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

        body {
            font-family: "Helvetica Neue", Helvetica, Arial, "Hiragino Kaku Gothic Pro", Meiryo, sans-serif;
            background: linear-gradient(to bottom, #000000 0%, #330000 100%);
            background-attachment: fixed;
            color: #ffffff;
            line-height: 1.8;
            font-size: 16px;
        }

        .container {
            max-width: 1030px;
            margin: 0 auto;
            padding: 0 20px;
        }

        header {
            background: linear-gradient(to bottom, #000000 0%, #990000 100%);
            border-bottom: 2px solid #e09500;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            padding: 20px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

        .logo {
            font-size: 28px;
            font-weight: bold;
            color: #ffffff;
            text-decoration: none;
            letter-spacing: 2px;
        }

        nav ul {
            list-style: none;
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
        }

        nav a {
            color: #ffffff;
            text-decoration: none;
            padding: 8px 16px;
            transition: all 0.3s ease;
            display: block;
            border-radius: 4px;
        }

        nav a:hover {
            background-color: #d82b17;
            color: #ffffff;
        }

        main {
            background: rgba(0, 0, 0, 0.4);
            margin: 40px auto;
            padding: 60px 20px;
            border-radius: 8px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }

        h1 {
            font-size: 42px;
            color: #ffffff;
            margin-bottom: 40px;
            padding-bottom: 20px;
            border-bottom: 3px solid #d82b17;
            line-height: 1.4;
        }

        article {
            margin-bottom: 50px;
        }

        article h2 {
            font-size: 32px;
            color: #ffffff;
            margin: 40px 0 20px 0;
            padding-left: 20px;
            border-left: 5px solid #d82b17;
        }

        article h3 {
            font-size: 26px;
            color: #ffffff;
            margin: 30px 0 15px 0;
            padding-left: 16px;
            border-left: 4px solid #e09500;
        }

        article h4 {
            font-size: 22px;
            color: #ffffff;
            margin: 25px 0 12px 0;
        }

        article p {
            margin-bottom: 20px;
            color: #f0f0f0;
            line-height: 1.9;
        }

        .transition-section {
            background: rgba(216, 43, 23, 0.1);
            padding: 30px;
            margin: 40px 0;
            border-radius: 6px;
            border-left: 4px solid #d82b17;
        }

        .transition-section p {
            color: #f5f5f5;
            margin-bottom: 15px;
        }

        {% if links %}
        .links-section {
            background: rgba(0, 0, 0, 0.3);
            padding: 50px 30px;
            margin-top: 50px;
            border-radius: 8px;
            border: 1px solid rgba(224, 149, 0, 0.3);
        }

        .links-section h3 {
            font-size: 28px;
            color: #ffffff;
            margin: 30px 0 20px 0;
            padding-left: 20px;
            border-left: 5px solid #e09500;
        }

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

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px 30px;
            margin-bottom: 40px;
        }

        .links-section li {
            padding: 0;
        }

        .links-section a {
            color: #ffffff;
            text-decoration: none;
            padding: 10px 0;
            display: block;
            transition: all 0.3s ease;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .links-section a:hover {
            color: #d82b17;
            padding-left: 10px;
            border-bottom-color: #d82b17;
        }

        .links-section a::before {
            content: "▸ ";
            color: #d82b17;
            margin-right: 8px;
        }
        {% endif %}

        footer {
            background: linear-gradient(to bottom, #000000 0%, #990000 100%);
            border-top: 2px solid #e09500;
            padding: 30px 20px;
            text-align: center;
            color: #ffffff;
            margin-top: 60px;
        }

        footer p {
            margin: 10px 0;
            font-size: 14px;
        }

        @media (max-width: 768px) {
            body {
                font-size: 15px;
            }

            .header-content {
                flex-direction: column;
                gap: 20px;
            }

            nav ul {
                flex-direction: column;
                gap: 10px;
                width: 100%;
            }

            nav a {
                text-align: center;
            }

            main {
                padding: 40px 15px;
                margin: 20px auto;
            }

            h1 {
                font-size: 32px;
                margin-bottom: 30px;
            }

            article h2 {
                font-size: 26px;
                padding-left: 15px;
            }

            article h3 {
                font-size: 22px;
                padding-left: 12px;
            }

            article h4 {
                font-size: 20px;
            }

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

            .links-section h3 {
                font-size: 24px;
                padding-left: 15px;
            }

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

        @media (max-width: 480px) {
            h1 {
                font-size: 26px;
            }

            article h2 {
                font-size: 22px;
            }

            article h3 {
                font-size: 20px;
            }

            .transition-section {
                padding: 20px;
            }

            {% if links %}
            .links-section {
                padding: 25px 15px;
            }
            {% endif %}
        }