* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #2a6df5;
            --primary-dark: #1a56d4;
            --secondary: #ff6b35;
            --dark: #1a1a2e;
            --light: #f8f9fa;
            --gray: #6c757d;
            --success: #28a745;
            --border: #e1e5eb;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f5f7fb;
            color: #333;
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: #fff;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        .main-nav {
            display: flex;
            align-items: center;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .nav-list a {
            font-weight: 600;
            color: var(--dark);
            padding: 8px 5px;
            border-bottom: 3px solid transparent;
        }
        .nav-list a:hover, .nav-list a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            color: var(--dark);
            cursor: pointer;
            background: none;
            border: none;
        }
        .breadcrumb {
            background-color: #fff;
            padding: 15px 0;
            border-bottom: 1px solid var(--border);
            margin-bottom: 30px;
        }
        .breadcrumb-list {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--gray);
            font-size: 0.9rem;
        }
        .breadcrumb-list li:not(:last-child)::after {
            content: '>';
            opacity: 0.6;
        }
        .breadcrumb-list a {
            color: var(--gray);
        }
        .breadcrumb-list a:hover {
            color: var(--primary);
        }
        .main-content {
            flex: 1;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 30px 0;
        }
        .article-container {
            background-color: #fff;
            border-radius: 12px;
            padding: 40px;
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 40px;
            border-bottom: 2px solid var(--border);
            padding-bottom: 25px;
        }
        .article-title {
            font-size: 2.8rem;
            color: var(--dark);
            margin-bottom: 15px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--gray);
            font-size: 0.95rem;
            flex-wrap: wrap;
            gap: 15px;
        }
        .last-updated {
            background-color: #f0f7ff;
            padding: 8px 15px;
            border-radius: 50px;
            font-weight: 600;
        }
        .article-meta i {
            margin-right: 8px;
            color: var(--primary);
        }
        h1, h2, h3, h4 {
            color: var(--dark);
            margin-top: 2.5rem;
            margin-bottom: 1.2rem;
            line-height: 1.3;
        }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; border-left: 5px solid var(--primary); padding-left: 20px; }
        h3 { font-size: 1.8rem; }
        h4 { font-size: 1.4rem; color: var(--gray); }
        .article-content p {
            margin-bottom: 1.8rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .article-content p.lead {
            font-size: 1.3rem;
            color: var(--primary-dark);
            font-weight: 500;
            background: #f0f7ff;
            padding: 25px;
            border-radius: 10px;
            border-left: 5px solid var(--secondary);
        }
        .highlight {
            background-color: #fff9e6;
            padding: 25px;
            border-radius: 10px;
            border: 1px dashed #ffc107;
            margin: 30px 0;
        }
        .highlight strong {
            color: #d39e00;
            font-size: 1.1rem;
        }
        .feature-img {
            margin: 40px auto;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            max-width: 900px;
        }
        .feature-img figcaption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            padding: 15px;
            font-size: 0.95rem;
            background-color: #f8f9fa;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .link-group {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin: 30px 0;
        }
        .internal-link {
            background-color: #f8f9fa;
            border: 1px solid var(--border);
            padding: 12px 20px;
            border-radius: 8px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .internal-link:hover {
            background-color: var(--primary);
            color: white;
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .internal-link i {
            font-size: 1.1rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background-color: #fff;
            border-radius: 12px;
            padding: 25px;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.4rem;
            color: var(--dark);
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 2px solid var(--border);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .widget-title i {
            color: var(--primary);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 14px 18px;
            border: 2px solid var(--border);
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }
        .search-form input:focus {
            border-color: var(--primary);
        }
        .search-form button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .search-form button:hover {
            background-color: var(--primary-dark);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin: 20px 0;
            font-size: 2rem;
            color: #ffc107;
        }
        .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover {
            transform: scale(1.2);
        }
        .rating-form button {
            background-color: var(--success);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            width: 100%;
            transition: var(--transition);
            margin-top: 15px;
        }
        .rating-form button:hover {
            background-color: #218838;
        }
        .comment-form textarea {
            width: 100%;
            padding: 18px;
            border: 2px solid var(--border);
            border-radius: 8px;
            resize: vertical;
            min-height: 150px;
            font-size: 1rem;
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .comment-form textarea:focus {
            border-color: var(--primary);
            outline: none;
        }
        .comment-form button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 14px 30px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            width: 100%;
            transition: var(--transition);
        }
        .comment-form button:hover {
            background-color: var(--primary-dark);
        }
        .site-footer {
            background-color: var(--dark);
            color: #ccc;
            padding: 50px 0 30px;
            margin-top: 60px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
        }
        .footer-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            margin-bottom: 20px;
            display: block;
        }
        .footer-title {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 25px;
            padding-bottom: 10px;
            border-bottom: 2px solid rgba(255,255,255,0.1);
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 12px 15px;
            margin-bottom: 10px;
            border-radius: 6px;
            transition: var(--transition);
        }
        friend-link:hover {
            background-color: rgba(255,255,255,0.1);
            transform: translateX(5px);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #999;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .article-title {
                font-size: 2.4rem;
            }
            h2 { font-size: 2rem; }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: relative;
            }
            .nav-list {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: white;
                flex-direction: column;
                align-items: center;
                padding: 20px 0;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                transform: translateY(-150%);
                opacity: 0;
                transition: transform 0.4s ease, opacity 0.3s ease;
                z-index: 999;
                gap: 0;
            }
            .nav-list.active {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-list li {
                width: 100%;
                text-align: center;
            }
            .nav-list a {
                display: block;
                padding: 18px 20px;
                border-bottom: 1px solid #f0f0f0;
                border-bottom-color: transparent;
            }
            .nav-list a:hover {
                background-color: #f8f9fa;
                border-bottom-color: transparent;
            }
            .header-container {
                padding: 15px 0;
            }
            .article-container {
                padding: 25px;
            }
            .article-title {
                font-size: 2rem;
            }
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }
        @media (max-width: 576px) {
            .container {
                padding: 0 15px;
            }
            .article-title {
                font-size: 1.8rem;
            }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.5rem; }
            .article-content p {
                font-size: 1.05rem;
            }
            .link-group {
                flex-direction: column;
            }
        }
        @media print {
            .site-header, .sidebar, .site-footer, .breadcrumb, .hamburger {
                display: none;
            }
            .main-content {
                grid-template-columns: 1fr;
                padding: 0;
            }
            .article-container {
                box-shadow: none;
                padding: 0;
            }
        }