/* =========================================================
   Precisenova 华琢微纳 — site.css
   Light, precise, engineering-grade visual system
   ========================================================= */

/* Brand palette sampled from the printed stationery:
   indigo #2A2680 · blue #005EAC · teal #52B3C4 · lavender #A3ABD5 · ink #221714 */
:root {
  --ink: #15122e;
  --ink-soft: #33305c;
  --muted: #5f6390;
  --muted-2: #8d92b4;
  --line: #e3e5f2;
  --line-strong: #ccd1e6;
  --paper: #ffffff;
  --paper-2: #f6f7fc;
  --paper-3: #eef0f9;
  --accent: #2a2680;
  --accent-deep: #1b1760;
  --accent-bright: #005eac;
  --teal: #52b3c4;
  --lav: #a3abd5;
  --grad: linear-gradient(115deg, #2a2680 0%, #1e4c9c 46%, #005eac 76%, #4aa9c0 100%);
  --max: 1180px;
  --nav-h: 74px;
  --r: 3px;
  --shadow-s: 0 1px 2px rgba(21, 18, 46, .05), 0 8px 24px -12px rgba(21, 18, 46, .14);
  --shadow-m: 0 30px 70px -32px rgba(21, 18, 46, .34);
  --font: "MiSans", "Inter", "Helvetica Neue", -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

::selection { background: rgba(25, 167, 184, .2); }

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------------- Header ---------------- */
.site-head {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 90;
  height: var(--nav-h);
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s, box-shadow .3s;
}

.site-head.is-stuck {
  border-bottom-color: var(--line);
  background: rgba(255, 255, 255, .94);
  box-shadow: 0 6px 24px -20px rgba(10, 18, 25, .5);
}

.head-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* official lockup, cut out of the printed stationery (transparent PNG, 3x) */
.brand-logo {
  display: block;
  height: 36px;
  width: auto;
  flex-shrink: 0;
}

.brand-logo-rev {
  display: block;
  height: 34px;
  width: auto;
}

.brand-mark {
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
}

.brand-txt { display: flex; flex-direction: column; line-height: 1.15; }

.brand-cn {
  font-size: 17px;
  font-weight: 650;
  letter-spacing: .16em;
}

.brand-en {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .3em;
  color: var(--muted-2);
  text-transform: uppercase;
  margin-top: 3px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav a {
  position: relative;
  padding: 8px 14px;
  font-size: 14.5px;
  color: var(--ink-soft);
  border-radius: var(--r);
  transition: color .2s, background .2s;
}

.nav a:hover { color: var(--accent-deep); background: var(--paper-2); }

.nav a.is-active { color: var(--accent-deep); font-weight: 600; }

.nav a.is-active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: var(--grad);
  border-radius: 2px;
}

.nav .nav-en {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
  border-left: 1px solid var(--line);
  margin-left: 8px;
  padding-left: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 46px;
  padding: 0 22px;
  border: 1px solid var(--ink);
  border-radius: var(--r);
  background: var(--ink);
  color: #fff;
  font-size: 14.5px;
  font-weight: 550;
  letter-spacing: .02em;
  cursor: pointer;
  transition: transform .25s cubic-bezier(.2, .7, .2, 1), box-shadow .25s, background .25s, color .25s, border-color .25s;
}

.btn:hover { transform: translateY(-2px); box-shadow: 0 16px 30px -18px rgba(10, 18, 25, .7); }

.btn svg { width: 15px; height: 15px; transition: transform .25s; }
.btn:hover svg { transform: translateX(3px); }

.btn-primary {
  background: var(--grad);
  border-color: transparent;
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn-ghost:hover {
  border-color: var(--ink);
  background: var(--paper-2);
  box-shadow: none;
}

.btn-sm { height: 40px; padding: 0 18px; font-size: 13.5px; }

.nav-cta { display: flex; align-items: center; gap: 10px; }

.burger {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r);
  background: #fff;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}

.burger span {
  display: block;
  width: 17px;
  height: 1.5px;
  background: var(--ink);
  position: relative;
  transition: background .2s;
}

.burger span::before,
.burger span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 17px;
  height: 1.5px;
  background: var(--ink);
  transition: transform .3s, top .3s;
}

.burger span::before { top: -6px; }
.burger span::after { top: 6px; }

body.nav-open .burger span { background: transparent; }
body.nav-open .burger span::before { top: 0; transform: rotate(45deg); }
body.nav-open .burger span::after { top: 0; transform: rotate(-45deg); }

/* ---------------- Shared type ---------------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 22px;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--accent);
  opacity: .6;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 600;
  letter-spacing: -.015em;
  line-height: 1.2;
  color: var(--ink);
}

h1 { font-size: clamp(2.5rem, 5.2vw, 4.1rem); letter-spacing: -.028em; }
h2 { font-size: clamp(1.75rem, 3.1vw, 2.6rem); }
h3 { font-size: 1.16rem; }

.lead {
  font-size: clamp(1rem, 1.35vw, 1.13rem);
  color: var(--muted);
  line-height: 1.85;
  max-width: 62ch;
}

.section { padding: 104px 0; }
.section.tight { padding: 76px 0; }
.section.tint { background: var(--paper-2); }
.section.dark { background: var(--ink); color: #dfe6ec; }
.section.dark h2, .section.dark h3 { color: #fff; }
.section.dark .lead { color: #9fb0bd; }

.sec-head { margin-bottom: 56px; max-width: 720px; }
.sec-head.split {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 48px;
  max-width: none;
}

.sec-num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--muted-2);
  display: block;
  margin-bottom: 14px;
}

/* ---------------- Hero ---------------- */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + 96px) 0 88px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 520px at 80% 8%, rgba(0, 94, 172, .11), transparent 70%),
    radial-gradient(760px 460px at 4% 86%, rgba(42, 38, 128, .09), transparent 72%),
    radial-gradient(520px 320px at 52% 100%, rgba(82, 179, 196, .1), transparent 74%);
}

/* pixel field — the stationery's auxiliary graphic */


.hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(10, 18, 25, .045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(10, 18, 25, .045) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  gap: 64px;
  align-items: center;
}

.hero h1 { margin-bottom: 26px; }

.hero h1 .grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero .lead { font-size: 1.1rem; max-width: 50ch; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.hero-note {
  margin-top: 22px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--muted-2);
}

.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 460px;
  margin-left: auto;
  width: 100%;
}

.hero-visual svg { width: 100%; height: 100%; }

.spin-slow { transform-origin: 230px 230px; animation: spin 90s linear infinite; }
.spin-rev { transform-origin: 230px 230px; animation: spin 140s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------------- Stat strip ---------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}

.stat {
  padding: 30px 26px 26px;
  border-right: 1px solid var(--line);
}

.stat:last-child { border-right: 0; }
.stat:first-child { padding-left: 0; }

.stat-val {
  font-family: var(--mono);
  font-size: clamp(1.5rem, 2.3vw, 2rem);
  font-weight: 500;
  letter-spacing: -.02em;
  color: var(--ink);
  line-height: 1.1;
}

.stat-val em {
  font-style: normal;
  font-size: .58em;
  color: var(--accent);
  margin-left: 3px;
}

.stat-key {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .02em;
}

/* ---------------- Capability grid ---------------- */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.cap {
  padding: 34px 32px 38px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
  transition: background .35s, transform .35s;
  position: relative;
}

.cap:hover { background: var(--paper-2); }

.cap-ico {
  width: 40px;
  height: 40px;
  margin-bottom: 22px;
  color: var(--accent);
}

.cap h3 { margin-bottom: 10px; }
.cap p { margin: 0; font-size: 14.5px; color: var(--muted); line-height: 1.78; }

.cap-tags {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .04em;
  color: var(--ink-soft);
  background: var(--paper-3);
  border: 1px solid var(--line);
  padding: 3px 8px;
  border-radius: 2px;
}

/* ---------------- Process rail ---------------- */
.rail {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.rail-step {
  background: #fff;
  padding: 30px 26px 34px;
  position: relative;
}

.rail-step span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--accent);
}

.rail-step h3 {
  font-size: 1.02rem;
  margin: 12px 0 8px;
}

.rail-step p {
  margin: 0;
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.72;
}

/* ---------------- Product cards ---------------- */
.prod-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.prod-grid.cols2 { grid-template-columns: repeat(2, 1fr); }

.prod {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: #fff;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .4s cubic-bezier(.2, .7, .2, 1), box-shadow .4s, border-color .3s;
}

.prod:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-m);
  border-color: var(--line-strong);
}

.prod-thumb {
  aspect-ratio: 16 / 10;
  background: linear-gradient(150deg, #f4f6fd 0%, #e7eaf8 100%);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.prod-thumb svg { position: absolute; inset: 0; width: 100%; height: 100%; }

.prod-body { padding: 24px 26px 28px; flex: 1; display: flex; flex-direction: column; }
.prod-body h3 { margin-bottom: 8px; }
.prod-body p { margin: 0 0 18px; font-size: 14px; color: var(--muted); flex: 1; }

.spec-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.spec-list li {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
}

.spec-list dt, .spec-list .k { color: var(--muted-2); }
.spec-list .v {
  font-family: var(--mono);
  color: var(--ink);
  text-align: right;
}

/* ---------------- Table ---------------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); background: #fff; }

table.spec {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
  font-size: 14px;
}

table.spec th {
  text-align: left;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  padding: 16px 20px;
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

table.spec td {
  padding: 17px 20px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  vertical-align: top;
}

table.spec tr:last-child td { border-bottom: 0; }
table.spec td:first-child { font-weight: 550; color: var(--ink); white-space: nowrap; }
table.spec tbody tr:hover td { background: #fafbff; }

/* ---------------- Feature (split) ---------------- */
.split-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.split-2.flip .split-media { order: 2; }

.feature-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.feature-list li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 14px;
}

.feature-list .fi {
  width: 22px;
  height: 22px;
  margin-top: 3px;
  color: var(--accent);
}

.feature-list h4 {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 4px;
}

.feature-list p { margin: 0; font-size: 14px; color: var(--muted); line-height: 1.75; }

.media-frame {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: linear-gradient(160deg, #f8f9fe, #e9ecf8);
  aspect-ratio: 4 / 3;
  position: relative;
  overflow: hidden;
}

.media-frame svg { position: absolute; inset: 0; width: 100%; height: 100%; }

/* ---------------- Timeline ---------------- */
.timeline { border-top: 1px solid var(--line); margin-top: 8px; }

.tl-item {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 32px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.tl-year {
  font-family: var(--mono);
  font-size: 20px;
  letter-spacing: .04em;
  color: var(--accent);
  padding-top: 2px;
}

.tl-body h4 { font-size: 15.5px; margin: 0 0 6px; }
.tl-body p { margin: 0; font-size: 14px; color: var(--muted); }

/* ---------------- CTA band ---------------- */
.cta-band {
  background: var(--grad);
  color: #fff;
  padding: 76px 0;
  position: relative;
  overflow: hidden;
}

/* pixel mosaic bleeding off the CTA band, straight from the stationery */
.cta-band::after {
  content: "";
  position: absolute;
  right: -30px;
  top: 50%;
  width: 460px;
  height: 460px;
  transform: translateY(-50%);
  background: url("../img/mosaic.png") no-repeat center / contain;
  opacity: .5;
  mix-blend-mode: soft-light;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(circle at 68% 50%, #000 26%, transparent 74%);
  mask-image: radial-gradient(circle at 68% 50%, #000 26%, transparent 74%);
}

.cta-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-inner h2 { color: #fff; max-width: 22ch; }
.cta-inner p { margin: 12px 0 0; color: rgba(255, 255, 255, .82); font-size: 15px; }

.cta-band .btn {
  background: #fff;
  border-color: #fff;
  color: var(--accent-deep);
  flex-shrink: 0;
}

.cta-band .btn:hover { box-shadow: 0 18px 40px -20px rgba(0, 0, 0, .55); }

/* ---------------- Contact ---------------- */
.contact-grid {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: 64px;
  align-items: start;
}

.info-list { border-top: 1px solid var(--line); margin-top: 40px; }

.info-row {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.info-row .k {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted-2);
  padding-top: 4px;
}

.info-row .v { font-size: 15px; color: var(--ink); }
.info-row .v small { display: block; color: var(--muted); font-size: 13px; margin-top: 3px; }

/* ---------------- WeChat QR ---------------- */
.qr-wrap {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.qr-wrap img {
  display: block;
  width: 132px;
  height: 132px;
  padding: 5px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: var(--shadow-s);
}

.qr-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--muted);
}

form.inq {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: #fff;
  padding: 34px;
  box-shadow: var(--shadow-s);
}

.field { margin-bottom: 18px; }

.field label {
  display: block;
  font-size: 12.5px;
  font-weight: 550;
  color: var(--ink-soft);
  margin-bottom: 7px;
  letter-spacing: .02em;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: #fff;
  padding: 11px 13px;
  font-family: inherit;
  font-size: 14.5px;
  color: var(--ink);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}

.field textarea { resize: vertical; min-height: 108px; }

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--accent-bright);
  box-shadow: 0 0 0 3px rgba(0, 94, 172, .15);
}

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-note { font-size: 12px; color: var(--muted-2); margin: 14px 0 0; line-height: 1.6; }

/* ---------------- Page hero (sub pages) ---------------- */
.page-hero {
  padding: calc(var(--nav-h) + 74px) 0 64px;
  border-bottom: 1px solid var(--line);
  background: var(--paper-2);
  position: relative;
  overflow: hidden;
}

.page-hero .hero-grid { opacity: .7; }

.page-hero::after {
  content: "";
  position: absolute;
  right: -38px;
  bottom: -16px;
  width: 264px;
  height: 264px;
  background: url("../img/mosaic.png") no-repeat center / contain;
  opacity: .9;
  pointer-events: none;
}

@media (max-width: 860px) {
  .page-hero::after { width: 150px; height: 150px; right: -40px; bottom: -30px; opacity: .75; }
}

.page-hero-inner { position: relative; }

/* keep page-hero text left-aligned with the grid, capped for line length */
.page-hero-inner h1,
.page-hero-inner .lead,
.page-hero-inner .crumb,
.page-hero-inner .hero-actions { max-width: 760px; }

.page-hero h1 { font-size: clamp(2.1rem, 4vw, 3.2rem); margin-bottom: 20px; }

.crumb {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted-2);
  text-transform: uppercase;
  margin-bottom: 26px;
  display: flex;
  gap: 10px;
  align-items: center;
}

.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--accent); }
.crumb i { font-style: normal; opacity: .5; }

/* ---------------- Footer ---------------- */
.site-foot {
  background: #0b0920;
  color: #a7abc9;
  padding: 72px 0 34px;
  font-size: 14px;
  position: relative;
  overflow: hidden;
}

.site-foot::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -110px;
  width: 420px;
  height: 420px;
  background: url("../img/mosaic.png") no-repeat center / contain;
  opacity: .16;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(circle at 60% 60%, #000 20%, transparent 75%);
  mask-image: radial-gradient(circle at 60% 60%, #000 20%, transparent 75%);
}

.site-foot > * { position: relative; z-index: 1; }

.foot-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
  gap: 48px;
  padding-bottom: 52px;
  border-bottom: 1px solid rgba(255, 255, 255, .09);
}

.site-foot .brand-cn { color: #fff; }
.site-foot .brand-en { color: #7d82a8; }

.foot-desc { margin: 20px 0 0; max-width: 34ch; line-height: 1.8; color: #8b90b4; font-size: 13.5px; }

.foot-col h4 {
  color: #fff;
  font-size: 12px;
  font-family: var(--mono);
  letter-spacing: .18em;
  text-transform: uppercase;
  font-weight: 500;
  margin-bottom: 18px;
}

.foot-col a {
  display: block;
  padding: 6px 0;
  color: #a7abc9;
  font-size: 13.5px;
  transition: color .2s;
}

.foot-col a:hover { color: #fff; }

.foot-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding-top: 26px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: #7a7fa4;
  font-family: var(--mono);
  letter-spacing: .04em;
}

/* ---------------- Reveal ---------------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .8s cubic-bezier(.2, .7, .2, 1), transform .8s cubic-bezier(.2, .7, .2, 1);
}

.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .spin-slow, .spin-rev { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------------- Responsive ---------------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .hero-visual { max-width: 340px; margin: 0 auto; }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .rail { grid-template-columns: repeat(2, 1fr); }
  .split-2, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .split-2.flip .split-media { order: 0; }
  .foot-top { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 860px) {
  :root { --nav-h: 64px; }
  .wrap { padding: 0 22px; }
  .nav {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 22px 22px;
    gap: 2px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s, transform .25s;
  }
  body.nav-open .nav { opacity: 1; transform: none; pointer-events: auto; }
  .nav a { padding: 13px 6px; border-bottom: 1px solid var(--line); border-radius: 0; }
  .nav a.is-active::after { display: none; }
  .nav .nav-en { border-left: 0; margin: 6px 0 0; padding-left: 6px; border-bottom: 0; }
  .burger { display: inline-flex; }
  .nav-cta .btn { display: none; }
  .brand-logo, .brand-logo-rev { height: 30px; }
  .cta-band::after { width: 300px; height: 300px; opacity: .35; }
  .section { padding: 68px 0; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat { border-bottom: 1px solid var(--line); }
  .stat:nth-child(2n) { border-right: 0; }
  .stat:nth-child(3), .stat:nth-child(4) { border-bottom: 0; }
  .stat:first-child { padding-left: 26px; }
  .sec-head.split { flex-direction: column; align-items: flex-start; gap: 24px; }
  .cta-band { padding: 56px 0; }
  .cta-inner h2 { font-size: 1.7rem; }
}

@media (max-width: 640px) {
  .cap-grid { grid-template-columns: 1fr; }
  .prod-grid, .prod-grid.cols2 { grid-template-columns: 1fr; }
  .rail { grid-template-columns: 1fr; }
  .tl-item { grid-template-columns: 1fr; gap: 8px; padding: 22px 0; }
  .field-row { grid-template-columns: 1fr; }
  form.inq { padding: 24px; }
  .foot-top { grid-template-columns: 1fr; }
  .hero { padding-top: calc(var(--nav-h) + 60px); }
  h1 { font-size: 2.15rem; }
  .brand-logo, .brand-logo-rev { height: 28px; }
  .page-hero::after { width: 180px; height: 180px; opacity: .16; }
  .cta-band::after { display: none; }
  .info-row { grid-template-columns: 84px 1fr; }
}