/* ============================================================
   Rev Innovation - style.css
   ============================================================ */
:root {
  --c-main: #0b1f3a;
  --c-accent: #1e6bff;
  --c-accent-2: #00c2b8;
  --c-text: #1f2733;
  --c-muted: #6b7686;
  --c-line: #e3e7ee;
  --c-bg-gray: #f4f6fa;
  --c-white: #fff;
  --c-error: #e5484d;
  --font-ja: "Noto Sans JP", sans-serif;
  --font-en: "Outfit", "Noto Sans JP", sans-serif;
  --header-h: 72px;
  --radius: 12px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

html { scroll-padding-top: var(--header-h); }

body {
  margin: 0;
  font-family: var(--font-ja);
  color: var(--c-text);
  background: var(--c-white);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p, dl, dd { margin: 0; }

.container { width: min(1120px, 100% - 40px); margin-inline: auto; }
.container--narrow { width: min(860px, 100% - 40px); }
.sp-only { display: none; }

/* ---------- Button ---------- */
.btn {
  display: inline-block;
  padding: 16px 44px;
  border: 0;
  border-radius: 999px;
  font: 700 15px/1 var(--font-ja);
  letter-spacing: .08em;
  cursor: pointer;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.btn--primary {
  color: var(--c-white);
  background: linear-gradient(120deg, var(--c-accent), var(--c-accent-2));
  box-shadow: 0 8px 24px rgba(30, 107, 255, .3);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(30, 107, 255, .4); }

/* ---------- Header ---------- */
.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
}
/* 背景・ぼかしは疑似要素に持たせる
   （header 自体に backdrop-filter を付けると、中の position:fixed な .nav の基準が header になり SP メニューが潰れるため） */
.header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0;
  background: rgba(255, 255, 255, .92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--c-line);
  transition: opacity .3s;
}
.header.is-scrolled::before { opacity: 1; }
.header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding-inline: 32px;
}
.logo {
  font: 700 22px/1 var(--font-en);
  letter-spacing: .02em;
  color: var(--c-white);
  transition: color .3s;
}
.header.is-scrolled .logo { color: var(--c-main); }
.logo--light { color: var(--c-white); }

.nav ul { display: flex; align-items: center; gap: 36px; }
.nav a {
  font: 500 15px/1 var(--font-en);
  letter-spacing: .06em;
  color: var(--c-white);
  transition: color .3s, opacity .3s;
}
.nav a:hover { opacity: .7; }
.header.is-scrolled .nav a { color: var(--c-main); }
.nav a.is-current { color: var(--c-accent-2); }
.header.is-scrolled .nav a.is-current { color: var(--c-accent); }
.nav .nav__cta,
.header.is-scrolled .nav .nav__cta {
  padding: 12px 26px;
  border-radius: 999px;
  color: var(--c-white);
  background: var(--c-accent);
}
.nav .nav__cta.is-current,
.header.is-scrolled .nav .nav__cta.is-current {
  color: var(--c-white);
  background: var(--c-main);
}

.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  border: 0;
  background: none;
  cursor: pointer;
}
.nav-toggle span {
  position: absolute;
  left: 10px;
  width: 24px;
  height: 2px;
  background: var(--c-white);
  transition: transform .3s, opacity .3s, background .3s;
}
.header.is-scrolled .nav-toggle span,
.nav-open .nav-toggle span { background: var(--c-main); }
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 28px; }
.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 100vh;
  min-height: 100svh;
  overflow: hidden;
  color: var(--c-white);
  background: var(--c-main);
  text-align: center;
}
.hero__bg {
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(circle at 20% 30%, rgba(30, 107, 255, .55), transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(0, 194, 184, .45), transparent 45%);
  filter: blur(40px);
  animation: heroMove 16s ease-in-out infinite alternate;
}
.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 60px 60px;
}
@keyframes heroMove {
  to { transform: translate(5%, -4%) rotate(8deg); }
}
.hero__inner { position: relative; }
.hero__en {
  font: 500 14px/1 var(--font-en);
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--c-accent-2);
  margin-bottom: 24px;
}
.hero__title {
  font-size: clamp(32px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .06em;
}
.hero__lead {
  margin: 24px 0 48px;
  font-size: clamp(15px, 1.6vw, 18px);
  color: rgba(255, 255, 255, .8);
}
.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 32px;
  translate: -50% 0;
  padding-bottom: 56px;
  font: 500 12px/1 var(--font-en);
  letter-spacing: .2em;
  color: rgba(255, 255, 255, .7);
}
.hero__scroll::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 1px;
  height: 44px;
  background: rgba(255, 255, 255, .6);
  transform-origin: top;
  animation: scrollLine 2s var(--ease) infinite;
}
@keyframes scrollLine {
  0% { transform: scaleY(0); }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- Section ---------- */
.section { padding: 120px 0; }
.section--gray { background: var(--c-bg-gray); }
.section--dark { background: var(--c-main); color: var(--c-white); }

.section-head { margin-bottom: 56px; text-align: center; }
.section-head__en {
  font: 700 clamp(40px, 6vw, 64px)/1 var(--font-en);
  letter-spacing: .02em;
  background: linear-gradient(120deg, var(--c-accent), var(--c-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section-head__ja {
  margin-top: 12px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--c-muted);
}
.section-head--light .section-head__ja { color: rgba(255, 255, 255, .7); }

/* ---------- About ---------- */
.about__intro {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  align-items: center;
  gap: 72px;
}
.about__catch {
  margin-bottom: 32px;
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: .04em;
  color: var(--c-main);
}
.about__text p + p { margin-top: 1.2em; }
.about__text p:not(.about__catch) { color: #4a5464; }

/* 社名の由来パネル */
.about__origin {
  position: relative;
  margin: 0;
  padding: 56px 40px;
  text-align: center;
  overflow: hidden;
  border-radius: calc(var(--radius) * 1.5);
  color: var(--c-white);
  background: var(--c-main);
}
.about__origin::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30, 107, 255, .55), transparent 70%);
}
.about__origin::after {
  content: "";
  position: absolute;
  bottom: -100px;
  left: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 194, 184, .35), transparent 70%);
}
.about__origin > * { position: relative; z-index: 1; }
.origin {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.origin__item { display: flex; flex-direction: column; align-items: center; gap: 10px; margin: 0; }
.origin__word {
  font: 500 clamp(34px, 4vw, 48px)/1 var(--font-en);
  letter-spacing: .01em;
  color: rgba(255, 255, 255, .35);
}
.origin__head {
  font-weight: 700;
  background: linear-gradient(120deg, #6fa3ff, var(--c-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.origin__ja { font-size: 13px; font-weight: 700; letter-spacing: .4em; text-indent: .4em; color: rgba(255, 255, 255, .7); }

/* 中央の「×」：円＋左右に伸びる線 */
.origin__cross {
  position: relative;
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  font: 500 26px/1 var(--font-en);
  color: var(--c-white);
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent-2));
  box-shadow: 0 0 0 8px rgba(255, 255, 255, .06), 0 8px 24px rgba(0, 194, 184, .35);
}
.origin__cross::before,
.origin__cross::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 72px;
  height: 1px;
}
.origin__cross::before { right: calc(100% + 16px); background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .4)); }
.origin__cross::after { left: calc(100% + 16px); background: linear-gradient(90deg, rgba(255, 255, 255, .4), transparent); }

.origin__result {
  margin-top: 36px;
  font: 500 14px/1 var(--font-en);
  letter-spacing: .2em;
  color: rgba(255, 255, 255, .55);
}

/* 価値観 */
.values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 96px;
}
.value {
  position: relative;
  padding: 40px 32px 36px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-white);
  transition: border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.value:hover { border-color: transparent; box-shadow: 0 16px 40px rgba(11, 31, 58, .1); }
.value__num {
  position: absolute;
  top: 28px;
  right: 28px;
  font: 700 44px/1 var(--font-en);
  color: transparent;
  -webkit-text-stroke: 1px var(--c-line);
}
.value__en {
  font: 500 13px/1 var(--font-en);
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--c-accent);
}
.value__title { margin: 14px 0 16px; font-size: 21px; color: var(--c-main); }
.value__text { font-size: 14px; color: var(--c-muted); }

/* ---------- Service ---------- */
.services { display: grid; gap: 32px; max-width: 980px; margin-inline: auto; }
.service {
  display: grid;
  grid-template-columns: minmax(240px, 2fr) 3fr;
  overflow: hidden;
  border-radius: calc(var(--radius) * 1.5);
  background: var(--c-white);
  box-shadow: 0 10px 40px rgba(11, 31, 58, .08);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
}
.service:hover { transform: translateY(-4px); box-shadow: 0 20px 50px rgba(11, 31, 58, .14); }

.service__visual {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 280px;
  padding: 36px;
  overflow: hidden;
  color: var(--c-white);
  background: linear-gradient(135deg, var(--c-main) 0%, #12407f 60%, var(--c-accent) 100%);
}
/* 背景の装飾（グリッド＋光） */
.service__visual::before,
.service__visual::after {
  content: "";
  position: absolute;
  pointer-events: none;
}
.service__visual::before {
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .07) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(135deg, transparent 20%, #000 100%);
}
.service__visual::after {
  right: -60px;
  bottom: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 194, 184, .6), transparent 70%);
  transition: transform .6s var(--ease);
}
.service:hover .service__visual::after { transform: scale(1.25); }
.service__num {
  position: relative;
  font: 700 88px/1 var(--font-en);
  letter-spacing: -.02em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, .6);
}
.service__en {
  position: relative;
  font: 500 14px/1 var(--font-en);
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--c-accent-2);
}

.service__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 48px 56px;
}
.service__title {
  position: relative;
  padding-bottom: 20px;
  margin-bottom: 20px;
  font-size: clamp(22px, 2.6vw, 28px);
  letter-spacing: .06em;
  color: var(--c-main);
}
.service__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-accent-2));
}
.service__text { font-size: 15px; color: var(--c-muted); }
.service__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.service__tags li {
  padding: 6px 14px;
  border: 1px solid rgba(30, 107, 255, .25);
  border-radius: 999px;
  font-size: 13px;
  color: var(--c-accent);
  background: rgba(30, 107, 255, .05);
}

/* ---------- News ---------- */
.news { border-top: 1px solid var(--c-line); }
.news__item {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 28px 8px;
  border-bottom: 1px solid var(--c-line);
}
.news__date { font: 500 15px/1 var(--font-en); color: var(--c-muted); }
.news__cat {
  min-width: 88px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  text-align: center;
  color: var(--c-accent);
  background: rgba(30, 107, 255, .08);
}

/* ---------- Company ---------- */
.company {
  border-radius: var(--radius);
  background: var(--c-white);
  overflow: hidden;
}
.company__row {
  display: grid;
  grid-template-columns: 200px 1fr;
  border-bottom: 1px solid var(--c-line);
}
.company__row:last-child { border-bottom: 0; }
.company dt,
.company dd { padding: 24px 32px; }
.company dt { font-weight: 700; color: var(--c-main); background: rgba(11, 31, 58, .03); }

/* ---------- Contact ---------- */
.alert {
  margin-bottom: 32px;
  padding: 18px 24px;
  border-radius: var(--radius);
  text-align: center;
}
.alert--success { background: rgba(0, 194, 184, .15); color: #7ff0e9; }
.alert--error { background: rgba(229, 72, 77, .15); color: #ffb3b5; }

.form__hp { position: absolute; left: -9999px; }
.form__row { margin-bottom: 28px; }
.form__row label { display: block; margin-bottom: 10px; font-size: 15px; font-weight: 500; }
.req {
  margin-left: 8px;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  background: var(--c-accent);
  vertical-align: 2px;
}
.form input[type="text"],
.form input[type="email"],
.form textarea {
  width: 100%;
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 8px;
  font: 16px/1.6 var(--font-ja);
  color: var(--c-white);
  background: rgba(255, 255, 255, .06);
  transition: border-color .3s, background .3s;
}
.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--c-accent-2);
  background: rgba(255, 255, 255, .1);
}
.form textarea { resize: vertical; }
.form__row.has-error input,
.form__row.has-error textarea { border-color: var(--c-error); }
.form__error { margin-top: 6px; font-size: 13px; color: #ff9a9d; }
.form__error:empty { display: none; }
.form__submit { margin-top: 48px; text-align: center; }
.form__submit .btn[disabled] { opacity: .6; cursor: wait; }

/* ---------- Footer ---------- */
.footer { padding: 40px 0; background: #071428; color: rgba(255, 255, 255, .6); }
.footer__inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.footer small { font: 13px/1 var(--font-en); }

/* ---------- 404 ---------- */
.error__code {
  font: 700 clamp(112px, 24vw, 200px)/1 var(--font-en);
  letter-spacing: .02em;
  background: linear-gradient(120deg, #6fa3ff, var(--c-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.error__title {
  margin-top: 24px;
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .06em;
}

/* ---------- Page top ---------- */
.pagetop {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  font-size: 20px;
  color: var(--c-white);
  background: var(--c-accent);
  box-shadow: 0 6px 20px rgba(30, 107, 255, .35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity .3s, visibility .3s, transform .3s;
}
.pagetop.is-show { opacity: 1; visibility: visible; transform: none; }

/* ---------- Fade in ---------- */
.js .js-fade {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
}
.js .js-fade.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .js-fade { opacity: 1; transform: none; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .about__intro { grid-template-columns: 1fr; gap: 48px; }
  .values { grid-template-columns: 1fr; gap: 16px; margin-top: 56px; }
  .service { grid-template-columns: 1fr; }
  .service__visual { flex-direction: row; align-items: flex-end; min-height: 0; }
  .service__num { font-size: 64px; }
}

@media (max-width: 768px) {
  :root { --header-h: 64px; }
  .sp-only { display: inline; }
  .header__inner { padding-inline: 16px; }
  .container,
  .container--narrow { width: calc(100% - 32px); }

  .nav-toggle { display: block; z-index: 2; }
  .nav {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, .97);
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s, visibility .3s;
  }
  .nav-open .nav { opacity: 1; visibility: visible; }
  .nav-open .logo { color: var(--c-main); position: relative; z-index: 2; }
  .nav ul { flex-direction: column; gap: 32px; }
  .nav a,
  .header.is-scrolled .nav a { font-size: 22px; color: var(--c-main); }

  .section { padding: 80px 0; }
  .section-head { margin-bottom: 40px; }
  .about__origin { padding: 36px 24px; }
  .value { padding: 32px 24px 28px; }
  .service__visual { padding: 28px 24px; }
  .service__num { font-size: 52px; }
  .service__body { padding: 32px 24px 36px; }

  .news__item { grid-template-columns: auto 1fr; gap: 10px 16px; padding: 20px 4px; }
  .news__cat { justify-self: start; }
  .news__title { grid-column: 1 / -1; }

  .company__row { grid-template-columns: 1fr; }
  .company dt { padding: 14px 20px; }
  .company dd { padding: 14px 20px 20px; }

  .footer__inner { flex-direction: column; }
  .pagetop { right: 16px; bottom: 16px; width: 44px; height: 44px; }
}