:root{--ink:#172a2d;--muted:#68787b;--line:#dce3e5;--accent:#12766d;--accent-bg:#e8f3f0;--red:#a3404b;--blue:#356e9c;--paper:#fff;--wash:#f4f6f7;--side:202px;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:var(--ink);background:var(--wash);font-size:14px;letter-spacing:0}
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button{border:0;background:none;color:var(--accent);padding:0;display:flex;gap:6px;align-items:center}.detail-title{max-width:900px;font-size:21px;line-height:1.6;overflow-wrap:anywhere}.detail-meta{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:12px;font-size:11px;color:var(--muted)}.detail-grid{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:35px}.detail-grid article{min-width:0}.question-body,.answer-body{font-size:15px;line-height:2;overflow-wrap:anywhere;max-width:900px}.question-body p,.answer-body p{margin-bottom:13px;white-space:pre-wrap}.question-body h2,.answer-body h2{font-size:17px;margin:20px 0 12px}.question-body h3,.answer-body h3{font-size:15px;margin:18px 0 10px}.question-body li,.answer-body li{margin-bottom:9px;white-space:pre-wrap}.question-body table,.answer-body table{font-size:12px}.question-body code,.answer-body code{white-space:pre-wrap}.figure{margin:22px 0;background:#fff;border:1px solid var(--line);padding:12px;max-width:800px}.figure img{max-width:100%;max-height:520px;object-fit:contain;display:block;margin:auto}.figure figcaption{font-size:10px;color:var(--muted);margin-top:8px}.side-section{border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:20px}.side-section h3{font-size:12px;margin-bottom:12px}.side-section a{display:block;font-size:12px;line-height:1.7;margin-bottom:9px;overflow-wrap:anywhere}.side-section small{display:block;line-height:1.8;overflow-wrap:anywhere}.state-note{background:#edf3f3;padding:12px 15px;border-left:3px solid #6b9f99;font-size:12px;color:#4b6265;line-height:1.8;margin:18px 0}.state-note.warning{background:#faeff0;border-color:var(--red);color:#8b414a}.empty{padding:42px 20px;text-align:center;color:var(--muted);font-size:13px;border-block:1px solid var(--line)}.media-row{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:20px 0;border-bottom:1px solid var(--line)}.media-row 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button.active{background:var(--accent-bg);border-color:var(--accent)}.draft-row{display:flex;align-items:center;gap:12px;padding:14px 0;border-bottom:1px solid var(--line)}.draft-row>div{min-width:0;flex:1}.draft-row small{display:block;margin-top:6px}.draft-row strong{font-size:13px;line-height:1.6;overflow-wrap:anywhere}.draft-title{width:min(100%,500px);padding:12px;border:1px solid #c6d6d4;border-radius:4px;background:#fff;margin:18px 0}.preview-question{padding:25px 0;border-bottom:1px solid var(--line)}.preview-question h3{margin-bottom:14px}.preview-question .question-body{font-size:14px}.archive-list{margin-top:18px}.archive-row{display:grid;grid-template-columns:100px minmax(0,1fr) auto;gap:15px;align-items:start;padding:18px 0;border-bottom:1px solid var(--line);font-size:12px;line-height:1.8}.archive-row strong{display:block}.archive-row small{display:block}.katex-display{overflow-x:auto;overflow-y:hidden;padding:7px 0;max-width:100%}.katex{font-size:1.1em}footer{border-top:1px solid var(--line);padding:17px 34px;display:flex;gap:15px;font-size:10px;color:#899497}.footer-status{margin-left:auto}#toast{position:fixed;bottom:25px;left:calc(var(--side) + 30px);background:#203c3d;color:#fff;padding:13px 18px;border-radius:5px;z-index:30;font-size:13px;max-width:calc(100vw - var(--side) - 60px)}.loading{padding:50px;text-align:center;color:var(--muted)}
.detail-tabs a{padding:11px 2px;border-bottom:3px solid transparent;color:var(--muted)}.detail-tabs a.active{border-bottom-color:var(--accent);color:var(--accent);font-weight:700}.detail-tabs a:hover{text-decoration:none}.question-reference{border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:25px}.question-reference summary,.source-original summary{font-weight:600;font-size:14px;cursor:pointer;padding:10px 0}.source-original{margin:15px 0;color:var(--muted)}.teaching-guide{border-block:1px solid var(--line);padding:22px 0;margin-top:23px}.teaching-guide>div{margin-top:18px;line-height:1.9}.teaching-guide p{margin:7px 0;font-size:14px}.teaching-guide small{display:block;margin-top:15px}.alternate-media{font-size:12px;margin-top:10px}.alternate-media summary{cursor:pointer;color:var(--accent)}.alternate-media a{display:block;margin-top:7px}
@media(max-width:1150px){:root{--side:180px}.sidebar{padding-inline:10px}.brand{font-size:16px}.topbar{padding-inline:23px}.top-tools #snapshot-time{display:none}main{padding-inline:24px}.detail-grid{grid-template-columns:minmax(0,1fr) 210px;gap:23px}.home-grid{grid-template-columns:minmax(0,1.4fr) minmax(230px,1fr);gap:22px}.stat{padding-inline:15px}.table-topic{max-width:150px}.table-status{display:none}}
@media(max-width:800px){:root{--side:68px}.sidebar{padding:22px 9px}.brand{justify-content:center;padding:0}.brand strong,.family,.sidebar nav a:not(.active) .count,.sidebar-bottom,.sidebar nav a{font-size:0}.sidebar nav a{justify-content:center;padding:12px 0}.sidebar nav a svg{width:22px;height:22px}.sidebar nav{margin-top:24px}.sidebar nav a.active{font-size:0}.parent-nav{padding-top:5px}.home-grid,.detail-grid{grid-template-columns:1fr}.reading-pane{border-left:0;border-top:1px solid var(--line);padding:20px 0 0}.detail-aside{border-top:1px solid var(--line);padding-top:20px}.topbar{padding-inline:18px}.student-toggle button{padding:7px 10px}.top-tools a span{display:none}main{padding:24px 18px}.stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 0}.stat:nth-child(2){border:0}.filters{flex-wrap:wrap}.filters .search{flex-basis:100%}.topic-list{grid-template-columns:1fr}.subject-tabs{gap:19px}.archive-row{grid-template-columns:78px minmax(0,1fr)}.archive-row>.badge{grid-column:2}.button{padding:9px 11px}.table-topic{display:none}h1{font-size:22px}footer{padding-inline:18px}}
.method-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,340px),1fr));gap:16px;margin-top:16px}
.method-card{min-width:0;background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:20px;overflow-wrap:anywhere}
.method-card h3{margin:8px 0}.method-card p{margin:10px 0;line-height:1.8}.method-card .actions{margin-top:16px;flex-wrap:wrap}
/* Shared paper index and local refresh remain in the existing page flow. */
.paper-row{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:20px 0;border-bottom:1px solid #d9e3e1}
.paper-row strong,.paper-row small{display:block}
.paper-row small{margin:6px 0;color:#586d72;overflow-wrap:anywhere}
.paper-row>div{min-width:0}
#refresh-status{font-size:12px;max-width:160px;overflow-wrap:anywhere;color:#586d72}
.top-tools{flex-wrap:wrap}
.topbar{position:sticky;top:0;z-index:10;min-height:76px;height:auto;padding-block:12px}
#pending-notice{color:#a63648;white-space:nowrap;font-size:12px}
.pending-count{display:inline-flex;align-items:center;justify-content:center;min-width:30px;padding:2px 6px;border-radius:4px;border:1px solid #e7bbc2;background:#fff2f4;color:#a63648;font-size:12px;font-weight:700;vertical-align:middle;margin-left:5px}
#pending-entry label{display:flex;align-items:center;gap:5px;flex-wrap:wrap}
@media(max-width:800px){.top-tools #pending-notice .pending-count{display:inline-flex}}
.stat{position:relative}
.library-toolbar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:12px 0;border-block:1px solid var(--line);font-size:12px}
.library-options{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin:0 0 16px;font-size:12px;color:var(--muted)}
.library-options label{display:flex;align-items:center;gap:8px;color:var(--ink)}
.library-options small{line-height:1.6}
.library-view{display:inline-flex;border:1px solid var(--line);border-radius:4px;overflow:hidden;background:#fff}
.library-view button{min-width:58px;min-height:36px;padding:7px 11px;border:0;background:#fff;color:var(--muted)}
.library-view button+button{border-left:1px solid var(--line)}
.library-view button[aria-pressed="true"]{background:var(--accent-bg);color:var(--accent);font-weight:700}
.table-date{min-width:120px;font-size:11px;color:var(--muted)}
.library-toolbar label{display:flex;align-items:center;gap:6px;white-space:nowrap}
.library-toolbar>.actions{margin-left:auto;flex-wrap:wrap}
#batch-result{font-size:12px;color:var(--accent);line-height:1.8;overflow-wrap:anywhere}
#batch-result:not(:empty){padding:12px 0}
.study-review-cards.is-preview-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.study-review-cards.is-library-grid{grid-template-columns:minmax(0,1fr);gap:16px}
.is-library-grid .study-review-card{padding:22px 24px;border:1px solid var(--line);border-radius:6px;background:#fff}
.is-library-grid .study-review-card:first-child{padding-top:22px}
.is-library-grid .study-review-head{align-items:center}
.is-library-grid .study-review-editor{margin-top:18px;padding-top:15px}
.is-library-grid .study-review-question{margin-top:18px}
.is-preview-grid .study-review-card{padding:18px;background:#fff;border:1px solid var(--line);border-radius:6px;align-self:start}
.is-preview-grid .study-review-head{display:block}
.is-preview-grid .study-review-heading h2{font-size:16px}
.is-preview-grid .study-review-tools{margin-top:10px}
.is-preview-grid .study-review-question{margin-top:12px}
.is-preview-grid .study-review-content{font-size:14px;line-height:1.9}
.is-preview-grid .study-review-figure{width:100%;padding:0;border:0;margin:14px 0}
.is-preview-grid .study-review-figure img{max-height:340px}
.is-preview-grid .study-review-figure figcaption{margin-top:5px}
.is-preview-grid .study-review-choices{gap:6px}
.is-preview-grid .study-review-choice{flex:1 1 100px;justify-content:center}
.is-preview-grid .study-review-editor{margin-top:10px;padding-top:12px}
.is-preview-grid .study-review-editor h3{font-size:12px;margin-bottom:8px;color:var(--muted)}
.study-review-more-figures{margin-top:10px;font-size:12px}
.study-review-more-figures summary{cursor:pointer;color:var(--accent);padding:7px 0}
.study-review-notes summary{cursor:pointer;color:var(--muted);font-size:12px;margin:8px 0}
.is-preview-grid .study-review-footer{gap:10px;margin-top:10px}
.is-preview-grid .study-review-save{font-size:12px;padding:6px 10px;min-height:32px}
.compose-workspace{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:24px;align-items:start}
.compose-candidates{min-width:0}
.compose-basket{position:sticky;top:98px;max-height:calc(100vh - 115px);overflow:auto;border-left:1px solid var(--line);padding-left:20px;min-width:0}
.compose-basket .actions{flex-wrap:wrap}
.compose-basket .draft-row strong{font-size:12px}
.compose-basket .draft-row small{overflow-wrap:anywhere;font-size:10px}
.compose-basket .preview-question h3{font-size:13px}
.compose-basket .figure{padding:0;border:0}
.compose-status{font-size:12px;color:var(--muted);line-height:1.7;margin-top:15px}
.paper-action-state{display:block;font-size:12px;line-height:1.7;color:var(--muted);margin-top:9px;overflow-wrap:anywhere}
.paper-row .actions{flex-wrap:wrap;justify-content:flex-end}
.paper-confirm{border:1px solid var(--line);border-radius:6px;padding:24px;max-width:560px;width:calc(100% - 40px);color:var(--ink)}
.paper-confirm::backdrop{background:#172a2d66}
.paper-confirm p{margin:15px 0;line-height:1.9}
.paper-confirm .actions{justify-content:flex-end;flex-wrap:wrap}
@media(max-width:1350px){.compose-candidates .study-review-cards.is-preview-grid{grid-template-columns:1fr}.compose-workspace{grid-template-columns:minmax(0,1fr) 290px}}
@media(max-width:1000px){.study-review-cards.is-preview-grid{grid-template-columns:1fr}.compose-workspace{grid-template-columns:1fr}.compose-basket{position:static;max-height:none;border-left:0;border-top:1px solid var(--line);padding:20px 0}.library-toolbar>.actions{margin-left:0}.study-review-tools{flex-wrap:wrap}}
.stat-link,.stat-label{color:inherit;text-decoration:none}
.stat-link:focus-visible,.stat-label:focus-visible{outline:2px solid #14736b;outline-offset:4px}
.stat-link:hover label,.stat-label:hover label{color:#14736b;text-decoration:underline}
.stat label svg{width:14px;height:14px;vertical-align:middle}
.stat-hint{display:block;margin-top:8px;color:#a63648;font-size:12px}
.update-count{display:inline-flex;align-items:center;justify-content:center;min-width:32px;padding:3px 7px;margin-left:10px;vertical-align:middle;border:1px solid #a5c8e1;border-radius:4px;background:#edf6fc;color:#24618d;font-size:16px;font-weight:700;text-decoration:none}
.update-count:hover{background:#d9edf9}
.review-row{display:flex;align-items:center;justify-content:space-between;gap:22px;padding:22px 0;border-bottom:1px solid #d9e3e1}
.review-row>div{min-width:0}
.review-row strong,.review-row small{display:block;overflow-wrap:anywhere}
.review-row small{margin:7px 0;color:#586d72}
.review-row .actions{flex-wrap:wrap;flex-shrink:0}
.review-row .badge{margin:3px 0}
@media(max-width:1100px){.review-row{align-items:flex-start;flex-direction:column;gap:12px}.review-row .actions{flex-shrink:1}.stat-hint{max-width:100%}}
@media(max-width:1000px){.paper-row{align-items:flex-start;flex-direction:column}.paper-row .actions{flex-wrap:wrap}.topbar{flex-wrap:wrap;gap:12px}}
.legacy-composer{display:block;width:100%;height:calc(100vh - 205px);min-height:760px;border:1px solid #d6e0de;background:#f7f9f8;border-radius:4px}.library-bottom-pager{margin:20px 0 8px;scroll-margin-top:95px}