/* ========================================
   导航栏 - navbar.css
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
    padding: 0.75rem 0;
}
.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    display: flex;
    align-items: center;
}
.logo img {
    display: block;
    height: 44px;
    width: auto;
}
.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}
.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-600);
    position: relative;
}
.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: var(--transition);
}
.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 5px;
}
.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    transition: var(--transition);
}