:root {
  --navy: #0f3470;
  --ink: #101b2c;
  --blue: #1765a7;
  --teal: #00a7c8;
  --gold: #f4c84d;
  --aqua: #e7f8fb;
  --mist: #f5f8fb;
  --line: #dbe7ee;
  --muted: #5d6c7d;
  --white: #ffffff;
  --shadow: 0 30px 90px rgba(15, 52, 112, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--white);
}

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

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

.concept-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 28px;
  align-items: center;
  min-height: 78px;
  padding: 12px clamp(18px, 5vw, 76px);
  border-bottom: 1px solid rgba(219, 231, 238, 0.9);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.logo-link img {
  width: 154px;
}

nav {
  display: flex;
  justify-content: center;
  gap: 34px;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 750;
}

.nav-action,
.primary-button,
form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border: 0;
  border-radius: 7px;
  color: var(--white);
  font-weight: 850;
  background: var(--navy);
  box-shadow: 0 16px 32px rgba(15, 52, 112, 0.22);
  cursor: pointer;
}

.nav-action {
  padding: 0 18px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(340px, 0.88fr);
  gap: clamp(42px, 6vw, 88px);
  align-items: center;
  min-height: calc(100vh - 78px);
  padding: clamp(70px, 9vw, 112px) clamp(18px, 5vw, 76px);
  background:
    radial-gradient(circle at 88% 18%, rgba(244, 200, 77, 0.2), transparent 22%),
    linear-gradient(115deg, #f7fbfc 0%, #e9f8fb 46%, #ffffff 46.2%, #ffffff 100%);
}

.kicker {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 24px;
  color: var(--navy);
  font-size: clamp(3rem, 6.2vw, 6.35rem);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  max-width: 780px;
  margin-bottom: 20px;
  color: var(--navy);
  font-size: clamp(2rem, 4.3vw, 4rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  color: var(--ink);
  font-size: 1.16rem;
}

.hero-copy > p:not(.kicker),
.method-copy > p,
.why-section > div > p,
.contact-section > div > p {
  max-width: 690px;
  color: #34465a;
  font-size: clamp(1.04rem, 1.5vw, 1.22rem);
  line-height: 1.72;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  margin-top: 34px;
}

.primary-button {
  padding: 0 24px;
}

.text-link {
  color: var(--navy);
  font-weight: 850;
  border-bottom: 2px solid var(--gold);
}

.system-board {
  position: relative;
  min-height: 570px;
  overflow: hidden;
  border: 1px solid rgba(219, 231, 238, 0.95);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.78)),
    repeating-linear-gradient(90deg, rgba(23, 101, 167, 0.07) 0 1px, transparent 1px 54px),
    repeating-linear-gradient(0deg, rgba(23, 101, 167, 0.07) 0 1px, transparent 1px 54px);
  box-shadow: var(--shadow);
}

.board-top {
  display: flex;
  justify-content: center;
  padding: 38px 26px 18px;
}

.board-top img {
  width: min(76%, 340px);
}

.board-flow {
  position: relative;
  min-height: 390px;
}

.flow-card {
  position: absolute;
  z-index: 2;
  width: 180px;
  min-height: 104px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 18px 45px rgba(15, 52, 112, 0.1);
}

.flow-card span {
  display: block;
  margin-bottom: 10px;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.flow-card strong {
  color: var(--navy);
  font-size: 1rem;
  line-height: 1.25;
}

.source {
  left: 8%;
  top: 116px;
}

.core {
  left: 50%;
  top: 68px;
  width: 204px;
  min-height: 132px;
  transform: translateX(-50%);
  border-color: rgba(0, 167, 200, 0.38);
}

.output {
  right: 8%;
  top: 174px;
}

.line,
.dot {
  position: absolute;
  display: block;
}

.line {
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--teal), var(--gold));
  opacity: 0.72;
  transform-origin: left center;
}

.line-a {
  left: 28%;
  top: 178px;
  width: 150px;
  transform: rotate(-22deg);
}

.line-b {
  right: 28%;
  top: 184px;
  width: 160px;
  transform: rotate(24deg);
}

.line-c {
  left: 47%;
  top: 210px;
  width: 145px;
  transform: rotate(82deg);
}

.dot {
  width: 22px;
  height: 22px;
  border: 5px solid var(--white);
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 14px 26px rgba(15, 52, 112, 0.18);
}

.dot-a {
  left: 32%;
  top: 156px;
  background: var(--teal);
}

.dot-b {
  right: 31%;
  top: 172px;
}

.dot-c {
  left: 53%;
  top: 304px;
  background: var(--blue);
}

.proof-strip,
.work-section,
.method-section,
.why-section,
.contact-section {
  padding: clamp(70px, 9vw, 118px) clamp(18px, 5vw, 76px);
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  padding-top: 0;
  padding-bottom: 0;
  background: var(--line);
}

.proof-strip div {
  min-height: 142px;
  padding: 30px;
  background: var(--white);
}

.proof-strip strong,
.proof-strip span {
  display: block;
}

.proof-strip strong {
  margin-bottom: 8px;
  color: var(--navy);
  font-size: 1.16rem;
}

.proof-strip span,
.work-grid p,
.method-list p,
.why-points p {
  color: var(--muted);
  line-height: 1.65;
}

.section-lead {
  margin-bottom: 42px;
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.work-grid article {
  min-height: 318px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.work-grid span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 58px;
  border-radius: 50%;
  color: var(--navy);
  font-weight: 950;
  background: rgba(244, 200, 77, 0.22);
}

.method-section {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(320px, 0.85fr);
  gap: clamp(36px, 7vw, 96px);
  background: var(--mist);
}

.method-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.method-list li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 26px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.method-list span {
  color: var(--teal);
  font-weight: 950;
}

.method-list p {
  margin: 0;
}

.why-section {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(320px, 1fr);
  gap: clamp(36px, 7vw, 96px);
}

.why-points {
  display: grid;
  gap: 18px;
}

.why-points article {
  padding: 24px;
  border-left: 4px solid var(--teal);
  background: var(--mist);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.74fr);
  gap: clamp(36px, 7vw, 96px);
  background:
    linear-gradient(135deg, rgba(15, 52, 112, 0.93), rgba(23, 101, 167, 0.92)),
    var(--navy);
}

.contact-section h2,
.contact-section .kicker,
.contact-section > div > p {
  color: var(--white);
}

form {
  display: grid;
  gap: 16px;
  padding: 30px;
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

label {
  display: grid;
  gap: 8px;
  color: var(--navy);
  font-size: 0.92rem;
  font-weight: 800;
}

input,
textarea {
  width: 100%;
  border: 1px solid #cfdde7;
  border-radius: 7px;
  padding: 13px 14px;
  color: var(--ink);
  font: inherit;
  background: #fbfdff;
}

textarea {
  resize: vertical;
}

form button {
  width: 100%;
  font: inherit;
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 30px clamp(18px, 5vw, 76px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

footer img {
  width: 220px;
}

footer p {
  margin: 0;
  font-weight: 800;
}

@media (max-width: 1060px) {
  .concept-header {
    grid-template-columns: auto auto;
  }

  nav {
    display: none;
  }

  .hero,
  .method-section,
  .why-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .work-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .concept-header {
    min-height: 70px;
    gap: 12px;
  }

  .logo-link img {
    width: 126px;
  }

  .nav-action {
    min-height: 40px;
    padding: 0 12px;
    font-size: 0.82rem;
  }

  .hero,
  .proof-strip,
  .work-section,
  .method-section,
  .why-section,
  .contact-section {
    padding: 58px 18px;
  }

  .hero {
    background:
      linear-gradient(180deg, #e9f8fb 0%, #f7fbfc 54%, #ffffff 54.2%, #ffffff 100%);
  }

  h1 {
    font-size: clamp(2.7rem, 13.5vw, 4.2rem);
  }

  h2 {
    font-size: clamp(2rem, 11vw, 3rem);
  }

  .actions {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-button {
    width: 100%;
    text-align: center;
  }

  .system-board {
    min-height: 520px;
  }

  .board-top img {
    width: 84%;
  }

  .flow-card {
    width: 156px;
    min-height: 96px;
  }

  .source {
    left: 6%;
    top: 118px;
  }

  .core {
    left: 50%;
    top: 238px;
    width: 178px;
  }

  .output {
    right: 6%;
    top: 360px;
  }

  .line-a {
    left: 30%;
    top: 222px;
    width: 112px;
    transform: rotate(55deg);
  }

  .line-b {
    right: 34%;
    top: 342px;
    width: 112px;
    transform: rotate(54deg);
  }

  .line-c,
  .dot-a,
  .dot-b,
  .dot-c {
    display: none;
  }

  .proof-strip,
  .work-grid {
    grid-template-columns: 1fr;
  }

  .method-list li {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  footer {
    display: grid;
  }
}