/* Thanh phan rieng cua bai viet blog Qlight Viet Nam.
   Rut tu cac khoi <style> cua 10 bai tren qlight.vn, da bo nhung rule trung
   voi site.css. Bien mau cua ban cu duoc anh xa sang he mau portal ngay duoi
   day, nen cac bai viet theo dung tong mau va do bo goc cua portal. */
.article-body{
  --color-ink:var(--ink); --color-text:var(--ink-soft); --color-muted:var(--muted);
  --color-line:var(--line); --color-line-soft:var(--line-soft);
  --color-surface:var(--white); --color-soft:var(--surface-2);
  --color-soft-blue:var(--blue-tint); --color-navy:var(--blue-deep);
  --color-navy-2:var(--blue-dark); --color-blue:var(--blue);
  --color-blue-dark:var(--blue-dark); --color-cyan:var(--t-smart);
  --color-green:var(--t-led); --color-amber:#b8480b; --color-red:var(--magenta);
  --gradient-blue:linear-gradient(135deg,var(--blue-dark) 0%,var(--blue) 55%,var(--t-smart) 100%);
  --gradient-soft:linear-gradient(135deg,rgba(13,91,171,.07) 0%,rgba(15,123,189,.12) 100%);
  --shadow-premium:var(--shadow); --shadow-soft:var(--shadow); --shadow-hover:var(--shadow);
  --radius-card:var(--radius); --radius-control:var(--radius);
  --transition:.2s ease;
}
/* bai viet co bang, grid so sanh va thang do -> can rong hon 74ch mac dinh */
.article-body.article-rich{max-width:900px}
.article-body.article-rich h4{margin:22px 0 8px;font-size:1.02rem;color:var(--ink)}

.article-highlight{padding: 20px 22px; border-left: 3px solid var(--color-blue); background: rgba(0,114,206,.05); border-radius: 0 var(--radius-card) var(--radius-card) 0; margin: 24px 0;}
.article-highlight p{margin: 0; font-size: 15px;}
.sidebar-card{padding: 22px; border: 1px solid var(--color-line-soft); border-radius: var(--radius-card); background: var(--color-surface); box-shadow: var(--shadow-soft);}
.sidebar-card h3{margin: 0 0 12px; color: var(--color-ink); font-size: 17px;}
.sidebar-card p{margin: 0 0 14px; color: var(--color-text); font-size: 14px; line-height: 1.7;}
.sidebar-card ul{margin: 0 0 16px; padding-left: 18px;}
.sidebar-card li{font-size: 14px; color: var(--color-text); margin-bottom: 5px;}
.related-articles{display: grid; gap: 12px; margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--color-line-soft);}
.related-articles h3{margin: 0 0 16px; font-size: 20px; color: var(--color-ink);}
.related-link{display: flex; gap: 12px; align-items: center; padding: 14px 16px; border: 1px solid var(--color-line-soft); border-radius: var(--radius-card); color: var(--color-ink); transition: border-color var(--transition), box-shadow var(--transition);}
.related-link:hover{color: var(--color-ink); border-color: rgba(0,114,206,.28); box-shadow: var(--shadow-soft);}
.related-link span{font-size: 14px; font-weight: 700; color: var(--color-blue);}
.related-link p{margin: 2px 0 0; font-size: 13px; color: var(--color-muted);}
.article-highlight{padding:20px 22px;border-left:3px solid var(--color-blue);background:rgba(0,114,206,.05);border-radius:0 var(--radius-card) var(--radius-card) 0;margin:24px 0}
.article-highlight p{margin:0;font-size:15px}
.ip-badge{display:inline-block;padding:3px 9px;border-radius:4px;font-weight:800;font-size:13px;margin-right:4px}
.sidebar-card{padding:22px;border:1px solid var(--color-line-soft);border-radius:var(--radius-card);background:var(--color-surface);box-shadow:var(--shadow-soft)}
.sidebar-card h3{margin:0 0 12px;color:var(--color-ink);font-size:17px}
.sidebar-card p{margin:0 0 14px;color:var(--color-text);font-size:14px;line-height:1.7}
.sidebar-card ul{margin:0 0 16px;padding-left:18px}
.sidebar-card li{font-size:14px;color:var(--color-text);margin-bottom:5px}
.related-articles{display:grid;gap:12px;margin-top:48px;padding-top:32px;border-top:1px solid var(--color-line-soft)}
.related-articles h3{margin:0 0 16px;font-size:20px;color:var(--color-ink)}
.related-link{display:flex;gap:12px;align-items:center;padding:14px 16px;border:1px solid var(--color-line-soft);border-radius:var(--radius-card);color:var(--color-ink);transition:border-color var(--transition),box-shadow var(--transition)}
.related-link:hover{color:var(--color-ink);border-color:rgba(0,114,206,.28);box-shadow:var(--shadow-soft)}
.related-link span{font-size:14px;font-weight:700;color:var(--color-blue)}
.related-link p{margin:2px 0 0;font-size:13px;color:var(--color-muted)}
.db-scale{display:grid;gap:8px;margin:24px 0}
.db-row{display:flex;align-items:center;gap:12px}
.db-bar{height:28px;border-radius:4px;display:flex;align-items:center;padding-left:10px;font-size:13px;font-weight:800;color:#fff;transition:width .3s}
.db-label{font-size:13px;color:var(--color-muted);white-space:nowrap;min-width:120px}
.sounder-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:24px 0}
.sounder-card{padding:20px;border-radius:var(--radius-card);border:1px solid var(--color-line-soft);background:var(--color-surface)}
.sounder-card h4{margin:0 0 8px;font-size:16px;color:var(--color-ink)}
.sounder-card .db-badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:800;margin-bottom:8px}
.sounder-card p{margin:0;font-size:13px;color:var(--color-text);line-height:1.6}
@media(max-width:960px){.sounder-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.sounder-grid{grid-template-columns:1fr}}
.compare-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:24px 0}
.compare-card{padding:22px;border-radius:var(--radius-card);border:1px solid var(--color-line-soft)}
.compare-card h3{margin:0 0 14px;font-size:18px}
.compare-card ul{margin:0;padding-left:18px}
.compare-card li{font-size:14px;color:var(--color-text);margin-bottom:7px;line-height:1.55}
.verdict-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:24px 0}
.verdict-card{padding:20px;border-radius:var(--radius-card);background:var(--color-surface);border:1px solid var(--color-line-soft)}
.verdict-card h4{margin:0 0 8px;color:var(--color-ink);font-size:16px}
.verdict-card p{margin:0;font-size:14px;color:var(--color-text);line-height:1.6}
@media(max-width:960px){.compare-cards,.verdict-grid{grid-template-columns:1fr}}
.article-warning{padding:20px 22px;border-left:3px solid #e5484d;background:rgba(229,72,77,.05);border-radius:0 var(--radius-card) var(--radius-card) 0;margin:24px 0}
.article-warning p{margin:0;font-size:15px}
.light-type-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:24px 0}
.light-type-card{padding:22px;border-radius:var(--radius-card);border:1px solid var(--color-line-soft);background:var(--color-surface)}
.light-type-card .color-dot{width:40px;height:40px;border-radius:50%;margin-bottom:14px}
.light-type-card h4{margin:0 0 8px;font-size:17px;color:var(--color-ink)}
.light-type-card p{margin:0;font-size:14px;color:var(--color-text);line-height:1.65}
.install-steps{display:grid;gap:16px;margin:24px 0;counter-reset:step}
.install-step{display:grid;grid-template-columns:48px 1fr;gap:16px;align-items:start;padding:18px;border-radius:var(--radius-card);border:1px solid var(--color-line-soft);background:var(--color-surface)}
.install-step-num{width:48px;height:48px;border-radius:50%;background:var(--gradient-blue);color:#fff;font-weight:800;font-size:18px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.install-step h4{margin:0 0 4px;font-size:16px;color:var(--color-ink)}
.install-step p{margin:0;font-size:14px;color:var(--color-text);line-height:1.6}
@media(max-width:960px){.light-type-grid{grid-template-columns:1fr}}
.andon-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:24px 0}
.andon-step{padding:16px;border:1px solid var(--color-line-soft);border-radius:var(--radius-card);background:#fff;text-align:center}
.andon-step .num{display:inline-flex;width:32px;height:32px;align-items:center;justify-content:center;border-radius:50%;background:var(--gradient-blue);color:#fff;font-weight:800;font-size:15px;margin-bottom:10px}
.andon-step h4{margin:0 0 6px;font-size:14px;color:var(--color-ink)}
.andon-step p{margin:0;font-size:13px;color:var(--color-muted);line-height:1.5}
@media(max-width:960px){.andon-flow{grid-template-columns:repeat(2,1fr)}}
.mount-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:24px 0}
.mount-card{padding:18px;border-radius:var(--radius-card);border:1px solid var(--color-line-soft);background:var(--color-surface);text-align:center}
.mount-card .mount-icon{font-size:32px;margin-bottom:10px}
.mount-card h4{margin:0 0 6px;font-size:15px;color:var(--color-ink)}
.mount-card p{margin:0;font-size:13px;color:var(--color-text);line-height:1.55}
.steps-numbered{display:grid;gap:20px;margin:24px 0;counter-reset:step}
.step-item{display:grid;grid-template-columns:56px 1fr;gap:16px;align-items:start}
.step-num{width:56px;height:56px;border-radius:50%;background:var(--gradient-blue);color:#fff;font-weight:900;font-size:20px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.step-content h4{margin:0 0 6px;font-size:17px;color:var(--color-ink)}
.step-content p{margin:0;font-size:14px;color:var(--color-text);line-height:1.65}
.wire-table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14px;border:1px solid var(--color-line-soft);border-radius:var(--radius-card);overflow:hidden}
.wire-table th{background:var(--color-soft);padding:10px 14px;text-align:left;font-weight:800;color:var(--color-ink);border-bottom:1px solid var(--color-line)}
.wire-table td{padding:10px 14px;border-bottom:1px solid var(--color-line-soft);color:var(--color-text)}
.wire-table tr:last-child td{border-bottom:none}
.wire-dot{display:inline-block;width:16px;height:16px;border-radius:50%;vertical-align:middle;margin-right:6px}
.mistake-list{display:grid;gap:14px;margin:24px 0}
.mistake-item{display:grid;grid-template-columns:32px 1fr;gap:12px;padding:16px;border-radius:var(--radius-card);background:var(--color-surface);border:1px solid var(--color-line-soft);align-items:start}
.mistake-num{width:32px;height:32px;border-radius:50%;background:#fee2e2;color:#dc2626;font-weight:900;font-size:14px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.mistake-content h4{margin:0 0 4px;font-size:15px;color:var(--color-ink)}
.mistake-content p{margin:0;font-size:13px;color:var(--color-text);line-height:1.6}
@media(max-width:960px){.mount-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.mount-grid{grid-template-columns:1fr}.step-item{grid-template-columns:42px 1fr}}
.mistake-block{margin:32px 0;border:1px solid var(--color-line-soft);border-radius:var(--radius-card);overflow:hidden;background:var(--color-surface)}
.mistake-header{display:flex;gap:16px;align-items:center;padding:20px 22px;background:linear-gradient(135deg,#fee2e2,#fef2f2);border-bottom:1px solid #fecaca}
.mistake-header .mistake-badge{width:44px;height:44px;border-radius:50%;background:#dc2626;color:#fff;font-weight:900;font-size:20px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.mistake-header h3{margin:0;font-size:20px;color:#991b1b}
.mistake-body{padding:20px 22px}
.mistake-body p{margin:0 0 14px;color:var(--color-text);font-size:15px;line-height:1.75}
.mistake-body p:last-child{margin:0}
.mistake-fix{padding:14px 18px;border-left:3px solid #16a34a;background:rgba(22,163,74,.06);border-radius:0 8px 8px 0;margin-top:16px}
.mistake-fix strong{color:#15803d}
.mistake-fix p{margin:0;font-size:14px;color:var(--color-text)}
.checklist-card{padding:22px;border-radius:var(--radius-card);background:linear-gradient(135deg,rgba(0,114,206,.04),rgba(0,170,220,.06));border:1px solid rgba(0,114,206,.15);margin:32px 0}
.checklist-card h3{margin:0 0 16px;font-size:20px;color:var(--color-ink)}
.checklist-items{display:grid;grid-template-columns:1fr 1fr;gap:10px 32px}
.checklist-item{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--color-text)}
.checklist-item::before{content:"✅";flex-shrink:0;font-size:14px}
@media(max-width:600px){.checklist-items{grid-template-columns:1fr}}
.integration-flow{display:flex;gap:0;margin:28px 0;align-items:center;flex-wrap:wrap}
.flow-node{flex:1;min-width:110px;padding:16px 12px;border-radius:var(--radius-card);text-align:center;font-size:13px;font-weight:800;color:#fff}
.flow-arrow{font-size:24px;color:var(--color-muted);padding:0 4px;flex-shrink:0}
.protocol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:24px 0}
.protocol-card{padding:16px;border-radius:var(--radius-card);border:1px solid var(--color-line-soft);background:var(--color-surface);text-align:center}
.protocol-card h4{margin:0 0 6px;font-size:15px;color:var(--color-ink)}
.protocol-card p{margin:0;font-size:12px;color:var(--color-muted);line-height:1.5}
.use-case-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:24px 0}
.use-case{padding:18px;border-radius:var(--radius-card);background:var(--color-surface);border:1px solid var(--color-line-soft)}
.use-case h4{margin:0 0 8px;font-size:15px;color:var(--color-ink)}
.use-case p{margin:0;font-size:13px;color:var(--color-text);line-height:1.6}
@media(max-width:960px){.protocol-grid{grid-template-columns:1fr 1fr}.use-case-grid{grid-template-columns:1fr}}
@media(max-width:600px){.integration-flow{flex-direction:column}.flow-arrow{transform:rotate(90deg)}.protocol-grid{grid-template-columns:1fr}}
.article-highlight p,.article-warning p{margin:0;font-size:15px}
.zone-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:24px 0}
.zone-card{padding:18px;border-radius:var(--radius-card);text-align:center}
.zone-card h4{margin:8px 0 6px;font-size:16px}
.zone-card p{margin:0;font-size:13px;color:var(--color-text);line-height:1.5}
@media(max-width:960px){.zone-grid{grid-template-columns:1fr}}