:root {
  --ink: #17252b;
  --ink-soft: #213740;
  --muted: #60727a;
  --line: #dce6ea;
  --paper: #f7fafb;
  --white: #ffffff;
  --green: #2f9f68;
  --green-dark: #17744a;
  --amber: #e8a735;
  --blue: #2d6f93;
  --panel: #edf4f6;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.5;
}

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

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 9px clamp(18px, 4vw, 64px);
  background: var(--ink);
  color: #d7e5e9;
  font-size: 13px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 64px);
  background: rgba(247, 250, 251, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: 190px;
  flex: 0 0 auto;
}

.brand img {
  display: block;
  width: 100%;
  height: auto;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 24px);
  color: #31444c;
  font-size: 15px;
}

.header-cta,
.primary-btn,
.secondary-btn,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 8px;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
}

.header-cta,
.primary-btn,
button {
  background: var(--green);
  color: var(--white);
}

.secondary-btn {
  background: var(--white);
  color: var(--ink);
  border-color: var(--line);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(360px, 1.06fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(42px, 6vw, 88px) clamp(18px, 4vw, 64px) clamp(30px, 5vw, 58px);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(115deg, rgba(47, 159, 104, 0.12), transparent 42%),
    linear-gradient(180deg, #ffffff 0%, #eef5f7 100%);
}

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

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

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(42px, 5.4vw, 72px);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.2;
}

.hero-text {
  max-width: 620px;
  color: var(--muted);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 28px;
}

.hero-specs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: 680px;
  margin: 0 0 24px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.hero-specs div {
  padding: 16px;
  background: rgba(255, 255, 255, 0.86);
}

.hero-specs dt,
.hero-specs dd {
  margin: 0;
}

.hero-specs dt {
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero-specs dd {
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.trust-row span {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.7);
  color: #40545d;
  font-size: 14px;
  font-weight: 700;
}

.hero-media img {
  display: block;
  width: 100%;
  max-height: 620px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid rgba(23, 37, 43, 0.1);
  box-shadow: 0 22px 60px rgba(23, 37, 43, 0.16);
}

.credibility-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}

.credibility-strip div {
  display: grid;
  gap: 6px;
  min-height: 136px;
  padding: 26px clamp(18px, 3vw, 34px);
  background: #ffffff;
}

.credibility-strip strong {
  font-size: 19px;
}

.credibility-strip span {
  color: var(--muted);
}

.section {
  padding: clamp(54px, 7vw, 96px) clamp(18px, 4vw, 64px);
}

.intro,
.split,
.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: start;
}

.intro p,
.split p,
.contact-copy p {
  color: var(--muted);
  font-size: 18px;
}

.b2b-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  padding-top: 0;
  padding-bottom: 0;
  background: var(--line);
}

.b2b-strip div {
  display: grid;
  gap: 8px;
  min-height: 150px;
  padding: 28px;
  background: var(--white);
}

.b2b-strip strong {
  font-size: 20px;
}

.b2b-strip span {
  color: var(--muted);
}

.engineering {
  background: #ffffff;
}

.engineering-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.engineering-grid article {
  display: grid;
  align-content: start;
  min-height: 260px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, #ffffff 0%, #eef5f7 100%);
}

.engineering-grid span {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 32px;
  border-radius: 8px;
  background: var(--green);
  color: #ffffff;
  font-size: 13px;
  font-weight: 800;
}

.engineering-grid p {
  color: var(--muted);
}

.section-title {
  max-width: 760px;
  margin-bottom: 30px;
}

.product-band {
  background: var(--ink);
  color: var(--white);
}

.product-band .eyebrow {
  color: #78d69e;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.model-matrix {
  display: grid;
  margin-top: 28px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
}

.model-matrix > div {
  display: grid;
  grid-template-columns: 1.05fr 1.35fr 0.8fr 1fr;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: #d8e4e8;
}

.model-matrix > div span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.model-matrix > div:last-child {
  border-bottom: 0;
}

.model-matrix .matrix-head {
  background: rgba(255, 255, 255, 0.08);
  color: #78d69e;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.model-matrix span:first-child {
  font-weight: 800;
}

.product-card {
  min-height: 360px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: #22333a;
}

.product-card.featured {
  background: #f6fbf8;
  color: var(--ink);
}

.product-card p {
  color: #b9c7cc;
}

.product-card.featured p {
  color: var(--muted);
}

.power {
  display: inline-block;
  margin-bottom: 30px;
  color: var(--amber);
  font-size: 15px;
  font-weight: 800;
}

ul {
  display: grid;
  gap: 8px;
  margin: 24px 0 0;
  padding-left: 18px;
}

li {
  padding-left: 4px;
}

.hybrid {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(420px, 1.18fr);
  gap: clamp(26px, 5vw, 70px);
  align-items: start;
  background: #ffffff;
}

.hybrid-copy {
  position: sticky;
  top: 96px;
}

.hybrid-copy p {
  color: var(--muted);
  font-size: 18px;
}

.feature-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.feature-pills span {
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--panel);
  color: #33474f;
  font-size: 14px;
  font-weight: 800;
}

.hybrid-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.hybrid-gallery img {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 8px;
  object-fit: cover;
  background: #ffffff;
  border: 1px solid var(--line);
}

.hybrid-gallery .gallery-main {
  grid-column: span 2;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  padding: 18px;
}

.video-section {
  background: var(--panel);
}

.video-section video {
  display: block;
  width: min(100%, 1080px);
  max-height: 680px;
  border-radius: 8px;
  background: #000000;
  object-fit: contain;
}

.solar-kit {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  background: #ffffff;
}

.solar-kit-copy p {
  color: var(--muted);
  font-size: 18px;
}

.kit-points {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.kit-points div {
  display: grid;
  gap: 5px;
  padding: 18px;
  border-left: 5px solid var(--green);
  border-radius: 8px;
  background: var(--panel);
}

.kit-points strong {
  font-size: 20px;
}

.kit-points span {
  color: var(--muted);
}

.solar-kit-media img {
  display: block;
  width: 100%;
  max-height: 640px;
  border-radius: 8px;
  object-fit: contain;
  background: #ffffff;
  border: 1px solid var(--line);
}

.system-details {
  background: var(--panel);
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.system-grid article {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.system-grid img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #eef4f7;
}

.system-grid h3,
.system-grid p {
  padding-left: 22px;
  padding-right: 22px;
}

.system-grid h3 {
  margin-top: 20px;
}

.system-grid p {
  padding-bottom: 22px;
  color: var(--muted);
}

.capability {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(420px, 1.2fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: start;
  background: #ffffff;
}

.capability-copy p {
  color: var(--muted);
  font-size: 18px;
}

.capability-media {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.capability-media img {
  width: 100%;
  max-height: 520px;
  border: 1px solid var(--line);
  border-radius: 8px;
  object-fit: cover;
  background: #ffffff;
}

.application-list {
  display: grid;
  gap: 14px;
}

.application-list div {
  display: grid;
  gap: 5px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.application-list strong {
  font-size: 19px;
}

.application-list span {
  color: var(--muted);
}

.home-specialist {
  background: #ffffff;
}

.specialist-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.specialist-grid article {
  min-height: 270px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, #f9fcfd 0%, #edf5f3 100%);
}

.specialist-grid span {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 34px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--white);
  font-size: 13px;
  font-weight: 800;
}

.specialist-grid p {
  color: var(--muted);
}

.specs {
  background: var(--panel);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.quality {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(420px, 1.22fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: start;
  background: #ffffff;
}

.quality-copy {
  position: sticky;
  top: 92px;
}

.quality-copy p {
  color: var(--muted);
  font-size: 18px;
}

.quality-steps {
  display: grid;
  border-top: 1px solid var(--line);
}

.quality-steps div {
  display: grid;
  grid-template-columns: minmax(180px, 0.55fr) minmax(0, 1fr);
  gap: 22px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.quality-steps strong {
  color: var(--ink);
  font-size: 18px;
}

.quality-steps span {
  color: var(--muted);
}

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
}

th,
td {
  padding: 18px 20px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

th {
  background: #e8f0f3;
  font-size: 14px;
  text-transform: uppercase;
}

td {
  color: #34474f;
}

.guide {
  background: #ffffff;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.guide-grid div {
  display: grid;
  gap: 10px;
  padding: 22px;
  border-left: 5px solid var(--green);
  border-radius: 8px;
  background: var(--panel);
}

.guide-grid strong {
  font-size: 20px;
}

.guide-grid span {
  color: var(--muted);
}

.choose {
  background: var(--ink);
  color: var(--white);
}

.choose .eyebrow {
  color: #78d69e;
}

.choose-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.choose-grid article {
  min-height: 205px;
  padding: 24px;
  border-radius: 8px;
  background: #22333a;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.choose-grid p {
  color: #b9c7cc;
}

.procurement {
  background: var(--panel);
}

.procurement-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.procurement-grid div {
  display: grid;
  gap: 10px;
  min-height: 170px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.procurement-grid strong {
  color: var(--ink-soft);
  font-size: 19px;
}

.procurement-grid span {
  color: var(--muted);
}

.faq {
  background: #ffffff;
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 980px;
}

details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

summary {
  padding: 20px 22px;
  cursor: pointer;
  font-weight: 800;
}

details p {
  margin: 0;
  padding: 0 22px 22px;
  color: var(--muted);
}

.oem-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.oem-grid div {
  padding: 24px;
  border-radius: 8px;
  background: var(--white);
  border: 1px solid var(--line);
}

.oem-grid span {
  display: block;
  margin-bottom: 32px;
  color: var(--blue);
  font-weight: 800;
}

.oem-grid p {
  color: var(--muted);
}

.contact {
  margin: 0 clamp(18px, 4vw, 64px) clamp(28px, 5vw, 64px);
  padding: clamp(34px, 5vw, 60px);
  border-radius: 8px;
  background: var(--ink);
  color: var(--white);
}

.contact .eyebrow {
  color: #78d69e;
}

.quote-form {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 7px;
  color: #d6e0e4;
  font-size: 14px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  padding: 13px 14px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  font: inherit;
}

textarea {
  resize: vertical;
}

select option {
  color: var(--ink);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px clamp(18px, 4vw, 64px);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

@media (max-width: 880px) {
  .topbar {
    display: none;
  }

  .site-header {
    align-items: flex-start;
  }

  nav,
  .header-cta {
    display: none;
  }

  .hero,
  .intro,
  .credibility-strip,
  .b2b-strip,
  .hybrid,
  .solar-kit,
  .capability,
  .quality,
  .split,
  .contact {
    grid-template-columns: 1fr;
  }

  .hybrid-copy {
    position: static;
  }

  .quality-copy {
    position: static;
  }

  .hero {
    min-height: auto;
  }

  .hero-media {
    order: -1;
  }

  .product-grid,
  .engineering-grid,
  .specialist-grid,
  .guide-grid,
  .system-grid,
  .choose-grid,
  .procurement-grid,
  .oem-grid {
    grid-template-columns: 1fr;
  }

  .model-matrix {
    overflow-x: auto;
  }

  .model-matrix > div {
    min-width: 680px;
  }

  .quality-steps div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .capability-media {
    grid-template-columns: 1fr;
  }

  .product-card,
  .specialist-grid article,
  .choose-grid article {
    min-height: auto;
  }

  .contact {
    margin-left: 18px;
    margin-right: 18px;
  }

  footer {
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  h1 {
    font-size: 36px;
  }

  .hero-specs {
    grid-template-columns: 1fr;
  }

  .hero-actions a {
    width: 100%;
  }

  .section,
  .hero {
    padding-left: 16px;
    padding-right: 16px;
  }
}