* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* Header Styles */
        header {
            background-color: #1a73e8;
            color: white;
            padding: 10px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        
        .logo {
            display: flex;
            align-items: center;
            margin-right: 20px;
        }
        
        .logo img {
            height: 40px;
            margin-right: 10px;
        }
        
        .logo-text {
            font-size: 18px;
            font-weight: bold;
        }
        
        nav {
            flex-grow: 1;
            display: flex;
            justify-content: flex-end;
        }
        
        nav ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            justify-content: center;
        }
        
        nav ul li {
            margin: 5px 10px;
        }
        
        nav ul li a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            display: block;
            padding: 5px 10px;
        }
        
        nav ul li a:hover {
            color: #e0f0ff;
        }
        
        /* Hero Section */
        .hero {
            /* background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://z-cdn-media.chatglm.cn/files/a5e4dc50-59f4-4a4a-9425-ab5155c0eb41_project_poster.jpg?auth_key=1789914478-0ad49c6a0a9d494ebeb688f279be076d-0-cd4dd9bcf360bd5700e22152c89a02ce'); */
            background-size: cover;
            background-position: center;
            color: white;
            text-align: center;
            padding: 80px 0 60px;
            position: relative;
            height: 100vh;
            overflow: hidden;
        }

        .hero-video {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover; /* Cover entire section */
            z-index: -1; /* Behind the content */
        }

        .hero .container {
            position: relative;
            z-index: 1; /* Above the video */
            text-align: center;
            color: white; /* Optional, for better readability */
            top: 50%;
            transform: translateY(-50%);
        }
        
        .hero h1 {
            font-size: 2.5rem;
            margin-bottom: 15px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 25px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .btn {
            display: inline-block;
            background-color: #ff6b00;
            color: white;
            padding: 12px 25px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: bold;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            font-size: 16px;
        }
        
        .btn:hover {
            background-color: #e55a00;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        
        /* Services Section */
        .services {
            padding: 60px 0;
            background-color: white;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 40px;
        }
        
        .section-title h2 {
            font-size: 2rem;
            color: #1a73e8;
            margin-bottom: 15px;
        }
        
        .section-title p {
            font-size: 1rem;
            color: #666;
            max-width: 700px;
            margin: 0 auto;
        }
        
        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }
        
        .service-card {
            background-color: #f8f9fa;
            border-radius: 10px;
            padding: 25px;
            text-align: center;
            transition: all 0.3s ease;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        
        .service-card i {
            font-size: 2.5rem;
            color: #1a73e8;
            margin-bottom: 15px;
        }
        
        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: #333;
        }
        
        .service-card p {
            color: #666;
            font-size: 0.95rem;
        }
        
        /* Features Section */
        .features {
            padding: 60px 0;
            background-color: #f0f7ff;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        
        .feature {
            display: flex;
            align-items: flex-start;
        }
        
        .feature i {
            font-size: 2rem;
            color: #ff6b00;
            margin-right: 15px;
            margin-top: 5px;
        }
        
        .feature-content h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: #333;
        }
        
        .feature-content p {
            color: #666;
            font-size: 0.95rem;
        }
        
        /* Contact Section */
        .contact {
            padding: 60px 0;
            background-color: white;
        }
        
        .contact-container {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
        }
        
        .contact-info h3 {
            font-size: 1.6rem;
            margin-bottom: 20px;
            color: #1a73e8;
        }
        
        .contact-info p {
            margin-bottom: 15px;
            color: #555;
            font-size: 0.95rem;
        }
        
        .contact-info i {
            color: #1a73e8;
            margin-right: 10px;
            width: 20px;
        }
        
        .social-links {
            margin-top: 30px;
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }
        
        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 45px;
            height: 45px;
            background-color: #ffffff;
            border: 2px solid #1a73e8;
            border-radius: 50%;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .social-links a:hover {
            background-color: #1a73e8;
            border-color: #ffffff;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
        }
        
        .social-links a img {
            width: 20px;
            height: 20px;
            filter: invert(22%) sepia(92%) saturate(1352%) hue-rotate(202deg) brightness(94%) contrast(91%); /* Matches #1a73e8 */
        }
        
        .social-links a:hover img {
            filter: invert(100%) sepia(0%) saturate(7500%) hue-rotate(0deg) brightness(100%) contrast(100%); /* White on hover */
        }
        
        .contact-form {
            background-color: #f8f9fa;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 5px;
            font-weight: 500;
            color: #333;
            font-size: 0.95rem;
        }
        
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 16px;
        }
        
        .form-group textarea {
            height: 120px;
            resize: vertical;
        }
        
        /* Footer */
        footer {
            background-color: #1a1a1a;
            color: white;
            text-align: center;
            padding: 25px 0;
        }
        
        footer p {
            margin-bottom: 8px;
            font-size: 0.9rem;
        }
        
        /* Responsive for all devices */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            
            .hero p {
                font-size: 1.1rem;
            }
            
            .section-title h2 {
                font-size: 1.8rem;
            }
            
            .service-card i {
                font-size: 2.2rem;
            }
            
            .service-card h3 {
                font-size: 1.2rem;
            }
        }
        
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                text-align: center;
            }
            
            .logo {
                margin-bottom: 15px;
                margin-right: 0;
            }
            
            nav {
                width: 100%;
            }
            
            nav ul {
                margin-top: 10px;
                width: 100%;
            }
            
            nav ul li {
                margin: 5px;
            }
            
            .hero h1 {
                font-size: 2rem;
            }
            
            .hero p {
                font-size: 1rem;
            }
            
            .section-title h2 {
                font-size: 1.7rem;
            }
            
            .section-title p {
                font-size: 0.95rem;
            }
            
            .service-grid {
                grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
                gap: 15px;
            }
            
            .service-card {
                padding: 20px;
            }
            
            .service-card i {
                font-size: 2rem;
            }
            
            .service-card h3 {
                font-size: 1.1rem;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            
            .feature i {
                font-size: 1.8rem;
            }
            
            .feature-content h3 {
                font-size: 1.2rem;
            }
            
            .contact-container {
                grid-template-columns: 1fr;
            }
            
            .social-links a {
                width: 40px;
                height: 40px;
            }
            
            .social-links a img {
                width: 18px;
                height: 18px;
            }
        }
        
        @media (max-width: 480px) {
            .hero {
                padding: 60px 0 40px;
            }
            
            .hero h1 {
                font-size: 1.8rem;
            }
            
            .hero p {
                font-size: 0.95rem;
            }
            
            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
            
            .section-title h2 {
                font-size: 1.5rem;
            }
            
            .service-grid {
                grid-template-columns: 1fr;
                gap: 15px;
            }
            
            .service-card {
                padding: 20px;
            }
            
            .service-card i {
                font-size: 2rem;
            }
            
            .service-card h3 {
                font-size: 1.1rem;
            }
            
            .service-card p {
                font-size: 0.9rem;
            }
            
            .feature {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            
            .feature i {
                margin-right: 0;
                margin-bottom: 15px;
            }
            
            .contact-info h3 {
                font-size: 1.4rem;
            }
            
            .contact-info p {
                font-size: 0.9rem;
            }
            
            .form-group label {
                font-size: 0.9rem;
            }
            
            .form-group input,
            .form-group textarea {
                padding: 10px;
                font-size: 14px;
            }
            
            footer p {
                font-size: 0.85rem;
            }
        }
        
        /* Specific adjustments for tablets and foldables */
        @media (min-width: 768px) and (max-width: 1024px) {
            .contact-container {
                grid-template-columns: 1fr 1fr;
            }
        }
        
        /* Adjustments for landscape orientation on mobile */
        @media (max-height: 500px) and (orientation: landscape) {
            .hero {
                padding: 40px 0;
            }
            
            .hero h1 {
                font-size: 1.8rem;
            }
            
            .hero p {
                font-size: 0.9rem;
                margin-bottom: 15px;
            }
            
            .btn {
                padding: 8px 18px;
                font-size: 14px;
            }
        }