:root { color-scheme: light dark; --guide-bg: #fafbfd; --guide-surface: #fff; --guide-text: #16202e; --guide-muted: #5c6878; --guide-line: #e2e7ed; --guide-blue: #2264e5; --guide-soft: #edf3ff; }
* { box-sizing: border-box; }
html { scroll-padding-top: 28px; }
body { margin: 0; background: var(--guide-bg); color: var(--guide-text); font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; -webkit-font-smoothing: antialiased; }
a { color: var(--guide-blue); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration: underline; }
a:focus-visible { outline: 3px solid var(--guide-blue); outline-offset: 5px; border-radius: 3px; }
.guide-container { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.guide-skip { position: absolute; top: -100px; left: 24px; padding: 12px; background: var(--guide-surface); z-index: 2; }
.guide-skip:focus { top: 12px; }
.guide-header { background: var(--guide-surface); border-bottom: 1px solid var(--guide-line); }
.guide-header-inner { min-height: 82px; display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.guide-brand { color: var(--guide-text); font-size: 25px; letter-spacing: -.05em; font-weight: 750; text-decoration: none; }
.guide-brand span { margin-left: 8px; color: var(--guide-muted); font-size: 11px; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; }
.guide-header nav, .guide-footer nav { display: flex; align-items: center; gap: 26px; font-size: 14px; }
.guide-header nav > a:first-child { color: var(--guide-muted); text-decoration: none; }
.guide-button { display: inline-flex; align-items: center; justify-content: center; padding: 13px 20px; background: #2264e5; color: #fff; border-radius: 9px; text-decoration: none; font-size: 14px; font-weight: 650; line-height: 1.5; }
.guide-button:hover { background: #1b54c2; text-decoration: none; }
.guide-breadcrumb { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; color: var(--guide-muted); font-size: 13px; }
.guide-breadcrumb a { color: inherit; }
.guide-hero { max-width: 920px; padding: 42px 0 40px; }
.guide-eyebrow { margin: 0; color: var(--guide-blue); font-size: 11px; font-weight: 700; letter-spacing: .1em; line-height: 1.6; text-transform: uppercase; }
h1 { margin: 18px 0; max-width: 880px; font-size: clamp(32px, 4.3vw, 50px); font-weight: 650; letter-spacing: -.04em; line-height: 1.13; overflow-wrap: break-word; }
.guide-lead { max-width: 760px; margin: 0; color: var(--guide-muted); font-size: 19px; line-height: 1.7; }
.guide-meta { margin: 22px 0 0; color: var(--guide-muted); font-size: 12px; }
.guide-layout { display: grid; grid-template-columns: minmax(0, 750px) minmax(190px, 1fr); align-items: start; gap: 64px; padding-bottom: 72px; }
.guide-article { min-width: 0; font-size: 17px; line-height: 1.85; overflow-wrap: break-word; }
.guide-article section { margin-top: 42px; }
.guide-article h2 { margin: 0 0 16px; font-size: 25px; font-weight: 650; letter-spacing: -.025em; line-height: 1.35; }
.guide-article p { margin: 0 0 18px; }
.guide-article ul { padding-left: 24px; margin: 0 0 22px; }
.guide-article li { padding-left: 5px; margin-bottom: 8px; }
.guide-answer { padding: 25px 28px; border: 1px solid var(--guide-line); border-left: 3px solid var(--guide-blue); border-radius: 0 12px 12px 0; background: var(--guide-surface); }
.guide-answer p:last-child { margin: 10px 0 0; }
.guide-sidebar { position: sticky; top: 28px; padding-top: 4px; font-size: 13px; line-height: 1.6; }
.guide-sidebar ol { list-style: none; margin: 18px 0 0; padding: 0; }
.guide-sidebar li { margin-bottom: 14px; }
.guide-sidebar a { color: var(--guide-muted); text-decoration: none; }
.guide-sidebar a:hover { color: var(--guide-blue); }
.guide-cta { margin-top: 44px; padding: 30px; border-radius: 14px; background: var(--guide-soft); }
.guide-cta h2 { margin-top: 10px; }
.guide-cta p:not(.guide-eyebrow) { color: var(--guide-muted); }
.guide-related { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--guide-line); }
.guide-related > a { display: block; margin-top: 10px; font-size: 19px; font-weight: 600; line-height: 1.5; }
.guide-footer { border-top: 1px solid var(--guide-line); color: var(--guide-muted); font-size: 12px; }
.guide-footer > div { display: flex; justify-content: space-between; gap: 20px; padding-top: 28px; padding-bottom: 28px; }
.guide-footer nav { flex-wrap: wrap; font-size: 12px; gap: 18px; }
.guide-footer a { color: inherit; }
@media (prefers-color-scheme: dark) {
  :root { --guide-bg: #0b1018; --guide-surface: #101722; --guide-text: #eef2f7; --guide-muted: #9ba8ba; --guide-line: #243040; --guide-blue: #85afff; --guide-soft: #142440; }
}
@media (max-width: 850px) {
  .guide-layout { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .guide-sidebar { position: static; grid-row: 1; padding: 0 0 24px; border-bottom: 1px solid var(--guide-line); }
  .guide-sidebar ol { display: flex; flex-wrap: wrap; gap: 10px 20px; }
  .guide-sidebar li { margin: 0; }
}
@media (max-width: 540px) {
  .guide-container { width: calc(100% - 36px); }
  .guide-header-inner { min-height: 74px; gap: 14px; }
  .guide-brand { font-size: 24px; }
  .guide-brand span, .guide-header nav > a:first-child { display: none; }
  .guide-button { padding: 11px 14px; font-size: 13px; }
  .guide-breadcrumb { margin-top: 24px; font-size: 12px; }
  .guide-hero { padding: 30px 0; }
  .guide-lead { font-size: 17px; }
  .guide-article { font-size: 16px; line-height: 1.8; }
  .guide-article h2 { font-size: 23px; }
  .guide-answer { padding: 20px; }
  .guide-cta { padding: 24px; }
  .guide-footer > div { flex-direction: column; }
}