:root {
  --navy: #071d49;
  --navy-2: #0e2d5b;
  --green: #61a631;
  --green-2: #27856f;
  --red: #b7261f;
  --amber: #b0844e;
  --ink: #16202c;
  --muted: #647083;
  --line: #dce3ea;
  --soft: #f5f7f8;
  --white: #ffffff;
  --shadow: 0 18px 45px rgba(13, 32, 56, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Inter", Arial, Helvetica, sans-serif;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 76px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(220, 227, 234, 0.78);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand img {
  width: 154px;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 16px;
  color: #233044;
  font-size: 13px;
  font-weight: 700;
}

.site-nav a {
  padding: 8px 0;
}

.nav-cta,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
}

.nav-cta {
  color: var(--white);
  background: var(--navy);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background: var(--navy);
}

.hero {
  position: relative;
  display: grid;
  align-items: end;
  min-height: 100svh;
  padding: 118px clamp(18px, 5vw, 72px) 28px;
  overflow: hidden;
  color: var(--white);
}

.hero-bg,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(3, 17, 40, 0.9) 0%, rgba(3, 17, 40, 0.68) 37%, rgba(3, 17, 40, 0.18) 76%),
    linear-gradient(0deg, rgba(3, 17, 40, 0.62), rgba(3, 17, 40, 0.02) 48%);
}

.hero-content {
  position: relative;
  width: min(780px, 100%);
  padding-bottom: clamp(44px, 10vh, 104px);
}

.eyebrow {
  margin: 0 0 13px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.35;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #b8f2a2;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 18px;
  font-size: clamp(42px, 6vw, 82px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  color: var(--navy);
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.04;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  color: var(--navy);
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: 0;
}

p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
}

.hero-lead {
  max-width: 660px;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn.primary {
  color: var(--white);
  background: var(--green);
  border-color: var(--green);
}

.btn.ghost {
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.48);
}

.hero-panel {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  width: min(920px, 100%);
  margin-left: auto;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.13);
  backdrop-filter: blur(18px);
}

.hero-panel div {
  padding: 18px;
  background: rgba(4, 20, 43, 0.42);
}

.hero-panel strong {
  display: block;
  color: var(--white);
  font-size: 20px;
  line-height: 1.2;
}

.hero-panel span {
  display: block;
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 13px;
  line-height: 1.35;
}

.section {
  padding: clamp(68px, 8vw, 112px) clamp(18px, 5vw, 72px);
}

.intro-band {
  background: var(--navy);
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 1fr);
  gap: clamp(28px, 5vw, 76px);
  align-items: start;
  max-width: 1180px;
  margin: 0 auto;
}

.intro-band h2 {
  color: var(--white);
}

.intro-band p:not(.eyebrow) {
  color: #d8e2ea;
  font-size: 18px;
}

.section-heading {
  max-width: 900px;
  margin: 0 auto 36px;
}

.section-heading.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.55fr);
  gap: 32px;
  max-width: 1180px;
  align-items: end;
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 1180px;
  margin: 0 auto;
}

.solution-card,
.model-card,
.work-card,
.management-grid article,
.faq-grid details,
.timeline article,
.diagnosis-tool,
.contact-form {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.solution-card {
  min-height: 300px;
  padding: 24px;
}

.solution-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-bottom: 54px;
  border-radius: 8px;
  color: var(--white);
  background: var(--navy);
  font-size: 13px;
  font-weight: 800;
}

.solution-card:nth-child(2) span {
  background: var(--green-2);
}

.solution-card:nth-child(3) span {
  background: var(--amber);
}

.solution-card:nth-child(4) span {
  background: var(--red);
}

.commercial-model {
  background: #ffffff;
}

.model-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.9fr 0.9fr;
  gap: 16px;
  max-width: 1180px;
  margin: 0 auto;
}

.model-card {
  min-height: 280px;
  padding: 26px;
}

.model-card.dark {
  color: var(--white);
  background: var(--navy);
  border-color: var(--navy);
}

.model-card.dark h3,
.model-card.dark p {
  color: var(--white);
}

.model-card.dark p {
  color: #d8e2ea;
}

.model-card a {
  display: inline-flex;
  margin-top: 18px;
  color: #b8f2a2;
  font-weight: 800;
}

.sectors {
  background: var(--navy);
}

.sectors h2 {
  color: var(--white);
}

.sector-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  max-width: 1180px;
  margin: 0 auto;
}

.sector-grid span {
  display: flex;
  align-items: center;
  min-height: 74px;
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  color: var(--white);
  background: rgba(255, 255, 255, 0.06);
  font-weight: 800;
}

.works {
  background: var(--soft);
}

.work-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr 0.85fr;
  gap: 16px;
  max-width: 1180px;
  margin: 0 auto;
}

.work-feature {
  display: grid;
  grid-row: span 2;
  overflow: hidden;
  border-radius: 8px;
  background: var(--navy);
  box-shadow: var(--shadow);
}

.work-feature img {
  width: 100%;
  height: 430px;
  object-fit: cover;
}

.work-feature div {
  padding: 26px;
}

.work-feature h3 {
  color: var(--white);
  font-size: 28px;
}

.work-feature p:not(.eyebrow) {
  color: #d8e2ea;
}

.work-card {
  overflow: hidden;
  min-height: 100%;
}

.work-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.work-card h3,
.work-card p {
  padding-inline: 18px;
}

.work-card h3 {
  margin-top: 18px;
}

.work-card p {
  margin-bottom: 18px;
}

.method {
  background: #ffffff;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 1180px;
  margin: 0 auto;
}

.timeline article {
  position: relative;
  min-height: 270px;
  padding: 24px;
  overflow: hidden;
}

.timeline span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 42px;
  border-radius: 50%;
  color: var(--white);
  background: var(--green);
  font-weight: 800;
}

.timeline article::after {
  content: "";
  position: absolute;
  top: 43px;
  left: 76px;
  right: 22px;
  height: 2px;
  background: var(--line);
}

.energy-management {
  background: var(--navy);
}

.energy-management h2 {
  color: var(--white);
}

.energy-management .section-heading p:not(.eyebrow) {
  color: #d8e2ea;
}

.management-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 1180px;
  margin: 0 auto;
}

.management-grid article {
  min-height: 240px;
  padding: 26px;
  background: #ffffff;
}

.management-grid strong {
  display: inline-flex;
  margin-bottom: 44px;
  color: var(--green-2);
  font-size: 13px;
}

.diagnosis {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(340px, 1fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
  background: var(--soft);
}

.diagnosis-copy {
  max-width: 540px;
  margin-left: auto;
}

.diagnosis-tool {
  max-width: 650px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.option-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 18px;
}

.option {
  min-height: 62px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--navy);
  background: var(--white);
  cursor: pointer;
  font-weight: 800;
  text-align: left;
}

.option.is-active {
  color: var(--white);
  background: var(--navy);
  border-color: var(--navy);
}

.diagnosis-result {
  min-height: 206px;
  padding: 24px;
  border-left: 6px solid var(--green);
  background: #f8fbf4;
}

.diagnosis-result span {
  display: block;
  margin-bottom: 10px;
  color: var(--green-2);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.proof {
  display: grid;
  grid-template-columns: minmax(300px, 0.95fr) minmax(0, 0.85fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
}

.proof img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.faq {
  background: var(--soft);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 980px;
  margin: 0 auto;
}

.faq-grid details {
  padding: 18px 20px;
}

.faq-grid summary {
  color: var(--navy);
  cursor: pointer;
  font-weight: 800;
  line-height: 1.4;
}

.faq-grid p {
  margin: 12px 0 0;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(340px, 1fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
  background: var(--navy);
}

.contact h2,
.contact p:not(.eyebrow) {
  color: var(--white);
}

.contact p:not(.eyebrow) {
  color: #d8e2ea;
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  padding: 20px;
}

.contact-form label {
  display: grid;
  gap: 7px;
  color: var(--navy);
  font-size: 13px;
  font-weight: 800;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 12px;
  color: var(--ink);
  background: var(--white);
}

.contact-form textarea {
  resize: vertical;
}

.wide {
  grid-column: 1 / -1;
}

.form-note {
  grid-column: 1 / -1;
  margin: -4px 0 0;
  font-size: 13px;
}

.site-footer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 22px;
  align-items: center;
  padding: 28px clamp(18px, 5vw, 72px);
  color: var(--white);
  background: #041126;
}

.site-footer img {
  width: 156px;
}

.site-footer strong,
.site-footer span {
  display: block;
}

.site-footer span,
.site-footer a {
  color: #c9d5df;
  font-size: 14px;
}

@media (max-width: 1040px) {
  .model-grid,
  .solutions-grid,
  .sector-grid,
  .management-grid,
  .timeline {
    grid-template-columns: repeat(2, 1fr);
  }

  .work-grid {
    grid-template-columns: 1fr 1fr;
  }

  .work-feature {
    grid-column: 1 / -1;
  }
}

@media (max-width: 820px) {
  .site-header {
    min-height: 68px;
  }

  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 68px;
    left: 12px;
    right: 12px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 13px 12px;
  }

  .hero {
    min-height: 94svh;
    padding-top: 96px;
  }

  .hero-panel,
  .section-grid,
  .section-heading.split,
  .model-grid,
  .diagnosis,
  .proof,
  .contact,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    margin-left: 0;
  }

  .diagnosis-copy {
    margin-left: 0;
  }
}

@media (max-width: 620px) {
  .hero {
    padding-inline: 16px;
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(3, 17, 40, 0.92), rgba(3, 17, 40, 0.54)),
      linear-gradient(0deg, rgba(3, 17, 40, 0.72), rgba(3, 17, 40, 0.02) 48%);
  }

  h1 {
    font-size: clamp(36px, 12vw, 54px);
  }

  h2 {
    font-size: clamp(28px, 9vw, 38px);
  }

  .hero-panel,
  .solutions-grid,
  .sector-grid,
  .management-grid,
  .faq-grid,
  .work-grid,
  .timeline,
  .option-grid,
  .contact-form {
    grid-template-columns: 1fr;
  }

  .solution-card,
  .timeline article {
    min-height: auto;
  }

  .solution-card span,
  .timeline span {
    margin-bottom: 22px;
  }

  .work-feature img {
    height: 300px;
  }

  .contact-form {
    padding: 16px;
  }
}