/* ===== Variables ===== */
:root {
  --bg: #030308;
  --bg-elevated: #0a0a12;
  --surface: rgba(255, 255, 255, 0.03);
  --border: rgba(0, 212, 255, 0.15);
  --cyan: #00d4ff;
  --cyan-dim: #0099cc;
  --blue: #0066ff;
  --purple: #6600ff;
  --text: #f0f4f8;
  --text-muted: rgba(240, 244, 248, 0.55);
  --font: "Noto Sans JP", system-ui, sans-serif;
  --font-display: "Syne", "Noto Sans JP", sans-serif;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --header-h: 72px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--cyan-dim) var(--bg);
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  overflow-x: hidden;
  cursor: default;
}

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

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

/* ===== Background layers ===== */
#wave-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.cursor-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 2;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
  opacity: 0;
}

body:hover .cursor-glow { opacity: 1; }

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
  transition: background 0.4s var(--ease-out), backdrop-filter 0.4s;
}

.header.scrolled {
  background: rgba(3, 3, 8, 0.75);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 160;
}

.logo-ring {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top-color: var(--cyan);
  border-right-color: rgba(255, 255, 255, 0.4);
  animation: spin 8s linear infinite;
  flex-shrink: 0;
}

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

.logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
}

.logo-accent { color: var(--cyan); }

.nav {
  position: fixed;
  top: 0;
  right: clamp(1.25rem, 4vw, 3rem);
  z-index: 99;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2.5rem);
}

.nav-link {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  position: relative;
  padding: 0.35rem 0;
  color: rgba(240, 244, 248, 0.75);
  transition: color 0.25s ease, text-shadow 0.25s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--blue));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s var(--ease-out);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--text);
  text-shadow: 0 0 20px rgba(0, 212, 255, 0.35);
}

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link.is-active::after {
  transform: scaleX(1);
}

.nav-link.is-active {
  color: var(--text);
}

.nav-cta {
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: rgba(0, 212, 255, 0.05);
  color: var(--text);
  transition: background 0.3s, box-shadow 0.3s, border-color 0.3s, color 0.3s;
}

.nav-cta::after {
  display: none;
}

.nav-cta:hover,
.nav-cta:focus-visible {
  background: rgba(0, 212, 255, 0.12);
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.2);
  text-shadow: none;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 160;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: transform 0.3s, opacity 0.3s;
}

.menu-toggle.active span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.menu-toggle.active span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  z-index: 10;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-h) + 2rem) clamp(1.5rem, 5vw, 4rem) 4rem;
}

.hero-inner {
  max-width: 900px;
  text-align: center;
}

.hero-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  color: var(--cyan);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 2rem;
}

.hero-line {
  display: block;
  font-size: clamp(2.5rem, 8vw, 5.5rem);
  letter-spacing: -0.02em;
}

.hero-line .outline {
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.35);
  color: transparent;
}

.gradient-text {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--blue) 50%, var(--purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-vision {
  max-width: 560px;
  margin: 0 auto 2.5rem;
  color: var(--text-muted);
  font-size: clamp(0.9rem, 2vw, 1.05rem);
}

.vision-label {
  font-size: 0.65rem;
  letter-spacing: 0.4em;
  color: var(--cyan);
  margin-bottom: 0.75rem;
}

.counter {
  font-weight: 900;
  font-size: 1.2em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  border-radius: 100px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  font-weight: 500;
  font-size: 0.95rem;
  transition: background 0.3s, box-shadow 0.4s, transform 0.3s var(--ease-out);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(0, 102, 255, 0.1));
  opacity: 0;
  transition: opacity 0.3s;
}

.btn-primary:hover {
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.25), inset 0 0 20px rgba(0, 212, 255, 0.05);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.btn-primary:hover::before { opacity: 1; }

.btn-primary span,
.btn-primary svg { position: relative; z-index: 1; }

.btn-primary svg { transition: transform 0.3s var(--ease-out); }
.btn-primary:hover svg { transform: translateX(4px); }

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: var(--text-muted);
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--cyan), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { transform: scaleY(0.3); opacity: 0.3; }
  50% { transform: scaleY(1); opacity: 1; }
}

/* ===== Sections common ===== */
section {
  position: relative;
  z-index: 10;
  padding: clamp(5rem, 12vh, 8rem) clamp(1.5rem, 5vw, 4rem);
}

.section-label {
  font-size: 0.65rem;
  letter-spacing: 0.4em;
  color: var(--cyan);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 2rem;
}

/* ===== Reveal animations ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* ===== Founder profile (TOP) ===== */
.founder {
  max-width: 1100px;
  margin: 0 auto;
}

.founder-wrap {
  padding: 0 clamp(1.5rem, 5vw, 4rem);
}

.founder-panel {
  padding: clamp(1.5rem, 3vw, 2.5rem) clamp(2rem, 4vw, 3rem);
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.06) 0%, rgba(255, 255, 255, 0.02) 40%, rgba(102, 0, 255, 0.04) 100%);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  overflow: visible;
}

.founder-grid {
  display: grid;
  grid-template-columns: minmax(220px, 340px) 1fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: center;
}

.founder-visual {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(0, 212, 255, 0.08);
  aspect-ratio: 682 / 1024;
  max-height: clamp(360px, 52vh, 480px);
  background: #0a0a12;
}

.founder-photo-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
}

.founder-role {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.5rem;
}

.founder-content .section-title {
  margin-bottom: 0.75rem;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
}

.founder-name {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 800;
  letter-spacing: 0.12em;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.founder-name span {
  color: var(--cyan);
}

.founder-content p:not(.founder-role):not(.founder-name) {
  font-size: 0.92rem;
  line-height: 2;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.founder-content p:last-child {
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .founder-grid {
    grid-template-columns: 1fr;
  }

  .founder-visual {
    max-height: 400px;
    margin: 0 auto;
    max-width: 280px;
  }
}

/* ===== About ===== */
.about {
  max-width: 1200px;
  margin: 0 auto;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  grid-template-rows: auto auto;
  grid-template-areas:
    "visual head"
    "visual copy";
  gap: clamp(1.25rem, 3vw, 2rem) clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.about-head {
  grid-area: head;
}

.about-head .section-title {
  margin-bottom: 0;
}

.about-copy {
  grid-area: copy;
}

/* スマホ専用（装飾カードの代わり・重なり防止） */
.about-keywords {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
}

.about-keyword {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--cyan);
  padding: 1.1rem 1.25rem;
  border-radius: 14px;
  border: 1px solid var(--border);
}

.about-keyword--leverage {
  background: linear-gradient(160deg, rgba(0, 102, 255, 0.2), transparent 60%),
    linear-gradient(45deg, #0d1117, #1a1a2e);
}

.about-keyword--impact {
  background: linear-gradient(200deg, rgba(0, 212, 255, 0.15), transparent 50%),
    linear-gradient(225deg, #0a0a12, #12121f);
}

.about-visual {
  grid-area: visual;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  min-height: 320px;
}

.about-card {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
  transition: transform 0.5s var(--ease-out);
}

.about-card-1 {
  background: linear-gradient(160deg, rgba(0, 102, 255, 0.2), transparent 60%),
    linear-gradient(45deg, #0d1117, #1a1a2e);
  transform: translateY(20px);
}

.about-card-2 {
  background: linear-gradient(200deg, rgba(0, 212, 255, 0.15), transparent 50%),
    linear-gradient(225deg, #0a0a12, #12121f);
  align-self: end;
}

.card-shine {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255, 255, 255, 0.06) 50%, transparent 60%);
  transform: translateX(-100%);
  animation: shine 4s ease-in-out infinite;
}

@keyframes shine {
  0%, 100% { transform: translateX(-100%); }
  50% { transform: translateX(100%); }
}

.card-tag {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--cyan);
  position: relative;
  z-index: 1;
}

.about-lead {
  font-size: 1.15rem;
  margin-bottom: 1.5rem;
  line-height: 1.9;
}

.about-lead strong { color: var(--cyan); }

.about-body {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.about-body em {
  font-style: normal;
  color: var(--text);
  border-bottom: 1px solid var(--cyan);
}

.about-body strong {
  color: var(--text);
  font-weight: 700;
}

/* ===== Services ===== */
.services {
  padding-bottom: 0;
  overflow: hidden;
}

.services-header {
  max-width: 1200px;
  margin: 0 auto 3rem;
}

.service-track {
  display: grid;
  grid-template-columns: repeat(2, minmax(280px, 1fr));
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  padding-bottom: 4rem;
}

.service-card {
  position: relative;
  padding: 2.5rem 2rem 2.5rem 1.75rem;
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s, border-color 0.4s;
  transform-style: preserve-3d;
}

.service-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 21px;
  padding: 1px;
  background: linear-gradient(135deg, var(--cyan), transparent, var(--purple));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s;
}

.service-card:hover {
  border-color: rgba(0, 212, 255, 0.35);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 212, 255, 0.08);
}

.service-card:hover::before { opacity: 1; }

.service-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 1.75rem;
  bottom: 1.75rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent, var(--cyan)), transparent 85%);
  opacity: 0.85;
}

.service-card--a { --accent: var(--cyan); }
.service-card--b { --accent: var(--blue); }
.service-card--c { --accent: #7b5cff; }

.card-label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--accent, var(--cyan));
  opacity: 0.8;
  margin-bottom: 0.65rem;
}

.service-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.35;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.service-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.service-tags li {
  font-size: 0.7rem;
  padding: 0.35rem 0.75rem;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--cyan);
  letter-spacing: 0.05em;
}

.service-link {
  font-size: 0.85rem;
  color: var(--cyan);
  font-weight: 500;
  transition: letter-spacing 0.3s;
}

.service-link:hover { letter-spacing: 0.05em; }

.marquee {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 0;
  overflow: hidden;
  background: rgba(0, 212, 255, 0.02);
}

.marquee-inner {
  display: flex;
  width: max-content;
  animation: marquee 25s linear infinite;
}

.marquee-inner span {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: 0.05em;
  white-space: nowrap;
  padding-right: 2rem;
  color: rgba(255, 255, 255, 0.08);
  -webkit-text-stroke: 1px rgba(0, 212, 255, 0.25);
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* ===== Impact ===== */
.impact {
  text-align: center;
  padding: clamp(6rem, 15vh, 10rem) 1.5rem;
}

.impact-inner { max-width: 700px; margin: 0 auto; }

.impact-quote {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.impact-sub {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* ===== News ===== */
.news {
  max-width: 900px;
  margin: 0 auto;
}

.news-header { margin-bottom: 2.5rem; }

.news-list { list-style: none; }

.news-item {
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: 1rem 1.5rem;
  align-items: start;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border);
  transition: padding-left 0.3s var(--ease-out);
}

.news-item:hover { padding-left: 0.5rem; }

.news-item time {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.news-badge {
  font-size: 0.65rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--cyan);
  white-space: nowrap;
}

.news-item a {
  font-size: 0.95rem;
  line-height: 1.6;
  transition: color 0.3s;
  grid-column: 1 / -1;
}

@media (min-width: 640px) {
  .news-item {
    grid-template-columns: 100px auto 1fr;
    align-items: center;
  }
  .news-item a { grid-column: 3; }
}

.news-item a:hover { color: var(--cyan); }

/* ===== Company ===== */
.company {
  max-width: 700px;
  margin: 0 auto;
}

.company-table { margin-top: 2rem; }

.company-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
}

.company-row dt {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

.company-row dd {
  font-size: 0.95rem;
}

/* ===== Contact form ===== */
.contact {
  position: relative;
  overflow: hidden;
  padding: clamp(4rem, 10vh, 6rem) clamp(1.25rem, 4vw, 2rem);
}

.contact-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.12), transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: pulse-glow 4s ease-in-out infinite;
  pointer-events: none;
}

@keyframes pulse-glow {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.6; }
  50% { transform: translate(-50%, -50%) scale(1.15); opacity: 1; }
}

.contact-inner {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.contact-form-title {
  font-size: clamp(1.25rem, 3.5vw, 1.65rem);
  line-height: 1.55;
  margin-bottom: 1rem;
}

.contact-form-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.85;
  margin-bottom: 2.5rem;
}

.contact-form {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  text-align: left;
}

.form-row label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.req {
  color: var(--cyan);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: rgba(240, 244, 248, 0.3);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.12);
}

.contact-form select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2300d4ff' d='M6 8 0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.contact-form select option {
  background: #0a0a12;
  color: var(--text);
}

.form-row--half {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-honey {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.form-status {
  margin-bottom: 1.25rem;
  padding: 0.85rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  line-height: 1.6;
  text-align: left;
}

.form-status--success {
  color: #7dffb8;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.25);
}

.form-status--error {
  color: #ffb4b4;
  background: rgba(255, 80, 80, 0.08);
  border: 1px solid rgba(255, 80, 80, 0.25);
}

.form-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.form-submit {
  align-self: center;
  margin-top: 0.5rem;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  color: #030308;
  font-weight: 700;
  letter-spacing: 0.04em;
  background: linear-gradient(135deg, #00d4ff 0%, #00b8e6 45%, #0099cc 100%);
  border: 1px solid rgba(0, 212, 255, 0.9);
  box-shadow:
    0 4px 20px rgba(0, 212, 255, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.contact-form .form-submit::before {
  display: none;
}

.contact-form .form-submit:hover {
  color: #030308;
  background: linear-gradient(135deg, #33e0ff 0%, #00d4ff 50%, #00b8e6 100%);
  border-color: #66e5ff;
  box-shadow:
    0 8px 32px rgba(0, 212, 255, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.contact-form .form-submit .form-submit-label,
.contact-form .form-submit svg {
  color: #030308;
}

.contact-form .form-submit:disabled {
  color: rgba(3, 3, 8, 0.55);
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.45), rgba(0, 153, 204, 0.45));
  box-shadow: none;
}

@media (max-width: 600px) {
  .form-row--half {
    grid-template-columns: 1fr;
  }
}

/* ===== Footer ===== */
.footer {
  position: relative;
  z-index: 10;
  padding: 3rem clamp(1.5rem, 5vw, 4rem);
  border-top: 1px solid var(--border);
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-nav a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.3s;
}

.footer-nav a:hover { color: var(--cyan); }

.copyright {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ===== Responsive ===== */
@media screen and (max-width: 900px) {
  .about {
    overflow: visible;
  }

  .about-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    grid-template-areas:
      "head"
      "keywords"
      "copy";
    gap: 1.5rem;
  }

  .about-head {
    position: relative;
    z-index: 1;
  }

  .about-head .section-title {
    font-size: clamp(1.65rem, 7.5vw, 2.2rem);
    line-height: 1.3;
    margin-bottom: 0;
  }

  /* iPhone Safari：装飾カードは非表示（重なりの原因） */
  .about-visual {
    display: none !important;
  }

  .about-keywords {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    grid-area: keywords;
  }

  .about .reveal {
    transform: none;
  }

  .service-track { grid-template-columns: 1fr; }
}

html.menu-open,
body.menu-open {
  overflow: hidden;
  height: 100%;
}

body.menu-open {
  position: fixed;
  left: 0;
  right: 0;
  width: 100%;
}

@media (max-width: 768px) {
  body.menu-open .header {
    z-index: 200;
  }

  .nav {
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 100%;
    height: 100dvh;
    max-height: 100dvh;
    padding:
      calc(var(--header-h) + env(safe-area-inset-top, 0px))
      1.5rem
      calc(1.5rem + env(safe-area-inset-bottom, 0px));
    background: rgba(3, 3, 8, 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    z-index: 150;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s var(--ease-out), visibility 0.35s;
  }

  .nav.open {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link { font-size: 1rem; }

  .menu-toggle { display: flex; }

  .br-pc { display: none; }

  .company-row {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}