:root {
  --bg: #dfe8f0;
  --surface: #f3f7fb;
  --surface-strong: #ffffff;
  --surface-accent: #eef5fb;
  --text: #1a2538;
  --text-soft: #647287;
  --dark: #15274a;
  --dark-soft: #23385d;
  --blue: #1168c9;
  --blue-soft: #d8ebff;
  --mint: #dff6ea;
  --stroke: rgba(20, 37, 66, 0.1);
  --shadow-lg: 0 24px 60px rgba(43, 67, 111, 0.16);
  --shadow-md: 0 14px 28px rgba(41, 66, 107, 0.1);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --container: 1380px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: "Inter", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(162, 207, 255, 0.34), transparent 24%),
    linear-gradient(180deg, #e8eef4 0%, #dfe8f0 100%);
}

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

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

button,
input,
textarea {
  font: inherit;
}

.container {
  width: min(calc(100% - 40px), var(--container));
  margin: 0 auto;
}

.site-shell {
  min-height: 100vh;
}

.section-full {
  width: 100%;
  padding: 44px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand__mark {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: #fff;
  background: radial-gradient(circle at 30% 30%, #79dbff, #3768ff 58%, #15274a 100%);
  box-shadow: 0 8px 20px rgba(25, 77, 177, 0.28);
}

.brand__text {
  text-transform: lowercase;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  padding: 20px 0 0;
}

.topbar__inner {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--surface-strong);
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  justify-content: center;
  gap: 22px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-soft);
}

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

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

.search-chip {
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 999px;
  background: #eff4fa;
  color: var(--dark);
  font-size: 18px;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: #edf4ff;
  color: var(--dark);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
  border-radius: 999px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 999px;
  border: 0;
  font-weight: 700;
  transition: transform 160ms ease, opacity 160ms ease;
}

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

.button--full {
  width: 100%;
}

.button--small {
  min-height: 36px;
  padding-inline: 16px;
  font-size: 12px;
}

.button--dark {
  color: #fff;
  background: var(--dark);
}

.button--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--dark) 0%, #284774 100%);
}

.button--ghost {
  color: var(--dark);
  background: #fff;
  border: 1px solid rgba(20, 37, 66, 0.1);
}

.button--accent {
  color: var(--dark);
  background: linear-gradient(135deg, #ddf7e9 0%, #b7f1d1 100%);
}

.button--full {
  width: 100%;
}

.hero {
  padding-top: 26px;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 28px;
  align-items: center;
  padding: 38px 42px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  background: rgba(247, 250, 253, 0.86);
  border-radius: 34px;
  box-shadow: var(--shadow-lg);
}

.hero__copy h1 {
  margin: 18px 0 16px;
  max-width: 620px;
  font-size: clamp(40px, 4.5vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.06em;
  text-transform: uppercase;
}

.eyebrow {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(17, 104, 201, 0.08);
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero__lead {
  max-width: 430px;
  margin: 0;
  color: var(--text-soft);
  line-height: 1.55;
  font-size: 15px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.trusted-bar {
  margin-top: 26px;
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.trusted-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 12px;
  font-size: 13px;
  color: #a1abba;
  text-transform: none;
}

.hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__visual-card {
  width: 100%;
  max-width: 420px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(235, 244, 252, 0.94) 100%);
  box-shadow: var(--shadow-md);
}

.section-soft {
  background: rgba(244, 248, 252, 0.62);
}

.section-heading {
  margin-bottom: 22px;
}

.section-heading p {
  max-width: 820px;
  margin: 10px 0 0;
  color: var(--text-soft);
  line-height: 1.65;
}

.section-heading--left {
  text-align: left;
}

.section-heading--split {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.05;
  letter-spacing: -0.05em;
  text-transform: uppercase;
}

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

.promo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.promo-card,
.service-tile,
.solution-card,
.platform-card,
.stat-card,
.value-card,
.prose-card {
  border: 1px solid var(--stroke);
  background: var(--surface-strong);
  border-radius: 18px;
  box-shadow: var(--shadow-md);
}

.promo-card {
  padding: 20px;
}

.promo-card__tag {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.promo-card h3,
.solution-card h3,
.value-card h3,
.prose-card h3 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.promo-card p,
.solution-card p,
.value-card p,
.prose-card p,
.platform-card p,
.platform-list li,
.stat-card span {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.6;
}

.promo-card a {
  display: inline-flex;
  margin-top: 14px;
  color: var(--dark);
  font-weight: 700;
}

.project-card,
.review-mini,
.material-card,
.advantage-item,
.faq-item {
  border: 1px solid var(--stroke);
  background: var(--surface-strong);
  border-radius: 18px;
  box-shadow: var(--shadow-md);
}

.service-tile {
  padding: 18px;
  border: 1px solid var(--stroke);
  background: var(--surface-strong);
  border-radius: 18px;
  box-shadow: var(--shadow-md);
}

.service-tile--accent {
  background: linear-gradient(180deg, var(--mint) 0%, #f7fbf9 100%);
}

.icon-badge {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 14px;
  border-radius: 14px;
  background: linear-gradient(180deg, #293b60 0%, #162747 100%);
  color: #fff;
  font-weight: 800;
  font-size: 12px;
}

.service-tile h3,
.mini-card h3,
.project-card h3,
.material-card h3,
.advantage-item h3 {
  margin: 0 0 8px;
  font-size: 22px;
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.service-tile p,
.project-card p,
.material-card p,
.advantage-item p,
.review-mini p,
.faq-item p,
.contact-box p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.55;
  font-size: 14px;
}

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

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

.solution-card {
  padding: 22px;
}

.solution-card--accent {
  background: linear-gradient(180deg, #e9f3ff 0%, #ffffff 100%);
}

.platform-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 20px;
}

.platform-card {
  padding: 26px;
  background: linear-gradient(180deg, rgba(22, 51, 92, 0.98) 0%, rgba(15, 36, 69, 0.98) 100%);
  color: #fff;
}

.platform-card h2 {
  margin: 14px 0 16px;
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1.05;
  letter-spacing: -0.05em;
}

.platform-card p,
.platform-card .eyebrow {
  color: rgba(255, 255, 255, 0.86);
}

.platform-list {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.platform-list li {
  position: relative;
  padding-left: 18px;
}

.platform-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #9ff1ca;
}

.platform-side {
  display: grid;
  gap: 16px;
}

.stat-card {
  display: grid;
  align-content: center;
  min-height: 140px;
  padding: 20px;
}

.stat-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--dark);
  font-size: 44px;
  line-height: 1;
  letter-spacing: -0.06em;
}

.advantage-item {
  padding: 18px;
  background: rgba(255, 255, 255, 0.72);
}

.advantage-item__icon {
  display: inline-flex;
  margin-bottom: 14px;
  color: #9fc6da;
  font-size: 24px;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.case-tags span {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.9);
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 700;
}

.project-card {
  overflow: hidden;
}

.project-card__preview {
  min-height: 118px;
  background-size: cover;
  background-position: center;
}

.project-card__preview--blue {
  background:
    linear-gradient(135deg, rgba(12, 103, 201, 0.88), rgba(132, 210, 255, 0.35)),
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.9), transparent 24%),
    linear-gradient(120deg, #2c7fe2, #dff1ff);
}

.project-card__preview--dark {
  background:
    radial-gradient(circle at 65% 40%, rgba(135, 237, 255, 0.8), transparent 18%),
    linear-gradient(135deg, #193662, #0f1f3c 62%, #182f55);
}

.project-card__preview--light {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(215, 228, 242, 0.95)),
    linear-gradient(120deg, #8fa1b9, #f6f8fb);
}

.project-card__preview--steel {
  background:
    linear-gradient(145deg, rgba(95, 121, 165, 0.25), rgba(255, 255, 255, 0.95)),
    linear-gradient(120deg, #8294ae, #dfe8f2);
}

.project-card__body {
  padding: 14px;
}

.project-card__body h3 {
  font-size: 14px;
  text-transform: uppercase;
}

.project-card__body strong {
  display: block;
  margin-top: 10px;
  color: #169c66;
  font-size: 22px;
  letter-spacing: -0.04em;
}

.section-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

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

.faq-item {
  padding: 0 14px;
  background: rgba(255, 255, 255, 0.86);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 0;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  color: var(--blue);
  font-size: 18px;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  padding-bottom: 14px;
  font-size: 13px;
}

.review-mini-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.review-mini {
  padding: 12px;
  min-height: 136px;
}

.review-mini__avatar {
  width: 26px;
  height: 26px;
  margin-bottom: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, #dfe8f6, #b6c8e4);
}

.review-mini strong {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
}

.review-mini span {
  display: block;
  margin-top: 10px;
  color: #f6b400;
  font-size: 12px;
  letter-spacing: 0.16em;
}

.material-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.value-grid,
.competency-grid,
.prose-grid {
  display: grid;
  gap: 16px;
}

.value-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.value-card {
  padding: 20px;
}

.competency-grid {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.competency-grid span {
  display: grid;
  place-items: center;
  min-height: 72px;
  padding: 12px;
  border: 1px solid var(--stroke);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-md);
  color: var(--dark);
  font-weight: 700;
}

.prose-block {
  padding-top: 8px;
}

.prose-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.prose-card {
  padding: 20px;
}

.material-card {
  padding: 12px;
}

.material-card__thumb {
  min-height: 92px;
  margin-bottom: 10px;
  border-radius: 12px;
}

.material-card__thumb--blue {
  background:
    radial-gradient(circle at 28% 38%, rgba(85, 201, 255, 0.85), transparent 18%),
    linear-gradient(135deg, #103267, #1a5ec4 60%, #77d9ff);
}

.material-card__thumb--indigo {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.1), transparent),
    linear-gradient(135deg, #0f2449, #21498d 60%, #79c4ff);
}

.material-card__thumb--steel {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.25), transparent),
    linear-gradient(135deg, #56657d, #b4c1d0 70%, #f5f7fa);
}

.material-card h3 {
  font-size: 13px;
  text-transform: uppercase;
}

.material-card p {
  font-size: 12px;
}

.contact-box {
  padding: 32px;
  border-radius: 30px;
  background: linear-gradient(180deg, #16335c 0%, #0f2445 100%);
  color: #fff;
  box-shadow: var(--shadow-lg);
}

.contact-box__copy h2 {
  margin: 0 0 8px;
  font-size: 34px;
  line-height: 1.02;
  letter-spacing: -0.05em;
  text-transform: uppercase;
}

.contact-box__copy p {
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.6;
}

.contact-form {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.contact-form__row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.contact-form label {
  display: grid;
  gap: 6px;
}

.contact-form span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--text);
  outline: none;
}

.contact-meta {
  display: grid;
  gap: 8px;
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 13px;
}

.footer {
  padding: 46px 0 50px;
  background: #eef4f8;
  border-top: 1px solid rgba(20, 37, 66, 0.08);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
  gap: 22px;
}

.footer__brand p {
  margin: 14px 0 0;
  color: var(--text-soft);
  line-height: 1.65;
}

.footer__column {
  display: grid;
  align-content: start;
  gap: 10px;
}

.footer__column h3 {
  margin: 0 0 6px;
  font-size: 15px;
  text-transform: uppercase;
}

.footer__column a,
.footer__column span {
  color: var(--text-soft);
  line-height: 1.5;
}

@media (max-width: 1080px) {
  .hero__grid,
  .promo-grid,
  .service-grid,
  .advantage-row,
  .solution-grid,
  .case-grid,
  .material-grid,
  .value-grid,
  .competency-grid,
  .prose-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section-columns,
  .review-mini-grid,
  .platform-grid,
  .footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .container {
    width: min(calc(100% - 20px), var(--container));
  }

  .topbar__inner {
    grid-template-columns: auto auto auto;
  }

  .nav-toggle {
    display: block;
    justify-self: end;
  }

  .nav {
    position: absolute;
    inset: calc(100% + 10px) 0 auto;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: 16px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
  }

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

  .topbar__actions {
    justify-self: end;
  }

  .search-chip,
  .topbar__actions .button {
    display: none;
  }

  .hero__grid,
  .promo-grid,
  .service-grid,
  .advantage-row,
  .solution-grid,
  .case-grid,
  .material-grid,
  .review-mini-grid,
  .contact-form__row,
  .section-columns,
  .platform-grid,
  .value-grid,
  .competency-grid,
  .prose-grid,
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .hero__grid {
    padding: 24px;
  }

  .section-heading--split {
    display: block;
  }

  .hero__copy h1 {
    font-size: 38px;
  }
}