:root {
  --ink: #15283d;
  --ink-deep: #0c1a29;
  --orange: #f25b0b;
  --orange-dark: #d94700;
  --cream: #f6f3ed;
  --paper: #ffffff;
  --mint: #dff4ef;
  --sky: #e9f0f5;
  --line: #d9e0e5;
  --muted: #5f6a73;
  --shadow: 0 24px 60px rgba(10, 26, 41, 0.12);
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "DM Sans", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  transform: translateY(-160%);
  padding: 10px 16px;
  background: #fff;
  color: var(--ink);
  border-radius: 8px;
}
.skip-link:focus { transform: none; }
.container { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.section { padding: 112px 0; }
.section-heading { max-width: 820px; margin-bottom: 54px; }
.section-heading.centered { margin-left: auto; margin-right: auto; text-align: center; }
.section-heading > p:last-child { max-width: 650px; margin: 20px auto 0; color: var(--muted); }
.section-heading h2, .system-copy h2, .calculator-copy h2, .about-copy h2, .faq-intro h2 {
  margin: 10px 0 0;
  font: 400 clamp(38px, 4vw, 60px)/1.03 "DM Serif Display", Georgia, serif;
  letter-spacing: -0.02em;
}
h1 em, h2 em { color: var(--orange); font-weight: inherit; }
.eyebrow {
  margin: 0;
  color: var(--orange-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.eyebrow-light { color: #ff995e; }
.fine-print { margin: 18px 0 0; color: #707a82; font-size: 12px; }
.fine-print-light { color: rgba(255,255,255,.58); }

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  background: rgba(255,255,255,.95);
  border-bottom: 1px solid rgba(21,40,61,.08);
  backdrop-filter: blur(14px);
}
.header-inner { height: 82px; display: flex; align-items: center; gap: 30px; }
.brand { flex: 0 0 auto; }
.brand img { width: 137px; height: auto; }
.desktop-nav { display: flex; align-items: center; gap: 31px; margin-left: auto; }
.desktop-nav a { position: relative; font-size: 14px; font-weight: 600; }
.desktop-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -7px;
  left: 0;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transition: transform .2s ease;
}
.desktop-nav a:hover::after, .desktop-nav a:focus-visible::after { transform: scaleX(1); }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-height: 52px;
  padding: 0 24px;
  border: 0;
  border-radius: 9px;
  color: #fff;
  background: var(--orange);
  box-shadow: 0 12px 30px rgba(242,91,11,.22);
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.button:hover, .button:focus-visible { background: var(--orange-dark); box-shadow: 0 16px 32px rgba(242,91,11,.3); transform: translateY(-2px); }
.button-small { min-height: 46px; padding: 0 19px; font-size: 13px; }
.button-large { min-height: 58px; padding: 0 27px; }
.header-cta { margin-left: 10px; }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 0; background: transparent; }
.menu-toggle span { display: block; width: 24px; height: 2px; margin: 5px 0; background: var(--ink); transition: .2s; }
.mobile-nav { padding: 12px 24px 24px; background: #fff; border-top: 1px solid var(--line); }
.mobile-nav a:not(.button) { display: block; padding: 13px 0; font-weight: 600; border-bottom: 1px solid var(--line); }
.mobile-nav .button { width: 100%; margin-top: 18px; }

.hero { position: relative; min-height: 760px; overflow: hidden; background: var(--ink-deep); }
.hero-media, .hero-shade { position: absolute; inset: 0; }
.hero-media { background: url("assets/hero.webp") center 44% / cover no-repeat; transform: scale(1.015); }
.hero-shade { background: linear-gradient(90deg, rgba(5,13,20,.96) 0%, rgba(5,13,20,.88) 42%, rgba(5,13,20,.22) 78%, rgba(5,13,20,.12) 100%); }
.hero-grid { position: relative; z-index: 2; min-height: 760px; display: grid; grid-template-columns: minmax(0,1.15fr) minmax(330px,.65fr); gap: 70px; align-items: center; }
.hero-copy { padding: 70px 0; color: #fff; }
.hero-copy h1 { max-width: 760px; margin: 16px 0 24px; font: 400 clamp(55px, 5.8vw, 84px)/.98 "DM Serif Display", Georgia, serif; letter-spacing: -.025em; }
.hero-lead { max-width: 680px; margin: 0; color: rgba(255,255,255,.82); font-size: 18px; line-height: 1.72; }
.hero-actions { display: flex; align-items: center; gap: 30px; margin-top: 34px; }
.text-link { color: #fff; font-weight: 700; border-bottom: 1px solid rgba(255,255,255,.45); }
.text-link-dark { color: var(--ink); border-bottom-color: rgba(21,40,61,.3); }
.hero-trust { display: flex; flex-wrap: wrap; gap: 24px; margin: 36px 0 0; padding: 0; list-style: none; color: rgba(255,255,255,.72); font-size: 13px; }
.hero-trust span { display: inline-grid; place-items: center; width: 19px; height: 19px; margin-right: 6px; border-radius: 50%; color: #fff; background: rgba(242,91,11,.95); }
.hero-proof {
  position: relative;
  padding: 32px;
  color: #fff;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.24);
  border-radius: var(--radius);
  backdrop-filter: blur(15px);
  box-shadow: 0 30px 80px rgba(0,0,0,.25);
}
.hero-proof::before { content: ""; position: absolute; inset: 10px; border: 1px solid rgba(255,255,255,.07); border-radius: 15px; pointer-events: none; }
.proof-label { margin: 0 0 5px; color: #ffb48b; font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.proof-number { margin: 0; font: 400 45px/1.1 "DM Serif Display", Georgia, serif; }
.proof-caption { margin: 4px 0 24px; color: rgba(255,255,255,.72); font-size: 14px; }
.proof-bars { padding: 20px 0; border-top: 1px solid rgba(255,255,255,.17); border-bottom: 1px solid rgba(255,255,255,.17); }
.proof-bars div { display: grid; grid-template-columns: 92px 1fr 82px; align-items: center; gap: 10px; margin: 10px 0; font-size: 11px; }
.proof-bars i { position: relative; height: 7px; border-radius: 99px; background: rgba(255,255,255,.17); overflow: hidden; }
.proof-bars i::after { content: ""; position: absolute; inset: 0 auto 0 0; width: var(--bar); border-radius: inherit; background: #fff; }
.proof-bars .is-plus i::after { background: var(--orange); }
.proof-bars strong { font-size: 11px; text-align: right; }
.hero-proof small { display: block; margin-top: 18px; color: rgba(255,255,255,.55); font-size: 10px; line-height: 1.5; }

.trust-strip { border-bottom: 1px solid var(--line); background: #fff; }
.trust-layout { min-height: 132px; display: grid; grid-template-columns: 250px 1fr; gap: 50px; align-items: center; }
.trust-layout > p { margin: 0; padding-right: 35px; border-right: 1px solid var(--line); color: var(--muted); font-size: 13px; line-height: 1.45; }
.trust-layout > p strong { color: var(--ink); font-size: 15px; }
.logo-row { display: grid; grid-template-columns: repeat(4, 1fr); align-items: center; gap: 35px; }
.logo-row img { width: 100%; max-width: 132px; max-height: 53px; object-fit: contain; margin: auto; filter: grayscale(1); opacity: .62; transition: .2s; }
.logo-row img:hover { filter: none; opacity: 1; }

.section-results { background: var(--cream); }
.result-dashboard { display: grid; grid-template-columns: 1.25fr .75fr; overflow: hidden; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); }
.result-main { min-height: 410px; padding: 42px 46px; background: var(--ink); color: #fff; }
.result-kicker { display: flex; justify-content: space-between; color: rgba(255,255,255,.62); font-size: 13px; }
.result-kicker span { color: #ffae80; font-weight: 700; text-transform: uppercase; letter-spacing: .14em; }
.result-total { display: grid; margin: 45px 0 40px; }
.result-total span { color: rgba(255,255,255,.72); }
.result-total strong { margin: 3px 0; font: 400 clamp(52px,7vw,82px)/1 "DM Serif Display", Georgia, serif; color: #fff; }
.result-total small { color: rgba(255,255,255,.55); }
.result-meter { max-width: 600px; }
.meter-copy { display: flex; justify-content: space-between; margin-bottom: 10px; font-size: 12px; }
.meter-copy strong { color: #ff9a62; }
.meter-track { height: 10px; border-radius: 20px; background: rgba(255,255,255,.25); overflow: hidden; }
.meter-track i { display: block; width: 60%; height: 100%; margin-left: auto; background: var(--orange); border-radius: inherit; }
.meter-labels { display: flex; justify-content: space-between; margin-top: 10px; font-size: 13px; font-weight: 700; }
.meter-labels small { color: rgba(255,255,255,.5); font-weight: 400; }
.result-side { display: grid; grid-template-rows: repeat(3,1fr); }
.result-side article { display: grid; align-content: center; padding: 26px 36px; border-bottom: 1px solid var(--line); }
.result-side article:last-child { border: 0; }
.result-side span, .result-side small { color: var(--muted); font-size: 12px; }
.result-side strong { margin: 5px 0; font: 400 28px/1.1 "DM Serif Display", Georgia, serif; }

.calculator-section { background: #fff; }
.calculator-grid { display: grid; grid-template-columns: .55fr 1.45fr; gap: 64px; align-items: start; }
.calculator-copy > p:not(.eyebrow) { margin: 25px 0; color: var(--muted); }
.calculator-card { padding: 42px; background: var(--cream); border: 1px solid #ece8df; border-radius: var(--radius); }
.slider-label { display: flex; align-items: center; justify-content: space-between; }
.slider-label label { font-weight: 700; }
.slider-label output { min-width: 70px; font: 400 38px/1 "DM Serif Display", Georgia, serif; text-align: right; }
input[type="range"] { width: 100%; height: 8px; margin: 28px 0 4px; appearance: none; border-radius: 20px; background: linear-gradient(to right, var(--orange) 0%, var(--orange) 27%, #d9dde0 27%, #d9dde0 100%); cursor: pointer; }
input[type="range"]::-webkit-slider-thumb { width: 25px; height: 25px; appearance: none; border: 5px solid #fff; border-radius: 50%; background: var(--orange); box-shadow: 0 2px 8px rgba(21,40,61,.25); }
input[type="range"]::-moz-range-thumb { width: 16px; height: 16px; border: 5px solid #fff; border-radius: 50%; background: var(--orange); box-shadow: 0 2px 8px rgba(21,40,61,.25); }
.range-extremes { display: flex; justify-content: space-between; color: #879199; font-size: 11px; }
.model-assumptions { margin-top: 24px; border-top: 1px solid #d8d5ce; border-bottom: 1px solid #d8d5ce; }
.model-assumptions summary { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; font-weight: 700; cursor: pointer; }
.model-assumptions summary span { color: var(--orange-dark); font-size: 11px; font-weight: 600; }
.assumption-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; padding: 0 0 18px; }
.assumption-grid label { display: grid; gap: 5px; padding: 12px 14px; color: var(--muted); background: #fff; border: 1px solid #e3e0d9; border-radius: 9px; font-size: 11px; }
.assumption-grid label > span { display: flex; align-items: center; gap: 6px; color: var(--ink); font-weight: 700; }
.assumption-grid input { width: 100%; min-width: 0; padding: 4px 0; color: var(--ink); background: transparent; border: 0; border-bottom: 1px solid #cdd2d5; font-size: 16px; font-weight: 700; outline: none; }
.assumption-grid input:focus { border-bottom-color: var(--orange); }
.calculation-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 30px; }
.calculation-grid > div { display: grid; min-height: 138px; align-content: center; padding: 22px; border-radius: 14px; }
.calculation-grid span, .calculation-grid small { font-size: 12px; }
.calculation-grid strong { margin: 5px 0; font: 400 clamp(27px,3vw,38px)/1 "DM Serif Display", Georgia, serif; }
.cost-before { color: #8c2440; background: #fbe2e7; }
.cost-after { color: #08776c; background: #d9f2ee; }
.calculation-grid .saving { grid-column: 1/-1; min-height: 160px; color: #fff; background: var(--ink); }
.saving strong { font-size: clamp(42px,5vw,58px); }
.return-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 12px; }
.return-grid article { display: grid; gap: 3px; padding: 18px 20px; background: #fff; border: 1px solid #e3e0d9; border-radius: 11px; }
.return-grid span { color: var(--muted); font-size: 11px; }
.return-grid strong { font: 400 23px/1.1 "DM Serif Display", Georgia, serif; }
.energy-breakdown { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; margin-top: 12px; }
.energy-breakdown span { display: grid; padding: 12px; color: var(--muted); background: rgba(255,255,255,.65); border-radius: 9px; font-size: 10px; }
.energy-breakdown strong { color: var(--ink); font-size: 12px; }
.calculator-note { margin: 16px 0 0; color: #737d85; font-size: 11px; }
.model-sources { margin-top: 20px; padding: 20px; background: #ebe7df; border-radius: 12px; }
.model-sources > strong { font-size: 12px; }
.model-sources p { margin: 8px 0; color: var(--muted); font-size: 10px; line-height: 1.55; }
.model-sources > div { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 12px; }
.model-sources a { color: var(--orange-dark); font-size: 10px; font-weight: 700; text-decoration: underline; }

.system-section { background: var(--cream); }
.system-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.system-visual { position: relative; }
.system-visual img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); }
.visual-badge { position: absolute; right: -18px; bottom: 28px; padding: 13px 18px; color: #fff; background: var(--ink); border-radius: 7px; font-size: 12px; font-weight: 700; box-shadow: 0 12px 25px rgba(21,40,61,.2); }
.system-copy > p:not(.eyebrow) { color: var(--muted); }
.feature-list { margin: 35px 0 0; padding: 0; list-style: none; }
.feature-list li { display: grid; grid-template-columns: 40px 1fr; gap: 20px; padding: 20px 0; border-top: 1px solid #d7d5cf; }
.feature-list li > span { color: var(--orange); font: 400 19px "DM Serif Display", Georgia, serif; }
.feature-list strong { font-size: 17px; }
.feature-list p { margin: 3px 0 0; color: var(--muted); font-size: 14px; }

.financing-section { color: #fff; background: var(--ink-deep); }
.financing-section .section-heading > p:last-child { color: rgba(255,255,255,.62); }
.finance-flow { display: grid; grid-template-columns: repeat(7, auto); align-items: center; }
.finance-flow article { width: 245px; min-height: 245px; padding: 28px; border: 1px solid rgba(255,255,255,.15); border-radius: 16px; background: rgba(255,255,255,.05); }
.finance-flow > i { width: 43px; color: #ff9a62; font-style: normal; font-size: 28px; text-align: center; }
.finance-flow article > span { display: grid; place-items: center; width: 35px; height: 35px; margin-bottom: 38px; border-radius: 50%; color: #fff; background: rgba(255,255,255,.1); font-size: 11px; }
.finance-flow small { display: block; color: rgba(255,255,255,.5); }
.finance-flow strong { display: block; margin: 5px 0; font: 400 24px/1.1 "DM Serif Display", Georgia, serif; }
.finance-flow p { margin: 10px 0 0; color: rgba(255,255,255,.62); font-size: 13px; }
.finance-flow .finance-result { border-color: rgba(242,91,11,.85); background: var(--orange); }
.finance-flow .finance-result > span { background: rgba(0,0,0,.12); }
.finance-flow .finance-result small, .finance-flow .finance-result p { color: rgba(255,255,255,.8); }

.process-section { background: #fff; }
.split-heading { max-width: none; display: grid; grid-template-columns: 1fr 1fr; gap: 100px; align-items: end; }
.split-heading h2 { margin-bottom: 0; }
.split-heading > p { max-width: 480px; margin: 0 0 5px; color: var(--muted); }
.process-grid { display: grid; grid-template-columns: repeat(4,1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.process-grid article { position: relative; min-height: 310px; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.process-grid article > span { color: #9ca4a9; font-size: 11px; }
.process-icon { display: grid; place-items: center; width: 54px; height: 54px; margin: 50px 0 26px; border-radius: 14px; color: #fff; background: var(--orange); font-size: 23px; }
.process-grid h3 { margin: 0 0 8px; font: 400 24px "DM Serif Display", Georgia, serif; }
.process-grid p { margin: 0; color: var(--muted); font-size: 13px; }

.about-section { background: var(--cream); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 75px; align-items: center; }
.about-photo { position: relative; }
.about-photo img { width: 100%; aspect-ratio: 4/5; border-radius: var(--radius); object-fit: cover; box-shadow: var(--shadow); }
.about-photo > div { position: absolute; right: 25px; bottom: 25px; left: 25px; display: grid; padding: 18px 20px; color: #fff; background: rgba(12,26,41,.88); border-radius: 10px; backdrop-filter: blur(10px); }
.about-photo span { color: rgba(255,255,255,.65); font-size: 11px; }
.about-copy > p:not(.eyebrow) { color: var(--muted); }
.credential-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 30px; }
.credential-grid div { display: grid; padding: 21px; background: #fff; border: 1px solid #e8e4dc; border-radius: 12px; }
.credential-grid strong { font: 400 25px "DM Serif Display", Georgia, serif; }
.credential-grid span { color: var(--muted); font-size: 11px; line-height: 1.45; }

.faq-section { background: #fff; }
.faq-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 80px; }
.faq-intro { position: sticky; top: 120px; align-self: start; }
.faq-intro > p:not(.eyebrow) { color: var(--muted); }
.accordion details { border-top: 1px solid var(--line); }
.accordion details:last-child { border-bottom: 1px solid var(--line); }
.accordion summary { display: flex; align-items: center; justify-content: space-between; min-height: 83px; font-weight: 700; cursor: pointer; list-style: none; }
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary span { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--cream); font-size: 20px; transition: transform .2s; }
.accordion details[open] summary span { transform: rotate(45deg); color: #fff; background: var(--orange); }
.accordion details p { max-width: 680px; margin: -6px 60px 28px 0; color: var(--muted); }

.contact-section { padding: 110px 0; color: #fff; background: var(--ink-deep); }
.contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; align-items: start; }
.contact-copy h2 { margin: 12px 0 20px; font: 400 clamp(43px,5vw,68px)/1 "DM Serif Display", Georgia, serif; }
.contact-copy > p:not(.eyebrow) { color: rgba(255,255,255,.67); }
.contact-copy ul { margin: 30px 0; padding: 0; list-style: none; }
.contact-copy li { padding: 12px 0; color: rgba(255,255,255,.78); border-top: 1px solid rgba(255,255,255,.12); }
.contact-copy li span { display: inline-grid; place-items: center; width: 28px; height: 28px; margin-right: 12px; border: 1px solid rgba(255,255,255,.25); border-radius: 50%; font-size: 11px; }
.direct-contact { display: grid; margin-top: 35px; }
.direct-contact a { width: fit-content; color: #ff995e; font-weight: 700; }
.contact-form { padding: 42px; color: var(--ink); background: #fff; border-radius: var(--radius); box-shadow: 0 30px 80px rgba(0,0,0,.25); }
.form-heading { display: flex; align-items: center; gap: 13px; margin-bottom: 27px; }
.form-heading > span { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; color: #fff; background: var(--orange); font-size: 12px; }
.form-heading div { display: grid; }
.form-heading small { color: var(--muted); font-size: 11px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.contact-form label { display: grid; margin-bottom: 13px; font-size: 12px; font-weight: 700; }
.contact-form input:not([type="checkbox"]), .contact-form select, .contact-form textarea { width: 100%; margin-top: 7px; padding: 13px 14px; color: var(--ink); background: #fafafa; border: 1px solid #d9dde0; border-radius: 8px; outline: none; resize: vertical; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(242,91,11,.1); }
.contact-form .consent { grid-template-columns: 18px 1fr; gap: 10px; align-items: start; color: var(--muted); font-size: 10px; font-weight: 400; }
.consent input { margin: 4px 0 0; accent-color: var(--orange); }
.consent a { text-decoration: underline; }
.form-submit { width: 100%; margin-top: 6px; }
.form-status { min-height: 20px; margin: 10px 0 0; color: #08776c; font-size: 12px; font-weight: 700; text-align: center; }

.site-footer { padding: 65px 0 25px; background: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.3fr .7fr .8fr; gap: 70px; }
.footer-grid img { width: 135px; }
.footer-grid p { max-width: 330px; color: var(--muted); font-size: 13px; }
.footer-grid nav, .footer-contact { display: grid; align-content: start; gap: 7px; font-size: 13px; }
.footer-grid nav a, .footer-contact a { width: fit-content; }
.footer-grid nav a:hover, .footer-contact a:hover { color: var(--orange); }
.footer-bottom { display: flex; justify-content: space-between; margin-top: 55px; padding-top: 20px; color: #8a939a; border-top: 1px solid var(--line); font-size: 11px; }
.mobile-sticky-cta { display: none; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 1100px) {
  .desktop-nav { gap: 18px; }
  .header-cta { display: none; }
  .hero-grid { grid-template-columns: 1fr .62fr; gap: 35px; }
  .finance-flow { grid-template-columns: 1fr 24px 1fr; gap: 13px; }
  .finance-flow article { width: auto; }
  .finance-flow > i:nth-of-type(2) { display: none; }
  .finance-flow article:nth-of-type(3) { grid-column: 1; }
  .finance-flow > i:nth-of-type(3) { grid-column: 2; }
  .finance-flow article:nth-of-type(4) { grid-column: 3; }
}

@media (max-width: 820px) {
  .container { width: min(100% - 32px, 680px); }
  .section { padding: 82px 0; }
  .desktop-nav { display: none; }
  .menu-toggle { display: block; margin-left: auto; cursor: pointer; }
  .menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .hero, .hero-grid { min-height: auto; }
  .hero-media { background-position: 62% center; }
  .hero-shade { background: linear-gradient(90deg, rgba(5,13,20,.96), rgba(5,13,20,.62)); }
  .hero-grid { display: block; }
  .hero-copy { padding: 76px 0 35px; }
  .hero-copy h1 { font-size: clamp(48px,11vw,70px); }
  .hero-proof { max-width: 520px; margin: 0 0 70px; }
  .trust-layout { grid-template-columns: 1fr; gap: 20px; padding: 28px 0; }
  .trust-layout > p { padding: 0; border: 0; text-align: center; }
  .result-dashboard, .calculator-grid, .system-grid, .about-grid, .faq-grid, .contact-grid { grid-template-columns: 1fr; }
  .calculator-grid, .system-grid, .about-grid, .faq-grid, .contact-grid { gap: 45px; }
  .system-copy { grid-row: 1; }
  .split-heading { grid-template-columns: 1fr; gap: 24px; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .faq-intro { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > div:first-child { grid-column: 1/-1; }
}

@media (max-width: 560px) {
  body { font-size: 15px; padding-bottom: 70px; }
  html { scroll-padding-top: 70px; }
  .container { width: calc(100% - 32px); }
  .header-inner { height: 70px; }
  .brand img { width: 125px; }
  .section { padding: 68px 0; }
  .section-heading { margin-bottom: 35px; }
  .section-heading h2, .system-copy h2, .calculator-copy h2, .about-copy h2, .faq-intro h2 { font-size: 38px; }
  .hero-media { background-position: 66% center; }
  .hero-shade { background: linear-gradient(180deg, rgba(5,13,20,.6) 0%, rgba(5,13,20,.94) 45%, rgba(5,13,20,.99) 100%); }
  .hero-copy { padding: 58px 0 30px; }
  .hero-copy h1 { margin: 13px 0 18px; font-size: 47px; }
  .hero-lead { font-size: 16px; line-height: 1.62; }
  .hero-actions { display: grid; gap: 17px; margin-top: 26px; }
  .hero-actions .button { width: 100%; }
  .hero-actions .text-link { width: fit-content; }
  .hero-trust { gap: 10px 17px; margin-top: 25px; }
  .hero-proof { padding: 25px 22px; margin-bottom: 45px; }
  .proof-number { font-size: 39px; }
  .proof-bars div { grid-template-columns: 82px 1fr 75px; }
  .logo-row { grid-template-columns: 1fr 1fr; gap: 25px; }
  .result-dashboard { border-radius: 16px; }
  .result-main { min-height: 0; padding: 30px 24px; }
  .result-total { margin: 35px 0; }
  .result-total strong { font-size: 54px; }
  .result-side article { padding: 23px 25px; }
  .calculator-card { padding: 26px 20px; }
  .calculation-grid { grid-template-columns: 1fr; }
  .calculation-grid .saving { grid-column: 1; }
  .assumption-grid, .return-grid { grid-template-columns: 1fr; }
  .energy-breakdown { grid-template-columns: 1fr; }
  .visual-badge { right: 14px; bottom: 14px; left: 14px; text-align: center; }
  .feature-list li { gap: 13px; }
  .finance-flow { grid-template-columns: 1fr; }
  .finance-flow article { min-height: 0; }
  .finance-flow article > span { margin-bottom: 20px; }
  .finance-flow > i { width: auto; transform: rotate(90deg); }
  .finance-flow > i:nth-of-type(2) { display: block; }
  .finance-flow article:nth-of-type(3), .finance-flow > i:nth-of-type(3), .finance-flow article:nth-of-type(4) { grid-column: auto; }
  .process-grid { grid-template-columns: 1fr; }
  .process-grid article { min-height: 250px; }
  .process-icon { margin-top: 30px; }
  .credential-grid { grid-template-columns: 1fr; }
  .contact-section { padding: 72px 0; }
  .contact-copy h2 { font-size: 48px; }
  .contact-form { padding: 27px 20px; border-radius: 16px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .accordion summary { min-height: 74px; padding-right: 5px; }
  .accordion summary span { flex: 0 0 32px; margin-left: 15px; }
  .accordion details p { margin-right: 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-grid > div:first-child { grid-column: auto; }
  .footer-bottom { display: grid; gap: 5px; }
  .mobile-sticky-cta { position: fixed; z-index: 45; right: 10px; bottom: 10px; left: 10px; align-items: center; justify-content: space-between; min-height: 54px; padding: 0 22px; color: #fff; background: var(--orange); border-radius: 9px; box-shadow: 0 12px 35px rgba(21,40,61,.3); font-weight: 700; }
  .mobile-sticky-cta.is-visible { display: flex; }
}