* { 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: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        img { max-width: 100%; height: auto; display: block; }
        .site-header {
            background: linear-gradient(90deg, #1e3c72 0%, #2a5298 100%);
            color: white;
            padding: 1.5rem 0;
            border-radius: 0 0 15px 15px;
            box-shadow: 0 5px 20px rgba(30, 60, 114, 0.2);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 2px;
            background: linear-gradient(to right, #00c9ff, #92fe9d);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-decoration: none;
            padding: 5px 10px;
            border-radius: 8px;
        }
        .my-logo:hover {
            transform: scale(1.05);
            transition: transform 0.3s ease;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .main-nav a {
            color: #d1e8ff;
            text-decoration: none;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 5px;
            transition: all 0.3s ease;
        }
        .main-nav a:hover, .main-nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            color: white;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            padding: 10px;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #666;
        }
        .breadcrumb a {
            color: #2a5298;
            text-decoration: none;
        }
        .breadcrumb a:hover { text-decoration: underline; }
        .search-container {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-form input {
            flex: 1;
            padding: 15px 20px;
            border: 2px solid #2a5298;
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
            outline: none;
        }
        .search-form button {
            background: linear-gradient(90deg, #2a5298, #1e3c72);
            color: white;
            border: none;
            padding: 0 30px;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: opacity 0.3s;
        }
        .search-form button:hover { opacity: 0.9; }
        main {
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            padding: 2.5rem;
            margin: 2rem 0;
        }
        article h1 {
            font-size: 2.8rem;
            color: #1e3c72;
            margin-bottom: 1.5rem;
            border-left: 6px solid #00c9ff;
            padding-left: 20px;
            line-height: 1.2;
        }
        article h2 {
            color: #2a5298;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 10px;
            border-bottom: 2px solid #eaeaea;
        }
        article h3 {
            color: #3a6bc9;
            margin: 2rem 0 1rem;
        }
        article h4 {
            color: #555;
            margin: 1.5rem 0 0.8rem;
        }
        article p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .highlight-box {
            background: linear-gradient(120deg, #fdfbfb 0%, #ebedee 100%);
            border-left: 5px solid #00c9ff;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 10px 10px 0;
            box-shadow: 0 4px 8px rgba(0,0,0,0.04);
        }
        .internal-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .internal-links a {
            background: #f0f8ff;
            padding: 15px;
            border-radius: 8px;
            text-decoration: none;
            color: #2a5298;
            font-weight: 600;
            transition: all 0.3s;
            border: 1px solid #d1e3ff;
        }
        .internal-links a:hover {
            background: #2a5298;
            color: white;
            transform: translateY(-5px);
        }
        .feature-img {
            width: 100%;
            border-radius: 12px;
            overflow: hidden;
            margin: 2.5rem 0;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .feature-img img {
            width: 100%;
            transition: transform 0.5s ease;
        }
        .feature-img:hover img {
            transform: scale(1.03);
        }
        .interactive-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .comment-box, .rating-box {
            background: #f9fbff;
            padding: 2rem;
            border-radius: 12px;
            border: 1px solid #e1e8f5;
        }
        .interactive-section h3 { margin-top: 0; }
        .interactive-section textarea, .interactive-section input {
            width: 100%;
            padding: 15px;
            margin-bottom: 15px;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-family: inherit;
        }
        .interactive-section button {
            background: linear-gradient(90deg, #00c9ff, #92fe9d);
            color: #1e3c72;
            border: none;
            padding: 15px 25px;
            border-radius: 50px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
        }
        .interactive-section button:hover {
            transform: scale(1.05);
            box-shadow: 0 5px 15px rgba(0,201,255,0.3);
        }
        .stars {
            display: flex;
            gap: 10px;
            margin: 15px 0;
            font-size: 1.8rem;
            color: #ffcc00;
            cursor: pointer;
        }
        footer {
            background: #1a1a2e;
            color: #b0b7c3;
            padding: 3rem 2rem;
            border-radius: 15px 15px 0 0;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            color: #00c9ff;
            margin-bottom: 1rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        friend-link {
            background: rgba(255,255,255,0.05);
            padding: 10px 20px;
            border-radius: 6px;
            transition: background 0.3s;
        }
        friend-link a {
            color: #92fe9d;
            text-decoration: none;
        }
        friend-link:hover {
            background: rgba(0,201,255,0.2);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #888;
        }
        @media (max-width: 768px) {
            .header-container { flex-direction: column; align-items: flex-start; }
            .main-nav { width: 100%; margin-top: 1rem; }
            .main-nav ul { flex-direction: column; gap: 0.5rem; display: none; }
            .main-nav.active ul { display: flex; }
            .hamburger { display: block; }
            article h1 { font-size: 2.2rem; }
            article { padding: 1.5rem; }
            .interactive-section { grid-template-columns: 1fr; }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        article, .search-container, .interactive-section {
            animation: fadeIn 0.8s ease-out;
        }