.logo-on-dark .logo-title .text-blue-900 {
    color: #fff !important;
}

.logo-on-dark .logo-title .text-orange-500 {
    color: #fb923c !important;
}
.logo-on-dark .logo-subtitle {
    color: #fb923c;
}

.logo-on-dark .logo-tagline-zh {
    color: #bfdbfe;
}

.logo-on-dark .logo-mark {
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0.05) 100%);
    border: 1px solid rgba(255,255,255,0.25);
}

.logo-mark {
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
}

.logo-mark svg {
    display: block;
}

.site-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    text-decoration: none;
    transition: opacity 0.2s;
}

.site-logo:hover {
    opacity: 0.9;
}

.logo-title {
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.logo-subtitle {
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: #1d4ed8;
}

.logo-tagline-zh {
    font-size: 0.65rem;
    font-weight: 600;
    color: #64748b;
    letter-spacing: 0.05em;
}

.logo-size-sm .logo-mark { width: 2.25rem; height: 2.25rem; border-radius: 0.5rem; }
.logo-size-sm .logo-mark svg { width: 1.25rem; height: 1.25rem; }
.logo-size-sm .logo-title { font-size: 1rem; }
.logo-size-sm .logo-subtitle { font-size: 0.55rem; }

.logo-size-md .logo-mark { width: 2.5rem; height: 2.5rem; border-radius: 0.625rem; }
.logo-size-md .logo-mark svg { width: 1.375rem; height: 1.375rem; }
.logo-size-md .logo-title { font-size: 1.125rem; }
.logo-size-md .logo-subtitle { font-size: 0.625rem; }

.logo-size-lg .logo-mark { width: 3rem; height: 3rem; border-radius: 0.75rem; }
.logo-size-lg .logo-mark svg { width: 1.625rem; height: 1.625rem; }
.logo-size-lg .logo-title { font-size: 1.5rem; }
.logo-size-lg .logo-subtitle { font-size: 0.7rem; }

.logo-hero .logo-mark { width: 4rem; height: 4rem; border-radius: 1rem; }
.logo-hero .logo-mark svg { width: 2.25rem; height: 2.25rem; }
.logo-hero .logo-title { font-size: 2rem; }
.logo-hero .logo-subtitle { font-size: 0.8rem; }
.logo-hero .logo-tagline-zh { font-size: 0.85rem; }

@media (min-width: 768px) {
    .logo-hero .logo-mark { width: 5rem; height: 5rem; }
    .logo-hero .logo-mark svg { width: 2.75rem; height: 2.75rem; }
    .logo-hero .logo-title { font-size: 2.5rem; }
    .logo-hero .logo-subtitle { font-size: 0.9rem; }
}