:root{--r69-navy:#071a33;--r69-navy2:#0d315a;--r69-blue:#1472bd;--r69-blue2:#2d91d7;--r69-green:#4fd35a;--r69-green2:#238636;--r69-ink:#14263b;--r69-muted:#60778c;--r69-line:#d5e2eb;--r69-soft:#f4f8fb;--r69-paper:#fbfdfe;--r69-warm:#fff9ed;--r69-orange:#f2a43c;--r69-shadow:0 24px 70px rgba(7,26,51,.09);--r69-max:min(1240px,calc(100% - 36px))}
*{box-sizing:border-box}.ratio69-page{margin:0;color:var(--r69-ink);background:#fff;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;-webkit-font-smoothing:antialiased;line-height:1.55}.ratio69-page a{text-decoration:none;color:inherit}.ratio69-page button,.ratio69-page input,.ratio69-page select{font:inherit}.ratio69-page img,.ratio69-page svg{display:block;max-width:100%}.ratio69-page h1,.ratio69-page h2,.ratio69-page h3,.ratio69-page p{margin:0}.ratio69-page h1,.ratio69-page h2,.ratio69-page h3{color:var(--r69-navy);letter-spacing:-.045em}.ratio69-page .container{width:var(--r69-max);margin:auto}.ratio69-page :focus-visible{outline:3px solid var(--r69-blue2);outline-offset:3px;border-radius:8px}.ratio69-skip{position:fixed;left:12px;top:-60px;z-index:500;background:#fff;color:var(--r69-navy);padding:10px 14px;border-radius:10px;box-shadow:var(--r69-shadow)}.ratio69-skip:focus{top:12px}
.ratio69-page .site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);backdrop-filter:blur(12px);border-bottom:1px solid var(--r69-line)}.ratio69-page .header-inner{min-height:76px;display:flex;align-items:center;gap:20px}.ratio69-page .brand{display:flex;align-items:center;min-width:max-content}.ratio69-page .brand img{width:224px;height:auto}.ratio69-page .nav{margin-left:auto;display:flex;align-items:center;gap:20px}.ratio69-page .nav a{font-weight:750;font-size:.91rem;color:#334c64}.ratio69-page .nav a:hover{color:var(--r69-blue)}.ratio69-page .nav-all{color:var(--r69-blue)!important}.ratio69-page .header-cta{margin-left:8px;border:1px solid var(--r69-navy);background:var(--r69-navy);color:#fff!important;border-radius:13px;padding:11px 15px;font-weight:850}.ratio69-page .menu-btn{display:none;margin-left:auto;width:46px;height:44px;border:1px solid var(--r69-line);background:#fff;border-radius:12px;padding:10px}.ratio69-page .menu-btn span{display:block;height:2px;background:var(--r69-navy);margin:4px}.ratio69-page .mobile-nav{display:none}
.ratio69-kicker,.ratio69-micro{display:inline-flex;align-items:center;gap:9px;color:#176d26;font-size:.72rem;font-weight:950;letter-spacing:.12em;text-transform:uppercase}.ratio69-kicker:before,.ratio69-micro:before{content:"";width:22px;height:2px;background:var(--r69-green)}
.ratio69-hero{position:relative;overflow:hidden;background:linear-gradient(145deg,#fff 0%,#f7fbfd 58%,#edf5f9 100%);border-bottom:1px solid var(--r69-line)}.ratio69-grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(18,101,173,.038) 1px,transparent 1px),linear-gradient(90deg,rgba(18,101,173,.038) 1px,transparent 1px);background-size:58px 58px;mask-image:linear-gradient(90deg,rgba(0,0,0,.22),transparent 70%);pointer-events:none}.ratio69-hero:after{content:"A:B = C:X";position:absolute;left:-28px;bottom:-48px;color:rgba(7,26,51,.028);font-size:8rem;font-weight:1000;letter-spacing:-.08em;pointer-events:none}.ratio69-hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.04fr) minmax(440px,.96fr);gap:64px;align-items:center;min-height:650px;padding:58px 0 66px}.ratio69-breadcrumb{display:flex;align-items:center;gap:8px;color:#61788c;font-size:.82rem;margin-bottom:30px}.ratio69-breadcrumb a:hover{color:var(--r69-blue)}.ratio69-hero-copy{position:relative;padding-left:22px}.ratio69-hero-copy:before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:4px;background:linear-gradient(var(--r69-green),var(--r69-blue2))}.ratio69-hero-copy h1{max-width:720px;margin:14px 0 20px;font-size:5.4rem;font-size:clamp(3.8rem,5.6vw,5.8rem);line-height:.91}.ratio69-hero-copy h1 span{color:var(--r69-blue)}.ratio69-lead{max-width:700px;color:#49657c;font-size:1.17rem;line-height:1.75}.ratio69-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.ratio69-btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;border-radius:14px;padding:0 19px;font-weight:900}.ratio69-btn--main{background:var(--r69-navy);color:#fff!important;box-shadow:0 12px 30px rgba(7,26,51,.14)}.ratio69-btn--main:hover{background:var(--r69-navy2)}.ratio69-btn--ghost{border:1px solid #c6d5e1;background:#fff;color:var(--r69-navy)}.ratio69-trust{display:flex;flex-wrap:wrap;gap:10px 16px;margin-top:23px}.ratio69-trust span{display:inline-flex;align-items:center;gap:8px;font-size:.79rem;color:#4c657b;font-weight:800}.ratio69-trust span:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--r69-green);box-shadow:0 0 0 5px rgba(79,211,90,.12)}
.ratio69-bridge{position:relative;border-radius:30px;padding:22px;background:linear-gradient(150deg,#06182f,#0a294b 63%,#0d3a66);box-shadow:0 35px 80px rgba(7,26,51,.22);color:#fff;overflow:hidden}.ratio69-bridge:before{content:"";position:absolute;width:280px;height:280px;border-radius:50%;right:-120px;top:-130px;background:radial-gradient(circle,rgba(79,211,90,.18),transparent 67%)}.ratio69-bridge-head{display:flex;align-items:center;justify-content:space-between;gap:16px;position:relative;z-index:2}.ratio69-bridge-head span{color:#82d88a;font-size:.67rem;font-weight:950;letter-spacing:.13em}.ratio69-bridge-head b{color:#b5cad8;font-size:.64rem;border:1px solid rgba(255,255,255,.13);padding:6px 9px;border-radius:999px}.ratio69-bridge-stage{display:grid;grid-template-columns:1fr 108px 1fr;gap:15px;align-items:center;min-height:330px;position:relative;z-index:2}.ratio69-pair{display:grid;gap:12px}.ratio69-pair small{color:#8fa9bc;font-size:.64rem;font-weight:900;letter-spacing:.08em}.ratio69-pair strong{display:flex;justify-content:space-between;align-items:baseline;gap:8px;padding:16px;border-radius:18px;background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.12);font-size:1.7rem;color:#fff}.ratio69-pair strong em{font-style:normal;font-size:.68rem;color:#a9bdcb}.ratio69-pair i{height:3px;border-radius:99px;background:linear-gradient(90deg,var(--r69-green),var(--r69-blue2));position:relative}.ratio69-pair i:after{content:"›";position:absolute;right:-1px;top:-15px;color:#8bdc91;font-size:1.5rem}.ratio69-pair.is-right i{background:linear-gradient(90deg,var(--r69-blue2),var(--r69-green))}.ratio69-core{text-align:center}.ratio69-core span{display:block;color:#fff;font-weight:950;font-size:1.12rem}.ratio69-core b{display:grid;place-items:center;width:52px;height:52px;border-radius:50%;margin:12px auto;background:#fff;color:var(--r69-navy);font-size:1.5rem;box-shadow:0 12px 28px rgba(0,0,0,.22)}.ratio69-core small{display:block;color:#82d88a;font-size:.58rem;font-weight:950;letter-spacing:.08em}.ratio69-bridge-foot{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px;border-top:1px solid rgba(255,255,255,.12);padding-top:17px;position:relative;z-index:2}.ratio69-bridge-foot span{color:#91aabc;font-size:.72rem}.ratio69-bridge-foot span:last-child{text-align:right}.ratio69-bridge-foot b{color:#fff;font-size:.88rem}
.ratio69-section-head{display:grid;grid-template-columns:1.12fr .88fr;gap:60px;align-items:end;margin-bottom:28px}.ratio69-section-head h2{font-size:3.75rem;font-size:clamp(2.55rem,4.2vw,4.15rem);line-height:.95;margin-top:9px}.ratio69-section-head>p{color:#526579;line-height:1.7;max-width:520px}
.ratio69-calc{padding:84px 0;background:#fff}.ratio69-workbench{border:1px solid var(--r69-line);border-radius:28px;padding:24px;background:linear-gradient(180deg,#fff,#fbfdfe);box-shadow:var(--r69-shadow)}.ratio69-error{margin-bottom:15px;padding:12px 14px;border-radius:13px;background:#fff2f2;border:1px solid #efcaca;color:#8a3636;font-size:.79rem;font-weight:800}.ratio69-presets{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-bottom:18px;border-bottom:1px solid var(--r69-line)}.ratio69-presets>span{font-size:.65rem;color:#176d26;font-weight:950;letter-spacing:.1em}.ratio69-presets>div{display:flex;gap:7px;flex-wrap:wrap}.ratio69-presets button{border:1px solid #d4e0e8;background:#fff;color:#405a70;border-radius:999px;min-height:36px;padding:0 12px;font-weight:850;font-size:.74rem;cursor:pointer}.ratio69-presets button.is-active{background:var(--r69-navy);border-color:var(--r69-navy);color:#fff}.ratio69-relation{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}.ratio69-relation button{display:grid;grid-template-columns:68px 1fr;align-items:center;text-align:left;gap:13px;border:1px solid var(--r69-line);background:#fff;border-radius:19px;padding:15px;cursor:pointer;color:var(--r69-ink)}.ratio69-relation button>span{display:grid;place-items:center;width:60px;height:60px;border-radius:17px;background:#eff6fb;color:var(--r69-blue);font-size:1.4rem;font-weight:1000}.ratio69-relation button b,.ratio69-relation button small,.ratio69-relation button em{display:block}.ratio69-relation button b{color:var(--r69-navy)}.ratio69-relation button small{color:#526579;font-size:.72rem;margin-top:3px}.ratio69-relation button em{font-style:normal;color:var(--r69-blue);font-size:.65rem;font-weight:950;margin-top:6px;letter-spacing:.06em}.ratio69-relation button.is-active{border-color:#a9cce6;background:#f5faff;box-shadow:0 0 0 4px rgba(43,145,215,.06)}.ratio69-relation button.is-active>span{background:var(--r69-navy);color:#fff}.ratio69-matrix-wrap{margin-top:18px;border-radius:22px;border:1px solid var(--r69-line);background:var(--r69-soft);padding:18px}.ratio69-matrix-head{display:grid;grid-template-columns:1fr 46px 1fr;gap:10px;align-items:center;padding:0 8px 12px}.ratio69-matrix-head>div{display:flex;justify-content:space-between;align-items:center;gap:12px}.ratio69-matrix-head span{font-size:.7rem;color:var(--r69-navy);font-weight:950;letter-spacing:.06em}.ratio69-matrix-head small{font-size:.67rem;color:#526579}.ratio69-matrix-head i{height:1px;background:var(--r69-line)}.ratio69-matrix{display:grid;grid-template-columns:1fr 64px 1fr;gap:10px;align-items:stretch}.ratio69-cell{display:block;padding:14px;border-radius:17px;background:#fff;border:1px solid var(--r69-line)}.ratio69-cell>span{display:block;color:#526579;font-size:.64rem;font-weight:850;margin-bottom:7px}.ratio69-cell>div{display:flex;align-items:center;min-height:58px;border:1px solid #cad9e4;border-radius:13px;background:#fff;overflow:hidden}.ratio69-cell input{width:100%;min-width:0;min-height:56px;border:0;outline:0;background:transparent;padding:0 13px;color:var(--r69-navy);font-size:1.2rem;font-weight:900}.ratio69-cell b{white-space:nowrap;border-left:1px solid #e0e8ee;padding:0 12px;color:#62798d;font-size:.73rem}.ratio69-cell>small{display:block;min-height:16px;color:#a33d3d;font-size:.64rem;margin-top:4px}.ratio69-cell.is-new{border-color:#c8deec}.ratio69-cell.is-answer{background:linear-gradient(145deg,#071a33,#0d3b67);border-color:#071a33}.ratio69-cell.is-answer>span{color:#91b7d1}.ratio69-cell.is-answer>div{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.14)}.ratio69-cell.is-answer input{color:#fff}.ratio69-cell.is-answer b{border-left-color:rgba(255,255,255,.13);color:#b8ccda}.ratio69-link{display:grid;place-items:center;align-content:center;gap:7px;color:#526579;font-size:.63rem}.ratio69-link i{width:36px;height:2px;background:linear-gradient(90deg,var(--r69-green),var(--r69-blue2));position:relative}.ratio69-link i:after{content:"›";position:absolute;right:-1px;top:-11px;color:var(--r69-blue);font-size:1.15rem}.ratio69-question{margin-top:13px;padding:13px 15px;border-radius:13px;background:#fff;color:#486177;font-size:.78rem;border:1px dashed #cbdbe6}.ratio69-advanced{margin-top:16px;border:1px solid var(--r69-line);border-radius:17px;background:#fff;overflow:hidden}.ratio69-advanced summary{cursor:pointer;list-style:none;padding:14px 16px;display:flex;justify-content:space-between;gap:15px;align-items:center}.ratio69-advanced summary::-webkit-details-marker{display:none}.ratio69-advanced summary span{font-weight:900;color:var(--r69-navy)}.ratio69-advanced summary small{color:#526579;font-size:.69rem}.ratio69-advanced summary:after{content:"+";font-size:1.2rem;color:var(--r69-blue)}.ratio69-advanced[open] summary:after{content:"−"}.ratio69-advanced-body{padding:16px;border-top:1px solid var(--r69-line)}.ratio69-advanced fieldset{margin:0;border:0;padding:0}.ratio69-advanced legend{font-size:.72rem;font-weight:900;color:var(--r69-navy);margin-bottom:8px}.ratio69-unknowns{display:flex;gap:7px}.ratio69-unknowns label{cursor:pointer}.ratio69-unknowns input{position:absolute;opacity:0;pointer-events:none}.ratio69-unknowns span{display:grid;place-items:center;width:44px;height:40px;border-radius:11px;border:1px solid #cedce6;background:#fff;color:#536c80;font-weight:900}.ratio69-unknowns input:checked+span{background:var(--r69-navy);border-color:var(--r69-navy);color:#fff}.ratio69-advanced-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:15px}.ratio69-advanced-grid label>span{display:block;font-size:.66rem;color:#536c80;font-weight:850;margin-bottom:5px}.ratio69-advanced-grid input,.ratio69-advanced-grid select{width:100%;min-height:45px;border:1px solid #ccdbe5;border-radius:11px;background:#fff;color:var(--r69-navy);padding:0 10px;font-weight:800}.ratio69-result{display:grid;grid-template-columns:1.05fr 1.2fr .95fr;gap:0;margin-top:18px;border-radius:22px;overflow:hidden;background:var(--r69-navy);color:#fff}.ratio69-result-main,.ratio69-proof,.ratio69-result-side{padding:22px}.ratio69-result-main{background:linear-gradient(145deg,#071a33,#0d3e6d)}.ratio69-result-main>span,.ratio69-proof span,.ratio69-result-side>span{display:block;color:#85d88c;font-size:.64rem;font-weight:950;letter-spacing:.1em}.ratio69-result-main>strong{display:block;margin:12px 0 9px;line-height:.9}.ratio69-result-main>strong b{font-size:3.7rem;letter-spacing:-.07em}.ratio69-result-main>strong small{font-size:1rem;color:#a9c0d0}.ratio69-result-main p{color:#c6d6e1;font-size:.76rem;line-height:1.6}.ratio69-proof{display:grid;grid-template-columns:1fr 1px 1fr;gap:17px;align-items:center;background:#0b2949}.ratio69-proof>i{width:1px;height:100%;background:rgba(255,255,255,.1)}.ratio69-proof code{display:block;color:#fff;font-size:1rem;font-weight:900;margin:7px 0 4px;white-space:normal}.ratio69-proof small{color:#93adbf;font-size:.68rem}.ratio69-result-side{background:#102f50}.ratio69-result-side strong{display:block;color:#fff;font-size:1.05rem;margin:8px 0}.ratio69-result-side p{color:#adc1cf;font-size:.72rem;line-height:1.55}.ratio69-alt{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-top:14px;padding:11px 12px;border-radius:12px;background:rgba(255,255,255,.06)}.ratio69-alt span{font-size:.65rem;color:#9eb4c4}.ratio69-alt b{color:#fff}.ratio69-result-side button{width:100%;margin-top:10px;min-height:42px;border:1px solid rgba(255,255,255,.16);border-radius:11px;background:#fff;color:var(--r69-navy);font-weight:900;cursor:pointer}.ratio69-form-actions{display:flex;gap:10px;margin-top:16px}.ratio69-form-actions button{min-height:46px;border-radius:12px;padding:0 15px;font-weight:900;cursor:pointer}.ratio69-submit{border:1px solid var(--r69-navy);background:var(--r69-navy);color:#fff}.ratio69-form-actions button:last-child{border:1px solid #cedbe5;background:#fff;color:var(--r69-navy)}.ratio69-privacy{margin-top:12px;color:#6c8294;font-size:.67rem}
.ratio69-choice{padding:86px 0;background:#071a33;color:#fff}.ratio69-choice .ratio69-section-head h2{color:#fff}.ratio69-choice .ratio69-section-head>p{color:#a6bdcd}.ratio69-choice-map{display:grid;grid-template-columns:1fr 180px 1fr;gap:16px;align-items:stretch}.ratio69-choice-map article{border-radius:24px;padding:22px;background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.11)}.ratio69-choice-map article>span{font-size:.64rem;color:#82d98a;font-weight:950;letter-spacing:.09em}.ratio69-arrow{font-size:4rem;line-height:1;color:#fff;margin:24px 0 18px}.ratio69-choice-map article strong{display:block;color:#fff;font-size:1.5rem}.ratio69-choice-map article p{color:#a9becc;font-size:.78rem;line-height:1.6;margin:8px 0 20px}.ratio69-choice-map article b{display:inline-flex;padding:7px 10px;border-radius:999px;background:#fff;color:var(--r69-navy);font-size:.66rem}.ratio69-choice-core{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:20px}.ratio69-choice-core span{color:#85d88c;font-size:.62rem;font-weight:950;letter-spacing:.09em}.ratio69-choice-core strong{font-size:2rem;color:#fff;margin:8px 0}.ratio69-choice-core i{width:1px;height:75px;background:linear-gradient(var(--r69-green),var(--r69-blue2));margin:4px 0 10px}.ratio69-choice-core small{color:#91aabd;line-height:1.5}
.ratio69-mirror{padding:86px 0;background:var(--r69-soft)}.ratio69-mirror-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px}.ratio69-mirror-grid article{padding:24px;border-radius:22px;background:#fff;border:1px solid var(--r69-line);box-shadow:0 16px 40px rgba(7,26,51,.05)}.ratio69-mirror-grid article>span{font-size:.65rem;color:#176d26;font-weight:950;letter-spacing:.08em}.ratio69-mirror-grid article>strong{display:block;color:var(--r69-navy);font-size:1.8rem;margin:12px 0 18px}.ratio69-mirror-grid article>div{display:grid;grid-template-columns:1fr 40px 1fr;align-items:center}.ratio69-mirror-grid article>div b{padding:13px;border-radius:13px;background:#eef5fa;color:var(--r69-navy);text-align:center}.ratio69-mirror-grid article>div i{text-align:center;color:var(--r69-blue);font-style:normal;font-weight:1000}.ratio69-mirror-grid p{color:#526579;font-size:.77rem;margin-top:14px}
.ratio69-guard{padding:86px 0}.ratio69-guard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:11px}.ratio69-guard-grid article{position:relative;min-height:210px;padding:20px;border-radius:20px;border:1px solid #eadfc9;background:linear-gradient(180deg,#fffdf8,#fff9ef)}.ratio69-guard-grid span{position:absolute;right:15px;top:9px;color:rgba(7,26,51,.06);font-size:2.8rem;font-weight:1000}.ratio69-guard-grid b{display:block;color:#7b5823;font-size:1rem;margin-top:42px}.ratio69-guard-grid p{color:#77674f;font-size:.76rem;line-height:1.6;margin-top:7px}
.ratio69-method{padding:86px 0;background:var(--r69-soft);border-top:1px solid var(--r69-line)}.ratio69-method-flow{display:grid;grid-template-columns:1fr 34px 1fr 34px 1fr 34px 1fr;align-items:center}.ratio69-method-flow article{display:grid;grid-template-columns:44px 1fr;gap:12px;min-height:142px;padding:18px;border:1px solid var(--r69-line);border-radius:18px;background:#fff}.ratio69-method-flow article>span{display:grid;place-items:center;width:40px;height:40px;border-radius:13px;background:var(--r69-navy);color:#fff;font-size:.69rem;font-weight:950}.ratio69-method-flow article.is-total>span{background:var(--r69-green2)}.ratio69-method-flow b{color:var(--r69-navy)}.ratio69-method-flow p{color:#526579;font-size:.75rem;line-height:1.55;margin-top:5px}.ratio69-method-flow>i{height:1px;background:linear-gradient(90deg,var(--r69-green),var(--r69-blue2));position:relative}.ratio69-method-flow>i:after{content:"›";position:absolute;right:-1px;top:-13px;color:var(--r69-blue);font-size:1.5rem}.ratio69-method-note{display:flex;justify-content:space-between;gap:20px;margin-top:15px;padding:15px 17px;border-radius:15px;background:#eaf4ed;border:1px solid #d1e6d5}.ratio69-method-note span{color:#2d7138;font-size:.69rem;font-weight:950}.ratio69-method-note strong{color:#4f6954;font-size:.71rem;text-align:right;max-width:760px}
.ratio69-related{padding:82px 0;background:#fff}.ratio69-related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.ratio69-related-grid a{display:flex;flex-direction:column;min-height:165px;padding:18px;border-radius:19px;border:1px solid var(--r69-line);background:#fff;transition:.18s ease}.ratio69-related-grid a:hover{transform:translateY(-2px);box-shadow:0 14px 35px rgba(7,26,51,.08)}.ratio69-related-grid span{font-size:.65rem;color:#176d26;font-weight:950;letter-spacing:.08em}.ratio69-related-grid strong{color:var(--r69-navy);font-size:1rem;margin:7px 0}.ratio69-related-grid small{color:#526579;margin-top:auto}
.ratio69-footer{background:#06172c;color:#d3e2ed;padding:58px 0 24px}.ratio69-footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:44px}.ratio69-footer-brand>a img{width:235px}.ratio69-footer-brand>p{max-width:360px;color:#91a9ba;font-size:.83rem;margin-top:15px;line-height:1.65}.ratio69-socials{display:flex;gap:8px;margin-top:17px}.ratio69-social{display:grid;place-items:center;width:42px;height:42px;border:1px solid rgba(255,255,255,.14);border-radius:12px}.ratio69-social:hover{background:rgba(255,255,255,.07)}.ratio69-social svg{width:18px;height:18px;fill:none;stroke:#dceaf2;stroke-width:1.6}.ratio69-social:first-child svg{fill:#dceaf2;stroke:none}.ratio69-footer-col h3{color:#fff;font-size:.9rem;letter-spacing:0;margin-bottom:12px}.ratio69-footer-col a{display:block;color:#9fb4c4;font-size:.79rem;padding:4px 0}.ratio69-footer-col a:hover{color:#fff}.ratio69-signature{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:20px;font-size:.63rem;color:#86c98d;text-transform:uppercase;letter-spacing:.08em;font-weight:950}.ratio69-signature i{width:22px;height:1px;background:linear-gradient(90deg,rgba(79,211,90,.55),rgba(45,145,215,.4))}.ratio69-footer-bottom{margin-top:35px;padding-top:18px;border-top:1px solid rgba(255,255,255,.09);color:#7f98aa;font-size:.69rem}
@media(max-width:1100px){.ratio69-hero-grid{grid-template-columns:1fr 430px;gap:34px}.ratio69-hero-copy h1{font-size:4.15rem}.ratio69-advanced-grid{grid-template-columns:1fr 1fr 1fr}.ratio69-result{grid-template-columns:1fr 1fr}.ratio69-result-side{grid-column:1/-1}.ratio69-guard-grid,.ratio69-related-grid{grid-template-columns:1fr 1fr}.ratio69-method-flow{grid-template-columns:1fr}.ratio69-method-flow>i{width:1px;height:22px;justify-self:center}.ratio69-method-flow>i:after{content:"↓";right:-7px;top:2px}.ratio69-footer-grid{grid-template-columns:1.2fr 1fr 1fr}.ratio69-footer-col:last-child{display:none}}
@media(max-width:880px){.ratio69-page .nav,.ratio69-page .header-cta{display:none}.ratio69-page .menu-btn{display:block}.ratio69-page .mobile-nav{display:none;position:absolute;top:76px;left:0;right:0;background:#fff;border-bottom:1px solid var(--r69-line);padding:14px 18px;box-shadow:0 18px 30px rgba(7,26,51,.1)}.ratio69-page .mobile-nav.is-open{display:grid}.ratio69-page .mobile-nav a{padding:10px 4px;border-bottom:1px solid #edf1f4;font-weight:800}.ratio69-hero-grid{grid-template-columns:1fr;min-height:0;padding:42px 0 54px}.ratio69-bridge{max-width:620px}.ratio69-section-head{grid-template-columns:1fr;gap:15px}.ratio69-choice-map{grid-template-columns:1fr}.ratio69-choice-core{min-height:150px}.ratio69-choice-core i{height:36px}.ratio69-mirror-grid{grid-template-columns:1fr}.ratio69-footer-grid{grid-template-columns:1fr 1fr}.ratio69-footer-brand{grid-column:1/-1}.ratio69-footer-col:last-child{display:block}}
@media(max-width:640px){:root{--r69-max:min(100% - 24px,1240px)}.ratio69-page .header-inner{min-height:68px}.ratio69-page .brand img{width:196px}.ratio69-page .mobile-nav{top:68px}.ratio69-hero-grid{padding:28px 0 38px}.ratio69-breadcrumb{margin-bottom:22px;font-size:.74rem;flex-wrap:wrap}.ratio69-hero-copy{padding-left:16px}.ratio69-hero-copy h1{font-size:3.2rem;font-size:clamp(2.72rem,13vw,4rem);line-height:.93}.ratio69-lead{font-size:1rem}.ratio69-actions{display:grid;grid-template-columns:1fr}.ratio69-bridge{padding:17px;border-radius:22px}.ratio69-bridge-stage{grid-template-columns:1fr;min-height:0;padding:22px 0}.ratio69-core{display:grid;grid-template-columns:1fr 42px 1fr;align-items:center}.ratio69-core span{font-size:.85rem}.ratio69-core b{width:42px;height:42px;margin:0 auto}.ratio69-core small{font-size:.52rem}.ratio69-pair strong{font-size:1.35rem}.ratio69-bridge-foot{grid-template-columns:1fr;gap:5px}.ratio69-bridge-foot span:last-child{text-align:left}.ratio69-calc,.ratio69-choice,.ratio69-mirror,.ratio69-guard,.ratio69-method,.ratio69-related{padding:58px 0}.ratio69-section-head h2{font-size:2.5rem}.ratio69-workbench{padding:15px;border-radius:22px}.ratio69-presets{align-items:flex-start;flex-direction:column}.ratio69-relation{grid-template-columns:1fr}.ratio69-matrix-head{grid-template-columns:1fr 20px 1fr}.ratio69-matrix{grid-template-columns:1fr}.ratio69-link{display:flex;min-height:30px}.ratio69-link i{width:2px;height:24px;background:linear-gradient(var(--r69-green),var(--r69-blue2))}.ratio69-link i:after{content:"↓";right:-7px;top:4px;font-size:.9rem}.ratio69-advanced summary{align-items:flex-start;flex-direction:column;padding-right:44px;position:relative}.ratio69-advanced summary:after{position:absolute;right:15px;top:13px}.ratio69-advanced-grid{grid-template-columns:1fr}.ratio69-result{grid-template-columns:1fr}.ratio69-proof{grid-template-columns:1fr}.ratio69-proof>i{height:1px;width:100%}.ratio69-result-side{grid-column:auto}.ratio69-form-actions{display:grid}.ratio69-mirror-grid article>strong{font-size:1.45rem}.ratio69-mirror-grid article>div{grid-template-columns:1fr}.ratio69-mirror-grid article>div i{padding:5px}.ratio69-guard-grid,.ratio69-related-grid{grid-template-columns:1fr}.ratio69-method-note{flex-direction:column}.ratio69-method-note strong{text-align:left}.ratio69-footer-grid{grid-template-columns:1fr}.ratio69-footer-brand{grid-column:auto}.ratio69-signature{gap:6px;font-size:.56rem}}
@media(max-width:360px){.ratio69-hero-copy h1{font-size:2.5rem}.ratio69-section-head h2{font-size:2.25rem}.ratio69-workbench{padding:13px}.ratio69-result-main>strong b{font-size:3.1rem}.ratio69-relation button{grid-template-columns:54px 1fr}.ratio69-relation button>span{width:50px;height:50px}}
@media(prefers-reduced-motion:reduce){.ratio69-page *{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

/* Release QA: text colors follow the section surface. */
.ratio69-choice .ratio69-micro{color:#8ed597}