@font-face{font-family:Bricolage Grotesque Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(./bricolage-grotesque-vietnamese-opsz-normal-D9N6E8K1.woff2) format("woff2-variations");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Bricolage Grotesque Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(./bricolage-grotesque-latin-ext-opsz-normal-IcJDqblK.woff2) format("woff2-variations");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Bricolage Grotesque Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(./bricolage-grotesque-latin-opsz-normal-Cre6nC2_.woff2) format("woff2-variations");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:400;src:url(./jetbrains-mono-latin-400-normal-V6pRDFza.woff2) format("woff2"),url(./jetbrains-mono-latin-400-normal-6-qcROiO.woff) format("woff")}@font-face{font-family:Caveat;font-style:normal;font-display:swap;font-weight:700;src:url(./caveat-latin-700-normal-D8_1Nw6V.woff2) format("woff2"),url(./caveat-latin-700-normal-cPyBTTZN.woff) format("woff")}:root{--bg: #ffffff;--dot: rgba(47, 91, 255, .16);--ink: #14161b;--muted: #5b6170;--line: rgba(20, 22, 27, .1);--surface: #ffffff;--header: rgba(255, 255, 255, .78);--blue: #2f5bff;--blue-ink: #ffffff;--red: #f03e3e;--green: #0ca678;--yellow: #fcc419;--rim-hi: #f6f8fb;--rim-lo: #d9dee7;--tray: #e2e6ed;--board-shadow: rgba(47, 91, 255, .28);--code-bg: #16181f;--code-fg: #e7e9f0;--note-ink: #23262d;--note-yellow: #fff1a1;--note-pink: #ffd9e4;--note-blue: #d6e6ff;--note-green: #d3f4e0;--font: "Bricolage Grotesque Variable", "Bricolage Grotesque", ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;--hand: "Caveat", "Kaiti SC", "STKaiti", "KaiTi", cursive;--mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;color-scheme:light}:root[data-theme=dark]{--bg: #0f1116;--dot: rgba(125, 151, 255, .14);--ink: #eceef3;--muted: #9aa1b0;--line: rgba(236, 238, 243, .1);--surface: #171a21;--header: rgba(15, 17, 22, .78);--blue: #7d97ff;--blue-ink: #0f1116;--red: #ff6b6b;--green: #38d9a9;--yellow: #ffd43b;--rim-hi: #353a45;--rim-lo: #1d2028;--tray: #262a33;--board-shadow: rgba(0, 0, 0, .6);--code-bg: #0a0b0f;color-scheme:dark}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit}:focus-visible{outline:2px solid var(--blue);outline-offset:2px}.skip{position:absolute;left:-999px;top:8px;padding:8px 12px;background:var(--ink);color:var(--bg);border-radius:6px;z-index:100}.skip:focus{left:8px}.page{position:relative;isolation:isolate;overflow-x:clip}.page:before{content:"";position:absolute;inset:0 0 auto;height:1500px;background-image:radial-gradient(var(--dot) 1.3px,transparent 1.4px);background-size:24px 24px;mask-image:linear-gradient(#000 40%,transparent);-webkit-mask-image:linear-gradient(#000 40%,transparent);pointer-events:none;z-index:-1}.wrap{max-width:1200px;margin-inline:auto;padding-inline:24px}.site-header{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--header);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;gap:32px;height:64px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:-.01em;text-decoration:none}.site-header nav{display:flex;gap:24px;font-size:15px}.site-header nav a{color:var(--muted);text-decoration:none}.site-header nav a:hover{color:var(--ink)}.header-actions{margin-left:auto;display:flex;align-items:center;gap:4px}.text-btn{border:0;background:none;padding:6px 10px;border-radius:8px;color:var(--muted);font:inherit;font-size:15px;cursor:pointer}.text-btn:hover{color:var(--ink);background:var(--line)}.icon-only{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border:0;border-radius:8px;background:none;color:var(--ink);cursor:pointer}.icon-only:hover{background:var(--line)}.hero{padding-block:64px 24px}.hero-text{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:24px 64px;align-items:end;margin-bottom:96px}.hero h1{margin:0;font-size:clamp(2.6rem,5.8vw,4.9rem);line-height:.98;font-weight:800;letter-spacing:-.04em;text-wrap:balance}.hero h1 span{display:block}:root[lang=zh-CN] .hero h1 span{white-space:nowrap}:root[lang=zh-CN] .hero h1{font-size:clamp(1.9rem,4.2vw,3.5rem);letter-spacing:0;line-height:1.15}.hero-side{display:grid;gap:22px;min-width:0}.lede{margin:0;max-width:46ch;color:var(--muted);font-size:1.12rem}.cta{display:flex;flex-wrap:wrap;gap:10px}.btn{display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 22px;border-radius:999px;font-weight:600;font-size:16px;text-decoration:none;transition:transform .15s ease,box-shadow .15s ease,background-color .15s ease}.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--blue);color:var(--blue-ink);box-shadow:0 8px 20px -8px var(--blue)}.btn-ghost{background:var(--surface);border:1.5px solid var(--line)}.btn-ghost:hover{border-color:var(--ink)}.badges{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--muted);font-size:14px}.badges li{display:inline-flex;align-items:center;gap:7px}.badges li:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--blue)}.badges li:nth-child(2):before{background:var(--red)}.badges li:nth-child(3):before{background:var(--green)}.badges li:nth-child(4):before{background:var(--yellow)}.board-frame{position:relative;margin:0;padding:12px;border-radius:22px;background:linear-gradient(165deg,var(--rim-hi),var(--rim-lo));box-shadow:0 1px #ffffffb3 inset,0 40px 80px -40px var(--board-shadow),0 14px 28px -16px #0f172a40}.board-surface{height:clamp(440px,68vh,700px);border-radius:12px;overflow:hidden;box-shadow:0 0 0 1px var(--line) inset}.board-tray{position:absolute;left:8%;right:8%;bottom:-14px;height:16px;border-radius:0 0 12px 12px;background:var(--tray);box-shadow:0 8px 14px -8px #0f172a59;display:flex;align-items:flex-start;gap:14px;padding:0 28px}.marker{width:78px;height:11px;margin-top:-4px;border-radius:3px 7px 7px 3px;background:linear-gradient(90deg,var(--c) 0 18%,#f4f5f7 18% 100%);box-shadow:0 1px 2px #00000040}.marker-blue{--c: #2f5bff}.marker-red{--c: #f03e3e}.marker-green{--c: #0ca678}.eraser-block{margin-left:auto;width:58px;height:14px;margin-top:-6px;border-radius:4px;background:linear-gradient(#3a3f4a 0 45%,#ececec 45%);box-shadow:0 1px 2px #00000040}.board-frame figcaption{position:absolute;left:0;right:0;top:calc(100% + 28px);display:flex;justify-content:space-between;align-items:center;gap:12px;color:var(--muted);font-size:15px}.note{position:absolute;margin:0;font-family:var(--hand);font-weight:700;font-size:30px;line-height:1;pointer-events:none;white-space:nowrap}:root[lang=zh-CN] .note{font-size:26px}.note-tools{top:-62px;left:calc(50% - 400px);color:var(--red);transform:rotate(-5deg)}.note-arrow{position:absolute;left:calc(100% + 6px);top:6px;width:92px;height:70px}.note-draw{top:-54px;right:4%;color:var(--blue);transform:rotate(4deg)}.section{padding-block:120px 0}.hero+.section{padding-top:148px}.section h2{margin:0 0 12px;font-size:clamp(2rem,3.6vw,2.8rem);line-height:1.1;letter-spacing:-.03em;font-weight:800;text-wrap:balance}.section-lede{margin:0 0 40px;max-width:60ch;color:var(--muted)}.steps{list-style:none;margin:0;padding:0;counter-reset:step;display:grid;gap:28px;max-width:1040px}.steps>li{--step: var(--blue);counter-increment:step;display:grid;grid-template-columns:260px minmax(0,1fr);gap:28px;align-items:start}.steps>li:nth-child(2){--step: var(--red)}.steps>li:nth-child(3){--step: var(--green)}.step-text{position:relative;padding-left:50px;min-width:0}.step-text:before{content:counter(step);position:absolute;left:0;top:-2px;width:34px;height:34px;border-radius:50%;background:var(--step);color:#fff;display:grid;place-items:center;font-weight:700;font-size:16px}.step-text h3{margin:0 0 4px;font-size:20px;letter-spacing:-.01em}.step-text p{margin:0;color:var(--muted);font-size:15px}.code{position:relative;min-width:0;border-radius:14px;background:var(--code-bg);color:var(--code-fg);box-shadow:0 12px 30px -18px #0f172a99}.code pre{margin:0;padding:18px 88px 18px 20px;overflow-x:auto;font:14px/1.7 var(--mono)}.tok-kw{color:#c9a8ff}.tok-str{color:#9ae6b4}.tok-tag{color:#7cc7ff}.tok-cmd{color:#ffd666}.code-copy{position:absolute;top:12px;right:12px;padding:4px 12px;border-radius:7px;border:1px solid rgba(255,255,255,.14);background:#ffffff0f;color:#c4c8d4;font:13px var(--font);cursor:pointer}.code-copy:hover{color:#fff;background:#ffffff1f}.notes{list-style:none;margin:48px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:36px 28px}.sticky{--tilt: -1.6deg;position:relative;min-height:210px;padding:30px 22px 22px;border-radius:3px 3px 14px;color:var(--note-ink);transform:rotate(var(--tilt));box-shadow:0 1px 1px #0000000f,0 14px 22px -14px #00000059;transition:transform .2s ease}.sticky:nth-child(4n+2){--tilt: 1.2deg}.sticky:nth-child(4n+3){--tilt: -.7deg}.sticky:nth-child(4n){--tilt: 1.8deg}.sticky:hover{transform:rotate(0) translateY(-4px)}.sticky:before{content:"";position:absolute;top:-11px;left:50%;width:72px;height:22px;transform:translate(-50%) rotate(-3deg);background:#ffffff8c;border:1px solid rgba(0,0,0,.05);box-shadow:0 1px 2px #00000014}.sticky-yellow{background:var(--note-yellow)}.sticky-pink{background:var(--note-pink)}.sticky-blue{background:var(--note-blue)}.sticky-green{background:var(--note-green)}.sticky svg{opacity:.75}.sticky h3{margin:10px 0 6px;font-size:19px;line-height:1.25;letter-spacing:-.01em}.sticky p{margin:0;font-size:15px;line-height:1.55;color:#23262dc7}.table-title{margin:36px 0 12px;font-size:20px}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:var(--surface)}table{width:100%;border-collapse:collapse;font-size:15px}th,td{text-align:left;vertical-align:top;padding:13px 18px;border-bottom:1px solid var(--line)}tr:last-child td{border-bottom:0}th{font-weight:600;color:var(--muted);font-size:14px;background:color-mix(in srgb,var(--blue) 5%,transparent)}td code{font:13.5px var(--mono);white-space:nowrap;color:var(--blue)}td code.type{color:var(--muted)}.closing{position:relative;overflow:hidden;margin-top:140px;padding:72px 64px;border-radius:28px;background:var(--blue);color:var(--blue-ink);display:grid;justify-items:start;gap:18px}.closing h2{margin:0;font-family:var(--hand);font-size:clamp(3rem,7vw,5rem);line-height:1;font-weight:700}.closing p{margin:0 0 10px;max-width:44ch;font-size:1.1rem;opacity:.88}.btn-light{background:var(--blue-ink);color:var(--blue)}.closing-doodle{position:absolute;right:-10px;bottom:16px;width:min(420px,50%);opacity:.25;pointer-events:none}.site-footer{display:flex;justify-content:space-between;gap:16px;padding-block:36px 48px;color:var(--muted);font-size:15px}@media(max-width:1080px){.notes{grid-template-columns:repeat(2,minmax(0,1fr))}.note-tools{left:8%}}@media(max-width:860px){.hero-text{grid-template-columns:1fr}.steps>li{grid-template-columns:1fr;gap:14px}.note-draw{display:none}}@media(max-width:640px){.wrap{padding-inline:16px}.header-inner{gap:12px}.site-header nav{display:none}.brand span{font-size:16px}.hero{padding-top:36px}.hero-text{margin-bottom:72px}.note-tools{top:-50px;left:4px;font-size:24px}.note-arrow{width:64px;height:50px}.board-frame{padding:6px;border-radius:16px}.board-surface{height:58vh}.board-tray{left:4%;right:4%;padding:0 14px}.marker{width:48px}.board-frame figcaption{flex-direction:column;align-items:flex-start;gap:4px}.board-frame figcaption .text-btn{margin-left:-10px}.hero+.section{padding-top:150px}.section{padding-top:88px}.notes{grid-template-columns:1fr}.sticky{min-height:0}td code{white-space:normal}.closing{padding:48px 24px;margin-top:100px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn,.sticky{transition:none}}