:root {
  --navy: #062451;
  --navy-2: #021b42;
  --navy-3: #0d356f;
  --ink: #09254c;
  --muted: #66758d;
  --line: #d9e0ea;
  --line-dark: rgba(255, 255, 255, .28);
  --paper: #ffffff;
  --soft: #f6f8fb;
  --soft-blue: #eef4fb;
  --max: 1180px;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: 16px;
  line-height: 1.9;
  letter-spacing: .02em;
}

img,
svg {
  max-width: 100%;
}

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

button {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .88);
  border-bottom: 1px solid rgba(217, 224, 234, .78);
  backdrop-filter: blur(18px);
}

.container {
  width: min(100% - 48px, var(--max));
  margin-inline: auto;
}

.header-inner {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  width: 182px;
  flex: 0 0 auto;
}

.brand img {
  display: block;
  width: 100%;
  height: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.5vw, 38px);
  color: var(--navy);
  font-size: 14px;
  font-weight: 700;
}

.nav a {
  position: relative;
  padding: 8px 0;
  transition: opacity .2s ease;
}

.nav a:hover {
  opacity: .64;
}

.nav a.is-current::after {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: -12px;
  height: 1px;
  background: var(--navy);
}

.nav .button {
  padding: 0 28px;
}

.nav .button::after {
  display: none;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: white;
  color: var(--navy);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.menu-button span,
.menu-button::before,
.menu-button::after {
  content: "";
  display: block;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  position: absolute;
  transition: transform .2s ease, opacity .2s ease;
}

.menu-button span {
  transform: translateY(0);
}

.menu-button::before {
  transform: translateY(-6px);
}

.menu-button::after {
  transform: translateY(6px);
}

.menu-button[aria-expanded="true"] span {
  opacity: 0;
}

.menu-button[aria-expanded="true"]::before {
  transform: rotate(42deg);
}

.menu-button[aria-expanded="true"]::after {
  transform: rotate(-42deg);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 28px;
  border: 1px solid var(--navy);
  border-radius: 999px;
  background: var(--navy);
  color: white;
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  transition: transform .2s ease, background .2s ease, color .2s ease;
}

.button:hover {
  transform: translateY(-1px);
  background: var(--navy-2);
}

.button-outline {
  background: transparent;
  color: var(--navy);
}

.button-outline:hover {
  background: var(--navy);
  color: white;
}

.button .arrow {
  margin-left: 14px;
  font-size: 17px;
  line-height: 1;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 690px;
  display: grid;
  align-items: center;
  padding: 78px 0 96px;
  background:
    radial-gradient(circle at 78% 46%, rgba(6, 36, 81, .09), transparent 34%),
    linear-gradient(135deg, #fff 0%, #fff 42%, #f5f8fc 100%);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 12% -12% auto auto;
  width: 58%;
  height: 70%;
  background:
    linear-gradient(140deg, transparent 0 45%, rgba(6, 36, 81, .08) 46%, transparent 52%),
    linear-gradient(148deg, transparent 0 58%, rgba(6, 36, 81, .055) 59%, transparent 64%),
    linear-gradient(156deg, transparent 0 70%, rgba(6, 36, 81, .045) 71%, transparent 76%);
  transform: rotate(-8deg);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(520px, 1.12fr) minmax(300px, .88fr);
  align-items: center;
  gap: 42px;
}

.hero-copy {
  max-width: 720px;
}

.eyebrow {
  display: block;
  color: var(--navy);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .18em;
  line-height: 1.4;
  text-transform: uppercase;
}

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

h1 {
  margin-top: 28px;
  color: var(--navy);
  font-family: Georgia, "Times New Roman", "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-size: clamp(30px, 2.55vw, 39px);
  font-weight: 500;
  line-height: 1.62;
  letter-spacing: .04em;
}

h1 span {
  display: block;
  white-space: nowrap;
}

.lead {
  margin-top: 30px;
  max-width: 690px;
  color: var(--ink);
  font-weight: 600;
  line-height: 2.15;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 44px;
}

.hero-visual {
  position: relative;
  min-height: 410px;
  display: grid;
  place-items: center;
}

.hero-visual img {
  width: min(55%, 360px);
  filter: drop-shadow(0 18px 28px rgba(6, 36, 81, .10));
  opacity: .96;
  animation: floatSymbol 7s ease-in-out infinite;
}

@keyframes floatSymbol {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.section {
  padding: 88px 0;
}

.section-title {
  margin-bottom: 34px;
}

.section-title h2 {
  margin-top: 14px;
  color: var(--navy);
  font-family: Georgia, "Times New Roman", "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: .05em;
}

.section-title p {
  margin-top: 18px;
  color: var(--muted);
  max-width: 680px;
}

.vision {
  background:
    radial-gradient(circle at 18% 18%, rgba(35, 82, 153, .45), transparent 30%),
    linear-gradient(135deg, #031a3d 0%, #062451 52%, #031838 100%);
  color: white;
}

.vision-grid {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(420px, 1.08fr);
  gap: 58px;
  align-items: center;
}

.vision .eyebrow,
.vision h2,
.vision p {
  color: white;
}

.vision-copy p {
  margin-top: 26px;
  color: rgba(255, 255, 255, .86);
  line-height: 2.25;
}

.vision-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-left: 1px solid var(--line-dark);
}

.vision-point {
  min-height: 210px;
  padding: 20px 26px;
  display: grid;
  align-content: center;
  justify-items: center;
  text-align: center;
  border-right: 1px solid var(--line-dark);
}

.icon {
  width: 58px;
  height: 58px;
  margin-bottom: 22px;
  color: currentColor;
}

.vision-point h3,
.card h3,
.work-card h3 {
  color: inherit;
  font-size: 18px;
  line-height: 1.55;
}

.vision-point p {
  margin-top: 10px;
  color: rgba(255, 255, 255, .76);
  font-size: 13px;
  line-height: 1.75;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px 24px;
}

.card {
  min-height: 196px;
  padding: 28px 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
  text-align: center;
  transition: transform .2s ease, border-color .2s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(6, 36, 81, .42);
}

.card .icon {
  width: 46px;
  height: 46px;
  margin: 0 auto 18px;
  color: var(--navy);
}

.card p {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
}

.center-action {
  display: flex;
  justify-content: center;
  margin-top: 32px;
}

.works {
  background: linear-gradient(180deg, #fff 0%, #f8fafc 100%);
}

.works-head {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 26px;
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}

.work-card {
  min-width: 0;
}

.work-thumb {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  border: 1px solid rgba(217, 224, 234, .9);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(2, 27, 66, .94), rgba(8, 47, 104, .74));
  position: relative;
}

.work-thumb::before,
.work-thumb::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.work-thumb::after {
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(2, 18, 43, .25));
}

.work-thumb-media {
  background:
    linear-gradient(135deg, rgba(2, 18, 43, .92), rgba(8, 52, 105, .62)),
    repeating-linear-gradient(90deg, transparent 0 26px, rgba(255,255,255,.06) 27px 28px);
}

.work-thumb-media::before {
  left: 12%;
  right: 10%;
  bottom: 18%;
  height: 46%;
  border-left: 1px solid rgba(255,255,255,.25);
  border-bottom: 1px solid rgba(255,255,255,.25);
  background:
    linear-gradient(135deg, transparent 0 14%, rgba(111,174,232,.9) 15% 17%, transparent 18% 32%, rgba(255,255,255,.7) 33% 35%, transparent 36% 52%, rgba(111,174,232,.8) 53% 55%, transparent 56%);
}

.work-thumb-document {
  background:
    linear-gradient(135deg, rgba(255,255,255,.9), rgba(214, 226, 240, .86)),
    radial-gradient(circle at 28% 72%, rgba(6,36,81,.13), transparent 22%);
}

.work-thumb-document::before {
  inset: 17% 13%;
  background:
    radial-gradient(circle at 22% 44%, transparent 0 14px, rgba(6,36,81,.28) 15px 16px, transparent 17px),
    radial-gradient(circle at 61% 34%, transparent 0 18px, rgba(6,36,81,.18) 19px 20px, transparent 21px),
    linear-gradient(90deg, rgba(6,36,81,.16) 0 42%, transparent 42% 50%, rgba(6,36,81,.2) 50% 100%);
  opacity: .8;
}

.work-thumb-campaign {
  background:
    radial-gradient(circle at 50% 62%, rgba(255,255,255,.9), transparent 4%),
    radial-gradient(circle at 20% 30%, rgba(255,255,255,.35), transparent 2%),
    radial-gradient(circle at 76% 22%, rgba(255,255,255,.35), transparent 2%),
    linear-gradient(135deg, #0d315f, #d9e8fb 48%, #142b55);
}

.work-thumb-campaign::before {
  inset: 16% 8% 0;
  background:
    radial-gradient(ellipse at 50% 85%, rgba(255,255,255,.85), transparent 38%),
    repeating-linear-gradient(88deg, transparent 0 16px, rgba(255,255,255,.32) 17px 18px);
  opacity: .8;
}

.work-thumb-research {
  background: linear-gradient(135deg, #eef4fb, #bccce0);
}

.work-thumb-research::before {
  inset: 18% 14%;
  border-left: 1px solid rgba(6,36,81,.26);
  border-bottom: 1px solid rgba(6,36,81,.26);
  background:
    linear-gradient(90deg, transparent 0 16%, rgba(6,36,81,.42) 16% 19%, transparent 19% 34%, rgba(6,36,81,.34) 34% 37%, transparent 37% 54%, rgba(6,36,81,.52) 54% 57%, transparent 57% 75%, rgba(6,36,81,.3) 75% 78%, transparent 78%),
    linear-gradient(16deg, transparent 0 44%, rgba(6,36,81,.5) 45% 47%, transparent 48%);
}

.work-thumb-dashboard {
  background:
    linear-gradient(135deg, rgba(2, 18, 43, .97), rgba(13, 53, 111, .88));
}

.work-thumb-dashboard::before {
  inset: 14%;
  background:
    linear-gradient(rgba(255,255,255,.18), rgba(255,255,255,.18)) 0 0 / 100% 1px no-repeat,
    linear-gradient(rgba(255,255,255,.16), rgba(255,255,255,.16)) 0 50% / 100% 1px no-repeat,
    linear-gradient(90deg, rgba(111,174,232,.72) 0 18%, transparent 18% 28%, rgba(255,255,255,.42) 28% 45%, transparent 45% 55%, rgba(111,174,232,.58) 55% 100%);
  border: 1px solid rgba(255,255,255,.16);
}

.work-card h3 {
  margin-top: 16px;
  color: var(--navy);
  font-size: 15px;
}

.work-card p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.text-link {
  display: inline-flex;
  align-items: center;
  color: var(--navy);
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.text-link .arrow {
  margin-left: 12px;
}

.works-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
}

.works-dots span {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: #d9e0ea;
}

.works-dots .is-active {
  background: var(--navy);
}

.about {
  padding: 0;
  background: var(--navy);
  color: white;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 1fr);
  min-height: 360px;
}

.about-copy {
  padding: 74px max(48px, calc((100vw - var(--max)) / 2)) 74px 0;
  margin-left: max(24px, calc((100vw - var(--max)) / 2));
  display: grid;
  align-content: center;
}

.about-copy .eyebrow,
.about-copy h2,
.about-copy p {
  color: white;
}

.about-copy p {
  margin-top: 22px;
  color: rgba(255, 255, 255, .82);
}

.about-copy .button {
  width: fit-content;
  margin-top: 34px;
  border-color: white;
}

.about-visual {
  min-height: 360px;
  background:
    linear-gradient(90deg, rgba(255,255,255,.96), rgba(255,255,255,.58)),
    linear-gradient(135deg, #e9eff6, #ffffff 44%, #d7e1ee);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.office-panel {
  width: min(78%, 420px);
  padding: 46px;
  border: 1px solid rgba(6, 36, 81, .16);
  background: rgba(255, 255, 255, .62);
  backdrop-filter: blur(10px);
}

.office-panel img {
  display: block;
  width: min(100%, 260px);
}

.office-lines {
  margin-top: 34px;
  display: grid;
  gap: 12px;
}

.office-lines span {
  display: block;
  height: 1px;
  background: rgba(6, 36, 81, .18);
}

.contact {
  background: white;
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 36px;
  align-items: center;
  padding: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, #fff 0%, var(--soft) 100%);
}

.contact-panel h2 {
  color: var(--navy);
  font-family: Georgia, "Times New Roman", "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-weight: 500;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.55;
}

.contact-panel p {
  margin-top: 12px;
  color: var(--muted);
}

.footer {
  border-top: 0;
  padding: 54px 0 26px;
  background:
    radial-gradient(circle at 12% 10%, rgba(255,255,255,.08), transparent 28%),
    linear-gradient(135deg, #031a3d 0%, #062451 58%, #031838 100%);
  color: white;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr repeat(3, 1fr) auto;
  gap: 38px;
  align-items: start;
}

.footer-brand img {
  width: 182px;
}

.footer-brand p {
  margin-top: 18px;
  color: rgba(255,255,255,.82);
  font-size: 13px;
  line-height: 1.85;
}

.footer-nav strong {
  display: block;
  margin-bottom: 12px;
  color: white;
  font-size: 13px;
}

.footer-nav a {
  display: block;
  margin-top: 8px;
  color: rgba(255,255,255,.68);
  font-size: 13px;
}

.footer-cta {
  display: grid;
  gap: 12px;
  min-width: 210px;
}

.copyright {
  margin-top: 48px;
  color: rgba(255,255,255,.56);
  font-size: 12px;
  text-align: center;
}

.footer .button {
  border-color: white;
  background: white;
  color: var(--navy);
}

.footer .button-outline {
  background: transparent;
  color: white;
}

@media (max-width: 1040px) {
  .header-inner {
    min-height: 82px;
  }

  .nav {
    gap: 20px;
    font-size: 13px;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid,
  .vision-grid,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 300px;
  }

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

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

  .about-copy {
    margin: 0;
    padding: 74px 48px;
  }

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

@media (max-width: 820px) {
  .container {
    width: min(100% - 32px, var(--max));
  }

  .menu-button {
    position: relative;
    display: inline-flex;
  }

  .nav {
    position: fixed;
    inset: 82px 0 auto 0;
    display: grid;
    gap: 0;
    padding: 12px 24px 24px;
    background: rgba(255, 255, 255, .96);
    border-bottom: 1px solid var(--line);
    transform: translateY(-18px);
    opacity: 0;
    pointer-events: none;
    transition: transform .2s ease, opacity .2s ease;
  }

  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav a {
    padding: 14px 0;
    border-bottom: 1px solid rgba(217, 224, 234, .72);
  }

  .nav a.is-current::after {
    display: none;
  }

  .nav .button {
    margin-top: 16px;
  }

  .hero {
    padding: 54px 0 74px;
  }

  .lead {
    font-size: 15px;
  }

  .lead br {
    display: none;
  }

  .section {
    padding: 72px 0;
  }

  .vision-points {
    grid-template-columns: 1fr;
    border-left: 0;
    border-top: 1px solid var(--line-dark);
  }

  .vision-point {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line-dark);
  }

  .works-head,
  .contact-panel {
    display: block;
  }

  .works-head .button {
    margin-top: 22px;
  }

  .contact-panel .button {
    margin-top: 26px;
  }
}

@media (max-width: 600px) {
  body {
    font-size: 15px;
  }

  .brand {
    width: 150px;
  }

  .hero-grid {
    gap: 24px;
  }

  h1 span {
    white-space: normal;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .hero-actions {
    gap: 12px;
  }

  .hero-visual {
    min-height: 220px;
  }

  .hero-visual img {
    width: min(46%, 220px);
  }

  .card-grid,
  .work-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .card {
    min-height: auto;
  }

  .contact-panel {
    padding: 28px 22px;
  }

  .about-copy {
    padding: 62px 24px;
  }

  .office-panel {
    width: min(88%, 360px);
    padding: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}