:root {
            --primary: #4361ee;
            --primary-light: #4cc9f0;
            --secondary: #7209b7;
            --accent: #f72585;
            --light: #f8f9fa;
            --dark: #212529;
            --gradient-start: #4361ee;
            --gradient-end: #3a0ca3;
            --transition: all 0.3s ease;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--dark);
            background: linear-gradient(135deg, #fafbff 0%, #f0f4ff 100%);
            line-height: 1.6;
            overflow-x: hidden;
        }
        
        /* 优化后的Header部分 - 轻快时尚 */
        .hero-section {
            position: relative;
            overflow: hidden;
            padding: 8rem 0 6rem;
            background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
            color: white;
            border-radius: 0 0 100px 100px;
            margin-bottom: 4rem;
            box-shadow: 0 20px 40px rgba(67, 97, 238, 0.3);
        }
        
        .hero-content {
            position: relative;
            z-index: 2;
        }

        /* 语言切换器样式 */
        .language-switcher {
            position: absolute;
            top: 20px;
            right: 20px;
            z-index: 10;
            display: flex;
            gap: 15px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(5px);
            padding: 8px 15px;
            border-radius: 30px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        
        .language-switcher a {
            color: white;
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 500;
            padding: 4px 8px;
            border-radius: 15px;
            transition: all 0.3s ease;
        }
        
        .language-switcher a:hover {
            background: rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
        }

        .language-switcher .active {
            background: rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
        }        
        
        .hero-pattern {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0.1;
            background-image: 
                radial-gradient(circle at 10% 20%, var(--primary-light) 0%, transparent 20%),
                radial-gradient(circle at 90% 80%, var(--accent) 0%, transparent 25%),
                radial-gradient(circle at 30% 60%, #fff 0%, transparent 15%);
        }
        
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
            position: relative;
            display: inline-block;
        }
        
        .hero-title::after {
            content: "";
            position: absolute;
            bottom: -10px;
            left: 0;
            width: 80px;
            height: 5px;
            background: var(--primary-light);
            border-radius: 3px;
        }
        
        .hero-subtitle {
            font-size: 1.5rem;
            font-weight: 300;
            margin-bottom: 2.5rem;
            max-width: 700px;
        }
        
        .cta-buttons {
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        
        .btn-primary-custom {
            background: white;
            color: var(--primary);
            border: none;
            padding: 0.9rem 2.5rem;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn-outline-custom {
            background: transparent;
            color: white;
            border: 2px solid rgba(255, 255, 255, 0.5);
            padding: 0.9rem 2.5rem;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .btn-outline-custom:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: white;
        }
        
        .hero-image-container {
            position: relative;
            perspective: 1000px;
        }
        
        .hero-image {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.15) 0%, rgba(255, 255, 255, 0.05) 100%);
            border-radius: 20px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            transform: rotateY(-5deg);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
            overflow: hidden;
            position: relative;
        }
        
        .floating-icons {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
        }
        
        .floating-icon {
            position: absolute;
            font-size: 2rem;
            opacity: 0.6;
            animation: float 15s infinite linear;
        }
        
        .floating-icon:nth-child(1) {
            top: 20%;
            left: 15%;
            animation-delay: 0s;
            color: #ff9e00;
        }
        
        .floating-icon:nth-child(2) {
            top: 60%;
            left: 80%;
            animation-delay: -3s;
            color: #4cc9f0;
        }
        
        .floating-icon:nth-child(3) {
            top: 40%;
            left: 50%;
            animation-delay: -5s;
            color: #f72585;
        }
        
        .floating-icon:nth-child(4) {
            top: 70%;
            left: 30%;
            animation-delay: -7s;
            color: #7209b7;
        }
        
        @keyframes float {
            0% {
                transform: translateY(0) rotate(0deg);
            }
            25% {
                transform: translateY(-20px) rotate(10deg);
            }
            50% {
                transform: translateY(0px) rotate(0deg);
            }
            75% {
                transform: translateY(20px) rotate(-10deg);
            }
            100% {
                transform: translateY(0) rotate(0deg);
            }
        }
        
        .hero-image-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 2rem;
        }
        
        .hero-image-content i {
            font-size: 4rem;
            margin-bottom: 1.5rem;
            color: white;
            opacity: 0.8;
        }
        
        .hero-image-content h3 {
            font-size: 1.8rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: white;
        }
        
        .hero-image-content p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
        }
        
        /* 波浪效果 */
        .wave {
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 100%;
            overflow: hidden;
            line-height: 0;
            transform: rotate(180deg);
        }
        
        .wave svg {
            position: relative;
            display: block;
            width: calc(100% + 1.3px);
            height: 100px;
        }
        
        .wave .shape-fill {
            fill: #fafbff;
        }
        
        /* 通用样式 */
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 2rem;
            font-size: 2rem;
            font-weight: 700;
        }
        
        .section-title::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
        }
        
        .container {
            max-width: 1200px;
        }
        
        /* 功能卡片 */
        .feature-card {
            height: 100%;
            transition: var(--transition);
            border: none;
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            border-radius: 12px;
            overflow: hidden;
        }
        
        .icon-circle {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
        }
        
        /* 上手指南 */
        .step-card {
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            border-radius: 12px;
            margin-bottom: 1.5rem;
            transition: var(--transition);
            min-height: 160px;
        }
        
        .step-number {
            width: 40px;
            height: 40px;
            flex-shrink: 0;
            font-weight: bold;
            font-size: 1.2rem;
        }
        
        /* 功能截图 */
        .screenshot-placeholder {
            height: 250px;
            background: linear-gradient(135deg, #ffffff 0%, #f0f4ff 100%); /* Lighter, more modern gradient */
            border-radius: 15px; /* Slightly more rounded */
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            border: 1px solid rgba(67, 97, 238, 0.1); /* Solid, subtle border */
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08); /* More prominent shadow */
            transition: all 0.4s ease; /* Smoother transition */
            overflow: hidden; /* Ensure content stays within rounded corners */
            position: relative; /* For potential overlay effects */
        }
        
        .screenshot-placeholder:hover {
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15); /* Stronger shadow on hover */
            background: linear-gradient(135deg, #f0f4ff 0%, #e6eaff 100%); /* Subtle background change on hover */
        }
        
        .screenshot-placeholder i {
            font-size: 4.5rem; /* Slightly larger icon */
            margin-bottom: 1.2rem;
            color: var(--primary-light); /* Use a lighter primary color for the icon */
            text-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        
        .screenshot-placeholder p {
            font-size: 1.3rem; /* Slightly larger text */
            font-weight: 600; /* Bolder text */
            color: var(--dark); /* Darker text for better contrast */
        }
        
        /* 应用场景 */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 1.5rem;
        }
        
        .feature-grid .card {
            border: 1px solid rgba(0,0,0,0.05); /* Add a subtle border */
            border-radius: 15px; /* Slightly more rounded */
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.06); /* Slightly stronger initial shadow */
            transition: all 0.4s ease; /* Smoother transition */
            background-color: white; /* Ensure white background */
        }
        
        .feature-grid .card-body {
            padding: 2rem; /* Increase padding for more breathing room */
        }
        
        .badge-icon {
            display: inline-flex; /* Use flex for better centering */
            align-items: center;
            justify-content: center;
            width: 45px; /* Slightly larger */
            height: 45px; /* Slightly larger */
            background: linear-gradient(45deg, var(--primary) 0%, var(--secondary) 100%); /* Gradient background */
            color: white;
            border-radius: 12px; /* Slightly more rounded */
            font-size: 1.2rem; /* Icon size */
            margin-right: 15px; /* More space */
            box-shadow: 0 5px 15px rgba(0,0,0,0.1); /* Add shadow */
        }
        
        /* 最佳实践 */
        .best-practice-card {
            border-radius: 12px;
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .list-group-item {
            padding: 1.25rem 1.5rem;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }
        
        /* 意见反馈 */
        .feedback-card {
            border-radius: 12px;
            border: 2px solid var(--primary);
            box-shadow: 0 10px 30px rgba(67, 97, 238, 0.15);
            overflow: hidden;
        }
        
        .contact-box {
            background: rgba(248, 249, 250, 0.8);
            border-radius: 12px;
            padding: 1.5rem;
            height: 100%;
            transition: var(--transition);
        }
        
        .contact-box:hover {
            background: white;
            box-shadow: 0 10px 25px rgba(0,0,0,0.08);
        }
        
        /* 安装部分 */
        .install-section {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-radius: 30px;
            padding: 5rem 0;
            margin: 4rem 0;
            position: relative;
            overflow: hidden;
        }
        
        .install-card {
            background: white;
            border-radius: 20px;
            padding: 2rem;
            transform: rotate(3deg);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            position: relative;
            z-index: 2;
        }
        
        .install-badge {
            position: absolute;
            top: 0;
            left: 0;
            background: var(--primary);
            color: white;
            padding: 0.5rem 1.5rem;
            border-radius: 0 0 20px 0;
            font-weight: bold;
            z-index: 3;
        }
        
        /* 应用场景优化样式 */
   
        .use-case-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
            gap: 2rem;
        }
        
        .use-case-card {
            background: white;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 15px 35px rgba(0,0,0,0.08);
            position: relative;
            z-index: 1;
            border: none;
            transition: box-shadow 0.3s ease;
        }
        
        .use-case-card:hover {
            box-shadow: 0 20px 40px rgba(0,0,0,0.12);
        }
        
        .card-header {
            padding: 1.5rem 1.5rem 0.5rem;
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .card-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: white;
            box-shadow: 0 8px 20px rgba(67, 97, 238, 0.3);
        }
        
        .card-title {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--dark);
            margin: 0;
        }
        
        .card-body {
            padding: 1.5rem;
        }
        
        .role-list {
            list-style: none;
            padding: 0;
            margin: 0 0 1.5rem 0;
        }
        
        .role-list li {
            position: relative;
            padding-left: 25px;
            margin-bottom: 12px;
            line-height: 1.5;
        }
        
        .role-name {
            font-weight: 600;
            background: rgba(114, 9, 183, 0.08);
            padding: 0 6px;
            border-radius: 4px;
            display: inline-block;
            margin: 0 3px;
        }
        
        .collaboration {
            background: rgba(67, 97, 238, 0.05);
            border-radius: 10px;
            padding: 15px;
            margin-top: 15px;
            min-height: 99px;
        }
        
        .collaboration-title {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
        }
        
        .use-case-footer {
            background: rgba(248, 249, 250, 0.7);
            padding: 1.2rem 1.5rem;
            border-top: 1px solid rgba(0,0,0,0.05);
        }
        
        .use-case-footer p {
            margin: 0;
            font-weight: 500;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .use-case-footer i {
            color: var(--accent);
        }
        
        /* 响应式调整 */
        @media (max-width: 992px) {
            .hero-section {
                padding: 6rem 0 4rem;
                border-radius: 0 0 70px 70px;
            }
            
            .hero-title {
                font-size: 2.8rem;
            }
            
            .hero-subtitle {
                font-size: 1.3rem;
            }
            
            .feature-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
            
            .use-case-header h2 {
                font-size: 2.2rem;
            }
            
            .use-case-container {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
        }
        
        @media (max-width: 768px) {
            .hero-section {
                padding: 5rem 0 3rem;
                border-radius: 0 0 50px 50px;
            }
            
            .hero-title {
                font-size: 2.3rem;
            }
            
            .hero-subtitle {
                font-size: 1.1rem;
            }
            
            .btn-primary-custom, 
            .btn-outline-custom {
                padding: 0.8rem 1.8rem;
                font-size: 0.9rem;
            }
            
            .hero-image {
                height: 280px;
                margin-top: 2rem;
            }
            
            .feature-grid {
                grid-template-columns: 1fr;
            }
            
            .use-case-section {
                padding: 3rem 0;
                border-radius: 20px;
            }
            
            .use-case-header h2 {
                font-size: 1.8rem;
            }
            
            .use-case-header p {
                font-size: 1rem;
            }
            
            .use-case-container {
                grid-template-columns: 1fr;
            }
            
            .card-icon {
                width: 50px;
                height: 50px;
                font-size: 1.5rem;
            }
        }

        .modal-content {
            border-radius: 15px;
            overflow: hidden;
            border: none;
        }
        
        .modal-header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: white;
            border: none;
        }
        
        .modal-body {
            padding: 0;
        }
        
        .modal-body img {
            width: 100%;
            display: block;
        }
        
        .modal-footer {
            justify-content: space-between;
            background: #f8f9fa;
            border-top: 1px solid #eee;
        }
        
        .screenshot-nav {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-top: 30px;
        }
        
        .nav-btn {
            background: var(--primary);
            color: white;
            border: none;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }
        
        .nav-btn:hover {
            background: var(--secondary);
            transform: scale(1.1);
        }
        
        .screenshot-info {
            padding: 20px;
            background: #f8f9fa;
            border-top: 1px solid #eee;
        }
        
        .screenshot-info h5 {
            margin-bottom: 10px;
            color: var(--dark);
        }
        
        .screenshot-info p {
            margin-bottom: 0;
            color: #666;
        }