:root {
            --primary-color: #e63946;
            --secondary-color: #1d3557;
            --accent-color: #f4a261;
            --light-bg: #f1faee;
            --dark-text: #2b2d42;
            --light-text: #f8f9fa;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --border-radius: 12px;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: var(--dark-text);
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(90deg, var(--secondary-color) 0%, #457b9d 100%);
            color: var(--light-text);
            padding: 1.2rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-family: 'Arial Black', Impact, sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            letter-spacing: -1px;
            background: linear-gradient(45deg, #f4a261, #e9c46a);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
        }
        .logo span {
            color: var(--primary-color);
            font-size: 2.5rem;
            vertical-align: sub;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 1rem;
            border-radius: 50px;
            position: relative;
        }
        .main-nav a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background: var(--accent-color);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 70%;
        }
        .burger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }
        .burger span {
            width: 25px;
            height: 3px;
            background-color: white;
            border-radius: 2px;
            transition: var(--transition);
        }
        .breadcrumb {
            background-color: rgba(29, 53, 87, 0.05);
            padding: 1rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.7rem;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            color: #666;
            font-size: 0.95rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 0.7rem;
            color: #999;
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }
        main {
            padding: 3rem 0;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: 2rem auto;
            overflow: hidden;
        }
        .article-header {
            text-align: center;
            padding: 0 2rem 2.5rem;
            border-bottom: 3px dashed var(--accent-color);
            margin-bottom: 3rem;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--secondary-color);
            margin-bottom: 1.2rem;
            line-height: 1.2;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 2rem;
            color: #666;
            font-size: 0.95rem;
            margin-top: 1.5rem;
        }
        .article-meta i {
            color: var(--primary-color);
            margin-right: 0.5rem;
        }
        .content-section {
            margin-bottom: 4rem;
            padding: 0 2.5rem;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid var(--accent-color);
            position: relative;
        }
        h2::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100px;
            height: 2px;
            background: var(--primary-color);
        }
        h3 {
            font-size: 1.7rem;
            color: #457b9d;
            margin: 2.5rem 0 1.2rem;
        }
        p {
            margin-bottom: 1.8rem;
            font-size: 1.1rem;
            text-align: justify;
            hyphens: auto;
        }
        .highlight-box {
            background: linear-gradient(135deg, #e0f7fa, #bbdefb);
            border-left: 5px solid var(--primary-color);
            padding: 2rem;
            margin: 2.5rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            box-shadow: 3px 3px 10px rgba(0,0,0,0.05);
        }
        .featured-image {
            width: 100%;
            max-width: 900px;
            margin: 3rem auto;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            transition: transform 0.5s ease;
        }
        .featured-image:hover {
            transform: scale(1.02);
        }
        .featured-image img {
            width: 100%;
            height: auto;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            padding: 1rem;
            background-color: #f9f9f9;
            border-top: 1px solid #eee;
        }
        .interactive-features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 4rem 2.5rem;
            padding: 2.5rem;
            background: var(--light-bg);
            border-radius: var(--border-radius);
        }
        .feature-box {
            background: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .feature-box:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .feature-box h3 {
            color: var(--primary-color);
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .feature-box form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
            margin-top: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        label {
            font-weight: 600;
            color: var(--secondary-color);
        }
        input, textarea, select {
            padding: 0.9rem 1.2rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.1);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ffd700;
            cursor: pointer;
        }
        .star-rating i {
            transition: var(--transition);
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        button, .btn {
            background: linear-gradient(45deg, var(--primary-color), #ff6b6b);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.7rem;
        }
        button:hover, .btn:hover {
            background: linear-gradient(45deg, #d00000, var(--primary-color));
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(230, 57, 70, 0.3);
        }
        .long-tail-links {
            background: linear-gradient(135deg, #1d3557, #457b9d);
            color: white;
            padding: 3rem 2rem;
            margin-top: 4rem;
            border-radius: var(--border-radius) var(--border-radius) 0 0;
        }
        .long-tail-links h2 {
            color: white;
            border-bottom-color: var(--accent-color);
            text-align: center;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.2rem;
            margin-top: 2rem;
        }
        .web-link {
            background: rgba(255, 255, 255, 0.1);
            padding: 1.2rem;
            border-radius: 8px;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateX(5px);
            border-color: var(--accent-color);
        }
        .web-link a {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .web-link i {
            color: var(--accent-color);
        }
        .site-footer {
            background: var(--secondary-color);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 2rem;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 1.5rem;
            width: 100%;
            color: #aaa;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
            .content-section, .article-header { padding: 0 1.5rem; }
            .interactive-features { margin: 3rem 1.5rem; padding: 2rem; }
        }
        @media (max-width: 768px) {
            .burger {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background: var(--secondary-color);
                flex-direction: column;
                padding: 2rem;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease;
                box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .main-nav ul {
                flex-direction: column;
                gap: 1.5rem;
            }
            .burger.active span:nth-child(1) {
                transform: rotate(45deg) translate(6px, 6px);
            }
            .burger.active span:nth-child(2) {
                opacity: 0;
            }
            .burger.active span:nth-child(3) {
                transform: rotate(-45deg) translate(7px, -6px);
            }
            .article-meta {
                flex-direction: column;
                gap: 0.8rem;
            }
            .interactive-features {
                grid-template-columns: 1fr;
            }
            .web-links-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            .content-section, .article-header { padding: 0 1rem; }
            .interactive-features { margin: 2rem 1rem; padding: 1.5rem; }
            .feature-box { padding: 1.5rem; }
            .web-links-container { grid-template-columns: 1fr; }
        }
        .bold { font-weight: 800; color: var(--primary-color); }
        .emoji { font-size: 1.3rem; margin-right: 0.5rem; }
        .text-center { text-align: center; }
        .mb-3 { margin-bottom: 3rem; }
        .mt-3 { margin-top: 3rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }