* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.7;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #2a5db0;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #1e3a8a;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        section {
            padding: 40px 0;
        }
        h1, h2, h3, h4 {
            color: #1e293b;
            font-weight: 700;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            margin-top: 0.5rem;
            color: #1d4ed8;
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid #3b82f6;
            padding-left: 15px;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 2rem;
        }
        h4 {
            font-size: 1.4rem;
            margin-top: 1.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: #475569;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #e0f2fe;
            padding: 15px 20px;
            border-radius: 10px;
            border-left: 4px solid #0284c7;
            margin: 25px 0;
        }
        .updated-time {
            font-size: 0.9rem;
            color: #64748b;
            text-align: right;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px dashed #cbd5e1;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        header {
            background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
            color: white;
            padding: 15px 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: white;
            display: flex;
            align-items: center;
        }
        .my-logo i {
            margin-right: 10px;
            color: #fbbf24;
        }
        .my-logo:hover {
            color: #fbbf24;
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav ul li {
            margin-left: 25px;
        }
        nav ul li a {
            color: white;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 6px;
            transition: all 0.3s;
        }
        nav ul li a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: #fbbf24;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.95rem;
            color: #64748b;
        }
        .breadcrumb a {
            color: #3b82f6;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            margin: 0 8px;
        }
        .hero {
            background: linear-gradient(rgba(30, 58, 138, 0.85), rgba(59, 130, 246, 0.9)), url('https://images.unsplash.com/photo-1635070041078-e363dbe005cb?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            text-align: center;
            padding: 80px 20px;
            border-radius: 0 0 20px 20px;
            margin-bottom: 40px;
        }
        .hero h1 {
            color: white;
            font-size: 3.2rem;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
            margin-bottom: 20px;
        }
        .hero p {
            font-size: 1.4rem;
            max-width: 800px;
            margin: 0 auto 30px;
        }
        .search-box {
            background: white;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
            margin-bottom: 40px;
        }
        .search-box h2 {
            border-left: none;
            text-align: center;
            padding: 0;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 20px auto 0;
        }
        .search-form input {
            flex-grow: 1;
            padding: 15px 20px;
            border: 2px solid #cbd5e1;
            border-radius: 50px 0 0 50px;
            font-size: 1.1rem;
            outline: none;
            transition: border 0.3s;
        }
        .search-form input:focus {
            border-color: #3b82f6;
        }
        .search-form button {
            background: #3b82f6;
            color: white;
            border: none;
            padding: 0 30px;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.1rem;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #1d4ed8;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            align-items: start;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            background: white;
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .sidebar {
            background: white;
            padding: 25px;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            font-size: 1.5rem;
            border-bottom: 2px solid #3b82f6;
            padding-bottom: 10px;
            margin-bottom: 20px;
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar ul li {
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px dashed #e2e8f0;
        }
        .sidebar ul li:last-child {
            border-bottom: none;
        }
        .sidebar ul li a {
            display: block;
            padding: 8px 5px;
            border-radius: 5px;
        }
        .sidebar ul li a:hover {
            background-color: #f1f5f9;
        }
        .interactive-box {
            background: white;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
            margin-top: 40px;
        }
        .rating-form, .comment-form {
            margin-top: 25px;
        }
        .stars {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
        }
        .star {
            font-size: 2rem;
            color: #cbd5e1;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star.active,
        .star:hover {
            color: #fbbf24;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 8px;
            color: #475569;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #cbd5e1;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #3b82f6;
            outline: none;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .btn {
            background: #3b82f6;
            color: white;
            border: none;
            padding: 14px 28px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-block;
        }
        .btn:hover {
            background: #1d4ed8;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(59, 130, 246, 0.4);
        }
        footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            color: white;
            margin-bottom: 15px;
        }
        .footer-links h4 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 20px;
            border-bottom: 2px solid #3b82f6;
            padding-bottom: 8px;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links ul li {
            margin-bottom: 10px;
        }
        .footer-links ul li a {
            color: #94a3b8;
        }
        .footer-links ul li a:hover {
            color: #3b82f6;
            padding-left: 5px;
        }
        .friend-link {
            background: #334155;
            padding: 15px;
            border-radius: 8px;
            margin-top: 10px;
            border-left: 4px solid #3b82f6;
        }
        .friend-link a {
            color: #60a5fa;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #334155;
            font-size: 0.9rem;
            color: #94a3b8;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .hero h1 { font-size: 2.5rem; }
            .hero p { font-size: 1.2rem; }
            .header-container {
                flex-wrap: wrap;
            }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #1e3a8a;
                position: absolute;
                top: 70px;
                left: 0;
                padding: 20px;
                border-radius: 0 0 15px 15px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            nav ul.active {
                display: flex;
            }
            nav ul li {
                margin: 10px 0;
            }
            .hamburger {
                display: block;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form input {
                border-radius: 50px;
                margin-bottom: 10px;
            }
            .search-form button {
                border-radius: 50px;
                padding: 15px;
            }
            .article-body,
            .search-box,
            .interactive-box {
                padding: 25px;
            }
        }