:root {
  --orange: #ff7a00;
  --orange-dark: #d85f00;
  --yellow: #ffbf38;
  --black: #101010;
  --graphite: #242424;
  --gray: #666;
  --light: #f7f7f7;
  --white: #fff;
  --border: rgba(16, 16, 16, 0.12);
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.12);
  --radius: 28px;
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: Inter, Montserrat, Arial, sans-serif;
  color: var(--black);
  background: var(--white);
  line-height: 1.5;
}
body.menu-open {
  overflow: hidden;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
button,
input,
textarea,
select {
  font: inherit;
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.section {
  padding: 96px 0;
  position: relative;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  color: var(--orange-dark);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 13px;
}
.eyebrow::before {
  content: "";
  width: 34px;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--yellow));
}

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}
.header__inner {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
}
.logo__icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: var(--white);
  background: linear-gradient(135deg, var(--orange), var(--yellow));
  box-shadow: 0 10px 24px rgba(255, 122, 0, 0.28);
}
.logo__text {
  font-size: 20px;
  letter-spacing: -0.02em;
}
.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #333;
  font-weight: 650;
}
.nav a {
  transition: color 0.2s ease;
}
.nav a:hover {
  color: var(--orange-dark);
}
.header__cta {
  padding: 12px 18px;
  border-radius: 999px;
  color: var(--white);
  background: var(--black);
  font-weight: 800;
  transition:
    transform 0.2s ease,
    background 0.2s ease;
}
.header__cta:hover {
  transform: translateY(-2px);
  background: var(--orange-dark);
}
.burger {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  padding: 10px;
}
.burger span {
  display: block;
  height: 2px;
  margin: 6px 0;
  background: var(--black);
  border-radius: 4px;
}

.hero {
  min-height: 750px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(
      circle at 10% 10%,
      rgba(255, 122, 0, 0.15),
      transparent 28%
    ),
    radial-gradient(
      circle at 80% 20%,
      rgba(255, 191, 56, 0.2),
      transparent 22%
    ),
    linear-gradient(135deg, #ffffff 0%, #f5f5f5 100%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(
      120deg,
      transparent 0 58%,
      rgba(16, 16, 16, 0.04) 58% 62%,
      transparent 62%
    ),
    linear-gradient(
      120deg,
      transparent 0 68%,
      rgba(255, 122, 0, 0.08) 68% 72%,
      transparent 72%
    );
  pointer-events: none;
}
.hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: flex-start;
}

.ban-img {
  border-radius: 16px;
}

.hero h1 {
  margin: 0 0 24px;
  max-width: 780px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 0.94;
  letter-spacing: -0.06em;
}
.hero__lead {
  max-width: 660px;
  margin: 0 0 34px;
  font-size: 20px;
  color: #343434;
}
.hero__actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 42px;
}
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 54px;
  padding: 15px 24px;
  border-radius: 999px;
  border: 0;
  cursor: pointer;
  font-weight: 900;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease;
}
.btn:hover {
  transform: translateY(-2px);
}
.btn--primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--orange), var(--yellow));
  box-shadow: 0 14px 30px rgba(255, 122, 0, 0.28);
}
.btn--secondary {
  background: var(--white);
  border: 1px solid var(--border);
}
.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 720px;
}
.hero__stats div {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.78);
  border-radius: 22px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.06);
}
.hero__stats strong {
  display: block;
  font-size: 24px;
  letter-spacing: -0.04em;
}
.hero__stats span {
  display: block;
  margin-top: 4px;
  color: var(--gray);
  font-size: 14px;
}
.hero__visual {
  min-height: 520px;
  position: relative;
  display: grid;
  place-items: center;
}
.energy-card {
  width: min(470px, 100%);
  padding: 28px;
  border-radius: 34px;
  background: rgba(16, 16, 16, 0.94);
  color: var(--white);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.26);
  overflow: hidden;
  position: relative;
}
.energy-card::before {
  content: "";
  position: absolute;
  inset: -60px -80px auto auto;
  width: 210px;
  height: 210px;
  border-radius: 999px;
  background: rgba(255, 122, 0, 0.36);
  filter: blur(18px);
}
.energy-card__top,
.energy-card__bottom {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.energy-card__top span {
  color: rgba(255, 255, 255, 0.68);
}
.energy-card__top b {
  padding: 7px 11px;
  color: #0c3518;
  background: #70ff95;
  border-radius: 999px;
  font-size: 12px;
}
.battery {
  position: relative;
  margin: 54px 0 44px;
  height: 235px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  align-items: end;
}
.battery span {
  display: block;
  height: var(--h);
  border-radius: 16px 16px 8px 8px;
  background: linear-gradient(180deg, var(--yellow), var(--orange));
  box-shadow: 0 0 42px rgba(255, 122, 0, 0.35);
}
.energy-line {
  height: 2px;
  margin: 0 0 24px;
  background: linear-gradient(90deg, transparent, var(--orange), transparent);
}
.energy-card__bottom div {
  display: grid;
  gap: 2px;
}
.energy-card__bottom span {
  color: rgba(255, 255, 255, 0.58);
}
.energy-card__bottom strong {
  font-size: 24px;
  letter-spacing: -0.04em;
}
.floating {
  position: absolute;
  display: grid;
  place-items: center;
  width: 88px;
  height: 88px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
  font-weight: 950;
  color: var(--orange-dark);
}
.floating--solar {
  top: 70px;
  left: 20px;
  transform: rotate(-10deg);
}
.floating--ups {
  bottom: 80px;
  left: 40px;
  transform: rotate(8deg);
}
.floating--hvm {
  right: 0;
  top: 150px;
  transform: rotate(12deg);
}

.strip {
  padding: 22px 0;
  background: var(--black);
  color: var(--white);
}
.strip__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}
.strip span {
  padding: 9px 16px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.82);
}

.section-head {
  max-width: 760px;
  margin-bottom: 42px;
}
.section-head h2,
.dark h2,
.cta h2 {
  margin: 0 0 16px;
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1;
  letter-spacing: -0.05em;
}
.section-head p,
.dark p,
.cta p {
  margin: 0;
  color: var(--gray);
  font-size: 18px;
}
.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.card {
  padding: 28px;
  min-height: 260px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.04);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  border-color: rgba(255, 122, 0, 0.35);
}
.card__icon {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  color: var(--white);
  background: var(--black);
  font-weight: 900;
  margin-bottom: 26px;
}
.card h3 {
  margin: 0 0 12px;
  font-size: 24px;
  line-height: 1.1;
  letter-spacing: -0.03em;
}
.card p {
  margin: 0;
  color: var(--gray);
}

.dark {
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(
      circle at 80% 20%,
      rgba(255, 122, 0, 0.24),
      transparent 28%
    ),
    linear-gradient(135deg, #101010, #21140a);
}
.dark__grid {
  display: grid;
  grid-template-columns: 0.8fr 1fr;
  gap: 60px;
  align-items: center;
}
.dark .eyebrow {
  color: var(--yellow);
}
.dark p {
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 28px;
}
.benefits {
  display: grid;
  gap: 16px;
}
.benefit {
  display: grid;
  grid-template-columns: 76px 1fr;
  align-items: center;
  gap: 18px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.06);
}
.benefit strong {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--orange), var(--yellow));
  color: var(--black);
}
.benefit span {
  color: rgba(255, 255, 255, 0.88);
  font-weight: 750;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 26px;
  border-radius: var(--radius);
  background: var(--light);
  border: 1px solid var(--border);
}
.step span {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 46px;
  border-radius: 50%;
  background: var(--orange);
  color: var(--white);
  font-weight: 900;
}
.step h3 {
  margin: 0 0 10px;
  font-size: 24px;
}
.step p {
  margin: 0;
  color: var(--gray);
}

.cta {
  background:
    radial-gradient(circle at 10% 0%, rgba(255, 122, 0, 0.12), transparent 28%),
    var(--light);
}
.cta__grid {
  display: grid;
  grid-template-columns: 0.85fr 1fr;
  gap: 44px;
  align-items: start;
}
.check-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.check-list li {
  position: relative;
  padding-left: 34px;
  font-weight: 750;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--orange), var(--yellow));
}
.check-list li::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 9px;
  width: 8px;
  height: 5px;
  border-left: 2px solid var(--white);
  border-bottom: 2px solid var(--white);
  transform: rotate(-45deg);
}
.form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  padding: 28px;
  border-radius: 34px;
  background: var(--white);
  box-shadow: var(--shadow);
}
.form label {
  display: grid;
  gap: 8px;
}
.form label span {
  font-weight: 800;
  font-size: 14px;
}
.form input,
.form select,
.form textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 15px 16px;
  outline: none;
  background: #fff;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}
.form textarea {
  resize: vertical;
  min-height: 126px;
}
.form input:focus,
.form select:focus,
.form textarea:focus {
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 0, 0.12);
}
.form__full {
  grid-column: 1 / -1;
}
.agree {
  display: flex !important;
  grid-template-columns: auto 1fr;
  align-items: flex-start;
  gap: 10px !important;
  color: var(--gray);
  font-size: 14px;
}
.agree input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  padding: 0;
}
.agree span {
  font-weight: 600 !important;
}
.hidden-field {
  position: absolute !important;
  left: -9999px !important;
  opacity: 0 !important;
}
.form__status {
  display: none;
  padding: 14px 16px;
  border-radius: 16px;
  font-weight: 750;
}
.form__status.is-success {
  display: block;
  color: #0c5121;
  background: #e7f8ec;
}
.form__status.is-error {
  display: block;
  color: #6b1111;
  background: #ffe8e8;
}

.footer {
  padding: 34px 0;
  background: var(--black);
  color: var(--white);
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.footer__inner div {
  display: grid;
  gap: 2px;
}
.footer__inner span {
  color: rgba(255, 255, 255, 0.6);
}
.footer a {
  color: var(--yellow);
  font-weight: 800;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.65s ease,
    transform 0.65s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .nav,
  .header__cta {
    display: none;
  }
  .burger {
    display: block;
  }
  .nav.is-open {
    position: fixed;
    display: grid;
    left: 16px;
    right: 16px;
    top: 86px;
    padding: 22px;
    border-radius: 24px;
    background: var(--white);
    box-shadow: var(--shadow);
  }
  .hero {
    min-height: auto;
  }
  .hero__grid,
  .dark__grid,
  .cta__grid {
    grid-template-columns: 1fr;
  }
  .hero__visual {
    min-height: 440px;
  }
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .timeline {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .section {
    padding: 68px 0;
  }
  .header__inner {
    height: 68px;
  }
  .logo__text {
    font-size: 18px;
  }
  .hero h1 {
    font-size: 42px;
  }
  .hero__lead {
    font-size: 17px;
  }
  .hero__stats,
  .cards,
  .timeline,
  .form {
    grid-template-columns: 1fr;
  }
  .form__full {
    grid-column: auto;
  }
  .energy-card {
    padding: 20px;
    border-radius: 26px;
  }
  .floating {
    width: 68px;
    height: 68px;
    border-radius: 20px;
    font-size: 14px;
  }
  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}