:root { color-scheme: light; font-family: system-ui, "Microsoft YaHei", sans-serif; color: #18283d; background: #f3f5f8; }
* { box-sizing: border-box; }
body { margin: 0; padding: 32px 16px; }
main { max-width: 640px; margin: 8vh auto; padding: 32px; background: white; border: 1px solid #dce2eb; border-radius: 12px; }
h1 { margin: 8px 0 20px; font-size: 1.75rem; }
p { line-height: 1.7; }
.eyebrow, .hint { color: #526279; font-size: .9rem; }
dl { margin: 24px 0; }
dt { margin-top: 18px; color: #526279; font-size: .9rem; }
dd { margin: 5px 0 0; overflow-wrap: anywhere; line-height: 1.6; }
.notice { padding: 12px 16px; border-left: 3px solid #9a5b12; background: #fff7e9; }
.success { border-color: #17724c; background: #ecf7f0; }
.button, button { display: inline-block; min-height: 44px; padding: 11px 20px; border: 0; border-radius: 6px; color: white; background: #175fc7; font: inherit; text-decoration: none; cursor: pointer; }
.button:focus-visible, button:focus-visible { outline: 3px solid #143e80; outline-offset: 3px; }
@media (max-width: 480px) { body { padding: 16px 12px; } main { margin: 16px auto; padding: 24px 20px; } .button, button { width: 100%; text-align: center; } }