* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-green: #3b8526;
            --secondary-green: #5ba34a;
            --dark-bg: #1a1a1a;
            --darker-bg: #111;
            --light-text: #f0f0f0;
            --accent-brown: #8b7355;
            --accent-blue: #4a90e2;
            --card-bg: #222;
            --border-color: #444;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--dark-bg);
            color: var(--light-text);
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: var(--secondary-green);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--accent-blue);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .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-color: var(--darker-bg);
            padding: 1rem 0;
            border-bottom: 3px solid var(--primary-green);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-green);
            text-transform: uppercase;
            letter-spacing: 2px;
            display: flex;
            align-items: center;
        }
        .my-logo i {
            margin-right: 10px;
            color: var(--accent-brown);
        }
        .my-logo:hover {
            color: var(--secondary-green);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        .main-nav a:hover {
            background-color: rgba(59, 133, 38, 0.2);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--light-text);
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #2a2a2a;
            padding: 0.8rem 20px;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a {
            color: #ccc;
        }
        .breadcrumb span {
            color: #aaa;
            margin: 0 5px;
        }
        .hero {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1550745165-9bc0b252726f?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') no-repeat center center/cover;
            padding: 4rem 1rem;
            text-align: center;
            border-radius: 0 0 20px 20px;
            margin-bottom: 3rem;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            color: #fff;
            text-shadow: 2px 2px 5px #000;
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            color: #ddd;
        }
        .search-form {
            max-width: 600px;
            margin: 2rem auto;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.5);
        }
        .search-form input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1.1rem;
            background-color: #fff;
            color: #333;
        }
        .search-form button {
            background-color: var(--primary-green);
            color: white;
            border: none;
            padding: 0 2rem;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: bold;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background-color: var(--secondary-green);
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        main {
            background-color: var(--card-bg);
            padding: 2.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
        }
        aside {
            background-color: var(--card-bg);
            padding: 1.5rem;
            border-radius: 10px;
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1, h2, h3, h4 {
            color: var(--secondary-green);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 3px solid var(--accent-brown);
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid var(--primary-green);
            padding-left: 15px;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--accent-blue);
        }
        h4 {
            font-size: 1.4rem;
            color: var(--accent-brown);
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.3rem;
            background-color: rgba(59, 133, 38, 0.1);
            padding: 1.5rem;
            border-left: 5px solid var(--primary-green);
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: rgba(139, 115, 85, 0.2);
            padding: 1rem;
            border-radius: 8px;
            border: 1px dashed var(--accent-brown);
            margin: 1.5rem 0;
        }
        .tip {
            background-color: rgba(74, 144, 226, 0.1);
            padding: 1rem;
            border-radius: 8px;
            border-left: 4px solid var(--accent-blue);
            margin: 1.5rem 0;
        }
        em {
            color: #ffcc66;
            font-style: italic;
        }
        strong {
            color: #ff9966;
            font-weight: 700;
        }
        .article-img {
            margin: 2rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.5);
            max-width: 800px;
        }
        .article-img figcaption {
            text-align: center;
            font-style: italic;
            padding: 0.8rem;
            background-color: #333;
            color: #aaa;
            font-size: 0.9rem;
        }
        .link-list {
            background-color: #2a2a2a;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .link-list h3 {
            margin-top: 0;
        }
        .link-list ul {
            list-style-type: square;
            padding-left: 1.5rem;
            columns: 2;
        }
        .link-list li {
            margin-bottom: 0.7rem;
            break-inside: avoid;
        }
        .interactive-module {
            background-color: #252525;
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
            border: 1px solid var(--border-color);
        }
        .module-title {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 1.5rem;
        }
        .module-title i {
            color: var(--accent-blue);
            font-size: 1.8rem;
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
        }
        .rating-stars i {
            color: #ffcc00;
            font-size: 1.5rem;
            cursor: pointer;
            transition: transform 0.2s;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            background-color: #333;
            border: 1px solid #555;
            border-radius: 5px;
            color: #fff;
            font-size: 1rem;
        }
        .form-control:focus {
            outline: 2px solid var(--accent-blue);
            border-color: transparent;
        }
        .btn {
            background-color: var(--primary-green);
            color: white;
            border: none;
            padding: 0.8rem 1.8rem;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
            font-size: 1rem;
            transition: background 0.3s, transform 0.2s;
        }
        .btn:hover {
            background-color: var(--secondary-green);
            transform: translateY(-2px);
        }
        .btn-block {
            width: 100%;
        }
        .sidebar-widget {
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        .sidebar-widget:last-child {
            border-bottom: none;
        }
        .widget-title {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: var(--accent-brown);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .update-time {
            background-color: rgba(59, 133, 38, 0.2);
            padding: 1rem;
            border-radius: 8px;
            text-align: center;
            font-size: 0.9rem;
            color: #aaa;
        }
        .update-time strong {
            color: var(--secondary-green);
            display: block;
            font-size: 1.1rem;
            margin-top: 5px;
        }
        .site-footer {
            background-color: var(--darker-bg);
            padding: 3rem 0 1.5rem;
            border-top: 3px solid var(--primary-green);
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-green);
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            font-size: 1.2rem;
            margin-bottom: 1rem;
            color: #ccc;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .friend-links {
            grid-column: span 4;
            background-color: #222;
            padding: 1.5rem;
            border-radius: 8px;
            margin-top: 1rem;
        }
        .friend-links h4 {
            color: #ccc;
            margin-bottom: 1rem;
        }
        friend-link {
            display: inline-block;
            margin-right: 1.5rem;
            margin-bottom: 0.8rem;
            padding: 0.4rem 0.8rem;
            background-color: #333;
            border-radius: 4px;
            transition: background 0.3s;
        }
        friend-link:hover {
            background-color: #444;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            color: #888;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
            .friend-links {
                grid-column: span 2;
            }
        }
        @media (max-width: 768px) {
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--darker-bg);
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.5);
                z-index: 999;
            }
            .main-nav.active ul {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            h1 {
                font-size: 2.3rem;
            }
            h2 {
                font-size: 1.9rem;
            }
            main {
                padding: 1.5rem;
            }
            .link-list ul {
                columns: 1;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
            .friend-links {
                grid-column: span 1;
            }
        }