:root {
            --primary: #1a73e8;
            --secondary: #34a853;
            --accent: #fbbc05;
            --dark: #202124;
            --light: #f8f9fa;
            --gray: #5f6368;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --radius: 12px;
            --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: #f5f7fa;
            color: var(--dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--dark), #3c4043);
            color: white;
            padding: 1.2rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(to right, var(--accent), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            font-size: 2.5rem;
            color: var(--accent);
        }
        .my-logo:hover {
            transform: scale(1.03);
            transition: var(--transition);
        }
        nav {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        .nav-links {
            display: flex;
            gap: 1.8rem;
            list-style: none;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0.8rem;
            border-radius: 6px;
            transition: var(--transition);
        }
        .nav-links a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--accent);
        }
        .search-box {
            display: flex;
            background: white;
            border-radius: 50px;
            overflow: hidden;
            padding: 0.3rem;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }
        .search-box input {
            border: none;
            padding: 0.6rem 1rem;
            width: 220px;
            outline: none;
            font-size: 1rem;
        }
        .search-box button {
            background: var(--primary);
            border: none;
            color: white;
            padding: 0.6rem 1.2rem;
            border-radius: 50px;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: #0d62d9;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e8f0fe;
            border-radius: 0 0 var(--radius) var(--radius);
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.7rem;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 0.7rem;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            font-size: 1.2rem;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem 0;
        }
        .article-content {
            background: white;
            border-radius: var(--radius);
            padding: 2.5rem;
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--dark);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid var(--accent);
            padding-bottom: 0.8rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.8rem;
            border-left: 5px solid var(--secondary);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--secondary);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--gray);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background: linear-gradient(120deg, #e3f2fd 0%, #f3e5f5 100%);
            padding: 2rem;
            border-radius: var(--radius);
            border-left: 6px solid var(--primary);
            margin: 2rem 0;
        }
        .highlight p {
            margin-bottom: 1rem;
            font-size: 1.15rem;
        }
        emoji {
            font-size: 1.4em;
            margin-right: 0.4rem;
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--radius);
            margin: 2rem 0;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            transition: var(--transition);
        }
        .featured-image:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.2);
        }
        .internal-links {
            background: #f1f8e9;
            padding: 1.5rem;
            border-radius: var(--radius);
            margin: 2rem 0;
        }
        .internal-links ul {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1rem;
            list-style: none;
        }
        .internal-links a {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 600;
            padding: 0.6rem 1rem;
            display: block;
            border-radius: 8px;
            background: white;
            transition: var(--transition);
        }
        .internal-links a:hover {
            background: var(--secondary);
            color: white;
            transform: translateX(8px);
        }
        sidebar {
            background: white;
            border-radius: var(--radius);
            padding: 2rem;
            box-shadow: var(--shadow);
            height: fit-content;
            position: sticky;
            top: 120px;
        }
        .rating-widget, .comment-widget {
            margin-bottom: 2.5rem;
        }
        .rating-widget h3, .comment-widget h3 {
            color: var(--primary);
            margin-bottom: 1.2rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
            justify-content: center;
        }
        .stars i {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .stars i:hover, .stars i.active {
            color: var(--accent);
        }
        .rating-form button, .comment-form button {
            width: 100%;
            padding: 0.9rem;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            color: white;
            border: none;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-form button:hover, .comment-form button:hover {
            transform: scale(1.03);
            box-shadow: 0 6px 15px rgba(52, 168, 83, 0.3);
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid #e0e0e0;
            border-radius: var(--radius);
            resize: vertical;
            min-height: 150px;
            margin-bottom: 1rem;
            font-size: 1rem;
        }
        .update-time {
            background: #fff3cd;
            padding: 1rem;
            border-radius: var(--radius);
            border: 1px solid #ffecb5;
            text-align: center;
            margin-top: 2rem;
            font-weight: 600;
            color: #856404;
        }
        footer {
            background: var(--dark);
            color: white;
            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 h4 {
            color: var(--accent);
            border-bottom: 2px solid var(--primary);
            padding-bottom: 0.7rem;
            margin-bottom: 1.5rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
        }
        friend-link a {
            color: #b3e5fc;
            text-decoration: none;
            transition: var(--transition);
        }
        friend-link a:hover {
            color: white;
            padding-left: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            sidebar {
                position: static;
            }
            h1 {
                font-size: 2.4rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 768px) {
            .nav-links, .search-box {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .header-content {
                position: relative;
            }
            .mobile-nav {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--dark);
                padding: 1.5rem;
                box-shadow: 0 10px 20px rgba(0,0,0,0.2);
                border-radius: 0 0 var(--radius) var(--radius);
                gap: 1rem;
            }
            .mobile-nav.active {
                display: flex;
            }
            .mobile-nav a {
                color: white;
                text-decoration: none;
                padding: 0.8rem;
                border-radius: 6px;
            }
            .mobile-nav a:hover {
                background: rgba(255,255,255,0.1);
            }
            .mobile-search {
                display: flex;
                margin-top: 1rem;
            }
            .internal-links ul {
                grid-template-columns: 1fr;
            }
        }