.blog-container{max-width:1400px;margin:0 auto;padding:2rem;display:grid;grid-template-columns:280px 1fr;gap:3rem;align-items:start}.toc-sidebar{position:sticky;top:100px;max-height:calc(100vh - 120px);overflow-y:auto;padding:1.5rem;background:white;border-radius:15px;box-shadow:0 5px 20px rgba(0,0,0,0.1)}.toc-sidebar::-webkit-scrollbar{width:4px}.toc-sidebar::-webkit-scrollbar-track{background:#f1f1f1;border-radius:10px}.toc-sidebar::-webkit-scrollbar-thumb{background:var(--primary-color);border-radius:10px}.toc-title{font-size:1.1rem;font-weight:700;color:var(--text-dark);margin-bottom:1rem;padding-bottom:.5rem;border-bottom:2px solid var(--primary-color)}.toc-list{list-style:none;padding:0;margin:0}.toc-list li{margin-bottom:.75rem}.toc-list a{color:var(--text-light);text-decoration:none;font-size:.9rem;display:block;padding:.5rem;border-radius:8px;transition:all .3s}.toc-list a:hover{color:var(--primary-color);background:rgba(255,107,53,0.1);padding-left:1rem}.toc-list a.active{color:var(--primary-color);font-weight:600;background:rgba(255,107,53,0.1);padding-left:1rem}.article-content{background:white;padding:3rem;border-radius:15px;box-shadow:0 5px 20px rgba(0,0,0,0.05)}.article-header{margin-bottom:2rem;padding-bottom:2rem;border-bottom:2px solid #f0f0f0}.entry-title{font-size:2.5rem;color:var(--text-dark);margin-bottom:1rem;line-height:1.2}.article-meta{color:var(--text-light);font-size:.9rem}.the_content{font-size:1.1rem;line-height:1.8;color:var(--text-dark)}.the_content p{margin-bottom:1.5rem}.the_content h2{font-size:1.8rem;color:var(--text-dark);margin-top:3rem;margin-bottom:1.5rem;padding-bottom:.5rem;border-bottom:2px solid var(--primary-color);scroll-margin-top:100px}.the_content h3{font-size:1.4rem;color:var(--text-dark);margin-top:2rem;margin-bottom:1rem;scroll-margin-top:100px}.the_content a{color:var(--primary-color);text-decoration:none;border-bottom:1px solid transparent;transition:all .3s}.the_content a:hover{border-bottom-color:var(--primary-color)}.the_content ul{margin-bottom:1.5rem;padding-left:2rem}.the_content li{margin-bottom:.75rem;line-height:1.7}.the_content img{max-width:100%;height:auto;border-radius:10px;margin:1.5rem 0;box-shadow:0 5px 15px rgba(0,0,0,0.1)}.download-box{background:linear-gradient(135deg,var(--gradient-start) 0,var(--gradient-end) 100%);color:white;padding:1.5rem;border-radius:10px;margin:2rem 0}.download-box a{color:white;font-weight:600;text-decoration:underline}.toc-sublist{list-style:none;padding-left:1.2rem;margin-top:.5rem;margin-bottom:0}.toc-sublist li{margin-bottom:.5rem}.toc-sublist a{font-size:.85rem;color:var(--text-light);opacity:.8}.toc-sublist a:hover,.toc-sublist a.active{opacity:1}main{max-width:1200px;margin:3rem auto;padding:0 2rem}.intro{background:white;padding:2rem;border-radius:10px;margin-bottom:3rem;box-shadow:0 2px 8px rgba(0,0,0,0.08)}.intro h2{color:#667eea;margin-bottom:1rem;font-size:1.8rem}.categories{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:2rem;margin-top:2rem}.category-card{background:white;border-radius:10px;padding:2rem;box-shadow:0 2px 8px rgba(0,0,0,0.08);transition:transform .3s ease,box-shadow .3s ease;text-decoration:none;color:inherit;display:block;border-top:4px solid #667eea}.category-card:hover{transform:translateY(-5px);box-shadow:0 5px 20px rgba(102,126,234,0.2)}.category-icon{font-size:2.5rem;margin-bottom:1rem;display:block}.category-card h3{color:#333;font-size:1.5rem;margin-bottom:.5rem}.category-card p{color:#666;font-size:.95rem;line-height:1.5}@media(max-width:1024px){.blog-container{grid-template-columns:1fr;gap:2rem}.toc-sidebar{position:relative;top:0;max-height:none;margin-bottom:2rem}.article-content{padding:2rem}.entry-title{font-size:2rem}}@media(max-width:768px){.blog-container{padding:1rem}.article-content{padding:1.5rem}.entry-title{font-size:1.75rem}.the_content{font-size:1rem}.the_content h2{font-size:1.5rem}.categories{grid-template-columns:1fr}}