:root{--navy:#0B2545;--navy2:#13315C;--navy3:#1d4a7e;--green:#1B7F5A;--green-d:#146347;--green-t:#E8F4EE;
--ink:#1c2633;--muted:#4f5b6b;--line:#e3e8ef;--tint:#F3F6FA;--white:#fff;--warn:#FFF7E6;
--r:12px;--shadow:0 1px 2px rgba(11,37,69,.06),0 6px 20px rgba(11,37,69,.06);
--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
--serif:Charter,"Bitstream Charter","Sitka Text",Cambria,Georgia,serif}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:84px}
body{margin:0;font:400 17px/1.65 var(--font);color:var(--ink);background:var(--white);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--green-d);text-underline-offset:2px}
a:hover{color:var(--navy)}
:focus-visible{outline:3px solid #2EA36F;outline-offset:2px;border-radius:4px}
h1,h2,h3{color:var(--navy);line-height:1.2;letter-spacing:-.01em}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--navy);color:#fff;padding:8px 14px;border-radius:6px;z-index:100}
.skip:focus{left:8px}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.wrap-narrow{max-width:720px;margin:0 auto;padding:0 20px}
.wrap-mid{max-width:900px;margin:0 auto;padding:0 20px}
svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}
/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:650;font-size:16px;line-height:1;padding:14px 20px;border-radius:999px;text-decoration:none;border:2px solid transparent;transition:background .15s,color .15s,border-color .15s}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:hover{background:var(--green-d);color:#fff}
.btn-ghost{color:#fff;border-color:rgba(255,255,255,.55)}
.btn-ghost:hover{background:#fff;color:var(--navy)}
.btn-outline{color:var(--navy);border-color:var(--navy)}
.btn-outline:hover{background:var(--navy);color:#fff}
.btn-sm{padding:9px 14px;font-size:14.5px}
.btn-yt{background:var(--navy);color:#fff}
.btn-yt:hover{background:var(--green);color:#fff}
/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:saturate(1.4) blur(8px)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--navy)}
.brand img{border-radius:8px}
.brand-name{font-weight:800;font-size:19px;letter-spacing:-.02em;white-space:nowrap}
.amp{color:var(--green)}
.site-nav{display:flex;align-items:center;gap:22px}
.site-nav ul{display:flex;gap:4px;list-style:none;margin:0;padding:0}
.site-nav ul a{display:block;padding:8px 12px;border-radius:8px;color:var(--ink);text-decoration:none;font-weight:550;font-size:15.5px}
.site-nav ul a:hover{background:var(--tint);color:var(--navy)}
.site-nav ul a[aria-current]{color:var(--green-d);box-shadow:inset 0 -2px 0 var(--green)}
.menu-btn{display:none;background:none;border:0;padding:10px;margin-right:-10px;cursor:pointer;border-radius:8px}
.bars,.bars::before,.bars::after{display:block;width:22px;height:2px;background:var(--navy);border-radius:2px;position:relative;transition:transform .2s}
.bars::before,.bars::after{content:"";position:absolute;left:0}
.bars::before{top:-7px}.bars::after{top:7px}
.menu-btn[aria-expanded=true] .bars{background:transparent}
.menu-btn[aria-expanded=true] .bars::before{transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded=true] .bars::after{transform:translateY(-7px) rotate(-45deg)}
@media (max-width:940px){
 .menu-btn{display:block}
 .site-nav{display:none;position:absolute;left:0;right:0;top:68px;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:12px;padding:12px 20px 20px;box-shadow:0 12px 24px rgba(11,37,69,.08)}
 .site-nav.open{display:flex}
 .site-nav ul{flex-direction:column}
 .site-nav ul a{padding:12px 8px;font-size:17px;border-bottom:1px solid var(--line);border-radius:0}
 .site-nav ul a[aria-current]{box-shadow:inset 3px 0 0 var(--green);padding-left:14px}
 .btn-yt{justify-content:center;padding:13px}
}
/* hero */
.hero{background:radial-gradient(1200px 500px at 85% -10%,rgba(27,127,90,.35),transparent 60%),linear-gradient(160deg,var(--navy) 0%,var(--navy2) 100%);color:#fff;padding:64px 0 72px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.kicker{font-size:13px;letter-spacing:.12em;text-transform:uppercase;font-weight:700;color:#8fd6b5;margin:0 0 14px}
.hero h1{color:#fff;font-size:clamp(34px,5vw,54px);line-height:1.08;margin:0 0 18px;letter-spacing:-.025em;font-weight:800}
.hero-sub{font-size:19px;line-height:1.6;color:#dbe4ef;margin:0 0 28px;max-width:600px}
.hero-ctas{display:flex;flex-wrap:wrap;gap:12px}
.hero-feature{display:block;background:#fff;border-radius:16px;overflow:hidden;text-decoration:none;box-shadow:0 20px 50px rgba(0,0,0,.35);transition:transform .2s}
.hero-feature:hover{transform:translateY(-3px)}
.hf-body{display:block;padding:16px 20px 20px}
.hf-label{display:block;font-size:12.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--green-d);margin-bottom:6px}
.hf-title{display:block;font-size:19px;font-weight:750;line-height:1.3;color:var(--navy)}
@media (max-width:860px){.hero{padding:44px 0 52px}.hero-grid{grid-template-columns:1fr;gap:36px}.hero-sub{font-size:17.5px}}
/* sections */
.section-h{font-size:clamp(24px,3vw,30px);margin:0 0 24px;font-weight:800}
.section-top{display:flex;align-items:baseline;justify-content:space-between;gap:16px}
.more{font-weight:650;text-decoration:none;color:var(--green-d);white-space:nowrap}
.more:hover{text-decoration:underline}
.trust{padding:56px 0;border-bottom:1px solid var(--line)}
.trust-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.trust-item{padding:4px 0}
.trust-ic{display:inline-flex;width:44px;height:44px;border-radius:12px;background:var(--green-t);color:var(--green-d);align-items:center;justify-content:center;margin-bottom:14px}
.trust-ic svg{width:22px;height:22px}
.trust-item h3{font-size:19px;margin:0 0 8px}
.trust-item p{margin:0;color:var(--muted);font-size:16px}
@media (max-width:760px){.trust-grid{grid-template-columns:1fr;gap:24px}}
.latest{padding:56px 0 64px;background:var(--tint)}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media (max-width:980px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.card-grid{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-2px);box-shadow:0 2px 4px rgba(11,37,69,.06),0 14px 32px rgba(11,37,69,.1)}
.card-img img{aspect-ratio:16/9;object-fit:cover;width:100%}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.eyebrow{display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:13px;color:var(--muted);margin:0 0 8px}
.cat{font-weight:700;color:var(--green-d);text-transform:uppercase;letter-spacing:.06em;font-size:12px}
.card-title{font-size:19px;line-height:1.3;margin:0 0 8px}
.card-title a{color:var(--navy);text-decoration:none}
.card-title a:hover{text-decoration:underline;text-decoration-color:var(--green)}
.card-text{font-size:15.5px;color:var(--muted);margin:0 0 14px;line-height:1.55}
.card-links{margin:auto 0 0;display:flex;gap:18px;flex-wrap:wrap;font-size:15px}
.card-video{display:inline-flex;gap:6px;align-items:center;color:var(--navy);text-decoration:none;font-weight:600}
.card-video svg{color:#c4302b}
.tri{fill:#fff}.btn .tri{fill:var(--navy)}.btn-primary .tri{fill:var(--green)}.btn-yt:hover .tri{fill:var(--green)}.btn-primary:hover .tri{fill:var(--green-d)}
.data-list{list-style:none;padding:6px 18px!important;background:var(--tint);border:1px solid var(--line);border-radius:10px;font-variant-numeric:tabular-nums}
.data-list li{margin:0!important;padding:10px 0;border-bottom:1px solid var(--line);font-size:.95em}
.data-list li:last-child{border-bottom:0}
.card-video:hover{text-decoration:underline}
.subscribe{background:var(--navy);color:#fff;padding:52px 0}
.sub-inner{display:flex;align-items:center;justify-content:space-between;gap:36px}
.subscribe h2{color:#fff;font-size:clamp(24px,3vw,30px);margin:0 0 10px}
.subscribe p{margin:0;color:#d5deea;max-width:640px}
.sub-ctas{flex:none;text-align:center}
.sub-social{margin-top:12px!important;font-size:15px}
.sub-social a{color:#fff}
@media (max-width:760px){.sub-inner{flex-direction:column;align-items:flex-start}.sub-ctas{text-align:left}}
.home-disc,.small-note{font-size:14px;color:var(--muted);margin:28px 0;line-height:1.6}
/* page head */
.page-head{background:var(--tint);border-bottom:1px solid var(--line);padding:34px 0 36px}
.page-head h1{font-size:clamp(30px,4vw,44px);margin:6px 0 12px;font-weight:800;letter-spacing:-.02em}
.page-head-plain{background:#fff;border:0;padding-bottom:8px}
.lede{font-size:19px;color:var(--muted);max-width:720px;margin:0}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px;font-size:14px;color:var(--muted)}
.crumbs li+li::before{content:"›";margin-right:6px;color:#9aa6b5}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--green-d);text-decoration:underline}
.cat-toc{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0 0}
.cat-toc a{background:#fff;border:1px solid var(--line);padding:7px 14px;border-radius:999px;text-decoration:none;font-size:14.5px;font-weight:600;color:var(--navy)}
.cat-toc a:hover{border-color:var(--green);color:var(--green-d)}
.research-list{padding:24px 20px 20px}
.cat-sec{padding:20px 0 8px}
.cat-h{font-size:24px;margin:12px 0 18px;padding-bottom:10px;border-bottom:2px solid var(--navy)}
.row-card{display:grid;grid-template-columns:300px 1fr;gap:26px;padding:0 0 26px;margin-bottom:26px;border-bottom:1px solid var(--line);align-items:start}
.row-card:last-child{border-bottom:0}
.row-img img{border-radius:10px;aspect-ratio:16/9;object-fit:cover}
.row-card .card-title{font-size:21px}
@media (max-width:700px){.row-card{grid-template-columns:1fr;gap:14px}}
/* article */
.article{padding:28px 0 8px}
.art-head{margin-bottom:24px}
.art-cat{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--green-d);margin:18px 0 10px}
.art-head h1,.nf h1{font-size:clamp(30px,4.4vw,44px);line-height:1.12;margin:0 0 16px;font-weight:800;letter-spacing:-.022em}
.byline{font-size:15px;color:var(--muted);margin:0;padding-top:12px;border-top:1px solid var(--line)}
.page-head-plain .byline{border:0;padding-top:0}
.byline a{color:var(--navy);font-weight:650;text-decoration:none}
.art-hero{margin:0 auto 34px}
.art-hero img{border-radius:14px;width:100%}
.prose{font-size:18.5px;line-height:1.72}
.prose p{margin:0 0 1.15em}
.prose h2{font-size:clamp(23px,2.6vw,27px);margin:1.9em 0 .6em;font-weight:780}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.3em}
.prose li{margin:0 0 .55em}
.prose li::marker{color:var(--green);font-weight:700}
.prose a{word-break:break-word}
.prose strong{color:var(--navy)}
.steps{counter-reset:s;list-style:none;padding-left:0!important}
.steps li{counter-increment:s;position:relative;padding-left:46px;min-height:32px}
.steps li::before{content:counter(s);position:absolute;left:0;top:1px;width:30px;height:30px;border-radius:50%;background:var(--navy);color:#fff;font-size:15px;font-weight:700;display:flex;align-items:center;justify-content:center;line-height:1}
.takeaways{background:var(--tint);border:1px solid #d9e2ee;border-left:5px solid var(--green);border-radius:var(--r);padding:22px 26px 10px;margin:0 0 2em}
.takeaways h2{font-size:15px!important;text-transform:uppercase;letter-spacing:.09em;margin:0 0 12px!important;color:var(--green-d)}
.takeaways ul{padding-left:1.1em}
.takeaways li{font-size:17px;line-height:1.6}
.note{display:flex;gap:14px;border-radius:var(--r);padding:20px 22px;margin:2em 0}
.note h2{font-size:19px!important;margin:0 0 6px!important}
.note p{margin:0;font-size:16.5px;line-height:1.6}
.note-ic{flex:none;width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center}
.note-compare{background:var(--green-t);border:1px solid #c7e5d6}
.note-compare .note-ic{background:var(--green);color:#fff}
.note-disc{background:var(--warn);border:1px solid #f1dfb8}
.note-disc .note-ic{background:#fff;color:#8a5a00;border:1px solid #f1dfb8}
.note-disc p{font-size:15.5px;color:#3d3420}
.note-disc strong{color:#3d3420}
.video{margin:0 0 1.6em}
.video-frame{position:relative;aspect-ratio:16/9;background:#000;border-radius:12px;overflow:hidden}
.video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video figcaption{font-size:15px;color:var(--muted);margin-top:10px}
.sources{font-size:15.5px;line-height:1.55}
.sources li{margin-bottom:.7em}
.related{background:var(--tint);padding:52px 0 60px;margin-top:40px}
.link-list{list-style:none;padding:0!important}
.link-list .lbl{display:inline-block;min-width:92px;font-weight:700;color:var(--navy)}
.page-prose{padding-bottom:48px}
.contact-cta{margin:8px 0 8px}
.prose .btn-primary{color:#fff;text-decoration:none;word-break:normal}
.nf{padding:64px 0 80px}
/* footer */
.site-footer{background:#081b33;color:#c9d4e2;padding:52px 0 26px;font-size:15px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1.2fr 1fr .8fr;gap:32px}
.brand-inv{color:#fff}
.brand-inv img{border-radius:8px}
.foot-brand p{margin:12px 0 0;color:#aebcd0}
.foot-h{font-size:13px;color:#fff;text-transform:uppercase;letter-spacing:.1em;margin:4px 0 12px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:0 0 8px}
.site-footer a{color:#dce5f0;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:20px}
.foot-bottom p{margin:0 0 6px}
.foot-disc{font-size:13.5px;color:#9fb0c6}
@media (max-width:860px){.foot-grid{grid-template-columns:1fr 1fr}.foot-brand{grid-column:1/-1}}
@media (max-width:480px){.takeaways{padding:18px 18px 8px}.note{padding:16px}.note-ic{width:32px;height:32px}.foot-grid{grid-template-columns:1fr}.prose{font-size:17.5px}.btn{font-size:15.5px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
@media print{.site-header,.site-footer,.related,.video{display:none}}