* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #4a6fa5;
            --secondary: #ff8c42;
            --accent: #6b8e23;
            --dark: #2c3e50;
            --light: #f8f9fa;
            --gray: #6c757d;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        body {
            background-color: #fefefe;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            background: var(--secondary);
            color: white;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn:hover {
            background: #e67e22;
            transform: translateY(-3px);
            box-shadow: 0 7px 12px rgba(255, 140, 66, 0.25);
        }
        .section-title {
            font-size: 2.2rem;
            color: var(--dark);
            margin-bottom: 2rem;
            position: relative;
            padding-bottom: 10px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--secondary);
            border-radius: 2px;
        }
        .text-center { text-align: center; }
        .text-center .section-title::after { left: 50%; transform: translateX(-50%); }
        header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i { color: var(--secondary); }
        .logo span { color: var(--dark); }
        .nav-desktop ul {
            display: flex;
            gap: 2rem;
        }
        .nav-desktop a {
            font-weight: 600;
            color: var(--dark);
            padding: 8px 0;
            position: relative;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--accent);
            transition: width 0.3s;
        }
        .nav-desktop a:hover::after,
        .nav-desktop a.active::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            color: var(--dark);
            cursor: pointer;
            background: none;
            border: none;
        }
        .nav-mobile {
            display: none;
            background: white;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            padding: 20px;
            flex-direction: column;
            gap: 1rem;
            transform: translateY(-10px);
            opacity: 0;
            transition: var(--transition);
        }
        .nav-mobile.active {
            display: flex;
            transform: translateY(0);
            opacity: 1;
        }
        .nav-mobile a {
            padding: 12px;
            border-bottom: 1px solid #eee;
            font-weight: 600;
        }
        .nav-mobile a:hover {
            background: #f9f9f9;
            padding-left: 20px;
        }
        .breadcrumb {
            background: #f1f8ff;
            padding: 12px 0;
            font-size: 0.9rem;
            margin-bottom: 30px;
        }
        .breadcrumb ul {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 10px;
            color: var(--gray);
        }
        .hero {
            background: linear-gradient(135deg, #e3f2fd 0%, #fce4ec 100%);
            padding: 60px 0;
            border-radius: 0 0 30px 30px;
            margin-bottom: 50px;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .hero-content h1 {
            font-size: 3.2rem;
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 20px;
        }
        .hero-content h1 span {
            color: var(--primary);
            text-decoration: underline;
            text-decoration-color: var(--secondary);
        }
        .hero-stats {
            display: flex;
            gap: 30px;
            margin: 25px 0;
        }
        .stat-box {
            text-align: center;
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            display: block;
        }
        .hero-image {
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow);
            position: relative;
        }
        .hero-image img {
            transition: transform 0.5s;
        }
        .hero-image:hover img {
            transform: scale(1.03);
        }
        .search-box {
            background: white;
            padding: 30px;
            border-radius: 15px;
            box-shadow: var(--shadow);
            margin: 40px 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 700px;
            margin: 20px auto 0;
        }
        .search-input {
            flex: 1;
            padding: 16px 20px;
            border: 2px solid #ddd;
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }
        .search-input:focus {
            border-color: var(--primary);
        }
        .search-btn {
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 0 50px 50px 0;
            padding: 0 30px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: #3a5a8a;
        }
        main {
            padding: 30px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        article {
            background: white;
            padding: 30px;
            border-radius: 15px;
            box-shadow: var(--shadow);
            margin-bottom: 30px;
        }
        article h2 {
            font-size: 1.8rem;
            margin: 1.5em 0 0.8em;
            color: var(--dark);
            border-left: 5px solid var(--accent);
            padding-left: 15px;
        }
        article h3 {
            font-size: 1.4rem;
            margin: 1.2em 0 0.6em;
            color: var(--primary);
        }
        article p {
            margin-bottom: 1.2em;
            font-size: 1.05rem;
            text-align: justify;
        }
        .highlight-box {
            background: #fff9e6;
            border-left: 5px solid #ffc107;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 10px 10px 0;
        }
        .highlight-box p {
            margin: 0;
            font-style: italic;
        }
        .image-float {
            float: right;
            margin: 15px 0 15px 25px;
            max-width: 300px;
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            box-shadow: 0 5px 10px rgba(0,0,0,0.05);
        }
        .data-table th, .data-table td {
            padding: 15px;
            text-align: left;
            border-bottom: 1px solid #eee;
        }
        .data-table th {
            background: var(--primary);
            color: white;
            font-weight: 600;
        }
        .data-table tr:hover {
            background: #f5f9ff;
        }
        aside {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .sidebar-widget {
            background: white;
            padding: 25px;
            border-radius: 15px;
            box-shadow: var(--shadow);
            margin-bottom: 25px;
        }
        .widget-title {
            font-size: 1.3rem;
            color: var(--dark);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #f0f0f0;
        }
        .popular-puzzles li {
            padding: 12px 0;
            border-bottom: 1px solid #f0f0f0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .popular-puzzles li:before {
            content: '🧩';
        }
        .rating-section, .comments-section {
            background: white;
            padding: 30px;
            border-radius: 15px;
            box-shadow: var(--shadow);
            margin-top: 40px;
        }
        .star-rating {
            display: flex;
            gap: 5px;
            margin: 15px 0;
        }
        .star-rating i {
            color: #ffd700;
            font-size: 1.8rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-top: 25px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-control {
            padding: 14px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
        }
        .comment-list {
            margin-top: 30px;
        }
        .comment-item {
            padding: 20px;
            border: 1px solid #eee;
            border-radius: 10px;
            margin-bottom: 20px;
            background: #fdfdfd;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: var(--gray);
        }
        .long-tail-links {
            background: linear-gradient(to right, var(--primary), #5a7bb5);
            padding: 40px 0;
            margin-top: 60px;
            border-radius: 20px 20px 0 0;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
        }
        .web-link {
            background: rgba(255,255,255,0.1);
            backdrop-filter: blur(10px);
            padding: 15px;
            border-radius: 10px;
            text-align: center;
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255,255,255,0.2);
            transform: translateY(-5px);
        }
        .web-link a {
            color: white;
            font-weight: 500;
            display: block;
        }
        footer {
            background: var(--dark);
            color: #ccc;
            padding: 50px 0 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            color: white;
            margin-bottom: 25px;
            font-size: 1.2rem;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--secondary);
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #999;
        }
        @media (max-width: 992px) {
            .hero-grid,
            .content-grid,
            .web-links-container,
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-content h1 { font-size: 2.6rem; }
        }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .hamburger { display: block; }
            .hero-grid {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .content-grid {
                grid-template-columns: 1fr;
            }
            .image-float {
                float: none;
                margin: 20px auto;
                max-width: 100%;
            }
            .web-links-container,
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .search-form {
                flex-direction: column;
                gap: 15px;
            }
            .search-input, .search-btn {
                border-radius: 50px;
                width: 100%;
            }
            .hero-stats {
                justify-content: center;
                flex-wrap: wrap;
            }
        }
        @media (max-width: 480px) {
            .section-title { font-size: 1.8rem; }
            .hero-content h1 { font-size: 2rem; }
            .stat-number { font-size: 1.8rem; }
            article, .sidebar-widget, .rating-section, .comments-section {
                padding: 20px;
            }
        }