/* ====== 变量定义 ====== */
        :root {
            --primary-color: #0A2463;
            --secondary-color: #3E92CC;
            --accent-color: #FF6B6B;
            --accent-gradient: linear-gradient(135deg, #FF6B6B, #FF8E53);
            --dark-bg: #121212;
            --light-bg: #F8F9FA;
            --card-bg: #FFFFFF;
            --text-primary: #333333;
            --text-secondary: #666666;
            --border-color: #E0E0E0;
            --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        /* ====== 重置与基础样式 ====== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: 'Inter', sans-serif;
            color: var(--text-primary);
            line-height: 1.7;
            background-color: #FAFAFA;
            overflow-x: hidden;
        }

        h1, h2, h3, h4, h5 {
            font-family: 'Poppins', sans-serif;
            font-weight: 600;
            line-height: 1.3;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        ul {
            list-style: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

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

        .section-title {
            text-align: center;
            margin-bottom: 70px;
            position: relative;
        }

        .section-title h2 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--accent-gradient);
            border-radius: 2px;
        }

        .section-title p {
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 25px auto 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            background: var(--accent-gradient);
            color: white;
            border-radius: var(--radius-md);
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            font-size: 1rem;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #FF8E53, #FF6B6B);
            z-index: -1;
            opacity: 0;
            transition: var(--transition);
        }

        .btn:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }

        .btn:hover::before {
            opacity: 1;
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--secondary-color);
            color: var(--secondary-color);
        }

        .btn-outline:hover {
            background: var(--secondary-color);
            color: white;
        }

        .btn-phone {
            background: linear-gradient(135deg, #25D366, #128C7E);
            padding: 12px 35px;
            border-radius: 50px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            min-width: 220px;
            justify-content: center;
        }

        .btn-phone:hover {
            background: linear-gradient(135deg, #128C7E, #25D366);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(37, 211, 102, 0.2);
        }

        /* ====== 导航栏 ====== */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            padding: 20px 0;
            transition: var(--transition);
        }

        header.scrolled {
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(10px);
            box-shadow: var(--shadow-md);
            padding: 15px 0;
        }

        header:not(.scrolled) .nav-links a {
            color: white;
        }
        
        header:not(.scrolled) .nav-links a:hover {
            color: var(--accent-color);
        }
        
        header:not(.scrolled) .mobile-menu-btn {
            color: white;
        }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-family: 'Poppins', sans-serif;
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            display: flex;
            align-items: center;
            gap: 8px;
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, #FF6B6B, #FF8E53, #3E92CC, #0A2463);
            background-size: 300% 300%;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            animation: gradientMove 8s ease infinite;
        }

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

        header.scrolled .logo {
            color: var(--primary-color);
            background: linear-gradient(135deg, #0A2463, #3E92CC);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            animation: gradientMove 6s ease infinite;
        }

        .logo span {
            color: var(--accent-color);
        }

        .nav-links {
            display: flex;
            gap: 35px;
            align-items: center;
        }

        .nav-links a {
            font-weight: 500;
            position: relative;
            padding: 5px 0;
            transition: var(--transition);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-gradient);
            transition: var(--transition);
        }

        .nav-links a:hover {
            color: var(--accent-color);
        }

        .nav-links a:hover::after {
            width: 100%;
        }

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

        /* ====== 页脚 ====== */
        footer {
            background-color: var(--dark-bg);
            color: white;
            padding: 80px 0 30px;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 60px;
        }

        .footer-column h4 {
            font-size: 1.3rem;
            margin-bottom: 25px;
            color: white;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-column h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--accent-gradient);
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            color: #B0B7C3;
            transition: var(--transition);
        }

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

        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .contact-item i {
            color: var(--accent-color);
            width: 20px;
        }

        .qrcode-container {
            margin-top: 20px;
            text-align: center;
        }

        .qrcode {
            width: 130px;
            height: 130px;
            background: white;
            padding: 10px;
            border-radius: var(--radius-md);
            margin: 0 auto 10px;
        }

        .qrcode img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        .qrcode-text {
            font-size: 0.9rem;
            color: #B0B7C3;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 30px;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .copyright {
            color: #B0B7C3;
            font-size: 0.9rem;
            text-align: center;
        }

        .copyright p {
            margin-bottom: 10px;
        }

        .footer-logo {
            font-family: 'Poppins', sans-serif;
            font-size: 1.5rem;
            font-weight: 700;
            color: white;
            text-align: center;
            margin-bottom: 20px;
        }

        .footer-logo span {
            color: var(--accent-color);
        }

        .footer-links-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
            margin-top: 20px;
        }

        .footer-links-bottom a {
            color: #B0B7C3;
            transition: var(--transition);
        }

        .footer-links-bottom a:hover {
            color: var(--accent-color);
        }

        /* ====== 动画类 ====== */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ====== 公共响应式设计 ====== */
        @media (max-width: 992px) {
            .nav-links {
                display: none;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 80px 0;
            }
            
            .section-title h2 {
                font-size: 2.2rem;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            
            .footer-links-bottom {
                flex-direction: column;
                align-items: center;
                gap: 10px;
            }
        }

        @media (max-width: 576px) {
            .section {
                padding: 60px 0;
            }
            
            .btn-phone {
                min-width: 200px;
                padding: 12px 25px;
            }
        }