:root{--brand-navy:#374151;--brand-navy-dark:#1f2937;--brand-orange:#f97316;--brand-orange-light:#fb923c;--brand-orange-dark:#ea580c;--brand-blue:#3b82f6;--ink:#1f2937;--muted:#6b7280;--line:#e5e7eb;--bg-soft:#f5f8fb;--bg-warm:#f8f7f4}html{scroll-behavior:smooth}body{color:var(--ink);background:var(--bg-warm);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}body:before{content:"";display:block;height:3px;background:linear-gradient(90deg,var(--brand-orange-dark),var(--brand-orange),var(--brand-orange-light))}img,video{max-width:100%;height:auto}.hero-gradient{background:radial-gradient(1000px 500px at 80% -10%,rgba(249,115,22,.35),transparent 60%),radial-gradient(700px 400px at 15% 110%,rgba(249,115,22,.15),transparent 55%),linear-gradient(135deg,#1f2937,#374151 50%,#4b5563)}.section-bar{display:inline-block;width:48px;height:4px;border-radius:2px;background:var(--brand-orange)}.md-body h2{font-size:1.35rem;font-weight:700;color:var(--brand-navy);margin:1.6rem 0 .75rem;padding-left:12px;border-left:4px solid var(--brand-orange)}.md-body h3{font-size:1.15rem;font-weight:600;color:var(--brand-navy);margin:1.2rem 0 .5rem}.md-body p,.md-body ul{margin:.6rem 0}.md-body ul{padding-left:1.4rem}.md-body li{margin:.3rem 0}.md-body strong{color:var(--brand-orange-dark);font-weight:600}.spec-table{width:100%;border-collapse:collapse;margin:1rem 0;font-size:.9rem}.spec-table th{background:#fff7ed;color:var(--brand-navy);font-weight:600;text-align:left;padding:10px 14px;border:1px solid #ffedd5;width:35%}.spec-table td{padding:10px 14px;border:1px solid #e5e7eb;background:#fff}.card-hover{transition:all .25s ease}.card-hover:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(249,115,22,.12)}.badge-orange{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.75rem;font-weight:500;background:#fff7ed;color:var(--brand-orange-dark);border:1px solid #fed7aa}.btn-primary{display:inline-block;padding:12px 28px;border-radius:999px;background:linear-gradient(135deg,var(--brand-orange),var(--brand-orange-dark));color:#fff;font-weight:600;transition:all .25s ease;box-shadow:0 4px 14px rgba(249,115,22,.3)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(249,115,22,.4)}