.main-nav {
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .brand-logo {
            font-size: 24px;
            font-weight: 700;
            color: #111;
            text-decoration: none;
            letter-spacing: 0.5px;
        }

        /* 页面头部横幅 */
        .page-banner {
            background: #0938A6;
            color: #fff;
            padding: 160px 0;
            text-align: center;
        }

        .page-banner h1 {
            font-size: 40px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .page-banner p {
            font-size: 17px;
            opacity: 0.9;
            max-width: 700px;
            margin: 0 auto;
        }

        /* 主体内容区 */
        .contact-wrap {
            padding: 60px 0;
        }

        .contact-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            margin-bottom: 60px;
        }

        .contact-block {
            background: #f8f9fa;
            padding: 36px;
            border-radius: 6px;
        }

        .block-title {
            font-size: 26px;
            font-weight: 600;
            color: #0938A6;
            margin-bottom: 20px;
            padding-bottom: 12px;
            position: relative;
        }

        .block-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 60px;
            height: 3px;
            background: #FFAB13;
        }

        /* 联系信息 */
        .contact-info p {
            margin-bottom: 14px;
            font-size: 16px;
        }

        .contact-info strong {
            color: #111;
        }

        /* 表单样式 */
        .form-group {
            margin-bottom: 18px;
        }

        label {
            display: block;
            margin-bottom: 6px;
            font-weight: 500;
            font-size: 15px;
        }

        input, select, textarea {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-family: inherit;
            font-size: 15px;
            background: #fff;
        }

        textarea {
            min-height: 120px;
            resize: vertical;
        }

        .btn-submit {
            background: #0938A6;
            color: #fff;
            border: none;
            padding: 13px 32px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 4px;
            cursor: pointer;
            transition: background 0.3s;
        }

        .btn-submit:hover {
            background: #072d85;
        }

        /* 业务分类 & 资讯区块 */
        .grid-section {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 40px;
        }

        .grid-card {
            background: #f8f9fa;
            padding: 28px;
            border-radius: 6px;
        }

        .grid-card h3 {
            font-size: 20px;
            color: #111;
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid #FFAB13;
            display: inline-block;
        }

        .grid-card ul {
            list-style: none;
        }

        .grid-card li {
            padding: 6px 0;
            font-size: 15px;
            color: #444;
        }

        /* 页脚 */
        .site-footer {
            background: #1a1a1a;
            color: #ccc;
            padding: 30px 0;
            text-align: center;
            font-size: 14px;
            margin-top: 20px;
        }

        /* 响应式适配 */
        @media (max-width: 992px) {
            .grid-section {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .contact-row {
                grid-template-columns: 1fr;
            }
            .grid-section {
                grid-template-columns: 1fr;
            }
            .page-banner h1 {
                font-size: 32px;
            }
            .contact-block, .grid-card {
                padding: 24px;
            }
        }
       
        
        .navbar {
            transition: all 0.3s ease;
            background-color: var(--white);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
        }
        
        .navbar .nav-link {
            color: var(--dark-gray);
            position: relative;
            padding-bottom: 8px;
        }
        
        .navbar .logo-text {
            color: var(--dark-gray);
            transform: scale(0.8);
        }
        
        .navbar .logo-img {
            transform: scale(0.8);
        }
        
        .navbar .menu-toggle-icon {
            color: var(--dark-gray);
        }
        
        .navbar .nav-link:hover {
            color: var(--secondary-color);
        }
        
        .navbar .nav-link.active {
            color: var(--secondary-color);
        }
        
        /* Add triangle indicator for active nav links before scroll */
        .navbar:not(.scrolled) .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 0;
            border-left: 8px solid transparent;
            border-right: 8px solid transparent;
            border-bottom: 8px solid white;
        }
        
        /* Keep orange line for scrolled navbar */
        .navbar.scrolled .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--secondary-color);
        }