:root{--ink:#0b2536;--ink-2:#153f55;--mint:#6ee7c7;--mint-soft:#dff9f1;--paper:#f7faf9;--white:#fff;--muted:#5f7180;--line:#d9e4e7;--amber:#ffbf69;--shadow:0 18px 50px #0b25361a;--radius:20px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);background:var(--paper);text-rendering:optimizelegibility;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6}a{color:inherit}a:focus-visible,button:focus-visible,input:focus-visible{outline-offset:3px;outline:3px solid #168f77}img{max-width:100%;display:block}button,input{font:inherit}.shell{width:min(1120px,100% - 40px);margin-inline:auto}.site-header{z-index:20;backdrop-filter:blur(14px);background:#f7faf9e6;border-bottom:1px solid #d9e4e7cc;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;gap:24px;min-height:72px;display:flex}.brand{letter-spacing:-.03em;align-items:center;gap:10px;font-size:1.2rem;font-weight:800;text-decoration:none;display:inline-flex}.brand>span>span{color:#168f77}nav{gap:28px;display:flex}nav a{color:var(--muted);font-size:.94rem;font-weight:650;text-decoration:none}nav a:hover{color:var(--ink)}h1{letter-spacing:-.065em;max-width:760px;margin:22px 0 20px;font-size:clamp(2.7rem,6vw,5rem);line-height:.98}.hero-actions{flex-wrap:wrap;gap:12px;display:flex}.button{border:1px solid var(--ink);border-radius:12px;justify-content:center;align-items:center;min-height:48px;padding:12px 20px;font-weight:780;text-decoration:none;display:inline-flex}.button-primary{color:var(--white);background:var(--ink)}.button-secondary{color:var(--ink);background:#ffffffb8}.button:hover{transform:translateY(-1px);box-shadow:0 10px 25px #0b25361f}.section{padding:88px 0}.section-white{background:var(--white)}.section-head{justify-content:space-between;align-items:end;gap:30px;margin-bottom:36px;display:flex}.kicker{color:#11745f;letter-spacing:.08em;text-transform:uppercase;font-size:.8rem;font-weight:850}h2{letter-spacing:-.045em;margin:7px 0 0;font-size:clamp(2rem,4vw,3rem);line-height:1.08}.section-head p{max-width:470px;color:var(--muted);margin:0}.cards{grid-template-columns:repeat(3,1fr);gap:18px;display:grid}.card{border:1px solid var(--line);border-radius:var(--radius);background:var(--white);flex-direction:column;min-height:240px;padding:26px;text-decoration:none;transition:transform .2s,box-shadow .2s;display:flex}.card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}.card-icon{background:var(--mint-soft);border-radius:14px;place-items:center;width:48px;height:48px;margin-bottom:28px;font-size:1.35rem;display:grid}.card :is(h3,h4){margin:0 0 7px;font-size:1.2rem}.card p{color:var(--muted);margin:0;font-size:.92rem}.card span{color:#11745f;margin-top:auto;padding-top:22px;font-size:.88rem;font-weight:750}.guide-group+.guide-group{margin-top:48px}.guide-card{min-height:270px}.guide-meta{color:#11745f;letter-spacing:.08em;text-transform:uppercase;margin-bottom:22px;font-size:.78rem;font-weight:850}.guide-card :is(h3,h4){line-height:1.25}.prose{width:min(760px,100% - 40px);margin:0 auto;padding:70px 0 100px}.prose h1{font-size:clamp(2.4rem,5vw,4rem)}.prose h2{margin-top:2.2em;font-size:1.7rem}.prose h3{margin-top:1.8em;font-size:1.25rem}.prose p,.prose li{color:#405664}.prose li+li{margin-top:.55rem}.prose blockquote{border-left:4px solid var(--amber);background:#fff8ed;border-radius:8px;margin:28px 0;padding:18px 20px}.prose blockquote p{color:var(--ink);margin:0}.article-guide{width:min(960px,100% - 40px);font-size:1.125rem;line-height:1.75}.article-guide h1{max-width:none;line-height:1.05}.article-guide :is(h2,h3){line-height:1.25}.article-guide table{border:1px solid var(--line);border-spacing:0;background:var(--white);overflow-wrap:anywhere;border-radius:16px;width:100%;margin:28px 0;line-height:1.6}.article-guide :is(th,td){text-align:left;vertical-align:top;padding:20px 24px}.article-guide thead th{color:var(--ink);background:#e4f1ec;font-size:1rem;font-weight:750}.article-guide thead th:first-child{border-top-left-radius:15px}.article-guide thead th:last-child{border-top-right-radius:15px}.article-guide tbody td{border-top:1px solid var(--line);color:#405664;hyphens:auto}.article-guide tbody tr:nth-child(2n){background:#f2f7f5}.article-guide :is(th,td):first-child{width:40%}.article-guide tbody td:first-child{color:var(--ink);font-weight:650}.article-guide tbody tr:last-child td:first-child{border-bottom-left-radius:15px}.article-guide tbody tr:last-child td:last-child{border-bottom-right-radius:15px}.article-hero{width:min(1080px,100vw - 40px);margin:30px 50% 42px;transform:translate(-50%)}.article-hero img{width:100%;height:auto;box-shadow:var(--shadow);border-radius:22px;display:block}.guide-figure{width:min(960px,100vw - 40px);margin:30px 50% 38px;transform:translate(-50%)}.guide-figure picture,.guide-figure img{width:100%;height:auto;display:block}.guide-figure img{border:1px solid var(--line);background:#f7faf9;border-radius:18px}.diagram-zoom{cursor:zoom-in;display:block}.article-hero figcaption,.guide-figure figcaption{max-width:960px;color:var(--muted);margin:12px auto 0;font-size:.9rem;line-height:1.55}.article-sources{border-top:1px solid var(--line);margin-top:64px;padding-top:10px}.article-sources a{overflow-wrap:anywhere}.notice{border-left:4px solid var(--amber);background:#fff8ed;border-radius:8px;padding:18px 20px}.site-footer{color:#b9cbd3;background:#071c28;padding:60px 0 22px}.footer-grid{grid-template-columns:minmax(0,2fr) repeat(2,minmax(0,1fr));gap:32px 60px;display:grid}.brand-footer{color:#fff}.footer-grid p{max-width:460px}.footer-grid>div:not(:first-child){flex-direction:column;gap:10px;display:flex}.footer-grid strong{color:#fff;margin-bottom:5px}.footer-grid a{color:#b9cbd3;font-size:.9rem;text-decoration:none}.footer-grid a:not(.brand){text-underline-offset:4px;align-items:center;min-height:44px;text-decoration:underline;display:inline-flex}.footer-grid a:hover{color:#fff}.footer-bottom{border-top:1px solid #ffffff1a;margin-top:45px;padding-top:20px;font-size:.8rem}@media (width<=820px){.site-header nav{gap:0}.site-header nav a{align-items:center;min-height:44px;display:inline-flex}.cards{grid-template-columns:1fr}.section-head{flex-direction:column;align-items:start}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}}@media (width<=520px){.article-guide{font-size:1rem}.article-guide :is(th,td){padding:14px 12px}.article-guide table,.article-guide thead th{font-size:.9375rem}.shell{width:min(100% - 26px,1120px)}.hero-actions{flex-direction:column;align-items:stretch}.button{width:100%}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.site-footer{padding-top:40px}}.brand-footer>span>span{color:#69d5ba}.article-sources li,.prose sup a{scroll-margin-top:100px}.article-sources li:target{outline-offset:4px;background:#e4f5ef;outline:2px solid #11745f}.prose sup a{padding:2px}.cleaning-toc{border:1px solid var(--line);background:var(--white);border-radius:16px;margin:26px 0;padding:20px 24px;display:block}.cleaning-toc strong{font-size:1rem;display:block}.cleaning-toc ol{grid-template-columns:1fr 1fr;gap:8px 30px;margin:12px 0 0;padding-left:22px;display:grid}.cleaning-toc li,.cleaning-toc li+li{margin:0}.cleaning-toc a{color:#116750;text-underline-offset:3px;padding:4px 0;font-size:1rem;text-decoration:underline;display:inline-block}.article-guide :is(h2,h3){scroll-margin-top:100px}.cleaning-assistant{background:#eef7f3;border:1px solid #bedcd0;border-radius:18px;margin:28px 0;padding:24px}.cleaning-assistant [hidden]{display:none!important}.cleaning-assistant label{margin-bottom:12px;display:block}.cleaning-assistant select{width:100%;max-width:100%;min-height:48px;color:var(--ink);font:inherit;background:#fff;border:1px solid #547366;border-radius:8px;padding:10px;font-size:1rem;display:block}.cleaning-assistant select:focus-visible{outline-offset:3px;outline:3px solid #168f77}.cleaning-assistant .cleaning-status{margin:10px 0;font-size:.9rem}.cleaning-assistant button{min-height:44px;color:var(--ink);cursor:pointer;background:#fff;border:1px solid #547366;border-radius:8px;padding:7px 12px}.cleaning-program-case{border-top:1px solid #bedcd0;margin-top:20px;padding-top:16px}.cleaning-assistant .cleaning-program-case h3{margin:0 0 10px;font-size:1.15rem}.cleaning-program-case p{margin-bottom:0}@media (width<=520px){.cleaning-toc{padding:18px}.cleaning-toc ol{grid-template-columns:1fr;gap:5px}.cleaning-assistant{padding:18px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{.cleaning-assistant [data-program-controls]{display:none!important}.cleaning-assistant .cleaning-program-case[hidden]{display:block!important}}