:root {
            --primary-blue: #0066cc;
            --primary-red: #ff4444;
            --primary-yellow: #ffcc00;
            --primary-green: #00aa44;
            --primary-black: #1a1a1a;
            --light-bg: #f8f9fa;
            --card-shadow: 0 8px 20px rgba(0, 102, 204, 0.12);
            --transition: all 0.3s ease;
            --border-radius: 12px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: var(--light-bg);
            color: #333;
            line-height: 1.7;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--primary-blue);
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-red);
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary-blue) 0%, #004d99 100%);
            color: white;
            padding: 1.5rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 2px;
            background: linear-gradient(to right, #fff, #ffcc00);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        .my-logo:hover {
            transform: scale(1.02);
        }
        .desktop-nav {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
        }
        .nav-link {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav-link:hover {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-nav {
            position: fixed;
            top: 80px;
            left: 0;
            width: 100%;
            background-color: var(--primary-blue);
            flex-direction: column;
            padding: 1rem;
            gap: 1rem;
            display: none;
            z-index: 999;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .mobile-nav.active {
            display: flex;
        }
        .breadcrumb {
            background-color: #fff;
            padding: 1rem;
            border-radius: var(--border-radius);
            margin: 1.5rem 0;
            font-size: 0.9rem;
            box-shadow: var(--card-shadow);
        }
        .breadcrumb a {
            margin: 0 0.3rem;
        }
        .breadcrumb a:first-child {
            margin-left: 0;
        }
        .breadcrumb .separator {
            color: #999;
            margin: 0 0.5rem;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: white;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--card-shadow);
        }
        .update-time {
            font-style: italic;
            color: #666;
            border-left: 4px solid var(--primary-yellow);
            padding-left: 1rem;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        h1 {
            color: var(--primary-black);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--primary-red);
            padding-bottom: 0.8rem;
        }
        h2 {
            color: var(--primary-blue);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-top: 1rem;
        }
        h3 {
            color: var(--primary-green);
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: #555;
            font-size: 1.2rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.05rem;
        }
        .intro {
            font-size: 1.2rem;
            background-color: #f0f8ff;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 5px solid var(--primary-blue);
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fffde7;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border: 2px dashed var(--primary-yellow);
            margin: 2rem 0;
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .card-item {
            background: white;
            border-radius: 10px;
            padding: 1.5rem 1rem;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: var(--transition);
            border-top: 5px solid var(--primary-red);
        }
        .card-item:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.1);
        }
        .card-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }
        .image-container {
            margin: 2.5rem 0;
            text-align: center;
        }
        .article-image {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            transition: var(--transition);
        }
        .article-image:hover {
            transform: scale(1.01);
        }
        .img-caption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .link-list {
            background-color: #f9f9f9;
            padding: 1.8rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
        }
        .link-list ul {
            list-style-type: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 0.8rem;
        }
        .link-list li {
            padding: 0.5rem 0;
            border-bottom: 1px dotted #ddd;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.8rem;
        }
        .widget {
            background-color: white;
            padding: 1.8rem;
            border-radius: var(--border-radius);
            box-shadow: var(--card-shadow);
        }
        .widget h3 {
            margin-top: 0;
            color: var(--primary-blue);
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 0.7rem;
        }
        .search-box {
            display: flex;
        }
        .search-input {
            flex: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid #ddd;
            border-right: none;
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }
        .search-input:focus {
            border-color: var(--primary-blue);
        }
        .search-button {
            background-color: var(--primary-blue);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: #0052a3;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #ffcc00;
            margin: 1rem 0;
            cursor: pointer;
        }
        .star:hover,
        .star.active {
            color: #ff9900;
        }
        .rating-form button {
            background-color: var(--primary-green);
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            margin-top: 1rem;
            transition: var(--transition);
        }
        .rating-form button:hover {
            background-color: #008c36;
        }
        .comments-section {
            margin-top: 3rem;
            padding-top: 2.5rem;
            border-top: 2px solid #eee;
        }
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
            margin-bottom: 2.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #555;
        }
        .form-input,
        .form-textarea {
            padding: 0.9rem 1.2rem;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus,
        .form-textarea:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-button {
            background-color: var(--primary-blue);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: var(--transition);
            align-self: flex-start;
        }
        .submit-button:hover {
            background-color: #0052a3;
            transform: translateY(-3px);
        }
        footer {
            background-color: var(--primary-black);
            color: #ddd;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
            position: relative;
            padding-bottom: 0.7rem;
        }
        .footer-section h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background-color: var(--primary-red);
        }
        friend-link {
            display: block;
            margin: 0.7rem 0;
            color: #aaa;
            transition: var(--transition);
        }
        friend-link:hover {
            color: white;
            padding-left: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .article-content {
                padding: 1.8rem;
            }
            .card-grid {
                grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
            }
        }
        .bold {
            font-weight: 800;
            color: var(--primary-black);
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .text-center {
            text-align: center;
        }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .py-1 { padding-top: 1rem; padding-bottom: 1rem; }