/* Responsive site styles */
:root{--bg:#edf2f8;--ink:#202936;--accent:#356da8;--surface:#fbfdff;--line:#bdcadd;--muted:color-mix(in srgb,#202936 58%,transparent);--shadow:color-mix(in srgb,#356da8 24%,transparent);--highlight:color-mix(in srgb,#356da8 48%,white)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75}a{color:inherit;text-decoration-thickness:.08em;text-underline-offset:.2em}header,main,footer{width:min(1120px,calc(100% - 40px));margin-inline:auto}header{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:24px 0;border-bottom:1px solid var(--line)}header nav,footer nav,.topic-map{display:flex;flex-wrap:wrap;gap:12px}.brand{font-weight:760;text-decoration:none;letter-spacing:.02em}.brand small{display:block;font-size:.68rem;font-weight:600;color:var(--muted);letter-spacing:.13em}.hero{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(260px,.8fr);gap:48px;padding:72px 0 56px}.hero-copy{min-width:0}.eyebrow{font-size:.73rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);font-weight:800}h1{font-size:clamp(2.45rem,7vw,5.7rem);line-height:1.02;letter-spacing:-.045em;margin:.25em 0}h2{font-size:clamp(1.45rem,3vw,2.35rem);line-height:1.2;margin:.3em 0}.lead{font-size:1.15rem;max-width:48rem}.intent,.notice{padding:16px 18px;border-left:4px solid var(--accent);background:var(--surface)}.notice{margin-top:18px}.topic-map{margin:24px 0}.topic-map a{background:var(--ink);color:var(--surface);padding:8px 13px;border-radius:999px;text-decoration:none}.track-panel{align-self:start;position:sticky;top:24px;background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:26px;box-shadow:12px 14px 0 var(--shadow)}.track-panel ul{padding-left:1.2rem}.answer{padding:56px 0;border-top:1px solid var(--line)}.answer-head{display:grid;grid-template-columns:64px minmax(0,1fr);gap:20px;align-items:start}.answer-head>span{display:grid;place-items:center;aspect-ratio:1;border-radius:50%;background:var(--accent);color:white;font-weight:800}.answer-copy{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:28px 0}.answer-copy p,.review-copy p{margin:0;padding:22px;background:var(--surface);border:1px solid var(--line);border-radius:16px}.checklist{display:flex;flex-wrap:wrap;gap:10px}.checklist span{padding:7px 11px;border:1px solid var(--line);border-radius:8px}.review{padding:48px;background:var(--ink);color:var(--surface);border-radius:28px;margin:28px 0 72px}.review .eyebrow{color:var(--highlight)}.review-copy{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.review-copy p{background:color-mix(in srgb,var(--ink) 86%,white);border-color:color-mix(in srgb,var(--ink) 70%,white)}.faq{padding:56px 0}.faq details{border-top:1px solid var(--line);padding:18px 0}.faq summary{cursor:pointer;font-weight:750}.faq details p{max-width:52rem}footer{display:flex;justify-content:space-between;gap:24px;padding:36px 0;border-top:1px solid var(--line)}.support-page{max-width:760px;padding:72px 0}.support-page h1{font-size:clamp(2.2rem,6vw,4.5rem)}.support-page p{padding:14px 0;border-bottom:1px solid var(--line)}
@media(max-width:820px){header,footer{align-items:flex-start;flex-direction:column}.hero{grid-template-columns:1fr;padding-top:48px}.track-panel{position:static}.answer-copy,.review-copy{grid-template-columns:1fr}.review{padding:28px}.answer-head{grid-template-columns:48px minmax(0,1fr}}
@media(max-width:520px){header,main,footer{width:min(100% - 24px,1120px)}header nav{display:none}h1{font-size:2.55rem}.hero{gap:24px}.answer{padding:40px 0}.answer-head{display:block}.answer-head>span{width:42px;margin-bottom:12px}}