/* ===================================
   Flying Display LP - Main Stylesheet
   ドローンショー・ジャパン トンマナ準拠
   =================================== */

/* ===== CSS Custom Properties ===== */
:root {
  --color-bg: #08101e;
  --color-bg-alt: #0d1a2b;
  --color-bg-card: #111d2e;
  --color-accent: #6fd3ff;
  --color-accent-dim: #3fa8d6;
  --color-text: #ffffff;
  --color-text-body: #c9d3e0;
  --color-text-muted: #7f8a99;
  --color-border: rgba(111, 211, 255, 0.15);
  --color-overlay: rgba(8, 16, 30, 0.65);

  --font-ja: "Noto Sans JP", sans-serif;
  --font-en: "Inter", sans-serif;

  --container-max: 1120px;
  --container-pad: clamp(20px, 4vw, 48px);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --transition: 0.3s ease;
  --shadow-glow: 0 0 20px rgba(111, 211, 255, 0.2);
}

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

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

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-ja);
  font-weight: 400;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul,
ol {
  list-style: none;
}

address {
  font-style: normal;
}

/* ===== Container ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

/* ===== Typography ===== */
.section-label {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.section-lead {
  font-size: clamp(0.9rem, 1.5vw, 1rem);
  color: var(--color-text-body);
  line-height: 1.9;
  max-width: 680px;
}

.section-body {
  font-size: 0.95rem;
  color: var(--color-text-body);
  line-height: 1.9;
}

.section-header {
  text-align: center;
  margin-bottom: clamp(40px, 6vw, 72px);
}

.section-header .section-lead {
  margin: 0 auto;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-family: var(--font-ja);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  border: none;
}

.btn-primary {
  background-color: #fff;
  color: var(--color-bg);
}

.btn-primary:hover {
  background-color: var(--color-accent);
  color: var(--color-bg);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background-color: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.5);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-large {
  padding: 18px 44px;
  font-size: 1rem;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0;
  transition:
    background var(--transition),
    box-shadow var(--transition);
}

.site-header.scrolled {
  background: rgba(8, 16, 30, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(111, 211, 255, 0.1);
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 18px var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.header-logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}

.logo-img {
  width: 100px;
  height: auto;
  object-fit: cover;
  object-position: center;
}

.logo-text {
  font-family: var(--font-en);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: #fff;
}

.logo-sub {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.header-nav ul {
  display: flex;
  align-items: center;
  gap: 32px;
}

.header-nav a {
  font-size: 0.85rem;
  color: var(--color-text-body);
  letter-spacing: 0.03em;
  transition: color var(--transition);
}

.header-nav a:hover {
  color: #fff;
}

.header-nav .nav-cta {
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.header-nav .nav-cta:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: #fff;
  transition: all var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ===== Section: Hero ===== */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(8, 16, 30, 0.85) 0%,
    rgba(8, 16, 30, 0.6) 50%,
    rgba(8, 16, 30, 0.4) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: 120px;
  padding-bottom: 80px;
  margin-left: 60px;
  width: 100%;
}

.hero-text {
  max-width: 640px;
}

.hero-eyebrow {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.hero-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.footnote-mark {
  font-size: 0.5em;
  vertical-align: super;
  color: var(--color-accent);
  font-weight: 400;
}

.service-name {
  font-family: var(--font-en);
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  margin-bottom: 20px;
  line-height: 1;
}

.hero-sub {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  font-weight: 500;
  color: #fff;
  line-height: 1.7;
  margin-bottom: 20px;
}

.hero-body {
  font-size: 0.9rem;
  color: var(--color-text-body);
  line-height: 1.9;
  margin-bottom: 36px;
  max-width: 540px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.footnote {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 500px;
  border-left: 2px solid var(--color-border);
  padding-left: 12px;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  right: var(--container-pad);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.hero-scroll span {
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  writing-mode: horizontal-tb;
}

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

@keyframes scrollPulse {
  0%,
  100% {
    opacity: 0.4;
    transform: scaleY(1);
  }
  50% {
    opacity: 1;
    transform: scaleY(1.1);
  }
}

/* ===== Section: About ===== */
.about {
  padding: clamp(80px, 10vw, 128px) 0;
  background: var(--color-bg-alt);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.about-image::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  box-shadow: inset 0 0 0 1px var(--color-border);
  pointer-events: none;
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
}

.about-text .section-label {
  margin-bottom: 8px;
}

.about-text .section-title {
  margin-bottom: 24px;
}

.about-text .section-body {
  margin-bottom: 36px;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.feature-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: rgba(111, 211, 255, 0.08);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-content h3 {
  font-size: 0.9rem;
  font-weight: 500;
  color: #fff;
  margin-bottom: 4px;
  letter-spacing: 0.02em;
}

.feature-content p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== Section: Why ===== */
.why {
  position: relative;
  padding: clamp(80px, 10vw, 128px) 0;
  overflow: hidden;
}

.why-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.why-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.why-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 16, 30, 0.82);
}

.why .container {
  position: relative;
  z-index: 1;
}

.why .section-title,
.why .section-lead {
  color: #fff;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.value-card {
  background: rgba(13, 26, 43, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: clamp(24px, 3vw, 36px);
  backdrop-filter: blur(8px);
  transition:
    border-color var(--transition),
    transform var(--transition);
}

.value-card:hover {
  border-color: rgba(111, 211, 255, 0.35);
  transform: translateY(-4px);
}

.value-number {
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.value-title {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  font-weight: 700;
  line-height: 1.4;
  color: #fff;
  margin-bottom: 8px;
}

.value-subtitle {
  font-size: 0.8rem;
  color: var(--color-accent);
  line-height: 1.5;
  margin-bottom: 16px;
  font-weight: 500;
}

.value-body {
  font-size: 0.87rem;
  color: var(--color-text-body);
  line-height: 1.85;
}

/* ===== Section: Kanazawa ===== */
.kanazawa {
  padding: clamp(80px, 10vw, 128px) 0;
  background: var(--color-bg);
}

.kanazawa-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}

.spec-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 28px;
}

.spec-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.spec-item:first-child {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.spec-item dt {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 400;
  letter-spacing: 0.02em;
  padding-top: 2px;
}

.spec-item dd {
  font-size: 0.92rem;
  color: #fff;
  font-weight: 500;
  line-height: 1.6;
}

.kanazawa-note {
  font-size: 0.85rem;
  color: var(--color-text-body);
  line-height: 1.8;
  margin-bottom: 28px;
}

.media-label {
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.media-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.media-list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.83rem;
  color: var(--color-accent);
  transition: opacity var(--transition);
}

.media-list a:hover {
  opacity: 0.75;
}

.media-list a svg {
  flex-shrink: 0;
}

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

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

.video-caption {
  margin-top: 10px;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ===== Section: Usecase ===== */
.usecase {
  position: relative;
  padding: clamp(80px, 10vw, 128px) 0;
  overflow: hidden;
}

.usecase-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.usecase-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.usecase-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 16, 30, 0.85);
}

.usecase .container {
  position: relative;
  z-index: 1;
}

.usecase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.usecase-card {
  background: rgba(17, 29, 46, 0.9);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: clamp(24px, 3vw, 36px);
  backdrop-filter: blur(6px);
  transition:
    border-color var(--transition),
    transform var(--transition);
}

.usecase-card:hover {
  border-color: rgba(111, 211, 255, 0.3);
  transform: translateY(-3px);
}

.usecase-icon {
  width: 52px;
  height: 52px;
  background: rgba(111, 211, 255, 0.07);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.usecase-title {
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  font-weight: 700;
  line-height: 1.4;
  color: #fff;
  margin-bottom: 12px;
}

.usecase-body {
  font-size: 0.87rem;
  color: var(--color-text-body);
  line-height: 1.85;
  margin-bottom: 18px;
}

.usecase-examples {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.usecase-examples li {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding-left: 14px;
  position: relative;
}

.usecase-examples li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 1px;
  background: var(--color-accent);
}

/* ===== Mid CTA ===== */
.mid-cta {
  padding: clamp(48px, 7vw, 80px) 0;
  background: var(--color-bg-alt);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mid-cta .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.mid-cta-text {
  font-size: clamp(1rem, 2vw, 1.15rem);
  font-weight: 500;
  color: #fff;
  line-height: 1.5;
}

.mid-cta-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* ===== Section: Flow ===== */
.flow {
  padding: clamp(80px, 10vw, 128px) 0;
  background: var(--color-bg);
}

.flow-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
}

.flow-item {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: clamp(20px, 3vw, 32px);
}

.flow-item--last .flow-arrow {
  display: none;
}

.flow-num {
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.flow-content h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.4;
}

.flow-content p {
  font-size: 0.83rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.flow-arrow {
  position: absolute;
  top: 50%;
  right: -20px;
  transform: translateY(-50%);
  z-index: 2;
  color: var(--color-accent);
}

/* ===== Section: Safety ===== */
.safety {
  padding: clamp(80px, 10vw, 128px) 0;
  background: var(--color-bg-alt);
}

.safety-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.safety-item {
  background: var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: clamp(24px, 3vw, 32px);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.safety-icon {
  width: 48px;
  height: 48px;
  background: rgba(111, 211, 255, 0.07);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.safety-item h3 {
  font-size: 0.93rem;
  font-weight: 600;
  color: #fff;
  line-height: 1.4;
}

.safety-item p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* ===== Section: FAQ ===== */
.faq {
  padding: clamp(80px, 10vw, 128px) 0;
  background: var(--color-bg);
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.faq-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  cursor: pointer;
  font-size: 0.93rem;
  font-weight: 500;
  color: #fff;
  line-height: 1.5;
  user-select: none;
  transition: color var(--transition);
}

.faq-q:hover {
  color: var(--color-accent);
}

.faq-q span {
  flex: 1;
}

.faq-icon {
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition:
    transform var(--transition),
    color var(--transition);
}

.faq-q[aria-expanded="true"] .faq-icon {
  transform: rotate(180deg);
  color: var(--color-accent);
}

.faq-a {
  font-size: 0.87rem;
  color: var(--color-text-body);
  line-height: 1.9;
  padding-bottom: 22px;
  display: none;
}

.faq-a.open {
  display: block;
}

/* ===== Section: Contact (Final CTA) ===== */
.contact {
  position: relative;
  padding: clamp(80px, 12vw, 140px) 0;
  overflow: hidden;
}

.contact-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.contact-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.contact-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 16, 30, 0.88);
}

.contact .container {
  position: relative;
  z-index: 1;
}

.contact-inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.contact-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 24px;
}

.contact-body {
  font-size: 0.9rem;
  color: var(--color-text-body);
  line-height: 1.9;
  margin-bottom: 40px;
}

.contact-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: clamp(48px, 6vw, 72px) 0 32px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-service {
  font-family: var(--font-en);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.footer-company {
  font-size: 0.85rem;
  color: #fff;
  font-weight: 500;
}

.footer-address {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-link {
  font-size: 0.8rem;
  color: var(--color-accent);
  transition: opacity var(--transition);
}

.footer-link:hover {
  opacity: 0.75;
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a {
  font-size: 0.83rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
}

.footer-copyright {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-family: var(--font-en);
  letter-spacing: 0.02em;
}

/* ===== Fade-in Animation ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

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

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

/* ===== Utility ===== */
.br-pc {
  display: block;
}

.br-sp {
  display: none;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .value-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin: 0 auto;
  }

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

  .flow-arrow {
    display: none;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .header-nav {
    position: fixed;
    top: 0;
    right: -100%;
    bottom: 0;
    width: min(300px, 80vw);
    background: rgba(8, 16, 30, 0.98);
    backdrop-filter: blur(16px);
    padding: 80px 32px 40px;
    transition: right var(--transition);
    z-index: 99;
    border-left: 1px solid var(--color-border);
  }

  .header-nav.open {
    right: 0;
  }

  .header-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .header-nav a {
    font-size: 1rem;
  }

  .header-nav .nav-cta {
    margin-top: 8px;
  }

  .br-pc {
    display: none;
  }

  .br-sp {
    display: block;
  }

  .about-inner {
    grid-template-columns: 1fr;
  }

  .about-image {
    order: -1;
  }

  .kanazawa-inner {
    grid-template-columns: 1fr;
  }

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

  .value-grid {
    max-width: 100%;
  }

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

  .flow-list {
    grid-template-columns: 1fr;
  }

  .mid-cta .container {
    flex-direction: column;
    align-items: center;
  }

  .hero-content {
    margin-left: auto;
    margin-right: auto;
  }

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

  .hero-cta .btn {
    width: 100%;
    max-width: 300px;
  }

  .contact-cta {
    flex-direction: column;
    align-items: center;
  }

  .contact-cta .btn {
    width: 100%;
    max-width: 320px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 32px;
  }

  .footer-nav ul {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 12px 24px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.55rem;
  }

  .service-name {
    font-size: 2.2rem;
  }

  .spec-item {
    grid-template-columns: 120px 1fr;
  }
}