@charset "UTF-8";
:root{color-scheme:light;--paper:#f8f7f1;--ink:#243e36;--muted:#64756d;--green:#36775d;--pale:#e2ede3;--line:#d5ddd3;--orange:#b76a45;--cream:#fffdf7;--radius:25px;font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);line-height:1.7}a{color:var(--green);text-underline-offset:4px}button,a{-webkit-tap-highlight-color:transparent}a:focus-visible{outline:3px solid #a47735;outline-offset:5px}p{margin:.8em 0 1em}h1,h2,h3{line-height:1.2;letter-spacing:-.035em}h1{font-size:clamp(2.8rem,5.2vw,5.3rem);max-width:850px;margin:.4em 0}h2{font-size:clamp(1.55rem,2.8vw,2.3rem);margin:0 0 .6em}h3{font-size:1.15rem;letter-spacing:-.02em}strong{font-weight:750}code{overflow-wrap:anywhere}.shell{max-width:1160px;margin:auto;padding:0 40px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:28px;min-height:112px}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);font-size:1.45rem;font-weight:800;letter-spacing:-.05em;text-decoration:none;white-space:nowrap}.brand img{width:46px;height:46px}.nav{display:flex;flex-wrap:wrap;align-items:center;gap:24px;font-size:.88rem;font-weight:650}.nav>a{color:var(--muted);text-decoration:none}.nav>a[aria-current=page]{color:var(--ink)}.language-switch{display:flex;gap:8px;align-items:center;border-left:1px solid var(--line);padding-left:20px;white-space:nowrap}.language-switch a{text-decoration:none;color:var(--muted);font-size:.83rem}.language-switch a[aria-current=true]{color:var(--ink);font-weight:850}.hero{padding:54px 0 70px;display:grid;grid-template-columns:1.12fr .88fr;gap:50px;align-items:center}.eyebrow{font-weight:750;font-size:.79rem;letter-spacing:.14em;text-transform:uppercase;color:var(--green);display:flex;align-items:center;gap:9px}.eyebrow:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green)}.lead{font-size:1.15rem;line-height:1.8;color:var(--muted);max-width:650px}.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:28px 0 18px}.button{display:inline-flex;padding:12px 21px;border-radius:100px;background:var(--ink);color:var(--cream);font-weight:700;text-decoration:none;font-size:.94rem}.button.secondary{background:transparent;color:var(--ink);border:1px solid #b8c5b7}.tiny{font-size:.82rem;color:var(--muted);max-width:650px}.stage{position:relative;min-height:335px;border-radius:44px;background:var(--pale);display:flex;align-items:center;justify-content:center;isolation:isolate}.stage:before{content:"";width:75%;height:45px;border-radius:50%;position:absolute;bottom:55px;background:#adc6ae66;filter:blur(5px)}.robots{display:flex;gap:10px;align-items:end;padding:50px 18px 30px}.robot{width:165px;color:#43846a;transform:rotate(-8deg)}.robot.orange{width:140px;color:#bc7a51;transform:rotate(9deg) translateY(-4px)}.robot svg{display:block;width:100%;height:auto}.bubble{position:absolute;background:var(--cream);font-size:1.1rem;font-weight:800;padding:10px 19px;border-radius:17px;top:27px;left:25px;transform:rotate(-5deg)}.bubble:after{content:"";position:absolute;bottom:-7px;left:27px;width:16px;height:16px;background:var(--cream);transform:rotate(45deg)}.bubble.answer{top:86px;left:auto;right:24px;color:var(--orange);transform:rotate(6deg)}.stage-note{position:absolute;bottom:14px;width:100%;text-align:center;font-size:.72rem;color:#5d7767}.section{padding:54px 0;border-top:1px solid var(--line)}.section-heading{max-width:670px;margin-bottom:28px}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}.step{padding-top:20px;border-top:2px solid var(--line)}.step-number{font-family:ui-monospace,monospace;color:var(--orange);font-size:.75rem;font-weight:800}.step p{color:var(--muted);font-size:.96rem}.rules{display:grid;grid-template-columns:1fr 1fr;gap:35px}.rules p{margin:0;color:var(--muted)}.rule{display:grid;grid-template-columns:34px 1fr;gap:10px}.rule-mark{font-size:1.25rem;color:var(--orange);font-weight:800}.rule strong{display:block;color:var(--ink);margin-bottom:5px}.notice{border:1px solid var(--line);background:#eef1e8;border-radius:var(--radius);padding:25px 30px;margin:24px 0}.notice p:last-child{margin-bottom:0}.notice h2{font-size:1.3rem;letter-spacing:-.02em}.draft{background:#f4e8ce;border-bottom:1px solid #dbc69c;color:#5d4b29;padding:10px 40px;font-size:.86rem;text-align:center}.article-head{padding:48px 0 35px;border-bottom:1px solid var(--line)}.article-head h1{font-size:clamp(2.5rem,5vw,4.4rem)}.article-head .lead{max-width:820px}.article-layout{display:grid;grid-template-columns:200px minmax(0,1fr);gap:65px;padding:45px 0 70px}.aside{font-size:.85rem;color:var(--muted)}.aside p{margin-top:0}.aside a{display:block;margin:11px 0;text-decoration:none}.prose{max-width:760px}.prose section+section{margin-top:37px}.prose h2{font-size:1.45rem}.prose h3{font-size:1.05rem;letter-spacing:0}.prose p,.prose li{color:#4c6257}.prose ul,.prose ol{padding-left:1.3em}.prose li{margin:.45em 0}.facts{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:25px 0}.fact{padding:20px 23px;border:1px solid var(--line);border-radius:20px}.fact p{margin:4px 0 0;font-size:.92rem}.fact-label{font-size:.76rem;color:var(--muted)}.contact{background:var(--ink);color:var(--cream);padding:28px;border-radius:var(--radius);margin:25px 0;overflow-wrap:anywhere}.contact h2{color:var(--cream)}.contact p,.contact a{color:#e7f0e4}.contact a{font-weight:750}.warning{color:#885b22!important;background:#f5e9ce;padding:14px 18px;border-radius:12px;font-size:.9rem}.footer{border-top:1px solid var(--line);padding:28px 0 35px;display:flex;gap:25px;justify-content:space-between;align-items:start;font-size:.8rem;color:var(--muted)}.footer p{margin:0}.footer-links{display:flex;flex-wrap:wrap;gap:18px}.footer a{color:var(--muted)}.skip{position:absolute;top:-80px;left:20px;background:var(--ink);color:white;padding:12px;z-index:10}.skip:focus{top:10px}[hidden]{display:none!important}
.robots{max-width:100%;width:100%;justify-content:center}.robot{flex:0 1 165px;min-width:0}.robot.orange{flex-basis:140px}
@media(max-width:850px){.shell{padding:0 25px}.topbar{align-items:flex-start;padding:24px 0;min-height:0;flex-direction:column;gap:17px}.nav{gap:19px;font-size:.82rem}.language-switch{padding-left:14px}.hero{padding-top:32px;gap:35px;grid-template-columns:1fr}.hero-copy{max-width:700px}.stage{min-height:300px;max-width:560px;width:100%}.robots{padding-top:38px}.robot{width:155px;flex-basis:155px}.robot.orange{width:130px;flex-basis:130px}.hero h1{max-width:650px}.steps{gap:20px}.article-layout{grid-template-columns:1fr;gap:25px}.aside{border-bottom:1px solid var(--line);padding-bottom:18px}.aside a{display:inline-block;margin:0 18px 8px 0}.aside p{margin-bottom:7px}.footer{flex-direction:column;gap:15px}}
@media(max-width:520px){.shell{padding:0 21px}.nav{gap:14px}.language-switch{border:0;padding-left:0}.hero{padding-bottom:45px}.lead{font-size:1.03rem}.stage{border-radius:32px;min-height:280px}.robot{width:140px;flex-basis:140px}.robot.orange{width:120px;flex-basis:120px}.bubble{font-size:.92rem;top:23px;left:18px}.bubble.answer{right:18px;top:70px}.steps,.rules,.facts{grid-template-columns:1fr}.steps{gap:18px}.step{padding-top:15px}.section{padding:37px 0}.notice{padding:22px}.article-head{padding-top:30px}.article-layout{padding-top:28px}.draft{padding:10px 20px}.footer-links{gap:14px}.actions{align-items:stretch}.button{justify-content:center}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}