/* ========== 全局样式 ========== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            overflow-x: hidden;
            color: white;
            background: #585858;
            touch-action: pan-y;
        }
        a {  
        text-decoration: none !important;
        color: inherit;
        }  

        /* 页面背景视频 */
        #page-bg-video {
            position: fixed;
            top: 0;
            left: 0;
            min-width: 100%;
            min-height: 100%;
            width: auto;
            height: auto;
            z-index: -100;
            object-fit: cover;
            opacity: 0.30;
            filter: blur(1px);
        }

        /* ========== 新版导航栏样式 ========== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 5%;
            background: rgba(241, 241, 241, 0.95);
            z-index: 1000;
            transition: all 0.4s ease;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
        }

        .navbar.scrolled {
            padding: 10px 5%;
            background: rgba(241, 241, 241, 0.98);
        }

        .logo {
            font-size: 28px;
            font-weight: 700;
            color: #4fc3f7;
            text-decoration: none;
            display: flex;
            align-items: center;
        }

        .logo img {
            height: 50px;
        }

        .nav-links {
            display: flex;
            gap: 30px;
        }

        .nav-item {
            position: relative;
            padding: 10px 0;
        }

        .nav-link {
            color: #000000;
            text-decoration: none;
            font-size: 16px;
            font-weight: 500;
            transition: color 0.3s;
            padding: 8px 50px;
            border-radius: 4px;
        }

        .nav-link:hover {
            color: #4fc3f7;
            background: rgba(79, 195, 247, 0.1);
        }

        /* 新版下拉菜单 - 优化全屏宽度 */
        .dropdown {
            position: fixed; /* 改为固定定位 */
            top: 80px; /* 导航栏高度 */
            left: 0;
            width: 100%; /* 使用100%宽度 */
            background: rgba(241, 241, 241, 0.98);
            border-radius: 0 0 8px 8px;
            padding: 20px 5%; /* 添加左右内边距 */
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.3s ease;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            display: flex;
            z-index: 1001;
            max-width: 100vw;
            box-sizing: border-box;
        }

        .navbar.scrolled .dropdown {
            top: 60px; /* 滚动后导航栏高度 */
        }

        .nav-item:hover .dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        /* 二级菜单容器 */
        .secondary-menu {
            width: 30%;
            padding: 0 20px;
            border-right: 1px solid rgba(0, 0, 0, 0.1);
        }

        /* 三级菜单容器 */
        .tertiary-menu {
            width: 70%;
            padding: 0 20px;
			max-height: 90vh;
            overflow-y: auto;
        }

        .secondary-item {
            display: flex;
            align-items: center;
            padding: 12px 15px;
            color: #000;
            text-decoration: none;
            border-radius: 4px;
            transition: all 0.2s;
            margin-bottom: 5px;
        }

        .secondary-item:hover {
            background: rgba(79, 195, 247, 0.15);
        }

        .secondary-item i {
            width: 24px;
            text-align: center;
            margin-right: 12px;
            color: #4fc3f7;
            font-size: 18px;
        }

        .secondary-item span {
            font-weight: 500;
        }

        /* 三级菜单内容 */
        .tertiary-content {
            display: none;
            padding: 10px;
        }

        .tertiary-content.active {
            display: block;
        }

        .tertiary-title {
            font-size: 1.2rem;
            color: #0a1929;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 1px solid rgba(79, 195, 247, 0.3);
        }

        .tertiary-links {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 15px;
        }

        .tertiary-link {
            display: block;
            padding: 10px;
            color: #333;
            text-decoration: none;
            transition: all 0.2s;
            border-radius: 4px;
        }

        .tertiary-link:hover {
            background: rgba(79, 195, 247, 0.1);
            transform: translateX(5px);
        }

        .tertiary-link h4 {
            color: #0a1929;
            margin-bottom: 5px;
            font-weight: 600;
        }

        .tertiary-link p {
            color: #666;
            font-size: 0.85rem;
            line-height: 1.4;
        }

        /* 只有二级菜单时的布局 */
        .dropdown.only-secondary .secondary-menu {
            width: 100%;
            border-right: none;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .dropdown.only-secondary .secondary-item {
            flex: 1;
            min-width: 200px;
            flex-direction: column;
            align-items: flex-start;
            padding: 15px;
        }

        .dropdown.only-secondary .secondary-item i {
            margin-bottom: 8px;
            font-size: 24px;
        }

        .dropdown.only-secondary .tertiary-menu {
            display: none;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: #333;
            font-size: 24px;
            cursor: pointer;
            z-index: 1002;
        }

        /* ========== 其他原有样式保持不变 ========== */
        /* 主内容区域 */
        .section {
            min-height: 100vh;
            padding: 80px 5% 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .section-content {
            max-width: 1400px;
            width: 100%;
            margin: 0 auto;
        }

        /* Banner区域 - 修复切换问题 */
        .banner-section {
            position: relative;
            height: 100vh;
            overflow: hidden;
        }

        .banner-container {
            width: 200%;
            height: 100%;
            display: flex;
            position: absolute;
            top: 0;
            left: 0;
            transition: transform 1.2s cubic-bezier(0.22, 0.61, 0.36, 1);
        }

        .banner {
            width: 50%;
            height: 100%;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        .banner-video {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: -1;
        }

        .banner-content {
            text-align: center;
            max-width: 800px;
            padding: 0 20px;
            z-index: 2;
        }

        .banner-title {
            font-size: 4rem;
            font-weight: 800;
            margin-bottom: 20px;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
        }

        .banner-text {
            font-size: 1.5rem;
            margin-bottom: 30px;
            line-height: 1.6;
            text-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
        }

        .banner-btn {
            display: inline-block;
            padding: 15px 40px;
            background: rgba(79, 195, 247, 0.2);
            border: 2px solid #4fc3f7;
            color: white;
            font-size: 1.1rem;
            font-weight: 600;
            text-decoration: none;
            border-radius: 50px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .banner-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 0;
            height: 100%;
            background: rgba(79, 195, 247, 0.5);
            transition: width 0.5s ease;
            z-index: -1;
        }

        .banner-btn:hover::before {
            width: 100%;
        }

        .banner-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }

        .banner-indicators {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 15px;
            z-index: 10;
        }

        .banner-indicator {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.5);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .banner-indicator.active {
            background: #4fc3f7;
            transform: scale(1.2);
        }

        .scroll-indicator {
            position: absolute;
            bottom: 70px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            flex-direction: column;
            align-items: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            z-index: 10;
        }

        .scroll-indicator .mouse {
            width: 25px;
            height: 40px;
            border: 2px solid rgba(255, 255, 255, 0.5);
            border-radius: 15px;
            margin-bottom: 8px;
            position: relative;
        }

        .scroll-indicator .wheel {
            width: 4px;
            height: 8px;
            background: rgba(255, 255, 255, 0.7);
            border-radius: 2px;
            position: absolute;
            top: 6px;
            left: 50%;
            transform: translateX(-50%);
            animation: scrollAnimation 2s infinite;
        }

        /* 成就区域 - 带数字加载动画 */
        .achievement-section {
            text-align: center;
        }

        .section-title {
            font-size: 3rem;
            margin-bottom: 60px;
            position: relative;
            display: inline-block;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background: #4fc3f7;
            border-radius: 2px;
        }

        .achievements {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 50px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .achievement-item {
            flex: 1;
            min-width: 200px;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            transition: transform 0.3s ease;
            backdrop-filter: blur(5px);
        }

        .achievement-item:hover {
            transform: translateY(-10px);
        }
        
        /* 成就图标样式 */
        .achievement-icon {
            font-size: 3.5rem;
            color: #ffffff;
            margin-bottom: 15px;
            transition: all 0.3s ease;
        }
        
        .achievement-item:hover .achievement-icon {
            transform: scale(1.15);
            color: #ffffff;
        }

        .achievement-number {
            font-size: 4rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 10px;
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .achievement-text {
            font-size: 1.3rem;
            font-weight: 500;
        }

        /* 案例区域 - 优化版 */
        .case-section {
            position: relative;
            overflow: hidden;
            padding: 60px 5%;
        }

        .case-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            background-size: cover;
            background-position: center;
            transition: opacity 0.8s ease;
            opacity: 0.5;
        }

        .case-content {
            max-width: 1400px;
            width: 100%;
            margin: 0 auto;
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            /* min-height: 80vh; */
        }

        .case-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .case-details {
            border-radius: 15px;
            padding: 40px;
            margin-bottom: 40px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            transition: all 0.5s ease;
        }

        .case-title {
            font-size: 2.5rem;
            margin-bottom: 20px;
            color: #4fc3f7;
        }

        .case-description {
            font-size: 1.2rem;
            line-height: 1.8;
            margin-bottom: 30px;
            max-width: 800px;
        }

        .case-features {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 30px;
        }

        .feature {
            background: rgba(79, 195, 247, 0.15);
            border-radius: 8px;
            padding: 10px 20px;
            font-size: 0.95rem;
        }

        .case-btn {
            display: inline-block;
            padding: 12px 35px;
            background: #4fc3f7;
            color: #0a1929;
            font-size: 1.1rem;
            font-weight: 600;
            text-decoration: none;
            border-radius: 50px;
            transition: all 0.3s ease;
        }

        .case-btn:hover {
            background: #29b6f6;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }

        .cases-container {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 12px;
        }

        .case-item {
            height: 100px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
            backdrop-filter: blur(5px);
            font-size: 0.95rem;
            font-weight: 500;
        }

        .case-item i {
            font-size: 1.5rem;
            margin-bottom: 8px;
            color: #ffffff;
        }

        .case-item:hover {
            background: rgba(79, 195, 247, 0.15);
            transform: scale(1.05);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
        }

        .case-item.active {
            background: rgba(79, 195, 247, 0.25);
            transform: scale(1.08);
            border: 2px solid #4fc3f7;
        }

        /* ========== 客户区域优化 ========== */
        .client-section {
            padding: 60px 0;
            overflow: hidden;
        }

        .clients-container {
            display: flex;
            flex-direction: column;
            gap: 40px;
            margin-top: 40px;
        }

        .client-row {
            position: relative;
            height: 100px;
            overflow: hidden;
            white-space: nowrap;
            margin-bottom: 20px;
        }

        .client-track {
            position: absolute;
            top: 0;
            display: inline-flex;
            height: 100%;
            animation-timing-function: linear;
            animation-iteration-count: infinite;
        }

        .client-track.slide-left {
            animation-name: slideLeft;
        }
        
        .client-track.slide-right {
            animation-name: slideRight;
        }

        .client-item {
            flex-shrink: 0;
            width: 200px;
            height: 100%;
            margin: 0 20px;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }

        .client-logo {
            max-width: 80%;
            max-height: 60%;
            transition: all 0.3s ease;
        }

        .client-item:hover .client-logo {
            filter: grayscale(0%);
            transform: scale(1.1);
        }

        /* 无缝滚动关键帧 */
        @keyframes slideLeft {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }

        @keyframes slideRight {
            0% { transform: translateX(-50%); }
            100% { transform: translateX(0); }
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.1); }
            100% { transform: scale(1); }
        }

        @keyframes scrollAnimation {
            0% {
                transform: translate(-50%, 0);
                opacity: 0;
            }
            50% {
                opacity: 1;
            }
            100% {
                transform: translate(-50%, 12px);
                opacity: 0;
            }
        }

        /* 新闻区域 */
        .news-container {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            grid-template-rows: auto auto;
            gap: 30px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .main-news {
            grid-column: 1 / span 2;
            border-radius: 15px;
            overflow: hidden;
            display: flex;
            box-shadow: 0 10px 30px rgba(98, 104, 110, 0.68);
            transition: all 0.4s ease;
        }
        
        /* 新闻卡片悬停效果 */
        .main-news:hover,
        .sub-news:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
        }

       .main-news-img {
            width: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3rem;
            transition: all 0.4s ease;
			overflow: hidden;
        }
		.main-news-img img {
            width: 100%;
            height: 100%;
           object-fit: cover; /* 保持与原background-size:cover相同效果 */
           transition: all 0.4s ease;
        }

        .main-news-content {
            width: 50%;
            padding: 40px;
        }

        .news-date {
            color: #ffffff;
            font-weight: 600;
            margin-bottom: 15px;
        }

        .news-title {
            font-size: 2rem;
            margin-bottom: 20px;
            line-height: 1.3;
            transition: color 0.3s ease;
        }
        
        .news-item:hover .news-title {
            color: #ffffff;
        }

        .news-excerpt {
            font-size: 1.1rem;
            line-height: 1.6;
            color: #e0f7fa;
            margin-bottom: 25px;
        }

        .news-link {
            color: #ffffff;
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.3s ease;
        }
        
        .news-item:hover .news-link {
            color: #ffffff;
            transform: translateX(5px);
        }

        .news-link i {
            transition: transform 0.3s ease;
        }

        .news-link:hover i {
            transform: translateX(5px);
        }

        .sub-news {
            border-radius: 15px;
            padding: 25px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            transition: all 0.4s ease;
        }
        
        .news-item {
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .sub-news .news-title {
            font-size: 1.5rem;
        }

        /* 底部区域 */
        .footer {
            background: rgba(98, 104, 110, 0.68); 
            padding: 60px 5% 30px;
            position: relative;
            z-index: 10;
        }

        .footer-content {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 50px;
            max-width: 1400px;
            margin: 0 auto 40px;
        }

        .footer-section h3 {
            font-size: 1.5rem;
            margin-bottom: 25px;
            color: #4fc3f7;
        }

        .contact-info p {
            margin-bottom: 15px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .contact-info i {
            color: #4fc3f7;
            margin-top: 4px;
        }

        .quick-links {
            list-style: none;
        }

        .quick-links li {
            margin-bottom: 12px;
        }

        .quick-links a {
            color: #e0f7fa;
            text-decoration: none;
            transition: color 0.3s;
        }

        .quick-links a:hover {
            color: #4fc3f7;
        }

        .qrcode-container {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .qrcode {
            width: 150px;
            height: 150px;
            background: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 15px;
            font-size: 0.8rem;
            color: #333;
            font-weight: bold;
            text-align: center;
            padding: 10px;
        }

        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #f4fafd;
            font-size: 0.9rem;
        }

        /* ========== 响应式设计 ========== */
        @media (max-width: 1200px) {
            .cases-container {
                grid-template-columns: repeat(4, 1fr);
            }
            
            .banner-title {
                font-size: 3.5rem;
            }
            
            .tertiary-links {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 992px) {
            .cases-container {
                grid-template-columns: repeat(3, 1fr);
            }
            
            .main-news {
                flex-direction: column;
            }
            
            .main-news-img, .main-news-content {
                width: 100%;
            }
            
            .footer-content {
                grid-template-columns: 1fr 1fr;
            }
            
            .qrcode-container {
                grid-column: span 2;
                margin-top: 20px;
            }
            
            .banner-title {
                font-size: 3rem;
            }
            
            .banner-text {
                font-size: 1.3rem;
            }
            
            .case-title {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 80%;
                height: calc(100vh - 80px);
                background: rgba(241, 241, 241, 0.95);
                flex-direction: column;
                gap: 0;
                padding: 20px;
                transition: left 0.4s ease;
                z-index: 999;
                overflow-y: auto;
            }
            
            .nav-links.active {
                left: 0;
            }
            
            .nav-item {
                width: 100%;
                padding: 0;
            }
            
            .nav-link {
                display: block;
                padding: 15px 10px;
                border-bottom: 1px solid rgba(0, 0, 0, 0.1);
            }
            
            .dropdown {
                position: static;
                width: 100%;
                top: auto !important;
                opacity: 1;
                visibility: visible;
                transform: none;
                background: transparent;
                box-shadow: none;
                padding: 0;
                display: none;
                flex-direction: column;
            }
            
            .nav-item:hover .dropdown {
                display: flex;
            }
            
            .secondary-menu, .tertiary-menu {
                width: 100%;
                border-right: none;
                padding: 0;
            }
            
            .tertiary-links {
                grid-template-columns: 1fr;
            }
            
            .dropdown.only-secondary .secondary-menu {
                flex-direction: column;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .banner-title {
                font-size: 2.2rem;
            }
            
            .banner-text {
                font-size: 1.1rem;
                margin-bottom: 20px;
            }
            
            .banner-btn {
                padding: 12px 30px;
                font-size: 1rem;
            }
            
            .achievements {
                flex-direction: column;
                align-items: center;
                gap: 30px;
            }
            
            .achievement-item {
                min-width: 100%;
            }
            
            .cases-container {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .news-container {
                grid-template-columns: 1fr;
            }
            
            .main-news {
                grid-column: 1;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
            }
            
            .qrcode-container {
                grid-column: 1;
            }
            
            .case-details {
                padding: 25px;
            }
            
            .case-title {
                font-size: 1.8rem;
            }
            
            .case-description {
                font-size: 1rem;
            }
            
            .section-title {
                font-size: 2.2rem;
            }
            
            .client-item {
                width: 160px;
            }
        }

        @media (max-width: 576px) {
            .banner-title {
                font-size: 1.8rem;
            }
            
            .banner-text {
                font-size: 1rem;
            }
            
            .cases-container {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            
            .case-item {
                height: 90px;
                font-size: 0.85rem;
            }
            
            .case-item i {
                font-size: 1.2rem;
            }
            
            .section-title {
                font-size: 1.8rem;
            }
            
            .achievement-number {
                font-size: 3rem;
            }
            
            .achievement-text {
                font-size: 1.1rem;
            }
            
            .client-item {
                width: 140px;
                margin: 0 10px;
            }
            
            .main-news-content {
                padding: 25px;
            }
            
            .news-title {
                font-size: 1.6rem;
            }
            
            .news-excerpt {
                font-size: 1rem;
            }
        }