* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-blue: #1a237e;
            --accent-blue: #2979ff;
            --light-blue: #e3f2fd;
            --warm-yellow: #ffd54f;
            --warm-orange: #ff9800;
            --dark-gray: #212121;
            --medium-gray: #757575;
            --light-gray: #f5f5f5;
            --white: #ffffff;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
            --border-radius: 8px;
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--dark-gray);
            background-color: var(--white);
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1rem;
            color: var(--primary-blue);
        }
        h1 {
            font-size: clamp(2.5rem, 5vw, 3.5rem);
            text-align: center;
            margin-top: 1.5rem;
            position: relative;
            padding-bottom: 1rem;
        }
        h1:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 120px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-blue), var(--warm-yellow));
            border-radius: 2px;
        }
        h2 {
            font-size: 2rem;
            margin-top: 3rem;
            border-left: 5px solid var(--accent-blue);
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.5rem;
            margin-top: 2rem;
            color: var(--medium-gray);
        }
        h4 {
            font-size: 1.2rem;
            margin-top: 1.5rem;
            color: var(--medium-gray);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        a {
            color: var(--accent-blue);
            text-decoration: none;
            transition: var(--transition);
            font-weight: 500;
        }
        a:hover {
            color: var(--primary-blue);
            text-decoration: underline;
        }
        strong {
            color: var(--primary-blue);
            font-weight: 700;
        }
        em {
            color: var(--medium-gray);
            font-style: italic;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary-blue), #0d47a1);
            color: var(--white);
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 20px;
        }
        .my-logo {
            font-family: Georgia, serif;
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--warm-yellow);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            text-decoration: none;
            color: var(--white);
        }
        .my-logo i {
            color: var(--accent-blue);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-links a {
            color: var(--white);
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-links a:hover {
            color: var(--warm-yellow);
            text-decoration: none;
        }
        .nav-links a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--warm-yellow);
            transition: width 0.3s ease;
        }
        .nav-links a:hover:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            background: transparent;
            border: none;
            padding: 5px;
            gap: 4px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: var(--white);
            border-radius: 2px;
            transition: var(--transition);
        }
        .search-container {
            margin-left: 2rem;
        }
        .search-form {
            display: flex;
        }
        .search-input {
            padding: 0.6rem 1rem;
            border: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            width: 220px;
            font-size: 1rem;
        }
        .search-button {
            background-color: var(--accent-blue);
            color: white;
            border: none;
            padding: 0.6rem 1.2rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: var(--warm-yellow);
            color: var(--dark-gray);
        }
        .breadcrumb {
            background-color: var(--light-blue);
            padding: 1rem 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid #bbdefb;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child):after {
            content: '/';
            margin-left: 0.5rem;
            color: var(--medium-gray);
        }
        main {
            padding: 2rem 0;
            background-color: var(--white);
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: var(--white);
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed var(--light-gray);
            font-size: 0.9rem;
            color: var(--medium-gray);
        }
        .update-time {
            background-color: var(--light-blue);
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-weight: 600;
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            transition: transform 0.5s ease;
        }
        .featured-image:hover {
            transform: scale(1.01);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--medium-gray);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .sidebar {
            background: var(--light-gray);
            padding: 2rem;
            border-radius: var(--border-radius);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-section {
            margin-bottom: 2rem;
        }
        .sidebar h3 {
            font-size: 1.3rem;
            margin-top: 0;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-blue);
        }
        .related-links {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 1rem;
            padding-left: 1.5rem;
            position: relative;
        }
        .related-links li:before {
            content: '▸';
            position: absolute;
            left: 0;
            color: var(--accent-blue);
        }
        .strategy-tip {
            background: linear-gradient(to right, var(--light-blue), #e8f4fd);
            border-left: 4px solid var(--accent-blue);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .strategy-tip h4 {
            margin-top: 0;
            color: var(--primary-blue);
        }
        .highlight-box {
            background-color: #fff8e1;
            border: 1px solid var(--warm-yellow);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: var(--border-radius);
        }
        .highlight-box h4 {
            color: var(--dark-gray);
        }
        .user-interaction {
            background-color: var(--light-gray);
            padding: 2.5rem;
            border-radius: var(--border-radius);
            margin: 3rem 0;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 1.5rem;
        }
        .comment-form, .rating-form {
            background: var(--white);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark-gray);
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--accent-blue);
            box-shadow: 0 0 0 3px rgba(41, 121, 255, 0.1);
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ddd;
            margin: 0.5rem 0;
        }
        .star-rating .star {
            cursor: pointer;
            transition: color 0.2s ease;
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: var(--warm-orange);
        }
        .submit-button {
            background: linear-gradient(to right, var(--accent-blue), #1a73e8);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: var(--border-radius);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            width: 100%;
        }
        .submit-button:hover {
            background: linear-gradient(to right, #1a73e8, var(--primary-blue));
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        footer {
            background: var(--dark-gray);
            color: var(--white);
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: var(--warm-yellow);
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #b0bec5;
        }
        .footer-links a:hover {
            color: var(--warm-yellow);
        }
        friend-link {
            display: block;
            padding: 0.8rem;
            background-color: rgba(255,255,255,0.05);
            border-radius: 4px;
            margin-bottom: 0.8rem;
            transition: background-color 0.3s ease;
        }
        friend-link:hover {
            background-color: rgba(255,255,255,0.1);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #424242;
            color: #b0bec5;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 80px;
                right: -100%;
                flex-direction: column;
                background-color: var(--primary-blue);
                width: 100%;
                max-width: 300px;
                height: calc(100vh - 80px);
                padding: 2rem;
                transition: right 0.4s ease;
                box-shadow: -5px 0 15px rgba(0,0,0,0.1);
                z-index: 999;
            }
            .nav-links.active {
                right: 0;
            }
            .search-container {
                margin-left: 0;
                margin-top: 1rem;
                width: 100%;
            }
            .search-input {
                width: 100%;
            }
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger.active span:nth-child(1) {
                transform: rotate(45deg) translate(6px, 6px);
            }
            .hamburger.active span:nth-child(2) {
                opacity: 0;
            }
            .hamburger.active span:nth-child(3) {
                transform: rotate(-45deg) translate(6px, -6px);
            }
        }
        @media (max-width: 768px) {
            .article-content, .sidebar {
                padding: 1.5rem;
            }
            .user-interaction {
                padding: 1.5rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
            h2 {
                font-size: 1.7rem;
            }
            h3 {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 480px) {
            .my-logo {
                font-size: 1.8rem;
            }
            .breadcrumb ol {
                font-size: 0.8rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 1rem;
                align-items: flex-start;
            }
        }
        @media print {
            header, nav, .sidebar, .user-interaction, footer {
                display: none;
            }
            body {
                font-size: 12pt;
                line-height: 1.5;
                color: black;
                background: white;
            }
            .container {
                max-width: 100%;
                padding: 0;
            }
            h1, h2, h3, h4 {
                color: black;
            }
            a {
                color: black;
                text-decoration: underline;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
        }