@media(max-width:980px){
  .links,.header-cta{display:none}
  .menu{display:flex;margin-left:auto}
  .nav{justify-content:space-between;min-height:78px}
  .mobile-nav{
    display:none;position:fixed;top:78px;left:14px;right:14px;z-index:29;
    background:rgba(255,255,255,.98);border:1px solid var(--line);
    border-radius:20px;box-shadow:0 18px 50px rgba(31,72,130,.16);overflow:hidden;
  }
  .mobile-nav.open{display:grid}
  .mobile-nav a{padding:16px 18px;border-bottom:1px solid var(--line);font-weight:800;color:#3e5372}
  .mobile-nav a:last-child{border-bottom:0}
  .hero-grid,.how,.faq{grid-template-columns:1fr}
  .hero-grid{gap:20px}
  .robot{min-height:285px}
  .robot img{width:320px}
  .plans,.benefits{grid-template-columns:repeat(2,1fr)}
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .trust article:nth-child(2){border-right:0}
  .section{padding:44px 0}
}
@media(max-width:640px){
  .shell{width:min(100% - 24px,100%)}
  .nav{min-height:72px}
  .mobile-nav{top:72px}
  .brand{min-width:0;gap:9px}
  .brand strong{font-size:21px}
  .brand small{font-size:11px;letter-spacing:.04em}
  .brandmark{width:40px;height:40px;border-radius:13px;font-size:18px}
  .hero{padding:20px 0 24px}
  .hero-grid{gap:10px}
  .robot{order:0;min-height:225px;margin-top:8px;margin-bottom:0}
  .robot:before{width:245px;height:245px}
  .robot:after{bottom:10px;width:145px;height:22px}
  .robot img{width:270px}
  .kicker{font-size:14px;line-height:1.35}
  h1{font-size:41px;line-height:.98;margin:12px 0 15px}
  .lead{font-size:17px;line-height:1.5}
  .actions{display:grid;grid-template-columns:1fr;margin-top:20px}
  .actions .cta{width:100%;min-height:54px}
  .plans,.benefits,.trust-grid{grid-template-columns:1fr}
  .trust{padding:14px 0}
  .trust article{border-right:0;border-bottom:1px solid var(--line);padding:18px 20px}
  .trust article:last-child{border-bottom:0}
  .center{margin-bottom:22px}
  .center h2,.how h2,.faq h2{font-size:32px}
  .center p,.how p,.faq p{font-size:17px}
  .section{padding:32px 0}
  .plan{padding:21px}
  .plan p{min-height:0}
  .price{font-size:40px}
  .step{grid-template-columns:50px 1fr;padding:18px}
  .num{width:50px;height:50px}
  .benefit{padding:20px}
  details{padding:18px}
  summary{font-size:18px}
  .final{padding:28px 0 42px}
  .finalbox{grid-template-columns:1fr;padding:24px;border-radius:22px}
  .finalbox h2{font-size:34px}
  .finalbox .cta{width:100%}
  .foot{flex-direction:column;align-items:flex-start}
}