/* =========================================================
   SUNTECH ROBOTICS — product detail pages
   Loads AFTER style.css (reuses :root tokens)
   ========================================================= */

.back-link { font-family: var(--en); font-size: 13px; color: var(--mist); display: inline-flex; align-items: center; gap: 8px; transition: color 0.25s; }
.back-link:hover { color: var(--gold-bright); }
.back-link .ar { transition: transform 0.3s var(--ease); }
.back-link:hover .ar { transform: translateX(-4px); }

/* ---- Detail hero ---- */
.dhero {
  position: relative; overflow: hidden; padding-top: 120px;
  background:
    radial-gradient(110% 80% at 85% 0%, rgba(22,36,74,0.7), transparent 55%),
    radial-gradient(70% 60% at 0% 100%, rgba(198,164,97,0.06), transparent 60%),
    var(--navy-900);
}
.dhero-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--line-soft) 1px, transparent 1px), linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(70% 80% at 70% 30%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(70% 80% at 70% 30%, #000 20%, transparent 75%);
  opacity: 0.45;
}
.dhero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 0.9fr; gap: 40px; align-items: center; padding-bottom: clamp(40px, 6vw, 80px); }
.dhero .cat { font-family: var(--en); font-size: 12px; letter-spacing: 0.26em; color: var(--gold); text-transform: uppercase; }
.dhero h1 { font-size: clamp(34px, 5.4vw, 62px); font-weight: 700; letter-spacing: -0.04em; line-height: 1.08; margin-top: 16px; }
.dhero .model { font-family: var(--en); font-size: 15px; letter-spacing: 0.12em; color: var(--ink); margin-top: 12px; }
.dhero .model b { color: var(--gold-bright); }
.dhero .tagline { color: var(--mist); font-size: clamp(15px, 1.5vw, 18px); margin-top: 20px; max-width: 46ch; }
.dhero .chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.dhero .chips span { border: 1px solid var(--line); border-radius: 999px; padding: 7px 14px; font-size: 13px; color: var(--mist); }
.dhero .chips span b { color: var(--gold-bright); font-family: var(--en); }
.dhero-actions { margin-top: 32px; display: flex; gap: 12px; flex-wrap: wrap; }
.dhero-visual { position: relative; display: flex; justify-content: center; align-items: center; }
.dhero-visual img { width: min(80%, 380px); filter: drop-shadow(0 36px 56px rgba(0,0,0,0.6)); animation: floatD 6s ease-in-out infinite; }
@keyframes floatD { 0%,100% { transform: translateY(0);} 50% { transform: translateY(-14px);} }
.dhero-visual .glow { position: absolute; bottom: 6%; left: 50%; transform: translateX(-50%); width: 65%; height: 36px; border-radius: 50%; background: radial-gradient(ellipse, rgba(198,164,97,0.32), transparent 70%); filter: blur(8px); }

/* ---- Spec strip ---- */
.spec-strip { border-block: 1px solid var(--line-soft); background: var(--navy-850); }
.spec-strip-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.spec-strip .cell { padding: clamp(28px,4vw,44px) 22px; text-align: center; position: relative; }
.spec-strip .cell + .cell::before { content: ""; position: absolute; left: 0; top: 26%; height: 48%; width: 1px; background: var(--line-soft); }
.spec-strip .v { font-family: var(--en); font-size: clamp(26px,3.4vw,38px); font-weight: 700; color: var(--gold-bright); line-height: 1; letter-spacing: -0.02em; }
.spec-strip .v small { font-size: 0.5em; font-weight: 500; color: var(--gold); margin-left: 3px; }
.spec-strip .k { color: var(--mist); font-size: 13px; margin-top: 10px; }

/* ---- Feature blocks ---- */
.feat-head { text-align: center; max-width: 60ch; margin-inline: auto; }
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: clamp(40px,5vw,60px); }
.feat {
  border: 1px solid var(--line-soft); border-radius: var(--r); padding: 32px; background: var(--navy-800);
  transition: border-color 0.3s, transform 0.3s var(--ease);
}
.feat:hover { border-color: var(--line); transform: translateY(-4px); }
.feat .ico { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; background: rgba(198,164,97,0.1); border: 1px solid var(--line); margin-bottom: 18px; }
.feat .ico svg { width: 24px; height: 24px; stroke: var(--gold-bright); fill: none; stroke-width: 1.6; }
.feat h3 { font-size: 18px; font-weight: 600; }
.feat p { color: var(--mist); font-size: 14.5px; margin-top: 10px; }

/* ---- Video block ---- */
.video-block { border-radius: 20px; overflow: hidden; border: 1px solid var(--line-soft); margin-top: clamp(40px,5vw,60px); position: relative; background: #000; }
.video-block video { width: 100%; display: block; }

/* ---- Gallery ---- */
.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: clamp(40px,5vw,60px); }
.gallery figure { border-radius: var(--r); overflow: hidden; border: 1px solid var(--line-soft); position: relative; aspect-ratio: 16/10; }
.gallery img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease); }
.gallery figure:hover img { transform: scale(1.05); }
.gallery figcaption { position: absolute; left: 16px; bottom: 14px; font-size: 13px; color: #fff; background: rgba(7,13,28,0.6); border: 1px solid var(--line-soft); padding: 5px 12px; border-radius: 999px; backdrop-filter: blur(4px); }

/* ---- Lineup (cleaning sub-models) ---- */
.lineup { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: clamp(36px,5vw,56px); }
.lineup .item { border: 1px solid var(--line-soft); border-radius: var(--r); background: radial-gradient(120% 100% at 100% 0%, rgba(22,36,74,0.45), var(--navy-800)); padding: 28px; text-align: center; transition: border-color 0.3s, transform 0.3s var(--ease); }
.lineup .item:hover { border-color: var(--line); transform: translateY(-4px); }
.lineup .item img { height: 150px; width: auto; margin: 0 auto 18px; object-fit: contain; }
.lineup .item .code { font-family: var(--en); color: var(--gold-bright); font-weight: 600; letter-spacing: 0.06em; }
.lineup .item h4 { font-size: 16px; margin-top: 6px; }
.lineup .item p { color: var(--mist); font-size: 13.5px; margin-top: 8px; }

/* ---- Full spec table ---- */
.spec-table { border: 1px solid var(--line-soft); border-radius: var(--r); overflow: hidden; margin-top: clamp(36px,5vw,56px); }
.spec-table .row { display: grid; grid-template-columns: 0.4fr 0.6fr; border-top: 1px solid var(--line-soft); }
.spec-table .row:first-child { border-top: none; }
.spec-table .row .key { padding: 18px 24px; background: var(--navy-850); color: var(--mist); font-size: 14px; }
.spec-table .row .val { padding: 18px 24px; background: var(--navy-800); font-size: 14.5px; white-space: pre-line; }

/* ---- Related products ---- */
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: clamp(36px,5vw,52px); }
.related-card { border: 1px solid var(--line-soft); border-radius: var(--r); padding: 26px; background: var(--navy-800); transition: border-color 0.3s, transform 0.3s var(--ease); display: flex; flex-direction: column; gap: 6px; }
.related-card:hover { border-color: var(--line); transform: translateY(-4px); }
.related-card .rc-cat { font-family: var(--en); font-size: 11px; letter-spacing: 0.16em; color: var(--gold); text-transform: uppercase; }
.related-card h4 { font-size: 19px; font-weight: 600; }
.related-card .rc-model { font-family: var(--en); font-size: 13px; color: var(--mist-dim); }
.related-card .rc-go { margin-top: 10px; font-size: 13px; color: var(--gold-bright); }

/* ---- CTA band ---- */
.cta-band { background: radial-gradient(120% 140% at 50% 0%, rgba(198,164,97,0.1), var(--navy-850)); border-block: 1px solid var(--line-soft); text-align: center; }
.cta-band h2 { font-size: clamp(26px,3.6vw,42px); font-weight: 700; letter-spacing: -0.03em; }
.cta-band p { color: var(--mist); margin-top: 14px; }
.cta-band .btns { margin-top: 30px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

@media (max-width: 980px) {
  .dhero-inner { grid-template-columns: 1fr; }
  .dhero-visual { order: -1; max-width: 320px; }
  .feat-grid, .lineup, .related-grid { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .spec-strip-grid { grid-template-columns: 1fr 1fr; }
  .spec-strip .cell:nth-child(3)::before, .spec-strip .cell:nth-child(1)::before { display: none; }
  .spec-strip .cell:nth-child(3), .spec-strip .cell:nth-child(4) { border-top: 1px solid var(--line-soft); }
  .spec-table .row { grid-template-columns: 1fr; }
  .spec-table .row .key { border-bottom: 1px solid var(--line-soft); }
}