*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Roboto',sans-serif;background-color:#f8f9fa;color:#212529;line-height:1.6;min-height:100vh;display:flex;flex-direction:column}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}h1,h2,h3,h4,h5,h6{font-family:'Poppins',sans-serif;font-weight:600;line-height:1.3}a{text-decoration:none;color:inherit;transition:all 0.3s ease}:root{--primary:#6a11cb;--primary-gradient:linear-gradient(90deg,#6a11cb 0%,#2575fc 100%);--secondary:#2575fc;--accent:#ff6b6b;--success:#06d6a0;--warning:#ffd166;--danger:#ef476f;--dark:#2d3436;--light:#f8f9fa;--gray-100:#f8f9fa;--gray-200:#e9ecef;--gray-300:#dee2e6;--gray-400:#ced4da;--gray-500:#adb5bd;--gray-600:#6c757d;--gray-700:#495057;--gray-800:#343a40;--gray-900:#212529;--instagram:#E4405F;--tiktok:#000000;--youtube:#FF0000}.navbar{background:var(--primary-gradient);color:white;box-shadow:0 4px 20px rgba(0,0,0,0.1);position:sticky;top:0;z-index:1000}.navbar .container{display:flex;justify-content:space-between;align-items:center;height:64px}.logo{display:flex;align-items:center;gap:10px;font-size:1.5rem;font-weight:700}.nav-links{display:flex;gap:24px;align-items:center}.nav-link{padding:8px 16px;border-radius:8px;display:flex;align-items:center;gap:8px}.nav-link:hover{background:rgba(255,255,255,0.2)}.nav-link.active{background:rgba(255,255,255,0.25);font-weight:500}.nav-link.calculator-btn{background:white;color:var(--primary);font-weight:500}.nav-link.calculator-btn:hover{box-shadow:0 10px 25px rgba(0,0,0,0.15);transform:translateY(-2px)}.dropdown{position:relative}.dropdown-menu{position:absolute;top:100%;left:0;background:white;color:var(--gray-800);border-radius:8px;box-shadow:0 15px 40px rgba(0,0,0,0.1);padding:8px 0;min-width:200px;display:none;z-index:1001}.dropdown:hover .dropdown-menu{display:block}.dropdown-menu a{display:block;padding:8px 16px;color:var(--gray-700)}.dropdown-menu a:hover,.dropdown-menu a.active{background:var(--gray-100);color:var(--primary)}.mobile-menu-btn{display:none;background:none;border:none;color:white;font-size:1.5rem;cursor:pointer}.main-content{flex:1;padding:48px 0}.article-content{max-width:900px;margin:0 auto}.article-header{margin-bottom:48px}.article-tags{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px;align-items:center}.tag{padding:6px 12px;border-radius:20px;font-size:0.875rem;font-weight:600}.tag-featured{background:var(--primary);color:white}.article-meta{color:var(--gray-600);font-size:0.875rem;display:inline-flex;align-items:center;gap:4px}.article-title{font-size:3rem;color:var(--gray-800);margin-bottom:16px;line-height:1.2}@media (max-width:768px){.article-title{font-size:2rem}}.article-subtitle{font-size:1.25rem;color:var(--gray-600);margin-bottom:32px}.featured-image{position:relative;border-radius:20px;overflow:hidden;box-shadow:0 20px 40px rgba(0,0,0,0.1);margin-bottom:32px}.featured-img{width:100%;height:400px;object-fit:cover;display:block}.image-caption{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(to top,rgba(0,0,0,0.7),transparent);padding:24px;color:white;font-size:0.875rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px;margin-bottom:48px}.stat-card{background:white;padding:24px;border-radius:16px;box-shadow:0 5px 20px rgba(0,0,0,0.08);border-left:4px solid;transition:transform 0.3s ease,box-shadow 0.3s ease}.stat-card:hover{transform:translateY(-5px);box-shadow:0 15px 30px rgba(0,0,0,0.15)}.stat-card:nth-child(1){border-left-color:var(--secondary)}.stat-card:nth-child(2){border-left-color:var(--instagram)}.stat-card:nth-child(3){border-left-color:var(--youtube)}.stat-header{display:flex;align-items:center;gap:12px;margin-bottom:16px}.stat-icon{width:40px;height:40px;background:var(--gray-100);border-radius:50%;display:flex;align-items:center;justify-content:center}.stat-icon i{font-size:1.25rem}.stat-card:nth-child(1) .stat-icon{background:rgba(37,117,252,0.1);color:var(--secondary)}.stat-card:nth-child(2) .stat-icon{background:rgba(228,64,95,0.1);color:var(--instagram)}.stat-card:nth-child(3) .stat-icon{background:rgba(255,0,0,0.1);color:var(--youtube)}.stat-value{font-size:2rem;font-weight:700;color:var(--gray-800);margin-bottom:4px}.stat-description{font-size:0.875rem;color:var(--gray-600)}.toc-container{background:linear-gradient(to right,#e6f0ff,#f0e6ff);padding:32px;border-radius:20px;margin-bottom:48px}.toc-title{font-size:1.75rem;color:var(--gray-800);margin-bottom:24px;display:flex;align-items:center;gap:12px}.toc-title i{color:var(--primary)}.toc-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:32px}.toc-list{list-style:none}.toc-list li{margin-bottom:12px;display:flex;align-items:flex-start;gap:12px}.toc-list i{color:var(--success);margin-top:2px}.toc-list span{color:var(--gray-700)}.article-text{color:var(--gray-700);line-height:1.8;margin-bottom:24px;font-size:1.1rem}.article-text strong{color:var(--dark)}.note-box{padding:20px;border-radius:12px;margin:24px 0;border-left:4px solid}.note-info{background:rgba(37,117,252,0.1);border-left-color:var(--secondary)}.note-warning{background:rgba(255,107,107,0.1);border-left-color:var(--danger)}.comparison-section{margin-bottom:64px}.section-title{font-size:2.5rem;color:var(--gray-800);margin-bottom:16px;text-align:center}@media (max-width:768px){.section-title{font-size:1.75rem}}.section-subtitle{text-align:center;color:var(--gray-600);margin-bottom:32px;font-size:1.1rem}.table-container{overflow-x:auto;margin-bottom:16px;border-radius:12px;box-shadow:0 5px 20px rgba(0,0,0,0.08)}.comparison-table{width:100%;border-collapse:collapse;background:white;min-width:800px}.comparison-table thead{background:var(--gray-100)}.comparison-table th{padding:20px;text-align:left;font-weight:600;color:var(--gray-700);border-bottom:2px solid var(--gray-200)}.comparison-table td{padding:20px;border-bottom:1px solid var(--gray-200);vertical-align:top}.comparison-table tr:hover{background:var(--gray-50)}.platform-cell{font-weight:600;display:flex;align-items:center;gap:8px}.platform-cell i{font-size:1.25rem}.platform-cell .fa-instagram{color:var(--instagram)}.platform-cell .fa-tiktok{color:var(--tiktok)}.platform-cell .fa-youtube{color:var(--youtube)}.table-footnote{font-size:0.875rem;color:var(--gray-600);text-align:center;margin-top:16px}.platform-section{margin-bottom:64px}.platform-title{display:flex;align-items:center;gap:16px}.platform-title i{font-size:2.5rem}.platform-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:32px;margin:32px 0}.platform-card{background:white;padding:24px;border-radius:16px;box-shadow:0 5px 20px rgba(0,0,0,0.08)}.platform-card h3{margin-bottom:20px;color:var(--gray-800)}.checklist{list-style:none}.checklist li{margin-bottom:16px;display:flex;align-items:flex-start;gap:12px}.checklist i{margin-top:2px}.checklist .fa-check-circle{color:var(--success)}.checklist .fa-exclamation-triangle{color:var(--warning)}.strategy-box{padding:24px;border-radius:16px;margin:32px 0}.strategy-instagram{background:rgba(228,64,95,0.1);border-left:4px solid var(--instagram)}.strategy-tiktok{background:rgba(0,0,0,0.9);color:white;border-left:4px solid #00f2ea}.strategy-box h4{margin-bottom:16px;display:flex;align-items:center;gap:8px}.strategy-instagram h4 i{color:var(--instagram)}.strategy-tiktok h4 i{color:#ff0050}.strategy-box p{margin-bottom:12px}.strategy-list{list-style:none;margin-top:16px;padding-left:0}.strategy-list li{margin-bottom:12px;padding-left:24px;position:relative}.strategy-list li:before{content:"•";color:#00f2ea;font-size:1.5rem;position:absolute;left:0;top:-2px}.info-box{background:var(--gray-100);padding:20px;border-radius:12px;border-left:4px solid var(--gray-500);margin-top:24px}.info-box h4{display:flex;align-items:center;gap:8px;margin-bottom:12px;color:var(--gray-800)}.info-box h4 i{color:var(--gray-500)}.tiktok-features{background:linear-gradient(to bottom right,#000000,#333333);color:white;padding:24px;border-radius:16px}.tiktok-features h4{font-size:1.5rem;margin-bottom:20px}.feature-list{list-style:none}.feature-list li{margin-bottom:16px;display:flex;align-items:center;gap:12px}.feature-list i{color:#00f2ea;font-size:1.25rem}.engagement-card{background:white;padding:20px;border-radius:12px;box-shadow:0 3px 15px rgba(0,0,0,0.08);margin-top:20px}.engagement-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;font-weight:600}.engagement-rate{color:var(--success);font-weight:700;font-size:1.25rem}.engagement-note{font-size:0.875rem;color:var(--gray-600)}.youtube-value{background:white;border-radius:16px;box-shadow:0 5px 20px rgba(0,0,0,0.08);padding:32px;margin:32px 0}.youtube-value h3{margin-bottom:32px;color:var(--gray-800);text-align:center;font-size:1.75rem}.value-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px}.value-card{text-align:center;padding:20px}.value-card h4{margin-bottom:12px;color:var(--gray-800);font-size:1.1rem}.value-card p{color:var(--gray-600);line-height:1.6}.investment-calc{background:rgba(255,0,0,0.1);border-left:4px solid var(--youtube);padding:24px;border-radius:12px}.investment-calc h4{display:flex;align-items:center;gap:8px;margin-bottom:16px;color:var(--gray-800)}.investment-calc h4 i{color:var(--youtube)}.trend-section{margin-bottom:64px}.trend-container{background:linear-gradient(to right,rgba(230,240,255,0.8),rgba(240,230,255,0.8));padding:32px;border-radius:20px;display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:32px;align-items:start}.trend-content h3{display:flex;align-items:center;gap:8px;margin-bottom:20px;color:var(--gray-800)}.trend-content h3 i{color:var(--primary)}.trend-list{margin-top:16px;padding-left:20px}.trend-list li{margin-bottom:12px;color:var(--gray-700)}.trend-platforms{background:white;padding:24px;border-radius:16px;box-shadow:0 5px 20px rgba(0,0,0,0.08)}.trend-platforms h4{margin-bottom:20px;color:var(--gray-800)}.platform-list{list-style:none}.platform-list li{margin-bottom:16px;display:flex;align-items:center;gap:12px}.platform-list i{font-size:1.25rem}.platform-list .fa-tiktok{color:var(--tiktok)}.platform-list .fa-instagram{color:var(--instagram)}.platform-list .fa-youtube{color:var(--youtube)}.action-section{margin-bottom:64px}.choice-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:32px;margin-bottom:48px}.choice-step{text-align:center;padding:32px 24px;background:white;border-radius:16px;box-shadow:0 5px 20px rgba(0,0,0,0.08);position:relative}.step-number{width:48px;height:48px;background:var(--primary);color:white;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;margin:0 auto 20px}.choice-step h4{margin-bottom:16px;color:var(--gray-800)}.choice-step p{color:var(--gray-600);line-height:1.6}.recommendation-table{overflow-x:auto;margin-top:32px}.recommendation-table table{width:100%;min-width:600px;border-collapse:collapse;background:white;box-shadow:0 3px 15px 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rgba(0,0,0,0.2)}.related-section{margin-bottom:64px}.related-section h3{font-size:1.75rem;margin-bottom:32px;color:var(--gray-800)}.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}.related-card{background:white;border-radius:16px;overflow:hidden;box-shadow:0 5px 20px rgba(0,0,0,0.08);transition:all 0.3s ease}.related-card:hover{transform:translateY(-5px);box-shadow:0 15px 30px rgba(0,0,0,0.15)}.related-image{width:100%;height:200px;object-fit:cover;display:block}.related-content{padding:24px}.related-content h4{font-size:1.25rem;margin-bottom:12px;color:var(--gray-800);transition:color 0.3s ease}.related-card:hover .related-content h4{color:var(--primary)}.related-content p{color:var(--gray-600);font-size:0.875rem;line-height:1.6}.footer{background:var(--gray-900);color:white;padding-top:48px;padding-bottom:24px}.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:32px;margin-bottom:48px}.footer-section h4{font-size:1.125rem;margin-bottom:16px}.footer-links{list-style:none}.footer-links li{margin-bottom:8px}.footer-links a{color:var(--gray-400);display:flex;align-items:center;gap:8px}.footer-links a:hover{color:white}.newsletter{margin-bottom:24px}.newsletter-input{display:flex}.newsletter-input input{flex:1;padding:8px 12px;border:none;border-radius:8px 0 0 8px;outline:none;color:var(--gray-800)}.newsletter-input button{background:var(--primary);color:white;border:none;padding:8px 16px;border-radius:0 8px 8px 0;cursor:pointer;transition:background 0.3s ease}.newsletter-input button:hover{background:var(--secondary)}.social-links{display:flex;gap:16px;margin-top:16px}.social-link{width:40px;height:40px;background:var(--gray-800);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:background 0.3s ease}.social-link:hover{background:var(--primary)}.social-link.twitter:hover{background:#1da1f2}.social-link.instagram:hover{background:#e4405f}.social-link.linkedin:hover{background:#0077b5}.social-link.youtube:hover{background:#ff0000}.footer-bottom{border-top:1px solid var(--gray-800);padding-top:24px;text-align:center}.footer-bottom p{color:var(--gray-400);margin-bottom:8px}.footer-note{max-width:800px;margin:0 auto 16px;font-size:0.875rem;color:var(--gray-500)}.footer-features{display:flex;justify-content:center;gap:24px;margin-top:16px}.feature{display:inline-flex;align-items:center;gap:4px;font-size:0.75rem;color:var(--gray-500)}.mobile-menu{position:fixed;top:64px;left:0;right:0;background:white;padding:24px;border-top:1px solid var(--gray-200);display:none;flex-direction:column;gap:16px;box-shadow:0 10px 30px rgba(0,0,0,0.1);z-index:999}.mobile-menu.active{display:flex}.mobile-menu a{padding:12px 16px;color:var(--gray-700);border-radius:8px;display:flex;align-items:center;gap:12px}.mobile-menu a:hover{background:var(--gray-100);color:var(--primary)}@media (max-width:768px){.navbar .container{padding:0 16px}.nav-links{display:none}.mobile-menu-btn{display:block}.article-title{font-size:2rem}.article-subtitle{font-size:1rem}.stats-grid{grid-template-columns:1fr}.featured-img{height:250px}.toc-content{grid-template-columns:1fr}.platform-grid{grid-template-columns:1fr}.value-grid{grid-template-columns:1fr}.trend-container{grid-template-columns:1fr}.choice-grid{grid-template-columns:1fr}.author-cta-grid{grid-template-columns:1fr}.related-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-features{flex-direction:column;align-items:center;gap:8px}}@keyframes fadeIn{from{opacity:0}to{opacity:1}}@keyframes slideUp{from{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.fade-in{animation:fadeIn 0.5s ease-in}.slide-up{animation:slideUp 0.3s ease-out}.article-section,.platform-section,.trend-section,.action-section{opacity:0;transform:translateY(20px);transition:all 0.6s ease}.article-section.visible,.platform-section.visible,.trend-section.visible,.action-section.visible{opacity:1;transform:translateY(0)}.back-to-top{position:fixed;bottom:30px;right:30px;width:50px;height:50px;background:var(--primary);color:white;border:none;border-radius:50%;cursor:pointer;display:none;align-items:center;justify-content:center;font-size:1.25rem;box-shadow:0 5px 15px rgba(0,0,0,0.2);transition:all 0.3s ease;z-index:100}.back-to-top:hover{background:var(--secondary);transform:translateY(-3px);box-shadow:0 8px 20px rgba(0,0,0,0.3)}@media print{.navbar,.footer,.mobile-menu-btn,.mobile-menu,.social-links,.newsletter,.related-section,.author-cta-grid,.back-to-top{display:none !important}body{background:white;font-size:12pt}.container{max-width:100%;padding:0}.article-content{box-shadow:none;padding:0}.stat-card,.platform-card,.strategy-box,.info-box{break-inside:avoid;box-shadow:none;border:1px solid #ddd}.table-container{overflow:visible;box-shadow:none}.comparison-table,.recommendation-table table{box-shadow:none;border:1px solid #ddd}}