<style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background: #fff;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        /* 导航栏 */
        .navbar {
            background: #fff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            font-size: 26px;
            font-weight: 700;
            color: #ff6b00;
        }
        .logo span {
            color: #333;
            font-size: 18px;
            margin-left: 8px;
        }
        .nav-links {
            display: flex;
            gap: 32px;
            font-size: 16px;
            font-weight: 500;
        }
        .nav-links a {
            padding: 8px 0;
            border-bottom: 2px solid transparent;
            transition: 0.3s;
        }
        .nav-links a:hover, .nav-links a.active {
            color: #ff6b00;
            border-bottom-color: #ff6b00;
        }
        .nav-btn {
            background: linear-gradient(135deg, #ff6b00, #ff8c1a);
            color: #fff !important;
            padding: 10px 24px !important;
            border-radius: 30px;
            font-weight: 600;
            transition: 0.3s;
            border: none !important;
        }
        .nav-btn:hover {
            background: linear-gradient(135deg, #e05a00, #ff6b00);
            transform: scale(1.02);
            box-shadow: 0 4px 15px rgba(255,107,0,0.3);
        }
        /* Hero区域 */
        .hero {
            background: linear-gradient(135deg, #f8f9ff 0%, #e8f0fe 100%);
            padding: 70px 0;
        }
        .hero .container {
            display: flex;
            align-items: center;
            gap: 40px;
        }
        .hero-content {
            flex: 1;
        }
        .hero-content h1 {
            font-size: 48px;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 20px;
            color: #1a1a2e;
        }
        .hero-content h1 .highlight {
            color: #ff6b00;
        }
        .hero-content .subtitle {
            font-size: 20px;
            color: #555;
            margin-bottom: 30px;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, #ff6b00, #ff8c1a);
            color: #fff;
            padding: 14px 32px;
            border-radius: 40px;
            font-size: 18px;
            font-weight: 600;
            display: inline-block;
            transition: 0.3s;
            box-shadow: 0 4px 15px rgba(255,107,0,0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255,107,0,0.4);
        }
        .btn-secondary {
            background: #fff;
            color: #ff6b00;
            padding: 14px 32px;
            border-radius: 40px;
            font-size: 18px;
            font-weight: 600;
            display: inline-block;
            transition: 0.3s;
            border: 2px solid #ff6b00;
        }
        .btn-secondary:hover {
            background: #ff6b00;
            color: #fff;
        }
        .hero-image {
            flex: 1;
            text-align: center;
        }
        .hero-image .img-placeholder {
            width: 100%;
            max-width: 400px;
            height: auto;
            background: linear-gradient(145deg, #ff6b00, #ff8c1a);
            border-radius: 30px;
            padding: 30px;
            margin: 0 auto;
            box-shadow: 0 20px 40px rgba(255,107,0,0.2);
        }
        .img-placeholder svg {
            width: 100%;
            height: auto;
        }
        /* 核心优势卡片区 */
        .features {
            padding: 80px 0;
            background: #fff;
        }
        .section-title {
            text-align: center;
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 20px;
            color: #1a1a2e;
        }
        .section-subtitle {
            text-align: center;
            font-size: 18px;
            color: #666;
            margin-bottom: 50px;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
        }
        .feature-card {
            background: #fff;
            padding: 30px 24px;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            transition: 0.3s;
            text-align: center;
            border: 1px solid #f0f0f0;
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, #fff3e0, #ffe0b2);
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 32px;
        }
        .feature-card h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 15px;
            color: #1a1a2e;
        }
        .feature-card p {
            color: #666;
            font-size: 15px;
        }
        /* 产品亮点区 */
        .highlights {
            padding: 80px 0;
            background: #fafbff;
        }
        .highlight-item {
            display: flex;
            align-items: center;
            gap: 60px;
            margin-bottom: 60px;
        }
        .highlight-item:last-child {
            margin-bottom: 0;
        }
        .highlight-content {
            flex: 1;
        }
        .highlight-content h3 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 20px;
            color: #1a1a2e;
        }
        .highlight-content p {
            font-size: 17px;
            color: #555;
            margin-bottom: 20px;
        }
        .highlight-list {
            list-style: none;
        }
        .highlight-list li {
            padding: 8px 0;
            font-size: 16px;
            color: #444;
            display: flex;
            align-items: center;
        }
        .highlight-list li::before {
            content: "✓";
            color: #ff6b00;
            font-weight: bold;
            margin-right: 12px;
        }
        .highlight-image {
            flex: 1;
            background: linear-gradient(145deg, #e8f0fe, #d4e4fc);
            border-radius: 30px;
            padding: 40px;
            text-align: center;
        }
        /* 数据背书区 */
        .stats {
            padding: 60px 0;
            background: linear-gradient(135deg, #1a1a2e, #16213e);
            color: #fff;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }
        .stat-item h4 {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #ff8c1a;
        }
        .stat-item p {
            font-size: 18px;
            opacity: 0.9;
        }
        /* 下载入口区 */
        .download-section {
            padding: 80px 0;
            background: #fff;
        }
        .download-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
        }
        .download-card {
            background: #f8f9ff;
            padding: 30px 20px;
            border-radius: 20px;
            text-align: center;
            transition: 0.3s;
            border: 1px solid #e8e8f0;
        }
        .download-card:hover {
            background: #fff;
            box-shadow: 0 15px 35px rgba(0,0,0,0.08);
        }
        .download-card .platform-icon {
            font-size: 48px;
            margin-bottom: 15px;
        }
        .download-card h4 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .download-card .btn-download {
            background: #ff6b00;
            color: #fff;
            padding: 10px 24px;
            border-radius: 30px;
            font-weight: 500;
            display: inline-block;
            margin-top: 15px;
            transition: 0.3s;
        }
        .download-card .btn-download:hover {
            background: #e05a00;
        }
        .safety-note {
            text-align: center;
            margin-top: 30px;
            color: #27ae60;
            font-size: 15px;
        }
        /* 用户评价 */
        .testimonials {
            padding: 60px 0 80px;
            background: #fafbff;
        }
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .testimonial-card {
            background: #fff;
            padding: 30px;
            border-radius: 20px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
        }
        .testimonial-card .stars {
            color: #f5b342;
            font-size: 20px;
            margin-bottom: 15px;
        }
        .testimonial-card p {
            color: #555;
            font-style: italic;
            margin-bottom: 15px;
        }
        .testimonial-card .user {
            color: #888;
            font-size: 14px;
        }
        /* 页脚 */
        .footer {
            background: #1a1a2e;
            color: #fff;
            padding: 40px 0 20px;
        }
        .footer-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            margin-bottom: 30px;
        }
        .footer-links {
            display: flex;
            gap: 30px;
        }
        .footer-links a {
            color: #ccc;
            transition: 0.3s;
        }
        .footer-links a:hover {
            color: #ff8c1a;
        }
        .copyright {
            text-align: center;
            color: #888;
            font-size: 14px;
            padding-top: 20px;
            border-top: 1px solid #333;
        }
        /* 响应式 */
        @media (max-width: 992px) {
            .features-grid, .download-grid, .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero .container {
                flex-direction: column;
                text-align: center;
            }
            .highlight-item {
                flex-direction: column;
                text-align: center;
            }
            .nav-links {
                display: none;
            }
        }
        @media (max-width: 576px) {
            .features-grid, .download-grid, .stats-grid, .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .hero-content h1 {
                font-size: 32px;
            }
        }
    </style>