:root{--p-navy:#053e68;--p-deep:#022f50;--p-blue:#0a8fd5;--p-cyan:#22b6bd;--p-sky:#f2f9fc;--p-line:#d3e6ef;--p-text:#536f81;--p-green:#159873;--p-shadow:0 16px 38px rgba(4,63,105,.08)}
.petroleum-page{background:#fff;color:var(--p-text)}.petroleum-page .shell{width:min(1180px,calc(100% - 44px));margin:auto}.petroleum-page h1,.petroleum-page h2,.petroleum-page h3{color:var(--p-navy)}.petroleum-page .eyebrow{font-size:11px;font-weight:900;letter-spacing:.18em;text-transform:uppercase;margin:0 0 10px;color:#c5edf5}.petroleum-page .eyebrow.blue{color:#0788ca}
.petroleum-hero{position:relative;min-height:760px;overflow:hidden;background:#053e68;color:#fff}.petroleum-hero-media,.petroleum-hero-media img{position:absolute;inset:0;width:100%;height:100%}.petroleum-hero-media img{object-fit:cover}.petroleum-hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(1,35,61,.80),rgba(1,43,72,.30) 58%,rgba(1,43,72,.05))}.petroleum-hero-shell{position:relative;z-index:2;width:min(1180px,calc(100% - 44px));min-height:760px;margin:auto;display:flex;flex-direction:column;justify-content:center;align-items:flex-start}.petroleum-hero h1{max-width:780px;color:#fff;font-size:58px;line-height:1.02;letter-spacing:-1.4px;margin:0 0 18px}.petroleum-hero p:not(.eyebrow){max-width:720px;margin:0;color:#e7f3f8;font-size:18px;line-height:1.7}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border-radius:9px;font-weight:850;text-decoration:none}.btn.primary{background:#0a91d8;color:#fff}.btn.outline{border:1px solid rgba(255,255,255,.62);color:#fff;background:rgba(255,255,255,.06)}.btn.light{background:#fff;color:#0877ad}
.petroleum-intro{padding:64px 0}.intro-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:60px}.petroleum-intro h2,.heading h2,.aqueous h2,.ecocid h2,.field-experience h2,.environment h2,.cta h2{font-size:38px;line-height:1.1;margin:0}.intro-grid>div:last-child>p,.heading>p:last-child{font-size:16px;line-height:1.78;margin:0}.tags,.eco-pills,.experience-list{display:flex;gap:9px;flex-wrap:wrap;margin-top:20px}.tags span,.eco-pills span,.experience-list span{padding:8px 11px;border-radius:999px;background:#eaf7fc;border:1px solid #cee6f1;color:#0874a8;font-size:11px;font-weight:850}
.applications{padding:58px 0;background:#f3f9fc}.heading{max-width:850px;margin-bottom:26px}.heading h2{margin-bottom:10px}.application-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.application-grid article,.station-grid article{background:#fff;border:1px solid var(--p-line);border-radius:17px;padding:22px;box-shadow:var(--p-shadow)}.application-grid span,.ecocid-points span{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:#e6f5fb;color:#0789ce;font-size:11px;font-weight:900}.application-grid h3,.station-grid h3{font-size:18px;margin:13px 0 8px}.application-grid p,.station-grid p{font-size:13px;line-height:1.65;margin:0}
.aqueous{padding:66px 0}.aqueous-grid,.ecocid-grid,.experience-grid,.environment-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}.photo{overflow:hidden;border-radius:20px;background:#edf5f8;box-shadow:var(--p-shadow)}.photo img{display:block;width:100%;height:auto}.aqueous p,.ecocid p,.field-experience p,.environment p{line-height:1.75}.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:22px}.feature-list div{padding:15px;border:1px solid var(--p-line);border-radius:12px;background:#fbfdff}.feature-list strong{display:block;color:#063f70}.feature-list span{display:block;font-size:11px;line-height:1.5;margin-top:4px}
.service-stations{padding:62px 0;background:#eef7fa}.station-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.ecocid{padding:68px 0;background:#0b6f90;color:#fff}.ecocid h2{color:#fff}.ecocid p{color:#e6f5f8}.ecocid-points{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:22px}.ecocid-points div{position:relative;padding:13px 13px 13px 48px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:12px}.ecocid-points span{position:absolute;left:10px;top:10px;background:#1bb28c;color:#fff}.ecocid-points strong{display:block;color:#fff}.ecocid-points p{margin:3px 0 0;font-size:11px;line-height:1.5}.ecocid .photo{background:#fff;padding:12px}.text-link{display:inline-flex;margin-top:18px;color:#fff;font-weight:850;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.45)}
.acid-research{padding:60px 0;background:#f7fbfd}.research-note{max-width:850px;padding:18px 20px;border-left:5px solid #19b6bd;background:#eaf7fb;border-radius:12px}.research-note strong{display:block;color:#064b7f;margin-bottom:5px}.research-note p{margin:0;font-size:13px;line-height:1.65}
.field-experience{padding:66px 0}.experience-list span{background:#edf7fa;color:#075f88}
.portfolio{padding:64px 0;background:#f4fafd}.portfolio-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.portfolio-grid a{display:block;background:#fff;border:1px solid var(--p-line);border-radius:17px;padding:21px;text-decoration:none;box-shadow:var(--p-shadow);transition:.2s}.portfolio-grid a:hover{transform:translateY(-2px);border-color:#9dd5ee}.portfolio-grid span{display:block;color:#078bd0;font-size:10px;font-weight:900;letter-spacing:.11em;text-transform:uppercase}.portfolio-grid h3{font-size:21px;margin:8px 0}.portfolio-grid p{font-size:13px;line-height:1.6;margin:0 0 13px}.portfolio-grid b{color:#087db8;font-size:11px}
.environment{padding:66px 0;background:#eef9f5}.eco-pills span{background:#e3f7ef;border-color:#c8eadf;color:#16815f}
.process-note{padding:25px 0}.process-note .shell{border:1px solid #cfe7f1;border-left:5px solid #18b8be;border-radius:14px;padding:18px 20px;background:#f6fbfd}.process-note strong{display:block;color:#063f70;margin-bottom:5px}.process-note p{margin:0;font-size:12px;line-height:1.65}
.cta{padding:48px 0;background:#0a8fd3;color:#fff}.cta-grid{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center}.cta h2{color:#fff;font-size:32px;max-width:850px}.compact-footer .footer-main{grid-template-columns:1.5fr repeat(3,1fr)}
@media(max-width:1050px){.intro-grid,.aqueous-grid,.ecocid-grid,.experience-grid,.environment-grid{grid-template-columns:1fr}.application-grid{grid-template-columns:1fr 1fr}.portfolio-grid{grid-template-columns:1fr 1fr}}
@media(max-width:700px){.petroleum-hero{min-height:700px}.petroleum-hero-overlay{background:linear-gradient(180deg,rgba(3,50,84,.62),rgba(3,50,84,.74) 42%,rgba(3,50,84,.90))}.petroleum-hero-shell{min-height:700px;padding:50px 0 40px;justify-content:flex-start}.petroleum-hero h1{font-size:39px}.petroleum-hero p:not(.eyebrow){font-size:16px}.petroleum-page .shell,.petroleum-hero-shell{width:min(100% - 30px,720px)}.petroleum-intro,.applications,.aqueous,.service-stations,.ecocid,.acid-research,.field-experience,.portfolio,.environment{padding:42px 0}.intro-grid{gap:17px}.petroleum-intro h2,.heading h2,.aqueous h2,.ecocid h2,.field-experience h2,.environment h2,.cta h2{font-size:29px}.application-grid,.station-grid,.feature-list,.ecocid-points,.portfolio-grid{grid-template-columns:1fr}.cta-grid{grid-template-columns:1fr}.compact-footer .footer-main{grid-template-columns:1fr 1fr}.compact-footer .footer-brand{grid-column:1/-1}}