:root {
  --ink: #13201e;
  --muted: #5f6c69;
  --green: #123f38;
  --green-2: #1b6657;
  --aqua: #65c6b3;
  --amber: #d6a13c;
  --paper: #f5f7f3;
  --white: #ffffff;
  --line: #d8dfda;
  --radius: 6px;
  --shadow: 0 18px 50px rgba(13, 40, 34, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.65;
  letter-spacing: 0;
}
body.dialog-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font: inherit; }
.skip-link { position: fixed; left: 12px; top: -60px; z-index: 1000; padding: 10px 14px; background: var(--white); color: var(--ink); border-radius: 4px; }
.skip-link:focus { top: 12px; }
.section-inner { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.section { padding: 112px 0; }
.section-kicker, .eyebrow { margin: 0 0 18px; color: var(--green-2); font: 700 12px/1.2 Arial, sans-serif; letter-spacing: 2.2px; }
.section h2 { margin: 0; font-size: clamp(32px, 4.2vw, 56px); line-height: 1.16; font-weight: 760; }

.site-header { position: fixed; inset: 0 0 auto; height: 82px; z-index: 100; color: var(--white); transition: background .3s, box-shadow .3s, height .3s; }
.site-header.scrolled { height: 70px; color: var(--ink); background: rgba(255,255,255,.95); box-shadow: 0 1px 0 rgba(18,63,56,.12); backdrop-filter: blur(14px); }
.header-inner { width: min(1320px, calc(100% - 48px)); height: 100%; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: flex; align-items: center; min-width: 0; gap: 12px; }
.brand img { width: 46px; height: 43px; object-fit: contain; background: #fff; border-radius: 4px; padding: 3px; }
.brand-copy { display: flex; flex-direction: column; min-width: 0; }
.brand-copy strong { font-size: 16px; line-height: 1.3; white-space: nowrap; }
.brand-copy small { margin-top: 3px; font: 600 8px/1 Arial, sans-serif; letter-spacing: 1px; opacity: .7; }
.site-nav { display: flex; align-items: center; gap: 30px; font-size: 14px; font-weight: 600; }
.site-nav > a { position: relative; white-space: nowrap; }
.site-nav > a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -8px; height: 2px; background: var(--aqua); transition: right .25s; }
.site-nav > a:hover::after, .site-nav > a:focus-visible::after { right: 0; }
.nav-cta { padding: 10px 18px; border: 1px solid rgba(255,255,255,.7); border-radius: 4px; }
.scrolled .nav-cta { color: var(--white); background: var(--green); border-color: var(--green); }
.menu-toggle { display: none; width: 42px; height: 42px; border: 0; background: transparent; color: currentColor; padding: 10px; cursor: pointer; }
.menu-toggle span { display: block; height: 2px; background: currentColor; margin: 5px 0; transition: transform .25s, opacity .25s; }

.hero { position: relative; min-height: min(680px, 92svh); height: min(920px, 92svh); overflow: hidden; color: var(--white); background: #0b2a27; isolation: isolate; }
#industry-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -3; }
.hero-scrim { position: absolute; inset: 0; z-index: -2; background: linear-gradient(90deg, rgba(5,28,26,.91) 0%, rgba(5,28,26,.67) 46%, rgba(5,28,26,.12) 78%), linear-gradient(0deg, rgba(5,28,26,.55), transparent 44%); }
.hero::after { content: ""; position: absolute; inset: 0; z-index: -1; opacity: .16; background-image: linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px); background-size: 72px 72px; mask-image: linear-gradient(to right, #000, transparent 75%); }
.hero-inner { width: min(1320px, calc(100% - 48px)); height: 100%; margin: 0 auto; display: flex; flex-direction: column; justify-content: center; padding-top: 76px; }
.hero .eyebrow { color: #9bd9cd; }
.hero h1 { max-width: 820px; margin: 0; font-size: clamp(48px, 6.6vw, 94px); line-height: 1.04; font-weight: 760; }
.hero-lead { max-width: 660px; margin: 28px 0 0; color: rgba(255,255,255,.8); font-size: 18px; }
.hero-actions { display: flex; gap: 12px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-width: 132px; height: 48px; padding: 0 22px; border: 1px solid transparent; border-radius: 4px; font-weight: 700; font-size: 14px; transition: transform .2s, background .2s, border .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--amber); color: #17211f; }
.button-primary:hover { background: #e5b557; }
.button-secondary { border-color: rgba(255,255,255,.55); color: var(--white); }
.button-secondary:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.hero-facts { position: absolute; right: max(24px, calc((100vw - 1320px) / 2)); bottom: 58px; display: flex; margin: 0; }
.hero-facts div { min-width: 132px; padding: 0 22px; border-left: 1px solid rgba(255,255,255,.28); }
.hero-facts dt { font: 700 28px/1.1 Arial, sans-serif; }
.hero-facts dd { margin: 8px 0 0; color: rgba(255,255,255,.65); font-size: 12px; }
.hero-next { position: absolute; left: 50%; bottom: 26px; width: 32px; height: 42px; border: 1px solid rgba(255,255,255,.35); border-radius: 18px; }
.hero-next span { position: absolute; left: 50%; top: 9px; width: 4px; height: 8px; border-radius: 2px; background: var(--white); transform: translateX(-50%); animation: scrollHint 1.8s infinite; }
@keyframes scrollHint { 0% { transform: translate(-50%,0); opacity: 0; } 30% { opacity: 1; } 100% { transform: translate(-50%,13px); opacity: 0; } }

.trust-strip { background: var(--white); border-bottom: 1px solid var(--line); }
.trust-items { min-height: 84px; display: grid; grid-template-columns: repeat(4, 1fr); align-items: center; }
.trust-items span { padding: 4px 22px; text-align: center; font-weight: 700; font-size: 14px; border-right: 1px solid var(--line); }
.trust-items span:last-child { border: 0; }
.split-heading { display: grid; grid-template-columns: 1.25fr .75fr; gap: 64px; align-items: end; margin-bottom: 64px; }
.split-heading > p { max-width: 500px; margin: 0 0 5px; color: var(--muted); }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.service-item { position: relative; min-height: 490px; padding: 48px 38px 42px; border-right: 1px solid var(--line); transition: background .3s, transform .3s; }
.service-item:first-child { border-left: 1px solid var(--line); }
.service-item:hover { background: var(--white); transform: translateY(-5px); box-shadow: var(--shadow); }
.service-index { color: #98a39f; font: 700 12px/1 Arial, sans-serif; }
.service-mark { position: relative; width: 94px; height: 94px; margin: 54px 0 30px; }
.service-mark::before, .service-mark::after, .service-mark i { position: absolute; content: ""; display: block; }
.service-mark.chemical::before { left: 25px; top: 2px; width: 42px; height: 68px; border: 3px solid var(--green-2); border-top: 0; border-radius: 0 0 25px 25px; }
.service-mark.chemical::after { left: 16px; top: 0; width: 60px; height: 3px; background: var(--green-2); }
.service-mark.chemical i { border-radius: 50%; background: var(--amber); }
.service-mark.chemical i:nth-child(1) { width: 9px; height: 9px; left: 37px; top: 44px; }
.service-mark.chemical i:nth-child(2) { width: 6px; height: 6px; left: 51px; top: 36px; }
.service-mark.chemical i:nth-child(3) { width: 10px; height: 10px; left: 48px; top: 56px; }
.service-mark.water::before { left: 39px; top: 5px; width: 31px; height: 62px; border: 3px solid var(--green-2); border-radius: 70% 30% 65% 35% / 70% 40% 60% 30%; transform: rotate(35deg); }
.service-mark.water::after { left: 2px; top: 52px; width: 52px; height: 3px; background: var(--amber); transform: rotate(-14deg); transform-origin: right; box-shadow: 0 10px 0 rgba(214,161,60,.6); }
.service-mark.testing::before { left: 14px; top: 11px; width: 58px; height: 58px; border: 3px solid var(--green-2); border-radius: 50%; }
.service-mark.testing::after { left: 60px; top: 64px; width: 32px; height: 3px; background: var(--green-2); transform: rotate(45deg); }
.service-mark.testing i { left: 32px; top: 28px; width: 22px; height: 22px; border: 3px solid var(--amber); border-radius: 50%; }
.service-item h3 { margin: 0; font-size: 24px; line-height: 1.35; }
.service-item p { min-height: 92px; margin: 18px 0 24px; color: var(--muted); font-size: 15px; }
.service-item ul { display: flex; flex-wrap: wrap; gap: 8px 14px; margin: 0; padding: 0; list-style: none; color: var(--green-2); font-size: 13px; font-weight: 700; }

.process-band { color: var(--white); background: var(--green); }
.process-band .section-kicker { color: var(--aqua); }
.process-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 100px; }
.process-intro > p:last-child { margin: 30px 0 0; max-width: 420px; color: rgba(255,255,255,.66); }
.process-list { margin: 0; padding: 0; list-style: none; counter-reset: process; }
.process-list li { display: grid; grid-template-columns: 64px 1fr; gap: 20px; padding: 24px 0; border-bottom: 1px solid rgba(255,255,255,.16); }
.process-list li:first-child { border-top: 1px solid rgba(255,255,255,.16); }
.process-list > li > span { color: var(--aqua); font: 700 12px/1.5 Arial, sans-serif; }
.process-list h3 { margin: 0; font-size: 21px; }
.process-list p { margin: 6px 0 0; color: rgba(255,255,255,.58); font-size: 14px; }

.about { background: var(--white); }
.about-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; align-items: center; }
.about-visual { position: relative; min-height: 500px; display: flex; flex-direction: column; justify-content: center; padding: 55px; color: var(--white); background: #183c37; overflow: hidden; }
.about-visual::before { content: ""; position: absolute; width: 410px; height: 410px; right: -190px; top: -160px; border: 72px solid rgba(101,198,179,.12); border-radius: 50%; }
.about-visual::after { content: ""; position: absolute; inset: 22px; border: 1px solid rgba(255,255,255,.18); pointer-events: none; }
.about-word { position: relative; z-index: 1; font: 700 clamp(84px, 12vw, 144px)/.9 Arial, sans-serif; }
.about-word span { color: var(--amber); font-size: .48em; vertical-align: top; }
.about-visual > p { position: relative; z-index: 1; margin: 22px 0 0; color: rgba(255,255,255,.65); }
.principle-grid { position: absolute; z-index: 1; left: 55px; right: 55px; bottom: 48px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.22); }
.principle-grid span { padding-top: 18px; font-size: 13px; font-weight: 700; }
.about-copy h2 { margin-bottom: 32px; }
.about-copy > p:not(.section-kicker) { margin: 0 0 18px; color: var(--muted); font-size: 16px; }
.text-link { display: inline-flex; align-items: center; gap: 12px; margin-top: 16px; color: var(--green-2); font-weight: 700; }
.text-link span { font-size: 22px; transition: transform .2s; }
.text-link:hover span { transform: translateX(5px); }

.credentials { background: #edf1ed; }
.credential-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.credential-card { position: relative; display: grid; grid-template-columns: 106px 1fr; gap: 22px; align-items: center; min-height: 160px; padding: 18px; color: var(--ink); background: var(--white); border: 1px solid transparent; border-radius: var(--radius); text-align: left; cursor: pointer; overflow: hidden; transition: transform .25s, box-shadow .25s, border .25s; }
.credential-card:hover { transform: translateY(-4px); box-shadow: 0 14px 35px rgba(18,63,56,.1); border-color: rgba(27,102,87,.2); }
.credential-card img { width: 106px; height: 124px; object-fit: cover; object-position: top; border: 1px solid var(--line); background: #f2f2ef; }
.credential-card span { display: flex; flex-direction: column; min-width: 0; }
.credential-card b { font-size: 17px; line-height: 1.4; }
.credential-card small { margin-top: 8px; color: var(--muted); }

.contact { padding: 120px 0; color: var(--white); background: #17201f; }
.contact .section-kicker { color: var(--amber); }
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 110px; align-items: start; }
.contact-copy h2 { margin: 0; font-size: clamp(38px, 4.5vw, 62px); line-height: 1.15; }
.contact-copy > p:last-child { max-width: 500px; margin: 30px 0 0; color: rgba(255,255,255,.6); }
.phone { display: block; padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,.16); }
.phone small { display: block; margin-bottom: 10px; color: rgba(255,255,255,.56); }
.phone strong { color: var(--aqua); font: 700 clamp(32px, 4vw, 52px)/1 Arial, sans-serif; }
.contact-details dl { margin: 28px 0 0; }
.contact-details dl div { display: grid; grid-template-columns: 135px 1fr; gap: 18px; padding: 12px 0; }
.contact-details dt { color: rgba(255,255,255,.45); font-size: 13px; }
.contact-details dd { margin: 0; color: rgba(255,255,255,.82); font-size: 14px; }

.site-footer { color: rgba(255,255,255,.58); background: #0e1615; font-size: 12px; }
.footer-inner { min-height: 96px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: rgba(255,255,255,.85); font-weight: 700; }
.footer-brand img { width: 36px; height: 34px; object-fit: contain; background: #fff; border-radius: 3px; padding: 2px; }
.icp-link { color: rgba(255,255,255,.58); transition: color .2s; }
.icp-link:hover, .icp-link:focus-visible { color: var(--aqua); }

.certificate-dialog { width: min(920px, calc(100% - 32px)); max-height: calc(100svh - 32px); padding: 0; border: 0; border-radius: 6px; box-shadow: 0 30px 90px rgba(0,0,0,.35); background: #f6f6f2; }
.certificate-dialog::backdrop { background: rgba(5,16,15,.78); backdrop-filter: blur(4px); }
.dialog-header { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; justify-content: space-between; min-height: 62px; padding: 0 18px 0 24px; background: rgba(255,255,255,.95); border-bottom: 1px solid var(--line); }
.dialog-header h2 { margin: 0; font-size: 17px; }
.dialog-close { width: 40px; height: 40px; border: 0; color: var(--ink); background: transparent; font-size: 30px; line-height: 1; cursor: pointer; }
.dialog-body { padding: 24px; }
.dialog-body img { max-height: calc(100svh - 126px); margin: 0 auto; object-fit: contain; }
.dialog-controls { position: sticky; bottom: 0; align-items: center; justify-content: center; gap: 16px; min-height: 58px; background: rgba(255,255,255,.96); border-top: 1px solid var(--line); }
.dialog-controls:not([hidden]) { display: flex; }
.dialog-controls button { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 4px; color: var(--ink); background: var(--white); cursor: pointer; }
.dialog-controls button:disabled { opacity: .35; cursor: default; }
.dialog-page { min-width: 70px; text-align: center; color: var(--muted); font-size: 13px; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .site-header, .site-header.scrolled { height: 70px; }
  .header-inner { width: min(100% - 32px, 1320px); }
  .brand-copy strong { font-size: 14px; }
  .brand-copy small { display: none; }
  .menu-toggle { display: block; z-index: 2; }
  .menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle.active span:nth-child(2) { opacity: 0; }
  .menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .site-nav { position: fixed; inset: 70px 0 auto; display: grid; gap: 0; padding: 18px 24px 26px; color: var(--ink); background: #fff; box-shadow: 0 14px 30px rgba(0,0,0,.12); transform: translateY(-130%); opacity: 0; visibility: hidden; transition: transform .3s, opacity .3s, visibility .3s; }
  .site-nav.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .site-nav > a { padding: 13px 0; border-bottom: 1px solid var(--line); }
  .site-nav > .nav-cta { margin-top: 12px; padding: 13px; text-align: center; color: #fff; background: var(--green); border: 0; }
  .site-header:not(.scrolled) { background: rgba(7,35,32,.72); backdrop-filter: blur(10px); }
  .hero-facts { right: 24px; }
  .split-heading, .process-layout, .about-layout, .contact-layout { grid-template-columns: 1fr; gap: 52px; }
  .service-item { padding-inline: 26px; }
  .credential-grid { grid-template-columns: repeat(2, 1fr); }
  .about-visual { min-height: 430px; }
}

@media (max-width: 700px) {
  .section-inner { width: min(100% - 32px, 1180px); }
  .section { padding: 82px 0; }
  .brand img { width: 40px; height: 38px; }
  .brand-copy strong { width: calc(100vw - 158px); max-width: 225px; overflow: hidden; text-overflow: ellipsis; }
  .hero { min-height: min(680px, 92svh); height: 92svh; }
  .hero-inner { width: min(100% - 32px, 1320px); justify-content: center; padding-top: 58px; padding-bottom: 126px; }
  .hero h1 { font-size: clamp(42px, 13vw, 64px); }
  .hero-lead { font-size: 15px; margin-top: 22px; }
  .hero-actions { margin-top: 28px; }
  .button { min-width: 120px; }
  .hero-facts { left: 16px; right: 16px; bottom: 28px; justify-content: center; }
  .hero-facts div { min-width: 0; flex: 1; padding: 0 12px; }
  .hero-facts dt { font-size: 20px; }
  .hero-facts dd { font-size: 10px; }
  .hero-next { display: none; }
  .trust-items { grid-template-columns: repeat(2, 1fr); padding: 10px 0; }
  .trust-items span { padding: 10px 8px; border-right: 0; font-size: 12px; }
  .split-heading { gap: 24px; margin-bottom: 42px; }
  .section h2 { font-size: 36px; }
  .service-grid { grid-template-columns: 1fr; }
  .service-item, .service-item:first-child { min-height: auto; border: 0; border-bottom: 1px solid var(--line); padding: 38px 18px; }
  .service-mark { margin: 34px 0 24px; }
  .service-item p { min-height: auto; }
  .process-layout { gap: 42px; }
  .process-list li { grid-template-columns: 48px 1fr; }
  .about-layout { gap: 48px; }
  .about-visual { min-height: 390px; padding: 36px; }
  .about-visual::after { inset: 14px; }
  .principle-grid { left: 36px; right: 36px; bottom: 34px; }
  .principle-grid span { font-size: 11px; }
  .credential-grid { grid-template-columns: 1fr; gap: 12px; }
  .credential-card { min-height: 142px; grid-template-columns: 88px 1fr; }
  .credential-card img { width: 88px; height: 106px; }
  .contact { padding: 88px 0; }
  .contact-layout { gap: 52px; }
  .contact-details dl div { grid-template-columns: 1fr; gap: 4px; }
  .footer-inner { flex-direction: column; justify-content: center; padding: 28px 0; text-align: center; }
  .footer-inner p { margin: 0; }
  .dialog-body { padding: 12px; }
  .dialog-body img { max-height: calc(100svh - 180px); }
}

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