/* ZTNV — local, build-free, accessible by default. */
:root {
  color-scheme: light;
  --paper: #f7f8f3;
  --surface: #ffffff;
  --ink: #1d332b;
  --muted: #56655d;
  --green: #194d3c;
  --deep: #173e32;
  --tint: #edf1e7;
  --lime: #dcebbd;
  --line: #dce2d7;
  --radius: 12px;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
::selection { color: var(--deep); background: var(--lime); }
a { color: inherit; text-underline-offset: .24em; }
a:hover { text-decoration-thickness: 2px; }
button, summary, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid #487b44; outline-offset: 5px; border-radius: 2px; }
.dark-band :focus-visible { outline-color: var(--lime); }
svg { display: block; max-width: 100%; }
button, input { font: inherit; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { font-weight: 550; }
h1, h2 { text-wrap: balance; }
p { text-wrap: pretty; }
.container { width: min(100% - 96px, 1248px); margin-inline: auto; }
.eyebrow { font-family: var(--mono); font-size: 11px; font-weight: 500; line-height: 1.6; letter-spacing: .12em; text-transform: uppercase; }
.section-heading { font-size: clamp(32px, 3.5vw, 48px); line-height: 1.16; letter-spacing: -.045em; }
.section-copy { color: var(--muted); max-width: 440px; font-size: 16px; line-height: 1.8; }
.skip-link { position: absolute; z-index: 10; top: 12px; left: 16px; padding: 12px 20px; color: var(--surface); background: var(--green); transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.site-header { position: relative; z-index: 5; }
.header-inner { min-height: 96px; display: flex; align-items: center; gap: 36px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--green); text-decoration: none; flex-shrink: 0; }
.brand-mark { width: 31px; height: 31px; }
.brand-name { font-size: 26px; font-weight: 700; letter-spacing: -.065em; line-height: 1; }
.desktop-nav { margin-inline: auto; display: flex; align-items: center; gap: 32px; }
.desktop-nav a, .header-contact { font-size: 13px; font-weight: 550; text-decoration: none; }
.desktop-nav a { padding-block: 12px; }
.desktop-nav a:hover, .footer-links a:hover { color: var(--green); text-decoration: underline; }
.header-actions { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.language-switch { display: inline-flex; gap: 3px; align-items: center; padding: 3px; border: 1px solid var(--line); border-radius: 6px; font-size: 11px; line-height: 1.25; }
.language-switch a, .language-switch span { min-width: 35px; min-height: 32px; padding: 8px; display: flex; align-items: center; justify-content: center; text-decoration: none; border-radius: 3px; }
.language-switch [aria-current] { color: white; background: var(--green); }
.language-switch a:hover { background: var(--tint); }
.header-contact { display: inline-flex; align-items: center; gap: 15px; padding: 10px 0 10px 2px; }
.link-arrow { width: 17px; height: 17px; flex: 0 0 auto; }
.mobile-menu { display: none; }
.hero { padding: 76px 0 0; }
.hero-main { display: grid; grid-template-columns: 1.15fr 1fr; gap: 42px; align-items: center; }
.hero-copy { padding-bottom: 14px; }
.hero .eyebrow { color: var(--green); display: flex; gap: 10px; align-items: center; margin-bottom: 25px; }
.eyebrow-dash { display: block; width: 22px; height: 1px; background: currentColor; flex: 0 0 auto; }
.hero h1 { max-width: 710px; font-size: clamp(42px, 5.2vw, 70px); line-height: 1.08; letter-spacing: -.055em; }
.hero h1 span { color: var(--green); }
.hero-description { max-width: 460px; margin-top: 26px; color: var(--muted); font-size: 17px; line-height: 1.8; }
.hero.company-intro { min-height: 60vh; display: flex; align-items: center; padding-block: clamp(56px, 10vh, 120px); }
.company-intro .hero-main { display: block; width: 100%; }
.company-intro .hero-copy { max-width: 900px; padding-bottom: 0; }
.hero.company-intro h1 { max-width: 900px; font-size: clamp(32px, 5.2vw, 70px); }
.company-intro .hero-description { max-width: 660px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 16px 28px; margin-top: 32px; }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 28px; padding: 12px 20px; border: 1px solid var(--green); border-radius: 5px; background: var(--green); color: #fff; font-size: 13px; font-weight: 550; line-height: 1.6; text-decoration: none; transition: background .18s ease, box-shadow .18s ease; }
.button:hover { background: var(--deep); box-shadow: 0 3px 0 rgb(23 62 50 / .12); }
.text-link { min-height: 44px; display: inline-flex; align-items: center; gap: 12px; padding-block: 8px; font-size: 13px; font-weight: 550; text-decoration: none; }
.text-link:hover { text-decoration: underline; }
.hero-art { min-width: 0; overflow: hidden; position: relative; border: 1px solid var(--line); border-radius: var(--radius); background: #edf1e7; }
.art-topline { display: flex; justify-content: space-between; gap: 16px; align-items: center; padding: 22px 24px 0; color: #5d6e61; font-family: var(--mono); font-size: 10px; line-height: 1.5; letter-spacing: .08em; text-transform: uppercase; }
.art-cross { width: 13px; height: 13px; }
.infrastructure-art { width: 100%; height: auto; }
.hero-art figcaption { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin: 0 24px; padding: 17px 0 20px; border-top: 1px solid #d3dbcb; font-size: 12px; color: #43584a; }
.art-caption-label { font-family: var(--mono); font-size: 9px; letter-spacing: .07em; }
.hero-bottom { display: flex; align-items: center; justify-content: space-between; gap: 25px; margin-top: 62px; padding: 24px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.hero-bottom > p { color: var(--muted); font-size: 12px; }
.capability-list { display: flex; align-items: center; flex-wrap: wrap; gap: 42px; list-style: none; padding: 0; margin: 0; font-size: 12px; }
.capability-list li { display: flex; align-items: center; gap: 12px; }
.capability-list span { font-family: var(--mono); font-size: 10px; color: var(--muted); }
.section { padding-block: 100px; }
.section-intro { display: grid; grid-template-columns: 1.15fr 1fr; gap: 42px; align-items: end; margin-bottom: 42px; }
.section-intro .eyebrow { margin-bottom: 16px; color: var(--green); }
.services-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 18px; }
.service-card { grid-column: span 2; display: flex; flex-direction: column; min-width: 0; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.service-card.featured { grid-column: span 3; padding: 30px; background: #eff3e9; }
.card-topline { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-bottom: 31px; }
.service-icon { width: 35px; height: 35px; color: var(--green); }
.card-index { font-family: var(--mono); font-size: 10px; letter-spacing: .08em; color: var(--muted); }
.service-card h3 { font-size: 23px; line-height: 1.3; letter-spacing: -.035em; margin-bottom: 13px; }
.service-card p { color: var(--muted); font-size: 14px; line-height: 1.8; max-width: 470px; }
.card-note { display: block; padding-top: 22px; margin-top: auto; font-size: 11px; color: var(--green); }
.card-note::before { content: ""; width: 18px; height: 1px; background: #81967c; display: inline-block; vertical-align: middle; margin-right: 8px; }
.approach { border-top: 1px solid var(--line); padding-top: 64px; padding-bottom: 88px; }
.approach-heading { display: flex; justify-content: space-between; align-items: start; gap: 32px; margin-bottom: 40px; }
.approach-heading .eyebrow { margin-top: 8px; color: var(--green); }
.approach-heading h2 { max-width: 610px; font-size: clamp(27px, 2.9vw, 38px); line-height: 1.2; letter-spacing: -.04em; }
.principles { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; padding: 0; margin: 0; list-style: none; }
.principles li { border-top: 1px solid var(--line); padding-top: 23px; }
.principle-number { display: block; color: var(--green); font-family: var(--mono); font-size: 11px; margin-bottom: 22px; }
.principles h3 { font-size: 17px; line-height: 1.4; letter-spacing: -.015em; margin-bottom: 12px; }
.principles p { color: var(--muted); font-size: 13px; line-height: 1.85; }
.dark-band { background: var(--deep); color: var(--paper); }
.about { padding-block: 79px; }
.about-inner { display: grid; grid-template-columns: 1.15fr 1fr; gap: 72px; align-items: center; }
.about .eyebrow { color: var(--lime); margin-bottom: 24px; }
.about h2 { font-size: clamp(34px, 3.65vw, 49px); line-height: 1.15; letter-spacing: -.045em; max-width: 560px; }
.about-copy { color: #dae4d9; font-size: 15px; line-height: 1.9; }
.about-copy p + p { margin-top: 17px; }
.about-signature { margin-top: 34px; display: flex; align-items: center; gap: 18px; color: var(--lime); }
.about-signature svg { width: 33px; height: 33px; }
.about-signature span { font-family: var(--mono); font-size: 10px; letter-spacing: .12em; }
.contact { padding-block: 100px; }
.contact-inner { display: grid; grid-template-columns: 1.15fr 1fr; gap: 72px; align-items: center; }
.contact .eyebrow { color: var(--green); margin-bottom: 17px; }
.contact .section-copy { margin-top: 22px; font-size: 15px; }
.contact-panel { border: 1px solid var(--line); border-radius: var(--radius); background: var(--tint); padding: 30px; }
.contact-panel .panel-topline { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 30px; }
.panel-topline .eyebrow { margin: 0; color: var(--muted); font-size: 10px; }
.contact-icon { width: 28px; height: 28px; color: var(--green); }
.contact-panel h3 { font-size: 23px; line-height: 1.35; letter-spacing: -.025em; }
.contact-panel p { color: var(--muted); margin-top: 15px; font-size: 13px; line-height: 1.85; }
.contact-panel .contact-note { margin-top: 20px; padding-top: 17px; border-top: 1px solid #d3dbcb; width: 100%; justify-content: space-between; font-size: 12px; }
.contact-email { display: inline-block; font-size: clamp(22px, 2.2vw, 30px); font-weight: 600; color: var(--green); text-decoration: none; overflow-wrap: anywhere; }
.contact-email:hover { text-decoration: underline; }
.site-footer { padding-bottom: 28px; }
.footer-main { display: flex; justify-content: space-between; gap: 30px; align-items: center; border-top: 1px solid var(--line); padding-top: 33px; padding-bottom: 32px; }
.footer-brand-block { display: flex; align-items: center; gap: 24px; }
.footer-brand-block .brand-name { font-size: 23px; }
.footer-brand-block .brand-mark { width: 27px; height: 27px; }
.footer-tagline { color: var(--muted); font-size: 11px; padding-left: 24px; border-left: 1px solid var(--line); }
.footer-links { display: flex; flex-wrap: wrap; gap: 27px; }
.footer-links a { min-height: 32px; display: inline-flex; align-items: center; gap: 8px; font-size: 12px; text-decoration: none; }
.footer-bottom { display: flex; justify-content: space-between; gap: 14px 32px; border-top: 1px solid var(--line); padding-top: 20px; color: var(--muted); font-size: 10px; }
.footer-email { display: inline-flex; align-items: center; min-height: 32px; font-size: 14px; color: var(--green); }
.legal-placeholder { text-align: right; }
html[lang="zh-Hans"] { line-break: strict; }
html[lang="zh-Hans"] h1, html[lang="zh-Hans"] h2, html[lang="zh-Hans"] h3 { letter-spacing: -.02em; font-weight: 600; }
html[lang="zh-Hans"] .hero h1 { font-size: clamp(40px, 4.5vw, 60px); line-height: 1.25; }
html[lang="zh-Hans"] .eyebrow { letter-spacing: .08em; }
html[lang="zh-Hans"] .hero-description { max-width: 450px; }
html[lang="zh-Hans"] .section-heading, html[lang="zh-Hans"] .about h2 { line-height: 1.35; }
.error-page { min-height: 100vh; display: flex; flex-direction: column; }
.error-main { flex: 1; display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: center; padding-block: 72px; }
.error-main .eyebrow { color: var(--green); margin-bottom: 20px; }
.error-main h1 { font-size: clamp(38px, 5vw, 64px); line-height: 1.1; letter-spacing: -.05em; margin-bottom: 24px; }
.error-main p { max-width: 500px; color: var(--muted); }
.error-main p + p { margin-top: 15px; }
.error-art { background: var(--tint); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
@media (min-width: 1440px) {
  .hero h1 { font-size: 70px; }
}
@media (max-width: 1100px) {
  .container { width: min(100% - 64px, 1248px); }
  .header-inner { gap: 24px; }
  .desktop-nav { gap: 22px; }
  .header-actions { gap: 18px; }
  .hero-main, .section-intro { gap: 32px; }
  .hero { padding-top: 58px; }
  .hero-description { font-size: 16px; }
  .service-card, .service-card.featured { padding: 24px; }
  .service-card h3 { font-size: 21px; }
  .about-inner, .contact-inner { gap: 44px; }
  .principles { gap: 24px; }
  .footer-tagline { max-width: 210px; }
}
@media (max-width: 860px) {
  .header-inner { min-height: 80px; justify-content: space-between; }
  .desktop-nav, .header-contact { display: none; }
  .header-actions { margin-left: auto; }
  .mobile-menu { display: block; }
  .mobile-menu summary { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 5px; list-style: none; cursor: pointer; }
  .mobile-menu summary::-webkit-details-marker { display: none; }
  .mobile-menu summary svg { width: 19px; height: 19px; }
  .menu-close { display: none; }
  .mobile-menu[open] .menu-close { display: block; }
  .mobile-menu[open] .menu-open { display: none; }
  .mobile-menu nav { position: absolute; top: calc(100% - 1px); left: 32px; right: 32px; padding: 10px 20px; background: var(--paper); border: 1px solid var(--line); border-radius: 0 0 8px 8px; box-shadow: 0 12px 18px rgb(23 62 50 / .06); }
  .mobile-menu nav a { display: flex; padding: 13px 0; text-decoration: none; font-size: 15px; }
  .mobile-menu nav a + a { border-top: 1px solid var(--line); }
  .hero-main { grid-template-columns: 1fr 1fr; gap: 24px; }
  .hero h1 { font-size: 43px; }
  .hero .eyebrow { font-size: 9px; letter-spacing: .06em; }
  .hero-description { font-size: 14px; }
  .hero-actions { gap: 10px; }
  .hero-actions .text-link { padding-inline: 3px; }
  .hero-art figcaption { margin-inline: 18px; font-size: 10px; }
  .art-topline { padding-inline: 18px; font-size: 9px; }
  .art-caption-label { display: none; }
  .hero-bottom { margin-top: 46px; align-items: flex-start; }
  .hero-bottom > p { max-width: 170px; }
  .capability-list { gap: 21px; }
  .capability-list li { gap: 7px; }
  .section { padding-block: 72px; }
  .section-intro { grid-template-columns: 1.1fr 1fr; }
  .section-copy { font-size: 14px; }
  .services-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .service-card, .service-card.featured { grid-column: span 1; }
  .service-card:last-child { grid-column: span 1; }
  .service-card:last-child p { max-width: 560px; }
  .approach { padding-top: 48px; padding-bottom: 64px; }
  .approach-heading { display: block; }
  .approach-heading .eyebrow { margin-bottom: 18px; }
  .principles { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
  .principle-number { margin-bottom: 14px; }
  .about { padding-block: 60px; }
  .about-inner { gap: 40px; grid-template-columns: 1fr 1fr; }
  .about-copy { font-size: 14px; }
  .contact-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .contact { padding-block: 72px; }
  .contact-panel { padding: 24px; }
  .contact-panel h3 { font-size: 21px; }
  .footer-brand-block { gap: 16px; }
  .footer-tagline { padding-left: 16px; max-width: 200px; }
  .footer-links { gap: 18px; }
  html[lang="zh-Hans"] .hero h1 { font-size: 38px; }
}
@media (max-width: 640px) {
  html { scroll-padding-top: 16px; }
  .container { width: calc(100% - 40px); }
  .header-inner { min-height: 76px; gap: 16px; }
  .brand-name { font-size: 25px; }
  .brand-mark { width: 28px; height: 28px; }
  .header-actions { gap: 12px; }
  .language-switch a, .language-switch span { min-width: 30px; padding-inline: 7px; }
  .mobile-menu nav { left: 20px; right: 20px; }
  .hero { padding-top: 44px; }
  .hero-main { grid-template-columns: 1fr; gap: 35px; }
  .hero-copy { padding: 0; }
  .hero .eyebrow { font-size: 9px; letter-spacing: .05em; margin-bottom: 22px; }
  .hero h1 { max-width: 540px; font-size: clamp(42px, 8.7vw, 55px); line-height: 1.09; }
  .hero-description { max-width: 500px; font-size: 15px; margin-top: 21px; }
  .hero-actions { margin-top: 25px; gap: 16px; }
  .button { padding-inline: 17px; gap: 18px; }
  .hero-art { max-width: 480px; width: 100%; justify-self: center; }
  .art-topline { padding-top: 17px; }
  .infrastructure-art { max-height: 310px; }
  .hero-art figcaption { padding-block: 14px; font-size: 11px; }
  .art-caption-label { display: inline; }
  .hero-bottom { margin-top: 30px; padding-block: 19px; display: block; }
  .hero-bottom > p { max-width: none; margin-bottom: 14px; font-size: 11px; }
  .capability-list { justify-content: space-between; gap: 10px; font-size: 11px; }
  .capability-list span { font-size: 9px; }
  .section { padding-block: 57px; }
  .section-intro { display: block; margin-bottom: 28px; }
  .section-intro .eyebrow { margin-bottom: 13px; }
  .section-heading { font-size: 34px; line-height: 1.2; }
  .section-intro .section-copy { margin-top: 21px; max-width: 490px; }
  .services-grid { grid-template-columns: 1fr; gap: 14px; }
  .service-card, .service-card.featured, .service-card:last-child { grid-column: auto; padding: 24px; }
  .card-topline { margin-bottom: 23px; }
  .service-card h3 { font-size: 23px; }
  .card-note { padding-top: 20px; }
  .approach { padding-top: 40px; padding-bottom: 52px; }
  .approach-heading { margin-bottom: 29px; }
  .approach-heading h2 { font-size: 30px; }
  .principles { gap: 28px 22px; }
  .principles li { padding-top: 18px; }
  .principles h3 { font-size: 16px; }
  .principles p { font-size: 12px; }
  .about { padding-block: 52px; }
  .about-inner { grid-template-columns: 1fr; gap: 28px; }
  .about .eyebrow { margin-bottom: 18px; }
  .about h2 { font-size: 37px; }
  .about-copy { font-size: 14px; }
  .about-signature { margin-top: 24px; }
  .contact { padding-block: 57px; }
  .contact-inner { grid-template-columns: 1fr; gap: 30px; }
  .contact .section-copy { margin-top: 19px; font-size: 14px; }
  .contact-panel { padding: 25px; }
  .contact-panel .panel-topline { margin-bottom: 24px; }
  .contact-panel h3 { max-width: 320px; font-size: 23px; }
  .footer-main { align-items: flex-start; flex-direction: column; padding-block: 28px 23px; gap: 20px; }
  .footer-brand-block { width: 100%; justify-content: space-between; }
  .footer-tagline { max-width: 175px; font-size: 10px; }
  .footer-links { gap: 27px; }
  .footer-bottom { flex-direction: column; gap: 8px; padding-top: 17px; font-size: 10px; }
  .legal-placeholder { text-align: left; }
  html[lang="zh-Hans"] .hero h1 { font-size: clamp(38px, 8vw, 49px); }
  .error-main { grid-template-columns: 1fr; gap: 42px; padding-block: 52px; }
  .error-art { max-width: 420px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media (forced-colors: active) {
  .button, .language-switch [aria-current] { border: 1px solid ButtonText; }
  .hero-art, .service-card, .contact-panel, .error-art { border-color: CanvasText; }
}
@media print {
  .site-header, .hero-art, .hero-actions, .skip-link, .footer-links { display: none; }
  body { background: white; font-size: 11pt; }
  .container { width: 100%; }
  .hero, .section, .about, .contact { padding-block: 22px; }
  .hero-main, .section-intro, .about-inner, .contact-inner { display: block; }
  .dark-band { background: white; color: black; border-block: 1px solid #777; }
  .dark-band .eyebrow, .about-copy, .about-signature { color: black; }
  .about-copy { margin-top: 20px; }
  .hero-bottom { margin-top: 22px; }
  .service-card, .principles li, .contact-panel { break-inside: avoid; }
  .contact-panel { margin-top: 20px; }
}