* {
            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: 100%;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #2a5bd7;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #1a3fa0;
        }
        ul, ol {
            padding-left: 1.5rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .highlight {
            background: linear-gradient(120deg, #a8edea80 0%, #fed6e380 100%);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
        }
        .py-1 { padding-top: 1rem; padding-bottom: 1rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }
        .my-2 { margin-top: 2rem; margin-bottom: 2rem; }
        .site-header {
            background: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo span {
            color: #4dabf7;
        }
        .logo i {
            color: #ff6b6b;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
        }
        .nav-desktop a {
            color: #e9ecef;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-desktop a:hover {
            color: #4dabf7;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #4dabf7;
            transition: width 0.3s;
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #2c5364;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: #e9ecef;
            padding: 0.8rem 0;
            border-bottom: 1px solid #405d6e;
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            background: #e9ecef;
            padding: 0.8rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb .container {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb a {
            color: #495057;
        }
        .breadcrumb a:hover {
            color: #2a5bd7;
        }
        .breadcrumb span {
            color: #6c757d;
        }
        .search-section {
            background: #ffffff;
            padding: 1.5rem 0;
            border-bottom: 1px solid #dee2e6;
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem 1.5rem;
            border: none;
            font-size: 1rem;
            background: #f8f9fa;
        }
        .search-button {
            background: linear-gradient(90deg, #36d1dc 0%, #5b86e5 100%);
            color: white;
            border: none;
            padding: 0 2rem;
            cursor: pointer;
            font-weight: 600;
            transition: opacity 0.3s;
        }
        .search-button:hover {
            opacity: 0.9;
        }
        .main-content {
            background: white;
            padding: 2rem 0;
            border-radius: 8px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
            margin: 2rem auto;
        }
        @media (min-width: 992px) {
            .main-content {
                display: grid;
                grid-template-columns: 1fr 300px;
                gap: 2.5rem;
            }
        }
        .article-content {
            padding: 0 1rem;
        }
        .sidebar {
            padding: 1rem;
            background: #f8f9fa;
            border-radius: 8px;
            height: fit-content;
        }
        @media (max-width: 991px) {
            .sidebar {
                margin-top: 2rem;
            }
        }
        h1 {
            font-size: 2.8rem;
            color: #0f2027;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #4dabf7;
            padding-bottom: 0.5rem;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
        }
        h2 {
            font-size: 2rem;
            color: #203a43;
            margin: 2.5rem 0 1rem;
            padding-top: 1rem;
            border-top: 1px solid #dee2e6;
        }
        h3 {
            font-size: 1.6rem;
            color: #2c5364;
            margin: 1.8rem 0 0.8rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #405d6e;
            margin: 1.5rem 0 0.6rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            color: #495057;
            background: #f1f3f5;
            padding: 1.5rem;
            border-left: 4px solid #36d1dc;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2rem;
        }
        .quote {
            font-style: italic;
            color: #5b86e5;
            border-left: 4px solid #5b86e5;
            padding-left: 1.5rem;
            margin: 1.5rem 0;
        }
        .tip-box {
            background: #e7f5ff;
            border: 1px solid #a5d8ff;
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.5rem 0;
        }
        .tip-box i {
            color: #339af0;
            margin-right: 0.5rem;
        }
        .article-image {
            margin: 2rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            max-width: 800px;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #6c757d;
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        .content-link {
            color: #5b86e5;
            border-bottom: 1px dashed #a5d8ff;
        }
        .content-link:hover {
            border-bottom-style: solid;
        }
        .widget {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        .widget-title {
            font-size: 1.3rem;
            color: #203a43;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #4dabf7;
        }
        .link-list a {
            display: block;
            padding: 0.7rem 0;
            border-bottom: 1px solid #e9ecef;
            color: #495057;
        }
        .link-list a:hover {
            color: #2a5bd7;
            background: #f8f9fa;
            padding-left: 0.5rem;
        }
        .link-list a:last-child {
            border-bottom: none;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 1.8rem;
            color: #ffd43b;
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars i {
            transition: transform 0.2s;
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        label {
            margin-bottom: 0.3rem;
            font-weight: 600;
            color: #495057;
        }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid #ced4da;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #5b86e5;
            box-shadow: 0 0 0 3px rgba(91, 134, 229, 0.2);
        }
        button[type="submit"] {
            background: linear-gradient(90deg, #36d1dc 0%, #5b86e5 100%);
            color: white;
            border: none;
            padding: 1rem;
            border-radius: 6px;
            font-weight: 700;
            cursor: pointer;
            transition: opacity 0.3s;
        }
        button[type="submit"]:hover {
            opacity: 0.9;
        }
        .site-footer {
            background: #0f2027;
            color: #e9ecef;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-widget h3 {
            color: #4dabf7;
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
            border-bottom: 2px solid #2c5364;
            padding-bottom: 0.5rem;
        }
        .footer-links a {
            display: block;
            color: #adb5bd;
            padding: 0.4rem 0;
        }
        .footer-links a:hover {
            color: #4dabf7;
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            margin: 0.5rem 0;
        }
        friend-link a {
            color: #74c0fc;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2c5364;
            color: #adb5bd;
            font-size: 0.9rem;
        }