* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Arial', sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            background: #f0f0f0;
        }
        
        .animation-container {
            width: 1539px;
            height: 620px;
            position: relative;
            overflow: hidden;
            background: radial-gradient(ellipse at center, #0066ff 0%, #000066 100%);
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
        }
        
        #canvas {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 1;
        }
        
        .content {
            position: relative;
            z-index: 10;
            color: white;
            text-align: center;
            padding-top: 100px;
            pointer-events: none;
            width: 100%;
            height: 100%;
        }
        
        h1 {
            font-size: 4rem;
            margin-bottom: 1rem;
            text-shadow: 0 0 20px rgba(255, 255, 255, 0.7);
            background: linear-gradient(90deg, #ffffff, #aaddff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            opacity: 0;
            animation: fadeIn 2s forwards 1s;
        }
        
        .tagline {
            font-size: 1.8rem;
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            margin-top: 2rem;
        }
        
        .tagword {
            opacity: 0;
            transform: translateY(20px);
            background: linear-gradient(90deg, #ffcc00, #ff9900);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
            animation: fadeInUp 0.8s forwards;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
		 /* メインコンテンツ（上・中・下に分割） */
        main {
            flex: 1;
            display: flex;
            flex-direction: column;
            padding: 0;
        }
        
        /* 上部セクション */
        .main-top {
            background-color: #3498db;
            color: white;
            padding: 2rem;
            text-align: center;
        }
        
        /* 中央セクション */
        .main-middle {
            background-color: #ecf0f1;
            padding: 2rem;
            flex: 1; /* 残りのスペースを埋める */
        }
        
        /* 下部セクション */
        .main-bottom {
            background-color: #2980b9;
            color: white;
            padding: 2rem;
            text-align: center;
        }