/* =====================================================
   SKY LENS – Main Stylesheet
   White / Black / Blue base design
   ===================================================== */

/* ---------- CSS Variables ---------- */
:root {
  --clr-black:    #0a0a0a;
  --clr-dark:     #111216;
  --clr-dark-2:   #1a1c22;
  --clr-dark-3:   #242730;
  --clr-light:    #f5f6f8;
  --clr-white:    #ffffff;
  --clr-blue:     #1a6cff;
  --clr-blue-dark:#0f4fd4;
  --clr-blue-light:#3d85ff;
  --clr-blue-glow:rgba(26,108,255,0.25);
  --clr-gray:     #6b7280;
  --clr-gray-2:   #9ca3af;
  --clr-border-dark: rgba(255,255,255,0.08);
  --clr-border-light: rgba(0,0,0,0.1);

  --font-en:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-ja:  'Noto Sans JP', 'Yu Gothic', 'YuGothic', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;

  --max-w: 1200px;
  --header-h: 72px;

  --ease-out-expo: cubic-bezier(0.19,1,0.22,1);
  --ease-in-out:   cubic-bezier(0.4,0,0.2,1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  font-family: var(--font-ja);
  background: var(--clr-dark);
  color: var(--clr-white);
  line-height: 1.7;
  overflow-x: hidden;
  max-width: 100vw;
  -webkit-font-smoothing: antialiased;
}

img, video { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: inherit; }
ul { list-style: none; }

/* ---------- Utility ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.center { text-align: center; }
.mt-lg  { margin-top: 56px; }
.w-full { width: 100%; }

.section-dark  { background: var(--clr-dark);  padding: 120px 0; }
.section-light { background: var(--clr-light); padding: 120px 0; color: var(--clr-black); }

.section-label {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--clr-blue);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.section-label.center { text-align: center; }

.section-title {
  font-family: var(--font-ja);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 24px;
}
.section-title .accent { color: var(--clr-blue); }
.section-title.center  { text-align: center; }

.section-desc {
  font-size: 1rem;
  color: var(--clr-white);
  max-width: 560px;
  margin: 0 auto 64px;
  line-height: 1.8;
}
.section-light .section-desc { color: var(--clr-black); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.05em;
  border-radius: 4px;
  border: 2px solid transparent;
  transition: all 0.25s var(--ease-in-out);
  white-space: nowrap;
}

.btn-primary {
  background: var(--clr-blue);
  color: var(--clr-white);
  border-color: var(--clr-blue);
}
.btn-primary:hover {
  background: var(--clr-blue-dark);
  border-color: var(--clr-blue-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--clr-blue-glow);
}

.btn-outline {
  background: transparent;
  color: var(--clr-dark);
  border-color: var(--clr-dark);
}
.btn-outline:hover {
  background: var(--clr-dark);
  color: var(--clr-white);
  transform: translateY(-2px);
}

.btn-outline-light {
  background: transparent;
  color: var(--clr-white);
  border-color: rgba(255,255,255,0.5);
}
.btn-outline-light:hover {
  background: var(--clr-white);
  color: var(--clr-dark);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--clr-white);
  border-color: rgba(255,255,255,0.3);
}
.btn-ghost:hover {
  border-color: var(--clr-white);
  transform: translateY(-2px);
}

/* =====================================================
   HEADER
   ===================================================== */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-h);
  transition: background 0.4s var(--ease-in-out),
              box-shadow 0.4s var(--ease-in-out);
}
#header.scrolled {
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 40px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--clr-white);
  flex-shrink: 0;
  text-decoration: none;
}

.logo-icon {
  width: 36px;
  height: 35px;
  flex-shrink: 0;
}

.logo-icon-lg {
  width: 64px;
  height: 62px;
}

.logo-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
  line-height: 1;
}

.logo-kd {
  font-family: 'Raleway', 'Segoe UI Light', var(--font-en);
  font-size: 24px;
  font-weight: 400;
  letter-spacing: 0.22em;
  color: var(--clr-white);
}

.logo-sub {
  font-family: 'Raleway', 'Segoe UI Light', var(--font-en);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.5em;
  color: #ffffff;
  text-transform: uppercase;
}

#nav {
  margin-left: auto;
}
#nav ul {
  display: flex;
  gap: 32px;
}
#nav a {
  font-family: var(--font-ja);
  font-size: 13px;
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  transition: color 0.2s;
  position: relative;
}
#nav a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--clr-blue);
  transition: width 0.3s var(--ease-out-expo);
}
#nav a:hover       { color: var(--clr-white); }
#nav a:hover::after { width: 100%; }

.header-cta {
  margin-left: 24px;
  color: var(--clr-white);
  border-color: rgba(255,255,255,0.6);
}
.header-cta:hover {
  background: var(--clr-white);
  color: var(--clr-dark);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: none;
  border: none;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--clr-white);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out-expo), opacity 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =====================================================
   HERO
   ===================================================== */
#hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-start;
  overflow: hidden;
  background: var(--clr-black);
}

.hero-video-wrap {
  position: absolute;
  inset: 0;
}
#hero-video {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 1;
}

.hero-overlay {
  display: none;
}

@keyframes taglineFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes taglineFadeOut {
  from { opacity: 1; }
  to   { opacity: 0; }
}

/* 共通スタイル */
.hero-tagline {
  position: absolute;
  top: 18%;
  left: 48px;
  z-index: 3;
  font-family: 'Inter', var(--font-ja), sans-serif;
  font-size: 48px;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.2;
  color: #ffffff;
  white-space: nowrap;
  margin: 0;
  padding: 10px 20px;
  background: rgba(0, 0, 0, 0.55);
  display: inline-block;
  opacity: 0;
}
.hero-tagline-accent {
  color: #1a6cff;
}

/* 1つ目：映像が語る… — 4.2s FI → 10s表示 → 15s FO開始 → 16s完全消滅 */
.hero-tagline:not(.hero-tagline--price) {
  animation:
    taglineFadeIn  0.8s ease forwards 4.2s,
    taglineFadeOut 1s   ease forwards 15s;
}



.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-contact-wrap {
  display: flex;
  justify-content: center;
  padding: 32px 0;
  background: var(--clr-bg);
}
.hero-contact-btn {
  background: rgba(0,0,0,0.82);
  border-color: rgba(255,255,255,0.5);
}
.hero-contact-btn:hover {
  background: rgba(0,0,0,0.95);
  border-color: var(--clr-white);
}

/* Scroll down indicator */
.scroll-down {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.5);
}
.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.5));
  animation: scrollPulse 2s ease-in-out infinite;
}
.scroll-text {
  font-family: var(--font-en);
  font-size: 9px;
  letter-spacing: 0.3em;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50%       { opacity: 1;   transform: scaleY(1.1); }
}

/* =====================================================
   CONCEPT
   ===================================================== */
/* Concept heading – no wrap on wide screens */
.concept-heading {
  white-space: nowrap;
  margin-bottom: 48px;
}

.concept-intro {
  color: var(--clr-white);
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 48px;
}

/* 3-column point cards */
.concept-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  margin-bottom: 48px;
}
.concept-point {
  padding: 32px 28px;
  border-left: 1px solid rgba(255,255,255,0.08);
  transition: background 0.3s;
}
.concept-point:first-child {
  border-left: none;
}
.concept-point:hover {
  background: rgba(255,255,255,0.04);
}
.concept-point-num {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 300;
  letter-spacing: 0.2em;
  color: var(--clr-blue-light);
  margin-bottom: 12px;
}
.concept-point-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--clr-blue);
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}
.concept-point p {
  color: var(--clr-white);
  font-size: 14px;
  line-height: 1.85;
}

.concept-list {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row;
  gap: 12px 32px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.concept-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--clr-white);
}
.icon-check {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--clr-blue);
  flex-shrink: 0;
}
.icon-check::after {
  content: '';
  display: block;
  width: 6px; height: 10px;
  border-right: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(45deg) translate(-1px, -1px);
}

.concept-video-label {
  margin-top: 40px;
  margin-bottom: 16px;
}
.concept-video-gallery {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
}
.concept-video-arrow {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--clr-border-dark);
  background: rgba(0, 0, 0, 0.55);
  color: #ffffff;
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, transform 0.2s ease;
}
.concept-video-arrow:hover {
  background: rgba(0, 0, 0, 0.8);
  transform: scale(1.05);
}
.concept-video-scroll {
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
  padding-bottom: 12px;
}
.concept-video-track {
  display: flex;
  gap: 20px;
  width: max-content;
  margin: 0 auto;
}
.concept-video-item {
  position: relative;
  width: min(720px, 82vw);
  aspect-ratio: 16/9;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--clr-border-dark);
  flex-shrink: 0;
  scroll-snap-align: center;
}
.concept-video-item iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.concept-video-scroll::-webkit-scrollbar {
  height: 6px;
}
.concept-video-scroll::-webkit-scrollbar-thumb {
  background: var(--clr-border-dark);
  border-radius: 3px;
}

/* Concept visual */
.concept-img-wrap {
  position: relative;
}
.concept-img-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--clr-dark-3) 0%, var(--clr-dark-2) 100%);
  border: 1px solid var(--clr-border-dark);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.08);
  text-align: center;
  line-height: 1.4;
  overflow: hidden;
  position: relative;
}
.concept-img-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 30%, rgba(26,108,255,0.12) 0%, transparent 60%);
}

.concept-badge {
  position: absolute;
  bottom: -20px; right: -20px;
  background: var(--clr-blue);
  border-radius: 12px;
  padding: 20px 24px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(26,108,255,0.4);
}
.badge-number {
  font-family: var(--font-en);
  font-size: 2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--clr-white);
}
.badge-number span { font-size: 1.2rem; }
.badge-label {
  font-size: 11px;
  color: rgba(255,255,255,0.8);
  letter-spacing: 0.1em;
  margin-top: 4px;
}

/* =====================================================
   AIRCRAFT
   ===================================================== */
.aircraft-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 1300px;
  margin: 0 auto;
}

.aircraft-card {
  background: var(--clr-white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  transition: transform 0.3s var(--ease-out-expo), box-shadow 0.3s;
  position: relative;
  border: 2px solid transparent;
}
.aircraft-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.15);
}
.aircraft-card.featured {
  border-color: var(--clr-blue);
  box-shadow: 0 8px 40px rgba(26,108,255,0.2);
}
.aircraft-card.featured:hover {
  box-shadow: 0 20px 60px rgba(26,108,255,0.3);
}

.aircraft-badge-tag {
  position: absolute;
  top: 16px; right: 16px;
  background: var(--clr-blue);
  color: var(--clr-white);
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 99px;
  z-index: 1;
}

.aircraft-img-wrap {
  background: var(--clr-dark);
  padding: 0;
  overflow: hidden;
}
.aircraft-photo {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  display: block;
  transition: transform 0.5s var(--ease-out-expo);
}
.aircraft-card:hover .aircraft-photo {
  transform: scale(1.04);
}

/* Slideshow */
.aircraft-slideshow {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.aircraft-slideshow .aircraft-photo {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  aspect-ratio: unset;
}

@keyframes slide-fade-a {
  0%, 42%  { opacity: 1; }
  50%, 92% { opacity: 0; }
  100%     { opacity: 1; }
}
@keyframes slide-fade-b {
  0%, 42%  { opacity: 0; }
  50%, 92% { opacity: 1; }
  100%     { opacity: 0; }
}

.slide-img-a { animation: slide-fade-a 8s ease-in-out infinite; }
.slide-img-b { animation: slide-fade-b 8s ease-in-out infinite; }
.aircraft-img-placeholder {
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
}
.aircraft-img-placeholder svg {
  width: 80px; height: 60px;
}
.aircraft-img-placeholder.blue  { color: var(--clr-blue-light); }
.aircraft-img-placeholder.white { color: rgba(255,255,255,0.6); }

.aircraft-info {
  padding: 24px;
}
.aircraft-tag {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--clr-blue);
  background: rgba(26,108,255,0.1);
  padding: 4px 10px;
  border-radius: 99px;
  margin-bottom: 10px;
}
.aircraft-info h3 {
  font-family: var(--font-en);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-black);
  margin-bottom: 8px;
}
.aircraft-info p {
  font-size: 15px;
  color: var(--clr-black);
  line-height: 1.7;
  margin-bottom: 16px;
}
.aircraft-specs {
  border-top: 1px solid var(--clr-border-light);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.aircraft-specs li {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--clr-black);
}
.aircraft-specs li span {
  color: var(--clr-black);
  font-size: 12px;
}

/* =====================================================
   PORTFOLIO
   ===================================================== */
.portfolio-filter {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.filter-btn {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  padding: 8px 20px;
  border-radius: 99px;
  border: 1px solid rgba(255,255,255,0.2);
  background: transparent;
  color: rgba(255,255,255,0.6);
  transition: all 0.25s;
}
.filter-btn:hover, .filter-btn.active {
  background: var(--clr-blue);
  border-color: var(--clr-blue);
  color: var(--clr-white);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto;
  gap: 16px;
}
.portfolio-item.large {
  grid-column: span 1;
  grid-row: span 2;
}

.portfolio-thumb {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  aspect-ratio: 16/10;
  cursor: pointer;
}
.portfolio-item.large .portfolio-thumb {
  aspect-ratio: unset;
  height: 100%;
  min-height: 300px;
}

.portfolio-placeholder {
  width: 100%; height: 100%;
  background: linear-gradient(135deg, var(--clr-dark-3) 0%, #1e2230 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 160px;
}
.portfolio-placeholder.accent {
  background: linear-gradient(135deg, #0f1a35 0%, #1a2d60 100%);
}

.portfolio-play {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: rgba(26,108,255,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--clr-white);
  transition: transform 0.3s, background 0.3s;
  backdrop-filter: blur(4px);
}
.portfolio-thumb:hover .portfolio-play {
  transform: scale(1.15);
  background: var(--clr-blue);
}

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, transparent 60%);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  opacity: 0;
  transition: opacity 0.3s;
}
.portfolio-thumb:hover .portfolio-overlay { opacity: 1; }

.portfolio-category {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--clr-blue-light);
  margin-bottom: 6px;
}
.portfolio-overlay h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--clr-white);
  margin-bottom: 4px;
}
.portfolio-overlay p {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
}

/* =====================================================
   PRICING
   ===================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 1160px;
  margin: 0 auto;
  align-items: stretch;
}
.pricing-single {
  grid-template-columns: 1fr;
  max-width: 520px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--clr-white);
  border-radius: 16px;
  padding: 40px 280px 40px 32px;
  position: relative;
  z-index: 1;
  border: 2px solid transparent;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  transition: transform 0.3s var(--ease-out-expo), box-shadow 0.3s var(--ease-out-expo);
}
.pricing-card.featured {
  border-color: var(--clr-blue);
  background: var(--clr-white);
  color: var(--clr-black);
  box-shadow: 0 8px 48px rgba(26,108,255,0.35);
}
.pricing-grid .pricing-card:hover { transform: translateY(-6px); box-shadow: 0 16px 48px rgba(0,0,0,0.15); z-index: 2; }
.pricing-grid .pricing-card.featured:hover { transform: translateY(-6px); box-shadow: 0 16px 48px rgba(26,108,255,0.4); z-index: 2; }

.pricing-ribbon {
  position: absolute;
  top: -1px; right: 24px;
  background: var(--clr-blue);
  color: var(--clr-white);
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 0 0 8px 8px;
  letter-spacing: 0.05em;
}

.pricing-tier {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--clr-blue);
  margin-bottom: 12px;
}
.pricing-price {
  font-family: var(--font-en);
  font-size: 1rem;
  color: var(--clr-gray);
  margin-bottom: 32px;
  line-height: 1;
  white-space: nowrap;
}
.pricing-card.featured .pricing-price { color: var(--clr-black); }
.pricing-price span {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--clr-black);
  margin: 0 2px;
}
.pricing-card.featured .pricing-price span { color: var(--clr-black); }
.pricing-price small { font-size: 0.85rem; color: var(--clr-black); }

.pricing-features {
  border-top: 1px solid var(--clr-border-light);
  padding-top: 24px;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.pricing-card.featured .pricing-features { border-color: var(--clr-border-light); }
.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--clr-black);
}
.pricing-card.featured .pricing-features li { color: var(--clr-black); }
.pricing-features li::before {
  content: '';
  display: block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--clr-blue);
  flex-shrink: 0;
}
.pricing-features li.disabled { color: var(--clr-gray-2); }
.pricing-features li.disabled::before { background: var(--clr-gray-2); }

.pricing-note {
  margin-top: 40px;
  text-align: center;
  font-size: 12px;
  color: var(--clr-gray-2);
  line-height: 1.8;
}

/* =====================================================
   FLOW
   ===================================================== */
.flow-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  margin-top: 8px;
}

.flow-step {
  padding: 0 16px 0 0;
}
.flow-step:last-child {
  padding-right: 0;
}

.flow-step-header {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}

.flow-step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--clr-blue);
  color: var(--clr-white);
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.flow-step-connector {
  flex: 1;
  height: 2px;
  background: linear-gradient(to right, var(--clr-blue), rgba(26,108,255,0.25));
  margin-left: 8px;
}

.flow-step-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--clr-black);
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.flow-step-desc {
  font-size: 13px;
  color: var(--clr-black);
  line-height: 1.75;
}

@media (max-width: 1024px) {
  .flow-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 40px 0;
  }
  .flow-step:nth-child(3) .flow-step-connector,
  .flow-step:nth-child(5) .flow-step-connector { display: none; }
  .flow-step { padding-right: 16px; }
}

@media (max-width: 768px) {
  .flow-steps {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .flow-step {
    display: flex;
    gap: 20px;
    padding: 0 0 32px 0;
  }
  .flow-step-header {
    flex-direction: column;
    align-items: center;
    margin-bottom: 0;
    flex-shrink: 0;
  }
  .flow-step-connector {
    width: 2px;
    height: 100%;
    min-height: 40px;
    flex: 1;
    margin-left: 0;
    margin-top: 8px;
    background: linear-gradient(to bottom, var(--clr-blue), rgba(26,108,255,0.25));
  }
  .flow-step:last-child { padding-bottom: 0; }
  .flow-step:last-child .flow-step-connector { display: none; }
  .flow-step-body { padding-top: 12px; }
  .flow-step-title { font-size: 14px; }
}

.flow-payment {
  max-width: 640px;
  margin: 56px auto 0;
  padding: 32px 40px;
  border: 1px solid var(--clr-border-light);
  border-left: 3px solid var(--clr-blue);
}
.flow-payment-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--clr-blue);
  margin-bottom: 16px;
}
.flow-payment p {
  font-size: 13px;
  line-height: 1.9;
  color: var(--clr-black);
  margin-bottom: 4px;
}
.flow-payment-note {
  margin-top: 12px !important;
  color: var(--clr-gray) !important;
  font-size: 12px !important;
}

/* =====================================================
   CONTACT
   ===================================================== */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 64px;
  align-items: start;
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form-group label {
  font-size: 13px;
  font-weight: 500;
  color: var(--clr-white);
}
.required {
  color: #f87171;
  margin-left: 4px;
}
.form-group input,
.form-group select,
.form-group textarea {
  background: var(--clr-dark-3);
  border: 1px solid var(--clr-border-dark);
  border-radius: 8px;
  padding: 12px 16px;
  font-family: var(--font-ja);
  font-size: 14px;
  color: var(--clr-white);
  transition: border-color 0.25s, box-shadow 0.25s;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23ffffff' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}
.form-group select option { background: var(--clr-dark-2); }
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,0.25); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--clr-blue);
  box-shadow: 0 0 0 3px var(--clr-blue-glow);
}

.form-check { flex-direction: row; align-items: center; gap: 12px; }
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 13px;
  color: var(--clr-white);
}
.checkbox-label input[type="checkbox"] { display: none; }
.checkmark {
  width: 18px; height: 18px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 4px;
  flex-shrink: 0;
  transition: background 0.2s, border-color 0.2s;
}
.checkbox-label input:checked ~ .checkmark {
  background: var(--clr-blue);
  border-color: var(--clr-blue);
}
.link { color: var(--clr-blue-light); }

/* Contact info sidebar */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 40px;
  padding-top: 8px;
}
.contact-info-block h4 {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--clr-white);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.contact-tel {
  font-family: var(--font-en);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--clr-white);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 4px;
}
.contact-tel:hover { color: var(--clr-blue-light); }
.contact-hours { font-size: 12px; color: var(--clr-white); }
.contact-email {
  font-family: var(--font-en);
  font-size: 1rem;
  color: var(--clr-blue-light);
  display: block;
}
.contact-email:hover { text-decoration: underline; }

.social-links {
  display: flex;
  gap: 16px;
}
.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border: 1px solid var(--clr-border-dark);
  border-radius: 8px;
  color: var(--clr-gray-2);
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}
.social-link:hover {
  border-color: var(--clr-blue);
  color: var(--clr-white);
  background: var(--clr-blue);
}

/* =====================================================
   COMPANY
   ===================================================== */
.company-wrap {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 64px;
  align-items: start;
}

.company-logo-area {
  display: flex;
  flex-direction: column;
  gap: 40px;
}
.company-logo-block {
  padding: 40px;
  background: var(--clr-dark);
  border-radius: 16px;
}
.big-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}
.company-logo-block p {
  font-size: 13px;
  color: var(--clr-white);
}

.company-numbers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.number-item {
  text-align: center;
  padding: 20px 8px;
  background: var(--clr-dark);
  border-radius: 12px;
  border: 1px solid var(--clr-border-dark);
}
.number-val {
  font-family: var(--font-en);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--clr-blue);
}
.number-label {
  font-size: 11px;
  color: var(--clr-gray-2);
  margin-top: 4px;
}

.company-table {
  width: 100%;
  border-collapse: collapse;
}
.company-table th,
.company-table td {
  padding: 18px 20px;
  font-size: 14px;
  border-bottom: 1px solid var(--clr-border-light);
  vertical-align: top;
  line-height: 1.7;
}
.company-table th {
  width: 140px;
  font-weight: 500;
  color: var(--clr-black);
  white-space: nowrap;
}
.company-table td { color: var(--clr-black); }
.company-table tr:first-child th,
.company-table tr:first-child td { border-top: 1px solid var(--clr-border-light); }

/* =====================================================
   FOOTER
   ===================================================== */
#footer {
  background: var(--clr-black);
  border-top: 1px solid var(--clr-border-dark);
  padding: 64px 0 32px;
}

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

.footer-brand .logo { margin-bottom: 8px; }
.footer-brand p {
  font-size: 13px;
  color: var(--clr-white);
}

.footer-nav {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.footer-nav a {
  font-size: 13px;
  color: var(--clr-white);
  transition: color 0.2s;
}
.footer-nav a:hover { color: var(--clr-blue-light); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 32px;
  border-top: 1px solid var(--clr-border-dark);
}
.copyright {
  font-family: var(--font-en);
  font-size: 12px;
  color: var(--clr-white);
}
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  font-size: 12px;
  color: var(--clr-white);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--clr-blue-light); }

/* =====================================================
   RESPONSIVE – Tablet (≤ 1024px)
   ===================================================== */
@media (max-width: 1024px) {
  /* Concept */
  .concept-heading  { white-space: normal; }
  .concept-points   { grid-template-columns: 1fr; gap: 0; }
  .concept-point    { border-left: none; border-top: 1px solid rgba(255,255,255,0.08); }
  .concept-point:first-child { border-top: none; }
  .concept-list     { flex-direction: column; }

  /* Aircraft */
  .aircraft-grid    { grid-template-columns: repeat(2, 1fr); max-width: 100%; }

  /* Portfolio */
  .portfolio-grid   { grid-template-columns: repeat(2, 1fr); }
  .portfolio-item.large { grid-column: span 2; grid-row: span 1; }

  /* Pricing */
  .pricing-grid     { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .pricing-card.featured { transform: none; order: -1; }
  .pricing-card { padding: 32px 32px 28px; }
  .card-aircraft-stack {
    position: static !important;
    flex-direction: row !important;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--clr-border-light);
  }
  .card-aircraft-stack img { width: 130px; height: 82px; }
  .card-aircraft-single img { width: 160px; height: 100px; }

  /* Contact */
  .contact-wrap     { grid-template-columns: 1fr; }
  .contact-info     { flex-direction: row; flex-wrap: wrap; gap: 32px; }

  /* Company */
  .company-wrap     { grid-template-columns: 1fr; }
}

/* =====================================================
   RESPONSIVE – Mobile (≤ 768px)
   ===================================================== */
@media (max-width: 768px) {
  :root { --header-h: 60px; }

  .section-dark, .section-light { padding: 64px 0; }

  /* Header */
  #nav, .header-cta { display: none; }
  .hamburger { display: flex; }

  /* Mobile nav overlay */
  #nav.open {
    display: flex;
    position: fixed;
    inset: 0;
    background: rgba(10,10,10,0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 999;
  }
  #nav.open ul {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }
  #nav.open ul a {
    font-size: 1.5rem;
    font-weight: 700;
  }

  /* Hero – 動画をスマホ画面に収める */
  #hero {
    width: 100%;
    max-width: 100vw;
    height: 100svh;
    min-height: unset;
    overflow: hidden;
    position: relative;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
  }
  .hero-video-wrap {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
  }
  #hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    -webkit-transform: translate(-50%, -50%);
    width: 100%;
    height: auto;
    max-width: 100%;
    object-fit: contain;
  }


  .sp-br { display: block; }
  .pc-br { display: none; }

  /* Concept */
  .concept-point { padding: 24px 16px; }

  /* Aircraft */
  .aircraft-grid { grid-template-columns: 1fr; }

  /* FAQ */
  .faq-list { grid-template-columns: 1fr; }
  .faq-col + .faq-col .faq-item:first-child { border-top: none; }

  /* Portfolio */
  .portfolio-grid { grid-template-columns: 1fr; }
  .portfolio-item.large { grid-column: span 1; }
  .portfolio-item.large .portfolio-thumb { height: auto; min-height: auto; }

  /* Pricing */
  .pricing-grid  { max-width: 100%; }

  /* Contact */
  .form-row { grid-template-columns: 1fr; }
  .contact-info { flex-direction: column; gap: 32px; }

  /* Footer */
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 12px; }
  .footer-nav    { gap: 16px; }
  .footer-links  { flex-direction: column; gap: 10px; }
}

/* =====================================================
   RESPONSIVE – Small Mobile (≤ 480px)
   ===================================================== */
@media (max-width: 480px) {
  .container { padding: 0 16px; }

  .section-dark, .section-light { padding: 48px 0; }
  .section-title { font-size: 1.6rem; }
  .section-desc  { font-size: 0.9rem; }

  /* Hero */
  .hero-tagline { font-size: 22px; top: 18%; left: 20px; white-space: normal; padding: 8px 14px; }

  /* Concept */
  .concept-point { padding: 20px 12px; }
  .concept-point-title { font-size: 16px; }
  .concept-list  { gap: 10px; }

  /* Aircraft */
  .aircraft-info { padding: 16px; }

  /* Pricing */
  .pricing-card { padding: 24px 16px; }
  .card-aircraft-stack {
    position: static !important;
    flex-direction: row !important;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--clr-border-light);
  }
  .card-aircraft-stack img { width: 120px; height: 75px; }
  .card-aircraft-single img { width: 140px; height: 88px; }

  /* Contact */
  .contact-form { padding: 0; }

  /* Company */
  .company-table th,
  .company-table td { padding: 14px 12px; font-size: 13px; }
  .company-table th { width: 90px; }
}

/* =====================================================
   FAQ
   ===================================================== */
.faq-list {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: 64px;
  align-items: start;
}
.faq-col {
  display: flex;
  flex-direction: column;
}
.faq-item {
  border-bottom: 1px solid var(--clr-border-dark);
}
.faq-col .faq-item:first-child {
  border-top: 1px solid var(--clr-border-dark);
}
.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  text-align: left;
  color: var(--clr-white);
  font-family: var(--font-ja);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  transition: color 0.2s;
}
.faq-question:hover { color: var(--clr-blue-light); }
.faq-question.open  { color: var(--clr-blue-light); }
.faq-icon {
  flex-shrink: 0;
  width: 26px; height: 26px;
  border: 1px solid var(--clr-border-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 300;
  transition: background 0.25s, border-color 0.25s, transform 0.35s var(--ease-out-expo);
}
.faq-question.open .faq-icon {
  background: var(--clr-blue);
  border-color: var(--clr-blue);
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s var(--ease-out-expo);
}
.faq-answer-inner {
  padding: 0 0 24px;
  color: var(--clr-white);
  font-size: 14px;
  line-height: 1.9;
}
.card-aircraft-stack {
  position: absolute;
  bottom: 20px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}
.card-aircraft-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.card-aircraft-stack img {
  width: 160px;
  height: 100px;
  object-fit: contain;
}
.card-aircraft-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--clr-gray);
  letter-spacing: 0.03em;
}
.card-aircraft-single img {
  width: 240px;
  height: 150px;
}

.pricing-construction-link {
  text-align: center;
  margin-top: 28px;
}
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--clr-blue-light);
  font-size: 14px;
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, opacity 0.2s ease;
}
.link-arrow:hover {
  border-color: var(--clr-blue-light);
}
.link-arrow-icon {
  transition: transform 0.2s ease;
}
.link-arrow:hover .link-arrow-icon {
  transform: translateX(4px);
}

.pricing-detail {
  margin-top: 40px;
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.pricing-detail p {
  color: var(--clr-white);
  font-size: 15px;
  line-height: 1.9;
  padding-left: 1em;
  text-indent: -1em;
}

.faq-footer-note {
  text-align: center;
  margin-top: 48px;
  color: var(--clr-white);
  font-size: 14px;
}

/* =====================================================
   CONTACT on section-light – color overrides
   ===================================================== */
#contact .form-group label { color: var(--clr-black); }
#contact .checkbox-label { color: var(--clr-black); }
#contact .checkmark { border-color: rgba(0,0,0,0.3); }
#contact .contact-info-block h4 { color: var(--clr-black); }
#contact .contact-email { color: var(--clr-blue); }
#contact .social-link {
  border-color: var(--clr-border-light);
  color: var(--clr-gray);
}
#contact .social-link:hover {
  border-color: var(--clr-blue);
  color: var(--clr-blue);
  background: transparent;
}

/* =====================================================
   COMPANY on section-dark – color overrides
   ===================================================== */
#company .company-table th,
#company .company-table td {
  color: var(--clr-white);
  border-bottom-color: var(--clr-border-dark);
}
#company .company-table tr:first-child th,
#company .company-table tr:first-child td {
  border-top-color: var(--clr-border-dark);
}
#company .company-table th { color: var(--clr-gray-2); }