/* ==================== 导航菜单 ==================== */
.main-nav {
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #ffd89b;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.nav-link.active {
    background: rgba(255, 216, 155, 0.2);
    color: #ffd89b;
}

.nav-controls {
    display: flex;
    gap: 10px;
}

.sound-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sound-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.sound-toggle.muted {
    opacity: 0.5;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .nav-menu {
        gap: 10px;
    }
    
    .nav-link {
        padding: 6px 10px;
        font-size: 0.85rem;
    }
}