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

        body {
            font-family: Arial, Helvetica, sans-serif;
            color: #333;
            font-size: 16px;
            line-height: 1.6;
            background: #fff;
        }

        header {
            background: linear-gradient(to bottom, #2c3640 0%, #414141 100%);
            padding: 20px 0;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        nav {
            background: #303a43;
            border-top: 3px solid #fb5757;
        }

        .nav-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 5px;
        }

        .nav-content a {
            color: #fff;
            text-decoration: none;
            padding: 12px 16px;
            display: inline-block;
            font-size: 14px;
            transition: background 0.3s, color 0.3s;
        }

        .nav-content a:hover {
            background: #fb5757;
            color: #000;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 30px 20px;
        }

        h1 {
            font-size: 28px;
            color: #303a43;
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 3px solid #e3ecf0;
            border-left: 5px solid #fb5757;
            padding-left: 15px;
            line-height: 1.3;
        }

        article {
            background: #fff;
            padding: 25px;
            margin-bottom: 30px;
            border-radius: 5px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }

        article h2 {
            font-size: 22px;
            color: #303a43;
            margin-top: 25px;
            margin-bottom: 15px;
            padding-bottom: 8px;
            border-bottom: 2px solid #e3ecf0;
        }

        article h3 {
            font-size: 18px;
            color: #690;
            margin-top: 20px;
            margin-bottom: 12px;
        }

        article h4 {
            font-size: 16px;
            color: #303a43;
            margin-top: 18px;
            margin-bottom: 10px;
        }

        article p {
            margin-bottom: 15px;
            text-align: justify;
        }

        article a {
            color: #690;
            text-decoration: underline;
        }

        article a:hover {
            color: #999;
        }

        .transition-section {
            background: #f4f7f9;
            padding: 25px;
            margin-bottom: 30px;
            border-radius: 5px;
            border-left: 4px solid #303a43;
        }

        .transition-section p {
            margin-bottom: 15px;
        }

        .links-section {
            background: #fff;
            padding: 30px 25px;
            border-radius: 5px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }

        .links-section h2 {
            font-size: 24px;
            color: #303a43;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid #fb5757;
        }

        .links-section h3 {
            font-size: 18px;
            color: #303a43;
            margin-top: 25px;
            margin-bottom: 12px;
            padding: 8px 12px;
            background: #e3ecf0;
            border-left: 4px solid #690;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 10px 20px;
            margin-bottom: 20px;
        }

        .links-section li {
            padding: 8px 0 8px 18px;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="8" height="8"><circle cx="4" cy="4" r="3" fill="%23669900"/></svg>') no-repeat left 12px;
            border-bottom: 1px solid #e3ecf0;
        }

        .links-section li:last-child {
            border-bottom: none;
        }

        .links-section a {
            color: #690;
            text-decoration: none;
            transition: color 0.3s;
        }

        .links-section a:hover {
            color: #999;
            text-decoration: underline;
        }

        footer {
            background: linear-gradient(to bottom, #e3ecf0 0%, #d0dde3 100%);
            padding: 30px 20px;
            margin-top: 50px;
            border-top: 3px solid #fb5757;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
            color: #3f4446;
            font-size: 14px;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 24px;
            }

            article {
                padding: 20px;
            }

            article h2 {
                font-size: 20px;
            }

            article h3 {
                font-size: 17px;
            }

            .nav-content {
                flex-direction: column;
                gap: 0;
            }

            .nav-content a {
                border-bottom: 1px solid #414141;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 8px;
            }

            .transition-section {
                padding: 20px;
            }

            .links-section {
                padding: 20px;
            }
        }

        @media (max-width: 480px) {
            h1 {
                font-size: 20px;
                padding-left: 12px;
            }

            article {
                padding: 15px;
            }

            .container {
                padding: 20px 15px;
            }

            .nav-content a {
                padding: 10px 15px;
                font-size: 13px;
            }
        }