* { 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%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #0066cc; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #d32f2f; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(90deg, #001f3f 0%, #003366 100%);
            color: white;
            padding: 1rem 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;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i { color: #ffcc00; }
        .logo-text { font-family: 'Arial Black', sans-serif; letter-spacing: 1px; }
        .wc { color: #ffcc00; }
        .up { color: #32cd32; }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: #e0e0e0;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        nav a:hover, nav a.active {
            color: white;
            background: rgba(255, 255, 255, 0.1);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background: #e9f0f7;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #d0dde9;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
            color: #777;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb a:hover { color: #d32f2f; }
        main { flex: 1; padding: 2rem 0; }
        article { background: white; border-radius: 12px; padding: 2.5rem; box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08); margin-bottom: 2rem; }
        h1 {
            font-size: 2.8rem;
            color: #003366;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #ffcc00;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #00509e;
            margin: 2rem 0 1rem;
            padding-top: 1rem;
        }
        h3 {
            font-size: 1.5rem;
            color: #d32f2f;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
            font-size: 1.05rem;
        }
        .highlight {
            background: #fff9e6;
            border-left: 5px solid #ffcc00;
            padding: 1.2rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .float-img {
            float: right;
            margin: 0 0 1rem 2rem;
            max-width: 400px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .interactive-section {
            background: #f8fafd;
            border-radius: 10px;
            padding: 2rem;
            margin: 2.5rem 0;
            border: 1px dashed #0066cc;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #003366;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid #ccc;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #0066cc;
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.2);
        }
        button {
            background: linear-gradient(to right, #0066cc, #004d99);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 6px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        button:hover {
            background: linear-gradient(to right, #0052a3, #003366);
            transform: translateY(-2px);
            box-shadow: 0 5px 12px rgba(0, 0, 0, 0.15);
        }
        .rating {
            display: flex;
            gap: 5px;
            direction: ltr;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffcc00;
        }
        .internal-links {
            margin: 2rem 0;
            padding: 1.5rem;
            background: #eef5ff;
            border-radius: 10px;
        }
        .internal-links h3 { color: #003366; margin-top: 0; }
        .internal-links ul { list-style: none; display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1rem; }
        .internal-links li { padding: 0.5rem 0; border-bottom: 1px dotted #b3d1ff; }
        .internal-links a { color: #00509e; display: block; padding: 0.3rem 0; }
        .internal-links a:hover { color: #d32f2f; padding-left: 5px; }
        .long-tail-links {
            background: #001f3f;
            color: #ccc;
            padding: 2.5rem 0;
        }
        .web-link {
            display: inline-block;
            background: rgba(255, 255, 255, 0.05);
            margin: 0.5rem;
            padding: 0.8rem 1.5rem;
            border-radius: 30px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s;
        }
        .web-link a { color: #a3d5ff; }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }
        footer {
            background: #001122;
            color: #aaa;
            text-align: center;
            padding: 2rem 0;
            font-size: 0.9rem;
        }
        .footer-container { display: flex; flex-direction: column; align-items: center; gap: 1rem; }
        .copyright { max-width: 600px; line-height: 1.6; }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            nav { display: none; width: 100%; order: 3; margin-top: 1rem; }
            nav.active { display: block; }
            nav ul { flex-direction: column; gap: 0.5rem; }
            nav a { display: block; padding: 0.8rem; }
            .hamburger { display: block; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            .float-img { float: none; margin: 1rem auto; max-width: 100%; }
            .internal-links ul { grid-template-columns: 1fr; }
            .interactive-section { padding: 1.5rem; }
        }