:root {
  --bg: #0b111a;
  --card: #0f1722;
  --soft: #141c29;
  --text: #e6edf3;
  --muted: #a5b1c2;
  --primary: #2e7cf6;
  --primary-900: #1d4ed8;
  --accent: #22d3ee;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --shadow-soft: 0 6px 20px rgba(0,0,0,.25);
  --maxw: 1160px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(1200px 600px at 80% -10%, rgba(46,124,246,.25), transparent 40%),
              radial-gradient(1000px 600px at -10% -20%, rgba(34,211,238,.18), transparent 50%),
              var(--bg);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.section.alt { background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,0)); }
.section-title { margin: 0 0 14px; font-size: 26px; letter-spacing: .2px; }
.section-desc { margin: 0 0 28px; color: var(--muted); }
.small { color: var(--muted); font-size: 12px; }

.btn { display: inline-flex; align-items: center; gap: 10px; height: 44px; padding: 0 18px; border-radius: 12px; border: 1px solid transparent; text-decoration: none; color: #0b111a; background: #fff; box-shadow: var(--shadow-soft); transition: transform .15s ease, box-shadow .2s ease, background .2s ease; }
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn:active { transform: translateY(0); }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-900)); color: #fff; }
.btn-ghost { color: var(--text); background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.12); }

.site-header { position: sticky; top: 0; z-index: 50; backdrop-filter: saturate(160%) blur(10px); background: rgba(11,17,26,.6); border-bottom: 1px solid rgba(255,255,255,.06); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; }
.brand-mark { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 8px; background: linear-gradient(135deg, var(--primary), var(--accent)); color: #0b111a; font-weight: 900; }
.brand-text { letter-spacing: .2px; }
.main-nav { display: none; gap: 18px; }
.main-nav a { color: var(--muted); text-decoration: none; }
.main-nav a:hover { color: var(--text); }
.header-cta { display: flex; gap: 10px; }

@media (min-width: 900px) { .main-nav { display: flex; } }

.hero { padding: 72px 0 36px; position: relative; }
.hero-inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 36px; align-items: center; }
.hero-copy h1 { margin: 0 0 10px; font-size: 40px; letter-spacing: .2px; }
.subtitle { margin: 0 0 14px; color: var(--muted); font-size: 16px; }
.hero-highlights { display: grid; gap: 8px; margin: 0 0 18px; padding: 0; list-style: none; }
.hero-highlights li { position: relative; padding-left: 22px; color: #d7e0ea; }
.hero-highlights li::before { content: ""; position: absolute; left: 0; top: 8px; width: 10px; height: 10px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--primary)); box-shadow: 0 0 0 4px rgba(46,124,246,.12); }
.hero-cta { display: flex; gap: 10px; margin-bottom: 8px; }
.note { color: var(--muted); font-size: 12px; }

.hero-media { display: grid; place-items: center; }
.device-card { width: 320px; border-radius: var(--radius); background: linear-gradient(180deg, #0f1722, #0b111a); border: 1px solid rgba(255,255,255,.06); box-shadow: var(--shadow); overflow: hidden; }
.device-top { display: flex; gap: 6px; padding: 10px; background: rgba(255,255,255,.02); border-bottom: 1px solid rgba(255,255,255,.06); }
.led { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,.1); }
.led-on { background: linear-gradient(180deg, #7CFC00, #20c997); box-shadow: 0 0 10px #20c997; }
.device-body { padding: 30px 24px; font-size: 64px; font-weight: 800; letter-spacing: 4px; text-align: center; background: linear-gradient(180deg, rgba(46,124,246,.1), transparent 50%); }
.device-ports { padding: 14px 18px 18px; color: var(--muted); font-size: 12px; text-align: center; }

.feature-grid { display: grid; grid-template-columns: repeat(1, minmax(0,1fr)); gap: 14px; }
.feature-card { padding: 18px; border-radius: var(--radius-sm); background: var(--card); border: 1px solid rgba(255,255,255,.06); box-shadow: var(--shadow-soft); }
.feature-card h3 { margin: 0 0 6px; font-size: 18px; }
.feature-card p { margin: 0; color: var(--muted); }

@media (min-width: 680px) { .feature-grid { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (min-width: 1000px) { .feature-grid { grid-template-columns: repeat(3, minmax(0,1fr)); } }

.steps { display: grid; grid-template-columns: repeat(1, minmax(0,1fr)); gap: 14px; }
.step { position: relative; padding: 18px 18px 18px 56px; border-radius: var(--radius-sm); background: var(--card); border: 1px solid rgba(255,255,255,.06); box-shadow: var(--shadow-soft); }
.step-num { position: absolute; left: 14px; top: 18px; width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; font-weight: 700; background: linear-gradient(135deg, var(--primary), var(--accent)); color: #0b111a; }
.step h3 { margin: 0 0 6px; font-size: 18px; }
.step p { margin: 0; color: var(--muted); }
@media (min-width: 900px) { .steps { grid-template-columns: repeat(4, minmax(0,1fr)); } }

.scenario-grid { display: grid; grid-template-columns: repeat(1, minmax(0,1fr)); gap: 14px; }
.scenario-card { padding: 18px; border-radius: var(--radius-sm); background: linear-gradient(180deg, var(--card), rgba(255,255,255,.02)); border: 1px solid rgba(255,255,255,.06); box-shadow: var(--shadow-soft); }
.scenario-card h3 { margin: 0 0 6px; font-size: 18px; }
.scenario-card p { margin: 0; color: var(--muted); }
@media (min-width: 900px) { .scenario-grid { grid-template-columns: repeat(3, minmax(0,1fr)); } }

.compare-grid { display: grid; grid-template-columns: repeat(1, minmax(0,1fr)); gap: 14px; }
.compare-item { padding: 18px; border-radius: var(--radius-sm); background: var(--soft); border: 1px dashed rgba(255,255,255,.12); }
.compare-item h3 { margin: 0 0 6px; font-size: 18px; }
.compare-item p { margin: 0; color: var(--muted); }
@media (min-width: 900px) { .compare-grid { grid-template-columns: repeat(3, minmax(0,1fr)); } }

.specs { display: grid; grid-template-columns: repeat(1, minmax(0,1fr)); gap: 18px; padding: 14px; border-radius: var(--radius-sm); background: var(--card); border: 1px solid rgba(255,255,255,.06); box-shadow: var(--shadow-soft); }
.spec-col dt { color: #d7e0ea; font-weight: 700; margin-top: 14px; }
.spec-col dd { margin: 6px 0 0 0; color: var(--muted); }
@media (min-width: 900px) { .specs { grid-template-columns: repeat(2, minmax(0,1fr)); } }

.faq details { border: 1px solid rgba(255,255,255,.08); border-radius: 12px; background: var(--card); box-shadow: var(--shadow-soft); padding: 12px 14px; margin-bottom: 10px; }
.faq summary { cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary { position: relative; padding-right: 26px; }
.faq summary::after { content: ""; position: absolute; right: 4px; top: 50%; width: 10px; height: 10px; border-right: 2px solid #9fb3ca; border-bottom: 2px solid #9fb3ca; transform: translateY(-50%) rotate(-45deg); transition: transform .2s ease; }
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.answer { margin-top: 8px; color: var(--muted); }

.support-grid { display: grid; grid-template-columns: repeat(1, minmax(0,1fr)); gap: 14px; }
.support-card { padding: 18px; border-radius: var(--radius-sm); background: var(--card); border: 1px solid rgba(255,255,255,.06); box-shadow: var(--shadow-soft); }
.support-card h3 { margin: 0 0 6px; font-size: 18px; }
.support-card p { margin: 0; color: var(--muted); }
@media (min-width: 900px) { .support-grid { grid-template-columns: repeat(3, minmax(0,1fr)); } }

.site-footer { border-top: 1px solid rgba(255,255,255,.08); background: rgba(255,255,255,.02); padding: 32px 0; }
.footer-inner { display: grid; grid-template-columns: 1fr; gap: 24px; }
.footer-brand { display: grid; gap: 6px; align-content: start; }
.footer-cols { display: grid; grid-template-columns: repeat(1, minmax(0,1fr)); gap: 20px; }
.footer-cols h4 { margin: 0 0 8px; font-size: 14px; color: #d7e0ea; }
.footer-cols ul { margin: 0; padding: 0; list-style: none; }
.footer-cols a { color: var(--muted); text-decoration: none; }
.footer-cols a:hover { color: var(--text); }

@media (min-width: 900px) {
  .footer-inner { grid-template-columns: .9fr 1.1fr; }
  .footer-cols { grid-template-columns: repeat(3, minmax(0,1fr)); }
}

/* Small screen tweaks */
@media (max-width: 720px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-copy h1 { font-size: 32px; }
  .device-card { width: 100%; max-width: 360px; }
} 

.product_img img{
  width: 100%;
}