* { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
            --primary: #fe2c55;
            --secondary: #00f2ea;
            --bg: #0a0a0a;
            --card-bg: #141414;
            --card-border: #222;
            --text: #ffffff;
            --text-dim: #888;
        }
        body { background: var(--bg); color: var(--text); font-family: 'Inter', sans-serif; overflow-x: hidden; line-height: 1.6; }
        .nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 16px 30px; display: flex; justify-content: space-between; align-items: center; background: rgba(10, 10, 10, 0.85); backdrop-filter: blur(12px); border-bottom: 1px solid rgba(255, 255, 255, 0.05); }
        .nav-logo { font-size: 1.3rem; font-weight: 800; background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .nav-links { display: flex; gap: 12px; align-items: center; }
        .nav-links a { color: var(--text-dim); text-decoration: none; font-size: 0.9rem; padding: 8px 16px; border-radius: 8px; transition: all 0.2s; white-space: nowrap; }
        .nav-links a:hover { color: var(--text); background: rgba(255, 255, 255, 0.05); }
        
        .btn-login {
            background: rgba(255, 255, 255, 0.08) !important;
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text) !important;
            font-weight: 600;
        }

        .btn-cta {
            background: var(--primary) !important;
            color: #fff !important;
            font-weight: 600;
            border: none;
        }

        .btn-cta:hover {
            filter: brightness(1.15);
            transform: translateY(-1px);
        }

        /* 言語切替ボタン */
        .lang-switcher {
            display: flex;
            gap: 5px;
            margin-left: 10px;
            background: #222;
            padding: 3px;
            border-radius: 6px;
        }

        .lang-btn {
            background: none;
            border: none;
            color: #666;
            font-size: 11px;
            padding: 4px 8px;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 700;
            transition: all 0.2s;
        }

        .lang-btn:hover {
            color: #aaa;
        }

        .lang-btn.active {
            background: #333;
            color: var(--secondary);
        }

        .page-header { padding: 120px 20px 60px; text-align: center; border-bottom: 1px solid var(--card-border); background: radial-gradient(circle at top, rgba(0, 242, 234, 0.05) 0%, transparent 70%); }
        .page-header h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 16px; }
        .page-header p { color: var(--text-dim); font-size: 1rem; }
        .content-container { max-width: 800px; margin: 0 auto; padding: 60px 20px; }
        .document-section { margin-bottom: 40px; }
        .document-section h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 16px; color: #fff; border-left: 4px solid var(--secondary); padding-left: 12px; }
        .document-section p { color: #ccc; margin-bottom: 16px; font-size: 1rem; }
        .document-section ul { list-style-type: disc; margin-left: 20px; color: #ccc; margin-bottom: 16px; }
        .document-section li { margin-bottom: 8px; }
        .footer { text-align: center; padding: 40px 20px; border-top: 1px solid var(--card-border); color: var(--text-dim); font-size: 0.8rem; }
        @media (max-width: 800px) {
            .nav { padding: 12px 10px; flex-direction: column; align-items: center; gap: 8px; height: auto; position: relative; width: 100%; }
            .nav-links { width: 100%; justify-content: center; gap: 6px; flex-wrap: wrap; }
            .page-header h1 { font-size: 2rem; }
        }