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

        body {
            background: #aaa;
            font-family: "Trebuchet MS", Arial, Verdana, sans-serif;
            font-size: 95%;
            color: #35383d;
            line-height: 1.6;
        }

        a {
            color: #00a0e3;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover {
            color: #039;
            text-decoration: underline;
        }

        a:visited {
            color: #095570;
        }

        .container {
            max-width: 1000px;
            margin: 0 auto;
            background: #fff;
        }

        .header {
            background: linear-gradient(to bottom, #e8f4f8 0%, #b8d4e0 100%);
            padding: 20px 30px;
            border-bottom: 3px solid #004460;
        }

        .header h1 {
            font-size: 2em;
            font-weight: normal;
            letter-spacing: -1px;
            color: #000;
            margin-bottom: 5px;
        }

        .header-desc {
            color: #333;
            font-size: 1.1em;
            font-weight: bold;
        }

        .navbar {
            background: #004460;
            padding: 0;
            border-radius: 5px 5px 0 0;
            overflow-x: auto;
        }

        .navbar ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            margin: 0;
            padding: 0;
        }

        .navbar li {
            margin: 0;
        }

        .navbar a {
            display: block;
            padding: 10px 15px;
            color: #fff;
            text-decoration: none;
            font-size: 0.9em;
            white-space: nowrap;
            transition: background 0.3s ease;
        }

        .navbar a:hover,
        .navbar a.active {
            background: #fff;
            color: #039;
            border-radius: 5px 5px 0 0;
        }

        .main-content {
            padding: 30px;
            max-width: 800px;
        }

        .main-content h1 {
            font-size: 1.8em;
            font-weight: normal;
            letter-spacing: -1px;
            color: #005673;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px dotted #000;
        }

        .main-content h2 {
            font-size: 1.4em;
            font-weight: normal;
            color: #005673;
            margin-top: 25px;
            margin-bottom: 15px;
        }

        .main-content h3 {
            font-size: 1.2em;
            font-weight: bold;
            color: #004460;
            margin-top: 20px;
            margin-bottom: 12px;
        }

        .main-content h4 {
            font-size: 1.1em;
            font-weight: bold;
            color: #004460;
            margin-top: 15px;
            margin-bottom: 10px;
        }

        .main-content p {
            margin-bottom: 15px;
            line-height: 1.7;
        }

        .main-content ul,
        .main-content ol {
            margin: 15px 0;
            padding-left: 0;
        }

        .main-content li {
            padding: 5px 0 5px 25px;
            list-style-type: none;
            background: url('data:image/png;base64,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') no-repeat left 8px;
            line-height: 1.5;
        }

        .main-content blockquote {
            background: #e9f8ff;
            padding: 15px 20px;
            margin: 20px 0;
            border-left: 4px solid #00a0e3;
            color: #369;
        }

        .main-content blockquote p {
            margin-bottom: 10px;
        }

        .main-content code {
            background: #f4f4f4;
            padding: 2px 6px;
            border-radius: 3px;
            font-family: "Courier New", monospace;
            font-size: 0.9em;
        }

        .main-content pre {
            background: #fefefe;
            border: 1px solid #303130;
            padding: 15px;
            overflow-x: auto;
            margin: 20px 0;
            border-radius: 4px;
        }

        .transition-section {
            padding: 30px;
            background: #f9f9f9;
            border-top: 2px solid #b8cc6e;
            border-bottom: 2px solid #b8cc6e;
        }

        .transition-section p {
            line-height: 1.7;
            margin-bottom: 15px;
        }

        .links-section {
            padding: 40px 30px;
            background: #f5f5f5;
        }

        .links-section h2 {
            font-size: 1.6em;
            font-weight: normal;
            color: #005673;
            margin-bottom: 30px;
            text-align: center;
        }

        .links-section h3 {
            font-size: 1.3em;
            font-weight: bold;
            color: #004460;
            margin-top: 25px;
            margin-bottom: 15px;
            padding-bottom: 8px;
            border-bottom: 2px solid #b8cc6e;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 10px 20px;
            margin-bottom: 30px;
            padding: 0;
        }

        .links-section li {
            padding: 8px 0;
            background: none;
        }

        .links-section li a {
            color: #00a0e3;
            text-decoration: none;
            transition: color 0.3s ease;
            display: inline-block;
        }

        .links-section li a:before {
            content: "→ ";
            color: #b8cc6e;
            font-weight: bold;
            margin-right: 5px;
        }

        .links-section li a:hover {
            color: #004460;
            text-decoration: none;
            transform: translateX(3px);
        }

        .footer {
            background: #e8f4f8;
            padding: 20px 30px;
            text-align: center;
            font-size: 0.85em;
            color: #333;
            border-top: 3px solid #004460;
        }

        .footer a {
            color: #004460;
            margin: 0 10px;
        }

        @media only screen and (max-width: 768px) {
            .header {
                padding: 15px 20px;
            }

            .header h1 {
                font-size: 1.5em;
            }

            .navbar ul {
                flex-direction: column;
            }

            .navbar a {
                padding: 12px 20px;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }

            .main-content {
                padding: 20px;
            }

            .main-content h1 {
                font-size: 1.5em;
            }

            .transition-section {
                padding: 20px;
            }

            .links-section {
                padding: 30px 20px;
            }

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

            .footer {
                padding: 15px 20px;
            }
        }

        @media only screen and (max-width: 480px) {
            body {
                font-size: 90%;
            }

            .header h1 {
                font-size: 1.3em;
            }

            .header-desc {
                font-size: 1em;
            }

            .navbar a {
                font-size: 0.85em;
            }

            .main-content {
                padding: 15px;
            }

            .main-content h1 {
                font-size: 1.3em;
            }

            .main-content h2 {
                font-size: 1.2em;
            }

            .main-content h3 {
                font-size: 1.1em;
            }

            .links-section h2 {
                font-size: 1.3em;
            }

            .links-section h3 {
                font-size: 1.1em;
            }
        }