:root {
  --ink: #11272b;
  --ink-soft: #52666a;
  --deep: #063941;
  --deep-2: #0a4c54;
  --teal: #00a39a;
  --teal-bright: #18c6b8;
  --green: #7abf45;
  --ice: #edf7f5;
  --mist: #f5f8f7;
  --white: #ffffff;
  --line: #dbe6e3;
  --shadow: 0 20px 60px rgba(6, 57, 65, 0.13);
  --container: min(1180px, calc(100% - 48px));
  --font: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 82px; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: var(--font); line-height: 1.65; -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
img { display: block; width: 100%; }
svg { width: 1em; height: 1em; stroke-width: 1.8; }
.container { width: var(--container); margin-inline: auto; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 999; transform: translateY(-140%); padding: 10px 16px; color: white; background: var(--deep); }
.skip-link:focus { transform: none; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 100; color: var(--white); transition: background .3s ease, box-shadow .3s ease, color .3s ease; }
.site-header.scrolled, .site-header.menu-active { color: var(--ink); background: rgba(255,255,255,.96); box-shadow: 0 8px 24px rgba(7, 47, 52, .08); backdrop-filter: blur(14px); }
.nav-shell { width: var(--container); height: 82px; margin-inline: auto; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; }
.brand-mark { width: 40px; height: 40px; display: grid; place-items: center; color: var(--white); background: var(--teal); border-radius: 6px; }
.brand-mark svg { width: 24px; height: 24px; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.05; }
.brand-copy strong { font-size: 20px; letter-spacing: 0; }
.brand-copy small { margin-top: 6px; font-size: 8px; font-weight: 700; letter-spacing: 1.4px; opacity: .72; }
.desktop-nav { display: flex; align-items: center; gap: clamp(22px, 2.6vw, 38px); margin-left: auto; }
.desktop-nav a { position: relative; font-size: 14px; font-weight: 600; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -9px; height: 2px; background: var(--teal-bright); transition: right .25s ease; }
.desktop-nav a:hover::after, .desktop-nav a:focus-visible::after { right: 0; }
.nav-actions { display: flex; align-items: center; gap: 15px; }
.nav-phone { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; font-weight: 700; }
.nav-phone svg { color: var(--teal-bright); }
.button { min-height: 48px; padding: 0 24px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; border: 1px solid transparent; border-radius: 4px; cursor: pointer; font-weight: 700; transition: transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-small { min-height: 40px; padding-inline: 18px; font-size: 13px; }
.button-dark { color: var(--white); background: var(--deep); }
.site-header:not(.scrolled):not(.menu-active) .button-dark { color: var(--deep); background: var(--white); }
.button-primary { color: var(--deep); background: var(--teal-bright); }
.button-primary:hover { background: #39d9cc; }
.button-outline { color: var(--deep); border-color: #9bb7b7; background: transparent; }
.button-outline:hover { color: var(--white); border-color: var(--deep); background: var(--deep); }
.icon-button { width: 42px; height: 42px; padding: 0; display: none; place-items: center; color: currentColor; border: 0; background: transparent; cursor: pointer; }
.icon-button svg { width: 25px; height: 25px; }
.mobile-menu { padding: 12px 24px 28px; display: grid; color: var(--ink); background: var(--white); border-top: 1px solid var(--line); box-shadow: 0 20px 40px rgba(0,0,0,.12); }
.mobile-menu[hidden] { display: none; }
.mobile-menu a { padding: 13px 4px; font-size: 16px; font-weight: 700; border-bottom: 1px solid var(--line); }
.mobile-menu a:last-child { margin-top: 12px; padding: 13px 16px; text-align: center; color: var(--white); background: var(--deep); border: 0; }

.hero { min-height: 760px; height: min(850px, 94vh); position: relative; display: flex; align-items: center; overflow: hidden; color: var(--white); background: #063941; }
.hero-media { position: absolute; inset: 0; background: url("assets/hero-upper-treatment-area-v4.jpg") center 48% / cover no-repeat; transform: scale(1.03); animation: hero-drift 16s ease-in-out infinite alternate; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(2, 31, 37, .94) 0%, rgba(4, 43, 50, .80) 43%, rgba(2, 43, 50, .18) 77%), linear-gradient(0deg, rgba(3, 45, 50, .45), transparent 45%); }
.hero-inner { position: relative; z-index: 1; height: 100%; padding-top: 82px; display: flex; align-items: center; justify-content: space-between; }
.hero-content { max-width: 730px; padding-bottom: 54px; }
.eyebrow { margin: 0 0 19px; display: flex; align-items: center; gap: 10px; color: var(--teal); font-size: 13px; font-weight: 800; letter-spacing: 0; }
.eyebrow > span { width: 30px; height: 2px; background: currentColor; }
.eyebrow.light { color: var(--teal-bright); }
.hero h1 { margin: 0; max-width: 720px; font-size: clamp(54px, 6.3vw, 86px); line-height: 1.12; font-weight: 750; letter-spacing: 0; }
.hero-lead { max-width: 640px; margin: 28px 0 34px; color: rgba(255,255,255,.80); font-size: 19px; line-height: 1.85; }
.hero-actions { display: flex; align-items: center; gap: 30px; }
.text-link { display: inline-flex; align-items: center; gap: 8px; color: var(--deep); font-size: 14px; font-weight: 800; }
.text-link svg { transition: transform .2s ease; }
.text-link:hover svg { transform: translateX(4px); }
.light-link { color: var(--white); }
.light-link:hover svg { transform: translateY(4px); }
.hero-note { position: absolute; right: 0; bottom: 86px; width: 310px; padding: 22px 24px; display: flex; gap: 15px; background: rgba(4, 55, 62, .74); border-left: 3px solid var(--teal-bright); backdrop-filter: blur(10px); }
.hero-note > svg { flex: 0 0 auto; width: 25px; height: 25px; color: var(--teal-bright); }
.hero-note div { display: flex; flex-direction: column; gap: 4px; }
.hero-note strong { font-size: 15px; }
.hero-note span { color: rgba(255,255,255,.68); font-size: 12px; }
.hero-index { position: absolute; z-index: 1; left: 36px; bottom: 32px; display: flex; align-items: center; gap: 12px; color: rgba(255,255,255,.54); font-size: 11px; }
.hero-index i { display: block; width: 68px; height: 1px; background: rgba(255,255,255,.34); }

.metrics { position: relative; z-index: 3; color: var(--white); background: var(--deep); }
.metrics-grid { min-height: 170px; display: grid; grid-template-columns: repeat(4, 1fr); }
.metric { padding: 36px 42px; position: relative; display: flex; flex-direction: column; justify-content: center; border-right: 1px solid rgba(255,255,255,.12); }
.metric:first-child { border-left: 1px solid rgba(255,255,255,.12); }
.metric strong { line-height: 1; color: var(--teal-bright); font-size: 42px; font-weight: 700; }
.metric em { margin-left: 4px; font-size: 17px; font-style: normal; }
.metric p { margin: 13px 0 0; color: rgba(255,255,255,.62); font-size: 13px; }

.section { padding: 112px 0; }
.section-heading { margin-bottom: 48px; }
.section-heading.split { display: flex; align-items: flex-end; justify-content: space-between; gap: 60px; }
.section-heading h2, .challenge h2, .about h2, .contact h2 { margin: 0; max-width: 760px; font-size: clamp(34px, 4.2vw, 52px); line-height: 1.22; letter-spacing: 0; }
.section-heading.split > p { max-width: 470px; margin: 0 0 3px; color: var(--ink-soft); font-size: 15px; }
.solutions { background: var(--mist); }
.solution-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.solution-card { min-height: 414px; padding: 31px 28px 26px; position: relative; display: flex; flex-direction: column; background: var(--white); border: 1px solid transparent; border-radius: 6px; transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; }
.solution-card:hover { transform: translateY(-7px); border-color: #c9ded9; box-shadow: var(--shadow); }
.solution-icon { width: 52px; height: 52px; display: grid; place-items: center; color: var(--teal); background: var(--ice); border-radius: 6px; }
.solution-icon svg { width: 27px; height: 27px; }
.card-number { position: absolute; top: 35px; right: 27px; color: #a7b6b4; font: 600 12px/1 Arial, sans-serif; }
.solution-card h3 { margin: 25px 0 12px; font-size: 22px; }
.solution-card p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.solution-card ul { margin: 22px 0 27px; padding: 0; display: flex; flex-wrap: wrap; gap: 7px; list-style: none; }
.solution-card li, .case-tags span { padding: 5px 9px; color: #496260; background: var(--ice); font-size: 11px; border-radius: 3px; }
.solution-card > a { margin-top: auto; display: flex; align-items: center; justify-content: space-between; color: var(--deep); font-size: 13px; font-weight: 800; border-top: 1px solid var(--line); padding-top: 18px; }
.solution-card > a svg { color: var(--teal); transition: transform .2s ease; }
.solution-card:hover > a svg { transform: translateX(5px); }

.challenge { overflow: hidden; background: var(--white); }
.challenge-grid { display: grid; grid-template-columns: minmax(0, .96fr) minmax(0, 1.04fr); align-items: center; gap: clamp(58px, 8vw, 110px); }
.challenge-media { height: 600px; position: relative; }
.challenge-media::before { content: ""; position: absolute; inset: -28px auto auto -28px; width: 58%; height: 66%; background: var(--ice); }
.challenge-media img { height: 100%; position: relative; object-fit: cover; object-position: center; }
.media-stamp { position: absolute; right: -34px; bottom: 38px; width: 190px; padding: 24px 22px; color: var(--white); background: var(--deep); }
.media-stamp span { display: block; color: var(--teal-bright); font: 700 10px/1 Arial, sans-serif; letter-spacing: 1.4px; }
.media-stamp strong { display: block; margin-top: 9px; font-size: 17px; }
.challenge-copy .intro { margin: 24px 0 34px; color: var(--ink-soft); }
.value-list { margin-bottom: 30px; display: grid; }
.value-list > div { padding: 18px 0; display: flex; gap: 18px; border-bottom: 1px solid var(--line); }
.value-list > div > svg { width: 25px; height: 25px; margin-top: 2px; flex: 0 0 auto; color: var(--teal); }
.value-list p { margin: 0; display: flex; flex-direction: column; }
.value-list strong { font-size: 16px; }
.value-list span { margin-top: 3px; color: var(--ink-soft); font-size: 13px; }

.process { position: relative; overflow: hidden; color: var(--white); background: var(--deep); }
.process::before { content: "JT"; position: absolute; right: -30px; bottom: -150px; color: rgba(255,255,255,.025); font: 800 430px/1 Arial, sans-serif; }
.on-dark h2 { color: var(--white); }
.section-heading.on-dark > p { color: rgba(255,255,255,.60); }
.process-track { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); }
.process-track::before { content: ""; position: absolute; top: 50px; left: 12.5%; right: 12.5%; height: 1px; background: rgba(255,255,255,.22); }
.process-step { position: relative; z-index: 1; padding: 0 22px; text-align: center; }
.process-step > span { position: absolute; top: 0; right: 18%; color: rgba(255,255,255,.32); font: 600 11px/1 Arial, sans-serif; }
.process-step > svg { width: 100px; height: 100px; padding: 33px; color: var(--teal-bright); background: var(--deep); border: 1px solid rgba(255,255,255,.28); border-radius: 50%; }
.process-step h3 { margin: 23px 0 8px; font-size: 19px; }
.process-step p { margin: 0; color: rgba(255,255,255,.54); font-size: 13px; }

.industries { background: var(--white); }
.industry-shell { display: grid; grid-template-columns: 250px 1fr; border: 1px solid var(--line); }
.industry-tabs { display: flex; flex-direction: column; background: #f5f8f7; border-right: 1px solid var(--line); }
.industry-tabs button { min-height: 82px; padding: 0 24px; display: flex; align-items: center; gap: 14px; color: #506665; background: transparent; border: 0; border-bottom: 1px solid var(--line); text-align: left; cursor: pointer; transition: color .2s ease, background .2s ease; }
.industry-tabs button svg { width: 20px; height: 20px; }
.industry-tabs button[aria-selected="true"] { color: var(--white); background: var(--deep); }
.industry-tabs button[aria-selected="true"] svg { color: var(--teal-bright); }
.industry-panels { min-height: 430px; }
.industry-panel { height: 100%; padding: 55px 58px; display: grid; grid-template-columns: 1fr 190px; gap: 60px; align-items: end; }
.industry-panel[hidden] { display: none; }
.panel-label { color: var(--teal); font: 700 10px/1 Arial, sans-serif; letter-spacing: 1.5px; }
.industry-panel h3 { max-width: 610px; margin: 13px 0 14px; font-size: 28px; line-height: 1.35; }
.industry-panel p { max-width: 650px; margin: 0; color: var(--ink-soft); font-size: 14px; }
.industry-panel ul { margin: 26px 0 0; padding: 0; display: grid; gap: 11px; list-style: none; }
.industry-panel li { display: flex; align-items: center; gap: 8px; color: #354b4e; font-size: 14px; }
.industry-panel li svg { width: 16px; color: var(--teal); }
.industry-panel dl { margin: 0; border-left: 1px solid var(--line); }
.industry-panel dl > div { padding: 19px 0 19px 28px; border-bottom: 1px solid var(--line); }
.industry-panel dt { color: var(--ink-soft); font-size: 11px; }
.industry-panel dd { margin: 5px 0 0; color: var(--deep); font-size: 23px; font-weight: 750; }

.cases { background: var(--mist); }
.case-feature { display: grid; grid-template-columns: 1.04fr .96fr; background: var(--white); box-shadow: 0 18px 50px rgba(6, 57, 65, .08); }
.case-image { min-height: 500px; position: relative; overflow: hidden; }
.case-image img { height: 100%; object-fit: cover; transition: transform .6s ease; }
.case-feature:hover .case-image img { transform: scale(1.025); }
.case-image > span { position: absolute; left: 0; bottom: 0; padding: 12px 18px; color: var(--white); background: var(--deep); font-size: 12px; }
.case-content { padding: 54px 50px; }
.case-kicker { margin: 0 0 13px; color: var(--teal); font-size: 12px; font-weight: 800; }
.case-content h3 { margin: 0 0 18px; font-size: 28px; line-height: 1.38; }
.case-content > p:not(.case-kicker) { margin: 0; color: var(--ink-soft); font-size: 14px; }
.case-results { margin: 31px 0 26px; display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--line); }
.case-results div { padding: 22px 12px 20px 0; display: flex; flex-direction: column; }
.case-results strong { color: var(--deep); font-size: 27px; line-height: 1; }
.case-results span { margin-top: 8px; color: var(--ink-soft); font-size: 11px; }
.case-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.case-strip { margin-top: 18px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.mini-case { padding: 27px 28px; background: var(--white); border-top: 3px solid transparent; transition: border-color .2s ease, transform .2s ease; }
.mini-case:hover { transform: translateY(-3px); border-color: var(--teal); }
.mini-case > span { color: var(--teal); font-size: 11px; font-weight: 800; }
.mini-case h3 { margin: 10px 0 20px; font-size: 16px; line-height: 1.5; }
.mini-case p { margin: 0; color: var(--ink-soft); font-size: 12px; }
.mini-case p strong { margin-right: 4px; color: var(--deep); font-size: 20px; }

.about { background: var(--white); }
.about-grid { display: grid; grid-template-columns: 1fr .92fr; gap: clamp(60px, 8vw, 110px); align-items: center; }
.about-copy > p:not(.eyebrow) { margin: 25px 0 32px; color: var(--ink-soft); }
.about-points { margin-bottom: 32px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.about-points > div { display: flex; gap: 13px; }
.about-points svg { width: 24px; height: 24px; flex: 0 0 auto; color: var(--teal); }
.about-points span { display: flex; flex-direction: column; }
.about-points strong { font-size: 14px; }
.about-points small { margin-top: 5px; color: var(--ink-soft); font-size: 11px; }
.about-visual { height: 570px; position: relative; }
.about-visual > img { width: calc(100% - 44px); height: 100%; margin-left: 44px; object-fit: cover; object-position: 65% center; }
.about-quote { position: absolute; left: 0; bottom: 34px; width: min(390px, 88%); padding: 27px 30px; color: var(--white); background: var(--deep); }
.about-quote svg { color: var(--teal-bright); }
.about-quote p { margin: 10px 0; font-size: 15px; font-weight: 700; }
.about-quote span { color: rgba(255,255,255,.55); font-size: 11px; }

.contact { padding: 100px 0; position: relative; overflow: hidden; color: var(--white); background: #072f35; }
.contact::after { content: ""; position: absolute; inset: 0 0 0 auto; width: 50%; background: rgba(255,255,255,.025); }
.contact-grid { position: relative; z-index: 1; display: grid; grid-template-columns: .84fr 1.16fr; gap: 95px; align-items: start; }
.contact-copy { padding-top: 26px; }
.contact-copy > p:not(.eyebrow) { margin: 24px 0 40px; color: rgba(255,255,255,.62); }
.contact-list { margin: 0; display: grid; gap: 22px; }
.contact-list div { display: grid; grid-template-columns: 112px 1fr; gap: 18px; align-items: center; }
.contact-list dt { display: flex; align-items: center; gap: 9px; color: rgba(255,255,255,.52); font-size: 12px; }
.contact-list dt svg { color: var(--teal-bright); }
.contact-list dd { margin: 0; font-size: 14px; }
.contact-form { padding: 40px 42px; color: var(--ink); background: var(--white); border-radius: 6px; box-shadow: 0 24px 70px rgba(0,0,0,.2); }
.form-honeypot { width: 1px; height: 1px; position: absolute; left: -10000px; overflow: hidden; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact-form > label, .form-row label { margin-bottom: 17px; display: grid; gap: 7px; color: #32484b; font-size: 12px; font-weight: 700; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; padding: 12px 13px; color: var(--ink); background: #f8faf9; border: 1px solid #dbe4e2; border-radius: 3px; outline: none; transition: border-color .2s ease, box-shadow .2s ease; }
.contact-form input, .contact-form select { height: 46px; }
.contact-form textarea { resize: vertical; min-height: 86px; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(0,163,154,.10); }
.contact-form input::placeholder, .contact-form textarea::placeholder { color: #9aaba8; font-weight: 400; }
.check-label { grid-template-columns: 18px 1fr !important; align-items: start; color: var(--ink-soft) !important; font-weight: 400 !important; }
.check-label input { width: 16px; height: 16px; margin: 2px 0 0; accent-color: var(--teal); }
.button-submit { width: 100%; color: var(--white); background: var(--teal); border: 0; }
.button-submit:hover { background: #008f88; }
.button-submit:disabled { cursor: wait; opacity: .7; }

.site-footer { color: rgba(255,255,255,.66); background: #05272c; }
.footer-main { min-height: 138px; display: flex; align-items: center; gap: 36px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-brand { color: var(--white); }
.footer-main > p { margin-right: auto; font-size: 13px; }
.footer-links { display: flex; gap: 28px; font-size: 12px; }
.footer-links a:hover { color: var(--teal-bright); }
.footer-bottom { min-height: 66px; display: flex; align-items: center; justify-content: space-between; gap: 24px; color: rgba(255,255,255,.36); font-size: 11px; }
.floating-actions { position: fixed; z-index: 80; right: 20px; bottom: 24px; display: grid; gap: 8px; }
.floating-button { width: 44px; height: 44px; padding: 0; display: grid; place-items: center; color: var(--white); background: var(--deep); border: 1px solid rgba(255,255,255,.2); border-radius: 4px; box-shadow: 0 8px 22px rgba(0,0,0,.15); cursor: pointer; }
.floating-button:hover { color: var(--deep); background: var(--teal-bright); }
.back-top { opacity: 0; pointer-events: none; transform: translateY(8px); transition: opacity .2s ease, transform .2s ease; }
.back-top.visible { opacity: 1; pointer-events: auto; transform: none; }
.toast { position: fixed; z-index: 200; left: 50%; bottom: 28px; width: min(410px, calc(100% - 32px)); padding: 16px 20px; display: flex; align-items: center; gap: 11px; color: var(--white); background: #0b5b58; border-radius: 5px; box-shadow: 0 16px 45px rgba(0,0,0,.25); transform: translate(-50%, 140%); opacity: 0; transition: transform .3s ease, opacity .3s ease; }
.toast.show { transform: translate(-50%, 0); opacity: 1; }
.toast svg { color: var(--teal-bright); }
.toast.error { background: #8c342d; }
.toast.error svg { color: #ffd7d2; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@keyframes hero-drift { to { transform: scale(1.07) translate3d(-1%, 1%, 0); } }

@media (max-width: 1080px) {
  .desktop-nav { display: none; }
  .nav-phone { margin-left: auto; }
  .menu-toggle { display: grid; }
  .solution-grid { grid-template-columns: repeat(2, 1fr); }
  .solution-card { min-height: 360px; }
  .challenge-grid, .about-grid { gap: 58px; }
  .industry-panel { padding: 42px; gap: 35px; }
  .case-content { padding: 42px 36px; }
  .contact-grid { gap: 55px; }
}

@media (max-width: 820px) {
  :root { --container: min(100% - 36px, 680px); }
  .section { padding: 84px 0; }
  .hero { min-height: 720px; height: 90svh; }
  .hero-content { padding-bottom: 10px; }
  .hero h1 { font-size: clamp(45px, 11vw, 66px); }
  .hero-note { display: none; }
  .hero-index { left: 18px; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .metric:nth-child(3) { border-left: 1px solid rgba(255,255,255,.12); }
  .metric:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.12); }
  .section-heading.split { align-items: flex-start; flex-direction: column; gap: 19px; }
  .challenge-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .challenge-media { height: 520px; }
  .challenge-copy { max-width: 620px; }
  .process-track { grid-template-columns: repeat(2, 1fr); gap: 50px 0; }
  .process-track::before { display: none; }
  .industry-shell { grid-template-columns: 1fr; }
  .industry-tabs { flex-direction: row; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .industry-tabs button { min-width: 165px; min-height: 68px; border-right: 1px solid var(--line); border-bottom: 0; }
  .industry-panel { grid-template-columns: 1fr; min-height: 470px; align-items: start; }
  .industry-panel dl { display: grid; grid-template-columns: repeat(2, 1fr); border-left: 0; border-top: 1px solid var(--line); }
  .industry-panel dl > div { padding-left: 0; }
  .case-feature { grid-template-columns: 1fr; }
  .case-image { min-height: 430px; }
  .case-strip { grid-template-columns: 1fr; }
  .about-copy { order: 2; }
  .about-visual { order: 1; height: 500px; }
  .contact-grid { gap: 45px; }
}

@media (max-width: 580px) {
  :root { --container: calc(100% - 30px); }
  html { scroll-padding-top: 70px; }
  .nav-shell { height: 70px; gap: 10px; }
  .brand-mark { width: 36px; height: 36px; }
  .brand-copy strong { font-size: 17px; }
  .brand-copy small { font-size: 7px; }
  .nav-phone, .nav-actions > .button { display: none; }
  .nav-actions { margin-left: auto; }
  .hero { min-height: 670px; height: 90svh; }
  .hero-media { background-position: 57% 30%; }
  .hero-overlay { background: linear-gradient(90deg, rgba(2,31,37,.91), rgba(3,44,50,.52)), linear-gradient(0deg, rgba(3,45,50,.55), transparent 50%); }
  .hero-inner { padding-top: 70px; }
  .hero h1 { font-size: 43px; line-height: 1.17; }
  .hero-lead { margin: 23px 0 28px; font-size: 16px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 20px; }
  .hero-actions .button { width: 100%; }
  .hero-index { display: none; }
  .metrics-grid { min-height: 250px; }
  .metric { padding: 25px 20px; }
  .metric strong { font-size: 33px; }
  .metric p { font-size: 11px; }
  .section { padding: 70px 0; }
  .section-heading { margin-bottom: 34px; }
  .section-heading h2, .challenge h2, .about h2, .contact h2 { font-size: 33px; }
  .solution-grid { grid-template-columns: 1fr; }
  .solution-card { min-height: 340px; }
  .challenge-media { height: 420px; margin-right: 12px; }
  .challenge-media::before { inset: -15px auto auto -15px; }
  .media-stamp { right: -12px; bottom: 20px; width: 166px; }
  .process-track { grid-template-columns: 1fr 1fr; gap: 45px 0; }
  .process-step { padding: 0 8px; }
  .process-step > svg { width: 82px; height: 82px; padding: 27px; }
  .process-step h3 { font-size: 16px; }
  .process-step p { font-size: 11px; }
  .industry-tabs button { min-width: 145px; padding-inline: 17px; }
  .industry-panel { min-height: 580px; padding: 34px 25px; gap: 30px; }
  .industry-panel h3 { font-size: 23px; }
  .case-image { min-height: 320px; }
  .case-content { padding: 32px 24px; }
  .case-content h3 { font-size: 23px; }
  .case-results strong { font-size: 22px; }
  .case-results span { font-size: 9px; }
  .about-points { grid-template-columns: 1fr; }
  .about-visual { height: 430px; }
  .about-quote { bottom: 20px; padding: 22px; }
  .contact { padding: 70px 0; }
  .contact::after { display: none; }
  .contact-list div { grid-template-columns: 105px 1fr; gap: 10px; }
  .contact-form { padding: 28px 20px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .footer-main { padding: 35px 0; align-items: flex-start; flex-direction: column; gap: 18px; }
  .footer-main > p { margin: 0; }
  .footer-links { width: 100%; gap: 16px; justify-content: space-between; }
  .footer-bottom { padding: 20px 0; align-items: flex-start; flex-direction: column; gap: 4px; }
  .floating-actions { right: 12px; bottom: 15px; }
}

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