:root { color-scheme: light; font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; color: #1a1e27; background: #f1f3f6; }
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.8; }
a { color: #185eaf; text-underline-offset: .2em; }
a:focus-visible { outline: 2px solid #2878df; outline-offset: 5px; }
.guide-header, main, footer { width: min(960px, calc(100% - 40px)); margin: 0 auto; }
.guide-header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; padding: 24px 0; border-bottom: 1px solid #dbe0e7; }
.guide-header img { display: block; width: 154px; height: auto; }
nav { display: flex; flex-wrap: wrap; gap: 20px; }
nav a { text-decoration: none; }
main { padding: 50px 0; }
.eyebrow { color: #526174; font-size: 14px; }
h1 { font-size: clamp(28px, 4vw, 44px); line-height: 1.35; letter-spacing: -.025em; margin: 12px 0 24px; }
h2 { font-size: 23px; line-height: 1.45; margin: 0 0 16px; }
h3 { font-size: 18px; margin: 18px 0 6px; }
p { max-width: 76ch; margin: 0 0 18px; }
.lead { color: #455365; font-size: 18px; }
section { border-top: 1px solid #dbe0e7; margin-top: 36px; padding-top: 28px; }
li { padding: 4px 0; }
.cta { display: inline-block; padding: 10px 22px; border-radius: 8px; color: #fff; background: #185eaf; text-decoration: none; margin: 8px 0; }
footer { padding: 20px 0 32px; border-top: 1px solid #dbe0e7; font-size: 13px; color: #566273; }
footer a { color: inherit; }
@media (max-width: 520px) { main { padding-top: 28px; } nav { gap: 14px; font-size: 14px; } }