:root {
            --primary: #2563eb;
            --secondary: #3b82f6;
            --accent: #8b5cf6;
            --dark: #1e293b;
            --light: #f8fafc;
            --gray: #94a3b8;
            --card-bg: rgba(255, 255, 255, 0.05);
            --transition: all 0.3s ease;
        }
        
        /* 基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #0f172a, #1e293b);
            color: var(--light);
            line-height: 1.6;
            overflow-x: hidden;
        }
        
        /* 导航栏 */
        #navbar {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(30, 41, 59, 0.95);
            padding: 20px 5%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            z-index: 1000;
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(59, 130, 246, 0.3);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--light);
            text-decoration: none;
        }
        
        .logo span {
            color: var(--accent);
        }
        
        .nav-links {
            display: flex;
            gap: 30px;
        }
        
        .nav-links a {
            color: var(--light);
            text-decoration: none;
            font-weight: 500;
            font-size: 1.1rem;
            transition: var(--transition);
            padding: 8px 15px;
            border-radius: 30px;
        }
        
        .nav-links a:hover {
            background: rgba(59, 130, 246, 0.2);
            transform: translateY(-3px);
        }
        
        /* 欢迎区域 */
        #welcome-section {
            height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            padding: 0 20px;
            position: relative;
            overflow: hidden;
        }
        
        #welcome-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
            z-index: -1;
        }
        
        .welcome-content {
            max-width: 800px;
        }
        
        #welcome-section h1 {
            font-size: 4rem;
            margin-bottom: 20px;
            background: linear-gradient(90deg, var(--accent), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 0 20px rgba(139, 92, 246, 0.2);
        }
        
        #welcome-section p {
            font-size: 1.5rem;
            color: var(--gray);
            margin-bottom: 40px;
            line-height: 1.8;
        }
        
        .btn {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent), var(--primary));
            color: white;
            padding: 15px 40px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.2rem;
            transition: var(--transition);
            box-shadow: 0 5px 15px rgba(139, 92, 246, 0.4);
        }
        
        .btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(139, 92, 246, 0.6);
        }
        
        /* 项目区域 */
        #projects-section {
            padding: 100px 5%;
            background: rgba(15, 23, 42, 0.7);
        }
        
        .section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 70px;
            color: var(--light);
            position: relative;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--secondary));
            border-radius: 2px;
        }
        
        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 40px;
        }
        
        .project-tile {
            background: var(--card-bg);
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            transition: var(--transition);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(59, 130, 246, 0.1);
        }
        
        .project-tile:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(59, 130, 246, 0.4);
        }
        
        .project-image {
            width: 100%;
            height: 250px;
            object-fit: cover;
            border-bottom: 3px solid var(--accent);
        }
        
        .project-content {
            padding: 25px;
        }
        
        .project-title {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--light);
        }
        
        .project-description {
            color: var(--gray);
            margin-bottom: 20px;
            line-height: 1.7;
        }
        
        .project-link {
            display: inline-block;
            color: var(--secondary);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .project-link:hover {
            color: var(--accent);
            transform: translateX(5px);
        }
        
        /* 技能部分 */
        .skills-section {
            padding: 100px 5%;
            background: rgba(15, 23, 42, 0.5);
        }
        
        .skills-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .skill-category {
            background: var(--card-bg);
            border-radius: 15px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(59, 130, 246, 0.1);
        }
        
        .skill-category h3 {
            font-size: 1.5rem;
            margin-bottom: 25px;
            color: var(--light);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .skill-category i {
            color: var(--accent);
            font-size: 1.8rem;
        }
        
        .skill-list {
            list-style: none;
        }
        
        .skill-list li {
            margin-bottom: 15px;
            padding-left: 10px;
            border-left: 3px solid var(--secondary);
            color: var(--gray);
            font-size: 1.1rem;
        }
        
        /* 联系部分 */
        .contact-section {
            padding: 100px 5%;
            text-align: center;
            background: rgba(15, 23, 42, 0.3);
        }
        
        .contact-section p {
            font-size: 1.2rem;
            color: var(--gray);
            max-width: 700px;
            margin: 0 auto 40px;
            line-height: 1.8;
        }
        
        .social-links {
            display: flex;
            justify-content: center;
            gap: 25px;
            margin-bottom: 40px;
        }
        
        .social-link {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 60px;
            height: 60px;
            background: var(--card-bg);
            border-radius: 50%;
            color: var(--light);
            font-size: 1.8rem;
            text-decoration: none;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        
        .social-link:hover {
            transform: translateY(-8px);
            background: var(--accent);
            box-shadow: 0 10px 20px rgba(139, 92, 246, 0.4);
        }
        
        #profile-link {
            display: inline-block;
            margin-top: 20px;
            color: var(--secondary);
            font-size: 1.2rem;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        
        #profile-link:hover {
            color: var(--accent);
        }
        
        /* 页脚 */
        footer {
            text-align: center;
            padding: 30px;
            border-top: 1px solid rgba(59, 130, 246, 0.1);
            color: var(--gray);
            font-size: 1rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 900px) {
            #welcome-section h1 {
                font-size: 3rem;
            }
            
            #welcome-section p {
                font-size: 1.3rem;
            }
            
            .nav-links {
                gap: 15px;
            }
            
            .nav-links a {
                padding: 8px 12px;
                font-size: 1rem;
            }
        }
        
        @media (max-width: 768px) {
            #navbar {
                flex-direction: column;
                padding: 15px;
            }
            
            .nav-links {
                margin-top: 15px;
                flex-wrap: wrap;
                justify-content: center;
            }
            
            #welcome-section h1 {
                font-size: 2.5rem;
            }
            
            .projects-grid {
                grid-template-columns: 1fr;
            }
            
            .section-title {
                font-size: 2rem;
            }
        }
        
        @media (max-width: 480px) {
            #welcome-section h1 {
                font-size: 2rem;
            }
            
            #welcome-section p {
                font-size: 1.1rem;
            }
            
            .btn {
                padding: 12px 30px;
                font-size: 1rem;
            }
            
            .social-links {
                gap: 15px;
            }
            
            .social-link {
                width: 50px;
                height: 50px;
                font-size: 1.5rem;
            }
        }