:root {
            --primary: #5A5E6B;
            --primary-dark: #3D404B;
            --secondary: #F5C45E;
            --accent: #E96E4B;
            --dark: #2C2F33;
            --light: #F8F9FA;
            --gray: #6C757D;
            --gray-light: #E9ECEF;
            --success: #5CB85C;
            --border-radius: 16px;
            --shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
            --gradient-primary: linear-gradient(135deg, #5A5E6B, #3D404B);
            --gradient-accent: linear-gradient(135deg, #F5C45E, #E96E4B);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: var(--light);
            overflow-x: hidden;
        }
        
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        section {
            padding: 100px 0;
        }
        
        /* 导航栏 */
        header {
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(15px);
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }
        
        .header-scrolled {
            padding: 8px 0;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
        }
        
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--dark);
            text-decoration: none;
        }
        
        .logo-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.4rem;
        }
        .logo-icon img{max-height:62px;}
        
        .logo:hover .logo-icon {
            transform: rotate(5deg) scale(1.05);
        }
        
        .nav-links {
            display: flex;
            gap: 40px;
            list-style: none;
        }
        
        .nav-links a {
            color: var(--dark);
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            position: relative;
        }
        
        .nav-links a:hover {
            color: var(--primary);
        }
        
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--gradient-accent);
            border-radius: 3px;
            transition: width 0.3s ease;
        }
        
        .nav-links a:hover::after {
            width: 100%;
        }
        
        .nav-cta {
            background: var(--gradient-accent);
            color: white;
            border: none;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 6px 20px rgba(233, 110, 75, 0.3);
        }
        
        .nav-cta:hover {
            transform: translateY(-4px);
            box-shadow: 0 10px 30px rgba(233, 110, 75, 0.4);
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--dark);
            cursor: pointer;
        }
        
        /* 英雄区域 */
        .hero {
            background: linear-gradient(145deg, #F1F3F5, #FFFFFF);
            padding-top: 160px;
            padding-bottom: 100px;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -200px;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(245, 196, 94, 0.1) 0%, rgba(245, 196, 94, 0) 70%);
            border-radius: 50%;
            z-index: 0;
        }
        
        .hero-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 60px;
            position: relative;
            z-index: 1;
        }
        
        .hero-text {
            flex: 1;
            max-width: 600px;
        }
        
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(90, 94, 107, 0.1);
            color: var(--primary);
            padding: 10px 20px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            margin-bottom: 30px;
        }
        
        .hero-title {
            font-size: 3.8rem;
            font-weight: 900;
            line-height: 1.1;
            margin-bottom: 25px;
            color: var(--dark);
            letter-spacing: -1px;
        }
        
        .hero-title span {
            background: var(--gradient-accent);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .hero-description {
            font-size: 1.3rem;
            color: var(--gray);
            margin-bottom: 45px;
            max-width: 550px;
            line-height: 1.8;
        }
        
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-bottom: 50px;
        }
        
        .stat-item {
            text-align: left;
        }
        
        .stat-value {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--primary);
            margin-bottom: 8px;
            line-height: 1;
        }
        
        .stat-label {
            color: var(--gray);
            font-weight: 600;
            font-size: 0.95rem;
        }
        
        .hero-buttons {
            display: flex;
            gap: 25px;
            flex-wrap: wrap;
        }
        
        .btn-primary {
            background: var(--gradient-accent);
            color: white;
            border: none;
            padding: 18px 40px;
            border-radius: 14px;
            font-weight: 800;
            font-size: 1.2rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            box-shadow: 0 12px 30px rgba(233, 110, 75, 0.3);
        }
        
        .btn-primary:hover {
            transform: translateY(-6px);
            box-shadow: 0 18px 45px rgba(233, 110, 75, 0.4);
        }
        
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 18px 40px;
            border-radius: 14px;
            font-weight: 800;
            font-size: 1.2rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
        }
        
        .btn-secondary:hover {
            background: rgba(90, 94, 107, 0.05);
            transform: translateY(-4px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
        }
        
        .hero-visual {
            flex: 1;
            max-width: 550px;
            position: relative;
        }
        
        .software-preview {
            background: white;
            border-radius: 24px;
            padding: 30px;
            box-shadow: var(--shadow);
            transform: perspective(1200px) rotateY(-8deg) rotateX(4deg);
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.05);
        }
        
        .software-preview:hover {
            transform: perspective(1200px) rotateY(-4deg) rotateX(2deg);
            box-shadow: var(--shadow-hover);
        }
        
        .preview-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 25px;
            padding-bottom: 20px;
            border-bottom: 1px dashed rgba(0, 0, 0, 0.1);
        }
        
        .preview-header h4 {
            font-weight: 800;
            color: var(--dark);
            font-size: 1.3rem;
        }
        
        .version-badge {
            background: var(--gradient-accent);
            color: white;
            padding: 4px 12px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 700;
            margin-left: auto;
        }
        
        .preview-body {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            font-size: 0.95rem;
        }
        
        .preview-item {
            background: #F8F9FA;
            border-radius: 12px;
            padding: 15px;
            text-align: center;
            transition: var(--transition);
        }
        
        .preview-item:hover {
            background: #E9ECEF;
            transform: translateY(-3px);
        }
        
        .preview-icon {
            font-size: 1.8rem;
            color: var(--accent);
            margin-bottom: 8px;
        }
        
        .preview-label {
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 4px;
        }
        
        .preview-value {
            color: var(--gray);
            font-size: 0.85rem;
        }
        
        /* 核心功能 */
        .features {
            background: white;
        }
        
        .section-title {
            text-align: center;
            font-size: 3rem;
            font-weight: 900;
            margin-bottom: 20px;
            color: var(--dark);
            letter-spacing: -0.5px;
        }
        
        .section-subtitle {
            text-align: center;
            color: var(--gray);
            font-size: 1.2rem;
            max-width: 750px;
            margin: 0 auto 70px;
            line-height: 1.8;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 40px;
        }
        
        .feature-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 45px 35px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.05);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 6px;
            background: var(--gradient-accent);
            opacity: 0;
            transition: var(--transition);
        }
        
        .feature-card:hover {
            transform: translateY(-12px);
            box-shadow: var(--shadow-hover);
        }
        
        .feature-card:hover::before {
            opacity: 1;
        }
        
        .feature-icon {
            width: 80px;
            height: 80px;
            background: rgba(245, 196, 94, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 30px;
            font-size: 2.2rem;
            color: var(--accent);
            transition: var(--transition);
        }
        
        .feature-card:hover .feature-icon {
            background: var(--gradient-accent);
            color: white;
            transform: rotateY(180deg);
        }
        
        .feature-card h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 20px;
            color: var(--dark);
        }
        .feature-card h3 a{text-decoration:none;color:#666;}
        .feature-card p {
            color: var(--gray);
            line-height: 1.8;
            font-size: 1.05rem;
        }
        
        /* 特色亮点 */
        .highlights {
            background: linear-gradient(145deg, #F1F3F5, #FFFFFF);
        }
        
        .highlights-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 60px;
        }
        
        .highlight-item {
            background: white;
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border-left: 6px solid var(--accent);
        }
        
        .highlight-item:hover {
            transform: translateX(10px);
            box-shadow: var(--shadow-hover);
        }
        
        .highlight-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 20px;
        }
        
        .highlight-item h4 {
            font-size: 1.4rem;
            font-weight: 800;
            margin-bottom: 15px;
            color: var(--dark);
        }
        
        .highlight-item p {
            color: var(--gray);
            line-height: 1.7;
        }
        
        /* 与PS对比 */
        .comparison {
            background: white;
        }
        
        .comparison-table {
            max-width: 900px;
            margin: 60px auto 0;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        
        .comparison-row {
            display: flex;
            border-bottom: 1px solid var(--gray-light);
            background: white;
        }
        
        .comparison-row:last-child {
            border-bottom: none;
        }
        
        .comparison-header {
            background: var(--gradient-primary);
            color: white;
        }
        
        .comparison-header .comparison-item {
            font-weight: 800;
            font-size: 1.1rem;
        }
        
        .comparison-item {
            flex: 1;
            padding: 20px 25px;
            font-size: 1rem;
        }
        
        .comparison-item:first-child {
            flex: 0.8;
            background: rgba(0, 0, 0, 0.02);
            font-weight: 600;
        }
        
        .comparison-item.highlight {
            background: rgba(245, 196, 94, 0.1);
        }
        
        .comparison-item i.fa-check {
            color: var(--success);
            font-size: 1.2rem;
        }
        
        .comparison-item i.fa-times {
            color: #DC3545;
            font-size: 1.2rem;
        }
        
        /* 平台支持 */
        .platforms {
            background: linear-gradient(145deg, #2C2F33, #3D404B);
            color: white;
        }
        
        .platforms .section-title {
            color: white;
        }
        
        .platforms .section-subtitle {
            color: rgba(255, 255, 255, 0.8);
        }
        
        .platforms-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-top: 60px;
        }
        
        .platform-card {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            padding: 40px 30px;
            text-align: center;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .platform-card:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-10px);
        }
        
        .platform-icon {
            font-size: 3rem;
            margin-bottom: 25px;
        }
        
        .platform-card h4 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 10px;
        }
        
        .platform-card p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
        }
        
        /* 安装教程 */
        .install {
            background: white;
        }
        
        .install-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-top: 60px;
        }
        
        .step-card {
            background: var(--light);
            border-radius: 20px;
            padding: 35px;
            position: relative;
            border: 1px solid rgba(0, 0, 0, 0.05);
        }
        
        .step-number {
            width: 50px;
            height: 50px;
            background: var(--gradient-accent);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 900;
            margin-bottom: 25px;
        }
        
        .step-card h4 {
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 15px;
            color: var(--dark);
        }
        
        .step-card p {
            color: var(--gray);
            line-height: 1.7;
        }
        
        /* CTA区域 */
        .cta-section {
            background: var(--gradient-accent);
            color: white;
            text-align: center;
            padding: 120px 0;
            position: relative;
            overflow: hidden;
        }
        
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
            border-radius: 50%;
        }
        
        .cta-title {
            font-size: 3.5rem;
            font-weight: 900;
            margin-bottom: 30px;
            position: relative;
            z-index: 1;
        }
        
        .cta-description {
            font-size: 1.4rem;
            max-width: 800px;
            margin: 0 auto 60px;
            opacity: 0.95;
            position: relative;
            z-index: 1;
        }
        
        .cta-button {
            background: white;
            color: var(--accent);
            border: none;
            padding: 22px 60px;
            border-radius: 16px;
            font-weight: 900;
            font-size: 1.4rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 20px;
            text-decoration: none;
            position: relative;
            z-index: 1;
            box-shadow: 0 15px 40px rgba(0,0,0,0.2);
            margin-top:20px;
        }
        
        .cta-button:hover {
            transform: translateY(-8px) scale(1.05);
            box-shadow: 0 25px 60px rgba(0,0,0,0.3);
        }
        
        /* 下载区域 */
        .download-section {
            background: white;
            text-align: center;
        }
        
        .download-card {
            max-width: 500px;
            margin: 60px auto 0;
            background: white;
            border-radius: 32px;
            padding: 50px;
            box-shadow: var(--shadow);
            border: 2px solid transparent;
            transition: var(--transition);
        }
        
        .download-card:hover {
            transform: translateY(-15px);
            box-shadow: var(--shadow-hover);
            border-color: var(--accent);
        }
        
        .download-version {
            font-size: 1.1rem;
            color: var(--accent);
            font-weight: 700;
            margin-bottom: 15px;
        }
        
        .download-title {
            font-size: 2.5rem;
            font-weight: 900;
            margin-bottom: 20px;
            color: var(--dark);
        }
        
        .download-meta {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-bottom: 40px;
            color: var(--gray);
            font-size: 1.1rem;
        }
        
        .download-meta i {
            color: var(--accent);
            margin-right: 8px;
        }
        
        .download-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }
        
        .download-btn {
            background: var(--gradient-accent);
            color: white;
            padding: 16px 40px;
            border-radius: 14px;
            font-weight: 800;
            font-size: 1.1rem;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
            box-shadow: 0 10px 30px rgba(233, 110, 75, 0.3);
        }
        
        .download-btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(233, 110, 75, 0.4);
        }
        
        .download-btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            box-shadow: none;
        }
        
        .download-btn-outline:hover {
            background: rgba(90, 94, 107, 0.05);
            transform: translateY(-5px);
        }
        
        .security-badge {
            margin-top: 30px;
            display: flex;
            justify-content: center;
            gap: 20px;
            color: var(--gray);
            font-size: 0.95rem;
        }
        
        .security-badge i {
            color: var(--success);
            margin-right: 5px;
        }
        
        /* 用户评价 */
        .testimonials {
            background: linear-gradient(145deg, #F1F3F5, #FFFFFF);
        }
        
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 60px;
        }
        
        .testimonial-card {
            background: white;
            border-radius: 24px;
            padding: 35px;
            box-shadow: var(--shadow);
            position: relative;
        }
        
        .testimonial-card::before {
            content: '"';
            position: absolute;
            top: 20px;
            right: 30px;
            font-size: 6rem;
            color: rgba(245, 196, 94, 0.2);
            font-family: serif;
        }
        
        .testimonial-text {
            font-size: 1.1rem;
            color: var(--gray);
            line-height: 1.8;
            margin-bottom: 25px;
            font-style: italic;
        }
        
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .author-avatar {
            width: 50px;
            height: 50px;
            background: var(--gradient-accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 700;
            font-size: 1.2rem;
        }
        
        .author-info h5 {
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 5px;
        }
        
        .author-info p {
            color: var(--gray);
            font-size: 0.9rem;
        }
        
        /* 页脚 */
        footer {
            background: var(--dark);
            color: white;
            padding: 80px 0 40px;
        }
        
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 60px;
            margin-bottom: 60px;
        }
        
        .footer-col {
            flex: 1;
            min-width: 200px;
        }
        
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 800;
            font-size: 1.8rem;
            margin-bottom: 25px;
        }
        
        .footer-description {
            opacity: 0.7;
            line-height: 1.8;
            margin-bottom: 30px;
        }
        
        .footer-links h4 {
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 25px;
        }
        
        .footer-links ul {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 15px;
        }
        
        .footer-links a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: var(--transition);
        }
        
        .footer-links a:hover {
            color: white;
            padding-left: 8px;
        }
        
        .copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            opacity: 0.7;
            font-size: 0.95rem;
        }
        
            .open-btn {
            background: var(--gradient-accent);
            color: white;
            border: none;
            padding: 14px 40px;
            font-size: 1.2rem;
            font-weight: 500;
            border-radius: 60px;
            cursor: pointer;
            box-shadow: 0 10px 20px -8px rgba(0,20,40,0.3);
            transition: all 0.2s ease;
            border: 1px solid rgba(255,255,255,0.2);
            letter-spacing: 0.3px;
        }
        
                /* ---------- 模态框（弹窗）样式 ---------- */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(10, 20, 30, 0.6);
            backdrop-filter: blur(5px);
            -webkit-backdrop-filter: blur(5px);
            align-items: center;
            justify-content: center;
            z-index: 1000;
            transition: background-color 0.2s;
        }

        .modal.show {
            display: flex;
        }

        /* 弹窗内容卡片 — 调整内边距，适应两列布局 */
        .modal-content {
			background: #fff;
            position: relative;
             width: 90%;
            max-width: 600px;     
            border-radius: 28px;
            box-shadow: 0 30px 60px rgba(0, 10, 20, 0.4);
            animation: fadeScale 0.25s ease-out;
            padding: 20px 30px 20px 30px;   /* 统一内边距，不再让图片贴顶 */
        }

        @keyframes fadeScale {
            0% { opacity: 0; transform: scale(0.92); }
            100% { opacity: 1; transform: scale(1); }
        }

        /* 双列容器：使用 grid 实现并排，间隙20px */
        .image-grid {
            display: flex;
			justify-content: space-around;
          /*  grid-template-columns: 1fr 1fr; */
            gap: 24px;
            margin-top: 10px;           /* 与关闭按钮保持距离 */
        }

        /* 每个图片卡片 */
        .image-card {
            display: flex;
            flex-direction: column;
            background: #fafcff;         /* 极浅底色，柔和区分 */
            border-radius: 20px;
            overflow: hidden;            /* 圆角裁切图片 */
            box-shadow: 0 6px 14px rgba(0,0,0,0.02);
            transition: transform 0.2s ease;
        }

        .image-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px rgba(0,20,30,0.1);
        }

        /* 图片设置：固定宽高比，让所有图片高度一致 */
        .image-card img {
            display: block;
            max-width: 200px;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            background-color: #eef2f6;     /* 加载中的占位色 */
        }

        /* 图片下方的文字说明 */
        .image-caption {
            padding: 16px 14px 18px 14px;
            text-align: center;
            font-size: 1rem;
            line-height: 1.5;
            color: #1e2b3a;
            font-weight: 450;
            background: #ffffff;
            border-radius: 0 0 20px 20px;
        }

        .image-caption span {
            display: block;
            font-size: 0.9rem;
            color: #5b6f82;
            margin-top: 4px;
            font-weight: 400;
            opacity: 0.8;
        }

        /* 关闭按钮 — 调整为绝对定位在卡片右上角，不覆盖内容 */
        .close-btn {
            position: absolute;
            top: 10px;
            right: 10px;
            width: 44px;
            height: 44px;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: none;
            border-radius: 50%;
            font-size: 32px;
            line-height: 1;
            color: #1e2b3a;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 18px rgba(0, 0, 0, 0.1), 0 0 0 1px rgba(255,255,255,0.8);
            transition: all 0.15s;
            z-index: 20;
            padding: 0;
        }

        .close-btn:hover {
            background: rgba(255, 255, 255, 1);
            transform: scale(1.1) rotate(90deg);
            color: #000;
            box-shadow: 0 12px 22px rgba(0, 0, 0, 0.15);
        }

        /* 小提示 (底部装饰) */
        .hint {
            margin-top: 30px;
            font-size: 0.9rem;
            color: #4a5e71;
            opacity: 0.6;
            display: flex;
            gap: 6px;
            align-items: center;
            justify-content: center;
        }

        .hint i {
            font-style: normal;
            background: #d0dbe8;
            border-radius: 30px;
            padding: 4px 12px;
        }
/* ====== 沉没成本弹窗样式 ====== */
.download-icon-animate {
    position: relative;
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
}
.download-circle {
    position: absolute;
    padding: 30px;
    border: 4px solid #e2e8f0;
    border-top-color: var(--accent, #3498db);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.download-icon {
    position: absolute;
    display: flex;
    padding: 14px 20px 28px 20px;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--accent, #3498db);
}
.progress-bar-wrap {
    width: 100%;
    height: 10px;
    background: #e2e8f0;
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 10px;
}
.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #3498db, #2ecc71);
    border-radius: 5px;
    transition: width 0.1s ease;
}
.progress-percent {
    text-align: center;
    font-size: 24px;
    font-weight: 800;
    color: var(--accent, #3498db);
    margin-bottom: 6px;
}
.progress-status {
    text-align: center;
    font-size: 15px;
    color: #64748b;
    margin-bottom: 16px;
}
.progress-tips {
    text-align: center;
    font-size: 13px;
    color: #94a3b8;
}
.progress-tips strong { color: #ef4444; }
.ready-header { text-align: center; margin-bottom: 20px; }
.ready-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: #22c55e;
    color: #fff;
    font-size: 24px;
    border-radius: 50%;
    margin-bottom: 10px;
}
.ready-title {
    font-size: 20px;
    font-weight: 700;
    color: #1e293b;
    margin: 0 0 6px;
}
.ready-sub {
    font-size: 14px;
    color: #64748b;
    margin: 0;
}
.security-note {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 13px;
    color: #22c55e;
}
.scan-hint {
    text-align: center;
    color: #94a3b8;
    font-size: 13px;
    margin: 12px 0 8px;
}
.copy-link-wrap {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 4px;
}
.copy-link-btn {
    padding: 7px 14px;
    font-size: 13px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    background: #f8fafc;
    color: #475569;
    cursor: pointer;
    transition: all 0.2s;
}
.copy-link-btn:hover {
    background: #e2e8f0;
    border-color: #94a3b8;
}
.preparing-phase { text-align: center; }
.ready-phase { text-align: center; }
/* 最简单的回到顶部按钮 */
        #goTopBtn {
            position: fixed;
            bottom: 24px;
            right: 24px;
            width: 48px;
            height: 48px;
            background:var(--gradient-accent);
            border: none;
            border-radius: 40px;
            color: white;
            font-size: 28px;
            font-weight: bold;
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(0,0,0,0.2);
            transition: 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.2s, visibility 0.2s;
            z-index: 999;
        }
        #goTopBtn.show {
            opacity: 1;
            visibility: visible;
        }
        #goTopBtn:hover {
            background-color: #1d4e76;
            transform: scale(1.02);
        }
        
        /* 响应式 */
        @media (max-width: 1024px) {
            .hero-content {
                flex-direction: column;
            }
            
            .hero-text, .hero-visual {
                max-width: 100%;
            }
            
            .hero-visual {
                order: -1;
                margin-bottom: 50px;
            }
            
            .software-preview {
                transform: none;
            }
        }
        
        @media (max-width: 768px) {
            .hero-title {
                font-size: 3rem;
            }
            
            .section-title {
                font-size: 2.5rem;
            }
            
            .nav-links {
                display: none;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .hero-buttons {
                flex-direction: column;
                align-items: stretch;
            }
            
            .btn-primary, .btn-secondary {
                text-align: center;
                justify-content: center;
            }
            
            .hero-stats {
                flex-direction: column;
                gap: 30px;
            }
            
            .stat-item {
                text-align: center;
            }
            
            .comparison-row {
                flex-direction: column;
            }
            
            .comparison-item {
                padding: 15px;
            }
        }
                /* 移动端适配：小于600px时两列堆叠为一列 */
        @media (max-width: 600px) {
            .modal-content {
                padding: 20px 16px;
                max-width: 400px;
            }
            .image-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                margin-top:30px;
            }
            .image-card img {
            }
            .close-btn {
                top: 12px;
                right: 12px;
                width: 40px;
                height: 40px;
                font-size: 30px;
            }
        }

        @media (max-width: 480px) {
            .hero-title {
                font-size: 2.5rem;
            }
            
            .download-meta {
                flex-direction: column;
                gap: 10px;
            }
            
            .download-buttons {
                flex-direction: column;
            }
            
            .download-btn {
                width: 100%;
                justify-content: center;
            }
        }