:root { color-scheme: light; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; color: #1d1d1f; background: #fff; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; min-height: 100dvh; display: flex; flex-direction: column; }
main { flex: 1; display: flex; align-items: center; justify-content: center; padding: 76px 24px 24px; }
.identity { text-align: center; max-width: 100%; }
.brand-logo { display: block; width: clamp(200px, 32vw, 260px); max-width: 100%; height: auto; margin: 0 auto 36px; }
.enter { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 13px 30px; border: 1px solid #0085ff; border-radius: 999px; background: #0085ff; color: white; font-size: 15px; font-weight: 500; line-height: 1.4; text-decoration: none; transition: background .18s ease, box-shadow .18s ease; }
.enter[href]:hover { background: #0085ff; filter: brightness(.92); box-shadow: 0 4px 14px #00000010; }
.enter[aria-disabled="true"] { cursor: default; }
a:focus-visible { outline: 2px solid #515154; outline-offset: 5px; }
footer { flex-shrink: 0; padding: 16px 24px max(20px, env(safe-area-inset-bottom)); text-align: center; }
footer a { display: inline-block; max-width: 100%; padding: 4px 0; font-size: 12px; line-height: 20px; color: #86868b; text-decoration: none; overflow-wrap: anywhere; }
footer a:hover { color: #515154; text-decoration: underline; text-underline-offset: 3px; }
@media (prefers-reduced-motion: reduce) { .enter { transition: none; } }