* { 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%, #c3cfe2 100%);
            min-height: 100vh;
        }
        a { color: #2c3e50; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #e74c3c; }
        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(to right, #1a2980, #26d0ce);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 2px;
            background: linear-gradient(to right, #ffd89b, #19547b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            filter: drop-shadow(2px 2px 3px rgba(0,0,0,0.3));
        }
        .my-logo:hover {
            transform: scale(1.03);
            transition: transform 0.3s;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: rgba(255,255,255,0.15);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #ecf0f1;
            font-size: 0.9rem;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
            color: #7f8c8d;
        }
        .search-box {
            margin: 2rem auto;
            max-width: 600px;
            padding: 0 1rem;
        }
        .search-form {
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .search-input {
            flex-grow: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1rem;
            outline: none;
        }
        .search-btn {
            background: linear-gradient(to right, #e74c3c, #c0392b);
            color: white;
            border: none;
            padding: 0 2rem;
            cursor: pointer;
            font-size: 1.1rem;
        }
        .search-btn:hover {
            background: linear-gradient(to right, #c0392b, #a93226);
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .content-wrapper { grid-template-columns: 1fr; }
        }
        .main-article {
            background: white;
            border-radius: 15px;
            padding: 3rem;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }
        .article-meta {
            color: #7f8c8d;
            margin-bottom: 2rem;
            font-size: 0.95rem;
            border-bottom: 1px dashed #bdc3c7;
            padding-bottom: 1rem;
        }
        h1, h2, h3, h4 {
            color: #2c3e50;
            margin-top: 2rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 3rem;
            background: linear-gradient(90deg, #1a2980, #26d0ce);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            border-bottom: 3px solid #26d0ce;
            padding-bottom: 0.5rem;
        }
        h2 { font-size: 2.2rem; color: #1a2980; }
        h3 { font-size: 1.8rem; color: #2980b9; }
        h4 { font-size: 1.4rem; color: #16a085; }
        p { margin-bottom: 1.5rem; text-align: justify; }
        .lead {
            font-size: 1.3rem;
            color: #2c3e50;
            font-weight: 500;
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-left: 5px solid #e74c3c;
            border-radius: 0 8px 8px 0;
        }
        strong { color: #e74c3c; }
        em { color: #27ae60; }
        .highlight-box {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
        }
        .feature-img {
            width: 100%;
            border-radius: 10px;
            margin: 2rem 0;
            border: 5px solid white;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            transition: transform 0.5s;
        }
        .feature-img:hover {
            transform: scale(1.01);
        }
        .sidebar {
            background: white;
            border-radius: 15px;
            padding: 2rem;
            box-shadow: 0 8px 20px rgba(0,0,0,0.06);
            align-self: start;
        }
        .sidebar h3 {
            margin-top: 0;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #26d0ce;
        }
        .sidebar ul {
            list-style: none;
            margin-top: 1rem;
        }
        .sidebar li {
            margin-bottom: 0.8rem;
            padding-left: 1.5rem;
            position: relative;
        }
        .sidebar li::before {
            content: "▸";
            color: #e74c3c;
            position: absolute;
            left: 0;
        }
        .related-links a {
            display: block;
            padding: 0.8rem;
            background: #f8f9fa;
            border-radius: 6px;
            margin-bottom: 0.5rem;
        }
        .related-links a:hover {
            background: #e9ecef;
            transform: translateX(5px);
            transition: all 0.3s;
        }
        .interaction-section {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #ecf0f1;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }
        .form-card {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #2c3e50;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
        }
        textarea { min-height: 120px; resize: vertical; }
        .submit-btn {
            background: linear-gradient(to right, #27ae60, #229954);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: bold;
            transition: all 0.3s;
        }
        .submit-btn:hover {
            background: linear-gradient(to right, #229954, #1e8449);
            transform: translateY(-3px);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #f1c40f;
            margin-bottom: 1rem;
        }
        .star-rating i { cursor: pointer; }
        .site-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            color: #26d0ce;
            margin-bottom: 1rem;
        }
        friend-link {
            display: block;
            margin-bottom: 1rem;
            padding: 0.8rem;
            background: rgba(255,255,255,0.05);
            border-radius: 5px;
        }
        friend-link:hover {
            background: rgba(255,255,255,0.1);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a6572;
            color: #bdc3c7;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .main-nav {
                width: 100%;
                order: 3;
                margin-top: 1rem;
                display: none;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0.5rem;
            }
            .hamburger { display: block; }
            h1 { font-size: 2.3rem; }
            h2 { font-size: 1.9rem; }
            .main-article { padding: 1.5rem; }
            .content-wrapper { gap: 1.5rem; }
        }