{background:#f1f2f4;color:var(--muted);text-decoration:line-through}
.stx-hidden{background:#fdecec;color:var(--red)}
.ac-status .act{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap}
.ac-status .act button{border:1px solid var(--border);background:#fff;border-radius:6px;padding:3px 10px;font-size:12px;cursor:pointer}
.ac-status .act button.adopt{background:var(--green);color:#fff;border-color:var(--green)}
.ac-status .act button.reject{color:var(--red)}
.ac-status .act button.del{color:var(--red)}
.ac-tip{padding:0 12px 10px;font-size:12px;color:var(--green)}
.replies{border-top:1px dashed var(--border);background:#fbfcfe}
.reply{padding:8px 12px 8px 24px;font-size:12.5px;border-bottom:1px dashed var(--border)}
.reply:last-child{border-bottom:none}
.reply .r-head{display:flex;gap:6px;align-items:center;margin-bottom:3px}
.reply .r-head b{font-size:12px}
.reply .r-head .time{margin-left:auto;font-size:10.5px;color:var(--weak)}
.reply-input{padding:8px 12px 12px 24px;display:none;gap:8px}
.reply-input.open{display:flex}
.reply-input input{flex:1;border:1px solid var(--border);border-radius:6px;padding:6px 10px;font-size:12.5px}
.reply-input button{border:none;background:var(--primary);color:#fff;border-radius:6px;padding:6px 12px;font-size:12px;cursor:pointer}
.anno-card.rejected .ac-body{color:var(--muted)}
.anno-card.hidden-card{border-color:var(--red)}
.empty-tip{text-align:center;color:var(--weak);font-size:12.5px;padding:30px 0}

/* 弹层 */
.modal-mask{position:fixed;inset:0;background:rgba(20,26,38,.45);z-index:100;display:none;align-items:center;justify-content:center;padding:20px}
.modal-mask.open{display:flex}

/* 图片 / 视频 灯箱：深色遮罩，点击窗口之外的遮罩区域即可关闭 */
#lightbox{background:rgba(8,10,16,.9);z-index:200;padding:24px;cursor:zoom-out}
#lightbox .lb-wrap{position:relative;max-width:94vw;max-height:92vh;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:default}
#lightbox .lb-media{max-width:94vw;max-height:82vh;border-radius:8px;box-shadow:0 18px 60px rgba(0,0,0,.6);background:#111}
#lightbox .lb-cap{margin-top:14px;color:#e8eaed;font-size:13px;text-align:center;max-width:94vw;line-height:1.6;text-shadow:0 1px 3px rgba(0,0,0,.6)}
#lightbox .lb-close{position:fixed;top:18px;right:22px;width:42px;height:42px;border-radius:50%;background:rgba(255,255,255,.14);color:#fff;font-size:20px;line-height:42px;text-align:center;cursor:pointer;user-select:none;transition:background .15s}
#lightbox .lb-close:hover{background:rgba(255,255,255,.28)}

.modal{background:#fff;border-radius:14px;width:560px;max-width:95vw;max-height:88vh;display:flex;flex-direction:column;box-shadow:0 20px 50px rgba(0,0,0,.2)}
.modal .m-head{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;border-bottom:1px solid var(--border);font-size:15px;font-weight:700}
.modal .m-head span{cursor:pointer;color:var(--muted);font-weight:400;font-size:18px;line-height:1}
.modal .m-body{padding:16px 18px;overflow-y:auto;line-height:1.7}
.modal .m-foot{padding:12px 18px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:10px}
.modal .m-foot button{border:1px solid var(--border);background:#fff;border-radius:8px;padding:7px 16px;font-size:13px;cursor:pointer}
.modal .m-foot button.primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.f-row{margin-bottom:14px}
.f-row label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px}
.f-row textarea,.f-row input[type=text],.f-row select{width:100%;border:1px solid var(--border);border-radius:8px;padding:8px 10px;font-size:13px;font-family:inherit;line-height:1.7}
.f-row textarea{min-height:88px;resize:vertical}
.f-row .hint{font-size:11.5px;color:var(--weak);margin-top:4px}
.seg{display:flex;gap:6px;flex-wrap:wrap}
.seg .seg-item{border:1px solid var(--border);border-radius:8px;padding:5px 12px;font-size:12.5px;cursor:pointer;background:#fff}
.seg .seg-item.on{background:var(--primary-weak);color:var(--primary);border-color:var(--primary);font-weight:700}
.f-row.two{display:flex;gap:12px}
.f-row.two>div{flex:1;min-width:0}
.modal .err{background:#fdecec;color:#e03131;font-size:12.5px;padding:8px 12px;border-radius:8px;margin-bottom:14px}
#regModal .f-row input,#regModal .f-row select{width:100%;border:1px solid var(--border);border-radius:8px;padding:8px 10px;font-size:13px;font-family:inherit}
.checks{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:13px}
.log-item{border:1px solid var(--border);border-radius:8px;padding:10px 12px;margin-bottom:10px;font-size:12.5px}
.log-item .l-head{display:flex;gap:8px;align-items:center;margin-bottom:6px;flex-wrap:wrap}
.log-item .l-head .time{color:var(--weak);font-size:11px;margin-left:auto}
.log-item .diff{background:#f8f9fc;border-radius:6px;padding:8px 10px;line-height:1.7;max-height:160px;overflow:auto}
.log-item .diff .old{color:var(--red)}
.log-item .diff .new{color:var(--green)}
.log-item .reason{margin-top:6px;color:var(--muted);font-size:12px}
.log-item .rb{margin-top:8px}
.log-item .rb button{border:1px solid var(--border);background:#fff;border-radius:6px;padding:3px 10px;font-size:11.5px;cursor:pointer;color:var(--primary)}
.wb-item{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--border);border-radius:8px;padding:10px;margin-bottom:10px}
.wb-item .wb-main{flex:1;font-size:13px}
.wb-item .wb-q{font-size:11.5px;color:var(--muted);background:#f8f9fc;border-radius:6px;padding:4px 8px;margin-bottom:5px}
.export-opt{border:1px solid var(--border);border-radius:10px;padding:12px 14px;margin-bottom:12px}
.export-opt .eo-t{font-weight:700;font-size:13.5px;margin-bottom:8px}
.progress{height:8px;background:#eef0f4;border-radius:4px;overflow:hidden;margin-top:10px;display:none}
.progress .pin{height:100%;background:linear-gradient(90deg,var(--primary),var(--purple));width:0%;transition:width .25s}
.storage-tag{font-size:11px;padding:1px 7px;border-radius:10px;background:#e6f4ea;color:var(--green)}
.storage-tag.local{background:#fff4e0;color:var(--orange)}

#toasts{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:200;display:flex;flex-direction:column;gap:8px;align-items:center}
.toast{background:#24292f;color:#fff;border-radius:10px;padding:10px 18px;font-size:13px;box-shadow:0 6px 20px rgba(0,0,0,.25);animation:pop .2s;max-width:80vw}
@keyframes pop{from{transform:translateY(8px);opacity:0}to{transform:none;opacity:1}}
#drawerBtn{display:none;position:fixed;bottom:20px;right:20px;z-index:80;background:var(--primary);color:#fff;border:none;border-radius:24px;padding:10px 18px;font-size:13px;box-shadow:0 6px 18px rgba(53,86,201,.4);cursor:pointer}

/* ============ 首页整洁化：默认隐藏排行榜条 ============ */
body.no-rank #rankbar{display:none}
body.no-rank #topbar{height:56px}
body.no-rank #layout{top:56px}

/* ============ 书籍模式（隐藏左侧目录列，改为悬浮目录按钮） ============ */
#tocBtn{display:none;position:fixed;top:64px;left:16px;z-index:70;background:var(--panel);
  color:var(--text);border:1px solid var(--border);border-radius:20px;padding:7px 15px;
  font-size:13px;box-shadow:0 4px 14px rgba(16,24,40,.16);cursor:pointer}
#tocBtn:hover{border-color:var(--primary);color:var(--primary)}
#btnBookMode.on{background:var(--primary);border-color:var(--primary);color:#fff}
body.book-mode #layout{grid-template-columns:74% 26%}
body.book-mode #left{display:none}
body.book-mode #left.open{display:block;position:fixed;top:56px;bottom:0;left:0;width:300px;
  z-index:70;overflow-y:auto;box-shadow:0 0 30px rgba(0,0,0,.18)}
body.book-mode #tocBtn{display:block}

/* ============ 排行榜页面（点「📊 排行榜」打开） ============ */
.rk-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.rk-t{border:1px solid var(--border);background:#fff;border-radius:20px;padding:5px 14px;
  font-size:13px;cursor:pointer;white-space:nowrap;color:var(--muted)}
.rk-t:hover{border-color:var(--primary);color:var(--primary)}
.rk-t.on{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:700}
.rk-list{list-style:none;max-height:52vh;overflow:auto;border:1px solid var(--border);border-radius:10px}
.rk-list li{display:flex;align-items:center;gap:10px;padding:9px 14px;border-bottom:1px dashed var(--border);font-size:13px}
.rk-list li:last-child{border-bottom:none}
.rk-list li .no{width:22px;text-align:center;font-weight:700;color:var(--muted)}
.rk-list li .nm{flex:1}
.rk-list li .pt{color:var(--primary);font-weight:700}

@media (max-width:960px){
  #topbar{height:88px}
  #layout{top:88px;grid-template-columns:1fr}
  body.no-rank #topbar{height:48px}
  body.no-rank #layout{top:48px}
  body.no-rank #left{top:48px}
  body.book-mode #layout{grid-template-columns:1fr}
  /* 移动端左栏本就是抽屉，书籍模式不再隐藏，避免与「☰ 目录」冲突 */
  body.book-mode #left{display:block}
  body.book-mode #left.open{top:48px}
  /* 移动端沿用 brandbar 自带的 ☰ 目录，避免与悬浮目录按钮重复 */
  body.book-mode #tocBtn{display:none}
  #brandbar h1{font-size:13px}
  #brandbar .book-tag{display:none}
  #mobileBtn{display:inline-block}
  #left{position:fixed;top:88px;bottom:0;left:0;width:280px;z-index:70;transform:translateX(-100%);transition:transform .2s;box-shadow:0 0 30px rgba(0,0,0,.15)}
  #left.open{transform:none}
  #center{width:100%}
  #right{position:fixed;bottom:0;left:0;right:0;top:auto;height:0;transition:height .25s;border-left:none;border-top:1px solid var(--border);z-index:75;padding:0}
  #right.open{height:62vh;padding:14px}
  #drawerBtn{display:block}
  .el-bar{opacity:1}
}

/* ============ 头像通用：有图片时用图片填充 ============ */
.avatar{overflow:hidden}
.avatar img{width:100%;height:100%;object-fit:cover;display:block}
/* 批注作者头像的悬停热区（作为独立 span 时需保持原有尺寸） */
.ava-wrap{display:inline-flex;flex:none;cursor:pointer}
.ava-wrap .avatar{width:26px;height:26px;font-size:12px;font-weight:700}
.ac-head .nm{cursor:pointer}

/* ============ 个人中心 ============ */
.user-chip{cursor:pointer;padding:4px 7px;border-radius:10px;transition:background .15s}
.user-chip:hover{background:var(--primary-weak)}
.user-chip .chip-links{display:flex;gap:8px;align-items:center}
.user-chip .chip-links a{color:var(--link,#2b6cb0);text-decoration:none;font-size:12px;font-weight:600}
.user-chip .chip-links a:hover{text-decoration:underline}
#profModal .f-row input,#profModal .f-row select{width:100%;border:1px solid var(--border);border-radius:8px;padding:8px 10px;font-size:13px;font-family:inherit}
#profModal .f-row input[disabled]{background:#f6f8fb;color:var(--muted);cursor:not-allowed}
.prof-tabs{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:16px}
.pt-item{padding:8px 14px;font-size:13px;cursor:pointer;border-bottom:2px solid transparent;color:var(--muted);white-space:nowrap}
.pt-item:hover{color:var(--primary)}
.pt-item.on{color:var(--primary);border-bottom-color:var(--primary);font-weight:700}
.modal .ok{background:#e9f7ef;color:#2f9e44;font-size:12.5px;padding:8px 12px;border-radius:8px;margin-bottom:14px}
.avatar-edit{display:flex;gap:16px;align-items:flex-start;flex-wrap:wrap}
.avatar.lg{width:84px;height:84px;border-radius:50%;font-size:32px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;background:#3556c9;flex:none}
.priv-list{margin-top:4px}
.priv-item{display:flex;align-items:center;gap:10px;padding:9px 11px;border:1px solid var(--border);border-radius:8px;margin-bottom:8px;font-size:13px}
.priv-item .pn{flex:1;min-width:0}
.priv-item .pd{font-size:11.5px;color:var(--weak)}
/* 开关 */
.sw{position:relative;width:40px;height:22px;flex:none}
.sw input{opacity:0;width:0;height:0;position:absolute}
.sw .sl{position:absolute;inset:0;background:#d7dbe3;border-radius:22px;cursor:pointer;transition:background .18s}
.sw .sl:before{content:'';position:absolute;width:18px;height:18px;left:2px;top:2px;background:#fff;border-radius:50%;transition:transform .18s}
.sw input:checked+.sl{background:var(--primary)}
.sw input:checked+.sl:before{transform:translateX(18px)}

/* ============ 元素编辑：尺寸与封面 ============ */
.media-opts{display:none;border:1px solid var(--border);border-radius:10px;
  padding:12px 14px;margin-bottom:14px;background:#fbfcfe}
.media-opts .mo-title{font-size:12.5px;font-weight:700;color:var(--primary);margin-bottom:12px}
.media-opts .f-row:last-child{margin-bottom:0}
.poster-preview{display:none;width:160px;height:90px;object-fit:cover;
  border:1px solid var(--border);border-radius:8px;background:#f6f8fb;margin-bottom:8px}
/* 图片 / 视频按自定义尺寸渲染 */
.t-image .imgbox{margin-left:auto;margin-right:auto}
.t-image .imgbox img{display:block;width:100%}
.t-image .cap{text-align:center}
.t-video .vbox{margin-left:auto;margin-right:auto}
.t-video .vbox video{display:block;width:100%;height:100%}

/* ============ 消息铃铛 ============ */
.bell-btn{position:relative;border:1px solid var(--border);background:#fff;border-radius:8px;
  padding:6px 10px;font-size:14px;cursor:pointer;line-height:1;white-space:nowrap}
.bell-btn:hover{border-color:var(--primary)}
.bell-badge{position:absolute;top:-6px;right:-6px;min-width:17px;height:17px;padding:0 4px;
  background:#e03131;color:#fff;border-radius:9px;font-size:11px;line-height:17px;
  text-align:center;font-weight:700;box-shadow:0 0 0 2px #fff}
.bell-btn.ring{animation:bellRing .9s ease}
@keyframes bellRing{0%,100%{transform:rotate(0)}20%{transform:rotate(-12deg)}
  40%{transform:rotate(10deg)}60%{transform:rotate(-8deg)}80%{transform:rotate(6deg)}}

/* ============ 消息列表 ============ */
.msg-head{display:flex;justify-content:space-between;align-items:center;
  margin-bottom:10px;gap:10px}
.msg-list{max-height:46vh;overflow:auto}
.msg-item{display:flex;gap:10px;padding:10px 11px;border:1px solid var(--border);
  border-radius:9px;margin-bottom:8px;cursor:pointer;position:relative;background:#fff}
.msg-item:hover{border-color:var(--primary);background:#f8faff}
.msg-item.unread{background:#f2f7ff;border-color:#c7dbff}
.mi-av{width:34px;height:34px;border-radius:50%;flex:none;overflow:hidden;
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;
  font-size:14px;background:#3556c9}
.mi-av img{width:100%;height:100%;object-fit:cover}
.mi-body{flex:1;min-width:0}
.mi-top{display:flex;align-items:center;gap:6px;font-size:12.5px}
.mi-top b{color:#24292f}
.mi-role{font-size:11px;color:var(--muted)}
.mi-time{margin-left:auto;font-size:11px;color:var(--weak);flex:none}
.mi-txt{font-size:12.5px;color:#374151;margin-top:3px;line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.mi-type{display:inline-block;background:var(--primary-weak);color:var(--primary);
  border-radius:5px;padding:0 6px;font-size:11px;margin-right:6px}
.mi-loc{font-size:11.5px;color:var(--muted);margin-top:4px}
.mi-dot{position:absolute;top:12px;right:10px;width:8px;height:8px;border-radius:50%;background:#e03131}

/* ============ 尺寸快捷设置（悬停按钮 + 浮层） ============ */
.t-image .imgbox{position:relative}
.size-btn{position:absolute;right:8px;bottom:8px;opacity:0;transition:opacity .15s;
  background:rgba(20,26,38,.8);color:#fff;border:none;border-radius:8px;padding:5px 10px;
  font-size:12px;cursor:pointer;z-index:2}
.t-image .imgbox:hover .size-btn,.t-video .vbox:hover .size-btn{opacity:1}
.size-pop{position:fixed;z-index:320;display:none;width:236px;background:#fff;
  border:1px solid var(--border);border-radius:10px;
  box-shadow:0 14px 34px rgba(0,0,0,.18);padding:12px}
.size-pop .sp-title{font-size:12.5px;font-weight:700;color:var(--primary);margin-bottom:10px}
.size-pop .sp-row{margin-bottom:9px}
.size-pop .sp-row label{display:block;font-size:11.5px;color:var(--muted);margin-bottom:4px}
.size-pop .sp-row select,.size-pop .sp-row input{width:100%;border:1px solid var(--border);
  border-radius:7px;padding:6px 8px;font-size:12.5px;font-family:inherit}
.size-pop .sp-foot{display:flex;justify-content:flex-end;gap:8px;margin-top:12px}
.size-pop .sp-foot button{border:1px solid var(--border);background:#fff;border-radius:7px;
  padding:6px 14px;font-size:12.5px;cursor:pointer}
.size-pop .sp-foot button.primary{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ============ 用户名片（悬停） ============ */
.user-card{position:fixed;z-index:300;width:296px;background:#fff;border:1px solid var(--border);
  border-radius:12px;box-shadow:0 12px 32px rgba(0,0,0,.16);padding:14px;font-size:12.5px;
  line-height:1.6;pointer-events:none}
.user-card .uc-top{display:flex;gap:10px;align-items:center;margin-bottom:10px}
.user-card .avatar{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;
  justify-content:center;color:#fff;font-weight:700;font-size:18px;flex:none}
.user-card .uc-name{font-size:14.5px;font-weight:700;color:#24292f}
.user-card .uc-role{font-size:11.5px;color:var(--muted)}
.user-card .uc-row{display:flex;gap:8px;margin-top:5px}
.user-card .uc-k{color:var(--weak);width:74px;flex:none}
.user-card .uc-v{flex:1;color:#24292f;word-break:break-all}
.user-card .uc-stats{display:flex;gap:12px;margin-top:10px;padding-top:9px;
  border-top:1px solid var(--border);font-size:11.5px;color:var(--muted);flex-wrap:wrap}
.user-card .uc-stats b{color:#24292f;font-size:12.5px}
.user-card .uc-loading{color:var(--muted);text-align:center;padding:10px 0}
.user-card .uc-empty{color:var(--weak);text-align:center;padding:6px 0;font-size:12px}
.user-card .uc-actions{display:flex;gap:10px;margin-top:9px;padding-top:9px;
  border-top:1px solid var(--border)}
.user-card .uc-actions a{font-size:12.5px;color:var(--link,#2b6cb0);text-decoration:none;
  font-weight:600}
.user-card .uc-actions a:hover{text-decoration:underline}

/* 首页右上角：用户名下的日志 / 相册入口 */
.ubox{display:flex;flex-direction:column;align-items:flex-end;gap:2px;font-size:13px;color:#24292f}
.ubox .uname{font-weight:700;line-height:1.2}
.ubox .ulinks{display:flex;gap:10px;align-items:center}
.ubox .ulinks a{color:var(--link,#2b6cb0);text-decoration:none;font-size:12.5px}
.ubox .ulinks a:hover{text-decoration:underline}
.ubox .link-btn{background:none;border:none;color:#e0533d;cursor:pointer;font-size:12.5px;padding:0}

/* ================= 做题环节（任务巩固）—— 与书籍模式正文风格一致 ================= */
.ex-panel{
  margin:0 auto 40px;max-width:860px;            /* 与书页同宽、居中 */
  background:#fffdf6;                            /* 暖白纸面，同 .book-page */
  box-shadow:0 8px 30px rgba(70,50,15,.18);
  border-radius:2px;
  padding:40px 60px 50px;
  font-family:"Songti SC","SimSun","Noto Serif SC","Source Han Serif SC",serif; /* 宋体正文 */
  color:#1a1a1a;line-height:1.95;
}
.ex-head{display:flex;align-items:center;gap:12px;justify-content:center;position:relative;
  padding:0 0 16px;margin-bottom:24px;border-bottom:2px solid #1f5fae;text-align:center}
.ex-title{font-family:"Microsoft YaHei","微软雅黑","PingFang SC",sans-serif;
  font-weight:700;font-size:23px;color:#1f5fae;letter-spacing:1px}
.ex-meta{font-size:13px;color:#9a9384}
.ex-head .ex-btn{position:absolute;right:0;top:50%;transform:translateY(-50%)}
.ex-sec{padding:0}
.ex-sec h4{margin:28px 0 14px;font-family:"Microsoft YaHei","微软雅黑","PingFang SC",sans-serif;
  font-size:18px;font-weight:700;color:#1f5fae;padding:0 0 0 14px;border-left:4px solid #1f5fae}
.ex-card{border:none;border-bottom:1px solid #e7dcc6;padding:16px 0;margin-bottom:6px;background:transparent}
.ex-q{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px}
.ex-qno{font-family:"Microsoft YaHei","微软雅黑","PingFang SC",sans-serif;font-weight:700;font-size:14.5px;color:#1f5fae}
.ex-pts{font-size:12px;color:#9a9384}
.ex-stem{font-size:16px;line-height:1.95;color:#1a1a1a;margin-bottom:12px;white-space:normal}
.ex-input{display:flex;flex-direction:column;gap:8px}
.ex-opt{display:block;padding:7px 12px;border:1px solid #e7dcc6;border-radius:8px;cursor:pointer;
  font-size:15px;line-height:1.7;color:#1a1a1a;transition:background .12s}
.ex-opt:hover{background:#f1f5ff}
.ex-opt input{margin-right:6px}
.ex-opt.ro{cursor:default}
.ex-opt.correct{background:#e6f9ec;border-color:#2f9e44;color:#2b8a3e}
.ex-opt.wrong{background:#ffe9e9;border-color:#e03131;color:#c92a2a}
.ex-opt .ex-mark{float:right;font-weight:800;font-family:"Microsoft YaHei","微软雅黑",sans-serif}
.ex-optlist{display:flex;flex-direction:column;gap:8px;margin-bottom:8px}
.ex-ans{width:100%;border:1px solid #e7dcc6;border-radius:8px;padding:8px 10px;font-size:15px;
  font-family:inherit;resize:vertical;box-sizing:border-box;background:#fffdf6;color:#1a1a1a}
.ex-ans:focus{outline:none;border-color:#1f5fae}
.ex-submit{margin-top:4px}
.ex-btn{background:#1f5fae;color:#fff;border:none;border-radius:8px;padding:7px 15px;font-size:13px;cursor:pointer;
  font-family:"Microsoft YaHei","微软雅黑","PingFang SC",sans-serif}
.ex-btn:hover{background:#174a86}
.ex-btn.ghost{background:#fff;color:#1f5fae;border:1px solid #c6d2f5;margin-top:8px;padding:5px 12px}
.ex-btn.ghost:hover{background:#f1f5ff}
.ex-mine{background:#f5f8ff;border:1px solid #e0e9ff;border-radius:8px;padding:9px 12px;margin-bottom:8px}
.ex-mine-label{font-size:12px;color:#6b7280;margin-bottom:3px}
.ex-mine-ans{font-size:15px;color:#1a1a1a;white-space:pre-wrap;line-height:1.7}
.ex-status{margin-top:6px;font-size:13px;font-weight:700}
.ex-status.wait{color:#e8890c}
.ex-status.ok{color:#2f9e44}
.ex-status.bad{color:#e03131}
.ex-fb{margin-top:6px;font-size:13px;color:#374151;background:#fff8e6;border-left:3px solid #ffd43b;padding:6px 10px;border-radius:6px}
.ex-sol{margin-top:8px;font-size:13px;color:#374151}
.ex-sol summary{cursor:pointer;color:#1f5fae;font-weight:600}
.ex-answer{margin-top:6px}
.ex-analysis{margin-top:4px}
/* 批改弹层 */
.g-summary{font-size:12.5px;color:#6b7280;margin-bottom:10px}
.g-ex{border:1px solid #eef1f6;border-radius:10px;padding:10px 12px;margin-bottom:12px}
.g-ex-head{font-weight:700;font-size:13px;color:#1f3a8a;margin-bottom:8px}
.g-row{display:flex;gap:10px;align-items:flex-start;padding:8px 0;border-top:1px dashed #eef1f6;flex-wrap:wrap}
.g-stu{min-width:72px;font-weight:600;font-size:13px;color:#24292f}
.g-ans{flex:1;min-width:160px;font-size:13px;line-height:1.6;color:#374151;white-space:pre-wrap;word-break:break-word}
.g-grade{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.g-score{width:64px;border:1px solid #d6dce6;border-radius:7px;padding:5px 7px;font-size:13px}
.g-fb{flex:1;min-width:120px;border:1px solid #d6dce6;border-radius:7px;padding:5px 8px;font-size:13px}
.g-done{font-size:12px;color:#2f9e44;font-weight:700;width:100%;text-align:right}

/* 批注附件：选择文件按钮 + 上传进度条 */
.upl-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.btn-file{border:1px solid var(--border);background:#fff;border-radius:8px;padding:7px 14px;font-size:12.5px;cursor:pointer;color:var(--text);white-space:nowrap}
.btn-file:hover{border-color:var(--primary);color:var(--primary)}
.btn-file:disabled{opacity:.55;cursor:not-allowed}
.upl-name{margin:0;font-size:12px;color:var(--muted);word-break:break-all}
.upl-progress{display:flex;align-items:center;gap:10px;margin-top:8px}
.upl-bar{flex:1;height:6px;background:#eef0f4;border-radius:3px;overflow:hidden}
.upl-fill{height:100%;width:0;background:linear-gradient(90deg,var(--primary),var(--purple));border-radius:3px;transition:width .15s}
.upl-pct{font-size:11.5px;color:var(--muted);min-width:64px;text-align:right;white-space:nowrap}
.btn-file.btn-upl-go:not(:disabled){border-color:var(--primary);color:var(--primary);font-weight:600}

/* ================ 任务三主编（学校/企业/行业） ================ */
.task-editors{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:12px 0 6px;justify-content:center}
.te{display:flex;align-items:center;gap:8px;padding:6px 14px 6px 8px;border-radius:999px;
    background:#faf8f3;border:1px solid #eae3d5;min-height:36px}
.te .avatar{width:24px;height:24px;font-size:12px;border-radius:50%}
.te-role{font-size:12px;font-weight:700;padding:3px 9px;border-radius:999px;color:#fff;white-space:nowrap}
.te-school .te-role{background:#4d8ef7}
.te-enterprise .te-role{background:#e8890c}
.te-industry .te-role{background:#2f9e44}
.te-name{font-weight:600;font-size:13.5px}
.te-org{font-size:12px;color:#8a8375;max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.te-empty{font-size:12.5px;color:#b8b0a0}
.te-set{margin-left:6px;border:1px dashed #c9c0ae;background:transparent;color:#8a8375;
        border-radius:999px;padding:6px 14px;font-size:12.5px;cursor:pointer}
.te-set:hover{border-color:var(--primary);color:var(--primary)}
.te-row{display:flex;align-items:center;gap:12px;margin:12px 0}
.te-row .te-role{flex:0 0 84px;text-align:center}
.te-row select{flex:1;height:36px;padding:0 10px;border:1px solid #ddd6c8;border-radius:8px;background:#fff;font-size:14px}