* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background-color: #0a0a0a;
            color: #e0e0e0;
            line-height: 1.6;
            position: relative;
            overflow-x: hidden;
        }

        /* SVG波背景 */
        .wave-container {
            position: absolute;
            top: 45vh;
            left: 0;
            width: 100%;
            height: 30%;
            z-index: 0;
            pointer-events: none;
        }

        .wave-svg {
            position: absolute;
            bottom: 0;
            width: 100%;
            height: 100%;
        }

        .parallax>use {
            animation: move-forever 25s cubic-bezier(.55, .5, .45, .5) infinite;
        }

        .parallax>use:nth-child(1) {
            animation-delay: -2s;
            animation-duration: 20s;
        }

        .parallax>use:nth-child(2) {
            animation-delay: -3s;
            animation-duration: 25s;
        }

        .parallax>use:nth-child(3) {
            animation-delay: -4s;
            animation-duration: 30s;
        }

        @keyframes move-forever {
            0% {
                transform: translate3d(-90px, 0, 0);
            }

            100% {
                transform: translate3d(85px, 0, 0);
            }
        }

        /* ヘッダー */
        header {
            background: rgba(26, 26, 26, 0.8);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(51, 51, 51, 0.5);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        nav {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 2rem;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: bold;
            color: #b388ff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
        }

        .nav-links a {
            color: #b0b0b0;
            text-decoration: none;
            transition: color 0.3s;
            font-size: 0.95rem;
        }

        .nav-links a:hover {
            color: #b388ff;
        }

        .emergency-btn {
            background: #ff3333;
            color: white;
            padding: 0.5rem 1.5rem;
            border-radius: 4px;
            text-decoration: none;
            font-weight: bold;
            transition: background 0.3s;
        }

        .emergency-btn:hover {
            background: #ff5555;
            color: white !important;
        }

        /* ヒーローセクション */
        .hero {
            max-width: 1200px;
            margin: 0 auto;
            padding: 4rem 2rem;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .hero h1 {
            font-size: 5rem;
            font-weight: bold;
            margin-bottom: 1rem;
            background: linear-gradient(45deg, #b388ff, #7c4dff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero .subtitle {
            font-size: 1.2rem;
            color: #888;
            margin-bottom: 3rem;
        }

        /* 検索バー */
        .search-container {
            max-width: 600px;
            margin: 0 auto 3rem;
            position: relative;
        }

        .search-input {
            width: 100%;
            padding: 1rem 3rem 1rem 1.5rem;
            background: #1a1a1a;
            border: 2px solid #333;
            border-radius: 8px;
            color: #e0e0e0;
            font-size: 1rem;
            transition: border-color 0.3s;
        }

        .search-input:focus {
            outline: none;
            border-color: #b388ff;
        }

        .search-btn {
            position: absolute;
            right: 0.5rem;
            top: 50%;
            transform: translateY(-50%);
            background: #7c4dff;
            color: #ffffff;
            border: none;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s;
        }

        .search-btn:hover {
            background: #651fff;
        }

        /* クイックアクセス */
        .quick-access {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            max-width: 800px;
            margin: 0 auto;
        }

        .quick-link {
            background: #1a1a1a;
            border: 1px solid #333;
            padding: 1.5rem;
            border-radius: 8px;
            text-decoration: none;
            color: #e0e0e0;
            transition: all 0.3s;
            text-align: center;
        }

        .quick-link:hover {
            border-color: #b388ff;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(179, 136, 255, 0.3);
        }

        .quick-link h3 {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
            color: #b388ff;
        }

        .quick-link p {
            font-size: 0.9rem;
            color: #888;
        }

        /* メインコンテンツ */
        main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
            position: relative;
            z-index: 1;
        }

        /* カテゴリーセクション */
        .categories {
            background: rgba(17, 17, 17, 0.8);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-radius: 12px;
            padding: 3rem;
            margin-bottom: 3rem;
        }

        .categories h2 {
            font-size: 2rem;
            margin-bottom: 2rem;
            color: #b388ff;
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
        }

        .category-card {
            background: #1a1a1a;
            border: 1px solid #333;
            border-radius: 8px;
            padding: 2rem;
            text-decoration: none;
            color: #e0e0e0;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .category-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, #b388ff, #7c4dff);
            transform: translateX(-100%);
            transition: transform 0.3s;
        }

        .category-card:hover::before {
            transform: translateX(0);
        }

        .category-card:hover {
            border-color: #b388ff;
            transform: translateY(-2px);
        }

        .category-card h3 {
            font-size: 1.3rem;
            margin-bottom: 0.5rem;
        }

        .category-card p {
            color: #888;
            font-size: 0.95rem;
        }

        /* 最近の更新 */
        .recent-updates {
            background: #0f0f0f;
            border-radius: 12px;
            padding: 3rem;
        }

        .recent-updates h2 {
            font-size: 2rem;
            margin-bottom: 2rem;
            color: #9575cd;
        }

        .update-list {
            display: grid;
            gap: 1rem;
        }

        .update-item {
            background: #1a1a1a;
            border: 1px solid #333;
            border-radius: 8px;
            padding: 1.5rem;
            display: grid;
            grid-template-columns: auto 1fr auto;
            gap: 1rem;
            align-items: center;
            text-decoration: none;
            color: #e0e0e0;
            transition: all 0.3s;
        }

        .update-item:hover {
            border-color: #9575cd;
            background: #1f1f1f;
        }

        .update-icon {
            width: 40px;
            height: 40px;
            background: #7c4dff22;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }

        .update-content h4 {
            font-size: 1.1rem;
            margin-bottom: 0.25rem;
        }

        .update-content p {
            font-size: 0.9rem;
            color: #888;
        }

        .update-date {
            font-size: 0.85rem;
            color: #666;
        }

        /* フッター */
        footer {
            background: #0a0a0a;
            border-top: 1px solid #333;
            padding: 3rem 2rem 2rem;
            margin-top: 4rem;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-section h3 {
            color: #b388ff;
            margin-bottom: 1rem;
        }

        .footer-section a {
            display: block;
            color: #888;
            text-decoration: none;
            padding: 0.25rem 0;
            transition: color 0.3s;
        }

        .footer-section a:hover {
            color: #b388ff;
        }

        .footer-bottom {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #333;
            color: #666;
            font-size: 0.9rem;
        }

        /* レスポンシブ */
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }

            .nav-links {
                display: none;
            }

            .categories,
            .recent-updates {
                padding: 2rem 1.5rem;
            }
        }

        /* レスポンシブ対応 */
        @media (max-width: 768px) {
            body {
                font-size: 14px;
                /* ベースのフォントサイズを少し小さくする */
            }

            /* ナビゲーション */
            .nav-links {
                display: none;
                /* スマホでは非表示（ハンバーガーメニューに置き換えるのが理想） */
            }

            nav {
                padding: 1rem 1.5rem;
            }

            /* ヒーローセクション */
            .hero h1 {
                font-size: 2.5rem;
                /* タイトルのフォントサイズを調整 */
            }

            .hero {
                padding: 2rem 1.5rem;
                /* 上下の余白を調整 */
            }

            .hero .subtitle {
                font-size: 1rem;
                margin-bottom: 2rem;
            }

            /* 波の背景の調整 */
            .wave-container {
                top: 50vh;
                /* 表示位置を少し下げる */
                height: 150px;
                /* 高さをビューポート依存から固定値に変更 */
            }

            /* クイックアクセス */
            .quick-access {
                /* 2列レイアウトにする */
                grid-template-columns: repeat(2, 1fr);
                gap: 0.75rem;
            }

            .quick-link {
                padding: 1rem;
            }

            .quick-link h3 {
                font-size: 1rem;
            }

            /* メインコンテンツの余白 */
            main {
                padding: 1rem;
            }

            /* カテゴリーと最近の更新セクション */
            .categories,
            .recent-updates {
                padding: 2rem 1.5rem;
                /* 内側の余白を調整 */
            }

            .categories h2,
            .recent-updates h2 {
                font-size: 1.5rem;
                /* 見出しのサイズを調整 */
            }

            /* 最近の更新アイテム */
            .update-item {
                /* 日付がコンテンツの下に来るようにレイアウトを調整 */
                grid-template-columns: auto 1fr;
                grid-template-rows: auto auto;
                align-items: start;
                row-gap: 0.5rem;
                column-gap: 1rem;
            }

            .update-icon {
                grid-row: 1 / 3;
                /* アイコンは2行分の高さを持つ */
                align-self: center;
            }

            .update-content {
                grid-column: 2;
                grid-row: 1;
            }

            .update-date {
                grid-column: 2;
                grid-row: 2;
                justify-self: start;
                /* 日付を左寄せに */
            }

            /* フッター */
            .footer-content {
                grid-template-columns: 1fr;
                /* 1列にする */
                text-align: center;
                /* 中央揃えにする */
            }

            .footer-bottom {
                font-size: 0.8rem;
            }
            
        }