:root {
            --primary-color: #4361ee;
            --primary-light: #4895ef;
            --secondary-color: #3a0ca3;
            --accent-color: #f72585;
            --background-color: #f8f9fa;
            --text-color: #2b2d42;
            --light-text: #8d99ae;
            --white: #ffffff;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
            --shadow-md: 0 4px 6px rgba(0,0,0,0.1), 0 1px 3px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 25px rgba(0,0,0,0.1), 0 5px 10px rgba(0,0,0,0.05);
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Noto Sans SC', 'Roboto', sans-serif;
            line-height: 1.8;
            color: var(--text-color);
            background-color: var(--background-color);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: var(--white);
            padding: 4rem 0 6rem;
            margin-bottom: -3rem;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        header::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 75% 30%, rgba(255,255,255,0.1) 0%, transparent 30%);
        }

        .header-content {
            position: relative;
            z-index: 1;
        }

        h1 {
            font-size: 2.8rem;
            font-weight: 700;
            margin-bottom: 1rem;
            line-height: 1.2;
        }

        .subtitle {
            font-size: 1.2rem;
            font-weight: 300;
            opacity: 0.9;
            max-width: 700px;
        }

        .content {
            background: var(--white);
            padding: 3rem;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            margin-bottom: 3rem;
            position: relative;
            transition: var(--transition);
        }

        .content:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        h2 {
            color: var(--secondary-color);
            font-size: 1.8rem;
            margin: 2rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary-light);
        }

        h3 {
            color: var(--primary-color);
            font-size: 1.4rem;
            margin: 1.8rem 0 1rem;
        }

        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            color: var(--text-color);
        }

        a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            border-bottom: 1px solid transparent;
        }

        a:hover {
            color: var(--secondary-color);
            border-bottom-color: var(--accent-color);
        }

        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            margin: 2rem 0;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            display: block;
        }

        img:hover {
            transform: scale(1.01);
            box-shadow: var(--shadow-lg);
        }

        .img-caption {
            text-align: center;
            font-size: 0.9rem;
            color: var(--light-text);
            margin-top: -1.5rem;
            margin-bottom: 2rem;
        }

        code {
            font-family: 'Roboto Mono', monospace;
            background: rgba(67, 97, 238, 0.1);
            padding: 0.2rem 0.4rem;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            color: var(--secondary-color);
        }

        pre {
            background: #2b2d42;
            color: #f8f9fa;
            padding: 1.5rem;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 2rem 0;
            box-shadow: var(--shadow-md);
        }

        pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        blockquote {
            border-left: 4px solid var(--primary-color);
            padding: 1rem 1.5rem;
            margin: 2rem 0;
            background: rgba(67, 97, 238, 0.05);
            font-style: italic;
            color: var(--secondary-color);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
        }

        blockquote p {
            margin-bottom: 0;
        }

        ul, ol {
            margin: 1.5rem 0;
            padding-left: 2rem;
        }

        li {
            margin-bottom: 0.5rem;
        }

        .btn {
            display: inline-block;
            background: var(--primary-color);
            color: white;
            padding: 0.8rem 1.5rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-sm);
            text-decoration: none;
        }

        .btn:hover {
            background: var(--secondary-color);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            color: white;
        }

        .footer {
            text-align: center;
            padding: 2rem 0;
            color: var(--light-text);
            font-size: 0.9rem;
        }

        /* 响应式设计 */
        @media (max-width: 992px) {
            .container {
                padding: 0 1.5rem;
            }
            
            h1 {
                font-size: 2.4rem;
            }
            
            .content {
                padding: 2rem;
            }
        }

        @media (max-width: 768px) {
            header {
                padding: 3rem 0 5rem;
            }
            
            h1 {
                font-size: 2rem;
            }
            
            .subtitle {
                font-size: 1.1rem;
            }
            
            .content {
                padding: 1.5rem;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding: 0 1rem;
            }
            
            header {
                padding: 2rem 0 4rem;
            }
            
            h1 {
                font-size: 1.8rem;
            }
            
            .content {
                padding: 1.25rem;
            }
        }

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

        .content {
            animation: fadeIn 0.6s ease-out forwards;
        }

        /* 工具类 */
        .text-center {
            text-align: center;
        }
        
        .mt-1 { margin-top: 0.5rem; }
        .mt-2 { margin-top: 1rem; }
        .mt-3 { margin-top: 1.5rem; }
        .mt-4 { margin-top: 2rem; }
        .mt-5 { margin-top: 3rem; }
        
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        .mb-5 { margin-bottom: 3rem; }