:root{
  --ink:#0f172a; --ink-2:#334155; --ink-3:#64748b; --line:#e2e8f0; --line-2:#cbd5e1;
  --bg:#ffffff; --bg-2:#f8fafc; --bg-3:#f1f5f9;
  --accent:#b45309; --accent-2:#f59e0b; --accent-bg:#fffbeb;
  --radius:12px; --wrap:1140px;
  --shadow:0 1px 2px rgba(15,23,42,.06), 0 8px 24px -12px rgba(15,23,42,.14);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.25;margin:0 0 .5em;letter-spacing:-.015em}
h1{font-size:2.1rem;font-weight:700}
h2{font-size:1.5rem;font-weight:700;margin-top:0}
h3{font-size:1.06rem;font-weight:650}
p{margin:0 0 1em}
img{max-width:100%;height:auto}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:#fff;padding:8px 12px;border-radius:8px;z-index:99}

/* header */
.hdr{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.6) blur(8px);border-bottom:1px solid var(--line)}
.hdr-in{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:66px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo span{display:flex;flex-direction:column;line-height:1.15}
.logo b{font-size:.98rem;font-weight:700}
.logo i{font-style:normal;font-size:.72rem;color:var(--ink-3)}
.nav{display:flex;gap:0;flex-wrap:wrap}
.nav a{padding:7px 9px;border-radius:8px;font-size:.87rem;color:var(--ink-2);white-space:nowrap}
.nav a:hover{background:var(--bg-3);color:var(--ink)}

/* footer */
.ftr{margin-top:72px;background:var(--bg-2);border-top:1px solid var(--line);padding:40px 0 0}
.ftr-in{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.ftr b{display:block;margin-bottom:8px;font-size:.9rem}
.ftr p{margin:0;font-size:.88rem;color:var(--ink-3);line-height:1.7}
.ftr a{color:var(--ink-2)}
.ftr a:hover{color:var(--accent)}
.ftr-b{border-top:1px solid var(--line);margin-top:32px;padding:16px 22px;font-size:.78rem;color:var(--ink-3)}

/* layout */
main{padding-bottom:8px}
.sec{padding:44px 0}
.sec.tight{padding:26px 0}
.sec.alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.lead{font-size:1.06rem;color:var(--ink-2);max-width:74ch}

/* hero */
.hero{
  position:relative;padding:56px 0 40px;
  background:#fff url('/assets/hero-solar.jpg') center right / cover no-repeat;
  border-bottom:1px solid var(--line);
}
/* Светлая вуаль слева: текст ложится на почти белое, фото проявляется правее.
   Без неё тёмный h1 утонул бы в небе и панели. */
.hero::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(90deg,
    rgba(255,255,255,.97) 0%,
    rgba(255,255,255,.95) 30%,
    rgba(255,255,255,.78) 50%,
    rgba(255,255,255,.38) 72%,
    rgba(255,255,255,.12) 100%);
}
.hero>.wrap{position:relative;z-index:1}
.hero h1{font-size:2.5rem;max-width:20ch}
.hero .lead{font-size:1.14rem;max-width:58ch}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.btn{display:inline-block;padding:11px 20px;border-radius:9px;font-weight:600;font-size:.94rem;border:1px solid transparent}
.btn-p{background:var(--ink);color:#fff}
.btn-p:hover{background:#1e293b}
.btn-s{background:#fff;border-color:var(--line-2);color:var(--ink)}
.btn-s:hover{border-color:var(--ink-3)}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:34px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.stat b{display:block;font-size:1.5rem;letter-spacing:-.02em}
.stat span{font-size:.82rem;color:var(--ink-3);line-height:1.4;display:block;margin-top:2px}

/* cards grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(258px,100%),1fr));gap:16px}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(min(300px,100%),1fr))}
.card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px 14px;transition:border-color .15s,box-shadow .15s}
.card:hover{border-color:var(--line-2);box-shadow:var(--shadow)}
.card-h{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:10px}
.card-b{font-size:.76rem;font-weight:700;color:var(--ink-3);text-transform:uppercase;letter-spacing:.05em}
.card h3{margin:0 0 3px;font-size:1rem}
.card-m{margin:0 0 12px;font-size:.8rem;color:var(--ink-3);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.card-s{display:grid;grid-template-columns:1fr 1fr;gap:8px 12px;margin:0;padding-top:12px;border-top:1px solid var(--line)}
.card-s div{margin:0}
.card-s dt{font-size:.72rem;color:var(--ink-3);margin:0}
.card-s dd{margin:0;font-size:.9rem;font-weight:600}

/* карточка с фотографией */
.card.has-i{padding-top:0}
.card-i{aspect-ratio:4/3;margin:0 -18px 14px;background:var(--bg-2);border-bottom:1px solid var(--line);border-radius:calc(var(--radius) - 1px) calc(var(--radius) - 1px) 0 0;overflow:hidden;display:flex;align-items:center;justify-content:center}
.card-i img{width:100%;height:100%;object-fit:contain;padding:14px}
.card-i.flat{background:#fff}

/* фото на странице товара */
.p-img{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:22px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px}
.p-img img{max-height:340px;max-width:100%;width:auto;height:auto}
.p-img figcaption{font-size:.76rem;color:var(--ink-3);margin:0;text-align:center}

/* форма заявки */
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px}
.field{margin-bottom:16px}
.field label{display:block;font-size:.84rem;font-weight:600;margin-bottom:6px;color:var(--ink-2)}
.field .req{color:#b91c1c}
.field input,.field textarea{width:100%;padding:11px 13px;border:1px solid var(--line-2);border-radius:9px;font:inherit;font-size:.95rem;background:#fff;color:var(--ink)}
.field textarea{min-height:118px;resize:vertical}
.field input:focus,.field textarea:focus{outline:2px solid var(--accent-2);outline-offset:-1px;border-color:var(--accent-2)}
.trap{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:.85rem;color:var(--ink-2);margin:4px 0 18px;line-height:1.5}
.consent input{width:auto;margin:3px 0 0;flex:0 0 auto}
.consent a{color:var(--accent);text-decoration:underline}
.form-note{font-size:.8rem;color:var(--ink-3);margin:12px 0 0}
.form-ok{background:#ecfdf5;border:1px solid #a7f3d0;border-left-width:3px;border-radius:8px;padding:14px 16px;font-size:.9rem;color:#065f46}
.form-err{background:#fef2f2;border:1px solid #fecaca;border-left-width:3px;border-radius:8px;padding:14px 16px;font-size:.9rem;color:#7f1d1d;margin-bottom:14px}
.form-card button[type=submit]{width:100%;padding:13px 20px;border:0;border-radius:9px;background:var(--ink);color:#fff;font-weight:600;font-size:.96rem;cursor:pointer;font-family:inherit}
.form-card button[type=submit]:hover{background:#1e293b}
.form-card button[type=submit]:disabled{opacity:.6;cursor:default}

/* страница документации */
.ds-row{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px}
.ds-row:hover{border-color:var(--line-2);box-shadow:var(--shadow)}
.ds-row b{font-size:.95rem}
.ds-row span{display:block;font-size:.82rem;color:var(--ink-3)}
.ds-row .btn{flex:0 0 auto}

/* badges */
.badge{display:inline-block;padding:3px 8px;border-radius:99px;font-size:.7rem;font-weight:700;white-space:nowrap;border:1px solid}
.b-topcon{background:#eff6ff;color:#1d4ed8;border-color:#bfdbfe}
.b-hjt{background:#f5f3ff;color:#6d28d9;border-color:#ddd6fe}
.b-bc{background:#ecfdf5;color:#047857;border-color:#a7f3d0}
.b-perc{background:#f8fafc;color:#475569;border-color:#e2e8f0}
.b-warm{background:var(--accent-bg);color:var(--accent);border-color:#fde68a}
.b-hybrid{background:#f0fdfa;color:#0f766e;border-color:#99f6e4}
.b-grid{background:#eef2ff;color:#4338ca;border-color:#c7d2fe}
.b-bat{background:#fefce8;color:#a16207;border-color:#fde68a}
.b-cat{background:#0f172a;color:#fff;border-color:#0f172a}

/* tables */
.tw{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{border-collapse:collapse;width:100%;font-size:.9rem}
th{text-align:left;padding:11px 14px;background:var(--bg-2);border-bottom:1px solid var(--line);font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--ink-3);font-weight:700;white-space:nowrap}
td{padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
tr:last-child td{border-bottom:0}
td.k{font-weight:600}
tbody tr:hover{background:var(--bg-2)}

/* spec table */
.specs{display:grid;grid-template-columns:1fr 1fr;gap:0 28px}
.specs div{display:flex;justify-content:space-between;gap:14px;padding:9px 0;border-bottom:1px solid var(--line);font-size:.9rem}
.specs dt{color:var(--ink-3);margin:0}
.specs dd{margin:0;font-weight:600;text-align:right}

/* two column */
.cols{display:grid;grid-template-columns:1.55fr 1fr;gap:34px;align-items:start}
.cols.eq{grid-template-columns:1fr 1fr}
aside .box{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin-bottom:16px}
aside .box h3{margin-top:0;font-size:.95rem}
aside .box ul{margin:0;padding-left:18px;font-size:.88rem;color:var(--ink-2)}
aside .box li{margin-bottom:6px}
aside .box p:last-child{margin-bottom:0}

/* crumbs */
.crumbs{font-size:.82rem;color:var(--ink-3);padding:16px 0 0}
.crumbs a{color:var(--ink-3)}
.crumbs a:hover{color:var(--accent)}
.crumbs i{margin:0 7px;font-style:normal;opacity:.6}
.crumbs span{color:var(--ink-2)}

/* misc */
.note{background:var(--accent-bg);border:1px solid #fde68a;border-left-width:3px;border-radius:8px;padding:13px 16px;font-size:.88rem;color:#78350f}
.warn{background:#fef2f2;border:1px solid #fecaca;border-left-width:3px;border-radius:8px;padding:13px 16px;font-size:.88rem;color:#7f1d1d;margin-bottom:12px}
.pill{display:inline-block;padding:5px 11px;border-radius:99px;border:1px solid var(--line-2);font-size:.82rem;color:var(--ink-2);background:#fff}
.pill:hover{border-color:var(--ink-3);color:var(--ink)}
.pills{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.filters{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:20px;padding:14px 16px;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius)}
.filters fieldset{border:0;margin:0;padding:0}
.filters legend{font-size:.74rem;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-3);font-weight:700;padding:0 0 6px}
.filters .opts{display:flex;gap:6px;flex-wrap:wrap}
form.search{display:flex;gap:8px;max-width:520px;margin:0 0 18px}
form.search input{flex:1;padding:11px 14px;border:1px solid var(--line-2);border-radius:9px;font-size:.95rem;font-family:inherit}
form.search input:focus{outline:2px solid var(--accent-2);outline-offset:-1px;border-color:var(--accent-2)}
form.search button{padding:11px 20px;border:0;border-radius:9px;background:var(--ink);color:#fff;font-weight:600;font-size:.94rem;cursor:pointer}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.88rem}
.muted{color:var(--ink-3)}
.empty{background:var(--bg-2);border:1px dashed var(--line-2);border-radius:var(--radius);padding:28px;text-align:center;color:var(--ink-3)}
.dl{display:grid;grid-template-columns:1fr;gap:0;max-width:640px}
.dl div{display:flex;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px solid var(--line)}
.dl dt{margin:0;color:var(--ink-3);font-size:.9rem}
.dl dd{margin:0;font-weight:600;font-size:.9rem}
.hl{list-style:none;padding:0;margin:0}
.hl li{position:relative;padding-left:22px;margin-bottom:8px;font-size:.92rem;color:var(--ink-2)}
.hl li:before{content:"";position:absolute;left:2px;top:.55em;width:7px;height:7px;border-radius:2px;background:var(--accent-2)}
.bar{height:9px;border-radius:99px;background:var(--bg-3);overflow:hidden;margin-top:7px}
.bar i{display:block;height:100%;background:var(--accent-2);border-radius:99px}
.cta{background:var(--ink);color:#fff;border-radius:var(--radius);padding:32px 34px;display:flex;justify-content:space-between;align-items:center;gap:26px;flex-wrap:wrap}
.cta h2{color:#fff;margin-bottom:6px}
.cta p{color:#cbd5e1;margin:0;font-size:.94rem;max-width:56ch}
.cta .btn-p{background:#fff;color:var(--ink)}
.cta .btn-p:hover{background:var(--bg-3)}

@media(max-width:900px){
  .cols,.cols.eq{grid-template-columns:1fr;gap:26px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .ftr-in{grid-template-columns:1fr 1fr}
  .specs{grid-template-columns:1fr}
  .hero h1{font-size:1.9rem}
  /* На узком экране блок высокий, фото режется по краям — вуаль
     разворачиваем по вертикали, иначе текст уедет на светлое небо. */
  .hero{background-position:center 72%}
  .hero::before{
    background:linear-gradient(180deg,
      rgba(255,255,255,.96) 0%,
      rgba(255,255,255,.92) 48%,
      rgba(255,255,255,.86) 78%,
      rgba(255,255,255,.80) 100%);
  }
  .hero .lead{max-width:100%}
}
@media(max-width:640px){
  .nav{display:none}
  .ftr-in{grid-template-columns:1fr}
  h1{font-size:1.7rem}
  .cta{padding:24px}
}