:root {
  --bg: #17120b;
  --bg-alt: #21170b;
  --accent: #d9a441;
  --accent-soft: rgba(217, 164, 65, 0.32);
  --accent2: #c0763b;
  --text-main: #fdf7ea;
  --text-muted: #b29b7b;
  --border-subtle: rgba(188, 150, 92, 0.45);
  --card-bg: rgba(39, 27, 16, 0.96);
  --radius-lg: 18px;
  --radius-xl: 26px;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.85);
  --shadow-glow: 0 0 40px rgba(48, 232, 255, 0.4);
  --spacing-md: 18px;
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 15px;
  background: radial-gradient(circle at top, #322416 0%, #17120b 45%, #120c07 100%);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

.bg-grid {
  pointer-events: none;
  position: fixed;
  inset: 0;
  background-image: linear-gradient(
      rgba(188, 150, 92, 0.16) 1px,
      transparent 1px
    ),
    linear-gradient(
      90deg,
      rgba(188, 150, 92, 0.16) 1px,
      transparent 1px
    );
  background-size: 26px 26px;
  opacity: 0.3;
  mask-image: radial-gradient(circle at top, black 0%, transparent 60%);
  z-index: -1;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(20px);
  background: linear-gradient(
      to bottom,
      rgba(23, 18, 10, 0.96),
      rgba(23, 18, 10, 0.78),
      transparent
    );
  border-bottom: 1px solid rgba(188, 150, 92, 0.6);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 18px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.logo-image {
  height: 34px;
  width: auto;
  display: block;
  filter: drop-shadow(0 8px 18px rgba(0, 0, 0, 0.4));
}

.logo-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo-title {
  font-size: 17px;
  font-weight: 600;
}

.logo-sub {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
}

.main-nav a {
  color: var(--text-muted);
  text-decoration: none;
  position: relative;
  padding-bottom: 3px;
  transition: color 0.2s ease;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: linear-gradient(to right, var(--accent), var(--accent2));
  transition: width 0.25s ease;
}

.main-nav a:hover {
  color: var(--text-main);
}

.main-nav a:hover::after {
  width: 100%;
}

.hero {
  padding: 40px 0 40px;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 42px;
  align-items: center;
  transform-style: preserve-3d;
}

.hero-text {
  position: relative;
  animation: heroFadeUp 0.9s ease-out both;
}

.hero-tagline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.hero-tagline::before {
  content: '';
  width: 26px;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--accent));
}

.hero h1 {
  font-size: clamp(30px, 3.8vw, 40px);
  line-height: 1.35;
  margin: 0 0 16px;
}

.hero-lead {
  margin: 0 0 22px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
}

.hero-lead strong {
  color: var(--text-main);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease,
    transform 0.15s ease, box-shadow 0.15s ease;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #020617;
  box-shadow: var(--shadow-glow);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 24px 55px rgba(15, 23, 42, 0.9), var(--shadow-glow);
}

.btn.ghost {
  background: rgba(15, 23, 42, 0.7);
  border-color: rgba(148, 163, 184, 0.5);
  color: var(--text-main);
}

.btn.ghost:hover {
  border-color: var(--accent-soft);
  background: rgba(15, 23, 42, 0.85);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  font-size: 12px;
  color: var(--text-muted);
}

.hero-meta span {
  position: relative;
  padding-left: 10px;
}

.hero-meta span::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  border-radius: 999px;
  background: var(--accent);
  transform: translateY(-50%);
}

.hero-visual {
  position: relative;
  min-height: 260px;
  perspective: 1200px;
  animation: heroFloat 12s ease-in-out infinite;
}

.orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(1px);
  opacity: 0.9;
  will-change: transform;
}

.orb-main {
  width: 220px;
  height: 220px;
  right: -10px;
  top: -20px;
  background: radial-gradient(circle at 30% 20%, #ffffff, #f1cc85 30%, #c0763b 60%, #120c07 92%);
  box-shadow: 0 0 80px rgba(241, 204, 133, 0.5);
  animation: float 8s ease-in-out infinite;
}

.orb-sub {
  width: 120px;
  height: 120px;
  left: -10px;
  bottom: -10px;
  background: radial-gradient(circle at 30% 20%, #ffffff, #c0763b 30%, #d9a441 60%, #120c07 92%);
  box-shadow: 0 0 60px rgba(192, 118, 59, 0.7);
  opacity: 0.7;
  animation: float 9s ease-in-out infinite reverse;
}

/* ネオサイバー3Dビジュアル要素 */
.cyber-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(241, 204, 133, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(241, 204, 133, 0.1) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.4;
  animation: gridPulse 4s ease-in-out infinite;
  transform: perspective(1000px) rotateX(60deg);
  transform-origin: center center;
}

.cyber-cube {
  position: absolute;
  width: 80px;
  height: 80px;
  transform-style: preserve-3d;
  will-change: transform;
}

.cyber-cube::before,
.cyber-cube::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  border: 2px solid rgba(241, 204, 133, 0.6);
  background: linear-gradient(
    135deg,
    rgba(241, 204, 133, 0.15),
    rgba(192, 118, 59, 0.1)
  );
  box-shadow: 
    0 0 20px rgba(241, 204, 133, 0.4),
    inset 0 0 20px rgba(241, 204, 133, 0.1);
}

.cyber-cube::before {
  transform: rotateY(0deg) translateZ(40px);
}

.cyber-cube::after {
  transform: rotateY(90deg) translateZ(40px);
}

.cyber-cube-1 {
  right: 20%;
  top: 20%;
  animation: cubeRotate1 8s linear infinite;
}

.cyber-cube-2 {
  right: 10%;
  bottom: 30%;
  animation: cubeRotate2 10s linear infinite reverse;
}

.cyber-cube-3 {
  left: 15%;
  top: 50%;
  width: 60px;
  height: 60px;
  animation: cubeRotate3 12s linear infinite;
}

.cyber-ring {
  position: absolute;
  border: 2px solid rgba(241, 204, 133, 0.5);
  border-radius: 50%;
  box-shadow: 
    0 0 30px rgba(241, 204, 133, 0.3),
    inset 0 0 30px rgba(241, 204, 133, 0.1);
}

.cyber-ring::before {
  content: '';
  position: absolute;
  inset: -4px;
  border: 1px solid rgba(241, 204, 133, 0.3);
  border-radius: 50%;
  animation: ringPulse 3s ease-in-out infinite;
}

.cyber-ring-1 {
  width: 120px;
  height: 120px;
  right: 15%;
  top: 30%;
  transform: rotateX(70deg) rotateZ(45deg);
  animation: ringRotate1 15s linear infinite;
}

.cyber-ring-2 {
  width: 90px;
  height: 90px;
  left: 20%;
  bottom: 25%;
  transform: rotateX(60deg) rotateZ(-30deg);
  animation: ringRotate2 12s linear infinite reverse;
}

.cyber-lines {
  position: absolute;
  inset: 0;
  background: 
    linear-gradient(90deg, transparent 0%, rgba(241, 204, 133, 0.3) 50%, transparent 100%),
    linear-gradient(0deg, transparent 0%, rgba(241, 204, 133, 0.2) 50%, transparent 100%);
  background-size: 200% 200%;
  opacity: 0.5;
  animation: linesMove 6s linear infinite;
  mix-blend-mode: screen;
}

@keyframes gridPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.6; }
}

@keyframes cubeRotate1 {
  0% { transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg) translateZ(0); }
  100% { transform: rotateX(360deg) rotateY(360deg) rotateZ(0deg) translateZ(20px); }
}

@keyframes cubeRotate2 {
  0% { transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg) translateZ(0); }
  100% { transform: rotateX(0deg) rotateY(360deg) rotateZ(360deg) translateZ(-15px); }
}

@keyframes cubeRotate3 {
  0% { transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg) translateZ(0); }
  100% { transform: rotateX(360deg) rotateY(0deg) rotateZ(360deg) translateZ(10px); }
}

@keyframes ringRotate1 {
  0% { transform: rotateX(70deg) rotateZ(45deg) rotateY(0deg); }
  100% { transform: rotateX(70deg) rotateZ(45deg) rotateY(360deg); }
}

@keyframes ringRotate2 {
  0% { transform: rotateX(60deg) rotateZ(-30deg) rotateY(0deg); }
  100% { transform: rotateX(60deg) rotateZ(-30deg) rotateY(-360deg); }
}

@keyframes ringPulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

@keyframes linesMove {
  0% { background-position: 0% 0%, 0% 0%; }
  100% { background-position: 200% 200%, 200% 200%; }
}

.section {
  padding: 46px 0;
  position: relative;
}

.scroll-indicator {
  position: absolute;
  left: 50%;
  bottom: 10px;
  transform: translateX(-50%);
  pointer-events: none;
}

.scroll-indicator-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  opacity: 0.85;
  animation: fadeIn 1.6s ease-out 0.6s both;
}

.scroll-label {
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.scroll-shell {
  width: 20px;
  height: 32px;
  border-radius: 999px;
  border: 1px solid rgba(188, 150, 92, 0.8);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 4px;
}

.scroll-dot {
  width: 4px;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent), var(--accent2));
  animation: scrollDot 1.3s ease-in-out infinite;
}

.section-alt {
  background: radial-gradient(circle at top, rgba(15, 23, 42, 0.9), rgba(2, 6, 23, 0.96));
}

.section-inner {
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  margin-bottom: 26px;
}

.section-kicker {
  font-size: 12px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.section h2 {
  font-size: 26px;
  margin: 0 0 8px;
}

/* 「主なサービス」セクションのタイトルを強調（約2倍） */
#services .section-header h2 {
  font-size: 52px;
}

.section-lead {
  margin: 0;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.9;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 22px;
}

.card {
  border-radius: var(--radius-lg);
  background: linear-gradient(
      135deg,
      rgba(15, 23, 42, 0.96),
      rgba(15, 23, 42, 0.9)
    );
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
  padding: 18px 18px 16px;
}

.about-card h3 {
  margin: 0 0 12px;
  font-size: 17px;
}

.about-card dl {
  margin: 0;
  display: grid;
  gap: 8px;
  font-size: 14px;
}

.about-card dl div {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  column-gap: 8px;
}

dt {
  color: var(--text-muted);
}

dd {
  margin: 0;
}

.about-list {
  margin: 0;
  padding-left: 16px;
  font-size: 14px;
  color: var(--text-muted);
  display: grid;
  gap: 5px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  position: relative;
  overflow: hidden;
}

/* 最初の4つのサービスカードを3倍のサイズに */
.service-card:nth-child(1),
.service-card:nth-child(2),
.service-card:nth-child(3),
.service-card:nth-child(4) {
  grid-column: span 3;
  grid-row: span 1;
  transform: scale(1);
  padding: calc(var(--spacing-md) * 3);
  min-height: auto;
}

.service-card:nth-child(1) .service-tag,
.service-card:nth-child(2) .service-tag,
.service-card:nth-child(3) .service-tag,
.service-card:nth-child(4) .service-tag {
  font-size: calc(12px * 3);
  padding: calc(3px * 3) calc(10px * 3);
  margin-bottom: calc(8px * 3);
}

.service-card:nth-child(1) h3,
.service-card:nth-child(2) h3,
.service-card:nth-child(3) h3,
.service-card:nth-child(4) h3 {
  font-size: 26px;
  margin: 0 0 calc(8px * 3);
}

.service-card:nth-child(1) .service-lead,
.service-card:nth-child(2) .service-lead,
.service-card:nth-child(3) .service-lead,
.service-card:nth-child(4) .service-lead {
  font-size: 14px;
  margin: 0 0 calc(10px * 3);
  line-height: 1.6;
}

.service-card:nth-child(1) .service-points,
.service-card:nth-child(2) .service-points,
.service-card:nth-child(3) .service-points,
.service-card:nth-child(4) .service-points {
  font-size: 14px;
  margin: 0 0 calc(8px * 3);
  padding-left: calc(16px * 3);
  gap: calc(4px * 3);
  line-height: 1.6;
}

.service-card:nth-child(1) .service-note,
.service-card:nth-child(2) .service-note,
.service-card:nth-child(3) .service-note,
.service-card:nth-child(4) .service-note {
  font-size: 12px;
}

.service-card::before {
  content: '';
  position: absolute;
  inset: -40%;
  opacity: 0;
  background: radial-gradient(
    circle at 0 0,
    rgba(56, 189, 248, 0.4),
    transparent 60%
  );
  transition: opacity 0.4s ease, transform 0.4s ease;
  transform: translate3d(-40px, -30px, 0);
}

.service-card:hover::before {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

.service-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(56, 189, 248, 0.7);
  background: rgba(15, 23, 42, 0.8);
  font-size: 12px;
  color: var(--accent);
  margin-bottom: 8px;
}

.service-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.service-lead {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--text-muted);
}

.service-points {
  margin: 0 0 8px;
  padding-left: 16px;
  font-size: 13px;
  color: var(--text-muted);
  display: grid;
  gap: 4px;
}

.service-note {
  margin: 0;
  font-size: 12px;
  color: rgba(148, 163, 184, 0.9);
}

.service-card-wide {
  grid-column: 1 / -1;
}

/* 最初の4つのカードのフォントサイズを3倍に */
.service-card:nth-child(1) .service-tag,
.service-card:nth-child(2) .service-tag,
.service-card:nth-child(3) .service-tag,
.service-card:nth-child(4) .service-tag {
  font-size: calc(12px * 3);
  padding: calc(3px * 3) calc(10px * 3);
  margin-bottom: calc(8px * 3);
}

.works-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.work-card h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.work-type {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--accent);
}

.work-desc {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--text-muted);
}

.work-points {
  margin: 0;
  padding-left: 16px;
  font-size: 13px;
  color: var(--text-muted);
  display: grid;
  gap: 4px;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 22px;
}

.contact-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
}

.contact-card p {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0 0 10px;
  line-height: 1.8;
}

.contact-email {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono',
    'Courier New', monospace;
  font-size: 15px;
  color: var(--text-main);
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px dashed rgba(148, 163, 184, 0.8);
  background: rgba(15, 23, 42, 0.9);
  display: inline-block;
}

.contact-note {
  font-size: 12px;
}

.contact-card-outline {
  background: transparent;
  border-style: dashed;
}

.contact-list {
  margin: 0;
  padding-left: 16px;
  font-size: 14px;
  color: var(--text-muted);
  display: grid;
  gap: 4px;
}

.site-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.4);
  padding: 14px 0 18px;
  background: radial-gradient(circle at bottom, rgba(15, 23, 42, 0.9), rgba(2, 6, 23, 0.98));
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 12px;
  color: var(--text-muted);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-title {
  font-size: 13px;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

@keyframes float {
  0% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(0, -14px, 0);
  }
  100% {
    transform: translate3d(0, 0, 0);
  }
}

@keyframes heroFloat {
  0% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(0, -10px, 0);
  }
  100% {
    transform: translate3d(0, 0, 0);
  }
}

@keyframes heroFadeUp {
  0% {
    opacity: 0;
    transform: translate3d(0, 12px, 0);
  }
  100% {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes fadeIn {
  0% {
    opacity: 0;
    transform: translate3d(0, 6px, 0);
  }
  100% {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes scrollDot {
  0% {
    transform: translateY(0);
    opacity: 0.6;
  }
  60% {
    transform: translateY(10px);
    opacity: 1;
  }
  100% {
    transform: translateY(14px);
    opacity: 0;
  }
}

@media (max-width: 880px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1.1fr);
  }

  .hero-visual {
    order: -1;
    min-height: 240px;
    margin-bottom: 6px;
  }
}

@media (max-width: 720px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .main-nav {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 10px 18px;
  }

  .section {
    padding: 32px 0;
  }

  .section-header {
    margin-bottom: 20px;
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .services-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  /* モバイルでは最初の4つのカードも通常サイズに */
  .service-card:nth-child(1),
  .service-card:nth-child(2),
  .service-card:nth-child(3),
  .service-card:nth-child(4) {
    grid-column: span 1;
    padding: var(--spacing-md);
  }

  .service-card:nth-child(1) .service-tag,
  .service-card:nth-child(2) .service-tag,
  .service-card:nth-child(3) .service-tag,
  .service-card:nth-child(4) .service-tag {
    font-size: 12px;
    padding: 3px 10px;
    margin-bottom: 8px;
  }

  .service-card:nth-child(1) h3,
  .service-card:nth-child(2) h3,
  .service-card:nth-child(3) h3,
  .service-card:nth-child(4) h3 {
    font-size: 17px;
    margin: 0 0 8px;
  }

  .service-card:nth-child(1) .service-lead,
  .service-card:nth-child(2) .service-lead,
  .service-card:nth-child(3) .service-lead,
  .service-card:nth-child(4) .service-lead {
    font-size: 14px;
    margin: 0 0 10px;
    line-height: 1.6;
  }

  .service-card:nth-child(1) .service-points,
  .service-card:nth-child(2) .service-points,
  .service-card:nth-child(3) .service-points,
  .service-card:nth-child(4) .service-points {
    font-size: 13px;
    margin: 0 0 8px;
    padding-left: 16px;
    gap: 4px;
    line-height: 1.5;
  }

  .service-card:nth-child(1) .service-note,
  .service-card:nth-child(2) .service-note,
  .service-card:nth-child(3) .service-note,
  .service-card:nth-child(4) .service-note {
    font-size: 12px;
  }
}

@media (max-width: 520px) {
  .hero {
    padding-top: 30px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .cyber-cube {
    width: 50px;
    height: 50px;
  }

  .cyber-cube-3 {
    width: 35px;
    height: 35px;
  }

  .cyber-ring-1 {
    width: 80px;
    height: 80px;
  }

  .cyber-ring-2 {
    width: 60px;
    height: 60px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}