/* Design baseline: fv_references/FV_primary_reference.png (1672 × 941).
   Desktop values follow the reference proportions; photography remains a separate asset. */
:root {
  color-scheme: light;
  --ink: #070e36;
  --blue: #0647ff;
  --cyan: #00b7ed;
  --header-height: clamp(94px, 7.42vw, 142px);
  --page-gutter: 4.12%;
  font-family: "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  color: var(--ink);
  background: #fff;
  font-synthesis: none;
}
* { box-sizing: border-box; }
body { margin: 0; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
a { color: inherit; text-decoration: none; }
button { color: inherit; }
button, a { touch-action: manipulation; }
button:not(:disabled), a { cursor: pointer; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid #244be3; outline-offset: 6px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: fixed; z-index: 100; top: 10px; left: 10px; padding: 12px 20px; background: #fff; border: 2px solid var(--blue); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; top: 0; z-index: 50; background: #fff; box-shadow: 0 2px 12px #1538590c; display: flex; align-items: center; gap: 2vw; height: var(--header-height); max-width: 1920px; margin: auto; padding: 0 2.3% 0 var(--page-gutter); }
.brand { display: inline-flex; flex: 0 0 auto; width: clamp(160px, 12.5vw, 220px); line-height: 1; }
.brand img { display: block; width: 100%; height: auto; }
.desktop-nav { display: flex; align-items: center; gap: clamp(24px, 3.4vw, 65px); margin: 0 auto; }
.desktop-nav a { padding: 14px 0; font-size: clamp(13px, 1.08vw, 20px); font-weight: 700; white-space: nowrap; }
.desktop-nav a:hover { color: var(--blue); }
.site-header__actions { display: flex; align-items: center; gap: 1.3vw; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 1em; border: 0; border-radius: 100px; color: #fff; font-weight: 600; letter-spacing: .025em; background: linear-gradient(105deg, #063cff 8%, #006dff 53%, #00b8ed 100%); box-shadow: 0 7px 20px #0751df35; transition: box-shadow .18s, filter .18s; }
.button:hover { filter: brightness(1.06); box-shadow: 0 9px 26px #0751df50; }
.button:focus-visible { outline-color: #102578; }
.button--header { min-height: 52px; height: 3.6vw; max-height: 69px; padding: 0 2vw; font-size: clamp(13px, 1.04vw, 20px); white-space: nowrap; }
.arrow { position: relative; display: inline-block; flex: 0 0 auto; width: .9em; height: .7em; }
.arrow::before { content: ""; position: absolute; top: 50%; left: 0; width: 100%; border-top: 1.5px solid currentColor; }
.arrow::after { content: ""; position: absolute; right: 0; top: 50%; width: .43em; height: .43em; border-top: 1.5px solid currentColor; border-right: 1.5px solid currentColor; transform: translateY(-50%) rotate(45deg); }
.menu-toggle { display: flex; flex-direction: column; justify-content: center; gap: 10px; width: 48px; height: 48px; padding: 6px; border: 0; background: transparent; }
.menu-toggle span { display: block; height: 1.5px; width: 100%; background: var(--ink); transition: transform .18s, opacity .18s; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(11.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-11.5px) rotate(-45deg); }
.mobile-nav { position: absolute; right: 2.3%; top: calc(100% - 8px); width: min(380px, 92vw); padding: 18px 24px; background: #fff; border: 1px solid #e1eafa; border-radius: 8px; box-shadow: 0 18px 50px #163b7126; }
.mobile-nav a { display: flex; align-items: center; justify-content: space-between; min-height: 56px; padding: 12px 0; border-bottom: 1px solid #e8eef5; font-size: 15px; font-weight: 600; }
.mobile-nav a:last-child { border: 0; }
.mobile-nav a:hover, .mobile-nav__contact { color: var(--blue); }

.hero { position: relative; isolation: isolate; max-width: 1920px; min-height: max(48.86vw, calc(100svh - var(--header-height))); margin: auto; overflow: clip; }
.hero__background { position: absolute; z-index: -1; inset: 0; overflow: hidden; pointer-events: none; background: radial-gradient(ellipse at 77% 19%, #9df2fa70, transparent 24%), radial-gradient(ellipse at 66% 68%, #cce4ff70, transparent 31%); mask-image: linear-gradient(transparent, #000 5%, #000 90%, transparent); }
.hero__background::before { content: ""; position: absolute; width: 61%; height: 94%; left: 28%; top: 0; border-radius: 47% 53% 57% 43% / 44% 55% 45% 56%; transform: rotate(28deg); background: linear-gradient(145deg, #c5e5fc88, #eff9ff33 44%, #c7e5ff77 75%, #fff0); filter: blur(3px); }
.hero__background::after { content: ""; position: absolute; width: 67%; height: 61%; left: 40%; top: 29%; border-radius: 50%; transform: rotate(-26deg); border: clamp(34px, 5.2vw, 100px) solid #e1f1fe66; filter: blur(9px); }
.hero__copy { position: relative; z-index: 3; padding-top: 5.2vw; margin-left: var(--page-gutter); width: 44%; padding-bottom: 70px; }
.hero__eyebrow { margin: 0 0 1.25vw; color: var(--blue); font-size: clamp(20px, 1.64vw, 31px); font-weight: 700; letter-spacing: .02em; }
h1 { margin: 0; font-size: clamp(52px, 5.22vw, 100px); font-weight: 800; line-height: 1.2; letter-spacing: -.045em; }
h1 span { display: block; white-space: nowrap; }
.hero__lead { margin: 1.85vw 0 0; font-size: clamp(18px, 1.47vw, 28px); line-height: 1.7; font-weight: 500; letter-spacing: .005em; }
.hero__actions { display: flex; align-items: flex-start; flex-direction: column; gap: 1.95vw; margin-top: 2.9vw; }
.button--hero { min-height: 64px; height: 4.85vw; max-height: 93px; padding: 0 3.5vw; font-size: clamp(19px, 1.43vw, 27px); }
.text-link { display: inline-flex; align-items: center; gap: 1em; padding: 6px 0 8px; border-bottom: 2px solid currentColor; font-size: clamp(18px, 1.38vw, 26px); font-weight: 700; letter-spacing: .015em; }
.text-link:hover { color: var(--blue); }
.hero__visual { position: absolute; z-index: 1; inset: 0; pointer-events: none; }
.portrait-slot { position: absolute; left: calc(27.8% + 18px); top: 5%; width: 40%; height: 105%; }
/* Keep the supplied image intact. Only the lower edge fades into the CSS background. */
.portrait-slot > img { display: block; width: 100%; height: 100%; object-fit: contain; object-position: center bottom; mask-image: linear-gradient(#000 80%, transparent 91%); }
.cycle { position: absolute; top: 5%; left: 59%; width: 39%; aspect-ratio: 660 / 620; margin: 0; container-type: inline-size; }
.cycle__arrows { position: absolute; inset: 0; width: 100%; height: 100%; }
.cycle__node { position: absolute; display: flex; flex-direction: column; align-items: center; justify-content: center; width: 40.3%; aspect-ratio: 1; border-radius: 50%; transform: translate(-50%, -50%); background: radial-gradient(circle at 35% 28%, #fff, #fcfeff 65%, #eff7ff); box-shadow: 0 0 0 1.05cqw #ffffff45, 0 0 0 2.65cqw #ffffff40, 0 2.3cqw 6.5cqw #477bb12b; }
.cycle__node--ai { top: 25.5%; left: 49%; width: 42.3%; box-shadow: 0 0 0 1.15cqw #efffff55, 0 0 0 2.8cqw #ffffff40, 0 0 9cqw 2cqw #6ae9f957; }
.cycle__node--dx { top: 72%; left: 23%; box-shadow: 0 0 0 1.1cqw #ffffff45, 0 0 0 2.7cqw #ffffff40, 0 2.5cqw 7cqw 1cqw #65aaff66; }
.cycle__node--human { top: 72%; left: 76.5%; }
.cycle__icon { display: block; width: 10cqw; height: 10.6cqw; margin-bottom: .7cqw; }
.cycle__node h2 { margin: 0 0 .8cqw; font-family: Arial, "Noto Sans JP", sans-serif; font-size: 8.9cqw; line-height: 1.05; font-weight: 750; letter-spacing: -.025em; }
.cycle__node--human h2 { font-size: 8cqw; line-height: 1.15; }
.cycle__node p { margin: 0; font-size: 3.2cqw; font-weight: 600; text-align: center; line-height: 1.45; letter-spacing: .015em; }
.cycle__mobile-break, .cycle__narrow-break { display: none; }

.preview-fallback { display: none; max-width: 640px; margin: 30px auto; padding: 24px; background: #f1f7ff; line-height: 1.8; }
.preview-fallback:target { display: block; }
.preview-fallback a { text-decoration: underline; }
.preview-dialog { width: min(480px, calc(100% - 40px)); padding: 32px; border: 1px solid #dfe8f6; border-radius: 16px; color: var(--ink); box-shadow: 0 20px 80px #18336130; }
.preview-dialog::backdrop { background: #0b20365c; }
.preview-dialog__label { margin: 0 0 14px; font: 600 12px Arial, sans-serif; letter-spacing: .12em; color: #205bcc; }
.preview-dialog h2 { margin: 0 0 16px; font-size: 21px; }
.preview-dialog #preview-description { margin: 0; font-size: 15px; line-height: 1.85; }
.preview-dialog__close { min-height: 46px; min-width: 110px; margin-top: 24px; font-size: 15px; }

@media (min-width: 1920px) {
  .hero { min-height: max(938px, calc(100svh - var(--header-height))); }
  .hero__copy { padding-top: 100px; }
  .hero__eyebrow { margin-bottom: 24px; }
  .hero__lead { margin-top: 36px; }
  .hero__actions { gap: 37px; margin-top: 56px; }
}
@media (max-width: 1199px) {
  .desktop-nav { display: none; }
  .site-header { justify-content: space-between; }
  .site-header__actions { gap: 22px; }
  .hero__lead { font-size: 17px; }
  h1 { font-size: 5.2vw; }
  .hero__eyebrow { font-size: 1.9vw; }
  .hero__actions { margin-top: 28px; }
  .button--hero { min-height: 58px; font-size: 17px; }
  .text-link { font-size: 17px; }
}
@media (max-width: 899px) {
  :root { --header-height: 88px; --page-gutter: 6.15%; }
  .site-header { padding: 0 var(--page-gutter); }
  .brand { width: 180px; }
  .hero { min-height: calc(100svh - var(--header-height)); }
  .hero__copy { padding-top: 33px; padding-bottom: 0; margin-right: var(--page-gutter); width: auto; }
  .hero__eyebrow { margin-bottom: 20px; font-size: clamp(16px, 2.5vw, 20px); }
  h1 { font-size: clamp(38px, 7.7vw, 62px); line-height: 1.23; letter-spacing: -.055em; }
  .hero__lead { margin-top: 24px; max-width: 570px; font-size: 17px; line-height: 1.9; }
  .desktop-break { display: none; }
  .hero__actions { margin-top: 27px; gap: 17px; }
  .button--hero { min-height: 59px; padding: 0 30px; font-size: 17px; }
  .text-link { padding: 6px 0 7px; font-size: 16px; }
  .hero__visual { position: relative; height: clamp(330px, 64vw, 530px); margin-top: 34px; }
  .portrait-slot { left: 0; top: 0; width: 43%; height: 100%; }
  .portrait-slot > img { mask-image: linear-gradient(to bottom, #000 74%, rgb(0 0 0 / .92) 80%, rgb(0 0 0 / .56) 88%, rgb(0 0 0 / .16) 96%, transparent 100%); }
  .cycle { top: 3%; left: 35%; width: 63%; }
  .hero__background { background: radial-gradient(ellipse at 78% 70%, #b6f7fc66, transparent 34%), radial-gradient(ellipse at 20% 85%, #cce4ff70, transparent 35%); }
  .hero__background::before { top: 50%; left: -20%; width: 115%; height: 55%; }
  .hero__background::after { top: 62%; left: 13%; width: 100%; height: 32%; border-width: 30px; }
  .mobile-nav { right: var(--page-gutter); }
}
@media (max-width: 600px) {
  :root { --header-height: 78px; }
  .brand { width: 158px; }
  .button--header { display: none; }
  .menu-toggle { width: 44px; height: 44px; gap: 8px; padding: 7px; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(9.5px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-9.5px) rotate(-45deg); }
  .hero__copy { padding-top: 27px; }
  .hero__eyebrow { font-size: 16px; margin-bottom: 18px; }
  h1 { font-size: clamp(30px, 9.75vw, 55px); }
  .hero__lead { margin-top: 21px; font-size: 15px; line-height: 1.95; letter-spacing: .01em; }
  .desktop-break { display: initial; }
  .hero__actions { margin-top: 25px; gap: 15px; }
  .button--hero { min-height: 58px; padding: 0 28px; font-size: 16px; }
  .text-link { font-size: 15px; }
  .hero__visual { height: clamp(300px, calc(100svh - 514px), 330px); margin-top: 28px; }
  .portrait-slot { top: 0; left: -3%; width: 57%; height: 100%; }
  .cycle { left: 31%; top: 1%; width: 67%; }
  /* Keep caption glyphs clear of the curved edge, including at 320px. */
  .cycle__node { width: clamp(126px, 32.82vw, 132px); }
  .cycle__node > svg, .cycle__node > h2, .cycle__node > p { transform: translateY(-5px); flex-shrink: 0; }
  .cycle__node p { font-size: 12px; line-height: 1.3; letter-spacing: -.025em; white-space: nowrap; }
  .cycle__node h2 { margin-bottom: 2px; font-size: clamp(22px, 6.15vw, 24px); line-height: 1.05; }
  .cycle__node--human h2 { font-size: clamp(21px, 5.9vw, 23px); }
  .cycle__icon { width: clamp(20px, 6.15vw, 24px); height: clamp(20px, 6.15vw, 24px); margin-bottom: 1px; }
  .cycle__mobile-break { display: initial; }
  .cycle__node--dx { left: min(23%, calc(100% - 194px)); }
  .cycle__node--human { left: min(76.5%, calc(100% - 62px)); }
  .hero__background::before { top: 52%; height: 51%; }
}
@media (max-width: 374px) {
  .cycle__node { width: 112px; }
  .cycle__node--ai { top: 20%; width: 116px; }
  .cycle__node--dx, .cycle__node--human { top: 83%; }
  .cycle__node--dx { left: min(23%, calc(100% - 176px)); }
  .cycle__node--human { left: min(76.5%, calc(100% - 56px)); }
  .cycle__node h2, .cycle__node--human h2 { font-size: 20px; }
  .cycle__node p { line-height: 1.2; }
  .cycle__icon { width: 18px; height: 18px; }
  .cycle__narrow-break { display: initial; }
  .cycle__regular-break { display: none; }
  .cycle__arrows { transform: scaleY(1.3); transform-origin: center top; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}

/* The sticky header stays in document flow; existing anchor margins remain additive. */
html { scroll-padding-top: calc(var(--header-height) + 12px); }