* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #10b981;
            --accent: #f59e0b;
            --text: #1f2937;
            --text-light: #6b7280;
            --bg: #f9fafb;
            --card-bg: #ffffff;
            --border: #e5e7eb;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        body {
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.6;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: var(--card-bg);
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo a {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
        }
        .logo i {
            margin-right: 10px;
            color: var(--accent);
        }
        .nav-desktop {
            display: flex;
            gap: 25px;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            font-weight: 600;
            padding: 5px 0;
            position: relative;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: var(--transition);
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: var(--text);
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background-color: var(--card-bg);
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: var(--shadow);
            padding: 20px;
            z-index: 99;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
            font-weight: 600;
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #f1f5f9;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            color: var(--text-light);
            margin: 0 8px;
        }
        main {
            flex: 1;
            padding: 30px 0;
        }
        .article-header {
            margin-bottom: 40px;
            text-align: center;
        }
        .article-header h1 {
            font-size: 2.5rem;
            color: var(--text);
            margin-bottom: 15px;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            .article-header h1 {
                font-size: 2rem;
            }
        }
        .meta-info {
            display: flex;
            justify-content: center;
            gap: 20px;
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 20px;
        }
        .meta-info i {
            margin-right: 5px;
        }
        .content-section {
            margin-bottom: 40px;
            background-color: var(--card-bg);
            border-radius: var(--radius);
            padding: 30px;
            box-shadow: var(--shadow);
        }
        h2 {
            font-size: 1.8rem;
            color: var(--primary-dark);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--text);
            margin: 25px 0 15px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
        }
        .highlight {
            background-color: #fef3c7;
            border-left: 4px solid var(--accent);
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .highlight p {
            margin-bottom: 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .feature-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--radius);
            margin: 30px auto;
            display: block;
            box-shadow: var(--shadow);
        }
        .interactive-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }
        .interactive-box {
            background-color: var(--card-bg);
            border-radius: var(--radius);
            padding: 25px;
            box-shadow: var(--shadow);
        }
        .interactive-box h3 {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 0;
        }
        .interactive-box form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        label {
            margin-bottom: 5px;
            font-weight: 600;
        }
        input, textarea, select {
            padding: 12px 15px;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            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(37, 99, 235, 0.1);
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: var(--radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        button:hover {
            background-color: var(--primary-dark);
        }
        .stars {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .star {
            font-size: 1.5rem;
            color: #d1d5db;
            cursor: pointer;
            transition: var(--transition);
        }
        .star.active,
        .star:hover {
            color: var(--accent);
        }
        .web-links {
            background-color: #1e293b;
            color: white;
            padding: 40px 0;
            margin-top: 50px;
        }
        .web-links .container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 20px;
        }
        .web-link {
            background-color: #334155;
            padding: 15px;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: #475569;
            transform: translateY(-3px);
        }
        .web-link a {
            color: #e2e8f0;
            display: block;
        }
        .web-link a:hover {
            color: white;
        }
        footer {
            background-color: #0f172a;
            color: #cbd5e1;
            padding: 40px 0 20px;
            text-align: center;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 30px;
        }
        .copyright {
            font-size: 0.9rem;
            color: #94a3b8;
            border-top: 1px solid #334155;
            padding-top: 20px;
            width: 100%;
        }
        .text-center {
            text-align: center;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .mt-30 {
            margin-top: 30px;
        }
        .bold {
            font-weight: 700;
            color: var(--text);
        }
        .flex {
            display: flex;
            align-items: center;
        }
        .gap-10 {
            gap: 10px;
        }