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

        html {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }

        body {
            font-size: 16px;
            line-height: 1.6;
            color: #222;
            background: #f5f5f5;
        }

        header {
            background: #fff;
            border-bottom: 5px solid #ff1f00;
            padding: 1.5em 0;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }

        .header-inner {
            max-width: 960px;
            margin: 0 auto;
            padding: 0 1em;
        }

        h1 {
            font-size: 2.5em;
            font-weight: 700;
            color: #222;
            margin-bottom: 0.3em;
        }

        .container {
            max-width: 960px;
            margin: 2em auto;
            background: #fff;
            padding: 2em;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        article {
            margin-bottom: 2em;
        }

        article h2 {
            font-size: 2em;
            font-weight: 700;
            color: #004c62;
            margin: 1.5em 0 0.5em 0;
        }

        article h3 {
            font-size: 1.5em;
            font-weight: 700;
            color: #004c62;
            margin: 1.3em 0 0.5em 0;
        }

        article h4 {
            font-size: 1.25em;
            font-weight: 700;
            color: #ff1f00;
            margin: 1.2em 0 0.5em 0;
        }

        article h5 {
            font-size: 1.1em;
            font-weight: 700;
            color: #ff1f00;
            margin: 1em 0 0.5em 0;
        }

        article h6 {
            font-size: 1em;
            font-weight: 700;
            color: #ff1f00;
            margin: 1em 0 0.5em 0;
        }

        article p {
            margin: 0 0 1em 0;
        }

        article ul,
        article ol {
            margin: 0 0 1em 2em;
        }

        article li {
            margin: 0.25em 0;
        }

        article ul li {
            list-style: disc;
        }

        article ol li {
            list-style: decimal;
        }

        article a {
            color: #ff1f00;
            text-decoration: none;
            transition: color 0.25s;
        }

        article a:hover {
            text-decoration: underline;
        }

        article strong {
            font-weight: 700;
        }

        article em {
            font-style: italic;
        }

        article blockquote {
            padding-left: 2em;
            border-left: 3px solid #d2d4db;
            margin: 1em 0;
            color: #555;
        }

        .transition-section {
            margin: 2em 0;
            padding: 1.5em;
            background: #f8f8f8;
            border-left: 4px solid #ff1f00;
        }

        .transition-section p {
            margin: 0.5em 0;
        }

        .links-section {
            margin: 2em 0;
            padding: 2em;
            background: #fafafa;
            border-top: 3px solid #d2d4db;
        }

        .links-section h3 {
            font-size: 1.3em;
            font-weight: 700;
            color: #222;
            margin: 1.5em 0 0.5em 0;
            padding-bottom: 0.3em;
            border-bottom: 2px solid #ff1f00;
        }

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

        .links-section ul {
            list-style: none;
            margin: 1em 0;
            padding: 0;
            column-count: 2;
            column-gap: 2em;
        }

        .links-section li {
            margin: 0.5em 0;
            break-inside: avoid;
        }

        .links-section a {
            color: #ff1f00;
            text-decoration: none;
            transition: color 0.25s;
            display: inline-block;
        }

        .links-section a:hover {
            color: #004c62;
            text-decoration: underline;
        }

        footer {
            background: #ccc;
            padding: 2em 0;
            margin-top: 3em;
            text-align: center;
            color: #555;
            font-size: 0.9em;
        }

        @media screen and (max-width: 768px) {
            body {
                font-size: 14px;
            }

            h1 {
                font-size: 1.8em;
            }

            .container {
                margin: 1em;
                padding: 1em;
            }

            article h2 {
                font-size: 1.5em;
            }

            article h3 {
                font-size: 1.3em;
            }

            article h4 {
                font-size: 1.1em;
            }

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

            .transition-section {
                padding: 1em;
            }

            .links-section {
                padding: 1em;
            }
        }

        @media screen and (max-width: 480px) {
            h1 {
                font-size: 1.5em;
            }

            .container {
                margin: 0.5em;
                padding: 0.75em;
            }
        }