:root{--k-ink:#111713;--k-paper:#f3f0e7;--k-white:#fffdf8;--k-blue:#175cff;--k-red:#ff4b2b;--k-line:#c9c8c0;--k-muted:#696d68}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}.knowledge-site{background:var(--k-paper);min-height:100vh;color:var(--k-ink);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,sans-serif}.knowledge-header{border-bottom:1px solid var(--k-ink);z-index:20;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#f3f0e7f5;grid-template-columns:minmax(250px,1fr) auto minmax(250px,1fr);align-items:center;min-height:76px;padding:0 32px;display:grid;position:sticky;top:0}.knowledge-brand{width:fit-content;color:inherit;align-items:center;gap:11px;text-decoration:none;display:flex}.brand-logo{background:var(--k-ink);place-items:center;width:92px;height:42px;padding:7px 9px;display:grid}.brand-logo img{object-fit:contain;width:100%;height:100%}.knowledge-brand strong{letter-spacing:.08em;font-size:13px}.knowledge-header nav{align-items:center;gap:26px;display:flex}.knowledge-header nav a{color:var(--k-muted);border-bottom:3px solid #0000;padding:28px 0 24px;font-size:12px;font-weight:700;text-decoration:none}.knowledge-header nav a.active{border-color:var(--k-blue);color:var(--k-ink)}.knowledge-intro{border-bottom:1px solid var(--k-ink);background:linear-gradient(118deg,#0000 0 66%,#175cff14 66% 100%);grid-template-columns:minmax(0,1fr) minmax(390px,.72fr);align-items:center;gap:70px;min-height:460px;padding:42px 32px 38px;display:grid}.intro-copy h1{letter-spacing:-.065em;max-width:780px;margin:0;font-size:clamp(42px,5.4vw,78px);line-height:.98}.brand-stripes{grid-template-columns:1.15fr .75fr 1.35fr .85fr 1fr;gap:7px;width:214px;height:6px;margin-top:23px;display:grid}.brand-stripes i:first-child{background:#ee4335}.brand-stripes i:nth-child(2){background:#f0bd27}.brand-stripes i:nth-child(3){background:var(--k-blue)}.brand-stripes i:nth-child(4){background:#2a9a62}.brand-stripes i:nth-child(5){background:#7a4ab9}.intro-tools{gap:0;display:grid}.knowledge-portrait{pointer-events:none;background:0 0;border:0;height:300px;margin:0;position:relative;overflow:hidden}.knowledge-portrait img{filter:drop-shadow(0 16px 18px #11171321);width:auto;height:324px;display:block;position:absolute;top:0;right:17%}.knowledge-portrait:after{background:linear-gradient(to bottom, #f3f0e700, var(--k-paper));content:"";z-index:2;height:38px;position:absolute;bottom:0;left:0;right:0}.portrait-identity{border-left:3px solid var(--k-blue);min-width:190px;color:var(--k-ink);z-index:3;background:0 0;padding:7px 0 7px 12px;position:absolute;bottom:44px;left:0}.portrait-identity strong,.portrait-identity span,.portrait-identity small{display:block}.portrait-identity strong{letter-spacing:.04em;margin-bottom:7px;font-size:21px}.portrait-identity span{font-size:10px;font-weight:750;line-height:1.5}.portrait-identity small{color:var(--k-muted);margin-top:2px;font-size:9px;line-height:1.5}.knowledge-search>div{border:2px solid var(--k-ink);background:var(--k-white);height:64px;box-shadow:7px 7px 0 var(--k-ink);align-items:center;gap:12px;padding:0 16px;display:flex}.knowledge-search input{min-width:0;color:var(--k-ink);background:0 0;border:0;outline:0;flex:1;font-size:14px}.knowledge-search kbd{border:1px solid var(--k-line);color:var(--k-muted);background:#efede5;padding:5px 7px;font-size:9px}.topic-section{border-bottom:1px solid var(--k-ink);color:#fff;background:#0d1010;padding:38px 32px 44px;scroll-margin-top:76px}.topic-categories{flex-wrap:wrap;gap:8px;margin-bottom:22px;display:flex}.topic-categories button{color:#848b86;cursor:pointer;background:0 0;border:1px solid #2c322f;align-items:center;gap:8px;min-height:38px;padding:0 13px;font-size:10px;font-weight:750;display:inline-flex}.topic-categories button:hover,.topic-categories button.active{border-color:var(--topic-accent);color:#fff}.topic-categories i{background:var(--topic-accent);border-radius:50%;width:7px;height:7px}.topic-grid{grid-template-columns:repeat(6,minmax(0,1fr));gap:7px;display:grid}.topic-card{border:1px solid #262b29;border-top:3px solid var(--topic-accent);color:#fff;text-align:left;cursor:pointer;background:#121616;min-height:78px;padding:6px 9px}.topic-card:hover,.topic-card.active{border-color:var(--topic-accent);background:#181d1b}.topic-card>span{justify-content:space-between;align-items:center;gap:6px;display:flex}.topic-card>span b{color:#8a7c51;letter-spacing:.14em;font-size:7.5px}.topic-card>span em{color:#686f6b;font-size:7.5px;font-style:normal}.topic-card>strong{min-height:27px;margin-top:5px;font-size:18px;line-height:1.3;display:block}.topic-card>small{color:#686f6b;align-items:baseline;gap:4px;font-size:7.5px;display:flex}.topic-card>small b{color:var(--topic-accent);letter-spacing:-.04em;font-size:15px}.topic-card>small i{color:#686f6b;margin-left:auto;font-size:10px;font-style:normal}.tone-0{--topic-accent:#d7d0bc}.tone-1{--topic-accent:#d7b642}.tone-2{--topic-accent:#28c477}.tone-3{--topic-accent:#3e88ff}.tone-4{--topic-accent:#ff762b}.tone-5{--topic-accent:#a84cf0}.tone-6{--topic-accent:#f2bd00}.tone-7{--topic-accent:#20bcae}.tone-8{--topic-accent:#ff4e59}.knowledge-workspace{border-bottom:1px solid var(--k-ink);grid-template-columns:240px minmax(430px,1fr) minmax(450px,555px);align-items:start;min-height:760px;scroll-margin-top:76px;display:grid}.system-filter{border-right:1px solid var(--k-ink);background:#e9e6dc;align-self:start;max-height:calc(100vh - 76px);padding:28px 20px;position:sticky;top:76px;overflow-y:auto}.system-filter>p{color:var(--k-muted);letter-spacing:.16em;margin:0 10px 14px;font-size:9px;font-weight:850}.system-filter>button{color:#565b57;text-align:left;cursor:pointer;background:0 0;border:0;border-bottom:1px solid #d2d0c8;justify-content:space-between;align-items:center;gap:8px;width:100%;min-height:48px;padding:8px 10px 8px 24px;font-size:11px;display:flex;position:relative}.system-filter>button:before{background:var(--system-accent);content:"";width:4px;height:28px;position:absolute;top:50%;left:9px;transform:translateY(-50%)}.system-filter>button:nth-of-type(8n+1){--system-accent:#ff4f5e}.system-filter>button:nth-of-type(8n+2){--system-accent:#ffb000}.system-filter>button:nth-of-type(8n+3){--system-accent:#347dff}.system-filter>button:nth-of-type(8n+4){--system-accent:#25b878}.system-filter>button:nth-of-type(8n+5){--system-accent:#9b4de3}.system-filter>button:nth-of-type(8n+6){--system-accent:#ff713f}.system-filter>button:nth-of-type(8n+7){--system-accent:#48c7e8}.system-filter>button:nth-of-type(8n+8){--system-accent:#57c995}.system-filter>button:hover,.system-filter>button.active{background:var(--k-ink);color:#fff}.system-filter button span{align-items:center;gap:8px;display:flex}.system-filter button i{width:24px;color:var(--k-blue);font-size:9px;font-style:normal;font-weight:850}.system-filter button.active i{color:#7ca1ff}.system-filter button em{opacity:.65;font-size:9px;font-style:normal}.question-browser{min-width:0;padding:28px 26px 50px}.question-browser>header{border-bottom:2px solid var(--k-ink);justify-content:space-between;align-items:flex-start;min-height:71px;display:flex}.question-browser header p{color:var(--k-blue);letter-spacing:.12em;margin:0 0 6px;font-size:9px;font-weight:850}.question-browser h2{letter-spacing:-.04em;margin:0;font-size:24px}.question-browser header>span{color:var(--k-muted);font-size:10px}.question-list>button{border:0;border-bottom:1px solid var(--k-line);width:100%;min-height:89px;color:inherit;text-align:left;cursor:pointer;background:0 0;grid-template-columns:58px minmax(0,1fr) 28px;align-items:center;gap:12px;padding:14px 9px;display:grid}.question-list>button:hover,.question-list>button.selected{background:var(--k-white)}.question-list>button.selected{box-shadow:inset 4px 0 0 var(--k-blue)}.question-code{color:var(--k-blue);font-size:10px;font-weight:850}.question-copy small,.question-copy strong{display:block}.question-copy small{color:var(--k-muted);margin-bottom:7px;font-size:9px}.question-copy strong{font-size:13px;line-height:1.55}.question-arrow{color:var(--k-muted);justify-self:end;font-size:17px}.question-arrow.ready{color:#1c6a43;white-space:nowrap;background:#dcecdf;padding:4px 6px;font-size:8px;font-weight:850}.no-result{text-align:center;padding:68px 15px}.no-result p,.result-limit{color:var(--k-muted);font-size:10px}.result-limit{text-align:center;margin:18px 0 0}.question-detail{border-left:1px solid var(--k-ink);background:var(--k-white);min-height:calc(100vh - 76px);max-height:calc(100vh - 76px);color:var(--k-ink);align-self:start;padding:35px 24px 46px;scroll-margin-top:76px;position:sticky;top:76px;overflow-y:auto}.detail-status{border:1px solid var(--k-line);align-items:center;gap:7px;padding:6px 8px;font-size:9px;font-weight:750;display:inline-flex}.detail-status i{background:#2a9a62;border-radius:50%;width:7px;height:7px}.detail-route{color:var(--k-blue);letter-spacing:.12em;margin:28px 0 11px;font-size:10px;font-weight:850}.question-detail>h2{letter-spacing:-.03em;margin:0;font-size:clamp(20px,1.8vw,28px);line-height:1.4}.entry-content{gap:12px;margin-top:24px;display:grid}.entry-content section{background:#f7f8fb;border:1px solid #d7deec;border-left:4px solid #3e88ff;border-radius:5px;padding:16px 15px 18px}.entry-content h3{color:var(--k-blue);letter-spacing:.06em;margin:0 0 12px;font-size:10px;font-weight:850}.entry-content ul{gap:8px;margin:0;padding:0;list-style:none;display:grid}.entry-content li{color:#3f4641;padding-left:15px;font-size:12px;font-weight:560;line-height:1.8;position:relative}.entry-content li:before{color:#d7a72f;content:"•";font-size:17px;position:absolute;top:-1px;left:0}@media (max-width:1050px){.knowledge-header{grid-template-columns:1fr auto}.knowledge-header nav{display:none}.knowledge-intro{grid-template-columns:1fr;gap:38px}.topic-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (max-width:1180px){.knowledge-workspace{grid-template-columns:210px minmax(0,1fr)}.question-detail{border-top:1px solid var(--k-ink);border-left:0;grid-column:1/-1;min-height:auto;max-height:none;position:static;overflow:visible}}@media (max-width:720px){.knowledge-header{min-height:64px;padding:0 16px}.brand-logo{width:76px;height:36px;padding:6px 8px}.knowledge-intro{min-height:auto;padding:42px 18px 30px}.intro-copy h1{font-size:42px}.knowledge-portrait{height:260px}.knowledge-portrait img{height:280px;top:0;right:50%;transform:translate(50%)}.knowledge-search>div{height:58px;box-shadow:5px 5px 0 var(--k-ink)}.topic-section{padding:32px 16px 36px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.knowledge-workspace{display:block}.system-filter{border-right:0;border-bottom:1px solid var(--k-ink);white-space:nowrap;max-height:none;padding:14px 12px;position:static;overflow:auto hidden}.system-filter>p{display:none}.system-filter>button{border:1px solid var(--k-line);width:auto;min-height:38px;margin-right:5px;display:inline-flex}.system-filter button em{margin-left:8px}.question-browser{padding:24px 16px 38px}.question-list>button{grid-template-columns:45px minmax(0,1fr) 20px}.question-detail{padding:28px 18px 40px}.question-detail>h2{font-size:20px}.entry-content{gap:12px}.entry-content section{padding:16px}.entry-content h3{margin-bottom:12px;font-size:11px}.entry-content li{padding-left:15px;font-size:13px;line-height:1.8}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}