.site-global-nav {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    height: 72px;
    padding: 0;
    border: 0;
    border-bottom: 1px solid rgba(15, 23, 42, 0.1);
    background: rgba(255, 255, 255, 0.94);
    color: #111827;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
    box-shadow: none;
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    backdrop-filter: blur(18px) saturate(160%);
}

.site-global-nav *,
.site-global-nav *::before,
.site-global-nav *::after {
    box-sizing: border-box;
}

.site-global-nav .site-nav-inner {
    display: grid;
    grid-template-columns: minmax(180px, 1fr) auto minmax(180px, 1fr);
    align-items: center;
    width: min(calc(100% - 40px), 1200px);
    max-width: 1200px;
    height: 72px;
    margin: 0 auto;
    padding: 0;
}

.site-global-nav .nav-brand {
    display: inline-flex;
    align-items: baseline;
    justify-self: start;
    gap: 0.42rem;
    margin: 0;
    padding: 0.35rem 0;
    border: 0;
    background: none;
    color: #111827;
    font-size: 1.28rem;
    font-weight: 760;
    line-height: 1;
    letter-spacing: -0.025em;
    text-decoration: none;
    -webkit-text-fill-color: currentColor;
}

.site-global-nav .name-sep {
    color: #9ca3af;
    font-size: 0.8em;
    font-weight: 500;
}

.site-global-nav .name-zh {
    color: #6b7280;
    font-size: 0.82em;
    font-weight: 560;
    letter-spacing: 0;
}

.site-global-nav .nav-menu {
    position: static;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.4rem;
    width: auto;
    margin: 0;
    padding: 0;
    background: transparent;
    box-shadow: none;
    list-style: none;
    transform: none;
}

.site-global-nav .nav-menu > li {
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-global-nav .nav-menu a {
    position: relative;
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    margin: 0;
    padding: 0.35rem 0.05rem;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: #4b5563;
    font-size: 0.91rem;
    font-weight: 620;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
}

.site-global-nav .nav-menu a::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 2px;
    left: 0;
    width: auto;
    height: 2px;
    border-radius: 999px;
    background: #111827;
    opacity: 0;
    transform: scaleX(0.45);
    transition: opacity 160ms ease, transform 160ms ease;
}

.site-global-nav .nav-menu a:hover,
.site-global-nav .nav-menu a.active,
.site-global-nav .nav-menu a[aria-current] {
    color: #111827;
}

.site-global-nav .nav-menu a:hover::after,
.site-global-nav .nav-menu a.active::after,
.site-global-nav .nav-menu a[aria-current]::after {
    width: auto;
    opacity: 1;
    transform: scaleX(1);
}

.site-global-nav .nav-brand:focus-visible,
.site-global-nav .nav-menu a:focus-visible,
.site-global-nav button:focus-visible {
    outline: 2px solid #4f46e5;
    outline-offset: 4px;
}

.site-global-nav .nav-lang-toggle {
    display: flex;
    justify-self: end;
    gap: 0.35rem;
    min-width: 0;
    margin: 0;
}

.site-global-nav .lang-btn,
.site-global-nav .lang-btn-mobile {
    min-height: 34px;
    margin: 0;
    padding: 0.38rem 0.72rem;
    border: 0;
    border-radius: 999px;
    background: rgba(17, 24, 39, 0.06);
    color: #6b7280;
    font: inherit;
    font-size: 0.78rem;
    line-height: 1;
    cursor: pointer;
}

.site-global-nav .lang-btn:hover,
.site-global-nav .lang-btn-mobile:hover {
    background: rgba(17, 24, 39, 0.11);
    color: #111827;
}

.site-global-nav .lang-btn.active,
.site-global-nav .lang-btn-mobile.active {
    background: #111827;
    color: #ffffff;
}

.site-global-nav .nav-menu-lang-item,
.site-global-nav .nav-lang-toggle-mobile,
.site-global-nav .hamburger {
    display: none;
}

body.site-nav-injected,
body:has(> .site-global-nav[data-site-nav-injected="true"]) {
    padding-top: 72px;
}

body.site-nav-injected .topbar,
body.site-nav-injected header:has(+ main),
body:has(> .site-global-nav[data-site-nav-injected="true"]) .topbar,
body:has(> .site-global-nav[data-site-nav-injected="true"]) header:has(+ main) {
    top: 72px;
}

body.site-nav-injected .sidebar {
    top: 72px;
    height: calc(100vh - 72px);
}

body:has(> .site-global-nav[data-site-nav-injected="true"]) .sidebar {
    top: 72px;
    height: calc(100vh - 72px);
}

@media (max-width: 768px) {
    .site-global-nav,
    .site-global-nav .site-nav-inner {
        height: 68px;
    }

    .site-global-nav .site-nav-inner {
        display: flex;
        width: min(calc(100% - 32px), 1200px);
        justify-content: space-between;
    }

    .site-global-nav .nav-brand {
        font-size: 1.25rem;
    }

    body.site-nav-injected,
    body:has(> .site-global-nav[data-site-nav-injected="true"]) {
        padding-top: 68px;
    }

    body.site-nav-injected .topbar,
    body.site-nav-injected header:has(+ main),
    body:has(> .site-global-nav[data-site-nav-injected="true"]) .topbar,
    body:has(> .site-global-nav[data-site-nav-injected="true"]) header:has(+ main) {
        top: 68px;
    }

    body.site-nav-injected .sidebar {
        top: 68px;
        height: calc(100vh - 68px);
    }

    body:has(> .site-global-nav[data-site-nav-injected="true"]) .sidebar {
        top: 68px;
        height: calc(100vh - 68px);
    }

    .site-global-nav .nav-lang-toggle {
        display: none;
    }

    .site-global-nav .hamburger {
        position: static;
        display: inline-flex;
        flex: 0 0 44px;
        width: 44px;
        height: 44px;
        align-items: center;
        justify-content: center;
        flex-direction: column;
        gap: 5px;
        margin: 0;
        padding: 0;
        border: 0;
        border-radius: 50%;
        background: transparent;
        cursor: pointer;
    }

    .site-global-nav .hamburger span {
        display: block;
        width: 21px;
        height: 2px;
        margin: 0;
        border-radius: 999px;
        background: #111827;
        transition: transform 160ms ease, opacity 160ms ease;
    }

    .site-global-nav .hamburger.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .site-global-nav .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .site-global-nav .hamburger.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .site-global-nav .nav-menu {
        position: fixed;
        inset: 68px 0 auto;
        display: flex;
        width: 100%;
        max-height: calc(100vh - 68px);
        align-items: stretch;
        flex-direction: column;
        gap: 0;
        overflow-y: auto;
        padding: 0.8rem 1rem 1rem;
        border-top: 1px solid rgba(15, 23, 42, 0.08);
        background: rgba(255, 255, 255, 0.98);
        box-shadow: 0 18px 44px rgba(15, 23, 42, 0.12);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-12px);
        transition: opacity 160ms ease, transform 160ms ease;
    }

    .site-global-nav .nav-menu.active {
        left: 0;
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .site-global-nav .nav-menu a {
        display: flex;
        min-height: 48px;
        justify-content: center;
        padding: 0.75rem 1rem;
        border-radius: 10px;
        font-size: 1rem;
    }

    .site-global-nav .nav-menu a::after {
        display: none;
    }

    .site-global-nav .nav-menu a:hover,
    .site-global-nav .nav-menu a.active,
    .site-global-nav .nav-menu a[aria-current] {
        background: #f3f4f6;
    }

    .site-global-nav .nav-menu-lang-item,
    .site-global-nav .nav-lang-toggle-mobile {
        display: flex;
    }

    .site-global-nav .nav-lang-toggle-mobile {
        justify-content: center;
        gap: 0.45rem;
        padding-top: 0.65rem;
        border-top: 1px solid #e5e7eb;
    }
}

@media (prefers-reduced-motion: reduce) {
    .site-global-nav .nav-menu,
    .site-global-nav .nav-menu a::after,
    .site-global-nav .hamburger span {
        transition: none;
    }
}
html:not([data-language-switch="available"]) .nav-lang-toggle,
html:not([data-language-switch="available"]) .nav-menu-lang-item {
    display: none !important;
}