/* ============================================================
   Tianke Glass — European industrial B2B design system
   Ink #0E1418 | Graphite #1B2328 | Steel #5A6772
   Frost #F5F7F8 | Brass #B98346 | Font: Inter
   ============================================================ */
:root {
  --ink: #0E1418;
  --graphite: #1B2328;
  --graphite-2: #222C33;
  --steel: #5A6772;
  --steel-light: #8A97A1;
  --frost: #F5F7F8;
  --frost-2: #EDF0F2;
  --brass: #B98346;
  --brass-dark: #9C6D38;
  --white: #FFFFFF;
  --line: #E1E6E9;
  --line-dark: rgba(255, 255, 255, 0.10);
  --text: #232B31;
  --text-muted: #5C6870;
  --radius: 4px;
  --maxw: 1180px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { font-weight: 600; line-height: 1.22; letter-spacing: -0.015em; }
h1 { font-size: clamp(1.8rem, 4.2vw, 3.3rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); }
h3 { font-size: 1.12rem; }

/* Prevent grid/flex item blowout on narrow screens */
.hero-grid > *, .split > *, .grid-2 > *, .grid-3 > *, .grid-4 > *,
.collage > *, .gallery-strip > *, .form-grid > * { min-width: 0; }

.kicker {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: 14px;
}
.section-sub { color: var(--text-muted); max-width: 720px; margin-top: 12px; font-size: 1.02rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 13px 26px;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.btn-brass { background: var(--brass); color: var(--white); }
.btn-brass:hover { background: var(--brass-dark); }
.btn-outline { border-color: rgba(255,255,255,0.35); color: var(--white); background: transparent; }
.btn-outline:hover { border-color: var(--brass); color: var(--brass); }
.btn-dark-outline { border-color: var(--steel); color: var(--ink); background: transparent; }
.btn-dark-outline:hover { border-color: var(--brass); color: var(--brass); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink);
  border-bottom: 1px solid var(--line-dark);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--white);
  white-space: nowrap;
}
.logo span { color: var(--brass); }
.logo-sub {
  display: block;
  font-size: 0.62rem;
  font-weight: 400;
  letter-spacing: 0.22em;
  color: var(--steel-light);
  text-transform: uppercase;
  margin-top: 1px;
}
.main-nav { display: flex; align-items: center; gap: 30px; }
.main-nav a {
  color: #C4CCD2;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s;
}
.main-nav a:hover { color: var(--white); }
.main-nav a.active { color: var(--white); border-bottom-color: var(--brass); }
.header-cta { margin-left: 8px; }
.header-cta .btn { padding: 10px 20px; font-size: 0.85rem; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-dark);
  border-radius: 4px;
  color: var(--white);
  font-size: 1.25rem;
  line-height: 1;
  padding: 8px 12px;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(ellipse 70% 90% at 78% 20%, rgba(185, 131, 70, 0.10), transparent 55%),
    radial-gradient(ellipse 60% 80% at 15% 100%, rgba(90, 103, 114, 0.22), transparent 60%),
    var(--ink);
  color: var(--white);
  padding: 92px 0 96px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.hero .kicker { color: var(--brass); }
.hero h1 { color: var(--white); margin-bottom: 22px; }
.hero p.lead {
  color: #B9C2C9;
  font-size: 1.1rem;
  max-width: 540px;
  margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-visual {
  position: relative;
  max-width: 430px;
  justify-self: end;
  width: 100%;
}
.hero-visual img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.14);
  box-shadow: 0 30px 70px rgba(0,0,0,0.45);
}
.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(14,20,24,0.30) 0%, transparent 40%, rgba(14,20,24,0.22) 100%);
  pointer-events: none;
}
.hero-visual figcaption {
  position: absolute;
  bottom: -30px;
  left: 2px;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel-light);
}

/* ---------- Stats strip ---------- */
.stats-strip {
  background: var(--graphite);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
  color: var(--white);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  padding: 34px 0;
}
.stat { border-left: 2px solid var(--brass); padding-left: 16px; }
.stat b { display: block; font-size: 1.28rem; font-weight: 700; letter-spacing: -0.01em; }
.stat span { font-size: 0.8rem; color: #AEB8BF; line-height: 1.45; display: block; margin-top: 3px; }

/* ---------- Sections ---------- */
.section { padding: 88px 0; }
.section-frost { background: var(--frost); }
.section-ink {
  background:
    radial-gradient(ellipse 55% 70% at 85% 10%, rgba(185,131,70,0.08), transparent 60%),
    var(--ink);
  color: var(--white);
}
.section-ink .section-sub { color: #AEB8BF; }
.section-head { max-width: 780px; margin-bottom: 48px; }
.section-head h2 { margin-bottom: 0; }
.section-tight { padding: 64px 0; }

/* ---------- Cards ---------- */
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.card:hover { border-color: var(--brass); box-shadow: 0 10px 30px rgba(14,20,24,0.08); }
.card-body { padding: 24px; }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--text-muted); font-size: 0.92rem; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* Icon-less feature block (Why Tianke) */
.feature { border-top: 2px solid var(--brass); background: var(--white); border: 1px solid var(--line); border-top: 2px solid var(--brass); border-radius: var(--radius); padding: 26px 24px; }
.feature h3 { margin-bottom: 10px; }
.feature p { color: var(--text-muted); font-size: 0.92rem; }
.feature .num { font-size: 0.78rem; font-weight: 700; color: var(--steel-light); letter-spacing: 0.1em; display: block; margin-bottom: 12px; }

/* ---------- Image frames ---------- */
.imgframe {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--frost-2);
}
.imgframe img { width: 100%; height: 100%; object-fit: cover; }
.imgframe figcaption {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel-light);
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: var(--white);
}
.dark .imgframe { border-color: var(--line-dark); background: var(--graphite); }
.dark .imgframe figcaption { background: transparent; border-top-color: var(--line-dark); color: #8A97A1; }

/* ---------- Product cards ---------- */
.product-card { display: flex; flex-direction: column; }
.product-media {
  background:
    radial-gradient(ellipse 80% 90% at 50% 0%, rgba(185,131,70,0.05), transparent 60%),
    var(--frost);
  border-bottom: 1px solid var(--line);
  height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.product-media img { max-height: 200px; width: auto; max-width: 80%; object-fit: contain; }
.product-media.drawing img { max-height: 220px; mix-blend-mode: multiply; }
.product-specs { padding: 22px 24px 24px; flex: 1; display: flex; flex-direction: column; }
.product-cap {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: 6px;
}
.product-specs h3 { font-size: 1.15rem; margin-bottom: 14px; }
.spec-table { width: 100%; font-size: 0.86rem; margin-bottom: 18px; }
.spec-table td { padding: 7px 0; border-bottom: 1px solid var(--frost-2); vertical-align: top; }
.spec-table td:first-child { color: var(--steel); width: 42%; font-weight: 500; }
.spec-table td:last-child { color: var(--text); font-weight: 500; }
.product-specs .btn { margin-top: auto; align-self: flex-start; padding: 9px 18px; font-size: 0.84rem; }

/* ---------- Split layouts ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split .imgframe { max-height: 460px; }
.split-reverse { direction: rtl; }
.split-reverse > * { direction: ltr; }

.checklist li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 13px;
  font-size: 0.95rem;
  color: var(--text);
}
.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--brass);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.65;
}
.section-ink .checklist li { color: #C9D1D6; }

/* ---------- Dark band with image ---------- */
.tech-band-img {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-dark);
}
.tech-band-img img { width: 100%; display: block; filter: brightness(0.92); }
.tech-band-img::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(14,20,24,0.35) 0%, transparent 45%, rgba(14,20,24,0.30) 100%);
}

/* ---------- Quality table ---------- */
.result-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.result-table th {
  text-align: left;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel);
  padding: 12px 16px;
  border-bottom: 2px solid var(--line);
  background: var(--frost);
}
.result-table td { padding: 14px 16px; border-bottom: 1px solid var(--line); }
.result-table .pass {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #1E7A46;
  background: #E4F3EA;
  border: 1px solid #BFDFCB;
  border-radius: 3px;
  padding: 3px 10px;
}

/* ---------- Evidence preview ---------- */
.evidence-note { font-size: 0.82rem; color: var(--text-muted); margin-top: 14px; line-height: 1.6; }

/* ---------- Markets ---------- */
.market-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
}
.market-cell { background: var(--graphite); padding: 28px 24px; }
.market-cell b { display: block; color: var(--white); font-size: 1.05rem; margin-bottom: 6px; }
.market-cell span { font-size: 0.84rem; color: #9AA5AD; }

/* ---------- CTA band ---------- */
.cta-band {
  background:
    radial-gradient(ellipse 60% 120% at 90% 50%, rgba(185,131,70,0.16), transparent 55%),
    var(--graphite);
  color: var(--white);
  padding: 72px 0;
  border-top: 1px solid var(--line-dark);
}
.cta-band h2 { margin-bottom: 12px; }
.cta-band p { color: #B9C2C9; max-width: 620px; margin-bottom: 30px; }

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
  background:
    radial-gradient(ellipse 65% 100% at 80% 0%, rgba(185,131,70,0.10), transparent 55%),
    var(--ink);
  color: var(--white);
  padding: 66px 0 60px;
  border-bottom: 1px solid var(--line-dark);
}
.page-hero h1 { font-size: clamp(1.9rem, 3.4vw, 2.7rem); margin-bottom: 14px; }
.page-hero p { color: #B9C2C9; max-width: 720px; font-size: 1.04rem; }
.breadcrumb { font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--steel-light); margin-bottom: 18px; }
.breadcrumb a { color: var(--steel-light); }
.breadcrumb a:hover { color: var(--brass); }

/* ---------- Gallery strip ---------- */
.gallery-strip { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.gallery-strip .imgframe { aspect-ratio: 1 / 1.15; }

/* ---------- Form ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 24px; }
.form-field { display: flex; flex-direction: column; }
.form-field.full { grid-column: 1 / -1; }
.form-field label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text);
  margin-bottom: 7px;
}
.form-field label span { color: var(--brass); }
.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--font);
  font-size: 0.94rem;
  color: var(--text);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px;
  transition: border-color 0.2s;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus { outline: none; border-color: var(--brass); }
.form-field textarea { min-height: 130px; resize: vertical; }
.form-note { font-size: 0.82rem; color: var(--text-muted); margin-top: 16px; }
.form-status { display: none; margin-top: 18px; padding: 14px 18px; border-radius: var(--radius); font-size: 0.9rem; }
.form-status.show { display: block; }
.form-status.ok { background: #E4F3EA; border: 1px solid #BFDFCB; color: #1E7A46; }

/* ---------- Contact info cards ---------- */
.contact-card { padding: 26px 24px; }
.contact-card .label { font-size: 0.74rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--brass); margin-bottom: 10px; }
.contact-card p { font-size: 0.93rem; }
.contact-card a { color: var(--brass); font-weight: 600; }
.contact-card a:hover { text-decoration: underline; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #93A0A9; padding: 64px 0 0; border-top: 1px solid var(--line-dark); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; }
.footer-col h4 { color: var(--white); font-size: 0.85rem; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 18px; }
.footer-col p { font-size: 0.88rem; line-height: 1.7; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: 0.88rem; color: #93A0A9; transition: color 0.2s; }
.footer-col ul a:hover { color: var(--brass); }
.footer-bottom {
  border-top: 1px solid var(--line-dark);
  padding: 22px 0;
  font-size: 0.78rem;
  color: #6B7880;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- BVS30H60 highlight ---------- */
.highlight-box {
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--brass);
  background: var(--graphite-2);
  border-radius: var(--radius);
  padding: 28px 30px;
}
.section-frost .highlight-box, .highlight-box.light {
  border-color: var(--line);
  border-left-color: var(--brass);
  background: var(--white);
}
.highlight-box h3 { margin-bottom: 10px; }
.highlight-box p { font-size: 0.94rem; }

/* ---------- Collage ---------- */
.collage { display: grid; grid-template-columns: 1.2fr 1fr; grid-template-rows: 1fr 1fr; gap: 14px; }
.collage .imgframe:first-child { grid-row: 1 / 3; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid, .split { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { justify-self: start; max-width: 400px; }
  .stats-grid { grid-template-columns: repeat(3, 1fr); row-gap: 28px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .market-row { grid-template-columns: repeat(2, 1fr); }
  .gallery-strip { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .split-reverse { direction: ltr; }
}
@media (max-width: 720px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--ink);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px 26px;
    gap: 16px;
    border-bottom: 1px solid var(--line-dark);
  }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .header-cta { display: none; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
  .market-row { grid-template-columns: 1fr; }
  .gallery-strip { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .section { padding: 60px 0; }
  .hero { padding: 60px 0 68px; }
  .hero-visual figcaption { position: static; margin-top: 10px; }
  .cta-band { padding: 54px 0; }
}

/* V2-NOW editorial system */
:root { --maxw: 1240px; --brass: #B9854D; --line: #D9DEE1; }
body { line-height: 1.65; }
h1, h2, h3 { letter-spacing: -0.035em; }
h1 { font-size: clamp(2.7rem, 5.8vw, 5.3rem); line-height: 1.06; }
h2 { font-size: clamp(2rem, 3.6vw, 3.55rem); line-height: 1.13; }
.text-lead { font-size: clamp(1.2rem, 1.7vw, 1.55rem); line-height: 1.45; color: var(--ink); margin-bottom: 22px; }
.text-body, .prose p:not(.text-lead), .chapter-copy p:not(.text-lead) { font-size: 1rem; line-height: 1.78; color: var(--text-muted); margin-bottom: 22px; }
.technical-note, .hero-note { font-size: .79rem; letter-spacing: .04em; line-height: 1.6; }
.text-link { display: inline-flex; gap: 12px; align-items: center; margin-top: 12px; border-bottom: 1px solid currentColor; padding-bottom: 5px; font-size: .9rem; font-weight: 600; }
.text-link:hover { color: var(--brass-dark); }
:focus-visible { outline: 3px solid #D0A36B; outline-offset: 4px; }
.skip-link { position: absolute; left: 16px; top: -80px; z-index: 200; padding: 10px 16px; background: #fff; color: var(--ink); }
.skip-link:focus { top: 12px; }
.form-field input:focus-visible, .form-field select:focus-visible, .form-field textarea:focus-visible { outline: 3px solid #D0A36B; outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; } }

.v2-hero { background: linear-gradient(105deg, #0e1418, #1b2328); padding: 112px 0 120px; }
.v2-hero .hero-grid { grid-template-columns: 1.2fr .8fr; gap: clamp(36px,6vw,100px); }
.v2-hero h1 { max-width: 780px; margin: 14px 0 30px; }
.v2-hero h1 em { font-style: normal; color: #B8C1C6; }
.v2-hero .hero-copy .lead { font-size: 1.12rem; line-height: 1.68; max-width: 650px; }
.v2-hero .hero-note { color: #9BA8AF; margin-top: 42px; text-transform: uppercase; }
.v2-hero .hero-visual { max-width: 440px; }
.v2-hero .hero-visual img { aspect-ratio: 4/5; object-fit: cover; object-position: center; border-radius: 0; box-shadow: none; }
.v2-hero .hero-visual::after { border-radius: 0; background: linear-gradient(180deg, transparent 58%, rgba(14,20,24,.3)); }
.v2-hero .hero-visual figcaption { bottom: -29px; }

.editorial-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(48px,8vw,140px); align-items: start; }
.editorial-grid h2 { max-width: 510px; }
.editorial-grid .prose { max-width: 660px; }
.section-graphite { background: var(--graphite); color: white; }
.section-graphite .text-lead, .section-graphite h2 { color: white; }
.section-graphite .prose p:not(.text-lead), .section-graphite .section-sub, .section-graphite .text-body { color: #ADB9C0; }
.section-graphite .text-link { color: #E5E9EC; }
.section-graphite .text-link:hover { color: #E3B77C; }
.system-chain { display: flex; flex-wrap: wrap; gap: 0; border-top: 1px solid var(--line); margin: 6px 0 26px; }
.system-chain span { padding: 14px 18px 14px 0; font-size: .77rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; }
.system-chain span:not(:last-child)::after { content: '+'; padding-left: 18px; color: var(--steel-light); }
.process-rail { display: grid; grid-template-columns: repeat(7, minmax(0,1fr)); border-top: 1px solid rgba(255,255,255,.32); counter-reset: none; }
.process-rail li { min-width: 0; padding: 30px 18px 0 0; position: relative; }
.process-rail li::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: #C8D0D5; position: absolute; top: -4px; left: 0; }
.step-index { display: block; color: #9EA9AF; font-size: .78rem; letter-spacing: .12em; margin-bottom: 48px; }
.process-rail h3 { font-size: .98rem; line-height: 1.36; letter-spacing: -.02em; margin-bottom: 12px; }
.process-rail p { color: #AAB5BC; font-size: .81rem; line-height: 1.55; }
.range-list { border-top: 1px solid var(--line); }
.range-list a { display: grid; grid-template-columns: 1fr 1.5fr 30px; align-items: baseline; padding: 22px 6px; border-bottom: 1px solid var(--line); font-size: clamp(1.25rem,2.3vw,2rem); font-weight: 600; letter-spacing: -.03em; transition: padding .2s ease, background .2s ease; }
.range-list a span { font-size: .9rem; font-weight: 500; letter-spacing: 0; color: var(--steel); }
.range-list a b { font-size: 1rem; font-weight: 400; }
.range-list a:hover { padding-left: 15px; background: var(--frost); }
.section-end { margin-top: 30px; }
.factory-pair { display: grid; grid-template-columns: 1.35fr 1fr; gap: 18px; }
.factory-pair figure { height: 390px; }
.factory-pair figure img { width: 100%; height: calc(100% - 43px); object-fit: cover; }
.evidence-figure, .technical-figure, .imgframe { border-radius: 0; box-shadow: none; }
.technical-figure img { object-fit: contain; background: #fff; }
.section .split { align-items: center; }
.section .split p.text-body { max-width: 620px; }
.section .split .text-link { margin-top: 18px; }

.tech-page-hero { padding: 90px 0 95px; background: var(--ink); }
.tech-page-hero h1 { max-width: 800px; font-size: clamp(3.2rem,7vw,6.8rem); }
.tech-page-hero p { max-width: 650px; font-size: 1.25rem; line-height: 1.6; }
.chapter-nav { background: var(--frost); border-bottom: 1px solid var(--line); }
.chapter-nav .container { display: flex; gap: 30px; overflow-x: auto; scrollbar-width: thin; }
.chapter-nav a { white-space: nowrap; font-size: .78rem; font-weight: 600; padding: 18px 0; color: var(--steel); }
.chapter-nav a:hover { color: var(--ink); }
.tech-dossier { padding-top: 32px; padding-bottom: 90px; }
.tech-chapter { display: grid; grid-template-columns: 130px minmax(0,.85fr) minmax(0,1.15fr); gap: 36px; border-bottom: 1px solid var(--line); padding: 58px 0 66px; scroll-margin-top: 90px; }
.chapter-number { color: #A0ABB2; font-size: clamp(2.1rem,4vw,3.8rem); font-weight: 500; line-height: 1; letter-spacing: -.06em; }
.chapter-title h2 { font-size: clamp(1.65rem,2.6vw,2.65rem); max-width: 390px; }
.chapter-copy { max-width: 570px; }
.chapter-copy p:last-child { margin-bottom: 0; }
.chapter-copy .technical-note { padding: 16px 0 0; border-top: 1px solid var(--line); color: var(--steel); }
.editorial-features .feature { background: transparent; border: none; border-top: 1px solid var(--line); border-radius: 0; padding: 26px 12px 8px 0; }
.editorial-features .feature .num { color: var(--steel); font-size: 1.25rem; letter-spacing: -.03em; }
.product-media.drawing img { mix-blend-mode: normal; }
.card:hover { box-shadow: none; }
.contact-card { border-radius: 0; border: none; border-top: 1px solid var(--line); padding: 22px 0; }
.contact-card:hover { border-color: var(--line); }
.page-hero:not(.tech-page-hero) { padding: 78px 0 72px; background: var(--ink); }
.page-hero:not(.tech-page-hero) h1 { font-size: clamp(2.45rem,5vw,4.7rem); max-width: 800px; }

@media (max-width: 1100px) { .process-rail { grid-template-columns: repeat(4, 1fr); row-gap: 35px; } .process-rail li:nth-child(n+5) { border-top: 1px solid rgba(255,255,255,.3); padding-top: 30px; } .process-rail li:nth-child(n+5)::before { top: -4px; } }
@media (max-width: 980px) { .v2-hero .hero-grid { grid-template-columns: 1fr; } .editorial-grid { grid-template-columns: 1fr; gap: 30px; } .tech-chapter { grid-template-columns: 70px 1fr; } .chapter-copy { grid-column: 2; } .v2-hero .hero-visual { justify-self: start; } }
@media (max-width: 720px) {
  .section { padding: 68px 0; }
  .v2-hero { padding: 70px 0 76px; }
  .v2-hero h1 { font-size: clamp(2.7rem, 10vw, 4.4rem); }
  .v2-hero .hero-visual { max-width: 100%; }
  .v2-hero .hero-visual img { aspect-ratio: 1.25; object-position: center 43%; }
  .process-rail { display: block; border-top: none; border-left: 1px solid rgba(255,255,255,.35); margin-left: 3px; }
  .process-rail li, .process-rail li:nth-child(n+5) { border-top: none; padding: 0 0 30px 27px; min-height: 100px; }
  .process-rail li::before, .process-rail li:nth-child(n+5)::before { left: -4px; top: 7px; }
  .step-index { margin-bottom: 7px; }
  .process-rail h3 { font-size: 1.08rem; margin-bottom: 5px; }
  .factory-pair { grid-template-columns: 1fr; }
  .factory-pair figure { height: 270px; }
  .range-list a { grid-template-columns: 1fr 30px; gap: 2px; }
  .range-list a span { grid-row: 2; }
  .range-list a b { grid-column: 2; grid-row: 1; }
  .tech-page-hero { padding: 70px 0; }
  .tech-page-hero h1 { font-size: clamp(3rem, 12vw, 5rem); }
  .tech-chapter { grid-template-columns: 1fr; gap: 12px; padding: 38px 0 45px; }
  .chapter-number { font-size: 2.5rem; }
  .chapter-copy { grid-column: 1; }
}

/* V2.1 reviewed: neutral three-item evidence strip */
.gallery-strip-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); max-width: 880px; }
@media (max-width: 720px) { .gallery-strip-3 { grid-template-columns: 1fr; max-width: 100%; } }