:root{--ink:#172b38;--muted:#60717e;--line:#dce3e7;--bg:#f5f7f9;--green:#17624d}
body{font-family:"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:#f5f7f9}
.sidebar{width:182px;background:#fff;border-right:1px solid var(--line);padding:28px 12px 18px}
.brand{margin:0 8px 32px;gap:8px}.brand-title{font-size:18px;letter-spacing:0}.brand img{width:27px;height:27px}
.nav-btn{font-size:14px;padding:12px 13px;color:#4b5d69}.nav-btn.active{color:#15543f;background:#e8f2ee;font-weight:600}.nav-divider{margin:20px 12px}
.workspace{margin-left:182px}.page{padding:28px 32px;max-width:1800px}.page-head{margin-bottom:22px;min-height:36px}.page-head h1{font-size:25px;font-weight:700}.page-head .btn,.btn{font-size:13px}.btn{border-color:#d5dfe4;color:#334c5b;padding:9px 13px;background:#fff}.btn.primary{color:#fff;background:#17624d;border-color:#17624d}.btn.ghost{background:transparent}.btn.small{font-size:12px;padding:7px 10px}.btn:disabled{opacity:.4}.btn:focus-visible,button:focus-visible{outline:2px solid #17624d;outline-offset:2px}
.subtle,.muted,.reader-meta,.field label{color:#60717e}.field label{font-size:13px;font-weight:600}.field input,.field select,.field textarea{font-size:14px;color:#172b38;border-color:#cbd6dd}.form-hint{font-size:12px;color:#60717e;margin:0 0 19px;line-height:1.8}.ico{flex-shrink:0}.pill{color:#355b50}.search{min-width:0}.search input{background:white;border-color:#cbd6dd;font-size:14px;padding:11px 12px 11px 39px}.search input::placeholder{color:#758591}.filter-select{border-color:#cbd6dd;font-size:13px;background:white;color:#334c5b;max-width:150px}.library-searchbar{display:flex;gap:10px;align-items:center}.library-searchbar .search{flex:1}.library-searchbar>.btn{white-space:nowrap}.list-controls{margin-top:8px;border-bottom:0;min-height:55px}.tabs .tab{font-size:14px;font-weight:500;color:#60717e}.tabs .tab.active{color:#15543f;font-weight:700}.filter-context{display:flex;align-items:center;gap:12px;min-width:0}.filter-context small{font-size:13px;color:#60717e;white-space:nowrap}.filter-chip{border:1px solid #b8d6c8;background:#eaf3ee;color:#15543f;border-radius:5px;display:flex;gap:8px;align-items:center;padding:5px 9px;font-size:12px}.filter-chip .ico{width:13px;height:13px}
.study-layout{display:grid;grid-template-columns:320px minmax(0,1fr);border:1px solid var(--line);border-radius:9px;background:#fff;height:calc(100dvh - 210px);min-height:440px;overflow:hidden}.study-list{overflow-y:auto;overscroll-behavior:contain;border-right:1px solid var(--line);scrollbar-width:thin}.study-item{display:flex;flex-direction:column;gap:8px;width:100%;text-align:left;border:0;border-bottom:1px solid #e5eaee;border-left:3px solid transparent;background:white;padding:16px 18px;cursor:pointer;color:#172b38}.study-item:hover{background:#f7faf9}.study-item.selected{border-left-color:#17624d;background:#eaf4ef}.study-item strong{font-size:14px;line-height:1.65;font-weight:650;overflow-wrap:anywhere}.study-excerpt{font-size:12px;color:#60717e;line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.study-tags{font-size:11px;color:#356e5c;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}.study-item-foot{display:flex;align-items:center;justify-content:space-between;gap:12px}.study-item time{font-size:11px;font-variant-numeric:tabular-nums;color:#60717e}.study-reader{min-width:0;display:flex;flex-direction:column;height:100%;overflow:hidden}.study-toolbar{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;border-bottom:1px solid var(--line);min-height:56px;background:#fcfdfd;gap:10px}.study-toolbar>span{font-size:12px;color:#60717e;font-variant-numeric:tabular-nums}.study-scroll{overflow:auto;overscroll-behavior:contain;flex:1;scrollbar-width:thin}.study-article{padding:24px 32px 60px;max-width:940px;margin:auto}.study-article-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.study-article-meta time{font-size:12px;color:#60717e}.study-article h1{font-size:25px;font-weight:700;line-height:1.5;overflow-wrap:anywhere;margin:0 0 14px}.study-article-tags{display:flex;flex-wrap:wrap;align-items:center;gap:7px;margin-bottom:28px}.study-article-tags button{font-size:12px;padding:4px 8px;border:0;border-radius:4px;background:#edf3f0;color:#285c49}.study-article-tags a{font-size:12px;color:#17624d;margin-left:5px}.study-article .markdown{font-size:15px;line-height:1.9;color:#243746;overflow-wrap:anywhere}.markdown h2{font-size:19px;border-bottom:1px solid #e4e9ec;padding-bottom:9px;margin-top:27px;color:#172b38}.markdown h3{font-size:17px;color:#172b38}.markdown blockquote{color:#445d6a;border-color:#659d88;background:#f1f7f4}.markdown pre{font-size:13px;background:#f6f8fa;line-height:1.7}.markdown table{display:block;overflow:auto;max-width:100%}.markdown img{max-width:100%}.katex-display{overflow-x:auto;overflow-y:hidden}.back-to-list{display:none}.reader-placeholder,.reader-loading,.list-empty{text-align:center;padding:70px 24px;font-size:14px;color:#60717e;line-height:2}.reader-placeholder .ico{width:32px;height:32px;color:#659d88;margin-bottom:15px}.reader-placeholder h2{font-size:20px;color:#243746}.reader-placeholder p{font-size:13px;margin:10px 0 20px}.student-progress{display:flex;align-items:center;gap:12px;margin-bottom:15px}.study-article .feedback-box small{display:block;margin-top:8px;color:#60717e}
.catalog-toolbar{display:flex;align-items:center;gap:20px;margin-bottom:22px}.catalog-toolbar .search{max-width:650px;flex:1}.catalog-toggle{display:flex;align-items:center;gap:7px;font-size:13px;color:#4a606e;white-space:nowrap}.catalog-toggle input{accent-color:#17624d;width:15px;height:15px}.catalog-layout{display:grid;grid-template-columns:195px minmax(0,1fr);border:1px solid var(--line);background:#fff;border-radius:9px;overflow:hidden;min-height:600px}.catalog-nav{padding:12px;background:#fafbfc;border-right:1px solid var(--line)}.catalog-category{width:100%;display:flex;justify-content:space-between;align-items:center;gap:8px;border:0;border-radius:5px;background:transparent;color:#3c5261;font-size:14px;padding:11px 12px;margin-bottom:2px;text-align:left}.catalog-category small{font-size:11px;color:#647c70;font-variant-numeric:tabular-nums}.catalog-category:hover{background:#f0f4f2}.catalog-category.active{background:#e6f1eb;color:#15543f;font-weight:700}.catalog-content{padding:28px 32px;min-width:0}.catalog-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-bottom:24px;border-bottom:1px solid var(--line)}.catalog-heading h2{font-size:22px;color:#172b38}.catalog-heading p{font-size:12px;color:#60717e;margin:8px 0 0}.catalog-section{padding:22px 0;border-bottom:1px solid #e5eaee}.catalog-section h3{font-size:13px;font-weight:700;color:#60717e;margin:0 0 12px}.catalog-topic-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px 16px}.catalog-topic{display:flex;align-items:center;border:1px solid transparent;border-radius:5px;min-width:0;position:relative}.catalog-topic:hover{background:#f2f7f4;border-color:#d6e7de}.catalog-topic>button:first-child{display:flex;align-items:center;justify-content:space-between;gap:8px;flex:1;min-width:0;font-size:14px;line-height:1.6;text-align:left;padding:9px 8px;border:0;background:none;color:#364c5b}.catalog-topic>button:first-child>span{overflow-wrap:anywhere}.catalog-topic small{font-size:11px;white-space:nowrap;color:#7b8c96}.catalog-topic.has-notes>button:first-child{color:#15543f;font-weight:600}.catalog-topic.has-notes small{color:#2f7058;font-weight:400}.topic-adjust{opacity:0;border:0;background:transparent;padding:6px 4px;color:#526c60}.topic-adjust .ico{width:13px;height:13px}.catalog-topic:hover .topic-adjust,.topic-adjust:focus-visible{opacity:1}.catalog-help{font-size:12px;color:#60717e;line-height:1.8;margin-top:22px}.catalog-sources{font-size:11px;color:#60717e;line-height:2;margin-top:16px;display:flex;flex-wrap:wrap;gap:0 7px}.catalog-sources a{color:#526f60;text-decoration:underline;text-underline-offset:3px}.catalog-sources span{margin-left:auto}.modal-header h2{font-size:16px;color:#243746;font-weight:600}.modal .fields-3{grid-template-columns:1.3fr .8fr 1.2fr;gap:16px}.editor-grid textarea{font-size:14px;line-height:1.85}.reader-main .markdown{color:#243746;line-height:1.9}.reader-meta{font-size:13px}.feedback-box p{font-size:14px}.settings-list p{color:#60717e;font-size:13px}.user-box small{color:#60717e}
@media(min-width:1051px){.study-layout{height:calc(100dvh - 235px)}}
@media(min-width:701px){.catalog-layout{height:calc(100dvh - 220px);min-height:440px}.catalog-nav,.catalog-content{overflow-y:auto;scrollbar-width:thin}.catalog-category{padding-top:9px;padding-bottom:9px}}
@media(min-width:1600px){.study-layout{grid-template-columns:370px minmax(0,1fr)}.study-article{padding-left:50px;padding-right:50px}}
@media(max-width:1250px){.page{padding:24px}.study-layout{grid-template-columns:280px minmax(0,1fr)}.study-article{padding:22px}.study-article h1{font-size:23px}.catalog-content{padding:25px}.catalog-topic-list{grid-template-columns:repeat(2,minmax(0,1fr))}.catalog-layout{grid-template-columns:180px minmax(0,1fr)}}
@media(max-width:1050px){.sidebar{width:170px}.workspace{margin-left:170px}.study-layout{display:block;height:calc(100dvh - 205px)}.study-list{height:100%;border:0}.study-reader{display:none}.study-layout.reading-open .study-reader{display:flex}.study-layout.reading-open .study-list{display:none}.back-to-list{display:inline-flex}.study-toolbar>span{margin-left:auto}.study-item{padding:16px 20px}.study-item strong{font-size:15px}.study-excerpt{font-size:13px}.study-tags,.study-item time{font-size:12px}.catalog-layout{grid-template-columns:165px minmax(0,1fr)}.catalog-content{padding:20px}.catalog-topic-list{grid-template-columns:1fr}.catalog-heading{gap:10px;flex-wrap:wrap}.catalog-heading h2{font-size:20px}.catalog-category{font-size:13px;padding:11px 8px}.topic-adjust{opacity:.65}.modal .fields-3{grid-template-columns:1fr}.library-searchbar{flex-wrap:wrap}.library-searchbar .search{flex-basis:100%}.library-page .study-layout{height:calc(100dvh - 255px)}}
@media(max-width:700px){.sidebar{width:208px}.workspace{margin-left:0}.topbar{color:#334c5b;border-bottom:1px solid var(--line)}.page{padding:20px 14px}.page-head{margin-bottom:18px}.page-head h1{font-size:23px}.page-head .btn{font-size:12px;padding:9px 10px}.library-searchbar{gap:8px}.library-searchbar .search input{font-size:13px}.list-controls{gap:8px;align-items:center;flex-wrap:wrap;padding-bottom:4px}.list-controls .tabs{gap:18px}.tabs .tab{font-size:13px}.filter-context{gap:8px}.filter-chip{max-width:180px;overflow-wrap:anywhere}.study-layout,.library-page .study-layout{height:calc(100dvh - 300px);min-height:380px}.study-item{padding:14px 16px}.study-article{padding:20px 18px 45px}.study-article h1{font-size:22px}.study-article .markdown{font-size:15px}.study-toolbar{padding:9px 10px;gap:6px}.study-toolbar .btn{font-size:11px;padding:7px}.study-toolbar .ico{width:13px;height:13px}.study-toolbar>span{font-size:11px}.study-article-meta{flex-wrap:wrap}.catalog-toolbar{gap:10px;flex-wrap:wrap;margin-bottom:16px}.catalog-toolbar .search{flex-basis:100%}.catalog-layout{display:block;min-height:0}.catalog-nav{display:flex;overflow:auto;gap:5px;border-right:0;border-bottom:1px solid var(--line);padding:10px;scrollbar-width:thin}.catalog-category{width:auto;white-space:nowrap;margin:0;padding:8px 10px;gap:8px}.catalog-content{padding:22px 18px}.catalog-topic-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:3px 6px}.catalog-topic>button:first-child{font-size:13px;padding:8px 4px}.catalog-topic small{font-size:10px}.topic-adjust{padding:5px 2px}.catalog-heading h2{font-size:21px}.catalog-sources span{margin-left:0;width:100%}.catalog-section{padding:20px 0}.catalog-sources{font-size:10px}.study-list .study-item.selected{border-left-color:transparent;background:#fff}.reader-only .reader-main{padding:8px 0 26px}.reader-controls{flex-wrap:wrap}.reader-main h1{font-size:23px}.filter-select{font-size:12px}.simple-login .login-form{padding:28px}}