* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        :root {
            --primary: #3a86ff;
            --primary-light: #5fa5ff;
            --secondary: #ff006e;
            --accent: #8338ec;
            --light: #f8f9fa;
            --light-gray: #e9ecef;
            --medium-gray: #ced4da;
            --dark: #212529;
            --success: #38b000;
            --border-radius: 16px;
            --box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        
        body {
            background: linear-gradient(135deg, #f5f9ff 0%, #ffffff 100%);
            color: var(--dark);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }
        
        .container {
            width: 100%;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 40px;
        }
        
        /* 头部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            backdrop-filter: blur(10px);
            padding: 15px 0;
        }
        
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .logo-icon {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 24px;
            box-shadow: 0 4px 12px rgba(58, 134, 255, 0.3);
        }
        
        .logo-text {
            font-size: 26px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .nav-links {
            display: flex;
            gap: 35px;
        }
        
        .nav-links a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 600;
            font-size: 17px;
            transition: var(--transition);
            position: relative;
        }
        
        .nav-links a:hover {
            color: var(--primary);
        }
        
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        
        .nav-links a:hover::after {
            width: 100%;
        }
        
        /* 英雄区域 */
        .hero {
            padding: 160px 0 100px;
            display: flex;
            align-items: center;
            gap: 80px;
        }
        
        .hero-content {
            flex: 1;
        }
        
        .hero h1 {
            font-size: 3.8rem;
            margin-bottom: 25px;
            line-height: 1.2;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-align: center;
        }
        
        .hero p {
            font-size: 1.25rem;
            margin-bottom: 35px;
            color: #495057;
            text-align: center;
        }
        
        .hero-stats {
            display: flex;
            gap: 40px;
            margin: 30px auto 40px;
            justify-content: center;
        }
        
        .stat-item {
            text-align: center;
        }
        
        .stat-value {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
        }
        
        .stat-label {
            font-size: 1rem;
            color: #6c757d;
        }
        
        .hero-buttons {
            display: flex;
            gap: 20px;
            margin: 10px auto;
            justify-content: center;
        }
        
        .btn {
            padding: 16px 36px;
            border-radius: var(--border-radius);
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            border: none;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: white;
            box-shadow: 0 12px 25px rgba(58, 134, 255, 0.3);
        }
        
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(58, 134, 255, 0.4);
        }
        
        .btn-secondary {
            background-color: white;
            color: var(--primary);
            border: 2px solid var(--primary);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .btn-secondary:hover {
            background-color: var(--light);
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
        }
        
        .hero-image {
            flex: 1;
            display: flex;
            justify-content: center;
            position: relative;
        }
        
        .phone-mockup {
            width: 300px;
            height: 600px;
            background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
            border-radius: 45px;
            box-shadow: var(--box-shadow);
            position: relative;
            overflow: hidden;
            border: 15px solid var(--dark);
            z-index: 2;
        }
        
        .phone-screen {
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #5fa5ff 0%, #9d7aff 100%);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 30px;
            text-align: center;
            color: white;
        }
        
        .phone-screen h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            font-weight: 700;
        }
        
        .phone-screen p {
            margin-bottom: 30px;
            color: rgba(255, 255, 255, 0.9);
        }
        
        .app-logo {
            width: 90px;
            height: 90px;
            background: white;
            border-radius: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 30px;
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
        }
        
        .app-logo-inner {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 28px;
        }
        
        /* 特性部分 */
        .features {
            padding: 100px 0;
            background-color: white;
        }
        
        .section-header {
            text-align: center;
            margin-bottom: 70px;
        }

        
        .section-header h2 {
            font-size: 2.8rem;
            margin-bottom: 20px;
            color: var(--dark);
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
        }
        
        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
        }
        
        .section-header p {
            color: #6c757d;
            max-width: 700px;
            margin: 0 auto;
            font-size: 1.2rem;
            line-height: 1.8;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 35px;
        }
        
        .feature-card {
            background: var(--light);
            border-radius: var(--border-radius);
            padding: 45px 35px;
            text-align: center;
            transition: var(--transition);
            box-shadow: var(--box-shadow);
            border: 1px solid rgba(0, 0, 0, 0.03);
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            width: 90px;
            height: 90px;
            margin: 0 auto 30px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 36px;
            box-shadow: 0 8px 20px rgba(58, 134, 255, 0.25);
        }
        
        .feature-card h3 {
            font-size: 1.6rem;
            margin-bottom: 20px;
            color: var(--dark);
        }
        
        .feature-card p {
            color: #6c757d;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        
        /* 下载区域 */
        .download {
            padding: 100px 0;
            background: linear-gradient(135deg, #f0f7ff 0%, #e6f0ff 100%);
            text-align: center;
        }
        
        .download-content {
            max-width: 900px;
            margin: 0 auto;
        }
        
        .download-options {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 60px;
            flex-wrap: wrap;
        }
        
        .download-option {
            background: white;
            border-radius: var(--border-radius);
            padding: 40px 30px;
            width: 280px;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.03);
        }
        
        .download-option:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
        }
        
        .option-icon {
            font-size: 54px;
            margin-bottom: 25px;
            color: var(--primary);
            text-shadow: 0 5px 15px rgba(58, 134, 255, 0.2);
        }
        
        .option-title {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--dark);
            font-weight: 700;
        }
        
        .qr-container {
            margin: 25px 0;
            padding: 15px;
            background: white;
            border-radius: 12px;
            display: inline-block;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .qr-code {
            width: 160px;
            height: 160px;
            background: #f8f9fa;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            font-weight: bold;
            color: #6c757d;
            border: 1px solid var(--medium-gray);
            overflow: hidden;
        }
        
        .qr-code img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        /* 用户评价 */
        .testimonials {
            padding: 100px 0;
            background-color: white;
        }
        
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 40px;
        }
        
        .testimonial-card {
            background: var(--light);
            border-radius: var(--border-radius);
            padding: 40px 35px;
            box-shadow: var(--box-shadow);
            position: relative;
            border: 1px solid rgba(0, 0, 0, 0.03);
        }
        
        .testimonial-card::before {
            content: '"';
            position: absolute;
            top: 25px;
            left: 25px;
            font-size: 80px;
            color: var(--primary-light);
            opacity: 0.15;
            font-family: serif;
            line-height: 1;
        }
        
        .testimonial-content {
            margin-bottom: 25px;
            color: #495057;
            position: relative;
            z-index: 1;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .author-avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 24px;
            flex-shrink: 0;
        }
        
        .author-info h4 {
            font-size: 1.2rem;
            color: var(--dark);
            margin-bottom: 5px;
        }
        
        .author-info p {
            color: #6c757d;
            font-size: 0.95rem;
        }
        
        .rating {
            color: #ffc107;
            margin-top: 5px;
            font-size: 18px;
        }
        
        /* 常见问题 */
        .faq {
            padding: 100px 0;
            background: linear-gradient(135deg, #f0f7ff 0%, #e6f0ff 100%);
        }
        
        .faq-grid {
            max-width: 900px;
            margin: 0 auto;
        }
        
        .faq-item {
            background: white;
            border-radius: var(--border-radius);
            margin-bottom: 25px;
            overflow: hidden;
            box-shadow: var(--box-shadow);
            border: 1px solid rgba(0, 0, 0, 0.03);
        }
        
        .faq-question {
            padding: 28px 35px;
            font-size: 1.3rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--dark);
            background: white;
        }
        
        .faq-answer {
            padding: 0 35px 30px;
            color: #495057;
            display: none;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        
        .faq-item.active .faq-answer {
            display: block;
        }
        
        .faq-question i {
            transition: var(--transition);
            color: var(--primary);
        }
        
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        
        /* 页脚 */
        footer {
            background: var(--dark);
            color: white;
            padding: 80px 0 40px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 50px;
            margin-bottom: 50px;
        }
        
        .footer-column h3 {
            font-size: 1.4rem;
            margin-bottom: 30px;
            position: relative;
            padding-bottom: 15px;
        }
        
        .footer-column h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 15px;
        }
        
        .footer-links a {
            color: #adb5bd;
            text-decoration: none;
            transition: var(--transition);
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .footer-links a i {
            width: 24px;
            text-align: center;
        }
        
        .footer-links a:hover {
            color: var(--primary);
            padding-left: 5px;
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 25px;
        }
        
        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            color: white;
            font-size: 18px;
            transition: var(--transition);
        }
        
        .social-links a:hover {
            background: var(--primary);
            transform: translateY(-3px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid #343a40;
            color: #6c757d;
            font-size: 1rem;
        }
        .copyright a{ color:#fff; font-size:14px; list-style:none}
        /* 响应式设计 */
        @media (max-width: 1200px) {
            .hero {
                gap: 50px;
            }
            
            .hero h1 {
                font-size: 3.2rem;
            }
        }
        
        @media (max-width: 992px) {
            .hero {
                flex-direction: column;
                padding: 140px 0 60px;
                text-align: center;
            }
            
            .hero-content {
                padding-right: 0;
                margin-bottom: 50px;
            }
            
            .hero p, .hero-stats {
                margin: 0 auto;
                justify-content: center;
            }
            
            .hero-buttons {
                justify-content: center;
            }
            
            .section-header h2 {
                font-size: 2.5rem;
            }
            .stat-value {
    font-size: 1.5rem;
}
.btn {
    padding: 10px 36px;
    font-size: 1rem;
}
        }
        
        @media (max-width: 768px) {
            .container {
                padding: 0 25px;
            }
            
            .nav-links {
                display: none;
            }
            
            .hero h1 {
                font-size: 2rem;
            }
            
            .hero p {
                font-size: 1.1rem;
            }
            
            .section-header h2 {
                font-size: 2.2rem;
            }
            
            .feature-card, .download-option {
                padding: 35px 25px;
            }
            
            .testimonial-card {
                padding: 35px 30px;
            }
        }