:root {
            --primary: #6a5acd;
            --primary-dark: #4b3d8c;
            --secondary: #ffcc00;
            --accent: #e74c3c;
            --light: #f8f9fa;
            --dark: #2c3e50;
            --gray: #7f8c8d;
            --light-gray: #ecf0f1;
            --border-radius: 12px;
            --shadow: 0 6px 15px rgba(0,0,0,0.08);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #fff;
            color: var(--dark);
            line-height: 1.75;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark) 0%, #1a1a2e 100%);
            color: white;
            padding: 1.2rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.4rem;
            font-weight: 900;
            background: linear-gradient(90deg, var(--secondary), #ff9966);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -1px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
        }
        .my-logo:hover {
            transform: scale(1.03);
        }
        .breadcrumb {
            background-color: var(--light-gray);
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb i {
            margin: 0 8px;
            color: #bbb;
        }
        .main-nav ul {
            display: flex;
            gap: 2rem;
            list-style: none;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--secondary);
            transition: var(--transition);
        }
        .main-nav a:hover:after,
        .main-nav a.active:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .search-container {
            background: white;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: 2.5rem auto;
            max-width: 700px;
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: 2px solid var(--light-gray);
            border-radius: 50px;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(106, 90, 205, 0.2);
        }
        .search-btn {
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 50px;
            padding: 0 2rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }
        main {
            padding: 2rem 0 4rem;
        }
        article {
            background: white;
            border-radius: var(--border-radius);
            padding: 3rem;
            box-shadow: var(--shadow);
            margin-bottom: 3rem;
        }
        h1 {
            font-size: 3.2rem;
            color: var(--dark);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid var(--accent);
            padding-left: 1.5rem;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--primary-dark);
            margin: 3rem 0 1.5rem;
            padding-bottom: 0.7rem;
            border-bottom: 3px solid var(--light-gray);
        }
        h3 {
            font-size: 1.7rem;
            color: var(--dark);
            margin: 2.5rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--gray);
            margin: 2rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.8rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.4rem;
            font-weight: 500;
            color: var(--primary-dark);
            background: var(--light-gray);
            padding: 1.8rem;
            border-radius: var(--border-radius);
            margin-bottom: 2.5rem;
            border-left: 5px solid var(--primary);
        }
        .highlight {
            background: linear-gradient(120deg, rgba(255,204,0,0.15) 0%, rgba(255,204,0,0) 100%);
            padding: 2rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            border: 1px dashed var(--secondary);
        }
        .emoji {
            font-size: 1.3em;
            margin-right: 5px;
        }
        b, strong {
            color: var(--primary-dark);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--gray);
            font-size: 0.95rem;
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--light-gray);
        }
        .update-time {
            background: var(--light-gray);
            padding: 0.5rem 1rem;
            border-radius: 50px;
        }
        .featured-image {
            margin: 3rem auto;
            text-align: center;
        }
        .image-caption {
            font-style: italic;
            color: var(--gray);
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .link-block {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
            margin: 3rem 0;
        }
        .link-card {
            background: var(--light);
            border-radius: var(--border-radius);
            padding: 1.8rem;
            transition: var(--transition);
            border: 1px solid #e0e0e0;
        }
        .link-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow);
            border-color: var(--primary);
        }
        .link-card h4 {
            margin-top: 0;
            color: var(--primary);
        }
        .interactive-section {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-radius: var(--border-radius);
            padding: 2.5rem;
            margin: 3rem 0;
            border: 1px solid #dee2e6;
        }
        .rating-container, .comment-container {
            margin-top: 2rem;
        }
        .star-rating {
            direction: rtl;
            display: inline-block;
            font-size: 2rem;
            unicode-bidi: bidi-override;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: var(--secondary);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-control {
            width: 100%;
            padding: 1rem;
            border: 2px solid var(--light-gray);
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(106, 90, 205, 0.2);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .submit-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(106, 90, 205, 0.3);
        }
        footer {
            background: var(--dark);
            color: white;
            padding: 4rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            color: var(--secondary);
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary);
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #bbb;
        }
        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: var(--border-radius);
            margin-bottom: 1rem;
            border-left: 4px solid var(--secondary);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.7rem; }
            h2 { font-size: 2rem; }
            .main-nav ul { gap: 1.5rem; }
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            .main-nav.active {
                max-height: 400px;
                margin-top: 1.5rem;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 1rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-btn {
                padding: 1rem;
            }
            article {
                padding: 2rem;
            }
            .link-block {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .container { padding: 0 15px; }
            .interactive-section { padding: 1.8rem; }
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeInUp 0.8s ease forwards;
        }