.site-header { background: #082b53; color: white; border-bottom: 1px solid #ffffff1f; }
.header-inner { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; min-height: 92px; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; flex-shrink: 0; }
.brand-wordmark { width:130px; height:auto; }

.site-nav { display: flex; align-items: center; gap: 32px; }
.site-nav a { padding-block: 10px; text-decoration: none; font-size: 16px; font-weight: 600; }
.site-nav a:hover, .site-nav a[aria-current] { color: #b9e7ff; }
.site-nav .nav-download { background: #b9e7ff; color: #082b53; border-radius: 99px; padding: 9px 22px; }
.site-nav .nav-download:hover { background: #def3ff; }
.menu-toggle { border: 0; background: none; padding: 10px 0 10px 14px; min-height: 44px; align-items: center; gap: 12px; color: white; cursor: pointer; }
.menu-icon { display: grid; gap: 5px; width: 20px; }
.menu-icon i { display: block; height: 1.5px; background: currentColor; transition: transform .15s; }
[aria-expanded="true"] .menu-icon i:first-child { transform: translateY(3.25px) rotate(45deg); }
[aria-expanded="true"] .menu-icon i:last-child { transform: translateY(-3.25px) rotate(-45deg); }
.button-row { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 24px; min-height: 48px; padding: 12px 24px; border-radius: 99px; text-decoration: none; font-size: 16px; font-weight: 600; border: 1px solid transparent; cursor: pointer; transition: background .2s; }
.button.primary { color: white; background: var(--navy); }
.button.primary:hover { background: var(--navy-deep); }
.button.light { background: #b9e7ff; color: #082b53; }
.button.light:hover { background: #def3ff; }
.text-link { display: inline-flex; align-items: center; gap: 16px; min-height: 44px; color: var(--navy); font-size: 16px; font-weight: 600; text-decoration: none; }
.text-link:hover { text-decoration: underline; }
.back-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--muted); font-size: 14px; }
.site-footer { background: #082b53; color: #cfdfed; padding-block: 20px; font-size: 13px; }
.footer-bottom, .footer-identity, .footer-bottom nav { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 20px; }
.footer-bottom { justify-content: space-between; gap: 20px; }
.footer-bottom a { display: inline-flex; align-items: center; min-height: 32px; text-decoration: none; }
.footer-bottom a:hover, .footer-bottom a:focus-visible { text-decoration: underline; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:first-child { border-top: 1px solid var(--line); }
summary { list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding-block: 22px; cursor: pointer; font-weight: 600; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; flex-shrink: 0; color: var(--navy); font-size: 22px; font-weight: 400; }
details[open] > summary::after { content: "−"; }
summary:hover { color: var(--navy); }
details > p { color: var(--muted); margin: 0 0 20px; line-height: 1.85; }
@media (max-width:760px) {
 .header-inner { min-height: 76px; gap: 0; }
 .brand-wordmark { width:105px; }
 .brand { gap:9px; }
 .menu-toggle:not([hidden]) { display: inline-flex; }
 .site-nav { width: 100%; flex-direction: column; align-items: stretch; gap: 0; padding: 12px 0 20px; border-top: 1px solid #ffffff26; }
 .navigation-js .site-nav:not([data-open="true"]) { display: none; }
 .site-nav > a, .site-nav .nav-download { padding: 14px 4px; background: none; border-radius: 0; color: white; }
 .site-nav .nav-download:hover { background: none; }
 .site-footer { padding-block: 16px; }
 .footer-bottom { align-items: flex-start; flex-direction: column; gap: 8px; }
 .footer-identity { row-gap: 4px; }
 .button-row { gap: 12px 20px; }
}
.site-nav .nav-download[aria-current] { color: #082b53; }

/* 导航数据共用，电脑端入口调整不改变手机菜单。 */
.brand-wordmark-zh,.site-nav .desktop-nav { display:none; }
@media(min-width:761px) {
 .site-nav .mobile-nav { display:none; }
 .site-nav .desktop-nav { display:inline-flex; }
}