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

        body {
            font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #fff;
        }

        .header {
            background-color: #ebe8e8;
            padding: 20px 0;
            border-bottom: 1px solid #d4d1d1;
        }

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

        .logo {
            text-align: center;
            padding: 10px 0;
        }

        .logo a {
            font-size: 32px;
            font-weight: 700;
            color: #333;
            text-decoration: none;
            letter-spacing: 2px;
            text-transform: uppercase;
        }

        nav {
            background-color: #fff;
            border-bottom: 1px solid #ebe8e8;
            padding: 0;
        }

        nav ul {
            list-style: none;
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            padding: 0;
            margin: 0;
        }

        nav ul li {
            position: relative;
        }

        nav ul li a {
            display: block;
            padding: 18px 20px;
            color: #666;
            text-decoration: none;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: color 0.3s ease;
        }

        nav ul li a:hover,
        nav ul li a.active {
            color: #333;
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            padding: 10px;
            color: #333;
        }

        main {
            padding: 60px 0;
        }

        h1 {
            font-size: 42px;
            font-weight: 300;
            color: #333;
            margin-bottom: 40px;
            text-align: center;
            letter-spacing: 1px;
        }

        article {
            max-width: 800px;
            margin: 0 auto 60px;
            background-color: #fff;
        }

        article h2 {
            font-size: 32px;
            font-weight: 400;
            color: #333;
            margin: 40px 0 20px;
            letter-spacing: 0.5px;
        }

        article h3 {
            font-size: 26px;
            font-weight: 400;
            color: #444;
            margin: 35px 0 18px;
            letter-spacing: 0.5px;
        }

        article h4 {
            font-size: 22px;
            font-weight: 400;
            color: #555;
            margin: 30px 0 15px;
        }

        article h5 {
            font-size: 18px;
            font-weight: 500;
            color: #666;
            margin: 25px 0 12px;
        }

        article h6 {
            font-size: 16px;
            font-weight: 600;
            color: #777;
            margin: 20px 0 10px;
        }

        article p {
            margin-bottom: 20px;
            color: #555;
            font-size: 16px;
        }

        .transition-section {
            max-width: 800px;
            margin: 0 auto 50px;
            padding: 30px 0;
        }

        .transition-section p {
            margin-bottom: 20px;
            color: #555;
            font-size: 16px;
            line-height: 1.7;
        }

        .links-section {
            background-color: #f9f8f8;
            padding: 60px 0;
            border-top: 1px solid #ebe8e8;
            border-bottom: 1px solid #ebe8e8;
        }

        .links-section .container {
            max-width: 1000px;
        }

        .links-section h3 {
            font-size: 24px;
            font-weight: 400;
            color: #333;
            margin-bottom: 25px;
            margin-top: 40px;
            letter-spacing: 0.5px;
        }

        .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 ul li {
            padding: 0;
        }

        .links-section ul li a {
            color: #666;
            text-decoration: none;
            font-size: 15px;
            line-height: 1.6;
            transition: color 0.3s ease;
            display: inline-block;
        }

        .links-section ul li a:hover {
            color: #333;
        }

        .links-section ul li a::before {
            content: "→ ";
            margin-right: 5px;
            color: #999;
        }

        footer {
            background-color: #333;
            color: #bbb;
            padding: 40px 0 20px;
            text-align: center;
        }

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

        footer a {
            color: #bbb;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        footer a:hover {
            color: #fff;
        }

        @media (max-width: 768px) {
            .mobile-menu-toggle {
                display: block;
                margin: 0 auto;
            }

            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
            }

            nav ul.active {
                display: flex;
            }

            nav ul li {
                width: 100%;
                text-align: center;
                border-bottom: 1px solid #ebe8e8;
            }

            nav ul li a {
                padding: 15px;
            }

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

            article h2 {
                font-size: 26px;
            }

            article h3 {
                font-size: 22px;
            }

            article h4 {
                font-size: 20px;
            }

            main {
                padding: 40px 0;
            }

            .links-section {
                padding: 40px 0;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .links-section h3 {
                margin-top: 30px;
                font-size: 22px;
            }
        }

        @media (max-width: 480px) {
            .logo a {
                font-size: 24px;
            }

            h1 {
                font-size: 28px;
            }

            article p,
            .transition-section p {
                font-size: 15px;
            }
        }