* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #2a2d43;
            --secondary-color: #3a6ea5;
            --accent-color: #ff9a3c;
            --text-color: #333;
            --light-bg: #f8f9fa;
            --border-color: #e0e0e0;
            --success-color: #28a745;
            --error-color: #dc3545;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        .header {
            background: linear-gradient(135deg, var(--primary-color) 0%, #1a1c2e 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--accent-color);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-link:hover {
            background-color: rgba(255,255,255,0.1);
            color: var(--accent-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-nav {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background: var(--primary-color);
            padding: 1rem;
            transform: translateY(-100%);
            opacity: 0;
            transition: var(--transition);
            z-index: 999;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .mobile-nav.active {
            transform: translateY(0);
            opacity: 1;
        }
        .mobile-nav-link {
            display: block;
            color: white;
            text-decoration: none;
            padding: 1rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            transition: var(--transition);
        }
        .mobile-nav-link:hover {
            background-color: rgba(255,255,255,0.05);
            padding-left: 1.5rem;
        }
        .breadcrumb {
            background-color: var(--light-bg);
            padding: 1rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb-list {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 0.5rem;
        }
        .breadcrumb-item {
            display: flex;
            align-items: center;
        }
        .breadcrumb-item:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
            color: #666;
        }
        .breadcrumb-link {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb-link:hover {
            text-decoration: underline;
            color: var(--primary-color);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            border-radius: 8px;
            padding: 2rem;
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 2rem;
            border-bottom: 2px solid var(--accent-color);
            padding-bottom: 1rem;
        }
        .article-title {
            font-size: 2.2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        .article-meta {
            display: flex;
            gap: 1.5rem;
            color: #666;
            font-size: 0.9rem;
        }
        .meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .meta-item i {
            color: var(--secondary-color);
        }
        .section {
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid var(--border-color);
        }
        .section-title {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .section-title i {
            color: var(--accent-color);
        }
        .subsection-title {
            font-size: 1.4rem;
            color: var(--secondary-color);
            margin: 1.5rem 0 1rem;
            padding-left: 1rem;
            border-left: 4px solid var(--accent-color);
        }
        .problem-box {
            background: linear-gradient(135deg, #fff5f5 0%, #ffe8e8 100%);
            border-left: 4px solid var(--error-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .solution-box {
            background: linear-gradient(135deg, #f0fff4 0%, #e6ffe6 100%);
            border-left: 4px solid var(--success-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .tip-box {
            background: linear-gradient(135deg, #fff9e6 0%, #fff2cc 100%);
            border-left: 4px solid var(--accent-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .box-title {
            font-weight: 700;
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .feature-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 2rem 0;
            box-shadow: 0 6px 20px rgba(0,0,0,0.1);
            transition: var(--transition);
        }
        .feature-image:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.15);
        }
        .interactive-section {
            background: var(--light-bg);
            border-radius: 8px;
            padding: 2rem;
            margin: 3rem 0;
        }
        .search-container, .comment-container, .rating-container {
            margin-bottom: 2rem;
        }
        .section-heading {
            font-size: 1.5rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-label {
            font-weight: 600;
            color: var(--primary-color);
        }
        .form-input, .form-textarea {
            padding: 0.75rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(58, 110, 165, 0.1);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .btn {
            padding: 0.75rem 1.5rem;
            background: var(--secondary-color);
            color: white;
            border: none;
            border-radius: 4px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }
        .btn:hover {
            background: var(--primary-color);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
        }
        .btn-accent {
            background: var(--accent-color);
        }
        .btn-accent:hover {
            background: #e6892a;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
            flex-direction: row-reverse;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: #ffc107;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        @media (max-width: 992px) {
            .sidebar {
                order: -1;
            }
        }
        .sidebar-widget {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.3rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid var(--accent-color);
        }
        .related-links {
            list-style: none;
        }
        .related-link {
            margin-bottom: 0.75rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px dashed var(--border-color);
        }
        .related-link:last-child {
            margin-bottom: 0;
            border-bottom: none;
        }
        .related-link a {
            color: var(--text-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            transition: var(--transition);
        }
        .related-link a:hover {
            color: var(--secondary-color);
            padding-left: 0.5rem;
        }
        .related-link i {
            color: var(--accent-color);
            font-size: 0.9rem;
        }
        .quick-nav {
            background: linear-gradient(135deg, var(--primary-color) 0%, #2a2d43 100%);
            color: white;
            padding: 1.5rem;
            border-radius: 8px;
        }
        .quick-nav-title {
            color: white;
            margin-bottom: 1rem;
        }
        .quick-nav-list {
            list-style: none;
        }
        .quick-nav-item {
            margin-bottom: 0.75rem;
        }
        .quick-nav-item a {
            color: white;
            text-decoration: none;
            display: block;
            padding: 0.5rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .quick-nav-item a:hover {
            background-color: rgba(255,255,255,0.1);
            color: var(--accent-color);
        }
        .web-links {
            background: var(--light-bg);
            padding: 2rem 0;
            margin-top: 3rem;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
        }
        .web-link {
            background: white;
            padding: 1rem;
            border-radius: 4px;
            border-left: 3px solid var(--secondary-color);
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .web-link a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }
        .web-link:hover a {
            color: var(--secondary-color);
        }
        .footer {
            background: var(--primary-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            color: var(--accent-color);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .article-title {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .main-content {
                gap: 1.5rem;
            }
            .article-content, .sidebar-widget {
                padding: 1.5rem;
            }
            .web-links-container {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            .article-title {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 0.5rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out;
        }
        .text-bold {
            font-weight: 700;
        }
        .text-accent {
            color: var(--accent-color);
        }
        .text-secondary {
            color: var(--secondary-color);
        }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mt-3 { margin-top: 3rem; }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }