* {
            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: #f5f7fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            color: #2a6dc9;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #e63946;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            padding-left: 1.5em;
            margin-bottom: 1.5em;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        .site-header {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2rem;
            font-weight: bold;
            background: linear-gradient(to right, #ffd166, #ef476f);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: 1px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
        }
        .my-logo:hover {
            transform: scale(1.02);
        }
        .main-nav {
            display: flex;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-list a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-list a:hover {
            color: #ffd166;
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: #ffd166;
            transition: width 0.3s ease;
        }
        .nav-list a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            padding-left: 0;
            margin: 0;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 0.5rem;
            color: #6c757d;
        }
        .breadcrumb a {
            color: #495057;
        }
        .breadcrumb a:hover {
            color: #1e3c72;
        }
        .search-section {
            background-color: #2a5298;
            padding: 2rem 0;
            text-align: center;
            margin-bottom: 3rem;
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }
        .search-input {
            flex-grow: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        .search-button {
            background: linear-gradient(to right, #ef476f, #ff9a5a);
            color: white;
            border: none;
            padding: 0 2rem;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .search-button:hover {
            background: linear-gradient(to right, #d43a5e, #e88a4a);
            transform: scale(1.02);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        @media (max-width: 768px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            color: #1e3c72;
            border-bottom: 2px solid #ffd166;
            padding-bottom: 0.5rem;
            margin-bottom: 1.5rem;
            font-size: 1.4rem;
        }
        .sidebar ul {
            list-style: none;
            padding-left: 0;
        }
        .sidebar li {
            margin-bottom: 0.8rem;
            padding-left: 1.2rem;
            position: relative;
        }
        .sidebar li::before {
            content: '▶';
            position: absolute;
            left: 0;
            color: #ef476f;
            font-size: 0.8rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #1e3c72;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid #ffd166;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #2a5298;
            margin: 2.5rem 0 1.2rem;
            padding-top: 0.5rem;
        }
        h3 {
            font-size: 1.6rem;
            color: #3a6bc2;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #4a7cd2;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: #495057;
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-left: 5px solid #2a5298;
            border-radius: 0 10px 10px 0;
            margin-bottom: 2.5rem;
        }
        strong {
            color: #1e3c72;
            font-weight: 700;
        }
        .highlight-box {
            background: linear-gradient(135deg, #e3f2fd, #fce4ec);
            border-left: 5px solid #ef476f;
            padding: 1.5rem;
            border-radius: 0 10px 10px 0;
            margin: 2rem 0;
        }
        .image-container {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        .image-container img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
            transition: transform 0.5s ease, box-shadow 0.5s ease;
        }
        .image-container img:hover {
            transform: scale(1.01);
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.2);
        }
        .image-caption {
            font-style: italic;
            color: #6c757d;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .content-link {
            background-color: #e3f2fd;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .content-link:hover {
            background-color: #bbdefb;
        }
        .interactive-section {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            margin-bottom: 3rem;
        }
        .interactive-section h2 {
            text-align: center;
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #495057;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #ced4da;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #2a5298;
            box-shadow: 0 0 0 0.2rem rgba(42, 82, 152, 0.25);
        }
        .rating {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0;
            font-size: 2rem;
        }
        .rating input {
            display: none;
        }
        .rating label {
            color: #ddd;
            cursor: pointer;
            transition: color 0.3s ease;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #ffd700;
        }
        .submit-button {
            background: linear-gradient(to right, #1e3c72, #2a5298);
            color: white;
            border: none;
            padding: 1rem 2rem;
            font-size: 1.1rem;
            border-radius: 50px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: block;
            margin: 1.5rem auto 0;
            font-weight: bold;
        }
        .submit-button:hover {
            background: linear-gradient(to right, #2a5298, #3a6bc2);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(0, 0, 0, 0.1);
        }
        .site-footer {
            background: #1a1a2e;
            color: #e0e0e0;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: #ffd166;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
            color: #a3b5d9;
        }
        friend-link:hover {
            color: #ffd166;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        .update-time {
            background-color: #2a5298;
            color: white;
            padding: 0.8rem;
            text-align: center;
            font-size: 0.9rem;
            border-radius: 0 0 10px 10px;
            margin-top: -1.5rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .article-content, .interactive-section { padding: 2rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav { display: none; width: 100%; }
            .nav-active { display: block; }
            .header-inner { flex-wrap: wrap; }
            .nav-list {
                flex-direction: column;
                width: 100%;
                gap: 0;
                margin-top: 1rem;
                background-color: rgba(30, 60, 114, 0.95);
                padding: 1rem;
                border-radius: 10px;
            }
            .nav-list li { margin-bottom: 0.8rem; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .lead { font-size: 1.1rem; }
            .search-form { flex-direction: column; border-radius: 10px; }
            .search-input, .search-button { border-radius: 0; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            .article-content, .interactive-section { padding: 1.5rem; }
            h1 { font-size: 1.8rem; }
            .rating { font-size: 1.5rem; }
        }