:root {
  --ink: #17211f;
  --muted: #5c6864;
  --green: #174d45;
  --green-deep: #0b332f;
  --lime: #d7ef6a;
  --orange: #de6b35;
  --paper: #f5f3ec;
  --panel: #e7e9e1;
  --white: #fff;
  --line: rgba(23, 33, 31, .18);
  --container: 1240px;
  --shadow: 0 20px 48px rgba(17, 40, 35, .15);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; color: var(--ink); background: var(--paper); font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; line-height: 1.7; }
body.nav-open { overflow: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.container { width: min(var(--container), calc(100% - 48px)); margin-inline: auto; }
.section { padding: 66px 0; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 1000; top: -80px; left: 16px; padding: 9px 14px; color: var(--white); background: var(--green); }
.skip-link:focus { top: 12px; }
.kicker { margin: 0 0 8px; color: var(--orange); font-size: 11px; font-weight: 900; letter-spacing: .18em; }

.site-header { position: sticky; z-index: 100; top: 0; background: rgba(245,243,236,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.nav-shell { display: flex; min-height: 75px; align-items: center; gap: 24px; }
.brand { flex: 0 0 174px; }
.brand img { width: 174px; height: 62px; object-fit: contain; }
.site-nav { display: flex; align-items: center; gap: 23px; margin-left: auto; }
.site-nav a { padding: 26px 0 23px; color: #2c3734; font-size: 14px; font-weight: 800; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--green); }
.nav-phone { display: grid; padding: 8px 14px; color: var(--white); background: var(--green); font-size: 15px; font-weight: 900; line-height: 1.22; }
.nav-phone small { color: #b8d3cd; font-size: 9px; letter-spacing: .13em; }
.nav-toggle { display: none; }

.hero { background: var(--paper); }
.hero-layout { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(440px, .92fr); gap: 48px; min-height: 620px; align-items: center; padding-top: 38px; padding-bottom: 38px; }
.hero-status { display: flex; width: fit-content; align-items: center; margin-bottom: 18px; border: 1px solid var(--green); }
.hero-status span { padding: 5px 9px; color: var(--white); background: var(--green); font-size: 10px; font-weight: 900; letter-spacing: .14em; }
.hero-status b { padding: 5px 10px; color: var(--green); font-size: 11px; }
.hero h1 { max-width: 780px; margin: 0; font-size: clamp(36px, 3.45vw, 53px); line-height: 1.12; letter-spacing: -.035em; text-wrap: balance; }
.hero-lead { max-width: 760px; margin: 0; color: #4d5a56; font-size: 16px; }
.service-area { margin: 11px 0 0; color: #5e6b67; font-size: 14px; }
.hero-phone { margin: 13px 0 0; font-weight: 800; }
.hero-phone a { color: var(--green); font-size: 20px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 17px; }
.hero-tags span { padding: 6px 10px; color: var(--green-deep); background: #e2e8d4; border: 1px solid #c9d0bc; font-size: 12px; font-weight: 700; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 22px; }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 10px 17px; border: 1px solid transparent; font-weight: 900; transition: background .2s ease, color .2s ease; }
.button-accent { color: var(--ink); background: var(--lime); border-color: var(--lime); }
.button-accent:hover, .button-accent:focus-visible { background: #c3dd4f; }
.button-light { color: var(--green); border-color: var(--green); }
.button-light:hover, .button-light:focus-visible { color: var(--white); background: var(--green); }

.project-board { overflow: hidden; background: var(--white); border: 1px solid var(--line); box-shadow: var(--shadow); }
.board-head { display: flex; min-height: 42px; align-items: center; justify-content: space-between; gap: 12px; padding: 8px 13px; color: var(--white); background: var(--green-deep); font-size: 9px; letter-spacing: .12em; }
.board-head strong { color: var(--lime); font-family: Consolas, monospace; font-size: 10px; }
.board-photo { position: relative; margin: 0; }
.board-photo img { width: 100%; height: 315px; object-fit: cover; }
.board-photo figcaption { position: absolute; right: 11px; bottom: 11px; padding: 5px 8px; color: var(--white); background: rgba(11,51,47,.88); font-size: 11px; font-weight: 800; }
.board-fields { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.board-fields > div { display: grid; grid-template-columns: 34px 45px 1fr; align-items: center; gap: 7px; padding: 11px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.board-fields span { color: var(--orange); font-family: Consolas, monospace; font-size: 11px; }
.board-fields b { font-size: 12px; }
.board-fields p { margin: 0; color: var(--muted); font-size: 11px; }
.board-footer { display: grid; grid-template-columns: auto 1fr auto 1fr; gap: 10px; padding: 12px 13px; background: #eef0e9; font-size: 11px; }
.board-footer span { color: #6a7672; }
.board-footer strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.intake-section { padding: 58px 0; color: var(--white); background: var(--green); }
.intake-layout { display: grid; grid-template-columns: minmax(260px, .62fr) minmax(0, 1.38fr); gap: 44px; }
.intake-heading .kicker { color: var(--lime); }
.intake-heading h2 { margin: 0 0 12px; font-size: clamp(28px, 3.1vw, 41px); line-height: 1.24; }
.intake-heading > p:not(.kicker) { color: #c5d9d5; }
.intake-heading a { display: inline-block; margin-top: 8px; padding-bottom: 3px; border-bottom: 2px solid var(--lime); color: var(--lime); font-weight: 900; }
.intake-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid rgba(255,255,255,.23); border-left: 1px solid rgba(255,255,255,.23); }
.intake-grid article { display: grid; grid-template-columns: 35px 1fr; gap: 0 8px; padding: 14px; border-right: 1px solid rgba(255,255,255,.23); border-bottom: 1px solid rgba(255,255,255,.23); }
.intake-grid span { grid-row: 1 / 3; color: var(--lime); font-family: Consolas, monospace; font-size: 11px; }
.intake-grid strong { font-size: 15px; }
.intake-grid p { margin: 2px 0 0; color: #c9dbd7; font-size: 12px; }

.project-requirements { padding: 56px 0; color: var(--ink); background: var(--lime); }
.ai-layout { display: grid; grid-template-columns: 190px minmax(0,1fr); }
.ai-index { display: grid; align-content: center; padding-right: 28px; border-right: 1px solid rgba(23,33,31,.35); }
.ai-index span { font-size: 9px; font-weight: 900; letter-spacing: .16em; }
.ai-index strong { font-size: 59px; line-height: 1; }
.ai-index b { margin-top: 4px; font-size: 17px; }
.ai-copy { padding-left: 34px; }
.ai-copy .kicker { color: var(--green); }
.ai-copy h2 { margin: 0 0 10px; font-size: clamp(27px, 3.1vw, 41px); line-height: 1.25; }
.ai-copy > p:not(.kicker) { max-width: 960px; margin: 0; }
.ai-copy a { display: inline-block; margin-top: 10px; padding-bottom: 2px; border-bottom: 1px solid var(--ink); font-weight: 900; }

.workflow-section { padding: 66px 0; background: var(--white); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 42px; margin-bottom: 28px; }
.section-heading h2 { max-width: 760px; margin: 0; font-size: clamp(28px, 3.35vw, 44px); line-height: 1.24; letter-spacing: -.025em; }
.section-heading > p { max-width: 430px; margin: 0; color: var(--muted); }
.delivery-track { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.delivery-track li { display: grid; grid-template-columns: 43px 1fr; gap: 9px; min-height: 132px; padding: 17px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.delivery-track li:hover { background: #eef3e9; }
.delivery-track span { color: var(--orange); font-family: Consolas, monospace; font-size: 12px; font-weight: 900; }
.delivery-track strong { font-size: 17px; }
.delivery-track p { margin: 5px 0 0; color: var(--muted); font-size: 13px; }

.capabilities-section { background: var(--panel); }
.capability-ledger { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 12px; }
.capability-ledger article { min-height: 175px; padding: 20px; background: var(--white); border-top: 4px solid var(--green); }
.capability-ledger span { color: var(--orange); font-family: Consolas, monospace; font-size: 9px; letter-spacing: .12em; }
.capability-ledger h3 { margin: 17px 0 7px; font-size: 19px; }
.capability-ledger p { margin: 0; color: var(--muted); font-size: 13px; }

.gallery-section { background: var(--green-deep); color: var(--white); }
.gallery-heading .kicker { color: var(--lime); }
.gallery-heading > p { color: #b5cac5; }
.project-gallery { display: grid; grid-template-columns: repeat(12, minmax(0,1fr)); gap: 12px; }
.gallery-item { grid-column: span 3; margin: 0; overflow: hidden; background: #f7f6f1; color: var(--ink); }
.gallery-item:nth-child(1), .gallery-item:nth-child(2) { grid-column: span 6; }
.gallery-item img { width: 100%; height: 205px; object-fit: contain; background: #f8f7f2; }
.gallery-item:nth-child(1) img, .gallery-item:nth-child(2) img { height: 300px; }
.gallery-equipment img, .gallery-inspection img { object-fit: cover; }
.gallery-item figcaption { display: flex; min-height: 53px; align-items: center; gap: 11px; padding: 10px 12px; }
.gallery-item figcaption span { color: var(--orange); font-family: Consolas, monospace; font-size: 10px; }
.gallery-item figcaption strong { font-size: 13px; }

.delivery-evaluation { color: var(--white); background: var(--orange); }
.evaluation-layout { display: grid; grid-template-columns: minmax(290px,.72fr) minmax(0,1.28fr); gap: 55px; }
.evaluation-head > span { display: inline-block; margin-bottom: 22px; padding: 5px 8px; color: var(--lime); background: var(--green-deep); font-size: 9px; font-weight: 900; letter-spacing: .15em; }
.evaluation-head .kicker { color: #552712; }
.evaluation-head h2 { margin: 0; font-size: clamp(29px,3.3vw,43px); line-height: 1.24; }
.evaluation-copy > p { margin: 3px 0 22px; }
.evaluation-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.evaluation-tags span { padding: 6px 9px; border: 1px solid rgba(255,255,255,.5); font-size: 12px; }

.risk-section { padding: 64px 0; background: var(--paper); }
.risk-layout { display: grid; grid-template-columns: minmax(240px,.5fr) minmax(0,1.5fr); gap: 48px; }
.risk-title h2 { margin: 0; font-size: clamp(28px,3.2vw,42px); line-height: 1.24; }
.risk-table { border-top: 1px solid var(--line); }
.risk-row { display: grid; grid-template-columns: .65fr .85fr 1.5fr; align-items: center; min-height: 65px; border-bottom: 1px solid var(--line); }
.risk-row > * { margin: 0; padding: 12px; }
.risk-row strong { font-size: 14px; }
.risk-row span, .risk-row p { color: var(--muted); font-size: 12px; }
.risk-header { min-height: 40px; color: var(--white); background: var(--green); font-size: 10px; font-weight: 900; letter-spacing: .08em; }
.risk-header span { color: var(--white); }

.equipment-section { background: var(--white); }
.equipment-gallery { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; }
.equipment-gallery figure { position: relative; margin: 0; overflow: hidden; background: var(--panel); }
.equipment-gallery img { width: 100%; height: 230px; object-fit: cover; }
.equipment-gallery figure:nth-child(4) img { object-fit: contain; }
.equipment-gallery figcaption { position: absolute; right: 8px; bottom: 8px; padding: 5px 8px; color: var(--white); background: rgba(11,51,47,.88); font-size: 11px; font-weight: 800; }
.equipment-list { display: flex; flex-wrap: wrap; gap: 0; margin-top: 17px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.equipment-list span { flex: 1 1 175px; padding: 9px 11px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); font-size: 12px; font-weight: 700; }

.quality-section { padding: 66px 0; background: var(--panel); }
.quality-layout { display: grid; grid-template-columns: minmax(0,.95fr) minmax(450px,1.05fr); gap: 45px; }
.quality-copy h2 { margin: 0 0 21px; font-size: clamp(29px,3.2vw,43px); line-height: 1.24; }
.quality-metrics { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.quality-metrics > div { padding: 15px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.quality-metrics span { display: block; color: var(--muted); font-size: 11px; }
.quality-metrics strong { font-size: 23px; }
.quality-note { margin: 17px 0 0; padding-left: 12px; border-left: 4px solid var(--orange); color: #4d5a56; font-size: 13px; }
.quality-media { display: grid; gap: 10px; }
.quality-media figure { margin: 0; background: var(--white); }
.inspection-photo { position: relative; }
.inspection-photo img { width: 100%; height: 250px; object-fit: cover; }
.inspection-photo figcaption { position: absolute; right: 8px; bottom: 8px; padding: 5px 8px; color: var(--white); background: rgba(11,51,47,.88); font-size: 11px; }
.certificate-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 9px; }
.certificate-row figure { padding: 8px; }
.certificate-row img { width: 100%; height: 155px; object-fit: contain; }
.certificate-row figcaption { padding-top: 5px; border-top: 1px solid var(--line); font-size: 11px; font-weight: 800; text-align: center; }

.faq-section { background: var(--white); }
.faq-layout { display: grid; grid-template-columns: minmax(250px,.58fr) minmax(0,1.42fr); gap: 55px; }
.faq-heading { position: sticky; top: 105px; align-self: start; }
.faq-heading h2 { margin: 0 0 12px; font-size: clamp(29px,3.2vw,42px); line-height: 1.24; }
.faq-heading > p:not(.kicker) { color: var(--muted); }
.faq-heading a { display: inline-block; margin-top: 8px; padding-bottom: 3px; border-bottom: 2px solid var(--orange); font-weight: 900; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 17px 47px 17px 3px; cursor: pointer; font-size: 16px; font-weight: 900; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { position: absolute; top: 13px; right: 5px; content: "+"; color: var(--green); font-size: 25px; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: -3px 0 17px; padding: 0 45px 0 3px; color: var(--muted); }

.contact-section { padding: 63px 0; color: var(--white); background: var(--green-deep); }
.contact-layout { display: grid; grid-template-columns: minmax(0,1.25fr) minmax(320px,.75fr); gap: 58px; align-items: center; }
.contact-layout .kicker { color: var(--lime); }
.contact-layout h2 { max-width: 800px; margin: 0 0 12px; font-size: clamp(31px,3.8vw,50px); line-height: 1.18; }
.contact-layout > div > p:last-child { color: #b8cdc8; }
.contact-card { display: grid; padding: 24px; color: var(--ink); background: var(--paper); border-top: 6px solid var(--lime); }
.contact-card > span { color: var(--green); font-size: 10px; font-weight: 900; letter-spacing: .12em; }
.contact-card > strong { margin-top: 7px; font-size: 20px; }
.contact-card > a:not(.button) { color: var(--green); font-size: 29px; font-weight: 900; line-height: 1.35; }
.contact-card p { margin: 8px 0 16px; color: var(--muted); font-size: 12px; }

.site-footer { padding: 41px 0 22px; color: #c0d0cc; background: #071e1c; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1.4fr .9fr .9fr; gap: 33px; }
.footer-grid img { width: 168px; height: 60px; padding: 5px; object-fit: contain; background: var(--white); }
.footer-grid strong { color: var(--white); font-size: 13px; }
.footer-grid p { margin: 7px 0 0; font-size: 12px; }
.footer-grid a { color: var(--lime); }
.footer-bottom { display: flex; justify-content: space-between; margin-top: 27px; padding-top: 14px; border-top: 1px solid rgba(255,255,255,.14); font-size: 11px; }
.mobile-cta { display: none; }

@media (max-width: 1100px) {
  .site-nav { gap: 15px; }
  .nav-phone small { display: none; }
  .hero-layout { grid-template-columns: minmax(0,1fr) minmax(390px,.8fr); gap: 33px; }
}

@media (max-width: 900px) {
  .container { width: min(100% - 36px,var(--container)); }
  .nav-shell { min-height: 68px; }
  .brand { flex-basis: 150px; }
  .brand img { width: 150px; height: 54px; }
  .nav-phone { margin-left: auto; }
  .nav-toggle { display: grid; width: 42px; height: 42px; place-content: center; gap: 5px; padding: 0; border: 1px solid var(--line); background: transparent; }
  .nav-toggle span:not(.sr-only) { display: block; width: 20px; height: 2px; background: var(--ink); }
  .site-nav { position: fixed; top: 68px; right: 0; bottom: 0; left: 0; display: none; align-content: start; padding: 24px; background: var(--paper); }
  .site-nav.is-open { display: grid; }
  .site-nav a { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 17px; }
  .hero-layout { grid-template-columns: 1fr; min-height: 0; }
  .project-board { max-width: 690px; }
  .intake-layout { grid-template-columns: 1fr; }
  .intake-heading { max-width: 690px; }
  .capability-ledger { grid-template-columns: 1fr 1fr; }
  .gallery-item, .gallery-item:nth-child(1), .gallery-item:nth-child(2) { grid-column: span 6; }
  .gallery-item img, .gallery-item:nth-child(1) img, .gallery-item:nth-child(2) img { height: 255px; }
  .risk-layout { grid-template-columns: 1fr; gap: 24px; }
  .quality-layout { grid-template-columns: 1fr; }
  .quality-media { max-width: 720px; }
  .faq-layout { grid-template-columns: 1fr; gap: 25px; }
  .faq-heading { position: static; }
  .contact-layout { grid-template-columns: 1fr; gap: 28px; }
  .contact-card { max-width: 520px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  .section { padding: 48px 0; }
  .container { width: min(100% - 28px,var(--container)); }
  .nav-phone { display: none; }
  .hero-layout { gap: 30px; padding-top: 35px; padding-bottom: 35px; }
  .hero h1 { font-size: clamp(32px,9.4vw,43px); }
  .hero-actions { display: grid; }
  .project-board { width: 100%; }
  .board-photo img { height: 240px; }
  .board-fields { grid-template-columns: 1fr; }
  .board-footer { grid-template-columns: auto 1fr; }
  .intake-grid { grid-template-columns: 1fr; }
  .ai-layout { grid-template-columns: 1fr; }
  .ai-index { display: flex; align-items: baseline; gap: 12px; padding: 0 0 14px; border-right: 0; border-bottom: 1px solid rgba(23,33,31,.35); }
  .ai-index strong { font-size: 38px; }
  .ai-copy { padding: 18px 0 0; }
  .section-heading { display: grid; gap: 11px; }
  .delivery-track { grid-template-columns: 1fr; }
  .delivery-track li { min-height: 0; }
  .capability-ledger { grid-template-columns: 1fr; }
  .capability-ledger article { min-height: 0; }
  .gallery-item, .gallery-item:nth-child(1), .gallery-item:nth-child(2) { grid-column: 1 / -1; }
  .gallery-item img, .gallery-item:nth-child(1) img, .gallery-item:nth-child(2) img { height: 260px; }
  .evaluation-layout { grid-template-columns: 1fr; gap: 28px; }
  .evaluation-head > span { margin-bottom: 10px; }
  .risk-row { grid-template-columns: 1fr; padding: 10px 0; }
  .risk-row > * { padding: 3px 8px; }
  .risk-header { display: none; }
  .equipment-gallery { grid-template-columns: 1fr; }
  .equipment-gallery img { height: 245px; }
  .quality-metrics { grid-template-columns: 1fr; }
  .certificate-row { grid-template-columns: repeat(3,1fr); }
  .certificate-row img { height: 140px; }
  .contact-card > a:not(.button) { font-size: 25px; }
  .footer-grid { grid-template-columns: 1fr; gap: 23px; }
  .footer-bottom { flex-direction: column; gap: 10px; }
  .site-footer { padding-bottom: 78px; }
  .mobile-cta { position: fixed; z-index: 99; right: 0; bottom: 0; left: 0; display: grid; grid-template-columns: 1fr 1fr; min-height: 54px; box-shadow: 0 -8px 24px rgba(0,0,0,.14); }
  .mobile-cta a { display: grid; place-items: center; color: var(--white); background: var(--green); font-weight: 900; }
  .mobile-cta a:last-child { color: var(--ink); background: var(--lime); }
}

@media (max-width: 440px) {
  .certificate-row { grid-template-columns: 1fr; }
  .certificate-row img { height: 240px; }
}

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