:root {
            --primary-color: #007bff;
            --background-color: #f8f9fa;
            --text-color: #343a40;
        }
        body {
            margin: 0;
            font-family: 'Noto Sans TC', sans-serif;
            background-color: var(--background-color);
            color: var(--text-color);
            line-height: 1.8;
        }
        .navbar {
            background-color: #fff;
            padding: 0.75rem 2rem;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            font-weight: 700;
        }
        .navbar a {
            color: var(--primary-color);
            text-decoration: none;
            font-size: 1rem;
        }
        .container {
            padding: 2rem;
            max-width: 800px;
            margin: 2rem auto;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }
        h1, h2 {
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        h1 { text-align: center; font-size: 2rem; margin-bottom: 2rem; }
        h2 { font-size: 1.5rem; margin-top: 2.5rem; border-bottom: 2px solid #dee2e6; padding-bottom: 0.5rem; }
        p, li {
            font-size: 1.1rem;
            color: #333;
        }
        ul {
            padding-left: 2rem;
        }
        .nav-link-spacing {
            margin-left: 1.5rem;
        }

        @media (min-width: 768px) {
            .navbar a {
                font-size: 1.2rem;
            }
        }