:root {
            /* 优化后的颜色方案 - 更明亮清爽 */
            --primary-color: #0A6EBD; /* 主色调：明亮的蓝色 */
            --primary-light: #E8F4FC; /* 主色浅色背景 */
            --secondary-color: #FF9900; /* 保持橙色作为强调色 */
            --secondary-light: #FFF4E5; /* 橙色浅色背景 */
            --light-bg: #F9FAFB; /* 更明亮的背景色 */
            --text-dark: #2D3748; /* 文本深色 */
            --text-gray: #4A5568; /* 文本灰色（稍浅） */
            --white: #FFFFFF;
            --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
            --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
            --office-blue: #0A6EBD;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Inter', 'system-ui', -apple-system, BlinkMacSystemFont, sans-serif;
            color: var(--text-dark);
            background-color: var(--light-bg);
            line-height: 1.6;
        }

        a {
            text-decoration: none;
            color: inherit;
        }
        
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        section {
            padding: 5rem 0;
        }

        /* 导航栏 - 颜色更明亮 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: rgba(10, 110, 189, 0.95); /* 主色更明亮 */
            backdrop-filter: blur(8px);
            color: var(--white);
            box-shadow: var(--card-shadow);
            z-index: 1000;
            transition: all 0.3s ease;
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
            max-width: 1280px;
            margin: 0 auto;
        }

        .nav-title {
            font-size: 1.25rem;
            font-weight: bold;
            letter-spacing: -0.025em;
        }
        
        #menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--white);
            font-size: 1.5rem;
            cursor: pointer;
            outline: none;
        }
        
        /* 桌面端导航 */
        .desktop-nav {
            display: flex;
            align-items: center;
            column-gap: 2rem;
        }
        
        .desktop-nav a {
            transition: all 0.3s ease;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }
        
        .desktop-nav a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: width 0.3s ease;
        }
        
        .desktop-nav a:hover:after {
            width: 100%;
        }

        .desktop-nav a:hover {
            color: var(--secondary-color);
        }
        
        /* 移动端导航菜单 */
        #mobile-menu {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            height: calc(100vh - 70px);
            background-color: rgba(10, 110, 189, 0.98);
            backdrop-filter: blur(12px);
            z-index: 900;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 2rem 0;
            transform: translateY(-120%);
            transition: transform 0.4s ease;
        }
        
        #mobile-menu.open {
            transform: translateY(0);
        }
        
        #mobile-menu a {
            padding: 1.2rem 0;
            font-size: 1.2rem;
            font-weight: 500;
            position: relative;
            transition: all 0.3s ease;
            width: 100%;
            text-align: center;
        }
        
        #mobile-menu a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: width 0.3s ease;
        }
        
        #mobile-menu a:hover:after {
            width: 40px;
        }
        
        #mobile-menu a:hover {
            color: var(--secondary-color);
        }

        /* 英雄区域 - 渐变更明亮 */
        .hero-section {
            position: relative;
            padding-top: 7rem;
            overflow: hidden;
            background: linear-gradient(135deg, #1E88E5, #42A5F5); /* 更明亮的蓝色渐变 */
            color: var(--white);
        }
        
        .hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0.1; /* 略微提高透明度，更明亮 */
        }
        
        .hero-bg span {
            position: absolute;
            border-radius: 50%;
            background-color: var(--white);
        }
        
        .bg-circle-1 {
            top: 20%;
            left: 5%;
            width: 300px;
            height: 300px;
        }
        
        .bg-circle-2 {
            bottom: 20%;
            right: 5%;
            width: 250px;
            height: 250px;
        }
        
        .hero-container {
            position: relative;
            padding: 4rem 0;
        }
        
        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .hero-title {
            font-size: clamp(2.5rem, 6vw, 3.75rem);
            font-weight: 800;
            margin-bottom: 1.5rem;
            line-height: 1.15;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15); /* 阴影更浅 */
        }

        .hero-description {
            font-size: clamp(1.1rem, 2.5vw, 1.3rem);
            opacity: 0.95; /* 提高不透明度，更清晰 */
            margin-bottom: 2.5rem;
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1.2rem;
        }

        .hero-button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.85rem 2rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        
        .hero-button i {
            margin-left: 8px;
            font-size: 0.9em;
            transition: transform 0.3s ease;
        }

        .hero-button:hover i {
            transform: translateX(4px);
        }

        .hero-button-primary {
            background-color: var(--secondary-color);
            color: var(--white);
        }

        .hero-button-primary:hover {
            background-color: rgba(255, 153, 0, 0.92);
            transform: translateY(-3px);
            box-shadow: 0 8px 15px rgba(255, 153, 0, 0.25); /* 阴影更浅 */
        }

        .hero-button-secondary {
            background-color: rgba(255, 255, 255, 0.15); /* 背景更透明 */
            color: var(--white);
            border: 1px solid rgba(255, 255, 255, 0.4);
            backdrop-filter: blur(8px);
        }

        .hero-button-secondary:hover {
            background-color: rgba(255, 255, 255, 0.25);
            transform: translateY(-3px);
            border-color: rgba(255, 255, 255, 0.6);
        }

        /* 标题通用样式 */
        .section-title {
            font-size: clamp(1.75rem, 4vw, 2.5rem);
            font-weight: 700;
            color: var(--primary-color); /* 标题使用主色，更协调 */
            margin-bottom: 1rem;
            text-align: center;
            position: relative;
            padding-bottom: 1.2rem;
        }
        
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            border-radius: 2px;
        }
        
        .section-subtitle {
            color: var(--text-gray);
            max-width: 700px;
            margin: 0 auto 3rem;
            text-align: center;
            font-size: 1.1rem;
            line-height: 1.7;
        }

        /* 服务内容 - 优化后样式 */
        .service-section {
            background-color: var(--light-bg);
        }
        
        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.75rem;
        }
        
        .service-card {
            background-color: var(--white);
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: all 0.4s ease;
            transform: translateY(0);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        
        .service-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-10px);
        }
        
        .card-content {
            padding: 1.75rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        
        /* 服务标题与图标组合样式 */
        .service-header {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1rem;
        }
        
        .service-card .icon-wrapper {
            background-color: var(--primary-light); /* 使用主色浅色背景 */
            width: 50px;
            height: 50px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        
        .service-card .icon-wrapper i {
            color: var(--primary-color);
            font-size: 1.5rem;
        }
        
        .service-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary-color);
            margin: 0;
        }
        
        .service-card p {
            color: var(--text-gray);
            margin-bottom: 1.5rem;
            font-size: 1.02rem;
            flex-grow: 1;
        }
        
        .service-card .card-action {
            display: inline-flex;
            align-items: center;
            color: #1976D2; /* 更明亮的蓝色链接 */
            font-weight: 600;
            transition: all 0.3s ease;
        }
        
        .service-card .card-action i {
            margin-left: 6px;
            font-size: 0.9rem;
            transition: transform 0.3s ease;
        }
        
        .service-card:hover .card-action i {
            transform: translateX(5px);
        }
        
        .service-card .card-action:hover {
            color: var(--secondary-color);
        }

        /* 常见问题 */
        .faq-section {
            background-color: var(--white);
        }
        
        .faq-list {
            max-width: 850px;
            margin: 0 auto;
        }
        
        .faq-item {
            border: 1px solid #EDF2F7;
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: 1.5rem;
            transition: all 0.3s ease;
        }
        
        .faq-item.open {
            border-color: var(--primary-color); /* 使用主色边框 */
            box-shadow: 0 4px 12px rgba(10, 110, 189, 0.1); /* 主色阴影 */
        }
        
        .faq-item:last-child {
            margin-bottom: 0;
        }
        
        .faq-toggle {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;

            padding: 1.4rem;
            background-color: #F7FAFC; /* 更浅的背景 */
            transition: background-color 0.3s ease;
            cursor: pointer;
            border: none;
            text-align: left;
            font: inherit;
            font-weight: 600;
            font-size: 1.1rem;
        }
        
        .faq-item.open .faq-toggle {
            background-color: var(--primary-light); /* 主色浅色背景 */
            color: var(--primary-color);
        }
        
        .faq-toggle i {
            color: var(--text-gray);
            transition: all 0.3s ease;
        }
        
        .faq-item.open .faq-toggle i {
            transform: rotate(180deg);
            color: var(--primary-color); /* 主色图标 */
        }
        
        .faq-content {
            overflow: hidden;
            max-height: 0;
            transition: max-height 0.5s ease;
        }
        
        .faq-item.open .faq-content {
            max-height: 500px;
        }
        
        .faq-answer {
            padding: 1.4rem;
            background-color: var(--white);
            color: var(--text-gray);
            line-height: 1.7;
        }
        
        .faq-answer p {
            margin-bottom: 0;
        }

        /* 联系方式区域 - 颜色更明亮 */
        .contact-section {
            background-color: var(--primary-color);
            color: var(--white);
            padding: 5rem 0;
        }
        
        .contact-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2.5rem;
            margin-top: 3rem;
        }
        
        .contact-card {
            background: rgba(255, 255, 255, 0.12); /* 更透明的背景 */
            backdrop-filter: blur(10px);
            border-radius: 12px;
            padding: 2rem;
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: all 0.3s ease;
        }
        
        .contact-card:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-8px);
        }
        
        .contact-icon {
            width: 60px;
            height: 60px;
            border-radius: 12px;
            background-color: rgba(255, 255, 255, 0.2); /* 更浅的背景 */
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            font-size: 1.8rem;
            color: var(--secondary-color);
        }
        
        .contact-card h3 {
            font-size: 1.4rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }
        
        .contact-info {
            font-size: 1.1rem;
            line-height: 1.8;
        }
        
        .contact-info a {
            display: block;
            transition: all 0.2s ease;
        }
        
        .contact-info a:hover {
            color: var(--secondary-color);
            transform: translateX(5px);
        }
        
        /* 办公地址卡片 */
        .office-card {
            background-color: var(--office-blue);
            border-radius: 8px;
            padding: 2rem;
            color: var(--white);
            display: flex;
            flex-direction: column;
            position: relative;
            overflow: hidden;
        }
        
        .office-icon {
            position: absolute;
            top: 1.5rem;
            left: 1.5rem;
            width: 40px;
            height: 40px;
            background-color: var(--secondary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .office-content {
            padding-left: 60px;
        }
        
        .office-content h3 {
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            color: var(--white);
            font-weight: 600;
        }
        
        .office-content p {
            line-height: 1.8;
            margin-bottom: 0.5rem;
        }

        /* 页脚 - 颜色更浅 */
        .footer {
            background-color: #1A365D; /* 深蓝色但更浅 */
            color: #E2E8F0; /* 文本更亮 */
            padding: 2.5rem 0;
            font-size: 0.95rem;
        }
        
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 1.5rem;
        }
        
        .footer-logo {
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            font-weight: 700;
            font-size: 1.2rem;
        }
        
        .footer-links {
            display: flex;
            gap: 1.5rem;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
            justify-content: center;
        }
        
        .footer-links a:hover {
            color: var(--secondary-color);
        }
        
        .copyright {
            opacity: 0.8; /* 提高不透明度，更清晰 */
        }

        /* 响应式媒体查询 */
        @media (max-width: 768px) {
            #menu-toggle {
                display: block;
            }
            
            .desktop-nav {
                display: none;
            }
            
            .hero-container {
                padding: 3rem 0;
            }
            
            section {
                padding: 3.5rem 0;
            }
            
            .hero-buttons {
                flex-direction: column;
                gap: 1rem;
            }
            
            .hero-button {
                width: 100%;
                max-width: 300px;
                margin: 0 auto;
            }
            
            .contact-grid {
                grid-template-columns: 1fr;
            }
            
            .office-card {
                padding: 1.5rem;
            }
            
            .office-icon {
                width: 35px;
                height: 35px;
            }
            
            .office-content {
                padding-left: 50px;
            }
        }
        
        @media (max-width: 480px) {
            .nav-container {
                padding: 0.8rem;
            }
            
            .section-title:after {
                width: 60px;
            }
            
            .office-content h3 {
                font-size: 1.2rem;
            }
        }