/* ==========================================================================
   PROMETHEUS MONITOR 2026 LP - DESIGN SYSTEM & STYLES
   Tone & Manner: Dark Navy Black (#0B0E14), Cyan Blue (#00D2FF), Glassmorphism
   ========================================================================== */

:root {
  --bg-dark: #0B0E14;
  --bg-card: rgba(18, 24, 36, 0.75);
  --bg-card-hover: rgba(24, 32, 48, 0.85);
  --primary-cyan: #00D2FF;
  --primary-cyan-glow: rgba(0, 210, 255, 0.35);
  --border-cyan: rgba(0, 210, 255, 0.22);
  --text-main: #E2E8F0;
  --text-muted: #94A3B8;
  --text-white: #FFFFFF;
  --navy-black: #06080D;
  --navy-surface: #101622;
  --font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html, body {
  overflow-x: hidden;
  max-width: 100%;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  background: radial-gradient(circle at 50% 0%, #0F1928 0%, #0B0E14 70%);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(11, 14, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 210, 255, 0.12);
  padding: 12px 0;
  transition: all var(--transition-fast);
}

.header-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  height: 32px;
  width: auto;
  object-fit: contain;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.header-nav a {
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

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

.nav-cta {
  background: linear-gradient(135deg, rgba(0, 210, 255, 0.15) 0%, rgba(0, 163, 255, 0.25) 100%);
  border: 1px solid var(--border-cyan) !important;
  color: var(--primary-cyan) !important;
  padding: 8px 18px;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.nav-cta:hover {
  background: var(--primary-cyan) !important;
  color: var(--navy-black) !important;
  box-shadow: 0 0 16px var(--primary-cyan-glow);
}

.nav-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #4EE2EC !important;
  font-weight: 700 !important;
}

.nav-download:hover {
  color: #FFFFFF !important;
}

.nav-cast {
  color: #4E95EC !important;
  font-weight: 700 !important;
}

.nav-cast:hover {
  color: #4EE2EC !important;
}

.nav-arrow {
  font-size: 1.1rem;
  font-weight: 800;
}

/* Hamburger Button (SP) */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1010;
  padding: 0;
}

.hamburger-bar {
  width: 100%;
  height: 2px;
  background-color: var(--primary-cyan);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.hamburger-btn.is-active .hamburger-bar:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.hamburger-btn.is-active .hamburger-bar:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.is-active .hamburger-bar:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* Hero Section */
.hero-section {
  padding-top: 60px;
  position: relative;
  overflow: hidden;
  background: #000000;
}

.hero-banner {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--navy-black);
}

.hero-img {
  width: 100%;
  height: auto;
  max-height: 85vh;
  object-fit: cover;
  object-position: center;
}

.hero-badge-bar {
  background: rgba(18, 24, 36, 0.95);
  border-top: 1px solid var(--border-cyan);
  border-bottom: 1px solid var(--border-cyan);
  padding: 14px 0;
}

.hero-badge-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px 32px;
}

.badge-item {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--primary-cyan);
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-item::before {
  content: "◆";
  font-size: 0.6rem;
  opacity: 0.7;
}

/* Common Section Container */
.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
}

.glow-accent-line {
  width: 60px;
  height: 3px;
  background: var(--primary-cyan);
  box-shadow: 0 0 12px var(--primary-cyan);
  margin: 0 auto 20px auto;
  border-radius: 2px;
}

.section-header {
  margin-bottom: 60px;
}

.section-header.center {
  text-align: center;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--text-white);
  text-transform: uppercase;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--primary-cyan);
  margin-top: 8px;
  font-weight: 500;
  letter-spacing: 0.05em;
}

/* Intro Section */
.intro-section {
  text-align: center;
  background: radial-gradient(ellipse at top, rgba(0, 210, 255, 0.08) 0%, transparent 70%);
  padding: 40px 0 20px 0;
}

/* SP Typography & Line Break Control */
.sp-only { display: none; }
.sp-space { display: none; }

.sub-caption {
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.25em;
  color: var(--primary-cyan);
  margin-bottom: 12px;
}

.main-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text-white);
  margin-bottom: 20px;
}

.highlight-text {
  background: linear-gradient(90deg, #FFFFFF 0%, var(--primary-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lead-description {
  max-width: 860px;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.85;
  word-break: keep-all;
  overflow-wrap: break-word;
}

.pc-only {
  display: inline;
}

/* Product Gallery Section */
.gallery-section {
  position: relative;
  padding-bottom: 40px;
}

.gallery-wrapper {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
}

.gallery-slider {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  gap: 24px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 8px 4px 16px 4px;
}

.gallery-slider::-webkit-scrollbar {
  display: none;
}

.gallery-card {
  flex: 0 0 calc(33.333% - 16px);
  scroll-snap-align: start;
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: 12px;
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.gallery-card:hover {
  border-color: var(--primary-cyan);
  box-shadow: 0 20px 48px rgba(0, 210, 255, 0.2);
  transform: translateY(-4px);
}

.gallery-image-box {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #080C14 0%, #121926 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 20px;
  cursor: pointer;
}

.gallery-image-box::after {
  content: "🔍 拡大表示";
  position: absolute;
  bottom: 12px;
  right: 12px;
  background: rgba(18, 24, 36, 0.85);
  border: 1px solid var(--primary-cyan);
  color: var(--primary-cyan);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  opacity: 0;
  transform: translateY(6px);
  transition: all var(--transition-fast);
  pointer-events: none;
  backdrop-filter: blur(4px);
}

.gallery-image-box:hover::after {
  opacity: 1;
  transform: translateY(0);
}

.gallery-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  filter: drop-shadow(0 10px 24px rgba(0, 0, 0, 0.6));
}

.gallery-card:hover .gallery-img {
  transform: scale(1.06);
}

.gallery-card-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(0, 210, 255, 0.18);
  border: 1px solid var(--primary-cyan);
  color: var(--primary-cyan);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border-radius: 4px;
  backdrop-filter: blur(8px);
}

.gallery-card-badge.alt {
  background: rgba(0, 163, 255, 0.2);
  border-color: #00A3FF;
  color: #00A3FF;
}

.gallery-card-info {
  padding: 20px 24px;
  text-align: center;
  flex-grow: 1;
  cursor: pointer;
}

/* ==========================================================================
   LIGHTBOX IMAGE MODAL STYLES
   ========================================================================== */
.image-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.image-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(6, 8, 13, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.modal-content {
  position: relative;
  z-index: 2010;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: scale(0.92);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.image-modal.is-open .modal-content {
  transform: scale(1);
}

.modal-close-btn {
  position: absolute;
  top: -48px;
  right: 0;
  background: rgba(18, 24, 36, 0.88);
  border: 1px solid var(--primary-cyan);
  color: var(--primary-cyan);
  font-size: 1.8rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: all var(--transition-fast);
  box-shadow: 0 0 12px var(--primary-cyan-glow);
}

.modal-close-btn:hover {
  background: var(--primary-cyan);
  color: var(--navy-black);
  transform: scale(1.1);
  box-shadow: 0 0 20px rgba(0, 210, 255, 0.5);
}

.modal-image {
  max-width: 85vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 10px;
  border: 1px solid var(--primary-cyan);
  box-shadow: 0 20px 60px rgba(0, 210, 255, 0.25);
  background: #0B0E14;
}

.modal-caption {
  margin-top: 14px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: 0.05em;
  text-align: center;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
}
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: rgba(14, 20, 32, 0.85);
  border-top: 1px solid rgba(0, 210, 255, 0.12);
}

.gallery-item-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 6px;
}

.gallery-item-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* Nav Buttons & Dots & Counter */
.gallery-nav-btn {
  display: flex;
  position: absolute;
  top: 42%;
  transform: translateY(-50%);
  z-index: 10;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(18, 24, 36, 0.92);
  border: 1px solid var(--primary-cyan);
  color: var(--primary-cyan);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px var(--primary-cyan-glow);
  transition: all var(--transition-fast);
}

.gallery-nav-btn:hover {
  background: var(--primary-cyan);
  color: var(--navy-black);
  transform: translateY(-50%) scale(1.08);
}

.gallery-nav-btn.prev {
  left: -20px;
}

.gallery-nav-btn.next {
  right: -20px;
}

.gallery-counter-wrapper {
  text-align: center;
  margin-top: 18px;
}

.gallery-counter {
  display: inline-block;
  background: rgba(18, 24, 36, 0.85);
  border: 1px solid var(--border-cyan);
  color: var(--primary-cyan);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  padding: 4px 14px;
  border-radius: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.gallery-dots {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.gallery-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(148, 163, 184, 0.3);
  border: 1px solid var(--border-cyan);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.gallery-dot.active {
  width: 24px;
  border-radius: 6px;
  background: var(--primary-cyan);
  box-shadow: 0 0 10px var(--primary-cyan-glow);
}

/* Features Section */
.features-section {
  position: relative;
}

.feature-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: 8px;
  padding: 40px;
  margin-bottom: 48px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.feature-card:hover {
  border-color: var(--primary-cyan);
  box-shadow: 0 20px 48px rgba(0, 210, 255, 0.15);
  transform: translateY(-2px);
}

.feature-card.reverse {
  grid-template-columns: 1fr 1fr;
}

.feature-card.reverse .feature-visual {
  order: 2;
}

.feature-card.reverse .feature-content {
  order: 1;
}

/* 16:9 Image Visual Container */
.feature-visual {
  width: 100%;
}

.feature-img-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #0B1420;
  border: 1px solid rgba(0, 210, 255, 0.3);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.feature-card:hover .feature-img-wrapper {
  border-color: var(--primary-cyan);
  box-shadow: 0 12px 36px var(--primary-cyan-glow);
}

.feature-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-fast);
}

.feature-card:hover .feature-img {
  transform: scale(1.03);
}

/* Feature Content */
.feature-num {
  font-size: 0.85rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  color: var(--primary-cyan);
  margin-bottom: 8px;
}

.feature-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.4;
  margin-bottom: 16px;
}

.feature-text {
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.note-text {
  display: block;
  margin-top: 10px;
  font-size: 0.85rem;
  color: #00B4D8;
}

/* Animations via Intersection Observer */
.slide-in-left,
.slide-in-right,
.slide-in-up {
  opacity: 0;
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform, opacity;
}

.slide-in-left {
  transform: translateX(-50px);
}

.slide-in-right {
  transform: translateX(50px);
}

.slide-in-up {
  transform: translateY(40px);
}

.slide-in-left.is-visible,
.slide-in-right.is-visible,
.slide-in-up.is-visible {
  opacity: 1;
  transform: translate(0, 0);
}

/* Spec Section */
.spec-section {
  background: rgba(10, 14, 22, 0.6);
  border-top: 1px solid rgba(0, 210, 255, 0.1);
  border-bottom: 1px solid rgba(0, 210, 255, 0.1);
}

.spec-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border-cyan);
  border-radius: 8px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 680px;
}

.spec-table th,
.spec-table td {
  padding: 18px 24px;
  border-bottom: 1px solid rgba(0, 210, 255, 0.12);
  vertical-align: middle;
}

.spec-label-col {
  width: 26%;
  background: rgba(15, 22, 34, 0.9);
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 700;
}

.spec-data-col {
  width: 37%;
}

.spec-table thead th {
  background: rgba(20, 28, 44, 0.95);
  border-bottom: 2px solid var(--primary-cyan);
}

.model-badge {
  display: inline-block;
  background: var(--primary-cyan);
  color: var(--navy-black);
  font-size: 0.75rem;
  font-weight: 900;
  padding: 3px 8px;
  border-radius: 3px;
  margin-bottom: 6px;
}

.model-badge.alt {
  background: #00A3FF;
  color: #FFFFFF;
}

.model-name {
  display: block;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-white);
}

.model-code {
  display: block;
  font-size: 0.85rem;
  color: var(--primary-cyan);
  font-family: monospace;
}

.spec-label {
  background: rgba(15, 22, 34, 0.7);
  font-weight: 700;
  color: var(--text-main);
  font-size: 0.92rem;
}

.jan-code {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: monospace;
}

.thin-highlight {
  color: var(--primary-cyan);
  font-weight: 700;
}

.weight-total {
  display: inline-block;
  margin-top: 4px;
  color: var(--text-white);
  font-weight: 700;
}

.spec-common {
  background: rgba(18, 26, 40, 0.55);
  text-align: center;
  color: var(--text-main);
  font-weight: 500;
  border-left: 2px solid rgba(0, 210, 255, 0.2);
  border-right: 2px solid rgba(0, 210, 255, 0.2);
}

/* Retailers / Online Stores 2-Model Split UI */
.retailers-section {
  position: relative;
  padding-bottom: 60px;
}

.models-split-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  max-width: 1140px;
  margin: 0 auto;
}

.model-shop-card {
  background: linear-gradient(145deg, #0B101B 0%, #080D17 100%);
  border: 1px solid rgba(0, 210, 255, 0.25);
  border-radius: 16px;
  padding: 32px 28px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.model-shop-card:hover {
  border-color: var(--primary-cyan);
  box-shadow: 0 20px 48px rgba(0, 210, 255, 0.18);
  transform: translateY(-3px);
}

.model-card-header {
  border-bottom: 1px solid rgba(0, 210, 255, 0.15);
  padding-bottom: 20px;
  margin-bottom: 24px;
}

.model-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--primary-cyan);
  background: rgba(0, 210, 255, 0.15);
  border: 1px solid var(--primary-cyan);
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 10px;
}

.model-tag.alt {
  color: #00A3FF;
  background: rgba(0, 163, 255, 0.18);
  border-color: #00A3FF;
}

.model-card-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.3;
  margin-bottom: 4px;
}

.model-card-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.model-shop-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.retailer-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(18, 24, 36, 0.75);
  border: 1px solid rgba(0, 210, 255, 0.22);
  border-radius: 8px;
  padding: 14px 20px;
  color: var(--text-white);
  font-size: 0.98rem;
  font-weight: 700;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.retailer-btn:hover {
  border-color: var(--primary-cyan);
  color: var(--primary-cyan);
  background: rgba(0, 210, 255, 0.14);
  box-shadow: 0 0 16px var(--primary-cyan-glow);
  transform: translateX(4px);
}

.retailer-arrow {
  color: var(--primary-cyan);
  transition: transform var(--transition-fast);
}

.retailer-btn:hover .retailer-arrow {
  transform: translateX(4px);
}

/* FAQ Section */
.faq-section {
  position: relative;
  padding-bottom: 80px;
}

.faq-accordion-wrapper {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: linear-gradient(145deg, rgba(15, 22, 34, 0.9) 0%, rgba(10, 16, 26, 0.95) 100%);
  border: 1px solid rgba(0, 210, 255, 0.2);
  border-radius: 12px;
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq-item[open] {
  border-color: var(--primary-cyan);
  box-shadow: 0 0 24px var(--primary-cyan-glow);
}

.faq-question {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 22px 26px;
  cursor: pointer;
  list-style: none;
  user-select: none;
  position: relative;
  transition: background var(--transition-fast);
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question:hover {
  background: rgba(0, 210, 255, 0.05);
}

.faq-q-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 210, 255, 0.15);
  border: 1px solid var(--primary-cyan);
  color: var(--primary-cyan);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border-radius: 4px;
  flex-shrink: 0;
}

.faq-q-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.45;
  flex-grow: 1;
}

.faq-toggle-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-cyan);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.faq-item[open] .faq-toggle-icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: flex;
  gap: 14px;
  padding: 0 26px 24px 26px;
  border-top: 1px solid rgba(0, 210, 255, 0.1);
  margin-top: 4px;
  padding-top: 20px;
}

.faq-a-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 153, 0, 0.15);
  border: 1px solid #FF9900;
  color: #FF9900;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border-radius: 4px;
  flex-shrink: 0;
  height: fit-content;
}

.faq-a-content {
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--text-main);
  flex-grow: 1;
}

.faq-a-content p {
  margin-bottom: 10px;
}

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

.faq-a-content kbd {
  background: rgba(0, 210, 255, 0.15);
  border: 1px solid var(--primary-cyan);
  color: #FFFFFF;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
}

.faq-lead-text {
  margin-bottom: 14px;
}

.faq-sub-block {
  background: rgba(10, 16, 26, 0.6);
  border-left: 3px solid var(--primary-cyan);
  padding: 12px 16px;
  border-radius: 0 6px 6px 0;
  margin-bottom: 12px;
}

.faq-sub-block:last-child {
  margin-bottom: 0;
}

.faq-sub-title {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--primary-cyan);
  margin-bottom: 4px;
}

.faq-img-wrapper {
  margin-top: 16px;
  border-radius: 8px;
  border: 1px solid rgba(0, 210, 255, 0.25);
  background: #0b1420;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.faq-connection-img {
  max-width: 100%;
  max-height: 480px;
  object-fit: contain;
  margin: 0 auto;
  display: block;
  cursor: zoom-in;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.faq-connection-img:hover {
  opacity: 0.95;
  transform: scale(1.01);
}

.faq-footer-note {
  margin-top: 24px;
  padding: 16px 20px;
  background: rgba(0, 210, 255, 0.06);
  border: 1px dashed rgba(0, 210, 255, 0.3);
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  text-align: center;
}

/* FAQ Answer Bottom Close Button */
.faq-close-wrapper {
  display: flex;
  justify-content: flex-end;
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px dashed rgba(0, 210, 255, 0.15);
  width: 100%;
}

.faq-close-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 210, 255, 0.08);
  border: 1px solid var(--border-cyan);
  color: var(--primary-cyan);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.faq-close-btn:hover {
  background: var(--primary-cyan);
  color: var(--navy-black);
  box-shadow: 0 0 12px var(--primary-cyan-glow);
  transform: translateY(-1px);
}

/* Footer Enterprise Modal Trigger Button */
.footer-enterprise-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid rgba(0, 210, 255, 0.4);
  border-radius: 4px;
  color: var(--primary-cyan);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 6px 14px;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 0 10px rgba(0, 210, 255, 0.1);
}

.footer-enterprise-btn:hover {
  border-color: var(--primary-cyan);
  color: #FFFFFF;
  background: rgba(0, 210, 255, 0.15);
  box-shadow: 0 0 18px var(--primary-cyan-glow);
  transform: translateX(3px);
}

/* Enterprise Adoption Modal Overlay & White B2B Card Box */
.enterprise-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.enterprise-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.ent-modal-content {
  position: relative;
  width: 100%;
  max-width: 960px;
  max-height: 85vh;
  overflow-y: auto;
  background-color: #FFFFFF;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.58), rgba(255, 255, 255, 0.58)),
    url("https://www.uniqstyle.co.jp/products/PROMETHEUS/cast2/img/b2b_dis.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border: 1px solid rgba(15, 23, 42, 0.15);
  border-radius: 16px;
  padding: 40px 36px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  color: #334155;
  scrollbar-width: thin;
  scrollbar-color: #0284C7 #F1F5F9;
}

.ent-modal-content .modal-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 100;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  border-radius: 50%;
  font-size: 1.6rem;
  font-weight: 700;
  background: #F1F5F9;
  color: #1E293B;
  border: 1px solid #CBD5E1;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  line-height: 1;
  transition: all var(--transition-fast);
}

.ent-modal-content .modal-close-btn:hover {
  background: #0284C7;
  color: #FFFFFF;
  border-color: #0284C7;
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.35);
  transform: scale(1.08);
}

/* Modal Bottom Close Actions */
.ent-modal-bottom-close {
  display: flex;
  justify-content: center;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid rgba(15, 23, 42, 0.12);
  width: 100%;
}

.ent-modal-bottom-close-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #0284C7;
  color: #FFFFFF;
  font-size: 1rem;
  font-weight: 800;
  padding: 12px 36px;
  min-height: 48px;
  border-radius: 30px;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(2, 132, 199, 0.3);
  transition: all var(--transition-fast);
  width: 100%;
  max-width: 280px;
}

.ent-modal-bottom-close-btn:hover {
  background: #0369A1;
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.4);
  transform: translateY(-1px);
}

.img-modal-bottom-close-btn {
  margin-top: 14px;
  background: rgba(0, 210, 255, 0.12);
  border: 1px solid var(--border-cyan);
  color: var(--primary-cyan);
  font-size: 0.88rem;
  font-weight: 700;
  padding: 8px 24px;
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.img-modal-bottom-close-btn:hover {
  background: var(--primary-cyan);
  color: var(--navy-black);
}

.ent-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: #FFFFFF;
  background: #0284C7;
  border: 1px solid #0284C7;
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.ent-header-card {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(15, 23, 42, 0.1);
  border-radius: 12px;
  padding: 24px 28px;
  margin-bottom: 24px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.ent-header-card .ent-title {
  color: #0f172a;
  font-size: 24px;
  font-weight: 700;
  margin: 12px 0 8px 0;
}

.ent-header-card .ent-lead {
  color: #334155;
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
  text-align: center;
}

.ent-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.ent-card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(15, 23, 42, 0.12);
  border-radius: 12px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
  backdrop-filter: blur(8px);
  transition: all var(--transition-fast);
}

.ent-card:hover {
  border-color: #0284C7;
  background: #FFFFFF;
  box-shadow: 0 8px 24px rgba(2, 132, 199, 0.15);
  transform: translateY(-2px);
}

.ent-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.ent-card-num {
  font-size: 0.85rem;
  font-weight: 900;
  color: #FFFFFF;
  background: #0284C7;
  padding: 2px 8px;
  border-radius: 4px;
  font-family: monospace;
}

.ent-card-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: #0F172A;
}

.ent-card-desc {
  font-size: 0.9rem;
  line-height: 1.65;
  color: #475569;
  margin-bottom: 14px;
}

.ent-card-records {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed rgba(15, 23, 42, 0.15);
  font-size: 0.86rem;
  line-height: 1.6;
  color: #334155;
}

.ent-record-label {
  font-weight: 700;
  color: #0284C7;
  display: inline-block;
  margin-bottom: 2px;
}

/* Modal Header Top Bar with Logos */
.ent-modal-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.ent-modal-logos {
  display: flex;
  align-items: center;
  gap: 14px;
}

.ent-logo-brand {
  height: 28px;
  width: auto;
  object-fit: contain;
}

.ent-logo-sdgs {
  height: 30px;
  width: auto;
  object-fit: contain;
}

/* Modal Media Coverage Section */
.ent-media-section {
  margin-top: 36px;
  padding-top: 32px;
  border-top: 1px solid rgba(15, 23, 42, 0.15);
}

.ent-media-sec-header {
  text-align: center;
  margin-bottom: 24px;
}

.ent-badge.alt {
  background: #0284C7;
  color: #FFFFFF;
}

.ent-media-sec-title {
  font-size: 1.5rem;
  font-weight: 900;
  color: #0F172A;
  margin-top: 6px;
}

.ent-media-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.ent-media-card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(15, 23, 42, 0.12);
  border-radius: 12px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.05);
  transition: all var(--transition-fast);
}

.ent-media-card:hover {
  border-color: #0284C7;
  box-shadow: 0 8px 24px rgba(2, 132, 199, 0.15);
  transform: translateY(-2px);
}

.ent-media-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: #0284C7;
  background: rgba(2, 132, 199, 0.1);
  padding: 3px 8px;
  border-radius: 3px;
  margin-bottom: 10px;
}

.ent-media-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: #0F172A;
  line-height: 1.45;
  margin-bottom: 8px;
}

.ent-media-text {
  font-size: 0.88rem;
  line-height: 1.65;
  color: #475569;
  margin-bottom: 16px;
}

.ent-media-sub {
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.6;
  color: #334155;
  margin-bottom: 16px;
}

.ent-media-card-action {
  margin-top: auto;
}

.ent-media-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: #0284C7;
  color: #FFFFFF;
  font-size: 0.88rem;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: 6px;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.ent-media-btn:hover {
  background: #0369A1;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.35);
  transform: translateY(-1px);
}

/* CTA Section */
.cta-section {
  padding: 60px 24px;
}

.cta-card {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(18, 24, 36, 0.9) 0%, rgba(10, 20, 35, 0.95) 100%);
  border: 1px solid var(--primary-cyan);
  border-radius: 12px;
  padding: 48px 32px;
  text-align: center;
  box-shadow: 0 0 30px rgba(0, 210, 255, 0.15);
  overflow: hidden;
}

.cta-glow {
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  height: 200px;
  background: radial-gradient(circle, var(--primary-cyan-glow) 0%, transparent 70%);
  pointer-events: none;
}

.cta-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 12px;
}

.cta-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 28px;
}

.btn-primary-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--primary-cyan);
  color: var(--navy-black);
  font-weight: 800;
  font-size: 1.05rem;
  padding: 16px 36px;
  border-radius: 6px;
  box-shadow: 0 0 20px var(--primary-cyan-glow);
  transition: all var(--transition-fast);
}

.btn-primary-cta:hover {
  background: #FFFFFF;
  color: var(--navy-black);
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(255, 255, 255, 0.4);
}

/* Footer Section */
.site-footer {
  background: var(--navy-black);
  border-top: 1px solid rgba(0, 210, 255, 0.15);
  padding: 60px 0 30px 0;
  color: var(--text-muted);
}

/* Footer Cast Internal Link Banner */
.footer-cast-banner-wrapper {
  margin-bottom: 48px;
}

.footer-cast-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(135deg, rgba(16, 24, 40, 0.9) 0%, rgba(8, 14, 26, 0.95) 100%);
  border: 1px solid rgba(78, 226, 236, 0.3);
  border-radius: 12px;
  padding: 28px 36px;
  text-decoration: none;
  transition: all var(--transition-fast);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  position: relative;
  overflow: hidden;
}

.footer-cast-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, #4EE2EC 0%, #4E95EC 100%);
  opacity: 0.7;
}

.footer-cast-card:hover {
  border-color: #4EE2EC;
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(78, 226, 236, 0.25);
}

.cast-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: #4EE2EC;
  background: rgba(78, 226, 236, 0.12);
  padding: 3px 10px;
  border-radius: 3px;
  margin-bottom: 8px;
}

.cast-title {
  font-size: 1.8rem;
  font-weight: 900;
  color: #FFFFFF;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.cast-grad {
  font-weight: 900;
  background: linear-gradient(90deg, #4EE2EC 0%, #4E95EC 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.cast-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(90deg, rgba(78, 226, 236, 0.15) 0%, rgba(78, 149, 236, 0.2) 100%);
  border: 1px solid #4EE2EC;
  color: #4EE2EC;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 12px 24px;
  border-radius: 6px;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.footer-cast-card:hover .cast-btn {
  background: linear-gradient(90deg, #4EE2EC 0%, #4E95EC 100%);
  color: var(--navy-black);
  box-shadow: 0 0 20px rgba(78, 226, 236, 0.4);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 32px;
}

.footer-logo {
  height: 36px;
  width: auto;
  margin-bottom: 12px;
}

.footer-company {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

.footer-col-title {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-cyan);
  margin-bottom: 12px;
}

.footer-btn {
  display: inline-block;
  border: 1px solid var(--border-cyan);
  padding: 8px 20px;
  border-radius: 4px;
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.footer-btn:hover {
  border-color: var(--primary-cyan);
  color: var(--primary-cyan);
  background: rgba(0, 210, 255, 0.08);
}

.footer-btn-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.footer-enterprise-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-cyan);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 4px 0;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.footer-enterprise-link:hover {
  color: #FFFFFF;
  text-shadow: 0 0 12px var(--primary-cyan-glow);
  transform: translateX(4px);
}

.footer-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  margin: 40px 0 24px 0;
}

.footer-bottom {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.82rem;
  color: #64748B;
}

/* Responsive Design */
@media (max-width: 992px) {
  .hamburger-btn {
    display: flex;
  }

  .header-nav {
    display: none;
    position: fixed;
    top: 56px;
    left: 0;
    width: 100%;
    background: rgba(11, 14, 20, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-cyan);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    align-items: flex-start;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.85);
    z-index: 999;
  }

  .header-nav.is-active {
    display: flex;
  }

  .header-nav .nav-link,
  .header-nav .nav-cta {
    width: 100%;
    font-size: 1rem;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .header-nav .nav-cta {
    border-bottom: none;
    text-align: center;
    margin-top: 10px;
  }

  .footer-cast-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    padding: 24px 20px;
  }

  .cast-btn {
    width: 100%;
    justify-content: center;
  }
  .gallery-card {
    flex: 0 0 calc(50% - 12px);
  }

  .feature-card,
  .feature-card.reverse {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 28px;
  }

  .feature-card.reverse .feature-visual {
    order: 1;
  }

  .feature-card.reverse .feature-content {
    order: 2;
  }

  .main-title {
    font-size: 1.75rem;
  }

  .section-title {
    font-size: 1.9rem;
  }
}

@media (max-width: 768px) {
  .header-nav {
    display: none;
  }

  .hero-badge-container {
    gap: 8px 16px;
  }

  .badge-item {
    font-size: 0.75rem;
  }

  .section-container {
    padding: 48px 16px;
  }

  .feature-card {
    padding: 20px;
    margin-bottom: 32px;
  }

  .feature-title {
    font-size: 1.2rem;
  }

  .feature-text {
    font-size: 0.95rem;
  }

  .cta-card {
    padding: 32px 18px;
  }

  .cta-title {
    font-size: 1.4rem;
  }

  .footer-top {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  /* SP Typography & Line Break Control */
  .sp-only { display: inline; }
  .sp-space { display: block; height: 10px; } /* 段落間の適切な余白 */

  /* タイトルの文字溢れ防止 */
  .hero-title,
  .main-title {
    font-size: clamp(20px, 6vw, 26px) !important; /* 画面幅に合わせて自動最適化 */
    line-height: 1.45 !important;
    word-break: keep-all !important; /* 単語の途中改行を防止 */
    overflow-wrap: break-word !important;
    margin-bottom: 16px !important;
  }

  /* リード文 */
  .hero-lead {
    font-size: 16px !important;
    line-height: 1.6 !important;
    margin: 20px auto 16px auto !important;
    text-align: center !important;
    color: var(--text-white) !important;
    font-weight: 700 !important;
  }

  /* 本文 */
  .hero-body,
  .lead-description {
    font-size: 13.5px !important;
    line-height: 1.8 !important;
    text-align: center !important;
    padding: 0 10px !important;
    color: var(--text-muted) !important;
  }

  /* Gallery SP Carousel */
  .gallery-wrapper {
    overflow-x: hidden;
    max-width: 100%;
  }

  .gallery-card {
    flex: 0 0 100%;
  }

  .gallery-nav-btn.prev {
    left: 4px;
  }

  .gallery-nav-btn.next {
    right: 4px;
  }

  /* Prevent Mobile Horizontal Scroll / Shift */
  html, body {
    overflow-x: hidden !important;
    max-width: 100% !important;
  }

  main, section, header, footer,
  .section-container, .hero-section, .hero-banner, .header-container,
  .footer-container, .models-split-container, .ent-modal-content {
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  /* Retailers SP Grid / Split UI */
  .models-split-container {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .model-shop-card {
    padding: 24px 20px;
  }

  .retailer-btn {
    padding: 12px 16px;
    font-size: 0.92rem;
  }

  /* Enterprise Adoption Cards & Modal SP 1-Column Responsive */
  .ent-modal-content {
    padding: 24px 16px !important;
    max-height: 90vh !important;
    border-radius: 12px !important;
    position: relative !important;
  }

  .ent-modal-content .modal-close-btn,
  .modal-close-btn {
    top: 12px !important;
    right: 12px !important;
    width: 44px !important;
    height: 44px !important;
    min-width: 44px !important;
    min-height: 44px !important;
    font-size: 1.6rem !important;
    z-index: 100 !important;
  }

  .ent-grid,
  .ent-media-grid {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
  }

  .ent-card,
  .ent-media-card {
    width: 100% !important;
    padding: 18px 14px !important;
  }

  .ent-card-header {
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
    margin-bottom: 10px !important;
  }

  .ent-card-num {
    flex-shrink: 0 !important;
  }

  .ent-card-title {
    font-size: 1.05rem !important;
    font-weight: 800 !important;
    line-height: 1.4 !important;
    color: #0F172A !important;
    word-break: auto-phrase !important;
    overflow-wrap: break-word !important;
    white-space: normal !important;
  }

  .ent-card-desc,
  .ent-card-records {
    font-size: 0.88rem !important;
    line-height: 1.6 !important;
  }

  /* FAQ Answer Mobile Layout */
  .faq-answer {
    padding: 0 16px 18px 16px;
    gap: 10px;
  }

  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 48px;
    height: 48px;
  }
}

/* ==========================================================================
   Back to Top Button
   ========================================================================== */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(10, 16, 26, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(0, 210, 255, 0.4);
  color: var(--primary-cyan);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  padding: 0;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background: rgba(18, 28, 44, 0.95);
  border-color: var(--primary-cyan);
  box-shadow: 0 0 16px rgba(0, 210, 255, 0.6);
  transform: translateY(-3px);
}

.back-to-top .arrow {
  font-size: 0.75rem;
  line-height: 1;
  margin-bottom: 2px;
}

.back-to-top .label {
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1;
}