* {margin: 0; padding: 0; box-sizing: border-box;}
        body {font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: #f8f9fa; color: #1a202c; line-height: 1.6;}
        .top-nav {background: #2d3748; color: white; box-shadow: 0 2px 10px rgba(0,0,0,0.1); position: sticky; top: 0; z-index: 1000;}
        .nav-container {max-width: 1400px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0 20px;}
        .logo {font-size: 24px; font-weight: 700; padding: 15px 0; color: white; text-decoration: none;}
        .logo span {background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent;}
        .nav-menu {display: flex; list-style: none;}
        .nav-menu li a {color: white; text-decoration: none; padding: 20px; display: block; transition: all 0.3s;}
        .nav-menu li a:hover {background: rgba(102, 126, 234, 0.2);}
        .mobile-menu-btn {display: none; background: none; border: none; color: white; font-size: 24px; cursor: pointer;}
        .hero {background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; padding: 60px 20px 40px;}
        .hero-content {max-width: 800px; margin: 0 auto;}
        .breadcrumb {font-size: 14px; margin-bottom: 20px; opacity: 0.9;}
        .breadcrumb a {color: white; text-decoration: none;}
        .hero h1 {font-size: 42px; font-weight: 700; margin-bottom: 15px; line-height: 1.2;}
        .article-meta {display: flex; gap: 20px; font-size: 14px; opacity: 0.9;}
        .container {max-width: 1400px; margin: 40px auto; padding: 0 20px; display: grid; grid-template-columns: 300px 1fr 300px; gap: 30px;}
        .sidebar-left, .sidebar-right {position: sticky; top: 80px; height: fit-content;}
        .sidebar-ad {background: white; border-radius: 10px; padding: 20px; min-height: 600px; display: flex; align-items: center; justify-content: center; border: 1px solid #e9ecef;}
        .ad-placeholder {color: #6c757d; font-size: 11px;}
        .article-content {background: white; border-radius: 15px; padding: 50px; box-shadow: 0 2px 20px rgba(0,0,0,0.08);}
        .article-content h2 {color: #2d3748; font-size: 32px; margin: 40px 0 20px; font-weight: 700;}
        .article-content h3 {color: #2d3748; font-size: 24px; margin: 30px 0 15px; font-weight: 600;}
        .article-content p {color: #4a5568; font-size: 17px; line-height: 1.8; margin-bottom: 20px;}
        .article-content ul, .article-content ol {margin: 20px 0 20px 30px; color: #4a5568;}
        .article-content li {margin-bottom: 12px; line-height: 1.7; font-size: 17px;}
        .highlight-box {background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%); border-radius: 12px; padding: 25px; margin: 25px 0; border-left: 4px solid #667eea;}
        .pricing-method {background: #f7fafc; border-radius: 10px; padding: 25px; margin: 20px 0; border-left: 4px solid #667eea;}
        .pricing-method h4 {color: #2d3748; font-size: 20px; margin-bottom: 15px;}
        .pros-cons {display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 15px 0;}
        .pros {background: #f0fff4; padding: 15px; border-radius: 8px; border-left: 3px solid #48bb78;}
        .cons {background: #fff5f5; padding: 15px; border-radius: 8px; border-left: 3px solid #f56565;}
        .example-box {background: #fef5e7; border-left: 4px solid #f39c12; padding: 25px; margin: 25px 0; border-radius: 8px;}
        .cta-box {background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; padding: 30px; border-radius: 12px; text-align: center; margin: 40px 0;}
        .cta-box h3 {color: white; margin-bottom: 15px;}
        .cta-button {display: inline-block; background: white; color: #667eea; padding: 15px 40px; border-radius: 8px; text-decoration: none; font-weight: 600; margin-top: 15px; transition: all 0.3s;}
        .cta-button:hover {transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0,0,0,0.2);}
        footer {background: #2d3748; color: white; padding: 50px 20px 20px; margin-top: 60px;}
        .footer-content {max-width: 1400px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; margin-bottom: 40px;}
        .footer-section h4 {font-size: 18px; margin-bottom: 20px; color: #667eea;}
        .footer-section ul {list-style: none;}
        .footer-section ul li {margin-bottom: 10px;}
        .footer-section ul li a {color: rgba(255,255,255,0.8); text-decoration: none;}
        .footer-section ul li a:hover {color: #667eea;}
        .footer-bottom {border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; text-align: center; color: rgba(255,255,255,0.6); font-size: 14px;}
        @media (max-width: 1200px) {.container {grid-template-columns: 250px 1fr;} .sidebar-right {display: none;} .pros-cons {grid-template-columns: 1fr;}}
        @media (max-width: 968px) {.container {grid-template-columns: 1fr;} .sidebar-left {position: static;} .footer-content {grid-template-columns: repeat(2, 1fr);}}
        @media (max-width: 768px) {.nav-menu {display: none; position: absolute; top: 100%; left: 0; right: 0; background: #2d3748; flex-direction: column;} .nav-menu.active {display: flex;} .mobile-menu-btn {display: block;} .hero h1 {font-size: 28px;} .article-content {padding: 30px 25px;} .footer-content {grid-template-columns: 1fr;}}