body {
            font-family: 'Noto Sans JP', sans-serif;
            background-color: #f8fafc;
            color: #1e293b;
        }
        
        .red-gradient-bg {
            background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
        }
        
        .feature-card {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border-top: 5px solid transparent;
        }
        
        .feature-card:nth-child(1) {
            border-top-color: #dc2626;
        }
        
        .feature-card:nth-child(2) {
            border-top-color: #ea580c;
        }
        
        .feature-card:nth-child(3) {
            border-top-color: #ca8a04;
        }
        
        .feature-card:nth-child(4) {
            border-top-color: #16a34a;
        }
        
        .feature-card:nth-child(5) {
            border-top-color: #2563eb;
        }
        
        .feature-card:nth-child(6) {
            border-top-color: #7c3aed;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }
        
        .feature-number {
            font-size: 3rem;
            font-weight: 800;
            color: #e2e8f0;
            position: absolute;
            top: -20px;
            right: 20px;
            z-index: 0;
            opacity: 0.8;
        }

        .container {
            max-width: 1200px;
        }
        
        .pulse-animation {
            animation: pulse 2s infinite;
        }
        
        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.4);
            }
            70% {
                box-shadow: 0 0 0 10px rgba(220, 38, 38, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(220, 38, 38, 0);
            }
        }
        
        .feature-icon-1 {
            background: linear-gradient(135deg, #dc2626 0%, #f87171 100%);
        }
        
        .feature-icon-2 {
            background: linear-gradient(135deg, #ea580c 0%, #fb923c 100%);
        }
        
        .feature-icon-3 {
            background: linear-gradient(135deg, #ca8a04 0%, #facc15 100%);
        }
        
        .feature-icon-4 {
            background: linear-gradient(135deg, #16a34a 0%, #4ade80 100%);
        }
        
        .feature-icon-5 {
            background: linear-gradient(135deg, #2563eb 0%, #60a5fa 100%);
        }
        
        .feature-icon-6 {
            background: linear-gradient(135deg, #7c3aed 0%, #a78bfa 100%);
        }
        
        .section-divider {
            height: 6px;
            width: 80px;
            margin: 0 auto;
            border-radius: 3px;
        }