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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f5f5;
        }

        header {
            background: linear-gradient(135deg, #ff8c00 0%, #ffa500 100%);
            padding: 2rem 1rem;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
        }

        h1 {
            color: #fff;
            font-size: 2.5rem;
            font-weight: 700;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
            margin-bottom: 0.5rem;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }

        article {
            background: #fff;
            margin: 2rem auto;
            padding: 2.5rem;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
        }

        article h2 {
            color: #ff8c00;
            font-size: 1.8rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #ffd674;
        }

        article h3 {
            color: #ff8c00;
            font-size: 1.4rem;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
        }

        article h4 {
            color: #333;
            font-size: 1.2rem;
            margin-top: 1.2rem;
            margin-bottom: 0.6rem;
        }

        article p {
            margin-bottom: 1rem;
            font-size: 1rem;
            color: #555;
        }

        article strong {
            color: #333;
        }

        article table {
            width: 100%;
            margin: 1.5rem 0;
            border-collapse: collapse;
            overflow-x: auto;
            display: block;
        }

        article table tbody {
            display: table;
            width: 100%;
        }

        article td {
            padding: 0.8rem;
            border: 1px solid #ddd;
        }

        article .b_1,
        article .b_2 {
            background-color: #ffd674;
            font-weight: 600;
        }

        .transition-section {
            background: #fff;
            margin: 2rem auto;
            padding: 2rem 2.5rem;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
        }

        .transition-section p {
            margin-bottom: 1rem;
            font-size: 1rem;
            color: #555;
            line-height: 1.8;
        }

        .links-section {
            background: #fff;
            margin: 2rem auto 3rem;
            padding: 2.5rem;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
        }

        .links-section h2 {
            color: #ff8c00;
            font-size: 1.8rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #ffd674;
        }

        .links-section h3 {
            color: #ff8c00;
            font-size: 1.3rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 2rem;
            margin-bottom: 1.5rem;
        }

        .links-section li {
            margin-bottom: 0.8rem;
            break-inside: avoid;
            page-break-inside: avoid;
        }

        .links-section a {
            color: #0066cc;
            text-decoration: none;
            transition: color 0.3s ease;
            display: inline-block;
            position: relative;
            padding-left: 1.2rem;
        }

        .links-section a:before {
            content: "→";
            position: absolute;
            left: 0;
            color: #ff8c00;
            font-weight: bold;
        }

        .links-section a:hover {
            color: #ff8c00;
        }

        footer {
            background: linear-gradient(135deg, #333 0%, #555 100%);
            color: #fff;
            padding: 2rem 1rem;
            margin-top: 3rem;
            text-align: center;
        }

        footer p {
            margin: 0.5rem 0;
            font-size: 0.9rem;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }

            article,
            .transition-section,
            .links-section {
                padding: 1.5rem;
                margin: 1.5rem auto;
            }

            article h2 {
                font-size: 1.5rem;
            }

            article h3 {
                font-size: 1.2rem;
            }

            .links-section ul {
                column-count: 1;
            }

            article table {
                font-size: 0.9rem;
            }

            article td {
                padding: 0.5rem;
            }
        }

        @media (max-width: 480px) {
            h1 {
                font-size: 1.6rem;
            }

            header {
                padding: 1.5rem 1rem;
            }

            article,
            .transition-section,
            .links-section {
                padding: 1rem;
            }

            article h2 {
                font-size: 1.3rem;
            }

            article table {
                font-size: 0.8rem;
            }
        }