:root{
  --primary:#204ECF;
  --accent:#FFCA28;
  --bg:#101827;
  --text:#F8FAFC;
  --accent2:#4F83FF;
  --surface:#16213D;
  --surface-2:#1B2747;
  --border:#2A3A63;
  --muted:#AEB9D4;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.55;
  font-size:0.9rem;
  padding-bottom:64px;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent2)}
.container{width:100%;max-width:960px;margin:0 auto;padding:0 16px}
h1,h2,h3{line-height:1.25;letter-spacing:-0.01em}
h2{font-size:clamp(1.15rem,4.5vw,1.6rem);margin:0 0 12px;color:var(--text)}
h3{font-size:clamp(1rem,3.8vw,1.25rem);margin:20px 0 10px;color:var(--accent2)}
p{margin:0 0 14px;color:var(--text)}
strong{color:var(--accent);font-weight:700}

/* Header */
header{
  position:sticky;top:0;z-index:50;
  height:52px;
  display:flex;align-items:center;
  background:rgba(16,24,39,0.92);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  width:100%;max-width:960px;margin:0 auto;padding:0 14px;
  display:flex;align-items:center;justify-content:space-between;gap:8px;
}
.logo-link{display:flex;align-items:center;gap:8px;text-decoration:none;flex-shrink:0}
.logo-full{height:26px;display:none}
.logo-icon{height:32px;width:32px;display:block;border-radius:8px}
.logo-text{color:var(--text);font-weight:800;font-size:0.95rem;letter-spacing:-0.02em;white-space:nowrap}
.header-actions{display:flex;gap:6px;flex-shrink:0}
.header-actions{display:flex;gap:6px;flex-shrink:0}

/* Nav menu (hamburger on mobile, inline centered on desktop) */
.header-inner{position:relative;justify-content:space-between}
.nav-toggle-checkbox{position:absolute;opacity:0;pointer-events:none;width:0;height:0}
.hamburger-btn{
  display:flex;align-items:center;justify-content:center;
  width:34px;height:34px;flex-shrink:0;
  border:1.5px solid var(--border);border-radius:8px;
  cursor:pointer;background:transparent;
}
.hamburger-btn svg{stroke:var(--text)}
.site-nav{
  position:absolute;top:100%;left:0;right:0;
  background:var(--surface-2);border-bottom:1px solid var(--border);
  max-height:0;overflow:hidden;transition:max-height .25s ease;
  z-index:49;
}
.nav-toggle-checkbox:checked ~ .site-nav{max-height:260px}
.site-nav ul{list-style:none;margin:0;padding:6px 14px 12px;display:flex;flex-direction:column;gap:2px}
.site-nav a{
  display:block;padding:11px 6px;color:var(--text);text-decoration:none;
  font-weight:600;font-size:0.88rem;border-bottom:1px solid var(--border);
}
.site-nav li:last-child a{border-bottom:none}
.site-nav a:active,.site-nav a:hover{color:var(--accent)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  text-decoration:none;font-weight:700;border-radius:10px;
  cursor:pointer;border:none;white-space:nowrap;
  transition:transform .15s ease,filter .15s ease;
}
.btn:active{transform:scale(0.97)}
.btn-header-login{
  background:transparent;color:var(--text);
  border:1.5px solid var(--accent2);
  font-size:0.72rem;padding:8px 10px;
}
.btn-header-reg{
  background:var(--accent);color:#1a1300;
  font-size:0.72rem;padding:8px 12px;
}
.btn-primary{
  background:var(--accent);color:#1a1300;
  padding:13px 22px;font-size:0.95rem;border-radius:12px;
}
.btn-secondary{
  background:var(--primary);color:#fff;
  padding:13px 22px;font-size:0.95rem;border-radius:12px;
}
.btn-block{width:100%}
.btn-row{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 8px}

/* Hero banner */
.hero{
  width:100%;position:relative;
  background:linear-gradient(180deg,rgba(16,24,39,0.35),rgba(16,24,39,0.92)),
             url('image/banner.webp') center/cover no-repeat;
  min-height:220px;
  display:flex;align-items:flex-end;
}
.hero-inner{width:100%;max-width:960px;margin:0 auto;padding:24px 16px 20px}
.hero h1{
  font-size:clamp(1rem,5vw,1.4rem);
  margin:0 0 10px;
  color:var(--text);
  font-weight:800;
}
.hero-badges{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.badge{
  background:rgba(32,78,207,0.35);border:1px solid var(--accent2);
  color:var(--text);font-size:0.68rem;padding:4px 9px;border-radius:20px;
  font-weight:600;
}

/* Sections */
main{width:100%}
section{
  padding:14px 0 6px;
  border-bottom:1px solid var(--border);
}
section:last-of-type{border-bottom:none}
.section-inner{max-width:960px;margin:0 auto;padding:0 16px}
figure{margin:14px 0;border-radius:12px;overflow:hidden;background:var(--surface);border:1px solid var(--border)}
figure img{width:100%}
figcaption{padding:8px 12px;font-size:0.72rem;color:var(--muted)}

.quote{
  border-left:3px solid var(--accent);
  background:var(--surface);
  padding:12px 14px;margin:14px 0;border-radius:0 10px 10px 0;
  font-style:italic;color:var(--muted);font-size:0.87rem;
}

/* Lists */
ul.feature-list,ol.steps{margin:0 0 16px;padding-left:20px}
ul.feature-list li,ol.steps li{margin-bottom:8px;color:var(--text)}

/* Table */
.table-wrap{overflow-x:auto;margin:14px 0;border-radius:12px;border:1px solid var(--border)}
table{border-collapse:collapse;width:100%;min-width:480px;font-size:0.82rem}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--border)}
th{background:var(--surface-2);color:var(--accent);font-size:0.75rem;text-transform:uppercase;letter-spacing:.03em}
tr:last-child td{border-bottom:none}
tr:nth-child(odd) td{background:rgba(255,255,255,0.02)}

/* FAQ */
details{
  background:var(--surface);border:1px solid var(--border);border-radius:10px;
  margin-bottom:8px;padding:10px 14px;
}
summary{
  cursor:pointer;font-weight:700;color:var(--text);font-size:0.88rem;
  list-style:none;display:flex;justify-content:space-between;align-items:center;gap:8px;
}
summary::-webkit-details-marker{display:none}
summary::after{content:'+';color:var(--accent);font-size:1.2rem;flex-shrink:0}
details[open] summary::after{content:'–'}
details p{margin-top:8px;color:var(--muted);font-size:0.85rem}

/* Icon feature grid */
.icon-grid{display:grid;grid-template-columns:1fr;gap:10px;margin:14px 0}
.icon-card{
  background:var(--surface);border:1px solid var(--border);border-radius:12px;
  padding:12px;display:flex;gap:10px;align-items:flex-start;
}
.icon-card svg{flex-shrink:0;stroke:var(--accent2)}
.icon-card span{font-size:0.85rem;color:var(--text)}

/* CTA blocks */
.cta-block{
  background:var(--surface);border:1px solid var(--accent2);border-radius:14px;
  padding:16px;margin:16px 0;text-align:center;
}
.cta-block p{margin:0 0 10px;font-size:0.9rem;color:var(--text)}

/* Sticky mobile bottom bar */
.sticky-cta{
  position:fixed;bottom:0;left:0;right:0;z-index:60;
  background:var(--surface-2);border-top:1px solid var(--border);
  padding:8px 14px;display:flex;gap:8px;
}
.sticky-cta .btn{flex:1;padding:12px;font-size:0.88rem}

/* Desktop side widget */
.side-widget{display:none}

footer{padding:20px 16px 30px;text-align:center;color:var(--muted);font-size:0.75rem}

/* ≤380px extra narrow */
@media (max-width:380px){
  body{font-size:0.85rem}
  .header-inner{padding:0 10px}
  .btn-header-login,.btn-header-reg{font-size:0.66rem;padding:7px 8px}
  .logo-text{display:none}
  .hero-inner{padding:18px 12px 14px}
  .section-inner{padding:0 12px}
  h2{font-size:clamp(1.05rem,5vw,1.4rem)}
}

/* Tablet / desktop */
@media (min-width:601px){
  header{height:72px}
  .header-inner{padding:0 24px}
  .logo-full{display:block}
  .logo-icon{display:none}
  .btn-header-login,.btn-header-reg{font-size:0.85rem;padding:10px 18px}
  body{font-size:1rem;padding-bottom:0}
  .hero{min-height:340px}
  .hero-inner{padding:48px 24px 40px}
  section{padding:28px 0 10px}
  .section-inner{padding:0 24px}
  .icon-grid{grid-template-columns:repeat(2,1fr)}
  .sticky-cta{display:none}
  .hamburger-btn{display:none}
.site-nav{
  position:static;max-height:none;overflow:visible;background:transparent;border:none;
  order:2;flex:1;display:flex;justify-content:center;
}
.site-nav ul{flex-direction:row;padding:0;gap:22px}
.site-nav a{border-bottom:none;padding:0;font-size:0.9rem}
.logo-link{order:1}
.header-actions{order:3}
}

@media (min-width:1080px){
  .container,.section-inner,.header-inner,.hero-inner{max-width:1080px}
  main .layout{display:flex;gap:32px;max-width:1080px;margin:0 auto;padding:0 24px}
  main .layout .content{flex:1;min-width:0}
  .side-widget{
    display:block;width:260px;flex-shrink:0;
  }
  .side-widget-inner{
    position:sticky;top:96px;
    background:var(--surface);border:1px solid var(--accent2);border-radius:14px;
    padding:18px;
  }
  .side-widget-inner h4{margin:0 0 8px;color:var(--accent);font-size:1rem}
  .side-widget-inner p{font-size:0.82rem;color:var(--muted);margin-bottom:12px}
  .icon-grid{grid-template-columns:1fr}
  section .section-inner{max-width:100%;padding:0}
}