:root {
            --primary-blue: #2a5c8a;
            --secondary-green: #4caf50;
            --accent-yellow: #ffc107;
            --dark-gray: #333;
            --light-gray: #f5f5f5;
            --text-color: #222;
            --border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #fff;
            max-width: 100%;
            overflow-x: hidden;
        }
        header {
            background: linear-gradient(135deg, var(--primary-blue) 0%, #1a3a5a 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .my-logo {
            font-family: 'Arial Rounded MT Bold', 'Arial', sans-serif;
            font-size: 1.8rem;
            font-weight: bold;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--accent-yellow);
            transform: scale(1.03);
        }
        .my-logo i {
            font-size: 2rem;
            color: var(--accent-yellow);
        }
        .desktop-nav {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
        }
        .desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .desktop-nav a:hover {
            color: var(--accent-yellow);
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-yellow);
            transition: width 0.3s ease;
        }
        .desktop-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: var(--primary-blue);
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
            z-index: 999;
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            padding: 1rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            background-color: rgba(255,255,255,0.1);
            padding-left: 1.5rem;
        }
        .breadcrumb {
            max-width: 1200px;
            margin: 1rem auto;
            padding: 0 1.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--primary-blue);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--dark-gray);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        @media (max-width: 992px) {
            .container {
                grid-template-columns: 1fr;
            }
        }
        main {
            padding: 2rem 0;
        }
        article {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 2rem;
            box-shadow: var(--box-shadow);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.5rem;
            color: var(--primary-blue);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent-yellow);
            padding-bottom: 0.5rem;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
        }
        h2 {
            font-size: 1.8rem;
            color: var(--primary-blue);
            margin: 2rem 0 1rem;
            padding-top: 1rem;
            border-top: 2px solid var(--light-gray);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--dark-gray);
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            font-size: 1.1rem;
            color: #555;
            margin: 1.2rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            background-color: #f0f8ff;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--primary-blue);
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fffde7;
            padding: 1rem;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--accent-yellow);
            margin: 1.5rem 0;
        }
        .pro-tip {
            background-color: #e8f5e9;
            padding: 1.2rem;
            border-radius: var(--border-radius);
            margin: 1.5rem 0;
            position: relative;
        }
        .pro-tip::before {
            content: "💡 Pro Tip:";
            font-weight: bold;
            color: var(--secondary-green);
            display: block;
            margin-bottom: 0.5rem;
        }
        blockquote {
            font-style: italic;
            border-left: 4px solid var(--primary-blue);
            padding-left: 1.5rem;
            margin: 1.5rem 0;
            color: #555;
        }
        a {
            color: var(--primary-blue);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #1a3a5a;
            text-decoration: underline;
        }
        .content-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--border-radius);
            margin: 1.5rem auto;
            display: block;
            box-shadow: var(--box-shadow);
            transition: transform 0.3s ease;
        }
        .content-img:hover {
            transform: scale(1.01);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        .search-form, .comment-form, .rating-form {
            background-color: var(--light-gray);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(42, 92, 138, 0.1);
        }
        button {
            background-color: var(--primary-blue);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        button:hover {
            background-color: #1a3a5a;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 0.5rem 0;
        }
        .rating-stars i {
            color: #ddd;
            cursor: pointer;
            font-size: 1.5rem;
            transition: var(--transition);
        }
        .rating-stars i:hover {
            color: var(--accent-yellow);
        }
        .rating-stars i.active {
            color: var(--accent-yellow);
        }
        aside {
            padding: 2rem 0;
        }
        .sidebar-widget {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            margin-bottom: 2rem;
            box-shadow: var(--box-shadow);
        }
        .widget-title {
            font-size: 1.2rem;
            color: var(--primary-blue);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--light-gray);
        }
        .related-links {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px solid #eee;
        }
        .related-links a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--dark-gray);
        }
        .related-links a:hover {
            color: var(--primary-blue);
        }
        .related-links i {
            color: var(--primary-blue);
        }
        .update-info {
            background-color: #e8f5e9;
            padding: 1rem;
            border-radius: var(--border-radius);
            font-size: 0.9rem;
            color: #2e7d32;
        }
        footer {
            background-color: var(--dark-gray);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 2rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .footer-container {
                grid-template-columns: 1fr;
            }
        }
        .footer-section h3 {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            border-bottom: 2px solid var(--accent-yellow);
            padding-bottom: 0.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #ccc;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.1);
            padding: 1rem;
            border-radius: var(--border-radius);
            margin: 1rem 0;
            transition: var(--transition);
        }
        friend-link:hover {
            background-color: rgba(255,255,255,0.15);
        }
        friend-link a {
            color: var(--accent-yellow);
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #555;
            color: #aaa;
            font-size: 0.9rem;
        }
        .text-center {
            text-align: center;
        }
        .bold {
            font-weight: bold;
        }
        .emoji {
            margin-right: 0.3rem;
        }
        .clear {
            clear: both;
        }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .py-1 { padding-top: 1rem; padding-bottom: 1rem; }