* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #1a237e;
            --secondary-color: #ff9800;
            --accent-color: #4caf50;
            --text-color: #333;
            --light-bg: #f5f5f5;
            --border-color: #ddd;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        .header {
            background: linear-gradient(135deg, var(--primary-color) 0%, #283593 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo i {
            color: var(--secondary-color);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-link:hover {
            background: rgba(255,255,255,0.15);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-nav {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background: var(--primary-color);
            padding: 1rem;
            transform: translateY(-100%);
            opacity: 0;
            transition: var(--transition);
            z-index: 999;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            transform: translateY(0);
            opacity: 1;
        }
        .mobile-nav .nav-link {
            display: block;
            padding: 0.8rem 1rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .breadcrumb {
            background: var(--light-bg);
            padding: 0.8rem 1.5rem;
            font-size: 0.9rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem 1.5rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media (max-width: 992px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        .article-header {
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        .article-title {
            font-size: 2.2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .meta-info {
            display: flex;
            gap: 1rem;
            color: #666;
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .meta-item {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .article-content {
            font-size: 1.05rem;
        }
        .article-section {
            margin-bottom: 2.5rem;
            scroll-margin-top: 2rem;
        }
        .section-title {
            font-size: 1.6rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
            border-left: 4px solid var(--secondary-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .solution-step {
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .solution-step:hover {
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
            transform: translateY(-2px);
        }
        .step-number {
            display: inline-block;
            background: var(--primary-color);
            color: white;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            text-align: center;
            line-height: 32px;
            margin-right: 0.8rem;
            font-weight: bold;
        }
        .feature-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .widget {
            background: var(--light-bg);
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            border: 1px solid var(--border-color);
        }
        .widget-title {
            font-size: 1.2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form {
            display: flex;
            margin-bottom: 1rem;
        }
        .search-input {
            flex: 1;
            padding: 0.8rem;
            border: 1px solid var(--border-color);
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-button {
            background: var(--secondary-color);
            color: white;
            border: none;
            padding: 0.8rem 1.2rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background: #e68900;
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            margin-bottom: 1rem;
        }
        .star {
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star.active,
        .star:hover {
            color: #ffc107;
        }
        .rating-form input,
        .comment-form input,
        .comment-form textarea {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 0.8rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
        }
        .submit-button {
            background: var(--accent-color);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            width: 100%;
        }
        .submit-button:hover {
            background: #3d8b40;
        }
        .comment {
            background: white;
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1rem;
            border: 1px solid var(--border-color);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
            color: #666;
        }
        .longtail-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin: 3rem 0;
            padding: 2rem 1.5rem;
            background: var(--light-bg);
            border-radius: 8px;
        }
        .web-link {
            background: white;
            padding: 1rem;
            border-radius: 4px;
            border: 1px solid var(--border-color);
        }
        .web-link a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }
        .web-link a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .footer {
            background: var(--primary-color);
            color: white;
            padding: 3rem 1.5rem 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            margin-bottom: 1.2rem;
            color: var(--secondary-color);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.5rem;
        }
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 0.3rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .article-title {
                font-size: 1.8rem;
            }
            .main-container {
                padding: 1.5rem 1rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .longtail-links {
                grid-template-columns: 1fr;
            }
        }
        .text-bold {
            font-weight: 700;
            color: var(--primary-color);
        }
        .text-highlight {
            background: linear-gradient(120deg, #ffecb3 0%, #ffecb3 100%);
            padding: 0.1rem 0.3rem;
            border-radius: 2px;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }