/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

/* ---------- Tokens ---------- */
:root {
  --bg: #040814;
  --bg-2: #0a1124;
  --panel: #0e1730;
  --panel-2: #111c3a;
  --border: rgba(0, 200, 255, 0.14);
  --border-strong: rgba(0, 200, 255, 0.28);
  --text: #e6f1ff;
  --muted: #8aa0c2;
  --primary: #00c6ff;
  --primary-2: #00e1ff;
  --primary-soft: rgba(0, 198, 255, 0.12);
  --grad: linear-gradient(135deg, #00c6ff 0%, #22e6ff 50%, #7df9ff 100%);
  --grad-soft: linear-gradient(
    135deg,
    rgba(0, 198, 255, 0.18),
    rgba(125, 249, 255, 0.05)
  );
  --shadow: 0 10px 40px -10px rgba(0, 198, 255, 0.35);
  --radius: 14px;
  --radius-lg: 22px;
  --container: 1200px;
}

html,
body {
  background: var(--bg);
  color: var(--text);
  font-family:
    "Inter",
    "SF Pro Display",
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}
body {
  background:
    radial-gradient(
      1000px 600px at 85% -10%,
      rgba(0, 198, 255, 0.18),
      transparent 60%
    ),
    radial-gradient(
      800px 500px at -10% 30%,
      rgba(0, 120, 255, 0.12),
      transparent 60%
    ),
    radial-gradient(
      900px 600px at 50% 110%,
      rgba(0, 198, 255, 0.1),
      transparent 60%
    ),
    var(--bg);
  overflow-x: hidden;
}

/* network dots overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(rgba(125, 225, 255, 0.18) 1.2px, transparent 1.4px),
    radial-gradient(rgba(125, 225, 255, 0.1) 1px, transparent 1.2px);
  background-size:
    46px 46px,
    90px 90px;
  background-position:
    0 0,
    23px 23px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 30%, transparent 80%);
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--grad);
  color: #001018;
  box-shadow: var(--shadow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 50px -10px rgba(0, 225, 255, 0.55);
}
.btn-ghost {
  border: 1px solid var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
}

/* ---------- Nav ---------- */
header.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(4, 8, 20, 0.65);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
}
.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: #04122a;
  padding: 4px;
  border: 1px solid var(--border);
}
.brand span b {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
nav ul {
  display: flex;
  gap: 30px;
  list-style: none;
}
nav a {
  color: var(--muted);
  font-size: 14.5px;
  font-weight: 500;
  transition: color 0.2s;
}
nav a:hover {
  color: var(--primary-2);
}
.nav-cta {
  display: flex;
  gap: 10px;
  align-items: center;
}
.nav-cta .btn {
  padding: 10px 20px;
  font-size: 14px;
}
@media (max-width: 880px) {
  nav ul,
  .nav-cta .btn-ghost {
    display: none;
  }
  .nav-cta {
    margin-top: 8px;
    margin-bottom: 8px;
  }
}

/* ---------- Hero ---------- */
.hero {
  padding: 90px 0 80px;
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}
@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 50px;
  }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--primary-soft);
  border: 1px solid var(--border-strong);
  color: var(--primary-2);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 22px;
}
.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--primary-2);
  box-shadow: 0 0 12px var(--primary-2);
}

h1 {
  font-size: clamp(38px, 5.2vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  font-weight: 800;
  margin-bottom: 24px;
}
h1 .accent {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  color: var(--muted);
  font-size: 18px;
  max-width: 560px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.stats {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
.stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  min-width: 140px;
}
.stat b {
  display: block;
  font-size: 26px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.02em;
}
.stat span {
  color: var(--muted);
  font-size: 13px;
}

/* Hero visual card */
.hero-visual {
  position: relative;
  border: 1px solid var(--border-strong);
  background: linear-gradient(
    160deg,
    rgba(0, 198, 255, 0.1),
    rgba(0, 40, 80, 0.45)
  );
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: 0 30px 80px -30px rgba(0, 198, 255, 0.45);
}
.hero-visual::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(
    135deg,
    rgba(0, 198, 255, 0.5),
    transparent 40%,
    transparent 60%,
    rgba(0, 198, 255, 0.3)
  );
  -webkit-mask:
    linear-gradient(#000, #000) content-box,
    linear-gradient(#000, #000);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  padding: 1px;
  pointer-events: none;
}
.charger-card {
  background: #06122a;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
}
.charger-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.charger-head .led {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--primary-2);
  font-weight: 600;
}
.charger-head .led::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary-2);
  box-shadow: 0 0 14px var(--primary-2);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.55;
    transform: scale(0.9);
  }
}
.charger-big {
  font-size: 54px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
}
.charger-big small {
  font-size: 18px;
  font-weight: 600;
  color: var(--muted);
  margin-left: 6px;
}
.charger-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}
.meta {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
}
.meta span {
  display: block;
  color: var(--muted);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}
.meta b {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}
.bar {
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  overflow: hidden;
  margin-top: 22px;
}
.bar i {
  display: block;
  height: 100%;
  width: 72%;
  background: var(--grad);
  border-radius: inherit;
  box-shadow: 0 0 18px var(--primary);
}
.charger-foot {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12.5px;
  margin-top: 10px;
}

/* ---------- Section base ---------- */
section {
  padding: 100px 0;
  position: relative;
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}
.section-head h2 {
  font-size: clamp(30px, 3.4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 16px;
}
.section-head h2 .accent {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section-head p {
  color: var(--muted);
  font-size: 17px;
}

/* ---------- Features ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
@media (max-width: 880px) {
  .features {
    grid-template-columns: 1fr;
  }
}
.feature {
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition:
    transform 0.3s ease,
    border-color 0.3s ease,
    box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}
.feature::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    400px 200px at 100% 0%,
    rgba(0, 198, 255, 0.1),
    transparent 60%
  );
  opacity: 0;
  transition: opacity 0.3s;
}
.feature:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
  box-shadow: 0 20px 50px -20px rgba(0, 198, 255, 0.25);
}
.feature:hover::before {
  opacity: 1;
}
.feature .ico {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--grad-soft);
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-2);
  margin-bottom: 22px;
}
.feature h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.feature p {
  color: var(--muted);
  font-size: 15px;
}

/* ---------- Solutions ---------- */
.solutions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
@media (max-width: 880px) {
  .solutions {
    grid-template-columns: 1fr;
  }
}
.sol {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 42px;
  border: 1px solid var(--border-strong);
  background: linear-gradient(
    160deg,
    rgba(0, 198, 255, 0.12),
    rgba(4, 12, 30, 0.7)
  );
  overflow: hidden;
  min-height: 340px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.sol::after {
  content: "";
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 198, 255, 0.35), transparent 60%);
  right: -120px;
  top: -120px;
  filter: blur(20px);
}
.sol .tag {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  border: 1px solid var(--border-strong);
  color: var(--primary-2);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.sol h3 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  line-height: 1.15;
}
.sol p {
  color: var(--muted);
  font-size: 15.5px;
  margin-bottom: 24px;
  max-width: 440px;
}
.sol ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}
.sol li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: #cfe4ff;
}
.sol li::before {
  content: "";
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--grad);
  display: inline-flex;
  flex-shrink: 0;
  box-shadow: 0 0 12px rgba(0, 198, 255, 0.55);
  background-image: var(--grad);
}

/* ---------- How ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}
@media (max-width: 980px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 560px) {
  .steps {
    grid-template-columns: 1fr;
  }
}
.step {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
}
.step b.num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--grad);
  color: #001018;
  font-weight: 800;
  font-size: 18px;
  margin-bottom: 18px;
}
.step h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.step p {
  color: var(--muted);
  font-size: 14.5px;
}

/* ---------- Metrics strip ---------- */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
}
@media (max-width: 760px) {
  .metrics {
    grid-template-columns: repeat(2, 1fr);
  }
}
.metric {
  text-align: center;
  border-right: 1px solid var(--border);
  padding: 6px;
}
.metric:last-child {
  border-right: none;
}
@media (max-width: 760px) {
  .metric {
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding-bottom: 18px;
  }
  .metric:nth-last-child(-n + 2) {
    border-bottom: none;
    padding-bottom: 6px;
  }
}
.metric b {
  display: block;
  font-size: 38px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.02em;
}
.metric span {
  color: var(--muted);
  font-size: 13.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---------- CTA banner ---------- */
.cta-banner {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: 60px 50px;
  background: linear-gradient(135deg, #001a2e, #003a55);
  border: 1px solid var(--border-strong);
  text-align: center;
}
.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    600px 300px at 50% 0%,
    rgba(0, 225, 255, 0.4),
    transparent 70%
  );
  pointer-events: none;
}
.cta-banner h2 {
  position: relative;
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.cta-banner p {
  position: relative;
  color: #bcd6f0;
  max-width: 560px;
  margin: 0 auto 30px;
  font-size: 17px;
}
.cta-banner .btn {
  position: relative;
}

/* ---------- FAQ ---------- */
.faq {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
details {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 24px;
  transition: border-color 0.2s;
}
details[open] {
  border-color: var(--border-strong);
  background: var(--panel-2);
}
summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 600;
  font-size: 16.5px;
  list-style: none;
}
summary::-webkit-details-marker {
  display: none;
}
summary::after {
  content: "+";
  color: var(--primary-2);
  font-size: 24px;
  font-weight: 300;
  transition: transform 0.2s;
}
details[open] summary::after {
  transform: rotate(45deg);
}
details p {
  margin-top: 14px;
  color: var(--muted);
  font-size: 15px;
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 50px 0 30px;
  margin-top: 60px;
  color: var(--muted);
  font-size: 14px;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
@media (max-width: 760px) {
  .foot-grid {
    grid-template-columns: 1fr 1fr;
  }
}
.foot-grid h5 {
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.foot-grid ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.foot-grid a:hover {
  color: var(--primary-2);
}
.copyright {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
  padding-top: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Responsive refinements ---------- */
html,
body {
  overflow-x: hidden;
  max-width: 100%;
}
h1,
h2,
h3,
p {
  overflow-wrap: break-word;
  word-wrap: break-word;
}
img,
svg {
  max-width: 100%;
}
@media (max-width: 980px) {
  section {
    padding: 70px 0;
  }
  .hero {
    padding: 60px 0 50px;
  }
  .hero-visual {
    padding: 24px;
  }
}
@media (max-width: 760px) {
  .container {
    padding: 0 16px;
  }
  section {
    padding: 56px 0;
  }
  .hero {
    padding: 40px 0 36px;
  }
  h1 {
    font-size: clamp(30px, 7vw, 42px);
  }
  .lead {
    font-size: 16px;
  }
  .btn {
    padding: 13px 20px;
    font-size: 14.5px;
    width: 100%;
    justify-content: center;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }
  .stats {
    gap: 10px;
  }
  .stat {
    flex: 1 1 calc(50% - 10px);
    min-width: 0;
    padding: 14px 14px;
  }
  .stat b {
    font-size: 20px;
  }
  .hero-visual {
    padding: 14px;
  }
  .charger-card {
    padding: 16px;
    min-width: 0;
  }
  .charger-big {
    font-size: 34px;
  }
  .charger-head {
    gap: 10px;
  }
  .charger-foot {
    font-size: 11.5px;
    gap: 8px;
    flex-wrap: wrap;
  }
  .charger-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }
  .meta {
    padding: 10px 8px;
    min-width: 0;
    overflow: hidden;
  }
  .meta span {
    font-size: 10px;
    letter-spacing: 0.04em;
  }
  .meta b {
    font-size: 13.5px;
  }
  .feature {
    padding: 24px;
  }
  .sol {
    padding: 26px;
    min-height: auto;
  }
  .sol h3 {
    font-size: 20px;
  }
  .cta-banner {
    padding: 36px 20px;
  }
  .section-head {
    margin-bottom: 40px;
  }
  .section-head h2 {
    font-size: clamp(26px, 6vw, 34px);
  }
  details {
    padding: 16px 18px;
  }
  summary {
    font-size: 15px;
    gap: 12px;
  }
  .copyright {
    flex-direction: column;
    text-align: center;
  }
  nav ul,
  .nav-cta .btn-ghost {
    display: none;
  }
  .nav-cta .btn {
    padding: 9px 16px;
    font-size: 13px;
  }
  .brand {
    font-size: 18px;
  }
  .brand img {
    width: 34px;
    height: 34px;
  }
  .metrics {
    padding: 24px 18px;
  }
}
@media (max-width: 420px) {
  h1 {
    font-size: 28px;
    letter-spacing: -0.02em;
  }
  .eyebrow {
    font-size: 10.5px;
    padding: 5px 10px;
  }
  .charger-big {
    font-size: 28px;
  }
  .charger-big small {
    font-size: 14px;
  }
  .charger-meta {
    grid-template-columns: 1fr 1fr;
  }
  .charger-meta .meta:last-child {
    grid-column: span 2;
  }
  .stat {
    flex: 1 1 100%;
  }
  .feature .ico {
    width: 44px;
    height: 44px;
  }
  .feature h3 {
    font-size: 17px;
  }
  .metric b {
    font-size: 24px;
  }
  .metric span {
    font-size: 11px;
  }
}