/* ==========================================================================
   Design System & Base Variables
   ========================================================================== */
:root {
  /* Colors - Highly saturated curated palette */
  --bg-deep-navy: #020617;
  --bg-space-dark: #090d26;
  --color-primary: #00f0ff;       /* Electric Cyan */
  --color-secondary: #0066ff;     /* Vivid Cobalt */
  --color-accent-green: #00f2fe;   /* Bright Turquoise */
  --color-accent-emerald: #00ffa3; /* Neon Emerald */
  --color-accent-purple: #c026d3;  /* Deep Magenta */
  --color-accent-pink: #db2777;    /* Electric Pink */
  --color-white: #ffffff;
  --color-silver: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-border-glow: rgba(0, 240, 255, 0.25);

  /* Fonts - Premium Distinctive Typography */
  --font-family-body: 'Outfit', 'Noto Sans JP', sans-serif;
  --font-family-display: 'Space Grotesk', sans-serif;
  --font-family-accent: 'Syncopate', sans-serif;

  /* Layout */
  --container-max-width: 1200px;
  --header-height: 80px;

  /* Transitions */
  --transition-smooth: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-bounce: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-deep-navy);
  color: var(--color-silver);
  font-family: var(--font-family-body);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
}

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

/* ==========================================================================
   Galaxy & Space Ambient Background
   ========================================================================== */
.space-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  overflow: hidden;
  background: radial-gradient(circle at 50% 50%, #060a24 0%, #020617 100%);
}

.stars {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle, #ffffff 1px, transparent 1.5px),
    radial-gradient(circle, rgba(255, 255, 255, 0.7) 0.8px, transparent 1.2px);
  background-size: 600px 600px, 400px 400px;
  background-position: 0 0, 250px 150px;
  opacity: 0.25;
  animation: starScroll 180s linear infinite;
}

/* Twinkle Stars Layer - Sharp dots with slow twinkle */
.stars-twinkle {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle, #ffffff 1.2px, transparent 1.8px),
    radial-gradient(circle, var(--color-primary) 1px, transparent 1.5px),
    radial-gradient(circle, var(--color-accent-pink) 1px, transparent 1.5px);
  background-size: 500px 500px, 450px 450px, 380px 380px;
  background-position: 80px 120px, 280px 70px, 150px 250px;
  opacity: 0.5;
  animation: starsTwinkle 6s ease-in-out infinite alternate;
}

.dot-grid {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(rgba(0, 240, 255, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle, black 30%, transparent 95%);
  -webkit-mask-image: radial-gradient(circle, black 30%, transparent 95%);
  z-index: -1;
}

/* Rotating Galaxy System */
.galaxy-container {
  position: fixed;
  top: 5%;
  right: -15%;
  width: 75vw;
  max-width: 1000px;
  aspect-ratio: 1;
  pointer-events: none;
  opacity: 0.28;
  mix-blend-mode: screen;
  z-index: -1.5;
  filter: drop-shadow(0 0 50px rgba(0, 240, 255, 0.15));
  animation: galaxyRotate 200s linear infinite;
}

.galaxy-svg {
  width: 100%;
  height: 100%;
}

/* Shooting Stars system */
.shooting-stars {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1.2;
  overflow: hidden;
}

.shooting-star {
  position: absolute;
  width: 150px;
  height: 2px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 1) 0%, rgba(0, 240, 255, 0.5) 40%, transparent 100%);
  opacity: 0;
  border-radius: 50%;
  filter: drop-shadow(0 0 4px rgba(0, 240, 255, 0.5));
}

/* Shoot Animations */
@keyframes shoot {
  0% {
    transform: rotate(-30deg) translateX(0);
    opacity: 0;
  }
  1% {
    opacity: 1;
  }
  8% {
    transform: rotate(-30deg) translateX(-600px);
    opacity: 0;
  }
  100% {
    transform: rotate(-30deg) translateX(-600px);
    opacity: 0;
  }
}

.s-1 { top: 10%; right: 10%; animation: shoot 9s linear infinite; animation-delay: 0s; }
.s-2 { top: 35%; right: -5%; animation: shoot 12s linear infinite; animation-delay: 3s; width: 200px; }
.s-3 { top: 5%; right: 40%; animation: shoot 15s linear infinite; animation-delay: 7s; width: 120px; }
.s-4 { top: 55%; right: 20%; animation: shoot 11s linear infinite; animation-delay: 11s; width: 170px; }

/* Deep Nebula Clouds */
.nebula {
  position: absolute;
  border-radius: 50%;
  filter: blur(150px);
  opacity: 0.18;
  mix-blend-mode: screen;
  pointer-events: none;
}

.nebula-1 {
  top: -10%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
  animation: floatNebula 30s ease-in-out infinite alternate;
}

.nebula-2 {
  bottom: -10%;
  left: -10%;
  width: 70vw;
  height: 70vw;
  background: radial-gradient(circle, var(--color-accent-purple) 0%, transparent 70%);
  animation: floatNebula 40s ease-in-out infinite alternate-reverse;
}

.nebula-3 {
  top: 40%;
  left: 30%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, var(--color-secondary) 0%, transparent 70%);
  opacity: 0.12;
  animation: floatNebula 25s ease-in-out infinite alternate;
}

/* Floating Digital Orbs */
.space-orb {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  pointer-events: none;
  mix-blend-mode: color-dodge;
  animation: floatOrb 20s ease-in-out infinite alternate;
}

.orb-1 {
  background: var(--color-accent-emerald);
  top: 15%;
  left: 10%;
}

.orb-2 {
  background: var(--color-accent-pink);
  bottom: 20%;
  right: 15%;
  animation-delay: -5s;
}

.orb-3 {
  background: var(--color-primary);
  top: 60%;
  left: 50%;
  animation-delay: -10s;
}

.glowing-lines {
  position: absolute;
  width: 100%;
  height: 100%;
  background: 
    linear-gradient(90deg, rgba(0, 240, 255, 0.015) 1px, transparent 1px),
    linear-gradient(rgba(0, 240, 255, 0.015) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(circle, black 40%, transparent 80%);
  -webkit-mask-image: radial-gradient(circle, black 40%, transparent 80%);
}

@keyframes starScroll {
  0% { transform: translateY(0); }
  100% { transform: translateY(-450px); }
}

@keyframes starsTwinkle {
  0%, 100% { opacity: 0.3; transform: scale(0.95); }
  50% { opacity: 0.85; transform: scale(1.05); }
}

@keyframes galaxyRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes floatNebula {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(6%, 8%) scale(1.15); }
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(50px, -30px) scale(1.2); }
  100% { transform: translate(-30px, 50px) scale(0.8); }
}

/* ==========================================================================
   Reusable UI Components
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-header {
  margin-bottom: 72px;
}

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

.section-sub {
  font-family: var(--font-family-accent);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-primary);
  letter-spacing: 0.4em;
  display: inline-block;
  margin-bottom: 16px;
  position: relative;
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
}

.section-title {
  font-family: var(--font-family-body);
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.3;
  color: var(--color-white);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 400;
}

/* Buttons with Aurora flow background */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family-display);
  font-weight: 700;
  font-size: 1rem;
  padding: 16px 36px;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  z-index: 1;
  letter-spacing: 0.05em;
}

.btn-sm {
  padding: 10px 24px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 18px 48px;
  font-size: 1.15rem;
  letter-spacing: 0.08em;
}

.btn-wide {
  min-width: 280px;
  max-width: 100%;
}

.hero-cta-btn,
.final-cta-btn {
  box-shadow: 0 6px 30px rgba(0, 240, 255, 0.45);
  transition: var(--transition-bounce) !important;
}

.hero-cta-btn:hover,
.final-cta-btn:hover {
  transform: translateY(-4px) scale(1.04) !important;
  box-shadow: 0 12px 40px rgba(0, 240, 255, 0.65), 0 0 25px rgba(192, 38, 211, 0.45) !important;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 50%, var(--color-accent-purple) 100%);
  background-size: 200% auto;
  color: var(--color-white);
  box-shadow: 0 4px 25px rgba(0, 240, 255, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 35px rgba(0, 240, 255, 0.55), 0 0 15px rgba(192, 38, 211, 0.3);
  background-position: right center; /* Swaps gradient color dynamically */
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.03);
  color: var(--color-white);
  border: 1.5px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(15px);
}

.btn-secondary:hover {
  background: rgba(0, 240, 255, 0.08);
  border-color: var(--color-primary);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.25);
  transform: translateY(-3px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid rgba(0, 240, 255, 0.4);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: rgba(0, 240, 255, 0.05);
  border-color: var(--color-primary);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.35);
  transform: translateY(-3px);
}

.w-full {
  width: 100%;
}

/* Neon Pulse Animation */
.neon-pulse {
  animation: neonPulse 2.5s infinite alternate;
}

@keyframes neonPulse {
  0% {
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.3), 0 0 20px rgba(0, 240, 255, 0.1);
  }
  100% {
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.6), 0 0 35px rgba(0, 240, 255, 0.3), 0 0 15px rgba(0, 255, 163, 0.4);
  }
}

/* Badge */
.badge {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  color: var(--color-primary);
  border-radius: 30px;
  font-family: var(--font-family-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 28px;
  text-transform: uppercase;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.15) inset;
}

/* Scroll Animation classes */
.fade-in-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in-up.active {
  opacity: 1;
  transform: translateY(0);
}

.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }

/* ==========================================================================
   Header Section
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 100;
  transition: var(--transition-smooth);
}

.site-header.scrolled {
  background: rgba(2, 6, 23, 0.75);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 240, 255, 0.15);
  height: 70px;
}

.header-container {
  max-width: var(--container-max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  font-weight: 900;
  cursor: pointer;
}

.logo-sub {
  font-family: var(--font-family-accent);
  font-size: 0.7rem;
  color: var(--color-primary);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.logo-main {
  font-size: 1.5rem;
  color: var(--color-white);
  letter-spacing: 0.01em;
}

.header-nav ul {
  display: flex;
  gap: 36px;
}

.header-nav a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.header-nav a:hover {
  color: var(--color-primary);
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 6px;
  z-index: 110;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  transition: var(--transition-smooth);
}

/* ==========================================================================
   01. Hero / First View
   ========================================================================== */
.hero-section {
  padding-top: calc(var(--header-height) + 80px);
  padding-bottom: 120px;
  position: relative;
  overflow: hidden;
}

.hero-container {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 48px;
  align-items: center;
}

.hero-title {
  font-size: 4.5rem;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.title-top {
  display: block;
  color: var(--color-white);
}

.title-bottom {
  display: block;
  font-size: 4.2rem;
  position: relative;
}

/* Silver text styling with metallic glow */
.silver-text {
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 45%, #94a3b8 55%, #ffffff 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 10px rgba(255,255,255,0.18));
  animation: shineText 6s linear infinite;
}

/* Huge Glowing Blue gradient for AI */
.gradient-ai {
  font-family: var(--font-family-display);
  font-size: 5.6rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary) 0%, #8b5cf6 50%, var(--color-accent-pink) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 25px rgba(0, 240, 255, 0.45));
  margin-right: 8px;
  animation: shineText 4s linear infinite alternate;
}

@keyframes shineText {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

.hero-subtitle {
  font-size: 1.2rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 48px;
}

.hero-appeals {
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin-bottom: 48px;
}

.appeal-item {
  display: flex;
  gap: 20px;
  align-items: center;
}

.appeal-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.2), 0 0 10px rgba(0, 240, 255, 0.1) inset;
}

.appeal-icon-wrap i {
  width: 22px;
  height: 22px;
}

.appeal-text h3 {
  font-size: 1.1rem;
  color: var(--color-white);
  margin-bottom: 4px;
}

.appeal-text p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.cta-group {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
}

.cta-group.align-center {
  justify-content: center;
}

.cta-caption {
  font-family: var(--font-family-display);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
  opacity: 0.8;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cta-caption::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--color-accent-emerald);
  animation: pulseLight 1.5s infinite alternate;
}

@keyframes pulseLight {
  0% { transform: scale(0.8); opacity: 0.5; }
  100% { transform: scale(1.3); opacity: 1; }
}

/* Visual Panel in Hero (Device Mockups + Mic + Wave) */
.hero-visual {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.visual-wrapper {
  position: relative;
  width: 100%;
  max-width: 600px;
  aspect-ratio: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.mic-circle-bg {
  position: absolute;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.15) 0%, transparent 70%);
  border: 1px dashed rgba(0, 240, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: pulseRotate 25s linear infinite;
  z-index: 1;
}

.glowing-mic {
  width: 52px;
  height: 52px;
  color: var(--color-primary);
  filter: drop-shadow(0 0 20px var(--color-primary));
  animation: floatUp 4s ease-in-out infinite alternate;
}

/* Sound Waves Ripple left and right */
.wave-container {
  position: absolute;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  opacity: 0.25;
}

.wave-bar {
  width: 5px;
  height: 24px;
  background-color: var(--color-primary);
  border-radius: 10px;
  animation: soundWave 1.4s ease-in-out infinite alternate;
}

/* Vary animation delays for wave-bars to simulate voice input */
.wave-bar:nth-child(1) { height: 15px; animation-delay: 0.1s; }
.wave-bar:nth-child(2) { height: 40px; animation-delay: 0.4s; }
.wave-bar:nth-child(3) { height: 55px; animation-delay: 0.7s; }
.wave-bar:nth-child(4) { height: 30px; animation-delay: 0.2s; }
.wave-bar:nth-child(5) { height: 70px; animation-delay: 0.9s; }
.wave-bar:nth-child(6) { height: 12px; animation-delay: 0.5s; }
.wave-bar:nth-child(7) { height: 25px; animation-delay: 0.3s; }
.wave-bar:nth-child(8) { height: 50px; animation-delay: 0.6s; }
.wave-bar:nth-child(9) { height: 65px; animation-delay: 0.2s; }
.wave-bar:nth-child(10) { height: 35px; animation-delay: 0.5s; }
.wave-bar:nth-child(11) { height: 18px; animation-delay: 0.4s; }
.wave-bar:nth-child(12) { height: 45px; animation-delay: 0.8s; }

/* 3 スマホ画面の重ね配置 */
.device-mockups {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: flex-end;
}

.mockup-img {
  position: absolute;
  width: 56%;
  border-radius: 0;
  border: none;
  box-shadow: none;
  filter: drop-shadow(0 15px 30px rgba(2, 6, 23, 0.8));
  transition: var(--transition-bounce);
  z-index: 2;
  bottom: 0;
}

.mockup-left {
  left: -4%;
  transform: rotate(-4deg) translateY(20px);
  z-index: 1;
}

.mockup-right {
  right: -4%;
  transform: rotate(4deg) translateY(20px);
  z-index: 1;
}

.mockup-center {
  z-index: 3;
  width: 60%;
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  border: none;
  box-shadow: none;
  filter: drop-shadow(0 20px 40px rgba(0, 240, 255, 0.35));
}

.device-mockups:hover .mockup-left {
  transform: rotate(-2deg) translateX(-12px) translateY(10px);
}

.device-mockups:hover .mockup-right {
  transform: rotate(2deg) translateX(12px) translateY(10px);
}

.device-mockups:hover .mockup-center {
  transform: translateX(-50%) translateY(-25px) scale(1.03);
  filter: drop-shadow(0 25px 50px rgba(0, 240, 255, 0.5));
}

@keyframes pulseRotate {
  0% { transform: scale(1) rotate(0deg); opacity: 0.6; }
  50% { transform: scale(1.08) rotate(180deg); opacity: 1; }
  100% { transform: scale(1) rotate(360deg); opacity: 0.6; }
}

@keyframes soundWave {
  0% { transform: scaleY(0.35); }
  100% { transform: scaleY(1.3); }
}

@keyframes floatUp {
  0% { transform: translateY(0); }
  100% { transform: translateY(-10px); }
}

/* ==========================================================================
   02. 共感・課題提起セクション
   ========================================================================== */
.problem-section {
  padding: 120px 0;
  position: relative;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 56px;
}

/* Glassmorphism Space card with fine border glow */
.problem-card {
  background: rgba(9, 13, 38, 0.4);
  border: 1.5px solid rgba(0, 240, 255, 0.12);
  padding: 44px;
  border-radius: 24px;
  backdrop-filter: blur(20px);
  transition: var(--transition-smooth);
  box-shadow: 0 15px 45px rgba(2, 6, 23, 0.7);
  position: relative;
  overflow: hidden;
}

.problem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.08) 0%, transparent 100%);
  opacity: 0;
  transition: var(--transition-smooth);
}

/* Hologram light line overlay */
.problem-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40px;
  height: 40px;
  border-right: 1.5px solid rgba(0, 240, 255, 0);
  border-top: 1.5px solid rgba(0, 240, 255, 0);
  transition: var(--transition-smooth);
}

.problem-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 240, 255, 0.4);
  box-shadow: 0 20px 50px rgba(0, 240, 255, 0.18), 0 0 1px 1px rgba(0, 240, 255, 0.25) inset;
}

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

.problem-card:hover::after {
  border-color: var(--color-primary);
  width: 60px;
  height: 60px;
}

.card-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  margin-bottom: 28px;
  transition: var(--transition-smooth);
}

.problem-card:hover .card-icon {
  background: rgba(0, 240, 255, 0.1);
  border-color: rgba(0, 240, 255, 0.5);
  color: var(--color-primary);
  box-shadow: 0 0 20px rgba(0, 240, 240, 0.35);
  transform: scale(1.08) rotate(3deg);
}

.card-icon i {
  width: 26px;
  height: 26px;
}

.problem-card h3 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
}

.problem-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   03. 解決セクション
   ========================================================================== */
.solution-section {
  padding: 120px 0;
  position: relative;
}

.solution-content {
  margin-top: 80px;
}

.solution-orbit {
  position: relative;
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  aspect-ratio: 16/9;
  display: flex;
  justify-content: center;
  align-items: center;
}

.orbit-center {
  position: relative;
  width: 420px;
  z-index: 10;
}

.orbit-device {
  width: 100%;
  border-radius: 0;
  border: none;
  box-shadow: none;
  filter: drop-shadow(0 15px 30px rgba(2, 6, 23, 0.8));
}

.orbit-bg-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.18) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
}

.orbit-card {
  position: absolute;
  background: rgba(9, 13, 38, 0.55);
  border: 1.5px solid rgba(0, 240, 255, 0.12);
  border-radius: 20px;
  padding: 28px;
  width: 270px;
  backdrop-filter: blur(15px);
  display: flex;
  gap: 18px;
  align-items: flex-start;
  transition: var(--transition-smooth);
  z-index: 12;
  box-shadow: 0 10px 30px rgba(2, 6, 23, 0.5);
}

.orbit-card:hover {
  transform: translateY(-8px) scale(1.03);
  border-color: var(--color-primary);
  box-shadow: 0 15px 35px rgba(0, 240, 255, 0.25);
}

.orbit-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(0, 240, 255, 0.08);
  border: 1.5px solid rgba(0, 240, 255, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.2) inset;
}

.orbit-icon i {
  width: 22px;
  height: 22px;
}

.orbit-text h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 8px;
}

.orbit-text p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Placement around orbit center - Closed positioning */
.card-1 {
  top: 5%;
  left: 2%;
}

.card-2 {
  bottom: 5%;
  left: 2%;
}

.card-3 {
  top: 30%;
  right: 2%;
}

/* Background elements for solution */
.solution-section::after {
  content: '';
  position: absolute;
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.25), transparent);
  bottom: 0;
  left: 20%;
}

/* ==========================================================================
   04. 使い方セクション
   ========================================================================== */
.steps-section {
  padding: 120px 0;
  position: relative;
}

.steps-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 64px;
}

/* Cockpit panel card style with futuristic bracket borders */
.step-card {
  flex: 1;
  background: radial-gradient(120% 120% at 0% 0%, rgba(9, 13, 38, 0.7) 0%, rgba(9, 13, 38, 0.4) 100%);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  padding: 48px 36px;
  text-align: center;
  position: relative;
  transition: var(--transition-smooth);
  backdrop-filter: blur(20px);
}

/* Corner Bracket design for Cockpit panel */
.step-card::before, .step-card::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-color: rgba(0, 240, 255, 0.3);
  border-style: solid;
  transition: var(--transition-smooth);
}

.step-card::before {
  top: 14px;
  left: 14px;
  border-width: 1.5px 0 0 1.5px;
}

.step-card::after {
  bottom: 14px;
  right: 14px;
  border-width: 0 1.5px 1.5px 0;
}

.step-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 45px rgba(0, 240, 255, 0.15);
  border-color: rgba(0, 240, 255, 0.2);
}

.step-card:hover::before, .step-card:hover::after {
  border-color: var(--color-primary);
  width: 24px;
  height: 24px;
}

.step-num {
  font-family: var(--font-family-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.15em;
  margin-bottom: 28px;
}

.step-icon {
  width: 76px;
  height: 76px;
  border-radius: 22px;
  background: rgba(0, 240, 255, 0.04);
  border: 1px solid rgba(0, 240, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin: 0 auto 28px;
  box-shadow: 0 10px 25px rgba(2, 6, 23, 0.5), 0 0 12px rgba(0, 240, 255, 0.1) inset;
  transition: var(--transition-smooth);
}

.step-card:hover .step-icon {
  background: var(--color-primary);
  color: var(--bg-deep-navy);
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
  transform: scale(1.08) rotate(4deg);
}

.step-icon i {
  width: 34px;
  height: 34px;
}

.step-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 14px;
}

.step-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.step-arrow {
  color: rgba(0, 240, 255, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: pulseArrow 2.5s infinite;
}

.step-arrow i {
  width: 36px;
  height: 36px;
}

@keyframes pulseArrow {
  0%, 100% { transform: translateX(0); opacity: 0.3; }
  50% { transform: translateX(8px); opacity: 0.9; }
}

.steps-bottom-copy {
  margin-top: 64px;
  font-size: 1.3rem;
  color: var(--color-white);
}

.steps-bottom-copy strong {
  color: var(--color-primary);
  font-weight: 800;
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

/* ==========================================================================
   05. 機能一覧セクション
   ========================================================================== */
.features-section {
  padding: 120px 0;
  position: relative;
}

.features-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  align-items: center;
  margin-top: 72px;
}

.features-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Solar System planet arrangement */
.solar-system {
  position: relative;
  width: 100%;
  max-width: 560px;
  aspect-ratio: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.sun {
  width: 280px;
  z-index: 10;
  position: relative;
}

.solar-device {
  width: 100%;
  border-radius: 0;
  border: none;
  box-shadow: none;
  filter: drop-shadow(0 15px 30px rgba(2, 6, 23, 0.8));
}

.orbit {
  position: absolute;
  border-radius: 50%;
  border: 1px dashed rgba(0, 240, 255, 0.2);
  display: flex;
  justify-content: center;
  align-items: center;
  pointer-events: none;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.03);
}

.orbit-path-1 {
  width: 440px;
  height: 440px;
  animation: orbitSpin 40s linear infinite;
}

.orbit-path-2 {
  width: 580px;
  height: 580px;
  animation: orbitSpin 60s linear infinite reverse;
}

.planet {
  position: absolute;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--bg-space-dark);
  border: 1.5px solid rgba(0, 240, 255, 0.4);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  pointer-events: auto;
  transition: var(--transition-bounce);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.15);
}

/* Custom Planet Colors */
.p-vital   { border-color: var(--color-accent-pink); color: var(--color-accent-pink); box-shadow: 0 0 12px rgba(219,39,119,0.25); }
.p-toilet  { border-color: var(--color-accent-emerald); color: var(--color-accent-emerald); box-shadow: 0 0 12px rgba(0,255,163,0.25); }
.p-meal    { border-color: #f59e0b; color: #f59e0b; box-shadow: 0 0 12px rgba(245,158,11,0.25); }
.p-water   { border-color: var(--color-primary); color: var(--color-primary); }
.p-bath    { border-color: var(--color-accent-purple); color: var(--color-accent-purple); box-shadow: 0 0 12px rgba(192,38,211,0.25); }

.p-medicine { border-color: var(--color-accent-emerald); color: var(--color-accent-emerald); }
.p-record   { border-color: #f59e0b; color: #f59e0b; }
.p-note     { border-color: var(--color-accent-pink); color: var(--color-accent-pink); }
.p-handover { border-color: var(--color-primary); color: var(--color-primary); }
.p-info     { border-color: var(--color-accent-purple); color: var(--color-accent-purple); }

.planet i {
  width: 20px;
  height: 20px;
}

.planet:hover {
  background: currentColor;
  color: var(--bg-deep-navy) !important;
  box-shadow: 0 0 25px currentColor;
  transform: scale(1.2) rotate(15deg);
}

.planet::after {
  content: attr(data-label);
  position: absolute;
  bottom: -32px;
  left: 50%;
  transform: translateX(-50%) scale(0.8);
  background: rgba(9, 13, 38, 0.9);
  color: var(--color-white);
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  border: 1px solid rgba(0, 240, 255, 0.35);
  opacity: 0;
  transition: var(--transition-smooth);
  pointer-events: none;
  white-space: nowrap;
  box-shadow: 0 5px 15px rgba(2, 6, 23, 0.4);
}

.planet:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

/* Arrange planets around the paths */
.p-vital   { top: 0; left: 50%; transform: translate(-50%, -50%); }
.p-toilet  { top: 50%; right: 0; transform: translate(50%, -50%); }
.p-meal    { bottom: 0; left: 50%; transform: translate(-50%, 50%); }
.p-water   { top: 50%; left: 0; transform: translate(-50%, -50%); }
.p-bath    { top: 15%; left: 15%; transform: translate(-50%, -50%); }

.p-medicine { top: 0; left: 50%; transform: translate(-50%, -50%); }
.p-record   { top: 50%; right: 0; transform: translate(50%, -50%); }
.p-note     { bottom: 0; left: 50%; transform: translate(-50%, 50%); }
.p-handover { top: 50%; left: 0; transform: translate(-50%, -50%); }
.p-info     { top: 15%; right: 15%; transform: translate(50%, -50%); }

@keyframes orbitSpin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.features-list-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.feature-item-pill {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 28px;
  border-radius: 50px;
  font-family: var(--font-family-display);
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--color-white);
  transition: var(--transition-smooth);
}

.feature-item-pill i {
  color: var(--color-primary);
  width: 22px;
  height: 22px;
}

.feature-item-pill:hover {
  background: rgba(0, 240, 255, 0.06);
  border-color: rgba(0, 240, 255, 0.35);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
  transform: translateX(8px);
}

/* ==========================================================================
   06. 多言語対応セクション
   ========================================================================== */
.multilingual-section {
  padding: 100px 0;
  position: relative;
}

.multilingual-content {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 64px;
  align-items: center;
  margin-top: 72px;
}

/* Visual Translation Flow */
.multilingual-product-image {
  width: 100%;
  max-width: 500px;
  height: auto;
  border-radius: 0;
  border: none;
  box-shadow: none;
  filter: drop-shadow(0 15px 30px rgba(2, 6, 23, 0.8));
  display: block;
  margin: 0 auto;
}

/* Points list */
.multi-points {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.point-card {
  display: flex;
  gap: 22px;
  background: rgba(9, 13, 38, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: 28px;
  border-radius: 20px;
  transition: var(--transition-smooth);
}

.point-card:hover {
  border-color: var(--color-primary);
  background: rgba(9, 13, 38, 0.55);
  transform: translateX(8px);
  box-shadow: 0 10px 25px rgba(0, 240, 255, 0.1);
}

.point-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(0, 240, 255, 0.08);
  border: 1.5px solid rgba(0, 240, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.2) inset;
}

.point-icon i {
  width: 24px;
  height: 24px;
}

.point-body h3 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 8px;
}

.point-body p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   07. 導入後の変化セクション
   ========================================================================== */
.changes-section {
  padding: 120px 0;
  position: relative;
}

.changes-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 64px;
  align-items: center;
  margin-top: 72px;
}

.changes-visual {
  display: flex;
  justify-content: center;
}

.scene-center-frame {
  position: relative;
  width: 100%;
  max-width: 400px;
  border-radius: 28px;
  padding: 8px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-purple) 100%);
  box-shadow: 0 25px 60px rgba(2, 6, 23, 0.9), 0 0 40px rgba(0, 240, 255, 0.4);
}

.scene-svg,
.scene-img {
  width: 100%;
  display: block;
  border-radius: 20px;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.scene-overlay-label {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(2, 6, 23, 0.85);
  border: 1.5px solid rgba(0, 240, 255, 0.3);
  color: var(--color-white);
  padding: 10px 24px;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 800;
  backdrop-filter: blur(10px);
  letter-spacing: 0.05em;
  box-shadow: 0 5px 15px rgba(0,240,255,0.2);
}

.changes-list {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.change-card {
  background: rgba(9, 13, 38, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  padding: 28px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
  transition: var(--transition-smooth);
  backdrop-filter: blur(10px);
}

.change-card:hover {
  background: rgba(9, 13, 38, 0.7);
  border-color: var(--color-primary);
  box-shadow: 0 15px 35px rgba(0, 240, 255, 0.15);
  transform: translateY(-4px);
}

.change-num {
  font-family: var(--font-family-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
}

.change-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 8px;
}

.change-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   08. Before / After セクション
   ========================================================================== */
.comparison-section {
  padding: 120px 0;
  position: relative;
}

.comparison-container {
  display: grid;
  grid-template-columns: 1fr 80px 1fr;
  align-items: center;
  margin-top: 72px;
  background: rgba(9, 13, 38, 0.35);
  border: 1.5px solid rgba(255, 255, 255, 0.05);
  border-radius: 28px;
  padding: 48px;
  backdrop-filter: blur(15px);
  box-shadow: 0 25px 55px rgba(2, 6, 23, 0.8);
}

.comparison-pane {
  border-radius: 20px;
  padding: 40px;
  height: 100%;
}

.before-pane {
  background: rgba(255, 255, 255, 0.01);
  border: 1.5px dashed rgba(255, 255, 255, 0.08);
}

.after-pane {
  background: rgba(0, 240, 255, 0.02);
  border: 1.5px solid rgba(0, 240, 255, 0.2);
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.08);
}

.pane-header {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.before-pane .pane-header i {
  color: var(--color-text-muted);
}

.after-pane .pane-header i {
  color: var(--color-accent-emerald);
  filter: drop-shadow(0 0 8px var(--color-accent-emerald));
}

.comp-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.comp-row:last-child {
  border-bottom: none;
}

.comp-label {
  font-family: var(--font-family-display);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.comp-row p {
  font-size: 1rem;
  color: var(--color-silver);
}

.comp-row p.highlight-after {
  color: var(--color-white);
  font-weight: 800;
}

/* Portal Gate in comparison center */
.comparison-gate {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-primary);
  position: relative;
}

.gate-sparkle {
  position: absolute;
  width: 2px;
  height: 85%;
  background: linear-gradient(180deg, transparent 0%, var(--color-primary) 50%, transparent 100%);
  filter: drop-shadow(0 0 5px var(--color-primary));
}

.comparison-gate i {
  background: var(--bg-deep-navy);
  border: 1.5px solid rgba(0, 240, 255, 0.35);
  border-radius: 50%;
  padding: 10px;
  z-index: 2;
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
}

/* ==========================================================================
   09. 活用シーンセクション
   ========================================================================== */
.scenes-section {
  padding: 120px 0;
  position: relative;
}

.scenes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 64px;
}

/* Spaceship circular window style cards */
.scene-card {
  background: rgba(9, 13, 38, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 24px;
  padding: 40px 28px;
  text-align: center;
  transition: var(--transition-smooth);
  backdrop-filter: blur(10px);
}

.scene-card:hover {
  transform: translateY(-10px);
  border-color: var(--color-primary);
  background: rgba(9, 13, 38, 0.75);
  box-shadow: 0 20px 45px rgba(0, 240, 255, 0.15);
}

.scene-window {
  width: 110px;
  height: 110px;
  margin: 0 auto 28px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.window-circle {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  border: 2px solid rgba(0, 240, 255, 0.3);
  background: var(--bg-space-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  box-shadow: 0 6px 18px rgba(2, 6, 23, 0.6), 0 0 0 6px rgba(0, 240, 255, 0.06);
  transition: var(--transition-bounce);
}

.scene-card:hover .window-circle {
  background: var(--color-primary);
  color: var(--bg-deep-navy);
  border-color: var(--color-primary);
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.5), 0 0 0 8px rgba(0, 240, 255, 0.2);
  transform: scale(1.06);
}

.scene-icon {
  width: 32px;
  height: 32px;
}

.scene-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 14px;
}

.scene-card p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   10. 選ばれる理由セクション
   ========================================================================== */
.reasons-section {
  padding: 120px 0;
  position: relative;
}

.reasons-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 64px;
}

/* Diagonal layout stack design with glassy shine */
.reason-card {
  background: linear-gradient(135deg, rgba(9, 13, 38, 0.65) 0%, rgba(9, 13, 38, 0.3) 100%);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 20px;
  padding: 40px 28px;
  transition: var(--transition-bounce);
  position: relative;
  backdrop-filter: blur(15px);
}

/* Stagger cards visually */
.reasons-grid .reason-card:nth-child(even) {
  transform: translateY(24px);
}

.reason-card:hover {
  transform: translateY(-8px) !important;
  border-color: var(--color-primary);
  box-shadow: 0 20px 45px rgba(0, 240, 255, 0.2);
}

.reason-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

.reason-num {
  font-family: var(--font-family-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.04);
  line-height: 1;
}

.reason-card:hover .reason-num {
  color: rgba(0, 240, 255, 0.08);
}

.reason-header i {
  color: var(--color-primary);
  width: 26px;
  height: 26px;
}

.reason-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 14px;
}

.reason-card p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   11. よくある質問セクション
   ========================================================================== */
.faq-section {
  padding: 120px 0;
  position: relative;
}

.faq-accordion {
  max-width: 840px;
  margin: 64px auto 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.faq-item {
  background: rgba(9, 13, 38, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.faq-item:hover {
  border-color: rgba(0, 240, 255, 0.3);
  background: rgba(9, 13, 38, 0.65);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 28px 36px;
  text-align: left;
  color: var(--color-white);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.faq-icon {
  color: var(--color-primary);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
}

.faq-icon i {
  width: 22px;
  height: 22px;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.faq-answer-content {
  padding: 0 36px 28px;
  color: var(--color-text-muted);
  font-size: 0.98rem;
  line-height: 1.7;
}

/* ==========================================================================
   12. 最終CTAセクション
   ========================================================================== */
.final-cta-section {
  padding: 120px 0 160px;
  position: relative;
}

.cta-inner {
  background: radial-gradient(110% 110% at 50% 0%, rgba(0, 240, 255, 0.16) 0%, rgba(9, 13, 38, 0.8) 100%);
  border: 1.5px solid rgba(0, 240, 255, 0.3);
  border-radius: 40px;
  padding: 96px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 30px 70px rgba(2, 6, 23, 0.95), 0 0 45px rgba(0, 240, 255, 0.25);
}

.cta-sparkles-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.cta-visual-group {
  margin: 48px auto;
  position: relative;
  width: 220px;
  height: 220px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.mic-pulsing-container {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
  box-shadow: 0 0 35px rgba(0, 240, 255, 0.6);
}

.final-cta-mic {
  width: 44px;
  height: 44px;
  color: var(--bg-deep-navy);
}

.pulse-ring {
  position: absolute;
  border: 1.5px solid var(--color-primary);
  border-radius: 50%;
  animation: pulseRipple 3.5s linear infinite;
  opacity: 0;
}

.r1 { animation-delay: 0s; }
.r2 { animation-delay: 1.1s; }
.r3 { animation-delay: 2.2s; }

@keyframes pulseRipple {
  0% { width: 110px; height: 110px; opacity: 0.8; }
  100% { width: 330px; height: 330px; opacity: 0; }
}

.cta-floating-icons {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
}

.floating-icon {
  position: absolute;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(9, 13, 38, 0.85);
  border: 1.5px solid rgba(0, 240, 255, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  box-shadow: 0 6px 18px rgba(2, 6, 23, 0.6);
  animation: floatIcon 4.5s ease-in-out infinite alternate;
}

.fi-1 { top: 12%; left: -15px; animation-delay: 0s; }
.fi-2 { bottom: 12%; right: -15px; animation-delay: 1.2s; }
.fi-3 { top: 45%; right: -35px; animation-delay: 2.4s; }

@keyframes floatIcon {
  0% { transform: translateY(0) rotate(0deg); }
  100% { transform: translateY(-15px) rotate(12deg); }
}

.cta-final-logo {
  margin-top: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-weight: 900;
  font-size: 1.8rem;
}

.cta-final-logo .logo-sub {
  font-size: 1.7rem;
  color: var(--color-white);
}

.cta-final-logo .logo-main {
  font-size: 2rem;
  color: var(--color-primary);
  margin-right: 0;
}

/* ==========================================================================
   13. フッター
   ========================================================================== */
.site-footer {
  background: #010208;
  border-top: 1px solid rgba(255,255,255,0.04);
  padding: 96px 0 40px;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  gap: 64px;
  margin-bottom: 72px;
}

.footer-brand {
  max-width: 340px;
}

.footer-brand .logo {
  margin-bottom: 28px;
}

.company-name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 10px;
}

.address {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.footer-links {
  display: flex;
  gap: 80px;
}

.link-group h4 {
  font-family: var(--font-family-display);
  font-size: 1rem;
  color: var(--color-white);
  margin-bottom: 24px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.link-group ul {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.link-group a {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.link-group a:hover {
  color: var(--color-primary);
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.3);
}

.footer-ext-icon {
  width: 14px;
  height: 14px;
  display: inline-block;
  vertical-align: middle;
  margin-left: 3px;
}

.tel-no {
  font-family: var(--font-family-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
  display: flex;
  align-items: center;
  gap: 10px;
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

.tel-no i {
  color: var(--color-primary);
  width: 22px;
  height: 22px;
}

.tel-caption {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding-top: 40px;
  display: flex;
  justify-content: center;
}

.copyright {
  font-family: var(--font-family-display);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Modal Styles
   ========================================================================== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(2, 6, 23, 0.85);
  backdrop-filter: blur(15px);
}

.modal-content {
  position: relative;
  background: var(--bg-space-dark);
  border: 1.5px solid rgba(0, 240, 255, 0.35);
  border-radius: 28px;
  width: 100%;
  max-width: 560px;
  padding: 56px;
  box-shadow: 0 30px 70px rgba(2, 6, 23, 0.95), 0 0 40px rgba(0, 240, 255, 0.25);
  z-index: 2;
  transform: scale(0.92);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  max-height: 90vh;
  overflow-y: auto;
}

.modal.active .modal-content {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: var(--transition-smooth);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  color: var(--color-white);
  transform: rotate(90deg);
}

.modal-close i {
  width: 26px;
  height: 26px;
}

.modal-header {
  margin-bottom: 40px;
  text-align: center;
}

.modal-title {
  font-size: 1.75rem;
  color: var(--color-white);
  font-weight: 800;
  margin-bottom: 10px;
}

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

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.form-group label {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-white);
}

.form-group label .required {
  background: var(--color-accent-pink);
  color: var(--color-white);
  padding: 3px 8px;
  border-radius: 5px;
  font-size: 0.72rem;
  margin-left: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(2, 6, 23, 0.6);
  border: 1.5px solid rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  font-family: var(--font-family-body);
  padding: 14px 18px;
  border-radius: 10px;
  font-size: 0.98rem;
  transition: var(--transition-smooth);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.25);
  background: rgba(2, 6, 23, 0.85);
}

.form-submit {
  margin-top: 12px;
}

/* ==========================================================================
   Responsive Media Queries
   ========================================================================== */

/* ==========================================================================
   モバイル GPU 高速化：重いエフェクトをまとめて無効化
   .is-mobile クラスが付いた端末（スマホ・タブレット）では
   ブラー、アニメーション、backdrop-filter をすべてカット
   ========================================================================== */
html.is-mobile .nebula,
body.is-mobile .nebula {
  filter: none !important;
  animation: none !important;
  opacity: 0.08 !important;
}

html.is-mobile .galaxy-container,
body.is-mobile .galaxy-container {
  animation: none !important;
  display: none !important;
}

html.is-mobile .shooting-stars,
body.is-mobile .shooting-stars {
  display: none !important;
}

html.is-mobile .space-orb,
body.is-mobile .space-orb {
  filter: none !important;
  animation: none !important;
  opacity: 0.06 !important;
  mix-blend-mode: normal !important;
}

html.is-mobile .stars,
body.is-mobile .stars {
  animation: none !important;
}

html.is-mobile .stars-twinkle,
body.is-mobile .stars-twinkle {
  animation: none !important;
}

/* backdrop-filter を完全に無効化（スクロール・ペイント負荷を大幅削減） */
html.is-mobile *,
body.is-mobile * {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}

/* サウンドウェーブ、マイク、オービット等のアニメーションを停止 */
html.is-mobile .wave-bar,
body.is-mobile .wave-bar {
  animation: none !important;
  height: 24px !important;
}
html.is-mobile .mic-circle-bg,
body.is-mobile .mic-circle-bg {
  animation: none !important;
}
html.is-mobile .glowing-mic,
body.is-mobile .glowing-mic {
  animation: none !important;
}
html.is-mobile .orbit,
body.is-mobile .orbit {
  animation: none !important;
}
html.is-mobile .neon-pulse,
body.is-mobile .neon-pulse {
  animation: none !important;
}
html.is-mobile .pulse-ring,
body.is-mobile .pulse-ring {
  animation: none !important;
  display: none;
}
html.is-mobile .floating-icon,
body.is-mobile .floating-icon {
  animation: none !important;
}
html.is-mobile .final-cta-mic,
body.is-mobile .final-cta-mic {
  animation: none !important;
}

@media (max-width: 1024px) {
  #intro-overlay {
    display: none !important;
  }

  /* Force display main content on mobile/tablet even if intro-active is somehow applied */
  body.intro-active .site-header,
  body.intro-active main,
  body.intro-active .space-background {
    opacity: 1 !important;
    filter: blur(0) !important;
    transform: scale(1) !important;
  }
  html.intro-active,
  body.intro-active {
    overflow: auto !important;
    height: auto !important;
  }


  .hero-container {
    grid-template-columns: 1fr;
    gap: 72px;
    text-align: center;
  }

  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .cta-group {
    justify-content: center;
  }

  .hero-title {
    font-size: 3.8rem;
  }

  .title-bottom {
    font-size: 3.5rem;
  }

  .hero-appeals {
    align-items: flex-start;
  }

  .features-layout {
    grid-template-columns: 1fr;
    gap: 72px;
  }

  .features-visual {
    order: -1;
  }

  .multilingual-content {
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .changes-layout {
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .changes-visual {
    order: -1;
  }

  .scenes-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .reasons-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .reasons-grid .reason-card:nth-child(even) {
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .site-header {
    height: 70px;
  }

  .header-nav {
    display: none;
  }

  .header-cta {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .hero-title {
    font-size: 2.8rem;
  }

  .title-bottom {
    font-size: 2.6rem;
  }

  .gradient-ai {
    font-size: 3.5rem;
  }

  .problem-grid {
    grid-template-columns: 1fr;
  }

  .solution-orbit {
    aspect-ratio: auto;
    flex-direction: column;
    gap: 48px;
    height: auto;
  }

  .orbit-center {
    width: 200px;
    margin: 0 auto;
  }

  .orbit-card {
    position: static;
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
  }

  .steps-grid {
    flex-direction: column;
    gap: 20px;
  }

  .step-arrow {
    transform: rotate(90deg);
    padding: 10px 0;
  }

  .solar-system {
    max-width: 360px;
  }

  .orbit-path-1 {
    width: 260px;
    height: 260px;
  }

  .orbit-path-2 {
    width: 320px;
    height: 320px;
  }

  .sun {
    width: 130px;
  }

  .planet {
    width: 38px;
    height: 38px;
  }

  .planet i {
    width: 16px;
    height: 16px;
  }

  .features-list-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }

  .feature-item-pill {
    padding: 12px 10px;
    font-size: 0.78rem;
    gap: 6px;
    border-radius: 14px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 72px;
  }

  .feature-item-pill i {
    width: 20px;
    height: 20px;
  }

  .feature-item-pill:hover {
    transform: none;
  }



  .comparison-container {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 28px;
  }

  .comparison-gate {
    height: 48px;
  }

  .gate-sparkle {
    width: 85%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  }

  .comparison-gate i {
    transform: rotate(90deg);
  }

  .scenes-grid {
    grid-template-columns: 1fr;
  }

  .reasons-grid {
    grid-template-columns: 1fr;
  }

  .cta-inner {
    padding: 56px 24px;
  }

  .footer-container {
    flex-direction: column;
    gap: 48px;
  }

  .footer-links {
    flex-direction: column;
    gap: 40px;
  }

  .modal-content {
    padding: 40px 24px;
  }
}

/* ==========================================================================
   Intro Transition & Main Fade-in Styles
   ========================================================================== */
/* Initial state of main elements during intro */
body.intro-active .site-header,
body.intro-active main,
body.intro-active .space-background {
  opacity: 0;
  filter: blur(12px);
  transform: scale(1.15); /* Start from scaled up state (zooming out) */
}

body.intro-active main {
  transform: scale(1.15);
  transform-origin: 25% 35%; /* Center of zoom is near the hero title (添付箇所) */
}

/* Smooth transition for main content elements */
.site-header, main, .space-background {
  transition: opacity 2.0s cubic-bezier(0.16, 1, 0.3, 1), 
              transform 2.0s cubic-bezier(0.16, 1, 0.3, 1),
              filter 2.0s cubic-bezier(0.16, 1, 0.3, 1);
}

body.intro-finished .site-header,
body.intro-finished main,
body.intro-finished .space-background {
  opacity: 1;
  filter: blur(0);
  transform: scale(1);
}

/* Hero section animations triggered by CSS directly to avoid JS block */
body.intro-finished .hero-section .fade-in-up,
body:not(.intro-active) .hero-section .fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  animation: heroFadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

body.intro-finished .hero-section .fade-in-up.delay-100,
body:not(.intro-active) .hero-section .fade-in-up.delay-100 { animation-delay: 0.1s; }
body.intro-finished .hero-section .fade-in-up.delay-200,
body:not(.intro-active) .hero-section .fade-in-up.delay-200 { animation-delay: 0.2s; }
body.intro-finished .hero-section .fade-in-up.delay-300,
body:not(.intro-active) .hero-section .fade-in-up.delay-300 { animation-delay: 0.3s; }
body.intro-finished .hero-section .fade-in-up.delay-400,
body:not(.intro-active) .hero-section .fade-in-up.delay-400 { animation-delay: 0.4s; }

@keyframes heroFadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* モバイル・タブレット環境におけるトランジションの完全無効化 */
html.is-mobile,
body.is-mobile,
html.is-mobile body {
  overflow: auto !important;
  height: auto !important;
}

html.is-mobile #intro-overlay,
body.is-mobile #intro-overlay {
  display: none !important;
}

html.is-mobile .site-header,
html.is-mobile main,
html.is-mobile .space-background,
body.is-mobile .site-header,
body.is-mobile main,
body.is-mobile .space-background,
body.is-mobile.intro-active .site-header,
body.is-mobile.intro-active main,
body.is-mobile.intro-active .space-background {
  opacity: 1 !important;
  filter: none !important;
  transform: none !important;
  transition: none !important;
}

/* ==========================================================================
   Intro Video Overlay Styles
   ========================================================================== */
#intro-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(circle at 50% 50%, #060a24 0%, #020617 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 99999;
  transition: opacity 1.5s cubic-bezier(0.16, 1, 0.3, 1), 
              visibility 1.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 1.5s cubic-bezier(0.16, 1, 0.3, 1),
              filter 1.5s cubic-bezier(0.16, 1, 0.3, 1);
  opacity: 1;
  visibility: visible;
  transform: scale(1);
  filter: blur(0);
  overflow: hidden;
}

#intro-overlay.fade-out {
  opacity: 0;
  visibility: hidden;
  transform: scale(1.08); /* Zooms in slightly as it fades */
  filter: blur(15px);     /* Blurs out dynamically */
}

.intro-video-container {
  position: relative;
  width: auto;
  height: auto;
  max-width: 90vw;
  max-height: 80vh;
  border-radius: 20px;
  overflow: hidden;
  background: #000;
  border: 1px solid rgba(0, 240, 255, 0.3);
  box-shadow: 0 20px 80px rgba(0, 240, 255, 0.25), 0 0 40px rgba(192, 38, 211, 0.1);
  transition: transform 1.2s cubic-bezier(0.25, 1, 0.5, 1);
  display: flex;
  justify-content: center;
  align-items: center;
}

#intro-overlay.fade-out .intro-video-container {
  transform: scale(0.92);
}

#intro-video {
  max-width: 100%;
  max-height: 80vh;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}

/* Controls Layer */
.intro-controls {
  position: absolute;
  bottom: 24px;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 0 32px;
  z-index: 10;
  pointer-events: none; /* Let clicks pass through to video if needed, but buttons will override */
}

.intro-btn {
  background: rgba(5, 15, 36, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1.5px solid rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  padding: 12px 24px;
  border-radius: 30px;
  font-family: var(--font-family-body);
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  pointer-events: auto; /* Re-enable pointer events for buttons */
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.intro-btn i {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
}

.intro-btn:hover {
  background: rgba(0, 240, 255, 0.15);
  border-color: var(--color-primary);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.35), 0 4px 15px rgba(0, 0, 0, 0.4);
  transform: translateY(-2px);
}

#intro-skip-btn:hover {
  background: rgba(192, 38, 211, 0.15);
  border-color: var(--color-accent-purple);
  box-shadow: 0 0 25px rgba(192, 38, 211, 0.35), 0 4px 15px rgba(0, 0, 0, 0.4);
}

#intro-skip-btn i {
  color: var(--color-accent-purple);
}

/* Play Fallback Button */
.intro-play-btn {
  position: absolute;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  border: none;
  color: var(--color-white);
  padding: 18px 36px;
  border-radius: 50px;
  font-family: var(--font-family-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  z-index: 20;
  box-shadow: 0 10px 30px rgba(0, 240, 255, 0.4);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.intro-play-btn i {
  width: 24px;
  height: 24px;
}

.intro-play-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 40px rgba(0, 240, 255, 0.6);
}

/* Brand Overlay Text (Outside Video) */
.intro-brand-overlay {
  position: absolute;
  top: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  color: rgba(255, 255, 255, 0.85);
  font-family: var(--font-family-body);
  pointer-events: none;
  text-align: center;
}


.intro-brand-company {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  opacity: 0.7;
  margin-bottom: 2px;
}

.intro-brand-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, var(--color-primary), var(--color-white));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 10px rgba(0, 240, 255, 0.3));
}

/* Lock scrolling on body while intro is active - Fixed for iOS Safari */
html.intro-active,
body.intro-active {
  overflow: hidden !important;
  height: 100% !important;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .intro-video-container {
    width: auto;
    height: auto;
    max-width: 95vw;
    max-height: 75vh;
    border-radius: 12px;
  }
  #intro-video {
    max-height: 75vh;
  }
  .intro-brand-overlay {
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
  }
  .intro-brand-company {
    font-size: 0.65rem;
    letter-spacing: 0.1em;
  }
  .intro-brand-title {
    font-size: 0.95rem;
  }
  .intro-controls {
    padding: 0 16px;
    bottom: 16px;
    gap: 12px; /* Minimum 8px gap for touch safety */
  }
  .intro-btn {
    padding: 10px 20px;
    font-size: 0.85rem;
    min-height: 44px; /* WCAG 2.2 Target Size compliant */
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .intro-btn i {
    width: 16px;
    height: 16px;
  }
  .intro-play-btn {
    padding: 14px 28px;
    font-size: 0.95rem;
    min-height: 48px; /* Recommended primary target size */
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .mobile-menu-toggle {
    min-height: 44px; /* Ensure 44px minimum target for hamburger */
    min-width: 44px;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  /* Ported from main_ai.js & optimized for touch targets */
  .header-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background: rgba(5, 15, 36, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid rgba(0, 210, 255, 0.2);
    padding: 100px 40px;
    transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 90;
    display: block !important; /* Override display: none */
  }
  .header-nav.mobile-active {
    right: 0;
  }
  .header-nav ul {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }
  .header-nav li {
    width: 100%;
  }
  .header-nav a {
    font-size: 1.2rem;
    color: var(--color-white);
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 44px; /* Touch target minimum */
    padding: 8px 0;
  }

  /* Footer Links touch target optimization */
  .link-group ul {
    gap: 8px;
  }
  .link-group a {
    display: inline-flex;
    align-items: center;
    min-height: 44px; /* Touch target minimum */
    width: 100%;
    padding: 6px 0;
  }
}

/* ==========================================================================
   Product Video Section Styles
   ========================================================================== */
.video-section {
  padding: 120px 0;
  position: relative;
  z-index: 1;
}

.video-wrapper-outer {
  max-width: 960px;
  margin: 0 auto;
  border-radius: 24px;
  overflow: hidden;
  background: #000;
  border: 1px solid rgba(0, 240, 255, 0.25);
  box-shadow: 0 30px 100px rgba(0, 240, 255, 0.15), 0 0 50px rgba(192, 38, 211, 0.05);
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), 
              box-shadow 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.video-wrapper-outer:hover {
  transform: translateY(-6px) scale(1.015);
  border-color: var(--color-primary);
  box-shadow: 0 40px 120px rgba(0, 240, 255, 0.35), 0 0 60px rgba(192, 38, 211, 0.2);
}

.video-wrapper-inner {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
}

.video-wrapper-inner iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

@media (max-width: 768px) {
  .video-section {
    padding: 80px 0;
  }
  .video-wrapper-outer {
    border-radius: 16px;
    margin: 0 16px;
  }
}

/* ==========================================================================
   Smartphone Specific Layout Adjustments (max-width: 480px)
   ========================================================================== */
@media (max-width: 480px) {
  /* Typography scales to prevent overflow and excessive wrapping */
  .hero-title {
    font-size: 2.2rem;
  }
  .title-bottom {
    font-size: 2.0rem;
  }
  .gradient-ai {
    font-size: 2.6rem;
  }
  .hero-subtitle {
    font-size: 1.0rem;
    margin-bottom: 36px;
  }
  .hero-appeals {
    margin-bottom: 36px;
    gap: 16px;
  }
  .appeal-item {
    gap: 12px;
  }

  /* Solar system orbital scaling to prevent horizontal overflow */
  .solar-system {
    max-width: 280px;
  }
  .orbit-path-1 {
    width: 200px;
    height: 200px;
  }
  .orbit-path-2 {
    width: 260px;
    height: 260px;
  }
  .sun {
    width: 100px;
  }
  .planet {
    width: 32px;
    height: 32px;
  }
  .planet i {
    width: 14px;
    height: 14px;
  }
  .planet::after {
    bottom: -28px;
    font-size: 0.65rem;
    padding: 3px 6px;
  }

  /* Adjust padding and layout widths on tiny screens */
  .container {
    padding: 0 16px;
  }
  .section-header {
    margin-bottom: 48px;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .comparison-container {
    padding: 24px 16px;
  }
  .comparison-pane {
    padding: 24px 16px;
  }
  .modal-content {
    padding: 40px 16px 24px;
  }
  .form-group label {
    font-size: 0.82rem;
  }
  .form-group input, 
  .form-group select, 
  .form-group textarea {
    padding: 12px 14px;
    font-size: 0.9rem;
  }
}