:root {
  --abyss: #021018;
  --navy: #062236;
  --reef: #0b4255;
  --teal: #16c7c1;
  --aqua: #8af6ff;
  --gold: #f7c64a;
  --gold-2: #ffe8a1;
  --ink: #f4fbff;
  --muted: #b8d0d8;
  --line: rgba(138, 246, 255, .18);
  --panel: rgba(5, 28, 43, .82);
  --radius: 8px;
  --shadow: 0 24px 80px rgba(0, 0, 0, .38);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Tahoma, "Noto Sans Thai", Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 8%, rgba(22, 199, 193, .18), transparent 28rem),
    radial-gradient(circle at 84% 4%, rgba(247, 198, 74, .14), transparent 24rem),
    linear-gradient(180deg, #03131d 0%, #020b12 48%, #01070c 100%);
  line-height: 1.75;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .16;
  background-image:
    linear-gradient(rgba(138, 246, 255, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(138, 246, 255, .08) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(180deg, black, transparent 78%);
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line);
  background: rgba(2, 16, 24, .82);
  backdrop-filter: blur(18px);
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 150px;
  font-weight: 900;
}

.brand img {
  width: 63px;
  height: 76px;
}

.brand span {
  color: var(--gold-2);
  font-size: 22px;
}

.nav-links {
  flex: 1;
  display: flex;
  justify-content: center;
  gap: 6px;
}

.nav-links a {
  padding: 10px 12px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 800;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--gold-2);
}

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

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  background: rgba(255, 255, 255, .06);
  font-size: 24px;
}

.btn {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 900;
  line-height: 1.2;
}

.btn-primary {
  color: #10210d;
  background: linear-gradient(135deg, var(--gold-2), var(--gold) 58%, #6fffcb);
  box-shadow: 0 12px 32px rgba(247, 198, 74, .22);
}

.btn-secondary {
  color: var(--ink);
  border-color: rgba(138, 246, 255, .3);
  background: rgba(255, 255, 255, .06);
}

.btn-line {
  color: #02130b;
  background: linear-gradient(135deg, #98ff99, #26d86b);
}

.hero {
  position: relative;
  min-height: calc(100vh - 76px);
  display: grid;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .44;
  filter: saturate(1.14) contrast(1.1);
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(2, 16, 24, .96), rgba(2, 16, 24, .54), rgba(2, 16, 24, .84)),
    linear-gradient(180deg, transparent, rgba(1, 7, 12, .92));
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr);
  gap: 42px;
  align-items: center;
  padding: 70px 0 92px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--aqua);
  font-weight: 900;
}

.eyebrow::before {
  content: "";
  width: 44px;
  height: 2px;
  background: linear-gradient(90deg, var(--aqua), var(--gold));
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.22;
  letter-spacing: 0;
}

h1 {
  max-width: 880px;
  font-size: clamp(38px, 5.8vw, 72px);
  text-shadow: 0 10px 34px rgba(0, 0, 0, .55);
}

h2 {
  font-size: clamp(28px, 3.3vw, 44px);
}

h3 {
  font-size: 21px;
}

p {
  margin: 0;
  color: var(--muted);
}

.lead {
  max-width: 760px;
  margin-top: 18px;
  color: #e3f7fb;
  font-size: 19px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.radar {
  position: relative;
  min-height: 430px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    repeating-radial-gradient(circle, rgba(138, 246, 255, .12) 0 1px, transparent 1px 42px),
    linear-gradient(145deg, rgba(22, 199, 193, .14), rgba(247, 198, 74, .08));
  box-shadow: var(--shadow);
}

.radar::before {
  content: "";
  position: absolute;
  width: 130%;
  height: 130%;
  background: conic-gradient(from 210deg, transparent 0 74%, rgba(138, 246, 255, .24), transparent 86%);
  animation: scan 9s linear infinite;
}

.radar img {
  position: relative;
  z-index: 1;
  width: 112px;
  height: auto;
  filter: drop-shadow(0 18px 34px rgba(0, 0, 0, .65));
}

@keyframes scan {
  to {
    transform: rotate(360deg);
  }
}

.section {
  padding: 76px 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  margin-bottom: 30px;
}

.section-head p {
  max-width: 620px;
}

.feature-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255, 255, 255, .04);
}

.feature {
  min-height: 210px;
  padding: 24px;
  border-right: 1px solid var(--line);
}

.feature:last-child {
  border-right: 0;
}

.feature .number {
  color: var(--gold-2);
  font-size: 34px;
  font-weight: 900;
}

.wave-band {
  background:
    linear-gradient(120deg, rgba(22, 199, 193, .18), rgba(247, 198, 74, .1), rgba(5, 28, 43, .78)),
    rgba(255, 255, 255, .03);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.split {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: 30px;
  align-items: center;
}

.photo-mosaic {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.photo-mosaic img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.photo-mosaic img:last-child {
  margin-top: 28px;
}

.sonar-list {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.sonar-item {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 16px;
  align-items: start;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(2, 16, 24, .48);
}

.sonar-dot {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--gold-2);
  border: 1px solid rgba(247, 198, 74, .4);
  background: rgba(247, 198, 74, .1);
  font-weight: 900;
}

.page-hero {
  padding: 72px 0 54px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(120deg, rgba(22, 199, 193, .16), rgba(247, 198, 74, .09)),
    rgba(255, 255, 255, .03);
}

.page-hero h1 {
  font-size: clamp(34px, 5vw, 58px);
}

.breadcrumbs {
  margin-bottom: 14px;
  color: var(--gold-2);
  font-weight: 900;
}

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

.blog-card,
.promo-card,
.contact-card,
.article-body,
.seo-box {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(255, 255, 255, .08), rgba(255, 255, 255, .03));
  box-shadow: 0 18px 56px rgba(0, 0, 0, .25);
}

.blog-card {
  overflow: hidden;
}

.blog-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.blog-card-content {
  padding: 18px;
}

.blog-card h3 {
  min-height: 58px;
  font-size: 19px;
}

.blog-card p {
  margin-top: 10px;
}

.card-link {
  display: inline-flex;
  margin-top: 16px;
  color: var(--gold-2);
  font-weight: 900;
}

.promo-card,
.contact-card,
.seo-box {
  padding: 24px;
}

.promo-card strong,
.contact-card strong {
  display: block;
  margin: 12px 0;
  color: var(--gold-2);
  font-size: 30px;
  line-height: 1.25;
}

.article-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 24px;
  align-items: start;
}

.article-body {
  overflow: hidden;
}

.article-body > img {
  width: 100%;
  aspect-ratio: 16 / 8;
  object-fit: cover;
}

.article-content {
  padding: 28px;
}

.article-content h2,
.article-content h3 {
  margin-top: 28px;
}

.article-content p,
.article-content ul {
  margin-top: 12px;
  color: var(--muted);
}

.article-content li {
  margin: 6px 0;
}

.side-box {
  position: sticky;
  top: 96px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(2, 16, 24, .88);
}

.side-box a {
  display: block;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.side-box a:last-child {
  border-bottom: 0;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.site-footer {
  padding: 38px 0;
  border-top: 1px solid var(--line);
  background: #01070c;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr .8fr;
  gap: 26px;
}

.footer-logo {
  width: 63px;
  height: 76px;
  margin-bottom: 12px;
}

.footer-links {
  display: grid;
  gap: 8px;
}

.footer-links a {
  color: var(--muted);
}

.copyright {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: #86a6b1;
  font-size: 14px;
}

@media (max-width: 980px) {
  .nav {
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 10px 0;
  }

  .menu-toggle {
    display: inline-grid;
    place-items: center;
  }

  .nav-links,
  .nav-actions {
    display: none;
    width: 100%;
  }

  .nav.open .nav-links,
  .nav.open .nav-actions {
    display: grid;
  }

  .nav-links {
    order: 3;
    gap: 0;
  }

  .nav-links a {
    border-top: 1px solid var(--line);
  }

  .nav-actions {
    order: 4;
    grid-template-columns: 1fr 1fr;
  }

  .hero-inner,
  .split,
  .article-shell,
  .contact-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .feature-strip,
  .blog-grid,
  .promo-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .side-box {
    position: static;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 22px, 1180px);
  }

  .brand span {
    font-size: 19px;
  }

  .hero {
    min-height: auto;
  }

  .hero-inner {
    padding: 44px 0 62px;
  }

  h1 {
    font-size: 34px;
  }

  .lead {
    font-size: 17px;
  }

  .feature-strip,
  .blog-grid,
  .promo-grid {
    grid-template-columns: 1fr;
  }

  .feature {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .feature:last-child {
    border-bottom: 0;
  }

  .section {
    padding: 52px 0;
  }

  .section-head {
    display: grid;
  }

  .photo-mosaic img:last-child {
    margin-top: 0;
  }

  .article-content {
    padding: 20px;
  }
}