.isg-introduction{--intro-navy:#163b5c;--intro-orange:#f36a2e;--intro-ink:#17232d;--intro-muted:#53636f;color:var(--intro-ink)}.isg-intro-container{width:min(1080px,calc(100% - 88px));margin-inline:auto}.isg-intro-hero{background:var(--intro-navy);color:#fff;padding:clamp(48px,6vw,80px) 0 34px;border-bottom:4px solid var(--intro-orange)}.isg-intro-eyebrow{display:block;font-size:.8125rem;font-weight:750;letter-spacing:.14em;text-transform:uppercase;color:var(--intro-orange)}.isg-intro-hero .isg-intro-eyebrow{color:#ffb388}.isg-intro-hero h1{font-size:clamp(2.5rem,5.5vw,4.5rem);font-weight:650;line-height:1.07;letter-spacing:-.045em;margin:20px 0 38px;max-width:900px}.isg-intro-hero h1 span{color:#ffb388}.isg-intro-principle{display:flex;flex-wrap:wrap;gap:14px 30px;border-top:1px solid #ffffff35;padding-top:22px;color:#e3edf4;font-size:.9375rem;line-height:1.6}.isg-intro-principle span+span{padding-left:30px;border-left:1px solid #ffffff35}.isg-intro-body{padding-block:20px 58px}.isg-intro-chapter{display:grid;grid-template-columns:180px minmax(0,1fr);gap:48px;padding:40px 0;border-bottom:1px solid #d8e1e7}.isg-intro-label{display:flex;align-items:baseline;gap:14px;padding-top:4px}.isg-intro-label>span{font-size:.8125rem;white-space:nowrap;color:#af4515;font-weight:700}.isg-intro-label h2{font-size:.9375rem;font-weight:650;line-height:1.5;margin:0;color:var(--intro-muted)}.isg-intro-copy h3{font-size:clamp(1.4rem,2.25vw,1.875rem);line-height:1.25;letter-spacing:-.025em;font-weight:650;color:var(--intro-navy);margin:0 0 16px;max-width:720px}.isg-intro-copy p{font-size:1rem;line-height:1.85;margin:0;color:var(--intro-muted);max-width:790px}.isg-intro-reference{color:var(--intro-navy);text-decoration:underline;text-underline-offset:3px;font-weight:650}.isg-intro-next{padding-top:42px}.isg-intro-next-heading{margin-bottom:24px}.isg-intro-next-heading h2{font-size:clamp(1.7rem,3vw,2.375rem);font-weight:650;letter-spacing:-.035em;line-height:1.15;margin:10px 0 0;color:var(--intro-navy)}.isg-intro-next-heading .isg-intro-eyebrow{color:#af4515}.isg-intro-paths{display:grid;grid-template-columns:1fr 1fr;border:1px solid #cfdce5}.isg-intro-path{padding:28px 32px 32px;background:#f2f6f8;display:flex;flex-direction:column;transition:background .2s ease,color .2s ease;color:var(--intro-navy)}.isg-intro-path+.isg-intro-path{border-left:1px solid #cfdce5}.isg-intro-path-top{display:flex;justify-content:space-between;align-items:center;font-size:.875rem;font-weight:600;color:var(--intro-muted);gap:20px}.isg-intro-path-top>span{font-size:1.875rem;line-height:1;color:#af4515}.isg-intro-path h3{margin:28px 0 12px;font-size:clamp(1.5rem,2.5vw,2rem);letter-spacing:-.035em;line-height:1.15;font-weight:650}.isg-intro-path p{font-size:1rem;line-height:1.65;margin:auto 0 0;max-width:390px;color:var(--intro-muted)}.isg-intro-path:hover,.isg-intro-path:focus-visible{background:var(--intro-navy);color:#fff}.isg-intro-path:hover p,.isg-intro-path:focus-visible p,.isg-intro-path:hover .isg-intro-path-top,.isg-intro-path:focus-visible .isg-intro-path-top{color:#e3edf4}.isg-intro-path:hover .isg-intro-path-top>span,.isg-intro-path:focus-visible .isg-intro-path-top>span{color:#ffb388}.isg-introduction a:focus-visible{outline:3px solid #f36a2e;outline-offset:4px}.isg-intro-sources{display:flex;gap:28px;margin-top:32px;font-size:.8125rem;line-height:1.75;color:var(--intro-muted)}.isg-intro-sources>span{font-weight:700}.isg-intro-sources>div{display:flex;flex-wrap:wrap;gap:8px 22px}.isg-intro-sources a{text-decoration:underline;text-underline-offset:3px}@media(max-width:720px){.isg-intro-container{width:calc(100% - 40px)}.isg-intro-hero{padding-top:42px}.isg-intro-hero h1{margin-bottom:28px}.isg-intro-chapter{grid-template-columns:1fr;gap:14px;padding-block:28px}.isg-intro-principle{gap:8px 16px}.isg-intro-principle span+span{padding-left:0;border-left:0}.isg-intro-paths{grid-template-columns:1fr}.isg-intro-path+.isg-intro-path{border-left:0;border-top:1px solid #cfdce5}.isg-intro-path{padding:24px}.isg-intro-path h3{margin-top:22px}.isg-intro-sources{flex-direction:column;gap:8px}.isg-intro-sources>div{flex-direction:column}.isg-intro-body{padding-bottom:38px}}@media(prefers-reduced-motion:reduce){.isg-intro-path{transition:none}}