* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-dark: #1a2a3a;
            --primary-accent: #f0b132;
            --secondary-accent: #4a90e2;
            --light-bg: #f8f9fa;
            --dark-text: #2c3e50;
            --medium-gray: #7f8c8d;
            --card-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
            --transition-fast: all 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #fff;
            color: var(--dark-text);
            line-height: 1.7;
            overflow-x: hidden;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: var(--secondary-accent);
            transition: var(--transition-fast);
        }
        a:hover {
            color: var(--primary-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: var(--primary-dark);
            color: white;
            padding: 1.2rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            letter-spacing: -0.5px;
        }
        .logo span {
            color: var(--primary-accent);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2.5rem;
        }
        .main-nav a {
            color: #e0e0e0;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover, .main-nav a.active {
            color: var(--primary-accent);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-accent);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .search-container {
            position: relative;
            width: 280px;
        }
        .search-container form {
            display: flex;
        }
        .search-input {
            width: 100%;
            padding: 0.75rem 1rem 0.75rem 2.8rem;
            border: none;
            border-radius: 30px;
            background-color: rgba(255,255,255,0.12);
            color: white;
            font-size: 1rem;
            outline: none;
            transition: background-color 0.3s;
        }
        .search-input::placeholder {
            color: #b0b7c3;
        }
        .search-input:focus {
            background-color: rgba(255,255,255,0.2);
        }
        .search-btn {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            background: transparent;
            border: none;
            color: #b0b7c3;
            cursor: pointer;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: var(--light-bg);
            padding: 1rem 0;
            border-bottom: 1px solid #eaeaea;
            font-size: 0.95rem;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.7rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.7rem;
            color: var(--medium-gray);
        }
        .breadcrumb a {
            color: var(--medium-gray);
        }
        .breadcrumb a:hover {
            color: var(--primary-accent);
        }
        .main-content {
            flex: 1;
            padding: 3rem 0;
        }
        .article-header {
            margin-bottom: 3rem;
            text-align: center;
        }
        .article-header h1 {
            font-size: 3.2rem;
            line-height: 1.2;
            color: var(--primary-dark);
            margin-bottom: 1.2rem;
        }
        .article-meta {
            color: var(--medium-gray);
            font-size: 1rem;
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .meta-item i {
            margin-right: 0.5rem;
            color: var(--primary-accent);
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 3.5rem;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            font-size: 1.125rem;
        }
        .article-body section {
            margin-bottom: 3.5rem;
        }
        .article-body h2 {
            font-size: 2.3rem;
            color: var(--primary-dark);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.75rem;
            border-bottom: 3px solid var(--primary-accent);
        }
        .article-body h3 {
            font-size: 1.8rem;
            color: #34495e;
            margin: 2rem 0 1rem;
        }
        .article-body p {
            margin-bottom: 1.6rem;
            text-align: justify;
        }
        .highlight-box {
            background: linear-gradient(135deg, #fdfcfb 0%, #f5f7fa 100%);
            border-left: 5px solid var(--secondary-accent);
            padding: 2rem;
            margin: 2.5rem 0;
            border-radius: 0 8px 8px 0;
            box-shadow: var(--card-shadow);
        }
        .highlight-box h4 {
            color: var(--primary-dark);
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }
        .key-term {
            font-weight: 800;
            color: var(--primary-dark);
            background-color: rgba(240, 177, 50, 0.15);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
        }
        .info-note {
            background-color: #e8f4fc;
            border: 1px dashed #4a90e2;
            padding: 1.2rem;
            border-radius: 8px;
            margin: 1.8rem 0;
            display: flex;
            align-items: flex-start;
            gap: 1rem;
        }
        .info-note i {
            color: #4a90e2;
            font-size: 1.3rem;
            flex-shrink: 0;
            margin-top: 0.2rem;
        }
        .image-container {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 900px;
        }
        .image-container img {
            border-radius: 10px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            transition: transform 0.4s ease, box-shadow 0.4s ease;
        }
        .image-container img:hover {
            transform: scale(1.015);
            box-shadow: 0 15px 35px rgba(0,0,0,0.15);
        }
        .image-caption {
            font-style: italic;
            color: var(--medium-gray);
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .sidebar-widget {
            background-color: white;
            border-radius: 12px;
            padding: 1.8rem;
            margin-bottom: 2rem;
            box-shadow: var(--card-shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.5rem;
            color: var(--primary-dark);
            margin-bottom: 1.5rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid #eee;
        }
        .rating-widget form, .comment-widget form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .rating-stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0;
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
        }
        .rating-stars .star:hover,
        .rating-stars .star:hover ~ .star {
            color: #ffc107;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            cursor: pointer;
        }
        .rating-stars input:checked ~ label {
            color: #ffc107;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-group label {
            font-weight: 600;
            font-size: 0.95rem;
        }
        .form-control {
            padding: 0.9rem 1rem;
            border: 1px solid #dcdcdc;
            border-radius: 6px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--secondary-accent);
        }
        .btn {
            background-color: var(--primary-accent);
            color: var(--primary-dark);
            border: none;
            padding: 1rem 1.8rem;
            border-radius: 6px;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            transition: var(--transition-fast);
            text-align: center;
        }
        .btn:hover {
            background-color: #e6a520;
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(240, 177, 50, 0.25);
        }
        .btn-secondary {
            background-color: var(--secondary-accent);
            color: white;
        }
        .btn-secondary:hover {
            background-color: #3a7bc8;
        }
        .internal-links {
            padding: 3rem 0;
            background-color: var(--light-bg);
            border-top: 1px solid #eaeaea;
            border-bottom: 1px solid #eaeaea;
        }
        .internal-links h2 {
            text-align: center;
            margin-bottom: 2.5rem;
            color: var(--primary-dark);
            font-size: 2.2rem;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
            transition: var(--transition-fast);
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 18px rgba(0,0,0,0.08);
        }
        .web-link a {
            font-weight: 600;
            color: var(--dark-text);
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .web-link a:hover {
            color: var(--primary-accent);
        }
        .web-link i {
            color: var(--primary-accent);
        }
        .site-footer {
            background-color: var(--primary-dark);
            color: #cfd9e6;
            padding: 3.5rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 3rem;
        }
        .footer-col h4 {
            color: white;
            font-size: 1.4rem;
            margin-bottom: 1.8rem;
            position: relative;
            padding-bottom: 0.8rem;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 3px;
            background: var(--primary-accent);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.9rem;
        }
        .footer-links a {
            color: #b0b7c3;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: var(--primary-accent);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #2c3e50;
            color: #95a5a6;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease-out;
                order: 3;
                margin-top: 1rem;
            }
            .main-nav.active {
                max-height: 300px;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                width: 100%;
                border-top: 1px solid rgba(255,255,255,0.1);
            }
            .main-nav a {
                display: block;
                padding: 1rem 0;
            }
            .search-container {
                width: 100%;
                order: 2;
                margin-top: 1rem;
            }
            .article-header h1 {
                font-size: 2.5rem;
            }
            .article-body h2 {
                font-size: 2rem;
            }
            .article-body h3 {
                font-size: 1.6rem;
            }
            .content-wrapper {
                gap: 2rem;
            }
        }