:root {
  --navy: #213465;
  --navy-dark: #17274e;
  --red: #ed0016;
  --red-dark: #c90012;
  --ink: #201817;
  --text: #342b2a;
  --muted: #6d6867;
  --canvas: #ffffff;
  --soft: #f6f7fa;
  --blue-soft: #f1f4fa;
  --line: #dce1ea;
  --content: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: var(--canvas); font-family: "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif; font-size: 16px; line-height: 1.75; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: -60px; left: 16px; z-index: 20; padding: 10px 16px; background: var(--red); color: #fff; }
.skip-link:focus { top: 16px; }
.site-header { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 30px; min-height: 72px; padding: 10px max(24px, calc((100vw - var(--content)) / 2)); background: rgba(255,255,255,.97); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.brand { display: flex; align-items: center; gap: 14px; flex: 0 0 auto; }
.brand img { width: 142px; height: auto; }
.brand span { padding-left: 14px; border-left: 1px solid var(--line); color: var(--muted); font-size: 12px; white-space: nowrap; }
.primary-nav { display: flex; align-items: center; justify-content: center; gap: 25px; flex: 1; }
.primary-nav a { position: relative; padding: 10px 0; color: var(--navy); font-size: 14px; font-weight: 700; }
.primary-nav a::after { position: absolute; right: 0; bottom: 3px; left: 0; height: 2px; background: var(--red); content: ""; transform: scaleX(0); transform-origin: left; transition: transform .2s ease; }
.primary-nav a:hover::after, .primary-nav a.is-active::after { transform: scaleX(1); }
.header-contact, .button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 44px; padding: 10px 20px; border: 1px solid transparent; border-radius: 999px; font-size: 14px; font-weight: 700; transition: background .2s, color .2s, border .2s, transform .2s; }
.header-contact, .button-primary { background: var(--red); color: #fff; }
.header-contact:hover, .button-primary:hover { background: var(--red-dark); transform: translateY(-1px); }
.button-outline { border-color: currentColor; color: var(--navy); }
.button-outline:hover { background: var(--navy); color: #fff; }
.button-light { border-color: rgba(255,255,255,.8); color: #fff; }
.button-light:hover { background: #fff; color: var(--navy); }
.menu-toggle { display: none; }

.hero { position: relative; overflow: hidden; color: #fff; background: var(--navy); }
.hero::after { position: absolute; right: -9vw; bottom: -19vw; width: 52vw; height: 52vw; border: 1px solid rgba(255,255,255,.18); border-radius: 50%; content: ""; }
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(360px, .92fr); gap: clamp(42px, 5vw, 72px); max-width: var(--content); min-height: 570px; margin: auto; padding: 88px 24px; align-items: center; }
.eyebrow { margin: 0 0 16px; color: #f7a2aa; font-size: 12px; font-weight: 700; letter-spacing: .14em; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 720px; margin-bottom: 24px; font-size: clamp(38px, 5vw, 64px); line-height: 1.2; letter-spacing: -.04em; }
.hero-title-line { display: block; width: 9em; text-align: justify; text-align-last: justify; }
.hero-copy { max-width: 600px; margin-bottom: 32px; color: #e7ebf5; font-size: 18px; }
.hero-actions, .button-row { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-visual { position: relative; min-height: 320px; border: 1px solid rgba(255,255,255,.24); background-color: var(--navy); background-image: linear-gradient(rgba(33,52,101,.7), rgba(33,52,101,.7)), url("assets/company-building.png"); background-position: center; background-size: cover; }
.hero-visual::before, .hero-visual::after { position: absolute; content: ""; }
.hero-visual::before { inset: 36px 0 0 36px; border: 1px solid rgba(255,255,255,.28); border-bottom: 0; border-right: 0; }
.hero-visual::after { right: 0; bottom: 0; width: 75%; height: 65%; background: rgba(237, 0, 22, .5); clip-path: polygon(36% 0, 100% 0, 100% 100%, 0 100%); }
.hero-visual span { position: absolute; z-index: 1; right: 30px; bottom: 23px; color: #fff; font-size: 13px; font-weight: 700; letter-spacing: .08em; }
.section { max-width: var(--content); margin: auto; padding: 100px 24px; }
.section-soft { max-width: none; background: var(--soft); }
.section-soft > .section { padding-top: 88px; padding-bottom: 88px; }
.section-header { display: flex; justify-content: space-between; gap: 30px; align-items: end; margin-bottom: 40px; }
.section-heading { max-width: 610px; margin-bottom: 0; color: var(--navy); font-size: clamp(30px, 4vw, 46px); line-height: 1.18; letter-spacing: -.035em; }
.product-section-heading { font-size: clamp(17px, 3.1vw, 38px); white-space: nowrap; }
.section-copy { max-width: 465px; margin: 0; color: var(--muted); }
.product-section-copy span { display: block; width: 17em; white-space: nowrap; text-align: justify; text-align-last: justify; }
.metric-strip { display: grid; grid-template-columns: repeat(4, 1fr); margin: 0; background: var(--blue-soft); }
.metric { min-height: 166px; padding: 30px clamp(18px, 4vw, 54px); border-right: 1px solid var(--line); }
.metric:last-child { border-right: 0; }
.metric b { display: block; color: var(--red); font-size: clamp(28px, 3vw, 42px); line-height: 1.2; }
.metric span { color: var(--navy); font-size: 13px; font-weight: 700; }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.product-card { display: flex; min-height: 360px; flex-direction: column; justify-content: space-between; padding: 26px; border: 1px solid var(--line); background: #fff; transition: border .2s, transform .2s; }
.product-card:hover { border-color: var(--navy); transform: translateY(-3px); }
.product-card-media { width: 100%; height: 150px; margin: -4px 0 20px; object-fit: contain; object-position: center; }
.product-type { margin: 0; color: var(--red); font-size: 12px; font-weight: 700; letter-spacing: .1em; }
.product-card h3 { margin: 12px 0 14px; color: var(--navy); font-size: 23px; line-height: 1.32; }
.product-card p { color: var(--muted); font-size: 14px; }
.card-link { color: var(--navy); font-size: 14px; font-weight: 700; }
.card-link span { color: var(--red); margin-left: 6px; }
.split-panel { display: grid; grid-template-columns: 1fr 1fr; min-height: 410px; }
.panel-dark { display: flex; flex-direction: column; justify-content: center; padding: clamp(40px, 7vw, 96px); color: #fff; background: var(--navy); }
.panel-dark h2 { font-size: clamp(32px, 4vw, 46px); line-height: 1.18; }
.panel-dark p { color: #e1e6f1; }
.panel-art { position: relative; overflow: hidden; background: var(--blue-soft); }
.panel-art::before { position: absolute; inset: 16% 12%; border: 18px solid var(--navy); border-right-color: var(--red); content: ""; transform: rotate(45deg); }
.panel-art::after { position: absolute; right: 12%; bottom: 12%; color: var(--red); content: "TL"; font-size: clamp(90px, 15vw, 210px); font-weight: 800; letter-spacing: -.13em; }
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.trust-card { padding: 28px; border-top: 3px solid var(--red); background: #fff; }
.trust-card h3 { color: var(--navy); font-size: 20px; }
.trust-card p { margin: 0; color: var(--muted); font-size: 14px; }
.service-level-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.service-level { min-height: 270px; padding: 28px 24px; background: #fff; }
.service-level > span { display: inline-block; margin-bottom: 20px; color: var(--red); font-size: 13px; font-weight: 700; letter-spacing: .1em; }
.service-level h3 { margin-bottom: 10px; color: var(--navy); font-size: 21px; }
.service-level p { min-height: 68px; margin-bottom: 18px; color: var(--muted); font-size: 13px; line-height: 1.65; }
.service-level b { display: block; color: var(--navy); font-size: 14px; }
.service-level small { display: block; margin-top: 5px; color: var(--muted); font-size: 12px; line-height: 1.55; }

.page-hero { background: var(--navy); color: #fff; }
.page-hero-inner { max-width: var(--content); margin: auto; padding: 66px 24px 72px; }
.crumbs { margin-bottom: 20px; color: #c7d0e4; font-size: 13px; }
.crumbs a:hover { color: #fff; text-decoration: underline; }
.page-hero h1 { margin: 0; font-size: clamp(36px, 4.5vw, 56px); }
.page-hero p { max-width: 650px; margin: 14px 0 0; color: #e1e6f1; }
.prose { max-width: 830px; color: var(--text); }
.prose p { margin-bottom: 22px; }
.company-name-en { margin-top: -8px; color: var(--muted); font-size: 15px; font-weight: 700; letter-spacing: .03em; }
.prose h2 { margin: 48px 0 16px; color: var(--navy); font-size: 28px; line-height: 1.35; }
.prose ul { padding-left: 1.2em; }
.prose li { margin-bottom: 10px; }
.side-layout { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 60px; }
.side-nav { align-self: start; border-top: 2px solid var(--navy); }
.side-nav a { display: block; padding: 14px 0; border-bottom: 1px solid var(--line); color: var(--navy); font-weight: 700; }
.side-nav a:hover, .side-nav a.is-active { color: var(--red); }
.notice { padding: 24px; border-left: 4px solid var(--red); background: var(--blue-soft); color: var(--navy); }
.job-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.job-card { padding: 25px; border: 1px solid var(--line); }
.job-card h3 { margin-bottom: 10px; color: var(--navy); font-size: 21px; }
.job-card p { min-height: 50px; color: var(--muted); font-size: 14px; }
.job-card a { color: var(--red); font-size: 14px; font-weight: 700; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; }
.contact-list { margin: 0; padding: 0; list-style: none; }
.contact-list li { padding: 19px 0; border-bottom: 1px solid var(--line); }
.contact-list b { display: block; color: var(--navy); font-size: 13px; }
.contact-list a { font-size: 20px; font-weight: 700; }
.contact-card { padding: 42px; background: var(--navy); color: #fff; }
.contact-card h2 { font-size: 30px; }
.contact-card p { color: #d5dced; }
.contact-card .button { background: #fff; color: var(--navy); }
.empty-state { padding: 48px; background: var(--soft); border: 1px solid var(--line); }
.empty-state h2 { color: var(--navy); }
.product-detail-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(260px, .7fr); gap: 42px; align-items: start; }
.product-detail-media { display: grid; min-height: 340px; padding: 25px; background: var(--soft); place-items: center; gap: 12px; }
.product-detail-media img { max-width: 100%; max-height: 250px; object-fit: contain; }
.product-detail-media.has-multiple { grid-template-columns: repeat(2, minmax(0, 1fr)); align-content: center; }
.product-detail-media.has-multiple img { max-height: 160px; }
.product-detail-media.has-multiple img:first-child { grid-column: 1 / -1; max-height: 190px; }
.spec-list { display: grid; gap: 9px; padding-left: 1.15em; }
.sensor-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 42px 0; }
.sensor-card { display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 18px; align-items: center; padding: 18px; border: 1px solid var(--line); }
.sensor-card img { width: 100%; height: 100px; object-fit: contain; }
.sensor-card h3 { margin: 5px 0; color: var(--navy); font-size: 18px; line-height: 1.35; }
.sensor-card p { margin-bottom: 5px; color: var(--muted); font-size: 13px; line-height: 1.6; }
.sensor-card small { color: var(--navy); font-size: 12px; font-weight: 700; }

.site-footer { color: #fff; background: var(--navy-dark); }
.footer-main { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 50px; max-width: var(--content); margin: auto; padding: 58px 24px 45px; }
.footer-codes { display: flex; align-items: flex-start; gap: 18px; }
.footer-codes img { width: 116px; height: 116px; padding: 5px; background: #fff; object-fit: contain; }
.footer-main p { max-width: 390px; color: #d5dced; font-size: 14px; }
.footer-main a { display: block; margin: 9px 0; color: #fff; font-size: 14px; }
.footer-main a:hover { color: #f7a2aa; }
.footer-title { color: #f7a2aa !important; font-size: 12px !important; font-weight: 700; letter-spacing: .1em; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 28px; max-width: var(--content); margin: auto; padding: 18px 24px; border-top: 1px solid rgba(255,255,255,.16); color: #c4cce0; font-size: 12px; text-align: center; }

@media (max-width: 900px) {
  .site-header { gap: 15px; }
  .brand span { display: none; }
  .primary-nav { gap: 16px; }
  .hero-inner { grid-template-columns: 1fr; gap: 28px; min-height: 0; }
  .hero-visual { min-height: 240px; max-width: 520px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .service-level-grid { grid-template-columns: repeat(2, 1fr); }
  .side-layout { gap: 35px; }
  .product-detail-grid { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .site-header { min-height: 64px; padding-right: 20px; padding-left: 20px; }
  .brand img { width: 126px; }
  .menu-toggle { display: grid; width: 44px; height: 44px; margin-left: auto; padding: 12px 8px; border: 0; background: transparent; gap: 6px; }
  .menu-toggle i { display: block; width: 100%; height: 2px; background: var(--navy); }
  .header-contact { display: none; }
  .primary-nav { position: absolute; top: 64px; right: 0; left: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 8px 20px 20px; background: #fff; border-bottom: 1px solid var(--line); }
  .primary-nav.is-open { display: flex; }
  .primary-nav a { padding: 11px 0; }
  .hero-inner { padding: 66px 20px; }
  .hero-copy { font-size: 16px; }
  .hero-visual { min-height: 190px; }
  .section, .section-soft > .section { padding: 64px 20px; }
  .section-header { display: block; margin-bottom: 28px; }
  .section-copy { margin-top: 15px; }
  .metric-strip, .product-grid, .trust-grid, .split-panel, .job-grid, .contact-grid, .footer-main, .sensor-grid, .service-level-grid { grid-template-columns: 1fr; }
  .metric { min-height: 112px; border-right: 0; border-bottom: 1px solid var(--line); }
  .metric:last-child { border-bottom: 0; }
  .panel-art { min-height: 260px; }
  .page-hero-inner { padding: 48px 20px 54px; }
  .side-layout { grid-template-columns: 1fr; gap: 36px; }
  .side-nav { display: none; }
  .contact-card { padding: 30px; }
  .sensor-card { grid-template-columns: 110px minmax(0, 1fr); }
  .footer-main { gap: 25px; }
  .footer-codes img { width: 108px; height: 108px; }
  .footer-bottom { padding-right: 20px; padding-left: 20px; }
}