:root {
  --ink: #111214;
  --muted: #686d76;
  --line: #dcdde0;
  --blue: #006dc9;
  --surface: #f5f6f7;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: #fff;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
img { display: block; max-width: 100%; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--blue); outline-offset: 6px; }
.skip-link { position: fixed; z-index: 100; left: 20px; top: -80px; padding: 12px 20px; color: #fff; background: var(--ink); }
.skip-link:focus { top: 12px; }
.content-width { width: calc(100% - 100px); max-width: 1320px; margin-inline: auto; }
.site-header { height: 70px; padding-inline: 54px; display: flex; align-items: center; justify-content: space-between; max-width: 1440px; margin-inline: auto; }
.brand { font-size: 25px; font-weight: 750; letter-spacing: -.055em; white-space: nowrap; }
.site-nav { display: flex; align-items: center; gap: 46px; font-size: 14px; font-weight: 500; }
.site-nav a, .site-footer a { transition: color .2s; }
.site-nav a:hover, .site-footer a:hover { color: var(--blue); }
.menu-toggle { display: none; border: 0; padding: 10px; background: transparent; }
.hero { text-align: center; overflow: hidden; }
.hero-copy { padding-top: 16px; position: relative; z-index: 1; }
.eyebrow { font-family: Arial, sans-serif; color: #686d76; margin: 0; font-size: 11px; font-weight: 500; letter-spacing: .22em; }
.hero h1 { font-size: clamp(58px, 5.8vw, 80px); line-height: 1.13; letter-spacing: -.055em; font-weight: 750; margin: 23px 0 21px; }
.hero-description { font-size: 19px; line-height: 1.7; color: var(--muted); margin: 0 20px 10px; }
.text-link { display: inline-flex; align-items: center; gap: 10px; padding: 0; border: 0; background: transparent; color: var(--blue); font-weight: 500; font-size: 17px; line-height: 1.8; }
.text-link img { width: 20px; height: 20px; }
.text-link:hover { color: #005bac; }
.hero-image { height: 392px; max-width: 1440px; margin: 7px auto 0; }
.hero-image > img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.product-summary { display: grid; grid-template-columns: 27% 44% 29%; min-height: 122px; align-items: center; border-block: 1px solid var(--line); scroll-margin-top: 20px; }
.summary-name { padding: 19px 12px; }
.summary-name p { font-size: 12px; color: var(--blue); letter-spacing: .06em; margin: 0 0 9px; }
.summary-name h2 { font-size: 27px; line-height: 1.25; letter-spacing: -.025em; margin: 0; font-weight: 650; }
.summary-description { margin: 0; padding: 4px 35px 4px 75px; border-inline: 1px solid var(--line); color: var(--muted); font-size: 16px; line-height: 1.8; }
.summary-size { display: grid; text-align: center; }
.summary-size strong { font-family: Arial, sans-serif; font-size: 38px; letter-spacing: -.025em; }
.summary-size span { color: var(--muted); font-size: 14px; margin-top: 3px; }
.applications { padding-top: 37px; padding-bottom: 76px; }
.applications > h2 { margin: 0 0 27px; text-align: center; font-size: 37px; font-weight: 650; letter-spacing: -.04em; line-height: 1.5; }
.product-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 46px; }
.product-card { min-width: 0; scroll-margin-top: 90px; }
.product-card h3 { font-size: 21px; line-height: 1.5; font-weight: 650; letter-spacing: -.045em; margin: 0 0 10px; }
.product-card > p { font-size: 14px; line-height: 1.7; margin: 0 0 14px; color: var(--muted); min-height: 24px; }
.product-image { display: block; width: 100%; border: 0; padding: 0; background: var(--surface); overflow: hidden; aspect-ratio: 1.2; text-align: left; }
.product-image > img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.product-image:hover > img { transform: scale(1.035); }
.image-note { margin: 19px 0 0; color: #70757f; font-size: 12px; line-height: 1.8; }
.material-section { background: #f7f8fa; }
.material-inner { padding-block: 100px; display: grid; grid-template-columns: 1fr 1fr; gap: 120px; }
.section-intro h2, .about h2 { font-size: clamp(38px, 4vw, 54px); font-weight: 650; letter-spacing: -.045em; line-height: 1.25; margin: 25px 0; }
.section-intro > p:last-child { color: var(--muted); max-width: 430px; font-size: 16px; line-height: 1.9; margin: 0; }
.capability-list article { display: grid; grid-template-columns: 30px 1fr; gap: 20px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.capability-list article:first-child { padding-top: 0; }
.capability-list article > span { color: var(--blue); font-size: 12px; padding-top: 5px; }
.capability-list h3 { font-size: 23px; font-weight: 550; margin: 0 0 10px; }
.capability-list p { color: var(--muted); font-size: 15px; line-height: 1.8; margin: 0; }
.about { text-align: center; padding-block: 110px; }
.about-description { font-size: 18px; color: #666c76; line-height: 2; max-width: 680px; margin: 0 auto 20px; }
.production-highlight { display: flex; align-items: center; justify-content: center; gap: 42px; max-width: 750px; margin: 36px auto 16px; padding: 30px 0; border-block: 1px solid var(--line); text-align: left; }
.production-number { display: flex; align-items: baseline; gap: 10px; white-space: nowrap; }
.production-number strong { font-size: 74px; line-height: 1; font-weight: 600; letter-spacing: -.045em; font-variant-numeric: tabular-nums; }
.production-number span { font-size: 18px; }
.production-copy h3 { margin: 0 0 10px; font-size: 20px; font-weight: 550; }
.production-copy p { color: var(--muted); font-size: 14px; line-height: 1.7; margin: 3px 0; }
.production-copy .production-period { color: var(--ink); font-size: 15px; }
.production-note { max-width: 700px; margin: 0 auto 30px; color: var(--muted); font-size: 14px; line-height: 1.8; }
.about-detail { color: var(--muted); font-size: 14px; line-height: 1.9; max-width: 660px; margin: 0 auto 28px; }
.site-footer { border-top: 1px solid var(--line); padding-block: 40px 25px; display: grid; grid-template-columns: 1fr auto; gap: 36px; }
.site-footer .brand { font-size: 21px; }
.site-footer > div p { color: var(--muted); font-size: 12px; margin: 10px 0 0; }
.site-footer nav { display: flex; gap: 30px; font-size: 13px; }
.copyright { grid-column: 1 / -1; font-family: Arial, sans-serif; margin: 0; color: #70757f; font-size: 11px; }
body.dialog-open { overflow: hidden; }
.product-dialog { border: 0; border-radius: 20px; padding: 0; width: min(900px, calc(100% - 36px)); max-height: calc(100svh - 48px); color: var(--ink); box-shadow: 0 30px 100px #0002; }
.product-dialog[open] { display: grid; grid-template-columns: 1fr 1fr; }
.product-dialog::backdrop { background: rgb(18 22 30 / 40%); backdrop-filter: blur(8px); }
.dialog-close { position: absolute; z-index: 2; right: 16px; top: 16px; display: grid; place-items: center; padding: 12px; border: 0; border-radius: 50%; background: #fff; }
.dialog-close:hover { background: #e9ebee; }
.dialog-visual { min-height: 440px; display: grid; align-items: center; background: var(--surface); }
.dialog-visual img { width: 100%; max-height: 540px; object-fit: contain; }
.dialog-copy { padding: 65px 36px 35px; }
.dialog-copy h2 { font-size: 28px; margin: 18px 0; line-height: 1.4; }
.dialog-copy > p:not(.eyebrow) { font-size: 15px; line-height: 1.85; color: var(--muted); }
.dialog-copy dl { border-top: 1px solid var(--line); margin: 25px 0; }
.dialog-copy dl > div { padding: 12px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 70px 1fr; gap: 10px; font-size: 13px; line-height: 1.8; }
.dialog-copy dt { color: var(--muted); }
.dialog-copy dd { margin: 0; }
.dialog-copy .dialog-note { font-size: 12px !important; }
@media (min-width: 1440px) { .hero-copy { padding-top: 28px; } .hero-image { height: 435px; } }
@media (max-width: 1050px) {
  .content-width { width: calc(100% - 64px); }
  .site-header { padding-inline: 32px; }
  .product-grid { gap: 24px; }
  .product-card h3 { font-size: 18px; }
  .product-card > p { min-height: 48px; }
  .summary-description { padding-inline: 28px; font-size: 14px; }
  .summary-size strong { font-size: 33px; }
  .material-inner { gap: 65px; }
}
@media (max-width: 760px) {
  .site-header { height: 64px; }
  .brand { font-size: 21px; }
  .hero-copy { padding-top: 42px; }
  .hero h1 { font-size: 56px; }
  .hero-description { font-size: 16px; }
  .hero-image { height: 300px; margin-top: 20px; }
  .summary-name h2 { font-size: 22px; }
  .summary-description { padding-inline: 20px; }
  .summary-size strong { font-size: 27px; }
  .summary-size span { font-size: 12px; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 24px; }
  .product-card h3 { font-size: 21px; }
  .product-card > p { min-height: 24px; }
  .applications > h2 { font-size: 30px; }
  .material-inner { padding-block: 75px; grid-template-columns: 1fr; gap: 42px; }
  .section-intro > p:last-child { max-width: 100%; }
  .about { padding-block: 78px; }
  .about-description { font-size: 16px; }
  .product-dialog[open] { grid-template-columns: 1fr; }
  .dialog-visual { min-height: 0; height: 260px; }
  .dialog-visual img { max-height: 260px; }
  .dialog-copy { padding: 30px; }
}
@media (max-width: 540px) {
  html { scroll-padding-top: 24px; }
  .content-width { width: calc(100% - 40px); }
  .site-header { padding-inline: 20px; position: relative; z-index: 10; }
  .menu-toggle { display: block; margin-right: -10px; }
  .site-nav { display: none; position: absolute; top: 64px; inset-inline: 0; padding: 14px 24px 24px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 12px 18px #00000005; font-size: 18px; gap: 0; }
  .site-nav.is-open { display: grid; }
  .site-nav a { padding: 15px 0; }
  .hero-copy { padding-top: 30px; }
  .eyebrow { font-size: 9px; letter-spacing: .19em; }
  .hero h1 { font-size: clamp(39px, 11.3vw, 57px); line-height: 1.17; margin-top: 22px; }
  .hero-description { max-width: 300px; margin: 0 auto 13px; font-size: 14px; }
  .text-link { font-size: 15px; }
  .hero-image { width: 100%; height: 238px; margin-top: 14px; }
  .hero-image img { width: 160%; max-width: none; margin-left: -30%; }
  .product-summary { grid-template-columns: 1fr 1fr; padding-block: 22px; gap: 18px 0; min-height: 0; }
  .summary-name { padding: 0; }
  .summary-name p { font-size: 10px; margin-bottom: 7px; }
  .summary-size { border-left: 1px solid var(--line); }
  .summary-size strong { font-size: 29px; }
  .summary-description { grid-column: 1 / -1; grid-row: 2; padding: 0; border: 0; font-size: 13px; }
  .summary-description br { display: none; }
  .applications { padding-top: 39px; padding-bottom: 48px; }
  .applications > h2 { font-size: clamp(24px, 6.3vw, 30px); margin-bottom: 25px; }
  .product-grid { gap: 26px 16px; }
  .product-card h3 { font-size: clamp(15px, 3.8vw, 20px); margin-bottom: 7px; letter-spacing: -.055em; }
  .product-card > p { font-size: 12px; line-height: 1.65; min-height: 40px; margin-bottom: 11px; }
  .product-image { aspect-ratio: 1; }
  .image-note { font-size: 10px; margin-top: 20px; }
  .material-inner { padding-block: 57px; }
  .section-intro h2, .about h2 { font-size: 34px; }
  .capability-list h3 { font-size: 20px; }
  .capability-list p { font-size: 14px; }
  .about { padding-block: 65px; }
  .about-description { font-size: 15px; }
  .production-highlight { flex-direction: column; gap: 20px; text-align: center; margin-top: 25px; padding-block: 26px; }
  .production-number strong { font-size: 64px; }
  .production-copy h3 { font-size: 18px; }
  .production-note { font-size: 13px; }
  .about-detail { font-size: 13px; }
  .site-footer { grid-template-columns: 1fr; gap: 28px; }
  .site-footer nav { gap: 26px; }
  .copyright { font-size: 10px; line-height: 1.8; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; } }