* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #2E8B57;
            --secondary: #FF6B35;
            --accent: #4CC9F0;
            --dark: #1A3C40;
            --light: #F8F9FA;
            --gray: #6C757D;
            --transition: all 0.3s ease;
        }
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
            max-width: 100vw;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        header {
            background: linear-gradient(135deg, var(--dark), #2a5d67);
            color: white;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--accent);
            transform: scale(1.02);
        }
        .my-logo i {
            color: var(--secondary);
        }
        .desktop-nav {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
        }
        .desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .desktop-nav a: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 {
            display: none;
            flex-direction: column;
            background-color: var(--dark);
            padding: 1rem;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            padding: 0.8rem 1rem;
            border-bottom: 1px solid rgba(255,255,255,0.05);
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            background-color: rgba(255,255,255,0.1);
            padding-left: 1.5rem;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--gray);
            margin: 0 5px;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        .content-area {
            background-color: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        h1 {
            color: var(--dark);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 5px solid var(--secondary);
            padding-left: 1rem;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
        }
        h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        h3 {
            color: var(--dark);
            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;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--dark);
            font-weight: 500;
            background-color: #f0f9ff;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 4px solid var(--accent);
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fff9db;
            padding: 1.5rem;
            border-radius: 8px;
            border: 1px solid #ffec99;
            margin: 1.5rem 0;
        }
        .word-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 0.8rem;
            margin: 1.5rem 0;
        }
        .word {
            background-color: #e7f5ff;
            padding: 0.8rem 1rem;
            border-radius: 6px;
            text-align: center;
            font-weight: 600;
            color: var(--primary);
            transition: var(--transition);
        }
        .word:hover {
            background-color: #d0ebff;
            transform: translateY(-3px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        .bonus-word {
            background-color: #fff4e6;
            color: #e8590c;
        }
        .article-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            margin: 2rem auto;
            display: block;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            transition: var(--transition);
        }
        .article-img:hover {
            transform: scale(1.01);
            box-shadow: 0 12px 25px rgba(0,0,0,0.15);
        }
        a.content-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dashed var(--primary);
            transition: var(--transition);
        }
        a.content-link:hover {
            color: var(--secondary);
            border-bottom: 1px solid var(--secondary);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background-color: white;
            border-radius: 10px;
            padding: 1.8rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .widget h3 {
            font-size: 1.4rem;
            margin-top: 0;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .search-form {
            display: flex;
            margin-top: 1rem;
        }
        .search-input {
            flex: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid #ddd;
            border-right: none;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary);
        }
        .search-btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
        }
        .search-btn:hover {
            background-color: #26734d;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #FFC107;
        }
        .submit-rating {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            margin-top: 1rem;
            transition: var(--transition);
        }
        .submit-rating:hover {
            background-color: #e55a2b;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid #ddd;
            border-radius: 6px;
            font-size: 1rem;
            resize: vertical;
            min-height: 120px;
            margin-top: 1rem;
            transition: var(--transition);
        }
        .comment-form textarea:focus {
            outline: none;
            border-color: var(--primary);
        }
        .submit-comment {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            margin-top: 1rem;
            transition: var(--transition);
        }
        .submit-comment:hover {
            background-color: #26734d;
        }
        .related-links {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .related-links a {
            color: var(--dark);
            text-decoration: none;
            padding: 0.8rem 1rem;
            background-color: #f8f9fa;
            border-radius: 6px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-links a:hover {
            background-color: #e9ecef;
            transform: translateX(5px);
            color: var(--primary);
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: 6px;
            margin: 0.5rem 0;
        }
        friend-link a {
            color: var(--accent) !important;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .update-time {
            background-color: #e7f5ff;
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            margin: 2rem 0;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
        }
        .emoji {
            font-size: 1.2rem;
            margin-right: 5px;
        }
        .key-term {
            background-color: #fff3cd;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
            color: #856404;
        }
        .mobile-only {
            display: none;
        }
        @media (max-width: 768px) {
            .content-area {
                padding: 1.5rem;
            }
            .mobile-only {
                display: block;
            }
            .widget {
                padding: 1.5rem;
            }
        }
        @media print {
            header, .sidebar, footer, .breadcrumb {
                display: none;
            }
            main {
                display: block;
            }
            .content-area {
                box-shadow: none;
                padding: 0;
            }
        }