:root{--mat:#d7ebe2;--mat2:#bfdccf;--paper:#fdfcf5;--ink:#15312a;--ink2:#3c564e;--g:#0a6a52;--gd:#074a39;--hl:#ffee70;--hl2:#a9efd3;--red:#cf3f36;--pen:#a92a22;--rule:#d5e5dd;--dot:rgba(21,49,42,.17);--code:#0f2a24;
--hand:"Ma Shan Zheng","Noto Sans SC","PingFang SC","Microsoft YaHei",cursive;--sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;--mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;--gut:124px;--w:1180px}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font:400 1rem/1.75 var(--sans);color:var(--ink);background:var(--mat);background-image:linear-gradient(rgba(10,106,82,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(10,106,82,.07) 1px,transparent 1px);background-size:48px 48px;overflow-x:clip;counter-reset:sec}
[hidden]{display:none!important}
a{color:var(--g);text-underline-offset:.2em;text-decoration-thickness:1.5px}
a:hover{color:var(--gd)}
:focus-visible{outline:3px solid var(--g);outline-offset:3px;border-radius:4px}
h1,h2,h3,p,ul,ol{margin:0}
h1,h2,h3{line-height:1.25;overflow-wrap:anywhere}
p,li{overflow-wrap:anywhere}
mark{color:inherit;background:linear-gradient(100deg,transparent 1%,var(--hl) 3% 97%,transparent 99%);padding:.12em .45em;border-radius:.3em .8em .4em .7em;-webkit-box-decoration-break:clone;box-decoration-break:clone}
.skip{position:absolute;left:12px;top:-80px;z-index:99;background:var(--ink);color:#fff;padding:12px 18px;border-radius:10px}
.skip:focus{top:12px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 24px;border-radius:999px;background:var(--g);color:#fff;font:700 1rem/1.2 var(--sans);text-decoration:none;border:2px solid var(--ink);box-shadow:0 4px 0 var(--ink);cursor:pointer;transition:transform .12s,box-shadow .12s;text-align:center}
.btn:hover{color:#fff;transform:translateY(2px);box-shadow:0 2px 0 var(--ink)}
.btn:active{transform:translateY(4px);box-shadow:none}
.btn[disabled]{opacity:.6;cursor:wait}
.btn.big{min-height:56px;padding:0 30px;font-size:1.08rem}
.btn.ghost{background:var(--paper);color:var(--ink)}
.btn.ghost:hover{color:var(--ink);background:#fff}
.btn.y{background:var(--hl);color:var(--ink)}
.btn.line{background:transparent;color:#fff;border-color:#fff;box-shadow:none}
.btn.sm{min-height:44px;padding:0 16px;font-size:.92rem;box-shadow:0 3px 0 var(--ink)}

/* header pill */
.top{position:sticky;top:10px;z-index:50;padding:0 14px;margin-top:10px}
.pill{position:relative;max-width:var(--w);margin:0 auto;display:flex;align-items:center;gap:8px;padding:7px 8px 7px 18px;background:var(--paper);border:2px solid var(--ink);border-radius:999px;box-shadow:0 10px 24px -14px rgba(21,49,42,.6)}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font:400 1.55rem/1 var(--hand);white-space:nowrap;min-height:44px}
.logo:hover{color:var(--g)}
.mark{flex:none;transform:rotate(-5deg)}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto;margin-right:8px}
.nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 16px;color:var(--ink);text-decoration:none;font-weight:500;border-radius:999px}
.nav a:hover{background:var(--hl2)}
.nav a[aria-current]{font-weight:700;background:linear-gradient(100deg,transparent 3%,var(--hl) 6% 94%,transparent 97%) center/100% 62% no-repeat}
.hcta{min-height:46px;padding:0 20px;white-space:nowrap}
.burger{display:none;width:46px;height:46px;flex:none;align-items:center;justify-content:center;background:transparent;border:2px solid var(--ink);border-radius:50%;color:var(--ink);cursor:pointer}

main{max-width:calc(var(--w) + 28px);margin:0 auto;padding:30px 14px 10px;display:flex;flex-direction:column;gap:34px}
main>*{min-width:0}

/* paper sheet */
.sheet{position:relative;background:var(--paper);background-image:radial-gradient(var(--dot) 1px,transparent 1.5px);background-size:22px 22px;border:1px solid #c6dbd1;border-radius:6px 16px 16px 6px;padding:46px 54px 52px var(--gut);box-shadow:0 5px 0 -1px #f1efe2,0 6px 0 -1px #bcd3c8,0 22px 34px -24px rgba(21,49,42,.55)}
.sheet::before{content:"";position:absolute;left:96px;top:0;bottom:0;width:2px;background:var(--red);opacity:.5}
.sheet::after{content:"";position:absolute;left:20px;top:26px;bottom:26px;width:20px;background:radial-gradient(circle,var(--mat) 0 6.5px,rgba(21,49,42,.28) 7px,transparent 8.5px) center top/20px 132px repeat-y}
.sheet.lined{background-image:repeating-linear-gradient(transparent 0 33px,var(--rule) 33px 34px);background-size:auto}
.sheet.graph{background-image:linear-gradient(var(--rule) 1px,transparent 1px),linear-gradient(90deg,var(--rule) 1px,transparent 1px);background-size:22px 22px}
.sheet>*{position:relative;z-index:1;min-width:0}
h2.sec{position:relative;font-size:clamp(1.5rem,2.6vw,2rem);font-weight:700;margin-bottom:28px}
h2.sec::before{counter-increment:sec;content:counter(sec,decimal-leading-zero);font:400 2.3rem/1 var(--hand);color:var(--pen);display:inline-block;margin-right:.35em;transform:rotate(-7deg)}
.sheet h2.sec::before{position:absolute;left:-88px;top:-.1em;width:52px;text-align:right;margin:0}
.plain{padding:6px 6px 0}
h1{font:400 clamp(2.15rem,4.9vw,3.9rem)/1.18 var(--hand);letter-spacing:.01em}
.scr{display:block;width:min(240px,60%);height:16px;color:var(--g);margin:10px 0 0}
.lead{font-size:1.14rem;line-height:1.8;color:var(--ink2);margin-top:18px;max-width:46em}

/* hero */
.hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.02fr);gap:52px;align-items:center;padding-top:58px;padding-bottom:60px}
.mnote{position:absolute!important;left:52px;bottom:40px;writing-mode:vertical-rl;transform:rotate(180deg);font:400 .78rem/1 var(--mono);color:var(--pen);letter-spacing:.04em;white-space:nowrap;max-height:calc(100% - 80px);overflow:hidden}
.eyebrow{font-weight:700;font-size:.98rem;margin-bottom:18px;line-height:2}
.ticks{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:10px}
.ticks li{position:relative;padding-left:34px;font-weight:500}
.ticks li::before{content:"";position:absolute;left:0;top:.2em;width:24px;height:24px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M3 13c2 2 4 4 6 7 3-7 7-12 13-17' fill='none' stroke='%23a92a22' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat}
.btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-r{position:relative}
.lbl{font:400 1.5rem/1 var(--hand);color:var(--pen);margin:0 0 20px 8px;transform:rotate(-3deg);transform-origin:left;display:inline-block}

/* code */
.codebox{position:relative;background:var(--code);border:2px solid var(--ink);border-radius:12px;box-shadow:0 18px 30px -18px rgba(21,49,42,.75)}
.codebox::before,.codebox::after{content:"";position:absolute;top:-15px;width:96px;height:28px;background:repeating-linear-gradient(90deg,rgba(255,238,112,.9) 0 8px,rgba(255,226,70,.9) 8px 16px);transform:rotate(-5deg);left:26px;z-index:2;box-shadow:0 2px 4px rgba(21,49,42,.2)}
.codebox::after{left:auto;right:150px;transform:rotate(3deg);background:repeating-linear-gradient(90deg,rgba(169,239,211,.92) 0 8px,rgba(130,224,188,.92) 8px 16px)}
.codetabs{display:flex;gap:2px;padding:14px 100px 0 14px;border-bottom:1px solid rgba(255,255,255,.14)}
.codetabs button{min-height:44px;padding:0 14px;background:transparent;border:0;border-bottom:3px solid transparent;color:#b6d3c8;font:600 .86rem/1 var(--mono);cursor:pointer}
.codetabs button:hover{color:#fff}
.codetabs button[aria-selected="true"]{color:#fff;border-bottom-color:var(--hl)}
pre.code{position:relative;margin:1.5em 0;background:var(--code);color:#e6f4ee;border:2px solid var(--ink);border-radius:12px;font:400 .84rem/1.75 var(--mono);overflow:hidden;max-width:100%;padding-top:52px;background-image:linear-gradient(rgba(255,255,255,.06),rgba(255,255,255,.06));background-size:100% 52px;background-repeat:no-repeat;tab-size:2}
pre.code code{display:block;overflow-x:auto;padding:16px 20px 20px;font:inherit;background:none;color:inherit;white-space:pre}
.codebox pre.code{position:static;margin:0;border:0;border-radius:0 0 10px 10px;padding-top:0;background-image:none}
.copy{position:absolute;top:4px;right:8px;z-index:3;min-height:44px;min-width:60px;padding:0 14px;background:transparent;color:#e6f4ee;border:1.5px dashed rgba(255,255,255,.5);border-radius:8px;font:500 .84rem/1 var(--sans);cursor:pointer}
.codebox .copy{top:14px;right:12px}
.copy:hover{background:var(--hl);color:var(--ink);border-color:var(--hl)}
.codebox :focus-visible,pre.code :focus-visible,pre.code:focus-visible,.cta :focus-visible{outline-color:var(--hl)}
.code .k{color:#7fe6c2}.code .s{color:#ffe27a}.code .c{color:#93b5a9;font-style:italic}

/* sticky notes */
.stickies{list-style:none;padding:0 8px;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:20px}
.stickies li{position:relative;padding:22px 16px 20px;background:#fff3a3;box-shadow:1px 8px 12px -6px rgba(21,49,42,.45);transform:rotate(-1.4deg);min-width:0}
.stickies li::before{content:"";position:absolute;top:-10px;left:50%;width:64px;height:20px;margin-left:-32px;background:rgba(255,255,255,.55);box-shadow:0 1px 2px rgba(21,49,42,.15);transform:rotate(2deg)}
.stickies li:nth-child(2n){background:#c8f4e0;transform:rotate(1.2deg)}
.stickies li:nth-child(3n){background:#ffdcd4;transform:rotate(-.6deg)}
.stickies li:nth-child(5n){background:#fff;transform:rotate(1.6deg)}
.stickies b{display:block;font:400 2.5rem/1.05 var(--hand);color:var(--ink)}
.stickies span{display:block;margin-top:8px;font-size:.9rem;line-height:1.45;color:var(--ink2);font-weight:500}
.stickies.tags b{font-size:3rem}

/* features / pairs */
.feat{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0}
.feat .it{padding:26px 28px 28px 0;border-top:1.5px dashed #9db8ad;min-width:0}
.feat .it:nth-child(3n+2),.feat .it:nth-child(3n){padding-left:28px;border-left:1.5px dashed #9db8ad}
.it h3,.steps h3{font-size:1.14rem;font-weight:700;margin-bottom:10px}
.feat h3,.ben h3{display:inline;background:linear-gradient(transparent 58%,var(--hl2) 58% 94%,transparent 94%);padding:0 .15em;-webkit-box-decoration-break:clone;box-decoration-break:clone}
.feat p,.ben p{margin-top:12px}
.it p,.steps p{color:var(--ink2);font-size:.98rem}
.steps{list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px;counter-reset:st}
.steps li{position:relative;counter-increment:st;min-width:0}
.steps li::before{content:counter(st);display:grid;place-items:center;width:66px;height:66px;margin-bottom:14px;font:400 2.2rem/1 var(--hand);color:var(--pen);background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 66 66'%3E%3Cpath d='M36 5C18 3 5 16 5 33c0 17 13 29 29 28 16-1 28-13 27-30C60 16 48 6 30 8' fill='%23fff8b8' stroke='%23a92a22' stroke-width='2.6' stroke-linecap='round'/%3E%3C/svg%3E") center/contain no-repeat}
.steps li:not(:last-child)::after{content:"";position:absolute;left:84px;right:-10px;top:22px;height:26px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 26' preserveAspectRatio='none'%3E%3Cpath d='M2 15c40-9 120-11 190-3' fill='none' stroke='%2315312a' stroke-width='2' stroke-linecap='round' stroke-dasharray='7 7'/%3E%3C/svg%3E") left center/calc(100% - 14px) 100% no-repeat,url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 26'%3E%3Cpath d='M3 4l12 8-11 10' fill='none' stroke='%2315312a' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") right center/18px 26px no-repeat;opacity:.7}
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.cards.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.cards .it{position:relative;background:#fff;border:1px solid #c6dbd1;border-radius:4px;padding:34px 26px 26px;box-shadow:0 14px 22px -18px rgba(21,49,42,.6);background-image:linear-gradient(var(--red),var(--red)),repeating-linear-gradient(transparent 0 29px,#dbe9f1 29px 30px);background-size:100% 2px,auto;background-position:0 22px,0 24px;background-repeat:no-repeat,repeat;min-width:0}
.cards .it:nth-child(odd){transform:rotate(-.5deg)}
.cards .it:nth-child(even){transform:rotate(.4deg)}
.cards h3{font-size:1.2rem}

/* prose */
.prose{max-width:46em;font-size:1.04rem;line-height:1.9}
.prose>*+*{margin-top:1.1em}
.prose h2{position:relative;font-size:1.55rem;font-weight:700;margin-top:2.2em;scroll-margin-top:96px}
.prose>h2:first-child{margin-top:0}
.prose h2::before{content:"";position:absolute;left:-76px;top:.1em;width:30px;height:30px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath d='M15 3v24M5 8l20 14M25 8L5 22' fill='none' stroke='%23a92a22' stroke-width='2.6' stroke-linecap='round'/%3E%3C/svg%3E") center/contain no-repeat;transform:rotate(8deg)}
.prose h2::after{content:"";display:block;width:120px;height:9px;margin-top:6px;background:var(--hl);border-radius:4px 9px 3px 8px;transform:rotate(-.6deg)}
.prose h3{font-size:1.2rem;font-weight:700;margin-top:1.8em;scroll-margin-top:96px}
.prose ul,.prose ol{padding-left:1.4em}
.prose li+li{margin-top:.4em}
.prose li::marker{color:var(--pen);font-weight:700}
.prose strong{font-weight:700;background:linear-gradient(transparent 62%,var(--hl) 62% 95%,transparent 95%)}
.prose :not(pre)>code,.keyout code{font:500 .9em var(--mono);background:#e3f1ea;border:1px solid #c6dbd1;padding:.1em .4em;border-radius:5px;overflow-wrap:anywhere;word-break:break-all}
.prose table{width:100%;border-collapse:separate;border-spacing:0;overflow:hidden;font-size:.96rem;line-height:1.6;background:#fff;border:2px solid var(--ink);border-radius:8px}
.prose th,.prose td{padding:11px 16px;text-align:left;vertical-align:top;border-bottom:1.5px dashed #9db8ad;min-width:8em}
.prose th{background:var(--hl2);font-weight:700;border-bottom:2px solid var(--ink)}
.prose tr:last-child td{border-bottom:0}
.prose blockquote{margin-left:0;margin-right:0;padding:4px 0 4px 18px;border-left:3px solid var(--red);color:var(--ink2)}

/* faq */
.faq details{border-bottom:1.5px dashed #9db8ad}
.faq details:first-of-type{border-top:1.5px dashed #9db8ad}
.faq summary{position:relative;list-style:none;cursor:pointer;padding:17px 52px 17px 0;font-weight:700;font-size:1.06rem;min-height:44px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:8px;top:8px;font:400 2.1rem/1.2 var(--hand);color:var(--pen)}
.faq details[open] summary::after{content:"\2013"}
.faq details[open] summary{background:linear-gradient(transparent 60%,var(--hl) 60% 90%,transparent 90%) left/min(100%,22em) 100% no-repeat}
.faq details p{padding:0 52px 20px 0;color:var(--ink2);max-width:48em}

/* cta */
.cta{display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;background:var(--gd);background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1.5px);background-size:22px 22px;color:#fff;border:2px solid var(--ink);border-radius:6px 16px 16px 6px;padding:44px 54px 46px var(--gut);position:relative}
.cta::before{content:"";position:absolute;left:96px;top:0;bottom:0;width:2px;background:#ff9a8f;opacity:.7}
.cta>div{min-width:0}
.cta h2{font:400 clamp(1.8rem,3.4vw,2.6rem)/1.2 var(--hand)}
.cta p{margin-top:10px;color:#d9eee5;max-width:34em}
.cta-b{display:flex;flex-wrap:wrap;gap:14px}
.cta .btn.y{box-shadow:0 4px 0 #021d16}
.cta .btn.line:hover{background:rgba(255,255,255,.12)}
.tail{text-align:center}

/* page head */
.phead{padding-top:38px;padding-bottom:44px}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:.9rem;color:var(--ink2);margin-bottom:18px}
.crumbs a{display:inline-flex;align-items:center;min-height:44px;color:var(--ink2)}
.crumbs [aria-current]{font-weight:700;color:var(--ink)}
.sub{margin-top:22px;font-weight:700;line-height:2.1}
.upd{margin-top:18px;font:400 1.25rem/1.2 var(--hand);color:var(--pen)}

/* key page */
.keygrid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,470px);grid-template-areas:"h f" "b f";gap:30px;align-items:start}
.khead{grid-area:h}.kben{grid-area:b}.kform{grid-area:f;position:relative}
.khead h1{font-size:clamp(2.1rem,4vw,3.2rem)}
.pad{position:relative;background:#fff6b8;background-image:repeating-linear-gradient(transparent 0 31px,rgba(10,106,82,.16) 31px 32px);border:2px solid var(--ink);border-radius:4px 4px 14px 14px;padding:62px 30px 30px;box-shadow:0 5px 0 -1px #f3e896,0 6px 0 -1px var(--ink),0 26px 36px -22px rgba(21,49,42,.7)}
.pad::before{content:"";position:absolute;left:-2px;right:-2px;top:-2px;height:36px;background:var(--g);border:2px solid var(--ink);border-radius:4px 4px 0 0;background-image:radial-gradient(circle,rgba(255,255,255,.5) 0 2px,transparent 2.5px);background-size:18px 18px;background-position:center}
.clip{position:absolute;right:34px;top:-26px;width:34px;height:78px;z-index:2;transform:rotate(8deg)}
.pad h2{font:400 1.9rem/1.2 var(--hand)}
.side{margin-top:6px;color:var(--ink2);font-size:.96rem;line-height:1.65}
.form{margin-top:20px}
.tabs2{display:flex;gap:6px;border-bottom:2px solid var(--ink)}
.tabs2 button{flex:1;min-height:48px;padding:0 10px;background:transparent;border:2px solid transparent;border-bottom:0;border-radius:10px 10px 0 0;font:700 1rem/1.2 var(--sans);color:var(--ink2);cursor:pointer;margin-bottom:-2px}
.tabs2 button:hover{color:var(--ink)}
.tabs2 button[aria-selected="true"]{background:#fff;color:var(--ink);border-color:var(--ink);border-bottom:2px solid #fff}
.msg{display:none}
.msg.err{display:block;margin-top:16px;padding:10px 14px;background:#fff;border-left:4px solid var(--red);color:var(--pen);font-weight:700;border-radius:0 8px 8px 0}
.form form{margin-top:20px;display:grid;gap:18px}
.row{min-width:0}
.row label,.calc label{display:block;font-weight:700;font-size:.94rem;margin-bottom:6px}
.row input,.calc input{display:block;width:100%;min-height:52px;padding:0 14px;font:500 1.02rem/1 var(--mono);color:var(--ink);background:#fff;border:2px solid var(--ink);border-radius:10px;box-shadow:inset 0 3px 0 rgba(21,49,42,.08)}
.row input:focus,.calc input:focus{outline:3px solid var(--g);outline-offset:2px;background:#fffef2}
.note{font-size:.88rem;line-height:1.6;color:var(--ink2);margin-top:6px}
.form .btn[data-submit]{width:100%;min-height:58px;font-size:1.08rem}
.keyout{display:none;margin-top:6px}
.keyout.on{display:block}
.keyout h3{font:400 1.6rem/1.2 var(--hand);margin-bottom:12px}
.keybox{display:flex;align-items:center;gap:10px;background:#fff;border:2px dashed var(--ink);border-radius:10px;padding:10px 10px 10px 14px}
.keybox span{flex:1;min-width:0;font:600 .92rem/1.5 var(--mono);word-break:break-all}
.keyout p{margin-top:12px;line-height:2}
.keyout p.note{line-height:1.6}
.mut{color:var(--ink2)}
.acts{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.ben{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 34px}
.kben{padding-top:38px;padding-bottom:40px}

/* calc */
.calc{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px;align-items:end;max-width:900px}
.calc>div{min-width:0}
.calc output{display:block;font:400 3.4rem/1.1 var(--hand);color:var(--g);padding:0 .15em;background:linear-gradient(transparent 55%,var(--hl) 55% 92%,transparent 92%);width:fit-content;max-width:100%;overflow-wrap:anywhere}

/* docs + article */
.cols{display:grid;grid-template-columns:270px minmax(0,1fr);gap:30px;align-items:start}
.side-col{position:sticky;top:92px;display:grid;gap:22px;min-width:0}
.toc{background:#fff6b8;padding:26px 20px 22px;box-shadow:1px 10px 14px -8px rgba(21,49,42,.5);transform:rotate(-.8deg);position:relative}
.toc::before{content:"";position:absolute;top:-11px;left:50%;width:84px;height:22px;margin-left:-42px;background:rgba(255,255,255,.6);box-shadow:0 1px 2px rgba(21,49,42,.18);transform:rotate(2deg)}
.toc-h{font:400 1.5rem/1.2 var(--hand);color:var(--pen);margin-bottom:8px}
.toc ol{list-style:none;padding:0;counter-reset:tc}
.toc li{counter-increment:tc;border-bottom:1px solid rgba(21,49,42,.2)}
.toc li:last-child{border-bottom:0}
.toc a{display:flex;gap:8px;align-items:baseline;min-height:44px;padding:9px 0;color:var(--ink);text-decoration:none;font-size:.94rem;line-height:1.5;font-weight:500}
.toc a::before{content:counter(tc) ".";font:400 1.15rem/1 var(--hand);color:var(--pen);flex:none}
.toc a:hover{text-decoration:underline;color:var(--gd)}
.sidecta{background:var(--paper);border:2px solid var(--ink);border-radius:14px;padding:20px;display:grid;gap:14px}
.sidecta p{font-weight:700;line-height:1.5}
.art-main{display:grid;gap:30px;min-width:0}
.take{position:relative;background:#c8f4e0;border:2px solid var(--ink);border-radius:4px 14px 14px 4px;padding:26px 30px 28px 34px;border-left:10px solid var(--g)}
.take-h{font:400 1.8rem/1.2 var(--hand);margin-bottom:12px}
.take ul{list-style:none;padding:0;display:grid;gap:10px}
.take li{position:relative;padding-left:32px;font-weight:500}
.take li::before{content:"";position:absolute;left:0;top:.25em;width:22px;height:22px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M3 13c2 2 4 4 6 7 3-7 7-12 13-17' fill='none' stroke='%23a92a22' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat}

/* 404 */
.nf{text-align:left;padding-top:70px;padding-bottom:70px}
.nf-l{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:6px 22px;margin-top:22px}
.nf-l a{display:inline-flex;align-items:center;min-height:44px;font-weight:700}

/* footer */
.foot{margin-top:44px;padding:0 14px 30px}
.foot-in{max-width:var(--w);margin:0 auto;border-top:2px dashed var(--ink);padding-top:26px;display:grid;grid-template-columns:auto minmax(0,1fr);gap:8px 30px;align-items:center}
.tag{color:var(--ink2)}
.foot-l{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:0 6px;justify-content:flex-end}
.foot-l a{display:inline-flex;align-items:center;min-height:44px;padding:0 10px;color:var(--ink);font-weight:500}
.legal{grid-column:1/-1;font-size:.86rem;color:var(--ink2);line-height:1.6}

@media (max-width:1040px){
.stickies{grid-template-columns:repeat(3,minmax(0,1fr))}
.hero{grid-template-columns:minmax(0,1fr);gap:40px}
.keygrid{grid-template-columns:minmax(0,1fr) minmax(0,400px)}
.ben{grid-template-columns:minmax(0,1fr)}
.cards.three{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:880px){
:root{--gut:38px}
.nav{display:none;position:absolute;left:0;right:0;top:calc(100% + 10px);margin:0;flex-direction:column;align-items:stretch;gap:2px;padding:10px;background:var(--paper);border:2px solid var(--ink);border-radius:20px;box-shadow:0 18px 30px -16px rgba(21,49,42,.7)}
.nav.open{display:flex}
.nav a{min-height:48px}
.hcta{margin-left:auto}
.burger{display:inline-flex}
.sheet,.cta{padding:32px 20px 36px var(--gut);border-radius:4px 12px 12px 4px}
.sheet::before,.cta::before{left:20px}
.sheet::after,.mnote,.prose h2::before{display:none}
.sheet h2.sec::before{position:static;width:auto;margin-right:.35em}
.keygrid{grid-template-columns:minmax(0,1fr);grid-template-areas:"h" "f" "b";gap:26px}
.cols{grid-template-columns:minmax(0,1fr)}
.side-col{position:static}
.side-col .sidecta{display:none}
.prose table{display:block;width:auto;max-width:100%;overflow-x:auto}
.prose th,.prose td{min-width:7em}
.toc{transform:none}
.feat{grid-template-columns:minmax(0,1fr)}
.feat .it,.feat .it:nth-child(3n+2),.feat .it:nth-child(3n){padding:22px 0;border-left:0}
.steps{grid-template-columns:minmax(0,1fr);gap:28px}
.steps li::after{display:none}
.steps li{padding-left:82px;min-height:70px}
.steps li::before{position:absolute;left:0;top:-4px;margin:0}
.calc{grid-template-columns:minmax(0,1fr)}
.cta{flex-direction:column;align-items:flex-start}
.foot-in{grid-template-columns:minmax(0,1fr)}
.foot-l{justify-content:flex-start;margin-left:-10px}
.phead{padding-top:22px}
.ben{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:620px){
main{gap:26px;padding-top:22px}
.pill{padding-left:12px;gap:6px}
.logo{font-size:1.3rem;gap:7px}
.mark{width:28px;height:28px}
.hcta{padding:0 13px;font-size:.88rem;min-height:44px;box-shadow:0 3px 0 var(--ink)}
.burger{width:44px;height:44px}
.stickies{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 14px}
.stickies li:last-child:nth-child(odd){grid-column:1/-1}
.stickies b{font-size:2.1rem}
.cards{grid-template-columns:minmax(0,1fr)}
.cards .it{transform:none!important}
.ben{grid-template-columns:minmax(0,1fr);gap:22px}
.pad{padding:56px 18px 22px}
.btns .btn,.cta-b .btn{flex:1 1 100%}
.cta-b{width:100%}
.lead{font-size:1.05rem}
.khead{padding-top:14px;padding-bottom:26px}
.khead .crumbs{margin-bottom:6px}
.prose{font-size:1rem}
.faq summary{padding-right:44px}
.faq details p{padding-right:0}
.codetabs{padding-right:84px}
.codetabs button{padding:0 9px}
.codebox::after{right:96px}
}
@media (max-width:380px){
.logo span{font-size:1.15rem}
.hcta{padding:0 10px;font-size:.82rem}
}
@media (prefers-reduced-motion:reduce){
html{scroll-behavior:auto}
*,*::before,*::after{transition:none!important;animation:none!important}
}