:root {
            --primary-blue: #1a5f7a;
            --secondary-blue: #1597bb;
            --accent-yellow: #ffc93c;
            --light-bg: #f8f9fa;
            --dark-text: #333333;
            --light-text: #666666;
            --border-color: #dee2e6;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark-text);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            color: var(--primary-blue);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--secondary-blue);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-blue) 0%, #0d4a63 100%);
            color: white;
            padding: 1.2rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent-yellow);
        }
        .my-logo:hover {
            color: white;
            text-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .desktop-nav a {
            color: white;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .desktop-nav a:hover {
            color: var(--accent-yellow);
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--accent-yellow);
            transition: width 0.3s ease;
        }
        .desktop-nav a:hover::after {
            width: 100%;
        }
        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            background-color: var(--primary-blue);
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            display: block;
        }
        .mobile-nav ul {
            list-style: none;
        }
        .mobile-nav li {
            margin: 1rem 0;
        }
        .mobile-nav a {
            color: white;
            font-weight: 600;
            display: block;
            padding: 0.5rem;
            border-radius: 5px;
        }
        .mobile-nav a:hover {
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--accent-yellow);
        }
        .breadcrumb {
            background-color: var(--light-bg);
            padding: 1rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: var(--light-text);
        }
        .search-section {
            background-color: var(--light-bg);
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            text-align: center;
            box-shadow: var(--shadow);
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 1rem auto 0;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid var(--border-color);
            border-right: none;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-input:focus {
            border-color: var(--secondary-blue);
        }
        .search-button {
            background-color: var(--secondary-blue);
            color: white;
            border: none;
            padding: 0 1.8rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: background-color 0.3s;
        }
        .search-button:hover {
            background-color: var(--primary-blue);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 3rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            font-size: 1.08rem;
        }
        .sidebar {
            background-color: var(--light-bg);
            padding: 1.8rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            align-self: start;
        }
        .sidebar h3 {
            color: var(--primary-blue);
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-yellow);
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar li {
            margin-bottom: 0.8rem;
        }
        .sidebar a {
            display: block;
            padding: 0.5rem 0.8rem;
            border-radius: 5px;
            background-color: white;
            border-left: 4px solid var(--secondary-blue);
            transition: all 0.3s;
        }
        .sidebar a:hover {
            background-color: #e3f2fd;
            transform: translateX(5px);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-blue);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2.1rem;
            color: var(--primary-blue);
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-yellow);
        }
        h3 {
            font-size: 1.7rem;
            color: #0d4a63;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--secondary-blue);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.4rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--dark-text);
            background-color: #f0f8ff;
            padding: 1.5rem;
            border-left: 5px solid var(--accent-yellow);
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 1.5rem;
            border-radius: 10px;
            border: 1px dashed var(--accent-yellow);
            margin: 1.5rem 0;
        }
        .highlight p:last-child {
            margin-bottom: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 2rem auto;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        figcaption {
            text-align: center;
            font-style: italic;
            color: var(--light-text);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        strong {
            color: var(--primary-blue);
            font-weight: 700;
        }
        em {
            color: var(--secondary-blue);
        }
        blockquote {
            font-style: italic;
            border-left: 4px solid var(--secondary-blue);
            padding-left: 1.5rem;
            margin: 2rem 0 2rem 1.5rem;
            color: var(--light-text);
        }
        .rating-section, .comments-section {
            background-color: var(--light-bg);
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
            box-shadow: var(--shadow);
        }
        .rating-form, .comment-form {
            margin-top: 1.5rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: var(--accent-yellow);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark-text);
        }
        input, textarea, select {
            width: 100%;
            padding: 0.9rem;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--secondary-blue);
        }
        button[type="submit"] {
            background-color: var(--secondary-blue);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s, transform 0.2s;
        }
        button[type="submit"]:hover {
            background-color: var(--primary-blue);
            transform: translateY(-2px);
        }
        .site-footer {
            background-color: #0a3d52;
            color: #ccc;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
        }
        friend-link a {
            color: #a3d9ff;
        }
        friend-link a:hover {
            color: white;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #1a5f7a;
            color: #aaa;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .desktop-nav { display: none; }
            .mobile-nav-toggle { display: block; }
            .header-content { padding: 0 15px; }
            .search-form { flex-direction: column; }
            .search-input { border-radius: 8px; border-right: 2px solid var(--border-color); margin-bottom: 0.5rem; }
            .search-button { border-radius: 8px; padding: 0.9rem; }
        }