* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: #333;
            background: #f8f9fa;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        a {
            color: #4a6ee0;
            text-decoration: none;
            transition: color 0.3s;
        }
        a:hover {
            color: #e64a4a;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
        }
        header {
            background: linear-gradient(135deg, #2d3b8f 0%, #4a6ee0 100%);
            color: white;
            padding: 1.5rem 0;
            border-radius: 0 0 12px 12px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            margin-bottom: 2rem;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            padding: 0 1rem;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo span {
            color: #ffcc00;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        nav {
            display: flex;
            gap: 1.5rem;
            align-items: center;
        }
        nav a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 6px;
        }
        nav a:hover {
            background: rgba(255,255,255,0.15);
        }
        .search-form {
            display: flex;
            margin-left: 1rem;
        }
        .search-form input {
            padding: 0.6rem 1rem;
            border: none;
            border-radius: 6px 0 0 6px;
            width: 220px;
        }
        .search-form button {
            background: #ffcc00;
            color: #2d3b8f;
            border: none;
            padding: 0.6rem 1.2rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #ffdd44;
        }
        .breadcrumb {
            padding: 1rem;
            font-size: 0.9rem;
            color: #c0c8ff;
        }
        .breadcrumb a {
            color: #c0c8ff;
        }
        .breadcrumb a:hover {
            color: white;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media (max-width: 768px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        h1 {
            color: #2d3b8f;
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            line-height: 1.3;
            border-bottom: 3px solid #ffcc00;
            padding-bottom: 0.5rem;
        }
        h2 {
            color: #4a6ee0;
            font-size: 1.8rem;
            margin: 2.5rem 0 1rem;
            padding-left: 0.5rem;
            border-left: 4px solid #4a6ee0;
        }
        h3 {
            color: #666;
            font-size: 1.4rem;
            margin: 2rem 0 0.8rem;
        }
        h4 {
            color: #888;
            font-size: 1.2rem;
            margin: 1.5rem 0 0.6rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .highlight {
            background: #fff9e6;
            padding: 1.5rem;
            border-left: 4px solid #ffcc00;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3em;
        }
        strong {
            color: #2d3b8f;
        }
        .internal-link {
            background: #f0f4ff;
            padding: 2px 6px;
            border-radius: 4px;
            border: 1px dashed #4a6ee0;
        }
        .feature-img {
            width: 100%;
            margin: 2rem 0;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
        }
        aside {
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 20px;
        }
        .sidebar-widget {
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 {
            font-size: 1.2rem;
            color: #2d3b8f;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
            margin-bottom: 1rem;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        label {
            display: block;
            margin-bottom: 0.4rem;
            font-weight: 600;
            color: #555;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-family: inherit;
        }
        button[type="submit"] {
            background: #4a6ee0;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
            width: 100%;
        }
        button[type="submit"]:hover {
            background: #2d3b8f;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin: 0.5rem 0;
        }
        .stars i {
            color: #ffcc00;
            cursor: pointer;
            font-size: 1.5rem;
        }
        footer {
            margin-top: 3rem;
            background: #2d3b8f;
            color: white;
            padding: 2.5rem;
            border-radius: 12px 12px 0 0;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            color: #ffcc00;
            font-size: 1.3rem;
            margin-bottom: 1rem;
        }
        friend-link {
            display: block;
            margin: 0.5rem 0;
            color: #c0c8ff;
        }
        friend-link:hover {
            color: white;
        }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid #4a6ee0;
            color: #c0c8ff;
            font-size: 0.9rem;
        }
        .last-updated {
            font-style: italic;
            color: #888;
            margin: 1rem 0 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #eee;
        }
        .mobile-only {
            display: none;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #2d3b8f;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem;
                border-radius: 0 0 12px 12px;
                z-index: 1000;
            }
            nav.active {
                display: flex;
            }
            .header-top {
                position: relative;
            }
            .search-form input {
                width: 100%;
            }
            h1 {
                font-size: 2rem;
            }
            article {
                padding: 1.5rem;
            }
            .mobile-only {
                display: block;
            }
        }