:root {
  --navy: #0f2a43;
  --navy-2: #173a5c;
  --ink: #1c2733;
  --muted: #5b6875;
  --line: #dde3ea;
  --bg: #ffffff;
  --bg-soft: #f4f6f9;
  --accent: #e8630a;
  --accent-dark: #c9540a;
  --ok: #1e7d4f;
  --radius: 8px;
  --wrap: 1140px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: var(--navy-2); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; color: var(--navy); text-wrap: balance; }
h1 { font-size: clamp(1.9rem, 4.2vw, 3rem); }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: .78rem; font-weight: 700; color: var(--accent); margin-bottom: .6em; }

/* header */
.topbar { background: var(--navy); color: #cfd9e3; font-size: .85rem; }
.topbar .wrap { display: flex; gap: 20px; justify-content: flex-end; padding-top: 6px; padding-bottom: 6px; flex-wrap: wrap; }
.topbar a { color: #fff; text-decoration: none; }
.langs { display: flex; gap: 12px; padding-left: 18px; border-left: 1px solid #3a5674; }
.langs a { color: #cfd9e3; }
.langs a[aria-current] { color: #fff; font-weight: 700; text-decoration: underline; }
html:lang(ja) body { font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, "Segoe UI", sans-serif; }
.site-header { border-bottom: 1px solid var(--line); background: #fff; position: sticky; top: 0; z-index: 20; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.logo { font-weight: 800; font-size: 1.45rem; letter-spacing: .02em; color: var(--navy); text-decoration: none; }
.logo span { color: var(--accent); }
.nav { display: flex; gap: 22px; align-items: center; }
.nav a { text-decoration: none; color: var(--ink); font-weight: 600; font-size: .95rem; }
.nav a:hover, .nav a.active { color: var(--accent); }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; font-size: 1rem; }

/* buttons */
.btn { display: inline-block; padding: 12px 22px; border-radius: var(--radius); font-weight: 700; text-decoration: none; border: 2px solid transparent; cursor: pointer; font-size: 1rem; font-family: inherit; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost { border-color: #fff; color: #fff; }
.btn-outline { border-color: var(--navy); color: var(--navy); background: #fff; }
.nav .btn { padding: 9px 16px; color: #fff; font-size: .9rem; }

/* hero */
.hero { background: linear-gradient(120deg, var(--navy) 0%, var(--navy-2) 100%); color: #e6edf4; }
.hero .wrap { display: grid; grid-template-columns: 1.25fr 1fr; gap: 40px; align-items: center; padding-top: 56px; padding-bottom: 56px; }
.hero h1 { color: #fff; }
.hero p.lead { font-size: 1.15rem; max-width: 34em; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.hero-note { font-size: .88rem; color: #b9c7d5; margin-top: 14px; }
.hero-imgs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.hero-imgs img { border-radius: var(--radius); aspect-ratio: 3 / 5; object-fit: cover; width: 100%; }

/* sections */
section { padding: 56px 0; }
section.soft { background: var(--bg-soft); }
.section-head { max-width: 46em; margin-bottom: 28px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: -34px; position: relative; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: 0 6px 18px rgba(15, 42, 67, .06); }
.stat b { display: block; font-size: 1.5rem; color: var(--navy); font-variant-numeric: tabular-nums; }
.stat span { font-size: .88rem; color: var(--muted); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; align-items: start; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; }
.card img { aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.card-body { padding: 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card-body p { margin: 0; color: var(--muted); font-size: .95rem; }
.card-body .more { margin-top: auto; font-weight: 700; color: var(--accent); text-decoration: none; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 4px 0; }
.chips li { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px; font-size: .8rem; color: var(--ink); }

.feature { padding: 4px 0; }
.feature h3 { margin-bottom: .3em; }
.feature p { color: var(--muted); margin: 0; }
.ticks { list-style: none; padding: 0; margin: 0; }
.ticks li { padding-left: 26px; position: relative; margin-bottom: 8px; }
.ticks li::before { content: "✓"; position: absolute; left: 0; color: var(--ok); font-weight: 800; }

.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.steps li { counter-increment: s; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.steps li::before { content: counter(s); display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--navy); color: #fff; font-weight: 700; margin-bottom: 8px; }
.steps b { display: block; }
.steps span { color: var(--muted); font-size: .93rem; }

/* product page */
.crumbs { font-size: .88rem; color: var(--muted); padding: 16px 0 0; }
.crumbs a { color: var(--muted); }
.product-top { display: grid; grid-template-columns: 340px 1fr; gap: 36px; padding: 24px 0 40px; align-items: start; }
.product-top img { border-radius: var(--radius); border: 1px solid var(--line); width: 100%; }
.caption { font-size: .8rem; color: var(--muted); margin-top: 6px; }
.keyfacts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 18px 0; }
.keyfacts div { background: var(--bg-soft); border-radius: var(--radius); padding: 12px; }
.keyfacts b { display: block; font-size: 1.15rem; color: var(--navy); }
.keyfacts span { font-size: .8rem; color: var(--muted); }

.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: .93rem; font-variant-numeric: tabular-nums; }
th, td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { background: var(--navy); color: #fff; font-weight: 600; white-space: nowrap; }
tbody tr:last-child td, tbody tr:last-child th { border-bottom: 0; }
table.spec th[scope="row"] { width: 34%; font-weight: 600; color: var(--navy); background: var(--bg-soft); }
table.matrix td, table.matrix th { text-align: right; }
table.matrix th:first-child, table.matrix td:first-child { text-align: left; }
h2.sub { margin-top: 40px; font-size: 1.3rem; }
.note { font-size: .85rem; color: var(--muted); margin-top: 8px; }
mark.tbc { background: #fff3c4; color: #6b4e00; padding: 0 5px; border-radius: 4px; font-size: .78rem; font-weight: 700; white-space: nowrap; }

/* cta band + form */
.band { background: var(--navy); color: #e6edf4; }
.band h2 { color: #fff; }
.band .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
form.inquiry { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
form.inquiry label { display: flex; flex-direction: column; gap: 5px; font-size: .88rem; font-weight: 600; }
form.inquiry .full { grid-column: 1 / -1; }
form.inquiry input, form.inquiry textarea, form.inquiry select { font: inherit; padding: 10px 12px; border: 1px solid #c4ccd6; border-radius: 6px; width: 100%; }
form.inquiry textarea { min-height: 120px; resize: vertical; }
form.inquiry .hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form-status { margin: 10px 0 0; font-size: .9rem; color: #a33; }
.form-status:empty { display: none; }
.form-note { margin: 10px 0 0; font-size: .82rem; color: var(--muted); font-weight: 400; }
.copy a { text-decoration: underline; }
.form-done { background: #e8f5ee; border: 1px solid var(--ok); border-radius: var(--radius); padding: 22px; color: var(--navy); }
.form-done p { margin: 6px 0 0; }
.contact-list { list-style: none; padding: 0; margin: 0; }
.contact-list li { padding: 12px 0; border-bottom: 1px solid var(--line); }
.contact-list b { display: block; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }

/* footer */
footer { background: #0b1f32; color: #aab8c6; font-size: .92rem; padding: 40px 0 20px; }
footer .wrap.cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 28px; }
footer h3 { color: #fff; font-size: 1rem; }
footer a { color: #d6e0ea; text-decoration: none; }
footer ul { list-style: none; padding: 0; margin: 0; }
footer li { margin-bottom: 6px; }
.copy { border-top: 1px solid #1d3550; margin-top: 28px; padding-top: 16px; font-size: .82rem; }

.wa-float { position: fixed; right: 18px; bottom: 18px; background: #1fa855; color: #fff; text-decoration: none; font-weight: 700; padding: 12px 16px; border-radius: 999px; box-shadow: 0 6px 18px rgba(0, 0, 0, .25); z-index: 30; font-size: .95rem; }

/* hero with factory photo */
.hero-photo { background: linear-gradient(110deg, rgba(11, 31, 50, .96) 0%, rgba(15, 42, 67, .9) 55%, rgba(23, 58, 92, .72) 100%), url(img/factory/factory-hall.jpg) center / cover no-repeat; }
.hero-imgs img { box-shadow: 0 10px 28px rgba(0, 0, 0, .35); }
.hero-points { list-style: none; padding: 0; margin: 22px 0 0; display: flex; flex-wrap: wrap; gap: 8px 22px; font-size: .93rem; color: #dbe5ee; }
.hero-points li { padding-left: 22px; position: relative; }
.hero-points li::before { content: "✓"; position: absolute; left: 0; color: #ffb27a; font-weight: 800; }

/* inner page header */
.page-hero { background: linear-gradient(120deg, var(--navy) 0%, var(--navy-2) 100%); color: #dbe5ee; padding: 44px 0 40px; }
.page-hero h1 { color: #fff; font-size: clamp(1.7rem, 3.6vw, 2.5rem); }
.page-hero .lead { max-width: 46em; margin: 0; font-size: 1.05rem; }
.page-hero .eyebrow { color: #ffb27a; }
.wrap.narrow { max-width: 860px; }

/* photos */
.gallery { display: grid; gap: 14px; }
.gallery.g4 { grid-template-columns: repeat(4, 1fr); }
.gallery.g2 { grid-template-columns: repeat(2, 1fr); }
figure.shot { margin: 0; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: #fff; }
figure.shot img { width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: cover; }
figure.shot figcaption { font-size: .85rem; color: var(--muted); padding: 9px 12px; }
.more-link { font-weight: 700; color: var(--accent); text-decoration: none; }
.more-link:hover { text-decoration: underline; }
.table-title { margin: 34px 0 12px; }

.proc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.proc { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; }
.proc img { width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: cover; }
.proc div { padding: 14px 16px 6px; }
.proc p { color: var(--muted); font-size: .93rem; }

/* cable anatomy */
.anatomy-wrap { align-items: center; }
svg.anatomy { width: 100%; height: auto; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 10px; }
ol.layers { counter-reset: l; list-style: none; padding: 0; margin: 0; }
ol.layers li { counter-increment: l; position: relative; padding: 0 0 14px 40px; }
ol.layers li::before { content: counter(l); position: absolute; left: 0; top: 0; width: 26px; height: 26px; border-radius: 50%; border: 1.5px solid var(--navy); color: var(--navy); font-weight: 700; font-size: .85rem; display: grid; place-items: center; background: #fff; }
ol.layers b { display: block; color: var(--navy); }
ol.layers span { color: var(--muted); font-size: .93rem; }

.feature.boxed { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; border-top: 3px solid var(--accent); }
.steps.vertical { grid-template-columns: 1fr; gap: 10px; }
.steps.vertical li { display: grid; grid-template-columns: 30px 1fr; column-gap: 14px; padding: 14px 16px; }
.steps.vertical li::before { grid-row: span 2; margin: 0; }

/* faq */
.faq details { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; margin-bottom: 10px; }
.faq summary { cursor: pointer; padding: 14px 44px 14px 16px; font-weight: 700; color: var(--navy); list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 16px; top: 50%; transform: translateY(-50%); font-size: 1.3rem; color: var(--accent); }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding: 0 16px 14px; margin: 0; color: var(--ink); }

/* bend radius calculator */
.calc { border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-soft); padding: 18px; display: grid; grid-template-columns: 220px 1fr; gap: 18px; align-items: end; }
.calc label { display: flex; flex-direction: column; gap: 6px; font-weight: 600; font-size: .9rem; }
.calc input { font: inherit; padding: 10px 12px; border: 1px solid #c4ccd6; border-radius: 6px; width: 100%; }
.calc-out { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.calc-out div { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 12px; }
.calc-out b { display: block; font-size: 1.4rem; color: var(--navy); font-variant-numeric: tabular-nums; }
.calc-out span { font-size: .8rem; color: var(--muted); }

/* product page jump links */
.jump { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.jump a { text-decoration: none; font-size: .88rem; font-weight: 600; padding: 5px 12px; border-radius: 999px; background: var(--bg-soft); color: var(--navy); }
.jump a:hover { background: var(--navy); color: #fff; }
h2[id] { scroll-margin-top: 84px; }

@media (max-width: 1080px) {
  .nav-toggle { display: block; }
  .nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: flex-start; padding: 16px 20px; border-bottom: 1px solid var(--line); }
  .nav.open { display: flex; }
}
@media (max-width: 900px) {
  .gallery.g4, .proc-grid { grid-template-columns: 1fr 1fr; }
  .calc { grid-template-columns: 1fr; }
  .hero .wrap, .grid-2, .product-top { grid-template-columns: 1fr; }
  .grid-3, .steps { grid-template-columns: 1fr 1fr; }
  .stats, .keyfacts { grid-template-columns: 1fr 1fr; }
  .product-top img { max-width: 340px; }
  footer .wrap.cols { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  .nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: flex-start; padding: 16px 20px; border-bottom: 1px solid var(--line); }
  .nav.open { display: flex; }
}
@media (max-width: 560px) {
  .grid-3, .steps, form.inquiry, .gallery.g2, .proc-grid, .calc-out { grid-template-columns: 1fr; }
  .topbar .wrap { justify-content: flex-start; gap: 12px; }
  section { padding: 40px 0; }
}

@media print {
  .topbar, .site-header, .band, footer, .wa-float, .no-print, .crumbs { display: none !important; }
  body { font-size: 11pt; }
  section { padding: 0; }
  .product-top { grid-template-columns: 180px 1fr; gap: 20px; padding: 0 0 10px; }
  thead th { background: #ddd !important; color: #000; }
  h2.sub { margin-top: 18px; break-after: avoid; }
  mark.tbc { display: none; }
  .print-head { display: block !important; border-bottom: 2px solid #000; margin-bottom: 12px; padding-bottom: 6px; font-weight: 800; font-size: 14pt; }
}
.print-head { display: none; }

/* Product structure pictures: wide banner on product pages, cropped version on cards */
img.render { display: block; width: 100%; height: auto; margin-top: 16px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.card img.render-card { height: auto; aspect-ratio: 5 / 2; object-fit: contain; background: #fff; border-bottom: 1px solid var(--line); }