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

        body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            color: #666;
            background-color: #ffffff;
        }

        .top-nav {
            background-color: #4a4a4a;
            padding: 8px 0;
        }

        .top-nav-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            text-align: right;
        }

        .top-nav a {
            color: #fff;
            text-decoration: none;
            font-size: 12px;
            margin-left: 20px;
            transition: color 0.3s;
        }

        .top-nav a:hover {
            color: #3399ff;
        }

        .top-nav a::before {
            content: "■";
            color: #359935;
            font-size: 8px;
            margin-right: 6px;
            vertical-align: middle;
        }

        .main-nav {
            background-color: #2d5f3f;
            padding: 0;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .main-nav-content {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
        }

        .main-nav a {
            color: #fff;
            text-decoration: none;
            padding: 12px 20px;
            display: block;
            font-size: 13px;
            transition: background-color 0.3s;
            border-right: 1px solid rgba(255,255,255,0.1);
        }

        .main-nav a:hover {
            background-color: #234a31;
        }

        .header {
            max-width: 1200px;
            margin: 30px auto;
            padding: 0 20px;
            text-align: center;
            border-bottom: 2px dotted #ccc;
            padding-bottom: 20px;
        }

        h1 {
            color: #000080;
            font-size: 2.5em;
            margin-bottom: 20px;
            font-weight: bold;
        }

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

        article {
            background-color: #fff;
            margin-bottom: 40px;
        }

        article h2 {
            color: #CC0000;
            font-size: 1.5em;
            margin-bottom: 15px;
            margin-top: 25px;
        }

        article h3 {
            color: #000080;
            font-size: 1.2em;
            margin-bottom: 12px;
            margin-top: 20px;
        }

        article p {
            margin-bottom: 15px;
            color: #666;
            font-size: 14px;
        }

        article ul {
            margin-left: 20px;
            margin-bottom: 15px;
        }

        article li {
            margin-bottom: 8px;
            color: #666;
            font-size: 14px;
        }

        .transition-section {
            margin: 40px 0;
            padding: 20px 0;
        }

        .transition-section p {
            color: #666;
            font-size: 14px;
            margin-bottom: 15px;
        }

        .links-section {
            background-color: #f9f9f9;
            padding: 40px 30px;
            border-radius: 8px;
            border: 1px solid #e0e0e0;
            margin-top: 30px;
        }

        .links-section h2 {
            color: #CC0000;
            font-size: 1.8em;
            margin-bottom: 30px;
            text-align: center;
        }

        .links-section h3 {
            color: #000080;
            font-size: 1.3em;
            margin-bottom: 15px;
            margin-top: 30px;
            padding-bottom: 8px;
            border-bottom: 2px solid #2d5f3f;
        }

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

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px 30px;
            margin-bottom: 25px;
        }

        .links-section li {
            position: relative;
            padding-left: 18px;
        }

        .links-section li::before {
            content: "■";
            color: #359935;
            font-size: 8px;
            position: absolute;
            left: 0;
            top: 6px;
        }

        .links-section a {
            color: #3399ff;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .links-section a:hover {
            color: #CC0000;
            text-decoration: underline;
        }

        .footer {
            background-color: #4a4a4a;
            padding: 15px 0;
            margin-top: 50px;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            text-align: right;
        }

        .footer a {
            color: #fff;
            text-decoration: none;
            font-size: 12px;
            margin-left: 20px;
            transition: color 0.3s;
        }

        .footer a:hover {
            color: #3399ff;
        }

        .footer a::before {
            content: "■";
            color: #359935;
            font-size: 8px;
            margin-right: 6px;
            vertical-align: middle;
        }

        .copyright {
            text-align: center;
            padding: 20px;
            color: #999;
            font-size: 12px;
        }

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

            .main-nav-content {
                flex-direction: column;
            }

            .main-nav a {
                border-right: none;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            .links-section {
                padding: 25px 20px;
            }

            .top-nav-content,
            .footer-content {
                text-align: center;
            }

            .top-nav a,
            .footer a {
                margin: 0 10px;
            }
        }

        @media (max-width: 480px) {
            h1 {
                font-size: 1.4em;
            }

            .container {
                padding: 20px 15px;
            }

            article h2 {
                font-size: 1.3em;
            }

            .links-section h2 {
                font-size: 1.5em;
            }

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