/* 公共CSS - 导航与底部 */
        :root {
            --primary: #0052FF;
            --secondary: #00C9FF;
            --accent: #FF6B6B;
            --light: #F0F7FF;
            --dark: #1A1A2E;
            --success: #00D26A;
            --text: #333333;
            --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        section {
            padding: 100px 0;
        }

        /* 导航栏样式 */
        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, 82, 255, 0.1);
            transition: var(--transition);
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }

        .logo {
            display: flex;
            align-items: center;
            position: relative;
        }

        .logo-text {
            font-size: 28px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            position: relative;
            padding: 5px 10px;
            animation: logoColorShift 5s infinite alternate;
        }

        @keyframes logoColorShift {
            0% { filter: hue-rotate(0deg); }
            100% { filter: hue-rotate(45deg); }
        }

        .logo-text::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 10%;
            width: 80%;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            animation: logoLine 2s infinite;
        }

        @keyframes logoLine {
            0% { transform: scaleX(0); opacity: 0; }
            50% { transform: scaleX(1); opacity: 1; }
            100% { transform: scaleX(0); opacity: 0; }
        }

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

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

        nav ul li a {
            color: var(--dark);
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            padding: 8px 0;
            position: relative;
            transition: var(--transition);
        }

        nav ul li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            transition: var(--transition);
            border-radius: 3px;
        }

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

        nav ul li a:hover::after {
            width: 100%;
        }

        .nav-phone {
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            padding: 10px 20px;
            border-radius: 50px;
            color: white;
            font-weight: 700;
            box-shadow: 0 5px 15px rgba(0, 82, 255, 0.3);
            transition: var(--transition);
            animation: phonePulse 2s infinite;
        }

        @keyframes phonePulse {
            0% { box-shadow: 0 5px 15px rgba(0, 82, 255, 0.3); }
            50% { box-shadow: 0 5px 25px rgba(0, 82, 255, 0.5); }
            100% { box-shadow: 0 5px 15px rgba(0, 82, 255, 0.3); }
        }

        .nav-phone:hover {
            transform: translateY(-3px);
        }

        .nav-phone i {
            margin-right: 10px;
            font-size: 18px;
        }

        .mobile-menu-btn {
            display: none;
            color: var(--primary);
            font-size: 24px;
            cursor: pointer;
        }

        /* 底部样式 */
        footer {
            background: var(--dark);
            color: white;
            padding: 60px 0 20px;
        }

        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            margin-bottom: 40px;
        }

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

        .footer-column h3 {
            font-size: 20px;
            margin-bottom: 20px;
            color: var(--secondary);
            position: relative;
            padding-bottom: 10px;
        }

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

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }

        .contact-info {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
        }

        .contact-info i {
            margin-right: 10px;
            color: var(--secondary);
        }

        .qrcode {
            width: 120px;
            height: 120px;
            background: white;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            margin-top: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        .qrcode img {
            width: 100%;
            height: 100%; }

        .qrcode span {
            color: var(--dark);
            font-weight: 600;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 10px;
        }

        .friend-links a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
        }

        .friend-links a:hover {
            color: var(--secondary);
        }

        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 14px;
            color: #aaa;
        }

        /* 响应式设计 */
        @media (max-width: 992px) {
            .nav-container {
                padding: 10px 0;
            }

            nav ul {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: white;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
                border-radius: 0 0 20px 20px;
            }

            nav ul.active {
                display: flex;
            }

            nav ul li {
                margin: 10px 0;
            }

            .mobile-menu-btn {
                display: block;
            }

            .nav-phone {
                font-size: 16px;
                padding: 8px 16px;
            }
        }

        @media (max-width: 768px) {
            section {
                padding: 70px 0;
            }

            .footer-column {
                flex: 100%;
                padding-right: 0;
            }
        }