/* ========== 独享部分样式 - 关于我们页面特有 ========== */
        .about-hero {
            background: linear-gradient(135deg, #1a3a8f 0%, #2a5bd7 100%);
            color: white;
            padding: 80px 0 60px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .about-hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600" opacity="0.1"><path d="M0,0 L1200,600 L0,600 Z" fill="white"/></svg>');
            background-size: cover;
        }
        
        .brand-name {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 2px;
            position: relative;
            display: inline-block;
        }
        
        .brand-name::after {
            content: "";
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: #ffcc00;
            border-radius: 2px;
        }
        
        .brand-slogan {
            font-size: 1.8rem;
            font-weight: 300;
            margin-top: 25px;
            opacity: 0.9;
        }
        
        .section-title {
            font-size: 2.2rem;
            color: #1a3a8f;
            margin: 60px 0 30px;
            padding-bottom: 15px;
            border-bottom: 2px solid #eaeaea;
            position: relative;
        }
        
        .section-title::after {
            content: "";
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 80px;
            height: 2px;
            background-color: #ffcc00;
        }
        
        .overview-content {
            font-size: 1.1rem;
            line-height: 1.8;
            margin-bottom: 30px;
            color: #555;
        }
        
        .highlight-text {
            color: #1a3a8f;
            font-weight: 600;
        }
        
        /* 发展历程时间线特效 */
        .timeline {
            position: relative;
            max-width: 900px;
            margin: 50px auto;
        }
        
        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 3px;
            background: #1a3a8f;
            transform: translateX(-50%);
        }
        
        .timeline-item {
            position: relative;
            margin-bottom: 50px;
            width: 45%;
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s ease;
        }
        
        .timeline-item.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
            padding-right: 60px;
        }
        
        .timeline-item:nth-child(even) {
            left: 55%;
            padding-left: 60px;
        }
        
        .timeline-year {
            background-color: #1a3a8f;
            color: white;
            padding: 8px 20px;
            border-radius: 20px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 10px;
            box-shadow: 0 4px 10px rgba(26, 58, 143, 0.3);
        }
        
        .timeline-content {
            background-color: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            position: relative;
        }
        
        .timeline-item:nth-child(odd) .timeline-content::after {
            content: '';
            position: absolute;
            right: -15px;
            top: 20px;
            width: 0;
            height: 0;
            border-top: 15px solid transparent;
            border-bottom: 15px solid transparent;
            border-left: 15px solid white;
        }
        
        .timeline-item:nth-child(even) .timeline-content::after {
            content: '';
            position: absolute;
            left: -15px;
            top: 20px;
            width: 0;
            height: 0;
            border-top: 15px solid transparent;
            border-bottom: 15px solid transparent;
            border-right: 15px solid white;
        }
        
        .timeline-dot {
            position: absolute;
            top: 0;
            width: 20px;
            height: 20px;
            background-color: #ffcc00;
            border-radius: 50%;
            border: 4px solid #1a3a8f;
            z-index: 1;
        }
        
        .timeline-item:nth-child(odd) .timeline-dot {
            right: -56px;
        }
        
        .timeline-item:nth-child(even) .timeline-dot {
            left: -56px;
        }
        
        /* 业务体系卡片特效 */
        .business-clusters {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            margin: 40px 0;
            justify-content: center;
        }
        
        .cluster-card {
            flex: 1;
            min-width: 300px;
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
            transition: all 0.4s ease;
            opacity: 0;
            transform: translateY(30px);
        }
        
        .cluster-card.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .cluster-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
        }
        
        .cluster-header {
            background: linear-gradient(90deg, #1a3a8f 0%, #2a5bd7 100%);
            color: white;
            padding: 20px;
            text-align: center;
        }
        
        .cluster-title {
            font-size: 1.5rem;
            margin-bottom: 5px;
        }
        
        .cluster-subtitle {
            font-size: 0.9rem;
            opacity: 0.8;
        }
        
        .cluster-list {
            padding: 25px;
            list-style-type: none;
        }
        
        .cluster-list li {
            padding: 10px 0;
            border-bottom: 1px solid #f0f0f0;
            position: relative;
            padding-left: 25px;
        }
        
        .cluster-list li:last-child {
            border-bottom: none;
        }
        
        .cluster-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: #1a3a8f;
            font-weight: bold;
        }
        
        /* 子公司网格特效 */
        .subsidiaries-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 25px;
            margin: 40px 0;
        }
        
        .subsidiary-card {
            background: white;
            border-radius: 8px;
            padding: 25px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            border-left: 4px solid #1a3a8f;
            opacity: 0;
            transform: translateY(20px);
        }
        
        .subsidiary-card.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .subsidiary-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            border-left-color: #ffcc00;
        }
        
        .subsidiary-name {
            color: #1a3a8f;
            font-size: 1.3rem;
            margin-bottom: 10px;
            font-weight: 600;
        }
        
        .subsidiary-desc {
            color: #666;
            font-size: 0.95rem;
        }
        
        /* 合作伙伴轮播特效 */
        .partners-section {
            background-color: #f5f7ff;
            padding: 60px 0;
            margin: 60px 0;
        }
        
        .partners-container {
            display: flex;
            overflow: hidden;
            position: relative;
            height: 100px;
            margin: 40px 0;
        }
        
        .partners-track {
            display: flex;
            animation: scrollPartners 30s linear infinite;
            position: absolute;
            left: 0;
        }
        
        .partner-logo {
            height: 60px;
            margin: 0 40px;
            opacity: 0.7;
            transition: opacity 0.3s;
            filter: grayscale(1);
        }
        
        .partner-logo:hover {
            opacity: 1;
            filter: grayscale(0);
        }
        
        @keyframes scrollPartners {
            0% {
                transform: translateX(0);
            }
            100% {
                transform: translateX(-50%);
            }
        }
        
        /* 荣誉与数据展示 */
        .stats-container {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            margin: 50px 0;
        }
        
        .stat-item {
            text-align: center;
            padding: 30px 20px;
            flex: 1;
            min-width: 200px;
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s ease;
        }
        
        .stat-item.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: #1a3a8f;
            margin-bottom: 10px;
        }
        
        .stat-label {
            font-size: 1.1rem;
            color: #666;
        }
        
        /* ========== 移动端响应式样式 ========== */
        @media (max-width: 768px) {
            /* 手机端导航菜单样式 */
            .nav-menu {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background-color: white;
                flex-direction: column;
                align-items: flex-start;
                padding: 80px 30px 30px;
                transition: all 0.4s cubic-bezier(0.77, 0, 0.175, 1);
                box-shadow: -5px 0 25px rgba(0, 0, 0, 0.1);
                z-index: 999;
                overflow-y: auto;
            }
            
            .nav-menu.active {
                right: 0;
            }
            
            .nav-menu li {
                margin: 0 0 20px 0;
                width: 100%;
            }
            
            .nav-menu a {
                display: block;
                padding: 12px 0;
                font-size: 1.1rem;
                border-bottom: 1px solid rgba(0, 0, 0, 0.05);
                width: 100%;
            }
            
            .nav-menu a:after {
                display: none;
            }
            
            /* 手机端电话链接样式调整 */
            .nav-menu .phone-link {
                background-color: var(--primary);
                color: white;
                margin-top: 20px;
                padding: 15px 25px;
                border-radius: var(--border-radius);
                min-width: auto;
                width: 100%;
                text-align: center;
                justify-content: center;
                border: none;
            }
            
            .nav-menu .phone-link:hover {
                background-color: var(--secondary);
            }
            
            .nav-menu .phone-link i {
                margin-right: 8px;
            }
            
            /* 显示汉堡菜单按钮 */
            .mobile-toggle {
                display: block;
                font-size: 1.5rem;
                color: var(--dark);
                cursor: pointer;
                z-index: 1000;
                transition: transform 0.3s ease;
            }
            
            .mobile-toggle.active {
                transform: rotate(90deg);
            }
            
            /* 修复导航栏在手机端的布局 */
            .navbar {
                padding: 15px 0;
                position: relative;
            }
            
            .logo-text {
                font-size: 1.6rem;
            }
            
            .logo-icon {
                width: 35px;
                height: 35px;
                font-size: 1rem;
            }
            
            /* 语言选择栏调整 */
            .language-links {
                justify-content: flex-start;
                flex-wrap: wrap;
            }
            
            .language-links a {
                margin: 2px 5px;
                font-size: 0.8rem;
                padding: 2px 6px;
            }
            
            .language-selector {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .language-selector span {
                margin-bottom: 5px;
                margin-right: 0;
            }
            
            /* 页面标题调整 */
            .brand-name {
                font-size: 2.5rem;
            }
            
            .brand-slogan {
                font-size: 1.4rem;
            }
            
            /* 时间线调整 */
            .timeline::before {
                left: 30px;
            }
            
            .timeline-item {
                width: 100%;
                left: 0 !important;
                padding-left: 80px !important;
                padding-right: 20px !important;
                text-align: left !important;
            }
            
            .timeline-item:nth-child(odd) .timeline-content::after,
            .timeline-item:nth-child(even) .timeline-content::after {
                display: none;
            }
            
            .timeline-item:nth-child(odd) .timeline-dot,
            .timeline-item:nth-child(even) .timeline-dot {
                left: 21px;
                right: auto;
            }
            
            /* 业务体系卡片调整 */
            .business-clusters {
                flex-direction: column;
            }
            
            .cluster-card {
                min-width: 100%;
            }
            
            /* 页脚调整 */
            .footer-content {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            
            /* 合作伙伴轮播调整 */
            .partners-track {
                animation: scrollPartners 40s linear infinite;
            }
            
            .partner-logo {
                margin: 0 20px;
                height: 50px;
            }
            
            /* 子公司网格调整 */
            .subsidiaries-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            
            /* 统计数据调整 */
            .stats-container {
                flex-direction: column;
                gap: 20px;
            }
            
            .stat-item {
                min-width: 100%;
            }
            
            .section-title {
                font-size: 1.8rem;
            }
        }