/* 语言链接在无 JS、移动端和键盘操作下仍可使用。 */
[hidden] { display: none !important; }
main { overflow-wrap: anywhere; }
.language { position: relative; flex-shrink: 0; }
.nav > .language { margin-inline-start: auto; }
.language > summary { display: flex; align-items: center; gap: 7px; cursor: pointer; padding: 7px 11px; border: 1px solid #dbe2ea; border-radius: 10px; list-style: none; font-size: 14px; background: white; color: #334155; }
.language > summary::-webkit-details-marker { display: none; }
.language-list { position: absolute; inset-inline-end: 0; top: calc(100% + 8px); padding: 8px; width: 205px; max-height: 65vh; overflow-y: auto; border: 1px solid #e2e8f0; border-radius: 14px; background: white; box-shadow: 0 12px 32px #0f172a1a; z-index: 20; }
.nav nav .language-list a, .language-list a { display: block; padding: 9px 12px; border-radius: 8px; font-size: 14px; text-align: start; color: #334155; }
.language-list a:hover, .language-list a[aria-current="page"] { background: #e0f2fe; color: #0369a1; }
.language-list a[aria-current="page"] { font-weight: 700; }
a:focus-visible, summary:focus-visible { outline: 3px solid #0284c7; outline-offset: 3px; }
.hero { padding: 64px 0 48px; }
.hero h1 { font-size: clamp(32px, 5vw, 54px); max-width: 900px; margin-inline: auto; }
.brand-heading { display: inline-block; font-size: clamp(44px, 7vw, 76px); color: #0369a1; margin-bottom: 14px; }
.hero p { max-width: 760px; }
.hero .note { flex-basis: 100%; max-width: 720px; }
.why-block { padding: 48px 0; background: #f7f9fb; }
.why-h { font-size: clamp(26px, 4vw, 36px); }
.why-p { font-size: 18px; }
.faq { max-width: 840px; }
.faq details { border-bottom: 1px solid #dbe2ea; padding: 20px 0; }
.faq summary { font-size: 18px; font-weight: 650; cursor: pointer; }
.faq p { color: #475569; }
[dir="rtl"] ul { padding-left: 0; padding-inline-start: 22px; }
[dir="rtl"] .nav nav, [dir="rtl"] .foot nav { margin-left: 0; margin-inline-start: auto; }
@media (max-width: 720px) {
  .nav { gap: 10px; }
  .nav nav { margin-inline-start: auto; }
  .nav nav .language-list a { display: block; }
  .hero { padding: 44px 0 32px; }
  .cta .btn { justify-content: center; }
  .foot { align-items: flex-start; }
  .foot nav { flex-wrap: wrap; gap: 12px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }