* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #0d47a1;
            --secondary: #ff6f00;
            --accent: #4caf50;
            --dark: #1a237e;
            --light: #e3f2fd;
            --text: #212121;
            --text-light: #757575;
            --background: #ffffff;
            --surface: #f5f5f5;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            line-height: 1.6;
            color: var(--text);
            background-color: var(--background);
            max-width: 100vw;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            color: var(--dark);
            margin-bottom: 1rem;
            line-height: 1.2;
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-top: 1.5rem;
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid var(--secondary);
            padding-left: 1rem;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-top: 2.5rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--secondary);
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark), var(--primary));
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 900;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .logo i {
            color: var(--secondary);
            font-size: 2.2rem;
        }
        .logo:hover {
            transform: scale(1.02);
            transition: var(--transition);
        }
        .main-nav {
            display: flex;
            gap: 2rem;
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-link:hover, .nav-link.active {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--surface);
            padding: 1rem 0;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 0.75rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin-left: 0.75rem;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .search-section {
            background: linear-gradient(90deg, var(--light), #ffffff);
            padding: 3rem 0;
            text-align: center;
            border-radius: 12px;
            margin: 3rem 0;
            box-shadow: var(--shadow);
        }
        .search-form {
            max-width: 600px;
            margin: 2rem auto 0;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(13, 71, 161, 0.15);
        }
        .search-input {
            flex-grow: 1;
            padding: 1.2rem 1.8rem;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        .search-btn {
            background: linear-gradient(90deg, var(--secondary), #ff9100);
            color: white;
            border: none;
            padding: 0 2.5rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: linear-gradient(90deg, #e65100, var(--secondary));
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 3rem 0;
        }
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: var(--background);
            padding: 2rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .sidebar {
            background: var(--surface);
            padding: 2rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .feature-image {
            width: 100%;
            border-radius: 12px;
            overflow: hidden;
            margin: 2.5rem 0;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
        }
        .feature-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }
        .feature-image:hover img {
            transform: scale(1.03);
        }
        .interactive-box {
            background: linear-gradient(135deg, var(--light), white);
            border-left: 5px solid var(--accent);
            padding: 2rem;
            margin: 2.5rem 0;
            border-radius: 0 12px 12px 0;
            box-shadow: var(--shadow);
        }
        .tip {
            background-color: #fff8e1;
            border-left: 4px solid #ffb300;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .warning {
            background-color: #ffebee;
            border-left: 4px solid #d32f2f;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .btn {
            display: inline-block;
            padding: 0.9rem 2.2rem;
            background: linear-gradient(90deg, var(--primary), var(--dark));
            color: white;
            text-decoration: none;
            border-radius: 50px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 12px rgba(13, 71, 161, 0.25);
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 18px rgba(13, 71, 161, 0.35);
            background: linear-gradient(90deg, var(--dark), var(--primary));
        }
        .btn-secondary {
            background: linear-gradient(90deg, var(--secondary), #ff9100);
        }
        .btn-secondary:hover {
            background: linear-gradient(90deg, #e65100, var(--secondary));
        }
        .comment-rating-section {
            background-color: var(--surface);
            padding: 3rem;
            border-radius: 12px;
            margin: 4rem 0;
            box-shadow: var(--shadow);
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            margin-top: 2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        input, textarea, select {
            padding: 1rem;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(13, 71, 161, 0.1);
        }
        textarea {
            min-height: 150px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ffc107;
            cursor: pointer;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
            padding: 3rem 0;
            border-top: 1px solid #e0e0e0;
            border-bottom: 1px solid #e0e0e0;
            margin: 3rem 0;
        }
        .web-link {
            background: var(--surface);
            padding: 1.2rem;
            border-radius: 8px;
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateY(-5px);
            background-color: var(--light);
            box-shadow: var(--shadow);
        }
        .web-link a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            display: block;
        }
        .web-link a:hover {
            text-decoration: underline;
        }
        .site-footer {
            background: linear-gradient(135deg, var(--dark), #0d1b48);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 2rem;
        }
        .copyright {
            color: #b0bec5;
            font-size: 0.95rem;
            width: 100%;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 1.5rem;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 1.2rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: var(--dark);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1.5rem;
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
            }
            .main-nav.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .search-form {
                flex-direction: column;
                border-radius: 12px;
            }
            .search-input, .search-btn {
                width: 100%;
                border-radius: 0;
            }
            .comment-rating-section {
                padding: 2rem 1.5rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.6s ease forwards;
        }
        .text-center { text-align: center; }
        .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; }
        .highlight { background-color: #fff9c4; padding: 0.2rem 0.4rem; border-radius: 3px; }
        .emoji { font-size: 1.2em; margin-right: 0.5rem; }