/* 滑块样式自定义 */
input[type="range"] {
    -webkit-appearance: none;
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: #3b82f6;
    border-radius: 50%;
    cursor: pointer;
    transition: background .2s ease-in-out;
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: #2563eb;
}

/* 响应式调整 */
@media (max-width: 640px) {
    .container {
        padding: 1rem;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .text-4xl {
        font-size: 1.75rem;
    }
}