:root{
  --bg-ink:#080b0f;
  --bg-panel:#0e1319;
  --bg-panel-2:#121821;
  --bg-line:rgba(255,255,255,.08);
  --bg-line-soft:rgba(255,255,255,.05);
  --bg-text:#eef2f4;
  --bg-text-muted:#8b98a3;
  --bg-accent:#2fd98a;
  --bg-accent-dim:#1a8f5c;
  --bg-accent-soft:rgba(47,217,138,.12);
  --bg-cyan:#38d4d8;
  --bg-radius:14px;
  --bg-maxw:1180px;
}

*{box-sizing:border-box}
body.bg-body{
  margin:0;
  background:var(--bg-ink);
  color:var(--bg-text);
  font-family:"Noto Sans TC","PingFang TC","Microsoft JhengHei",-apple-system,BlinkMacSystemFont,sans-serif;
  line-height:1.6;
  overflow-x:hidden;
}
.bg-body a{color:inherit;text-decoration:none}
.bg-wrap{max-width:var(--bg-maxw);margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.bg-header{
  position:sticky;top:0;z-index:50;
  background:rgba(8,11,15,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--bg-line);
}
.bg-header-inner{
  max-width:var(--bg-maxw);margin:0 auto;padding:0 24px;
  height:64px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.bg-logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:18px;letter-spacing:.2px;color:var(--bg-text)}
.bg-logo-mark{
  width:30px;height:30px;border-radius:9px;
  background:linear-gradient(135deg,var(--bg-accent),var(--bg-cyan));
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:900;color:#04120b;flex:none;
}
.bg-nav{display:flex;align-items:center;gap:28px}
.bg-nav a{font-size:14px;color:var(--bg-text-muted);font-weight:500;transition:color .15s}
.bg-nav a:hover{color:var(--bg-text)}
.bg-header-cta{display:flex;align-items:center;gap:10px}

/* ---------- buttons ---------- */
.bg-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:10px;font-size:14px;font-weight:700;
  cursor:default;border:1px solid transparent;white-space:nowrap;
  transition:transform .15s,filter .15s;
}
.bg-btn-primary{background:linear-gradient(135deg,var(--bg-accent),#22c17a);color:#04120b}
.bg-btn-primary:hover{filter:brightness(1.08)}
.bg-btn-ghost{background:var(--bg-panel-2);color:var(--bg-text);border-color:var(--bg-line)}
.bg-btn-ghost:hover{border-color:rgba(255,255,255,.18)}
.bg-btn-outline{background:transparent;color:var(--bg-text);border-color:var(--bg-line)}
.bg-btn-lg{padding:14px 28px;font-size:15px}
.bg-btn-sm{padding:8px 16px;font-size:13px}

/* ---------- hero ---------- */
.bg-hero{
  position:relative;
  padding:88px 0 56px;
  background:
    radial-gradient(ellipse 900px 500px at 18% -10%, rgba(47,217,138,.14), transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 10%, rgba(56,212,216,.10), transparent 60%);
  border-bottom:1px solid var(--bg-line-soft);
}
.bg-hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.bg-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--bg-accent-soft);border:1px solid rgba(47,217,138,.25);
  font-size:12.5px;font-weight:700;color:var(--bg-accent);margin-bottom:22px;
}
.bg-hero h1{font-size:42px;font-weight:800;line-height:1.28;margin:0 0 20px;letter-spacing:-.5px}
.bg-hero h1 .bg-grad{background:linear-gradient(135deg,var(--bg-accent),var(--bg-cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.bg-hero p{font-size:16px;color:var(--bg-text-muted);margin:0 0 30px;max-width:520px}
.bg-hero-actions{display:flex;gap:12px;margin-bottom:34px;flex-wrap:wrap}
.bg-hero-check{display:flex;flex-wrap:wrap;gap:10px 22px}
.bg-hero-check span{font-size:13.5px;color:var(--bg-text-muted);display:inline-flex;align-items:center;gap:7px}
.bg-hero-check b{color:var(--bg-accent);font-weight:900}

.bg-hero-card{
  background:var(--bg-panel);border:1px solid var(--bg-line);border-radius:var(--bg-radius);
  padding:22px;box-shadow:0 30px 60px -20px rgba(0,0,0,.6);
}
.bg-hero-card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.bg-hero-card-head b{font-size:13px;color:var(--bg-text-muted);font-weight:700}
.bg-live-dot{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;color:var(--bg-accent);font-weight:700}
.bg-live-dot i{width:7px;height:7px;border-radius:50%;background:var(--bg-accent);display:inline-block;box-shadow:0 0 0 3px rgba(47,217,138,.2)}
.bg-hero-row{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-top:1px solid var(--bg-line-soft)}
.bg-hero-row:first-of-type{border-top:none}
.bg-hero-row-name{font-size:13.5px;font-weight:600}
.bg-hero-row-sub{font-size:11.5px;color:var(--bg-text-muted);margin-top:2px}
.bg-hero-badge{padding:5px 10px;border-radius:7px;font-size:11.5px;font-weight:800}
.bg-hero-badge.up{background:rgba(47,217,138,.14);color:var(--bg-accent)}
.bg-hero-badge.mid{background:rgba(56,212,216,.14);color:var(--bg-cyan)}

/* ---------- stats strip ---------- */
.bg-stats{border-bottom:1px solid var(--bg-line-soft);background:var(--bg-panel)}
.bg-stats-grid{
  max-width:var(--bg-maxw);margin:0 auto;padding:34px 24px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:28px;
}
.bg-stat-num{font-size:28px;font-weight:900;color:var(--bg-accent);letter-spacing:-.5px}
.bg-stat-label{font-size:13px;color:var(--bg-text-muted);margin-top:4px;font-weight:600}

/* ---------- section shared ---------- */
.bg-section{padding:80px 0}
.bg-section.alt{background:var(--bg-panel)}
.bg-section-head{text-align:center;max-width:640px;margin:0 auto 48px}
.bg-eyebrow-mini{font-size:12px;font-weight:800;letter-spacing:2px;color:var(--bg-cyan);margin-bottom:12px;display:block}
.bg-section-head h2{font-size:30px;font-weight:800;margin:0 0 12px;letter-spacing:-.3px}
.bg-section-head p{font-size:15px;color:var(--bg-text-muted);margin:0}
.bg-accent-text{color:var(--bg-accent)}

/* ---------- category grid ---------- */
.bg-cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.bg-cat-card{
  background:var(--bg-ink);border:1px solid var(--bg-line);border-radius:12px;
  padding:24px;transition:border-color .15s,transform .15s;
}
.bg-cat-card:hover{border-color:rgba(47,217,138,.3);transform:translateY(-2px)}
.bg-cat-icon{
  width:42px;height:42px;border-radius:10px;background:var(--bg-accent-soft);
  display:flex;align-items:center;justify-content:center;font-size:19px;margin-bottom:16px;
}
.bg-cat-card h3{font-size:15px;font-weight:700;margin:0 0 8px}
.bg-cat-card p{font-size:13px;color:var(--bg-text-muted);margin:0;line-height:1.65}

/* ---------- feature articles ---------- */
.bg-article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.bg-article-card{
  background:var(--bg-ink);border:1px solid var(--bg-line);border-radius:12px;
  overflow:hidden;transition:border-color .15s,transform .15s;
}
.bg-article-card:hover{border-color:rgba(47,217,138,.3);transform:translateY(-3px)}
.bg-article-thumb{height:150px;background:linear-gradient(135deg,var(--bg-panel-2),var(--bg-panel));position:relative}
.bg-article-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.bg-article-body{padding:18px}
.bg-article-tag{display:inline-block;font-size:11px;font-weight:800;color:var(--bg-cyan);background:rgba(56,212,216,.12);padding:4px 10px;border-radius:6px;margin-bottom:10px}
.bg-article-body h3{font-size:15px;font-weight:700;margin:0 0 8px;line-height:1.45}
.bg-article-body p{font-size:12.5px;color:var(--bg-text-muted);margin:0;line-height:1.6}
.bg-article-foot{display:flex;justify-content:space-between;align-items:center;margin-top:14px;font-size:11.5px;color:var(--bg-text-muted)}

/* ---------- twin bracket cards ---------- */
.bg-twin{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.bg-bracket{
  position:relative;background:var(--bg-ink);border:1px solid var(--bg-line);border-radius:var(--bg-radius);
  padding:30px;
}
.bg-bracket::before,.bg-bracket::after{
  content:"";position:absolute;width:18px;height:18px;border-color:var(--bg-accent);opacity:.6;
}
.bg-bracket::before{top:10px;left:10px;border-top:2px solid;border-left:2px solid;border-top-left-radius:6px}
.bg-bracket::after{bottom:10px;right:10px;border-bottom:2px solid;border-right:2px solid;border-bottom-right-radius:6px}
.bg-bracket-label{font-size:11.5px;font-weight:800;letter-spacing:1.5px;color:var(--bg-accent);margin-bottom:10px}
.bg-bracket h3{font-size:19px;font-weight:800;margin:0 0 12px}
.bg-bracket p{font-size:13.5px;color:var(--bg-text-muted);margin:0 0 20px;line-height:1.65}
.bg-metric-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.bg-metric{background:var(--bg-panel);border:1px solid var(--bg-line-soft);border-radius:9px;padding:12px;text-align:center}
.bg-metric-label{font-size:10.5px;color:var(--bg-text-muted);font-weight:700;margin-bottom:6px}
.bg-metric-val{font-size:16px;font-weight:800}

/* ---------- comparison table ---------- */
.bg-table{width:100%;border-collapse:collapse;background:var(--bg-ink);border:1px solid var(--bg-line);border-radius:12px;overflow:hidden}
.bg-table th{background:var(--bg-panel-2);text-align:left;padding:14px 18px;font-size:12.5px;color:var(--bg-text-muted);font-weight:800}
.bg-table td{padding:14px 18px;font-size:13.5px;border-top:1px solid var(--bg-line-soft)}
.bg-table tr.bg-highlight td{background:rgba(47,217,138,.06)}
.bg-table td.bg-name{font-weight:800;color:var(--bg-accent)}

/* ---------- steps ---------- */
.bg-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.bg-step{background:var(--bg-ink);border:1px solid var(--bg-line);border-radius:12px;padding:26px;position:relative}
.bg-step-num{font-size:34px;font-weight:900;color:rgba(255,255,255,.08);position:absolute;top:14px;right:18px}
.bg-step-icon{width:38px;height:38px;border-radius:9px;background:var(--bg-accent-soft);display:flex;align-items:center;justify-content:center;margin-bottom:14px;font-size:17px}
.bg-step h3{font-size:15px;font-weight:700;margin:0 0 8px}
.bg-step p{font-size:13px;color:var(--bg-text-muted);margin:0;line-height:1.6}

/* ---------- faq ---------- */
.bg-faq{max-width:760px;margin:0 auto}
.bg-faq-item{border-bottom:1px solid var(--bg-line-soft);padding:20px 0}
.bg-faq-q{font-size:15px;font-weight:700;margin-bottom:8px}
.bg-faq-a{font-size:13.5px;color:var(--bg-text-muted);line-height:1.75;margin:0}

/* ---------- newsletter ---------- */
.bg-newsletter{
  max-width:720px;margin:0 auto;text-align:center;
  background:var(--bg-panel);border:1px solid var(--bg-line);border-radius:18px;padding:48px 40px;
}
.bg-newsletter-icon{width:48px;height:48px;border-radius:12px;background:var(--bg-accent-soft);display:flex;align-items:center;justify-content:center;margin:0 auto 18px;font-size:22px}
.bg-newsletter h2{font-size:23px;font-weight:800;margin:0 0 10px}
.bg-newsletter p{font-size:13.5px;color:var(--bg-text-muted);margin:0 0 24px}
.bg-newsletter-form{display:flex;gap:10px;max-width:420px;margin:0 auto}
.bg-newsletter-form input{
  flex:1;padding:12px 16px;border-radius:9px;border:1px solid var(--bg-line);
  background:var(--bg-ink);color:var(--bg-text);font-size:13.5px;
}

/* ---------- footer ---------- */
.bg-footer{border-top:1px solid var(--bg-line-soft);background:var(--bg-panel);padding:56px 0 26px}
.bg-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.bg-footer-brand p{font-size:13px;color:var(--bg-text-muted);margin:14px 0 0;line-height:1.7;max-width:280px}
.bg-footer-col-title{font-size:12.5px;font-weight:800;color:var(--bg-text);margin-bottom:14px}
.bg-footer-link{display:block;font-size:13px;color:var(--bg-text-muted);margin-bottom:10px}
.bg-footer-bottom{border-top:1px solid var(--bg-line-soft);padding-top:22px;display:flex;justify-content:space-between;font-size:12px;color:var(--bg-text-muted);flex-wrap:wrap;gap:8px}

/* ---------- inner pages (about/contact/privacy/terms) ---------- */
.bg-page-hero{
  padding:64px 0 48px;text-align:center;border-bottom:1px solid var(--bg-line-soft);
  background:radial-gradient(ellipse 800px 400px at 50% -20%, rgba(47,217,138,.12), transparent 60%);
}
.bg-page-hero h1{font-size:34px;font-weight:800;margin:0 0 12px;letter-spacing:-.4px}
.bg-page-hero p{font-size:15px;color:var(--bg-text-muted);margin:0;max-width:560px;margin:0 auto}
.bg-breadcrumb{font-size:12.5px;color:var(--bg-text-muted);margin-bottom:18px}
.bg-breadcrumb a{color:var(--bg-text-muted)}
.bg-breadcrumb span.sep{margin:0 6px;opacity:.5}

.bg-content{max-width:760px;margin:0 auto;padding:56px 24px}
.bg-content h2{font-size:19px;font-weight:800;margin:36px 0 14px}
.bg-content h2:first-child{margin-top:0}
.bg-content p,.bg-content li{font-size:14.5px;line-height:1.85;color:var(--bg-text-muted);margin-bottom:14px}
.bg-content ul{padding-left:20px}
.bg-content strong{color:var(--bg-text);font-weight:700}
.bg-content a{color:var(--bg-accent);text-decoration:underline}
.bg-updated{font-size:12.5px;color:var(--bg-text-muted);margin-bottom:36px;display:block}

.bg-value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:0 auto;max-width:var(--bg-maxw)}
.bg-value-card{background:var(--bg-ink);border:1px solid var(--bg-line);border-radius:12px;padding:26px;text-align:center}
.bg-value-card .bg-cat-icon{margin:0 auto 16px}
.bg-value-card h3{font-size:15px;font-weight:700;margin:0 0 8px}
.bg-value-card p{font-size:13px;color:var(--bg-text-muted);margin:0;line-height:1.7}

.bg-contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;max-width:var(--bg-maxw);margin:0 auto;padding:56px 24px}
.bg-contact-info h2{font-size:22px;font-weight:800;margin:0 0 14px}
.bg-contact-info p{font-size:14.5px;color:var(--bg-text-muted);line-height:1.8;margin:0 0 24px}
.bg-contact-item{display:flex;gap:14px;align-items:flex-start;margin-bottom:20px}
.bg-contact-item .bg-cat-icon{margin:0;flex:none;width:38px;height:38px}
.bg-contact-item h4{font-size:14px;font-weight:700;margin:0 0 4px}
.bg-contact-item p{font-size:13px;color:var(--bg-text-muted);margin:0}
.bg-form{background:var(--bg-panel);border:1px solid var(--bg-line);border-radius:14px;padding:28px}
.bg-form label{display:block;font-size:12.5px;font-weight:700;color:var(--bg-text-muted);margin:0 0 8px}
.bg-form input,.bg-form textarea{
  width:100%;padding:11px 14px;border-radius:9px;border:1px solid var(--bg-line);
  background:var(--bg-ink);color:var(--bg-text);font-size:13.5px;margin-bottom:18px;font-family:inherit;
}
.bg-form textarea{resize:vertical;min-height:110px}

/* ---------- legacy article-page compat (article inner content unmodified, only frame restyled) ---------- */
.container{max-width:var(--bg-maxw);margin:0 auto;padding:0 24px}
.article-page{padding:40px 0 72px}
.breadcrumb{font-size:12.5px;color:var(--bg-text-muted);margin-bottom:24px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.breadcrumb a{color:var(--bg-text-muted)}
.breadcrumb-sep{opacity:.5}
.article-layout-grid{display:block;max-width:800px;margin:0 auto}
.article-header{margin-bottom:28px}
.tag{display:inline-block;font-size:11px;font-weight:800;padding:5px 12px;border-radius:7px;background:rgba(56,212,216,.12);color:var(--bg-cyan)}
.tag-1{background:rgba(56,212,216,.12);color:var(--bg-cyan)}
.article-h1{font-size:30px;font-weight:800;line-height:1.35;margin:14px 0 18px;letter-spacing:-.3px;color:var(--bg-text)}
.author-byline{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:12.5px;color:var(--bg-text-muted)}
.author-name{color:var(--bg-text);font-weight:700}
.author-sep{opacity:.5}
.article-hero-img{width:100%;border-radius:12px;margin-top:20px;display:block;max-height:400px;object-fit:cover}
.article-lead{font-size:16px;line-height:1.8;color:var(--bg-text);margin:24px 0;padding-bottom:20px;border-bottom:1px solid var(--bg-line-soft)}
.article-page p{font-size:14.5px;line-height:1.85;color:var(--bg-text-muted);margin-bottom:16px}
.article-page h2{font-size:19px;font-weight:800;color:var(--bg-text);margin:32px 0 14px}
.blog-banner{margin:20px 0}
.blog-banner img{width:100%;border-radius:12px;display:block;max-height:380px;object-fit:cover}
.body-figure{margin:28px 0}
.body-figure img{width:100%;border-radius:12px;display:block;max-height:380px;object-fit:cover}
.article-body a,.article-page a{color:var(--bg-accent)}
.qa-box{background:rgba(47,217,138,.08);border:1px solid rgba(47,217,138,.3);border-left:3px solid var(--bg-accent);border-radius:0 10px 10px 0;padding:16px 20px;margin:24px 0}
.qa-box-label{display:inline-block;background:var(--bg-accent);color:#04120b;font-size:10px;font-weight:800;padding:2px 8px;border-radius:10px;margin-bottom:10px;letter-spacing:.05em;text-transform:uppercase}
.qa-box p{color:var(--bg-text);margin:0}
.related-section{margin-top:36px;padding-top:26px;border-top:1px solid var(--bg-line-soft)}
.related-grid{display:grid;grid-template-columns:1fr;gap:12px;margin-top:16px}
.rel-card{background:var(--bg-ink);border:1px solid var(--bg-line);border-radius:10px;padding:16px;text-decoration:none;display:block;transition:border-color .15s}
.rel-card:hover{border-color:rgba(47,217,138,.3)}
.rel-cat{font-size:10px;color:var(--bg-cyan);font-weight:700;margin-bottom:8px;display:block;text-transform:uppercase}
.rel-title{font-size:13px;font-weight:700;color:var(--bg-text);line-height:1.45}
.author-bio-card{display:flex;gap:16px;align-items:flex-start;background:var(--bg-panel);border:1px solid var(--bg-line);border-radius:12px;padding:22px;margin-top:32px}
.author-bio-avatar{width:52px;height:52px;border-radius:50%;flex:none;background:var(--bg-accent-soft);display:flex;align-items:center;justify-content:center;font-size:22px}
.author-bio-name{font-size:14.5px;font-weight:700;color:var(--bg-text)}
.author-bio-title{font-size:12px;color:var(--bg-accent);font-weight:700;margin:2px 0 8px}
.author-bio-text{font-size:12.5px;color:var(--bg-text-muted);line-height:1.7;margin:0}
.faq-section{margin-top:36px}
.section-title{font-size:19px;font-weight:800;color:var(--bg-text)}
.faq-item{border-bottom:1px solid var(--bg-line-soft);padding:16px 0}
.faq-q{font-size:14.5px;font-weight:700;margin:0 0 8px;color:var(--bg-text)}
.faq-a{font-size:13.5px;color:var(--bg-text-muted);line-height:1.75;margin:0}
.card-meta{margin-bottom:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:10px;font-size:14px;font-weight:700;border:1px solid transparent;text-decoration:none}
.btn-primary{background:linear-gradient(135deg,var(--bg-accent),#22c17a);color:#04120b}
.btn-outline{background:transparent;color:var(--bg-text);border-color:var(--bg-line)}
.btn-lg{padding:14px 28px;font-size:15px}
.cta-banner{background:var(--bg-panel);border:1px solid var(--bg-line);border-radius:14px;padding:32px;text-align:center}
.cta-banner h2{font-size:20px;font-weight:800;margin:0 0 10px;color:var(--bg-text)}
.cta-banner p{font-size:13.5px;color:var(--bg-text-muted);margin:0 0 20px}
.gold-text{color:var(--bg-accent);font-style:normal}

/* ---------- legacy AI_INJECT article-card compat (blog list, unmodified injected markup) ---------- */
.articles-section{padding:56px 0}
.articles-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;max-width:var(--bg-maxw);margin:0 auto;padding:0 24px}
.article-card{background:var(--bg-ink);border:1px solid var(--bg-line);border-radius:12px;overflow:hidden;transition:border-color .15s,transform .15s}
.article-card:hover{border-color:rgba(47,217,138,.3);transform:translateY(-3px)}
.article-thumb{height:150px;background:linear-gradient(135deg,var(--bg-panel-2),var(--bg-panel))}
.article-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.article-body{padding:18px}
.article-meta{display:flex;align-items:center;gap:8px;margin-bottom:10px;font-size:11px}
.article-cat{background:rgba(56,212,216,.12);color:var(--bg-cyan);font-weight:800;padding:4px 10px;border-radius:6px}
.article-date,.article-read{color:var(--bg-text-muted)}
.article-card h2{font-size:14.5px;font-weight:700;line-height:1.45;margin:0 0 8px;color:var(--bg-text)}
.article-excerpt{font-size:12.5px;color:var(--bg-text-muted);line-height:1.6;margin:0 0 12px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.article-link{font-size:12px;font-weight:700;color:var(--bg-accent);text-decoration:none}
.article-link:hover{text-decoration:underline}

@media (max-width: 980px){
  .articles-grid{grid-template-columns:1fr}
  .bg-value-grid{grid-template-columns:1fr}
  .bg-contact-grid{grid-template-columns:1fr}
  .bg-hero-grid{grid-template-columns:1fr}
  .bg-stats-grid{grid-template-columns:repeat(2,1fr)}
  .bg-cat-grid{grid-template-columns:repeat(2,1fr)}
  .bg-article-grid{grid-template-columns:1fr}
  .bg-twin{grid-template-columns:1fr}
  .bg-steps{grid-template-columns:1fr}
  .bg-footer-grid{grid-template-columns:1fr 1fr}
  .bg-nav{display:none}
}