/* 基础重置 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }
    
    /* 全局字体与背景 */
    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #0F4C81, #000000);
        color: #FFFFFF;
        line-height: 1.6;
        overflow-x: hidden;
    }
    
    /* 容器 */
    .container {
        width: 90%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 40px 0;
    }
    
    /* 导航栏 */
    .navbar {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(0, 0, 0, 0.8);
        padding: 20px 0;
        z-index: 1000;
        transition: all 0.3s ease;
    }
    
    .navbar.shrink {
        padding: 10px 0;
    }
    
    .navbar .logo {
        font-family: 'Poppins', sans-serif;
        font-size: 24px;
        color: #34C759;
        text-decoration: none;
    }
    
    .navbar ul {
        list-style: none;
        display: flex;
        justify-content: flex-end;
    }
    
    .navbar ul li {
        margin-left: 30px;
    }
    
    .navbar ul li a {
        color: #FFFFFF;
        text-decoration: none;
        font-size: 16px;
        transition: color 0.3s ease;
    }
    
    .navbar ul li a:hover {
        color: #34C759;
    }
    
    /* 主视觉区 */
    .hero {
        height: 100vh;
        background: url('https://images.gptkong.com/demo/sample3.png') no-repeat center center/cover;
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
    }
    
    .hero::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(15, 76, 129, 0.7);
    }
    
    .hero-content {
        position: relative;
        text-align: center;
        z-index: 1;
    }
    
    .hero-content h1 {
        font-family: 'Poppins', sans-serif;
        font-size: 48px;
        margin-bottom: 20px;
        color: #FFFFFF;
        text-transform: uppercase;
    }
    
    .hero-content p {
        font-size: 18px;
        margin-bottom: 30px;
        color: #FFFFFF;
    }
    
    .hero-content .btn {
        padding: 15px 30px;
        background: #34C759;
        color: #FFFFFF;
        border: none;
        border-radius: 5px;
        font-size: 16px;
        cursor: pointer;
        transition: all 0.3s ease;
    }
    
    .hero-content .btn:hover {
        background: #0F4C81;
        transform: scale(1.1);
    }
    
    /* 主要内容区 */
    .content {
        padding: 60px 0;
    }
    
    .content h2 {
        font-family: 'Poppins', sans-serif;
        font-size: 32px;
        text-align: center;
        margin-bottom: 40px;
        color: #34C759;
    }
    
    .content article {
        background: rgba(255, 255, 255, 0.1);
        padding: 30px;
        border-radius: 10px;
        margin-bottom: 40px;
    }
    
    .content article h3 {
        font-family: 'Poppins', sans-serif;
        font-size: 24px;
        margin-bottom: 20px;
        color: #34C759;
    }
    
    .content article p {
        font-size: 16px;
        margin-bottom: 20px;
        color: #FFFFFF;
    }
    
    .content article pre {
        background: #1E1E1E;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }
    
    .content article code {
        color: #34C759;
        font-family: 'Courier New', Courier, monospace;
    }
    
    .content article table {
        width: 100%;
        border-collapse: collapse;
        margin-top: 20px;
    }
    
    .content article table th,
    .content article table td {
        border: 1px solid #34C759;
        padding: 10px;
        text-align: left;
    }
    
    .content article table th {
        background: #0F4C81;
        color: #FFFFFF;
    }
    
    /* 图片展示区 */
    .gallery {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        gap: 20px;
    }
    
    .gallery img {
        width: 100%;
        border-radius: 10px;
        transition: transform 0.3s ease;
    }
    
    .gallery img:hover {
        transform: scale(1.05);
    }
    
    /* 底部区 */
    .footer {
        background: rgba(0, 0, 0, 0.9);
        padding: 40px 0;
        text-align: center;
        color: #FFFFFF;
    }
    
    .footer p {
        font-size: 14px;
    }
    
    /* 提示信息 */
    .notice {
        position: fixed;
        bottom: 20px;
        right: 20px;
        background: #34C759;
        color: #FFFFFF;
        padding: 10px 20px;
        border-radius: 5px;
        font-size: 14px;
        z-index: 1000;
        animation: fadeInOut 5s ease forwards;
    }
    
    @keyframes fadeInOut {
        0% { opacity: 0; }
        10% { opacity: 1; }
        90% { opacity: 1; }
        100% { opacity: 0; }
    }
    
    /* 响应式设计 */
    @media (max-width: 1440px) {
        .hero-content h1 {
            font-size: 42px;
        }
        .navbar ul li {
            margin-left: 20px;
        }
    }
    
    @media (max-width: 1200px) {
        .container {
            width: 95%;
        }
        .hero-content h1 {
            font-size: 36px;
        }
    }
    
    @media (max-width: 1024px) {
        .navbar ul {
            display: none;
        }
        .navbar .menu-icon {
            display: block;
            position: absolute;
            right: 20px;
            top: 25px;
            cursor: pointer;
        }
        .navbar .menu-icon div {
            width: 25px;
            height: 3px;
            background: #FFFFFF;
            margin: 5px 0;
            transition: all 0.3s ease;
        }
        .sidebar {
            position: fixed;
            top: 0;
            right: -250px;
            width: 250px;
            height: 100%;
            background: rgba(0, 0, 0, 0.9);
            padding: 60px 20px;
            transition: right 0.3s ease;
            z-index: 999;
        }
        .sidebar.active {
            right: 0;
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar ul li {
            margin: 20px 0;
        }
        .sidebar ul li a {
            color: #FFFFFF;
            text-decoration: none;
            font-size: 18px;
            transition: color 0.3s ease;
        }
        .sidebar ul li a:hover {
            color: #34C759;
        }
    }
    
    @media (max-width: 768px) {
        .hero-content h1 {
            font-size: 28px;
        }
        .content article {
            padding: 20px;
        }
        .content article h3 {
            font-size: 20px;
        }
        .gallery {
            grid-template-columns: 1fr;
        }
    }
    
    @media (max-width: 480px) {
        .navbar .logo {
            font-size: 20px;
        }
        .hero-content h1 {
            font-size: 24px;
        }
        .hero-content p {
            font-size: 16px;
        }
        .hero-content .btn {
            padding: 10px 20px;
            font-size: 14px;
        }
        .content h2 {
            font-size: 24px;
        }
        .content article h3 {
            font-size: 18px;
        }
        .content article p {
            font-size: 14px;
        }
    }
    
    @media (max-width: 320px) {
        .navbar .logo {
            font-size: 18px;
        }
        .hero-content h1 {
            font-size: 20px;
        }
        .hero-content p {
            font-size: 14px;
        }
        .hero-content .btn {
            padding: 8px 16px;
            font-size: 12px;
        }
        .content h2 {
            font-size: 20px;
        }
        .content article h3 {
            font-size: 16px;
        }
        .content article p {
            font-size: 12px;
        }
    }
    
    /* 动画与交互 */
    .hidden {
        opacity: 0;
        transform: translateY(20px);
        transition: all 0.5s ease;
    }
    
    .show {
        opacity: 1;
        transform: translateY(0);
    }
    
    /* 进度条 */
    .progress-circle {
        width: 100px;
        height: 100px;
        border-radius: 50%;
        background: conic-gradient(#34C759 0% 70%, #0F4C81 70% 100%);
        display: flex;
        align-items: center;
        justify-content: center;
        animation: rotate 2s linear infinite;
    }
    
    @keyframes rotate {
        from { transform: rotate(0deg); }
        to { transform: rotate(360deg); }
    }
    
    /* 动态加载 */
    .loading-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(15, 76, 129, 0.9);
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 2000;
        transition: opacity 0.5s ease;
    }
    
    .loading-overlay.fade-out {
        opacity: 0;
        visibility: hidden;
    }
    
    /* 表格样式 */
    table {
        width: 100%;
        border-collapse: collapse;
        margin-top: 20px;
    }
    
    table th, table td {
        border: 1px solid #34C759;
        padding: 10px;
        text-align: left;
    }
    
    table th {
        background: #0F4C81;
        color: #FFFFFF;
    }
    
    /* 代码块样式 */
    pre {
        background: #1E1E1E;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }
    
    code {
        color: #34C759;
        font-family: 'Courier New', Courier, monospace;
    }
    
    /* 图标样式 */
    .icon {
        width: 24px;
        height: 24px;
        fill: #34C759;
        transition: fill 0.3s ease;
    }
    
    .icon:hover {
        fill: #0F4C81;
    }
    
    /* 按钮悬停效果 */
    .button:hover {
        transform: scale(1.1);
        background: #0F4C81;
    }
    
    /* 表单样式（隐藏） */
    input, textarea {
        display: none;
    }
    
    /* 图片描述属性为空 */
    img {
        alt: "";
    }