/* 点击音效样式 */
.click-sound {
    position: fixed;
    top: -100px;
    left: -100px;
    width: 0;
    height: 0;
    opacity: 0;
    z-index: -1;
}

/* 移动端优化 */
@media (max-width: 576px) {
    header h1 {
        font-size: 2rem;
    }
    
    .navbar-nav {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-item {
        margin: 0.25rem;
    }
    
    .nav-link {
        padding: 0.5rem 0.75rem !important;
        font-size: 0.9rem;
    }
    
    .card-header {
        padding: 0.75rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .table th, .table td {
        padding: 0.75rem 0.5rem;
        font-size: 0.9rem;
    }
    
    .rating {
        font-size: 1.2rem;
    }
    
    .use-case-tabs {
        display: flex;
        flex-wrap: wrap;
    }
    
    .use-case-tab {
        margin: 0.25rem;
        padding: 0.5rem 0.75rem;
        font-size: 0.9rem;
    }
}

/* 加载动画 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--dark-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 100px;
    height: 100px;
    border: 10px solid var(--accent-color);
    border-top: 10px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 装饰元素 */
.decor-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.decor-element {
    position: absolute;
    opacity: 0.5;
}

.shape-circle {
    border-radius: 50%;
}

.shape-square {
    border-radius: 0;
}

.shape-triangle {
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
}

.color-primary {
    background-color: var(--primary-color);
}

.color-secondary {
    background-color: var(--secondary-color);
}

.color-accent {
    background-color: var(--accent-color);
}

/* 打印样式优化 */
@media print {
    header, footer, nav, .btn, .decor-container {
        display: none !important;
    }
    
    body, .container, section, .card {
        margin: 0 !important;
        padding: 0.5cm !important;
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
    
    h1, h2, h3, h4 {
        page-break-after: avoid;
    }
    
    table, figure, .card {
        page-break-inside: avoid;
    }
    
    .collapsible-body {
        display: block !important;
    }
}