:root {
  --navy-950: #061f31;
  --navy-900: #082f49;
  --navy-800: #0b4262;
  --blue-700: #0967a3;
  --teal-600: #07847f;
  --teal-500: #0aa39a;
  --teal-100: #dff5f2;
  --ink: #132f3e;
  --muted: #617987;
  --line: #d8e4e9;
  --surface: #f3f7f8;
  --white: #fff;
  --orange: #ee7a19;
  --shadow: 0 18px 55px rgba(5, 39, 59, .12);
  --shadow-small: 0 10px 30px rgba(5, 39, 59, .08);
  --container: min(1240px, calc(100% - 40px));
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 92px; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body.nav-open, body.lightbox-open { overflow: hidden; }

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }

.container { width: var(--container); margin: 0 auto; }

.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--navy-950);
  color: var(--white);
  transition: top .2s ease;
}

.skip-link:focus { top: 12px; }

.section { padding: 100px 0; }
.section, .hero { scroll-margin-top: 92px; }

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal-600);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .22em;
}

.eyebrow-light { color: #7ee2d6; }

.section-head {
  display: grid;
  grid-template-columns: 1fr minmax(320px, 470px);
  align-items: end;
  gap: 60px;
  margin-bottom: 48px;
}

.section-head h2, .profile-copy h2, .contact-copy h2, .advantages-intro h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.15;
  letter-spacing: -.03em;
}

.section-head > p, .section-head-light > p { margin: 0; color: var(--muted); }
.section-head-light h2 { color: var(--white); }
.section-head-light > p { color: #b9cfda; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid rgba(8, 47, 73, .08);
  background: rgba(255, 255, 255, .97);
  transition: box-shadow .25s ease, background-color .25s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, .94);
  box-shadow: 0 10px 35px rgba(5, 39, 59, .1);
  backdrop-filter: blur(14px);
}

.header-bar {
  display: grid;
  grid-template-columns: minmax(300px, auto) 1fr auto;
  align-items: center;
  gap: 28px;
  min-height: 88px;
}

.brand { display: flex; align-items: center; gap: 14px; min-width: 0; }
.brand img { width: 62px; height: 62px; flex: 0 0 auto; object-fit: contain; }
.brand-copy { display: flex; min-width: 0; flex-direction: column; }
.brand-copy strong { color: #075fa0; font-size: 18px; line-height: 1.25; white-space: nowrap; }
.brand-copy small { margin-top: 5px; color: #79909b; font-size: 9px; letter-spacing: .08em; white-space: nowrap; }

.site-nav { display: flex; justify-content: center; gap: clamp(14px, 1.6vw, 28px); }
.site-nav a { position: relative; color: #3b5967; font-size: 14px; font-weight: 700; white-space: nowrap; }
.site-nav a::after { position: absolute; right: 50%; bottom: -12px; left: 50%; height: 2px; background: var(--teal-500); content: ""; transition: right .2s ease, left .2s ease; }
.site-nav a:hover, .site-nav a.is-current { color: var(--blue-700); }
.site-nav a:hover::after, .site-nav a.is-current::after { right: 0; left: 0; }

.header-phone {
  display: flex;
  min-width: 188px;
  padding: 10px 17px;
  border-radius: 4px;
  background: var(--navy-900);
  color: var(--white);
  flex-direction: column;
  line-height: 1.15;
}

.header-phone span { color: #9edbd7; font-size: 10px; letter-spacing: .12em; }
.header-phone strong { margin-top: 4px; font-size: 20px; letter-spacing: .03em; }

.nav-toggle {
  display: none;
  width: 46px;
  height: 42px;
  padding: 9px 11px;
  border: 1px solid var(--line);
  background: var(--white);
  cursor: pointer;
}

.nav-toggle span { display: block; width: 100%; height: 2px; margin: 4px 0; background: var(--navy-900); }
.nav-toggle b { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* Hero */
.hero {
  display: flex;
  padding: 22px 0;
  justify-content: center;
  background: #061f31;
}

.hero-poster-media {
  display: block;
  width: min(100%, 1800px);
}

.hero-poster-media img {
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: center;
}

.btn {
  display: inline-flex;
  min-height: 50px;
  padding: 0 25px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 3px;
  font-weight: 800;
  transition: transform .2s ease, background-color .2s ease, border-color .2s ease;
}

.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--teal-500); color: var(--white); }
.btn-primary:hover { background: #08b7ac; }
.btn-outline { border-color: rgba(255, 255, 255, .58); color: var(--white); }
.btn-outline:hover { border-color: var(--white); background: rgba(255, 255, 255, .1); }
.btn-teal { background: var(--teal-500); color: var(--white); }

/* Business */
.business-section { background: var(--surface); }
.business-list { border-top: 1px solid #c8d8df; }

.business-pillar {
  display: grid;
  min-height: 245px;
  grid-template-columns: minmax(280px, 39%) 1fr;
  border-right: 1px solid #c8d8df;
  border-bottom: 1px solid #c8d8df;
  border-left: 1px solid #c8d8df;
  background: var(--white);
  overflow: hidden;
}

.business-pillar img { width: 100%; height: 100%; min-height: 245px; object-fit: cover; transition: transform .55s ease; }
.business-pillar:hover img { transform: scale(1.035); }
.business-pillar:nth-child(even) { grid-template-columns: 1fr minmax(280px, 39%); }
.business-pillar:nth-child(even) img { order: 2; }
.business-pillar-copy { position: relative; display: flex; padding: 46px 54px; justify-content: center; flex-direction: column; }
.business-pillar-copy > span { position: absolute; top: 24px; right: 30px; color: #d9e7eb; font-size: 58px; font-weight: 900; line-height: 1; }
.business-pillar-copy h3 { position: relative; margin: 0 0 15px; padding-left: 18px; color: var(--navy-900); font-size: clamp(21px, 2vw, 28px); line-height: 1.3; }
.business-pillar-copy h3::before { position: absolute; top: .2em; bottom: .2em; left: 0; width: 4px; background: var(--orange); content: ""; }
.business-pillar-copy p { position: relative; max-width: 650px; margin: 0; color: var(--muted); }

.industry-solutions { margin-top: 88px; }
.industry-solutions-head { display: grid; grid-template-columns: 1fr minmax(320px, 470px); align-items: end; gap: 60px; margin-bottom: 30px; }
.industry-solutions-head h2 { margin: 0; color: var(--navy-900); font-size: clamp(28px, 3.4vw, 42px); line-height: 1.18; }
.industry-solutions-head > p { margin: 0; color: var(--muted); }
.industry-solutions-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.industry-solution-card { position: relative; min-width: 0; background: var(--navy-900); color: var(--white); box-shadow: var(--shadow-small); overflow: hidden; }
.industry-card-media { position: relative; display: block; height: 210px; overflow: hidden; background: #e9f0f3; }
.industry-card-media::after { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 42%, rgba(3, 24, 38, .52)); content: ""; }
.industry-card-media img { position: relative; width: 100%; height: 100%; max-width: none; object-fit: cover; transition: transform .5s ease; }
.industry-solution-card:hover .industry-card-media img { transform: scale(1.04); }
.industry-card-copy { display: flex; min-height: 195px; padding: 22px; flex-direction: column; }
.industry-card-copy b { color: #7ee2d6; font-size: 10px; letter-spacing: .08em; }
.industry-card-copy strong { margin-top: 14px; font-size: 18px; line-height: 1.5; }
.industry-card-copy em { margin-top: auto; padding-top: 22px; color: #bad0da; font-size: 12px; font-style: normal; }

/* Equipment */
.equipment-section { background: var(--navy-950); }

.equipment-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 30px;
  padding-bottom: 14px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.equipment-tab { flex: 0 0 auto; padding: 11px 18px; border: 1px solid rgba(255, 255, 255, .2); background: transparent; color: #c4d6de; cursor: pointer; }
.equipment-tab:hover, .equipment-tab.is-active { border-color: var(--teal-500); background: var(--teal-500); color: var(--white); }

.equipment-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }

.equipment-card {
  background: var(--white);
  box-shadow: 0 14px 34px rgba(0, 0, 0, .16);
  overflow: hidden;
  transition: transform .25s ease, box-shadow .25s ease;
}

.equipment-card:hover { transform: translateY(-6px); box-shadow: 0 20px 45px rgba(0, 0, 0, .24); }
.equipment-card[hidden] { display: none; }
.equipment-trigger { display: block; width: 100%; padding: 0; border: 0; background: #dbe7eb; cursor: zoom-in; overflow: hidden; }
.equipment-trigger img { width: 100%; height: auto; aspect-ratio: 1.35; object-fit: contain; background: #fff; transition: transform .45s ease; }
.equipment-trigger:hover img { transform: scale(1.045); }
.equipment-card > div { min-height: 185px; padding: 22px 23px 25px; }
.equipment-card span { color: var(--teal-600); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.equipment-card h3 { margin: 8px 0 9px; color: var(--navy-900); font-size: 19px; line-height: 1.35; }
.equipment-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }

/* Advantages */
.advantages-section { background: linear-gradient(135deg, #0a3b58, #075e70); color: var(--white); }
.advantages-layout { display: grid; grid-template-columns: .9fr 1.1fr; align-items: start; gap: 80px; }
.advantages-intro { position: sticky; top: 130px; }
.advantages-intro > p:last-of-type { max-width: 510px; margin: 24px 0 0; color: #c8dce3; }
.process-line { display: flex; margin-top: 42px; align-items: center; flex-wrap: wrap; gap: 9px; color: #d6e6ea; font-size: 12px; }
.process-line i { width: 24px; height: 1px; background: #68cfc6; }
.advantage-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }

.advantage-card {
  min-height: 240px;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, .15);
  background: rgba(255, 255, 255, .075);
}

.advantage-card b { color: #76d9cf; font-size: 13px; }
.advantage-card h3 { margin: 36px 0 10px; font-size: 20px; }
.advantage-card p { margin: 0; color: #bed4dc; font-size: 14px; }

/* Profile */
.profile-section { background: var(--white); }
.profile-layout { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 78px; }
.profile-gallery { position: relative; min-height: 580px; }
.profile-main { width: 83%; height: 500px; object-fit: cover; }
.profile-small { position: absolute; right: 0; bottom: 0; width: 47%; height: 260px; border: 10px solid var(--white); object-fit: cover; }
.profile-gallery > span { position: absolute; bottom: 35px; left: 30px; padding: 18px 24px; background: var(--orange); color: var(--white); font-size: 12px; font-weight: 800; letter-spacing: .12em; line-height: 1.45; }
.profile-copy h2 { color: var(--navy-900); }
.profile-lead { margin: 25px 0 12px; color: var(--navy-800); font-size: 19px; font-weight: 700; }
.profile-copy > p:not(.eyebrow):not(.profile-lead) { color: var(--muted); }
.profile-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 30px 0 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.profile-facts div { padding: 18px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.profile-facts dt { color: var(--muted); font-size: 12px; }
.profile-facts dd { margin: 4px 0 0; color: var(--navy-900); font-size: 14px; font-weight: 800; }

.credentials-gallery { margin-top: 78px; padding-top: 52px; border-top: 1px solid var(--line); }
.credentials-head { display: grid; grid-template-columns: 1fr minmax(320px, 470px); align-items: end; gap: 60px; margin-bottom: 28px; }
.credentials-head h3 { margin: 0; color: var(--navy-900); font-size: clamp(26px, 3vw, 38px); }
.credentials-head > p { margin: 0; color: var(--muted); }
.credentials-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.credential-card { display: block; padding: 0; border: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow-small); text-align: left; cursor: zoom-in; overflow: hidden; }
.credential-card img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; background: #f2f5f7; transition: transform .35s ease; }
.credential-card:hover img { transform: scale(1.015); }
.credential-card span { display: block; padding: 15px 18px; color: var(--navy-900); font-weight: 800; }
.credentials-note { margin: 15px 0 0; color: var(--muted); font-size: 12px; }

/* Contact */
.contact-section { background: var(--navy-950); color: var(--white); }
.contact-layout { display: grid; grid-template-columns: 1fr 360px; align-items: center; gap: 100px; }
.contact-copy > p:not(.eyebrow) { max-width: 660px; margin: 20px 0 0; color: #bed1da; }
.contact-list { display: grid; gap: 0; max-width: 720px; margin: 34px 0 28px; padding: 0; list-style: none; border-top: 1px solid rgba(255, 255, 255, .17); }
.contact-list li { display: grid; grid-template-columns: 110px 1fr; gap: 20px; padding: 17px 0; border-bottom: 1px solid rgba(255, 255, 255, .17); }
.contact-list span { color: #8eabb8; font-size: 13px; }
.contact-list strong { font-size: 17px; }
.contact-list em { margin: 0 13px; color: #6b8997; font-style: normal; }

.contact-qr {
  padding: 30px;
  background: var(--white);
  color: var(--ink);
  text-align: center;
  box-shadow: 0 22px 55px rgba(0, 0, 0, .24);
}

.contact-qr > div { padding: 10px; background: #f4f7f8; }
.contact-qr img { width: 100%; aspect-ratio: 1; object-fit: contain; }
.contact-qr h3 { margin: 18px 0 3px; color: var(--navy-900); font-size: 19px; }
.contact-qr p { margin: 0; color: var(--muted); font-size: 13px; }

/* Footer & modal */
.site-footer { padding: 32px 0; border-top: 1px solid rgba(255, 255, 255, .08); background: #031824; color: #9bb0ba; }
.footer-bar { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.footer-bar > div { display: flex; flex-direction: column; }
.footer-bar strong { color: #e4edf1; }
.footer-bar span { font-size: 12px; }
.footer-bar p { margin: 0; text-align: right; font-size: 12px; }
.footer-bar a { color: #cde6ef; }
.footer-bar a:hover { color: var(--teal-100); }

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: none;
  padding: 70px 30px 35px;
  place-items: center;
  background: rgba(2, 14, 23, .92);
}

.lightbox.is-open { display: grid; }
.lightbox-image { max-width: min(1100px, 94vw); max-height: 78vh; object-fit: contain; box-shadow: 0 25px 70px rgba(0, 0, 0, .5); }
.lightbox-caption { position: absolute; bottom: 20px; margin: 0; color: var(--white); }
.lightbox-close { position: absolute; top: 20px; right: 25px; width: 46px; height: 46px; border: 1px solid rgba(255, 255, 255, .35); border-radius: 50%; background: transparent; color: var(--white); font-size: 28px; cursor: pointer; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .58s ease, transform .58s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 1120px) {
  .header-bar { grid-template-columns: minmax(265px, auto) 1fr auto; gap: 18px; }
  .brand img { width: 54px; height: 54px; }
  .brand-copy strong { font-size: 16px; }
  .brand-copy small { display: none; }
  .site-nav { gap: 14px; }
  .header-phone { min-width: 164px; }
  .header-phone strong { font-size: 17px; }
  .equipment-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .advantages-layout { gap: 45px; }
  .profile-layout { gap: 45px; }
  .contact-layout { gap: 50px; }
  .industry-solutions-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .header-bar { grid-template-columns: 1fr auto auto; min-height: 76px; }
  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 20px;
    left: 20px;
    display: none;
    padding: 10px;
    border: 1px solid var(--line);
    background: var(--white);
    box-shadow: var(--shadow);
    flex-direction: column;
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 11px 12px; }
  .site-nav a::after { display: none; }
  .nav-toggle { display: block; }
  .section-head { grid-template-columns: 1fr; gap: 16px; }
  .industry-solutions-head, .credentials-head { grid-template-columns: 1fr; gap: 14px; }
  .advantages-layout, .profile-layout { grid-template-columns: 1fr; }
  .advantages-intro { position: static; }
  .profile-gallery { max-width: 650px; }
}

@media (max-width: 768px) {
  :root { --container: min(100% - 28px, 680px); }
  html { scroll-padding-top: 72px; }
  .section { padding: 70px 0; }
  .header-bar { min-height: 72px; gap: 10px; }
  .brand { gap: 9px; }
  .brand img { width: 45px; height: 45px; }
  .brand-copy strong { max-width: 180px; font-size: 14px; white-space: normal; }
  .header-phone { min-width: 0; padding: 9px 10px; }
  .header-phone span { display: none; }
  .header-phone strong { font-size: 14px; white-space: nowrap; }
  .nav-toggle { width: 42px; height: 40px; }

  .hero { padding: 12px 0; }

  .business-pillar, .business-pillar:nth-child(even) { grid-template-columns: 1fr; }
  .business-pillar:nth-child(even) img { order: 0; }
  .business-pillar img { height: 220px; min-height: 220px; }
  .business-pillar-copy { padding: 30px 24px 34px; }
  .business-pillar-copy > span { top: 22px; right: 20px; font-size: 44px; }
  .business-pillar-copy h3 { padding-right: 45px; font-size: 21px; }

  .equipment-grid { grid-template-columns: 1fr; }
  .equipment-card > div { min-height: 0; }
  .equipment-tabs { margin-right: -14px; }
  .industry-solutions { margin-top: 64px; }
  .industry-solutions-grid { grid-template-columns: 1fr; }
  .industry-card-media { height: 230px; }
  .industry-card-copy { min-height: 160px; }

  .advantage-cards { grid-template-columns: 1fr; }
  .advantage-card { min-height: 0; }
  .advantage-card h3 { margin-top: 20px; }
  .process-line { display: grid; grid-template-columns: 1fr 1fr; }
  .process-line i { display: none; }

  .profile-gallery { min-height: 390px; }
  .profile-main { height: 340px; }
  .profile-small { height: 180px; border-width: 7px; }
  .profile-gallery > span { bottom: 18px; left: 18px; padding: 12px 16px; font-size: 9px; }
  .profile-facts { grid-template-columns: 1fr; }
  .credentials-gallery { margin-top: 56px; padding-top: 40px; }
  .credentials-grid { grid-template-columns: 1fr; }

  .contact-layout { grid-template-columns: 1fr; gap: 46px; }
  .contact-list li { grid-template-columns: 1fr; gap: 3px; }
  .contact-list strong { font-size: 15px; }
  .contact-list em { margin: 0 7px; }
  .contact-qr { width: min(100%, 330px); margin: 0 auto; }

  .footer-bar { align-items: flex-start; flex-direction: column; }
  .footer-bar p { text-align: left; }
}

@media (max-width: 430px) {
  .brand-copy strong { max-width: 138px; font-size: 12px; }
  .header-phone strong { font-size: 12px; }
  .section-head h2, .profile-copy h2, .contact-copy h2, .advantages-intro h2 { font-size: 31px; }
}