:root {
            --primary: #ff6b35;
            --secondary: #1a73e8;
            --dark: #202124;
            --light: #f8f9fa;
            --gray: #5f6368;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        body {
            background-color: #fff;
            color: var(--dark);
            line-height: 1.7;
            font-size: 1.05rem;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--dark);
            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;
        }
        .logo a {
            color: white;
            text-decoration: none;
            font-size: 1.8rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo .fa-bolt {
            color: var(--primary);
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            transition: color 0.3s;
            padding: 0.5rem 0;
        }
        .desktop-nav a:hover {
            color: var(--primary);
            border-bottom: 2px solid var(--primary);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background: var(--dark);
            padding: 1rem;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            display: block;
        }
        .mobile-nav ul {
            list-style: none;
        }
        .mobile-nav li {
            margin: 1rem 0;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            font-size: 1.2rem;
            display: block;
            padding: 0.5rem;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #f1f3f4;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--secondary);
            text-decoration: none;
        }
        .breadcrumb span {
            color: var(--gray);
        }
        .search-container {
            max-width: 600px;
            margin: 2.5rem auto;
            padding: 0 1rem;
        }
        .search-box {
            display: flex;
            box-shadow: var(--shadow);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-box input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1rem;
            outline: none;
        }
        .search-box button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 1.8rem;
            cursor: pointer;
            font-size: 1.1rem;
            transition: background 0.3s;
        }
        .search-box button:hover {
            background: #e55a2b;
        }
        main {
            padding: 2rem 0 4rem;
        }
        .article-header {
            margin-bottom: 3rem;
        }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 1.2rem;
        }
        .article-meta {
            display: flex;
            gap: 1.5rem;
            color: var(--gray);
            font-size: 0.95rem;
            margin-bottom: 2rem;
        }
        .meta-item i {
            margin-right: 0.5rem;
        }
        .hero-image {
            width: 100%;
            height: 400px;
            object-fit: cover;
            border-radius: 12px;
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .content-section {
            margin-bottom: 3.5rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--secondary);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.7rem;
            border-bottom: 2px solid #eee;
        }
        h3 {
            font-size: 1.6rem;
            color: var(--dark);
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fff8e1;
            border-left: 4px solid var(--primary);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.8rem;
        }
        a.content-link {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 600;
        }
        a.content-link:hover {
            text-decoration: underline;
            color: #0d5bb9;
        }
        .info-box {
            background: #e8f0fe;
            border-radius: 12px;
            padding: 2rem;
            margin: 2.5rem 0;
            display: grid;
            grid-template-columns: 60px 1fr;
            gap: 1.5rem;
            align-items: start;
        }
        .info-icon {
            font-size: 2.5rem;
            color: var(--secondary);
        }
        .rating-section {
            background: #f8f9fa;
            border-radius: 12px;
            padding: 2.5rem;
            margin: 3rem 0;
            text-align: center;
            border: 1px solid #ddd;
        }
        .rating-title {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin-bottom: 2rem;
            font-size: 2.2rem;
            color: #ddd;
            cursor: pointer;
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: #ffc107;
        }
        .rating-form {
            max-width: 500px;
            margin: 0 auto;
            display: none;
            grid-template-columns: 1fr;
            gap: 1rem;
        }
        .rating-form.active {
            display: grid;
        }
        .rating-form input,
        .rating-form textarea {
            padding: 0.9rem;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-size: 1rem;
        }
        .rating-form button {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 1rem;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .rating-form button:hover {
            background: #0d5bb9;
        }
        .comments-section {
            margin-top: 4rem;
        }
        .comment-form {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 12px;
            margin-bottom: 3rem;
        }
        .comment-form h3 {
            margin-top: 0;
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        .form-grid input,
        .comment-form textarea {
            padding: 0.9rem;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-size: 1rem;
            width: 100%;
        }
        .comment-form textarea {
            min-height: 150px;
            resize: vertical;
        }
        .comment-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 8px;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: background 0.3s;
        }
        .comment-form button:hover {
            background: #e55a2b;
        }
        .comment-list {
            margin-top: 2rem;
        }
        .comment-item {
            border-bottom: 1px solid #eee;
            padding: 1.8rem 0;
            display: grid;
            grid-template-columns: 60px 1fr;
            gap: 1.5rem;
        }
        .comment-avatar {
            width: 60px;
            height: 60px;
            background: var(--secondary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.8rem;
        }
        .comment-content h4 {
            margin-bottom: 0.5rem;
            color: var(--dark);
        }
        .comment-date {
            color: var(--gray);
            font-size: 0.9rem;
            margin-bottom: 0.8rem;
        }
        .longtail-links {
            background: #f1f8ff;
            padding: 3rem 0;
            margin-top: 3rem;
        }
        .web-link {
            display: inline-block;
            background: white;
            padding: 0.9rem 1.8rem;
            margin: 0.7rem;
            border-radius: 50px;
            text-decoration: none;
            color: var(--secondary);
            font-weight: 600;
            box-shadow: 0 3px 8px rgba(0, 0, 0, 0.08);
            transition: all 0.3s;
            border: 1px solid #dce7ff;
        }
        .web-link:hover {
            background: var(--secondary);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(26, 115, 232, 0.2);
        }
        footer {
            background: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-column h3 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            border-bottom: 2px solid var(--primary);
            padding-bottom: 0.7rem;
        }
        .footer-column ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-column li {
            margin-bottom: 0.8rem;
        }
        .footer-column a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-column a:hover {
            color: var(--primary);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            .article-header h1 {
                font-size: 2.4rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .hero-image {
                height: 320px;
            }
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .info-box {
                grid-template-columns: 1fr;
            }
            .comment-item {
                grid-template-columns: 1fr;
            }
            .comment-avatar {
                width: 50px;
                height: 50px;
                font-size: 1.5rem;
            }
            .star-rating {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            .article-header h1 {
                font-size: 1.7rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 0.5rem;
            }
            .hero-image {
                height: 220px;
            }
            .rating-section,
            .comment-form {
                padding: 1.5rem;
            }
        }