* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            color: #333;
            line-height: 1.7;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            color: #2c5aa0;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        a:hover {
            color: #e63946;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .section-padding {
            padding: 60px 0;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .italic { font-style: italic; }
        .highlight {
            background-color: #fffacd;
            padding: 2px 5px;
            border-radius: 3px;
        }
        .site-header {
            background: #1a365d;
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: #ffd166;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: #e63946;
        }
        .my-logo:hover {
            color: #ffd166;
            text-decoration: none;
        }
        .search-form {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-input {
            flex: 1;
            padding: 12px 15px;
            border: none;
            border-radius: 30px 0 0 30px;
            font-size: 1rem;
            outline: none;
        }
        .search-btn {
            background: #e63946;
            color: white;
            border: none;
            border-radius: 0 30px 30px 0;
            padding: 0 25px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-btn:hover {
            background: #d62839;
        }
        .main-nav {
            background: #2a4a7a;
        }
        .nav-list {
            display: flex;
            list-style: none;
            justify-content: center;
            flex-wrap: wrap;
        }
        .nav-list li {
            position: relative;
        }
        .nav-list a {
            color: #f1faee;
            display: block;
            padding: 18px 24px;
            font-weight: 600;
            text-transform: uppercase;
            font-size: 0.95rem;
            letter-spacing: 0.5px;
        }
        .nav-list a:hover {
            background: #3a5a8a;
            text-decoration: none;
            color: #ffd166;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            background: #e9ecef;
            padding: 12px 20px;
            border-bottom: 1px solid #ddd;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb span {
            color: #777;
        }
        .main-content {
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 25px rgba(0,0,0,0.05);
            padding: 40px;
            margin: 30px auto;
        }
        .article-header {
            border-bottom: 3px solid #ffd166;
            padding-bottom: 25px;
            margin-bottom: 40px;
        }
        .article-header h1 {
            font-size: 2.8rem;
            color: #1a365d;
            line-height: 1.2;
            margin-bottom: 15px;
        }
        .article-meta {
            color: #666;
            font-size: 0.95rem;
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
        }
        .article-meta i {
            margin-right: 5px;
        }
        .content-section h2 {
            font-size: 2rem;
            color: #2a4a7a;
            margin: 45px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px dashed #ddd;
        }
        .content-section h3 {
            font-size: 1.6rem;
            color: #3a5a8a;
            margin: 35px 0 15px;
        }
        .content-section h4 {
            font-size: 1.3rem;
            color: #4a6a9a;
            margin: 25px 0 10px;
        }
        .content-section p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .content-section ul, .content-section ol {
            margin: 20px 0 20px 30px;
            font-size: 1.1rem;
        }
        .content-section li {
            margin-bottom: 10px;
        }
        .note-box {
            background: #f1f8ff;
            border-left: 5px solid #2c5aa0;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .tip-box {
            background: #f0fff4;
            border-left: 5px solid #38a169;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .image-wrapper {
            margin: 30px auto;
            text-align: center;
            max-width: 800px;
        }
        .image-wrapper img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            transition: transform 0.5s;
        }
        .image-wrapper img:hover {
            transform: scale(1.02);
        }
        .image-caption {
            font-style: italic;
            color: #666;
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .interactive-section {
            background: #f8f9fa;
            padding: 30px;
            border-radius: 10px;
            margin: 40px 0;
            border: 1px solid #dee2e6;
        }
        .interactive-section h3 {
            margin-top: 0;
        }
        .rating-form, .comment-form {
            display: grid;
            gap: 15px;
            margin-top: 20px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 5px;
            font-weight: 600;
        }
        .form-control {
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 1rem;
        }
        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }
        .stars {
            display: flex;
            gap: 10px;
            direction: rtl;
        }
        .stars input {
            display: none;
        }
        .stars label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .stars input:checked ~ label,
        .stars label:hover,
        .stars label:hover ~ label {
            color: #ffc107;
        }
        .btn {
            background: #2c5aa0;
            color: white;
            border: none;
            padding: 14px 25px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: background 0.3s;
            align-self: start;
        }
        .btn:hover {
            background: #1a365d;
            text-decoration: none;
        }
        .site-footer {
            background: #1a365d;
            color: #f1faee;
            padding: 50px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: #ffd166;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: #ffd166;
        }
        friend-link {
            display: inline-block;
            background: #2a4a7a;
            color: #ffd166;
            padding: 8px 15px;
            border-radius: 5px;
            margin: 5px;
            font-weight: 600;
        }
        friend-link a {
            color: inherit;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #2a4a7a;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 992px) {
            .header-top {
                flex-direction: column;
                gap: 20px;
            }
            .search-form {
                max-width: 100%;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
                position: absolute;
                top: 20px;
                right: 20px;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                z-index: 999;
            }
            .nav-list {
                flex-direction: column;
            }
            .nav-list a {
                padding: 15px;
                border-bottom: 1px solid #3a5a8a;
            }
            .main-nav.active {
                display: block;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            .content-section h2 {
                font-size: 1.8rem;
            }
            .content-section h3 {
                font-size: 1.5rem;
            }
            .main-content {
                padding: 25px;
                margin: 20px auto;
            }
        }