/* ═══════════════════════════════════════════════════════
   PRODUCT / CATEGORY DETAIL PAGES — shared design system
   Used by: servo-voltage-stabilizer family, automatic
   stabilizer family, individual products (CVT, VAT,
   isolation transformer, online UPS, AC/mainline stabilizer)
   ═══════════════════════════════════════════════════════ */
.pd{--hair:#E6E7EA;--dim:#8A8E95}
.pd-in{max-width:1160px;margin:0 auto;padding:0 28px}
.pd-sec{padding:54px 0}
.pd-sec.soft{background:#FAFAFB;border-top:1px solid var(--hair);border-bottom:1px solid var(--hair)}
.pd-sec.dark{background:var(--grey-950,#1B1C1F)}

.pd-h{
  font-family:var(--font-display,'Poppins'),sans-serif;
  font-size:clamp(22px,2.8vw,29px);font-weight:700;letter-spacing:-.02em;
  line-height:1.24;color:var(--ink,#1B1C1F);margin:0;
  position:relative;padding-bottom:28px
}
.pd-h em{font-style:normal;color:var(--red,#FF2836)}
.pd-h::before{content:"";position:absolute;left:2px;bottom:6px;width:9px;height:9px;
  background:var(--red,#FF2836);transform:rotate(-45deg)}
.pd-h::after{content:"";position:absolute;left:14px;bottom:9.5px;width:78px;height:2px;
  background:var(--red,#FF2836)}
.pd-h.mid{display:inline-block}
.pd-h.mid::before{left:50%;transform:translateX(-44px) rotate(-45deg)}
.pd-h.mid::after{left:50%;transform:translateX(-33px)}
.pd-sec.dark .pd-h{color:#fff}
.pd-kicker{display:block;font-family:var(--font-mono,monospace);font-size:11px;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;color:var(--red,#FF2836);margin-bottom:11px}

/* ── Hero: image + intro ── */
.pd-hero{padding:52px 0 0}
.pd-hero-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:48px;align-items:center}
.pd-hero-grid.rev{grid-template-columns:1.05fr .95fr}
.pd-hero-grid.rev .fig{order:2}
.pd-hero img{width:100%;height:auto;border-radius:12px;display:block;
  box-shadow:0 16px 40px rgba(15,23,42,.14)}
.pd-hero .lead{font-size:16.5px;font-weight:600;color:var(--ink,#1B1C1F);line-height:1.5;margin:0 0 15px}
.pd-hero p{font-size:15px;line-height:1.8;color:#3E4248;margin:0 0 14px}
.pd-stamp{
  display:inline-flex;align-items:center;gap:9px;margin-top:6px;
  font-family:var(--font-mono,monospace);font-size:11.5px;font-weight:600;letter-spacing:.05em;
  color:var(--red,#FF2836);background:#FFF1F2;border:1px solid #FBD5D8;
  border-radius:999px;padding:7px 15px
}
.pd-stamp svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2.2;
  stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}

/* two product tiles (family hub pages) */
.pd-subtiles{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:6px}
.pd-subtile{
  border:1px solid var(--hair);border-radius:12px;background:#fff;overflow:hidden;text-decoration:none;
  display:block;transition:transform .2s cubic-bezier(.22,1,.36,1),box-shadow .2s,border-color .2s
}
.pd-subtile:hover{transform:translateY(-3px);border-color:transparent;box-shadow:0 12px 28px rgba(15,23,42,.12)}
.pd-subtile .shot{background:var(--soft,#F5F6F7);border-bottom:1px solid var(--hair);
  padding:4px;display:block;height:auto;aspect-ratio:1/1;overflow:hidden}
.pd-subtile .shot img{width:100%;height:100%;object-fit:contain}
.pd-subtile .cap{padding:12px 14px 14px;font-family:var(--font-display,'Poppins'),sans-serif;
  font-size:13.5px;font-weight:700;color:var(--ink,#1B1C1F);text-align:center}

/* ── Feature grid (numbered) ── */
/* The grid lines are drawn by each cell, not by the container background, so an
   odd number of features leaves a plain white gap instead of a grey block. */
.pd-feats{display:grid;grid-template-columns:1fr 1fr;gap:1px;
  background:transparent;border:0;margin-top:8px}
.pd-feat{background:#fff;padding:20px 22px;display:flex;gap:14px;align-items:flex-start;
  box-shadow:0 0 0 1px var(--hair)}
.pd-sec.dark .pd-feat{background:var(--grey-950,#1B1C1F);box-shadow:0 0 0 1px rgba(255,255,255,.13)}
.pd-feat .n{font-family:var(--font-mono,monospace);font-size:12px;font-weight:600;
  color:var(--red,#FF2836);flex-shrink:0;padding-top:2px}
.pd-feat b{display:block;font-family:var(--font-display,'Poppins'),sans-serif;font-size:14.5px;
  font-weight:700;color:var(--ink,#1B1C1F);margin-bottom:5px;line-height:1.35}
.pd-sec.dark .pd-feat b{color:#fff}
.pd-feat span{display:block;font-size:13.5px;line-height:1.65;color:var(--grey-600,#5B5F66)}
.pd-sec.dark .pd-feat span{color:rgba(255,255,255,.66)}

/* ── Applications tags ── */
.pd-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.pd-tag{
  display:flex;align-items:flex-start;gap:11px;
  background:#fff;border:1px solid var(--hair);border-radius:11px;
  padding:14px 18px;font-size:13.5px;line-height:1.55;color:var(--ink,#1B1C1F);
  flex:1 1 calc(33.333% - 10px);min-width:240px
}
.pd-tag svg{width:17px;height:17px;stroke:var(--red,#FF2836);fill:none;stroke-width:1.8;
  stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;margin-top:2px}
.pd-tag b{font-weight:700}

/* ── Spec table ── */
.pd-spec-wrap{border:1px solid var(--hair);border-radius:12px;overflow:hidden;background:#fff}
.pd-spec{width:100%;border-collapse:collapse;font-size:14px}
.pd-spec tr:nth-child(odd) td{background:#FAFBFC}
.pd-spec td{padding:12px 20px;border-bottom:1px solid #F1F2F4;color:#3E4248;line-height:1.55}
.pd-spec tr:last-child td{border-bottom:none}
.pd-spec td:first-child{
  font-family:var(--font-mono,monospace);font-size:11px;font-weight:600;letter-spacing:.07em;
  text-transform:uppercase;color:var(--dim);width:30%;white-space:nowrap
}
.pd-spec td:last-child{font-weight:600;color:var(--ink,#1B1C1F)}

/* On a phone the label column can't hold its own line beside a long value, so the
   two cells stack: label on top, value under it, each row the full width. */
@media(max-width:620px){
  .pd-spec,.pd-spec tbody,.pd-spec tr,.pd-spec td{display:block;width:auto}
  .pd-spec tr{padding:11px 15px;border-bottom:1px solid #F1F2F4}
  .pd-spec tr:last-child{border-bottom:none}
  .pd-spec tr:nth-child(odd){background:#FAFBFC}
  .pd-spec tr:nth-child(odd) td{background:transparent}
  .pd-spec td{padding:0;border-bottom:none;white-space:normal;word-break:break-word}
  .pd-spec td:first-child{width:auto;white-space:normal;margin-bottom:4px}
  .pd-spec td:last-child{font-size:13.5px;line-height:1.6}
}
/* tablets still fit two columns, just tighter */
@media(min-width:621px) and (max-width:768px){
  .pd-spec td{padding:10px 14px;font-size:13px}
}

/* ── Working mechanism diagram ──
   One image at every width: it fits the screen rather than being panned
   sideways, and tapping it opens the full-size sheet. The seven steps printed
   on the sheet are too small to read on a phone, so below 860px they are
   repeated underneath as real text. */
.pd-wm-frame{border:1px solid var(--hair,#E4E6EA);border-radius:12px;background:#fff;
  overflow:hidden;box-shadow:0 16px 40px rgba(15,23,42,.10)}
.pd-wm-frame a{display:block}
.pd-wm-frame img{display:block;width:100%;height:auto}
.pd-wm-label{font-family:var(--font-mono,monospace);font-size:11.5px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--ink,#1B1C1F);margin:34px 0 12px}
.pd-wm-label:first-of-type{margin-top:26px}
.pd-wm-mob{display:none}
.pd-wm-cap{display:none;font-family:var(--font-mono,monospace);font-size:11px;letter-spacing:.06em;
  text-transform:uppercase;color:#6B7280;margin:9px 0 20px;text-align:center}
.pd-wm-steps{list-style:none;counter-reset:wm;margin:0;padding:0}
.pd-wm-steps li{counter-increment:wm;position:relative;padding:0 0 14px 38px;
  font-size:14px;line-height:1.65;color:#3E4248}
.pd-wm-steps li::before{content:counter(wm);position:absolute;left:0;top:0;
  width:26px;height:26px;border-radius:50%;background:var(--ink,#1B1C1F);color:#fff;
  font-family:var(--font-mono,monospace);font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center}
.pd-wm-steps b{display:block;font-size:14.5px;color:var(--ink,#1B1C1F);margin-bottom:2px}
@media(max-width:860px){
  .pd-wm-mob{display:block}
  .pd-wm-cap{display:block}
  .pd-wm-label{margin:26px 0 12px}
}

/* ── Related products strip ── */
.pd-related{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.pd-rel-card{
  border:1px solid var(--hair);border-radius:12px;background:#fff;overflow:hidden;text-decoration:none;
  display:flex;flex-direction:column;
  transition:transform .22s cubic-bezier(.22,1,.36,1),box-shadow .22s,border-color .22s
}
.pd-rel-card:hover{transform:translateY(-4px);border-color:transparent;box-shadow:0 14px 32px rgba(15,23,42,.13)}
/* same frame as the shop grid's .pc-img: square, soft backdrop, image contained */
.pd-rel-card .shot{background:var(--soft,#F5F6F7);border-bottom:1px solid var(--hair);
  padding:4px;display:block;height:auto;aspect-ratio:1/1;overflow:hidden}
.pd-rel-card .shot img{width:100%;height:100%;max-height:none;object-fit:contain;
  transition:transform .3s cubic-bezier(.22,1,.36,1)}
.pd-rel-card:hover .shot img{transform:scale(1.06)}
.pd-rel-card .cap{padding:14px 16px 16px;display:flex;align-items:center;justify-content:space-between;gap:10px}
.pd-rel-card b{font-family:var(--font-display,'Poppins'),sans-serif;font-size:13.5px;font-weight:700;
  color:var(--ink,#1B1C1F);line-height:1.35}
.pd-rel-card svg{width:15px;height:15px;stroke:var(--red,#FF2836);fill:none;stroke-width:2.4;
  stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}

/* ── Why-us pillars ── */
.pd-pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.13)}
.pd-pillar{background:var(--grey-950,#1B1C1F);padding:24px 22px 26px}
.pd-pillar .n{display:block;font-family:var(--font-mono,monospace);font-size:11px;font-weight:600;
  letter-spacing:.14em;color:var(--red,#FF2836);margin-bottom:11px}
.pd-pillar h5{font-family:var(--font-display,'Poppins'),sans-serif;font-size:14.5px;font-weight:700;
  color:#fff;margin:0 0 6px;line-height:1.35}
.pd-pillar p{font-size:12.5px;line-height:1.6;color:rgba(255,255,255,.6);margin:0}

/* ── Certificates ── */
.pd-certs{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:820px;margin:0 auto}
.pd-certs img{width:100%;aspect-ratio:1;object-fit:contain;background:#fff;
  border:1px solid var(--hair);border-radius:10px;padding:14px}

/* ── Contact strip ── */
.pd-contact{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;
  background:var(--hair);border:1px solid var(--hair);border-radius:12px;overflow:hidden}
.pd-cinfo{background:#fff;padding:22px 24px}
.pd-cinfo .row{display:flex;align-items:flex-start;gap:12px;margin-bottom:14px}
.pd-cinfo .row:last-child{margin-bottom:0}
.pd-cinfo svg{width:17px;height:17px;stroke:var(--red,#FF2836);fill:none;stroke-width:1.8;
  stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;margin-top:2px}
.pd-cinfo b{display:block;font-size:13.5px;font-weight:600;color:var(--ink,#1B1C1F);line-height:1.5}
.pd-cinfo a{color:inherit;text-decoration:none}
.pd-cinfo a:hover{color:var(--red,#FF2836)}

/* ── Closing band ── */
.pd-cta{background:var(--grey-950,#1B1C1F);padding:50px 0 54px;position:relative;overflow:hidden;text-align:center}
.pd-cta::before{content:"";position:absolute;left:50%;top:-130px;width:520px;height:520px;
  transform:translateX(-50%);border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(255,40,54,.14),transparent 62%)}
.pd-cta .pd-in{position:relative;max-width:740px}
.pd-cta h3{font-family:var(--font-display,'Poppins'),sans-serif;
  font-size:clamp(21px,2.4vw,27px);font-weight:700;letter-spacing:-.02em;
  color:#fff;margin:0 0 14px;line-height:1.28}
.pd-cta p{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.68);margin:0 0 26px}
.pd-acts{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.pd-btn{display:inline-flex;align-items:center;gap:9px;padding:13px 26px;border-radius:2px;
  font-family:var(--font-display,'Poppins'),sans-serif;font-size:14px;font-weight:700;
  text-decoration:none;white-space:nowrap;transition:.18s}
.pd-btn svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2.2;
  stroke-linecap:round;stroke-linejoin:round}
.pd-btn-red{background:var(--red,#FF2836);color:#fff}
.pd-btn-red:hover{background:var(--red-deep,#D01E2A);color:#fff;transform:translateY(-2px)}
.pd-btn-line{border:1.5px solid rgba(255,255,255,.28);color:#fff}
.pd-btn-line:hover{background:#fff;color:var(--ink,#1B1C1F);border-color:#fff}

/* ── Responsive ── */
@media(max-width:1000px){
  .pd-hero-grid,.pd-hero-grid.rev{grid-template-columns:1fr;gap:26px}
  .pd-hero-grid .fig,.pd-hero-grid.rev .fig{order:-1}
  .pd-feats{grid-template-columns:1fr}
  .pd-related{grid-template-columns:1fr 1fr}
  .pd-pillars{grid-template-columns:1fr}
  .pd-contact{grid-template-columns:1fr}
}
@media(max-width:768px){
  .pd-in{padding:0 18px}
  .pd-hero{padding:34px 0 0}
  .pd-sec{padding:36px 0}
  .pd-hero .lead{font-size:15px}
  .pd-hero p{font-size:14px}
  .pd-subtiles{grid-template-columns:1fr}
  .pd-tag{flex:1 1 100%}
  .pd-related{grid-template-columns:1fr}
  .pd-certs{grid-template-columns:1fr 1fr;gap:12px}
  .pd-cta{padding:34px 0 38px}
  .pd-btn{flex:1;justify-content:center}
}