/* 全局样式 */
body {
    font-family: 'Helvetica', 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #f0f8ff, #e6e9f0);
    color: #333;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: bold;
    color: #2c3e50;
    text-align: center;
}

p {
    font-size: 1rem;
    margin: 16px 0;
    text-align: justify;
}

a {
    color: #4c6ef5;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    background: linear-gradient(135deg, #4c6ef5, #8e44ad);
    color: white;
    padding: 40px 20px;
    text-align: center;
    border-radius: 10px;
    margin-bottom: 20px;
}

.header h1 {
    font-size: 2.5rem;
    margin: 0;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 16px;
}

.grid-item {
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 20px;
    transition: transform 0.3s ease-in-out;
}

.grid-item:hover {
    transform: translateY(-5px);
}

pre {
    background: #f4f4f4;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-size: 0.9rem;
}

code {
    color: #d63384;
    font-family: 'Courier New', Courier, monospace;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

table th, table td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: center;
}

table th {
    background-color: #4c6ef5;
    color: white;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

@media (max-width: 768px) {
    .grid-container {
        grid-template-columns: repeat(6, 1fr);
    }

    h1 {
        font-size: 2rem;
    }

    p {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .grid-container {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 1.8rem;
    }

    p {
        font-size: 0.85rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 1s ease-in-out;
}

.particle {
    animation: particle 1s ease-in-out forwards;
}

@keyframes particle {
    0% { transform: translateX(-10px); opacity: 0; }
    100% { transform: translateX(0); opacity: 1; }
}

/* 视差滚动 */
.parallax {
    background-image: url('https://images.gptkong.com/demo/sample5.png');
    height: 300px;
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}