:root{color-scheme:light;--bg: #f6f7f4;--surface: #ffffff;--surface-soft: #f1f5f4;--ink: #1d2733;--muted: #667485;--line: #dbe3e1;--accent: #0f766e;--accent-soft: #d9f2ee;--blue: #2563eb;--amber: #b45309;--green: #15803d;--shadow: 0 18px 45px rgba(31, 45, 61, .08);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{background:var(--bg);color:var(--ink);overflow:hidden}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.58}button:focus-visible,input:focus-visible,.item-row:focus-visible{outline:3px solid rgba(37,99,235,.28);outline-offset:2px}.app-shell{display:flex;height:100vh;min-height:100vh;flex-direction:column;overflow:hidden}.topbar{flex:0 0 auto;z-index:20;display:grid;grid-template-columns:auto minmax(260px,1fr) auto;gap:12px;align-items:center;padding:14px 20px 12px;border-bottom:1px solid var(--line);background:#f6f7f4f0;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.brand{display:inline-flex;align-items:center;gap:10px;min-width:176px}.brand strong,.brand small{display:block;line-height:1.15}.brand strong{font-size:18px}.brand small{margin-top:3px;color:var(--muted);font-size:12px}.brand-mark{display:grid;width:40px;height:40px;place-items:center;border:1px solid rgba(15,118,110,.22);border-radius:8px;background:var(--accent-soft);color:var(--accent)}.search-box{display:flex;min-width:0;align-items:center;gap:9px;height:42px;padding:0 13px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--muted)}.search-box input{width:100%;min-width:0;border:0;outline:0;background:transparent;color:var(--ink)}.mode-tabs{display:flex;grid-column:1 / -1;gap:8px;overflow-x:auto;padding-top:2px}.mode-tabs button,.text-button,.primary-button{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:36px;border-radius:8px;white-space:nowrap}.mode-tabs button{border:1px solid var(--line);background:var(--surface);color:var(--muted);padding:0 13px}.mode-tabs button.active{border-color:#0f766e4d;background:var(--accent);color:#fff}.stats-strip{grid-column:3;grid-row:1;display:inline-flex;align-items:center;justify-content:flex-end;gap:8px;color:var(--muted);font-size:13px}.stats-strip span{padding:5px 8px;border:1px solid var(--line);border-radius:8px;background:#ffffffb3}.workspace{display:grid;grid-template-columns:260px minmax(310px,440px) minmax(0,1fr);gap:16px;width:min(1480px,100%);min-height:0;flex:1 1 auto;margin:0 auto;padding:16px 20px 24px;overflow:hidden}.filter-panel,.list-panel,.detail-panel{min-width:0;border:1px solid var(--line);border-radius:8px;background:var(--surface);box-shadow:var(--shadow)}.filter-panel{align-self:start;height:100%;max-height:none;overflow:auto;padding:14px}.list-panel,.detail-panel{height:100%;min-height:0;overflow:auto}.panel-heading{position:sticky;top:0;z-index:3;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:13px 14px;border-bottom:1px solid var(--line);background:var(--surface);font-size:14px;font-weight:700}.panel-heading>span:first-child{display:inline-flex;align-items:center;gap:7px}.count-pill{min-width:32px;padding:3px 8px;border-radius:999px;background:var(--surface-soft);color:var(--muted);text-align:center;font-size:12px}.category-list{display:grid;gap:6px;padding:12px 0}.category-list button{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;min-height:36px;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--muted);padding:7px 9px;text-align:left}.category-list button:hover,.category-list button.active{border-color:#0f766e3d;background:var(--accent-soft);color:var(--accent)}.category-list button span:first-child,.recent-link,.related-link span,.item-main h2{min-width:0;overflow-wrap:anywhere}.side-section{border-top:1px solid var(--line);padding-top:14px}.side-section h2{margin:0 0 8px;color:var(--muted);font-size:13px}.muted,.source-note p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}.recent-link,.related-link{display:flex;width:100%;align-items:center;justify-content:space-between;gap:8px;border:0;border-radius:8px;background:transparent;color:var(--ink);padding:8px 6px;text-align:left}.recent-link:hover,.related-link:hover{background:var(--surface-soft);color:var(--accent)}.item-row{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;min-height:112px;border-bottom:1px solid var(--line);padding:14px}.item-row:hover,.item-row.active{background:var(--surface-soft)}.item-row.active{box-shadow:inset 4px 0 0 var(--accent)}.item-main{min-width:0}.item-main h2{margin:0;font-size:16px;line-height:1.45}.item-main p{display:-webkit-box;margin:8px 0 0;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:2;color:var(--muted);font-size:13px;line-height:1.55}.meta-line{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px;color:var(--muted);font-size:12px}.meta-line span{border:1px solid var(--line);border-radius:999px;background:#ffffffad;padding:3px 7px}.row-actions,.detail-actions{display:inline-flex;flex-shrink:0;gap:6px}.row-actions{flex-wrap:wrap;justify-content:flex-end;max-width:78px}.icon-button{display:inline-grid;width:36px;height:36px;place-items:center;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--muted)}.icon-button:hover,.icon-button.selected{border-color:#0f766e47;background:var(--accent-soft);color:var(--accent)}mark{border-radius:4px;background:#fde68a;color:#78350f;padding:0 2px}.mobile-only{display:none}.mobile-detail-bar{align-items:center;justify-content:space-between;gap:10px;border-bottom:1px solid var(--line);background:var(--surface);padding:10px 12px}.mobile-detail-bar>span{min-width:0;color:var(--muted);font-size:13px;font-weight:700}.detail-content{max-width:880px;margin:0 auto;padding:22px}.detail-kicker{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px;color:var(--muted);font-size:12px}.detail-kicker span{border:1px solid var(--line);border-radius:999px;padding:4px 8px}.detail-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.detail-content h1{margin:0;overflow-wrap:anywhere;font-size:26px;line-height:1.35;letter-spacing:0}.tag-row{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}.tag-row span{border:1px solid rgba(37,99,235,.2);border-radius:999px;background:#edf4ff;color:var(--blue);padding:4px 8px;font-size:12px}.lead-text{margin:16px 0 0;color:var(--muted);font-size:15px;line-height:1.75}.study-toolbar{position:sticky;top:0;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;border:1px solid var(--line);border-radius:8px;background:#fffffff5;padding:10px;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.study-progress{display:flex;min-width:132px;flex-direction:column;gap:4px;color:var(--muted);font-size:12px}.study-progress strong{color:var(--ink);font-size:14px}.study-controls{display:flex;min-width:0;flex-wrap:wrap;justify-content:flex-end;gap:8px}.answer-gate,.empty-state,.bootstrap-error{display:grid;place-items:center;min-height:220px;border:1px dashed #cbd7d5;border-radius:8px;margin-top:18px;padding:22px;background:#fbfcfa;text-align:center}.answer-gate h2,.empty-state h2,.bootstrap-error h1{margin:10px 0 6px;font-size:18px}.answer-gate p,.empty-state p,.bootstrap-error p{max-width:460px;margin:0;color:var(--muted);line-height:1.65}.primary-button{margin-top:14px;border:1px solid rgba(15,118,110,.32);background:var(--accent);color:#fff;padding:0 14px}.primary-button:hover{background:#0b5f59}.text-button{border:1px solid var(--line);background:var(--surface);color:var(--accent);padding:0 12px}.text-button:hover,.text-button.selected{border-color:#0f766e42;background:var(--accent-soft)}.text-button:disabled:hover{border-color:var(--line);background:var(--surface)}.answer-content{margin-top:18px}.answer-toggle svg{transform:rotate(180deg)}.answer-section{margin-top:18px;border-left:3px solid rgba(15,118,110,.32);padding:2px 0 2px 16px}.answer-section h2,.related-block h2{margin:0 0 10px;font-size:18px}.markdown-body{color:#273444;font-size:15px;line-height:1.8;overflow-wrap:anywhere}.answer-section .markdown-body,.article-body{max-width:78ch}.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4{margin:1.5em 0 .7em;line-height:1.35}.markdown-body h1{font-size:24px}.markdown-body h2{font-size:20px}.markdown-body h3{font-size:17px}.markdown-body p,.markdown-body ul,.markdown-body ol,.markdown-body blockquote{margin:.7em 0}.markdown-body a{color:var(--blue);text-decoration-thickness:1px;text-underline-offset:3px}.markdown-body img{max-width:100%;height:auto;border-radius:8px}.markdown-body pre{overflow:auto;border-radius:8px;background:#111827;color:#f9fafb;padding:14px}.markdown-body code{border-radius:5px;background:#eef2f1;padding:2px 5px;color:#0f3f3b}.markdown-body pre code{background:transparent;padding:0;color:inherit}.markdown-body table{display:block;width:100%;overflow-x:auto;border-collapse:collapse}.markdown-body th,.markdown-body td{border:1px solid var(--line);padding:8px 10px}.markdown-body blockquote{border-left:4px solid var(--accent);margin-left:0;padding:5px 0 5px 13px;color:var(--muted)}.article-body{margin-top:18px}.related-block{margin-top:24px;border-top:1px solid var(--line);padding-top:16px}.source-path{margin-top:22px;border-top:1px solid var(--line);padding-top:14px;color:var(--muted);font-size:12px;overflow-wrap:anywhere}.detail-empty{min-height:100%;margin:0;border:0;border-radius:8px}.bootstrap-error{width:min(680px,calc(100% - 32px));margin:80px auto}.bootstrap-error code{border-radius:5px;background:#eef2f1;padding:2px 5px}.mobile-backdrop{display:none}@media(max-width:1180px){.workspace{grid-template-columns:230px minmax(300px,400px) minmax(0,1fr);padding-inline:14px}.detail-content h1{font-size:23px}}@media(max-width:940px){body{overflow:auto}.app-shell{height:auto;min-height:100vh;overflow-x:hidden}.topbar{grid-template-columns:1fr auto}.search-box,.mode-tabs,.stats-strip{grid-column:1 / -1}.stats-strip{justify-content:flex-start;grid-row:auto;overflow-x:auto}.mobile-only{display:inline-grid}.workspace{display:block;min-height:auto;padding:12px;overflow:visible}.filter-panel{position:fixed;top:0;left:0;z-index:40;width:340px;max-width:calc(100vw - 42px);height:100vh;max-height:none;overflow-x:hidden;transform:translate(-104%);transition:transform .16s ease}.filter-panel.open{transform:translate(0)}.list-panel,.detail-panel{height:auto;min-height:auto}.detail-panel{display:none;margin-top:0}.workspace.mobile-detail-open .filter-panel,.workspace.mobile-detail-open .list-panel{display:none}.workspace.mobile-detail-open .detail-panel{display:block}.mobile-detail-bar{position:sticky;top:0;z-index:4;display:flex}.mobile-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:30;display:block;border:0;background:#1118275c}}@media(max-width:620px){.topbar{padding:12px}.brand{min-width:0}.mode-tabs button{flex:1 0 auto}.item-row{display:block;min-height:0}.row-actions{display:flex;max-width:none;margin-top:12px;flex-wrap:nowrap;justify-content:flex-start}.detail-content{padding:16px}.detail-title-row{display:block}.detail-actions{margin-top:12px}.detail-content h1{font-size:21px}}