:root {
  --ink: #10233f;
  --ink-2: #1e3859;
  --muted: #607086;
  --line: #dce3eb;
  --soft: #f3f6f9;
  --white: #fff;
  --orange: #f58220;
  --orange-dark: #d96509;
  --shadow: 0 24px 60px rgba(16, 35, 63, .12);
  --radius: 18px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif; line-height: 1.65; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.16; letter-spacing: -.025em; }
h1 { font-size: clamp(2.7rem, 5vw, 5.5rem); }
h2 { font-size: clamp(2rem, 3.5vw, 3.25rem); }
h3 { font-size: 1.25rem; }
p { color: var(--muted); }

.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.container.narrow { max-width: 850px; }
.section { padding: 100px 0; }
.section-soft { background: var(--soft); }
.section-dark { color: var(--white); background: var(--ink); }
.section-dark p, .section-dark .eyebrow { color: #b9c6d7; }
.screen-reader-text { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 9999; top: 8px; left: 8px; padding: 10px 14px; color: var(--white); background: var(--ink); transform: translateY(-140%); }
.skip-link:focus { transform: translateY(0); }
.eyebrow { display: inline-block; margin-bottom: 16px; color: var(--orange-dark); font-size: .78rem; font-weight: 800; letter-spacing: .17em; text-transform: uppercase; }

.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 24px; border: 1px solid transparent; border-radius: 8px; font-weight: 750; line-height: 1; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--white); background: var(--orange); }
.button-primary:hover { background: var(--orange-dark); }
.button-secondary { color: var(--ink); border-color: #b7c3d0; background: transparent; }
.button-secondary:hover { border-color: var(--ink); }
.button-small { min-height: 42px; padding-inline: 17px; color: var(--white); background: var(--orange); }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.text-link { color: var(--orange-dark); font-weight: 750; }

.site-header { position: sticky; z-index: 1000; top: 0; border-bottom: 1px solid rgba(16, 35, 63, .08); background: rgba(255, 255, 255, .94); backdrop-filter: blur(16px); }
.header-inner { display: flex; min-height: 78px; align-items: center; justify-content: space-between; gap: 24px; }
.brand img { width: 194px; height: 48px; }
.primary-nav { display: flex; align-items: center; gap: 27px; font-size: .94rem; font-weight: 700; }
.primary-nav > a:not(.button) { position: relative; padding-block: 28px; }
.primary-nav > a:not(.button)::after { position: absolute; right: 0; bottom: 20px; left: 0; height: 2px; background: var(--orange); content: ""; transform: scaleX(0); transform-origin: right; transition: transform .2s ease; }
.primary-nav > a:hover::after { transform: scaleX(1); transform-origin: left; }
.language-link { color: var(--orange-dark); }
.nav-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 0; background: transparent; }
.nav-toggle span:not(.screen-reader-text) { display: block; height: 2px; margin: 5px 0; background: var(--ink); }

.hero { position: relative; min-height: 760px; overflow: hidden; padding: 82px 0; background: radial-gradient(circle at 78% 30%, #eef3f8 0, #fff 50%); }
.hero::before { position: absolute; top: -160px; left: -180px; width: 500px; height: 500px; border: 1px solid rgba(245, 130, 32, .2); border-radius: 50%; content: ""; }
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 70px; }
.hero-copy { position: relative; z-index: 2; }
.hero-copy h1 { max-width: 720px; margin-bottom: 24px; }
.hero-copy p { max-width: 630px; font-size: 1.18rem; }
.hero-visual { position: relative; min-height: 590px; }
.hero-tile { position: absolute; overflow: hidden; border: 10px solid var(--white); border-radius: 20px; background-color: var(--soft); background-position: center; background-size: cover; box-shadow: var(--shadow); }
.hero-tile-1 { z-index: 3; top: 4%; right: 2%; width: 52%; height: 55%; transform: rotate(2deg); }
.hero-tile-2 { z-index: 2; bottom: 2%; left: 0; width: 52%; height: 57%; transform: rotate(-3deg); }
.hero-tile-3 { z-index: 1; top: 20%; left: 7%; width: 38%; height: 42%; filter: saturate(.9); }
.hero-tile-4 { z-index: 4; right: 4%; bottom: 5%; width: 34%; height: 38%; }
.signal-line { position: absolute; z-index: 5; width: 130px; height: 2px; background: var(--orange); }
.signal-line::after { position: absolute; top: -4px; right: -1px; width: 10px; height: 10px; border-radius: 50%; background: var(--orange); content: ""; }
.signal-line-a { top: 46%; right: 21%; transform: rotate(20deg); }
.signal-line-b { bottom: 30%; left: 27%; transform: rotate(-30deg); }
.hero-metrics { display: flex; gap: 36px; margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--line); }
.hero-metrics div { display: flex; flex-direction: column; }
.hero-metrics strong { font-size: 2rem; line-height: 1; }
.hero-metrics span { margin-top: 8px; color: var(--muted); font-size: .82rem; }

.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 46px; }
.section-heading h2 { margin-bottom: 0; }
.section-heading.light h2 { color: var(--white); }
.category-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.category-grid-large { grid-template-columns: repeat(3, 1fr); }
.category-card { position: relative; overflow: hidden; min-height: 430px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); transition: transform .25s ease, box-shadow .25s ease; }
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.category-card-image { height: 300px; background-position: center 34%; background-size: cover; transition: transform .35s ease; }
.category-card:hover .category-card-image { transform: scale(1.035); }
.category-card-body { position: relative; padding: 23px; }
.category-card-body > span:first-child { color: var(--muted); font-size: .78rem; font-weight: 700; text-transform: uppercase; }
.category-card-body h2, .category-card-body h3 { max-width: 82%; margin: 6px 0 0; }
.category-card-body h2 { font-size: 1.55rem; }
.card-arrow { position: absolute; top: 28px; right: 22px; color: var(--orange); font-size: 1.5rem; }

.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.product-card { display: flex; min-height: 305px; flex-direction: column; padding: 28px; overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: var(--white); transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease; }
.product-card:hover { border-color: rgba(245, 130, 32, .65); transform: translateY(-4px); box-shadow: 0 20px 45px rgba(9, 25, 46, .1); }
.product-grid-dark .product-card { border-color: rgba(255, 255, 255, .13); background: rgba(255, 255, 255, .055); }
.product-grid-dark .product-card h3 { color: var(--white); }
.product-card-image { margin: -28px -28px 24px; border-bottom: 1px solid var(--line); background: #f6f8fb; }
.product-card-image img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform .3s ease; }
.product-card:hover .product-card-image img { transform: scale(1.025); }
.product-grid-dark .product-card-image { border-bottom-color: rgba(255, 255, 255, .12); }
.product-category { color: var(--orange-dark); font-size: .74rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.product-model { display: block; margin: 22px 0 12px; color: var(--ink); font-size: 1.8rem; line-height: 1; }
.product-grid-dark .product-model { color: var(--white); }
.product-card h2, .product-card h3 { margin-bottom: 28px; font-size: 1.05rem; line-height: 1.4; }
.product-card .text-link { margin-top: auto; }
.feature-chips { display: flex; flex-wrap: wrap; gap: 7px; margin: 0 0 25px; }
.feature-chips span { padding: 6px 9px; border-radius: 5px; color: var(--ink-2); background: var(--soft); font-size: .72rem; font-weight: 700; }

.value-grid { display: grid; grid-template-columns: .8fr 1.2fr; align-items: center; gap: 90px; }
.value-grid > div:first-child p { max-width: 570px; font-size: 1.05rem; }
.value-cards { display: grid; gap: 14px; }
.value-cards article { position: relative; min-height: 145px; padding: 30px 30px 25px 90px; border: 1px solid var(--line); border-radius: 12px; background: var(--white); }
.value-cards article > span { position: absolute; top: 30px; left: 28px; color: var(--orange); font-size: .85rem; font-weight: 800; }
.value-cards h2, .value-cards h3 { margin-bottom: 8px; font-size: 1.25rem; }
.value-cards p { margin-bottom: 0; }
.value-cards-wide { grid-template-columns: repeat(3, 1fr); }
.value-cards-wide article { padding: 80px 28px 28px; }

.page-hero { padding: 110px 0 90px; color: var(--white); background: linear-gradient(125deg, var(--ink) 0%, #183f68 78%, #24557f 100%); }
.page-hero h1 { margin-bottom: 22px; color: var(--white); }
.page-hero p { max-width: 780px; margin-bottom: 0; color: #c7d3e1; font-size: 1.16rem; }
.page-hero-compact { padding-block: 70px; }
.category-hero { padding: 58px 0; }
.category-hero-grid { display: grid; grid-template-columns: 1fr 360px; align-items: center; gap: 70px; }
.category-hero-grid img { width: 360px; height: 250px; border-radius: 14px; object-fit: cover; object-position: center 38%; box-shadow: 0 20px 50px rgba(0, 0, 0, .28); }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 34px; color: #9fb1c7; font-size: .78rem; }
.breadcrumbs a:hover { color: var(--white); }
.filter-bar { display: flex; align-items: center; justify-content: space-between; gap: 30px; margin-bottom: 30px; }
.product-search { width: min(100%, 390px); min-height: 48px; padding: 0 16px; border: 1px solid var(--line); border-radius: 8px; color: var(--ink); background: var(--white); }
.product-search:focus { border-color: var(--orange); outline: 3px solid rgba(245, 130, 32, .13); }
.empty-message { padding: 35px; text-align: center; }

.product-hero { padding: 55px 0 90px; background: linear-gradient(180deg, #eef3f8 0, #fff 100%); }
.product-hero .breadcrumbs { color: var(--muted); }
.product-hero .breadcrumbs a:hover { color: var(--ink); }
.product-hero-grid { display: grid; grid-template-columns: .95fr 1.05fr; align-items: center; gap: 80px; }
.product-visual { position: relative; padding: 18px; border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow); }
.product-visual img { width: 100%; aspect-ratio: 4 / 3; border-radius: 11px; object-fit: cover; object-position: center; }
.product-visual > span { position: absolute; right: 27px; bottom: 27px; padding: 7px 10px; border-radius: 4px; color: var(--white); background: rgba(16, 35, 63, .78); font-size: .7rem; }
.product-model-large { margin: 0 0 18px; color: var(--orange-dark); font-size: 1rem; letter-spacing: .14em; }
.product-intro h1 { margin-bottom: 22px; font-size: clamp(2.4rem, 4vw, 4rem); }
.product-intro p { font-size: 1.05rem; }
.feature-chips-large { margin-top: 30px; }
.feature-chips-large span { padding: 9px 12px; background: #e7edf4; }
.detail-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 80px; }
.detail-grid > div p { max-width: 720px; font-size: 1.05rem; }
.spec-card { padding: 30px; border: 1px solid var(--line); border-radius: 14px; background: var(--soft); }
.spec-card h2 { font-size: 1.3rem; }
.spec-card dl { margin: 0; }
.spec-card dl > div { display: grid; grid-template-columns: 130px 1fr; gap: 18px; padding: 15px 0; border-top: 1px solid var(--line); }
.spec-card dt { color: var(--muted); }
.spec-card dd { margin: 0; font-weight: 700; }
.technical-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 90px; }
.technical-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 35px; margin: 0; padding: 0; list-style: none; }
.technical-list li { position: relative; padding: 14px 0 14px 25px; border-top: 1px solid var(--line); color: var(--ink-2); }
.technical-list li::before { position: absolute; top: 24px; left: 3px; width: 7px; height: 7px; border-radius: 50%; background: var(--orange); content: ""; }
.inquiry-section { color: var(--white); background: var(--ink); }
.inquiry-section h2 { color: var(--white); }
.inquiry-section p { color: #b9c6d7; }
.inquiry-grid { display: grid; grid-template-columns: .8fr 1.2fr; align-items: start; gap: 80px; }
.form-card { padding: 35px; border-radius: 16px; color: var(--ink); background: var(--white); box-shadow: var(--shadow); }
.inquiry-form label { display: grid; gap: 7px; margin-bottom: 17px; color: var(--ink-2); font-size: .82rem; font-weight: 700; }
.inquiry-form input, .inquiry-form textarea { width: 100%; padding: 12px 13px; border: 1px solid #cbd5e0; border-radius: 7px; color: var(--ink); background: var(--white); }
.inquiry-form input:focus, .inquiry-form textarea:focus { border-color: var(--orange); outline: 3px solid rgba(245, 130, 32, .12); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-honeypot { position: absolute; left: -9999px; }
.form-notice { margin-bottom: 18px; padding: 12px 14px; border-radius: 7px; background: #edf6ee; color: #245d2a; }
.form-notice-error, .form-notice-missing, .form-notice-invalid { color: #8b2222; background: #fff0f0; }

.solution-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.solution-card { display: grid; min-height: 300px; padding: 34px; border: 1px solid var(--line); border-radius: 14px; background: var(--white); }
.solution-number { color: var(--orange); font-weight: 800; }
.solution-card h2 { margin: 26px 0 14px; font-size: 1.8rem; }
.solution-card strong { color: var(--ink-2); font-size: .84rem; }
.solution-card .text-link { align-self: end; margin-top: 30px; }
.cta-band { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta-band h2 { margin-bottom: 0; }
.about-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 100px; }
.about-grid p { font-size: 1.08rem; }
.contact-layout { grid-template-columns: .85fr 1.15fr; }
.contact-panel { margin: 34px 0; padding: 0; list-style: none; }
.contact-panel li { display: grid; gap: 4px; padding: 17px 0; border-top: 1px solid var(--line); }
.contact-panel span { color: var(--muted); font-size: .76rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.contact-panel a { color: var(--ink); font-size: 1.14rem; font-weight: 750; }
.small-note { font-size: .9rem; }
.requirement-list > div { display: grid; grid-template-columns: 55px 1fr 55px 1fr; align-items: start; gap: 18px; margin-top: 35px; }
.requirement-list span { color: var(--orange); font-weight: 800; }
.prose { max-width: 850px; }
.prose p { font-size: 1.05rem; }
.error-page { min-height: 600px; }

.site-footer { padding: 75px 0 25px; color: #d4deea; background: #09182b; }
.footer-grid { display: grid; grid-template-columns: 1.3fr .7fr 1fr; gap: 80px; }
.footer-logo { width: 194px; margin-bottom: 25px; }
.footer-grid p { max-width: 420px; color: #93a5ba; }
.footer-grid h2 { color: var(--white); font-size: .95rem; letter-spacing: .08em; text-transform: uppercase; }
.footer-grid ul { padding: 0; list-style: none; }
.footer-grid li { margin: 10px 0; color: #93a5ba; font-size: .9rem; }
.footer-grid a:hover { color: var(--white); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 25px; margin-top: 55px; padding-top: 22px; border-top: 1px solid rgba(255, 255, 255, .11); color: #71859e; font-size: .8rem; }

@media (max-width: 1050px) {
  .primary-nav { gap: 17px; }
  .primary-nav .button-small { display: none; }
  .hero-grid { gap: 35px; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .value-grid, .product-hero-grid, .detail-grid, .inquiry-grid { gap: 45px; }
}

@media (max-width: 820px) {
  .section { padding: 72px 0; }
  .nav-toggle { display: block; }
  .primary-nav { position: absolute; top: 78px; right: 0; left: 0; display: none; align-items: stretch; flex-direction: column; gap: 0; padding: 14px 20px 24px; border-bottom: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow); }
  .primary-nav.is-open { display: flex; }
  .primary-nav > a:not(.button) { padding: 13px 5px; }
  .primary-nav > a:not(.button)::after { display: none; }
  .primary-nav .button-small { display: inline-flex; margin-top: 10px; }
  .hero { min-height: auto; padding: 65px 0 75px; }
  .hero-grid, .value-grid, .product-hero-grid, .detail-grid, .technical-grid, .inquiry-grid, .about-grid { grid-template-columns: 1fr; }
  .hero-visual { min-height: 520px; }
  .value-grid { gap: 50px; }
  .category-hero-grid { grid-template-columns: 1fr 260px; gap: 30px; }
  .category-hero-grid img { width: 260px; }
  .solution-grid { grid-template-columns: 1fr; }
  .value-cards-wide { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > div:first-child { grid-column: 1 / -1; }
}

@media (max-width: 580px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  h1 { font-size: 2.55rem; }
  h2 { font-size: 2rem; }
  .header-inner { min-height: 70px; }
  .brand img { width: 165px; }
  .primary-nav { top: 70px; }
  .hero-visual { min-height: 410px; }
  .hero-tile { border-width: 6px; }
  .hero-tile-1 { width: 60%; }
  .hero-tile-2 { width: 58%; }
  .hero-tile-3 { left: 2%; width: 45%; }
  .hero-metrics { gap: 20px; }
  .hero-metrics strong { font-size: 1.55rem; }
  .hero-metrics span { font-size: .68rem; }
  .button-row .button { width: 100%; }
  .section-heading, .filter-bar, .cta-band { align-items: flex-start; flex-direction: column; }
  .category-grid, .category-grid-large, .product-grid { grid-template-columns: 1fr; }
  .category-card { min-height: 390px; }
  .category-card-image { height: 275px; }
  .product-card { min-height: 275px; }
  .category-hero-grid { grid-template-columns: 1fr; }
  .category-hero-grid img { width: 100%; height: 230px; }
  .form-grid { grid-template-columns: 1fr; gap: 0; }
  .form-card { padding: 24px; }
  .spec-card dl > div { grid-template-columns: 1fr; gap: 4px; }
  .technical-list { grid-template-columns: 1fr; }
  .requirement-list > div { grid-template-columns: 40px 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 35px; }
  .footer-grid > div:first-child { grid-column: auto; }
  .footer-bottom { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}