:root {
            --primary: #0066ff;
            --secondary: #ff6600;
            --accent: #00cc99;
            --dark: #1a1a2e;
            --light: #f8f9fa;
            --gradient: linear-gradient(135deg, var(--primary), var(--accent));
            --gradient-secondary: linear-gradient(135deg, var(--secondary), #ff9966);
            --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Poppins', 'Segoe UI', sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--light);
            color: #333;
            overflow-x: hidden;
            line-height: 1.6;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        section {
            padding: 100px 0;
            position: relative;
        }

        /* 导航栏 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
            transition: var(--transition);
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }

        .logo {
            display: flex;
            align-items: center;
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--dark);
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent), var(--primary));
            background-size: 300% 100%;
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            animation: logoColorShift 5s infinite linear;
        }

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

        nav ul {
            display: flex;
            list-style: none;
        }

        nav ul li {
            margin-left: 30px;
            position: relative;
        }

        nav ul li a {
            font-weight: 600;
            color: var(--dark);
            transition: var(--transition);
            position: relative;
            padding: 5px 0;
        }

        nav ul li a:hover {
            color: var(--primary);
        }

        .contact-number {
            background: var(--gradient-secondary);
            color: white;
            padding: 10px 20px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 5px 15px rgba(255, 102, 0, 0.3);
        }

        .contact-number:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(255, 102, 0, 0.4);
        }

        .mobile-menu {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark);
        }

        /* 底部 */
        footer {
            background: var(--dark);
            color: white;
            padding: 80px 0 20px;
        }

        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            margin-bottom: 50px;
        }

        .footer-section {
            flex: 1;
            min-width: 250px;
            margin-bottom: 30px;
            padding-right: 20px;
        }

        .footer-section h3 {
            font-size: 1.4rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-section h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: var(--gradient);
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links li a {
            transition: var(--transition);
            color: #ccc;
        }

        .footer-links li a:hover {
            color: white;
            padding-left: 5px;
        }

        .contact-info li {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
            color: #ccc;
        }

        .contact-info li i {
            margin-right: 15px;
            color: var(--accent);
            width: 20px;
        }

        .qr-code {
            text-align: center;
        }

        .qr-code img {
            max-width: 150px;
            border-radius: 10px;
            margin-bottom: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 30px;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .friend-links a {
            color: #ccc;
            transition: var(--transition);
        }

        .friend-links a:hover {
            color: white;
        }

        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #999;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .nav-container {
                flex-direction: column;
                padding: 15px 0;
            }
            
            nav {
                margin: 20px 0;
            }
            
            nav ul {
                flex-wrap: wrap;
                justify-content: center;
            }
            
            nav ul li {
                margin: 0 15px 10px;
            }
            
            .section {
                padding: 70px 0;
            }
            
            .footer-section {
                min-width: 100%;
                margin-bottom: 40px;
            }
        }

        @media (max-width: 576px) {
            .mobile-menu {
                display: block;
                position: absolute;
                top: 25px;
                right: 20px;
            }
            
            nav {
                display: none;
                width: 100%;
            }
            
            nav.active {
                display: block;
            }
            
            nav ul {
                flex-direction: column;
                align-items: center;
            }
            
            nav ul li {
                margin: 10px 0;
            }
        }