:root {
            --primary-color: #6C5CE7;
            --secondary-color: #FF6B6B;
            --accent-color: #00D2D3;
            --dark-color: #0F172A;
            --light-color: #F8FAFC;
            --gray-color: #64748B;
            --success-color: #10B981;
            --gradient-bg: linear-gradient(135deg, #6C5CE7, #FF6B6B, #00D2D3);
            --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            --transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
            --card-hover: translateY(-8px);
            --glass-bg: rgba(255, 255, 255, 0.9);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: #f5f7ff;
            color: #333;
            line-height: 1.6;
            padding-top: 80px;
        }

        /* Top Navigation */
        .top-nav {
            background: white;
            box-shadow: var(--shadow);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 80px;
            display: flex;
            align-items: center;
        }

        .nav-container {
            max-width: 1400px;
            width: 100%;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo h1 {
            font-size: 28px;
            background: var(--gradient-bg);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            font-weight: 800;
        }

        .logo span {
            color: var(--accent-color);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .nav-menu ul {
            display: flex;
            list-style: none;
            gap: 5px;
        }

        .nav-menu a {
            display: flex;
            align-items: center;
            padding: 15px 20px;
            color: #333;
            text-decoration: none;
            transition: var(--transition);
            border-radius: 5px;
            font-weight: 500;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            background: rgba(67, 97, 238, 0.1);
            color: var(--primary-color);
        }

        .search-container {
            position: relative;
        }

        .search-box {
            padding: 10px 20px;
            padding-right: 50px;
            border: 2px solid #e0e0e0;
            border-radius: 50px;
            font-size: 14px;
            width: 250px;
            transition: var(--transition);
            background: white;
        }

        .search-box:focus {
            outline: none;
            border-color: var(--primary-color);
            width: 300px;
        }

        .search-button {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--gray-color);
            cursor: pointer;
            font-size: 16px;
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--dark-color);
            cursor: pointer;
            padding: 10px;
            border-radius: 5px;
        }

        /* Main Content */
        .main-content {
            max-width: 1400px;
            margin: 0 auto;
            padding: 2rem;
        }

        /* SEO Hero Section */
        .seo-hero {
            background: linear-gradient(135deg, #1a2a6c, #b21f1f, #fdbb2d);
            border-radius: 32px;
            padding: 2rem 2.5rem;
            color: white;
            margin-bottom: 2.5rem;
            position: relative;
            overflow: hidden;
            display: grid;
            grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
            align-items: center;
            gap: 2rem;
        }

        .seo-hero::before {
            content: "🔍";
            position: absolute;
            right: 20px;
            bottom: 20px;
            font-size: 120px;
            opacity: 0.1;
        }

        .seo-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
        }

        .seo-hero p {
            font-size: 1.05rem;
            max-width: 520px;
            margin-bottom: 0;
            opacity: 0.95;
        }

        .seo-hero-actions {
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 1rem;
        }

        .seo-stats {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            justify-content: flex-end;
        }

        .seo-stat-item {
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(5px);
            padding: 0.8rem 1.1rem;
            border-radius: 16px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .seo-stat-number {
            font-size: 1.8rem;
            font-weight: 700;
            display: block;
        }

        .seo-stat-label {
            font-size: 0.9rem;
            opacity: 0.9;
        }

        .seo-hero-button {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: white;
            color: var(--dark-color);
            padding: 0.75rem 1.4rem;
            border-radius: 999px;
            font-weight: 600;
            text-decoration: none;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .seo-hero-button:hover {
            transform: translateY(-1px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.12);
        }

        /* SEO Search Bar */
        .seo-search-section {
            margin-bottom: 3rem;
        }

        .seo-search-container {
            background: white;
            border-radius: 60px;
            padding: 0.5rem;
            display: flex;
            align-items: center;
            box-shadow: var(--shadow);
            border: 2px solid transparent;
            transition: var(--transition);
        }

        .seo-search-container:focus-within {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.15);
        }

        .seo-search-icon {
            padding: 0 1rem 0 1.5rem;
            color: var(--gray-color);
        }

        #seoSearchInput {
            flex: 1;
            padding: 1.2rem 0;
            border: none;
            font-size: 1.1rem;
            outline: none;
            background: transparent;
        }

        #seoSearchBtn {
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        #seoSearchBtn:hover {
            background: var(--secondary-color);
            transform: scale(1.02);
        }

        .seo-categories {
            display: flex;
            gap: 0.8rem;
            margin-top: 1.5rem;
            flex-wrap: wrap;
        }

        .seo-category-tag {
            padding: 0.6rem 1.2rem;
            background: white;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--dark-color);
            border: 1px solid #e2e8f0;
            cursor: pointer;
            transition: var(--transition);
        }

        .seo-category-tag:hover,
        .seo-category-tag.active {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        /* Tools Grid */
        .tools-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 1.8rem;
            margin: 2rem 0 4rem;
        }

        .tool-card {
            background: white;
            border-radius: 20px;
            padding: 1.8rem;
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.05);
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }

        .tool-card:hover {
            transform: var(--card-hover);
            box-shadow: var(--shadow);
            border-color: var(--primary-color);
        }

        .tool-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(108, 92, 231, 0.05));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.2rem;
        }

        .tool-icon i {
            font-size: 1.8rem;
            color: var(--primary-color);
        }

        .tool-card h3 {
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
            color: var(--dark-color);
        }

        .tool-card p {
            color: var(--gray-color);
            font-size: 0.95rem;
            margin-bottom: 1.2rem;
            line-height: 1.6;
        }

        .tool-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .tool-tag {
            background: #f1f5f9;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--gray-color);
            letter-spacing: 0.3px;
        }

        .popularity-badge {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: var(--accent-color);
            color: white;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            font-size: 0.7rem;
            font-weight: 600;
        }

        /* Blog Section */
        .seo-blog-section {
            background: white;
            border-radius: 32px;
            padding: 3rem;
            margin: 4rem 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
        }

        .blog-header {
            text-align: center;
            margin-bottom: 3rem;
        }

        .blog-header h2 {
            font-size: 2.5rem;
            color: var(--dark-color);
            margin-bottom: 1rem;
        }

        .blog-header p {
            color: var(--gray-color);
            max-width: 700px;
            margin: 0 auto;
            font-size: 1.1rem;
        }

        .blog-content {
            max-width: 1000px;
            margin: 0 auto;
        }

        .blog-section {
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid #f1f5f9;
        }

        .blog-section h3 {
            font-size: 1.6rem;
            color: var(--dark-color);
            margin-bottom: 1.2rem;
            font-weight: 700;
        }

        .blog-section h4 {
            font-size: 1.2rem;
            color: var(--primary-color);
            margin: 1.5rem 0 1rem;
        }

        .blog-section p {
            color: #334155;
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            line-height: 1.8;
        }

        .blog-section ul,
        .blog-section ol {
            margin: 1.2rem 0 1.5rem 1.8rem;
        }

        .blog-section li {
            margin-bottom: 0.6rem;
            color: #334155;
            font-size: 1.05rem;
        }

        .tip-box {
            background: linear-gradient(135deg, #f8fafc, #f1f5f9);
            border-left: 4px solid var(--accent-color);
            padding: 1.8rem;
            border-radius: 12px;
            margin: 2rem 0;
        }

        .tip-box strong {
            color: var(--primary-color);
        }

        .table-of-contents {
            background: #f8fafc;
            padding: 2rem;
            border-radius: 16px;
            margin-bottom: 2.5rem;
        }

        .table-of-contents h4 {
            color: var(--dark-color);
            margin-bottom: 1rem;
        }

        .table-of-contents ul {
            columns: 2;
            list-style: none;
            margin-left: 0;
        }

        .table-of-contents li {
            margin-bottom: 0.5rem;
        }

        .table-of-contents a {
            text-decoration: none;
            color: var(--primary-color);
            font-weight: 500;
        }

        /* FAQ Section */
        .faq-section {
            margin-top: 3rem;
        }

        .faq-item {
            background: #f8fafc;
            border-radius: 12px;
            padding: 1.5rem;
            margin-bottom: 1rem;
        }

        .faq-question {
            font-weight: 700;
            color: var(--dark-color);
            margin-bottom: 0.8rem;
            font-size: 1.1rem;
        }

        .faq-answer {
            color: var(--gray-color);
        }

        /* Footer */
        .footer {
            background: var(--dark-color);
            color: white;
            margin-top: 4rem;
            border-radius: 32px 32px 0 0;
            padding: 3rem 2rem 1.5rem;
        }

        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }

        .footer-section h3 {
            margin-bottom: 1rem;
            font-size: 1.2rem;
        }

        .footer-section p {
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 1rem;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 0.5rem;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }

        .social-icons {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }

        .social-icons a {
            color: white;
            background: rgba(255, 255, 255, 0.1);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .social-icons a:hover {
            background: var(--primary-color);
            transform: translateY(-3px);
        }

        .newsletter-form {
            display: flex;
            margin-top: 1rem;
        }

        .newsletter-form input {
            flex: 1;
            padding: 0.8rem;
            border: none;
            border-radius: 8px 0 0 8px;
            font-size: 0.9rem;
        }

        .newsletter-form button {
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.2rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            transition: var(--transition);
        }

        .newsletter-form button:hover {
            background: var(--secondary-color);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.7);
        }

        @media (max-width: 992px) {
            .mobile-menu-toggle {
                display: block;
            }

            .nav-menu {
                position: fixed;
                top: 80px;
                left: 0;
                right: 0;
                background: white;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                z-index: 999;
                height: auto;
                max-height: calc(100vh - 80px);
                overflow-y: auto;
            }

            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .nav-menu ul {
                flex-direction: column;
                width: 100%;
                gap: 5px;
            }

            .nav-menu li {
                width: 100%;
            }

            .nav-menu a {
                padding: 15px;
                width: 100%;
                border-radius: 5px;
                justify-content: flex-start;
                font-size: 16px;
            }

            .nav-actions {
                margin-left: 0;
                margin-top: 15px;
                width: 100%;
            }

            .search-container {
                width: 100%;
            }

            .search-box {
                width: 100%;
            }

            .search-box:focus {
                width: 100%;
            }

            .seo-hero {
                grid-template-columns: 1fr;
            }

            .seo-hero-actions {
                align-items: flex-start;
            }

            .seo-hero-button {
                align-self: flex-start;
            }

            .seo-stats {
                justify-content: flex-start;
            }

            .seo-hero h1 {
                font-size: 2rem;
            }

            .table-of-contents ul {
                columns: 1;
            }
        }

        @media (max-width: 768px) {
            body {
                padding-top: 70px;
            }

            .top-nav {
                height: 70px;
            }

            .nav-menu {
                top: 70px;
                max-height: calc(100vh - 70px);
            }

            .seo-hero {
                padding: 1.6rem;
            }

            .seo-hero::before {
                font-size: 90px;
            }

            .seo-hero p {
                font-size: 1rem;
            }

            .seo-hero-actions {
                width: 100%;
            }

            .seo-hero-button {
                width: 100%;
                justify-content: center;
            }

            .seo-stats {
                width: 100%;
                justify-content: center;
            }

            .seo-stat-item {
                flex: 1 1 30%;
                text-align: center;
            }

            .seo-search-container {
                flex-direction: column;
                border-radius: 24px;
            }

            .seo-search-icon {
                padding: 0.6rem 1rem 0.2rem;
            }

            #seoSearchInput {
                width: 100%;
                padding: 0.9rem 0.2rem;
                text-align: center;
            }

            #seoSearchBtn {
                width: 100%;
                justify-content: center;
            }

            .tools-grid {
                grid-template-columns: 1fr;
            }

            .seo-blog-section {
                padding: 1.5rem;
            }
        }

        @media (max-width: 576px) {
            .nav-container {
                padding: 0 15px;
            }

            .logo h1 {
                font-size: 22px;
            }

            .seo-hero {
                padding: 1.3rem;
                border-radius: 24px;
            }

            .seo-hero h1 {
                font-size: 1.6rem;
            }

            .seo-stats {
                gap: 0.6rem;
            }

            .seo-stat-item {
                padding: 0.6rem 0.7rem;
            }

            .seo-stat-number {
                font-size: 1.4rem;
            }

            .seo-search-container {
                padding: 0.4rem;
            }

            #seoSearchBtn {
                padding: 0.9rem 1.2rem;
            }

            .blog-header h2 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 400px) {
            body {
                padding-top: 64px;
            }

            .top-nav {
                height: 64px;
            }

            .nav-menu {
                top: 64px;
                max-height: calc(100vh - 64px);
            }

            .logo h1 {
                font-size: 20px;
            }

            .seo-hero {
                padding: 1.1rem;
                border-radius: 20px;
                gap: 1rem;
            }

            .seo-hero h1 {
                font-size: 1.45rem;
            }

            .seo-hero p {
                font-size: 0.95rem;
            }

            .seo-hero::before {
                font-size: 70px;
            }

            .seo-stats {
                gap: 0.5rem;
            }

            .seo-stat-item {
                flex: 1 1 100%;
                padding: 0.5rem 0.6rem;
            }

            .seo-stat-number {
                font-size: 1.2rem;
            }

            .seo-hero-button {
                font-size: 0.9rem;
                padding: 0.65rem 1rem;
            }

            .seo-search-container {
                padding: 0.35rem;
            }

            #seoSearchInput {
                font-size: 0.95rem;
            }

            #seoSearchBtn {
                font-size: 0.95rem;
                padding: 0.8rem 1rem;
            }

            .seo-category-tag {
                padding: 0.5rem 0.9rem;
                font-size: 0.85rem;
            }

            .tool-card {
                padding: 1.2rem;
            }

            .blog-header h2 {
                font-size: 1.5rem;
            }

            .table-of-contents {
                padding: 1.3rem;
            }
        }