:root {
            --primary: #2c3e50;
            --secondary: #e74c3c;
            --accent: #f39c12;
            --light: #ecf0f1;
            --dark: #1a1a1a;
            --text: #333333;
            --gray: #95a5a6;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            background-attachment: fixed;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: rgba(26, 26, 46, 0.95);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 2px solid var(--secondary);
            box-shadow: var(--shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(45deg, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-decoration: none;
            letter-spacing: 1px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            transform: scale(1.05);
            text-shadow: 0 0 15px rgba(231, 76, 60, 0.3);
        }
        .my-logo i {
            font-size: 2.5rem;
            color: var(--secondary);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        nav a {
            color: var(--light);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 8px 15px;
            border-radius: var(--radius);
            transition: var(--transition);
            position: relative;
        }
        nav a:hover {
            background: var(--secondary);
            color: white;
            transform: translateY(-2px);
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background: var(--accent);
            transition: width 0.3s ease;
        }
        nav a:hover::after {
            width: 80%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 5px;
        }
        .hamburger span {
            width: 30px;
            height: 3px;
            background: var(--light);
            border-radius: 3px;
            transition: var(--transition);
        }
        .breadcrumb {
            background: rgba(255, 255, 255, 0.05);
            padding: 15px;
            border-radius: var(--radius);
            margin: 20px 0;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--gray);
            margin: 0 10px;
        }
        main {
            background: rgba(255, 255, 255, 0.97);
            border-radius: 20px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
            padding: 40px;
            margin: 30px auto;
            position: relative;
            overflow: hidden;
        }
        main::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: linear-gradient(90deg, var(--secondary), var(--accent));
        }
        h1 {
            font-size: 3.2rem;
            color: var(--primary);
            margin-bottom: 25px;
            line-height: 1.2;
            text-align: center;
            position: relative;
            padding-bottom: 20px;
        }
        h1::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 200px;
            height: 4px;
            background: linear-gradient(90deg, var(--secondary), var(--accent));
            border-radius: 2px;
        }
        h2 {
            font-size: 2.4rem;
            color: var(--secondary);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px dashed var(--gray);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--primary);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.4rem;
            color: #555;
            margin: 25px 0 10px;
            font-style: italic;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.3rem;
            color: var(--dark);
            background: linear-gradient(90deg, rgba(243, 156, 18, 0.1), rgba(231, 76, 60, 0.1));
            padding: 25px;
            border-radius: var(--radius);
            border-left: 5px solid var(--accent);
            margin-bottom: 40px;
        }
        .highlight {
            background: linear-gradient(120deg, rgba(243, 156, 18, 0.2) 0%, rgba(243, 156, 18, 0) 100%);
            padding: 20px;
            border-radius: var(--radius);
            margin: 25px 0;
            border-left: 4px solid var(--accent);
        }
        .tip-box {
            background: rgba(52, 152, 219, 0.1);
            border: 2px solid #3498db;
            border-radius: var(--radius);
            padding: 20px;
            margin: 25px 0;
            position: relative;
        }
        .tip-box::before {
            content: '💡 PRO TIP';
            position: absolute;
            top: -12px;
            left: 20px;
            background: #3498db;
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: bold;
        }
        em {
            color: var(--secondary);
            font-style: normal;
            font-weight: 700;
        }
        strong {
            color: var(--primary);
            font-weight: 800;
        }
        a.content-link {
            color: var(--secondary);
            text-decoration: none;
            border-bottom: 2px dotted var(--secondary);
            transition: var(--transition);
            padding: 0 2px;
        }
        a.content-link:hover {
            background: rgba(231, 76, 60, 0.1);
            border-bottom-style: solid;
        }
        .image-container {
            text-align: center;
            margin: 40px 0;
        }
        .feature-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 15px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 5px solid white;
        }
        .feature-img:hover {
            transform: scale(1.02);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
        }
        .img-caption {
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .search-section {
            background: linear-gradient(135deg, var(--primary), #34495e);
            padding: 40px;
            border-radius: var(--radius);
            margin: 50px 0;
            text-align: center;
            color: white;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 30px auto 0;
        }
        .search-input {
            flex: 1;
            padding: 18px 25px;
            border: none;
            border-radius: 50px 0 0 50px;
            font-size: 1.1rem;
            outline: none;
            background: rgba(255, 255, 255, 0.95);
        }
        .search-btn {
            background: linear-gradient(45deg, var(--secondary), #c0392b);
            color: white;
            border: none;
            border-radius: 0 50px 50px 0;
            padding: 0 35px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .search-btn:hover {
            background: linear-gradient(45deg, #c0392b, var(--secondary));
            letter-spacing: 1px;
        }
        .interaction-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 60px 0;
        }
        .comment-box, .rating-box {
            background: white;
            border-radius: var(--radius);
            padding: 30px;
            box-shadow: var(--shadow);
            border-top: 5px solid var(--accent);
        }
        .rating-box {
            border-top-color: var(--secondary);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--primary);
        }
        .form-control {
            width: 100%;
            padding: 15px;
            border: 2px solid #ddd;
            border-radius: var(--radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--accent);
            outline: none;
            box-shadow: 0 0 0 3px rgba(243, 156, 18, 0.2);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(45deg, var(--secondary), var(--accent));
            color: white;
            border: none;
            padding: 16px 40px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(231, 76, 60, 0.3);
            letter-spacing: 1px;
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 20px 0;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2.5rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: var(--accent);
        }
        .related-links {
            background: rgba(52, 73, 94, 0.05);
            padding: 30px;
            border-radius: var(--radius);
            margin: 50px 0;
        }
        .related-links h3 {
            text-align: center;
            color: var(--secondary);
        }
        .links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin-top: 25px;
        }
        .links-grid a {
            background: white;
            padding: 15px;
            border-radius: var(--radius);
            text-decoration: none;
            color: var(--primary);
            font-weight: 600;
            transition: var(--transition);
            border-left: 4px solid var(--accent);
            display: flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        .links-grid a:hover {
            transform: translateX(10px);
            background: var(--light);
            border-left-color: var(--secondary);
        }
        .links-grid i {
            color: var(--secondary);
            font-size: 1.2rem;
        }
        footer {
            background: var(--dark);
            color: var(--light);
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: var(--accent);
            font-size: 1.5rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-section h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: var(--secondary);
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin: 20px 0;
        }
        friend-link {
            background: rgba(255, 255, 255, 0.1);
            padding: 10px 20px;
            border-radius: 30px;
            transition: var(--transition);
        }
        friend-link a {
            color: var(--light);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        friend-link:hover {
            background: rgba(231, 76, 60, 0.3);
            transform: translateY(-3px);
        }
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 45px;
            height: 45px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: white;
            font-size: 1.3rem;
            transition: var(--transition);
        }
        .social-links a:hover {
            background: var(--secondary);
            transform: translateY(-5px) rotate(10deg);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.95rem;
            color: var(--gray);
        }
        .update-time {
            background: rgba(243, 156, 18, 0.1);
            padding: 15px;
            border-radius: var(--radius);
            margin: 30px 0;
            text-align: center;
            font-style: italic;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2.1rem; }
            main { padding: 30px; }
        }
        @media (max-width: 768px) {
            .header-content { flex-wrap: wrap; }
            nav { width: 100%; order: 3; margin-top: 20px; display: none; }
            nav.active { display: block; }
            nav ul { flex-direction: column; gap: 10px; }
            .hamburger { display: flex; }
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.9rem; }
            .search-form { flex-direction: column; }
            .search-input, .search-btn { border-radius: var(--radius); width: 100%; }
            .search-btn { justify-content: center; margin-top: 10px; padding: 18px; }
            .interaction-section { grid-template-columns: 1fr; }
        }
        @media (max-width: 480px) {
            html { font-size: 14px; }
            .container { padding: 0 15px; }
            main { padding: 20px; margin: 15px auto; }
            h1 { font-size: 2rem; }
            .my-logo { font-size: 1.8rem; }
            .footer-content { grid-template-columns: 1fr; }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.8s ease forwards;
        }
        .stagger-delay-1 { animation-delay: 0.1s; }
        .stagger-delay-2 { animation-delay: 0.2s; }
        .stagger-delay-3 { animation-delay: 0.3s; }
        ::-webkit-scrollbar {
            width: 10px;
        }
        ::-webkit-scrollbar-track {
            background: var(--dark);
        }
        ::-webkit-scrollbar-thumb {
            background: linear-gradient(var(--secondary), var(--accent));
            border-radius: 5px;
        }