* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Arial', sans-serif;
        }
        
        body {
            color: #333;
            line-height: 1.6;
        }
        
        a {
            text-decoration: none;
            color: inherit;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .btn {
            display: inline-block;
            padding: 12px 30px;
            background-color: #4CAF50;
            color: white;
            border-radius: 4px;
            font-weight: bold;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
        }
        
        .btn:hover {
            background-color: #45a049;
            transform: translateY(-2px);
        }
        
        .btn-secondary {
            background-color: #f8f9fa;
            color: #333;
            border: 1px solid #ddd;
        }
        
        .btn-secondary:hover {
            background-color: #e9ecef;
        }
        
        section {
            padding: 80px 0;
        }
        
        h2 {
            font-size: 36px;
            margin-bottom: 30px;
            text-align: center;
        }

       /* 头部样式 */
        header {
            background-color: #fff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: fixed;
            width: 100%;
            z-index: 1000;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }
        
        .logo {
            height: 50px;
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 30px;
        }
        
        nav ul li a {
            font-weight: 500;
            padding: 5px 0;
            position: relative;
        }
        
        nav ul li a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #4CAF50;
            transition: width 0.3s;
        }
        
        nav ul li a:hover:after {
            width: 100%;
        }
        /* 产品介绍部分 */
        .hero {
            background: linear-gradient(135deg, #1d4ed8 0%, #0ea5e9 100%);
            color: white;
            padding: 120px 20px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,160L48,165.3C96,171,192,181,288,197.3C384,213,480,235,576,224C672,213,768,171,864,149.3C960,128,1056,128,1152,138.7C1248,149,1344,171,1392,181.3L1440,192L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
            background-size: cover;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            font-weight: 800;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
        }

        .hero p {
            font-size: 1.4rem;
            margin-bottom: 35px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            font-weight: 300;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-top: 30px;
        }

        .btn {
            padding: 16px 36px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
            text-decoration: none;
            display: inline-block;
        }

        .btn-primary {
            background-color: #fff;
            color: #2563eb;
            box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
        }

        .btn-primary:hover {
            background-color: #f0f7ff;
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
        }

        .btn-secondary {
            background-color: transparent;
            color: white;
            border: 2px solid rgba(255, 255, 255, 0.8);
        }

        .btn-secondary:hover {
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }

        /* 视频展示部分 */
        .video-section {
            padding: 100px 20px;
            background-color: #f1f5f9;
            text-align: center;
        }

        .section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 60px;
            color: #1e293b;
            position: relative;
        }

        .section-title::after {
            content: '';
            display: block;
            width: 80px;
            height: 4px;
            background: linear-gradient(to right, #2563eb, #0ea5e9);
            margin: 15px auto 0;
            border-radius: 2px;
        }

        .video-container {
            max-width: 900px;
            margin: 0 auto;
            background: #fff;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }

        .video-wrapper {
            position: relative;
            padding-top: 56.25%; /* 16:9 Aspect Ratio */
        }

        .video-player {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: #0f172a;
        }

        /* 功能特性部分 */
        .features {
            padding: 100px 20px;
            background-color: #fff;
        }

        .features-container {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .feature-card {
            background: #fff;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            padding: 40px 30px;
            width: 350px;
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid #e2e8f0;
        }

        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(37, 99, 235, 0.15);
        }

        .feature-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, #2563eb, #0ea5e9);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            color: white;
            font-size: 32px;
        }

        .feature-card h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: #1e293b;
        }

        .feature-card p {
            color: #64748b;
            font-size: 1.1rem;
            line-height: 1.7;
        }

        /* 安全使用指南部分 */
        .safety {
            padding: 100px 20px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: white;
        }

        .safety-container {
            max-width: 1000px;
            margin: 0 auto;
        }

        .safety-steps {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 30px;
            margin-top: 60px;
        }

        .safety-step {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 15px;
            padding: 35px 30px;
            width: 300px;
            text-align: center;
            transition: transform 0.3s ease;
            backdrop-filter: blur(5px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .safety-step:hover {
            transform: scale(1.05);
            background: rgba(37, 99, 235, 0.15);
        }

        .step-number {
            display: inline-block;
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, #2563eb, #0ea5e9);
            border-radius: 50%;
            line-height: 50px;
            font-size: 1.5rem;
            font-weight: bold;
            margin-bottom: 25px;
        }

        .safety-step h3 {
            font-size: 1.5rem;
            margin-bottom: 20px;
        }

        .safety-step p {
            color: #cbd5e1;
            font-size: 1.05rem;
        }

        /* 底部样式 */
        .footer {
            background-color: #0f172a;
            color: #cbd5e1;
            padding: 70px 8% 30px;
        }

        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-column {
            flex: 1;
            min-width: 250px;
            margin-bottom: 40px;
        }

        .footer-column h3 {
            color: white;
            font-size: 1.4rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-column h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: linear-gradient(to right, #2563eb, #0ea5e9);
            border-radius: 2px;
        }

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

        .footer-links li {
            margin-bottom: 15px;
        }

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.3s ease;
            font-size: 1.05rem;
        }

        .footer-links a:hover {
            color: #60a5fa;
        }

        .contact-info {
            color: #94a3b8;
            font-size: 1.05rem;
            line-height: 1.8;
        }

        .social-icons {
            display: flex;
            gap: 20px;
            margin-top: 20px;
        }

        .social-icon {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 18px;
            transition: all 0.3s ease;
        }

        .social-icon:hover {
            background: #2563eb;
            transform: translateY(-3px);
        }

        .copyright {
            text-align: center;
            padding-top: 40px;
            margin-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 1rem;
            color: #94a3b8;
        }

        /* 响应式设计 */
        @media (max-width: 992px) {
            .nav-links li {
                margin-left: 20px;
            }
            
            .hero h1 {
                font-size: 2.8rem;
            }
            
            .hero p {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 768px) {
            .navbar {
                flex-direction: column;
                padding: 20px;
            }
            
            .nav-links {
                margin-top: 20px;
                flex-wrap: wrap;
                justify-content: center;
            }
            
            .nav-links li {
                margin: 10px 15px;
            }
            
            .hero {
                padding: 80px 20px;
            }
            
            .hero h1 {
                font-size: 2.3rem;
            }
            
            .cta-buttons {
                flex-direction: column;
                align-items: center;
                gap: 15px;
            }
            
            .btn {
                width: 100%;
                max-width: 300px;
                text-align: center;
            }
            
            .features-container {
                flex-direction: column;
                align-items: center;
            }
            
            .feature-card {
                width: 100%;
                max-width: 500px;
            }
        }

        @media (max-width: 480px) {
            .logo-text {
                font-size: 20px;
            }
            
            .hero h1 {
                font-size: 2rem;
            }
            
            .section-title {
                font-size: 2rem;
            }
        }