.cach-bat-dau-voi-le-tiet-am-lich-article{--vts-accent-primary: #b91c1c;--vts-accent-secondary: #991b1b;--vts-accent-tertiary: #b45309;--vts-accent-light: #fee2e2;--vts-accent-subtle: #fef2f2;--vts-text-main: #1f2937;--vts-text-muted: #4b5563;--vts-border: #fecaca;--vts-border-subtle: #fff5f5;--vts-shadow: 0 4px 18px rgba(185, 28, 28, .08)}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-answer{background:linear-gradient(135deg,#fef2f2 0%,#fee2e2 100%);border-left:4px solid var(--vts-accent-primary);border-radius:0 12px 12px 0;padding:1.5rem;margin-bottom:2rem;box-shadow:0 2px 10px #b91c1c0f}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-answer-title{color:var(--vts-accent-secondary);font-weight:700;font-size:1.15rem;margin-bottom:.75rem;display:flex;align-items:center;gap:.5rem}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-answer-content{color:var(--vts-text-main);font-size:1.05rem;line-height:1.75}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-byline{display:flex;align-items:center;flex-wrap:wrap;gap:.75rem;padding:.75rem 1rem;background-color:var(--vts-accent-subtle);border:1px solid var(--vts-border);border-radius:8px;font-size:.875rem;color:var(--vts-accent-primary);margin-bottom:1.5rem}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-toc{background-color:var(--vts-accent-subtle);border:1px solid var(--vts-border);border-radius:12px;padding:1.25rem 1.5rem;margin-bottom:2rem}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-toc-title{font-weight:700;color:var(--vts-accent-secondary);font-size:1.1rem;margin-bottom:.75rem}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-toc-list{list-style:none;padding-left:0;margin:0;display:grid;grid-template-columns:1fr;gap:.5rem}@media (min-width: 640px){.cach-bat-dau-voi-le-tiet-am-lich-article .vts-toc-list{grid-template-columns:1fr 1fr}}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-toc-link{color:var(--vts-accent-primary);text-decoration:none;display:flex;align-items:center;gap:.5rem;padding:.35rem .5rem;border-radius:6px;transition:all .2s ease;font-size:.95rem}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-toc-link:hover{background-color:var(--vts-accent-light);color:var(--vts-accent-secondary)}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-table-wrapper{overflow-x:auto;margin:2rem 0;border-radius:10px;box-shadow:var(--vts-shadow);border:1px solid var(--vts-border);background-color:#fff}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-table{width:100%;border-collapse:collapse;text-align:left;font-size:.95rem}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-table caption{padding:1rem;font-weight:700;font-size:1.05rem;color:var(--vts-accent-secondary);background-color:var(--vts-accent-subtle);border-bottom:2px solid var(--vts-border);text-align:left}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-table th[scope=col]{background-color:#b91c1c;color:#fff;padding:.85rem 1rem;font-weight:600;border:1px solid #991b1b}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-table th[scope=row]{background-color:#fff5f5;color:var(--vts-accent-secondary);font-weight:600;padding:.85rem 1rem;border:1px solid var(--vts-border);white-space:nowrap}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-table td{padding:.85rem 1rem;border:1px solid var(--vts-border);color:var(--vts-text-main);line-height:1.6}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-table tbody tr:nth-child(2n) td{background-color:#fffafb}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-table tbody tr:hover td{background-color:#fee2e2}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-figure{margin:2.25rem 0;text-align:center}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-figure img{width:100%;max-width:720px;height:auto;border-radius:12px;box-shadow:0 4px 16px #00000014;border:1px solid var(--vts-border);margin:0 auto;display:block}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-figure figcaption{font-size:.9rem;color:var(--vts-text-muted);margin-top:.75rem;font-style:italic;line-height:1.5;padding:0 1rem}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-roadmap{background-color:var(--vts-accent-subtle);border:1px solid var(--vts-border);border-radius:12px;padding:1.75rem;margin:2.5rem 0}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-roadmap-title{color:var(--vts-accent-secondary);font-weight:700;font-size:1.2rem;margin-bottom:1.25rem;display:flex;align-items:center;gap:.5rem}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-roadmap-step{display:flex;gap:1.25rem;margin-bottom:1.25rem;background-color:#fff;padding:1.25rem;border-radius:10px;border:1px solid var(--vts-border);box-shadow:0 2px 6px #b91c1c0a}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-roadmap-number{flex-shrink:0;width:36px;height:36px;border-radius:50%;background-color:var(--vts-accent-primary);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:1.1rem}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-roadmap-body h4{margin:0 0 .5rem;color:var(--vts-accent-secondary);font-size:1.05rem}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-roadmap-body p{margin:0;color:var(--vts-text-muted);font-size:.95rem;line-height:1.6}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-caution{background-color:#fffbeb;border-left:4px solid #d97706;border-radius:0 10px 10px 0;padding:1.25rem 1.5rem;margin:2rem 0;box-shadow:0 2px 8px #d977060f}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-caution-title{color:#92400e;font-weight:700;font-size:1.05rem;margin-bottom:.5rem;display:flex;align-items:center;gap:.5rem}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-caution-content{color:#78350f;font-size:.95rem;line-height:1.65}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-faq{margin:2.5rem 0}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-faq-item{border:1px solid var(--vts-border);border-radius:10px;margin-bottom:.85rem;background-color:#fff;overflow:hidden;transition:all .2s ease}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-faq-item:hover{border-color:var(--vts-accent-primary);box-shadow:0 2px 10px #b91c1c0d}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-faq-question{padding:1.15rem 1.25rem;font-weight:700;color:var(--vts-accent-secondary);font-size:1.05rem;cursor:pointer;background-color:#fef2f2;border-bottom:1px solid transparent;display:flex;justify-content:space-between;align-items:center}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-faq-question:after{content:"▼";font-size:.75rem;color:var(--vts-accent-primary);transition:transform .2s ease}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-faq-item[open] .vts-faq-question:after{transform:rotate(180deg)}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-faq-item[open] .vts-faq-question{border-bottom-color:var(--vts-border);background-color:var(--vts-accent-subtle)}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-faq-answer{padding:1.25rem;color:var(--vts-text-main);line-height:1.7;font-size:.95rem}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-internal-links{background-color:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;padding:1.5rem;margin:2.5rem 0}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-internal-links h3{color:var(--vts-accent-secondary);font-size:1.1rem;margin-top:0;margin-bottom:1rem}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-link-grid{display:grid;grid-template-columns:1fr;gap:.75rem}@media (min-width: 640px){.cach-bat-dau-voi-le-tiet-am-lich-article .vts-link-grid{grid-template-columns:1fr 1fr}}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-nav-card{display:block;padding:.85rem 1rem;background-color:#fff;border:1px solid var(--vts-border);border-radius:8px;color:var(--vts-accent-primary);text-decoration:none;font-weight:500;transition:all .2s ease}.cach-bat-dau-voi-le-tiet-am-lich-article .vts-nav-card:hover{background-color:var(--vts-accent-light);border-color:var(--vts-accent-primary);color:var(--vts-accent-secondary);transform:translateY(-2px)}