:root{--blue:#184FA2;--blue-deep:#0d2e63;--blue-ink:#10264d;--orange:#EF7244;--sky:#eaf2ff;--sky-2:#f6f9fe;--line:#dfe7f3;--muted:#60708c;--radius:14px;--radius-lg:20px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--blue-ink);line-height:1.72;background:#fff}
a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}.wrap{width:min(1120px,calc(100% - 40px));margin:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.header-inner{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{display:flex;align-items:center;gap:.7rem;font-weight:800;color:var(--blue-ink)}
.brand-logo{width:70px;height:48px;background:#fff url("assets/logo.png") center/contain no-repeat;border-radius:8px}
.nav{display:flex;align-items:center;gap:1.15rem}.nav a{font-weight:650;font-size:.93rem}.nav .btn{text-decoration:none}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:10px;padding:.72rem 1.1rem;font-weight:750;border:1px solid transparent}.btn-orange{background:var(--orange);color:#fff}.btn-blue{background:var(--blue);color:#fff}.btn-light{background:#fff;border-color:var(--line)}
.hero{background:linear-gradient(135deg,var(--sky-2),#fff);padding:5rem 0 4rem;border-bottom:1px solid var(--line)}
.crumbs{font-size:.85rem;color:var(--muted);margin-bottom:1.5rem}.crumbs a{color:var(--muted)}
.hero h1{font-size:clamp(2.2rem,5vw,4rem);line-height:1.08;letter-spacing:-.035em;max-width:850px;margin:0 0 1.1rem}.hero .lead{font-size:1.15rem;color:var(--muted);max-width:780px}
.hero-actions{display:flex;gap:.75rem;flex-wrap:wrap;margin-top:1.6rem}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:3rem;padding:4rem 0}
.content h2{font-size:1.8rem;line-height:1.2;margin:2.5rem 0 .8rem}.content h3{font-size:1.25rem;margin:1.8rem 0 .5rem}.content p{font-size:1.03rem}.content ul,.content ol{padding-left:1.3rem}.content li{margin:.45rem 0}
.toc{position:sticky;top:100px;height:max-content;background:var(--sky-2);border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem}.toc strong{display:block;margin-bottom:.7rem}.toc a{display:block;padding:.3rem 0;font-size:.9rem}
.callout{background:var(--sky);border-left:4px solid var(--blue);border-radius:10px;padding:1.2rem 1.3rem;margin:1.5rem 0}.callout.orange{border-left-color:var(--orange)}
.compare{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.94rem}.compare th,.compare td{border:1px solid var(--line);padding:.8rem;text-align:left;vertical-align:top}.compare th{background:var(--sky-2)}
.faq{margin-top:2rem}.faq details{border-bottom:1px solid var(--line);padding:.1rem 0}.faq summary{cursor:pointer;font-weight:750;padding:1rem 0}.faq details p{padding:0 0 1rem;margin:0}
.related{background:var(--sky-2);padding:3.5rem 0;margin-top:2rem}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem}.card h3{margin:.1rem 0 .4rem;font-size:1.05rem}.card p{color:var(--muted);font-size:.92rem}
.site-footer{background:var(--blue-ink);color:rgba(255,255,255,.8);padding:3rem 0 1.5rem;margin-top:0}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2rem}.site-footer h3{color:#fff;font-size:1rem}.site-footer a{color:rgba(255,255,255,.82)}.footer-bottom{border-top:1px solid rgba(255,255,255,.15);margin-top:2rem;padding-top:1rem;font-size:.82rem}
@media(max-width:850px){.nav{display:none}.layout{grid-template-columns:1fr}.toc{position:static}.cards{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.wrap{width:min(100% - 28px,1120px)}.hero{padding:3.2rem 0}.layout{padding:2.5rem 0}.cards{grid-template-columns:1fr}.hero h1{font-size:2.35rem}}