* { 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-color: #f8f9fa;
            background-image: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #2c5aa0; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #e63946; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 2em; margin-bottom: 1.5em; }
        p { margin-bottom: 1.5em; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(90deg, #0d1b2a 0%, #1b3a4b 100%);
            color: #fff;
            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-family: 'Trebuchet MS', sans-serif;
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, #ffd166, #ef476f);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -1px;
        }
        .my-logo:hover { opacity: 0.9; }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            padding-left: 0;
            margin: 0;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
            color: #6c757d;
        }
        .breadcrumb a { color: #495057; }
        .breadcrumb a:hover { color: #0d1b2a; }
        .main-nav ul {
            display: flex;
            list-style: none;
        }
        .main-nav li { margin-left: 2rem; }
        .main-nav a {
            color: #caf0f8;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #ffd166;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after,
        .main-nav a.active::after { width: 100%; }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #ffd166;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                position: fixed;
                top: 80px;
                left: -100%;
                flex-direction: column;
                background: #1b3a4b;
                width: 100%;
                text-align: center;
                transition: 0.3s;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                padding: 2rem 0;
                z-index: 999;
            }
            .main-nav.active ul {
                left: 0;
            }
            .main-nav li {
                margin: 1.5rem 0;
            }
        }
        .page-hero {
            text-align: center;
            padding: 3rem 1rem;
            background: linear-gradient(rgba(13, 27, 42, 0.85), rgba(27, 58, 75, 0.9)), url('https://images.unsplash.com/photo-1581235720841-0aa191d3c0c8?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            margin-bottom: 3rem;
            border-radius: 0 0 20px 20px;
        }
        .page-hero h1 {
            font-size: 3.2rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .page-hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            opacity: 0.95;
        }
        .search-box {
            max-width: 600px;
            margin: 2rem auto 3rem;
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.08);
        }
        .search-box h3 {
            margin-bottom: 1rem;
            color: #0d1b2a;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .search-box form {
            display: flex;
        }
        .search-box input {
            flex-grow: 1;
            padding: 15px;
            border: 2px solid #ced4da;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-box input:focus {
            border-color: #2c5aa0;
        }
        .search-box button {
            background: linear-gradient(90deg, #2c5aa0, #4a7bc8);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-weight: 600;
            transition: opacity 0.3s;
        }
        .search-box button:hover {
            opacity: 0.9;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }
        .article-content h2 {
            color: #0d1b2a;
            font-size: 2.2rem;
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #ffd166;
        }
        .article-content h3 {
            color: #1b3a4b;
            font-size: 1.8rem;
            margin: 2rem 0 1rem;
        }
        .article-content h4 {
            color: #2c5aa0;
            font-size: 1.4rem;
            margin: 1.5rem 0 1rem;
        }
        .article-content p {
            font-size: 1.1rem;
            line-height: 1.8;
            margin-bottom: 1.8rem;
        }
        .article-content strong {
            color: #e63946;
            font-weight: 700;
        }
        .article-content emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .info-box {
            background: #e9f5ff;
            border-left: 5px solid #2c5aa0;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .chart-img-container {
            text-align: center;
            margin: 3rem 0;
            padding: 1.5rem;
            background: #f8f9fa;
            border-radius: 12px;
            border: 1px dashed #adb5bd;
        }
        .chart-img-container img {
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            margin: 0 auto 1rem;
        }
        .chart-img-container figcaption {
            font-style: italic;
            color: #6c757d;
            margin-top: 0.5rem;
        }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: 16px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.05);
            height: fit-content;
        }
        .sidebar h3 {
            color: #0d1b2a;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #ffd166;
        }
        .sidebar ul {
            list-style: none;
            padding-left: 0;
        }
        .sidebar li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #eee;
        }
        .sidebar li:last-child {
            border-bottom: none;
        }
        .sidebar a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #495057;
            font-weight: 500;
        }
        .sidebar a:hover {
            color: #2c5aa0;
        }
        .user-interaction {
            background: white;
            padding: 2.5rem;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            margin-top: 3rem;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }
        .interaction-box {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 12px;
            border: 1px solid #dee2e6;
        }
        .interaction-box h3 {
            color: #1b3a4b;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .interaction-box form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .interaction-box input,
        .interaction-box textarea,
        .interaction-box select {
            padding: 12px 15px;
            border: 1px solid #ced4da;
            border-radius: 8px;
            font-size: 1rem;
            font-family: inherit;
            transition: border-color 0.3s;
        }
        .interaction-box input:focus,
        .interaction-box textarea:focus {
            border-color: #2c5aa0;
            outline: none;
        }
        .interaction-box textarea {
            min-height: 120px;
            resize: vertical;
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            margin: 10px 0;
        }
        .rating-stars input { display: none; }
        .rating-stars label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating-stars label:hover,
        .rating-stars label:hover ~ label,
        .rating-stars input:checked ~ label { color: #ffc107; }
        .interaction-box button {
            background: linear-gradient(90deg, #2c5aa0, #4a7bc8);
            color: white;
            border: none;
            padding: 15px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: opacity 0.3s;
            margin-top: 10px;
        }
        .interaction-box button:hover { opacity: 0.9; }
        .site-footer {
            background: #0d1b2a;
            color: #caf0f8;
            padding: 3rem 0 1.5rem;
            margin-top: auto;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #ffd166;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-section ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-section li { margin-bottom: 0.8rem; }
        .footer-section a {
            color: #adb5bd;
            transition: color 0.3s;
        }
        .footer-section a:hover { color: #ffd166; }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: 8px;
            margin-top: 1rem;
            font-style: italic;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #1b3a4b;
            color: #8d99ae;
            font-size: 0.9rem;
        }
        .last-updated {
            background: #fff3cd;
            color: #856404;
            padding: 0.8rem;
            border-radius: 8px;
            margin: 2rem 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
        }
        .highlight {
            background: linear-gradient(120deg, #ffd16630 0%, #ffd16610 100%);
            padding: 0.2em 0.4em;
            border-radius: 4px;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(90deg, #e63946, #ff6b6b);
            color: white;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
            box-shadow: 0 4px 15px rgba(230, 57, 70, 0.3);
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(230, 57, 70, 0.4);
        }