.pns-article__content .toc-box{background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;box-shadow:0 4px 15px #00000005;margin-bottom:40px;padding:24px}.pns-article__content .toc-title{align-items:center;border-bottom:2px solid #e2e8f0;color:#1a202c;display:flex;font-size:18px;font-weight:700;gap:10px;margin-bottom:16px;padding-bottom:10px}.pns-article__content .toc-title svg{fill:var(--primary-color);height:20px;width:20px}.pns-article__content .toc-list{display:grid;gap:12px 24px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));list-style:none;margin:0;padding:0}.pns-article__content .toc-list li{margin:0;padding-left:18px;position:relative}.pns-article__content .toc-list li:before{color:var(--primary-color);content:"•";font-size:16px;font-weight:700;left:4px;position:absolute}.pns-article__content .toc-list a{color:#4a5568;font-size:14px;font-weight:500;text-decoration:none;transition:all .2s ease}.pns-article__content .toc-list a:hover{color:var(--primary-color);padding-left:4px}.pns-article__content h2.tech-h2{border-bottom:1px dashed #e2e8f0;color:#1a202c;font-size:22px;font-weight:700;margin:40px 0 20px;padding-bottom:10px;position:relative}.pns-article__content h2.tech-h2:before{background-color:var(--primary-color);bottom:-1px;content:"";height:2px;left:0;position:absolute;width:60px}.pns-article__content h3.tech-h3{align-items:center;color:#2d3748;display:flex;font-size:18px;font-weight:600;gap:8px;margin:28px 0 14px}.pns-article__content h3.tech-h3:before{background-color:var(--primary-color);border-radius:2px;content:"";display:inline-block;height:16px;width:4px}.pns-article__content .tech-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));margin:24px 0 32px}.pns-article__content .tech-card{background:#fff;border:1px solid #edf2f7;border-radius:10px;box-shadow:0 4px 10px #00000003;padding:20px;transition:all .3s ease}.pns-article__content .tech-card:hover{border-color:var(--primary-color);box-shadow:0 8px 20px #4dbb6d0f;transform:translateY(-2px)}.pns-article__content .tech-card__title{align-items:center;color:#2d3748;display:flex;font-size:16px;font-weight:700;gap:8px;margin-bottom:12px}.pns-article__content .tech-card__title svg{fill:var(--primary-color);flex-shrink:0;height:18px;width:18px}.pns-article__content .tech-card__text{color:#4a5568;font-size:14px;line-height:1.6;margin:0}.pns-article__content .tech-callout{border-radius:8px;font-size:14px;line-height:1.6;margin:24px 0;padding:18px 20px}.pns-article__content .tech-callout p:last-child{margin-bottom:0}.pns-article__content .tech-callout--tip{background:#f0fdf4;border-left:4px solid var(--primary-color);color:#2d3748}.pns-article__content .tech-callout--warning{background:#fffbeb;border-left:4px solid #f59e0b;color:#78350f}.pns-article__content .tech-callout--important{background:#eff6ff;border-left:4px solid #3b82f6;color:#1e3a8a}.pns-article__content .tech-callout__title{align-items:center;display:flex;font-weight:700;gap:8px;margin-bottom:6px}.pns-article__content .tech-table-wrapper{border:1px solid #e2e8f0;border-radius:8px;margin:24px 0;overflow-x:auto}.pns-article__content .tech-table{border-collapse:collapse;margin:0!important;width:100%}.pns-article__content .tech-table th{background-color:#f1fcf4;border-bottom:2px solid #cbd5e1;color:#2d8b4d;font-size:14px;font-weight:700;padding:14px 16px}.pns-article__content .tech-table td{border-bottom:1px solid #e2e8f0;color:#4a5568;font-size:14px;padding:14px 16px}.pns-article__content .tech-table tr:last-child td{border-bottom:none}.pns-article__content .tech-table tr:nth-child(2n){background-color:#fafbfc}.pns-article__content .tech-code{background:#1e293b;border-left:4px solid var(--primary-color);border-radius:8px;box-shadow:inset 0 2px 4px #0000001a;color:#f8fafc;font-family:Consolas,Monaco,Andale Mono,Ubuntu Mono,monospace;font-size:13.5px;line-height:1.6;margin:20px 0;overflow-x:auto;padding:18px 20px}.pns-article__content .tech-diagram{align-items:center;background:#fff;border:1px solid #e2e8f0;border-radius:12px;box-shadow:0 4px 15px #00000005;display:flex;flex-direction:column;margin:32px auto;max-width:680px;padding:24px}.pns-article__content .tech-diagram svg{height:auto;max-width:100%}.pns-article__content .tech-caption{align-items:center;color:#718096;display:flex;font-size:13px;font-style:italic;gap:6px;justify-content:center;margin-top:14px;text-align:center}.pns-article__content .tech-caption:before{color:var(--primary-color);content:"Diagram:";font-style:normal;font-weight:700}@media(max-width:768px){.pns-article__content .toc-list{gap:8px;grid-template-columns:1fr}.pns-article__content .tech-grid{grid-template-columns:1fr}.pns-article__content .tech-diagram{padding:12px}}.pns-article__content .tech-equation{align-items:center;color:#1e293b;display:flex;font-family:Times New Roman,Times,Georgia,serif;font-size:20px;justify-content:center;margin:24px 0;-webkit-user-select:none;-moz-user-select:none;user-select:none}.pns-article__content .tech-equation var{font-style:italic;font-weight:700}.pns-article__content .tech-equation sub{font-size:11px;font-style:italic;font-weight:400;margin-left:1px;vertical-align:-3px}.pns-article__content .tech-equation .fraction{align-items:center;display:inline-flex;flex-direction:column;margin:0 4px;vertical-align:middle}.pns-article__content .tech-equation .fraction-num{border-bottom:1.5px solid #475569;font-size:20px;font-style:italic;font-weight:700;line-height:1.1;padding:0 12px}.pns-article__content .tech-equation .fraction-den{align-items:center;display:flex;font-size:18px;gap:3px;line-height:1.1;padding:3px 12px 0}.pns-article__content .tech-equation .times-sign{color:#64748b;font-size:14px;font-weight:400;padding:0 2px}.pns-article__content .tech-equation .radical{align-items:center;display:inline-flex;vertical-align:middle}.pns-article__content .tech-equation .radical-symbol{font-size:22px;font-style:normal;font-weight:400;line-height:1;margin-top:-2px}.pns-article__content .tech-equation .radical-content{border-top:1.5px solid #475569;font-style:italic;line-height:1;margin-left:-2px;padding:1px 2px 0 1px}.pns-article__content var.math-var{font-family:Times New Roman,Times,Georgia,serif;font-style:italic;font-weight:700}.pns-article__content var.math-var sub{font-size:10px;font-style:italic;font-weight:400;margin-left:1px;vertical-align:-2px}