/* ===== 公共CSS ===== */
        :root {
            --primary-color: #1a5f7a;
            --secondary-color: #159895;
            --accent-color: #57c5b6;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --text-color: #333;
            --text-light: #6c757d;
            --white: #ffffff;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--white);
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        ul {
            list-style: none;
        }

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }

        .section {
            padding: 80px 0;
            position: relative;
        }

        .section-title {
            text-align: center;
            margin-bottom: 50px;
            position: relative;
        }

        .section-title h2 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-title h2::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 3px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 3px;
        }

        .section-title p {
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto;
        }

        .btn {
            display: inline-block;
            padding: 12px 30px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            color: var(--white);
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(26, 95, 122, 0.3);
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(to right, var(--secondary-color), var(--accent-color));
            transition: var(--transition);
            z-index: -1;
        }

        .btn:hover::before {
            left: 0;
        }

        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(26, 95, 122, 0.4);
        }

        /* 动态背景元素 */
        .bg-element {
            position: absolute;
            border-radius: 50%;
            opacity: 0.1;
            z-index: -1;
            animation: float 6s ease-in-out infinite;
        }

        .bg-element-1 {
            width: 150px;
            height: 150px;
            background: var(--primary-color);
            top: 10%;
            left: 5%;
            animation-delay: 0s;
        }

        .bg-element-2 {
            width: 100px;
            height: 100px;
            background: var(--secondary-color);
            top: 20%;
            right: 10%;
            animation-delay: 2s;
        }

        .bg-element-3 {
            width: 120px;
            height: 120px;
            background: var(--accent-color);
            bottom: 15%;
            left: 8%;
            animation-delay: 4s;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(10deg); }
        }

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

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

        .logo {
            display: flex;
            align-items: center;
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-size: 200% 100%;
            animation: gradientShift 3s ease infinite;
        }

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

        .logo i {
            margin-right: 10px;
            font-size: 2rem;
        }

        .nav-menu {
            display: flex;
        }

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

        .nav-menu a {
            font-weight: 600;
            position: relative;
            padding: 5px 0;
            transition: var(--transition);
        }

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

        .nav-menu a:hover {
            color: var(--secondary-color);
        }

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

        .contact-phone {
            display: flex;
            align-items: center;
            font-weight: 700;
            color: var(--primary-color);
            font-size: 1.1rem;
            animation: pulsePhone 2s infinite;
        }

        @keyframes pulsePhone {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.05); }
        }

        .contact-phone i {
            margin-right: 8px;
            color: var(--secondary-color);
        }

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

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

        .footer-container {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-bottom: 40px;
        }

        .footer-col h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h3::after {
            content: '';
            position: absolute;
            width: 40px;
            height: 2px;
            background-color: var(--accent-color);
            bottom: 0;
            left: 0;
        }

        .footer-col p, .footer-col a {
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 10px;
            display: block;
            transition: var(--transition);
        }

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

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

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

        .qrcode {
            text-align: center;
        }

        .qrcode img {
            max-width: 150px;
            margin: 0 auto 10px;
            border-radius: 8px;
            animation: float 4s ease-in-out infinite;
        }

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

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

        .friend-links a {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
        }

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