:root {
            --primary: #1a5fb4;
            --secondary: #26a269;
            --accent: #c64600;
            --dark: #1e1e1e;
            --light: #f6f5f4;
            --gray: #deddda;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #fafafa;
            color: #333;
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--dark) 0%, #2d2d2d 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(to right, #4cc9f0, #4361ee);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li {
            margin-left: 1.8rem;
        }
        .nav-links a {
            color: white;
            font-weight: 500;
            position: relative;
            padding-bottom: 5px;
        }
        .nav-links a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
        }
        .nav-links a:hover:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 0.8rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid var(--gray);
        }
        .breadcrumb a {
            color: #666;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            color: #999;
            margin: 0 8px;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem 0;
        }
        @media (max-width: 768px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        .content-area {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .widget {
            margin-bottom: 2rem;
        }
        .widget-title {
            font-size: 1.2rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary);
            color: var(--dark);
        }
        .search-box {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-box input {
            flex: 1;
            padding: 0.8rem;
            border: 1px solid var(--gray);
            border-right: none;
            border-radius: 6px 0 0 6px;
            outline: none;
        }
        .search-box button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 1.2rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: var(--accent);
        }
        .comment-section, .rating-section {
            background: #f9f9f9;
            padding: 1.5rem;
            border-radius: 8px;
            margin-top: 2rem;
        }
        .rating-stars {
            color: gold;
            font-size: 1.5rem;
            margin: 0.5rem 0;
            cursor: pointer;
        }
        .rating-stars .star {
            margin-right: 5px;
            transition: var(--transition);
        }
        .rating-stars .star:hover {
            transform: scale(1.2);
        }
        textarea, input[type="text"], input[type="email"] {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1rem;
            border: 1px solid var(--gray);
            border-radius: 6px;
            font-size: 1rem;
        }
        .submit-btn {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background: #1e8b4f;
        }
        h1 {
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 1.8rem;
            color: var(--primary);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--gray);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--secondary);
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            font-size: 1.1rem;
            color: #555;
            margin: 1.2rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.1rem;
            background: #f0f7ff;
            padding: 1.5rem;
            border-left: 4px solid var(--primary);
            border-radius: 0 8px 8px 0;
            margin-bottom: 2rem;
        }
        .highlight {
            background: #fff9e6;
            padding: 1.5rem;
            border-radius: 8px;
            border: 1px dashed #f0c420;
            margin: 1.5rem 0;
        }
        .highlight strong {
            color: var(--accent);
        }
        .article-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            margin: 1.5rem auto;
            display: block;
            box-shadow: var(--shadow);
        }
        .update-time {
            font-style: italic;
            color: #777;
            text-align: right;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px dashed #ccc;
        }
        .content-links {
            display: inline;
            font-weight: 600;
            border-bottom: 1px dotted var(--primary);
        }
        friend-link {
            display: block;
            background: #f1f8ff;
            padding: 0.8rem 1rem;
            margin-bottom: 0.5rem;
            border-radius: 6px;
            border-left: 3px solid var(--primary);
            transition: var(--transition);
        }
        friend-link:hover {
            background: #e1f0ff;
            transform: translateX(5px);
        }
        footer {
            background: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
            margin-bottom: 1.5rem;
            padding-right: 1.5rem;
        }
        .footer-title {
            font-size: 1.2rem;
            margin-bottom: 1rem;
            color: #4cc9f0;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            margin-top: 1.5rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.6rem; }
            .content-area { padding: 2rem; }
        }
        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 70px;
                right: -100%;
                flex-direction: column;
                background: var(--dark);
                width: 100%;
                text-align: center;
                transition: 0.5s;
                padding: 2rem 0;
                box-shadow: var(--shadow);
            }
            .nav-links.active {
                right: 0;
            }
            .nav-links li {
                margin: 1rem 0;
            }
            .hamburger {
                display: block;
            }
            .header-container {
                padding: 0 15px;
            }
            .content-area, .sidebar {
                padding: 1.5rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .content-area, .sidebar {
            animation: fadeIn 0.8s ease-out;
        }