:root{--bg:#f6f7f9;--surface:#fff;--ink:#202d2b;--muted:#7c8786;--line:#e7ecea;--green:#286450;--light:#eaf2e9;--lime:#cfef9e;--mono:Consolas,'SFMono-Regular',monospace;--sans:Inter,'Segoe UI','Microsoft YaHei',sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:14px;-webkit-font-smoothing:antialiased}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}a{color:inherit;text-decoration:none}button{cursor:pointer}button:disabled{cursor:wait;opacity:.6}:focus-visible{outline:3px solid #5ba78b;outline-offset:4px}button{border:0}button,a,input,select,textarea{transition:background .15s,color .15s,border-color .15s}svg{display:block}h1,h2,h3,p{margin-top:0}h1{font-size:30px;letter-spacing:-1px;margin-bottom:10px}h2{font-size:19px;letter-spacing:-.3px}h3{font-size:16px}p{line-height:1.9}.muted{color:var(--muted)}.skip{position:fixed;top:-100px;left:20px;z-index:100;background:white;padding:12px}.skip:focus{top:12px}
#sidebar{width:230px;position:fixed;inset:0 auto 0 0;background:#fff;border-right:1px solid var(--line);padding:30px 20px 18px;display:flex;flex-direction:column;z-index:30}.brand{display:flex;gap:12px;align-items:center;padding:0 9px 42px;font-size:23px;font-weight:750;letter-spacing:-.8px}.brand-icon{width:40px;height:42px;border-radius:11px;background:#1c443a;color:#d4efa8;display:flex;align-items:center;justify-content:center;font:700 23px var(--mono)}.brand-icon span{font-size:13px;letter-spacing:-3px;margin-left:0}.brand small{display:block;font-size:10px;color:#8b9691;letter-spacing:3px;font-weight:500;margin-top:3px}.nav-label{font-size:9px;font-weight:600;letter-spacing:1.7px;color:#9ba5a1;padding:12px 12px}.nav-label:not(:first-child){margin-top:22px}nav a{display:flex;align-items:center;gap:12px;padding:13px 13px;margin:4px 0;border-radius:8px;font-size:13px;color:#6a7672;font-weight:500}nav i{font-style:normal;font-size:20px;width:21px;text-align:center;line-height:20px}nav a:hover{background:#f4f7f4}nav a.active{background:#eaf2e9;color:#26583c;font-weight:650}.nav-count{font:10px var(--mono);background:#f0f3f0;padding:3px 6px;border-radius:5px;margin-left:auto}nav a.active .nav-count{background:#d9e8d4}.sidebar-bottom{margin-top:auto;padding-top:24px}.study-tip{padding:17px 15px;background:#f6f8f1;border:1px solid #eaf0df;border-radius:10px}.study-tip>span{font-size:10px;color:#82906d}.study-tip p{font-size:12px;line-height:1.9;margin:9px 0 16px;color:#435640}.study-tip a{font-size:11px;color:#426439;display:flex;justify-content:space-between}.local-status{display:flex;align-items:center;gap:7px;font-size:10px;color:#8a9590;padding:21px 2px 0}.local-status>span{width:6px;height:6px;border-radius:50%;background:#83ac78}.local-status small{margin-left:auto;font:9px var(--mono)}
.workspace{margin-left:230px}.topbar{height:77px;border-bottom:1px solid var(--line);background:#ffffffd9;display:flex;align-items:center;justify-content:space-between;padding:0 42px}.top-left{display:flex;align-items:center;gap:14px;color:#8c9693;font-size:12px}.top-left b{padding:0 15px;font-weight:400;color:#bec6c2}.top-left strong{color:#3c4a44;font-weight:500}.top-right{display:flex;align-items:center;gap:22px}.version{color:#77887d;font:10px var(--mono);border:1px solid #dfe8e0;padding:5px 8px;border-radius:4px}.avatar{width:32px;height:32px;border:3px solid white;background:#e8e5d9;border-radius:50%;display:grid;place-items:center;font-size:12px;color:#76725f;box-shadow:0 0 0 1px #eee}.icon-button{background:transparent;color:#66786c;font-size:19px;padding:5px}#menu{display:none}main{padding:38px 42px 30px;max-width:1500px;min-height:calc(100vh - 140px);margin:auto}footer{padding:18px 42px 24px;display:flex;justify-content:space-between;gap:16px;color:#a0aaa5;font-size:10px;max-width:1500px;margin:auto;border-top:1px solid var(--line)}.eyebrow{font:10px var(--mono);letter-spacing:2px;color:#7c8c82;margin-bottom:12px}.page-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:26px}.page-head p{font-size:12px;color:var(--muted);margin:0}.pill{font-size:10px;border:1px solid #dde5df;border-radius:30px;padding:7px 12px;color:#758478;background:#fff}.pill:before{content:' ';display:inline-block;width:5px;height:5px;border-radius:50%;background:#81a76a;margin-right:7px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;border:1px solid var(--line);padding:10px 16px;border-radius:6px;background:white;color:#516457;font-size:12px;line-height:1.5;font-weight:550}.btn:hover{background:#f0f5ee;border-color:#b7cdbd}.btn.primary{background:#285b47;color:white;border-color:#285b47}.btn.primary:hover{background:#1d4836}.btn.lime{background:var(--lime);color:#264430;border-color:transparent}.btn.subtle{background:transparent;border-color:transparent}.btn.small{padding:6px 10px;font-size:11px}.section-head{display:flex;align-items:center;justify-content:space-between;margin:32px 0 17px;gap:15px}.section-head h2{margin:0}.section-head a{font-size:11px;color:#7c8b81}.section-head h2 small{font:10px var(--mono);color:#9ca69f;letter-spacing:1px;margin-left:12px}
.hero{background:#183d34;border-radius:14px;min-height:267px;padding:33px 36px;color:#f9fff6;display:grid;grid-template-columns:1.15fr 1fr;position:relative;overflow:hidden;gap:20px}.hero::after{content:'';position:absolute;right:-60px;top:-100px;width:340px;height:340px;border-radius:50%;border:1px solid #ffffff0a;box-shadow:0 0 0 50px #ffffff03,0 0 0 100px #ffffff02;pointer-events:none}.hero-kicker{color:#b1d587;font:9px var(--mono);letter-spacing:2px;display:flex;gap:8px;align-items:center}.hero-kicker:before{content:'';width:13px;height:1px;background:#b1d587}.hero h2{font-size:31px;line-height:1.5;font-weight:600;letter-spacing:-1px;margin:16px 0 10px}.hero h2 em{font-style:normal;color:#c4e79c}.hero p{color:#afc1b8;font-size:11px;line-height:1.9;max-width:410px;margin:0 0 22px}.hero .btn{font-size:11px}.hero .ghost{color:#c0d0c7;border:0;background:transparent}.hero-art{align-self:center;z-index:1;padding:14px 20px;border:1px solid #ffffff17;border-radius:9px;background:#0e2c265c;transform:rotate(-2deg);position:relative}.code-dots{display:flex;gap:5px;margin-bottom:21px}.code-dots span{width:6px;height:6px;border-radius:50%;background:#47675a}.code-dots span:first-child{background:#b9cd92}.code-caption{position:absolute;right:17px;top:15px;font:8px var(--mono);letter-spacing:1px;color:#8fae9c}.hero-art pre{font:11px/1.9 var(--mono);color:#c0d2c4;margin:0}.hero-art .code-comment{color:#6e9586}.hero-art .code-key{color:#d4eda9}.code-out{display:flex;gap:5px;margin-top:18px;align-items:center}.code-out span{background:#2e5144;color:#d2e6bb;border-radius:4px;padding:7px 9px;font:11px var(--mono)}.code-out b{font-size:10px;font-weight:400;color:#8ca48e;margin-left:9px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:20px}.stat{padding:19px 20px;border:1px solid var(--line);border-radius:10px;background:#fff;display:flex;justify-content:space-between}.stat small{color:#8a9690;font-size:10px}.stat strong{display:block;font:500 27px var(--mono);letter-spacing:-1px;margin:10px 0 3px}.stat strong span{font:12px var(--sans);color:#a1aaa5;margin-left:6px}.stat>i{font-style:normal;width:31px;height:31px;border-radius:8px;background:#f3f6f0;color:#829a79;display:grid;place-items:center;font-size:18px}.stat p{margin:0;color:#9ba69e;font-size:9px}.home-grid{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(240px,1fr);gap:24px}.card{background:white;border:1px solid var(--line);border-radius:10px}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.topic{padding:21px 18px;display:flex;flex-direction:column;min-height:155px;position:relative}.topic:hover{border-color:#afc9b2;box-shadow:0 5px 18px #254a3010}.topic-icon{width:31px;height:31px;background:#edf3e7;color:#6b8554;border-radius:8px;display:grid;place-items:center;font:17px var(--mono);margin-bottom:16px}.topic:nth-child(2) .topic-icon{background:#eef0fa;color:#8894b4}.topic:nth-child(3) .topic-icon{background:#fbf1e5;color:#b69970}.topic h3{font-size:12px;margin-bottom:7px}.topic p{font-size:10px;color:#98a29c;margin:0;line-height:1.6}.topic .arrow{position:absolute;right:16px;top:24px;color:#b4beb7;font-size:16px}.mini-track{height:3px;border-radius:5px;background:#eef1ed;margin-top:18px;overflow:hidden}.mini-track>span{display:block;height:100%;background:#71956b;max-width:100%}.path-card{padding:20px}.path-intro{font-size:10px;color:#8a978d;line-height:1.8;margin-bottom:23px}.path-step{display:flex;gap:12px;position:relative;padding-bottom:23px}.path-step:not(:last-child):after{content:'';position:absolute;top:22px;bottom:3px;left:11px;width:1px;background:#e2e9df}.step-num{width:23px;height:23px;background:#f3f6f0;border:1px solid #e3eadf;border-radius:50%;display:grid;place-items:center;font:10px var(--mono);color:#87967b;flex-shrink:0;z-index:1}.path-step:first-of-type .step-num{background:#e0edce;color:#4e6d37}.path-step h3{font-size:12px;margin:3px 0 6px}.path-step p{font-size:10px;line-height:1.6;color:#98a196;margin:0}.path-card .btn{width:100%;margin-top:0}.table-wrap{overflow:auto;border-radius:10px;background:white;border:1px solid var(--line)}table{width:100%;border-collapse:collapse;text-align:left;white-space:nowrap}th{font-size:10px;color:#99a49c;font-weight:500;padding:14px 18px;border-bottom:1px solid var(--line);background:#fcfdfb}td{padding:16px 18px;border-bottom:1px solid #f0f3ef;font-size:11px}tr:last-child td{border-bottom:0}tbody tr:hover{background:#fafcf8}.problem-title{display:flex;align-items:center;gap:12px;font-size:12px;font-weight:550}.row-num{font:10px var(--mono);color:#a9b2ab;width:19px}.row-title:hover{color:var(--green)}.badge{font-size:9px;padding:4px 8px;border-radius:4px;display:inline-block;background:#edf4e9;color:#6d9162;white-space:nowrap}.badge.medium{background:#fcf3e3;color:#b18b44}.badge.hard{background:#faeeed;color:#bb7f7a}.tag{font-size:9px;color:#909d92;background:#f5f7f2;padding:3px 6px;border-radius:4px;display:inline-block;margin-right:4px}.status-dot{color:#a9b3ac;font-size:11px}.status-dot.done{color:#679457}.star-button{background:none;color:#b3bdb4;font-size:19px;padding:2px 8px}.star-button.on{color:#b28c3b}.knowledge-feature{padding:23px;margin-top:18px;background:#eef1e9;border-color:#e2e7da}.knowledge-feature .eyebrow{font-size:8px}.knowledge-feature h3{font-size:15px;line-height:1.7;margin-bottom:10px}.knowledge-feature p{font-size:10px;color:#8a9584}.knowledge-feature a{font-size:10px;color:#526a45;display:flex;justify-content:space-between}.learning-note{display:flex;gap:15px;padding:18px 20px;background:#f1f4eb;border:1px solid #e1e9d8;border-radius:8px;margin-top:24px;color:#788970;font-size:11px;line-height:1.9}.learning-note b{color:#526847;font-weight:550}
.filters{padding:20px;margin-bottom:20px}.filter-top{display:flex;gap:12px;margin-bottom:18px}.search{position:relative;flex:1}.search span{position:absolute;left:14px;top:10px;font-size:18px;color:#a0aca2}.search input{width:100%;padding:12px 14px 12px 42px;border-radius:7px;border:1px solid #e3e9e2;background:#fafcf9;font-size:12px;color:#425347}.filter-top select{border:1px solid var(--line);border-radius:6px;background:white;padding:8px 11px;color:#73816f;font-size:11px;max-width:145px}.chips{display:flex;flex-wrap:wrap;gap:7px}.chip{padding:7px 12px;border:1px solid #e7ece4;background:white;border-radius:5px;color:#889581;font-size:10px}.chip:hover{background:#f5f8f1}.chip.active{background:#315e46;border-color:#315e46;color:white}.results-line{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:#8b978e;margin:18px 0 14px}.empty{text-align:center;padding:56px 24px;background:#fff;border:1px dashed #dae4d6;border-radius:10px;color:#84927e}.empty h3{color:#586c50;font-size:16px}.empty p{font-size:12px}.empty .empty-symbol{font-size:35px;color:#b8c5ad;margin-bottom:14px}.knowledge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.article-card{padding:25px;display:flex;flex-direction:column;min-height:215px}.article-card:hover{border-color:#b7cdad}.article-card .article-number{font:10px var(--mono);color:#a2b594;letter-spacing:2px;margin-bottom:25px}.article-card h3{font-size:16px;line-height:1.6}.article-card p{font-size:11px;color:#98a38f;margin-bottom:22px}.article-card .article-meta{margin-top:auto;display:flex;justify-content:space-between;font-size:10px;color:#91a280}.route-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.route-card{padding:26px}.route-card>header{display:flex;gap:16px;align-items:center;margin-bottom:18px}.route-card>header>span{font:26px var(--mono);color:#b0c498}.route-card h2{margin:0 0 7px;font-size:17px}.route-card header p{margin:0;font-size:11px;color:#91a084}.route-link{display:flex;justify-content:space-between;padding:12px 0;border-top:1px solid #eff3eb;font-size:12px;color:#6d8061}.route-link span{font-size:11px;color:#a5b19b}.route-link:hover{color:#27643f}.progress-tools{display:flex;gap:9px;flex-wrap:wrap}.progress-summary{padding:24px;margin-bottom:22px}.progress-summary h2{margin-bottom:12px}.progress-summary p{font-size:12px;color:#8b9b80;margin-bottom:12px}.progress-tabs{display:flex;gap:9px;margin:22px 0 16px}.storage-notice{font-size:11px;color:#939e8b;background:#f0f3eb;padding:13px 16px;border-radius:6px;line-height:1.8}
.back-link{color:#8d9c83;font-size:11px;display:inline-flex;margin-bottom:25px}.detail-head{border-bottom:1px solid var(--line);padding-bottom:25px}.detail-head h1{font-size:29px;margin-top:10px}.detail-head .title-line{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.detail-meta{display:flex;gap:10px;align-items:center;margin-top:15px;flex-wrap:wrap}.detail-actions{display:flex;gap:7px;flex-wrap:wrap;margin-top:20px}.detail-actions .selected{background:#e3eddb;border-color:#c9dbbd;color:#52773b}.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:28px;margin-top:25px}.content-tabs{display:flex;border-bottom:1px solid #e0e7dc;gap:27px;margin-bottom:28px}.tab{border-bottom:2px solid transparent;background:none;padding:13px 0;color:#97a58c;font-size:12px}.tab.active{color:#426d30;border-color:#6d9054;font-weight:600}.prose{max-width:900px;min-width:0}.prose h2{font-size:18px;margin:30px 0 14px;display:flex;gap:12px;align-items:center}.prose h2:first-child{margin-top:0}.prose h2 .section-number{font:10px var(--mono);color:#9cb38a;letter-spacing:1px}.prose p,.prose li{font-size:13px;line-height:2.05;color:#61705a}.prose ol,.prose ul{padding-left:21px}.prose li{padding:4px 0 7px 5px}.example{background:#f0f3ed;border:1px solid #e3e9dd;border-radius:7px;padding:17px 20px;color:#65755b;font:12px/1.9 var(--mono);white-space:pre-wrap;overflow-wrap:anywhere}.callout{border-left:3px solid #9fbd82;background:#eef3e8;padding:16px 19px;border-radius:0 7px 7px 0;margin:17px 0;font-size:12px;line-height:1.9;color:#6a7e5b}.complexity{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-top:17px}.complexity>div{padding:16px;background:white;border:1px solid var(--line);border-radius:7px}.complexity small{display:block;color:#97a58d;font-size:10px;margin-bottom:8px}.complexity strong{font-size:12px;font-weight:500;line-height:1.8;display:block}.detail-aside{padding-top:4px}.aside-box{padding:19px;border:1px solid var(--line);border-radius:9px;background:white;margin-bottom:14px}.aside-box h3{font-size:11px;margin:0 0 15px;color:#7f8e74}.aside-box a{display:block;font-size:12px;line-height:1.8;padding:9px 0;color:#647959;border-top:1px solid #f0f3ec}.aside-box small{font-size:10px;color:#9da991;line-height:1.9}.aside-box label{display:block;font-size:11px;color:#7f906f;margin-bottom:11px}.aside-box textarea{width:100%;border:1px solid #e6ecdf;border-radius:5px;resize:vertical;min-height:140px;background:#fcfdf9;padding:10px;font-size:11px;line-height:1.9;color:#627555}.aside-box .save-caption{font-size:9px;color:#9daa92;margin-top:8px}.code-block{border-radius:9px;background:#1e302b;border:1px solid #2e433a;color:#d0dece;overflow:hidden;min-width:0;margin:18px 0 24px}.code-bar{display:flex;justify-content:space-between;align-items:center;background:#243a31;padding:11px 16px;color:#98b19b;font:10px var(--mono)}.code-bar .btn{background:#31493c;color:#c6d6bd;border-color:#3b5544;font-size:10px;padding:4px 10px}.code-block pre{font:12px/1.95 var(--mono);overflow:auto;padding:20px;margin:0;tab-size:4;max-width:100%}.explain-list{counter-reset:explain;list-style:none;padding-left:0!important}.explain-list li{padding:14px 0 14px 40px;position:relative;border-bottom:1px solid #e7ece1}.explain-list li:before{counter-increment:explain;content:counter(explain,decimal-leading-zero);position:absolute;left:0;top:18px;font:11px var(--mono);color:#8ea679}.editor-toolbar{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0 12px}.editor{width:100%;min-height:440px;background:#1e302b;color:#d6e2d1;border:1px solid #365141;border-radius:8px;font:12px/1.95 var(--mono);padding:20px;resize:vertical;tab-size:4}.editor:focus{outline:2px solid #87ac6b}.editor-status{display:flex;justify-content:space-between;gap:12px;line-height:1.8;font-size:10px;color:#91a17f;margin:12px 0 18px}.self-check{display:flex;gap:14px;align-items:center;padding:17px;background:#edf2e6;border-radius:8px;margin:22px 0}.self-check p{font-size:11px;margin:0;flex:1}.self-check .btn{flex-shrink:0}.article-detail{max-width:860px;margin:auto}.article-detail .detail-head{margin-bottom:30px}.article-detail .detail-head p{color:#8d9d7f;font-size:13px}.article-detail .related{display:flex;gap:8px;flex-wrap:wrap;margin-top:17px}.article-detail .related a{border:1px solid #dce6d3;background:white;padding:8px 12px;border-radius:6px;font-size:11px;color:#748a60}#toast{position:fixed;bottom:28px;left:calc(50% + 100px);transform:translate(-50%,20px);padding:13px 23px;background:#244b38;color:white;box-shadow:0 8px 35px #1933262b;border-radius:7px;max-width:min(90vw,600px);font-size:12px;opacity:0;pointer-events:none;transition:all .2s;z-index:100;line-height:1.8}#toast.show{opacity:1;transform:translate(-50%,0)}.import-preview{padding:18px;background:#fff7e3;border:1px solid #ead9a3;border-radius:8px;margin-bottom:20px;color:#8c763a;font-size:12px}.import-preview p{margin-bottom:10px}.import-preview .btn{margin-right:8px}.article-search{margin-bottom:23px}.sort-table{margin-top:15px}.small-label{font-size:10px;color:#9aa58f}
@media(min-width:1600px){main{padding-top:46px}.hero{min-height:300px}.hero h2{font-size:37px}.hero-art{max-width:430px;justify-self:end;width:100%}}
@media(max-width:1200px){#sidebar{width:205px;padding:26px 15px 16px}.workspace{margin-left:205px}.topbar{padding:0 28px}main{padding:30px 28px}.hero{padding:28px}.hero h2{font-size:27px}.hero-art{padding:14px}.hero-art pre{font-size:10px}.home-grid{gap:17px;grid-template-columns:minmax(0,1.6fr) minmax(230px,1fr)}.topic-grid{gap:8px}.topic{padding:17px 13px}.detail-layout{grid-template-columns:minmax(0,1fr) 205px;gap:20px}.stats{gap:10px}.stat{padding:16px}.knowledge-grid{grid-template-columns:repeat(2,1fr)}footer{padding-left:28px;padding-right:28px}}
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