:root {
            --primary: #2B5AED;
            --primary-dark: #1A49DC;
            --secondary: #00C1D4;
            --dark: #333333;
            --light: #F5F7FA;
            --gray: #6C757D;
            --light-gray: #E9ECEF;
            --white: #FFFFFF;
            --border: #DEE2E6;
            --bg-color: #f5f7ff;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
        }
        
        body {
            line-height: 1.7;
            color: var(--dark);
            background-color: #fcfcff; 
            position: relative; 
            overflow-x: hidden; 
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background-image: 
                radial-gradient(at 20% 10%, hsla(224, 82%, 60%, 0.15) 0px, transparent 50%),
                radial-gradient(at 80% 20%, hsla(187, 100%, 41%, 0.1) 0px, transparent 50%),
                radial-gradient(at 10% 90%, hsla(224, 82%, 60%, 0.1) 0px, transparent 50%),
                radial-gradient(at 90% 90%, hsla(187, 100%, 41%, 0.15) 0px, transparent 50%);
            z-index: -1; 
            pointer-events: none;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }

        .section {
            padding: 80px 0;
        }
        
        .section.solutions-section {
            background-color: var(--light);
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-header h1 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 15px;
            color: var(--dark);
        }
        
        .section-header .divider {
            width: 60px;
            height: 3px;
            background-color: var(--primary);
            margin: 0 auto 20px;
        }

        .section-header p {
            font-size: 18px;
            color: var(--gray);
            max-width: 800px;
            margin: 0 auto;
        }

        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            text-align: center;
        }
        
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
            text-align: center;
            max-width: 960px;
            margin: 0 auto;
        }

        .grid-item {
            background-color: var(--white);
            padding: 40px 25px;
            border-radius: 8px;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        
        .grid-item:hover {
            transform: translateY(-8px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }
        
        .solutions-section .grid-item {
            background-color: var(--white);
        }

        .item-icon {
            margin-bottom: 25px;
            color: var(--primary);
        }

        .item-icon svg {
            width: 56px;
            height: 56px;
        }

        .grid-item h3 {
            font-size: 22px;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .grid-item p {
            font-size: 15px;
            color: var(--gray);
            line-height: 1.8;
            flex-grow: 1;
        }
        
        .bottom-cta {
            padding: 60px 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: white;
            text-align: center;
        }
        
        .bottom-cta h2 {
            font-size: 32px;
            margin-bottom: 20px;
        }
        
        .bottom-cta p {
            font-size: 18px;
            max-width: 700px;
            margin: 0 auto 30px;
            opacity: 0.9;
        }
        
        .btn {
            display: inline-block;
            padding: 12px 24px;
            background-color: var(--white);
            color: var(--primary);
            text-decoration: none;
            border-radius: 4px;
            font-weight: 500;
            transition: background-color 0.3s, transform 0.3s;
            border: none;
            cursor: pointer;
            text-align: center;
        }
        
        .btn:hover {
            background-color: var(--light-gray);
            transform: translateY(-2px);
        }
        
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: white;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
                text-align: center;
                gap: 15px;
                z-index: 1000;
            }
            
            .nav-links.active {
                display: flex;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .content-grid, .solutions-grid {
                grid-template-columns: 1fr;
            }
        }