* {
            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: #333;
            background-color: #f8f9fa;
            background-image: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #2a5caa;
            text-decoration: none;
            transition: color 0.3s ease, background-color 0.3s ease;
        }
        a:hover {
            color: #1a3a7a;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            padding-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        h1, h2, h3, h4 {
            font-family: 'Arial Black', Gadget, sans-serif;
            color: #1a3a7a;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            text-align: center;
            margin-top: 2rem;
            margin-bottom: 1.5rem;
            color: #e68a00;
            text-shadow: 2px 2px 0 #1a3a7a;
            padding-bottom: 0.5rem;
            border-bottom: 4px solid #e68a00;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 2.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #ccc;
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 2rem;
            color: #2a5caa;
        }
        h4 {
            font-size: 1.4rem;
            margin-top: 1.5rem;
            color: #444;
        }
        strong {
            color: #e68a00;
            font-weight: 700;
        }
        blockquote {
            border-left: 5px solid #e68a00;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
            background-color: #fff9e6;
            padding: 1.5rem;
            border-radius: 0 10px 10px 0;
        }
        .site-header {
            background: linear-gradient(to right, #1a3a7a, #2a5caa);
            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;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: 'Arial Black', Gadget, sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            color: #ffcc00;
            text-decoration: none;
            text-shadow: 2px 2px 0 #1a3a7a;
            display: flex;
            align-items: center;
        }
        .my-logo:hover {
            color: #ffdb4d;
            text-decoration: none;
        }
        .my-logo i {
            margin-right: 10px;
            font-size: 2rem;
        }
        .main-nav {
            display: flex;
            align-items: center;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        .nav-list a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 5px;
        }
        .nav-list a:hover {
            background-color: rgba(255, 255, 255, 0.2);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: #1a3a7a;
                flex-direction: column;
                align-items: center;
                padding: 2rem 0;
                gap: 0;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease-in-out;
            }
            .nav-list.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .nav-list li {
                width: 100%;
                text-align: center;
            }
            .nav-list a {
                display: block;
                padding: 1rem;
                border-bottom: 1px solid #2a5caa;
            }
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e9ecef;
            border-bottom: 1px solid #dee2e6;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding-left: 0;
            margin: 0;
        }
        .breadcrumb li {
            margin-bottom: 0;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "/";
            margin: 0 0.75rem;
            color: #6c757d;
        }
        .main-content {
            flex: 1;
            padding: 2rem 0;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        article {
            background-color: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }
        .sidebar {
            background-color: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            align-self: start;
        }
        .widget {
            margin-bottom: 2.5rem;
        }
        .widget-title {
            font-size: 1.5rem;
            color: #1a3a7a;
            padding-bottom: 0.5rem;
            margin-bottom: 1.5rem;
            border-bottom: 2px solid #e68a00;
        }
        .calculator {
            background: linear-gradient(145deg, #f0f8ff, #e1f0ff);
            padding: 1.5rem;
            border-radius: 10px;
            border: 2px solid #2a5caa;
        }
        .calc-input {
            margin-bottom: 1rem;
        }
        .calc-input label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #1a3a7a;
        }
        .calc-input select,
        .calc-input input {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #aaa;
            border-radius: 5px;
            font-size: 1rem;
        }
        .calc-button {
            background: linear-gradient(to bottom, #e68a00, #cc7a00);
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: 5px;
            font-weight: bold;
            cursor: pointer;
            width: 100%;
            transition: all 0.3s;
            font-size: 1.1rem;
        }
        .calc-button:hover {
            background: linear-gradient(to bottom, #ff9900, #e68a00);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(230, 138, 0, 0.4);
        }
        .calc-result {
            margin-top: 1.5rem;
            padding: 1rem;
            background-color: #fff9e6;
            border-left: 5px solid #e68a00;
            font-weight: bold;
            font-size: 1.2rem;
            text-align: center;
            border-radius: 0 8px 8px 0;
            display: none;
        }
        .search-widget form {
            display: flex;
        }
        .search-widget input {
            flex: 1;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-right: none;
            border-radius: 5px 0 0 5px;
        }
        .search-widget button {
            background-color: #2a5caa;
            color: white;
            border: none;
            padding: 0.8rem 1.2rem;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .search-widget button:hover {
            background-color: #1a3a7a;
        }
        .related-links ul {
            list-style: none;
            padding-left: 0;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dashed #ddd;
        }
        .related-links a {
            display: flex;
            align-items: center;
            color: #333;
        }
        .related-links a:hover {
            color: #e68a00;
        }
        .related-links i {
            margin-right: 10px;
            color: #2a5caa;
        }
        .comments-section, .rating-section {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #e9ecef;
        }
        .comment-form, .rating-form {
            background-color: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin-top: 1.5rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(to bottom, #2a5caa, #1a3a7a);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 5px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
        }
        .submit-btn:hover {
            background: linear-gradient(to bottom, #3a6cba, #2a5caa);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(42, 92, 170, 0.4);
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffcc00;
        }
        .site-footer {
            background: linear-gradient(to right, #1a3a7a, #2a5caa);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }
        @media (max-width: 992px) {
            .footer-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .footer-container {
                grid-template-columns: 1fr;
            }
        }
        .footer-col h3 {
            color: #ffcc00;
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #ffcc00;
        }
        .footer-links {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: #ffcc00;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            padding: 1rem;
            background-color: rgba(255,255,255,0.1);
            border-radius: 5px;
            margin-bottom: 1rem;
            text-align: center;
            font-weight: bold;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .text-center {
            text-align: center;
        }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .highlight {
            background-color: #fff9e6;
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 5px solid #e68a00;
            margin: 2rem 0;
        }
        .update-time {
            font-style: italic;
            color: #666;
            background-color: #e9ecef;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            display: inline-block;
            margin-bottom: 1.5rem;
        }
        .responsive-img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            margin: 2rem auto;
            border: 3px solid #e68a00;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        article {
            animation: fadeIn 0.8s ease-out;
        }
        @media print {
            .site-header, .sidebar, .comments-section, .rating-section, .site-footer {
                display: none;
            }
            body {
                background: white;
                font-size: 12pt;
            }
            article {
                box-shadow: none;
                padding: 0;
            }
            a {
                color: black;
                text-decoration: underline;
            }
        }