/* 全局样式 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }
    
    body {
        font-family: 'Roboto', sans-serif;
        font-size: 16px;
        line-height: 1.6;
        background: linear-gradient(135deg, #1e3c72, #2a5298);
        color: #ffffff;
        padding: 20px;
    }
    
    h1, h2, h3, h4 {
        color: #ffcc00;
        margin-bottom: 15px;
    }
    
    p {
        margin-bottom: 15px;
    }
    
    pre {
        background: rgba(255, 255, 255, 0.1);
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }
    
    code {
        font-family: 'Courier New', Courier, monospace;
        color: #ffcc00;
    }
    
    .container {
        display: grid;
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .matrix-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 15px;
    }
    
    .matrix-item {
        background: rgba(255, 255, 255, 0.2);
        padding: 20px;
        border-radius: 10px;
        text-align: center;
        transition: transform 0.3s ease;
    }
    
    .matrix-item:hover {
        transform: scale(1.05);
    }
    
    .button {
        background: #ff7f50;
        color: #ffffff;
        padding: 10px 20px;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        transition: background 0.3s ease, transform 0.3s ease;
    }
    
    .button:hover {
        background: #ff4500;
        transform: translateY(-5px);
    }
    
    .parallax-background {
        background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center;
        background-attachment: fixed;
        background-size: cover;
        height: 400px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #ffffff;
        font-size: 2em;
        text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    }
    
    .chart-container {
        width: 100%;
        height: 300px;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        padding: 20px;
    }
    
    .icon {
        width: 24px;
        height: 24px;
        fill: currentColor;
    }
    
    img {
        width: 100%;
        max-width: 320px;
        height: auto;
        border-radius: 10px;
        margin-bottom: 15px;
    }
    
    /* 动画 */
    @keyframes aurora-move {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }
    
    body {
        background: linear-gradient(135deg, #1e3c72, #2a5298);
        animation: aurora-move 15s linear infinite;
    }
    
    /* 响应式设计 */
    @media (max-width: 320px) {
        body {
            padding: 10px;
        }
        h1 {
            font-size: 1.5em;
        }
    }
    
    @media (max-width: 480px) {
        .container {
            grid-template-columns: 1fr;
        }
    }
    
    @media (max-width: 768px) {
        .matrix-grid {
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        }
    }
    
    @media (max-width: 1024px) {
        .parallax-background {
            height: 300px;
            font-size: 1.5em;
        }
    }
    
    @media (max-width: 1200px) {
        .matrix-grid {
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        }
    }
    
    @media (min-width: 1440px) {
        body {
            padding: 40px;
        }
        h1 {
            font-size: 2.5em;
        }
    }
    
    /* 链接样式 */
    a {
        color: #ffcc00;
        text-decoration: none;
    }
    
    a:hover {
        text-decoration: underline;
    }