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

        body {
            font-family: Arial, Helvetica, sans-serif;
            color: #000000;
            background-color: #FFFFFF;
            line-height: 1.6;
        }

        header {
            background: linear-gradient(135deg, #22374F 0%, #355579 100%);
            padding: 2rem 1rem;
            text-align: center;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        header h1 {
            color: #FFFFFF;
            font-size: 2.5rem;
            font-weight: 300;
            letter-spacing: 2px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }

        main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem 1rem;
        }

        article {
            background: #FFFFFF;
            padding: 2rem;
            margin-bottom: 2rem;
            border-left: 4px solid #657796;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }

        article p {
            margin-bottom: 1.2rem;
            font-size: 1rem;
            color: #333;
        }

        article h2 {
            color: #22374F;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-size: 1.8rem;
            border-bottom: 2px solid #657796;
            padding-bottom: 0.5rem;
        }

        article h3 {
            color: #355579;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
            font-size: 1.4rem;
        }

        article h4 {
            color: #657796;
            margin-top: 1rem;
            margin-bottom: 0.6rem;
            font-size: 1.2rem;
        }

        .transition-section {
            background: #F5F7FA;
            padding: 2rem;
            margin-bottom: 2rem;
            border-radius: 8px;
            border: 1px solid #E0E4E9;
        }

        .transition-section p {
            font-size: 1rem;
            color: #333;
            margin-bottom: 1rem;
        }

        .links-section {
            background: linear-gradient(to bottom, #F8F9FB 0%, #FFFFFF 100%);
            padding: 2rem;
            border-radius: 8px;
            border: 2px solid #657796;
            margin-bottom: 2rem;
        }

        .links-section h3 {
            color: #22374F;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-size: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #657796;
        }

        .links-section h3:first-child {
            margin-top: 0;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 0.8rem 2rem;
            margin-bottom: 1.5rem;
        }

        .links-section li {
            padding-left: 1.2rem;
            position: relative;
        }

        .links-section li:before {
            content: "◆";
            position: absolute;
            left: 0;
            color: #657796;
            font-size: 0.8rem;
        }

        .links-section a {
            color: #22374F;
            text-decoration: none;
            font-size: 0.95rem;
            transition: color 0.3s ease;
        }

        .links-section a:hover {
            color: #657796;
            text-decoration: underline;
        }

        footer {
            background: #22374F;
            color: #FFFFFF;
            text-align: center;
            padding: 1.5rem 1rem;
            margin-top: 3rem;
            font-size: 0.9rem;
        }

        @media (max-width: 768px) {
            header h1 {
                font-size: 1.8rem;
            }

            article {
                padding: 1.5rem;
            }

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.2rem;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 0.6rem;
            }

            main {
                padding: 1rem 0.5rem;
            }

            .transition-section {
                padding: 1.5rem;
            }

            .links-section {
                padding: 1.5rem;
            }
        }

        @media (max-width: 480px) {
            header h1 {
                font-size: 1.5rem;
                letter-spacing: 1px;
            }

            article {
                padding: 1rem;
            }

            article h2 {
                font-size: 1.3rem;
            }

            .links-section h3 {
                font-size: 1.3rem;
            }
        }