/* Shared navigation and footer for all four public pages. */
.navbar, .footer, .qr-modal { font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; }
/* Use the same primary font metrics even when only the homepage loads Inter. */
.navbar { font-family: 'Microsoft YaHei', 'PingFang SC', 'Noto Sans CJK SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.95); backdrop-filter: blur(12px); border-bottom: 1px solid #e2e8f0; }
.navbar .container { display: flex; align-items: center; justify-content: space-between; max-width: 1280px; height: 64px; margin: 0 auto; padding: 0 1rem; }
.navbar img { display: block; height: 60px; width: auto; max-width: 160px; object-fit: contain; }
.navbar .nav-links { display: flex; gap: 2.5rem; margin: 0; padding: 0; list-style: none; }
.navbar .nav-links li { display: block; }
.navbar .nav-links a { display: flex; align-items: center; height: 64px; padding: 0; border-bottom: 2px solid transparent; color: #64748b; font-size: .875rem; font-weight: 600; line-height: 1.6; white-space: nowrap; text-decoration: none; }
.navbar .nav-links a:hover, .navbar .nav-links a.active { color: #2563eb; }
.navbar .nav-links a.active { border-bottom-color: #2563eb; }
.navbar .nav-links a.active::after { display: none; }
.site-menu-toggle { display: none; }
.navbar a:focus-visible, .site-menu-toggle:focus-visible, .footer a:focus-visible { outline: 3px solid #60a5fa; outline-offset: 4px; }
.footer { background: #0f172a; color: #94a3b8; padding: 2.5rem 0 .5rem; line-height: 1.6; }
.footer .container { max-width: 1280px; margin: 0 auto; padding: 0 1rem; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 4rem; margin-bottom: 3rem; border-bottom: 1px solid rgba(255,255,255,.05); padding-bottom: 3rem; align-items: start; }
.footer h4 { color: white; font-weight: 700; font-size: .75rem; text-transform: uppercase; letter-spacing: .1em; margin: 0 0 1.5rem; }
.footer ul { list-style: none; padding: 0; margin: 0; font-size: .875rem; }
.footer a { text-decoration: none; color: inherit; }
.footer a:hover { color: #3b82f6; }
.footer .qr-codes { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.footer .qr-code { margin-left: 0 !important; text-align: center; cursor: pointer; transition: transform .3s; }
.footer .qr-code:hover { transform: scale(1.05); }
.footer .qr-code img { width: 100px; height: 100px; border-radius: 8px; margin-bottom: .5rem; background: white; padding: 4px; }
.footer .qr-code p { font-size: .75rem; color: #64748b; }
.footer .copyright { text-align: center; font-size: .625rem; text-transform: uppercase; letter-spacing: .1em; color: #475569; padding: .5rem 0; }
.qr-modal-content { max-width: calc(100% - 2rem); }
.qr-modal-content img { max-width: 100%; height: auto; aspect-ratio: 1; }
.site-software .content-grid { grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.site-support .cards { grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.site-support .contact-box { overflow-wrap: anywhere; }
@media(max-width: 900px) {
    .navbar .nav-links { gap: 1.2rem; }
}
@media(max-width: 768px) {
    .site-menu-toggle { display: flex; gap: .75rem; align-items: center; padding: .6rem .85rem; border: 1px solid #e2e8f0; border-radius: 6px; background: white; color: #0f172a; font: inherit; font-size: .875rem; cursor: pointer; }
    .navbar .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; padding: .5rem 1rem; background: white; border-bottom: 1px solid #e2e8f0; box-shadow: 0 12px 24px rgba(15,23,42,.08); }
    .navbar .nav-links.is-open { display: flex; flex-direction: column; gap: 0; }
    .navbar .nav-links a { height: 48px; padding: 0 .75rem; border: 0; border-left: 3px solid transparent; }
    .navbar .nav-links a.active { border-left-color: #2563eb; background: #eff6ff; }
    .navbar img { max-width: 120px; }
}