* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            color: #4361ee;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #3a0ca3;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            padding-left: 1.5rem;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(135deg, #4361ee, #3a0ca3);
            color: white;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(67, 97, 238, 0.4);
        }
        header {
            background: white;
            box-shadow: 0 2px 15px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(to right, #4361ee, #7209b7);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            display: flex;
            align-items: center;
        }
        .logo-icon {
            margin-right: 10px;
            font-size: 2rem;
        }
        .mobile-toggle {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #4361ee;
            cursor: pointer;
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav ul li {
            margin-left: 30px;
        }
        nav ul li a {
            font-weight: 600;
            font-size: 1.05rem;
            position: relative;
            padding: 5px 0;
        }
        nav ul li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #4361ee;
            transition: width 0.3s ease;
        }
        nav ul li a:hover::after {
            width: 100%;
        }
        .breadcrumb {
            background: #e9ecef;
            padding: 12px 0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            padding-left: 0;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
            color: #6c757d;
        }
        main {
            padding: 40px 0;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 25px rgba(0,0,0,0.05);
            margin-top: 20px;
            margin-bottom: 40px;
        }
        .article-header {
            text-align: center;
            margin-bottom: 50px;
            padding-bottom: 30px;
            border-bottom: 1px solid #eee;
        }
        h1 {
            font-size: 2.8rem;
            color: #212529;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .article-meta {
            color: #6c757d;
            font-size: 0.95rem;
            margin-bottom: 25px;
        }
        .hero-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 10px;
            margin: 30px auto;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        .content-area {
            padding: 0 40px;
        }
        @media (max-width: 768px) {
            .content-area {
                padding: 0 20px;
            }
            h1 {
                font-size: 2.2rem;
            }
        }
        h2 {
            font-size: 2rem;
            color: #343a40;
            margin-top: 50px;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #f1f3f5;
        }
        h3 {
            font-size: 1.6rem;
            color: #495057;
            margin-top: 35px;
            margin-bottom: 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: #6c757d;
            margin-top: 25px;
            margin-bottom: 12px;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.25rem;
            font-weight: 300;
            color: #495057;
            margin-bottom: 2rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #f8f9fa, #e9ecef);
            border-left: 5px solid #4361ee;
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 8px 8px 0;
        }
        .note {
            background-color: #fff3cd;
            border-left: 5px solid #ffc107;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 5px 5px 0;
        }
        .feature-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 50px 0;
        }
        .feature-card {
            background: white;
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.08);
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            border: 1px solid #eee;
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.12);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: #4361ee;
            margin-bottom: 20px;
        }
        .feature-card h3 {
            margin-top: 0;
        }
        .form-container {
            background: #f8f9fa;
            border-radius: 12px;
            padding: 30px;
            margin: 40px 0;
            border: 1px solid #dee2e6;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 14px;
            border: 1px solid #ced4da;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #4361ee;
            outline: none;
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }
        .rating {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ffc107;
            margin: 10px 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            cursor: pointer;
            transition: transform 0.2s;
        }
        .rating label:hover {
            transform: scale(1.2);
        }
        .comments-section {
            margin-top: 60px;
            border-top: 1px solid #eee;
            padding-top: 40px;
        }
        .comment {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 20px;
            margin-bottom: 25px;
            border-left: 4px solid #4361ee;
        }
        .comment-meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.9rem;
            color: #6c757d;
            margin-bottom: 10px;
        }
        footer {
            background: #212529;
            color: #adb5bd;
            padding: 60px 0 30px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo a {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            margin-bottom: 20px;
            display: inline-block;
        }
        .footer-links h4, .friend-links h4 {
            color: white;
            margin-bottom: 25px;
            font-size: 1.2rem;
        }
        .footer-links ul, friend-link ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li, friend-link li {
            margin-bottom: 12px;
        }
        .footer-links a, friend-link a {
            color: #adb5bd;
            transition: color 0.3s, padding-left 0.3s;
        }
        .footer-links a:hover, friend-link a:hover {
            color: white;
            padding-left: 8px;
        }
        friend-link {
            display: block;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #495057;
            font-size: 0.9rem;
            color: #6c757d;
        }
        @media (max-width: 992px) {
            .header-top {
                flex-wrap: wrap;
            }
            nav ul {
                margin-top: 15px;
                width: 100%;
                justify-content: center;
            }
        }
        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                order: 3;
                margin-top: 20px;
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
                align-items: center;
            }
            nav ul li {
                margin: 10px 0;
            }
            .feature-box {
                grid-template-columns: 1fr;
            }
            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
        }