:root{
    --bg:#F4F7FB;
    --surface:#ffffff;
    --ink:#0F172A;
    --ink-2:#475569;
    --line:#E2E8F0;
    --line-2:#EDF1F7;
    --cyan-1:#00C7FF;
    --cyan-2:#0EA5E9;
    --navy:#1E3A8A;
    --shadow-sm: 0 1px 2px rgba(15,23,42,.04), 0 2px 6px rgba(14,165,233,.05);
    --shadow-md: 0 4px 12px rgba(15,23,42,.05), 0 12px 28px rgba(14,165,233,.08);
    --shadow-lg: 0 10px 24px rgba(15,23,42,.06), 0 28px 60px rgba(14,165,233,.14);
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --pill: 999px;
    --t: cubic-bezier(.4,.14,.3,1);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color:var(--ink);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
    line-height:1.5;
  }
  a{color:inherit;text-decoration:none}
  button{font-family:inherit;cursor:pointer;border:none;background:none}
  .container{max-width:1200px;margin:0 auto;padding:0 24px}

  /* ---------- Header ---------- */
  .hdr{
    position:sticky;top:0;z-index:50;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background: rgba(244,247,251,.72);
    border-bottom:1px solid rgba(226,232,240,.6);
  }
  .hdr-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
  .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:-.01em}
  .brand-mark{
    width:36px;height:36px;border-radius:10px;
    display:inline-flex;align-items:center;justify-content:center;
    background:
      radial-gradient(120% 120% at 20% 10%, rgba(255,255,255,.9) 0%, transparent 50%),
      linear-gradient(135deg, #E0F4FB, #CFE8F5);
    box-shadow: 0 6px 14px rgba(14,165,233,.18), inset 0 0 0 1px rgba(14,165,233,.18);
    position:relative;overflow:hidden;
  }
  .brand-mark img{width:78%;height:78%;object-fit:contain}
  .nav{display:flex;align-items:center;gap:8px}
  .nav-link{
    padding:8px 14px;border-radius:var(--pill);
    color:var(--ink-2);font-weight:500;font-size:14.5px;
    transition:color .2s var(--t), background .2s var(--t);
  }
  .nav-link:hover{color:var(--ink);background:rgba(15,23,42,.04)}
  .btn{
    display:inline-flex;align-items:center;gap:8px;
    padding:11px 20px;border-radius:var(--pill);
    font-weight:600;font-size:14.5px;letter-spacing:-.005em;
    transition: transform .25s var(--t), box-shadow .25s var(--t), background .25s var(--t), color .25s var(--t);
    white-space:nowrap;
  }
  .btn-cyan{
    color:#fff;
    background: linear-gradient(135deg, var(--cyan-1), var(--cyan-2));
    box-shadow: 0 6px 16px rgba(14,165,233,.35), inset 0 1px 0 rgba(255,255,255,.3);
  }
  .btn-cyan:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(14,165,233,.45), inset 0 1px 0 rgba(255,255,255,.4)}
  .btn-ghost{
    color:var(--ink);background:#fff;
    box-shadow: inset 0 0 0 1px var(--line), 0 1px 2px rgba(15,23,42,.03);
  }
  .btn-ghost:hover{transform:translateY(-1px);box-shadow: inset 0 0 0 1px #cbd5e1, 0 6px 14px rgba(15,23,42,.06)}
  .btn-lg{padding:14px 24px;font-size:15.5px}

  .hide-sm{display:inline-flex}
  @media (max-width:640px){
    .hide-sm{display:none}
    .nav{gap:4px}
  }

  /* ---------- Hero ---------- */
  .hero{
    min-height: 90vh;
    display:flex;align-items:center;
    padding: 56px 0 72px;
    position:relative;
    overflow:hidden;
  }
  .hero-bg{
    position:absolute;inset:0;pointer-events:none;z-index:0;
    background:
      radial-gradient(60% 50% at 78% 35%, rgba(0,199,255,.18), transparent 60%),
      radial-gradient(40% 30% at 92% 80%, rgba(14,165,233,.12), transparent 70%);
  }
  .hero-grid{
    position:relative;z-index:1;
    display:grid;grid-template-columns: 1.2fr 1fr;gap:56px;align-items:center;
  }
  @media (max-width:1024px){.hero-grid{grid-template-columns:1fr;gap:40px}}

  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 12px 6px 8px;border-radius:var(--pill);
    background:#fff;box-shadow:inset 0 0 0 1px var(--line);
    font-size:13px;font-weight:500;color:var(--ink-2);
    margin-bottom:24px;
  }
  .eyebrow-dot{
    width:18px;height:18px;border-radius:6px;
    background: linear-gradient(135deg, var(--cyan-1), var(--cyan-2));
    box-shadow: 0 2px 6px rgba(14,165,233,.4);
    flex:0 0 auto;
  }
  h1{
    font-size: clamp(2.4rem, 4.8vw, 3.9rem);
    line-height:1.05;letter-spacing:-.025em;
    font-weight:800;margin:0 0 20px;
    text-wrap: balance;
  }
  h1 .accent{
    background: linear-gradient(135deg, var(--cyan-1), var(--cyan-2));
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .lede{
    font-size: clamp(1rem, 1.4vw, 1.18rem);
    color:var(--ink-2);max-width:560px;margin:0 0 32px;
    text-wrap:pretty;
  }
  .cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
  .trust{
    display:flex;flex-wrap:wrap;gap:18px 22px;
    color:var(--ink-2);font-size:13.5px;font-weight:500;
  }
  .trust-item{display:inline-flex;align-items:center;gap:7px}
  .check{
    width:16px;height:16px;border-radius:999px;
    background: linear-gradient(135deg, var(--cyan-1), var(--cyan-2));
    display:inline-flex;align-items:center;justify-content:center;
    color:#fff;font-size:10px;font-weight:800;flex:0 0 auto;
  }

  /* Mascot placeholder */
  .mascot-wrap{position:relative;display:flex;justify-content:center}
  .mascot-glow{
    position:absolute;inset:-40px;
    background: radial-gradient(50% 50% at 50% 50%, rgba(0,199,255,.45), transparent 65%);
    filter: blur(80px);z-index:0;
  }
  .mascot{
    position:relative;z-index:1;
    width:min(520px, 100%);aspect-ratio:1/1;
    display:flex;align-items:flex-end;justify-content:center;
    isolation:isolate;
  }
  .mascot img{
    width:100%;height:100%;object-fit:contain;
    filter: drop-shadow(0 30px 50px rgba(14,165,233,.35)) drop-shadow(0 10px 20px rgba(15,23,42,.15));
    position:relative;z-index:1;
  }
  /* Бегущий блик поверх картинки. */
  .mascot::after{
    content:"";
    position:absolute;inset:0;z-index:2;
    pointer-events:none;
    background:
      radial-gradient(40% 60% at 30% 30%, rgba(255,255,255,.55), transparent 70%),
      radial-gradient(30% 40% at 70% 70%, rgba(0,199,255,.35), transparent 70%);
    mix-blend-mode: screen;
    opacity:.7;
    animation: shimmer 8s ease-in-out infinite;
    filter: blur(4px);
  }
  /* Дополнительный «глянцевый» отблик — узкая полоса, идущая по диагонали. */
  .mascot::before{
    content:"";
    position:absolute;inset:0;z-index:3;
    pointer-events:none;
    background: linear-gradient(115deg,
      transparent 30%,
      rgba(255,255,255,.5) 45%,
      rgba(255,255,255,.7) 50%,
      rgba(255,255,255,.5) 55%,
      transparent 70%
    );
    mix-blend-mode: overlay;
    opacity:0;
    animation: glint 7s ease-in-out infinite;
    -webkit-mask-image: radial-gradient(closest-side, #000 70%, transparent 95%);
    mask-image: radial-gradient(closest-side, #000 70%, transparent 95%);
  }
  @keyframes shimmer{
    0%,100%{transform: translate(0,0) rotate(0deg);opacity:.55}
    50%{transform: translate(4%,-3%) rotate(2deg);opacity:.85}
  }
  @keyframes glint{
    0%,100%{opacity:0;transform: translateX(-30%) skewX(-8deg)}
    45%{opacity:.45;transform: translateX(0%) skewX(-8deg)}
    55%{opacity:.45;transform: translateX(0%) skewX(-8deg)}
    50%{opacity:.6}
  }
  @media (prefers-reduced-motion: reduce){
    .mascot::before, .mascot::after{animation: none}
  }
  .mascot-chip{
    position:absolute;z-index:2;
    background:#fff;
    border-radius:14px;
    padding:10px 14px 10px 12px;
    box-shadow: 0 12px 32px rgba(15,23,42,.12), inset 0 0 0 1px var(--line-2);
    display:flex;align-items:center;gap:10px;
    font-size:13px;
  }
  .mascot-chip .chip-icon{
    width:30px;height:30px;border-radius:9px;
    background: linear-gradient(135deg, var(--cyan-1), var(--cyan-2));
    color:#fff;display:inline-flex;align-items:center;justify-content:center;
    box-shadow: 0 4px 10px rgba(14,165,233,.35);
    flex:0 0 auto;
  }
  .mascot-chip strong{display:block;font-weight:600;color:var(--ink);font-size:13.5px;line-height:1.1}
  .mascot-chip span{color:var(--ink-2);font-size:12px;line-height:1.2}
  .chip-1{top:14%;left:-4%}
  .chip-2{bottom:18%;right:-6%}

  /* ---------- Section shared ---------- */
  section{padding: 88px 0}
  .sec-eyebrow{
    text-transform:uppercase;letter-spacing:.14em;font-weight:600;font-size:12px;
    color: var(--cyan-2);margin-bottom:14px;
  }
  h2{
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    line-height:1.1;letter-spacing:-.02em;font-weight:700;
    margin:0 0 14px;text-wrap:balance;
  }
  .sec-sub{color:var(--ink-2);font-size:1.05rem;max-width:620px;margin:0 0 48px}

  /* ---------- Stepper ---------- */
  .stepper{
    display:grid;grid-template-columns: 1fr 1.15fr;gap:48px;
    align-items:start;
  }
  .steps-col{position:relative}
  .steps-list{display:flex;flex-direction:column;gap:8px;position:sticky;top:96px}
  .step{
    width:100%;text-align:left;display:flex;gap:16px;
    padding:18px 18px 18px 22px;
    border-radius: var(--radius-md);
    background:#fff;
    box-shadow: inset 0 0 0 1px var(--line-2);
    transition: transform .25s var(--t), box-shadow .25s var(--t), background .25s var(--t);
    position:relative;
  }
  .step::before{
    content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;
    background:transparent;transition:background .25s var(--t);
  }
  .step:hover{transform:translateY(-2px);box-shadow: var(--shadow-sm), inset 0 0 0 1px var(--line)}
  .step.is-active{
    background:#fff;
    box-shadow: var(--shadow-md), inset 0 0 0 1px rgba(14,165,233,.25);
  }
  .step.is-active::before{
    background: linear-gradient(180deg, var(--cyan-1), var(--cyan-2));
  }
  .step-num{
    font-family:'JetBrains Mono', ui-monospace, monospace;
    font-weight:500;font-size:13px;color:var(--ink-2);
    padding-top:2px;flex:0 0 auto;letter-spacing:.02em;
    transition:color .2s var(--t);
  }
  .step.is-active .step-num{
    color: var(--cyan-2);font-weight:600;
  }
  .step-body h3{
    margin:0 0 4px;font-size:15.5px;font-weight:600;letter-spacing:-.01em;line-height:1.3;
  }
  .step-body p{
    margin:0;color:var(--ink-2);font-size:13.5px;line-height:1.5;
  }

  /* preview panel */
  .preview-col{position:sticky;top:96px}
  .preview{
    position:relative;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-lg);
    background:#fff;
    box-shadow: var(--shadow-lg), inset 0 0 0 1px var(--line-2);
    overflow:hidden;
  }
  .preview-bar{
    height:36px;
    background: linear-gradient(180deg,#F8FAFD,#EEF3F8);
    border-bottom:1px solid var(--line-2);
    display:flex;align-items:center;gap:6px;padding:0 14px;
    flex:0 0 auto;
  }
  .preview-bar i{width:10px;height:10px;border-radius:999px;background:#CBD5E1;display:inline-block}
  .preview-bar i:nth-child(1){background:#FCA5A5}
  .preview-bar i:nth-child(2){background:#FCD34D}
  .preview-bar i:nth-child(3){background:#86EFAC}
  .preview-bar .url{
    margin-left:14px;font-family:'JetBrains Mono',ui-monospace,monospace;
    font-size:11.5px;color:var(--ink-2);
    background:#fff;border-radius:6px;padding:4px 10px;
    box-shadow: inset 0 0 0 1px var(--line-2);
    max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  }
  .preview-stack{position:relative;height: calc(100% - 36px)}
  .frame{
    position:absolute;inset:0;
    display:flex;align-items:center;justify-content:center;
    padding:28px;
    opacity:0;transform: translateY(8px);
    transition: opacity .25s var(--t), transform .25s var(--t);
    pointer-events:none;
  }
  .frame.is-active{opacity:1;transform:none;pointer-events:auto}
  .placeholder{
    width:100%;height:100%;
    border-radius: var(--radius-md);
    background:
      repeating-linear-gradient(135deg, rgba(14,165,233,.05) 0 10px, transparent 10px 20px),
      linear-gradient(180deg,#fbfdff,#eef5fb);
    box-shadow: inset 0 0 0 1px rgba(14,165,233,.18);
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
    padding:24px;text-align:center;
  }
  .placeholder .ph-tag{
    font-family:'JetBrains Mono',ui-monospace,monospace;font-size:11px;color:var(--cyan-2);
    background:#fff;padding:4px 10px;border-radius:999px;
    box-shadow: inset 0 0 0 1px rgba(14,165,233,.25);
  }
  .placeholder .ph-text{
    font-size:14px;color:var(--ink);font-weight:500;max-width:360px;line-height:1.4;
  }
  .placeholder .ph-dim{
    font-family:'JetBrains Mono',ui-monospace,monospace;font-size:11px;color:var(--ink-2);
  }

  /* Реальный скрин шага. */
  .step-img{
    width:100%;height:100%;
    object-fit: contain;
    object-position: center;
    border-radius: var(--radius-md);
    background: linear-gradient(180deg,#fbfdff,#eef5fb);
    box-shadow: inset 0 0 0 1px rgba(14,165,233,.12);
    display:block;
  }

  /* mobile accordion */
  .step-mobile-panel{display:none}
  @media (max-width:1023px){
    .stepper{grid-template-columns:1fr;gap:0}
    .steps-list{position:static;gap:12px}
    .preview-col{display:none}
    .step{padding:18px 18px 18px 22px}
    .step{flex-direction:column;gap:0}
    .step-row{display:flex;gap:16px;align-items:flex-start}
    .step-mobile-panel{
      display:none;margin-top:0;
      max-height:0;overflow:hidden;
      transition: max-height .35s var(--t), margin-top .25s var(--t);
    }
    .step.is-active .step-mobile-panel{
      display:block;max-height:520px;margin-top:16px;
    }
    .step-mobile-panel .placeholder{aspect-ratio: 4/3;height:auto}
    .step-mobile-panel .step-img{aspect-ratio: 16/9;height:auto;width:100%}
  }

  /* ---------- FAQ ---------- */
  .faq{display:flex;flex-direction:column;gap:12px;max-width:880px}
  .qa{
    background:#fff;border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm), inset 0 0 0 1px var(--line-2);
    transition: box-shadow .25s var(--t), transform .25s var(--t);
    overflow:hidden;
  }
  .qa:hover{box-shadow: var(--shadow-md), inset 0 0 0 1px var(--line)}
  .qa-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:20px 22px;text-align:left;
    font-weight:600;font-size:16px;letter-spacing:-.01em;color:var(--ink);
  }
  .chev{
    width:28px;height:28px;border-radius:999px;
    background:#F4F7FB;display:inline-flex;align-items:center;justify-content:center;
    transition: transform .3s var(--t), background .25s var(--t), color .25s var(--t);
    color:var(--ink-2);flex:0 0 auto;
  }
  .qa[open] .chev{transform:rotate(180deg);background:linear-gradient(135deg,var(--cyan-1),var(--cyan-2));color:#fff}
  .qa-a-wrap{
    display:grid;grid-template-rows: 0fr;
    transition: grid-template-rows .3s var(--t);
  }
  .qa[open] .qa-a-wrap{grid-template-rows: 1fr}
  .qa-a{overflow:hidden}
  .qa-a-inner{padding:0 22px 22px;color:var(--ink-2);font-size:15px;line-height:1.55;max-width:680px}

  /* ---------- Footer ---------- */
  footer{
    background: var(--ink);
    color:#94A3B8;
    padding: 28px 0;
    position:relative;overflow:hidden;
  }
  footer::before{
    content:"";position:absolute;left:50%;top:-80px;width:600px;height:160px;
    transform:translateX(-50%);
    background: radial-gradient(50% 50% at 50% 50%, rgba(14,165,233,.25), transparent 70%);
    filter: blur(40px);pointer-events:none;
  }
  .ft-inner{
    position:relative;z-index:1;
    display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
    font-size:13.5px;
  }
  .ft-brand{display:flex;align-items:center;gap:10px;color:#E2E8F0;font-weight:600}
  .ft-links{display:flex;gap:18px}
  .ft-links a{color:#94A3B8;transition:color .2s var(--t)}
  .ft-links a:hover{color:#fff}
  .ft-meta{color:#64748B;font-size:12.5px}
  @media (max-width:640px){
    section{padding:64px 0}
    .hero{padding:32px 0 56px;min-height:auto}
    .ft-inner{flex-direction:column;align-items:flex-start;gap:14px}
  }

  /* ---------- Step images (одна или две картинки на шаг) ---------- */
  .step-imgs{
    flex:1;
    align-self: stretch;
    width:100%;height:100%;
    display:grid;
    grid-template-columns: 1fr;
    gap:8px;
    min-height:0;min-width:0;
  }
  .step-imgs.is-multi{grid-template-columns: 1fr 1fr}
  @media (max-width:1023px){
    /* В мобильном аккордеоне — всегда в столбик, чтобы было читаемо. */
    .step-imgs.is-multi{grid-template-columns: 1fr}
  }
  .step-img-btn{
    /* Сбрасываем стандартный «ребрист» button. */
    all: unset;
    box-sizing: border-box;
    display:block;
    width:100%;height:100%;
    position:relative;overflow:hidden;
    border-radius: var(--radius-md);
    /* Кастомный курсор-лупа (data-URI SVG, 32×32, ось в центре). */
    cursor: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='32' height='32' viewBox='0 0 32 32'><circle cx='14' cy='14' r='9' fill='rgba(14,165,233,0.15)' stroke='%230EA5E9' stroke-width='2.5'/><line x1='14' y1='10' x2='14' y2='18' stroke='%230EA5E9' stroke-width='2.5' stroke-linecap='round'/><line x1='10' y1='14' x2='18' y2='14' stroke='%230EA5E9' stroke-width='2.5' stroke-linecap='round'/><line x1='21' y1='21' x2='28' y2='28' stroke='%230EA5E9' stroke-width='3' stroke-linecap='round'/></svg>") 14 14, zoom-in;
    transition: transform .25s var(--t), box-shadow .25s var(--t);
    background:#fff;
  }
  .step-img-btn .step-img{
    transition: transform .35s var(--t), filter .25s var(--t);
  }
  .step-img-btn:hover{
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }
  .step-img-btn:hover .step-img{
    transform: scale(1.03);
    filter: brightness(1.02);
  }
  /* Полупрозрачное «свечение» при наведении — намёк, что элемент кликабельный. */
  .step-img-btn::after{
    content:"";
    position:absolute;inset:0;
    background: radial-gradient(60% 60% at 50% 50%, rgba(14,165,233,.10), transparent 70%);
    opacity:0;
    transition: opacity .3s var(--t);
    pointer-events:none;
  }
  .step-img-btn:hover::after{opacity:1}
  .step-img-btn:focus-visible{
    outline: 2px solid var(--cyan-2);
    outline-offset: 2px;
  }

  /* ---------- Lightbox ---------- */
  body.no-scroll{overflow:hidden}
  .lb{
    position:fixed;inset:0;z-index:1000;
    background: rgba(15,23,42,.92);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display:flex;align-items:center;justify-content:center;
    padding:32px;
    opacity:0;visibility:hidden;
    transition: opacity .25s var(--t), visibility .25s var(--t);
    cursor: zoom-out;
  }
  .lb.is-open{opacity:1;visibility:visible}
  .lb-img{
    max-width: 95vw;max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 30px 80px rgba(0,0,0,.5);
    cursor: default;
    transform: scale(.95);
    transition: transform .3s var(--t);
  }
  .lb.is-open .lb-img{transform: scale(1)}
  .lb-close{
    position:absolute;top:20px;right:20px;
    width:44px;height:44px;
    border-radius:999px;
    background: rgba(255,255,255,.12);
    color:#fff;
    display:inline-flex;align-items:center;justify-content:center;
    border:none;cursor:pointer;
    transition: background .2s var(--t), transform .2s var(--t);
    z-index:2;
  }
  .lb-close:hover{
    background: rgba(255,255,255,.22);
    transform: rotate(90deg);
  }
  .lb-close:focus-visible{
    outline: 2px solid #fff;
    outline-offset: 2px;
  }