.text-shadow {
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
}
.transition-all-300 {
    transition: all 0.3s ease;
}
.btn-hover-effect {
    transition: all 0.3s ease;
}
.btn-hover-effect:hover {
    transform: translateY(-2px) scale(1.02);
}
.link-hover-effect {
    transition: all 0.3s ease;
    position: relative;
}
.link-hover-effect::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: currentColor;
    transition: width 0.3s ease;
}
.link-hover-effect:hover::after {
    width: 100%;
}
.bg-gradient-primary {
    background: linear-gradient(135deg, #1e40af 0%, #2563eb 35%, #3b82f6 70%, #60a5fa 100%);
}
.card-hover-effect {
    transition: all 0.3s ease;
}
.card-hover-effect:hover {
    transform: translateY(-4px);
}

.site-logo {
    display: inline-flex;
    align-items: center;
    gap: .65rem;
}
.site-logo__mark {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: .65rem;
    background: #10b981;
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    flex-shrink: 0;
}
.site-logo__text {
    display: flex;
    flex-direction: column;
    line-height: 1.05;
}
.site-logo__text strong {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: .02em;
    color: #111827;
    transition: color .3s ease;
}
.site-logo__text small {
    margin-top: .18rem;
    font-size: .68rem;
    letter-spacing: .16em;
    font-weight: 700;
    color: #10b981;
    transition: color .3s ease;
}

/* 下拉后导航变蓝，Logo 文字同步变白 */
#navbar.is-scrolled .site-logo__text strong,
#navbar.is-scrolled .site-logo__text small {
    color: #fff;
}