:root { color-scheme: light; font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif; background: #f3f2f7; color: #17171a; }
* { box-sizing: border-box; }
body { margin: 0; padding: 32px 16px 64px; }
main { max-width: 760px; margin: 0 auto; }
header { text-align: center; padding: 28px 12px 24px; }
.mark { display: inline-grid; place-items: center; width: 64px; height: 64px; border-radius: 20px; background: #17131f; color: #fff; font-size: 42px; line-height: 1; }
h1 { margin: 14px 0 4px; font-size: clamp(2rem, 7vw, 3.2rem); letter-spacing: -0.04em; }
header p { margin: 0; color: #686873; }
section { background: #fff; border-radius: 22px; padding: 26px 28px; margin: 16px 0; box-shadow: 0 8px 30px rgba(30, 25, 45, .06); }
h2 { margin: 0 0 12px; font-size: 1.45rem; }
p, li { font-size: 1rem; line-height: 1.62; }
.lead { color: #5e32a8; font-weight: 650; }
a { color: #2563eb; }
li { margin: 9px 0; }
footer { color: #767681; text-align: center; padding: 18px 0; font-size: .9rem; }
@media (max-width: 520px) { section { padding: 22px 20px; } body { padding-top: 12px; } }