:root {
  --bg: #f3f6f8;
  --bg-alt: #e8eef2;
  --surface: #ffffff;
  --ink: #10243a;
  --ink-soft: #4a6074;
  --line: rgba(16, 36, 58, 0.1);
  --brand: #0b6e6b;
  --brand-dark: #085552;
  --accent: #d97706;
  --hero-1: #071a2b;
  --hero-2: #0d4f4c;
  --shadow: 0 18px 40px rgba(7, 26, 43, 0.12);
  --radius: 18px;
  --container: 1160px;
  --font-display: "Outfit", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "Outfit", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  background: var(--bg);
  line-height: 1.65;
}

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

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

.container {
  width: min(100% - 32px, var(--container));
  margin-inline: auto;
}

.topbar {
  background: #06131f;
  color: rgba(255, 255, 255, 0.86);
  font-size: 13px;
}

.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 36px;
}

.topbar-link {
  color: #fbbf24;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.site-header.is-scrolled {
  border-color: var(--line);
  box-shadow: 0 8px 24px rgba(7, 26, 43, 0.06);
}

.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, var(--brand), #148f8a);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-size: 20px;
  font-family: var(--font-display);
}

.brand-text small {
  color: var(--ink-soft);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 22px;
}

.site-nav a {
  color: var(--ink-soft);
  font-size: 15px;
  transition: color 0.2s ease;
}

.site-nav a:hover {
  color: var(--brand);
}

.header-actions {
  display: flex;
  gap: 10px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 0;
  background: transparent;
  padding: 10px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 6px 0;
  background: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-lg {
  min-height: 48px;
  padding: 0 24px;
  font-size: 15px;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover {
  background: var(--brand-dark);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
}

.btn-outline {
  border-color: rgba(255, 255, 255, 0.55);
  color: #fff;
  background: transparent;
}

.btn-outline-light {
  border-color: rgba(255, 255, 255, 0.55);
  color: #fff;
}

.btn-outline-light:hover,
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
}

.hero {
  position: relative;
  min-height: min(88vh, 760px);
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(7, 26, 43, 0.88) 18%, rgba(11, 110, 107, 0.55) 58%, rgba(7, 26, 43, 0.75) 100%),
    radial-gradient(circle at 78% 28%, rgba(251, 191, 36, 0.22), transparent 28%),
    linear-gradient(160deg, var(--hero-1), var(--hero-2));
  transform: scale(1.02);
  animation: heroDrift 14s ease-in-out infinite alternate;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 75%);
  opacity: 0.35;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 120px 0 88px;
  max-width: 760px;
  margin-left: max(16px, calc((100% - var(--container)) / 2));
  animation: heroIn 0.9s ease both;
}

.brand-hero {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(28px, 4.4vw, 44px);
  font-weight: 700;
  line-height: 1.25;
}

.hero-lead {
  margin: 0 0 28px;
  max-width: 34rem;
  color: rgba(255, 255, 255, 0.84);
  font-size: 17px;
}

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

.stats {
  margin-top: -42px;
  position: relative;
  z-index: 2;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  padding: 18px;
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.stats-grid article {
  padding: 18px 14px;
}

.stats-grid strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-size: 30px;
  color: var(--brand);
}

.stats-grid span {
  color: var(--ink-soft);
  font-size: 14px;
}

.section {
  padding: 88px 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 40px;
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.3;
}

.section-head p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 16px;
}

.section-head.light {
  color: #fff;
}

.section-head.light p {
  color: rgba(255, 255, 255, 0.78);
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.feature-block {
  padding: 24px 20px 28px;
  border-radius: 16px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.88)),
    var(--bg-alt);
  border: 1px solid var(--line);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-block:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.feature-icon {
  width: 42px;
  height: 42px;
  margin-bottom: 16px;
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(11, 110, 107, 0.16), rgba(217, 119, 6, 0.14));
  position: relative;
}

.feature-icon::before {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 4px;
  background: var(--brand);
  opacity: 0.85;
}

.feature-block h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.feature-block p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.scenarios {
  background:
    radial-gradient(circle at 10% 20%, rgba(11, 110, 107, 0.08), transparent 35%),
    var(--bg-alt);
}

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

.scenario-list article {
  padding: 28px 24px;
  border-left: 3px solid var(--brand);
  background: var(--surface);
}

.scenario-list h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.scenario-list p {
  margin: 0;
  color: var(--ink-soft);
}

.capability-stack {
  display: grid;
  gap: 18px;
}

.capability {
  padding: 28px 30px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}

.capability h2 {
  margin: 0 0 14px;
  font-size: 24px;
}

.capability ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.capability li {
  color: var(--ink-soft);
}

.capability strong {
  color: var(--ink);
}

.ecosystem {
  background:
    linear-gradient(145deg, #071a2b 0%, #0b4f4c 55%, #0a3a4a 100%);
  color: #fff;
}

.eco-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 28px;
}

.eco-grid div {
  padding: 24px 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
}

.eco-grid strong {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-size: 34px;
  color: #fbbf24;
}

.cert-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  align-items: center;
  justify-content: space-between;
  padding-top: 8px;
}

.cert-row p {
  margin: 0;
  max-width: 520px;
  color: rgba(255, 255, 255, 0.82);
}

.cert-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.cert-tags span {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.06);
  font-size: 13px;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 12px;
}

.timeline li {
  padding: 18px 14px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  min-height: 150px;
}

.timeline span {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--brand);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
}

.timeline h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.timeline p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.case-grid article {
  padding: 28px 24px;
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(11, 110, 107, 0.08), transparent 40%),
    var(--surface);
  border: 1px solid var(--line);
}

.case-grid h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.case-grid p {
  margin: 0;
  color: var(--ink-soft);
}

.cta-band {
  padding: 84px 0;
  background:
    radial-gradient(circle at 80% 20%, rgba(251, 191, 36, 0.18), transparent 28%),
    linear-gradient(120deg, #071a2b, #0b6e6b);
  color: #fff;
  text-align: center;
}

.cta-inner h2 {
  margin: 0 0 10px;
  font-size: clamp(28px, 3.5vw, 40px);
}

.cta-inner p {
  margin: 0 0 24px;
  color: rgba(255, 255, 255, 0.82);
}

.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.site-footer {
  background: #06131f;
  color: rgba(255, 255, 255, 0.78);
  padding: 56px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 24px;
  margin-bottom: 36px;
}

.footer-brand strong {
  display: block;
  margin-bottom: 8px;
  color: #fff;
  font-size: 20px;
  font-family: var(--font-display);
}

.footer-grid h4 {
  margin: 0 0 12px;
  color: #fff;
  font-size: 15px;
}

.footer-grid a,
.footer-grid p {
  display: block;
  margin: 0 0 8px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

.footer-bottom {
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Lead modal */
body.lead-open {
  overflow: hidden;
}

.lead-modal[hidden] {
  display: none !important;
}

.lead-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: grid;
  place-items: center;
  padding: 20px;
}

.lead-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(7, 26, 43, 0.55);
}

.lead-modal-panel {
  position: relative;
  width: min(480px, 100%);
  max-height: calc(100vh - 40px);
  overflow: auto;
  background: #fff;
  border-radius: 16px;
  padding: 28px 24px 24px;
  box-shadow: var(--shadow);
  z-index: 1;
}

.lead-modal-close {
  position: absolute;
  top: 10px;
  right: 14px;
  border: 0;
  background: transparent;
  font-size: 28px;
  line-height: 1;
  color: var(--ink-soft);
  cursor: pointer;
}

.lead-modal-panel h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--ink);
}

.lead-modal-desc {
  margin: 0 0 18px;
  color: var(--ink-soft);
  font-size: 14px;
}

#leadForm {
  display: grid;
  gap: 12px;
}

#leadForm label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-soft);
}

#leadForm label em {
  color: #c2410c;
  font-style: normal;
}

#leadForm input,
#leadForm textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 11px 12px;
  font: inherit;
  color: var(--ink);
  background: #fff;
}

#leadForm input:focus,
#leadForm textarea:focus {
  outline: 2px solid rgba(11, 110, 107, 0.25);
  border-color: var(--brand);
}

.lead-form-msg {
  margin: 0;
  font-size: 13px;
  color: var(--brand);
}

.lead-form-msg.is-error {
  color: #b91c1c;
}

.lead-submit {
  width: 100%;
  margin-top: 4px;
}

.lead-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

@keyframes heroIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes heroDrift {
  from {
    transform: scale(1.02) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.06) translate3d(-1.5%, -1%, 0);
  }
}

@media (max-width: 1024px) {
  .stats-grid,
  .solution-grid,
  .eco-grid,
  .timeline {
    grid-template-columns: repeat(2, 1fr);
  }

  .scenario-list,
  .case-grid,
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .header-inner {
    grid-template-columns: 1fr auto;
  }

  .site-nav,
  .header-actions {
    display: none;
  }

  .nav-toggle {
    display: inline-block;
  }

  body.nav-open .site-nav,
  body.nav-open .header-actions {
    display: flex;
  }

  body.nav-open .site-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 8px 16px 16px;
  }

  body.nav-open .site-nav a {
    padding: 12px 8px;
    border-bottom: 1px solid var(--line);
  }

  body.nav-open .header-actions {
    position: absolute;
    top: calc(72px + 240px);
    left: 0;
    right: 0;
    justify-content: stretch;
    padding: 0 16px 16px;
    background: #fff;
    border-bottom: 1px solid var(--line);
  }

  body.nav-open .header-actions .btn {
    flex: 1;
  }

  body.nav-open .nav-toggle span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  body.nav-open .nav-toggle span:nth-child(2) {
    opacity: 0;
  }

  body.nav-open .nav-toggle span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .hero-content {
    margin-left: 16px;
    margin-right: 16px;
    padding: 96px 0 72px;
  }

  .stats {
    margin-top: -28px;
  }
}

@media (max-width: 640px) {
  .stats-grid,
  .solution-grid,
  .scenario-list,
  .eco-grid,
  .timeline,
  .case-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 64px 0;
  }

  .stats-grid strong,
  .eco-grid strong {
    font-size: 28px;
  }

  .timeline li {
    min-height: auto;
  }

  .topbar-inner {
    gap: 8px;
  }
}