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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f5f5;
        }

        .wrap {
            background-color: #fff;
        }

        #ja-header {
            background: linear-gradient(135deg, #1a4d7a 0%, #2563a0 100%);
            padding: 1.5rem 0;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        }

        .main {
            max-width: 980px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .logo h1 {
            color: #fff;
            font-size: 2rem;
            font-weight: 700;
            margin: 0;
        }

        .logo a {
            color: #fff;
            text-decoration: none;
        }

        #ja-mainnav {
            background-color: #2563a0;
            border-bottom: 3px solid #1a4d7a;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }

        #ja-mainnav .main {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

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

        .mainlevel li {
            margin: 0;
        }

        .mainlevel a {
            display: block;
            padding: 1rem 1.2rem;
            color: #fff;
            text-decoration: none;
            font-weight: 500;
            transition: background-color 0.3s ease;
        }

        .mainlevel a:hover,
        .mainlevel a.active {
            background-color: #1a4d7a;
        }

        #ja-search {
            padding: 0.5rem 0;
        }

        #ja-subnav {
            background-color: #e8f1f8;
            border-bottom: 1px solid #d0e4f2;
        }

        #ja-subnav .sublevel ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            padding: 0.5rem 0;
        }

        #ja-subnav .sublevel a {
            display: block;
            padding: 0.5rem 1.2rem;
            color: #2563a0;
            text-decoration: none;
            font-weight: 500;
        }

        #ja-subnav .sublevel a:hover {
            color: #1a4d7a;
            text-decoration: underline;
        }

        .content-wrapper {
            background-color: #fff;
            padding: 3rem 0;
        }

        h1 {
            color: #1a4d7a;
            font-size: 2.5rem;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 3px solid #2563a0;
        }

        article {
            margin-bottom: 3rem;
        }

        article h2 {
            color: #2563a0;
            font-size: 1.8rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }

        article h3 {
            color: #1a4d7a;
            font-size: 1.4rem;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
        }

        article p {
            margin-bottom: 1.2rem;
            color: #555;
            text-align: justify;
        }

        .transition-section {
            background-color: #f8fbfd;
            padding: 2rem;
            border-left: 4px solid #2563a0;
            margin: 2rem 0;
            border-radius: 4px;
        }

        .transition-section p {
            color: #555;
            margin-bottom: 1rem;
        }

        .links-section {
            background: linear-gradient(to bottom, #f8fbfd 0%, #fff 100%);
            padding: 3rem 2rem;
            border-top: 2px solid #e0e0e0;
            margin-top: 3rem;
        }

        .links-section h3 {
            color: #1a4d7a;
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #2563a0;
        }

        .links-section ul {
            list-style: none;
            column-count: 2;
            column-gap: 3rem;
            margin-bottom: 2.5rem;
        }

        .links-section li {
            margin-bottom: 0.8rem;
            break-inside: avoid;
        }

        .links-section a {
            color: #2563a0;
            text-decoration: none;
            transition: color 0.3s ease;
            display: inline-block;
            padding: 0.3rem 0;
        }

        .links-section a:hover {
            color: #1a4d7a;
            text-decoration: underline;
        }

        .links-section a::before {
            content: "→ ";
            color: #2563a0;
            font-weight: bold;
        }

        #ja-footer {
            background: linear-gradient(135deg, #1a4d7a 0%, #2563a0 100%);
            color: #fff;
            padding: 2rem 0;
            margin-top: 3rem;
        }

        .ja-copyright {
            text-align: center;
            font-size: 0.9rem;
            color: #e0e0e0;
        }

        @media (max-width: 768px) {
            .logo h1 {
                font-size: 1.5rem;
            }

            h1 {
                font-size: 2rem;
            }

            .mainlevel ul {
                flex-direction: column;
                width: 100%;
            }

            .mainlevel a {
                padding: 0.8rem 1rem;
            }

            #ja-mainnav .main {
                flex-direction: column;
            }

            #ja-search {
                width: 100%;
                padding: 1rem;
            }

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

            article p {
                text-align: left;
            }

            .content-wrapper {
                padding: 2rem 0;
            }
        }

        @media (max-width: 480px) {
            .logo h1 {
                font-size: 1.2rem;
            }

            h1 {
                font-size: 1.6rem;
            }

            article h2 {
                font-size: 1.4rem;
            }

            article h3 {
                font-size: 1.2rem;
            }

            .mainlevel a {
                padding: 0.7rem 1rem;
                font-size: 0.95rem;
            }
        }