@charset "UTF-8";
:root{--paper:#f7fbff;--ink:#172d50;--muted:#5b6e87;--line:#dce8f5;--blue:#2463df;--accent:#ef713d;--soft:#edf5ff;--mono:"SFMono-Regular",Consolas,"Liberation Mono",monospace;--sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}a,button,input{-webkit-tap-highlight-color:transparent}a:hover{color:var(--blue)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #2463df;outline-offset:4px}[hidden]{display:none!important}.site-shell{max-width:1280px;padding:0 44px;margin:auto}.header{height:100px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:inline-flex;align-items:center;font-size:28px;font-weight:750;letter-spacing:-1px}.brand-mark{background:var(--blue);color:#fff;font:17px var(--mono);border-radius:12px;padding:8px 9px;margin-right:10px;box-shadow:0 5px 13px #2463df20}.brand-dot,.accent{color:var(--accent)}.header nav{display:flex;gap:27px;align-items:center;font-size:14px;font-weight:550}.header nav>a[aria-current=page]{color:var(--blue)}.github-link{background:white;border:1px solid var(--line);border-radius:30px;padding:8px 17px}.github-link span{margin-left:5px}.language-switch{display:flex;gap:3px;padding:4px;background:white;border:1px solid var(--line);border-radius:30px;flex-shrink:0;line-height:1.5}.language-switch a{padding:5px 10px;font-size:12px;border-radius:20px}.language-switch a[aria-current=true]{background:var(--blue);color:#fff}.language-switch a:hover{background:var(--soft);color:var(--blue)}.language-switch a[aria-current=true]:hover{background:#194fb8;color:#fff}
.hero{position:relative;display:grid;grid-template-columns:1.25fr 1fr;align-items:center;gap:38px;padding:55px 48px 58px;border:1px solid #dbeeff;border-radius:30px;background:radial-gradient(ellipse at 100% 0,#fff0c5 0,transparent 47%),linear-gradient(115deg,#ebf6ff,#edf9ff 65%,#f1fcf6);overflow:hidden}.eyebrow{font:11px/1.6 var(--mono);font-weight:600;letter-spacing:1.35px;color:var(--muted)}.hero .eyebrow{display:inline-flex;align-items:center;background:#fff9;border:1px solid #fff;padding:7px 12px;border-radius:30px;color:#316396}.signal-dot{width:7px;height:7px;background:#20ad92;border-radius:50%;margin-right:8px}.hero h1{font-size:clamp(34px,3.6vw,48px);line-height:1.5;letter-spacing:-1.8px;margin:20px 0 18px;font-weight:750}.hero .accent{position:relative;white-space:nowrap}.hero-copy>p{font-size:15px;color:#516d8d;line-height:1.95;margin:0 0 28px}.hero-actions{display:flex;gap:22px;align-items:center;flex-wrap:wrap}.text-link{display:inline-flex;align-items:center;justify-content:center;gap:18px;background:var(--blue);color:white;padding:12px 22px;border-radius:30px;font-size:14px;font-weight:650;box-shadow:0 5px 16px #2463df24}.text-link:hover{color:#fff;background:#194fb8}.secondary-link{font-size:13px;color:#466382}.hero-visual{position:relative;padding:26px 6px 40px 14px;min-width:0}.orbit-mark{position:absolute;top:-4px;right:18px;color:#f4aa3b;font-size:51px;line-height:1;transform:rotate(12deg)}.field-cover{position:relative;background:#fff;border:1px solid #d8e8fa;border-radius:20px;box-shadow:0 18px 45px #548bc321;transform:rotate(-3deg);overflow:hidden;width:100%;padding:0 24px}.cover-top{display:flex;justify-content:space-between;align-items:center;padding:17px 0;border-bottom:1px solid #e8f0fa;font:11px var(--mono);color:#6b83a1}.window-dots{display:flex;gap:5px}.window-dots i{width:8px;height:8px;border-radius:50%;background:#f69278}.window-dots i:nth-child(2){background:#f6c54b}.window-dots i:nth-child(3){background:#50c9aa}.cover-diagram{padding:21px 0 18px}.diagram-label{font:9px var(--mono);letter-spacing:1px;color:#7995b4}.diagram-code{font:17px/1.9 var(--mono);letter-spacing:-.35px;padding-top:13px;color:#2163cc}.diagram-code span{font-size:12px;color:#647e9f}.cover-bottom{display:flex;justify-content:space-between;gap:8px;align-items:center;border-top:1px solid #e8f0fa;padding:15px 0;font:9px var(--mono);color:#748ba6}.terminal-status{color:#168773}.terminal-status i{display:inline-block;width:6px;height:6px;border-radius:50%;background:#21b897;margin-right:4px}.topic-tile{position:absolute;display:flex;align-items:center;gap:10px;background:#fff;border:1px solid #fff;border-radius:13px;padding:10px 15px;box-shadow:0 9px 25px #548bc321;font-size:12px;font-weight:650;z-index:1}.tile-icon{display:grid;place-items:center;width:27px;height:27px;border-radius:8px;font:16px var(--mono)}.topic-linux{top:4px;left:-10px;transform:rotate(-6deg);color:#9b4e14;background:#fff7e3}.topic-linux .tile-icon{background:#ffe3a9;color:#bd691c}.topic-kubernetes{right:-13px;bottom:22px;transform:rotate(5deg);color:#2860b8;background:#f0f6ff}.topic-kubernetes .tile-icon{background:#dceaff;color:#2860b8}.hero-rule{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:15px 35px;padding:23px 0;color:#647c98;font-size:12px}.hero-rule>span{display:flex;align-items:center;gap:8px}.hero-rule>span+span:before{content:"";display:inline-block;width:4px;height:4px;background:#afc6df;border-radius:50%}
.home-grid{padding:22px 0 66px;display:flex;flex-direction:column;gap:42px}.library{min-width:0}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}.section-heading h2{font-size:25px;font-weight:700;letter-spacing:-.5px;margin:0}.section-heading h2 .mono{font:10px var(--mono);font-weight:500;letter-spacing:1.3px;color:#7c94ae;margin-left:12px}.section-heading>span,.section-heading>a{font-size:12px;color:var(--muted);white-space:nowrap}#results-count{background:#eaf3ff;color:#3166a7;padding:5px 12px;border-radius:30px}.search{display:flex;gap:12px;align-items:center;background:white;border:1px solid var(--line);border-radius:15px;padding:12px 15px;margin:22px 0 18px;box-shadow:0 3px 10px #426c9810}.search:focus-within{border-color:#76a6f4;box-shadow:0 0 0 3px #2463df10}.search svg{width:20px;height:20px;flex-shrink:0;color:#5c8bc8}.search input{width:100%;min-width:0;background:none;border:0;outline:0;color:var(--ink);font-size:14px;padding:4px}.search input::placeholder{color:#7e91a9}.search-submit{background:var(--soft);color:var(--blue);border:0;border-radius:9px;padding:7px 15px;white-space:nowrap;font-size:12px}.filter-chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}.filter-chips button{border:1px solid var(--line);border-radius:30px;background:white;color:#526e8e;font-size:12px;padding:8px 14px;line-height:1.5}.filter-chips button span{margin-left:5px;font:10px var(--mono);opacity:.65}.filter-chips button:hover{border-color:#8eb2e5;background:#edf5ff}.filter-chips button[aria-pressed=true]{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 4px 10px #2463df20}
#note-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.note-card{--topic:#2863bc;--topic-bg:#edf4ff;background:white;border:1px solid var(--line);border-radius:20px;padding:25px;position:relative;min-width:0;box-shadow:0 4px 15px #284a7809;transition:transform .18s,box-shadow .18s,border-color .18s}.note-card:hover{transform:translateY(-4px);border-color:#abc9ed;box-shadow:0 12px 26px #28598913}.note-card[data-category=linux]{--topic:#a75410;--topic-bg:#fff2db}.note-card[data-category=network]{--topic:#13796b;--topic-bg:#e3f8f0}.note-card[data-category=observability]{--topic:#784dc1;--topic-bg:#f2eaff}.note-card[data-category=reliability]{--topic:#b14b77;--topic-bg:#ffeef4}.note-card>div{height:100%;display:flex;flex-direction:column}.note-number{position:absolute;right:23px;top:24px;font:11px var(--mono);color:#c1cfe0}.note-meta{display:flex;align-items:center;flex-wrap:wrap;gap:9px;color:#6d8199;font-size:11px}.note-card .note-meta{padding-right:15px;gap:8px}.category-label{display:inline-block;color:var(--topic,var(--blue));background:var(--topic-bg,var(--soft));padding:4px 9px;border-radius:7px;font-size:11px;font-weight:600}.note-card h3{font-size:19px;line-height:1.65;letter-spacing:-.35px;margin:17px 0 11px;font-weight:680}.note-card h3 a{display:flex;align-items:start;justify-content:space-between;gap:10px}.arrow{color:var(--topic);font-size:20px;flex-shrink:0;background:var(--topic-bg);border-radius:50%;width:27px;height:27px;text-align:center;line-height:27px;font-weight:400}.note-card p{font-size:13px;color:var(--muted);line-height:1.85;margin:0}.note-detail{display:flex;align-items:center;gap:8px 12px;flex-wrap:wrap;font-size:11px;color:#70849d}.note-detail>span:first-child,.note-detail time{font:10px var(--mono)}.note-card .note-detail{margin-top:auto;padding-top:23px}.tag{background:#f3f7fc;color:#677f9c;font-size:10px!important;padding:2px 7px;border-radius:5px}.note-card .tag{display:none}
.home-aside{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:20px}.home-aside>section,.editor-note{padding:26px;border-radius:20px;background:#eaf4ff;border:1px solid #d8e9fc}.home-aside .scope{background:#edfaf5;border-color:#daefe5}.editor-note{background:#fff6e7;border-color:#f7e5c6}.start-here h2,.scope h2{font-size:20px;font-weight:700;margin:12px 0 7px}.start-here p,.editor-note p{font-size:13px;color:var(--muted);line-height:1.85;margin:0 0 14px}.start-here ol{padding:0;margin:0;list-style:none}.start-here li{padding:10px 0;border-bottom:1px solid #ccdef1;font-size:12px}.start-here li:last-child{border:0;padding-bottom:0}.start-here li span{font:10px var(--mono);color:var(--blue);margin-right:8px}.scope>a{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:6px 0;font-size:12px}.scope>a span{font:10px var(--mono);color:#769d91;flex-shrink:0}.tiny-icon{font:26px var(--mono);color:#ec9640;display:inline-block;margin-bottom:12px}.editor-note p{margin-bottom:19px}.editor-note a{font-size:12px;font-weight:600;color:#965318}.footer{display:flex;align-items:center;flex-wrap:wrap;gap:20px;border-top:1px solid var(--line);padding:30px 0 38px;color:var(--muted);font-size:12px}.brand.small{font-size:23px;color:var(--ink)}.footer p{margin:0}.footer>div{display:flex;gap:18px;margin-left:auto}.copyright{font:10px var(--mono);color:#859bb4}
.page-intro{padding:35px 37px 39px;background:linear-gradient(110deg,#e6f3ff,#f2f8ff 70%,#fff3d9);border:1px solid #dceaf9;border-radius:25px;margin:12px 0 13px}.page-intro h1{font-size:43px;line-height:1.4;font-weight:750;letter-spacing:-1.4px;margin:12px 0}.page-intro p{margin:0;color:var(--muted);font-size:15px}.breadcrumb{display:flex;gap:10px;font-size:12px;color:#6e86a3;padding:20px 0 17px}.article-header{background:linear-gradient(105deg,#eaf4ff,#f2faff 75%,#fff7e8);border:1px solid #dceaf9;border-radius:25px;padding:35px 39px;margin-bottom:28px}.article-header h1{font-size:38px;line-height:1.5;letter-spacing:-1px;margin:15px 0;font-weight:720}.article-header p{font-size:16px;line-height:1.85;color:var(--muted);margin:0 0 21px;max-width:900px}.article-grid{display:grid;grid-template-columns:220px minmax(0,1fr);gap:27px}.toc{align-self:start;position:sticky;top:25px;padding:23px;background:#edf5ff;border:1px solid #dce8f7;border-radius:18px;font-size:12px}.toc nav{display:flex;flex-direction:column;gap:13px;line-height:1.8;margin-top:19px}.toc nav a{color:#55708f}.toc nav a:hover{color:var(--blue)}.toc-note{border-top:1px solid #d3e2f4;margin-top:23px;padding-top:18px;color:#6e86a3;font-size:10px;line-height:2}.prose{min-width:0;background:white;border:1px solid var(--line);border-radius:23px;padding:34px 38px;color:#344c69;font-size:16px;line-height:1.95}.prose>p:first-child{margin-top:0}.prose p{margin:16px 0 23px}.prose h2{color:var(--ink);font-size:23px;line-height:1.6;font-weight:680;margin:37px 0 17px;letter-spacing:-.3px}.prose li{margin-bottom:12px;padding-left:4px}.prose ul{padding-left:22px}.prose a{color:var(--blue);text-decoration:underline;text-underline-offset:4px;text-decoration-color:#b0cafa}.prose a:hover{color:#174ba9}.prose code{font:13px/1.7 var(--mono);background:#edf4ff;color:#285baa;padding:3px 5px;border-radius:5px;overflow-wrap:anywhere}.code-block{background:#f3f7fd;color:#294f80;border:1px solid #d9e6f7;border-radius:13px;overflow:hidden;margin:24px 0 28px}.code-top{display:flex;align-items:center;justify-content:space-between;padding:9px 16px;border-bottom:1px solid #d9e6f7;background:#eaf2ff;color:#5074a2;font:11px var(--mono)}.copy-code{border:1px solid #bed3f0;background:white;color:#285caa;border-radius:6px;font-size:11px;padding:3px 9px}.copy-code:hover{background:#e0ecff}.code-block pre{margin:0;padding:18px;overflow:auto;line-height:1.85}.code-block code{background:none;color:inherit;padding:0;font-size:13px;white-space:pre;overflow-wrap:normal}.article-end{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:15px;border-top:1px solid var(--line);margin-top:35px;padding-top:23px;font-size:12px}.article-end>span{font:10px var(--mono);color:var(--muted)}.related{padding:38px 0 60px}.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:23px}.about-prose{max-width:890px;margin:26px auto 60px}.about-prose h2:first-child{margin-top:0}.not-found{padding:55px 38px 65px;background:linear-gradient(120deg,#eaf5ff,#fff4df);border-radius:25px;margin:12px 0 55px;min-height:60vh}.not-found h1{font-size:44px;line-height:1.4}.not-found p{color:var(--muted);margin-bottom:28px}.empty{padding:45px 20px;text-align:center;background:white;border:1px dashed #aac7ee;border-radius:18px}.empty h3{font-size:20px}.empty p{font-size:14px;color:var(--muted)}.empty button{background:var(--blue);border:0;border-radius:30px;color:#fff;padding:11px 20px;font-size:14px}.notice{font-size:13px;color:var(--muted)}.skip{position:fixed;top:-100px;left:20px;z-index:10;background:var(--blue);color:#fff;border-radius:10px;padding:10px 20px}.skip:focus{top:12px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}#toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--blue);color:white;border-radius:13px;padding:12px 20px;font-size:13px;box-shadow:0 7px 25px #1c4c9130;max-width:calc(100% - 30px);opacity:0;pointer-events:none;transition:opacity .2s;z-index:9}#toast.visible{opacity:1}
html[lang=en] .hero h1{font-size:clamp(33px,3.2vw,44px);line-height:1.25;letter-spacing:-1.6px}html[lang=en] .hero-copy>p{line-height:1.85}html[lang=en] .hero-copy>p br{display:none}html[lang=en] .article-header h1{line-height:1.3}html[lang=en] .note-card h3{font-size:18px;line-height:1.55}html[lang=en] .note-card .note-meta{gap:7px}
@media(max-width:1100px){.site-shell{padding:0 30px}.hero{padding:42px 34px;gap:28px}.hero h1{font-size:40px}.header nav{gap:20px}#note-list{grid-template-columns:repeat(2,minmax(0,1fr))}.home-aside{grid-template-columns:1fr 1fr}.editor-note{grid-column:1/-1}.article-grid{grid-template-columns:190px minmax(0,1fr);gap:22px}.prose{padding:28px}.footer p{width:calc(100% - 110px)}.footer>div{margin-left:0}.copyright{margin-left:auto}}
@media(max-width:760px){.site-shell{padding:0 20px}.header{height:84px;gap:12px}.brand{font-size:25px}.brand-mark{font-size:14px;padding:7px;margin-right:7px}.header nav{gap:15px;font-size:12px}.github-link{display:none}.language-switch a{padding:4px 8px}.hero{grid-template-columns:1fr;padding:32px 27px 27px;border-radius:24px;gap:24px}.hero h1{font-size:38px;letter-spacing:-1.4px}.hero-copy>p{font-size:14px}.hero-copy>p br{display:none}.hero .eyebrow{font-size:10px}.hero-actions{gap:17px}.text-link{font-size:13px;padding:11px 18px}.secondary-link{font-size:12px}.hero-visual{max-width:400px;width:100%;justify-self:center;padding:18px 10px 29px}.field-cover{padding:0 21px}.diagram-code{font-size:16px}.topic-linux{left:-5px;top:-3px}.topic-kubernetes{right:-5px;bottom:10px}.hero-rule{gap:10px 20px;font-size:11px;padding:20px 0}.hero-rule>span+span:before{display:none}.home-grid{padding:15px 0 44px;gap:28px}#note-list{gap:16px}.note-card{padding:21px;border-radius:17px}.note-card h3{font-size:18px}.note-number{right:19px;top:21px}.note-meta{gap:7px}.note-detail{gap:7px 10px}.section-heading h2{font-size:23px}.section-heading h2 .mono{display:none}.home-aside{gap:16px}.home-aside>section,.editor-note{padding:23px}.footer{padding:24px 0 30px;gap:15px}.footer p{width:100%;font-size:11px}.footer>div{gap:18px}.copyright{width:100%;margin-left:0}.page-intro{padding:28px;margin-top:8px}.page-intro h1{font-size:34px}.page-intro p{font-size:14px}.article-header{padding:27px;margin-bottom:20px}.article-header h1{font-size:29px;letter-spacing:-.5px}.article-header p{font-size:15px}.article-grid{display:block}.toc{position:static;margin-bottom:20px;padding:23px}.toc nav{gap:10px}.toc-note{display:none}.prose{padding:25px;font-size:15px;line-height:1.95;border-radius:18px}.prose h2{font-size:21px;margin-top:30px}.code-block pre{padding:15px}.article-end{flex-direction:column;align-items:start;gap:10px}.related{padding:28px 0 45px}.related-grid{gap:16px}.about-prose{margin-bottom:40px}.not-found{padding:36px 27px;margin-bottom:38px}.not-found h1{font-size:34px}html[lang=en] .hero h1{font-size:37px}html[lang=en] .article-header h1{font-size:29px;overflow-wrap:anywhere}}
@media(max-width:560px){#note-list,.home-aside,.related-grid{grid-template-columns:1fr}.editor-note{grid-column:auto}.note-card .tag{display:inline-block}.note-card h3,html[lang=en] .note-card h3{font-size:19px}.hero-visual{max-width:340px}.hero-rule>span:first-child{width:100%;justify-content:center}.hero h1{font-size:34px}.article-header{padding:25px}.prose{padding:23px}.page-intro{padding:26px}}
@media(max-width:400px){.site-shell{padding:0 15px}.header{flex-wrap:wrap;height:auto;min-height:84px;padding:17px 0;gap:12px}.brand{font-size:23px}.brand-mark{display:none}.header nav{gap:11px}.language-switch a{padding:3px 7px;font-size:11px}.hero{padding:27px 22px}.hero h1{font-size:30px;letter-spacing:-1px}.hero .eyebrow{letter-spacing:.7px;font-size:9px}.hero-copy>p{font-size:13px}.hero-actions{gap:13px}.secondary-link{font-size:11px}.text-link{font-size:12px;padding:10px 15px}.hero-visual{padding:23px 3px 31px}.field-cover{padding:0 15px}.cover-top{font-size:9px}.diagram-label{font-size:8px;letter-spacing:.5px}.diagram-code{font-size:14px}.diagram-code span{font-size:10px}.cover-bottom{font-size:8px}.topic-tile{padding:8px 11px;font-size:10px;border-radius:11px;gap:7px}.tile-icon{width:24px;height:24px;font-size:14px}.orbit-mark{font-size:37px;top:-7px;right:5px}.note-card{padding:22px}.article-header{padding:22px}.article-header h1,html[lang=en] .article-header h1{font-size:26px}.prose{padding:20px}.prose h2{font-size:20px}html[lang=en] .hero h1{font-size:31px;letter-spacing:-1px}.article-end>span{overflow-wrap:anywhere}.not-found{padding:32px 22px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.note-card,#toast{transition:none}.note-card:hover{transform:none}}
@media print{body{background:white;color:black}.header,.footer,.toc,.copy-code,.related,.skip,#toast{display:none}.site-shell{padding:0}.article-grid{display:block}.article-header,.prose{border:0;background:white;padding:0}.article-header h1{font-size:28px}.prose{color:black}.code-block{break-inside:avoid;background:#f4f4f4;color:black}.prose a{color:black}.prose a[href^="https"]::after{content:" (" attr(href) ")";font-size:10px}}
@media screen and (min-width:761px){.toc{max-height:calc(100vh - 50px);overflow-y:auto}}
