:root {
  color-scheme: light;
  --ink: #142b3e;
  --navy: #071e34;
  --navy-soft: #102f4d;
  --cyan: #00a9c6;
  --cyan-bright: #39c7d4;
  --paper: #ffffff;
  --mist: #f3f5f6;
  --line: #d9e0e3;
  --muted: #61717c;
  --container: 1280px;
  font-family: "Inter", "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body { margin: 0; min-width: 320px; font-size: 16px; line-height: 1.65; }
body:has(dialog[open]) { overflow: hidden; }
body, button, input, select, textarea { font-family: inherit; }
button, input, select, textarea { font-size: 15px; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
button { color: inherit; }
img { display: block; max-width: 100%; }
::selection { color: #fff; background: #087e99; }
:focus-visible { outline: 3px solid var(--cyan-bright); outline-offset: 3px; }

.container { width: min(var(--container), calc(100% - 72px)); margin-inline: auto; }
.site-header { position: sticky; top: 0; z-index: 20; background: #fff; border-bottom: 1px solid rgba(20, 43, 62, .09); }
.header-inner { min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 36px; }
.brand { display: inline-flex; align-items: center; gap: 13px; flex-shrink: 0; }
.brand img { width: 49px; height: 49px; object-fit: cover; object-position: 50% 42%; background: #fff; }
.brand span { display: block; max-width: 260px; font-size: 15px; line-height: 1.35; font-weight: 700; }
.desktop-nav { display: flex; align-items: center; gap: 32px; margin-left: auto; }
.desktop-nav a, .header-actions { font-size: 13px; font-weight: 600; }
.desktop-nav a { color: #314756; transition: color .18s ease; }
.desktop-nav a:hover, .footer a:hover { color: #008da8; }
.header-actions { display: flex; align-items: center; gap: 21px; white-space: nowrap; }
.language { font-size: 12px; color: #52636f; }
.header-contact { display: inline-flex; align-items: center; gap: 10px; min-height: 42px; padding: 0 16px; color: #fff; background: var(--navy); transition: background .2s ease; }
.header-contact:hover, .button-dark:hover { background: #144267; }
.header-contact svg, .button svg, .text-link svg, .scene svg, .project-card svg { width: 17px; height: 17px; flex: 0 0 auto; }
.menu-toggle, .mobile-nav { display: none; }

.hero { min-height: 610px; display: grid; grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr); color: #fff; background: var(--navy); }
.hero-copy { position: relative; min-width: 0; display: flex; flex-direction: column; justify-content: center; gap: 38px; padding: 80px 48px 70px max(36px, calc((100vw - var(--container)) / 2)); }
.hero-copy-inner { max-width: 560px; }
.hero h1 { max-width: 540px; margin: 0 0 25px; font-size: 59px; line-height: 1.18; font-weight: 600; letter-spacing: 0; }
body[data-lang="en"] .hero h1 { max-width: 540px; font-size: 50px; line-height: 1.18; }
.hero-copy-inner > p { max-width: 470px; margin: 0; color: #c5d0d8; font-size: 17px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 25px; margin-top: 34px; }
.button { min-height: 48px; display: inline-flex; justify-content: center; align-items: center; gap: 15px; padding: 0 20px; border: 0; border-radius: 3px; cursor: pointer; font-size: 14px; font-weight: 650; line-height: 1.2; transition: background .18s ease, color .18s ease, transform .18s ease; }
.button:hover { transform: translateY(-1px); }
.button-light { color: var(--navy); background: #fff; }
.button-light:hover { background: #e7f5f7; }
.button-cyan { color: var(--navy); background: #55d2dc; }
.button-cyan:hover { background: #7de0e6; }
.button-dark { color: #fff; background: var(--navy); }
.button-outline { color: var(--navy); background: #fff; border: 1px solid var(--line); }
.button-outline:hover { background: var(--mist); }
.text-link { display: inline-flex; align-items: center; gap: 11px; color: #12617b; font-size: 14px; font-weight: 650; }
.text-link-light { color: #e1f2f4; }
.text-link svg, .project-card svg { transition: transform .18s ease; }
.text-link:hover svg, .project-card:hover svg { transform: translateX(3px); }
.hero-caption { color: #8da2b2; font-size: 12px; }
.hero-media { position: relative; min-height: 610px; overflow: hidden; background: #243748; }
.hero-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 48%; }
.hero-image-corner { position: absolute; right: 0; bottom: 0; width: 82px; height: 82px; border-right: 10px solid var(--cyan); border-bottom: 10px solid var(--cyan); opacity: .86; }
.hero-rail { min-height: 86px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); padding-inline: max(36px, calc((100vw - var(--container)) / 2)); color: #fff; background: #0d2b46; }
.hero-rail > div { display: flex; align-items: center; gap: 18px; border-right: 1px solid rgba(255,255,255,.15); }
.hero-rail > div:last-child { border: 0; }
.hero-rail span { color: var(--cyan-bright); font-size: 12px; }
.hero-rail strong { font-size: 14px; font-weight: 550; }

.section { padding: 112px 0; }
.section-index { display: block; margin-bottom: 22px; color: #05839c; font-size: 11px; line-height: 1.2; font-weight: 700; text-transform: uppercase; }
.section-head h2, .cooperation-heading h2, .about-grid h2, .contact-grid h2 { margin: 0; font-size: 46px; line-height: 1.25; font-weight: 570; letter-spacing: 0; }
.section-head > p, .split-head > p { max-width: 470px; margin: 0; color: var(--muted); font-size: 16px; line-height: 1.85; }
.split-head { display: grid; grid-template-columns: 1fr minmax(290px, .58fr); align-items: end; gap: 70px; margin-bottom: 55px; }
.intro-section { padding-bottom: 104px; }
.scene-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.scene { min-height: 142px; display: grid; grid-template-columns: 35px 1fr 20px; align-items: start; gap: 12px; padding: 27px 27px 25px 0; border-right: 1px solid var(--line); }
.scene + .scene { padding-left: 27px; }
.scene:last-child { border-right: 0; }
.scene-number { color: #0c95ae; font-size: 11px; }
.scene h3 { margin: 0 0 8px; font-size: 18px; line-height: 1.4; font-weight: 650; }
.scene p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.scene svg { margin-top: 3px; color: #79909e; }

.services-section { background: var(--mist); }
.services-section .section-head { max-width: 740px; margin-bottom: 55px; }
.services-section .section-head h2 { margin-bottom: 13px; }
.services-section .section-head > p { font-size: 14px; }
.service-layout { display: grid; grid-template-columns: minmax(260px, .72fr) minmax(0, 1.6fr); gap: 64px; align-items: start; }
.service-tabs { display: flex; flex-direction: column; border-top: 1px solid #cfd9dd; }
.service-tab { min-height: 78px; display: grid; grid-template-columns: 34px 1fr 20px; gap: 12px; align-items: center; padding: 13px 11px 13px 0; border: 0; border-bottom: 1px solid #cfd9dd; border-left: 2px solid transparent; background: transparent; text-align: left; cursor: pointer; transition: border-color .18s ease, background .18s ease, padding .18s ease; }
.service-tab:hover, .service-tab.active { padding-left: 11px; border-left-color: var(--cyan); background: #fff; }
.tab-num { color: #008da8; font-size: 11px; }
.tab-text { display: grid; gap: 2px; }
.tab-text strong { font-size: 14px; line-height: 1.4; font-weight: 650; }
.tab-text small { color: #73838d; font-size: 11px; line-height: 1.5; }
.service-tab > svg { width: 16px; height: 16px; color: #6d8491; }
.service-panel { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 35px; align-items: center; min-height: 345px; padding: 18px; background: #fff; }
.service-photo { min-height: 302px; overflow: hidden; background: #dfe5e7; }
.service-photo img { width: 100%; height: 302px; object-fit: cover; object-position: center; transition: opacity .16s ease; }
.service-details { padding: 16px 20px 16px 0; }
.service-details h3 { margin: 0 0 15px; font-size: 23px; line-height: 1.35; font-weight: 620; }
.service-details > p { margin: 0 0 20px; color: var(--muted); font-size: 14px; line-height: 1.8; }
.service-details ul { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; }
.service-details li { display: flex; align-items: baseline; gap: 10px; color: #314958; font-size: 13px; }
.service-details li::before { width: 6px; height: 6px; flex: 0 0 auto; border-radius: 50%; background: var(--cyan); content: ""; }

.projects-section { padding-bottom: 118px; }
.projects-section .split-head { margin-bottom: 48px; }
.project-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 23px; }
.project-card { min-width: 0; padding: 0; border: 0; background: transparent; text-align: left; cursor: zoom-in; }
.project-card img { width: 100%; aspect-ratio: 1.28 / 1; object-fit: cover; background: #e7ebec; transition: filter .2s ease; }
.project-card:hover img { filter: brightness(.92); }
.project-card > span { min-height: 50px; display: flex; align-items: center; justify-content: space-between; gap: 8px; padding-top: 13px; border-bottom: 1px solid var(--line); font-size: 13px; font-weight: 600; }
.project-card svg { color: #0788a1; }

.cooperation-section { color: #fff; background: var(--navy-soft); }
.cooperation-section .section-index { color: #64d0dd; }
.cooperation-heading { display: grid; grid-template-columns: 1fr minmax(280px, .6fr); gap: 70px; align-items: end; margin-bottom: 50px; }
.cooperation-heading h2 { max-width: 690px; }
.cooperation-heading p { max-width: 450px; margin: 0; color: #c0ccd4; font-size: 15px; line-height: 1.8; }
.cooperation-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-bottom: 35px; border-top: 1px solid rgba(255,255,255,.22); border-bottom: 1px solid rgba(255,255,255,.22); }
.cooperation-grid article { min-height: 185px; padding: 23px 40px 28px 0; }
.cooperation-grid article + article { padding-left: 40px; border-left: 1px solid rgba(255,255,255,.22); }
.cooperation-grid article > span { color: #62d0dc; font-size: 11px; }
.cooperation-grid h3 { margin: 7px 0 8px; font-size: 21px; font-weight: 600; }
.cooperation-grid p { max-width: 510px; margin: 0; color: #c3ced5; font-size: 14px; line-height: 1.75; }
.cooperation-section .text-link { color: #74d8df; }

.about-section { background: #fff; }
.about-grid { display: grid; grid-template-columns: 1.3fr .7fr; gap: 100px; align-items: center; }
.about-grid > div:first-child { max-width: 760px; }
.about-grid h2 { margin-bottom: 22px; }
.about-grid > div:first-child > p { max-width: 690px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.9; }
.about-aside { padding: 7px 0 7px 40px; border-left: 1px solid var(--line); }
.about-aside strong { display: block; color: #008da8; font-size: 70px; line-height: 1; font-weight: 550; }
.about-aside p { margin: 15px 0 24px; color: #4e626f; font-size: 13px; line-height: 1.8; }
.about-aside > span { color: var(--ink); font-size: 13px; font-weight: 650; }

.contact-section { padding: 104px 0 110px; color: #fff; background: #081b2c; }
.contact-section .section-index { color: #68d7df; }
.contact-grid { display: grid; grid-template-columns: 1fr minmax(400px, .8fr); gap: 100px; align-items: start; }
.contact-grid h2 { max-width: 570px; font-size: 44px; }
.contact-grid > div:first-child > p { max-width: 470px; margin: 18px 0 0; color: #b8c4cc; font-size: 15px; line-height: 1.8; }
.contact-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; margin-top: 30px; }
.contact-info { display: grid; gap: 22px; }
.contact-info > div:not(.wechat) { padding-bottom: 18px; border-bottom: 1px solid rgba(255,255,255,.16); }
.contact-info small { display: block; margin-bottom: 6px; color: #8fa6b5; font-size: 11px; }
.contact-info > div > a { font-size: 23px; font-weight: 550; }
.contact-info > div > p { max-width: 515px; margin: 0; color: #e1e8ed; font-size: 13px; line-height: 1.7; }
.wechat { display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.wechat p { margin: 0; color: #c5d0d6; font-size: 12px; }
.wechat img { width: 128px; height: 112px; object-fit: contain; padding: 5px; background: white; }
.wechat-qr { width: 128px; height: 112px; flex: 0 0 auto; padding: 0; border: 0; background: #fff; cursor: zoom-in; }
.wechat-qr img { width: 100%; height: 100%; padding: 5px; object-fit: contain; }
.footer { color: #c2cbd1; background: #051421; }
.footer-inner { min-height: 86px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 20px; }
.footer-brand { display: flex; align-items: baseline; gap: 11px; color: #fff; font-size: 13px; font-weight: 700; }
.footer-brand span { color: #97a8b3; font-size: 11px; font-weight: 450; }
.footer-inner > div { display: flex; gap: 22px; font-size: 11px; }
.footer-inner > small { justify-self: end; font-size: 10px; }

dialog { max-width: calc(100vw - 32px); max-height: calc(100dvh - 32px); margin: auto; padding: 0; border: 0; color: var(--ink); background: #fff; box-shadow: 0 25px 90px rgba(0,0,0,.28); }
dialog::backdrop { background: rgba(4,17,29,.72); backdrop-filter: blur(2px); }
.inquiry-dialog { width: 590px; padding: 36px 40px 40px; overflow-y: auto; }
.dialog-head { display: flex; align-items: start; justify-content: space-between; gap: 16px; }
.dialog-head h2 { margin: 0; font-size: 27px; line-height: 1.3; font-weight: 620; }
.inquiry-dialog > p { margin: 10px 0 23px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.icon-close { width: 36px; height: 36px; display: grid; flex: 0 0 auto; place-items: center; padding: 0; border: 1px solid var(--line); border-radius: 50%; background: #fff; cursor: pointer; font-size: 23px; line-height: 1; }
#inquiry-form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 17px 15px; }
#inquiry-form label { display: grid; gap: 6px; font-size: 12px; font-weight: 600; }
#inquiry-form label:nth-child(3), #inquiry-form label:nth-child(4), #inquiry-form > button { grid-column: 1 / -1; }
#inquiry-form input, #inquiry-form select, #inquiry-form textarea { width: 100%; min-height: 43px; padding: 10px 11px; border: 1px solid #cfd9dd; border-radius: 2px; color: var(--ink); background: #fff; font-size: 14px; }
#inquiry-form textarea { min-height: 110px; resize: vertical; }
.inquiry-result { margin-top: 22px; }
.inquiry-result > p { color: #246b5c; font-size: 13px; }
.inquiry-result pre { max-height: 190px; overflow: auto; padding: 14px; border: 1px solid var(--line); white-space: pre-wrap; color: #314958; background: var(--mist); font: 12px/1.7 "Segoe UI", sans-serif; }
.inquiry-result > div { display: flex; flex-wrap: wrap; gap: 10px; }
.lightbox { width: min(1100px, calc(100vw - 38px)); max-height: calc(100dvh - 38px); padding: 14px; overflow: visible; background: #071e34; }
.lightbox .icon-close { position: absolute; top: -15px; right: -15px; }
.lightbox img { width: 100%; max-height: calc(100dvh - 100px); object-fit: contain; background: #061522; }
.lightbox p { margin: 8px 0 0; color: #dce8ec; font-size: 12px; }
.wechat-dialog { width: min(430px, calc(100vw - 40px)); padding: 22px; text-align: center; }
.wechat-dialog .icon-close { position: absolute; top: 8px; right: 8px; }
.wechat-dialog img { width: min(100%, 340px); height: auto; margin: 12px auto 0; }
.wechat-dialog p { margin: 10px 0 0; color: var(--muted); font-size: 13px; }

@media (max-width: 1050px) {
  .desktop-nav { gap: 20px; }
  .desktop-nav a { font-size: 12px; }
  .header-inner { gap: 18px; }
  .brand span { max-width: 220px; font-size: 13px; }
  .hero { grid-template-columns: minmax(0, .94fr) minmax(0, 1.06fr); min-height: 550px; }
  .hero-copy { padding-left: 36px; padding-right: 32px; }
  .hero h1 { font-size: 52px; }
  body[data-lang="en"] .hero h1 { font-size: 44px; }
  .hero-media { min-height: 550px; }
  .service-layout { grid-template-columns: 285px 1fr; gap: 35px; }
  .service-panel { grid-template-columns: 1fr; gap: 16px; }
  .service-photo { min-height: 260px; }
  .service-photo img { height: 260px; }
  .service-details { padding: 6px 10px 16px; }
  .about-grid, .contact-grid { gap: 58px; }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 70px; }
  .container { width: calc(100% - 40px); }
  .header-inner { min-height: 70px; gap: 12px; }
  .brand { gap: 9px; }
  .brand img { width: 40px; height: 40px; }
  .brand span { max-width: 150px; font-size: 12px; }
  .desktop-nav, .header-contact { display: none; }
  .header-actions { gap: 17px; margin-left: auto; }
  .language { font-size: 13px; }
  .menu-toggle { width: 40px; height: 40px; display: grid; align-content: center; justify-items: center; gap: 6px; padding: 0; border: 1px solid #dbe2e5; background: #fff; cursor: pointer; }
  .menu-toggle span { width: 17px; height: 1.5px; background: var(--navy); transition: transform .18s ease; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.8px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.8px) rotate(-45deg); }
  .mobile-nav { position: absolute; top: 69px; left: 0; right: 0; display: grid; max-height: 0; overflow: hidden; padding-inline: 20px; border-bottom: 0 solid var(--line); background: #fff; transition: max-height .24s ease, padding .24s ease; }
  .mobile-nav.open { max-height: 340px; padding-block: 12px 19px; border-bottom-width: 1px; }
  .mobile-nav a { min-height: 48px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid #edf0f2; font-size: 14px; font-weight: 550; }
  .mobile-nav a:last-child { color: #047e97; border-bottom: 0; }
  .hero { display: flex; flex-direction: column; min-height: 0; }
  .hero-copy { min-height: 0; gap: 20px; padding: 38px 24px 22px; }
  .hero-copy-inner { max-width: 530px; }
  .hero h1 { margin-bottom: 14px; font-size: 38px; line-height: 1.2; }
  body[data-lang="en"] .hero h1 { font-size: 37px; }
  .hero-copy-inner > p { max-width: 520px; font-size: 14px; line-height: 1.68; }
  .hero-actions { gap: 12px 18px; margin-top: 18px; }
  .button { min-height: 43px; padding-inline: 14px; font-size: 12px; }
  .hero-caption { font-size: 10px; }
  .hero-media { min-height: 0; aspect-ratio: 1.55 / 1; }
  .hero-media img { min-height: 0; aspect-ratio: 1.55 / 1; object-position: center 45%; }
  .hero-image-corner { width: 42px; height: 42px; border-width: 6px; }
  .hero-rail { min-height: 65px; padding-inline: 20px; }
  .hero-rail > div { gap: 8px; }
  .hero-rail span { font-size: 9px; }
  .hero-rail strong { font-size: 10px; }
  .section { padding: 64px 0; }
  .section-index { margin-bottom: 16px; font-size: 10px; }
  .section-head h2, .cooperation-heading h2, .about-grid h2, .contact-grid h2 { font-size: 34px; line-height: 1.3; }
  .split-head { grid-template-columns: 1fr; gap: 18px; margin-bottom: 31px; }
  .section-head > p, .split-head > p { max-width: 560px; font-size: 14px; line-height: 1.8; }
  .intro-section { padding-top: 38px; padding-bottom: 64px; }
  .scene-list { grid-template-columns: 1fr; }
  .scene, .scene + .scene { min-height: 105px; grid-template-columns: 29px 1fr 18px; padding: 19px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .scene:last-child { border-bottom: 0; }
  .scene h3 { margin-bottom: 5px; font-size: 16px; }
  .scene p { font-size: 12px; }
  .services-section .section-head { margin-bottom: 29px; }
  .service-layout { grid-template-columns: 1fr; gap: 22px; }
  .service-tabs { display: grid; grid-template-columns: 1fr; }
  .service-tab { min-height: 65px; grid-template-columns: 30px 1fr 18px; padding-block: 10px; }
  .service-tab:hover, .service-tab.active { padding-left: 10px; }
  .service-panel { min-height: 0; gap: 10px; padding: 12px; }
  .service-photo { min-height: 0; aspect-ratio: 1.35 / 1; }
  .service-photo img { height: 100%; min-height: 230px; aspect-ratio: 1.35 / 1; }
  .service-details { padding: 11px 7px 12px; }
  .service-details h3 { margin-bottom: 9px; font-size: 19px; }
  .service-details > p { margin-bottom: 14px; font-size: 13px; }
  .service-details li { font-size: 12px; }
  .project-grid { grid-template-columns: 1fr; gap: 25px; }
  .project-card img { aspect-ratio: 1.42 / 1; }
  .project-card > span { min-height: 44px; padding-top: 10px; font-size: 12px; }
  .cooperation-heading { grid-template-columns: 1fr; gap: 16px; margin-bottom: 31px; }
  .cooperation-heading h2 { max-width: 500px; }
  .cooperation-grid { grid-template-columns: 1fr; margin-bottom: 25px; }
  .cooperation-grid article { min-height: 0; padding: 19px 0 21px; }
  .cooperation-grid article + article { padding: 19px 0 21px; border-left: 0; border-top: 1px solid rgba(255,255,255,.22); }
  .cooperation-grid h3 { font-size: 18px; }
  .cooperation-grid p { font-size: 13px; }
  .about-grid { grid-template-columns: 1fr; gap: 35px; }
  .about-grid h2 { margin-bottom: 14px; }
  .about-grid > div:first-child > p { font-size: 14px; }
  .about-aside { padding: 0 0 0 22px; }
  .about-aside strong { font-size: 54px; }
  .about-aside p { margin: 11px 0 15px; }
  .contact-section { padding: 75px 0 79px; }
  .contact-grid { grid-template-columns: 1fr; gap: 42px; }
  .contact-grid h2 { font-size: 34px; }
  .contact-grid > div:first-child > p { margin-top: 13px; font-size: 14px; }
  .contact-actions { gap: 18px; margin-top: 23px; }
  .contact-info { gap: 18px; }
  .contact-info > div > a { font-size: 21px; }
  .wechat img { width: 117px; height: 105px; }
  .wechat-qr { width: 117px; height: 105px; }
  .footer-inner { min-height: 0; grid-template-columns: 1fr auto; gap: 10px; padding-block: 19px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-inner > div { font-size: 10px; }
  .footer-inner > small { grid-column: 1 / -1; justify-self: start; font-size: 9px; }
  .inquiry-dialog { padding: 25px 22px 27px; }
  .dialog-head h2 { font-size: 23px; }
  #inquiry-form { grid-template-columns: 1fr; gap: 14px; }
  #inquiry-form label:nth-child(3), #inquiry-form label:nth-child(4), #inquiry-form > button { grid-column: auto; }
  .inquiry-result > div .button { flex: 1 1 auto; }
}

@media (max-width: 375px) {
  .hero-copy { padding-inline: 18px; }
  body[data-lang="en"] .hero h1 { font-size: 31px; }
}

/* Full-bleed homepage photograph; the image remains behind all hero content. */
.hero-fullscreen { position: relative; isolation: isolate; display: flex; min-height: max(620px, calc(100svh - 85px)); overflow: hidden; }
.hero-fullscreen .hero-media { position: absolute; inset: 0; min-height: 0; aspect-ratio: auto; z-index: -2; }
.hero-fullscreen .hero-media img { width: 100%; height: 100%; min-height: 0; aspect-ratio: auto; object-fit: cover; object-position: 62% center; }
.hero-fullscreen::after { content: ''; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(3, 17, 30, .89) 0%, rgba(4, 20, 34, .76) 32%, rgba(4, 20, 34, .26) 68%, rgba(4, 20, 34, .1) 100%), linear-gradient(0deg, rgba(3, 17, 30, .7), transparent 30%); }
.hero-fullscreen .hero-copy { padding: 94px 0 110px; justify-content: center; }
.hero-fullscreen .hero-copy-inner { max-width: 820px; }
.hero-fullscreen h1, body[data-lang="en"] .hero-fullscreen h1 { max-width: 820px; font-size: clamp(48px, 5.4vw, 78px); line-height: 1.16; font-weight: 600; letter-spacing: -.02em; margin-bottom: 30px; }
.hero-fullscreen .hero-copy-inner > p { max-width: 530px; color: #edf2f6; font-size: 18px; line-height: 1.9; }
.hero-fullscreen .hero-actions { margin-top: 36px; gap: 30px; }
.hero-fullscreen .button { min-height: 52px; padding-inline: 25px; }
.hero-bottom { position: absolute; left: 0; right: 0; bottom: 31px; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-top: 1px solid #ffffff40; padding-top: 22px; }
.hero-fullscreen .hero-caption { color: #e0e8ef; font-size: 12px; }
.hero-scroll { display: flex; align-items: center; gap: 28px; color: #e0e8ef; font-size: 12px; }
.hero-scroll span { font-size: 20px; }
.hero-scroll:hover { color: #fff; }
.hero-photo-credit { color: var(--muted); font-size: 10px; padding-block: 0 22px; line-height: 1.8; }
.hero-photo-credit a { text-decoration: underline; text-underline-offset: 2px; }
@media (max-width: 760px) {
  .hero-fullscreen { min-height: max(590px, calc(100svh - 71px)); }
  .hero-fullscreen .hero-copy { padding: 72px 0 130px; flex: 1; }
  .hero-fullscreen .hero-media img { object-position: 58% center; }
  .hero-fullscreen::after { background: linear-gradient(90deg, rgba(3, 17, 30, .84), rgba(4, 20, 34, .48)), linear-gradient(0deg, rgba(3, 17, 30, .8), transparent 35%); }
  .hero-fullscreen h1, body[data-lang="en"] .hero-fullscreen h1 { font-size: clamp(36px, 9.8vw, 54px); margin-bottom: 25px; line-height: 1.2; }
  .hero-fullscreen .hero-copy-inner > p { font-size: 15px; line-height: 1.9; max-width: 500px; }
  .hero-fullscreen .hero-actions { gap: 23px; margin-top: 28px; }
  .hero-fullscreen .button { min-height: 48px; padding-inline: 18px; }
  .hero-bottom { bottom: 25px; padding-top: 18px; gap: 15px; }
  .hero-fullscreen .hero-caption, .hero-scroll { font-size: 10px; }
  .hero-scroll { gap: 12px; flex-shrink: 0; }
}

/* Interior pages share the engineering-led identity of the homepage. */
.skip-link { position: fixed; z-index: 100; left: 16px; top: -100px; padding: 12px 20px; background: var(--navy); color: white; }
.skip-link:focus { top: 10px; }
.desktop-nav a[aria-current="page"], .mobile-nav a[aria-current="page"], .footer-nav a[aria-current="page"] { color: #00798e; text-decoration: underline; text-underline-offset: 8px; }
.section-more { margin-top: 32px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 20px 35px; padding-block: 30px; border-bottom: 1px solid var(--line); font-size: 13px; }
.breadcrumb { padding-block: 20px; font-size: 12px; color: var(--muted); }
.breadcrumb nav { display: flex; gap: 14px; align-items: center; }
.breadcrumb a:hover { color: #00798e; }
.page-masthead { background: var(--navy); color: #fff; }
.masthead-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 64px; align-items: stretch; }
.masthead-copy { padding: 62px 0 30px; display: flex; flex-direction: column; align-items: flex-start; min-width: 0; }
.masthead-copy .section-index { color: #73d4df; letter-spacing: 1.4px; }
.masthead-copy h1 { margin: 4px 0 24px; font-size: clamp(35px, 3.4vw, 48px); font-weight: 580; line-height: 1.3; }
.masthead-copy > p { color: #c6d2dc; line-height: 1.9; margin: 0 0 35px; max-width: 560px; font-size: 15px; }
.masthead-bottom { width: 100%; display: flex; justify-content: space-between; gap: 20px; padding-top: 28px; margin-top: auto; border-top: 1px solid #345064; font-size: 11px; color: #b5c7d5; }
.masthead-bottom a { display: flex; gap: 20px; }
.masthead-grid figure { position: relative; margin: 0; min-height: 400px; overflow: hidden; }
.masthead-grid figure img { position: absolute; width: 100%; height: 100%; object-fit: cover; }
.masthead-grid figcaption { position: absolute; bottom: 0; inset-inline: 0; padding: 38px 20px 15px; background: linear-gradient(transparent, #071e34de); color: #fff; font-size: 11px; }
.detail-section { padding-block: 88px; }
.tone-mist { background: var(--mist); }
.detail-heading { max-width: 920px; margin-bottom: 42px; }
.detail-heading h2 { font-size: 38px; }
.detail-heading > p { max-width: 800px; }
.capability-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.capability-card { padding: 30px; border-bottom: 1px solid var(--line); border-right: 1px solid var(--line); background: #fff; }
.service-card-photo { margin: 0 0 25px; overflow: hidden; background: #eef1f4; }
.service-card-photo img { width: 100%; height: auto; aspect-ratio: 8 / 5; object-fit: cover; }
.image-credits { margin-top: 24px; color: var(--muted); font-size: 12px; line-height: 1.8; }
.image-credits summary { cursor: pointer; padding-block: 8px; }
.image-credits ul { margin: 12px 0 0; padding-left: 20px; }
.image-credits li { padding-block: 6px; overflow-wrap: anywhere; }
.image-credits a { text-decoration: underline; text-underline-offset: 3px; }
.image-credits a:hover { color: #00798e; }
.detail-number { color: #007f96; font-size: 12px; font-variant-numeric: tabular-nums; }
.capability-card h3, .editorial-split h3, .experience-list h3, .cooperation-models h3, .process-list h3, .timeline h3, .inquiry-guidance h3 { font-size: 22px; font-weight: 600; line-height: 1.4; margin: 18px 0 13px; }
.capability-card p, .editorial-split p, .experience-list p, .cooperation-models p, .process-list p, .timeline p, .inquiry-guidance p { font-size: 14px; color: #536775; line-height: 1.9; margin: 0; }
.scope-list { padding: 0; margin: 23px 0 0; list-style: none; }
.scope-list li { position: relative; padding: 8px 0 8px 16px; font-size: 13px; border-top: 1px solid #e6ebee; }
.scope-list li::before { content: ''; position: absolute; width: 4px; height: 4px; background: #0089a0; left: 0; top: 18px; }
.capability-grid + .text-link { margin-top: 30px; }
.editorial-split { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.editorial-split h3 { margin-top: 0; }
.editorial-split .lead-copy { font-size: 22px; line-height: 1.8; color: var(--ink); margin-bottom: 24px; }
.editorial-split .text-link { margin-top: 25px; }
.editorial-split > div > .scope-list:first-child { margin-top: 0; }
.detail-gallery figure { margin: 0; min-width: 0; }
.detail-gallery figcaption { font-size: 12px; color: #61717c; margin-top: 8px; }
.detail-gallery .project-card { width: 100%; }
.content-note { color: #657783; font-size: 12px; line-height: 1.8; margin: 26px 0; max-width: 900px; }
.experience-list article { display: grid; grid-template-columns: 180px 1fr; gap: 40px; padding: 35px 0; border-top: 1px solid var(--line); }
.experience-list h3 { margin-top: 0; }
.experience-year { color: #007d93; font-size: 40px; font-weight: 500; }
.tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.tag-row span { padding: 5px 12px; border: 1px solid #cbd7dd; font-size: 11px; }
.spec-table-wrap { overflow-x: auto; }
.spec-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 14px; }
.spec-table caption { text-align: left; padding-bottom: 20px; color: var(--muted); font-size: 13px; }
.spec-table th, .spec-table td { padding: 22px 25px; vertical-align: top; border-bottom: 1px solid var(--line); }
.spec-table thead { background: var(--navy); color: white; }
.spec-table tbody th { width: 28%; font-weight: 600; background: var(--mist); }
.spec-table td { color: #536775; }
.cooperation-models { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.cooperation-models article { padding: 40px; background: var(--mist); border-top: 3px solid #007e94; }
.cooperation-models h3 { margin-top: 0; font-size: 28px; }
.cooperation-models .text-link { margin-top: 24px; }
.process-list { margin: 0; padding: 0; list-style: none; }
.process-list li { display: grid; grid-template-columns: 70px 1.4fr 1fr; gap: 40px; padding: 30px 0; border-top: 1px solid #ccd6dd; }
.process-number { color: #007c91; font-size: 24px; }
.process-list h3 { margin: 0 0 10px; }
.process-output { padding-left: 30px; border-left: 1px solid #ccd6dd; }
.process-output small { display: block; color: #00768b; font-size: 11px; margin-bottom: 10px; }
.faq-list { max-width: 1040px; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; justify-content: space-between; gap: 20px; padding: 24px 0; font-size: 18px; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { color: #008298; font-size: 23px; line-height: 1.3; }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list details p { max-width: 900px; padding: 0 40px 25px 0; margin: 0; font-size: 14px; color: #536775; line-height: 1.9; }
.company-facts { border-top: 1px solid var(--line); }
.company-facts > div { display: flex; justify-content: space-between; gap: 24px; padding: 25px 0; border-bottom: 1px solid var(--line); }
.company-facts span { color: #657783; font-size: 13px; flex-shrink: 0; }
.company-facts strong { text-align: right; font-size: 16px; font-weight: 550; }
.timeline article { display: grid; grid-template-columns: 190px 1fr; gap: 65px; padding: 5px 0 44px; }
.timeline article > span { font-size: 45px; color: #007d93; line-height: 1.4; }
.timeline article > div { position: relative; padding: 10px 0 35px 40px; border-left: 1px solid #c4d3dc; }
.timeline article > div::before { content: ''; position: absolute; left: -5px; top: 23px; width: 9px; height: 9px; background: #00879e; }
.timeline h3 { margin-top: 0; }
.company-statement { padding: 80px 0; background: #eaf0f3; }
.company-statement h2 { font-size: 52px; font-weight: 500; line-height: 1.2; margin: 0 0 25px; }
.company-statement p { max-width: 740px; color: #536775; line-height: 1.9; }
.company-statement .text-link { margin-top: 16px; }
.inquiry-guidance { display: flex; gap: 40px; align-items: center; justify-content: space-between; padding: 35px; margin-top: 32px; border-left: 3px solid #00859a; background: var(--mist); }
.inquiry-guidance h3 { margin-top: 0; }
.inquiry-guidance > div { max-width: 800px; }
.inquiry-guidance .button { flex-shrink: 0; }
@media (max-width: 1050px) {
  .masthead-grid { gap: 32px; }
  .masthead-copy { padding-top: 40px; }
  .masthead-copy h1 { font-size: 35px; }
  .capability-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .editorial-split { gap: 36px; }
  .process-list li { gap: 20px; grid-template-columns: 40px 1.4fr 1fr; }
  .cooperation-models article { padding: 28px; }
  .inquiry-guidance { flex-direction: column; align-items: flex-start; gap: 20px; }
}
@media (max-width: 760px) {
  .breadcrumb { padding-block: 15px; font-size: 11px; }
  .masthead-grid { grid-template-columns: 1fr; gap: 0; }
  .masthead-copy { padding: 35px 0 25px; }
  .masthead-copy h1 { font-size: 32px; margin: 0 0 18px; }
  .masthead-copy > p { font-size: 14px; margin-bottom: 25px; }
  .masthead-bottom { padding-top: 20px; }
  .masthead-grid figure { min-height: 0; aspect-ratio: 1.55; }
  .detail-section { padding-block: 55px; }
  .detail-heading { margin-bottom: 28px; }
  .detail-heading h2 { font-size: 29px; }
  .capability-grid, .editorial-split, .cooperation-models { grid-template-columns: 1fr; }
  .capability-card { padding: 25px; }
  .capability-card h3 { font-size: 21px; margin-top: 12px; }
  .editorial-split { gap: 28px; }
  .editorial-split .lead-copy { font-size: 19px; }
  .experience-list article { grid-template-columns: 1fr; gap: 10px; }
  .experience-year { font-size: 32px; }
  .spec-table th, .spec-table td { padding: 15px 12px; font-size: 12px; }
  .spec-table tbody th { width: 35%; }
  .cooperation-models article { padding: 26px; }
  .cooperation-models h3 { font-size: 24px; }
  .process-list li { grid-template-columns: 30px 1fr; gap: 10px 16px; }
  .process-output { grid-column: 2; padding-left: 16px; margin-top: 10px !important; }
  .process-list h3 { font-size: 21px; }
  .faq-list summary { font-size: 16px; padding-block: 20px; }
  .faq-list details p { padding-right: 0; }
  .timeline article { grid-template-columns: 1fr; gap: 8px; padding-bottom: 20px; }
  .timeline article > span { font-size: 35px; }
  .timeline article > div { padding-left: 24px; }
  .company-statement { padding-block: 55px; }
  .company-statement h2 { font-size: 37px; }
  .company-facts strong { font-size: 14px; }
  .inquiry-guidance { padding: 24px; }
  .footer-nav { gap: 20px 24px; font-size: 12px; }
}
@media (max-width: 375px) {
  .masthead-copy h1 { font-size: 28px; }
  .company-facts > div { gap: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}