.radon-landing{
  /* Tassenbacher-Look: hell, klar, Orange als Akzent */
  --bg: #ffffff;
  --bg-alt: #f6f6f6;
  --panel: #ffffff;

  --text: #111111;
  --muted: #5f5f5f;

  /* Orange Akzent (Logo-Anmutung) */
  --brand: #f05a28;
  --brand-2: #ff7a45;

  --border: rgba(0,0,0,.10);
  --shadow: 0 14px 40px rgba(0,0,0,.10);
  --radius: 18px;
  --max: 1120px;
}

*{box-sizing:border-box}
.radon-landing{margin:0;padding:0}
.radon-landing{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

.radon-landing a{color:inherit}
.radon-landing .container{max-width:var(--max);margin:0 auto;padding:0 22px}

/* Header */
.radon-landing .header{
  position: sticky; top:0; z-index:20;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.radon-landing .header__inner{
  display:flex; align-items:center; justify-content:space-between;
  height: 70px;
}
.radon-landing .logo{
  font-weight: 850;
  letter-spacing: .2px;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #fff;
}
.radon-landing .nav{display:flex; gap:18px; align-items:center}
.radon-landing .nav a{
  text-decoration:none;
  color: var(--text);
  opacity: .9;
  font-weight: 650;
}
.radon-landing .nav a:hover{opacity:1}

.radon-landing .nav__toggle{
  display:none;
  border:1px solid var(--border);
  background:#fff;
  border-radius:14px;
  padding:10px;
}
.radon-landing .nav__toggle span{
  display:block; width:20px; height:2px;
  background: var(--text);
  margin:4px 0; opacity:.9;
}

/* Buttons */
.radon-landing .btn{
  display:inline-flex; align-items:center; justify-content:center;
  gap:10px;
  padding: 12px 16px;
  border-radius: 14px;
  background: var(--brand);
  color: #ffffff;
  font-weight: 800;
  border: 1px solid rgba(0,0,0,.08);
  box-shadow: 0 10px 24px rgba(240,90,40,.22);
  text-decoration:none;
}
.radon-landing .btn:hover{transform: translateY(-1px)}
.radon-landing .btn--small{padding:10px 12px;border-radius:12px}
.radon-landing .btn--ghost{
  background: #fff;
  color: var(--text);
  box-shadow: none;
  border: 1px solid var(--border);
}
.radon-landing .btn--ghost:hover{border-color: rgba(0,0,0,.18)}

/* Hero */
.radon-landing .hero{
  padding: 70px 0 34px;
  background:
    radial-gradient(900px 360px at 12% 10%, rgba(240,90,40,.09), transparent 60%),
    radial-gradient(700px 320px at 88% 8%, rgba(0,0,0,.06), transparent 60%),
    var(--bg);
}
.radon-landing .hero__grid{
  display:grid;
  grid-template-columns: 1.25fr .95fr;
  gap: 22px;
  align-items:start;
}
.radon-landing .badge{
  display:inline-block;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--muted);
  margin:0 0 12px;
  font-weight: 650;
}
.radon-landing h1{
  font-size: 44px;
  line-height: 1.06;
  margin: 0 0 14px;
  letter-spacing: -.4px;
}
.radon-landing .lead{
  font-size: 18px;
  color: var(--muted);
  margin: 0 0 18px;
}
.radon-landing .hero__cta{display:flex; gap:12px; flex-wrap:wrap; margin: 10px 0 16px}

.radon-landing .note{
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
}
.radon-landing .note a{
  color: var(--brand);
  font-weight: 750;
  text-decoration: none;
}
.radon-landing .note a:hover{text-decoration: underline}

/* Hero Card */
.radon-landing .hero__card{
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.radon-landing .hero__card h2{margin:0 0 10px; font-size: 18px}
.radon-landing .muted{color: var(--muted)}
.radon-landing .small{font-size: 13px}

.radon-landing .trust{
  display:flex; gap:14px; flex-wrap:wrap;
  margin-top: 10px;
}
.radon-landing .trust__item{
  min-width: 190px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 16px;
  padding: 10px 12px;
}
.radon-landing .trust__item strong{display:block; font-size: 16px}
.radon-landing .trust__item span{color: var(--muted); font-size: 13px}

/* Sections */
.radon-landing .section{padding: 56px 0}
.radon-landing .section--alt{
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.radon-landing .section__head{margin-bottom: 18px}
.radon-landing .section__head h2{
  margin: 0 0 6px;
  font-size: 30px;
  letter-spacing: -.2px;
}

/* Cards / Panels */
.radon-landing .cards{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.radon-landing .card{
  border: 1px solid var(--border);
  background: #fff;
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 8px 22px rgba(0,0,0,.06);
}
.radon-landing .card h3{margin:0 0 8px}
.radon-landing .mini{margin:10px 0 0; padding-left: 18px; color: var(--muted)}
.radon-landing .mini li{margin:4px 0}

.radon-landing .split{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.radon-landing .panel{
  border: 1px solid var(--border);
  background: #fff;
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 8px 22px rgba(0,0,0,.06);
}
.radon-landing .callout{
  margin-top: 14px;
  border: 1px solid rgba(240,90,40,.25);
  background: rgba(240,90,40,.06);
  border-radius: var(--radius);
  padding: 14px 16px;
  display:flex;
  gap: 10px;
  flex-wrap:wrap;
}
.radon-landing .callout strong{color: var(--brand)}

/* FAQ */
.radon-landing .faq details{
  border: 1px solid var(--border);
  background: #fff;
  border-radius: var(--radius);
  padding: 12px 14px;
  margin: 10px 0;
  box-shadow: 0 8px 22px rgba(0,0,0,.06);
}
.radon-landing .faq summary{
  cursor:pointer;
  font-weight: 800;
}
.radon-landing .faq p{color: var(--muted); margin: 10px 0 0}

/* Contact */
.radon-landing .contact{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items:start;
}
.radon-landing .contact__meta{
  display:flex; gap: 14px; flex-wrap:wrap; margin-top: 14px;
}
.radon-landing .contact__meta > div{
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 16px;
  padding: 12px 14px;
  min-width: 230px;
  box-shadow: 0 8px 22px rgba(0,0,0,.06);
}

/* Form */
.radon-landing .form{
  border: 1px solid var(--border);
  background: #fff;
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}
.radon-landing label{display:block; font-weight: 750; font-size: 14px; margin: 10px 0}
.radon-landing input, .radon-landing textarea{
  width: 100%;
  margin-top: 6px;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid rgba(0,0,0,.14);
  background: #fff;
  color: var(--text);
  outline: none;
}
.radon-landing input:focus, .radon-landing textarea:focus{
  border-color: rgba(240,90,40,.55);
  box-shadow: 0 0 0 4px rgba(240,90,40,.14);
}

/* Lists */
.radon-landing .checklist{margin: 10px 0 0; padding-left: 18px}
.radon-landing .checklist li{margin: 6px 0}

/* Footer */
.radon-landing .footer{
  padding: 26px 0;
  border-top: 1px solid var(--border);
  background: #fff;
}
.radon-landing .footer__inner{
  display:flex;
  justify-content:space-between;
  gap: 12px;
  flex-wrap:wrap;
  color: var(--muted);
}
.radon-landing .footer a{
  color: var(--brand);
  text-decoration:none;
  font-weight: 750;
}
.radon-landing .footer a:hover{text-decoration: underline}

/* Responsive */
@media (max-width: 980px){
  .radon-landing .cards{grid-template-columns: repeat(2, 1fr)}
  .radon-landing .hero__grid{grid-template-columns: 1fr}
  .radon-landing .split{grid-template-columns: 1fr}
}
@media (max-width: 640px){
  .radon-landing h1{font-size: 34px}
  .radon-landing .contact{grid-template-columns: 1fr}

  .radon-landing .nav{
    position: fixed;
    inset: 70px 12px auto 12px;
    display:none;
    flex-direction:column;
    gap: 12px;
    padding: 14px;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.96);
    box-shadow: var(--shadow);
  }
  .radon-landing .nav.open{display:flex}
  .radon-landing .nav__toggle{display:block}
}