/* ============================================================
   XTRAFLY — design system
   Dark technical theme. Grotesque uppercase headlines, mono
   kickers, hairline borders, sharp corners.
   ============================================================ */

:root {
  --bg: #000;
  --bg-alt: #070708;
  --panel: #0c0c0e;
  --panel-2: #101013;
  --line: rgba(255, 255, 255, 0.14);
  --line-soft: rgba(255, 255, 255, 0.07);
  --text: #fff;
  --text-2: rgba(255, 255, 255, 0.8);
  --text-3: rgba(255, 255, 255, 0.62);
  --accent: #7fd4c1;
  --accent-dim: rgba(127, 212, 193, 0.15);
  --sans: "Helvetica Neue", Helvetica, Arial, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --nav-h: 68px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.mono { font-family: var(--mono); }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: #fff; color: #000; padding: 8px 16px;
}
.skip:focus { left: 0; }

.container { width: min(1240px, 92vw); margin: 0 auto; }

.muted { color: var(--text-2); }

/* ---------- type ---------- */

h1, h2, h3 { text-transform: uppercase; letter-spacing: 0.01em; }

h1 {
  font-size: clamp(2.1rem, 5.2vw, 4.2rem);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -0.005em;
  max-width: 18ch;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 600;
  line-height: 1.15;
}

h3 { font-size: 1.02rem; font-weight: 600; letter-spacing: 0.02em; }

.kicker {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 18px;
}
.kicker::before {
  content: "// ";
  color: var(--accent);
}

.lede { font-size: 1.25rem; color: var(--text); margin-bottom: 1.2em; }

p { color: var(--text-2); }

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 15px 30px;
  border-radius: 2px;
  border: 1px solid transparent;
  transition: all 0.18s ease;
  cursor: pointer;
  white-space: nowrap;
}

.btn-solid { background: #fff; color: #000; }
.btn-solid:hover { background: var(--accent); color: #000; }

.btn-ghost { border-color: rgba(255, 255, 255, 0.35); color: #fff; }
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, 0.06); }

/* ---------- nav ---------- */

.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--nav-h);
  transition: background 0.25s ease, border-color 0.25s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line-soft);
}

.nav-inner {
  width: min(1400px, 96vw); margin: 0 auto;
  height: 100%;
  display: flex; align-items: center; gap: 32px;
}

.brand-logo {
  height: 26px; width: auto;
  filter: invert(1);           /* logo file is black-on-transparent */
  opacity: 0.95;
}

.nav-links {
  display: flex; gap: 0; margin-left: auto;
  font-family: var(--mono); font-size: 0.74rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  flex-wrap: nowrap;
}
.nav-links a {
  padding: 10px 9px; color: var(--text-2);
  transition: color 0.15s ease;
  white-space: nowrap;
}
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: #fff; }
.nav-links a.active::after {
  content: ""; display: block; height: 1px; background: var(--accent); margin-top: 6px;
}
.nav-store {
  color: var(--accent) !important;
  border: 1px solid rgba(127, 212, 193, 0.55);
  border-radius: 2px;
  padding: 8px 13px !important;
  margin-left: 6px;
  background: rgba(127, 212, 193, 0.08);
  font-weight: 500;
  transition: background 0.15s ease, color 0.15s ease;
}
.nav-store:hover {
  background: var(--accent);
  color: #001510 !important;
}

.nav-cta { padding: 9px 14px; font-size: 0.64rem; letter-spacing: 0.1em; }

.nav-burger {
  display: none; background: none; border: 0; cursor: pointer;
  width: 40px; height: 40px; position: relative;
}
.nav-burger span {
  display: block; width: 22px; height: 1.5px; background: #fff;
  position: absolute; left: 9px; transition: transform 0.2s ease, top 0.2s ease;
}
.nav-burger span:nth-child(1) { top: 16px; }
.nav-burger span:nth-child(2) { top: 23px; }
.nav-open .nav-burger span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav-open .nav-burger span:nth-child(2) { top: 20px; transform: rotate(-45deg); }

.nav-drawer {
  display: none;
  position: fixed; inset: var(--nav-h) 0 auto 0; z-index: 99;
  background: rgba(0, 0, 0, 0.97);
  border-bottom: 1px solid var(--line-soft);
  padding: 12px 6vw 32px;
}
.nav-drawer nav {
  display: flex; flex-direction: column;
  font-family: var(--mono); font-size: 0.95rem;
  letter-spacing: 0.12em; text-transform: uppercase;
}
.nav-drawer a { padding: 15px 0; border-bottom: 1px solid var(--line-soft); color: var(--text-2); }
.nav-drawer a.active, .nav-drawer a:hover { color: #fff; }
.nav-drawer .drawer-cta { color: var(--accent); }
.nav-open .nav-drawer { display: block; }

/* ---------- hero ---------- */

.hero {
  position: relative;
  min-height: 92vh;
  display: flex; align-items: center;
  padding: calc(var(--nav-h) + 6vh) 0 8vh;
  overflow: hidden;
}
.hero-bg, .hero-bg img { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-bg img { object-fit: cover; opacity: 0.68; }
.hero-shade {
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0.25) 40%, rgba(0,0,0,0.92) 100%),
    radial-gradient(70% 60% at 20% 40%, rgba(0,0,0,0.05), rgba(0,0,0,0.62));
}
.hero-grid {
  position: absolute; inset: 0; opacity: 0.5;
  background-image:
    linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, transparent, #000 30%, #000 70%, transparent);
}
.hero-inner { position: relative; z-index: 2; }
.hero-sub {
  font-size: 1.1rem; max-width: 58ch; margin: 22px 0 34px; color: rgba(255,255,255,0.88);
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-meta {
  display: flex; gap: 34px; flex-wrap: wrap;
  margin-top: 58px;
  font-size: 0.68rem; letter-spacing: 0.18em; color: var(--text-3);
}
.hero-meta span { border-left: 1px solid var(--line); padding-left: 14px; }
.hero-meta span:first-child { border-left: 0; padding-left: 0; }

/* ---------- page hero (inner pages) ---------- */

.page-hero {
  padding: calc(var(--nav-h) + 72px) 0 56px;
  border-bottom: 1px solid var(--line-soft);
  background:
    linear-gradient(180deg, var(--bg-alt), transparent),
    var(--bg);
}
.page-hero p { max-width: 62ch; margin-top: 18px; font-size: 1.05rem; }
.page-hero a { color: var(--accent); }

/* ---------- sections ---------- */

.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }

.section-head { margin-bottom: 48px; max-width: 720px; }
.section-lead { margin-top: 14px; }

.section-more { margin-top: 44px; }

/* ---------- grids & cards ---------- */

.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cats { grid-template-columns: repeat(2, 1fr); gap: 24px; }

.card {
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  padding: 26px;
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}
.card:hover { border-color: var(--line); background: var(--panel-2); transform: translateY(-2px); }

.cap-card .num { color: var(--accent); font-size: 0.78rem; letter-spacing: 0.14em; }
.cap-card h3 { margin: 14px 0 10px; }
.cap-card p { font-size: 0.9rem; }

.step-card .num { color: var(--accent); font-size: 0.78rem; letter-spacing: 0.14em; }
.step-card h3 { margin: 14px 0 10px; font-size: 0.95rem; }
.step-card p { font-size: 0.88rem; }

/* ---------- product cards ---------- */

.product-card { padding: 0; display: flex; flex-direction: column; }
.product-img {
  background: radial-gradient(80% 80% at 50% 40%, #1d1d22 0%, #131316 70%, #101013 100%);
  border-bottom: 1px solid var(--line-soft);
  aspect-ratio: 4 / 3; overflow: hidden;
}
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.35s ease; }
.product-card:hover .product-img img { transform: scale(1.04); }
.product-info { padding: 18px 20px 20px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.product-name { font-weight: 600; font-size: 0.95rem; letter-spacing: 0.01em; }
.product-spec {
  font-family: var(--mono); font-size: 0.76rem; color: var(--text-2); letter-spacing: 0.04em;
  display: flex; flex-direction: column; gap: 3px; line-height: 1.5;
}
.product-foot {
  margin-top: auto; padding-top: 12px;
  display: flex; justify-content: space-between; align-items: baseline;
}
.product-price { font-family: var(--mono); font-size: 0.95rem; color: #fff; }
.product-link { font-family: var(--mono); font-size: 0.7rem; color: var(--accent); letter-spacing: 0.08em; }

/* ---------- category cards ---------- */

.cat-card { padding: 0; display: flex; flex-direction: column; }
.cat-img { aspect-ratio: 16 / 8; overflow: hidden; border-bottom: 1px solid var(--line-soft); }
.cat-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.35s ease; }
.cat-card:hover .cat-img img { transform: scale(1.03); }
.cat-info { padding: 20px 22px 24px; }
.cat-top { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; }
.cat-count { font-size: 0.68rem; color: var(--text-3); letter-spacing: 0.1em; }
.cat-info p { font-size: 0.9rem; }
.cat-info .product-link { display: inline-block; margin-top: 14px; }

/* ---------- services ---------- */

.service-rows { border-top: 1px solid var(--line-soft); }
.service-row {
  display: grid; grid-template-columns: 90px 1fr 60px; align-items: center;
  padding: 34px 8px;
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.2s ease, padding 0.2s ease;
}
.service-row:hover { background: var(--panel); padding-left: 18px; padding-right: 0; }
.service-row .num { color: var(--accent); font-size: 0.85rem; letter-spacing: 0.14em; }
.service-row h3 { font-size: 1.15rem; margin-bottom: 8px; }
.service-row p { font-size: 0.92rem; max-width: 68ch; }
.service-arrow {
  font-size: 1.3rem; color: var(--text-3); text-align: right;
  transition: color 0.2s ease, transform 0.2s ease;
}
.service-row:hover .service-arrow { color: var(--accent); transform: translateX(6px); }

.sol-block {
  display: grid; grid-template-columns: 90px 1fr; gap: 0 8px;
  padding: 44px 0; border-bottom: 1px solid var(--line-soft);
}
.sol-block .num { color: var(--accent); font-size: 0.85rem; letter-spacing: 0.14em; padding-top: 6px; }
.sol-block h2 { margin-bottom: 14px; }
.sol-block p { max-width: 75ch; margin-bottom: 22px; }
.sol-block .btn { margin-top: 2px; }

/* ---------- stats ---------- */

.stats-band { border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); background: var(--bg-alt); }
.stat { border-left: 1px solid var(--line); padding: 8px 0 8px 20px; }
.grid > .stat:first-child { border-left: 0; padding-left: 0; }
.stat-num { display: block; font-size: clamp(1.9rem, 3.4vw, 2.8rem); font-weight: 600; letter-spacing: -0.01em; }
.stat-label { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-3); }

/* ---------- about ---------- */

.about-strip {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 64px; align-items: center;
}
.about-strip p { margin-bottom: 26px; }
.about-media { border: 1px solid var(--line-soft); border-radius: 2px; overflow: hidden; }
.about-media img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }

.about-page { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 64px; align-items: start; }
.about-page p { margin-bottom: 20px; }

/* ---------- contact ---------- */

.contact-layout { display: grid; grid-template-columns: 1.5fr 1fr; gap: 32px; align-items: start; }
.contact-side { display: flex; flex-direction: column; gap: 16px; }
.contact-card h3 { margin: 10px 0 4px; font-size: 1.1rem; }
.contact-card p { font-size: 0.9rem; }
.contact-card a { color: var(--accent); }
.contact-card a:hover { text-decoration: underline; }

.quote-form { padding: 34px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 7px; margin-bottom: 18px; }
.form-group label {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-3);
}
.form-group input, .form-group select, .form-group textarea {
  background: #0a0a0c; color: #fff;
  border: 1px solid var(--line-soft); border-radius: 2px;
  padding: 13px 14px; font-family: var(--sans); font-size: 0.95rem;
  transition: border-color 0.15s ease;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--accent);
}
.form-group textarea { resize: vertical; }
.form-note { margin-top: 16px; font-size: 0.62rem; letter-spacing: 0.14em; color: var(--text-3); }

/* ---------- CTA band ---------- */

.cta-band {
  padding: 110px 0;
  background:
    radial-gradient(60% 90% at 80% 10%, var(--accent-dim), transparent),
    var(--bg-alt);
  border-top: 1px solid var(--line-soft);
  text-align: left;
}
.cta-band .kicker { margin-bottom: 14px; }
.cta-band h2 { font-size: clamp(1.8rem, 3.6vw, 3rem); max-width: 16ch; }
.cta-band p { margin: 16px 0 30px; max-width: 52ch; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- footer ---------- */

.footer { border-top: 1px solid var(--line-soft); background: var(--bg); padding: 72px 0 0; }
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1.2fr 0.8fr 1fr; gap: 48px;
  padding-bottom: 56px;
}
.footer-logo { height: 22px; width: auto; filter: invert(1); margin-bottom: 18px; }
.footer-brand p { font-size: 0.86rem; max-width: 34ch; margin-bottom: 12px; }
.footer-addr { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.16em; color: var(--text-3); text-transform: uppercase; }
.footer-col h4 {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--text-3); margin-bottom: 18px;
}
.footer-col li { margin-bottom: 10px; font-size: 0.88rem; }
.footer-col a { color: var(--text-2); }
.footer-col a:hover { color: #fff; }
.footer-col .mono { font-size: 0.64rem; letter-spacing: 0.16em; color: var(--text-3); }
.footer-bottom {
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  border-top: 1px solid var(--line-soft);
  padding: 22px 0;
  font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.12em;
  color: var(--text-3); text-transform: uppercase;
}

/* ---------- reveal animation ---------- */

.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- nav dropdowns (desktop) ---------- */

.nav-drop { position: relative; }
.nav-drop-btn {
  background: none; border: 0; cursor: pointer;
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-2);
  padding: 10px 13px; display: inline-flex; align-items: center; gap: 7px;
}
.nav-drop-btn::after {
  content: ""; width: 5px; height: 5px;
  border-right: 1px solid currentColor; border-bottom: 1px solid currentColor;
  transform: rotate(45deg) translateY(-1px); transition: transform 0.15s ease;
}
.nav-drop:hover .nav-drop-btn, .nav-drop:focus-within .nav-drop-btn { color: #fff; }
.nav-drop:hover .nav-drop-btn::after, .nav-drop:focus-within .nav-drop-btn::after { transform: rotate(225deg) translateY(-1px); }

.nav-drop-menu {
  position: absolute; top: 100%; left: 0; z-index: 110;
  min-width: 240px;
  background: rgba(6, 6, 8, 0.97);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 8px 0;
  opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
}
.nav-drop:hover .nav-drop-menu, .nav-drop:focus-within .nav-drop-menu,
.nav-drop.open .nav-drop-menu {
  opacity: 1; visibility: visible; transform: none;
}
.nav-drop-menu a {
  display: block; padding: 12px 20px;
  font-size: 0.85rem; font-weight: 500; letter-spacing: 0.03em;
  color: var(--text-2); white-space: nowrap;
}
.nav-drop-menu a:hover { color: #fff; background: rgba(255, 255, 255, 0.05); }

.drawer-group {
  padding: 20px 0 4px; font-size: 0.62rem; letter-spacing: 0.2em;
  color: var(--text-3); text-transform: uppercase;
}
.drawer-group:first-child { padding-top: 4px; }

/* ---------- slim hero / tight section ---------- */

.hero-slim { min-height: 72vh; }
.section-tight { padding: 64px 0; }

/* ---------- category overview cards ---------- */

.cat-over-card { display: flex; flex-direction: column; gap: 12px; }
.cat-over-top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.sub-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.sub-tag {
  font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--line); border-radius: 2px;
  padding: 4px 8px; color: var(--text-2);
}
.sub-tag.soon { border-style: dashed; color: var(--text-3); }
.cat-over-card p { font-size: 0.85rem; }
.cat-over-card.coming { border-style: dashed; opacity: 0.85; }
.cat-over-card.coming:hover { opacity: 1; }

/* ---------- product tiles (CUAV-style grids) ---------- */

.tile-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px;
}
.tile {
  background: var(--panel); border: 1px solid var(--line-soft); border-radius: 2px;
  padding: 18px 20px;
  display: flex; flex-direction: column; gap: 14px;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.tile:hover { border-color: var(--line); background: var(--panel-2); }
.tile-name { font-weight: 600; font-size: 0.92rem; letter-spacing: 0.01em; }
.tile-foot {
  margin-top: auto; display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.tile-sub {
  font-size: 0.62rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); border: 1px solid rgba(127, 212, 193, 0.45);
  padding: 3px 7px; border-radius: 2px;
}
.tile-price { font-size: 0.82rem; color: #fff; }
.tile-link { margin-left: auto; font-size: 0.66rem; letter-spacing: 0.1em; color: var(--text-3); }
.tile:hover .tile-link { color: var(--accent); }

/* ---------- coming soon band ---------- */

.coming-band {
  border: 1px dashed var(--line); border-radius: 2px;
  padding: 44px 40px;
  display: flex; flex-direction: column; gap: 12px; align-items: flex-start;
  background: var(--bg-alt);
}
.coming-band .mono { font-size: 0.68rem; letter-spacing: 0.2em; color: var(--accent); }
.coming-band p { max-width: 60ch; }
.coming-band .btn { margin-top: 10px; }

/* ---------- support cards ---------- */

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.sup-card .num { color: var(--accent); font-size: 0.78rem; letter-spacing: 0.14em; }
.sup-card h3 { margin: 14px 0 10px; }
.sup-card p { font-size: 0.88rem; }

/* ---------- download tables ---------- */

.dl-table {
  width: 100%; border-collapse: collapse;
  border: 1px solid var(--line-soft);
}
.dl-table th {
  text-align: left; font-family: var(--mono); font-size: 0.64rem;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-3);
  padding: 14px 18px; border-bottom: 1px solid var(--line);
  background: var(--bg-alt);
}
.dl-table td {
  padding: 15px 18px; border-bottom: 1px solid var(--line-soft);
  font-size: 0.9rem; color: var(--text-2);
}
.dl-table tr:last-child td { border-bottom: 0; }
.dl-table tr:hover td { background: var(--panel); color: var(--text); }
.dl-table td.soon-tag { color: var(--text-3); letter-spacing: 0.12em; font-size: 0.64rem; }
.dl-table a { color: var(--accent); }

/* ---------- responsive ---------- */

@media (max-width: 1080px) {
  .grid-4, .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .tile-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 900px) {
  .nav-links, .nav-cta { display: none; }
  .nav-burger { display: block; margin-left: auto; }
  .nav-inner { gap: 16px; }
  .about-strip, .about-page { grid-template-columns: 1fr; gap: 36px; }
  .contact-layout { grid-template-columns: 1fr; }
  .sol-block { grid-template-columns: 1fr; gap: 10px; }
  .service-row { grid-template-columns: 56px 1fr; }
  .service-arrow { display: none; }
}

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .grid-4, .grid-3, .grid-2, .grid-cats, .tile-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .hero { min-height: 88vh; }
  .hero-meta { gap: 18px; }
  .footer-grid { grid-template-columns: 1fr; }
  .stat { border-left: 0; padding-left: 0; border-top: 1px solid var(--line-soft); padding-top: 18px; }
  .grid > .stat:first-child { border-top: 0; padding-top: 0; }
  .cta-band { padding: 80px 0; }
}

/* ---------- v4: category dropdowns & grouped category pages ---------- */

.nav-drop-btn.bare::after { display: none; }
.nav-links .nav-drop.active .nav-drop-btn { color: #fff; }

.drawer-sub {
  padding-left: 22px !important;
  font-size: 0.8rem !important;
  color: var(--text-3) !important;
}

.group-head {
  display: flex; align-items: baseline; gap: 16px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 14px;
}
.group-head h2 { font-size: 1.35rem; }

.tile-coming { border-style: dashed; background: transparent; }
.tile-coming .tile-sub { color: var(--text-3); border-color: var(--line); }
.tile-coming:hover { background: var(--panel); }

section[id] { scroll-margin-top: 92px; }

/* ---------- v5: product tiles with images + specs (no prices) ---------- */

.tile-grid { grid-template-columns: repeat(3, 1fr); gap: 18px; }
.tile { padding: 0; overflow: hidden; }
.tile-img {
  aspect-ratio: 4 / 3; overflow: hidden;
  background: radial-gradient(80% 80% at 50% 40%, #1d1d22 0%, #131316 70%, #101013 100%);
  border-bottom: 1px solid var(--line-soft);
}
.tile-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.35s ease; }
.tile:hover .tile-img img { transform: scale(1.04); }
.tile-body {
  padding: 16px 18px 18px;
  display: flex; flex-direction: column; gap: 9px; flex: 1;
}
.tile-specs {
  display: flex; flex-direction: column; gap: 3px;
  font-size: 0.72rem; letter-spacing: 0.02em; color: var(--text-2);
  line-height: 1.5;
}
.tile.tile-text { padding: 18px 20px; }
.tile.tile-text .tile-foot { margin-top: auto; }
@media (max-width: 1080px) { .tile-grid { grid-template-columns: repeat(2, 1fr); } }

/* ---------- v6: nav category links with dropdowns ---------- */

.nav-drop-link {
  display: inline-block; padding: 10px 9px;
  color: var(--text-2); white-space: nowrap;
  transition: color 0.15s ease;
}
.nav-drop-link:hover, .nav-drop:hover .nav-drop-link { color: #fff; }
.nav-drop.active > .nav-drop-link { color: #fff; }
.nav-drop.active > .nav-drop-link::after {
  content: ""; display: block; height: 1px; background: var(--accent); margin-top: 6px;
}
a.nav-item.active { color: #fff; }

/* ---------- v19: inquiry form（Triumphums 同款询价系统） ---------- */

.quote-form .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.quote-form .field { display: flex; flex-direction: column; gap: 8px; }
.quote-form .field.full { grid-column: 1 / -1; }
.quote-form .field label {
  font-family: var(--mono); font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-3);
}
.quote-form .field label .req { color: var(--accent); }
.quote-form .field input, .quote-form .field select, .quote-form .field textarea {
  width: 100%;
  padding: 13px 14px;
  background: #0a0a0c;
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  color: #fff;
  font-family: var(--sans);
  font-size: 0.95rem;
  transition: border-color 0.15s ease;
}
.quote-form .field textarea { min-height: 140px; resize: vertical; }
.quote-form .field input::placeholder, .quote-form .field textarea::placeholder { color: var(--text-3); }
.quote-form .field input:focus, .quote-form .field select:focus, .quote-form .field textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.quote-form .field select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--text-3) 50%),
    linear-gradient(135deg, var(--text-3) 50%, transparent 50%);
  background-position: calc(100% - 21px) 50%, calc(100% - 16px) 50%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
}
.quote-form .field select option, .quote-form .field optgroup { background: #0c0c0e; color: #fff; }

.form-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
  margin-top: 26px;
  flex-wrap: wrap;
}
.form-foot .form-note { margin-top: 0; font-size: 0.72rem; max-width: 34ch; }

.hp-field { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }

.form-status {
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 2px;
  font-size: 0.9rem;
  display: none;
}
.form-status.ok {
  display: block;
  background: rgba(72, 187, 120, 0.1);
  border: 1px solid rgba(72, 187, 120, 0.35);
  color: #7fdba8;
}
.form-status.err {
  display: block;
  background: rgba(255, 107, 107, 0.08);
  border: 1px solid rgba(255, 107, 107, 0.35);
  color: #ff9d9d;
}

#form-submit:disabled { opacity: 0.55; cursor: wait; }

@media (max-width: 640px) { .quote-form .form-grid { grid-template-columns: 1fr; } }

/* ---------- v21: about page location map ---------- */

.map-frame {
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  overflow: hidden;
  background: var(--panel);
}
.map-frame iframe {
  display: block;
  width: 100%;
  height: 440px;
  border: 0;
  filter: grayscale(1) contrast(1.08);
}
.map-note {
  margin-top: 14px;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--text-3);
}
.map-note a { color: var(--accent); }
@media (max-width: 640px) { .map-frame iframe { height: 300px; } }

/* ---------- v33: documents search ---------- */

.doc-search { display: flex; align-items: center; gap: 16px; margin-bottom: 22px; flex-wrap: wrap; }
.doc-search input {
  flex: 1; min-width: 240px; max-width: 460px;
  background: #0a0a0c;
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  padding: 13px 14px;
  color: #fff;
  font-family: var(--sans);
  font-size: 0.95rem;
  transition: border-color 0.15s ease;
}
.doc-search input:focus { outline: none; border-color: var(--accent); }
.doc-search input::placeholder { color: var(--text-3); }
.doc-search input::-webkit-search-cancel-button { -webkit-appearance: none; }
.doc-search-count { font-size: 0.66rem; letter-spacing: 0.14em; color: var(--text-3); text-transform: uppercase; }
.doc-empty {
  display: none;
  margin-top: 18px;
  padding: 36px 20px;
  border: 1px dashed var(--line);
  border-radius: 2px;
  text-align: center;
  color: var(--text-2);
}
.doc-empty a { color: var(--accent); }