* { 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: #1a73e8; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #0d47a1; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(90deg, #0a2472, #1e3c8c);
            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;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: #4fc3f7;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
            font-family: 'Arial Black', sans-serif;
            letter-spacing: 1px;
        }
        .my-logo:hover { color: #80deea; text-decoration: none; }
        .nav-desktop { display: flex; gap: 1.8rem; }
        .nav-desktop a {
            color: #e3f2fd;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 5px;
        }
        .nav-desktop a:hover {
            background: rgba(255, 255, 255, 0.15);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #1e3c8c;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 10px 15px rgba(0,0,0,0.2);
        }
        .nav-mobile.active { display: flex; }
        .nav-mobile a {
            color: white;
            padding: 0.8rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            background: #e8f4fd;
            margin-bottom: 1.5rem;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb span { color: #777; }
        main { flex: 1; padding: 2rem 0; }
        article { background: white; padding: 2.5rem; border-radius: 15px; box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08); }
        h1 {
            font-size: 2.8rem;
            color: #0a2472;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #4fc3f7;
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: #1a237e;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e0f7fa;
        }
        h3 { font-size: 1.6rem; color: #283593; margin: 1.8rem 0 0.8rem; }
        h4 { font-size: 1.3rem; color: #3949ab; margin: 1.5rem 0 0.6rem; }
        p { margin-bottom: 1.2rem; text-align: justify; }
        .lead {
            font-size: 1.2rem;
            color: #555;
            font-weight: 500;
            background: #f1f8ff;
            padding: 1.2rem;
            border-radius: 8px;
            border-left: 4px solid #1a73e8;
            margin-bottom: 2rem;
        }
        .highlight {
            background: linear-gradient(120deg, #e1f5fe 0%, #b3e5fc 100%);
            padding: 1.5rem;
            border-radius: 10px;
            border: 1px solid #4fc3f7;
            margin: 1.5rem 0;
        }
        .highlight strong { color: #0d47a1; }
        .info-box {
            background: #f9fbe7;
            border-left: 5px solid #cddc39;
            padding: 1.2rem;
            margin: 1.5rem 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);
            border: 3px solid #e3f2fd;
        }
        .link-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .link-list a {
            display: block;
            background: #f8fdff;
            padding: 0.8rem 1.2rem;
            border-radius: 8px;
            border: 1px solid #bbdefb;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .link-list a:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(30, 60, 140, 0.1);
            text-decoration: none;
        }
        .interactive-section {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
            border: 1px dashed #1a73e8;
        }
        .interactive-section h3 { text-align: center; }
        .form-group {
            margin-bottom: 1.2rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, select, textarea {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, select:focus, textarea:focus {
            border-color: #1a73e8;
            outline: none;
            box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.2);
        }
        button, .btn {
            background: linear-gradient(to right, #1a73e8, #0d47a1);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-block;
            text-align: center;
        }
        button:hover, .btn:hover {
            background: linear-gradient(to right, #0d47a1, #08306b);
            transform: scale(1.03);
            text-decoration: none;
            box-shadow: 0 5px 15px rgba(13, 71, 161, 0.3);
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
            font-size: 1.8rem;
            color: #ffc107;
            justify-content: center;
        }
        .rating i { cursor: pointer; }
        .site-footer {
            background: #0a122a;
            color: #cfd8dc;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-logo { font-size: 2rem; color: #4fc3f7; margin-bottom: 1rem; }
        .footer-heading { color: #bbdefb; font-size: 1.3rem; margin-bottom: 1.2rem; }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
        }
        friend-link a {
            color: #90caf9;
            padding: 0.3rem 0;
            display: inline-block;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #1c3b6a;
            font-size: 0.9rem;
            color: #8a9fb5;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .float-img { float: none; margin: 1rem auto; max-width: 90%; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .nav-desktop { display: none; }
            .header-container { flex-wrap: wrap; }
            .container { padding: 0 15px; }
            article { padding: 1.5rem; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .link-list { grid-template-columns: 1fr; }
            .interactive-section { padding: 1.5rem; }
        }