/* 基本設定 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
            line-height: 1.6;
            color: #333;
        }

        /* ヘッダー */
        header {
            background: linear-gradient(135deg, #3C69EB 0%, #3E96F3 100%);
            color: white;
            padding: 1rem 0;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        nav {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 2rem;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: bold;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }

        .nav-links a {
            color: white;
            text-decoration: none;
            transition: opacity 0.3s;
        }

        .nav-links a:hover {
            opacity: 0.8;
        }

        /* フッター */
        footer {
            background: #333;
            color: white;
            text-align: center;
            padding: 2rem;
        }

        .footer-links {
            margin-bottom: 1rem;
        }

        .footer-link {
            color: #ccc;
            text-decoration: none;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: all 0.3s;
            display: inline-block;
        }

        .footer-link:hover {
            color: white;
            background: rgba(255,255,255,0.1);
        }

        .separator {
            color: #666;
            margin: 0 0.5rem;
        }