/* 基础样式 */
    @import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #6A5ACD, #00BFFF);
        color: #ffffff;
        line-height: 1.6;
        overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
        font-weight: 700;
        color: #ffffff;
        margin-top: 0;
    }

    p {
        font-size: 1rem;
        color: #f0f0f0;
    }

    a {
        color: #ffffff;
        text-decoration: none;
        transition: color 0.3s ease;
        rel: nofollow;
    }

    a:hover {
        color: #00BFFF;
    }

    /* 容器 */
    .container {
        width: 90%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 40px 20px;
    }

    /* 导航栏 */
    nav {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 20px 0;
    }

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

    .nav-links {
        display: flex;
        gap: 20px;
    }

    .nav-links a {
        position: relative;
    }

    /* 按钮样式 */
    .button {
        background: linear-gradient(135deg, #6A5ACD, #00BFFF);
        border: none;
        padding: 12px 24px;
        color: #ffffff;
        cursor: pointer;
        border-radius: 25px;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .button:hover {
        transform: scale(1.1);
        box-shadow: 0 8px 16px rgba(0, 191, 255, 0.4);
    }

    /* 欢迎页面 */
    .welcome-section {
        height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        position: relative;
        overflow: hidden;
    }

    .welcome-section::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('https://images.gptkong.com/demo/sample1.png') center center / cover no-repeat;
        opacity: 0.3;
        z-index: 1;
    }

    .welcome-content {
        position: relative;
        z-index: 2;
        text-align: center;
    }

    .welcome-content h1 {
        font-size: 3rem;
        background: linear-gradient(135deg, #6A5ACD, #00BFFF);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        animation: gradient-animate 15s linear infinite;
    }

    @keyframes gradient-animate {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    /* 动态粒子效果 */
    .particles {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle, rgba(255,87,34,0.5), transparent);
        animation: aurora-move 15s linear infinite;
        z-index: 0;
    }

    @keyframes aurora-move {
        0% { transform: translateX(0) translateY(0); }
        50% { transform: translateX(50px) translateY(-50px); }
        100% { transform: translateX(0) translateY(0); }
    }

    /* AI工具入口 */
    .ai-tool-section {
        padding: 60px 0;
        background: rgba(0, 0, 0, 0.5);
        border-radius: 15px;
        margin: 40px 0;
    }

    .ai-tool-section h2 {
        text-align: center;
        margin-bottom: 40px;
    }

    .ai-tool-buttons {
        display: flex;
        justify-content: center;
        gap: 20px;
        flex-wrap: wrap;
    }

    /* 案例展示 */
    .case-study {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
        margin: 40px 0;
    }

    .case-card {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        transition: transform 0.3s ease, background 0.3s ease;
        position: relative;
    }

    .case-card:hover {
        transform: scale(1.05);
        background: rgba(0, 191, 255, 0.2);
    }

    .case-card img {
        width: 100%;
        border-radius: 10px;
    }

    .case-card h3 {
        margin: 15px 0;
    }

    .case-card p {
        font-size: 0.9rem;
    }

    /* 示范文章展示 */
    .sample-article {
        background: rgba(255, 255, 255, 0.1);
        padding: 40px;
        border-radius: 15px;
        margin: 60px 0;
    }

    .sample-article h2 {
        text-align: center;
        margin-bottom: 20px;
    }

    .sample-article pre {
        background: rgba(0, 0, 0, 0.7);
        padding: 15px;
        border-radius: 10px;
        overflow-x: auto;
    }

    .sample-article code {
        color: #00BFFF;
        font-family: 'Courier New', Courier, monospace;
        font-size: 0.9rem;
    }

    /* 表格样式 */
    table {
        width: 100%;
        border-collapse: collapse;
        margin: 20px 0;
    }

    table, th, td {
        border: 1px solid #ffffff;
    }

    th, td {
        padding: 12px;
        text-align: left;
    }

    th {
        background: rgba(0, 191, 255, 0.3);
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .welcome-content h1 {
            font-size: 2.5rem;
        }
    }

    @media (max-width: 1200px) {
        .nav-links {
            display: none;
        }
        .welcome-content h1 {
            font-size: 2rem;
        }
    }

    @media (max-width: 1024px) {
        .container {
            padding: 30px 15px;
        }
        .ai-tool-buttons {
            flex-direction: column;
            align-items: center;
        }
    }

    @media (max-width: 768px) {
        .welcome-content h1 {
            font-size: 1.8rem;
        }
        .case-study {
            grid-template-columns: 1fr;
        }
    }

    @media (max-width: 480px) {
        .welcome-content h1 {
            font-size: 1.5rem;
        }
        .ai-tool-section h2, .case-study h3, .sample-article h2 {
            font-size: 1.2rem;
        }
        p, li {
            font-size: 0.9rem;
        }
    }

    @media (max-width: 320px) {
        .welcome-content h1 {
            font-size: 1.2rem;
        }
        .button {
            padding: 10px 20px;
            font-size: 0.9rem;
        }
    }

    /* 装饰性图片 */
    .decorative-images {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
        margin: 40px 0;
    }

    .decorative-images img {
        width: 80px;
        height: 80px;
        object-fit: cover;
        border-radius: 10px;
    }

    /* 结束语 */
    .footer {
        text-align: center;
        padding: 20px 0;
        background: rgba(0, 0, 0, 0.5);
    }

    .footer p {
        margin: 0;
        font-size: 0.9rem;
    }