[hidden]{display:none!important}
:root{--green:#147b69;--ink:#243638;--muted:#819093;--line:#e3e9e9;--cream:#f9f5df}*{box-sizing:border-box}body{margin:0;background:#f3f5f7;color:var(--ink);font:15px/1.6 "Segoe UI","Microsoft YaHei",sans-serif}h1{font-size:28px;margin:0}h2{font-size:19px;margin:0 0 20px}h3{margin:0 0 12px}a{color:var(--green);text-decoration:none}button,input,select,textarea{font:inherit}button,.button{display:inline-block;border:1px solid var(--line);border-radius:7px;background:#fff;padding:9px 17px;cursor:pointer;color:var(--ink)}button:hover,.button:hover{border-color:var(--green);color:var(--green)}button:disabled{opacity:.5;cursor:wait}.primary{background:var(--green);border-color:var(--green);color:#fff}.primary:hover{background:#116352;color:white}.link{padding:0;border:0;background:none;color:var(--green)}header{height:76px;background:white;border-bottom:1px solid var(--line);display:flex;gap:32px;align-items:center;padding:0 28px;position:sticky;top:0;z-index:10}.brand{font-size:22px;font-weight:700;color:var(--ink);display:flex;align-items:center;gap:12px}.brand b{background:var(--green);color:white;border-radius:9px;padding:0 12px;font-size:28px}.header-right{margin-left:auto;display:flex;gap:28px;align-items:center}.header-right form{margin:0}aside{position:fixed;top:76px;bottom:0;width:220px;background:white;border-right:1px solid var(--line);padding:24px 14px;transition:width .15s}aside a{display:flex;gap:15px;padding:14px 18px;margin:8px 0;border-radius:7px;color:var(--ink);font-size:17px}aside a.active{background:#e5f3ee;color:var(--green);font-weight:700}aside a b{width:18px}aside small{position:absolute;bottom:24px;left:26px;color:var(--muted)}.nav-heading{display:flex;justify-content:space-between;align-items:center;color:var(--muted);padding-left:14px}.nav-heading button{padding:3px 9px}#workspace{margin-left:220px;padding:32px;transition:margin .15s}.collapsed aside{width:76px}.collapsed aside span,.collapsed aside small{display:none}.collapsed aside a{padding:14px}.collapsed .nav-heading{padding:0}.collapsed #workspace{margin-left:76px}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px}.muted{color:var(--muted)}.small{font-size:13px}.eyebrow{color:var(--green);letter-spacing:2px}.card{background:white;border-radius:12px;padding:24px;margin-bottom:22px;border:1px solid #edf0f1}.filters{display:flex;gap:18px;align-items:end;flex-wrap:wrap}.filters label{margin:0;flex:1;min-width:150px}.filters button{height:44px}label{display:block;margin-bottom:18px;color:#627477;font-size:14px}input,select,textarea{display:block;width:100%;margin-top:7px;border:1px solid #dce4e6;background:white;border-radius:5px;padding:10px 12px;color:var(--ink)}input:focus,textarea:focus,select:focus{outline:2px solid #97cbbf;outline-offset:1px}textarea{min-height:130px;resize:vertical}input[type=file]{font-size:13px}table{width:100%;border-collapse:collapse}th{text-align:left;color:#738386;background:#f7f9f9;font-weight:500}th,td{padding:16px 12px;border-bottom:1px solid var(--line);vertical-align:middle}td .small{display:block}td.actions{min-width:160px}.actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.badge{display:inline-block;padding:3px 9px;border-radius:4px;background:#e6f3ee;color:var(--green);font-size:13px}.badge.pending{background:#fff2d7;color:#a7771c}.empty{text-align:center;padding:60px;color:var(--muted)}.pager{display:flex;justify-content:end;gap:12px;margin-top:20px}.editor-grid{display:grid;grid-template-columns:210px minmax(320px,1fr) minmax(260px,.75fr);gap:18px;align-items:start}.editor-grid .card{padding:20px}.page-list{max-height:580px;overflow:auto}.page-item{display:block;width:100%;text-align:left;border:0;background:transparent;margin-bottom:7px;padding:12px}.page-item.active{background:#e5f3ee;color:var(--green)}.page-item small{display:block}.two-columns{display:grid;grid-template-columns:1fr 1fr;gap:16px}.board{background:#204d42;color:var(--cream);border-radius:9px;padding:24px;min-height:280px;overflow-wrap:anywhere}.board p{white-space:pre-wrap;font-size:20px;line-height:1.7}.board img{width:100%;max-height:300px;object-fit:contain;margin-bottom:14px}.preview-wide{max-width:1000px;margin:auto}.preview-wide .board{min-height:450px}details{border-top:1px solid var(--line);padding:15px 0}summary{cursor:pointer;font-weight:600}details label:first-of-type{margin-top:12px}.notes{white-space:pre-wrap}.error,#notice.error{color:#b34242;background:#fff0f0}#notice{padding:13px 18px;background:#e5f3ee;border:1px solid #bedbd2;border-radius:8px;margin-bottom:20px;white-space:pre-wrap}dialog{border:1px solid var(--line);border-radius:14px;width:500px;max-width:90vw;padding:28px;box-shadow:0 20px 80px #1233}dialog::backdrop{background:#132c3d66}.login-body{min-height:100vh;display:grid;place-items:center;background:radial-gradient(ellipse at top left,#d9eee6,transparent 60%),#f4f6f6}.login-card{width:440px;max-width:92vw;background:white;padding:42px;border-radius:18px;box-shadow:0 20px 70px #2342}.login-card h1{margin:22px 0 6px}.login-card form{margin-top:26px}.login-card .primary{width:100%}.import-summary{display:flex;gap:20px;margin:18px 0}.warning{color:#a7771c}pre{white-space:pre-wrap;font:13px/1.5 monospace}.table-scroll{overflow:auto}@media(max-width:1150px){.editor-grid{grid-template-columns:180px 1fr}.editor-preview{grid-column:2}.header-right{gap:10px}header{gap:15px}}@media(max-width:760px){aside{width:76px}aside span,aside small{display:none}#workspace{margin-left:76px;padding:16px}.editor-grid{grid-template-columns:1fr}.editor-preview{grid-column:auto}.page-heading{align-items:start;flex-direction:column}header>.muted,.brand span{display:none}.two-columns{grid-template-columns:1fr}}

/* 预览目录与编辑器使用相同页面卡片；目录独立滚动，右侧保留足够的阅读宽度。 */
.preview-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 24px; align-items: start; }
.preview-navigation { position: sticky; top: 100px; padding: 20px; }
.preview-navigation .page-list { max-height: calc(100vh - 220px); min-height: 120px; overflow-y: auto; scrollbar-gutter: stable; }
.preview-navigation .page-item { overflow-wrap: anywhere; }
.preview-navigation .page-item:focus-visible { outline: 2px solid var(--green); outline-offset: -2px; }
.preview-content { min-width: 0; }
.preview-content .board { min-height: 450px; }
@media (max-width: 1000px) { .preview-layout { grid-template-columns: 190px minmax(0, 1fr); gap: 16px; } }
@media (max-width: 760px) { .preview-layout { grid-template-columns: minmax(0, 1fr); } .preview-navigation { position: static; } .preview-navigation .page-list { max-height: 240px; } }

/* 文件框只表示本次选择；缩略图与状态反映真正绑定在页面上的图片。 */
.upload-thumbnail img { display: block; max-width: 100%; max-height: 160px; object-fit: contain; border-radius: 6px; margin: 12px 0; }

/* 当前版本不可重复选择，禁用按钮用灰色明确表达。 */
button:disabled { background: #edf0f1; color: #8a969b; border-color: #dfe5e7; cursor: not-allowed; opacity: 1; }

/* 提示词编辑与课程后台共用视觉样式；分类切换不刷新页面或丢失输入。 */
.prompt-layout{display:grid;grid-template-columns:210px minmax(0,1fr);gap:20px;align-items:start}
.prompt-nav{display:flex;flex-direction:column;gap:8px;position:sticky;top:100px}
.prompt-nav button{text-align:left;width:100%}
.prompt-panel{min-width:0}.prompt-panel textarea{width:100%;resize:vertical;line-height:1.65}
.prompt-panel details{padding:16px 0;border-bottom:1px solid #dce5e4}.prompt-panel summary{cursor:pointer;font-weight:600;margin-bottom:14px}
.prompt-tool{padding:16px 0;border-bottom:1px solid #dce5e4}.prompt-json{font-family:Consolas,monospace}
.prompt-savebar{position:sticky;bottom:0;display:flex;align-items:center;justify-content:flex-end;gap:12px;padding:16px;background:#fff;border:1px solid #dce5e4;border-radius:12px;margin-top:20px;z-index:2}
.prompt-savebar .muted{margin-right:auto}@media(max-width:900px){.prompt-layout{grid-template-columns:1fr}.prompt-nav{position:static;flex-direction:row;flex-wrap:wrap}.prompt-nav button{width:auto}.prompt-savebar{flex-wrap:wrap}}