:root {
  --color-bg-dark: #f8fafc;
  --color-bg-mid: #f1f5f9;
  --color-bg-card: #ffffff;
  --color-bg-elevated: #e2e8f0;
  --color-primary: #2563eb;
  --color-primary-light: #3b82f6;
  --color-primary-dark: #1d4ed8;
  --color-accent: #0891b2;
  --color-accent-muted: #06b6d4;
  --color-text: #0f172a;
  --color-text-muted: #475569;
  --color-text-dim: #64748b;
  --color-border: rgba(15, 23, 42, 0.08);
  --color-border-hover: rgba(15, 23, 42, 0.15);
  --color-glow: rgba(37, 99, 235, 0.08);
  --color-glow-accent: rgba(8, 145, 178, 0.1);
  --color-icon: #334155;
  --color-icon-accent: #2563eb;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-mid: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --nav-height: 68px;
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 4px 24px rgba(0, 0, 0, 0.1);
  --content-max: 1360px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg-dark);
  background-image: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(37, 99, 235, 0.06) 0%, transparent 50%);
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--color-accent);
}

.stage-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-mid);
}

.stage-nav.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
}

.nav-inner {
  max-width: var(--content-max);
  width: 100%;
  margin: 0 auto;
  padding: 0 32px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo-wrap {
  display: flex;
  align-items: center;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-logo-wrap:hover {
  opacity: 0.95;
  transform: scale(1.02);
}

.nav-logo-img {
  height: 48px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
  object-position: left center;
  filter: invert(1);
}

.nav-menu {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.nav-link {
  position: relative;
  padding: 10px 16px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 6px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: transform var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text);
  background: rgba(0, 0, 0, 0.04);
}

.nav-link:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.nav-link.active {
  color: var(--color-primary);
  background: rgba(37, 99, 235, 0.08);
}

.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 12px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.nav-toggle:hover {
  background: rgba(0, 0, 0, 0.04);
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.stage-curtain {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.curtain-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: transform 8s ease-out;
}

.stage-curtain:hover .curtain-bg {
  transform: scale(1.03);
}

.curtain-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.7) 0%, rgba(248, 250, 252, 0.9) 50%, var(--color-bg-dark) 100%);
  z-index: 1;
}

.curtain-glow {
  position: absolute;
  top: 38%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 900px;
  height: 450px;
  background: radial-gradient(ellipse 100% 100%, var(--color-glow) 0%, transparent 60%);
  pointer-events: none;
  z-index: 1;
}

.curtain-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: calc(var(--nav-height) + 56px) 32px 120px;
  max-width: 800px;
}

.curtain-label {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 24px;
  padding: 6px 16px;
  border: 1px solid rgba(8, 145, 178, 0.4);
  border-radius: 100px;
  background: rgba(8, 145, 178, 0.1);
}

.curtain-title {
  font-size: clamp(2.9rem, 7.5vw, 4.5rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.08;
  margin: 0 0 24px;
  letter-spacing: -0.02em;
}

.curtain-sub {
  display: block;
  font-size: 0.42em;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-top: 8px;
  letter-spacing: 0.1em;
}

.curtain-desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin: 0 0 44px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.curtain-actions {
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 34px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  border: none;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(59, 130, 246, 0.4);
}

.btn-primary:active {
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.8);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  color: var(--color-text);
  border-color: var(--color-border-hover);
  background: rgba(255, 255, 255, 1);
  transform: translateY(-2px);
}

.curtain-line {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  z-index: 2;
}

.tech-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.stage-section {
  position: relative;
  padding: 80px 32px;
  border-bottom: 1px solid var(--color-border);
}

.section-inner {
  max-width: var(--content-max);
  width: 100%;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-icon {
  display: inline-flex;
  margin-bottom: 20px;
  padding: 12px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(8, 145, 178, 0.08) 100%);
  border-radius: var(--radius-md);
  border: 1px solid rgba(37, 99, 235, 0.2);
  color: var(--color-icon-accent);
}

.section-icon img {
  filter: none;
}

.section-icon img {
  width: 32px;
  height: 32px;
  opacity: 1;
  color: var(--color-icon-accent);
}

.section-icon img,
.debut-card-icon img,
.cap-icon img,
.cap-tag img,
.security-block-icon img,
.scene-card-icon img,
.terms-item-icon img,
.contact-item-icon img,
.guide-step-icon img,
.btn-dl-icon img {
  filter: none;
}

[class*="-icon"] img,
[class*="-icon"] svg {
  color: var(--color-icon-accent);
}

.section-header h2 {
  font-size: 1.9rem;
  font-weight: 600;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.section-lead {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin: 0;
}

.debut-img-wrap,
.launch-img-wrap,
.cap-img-wrap,
.security-img-wrap,
.scene-img-wrap {
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-bg-card);
  transition: transform var(--transition-mid), box-shadow var(--transition-mid);
}

.debut-img-wrap:hover,
.launch-img-wrap:hover,
.cap-img-wrap:hover {
  transform: scale(1.01);
  box-shadow: var(--shadow-card-hover);
}

.debut-img-wrap {
  max-width: 100%;
  margin: 0 0 32px;
}

.debut-img-wrap .debut-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: contain;
}

.launch-img-wrap {
  max-width: 100%;
}

.launch-img-wrap .launch-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
}

.cap-img-wrap {
  max-width: 100%;
}

.cap-img-wrap .cap-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
}

.security-img-wrap {
  max-width: 100%;
}

.security-img-wrap .security-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: contain;
}

.scene-img-wrap {
  width: 100%;
  overflow: hidden;
}

.scene-img-wrap .scene-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: contain;
  transition: transform var(--transition-slow);
}

.scene-card:hover .scene-img-wrap .scene-img {
  transform: scale(1.05);
}

.scene-img-wrap--vertical .scene-img {
  aspect-ratio: 3/4;
}

.stage-debut {
  background: var(--color-bg-mid);
}

.debut-grid {
  display: grid;
  grid-template-columns: 1.2fr 380px;
  gap: 48px;
  align-items: start;
}

.debut-text p {
  margin: 0 0 20px;
  color: var(--color-text-muted);
  font-size: 1rem;
}

.debut-text p:last-child {
  margin-bottom: 0;
}

.debut-side {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.debut-card {
  padding: 28px;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-mid);
}

.debut-card:hover {
  border-color: rgba(37, 99, 235, 0.25);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.debut-card-icon {
  display: inline-flex;
  margin-bottom: 16px;
  color: var(--color-icon-accent);
  padding: 8px;
  background: rgba(37, 99, 235, 0.08);
  border-radius: var(--radius-sm);
}

.debut-card-icon img {
  width: 24px;
  height: 24px;
}

.debut-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 12px;
}

.debut-card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.68;
}

.stage-launch {
  background: var(--color-bg-dark);
}

.launch-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.launch-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 16px;
}

.launch-content p {
  margin: 0 0 22px;
  color: var(--color-text-muted);
}

.stage-capability {
  background: var(--color-bg-mid);
}

.cap-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 32px;
}

.cap-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: 100px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.cap-tag:hover {
  background: rgba(37, 99, 235, 0.1);
  color: var(--color-primary);
  border-color: rgba(37, 99, 235, 0.3);
}

.cap-tag img {
  width: 16px;
  height: 16px;
}

.capability-intro {
  max-width: 700px;
  margin: 0 auto 40px;
  text-align: center;
}

.capability-intro p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

.capability-showcase {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.cap-row {
  display: grid;
  gap: 26px;
}

.cap-row-a {
  grid-template-columns: 1.1fr 1fr;
}

.cap-row-b {
  grid-template-columns: 1fr 1.1fr;
}

.cap-row-c {
  grid-template-columns: 1fr;
}

.cap-item {
  padding: 30px;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-mid);
}

.cap-item:hover {
  border-color: rgba(37, 99, 235, 0.2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.cap-item-wide {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  align-items: center;
}

.cap-visual {
  width: 100%;
}

.cap-icon {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--color-icon-accent);
  padding: 6px;
  background: rgba(37, 99, 235, 0.06);
  border-radius: var(--radius-sm);
}

.cap-icon img {
  width: 20px;
  height: 20px;
}

.cap-body h3,
.cap-item h3 {
  font-size: 1.12rem;
  font-weight: 600;
  margin: 0 0 12px;
}

.cap-body p,
.cap-item p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.68;
}

.cap-item-narrow .cap-icon {
  margin-bottom: 12px;
}

.cap-item-full {
  text-align: center;
  padding: 36px 44px;
}

.cap-item-full .cap-icon {
  display: inline-flex;
  margin-bottom: 16px;
}

.cap-item-full .cap-icon img {
  width: 24px;
  height: 24px;
}

.stage-guide {
  background: var(--color-bg-dark);
}

.guide-downloads {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  min-width: 200px;
}

.btn-dl-icon {
  display: flex;
}

.btn-dl-icon img {
  width: 22px;
  height: 22px;
}

.btn-ios .btn-dl-icon img,
.btn-android .btn-dl-icon img {
  filter: invert(1) brightness(1.1);
}

.btn-ios {
  background: linear-gradient(135deg, #000 0%, #333 100%);
  color: #fff;
  border: none;
}

.btn-ios:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.btn-android {
  background: linear-gradient(135deg, #3ddc84 0%, #2e7d32 100%);
  color: #fff;
  border: none;
}

.btn-android:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(61, 220, 132, 0.3);
}

.guide-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}

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

.guide-img-wrap {
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  transition: transform var(--transition-mid);
}

.guide-img-wrap.guide-phone {
  aspect-ratio: 9/16;
  max-width: 150px;
  margin: 0 auto;
  border: 2px solid var(--color-border);
  background: var(--color-bg-mid);
}

.guide-img-wrap.guide-phone:hover {
  transform: translateY(-8px);
  border-color: var(--color-border-hover);
}

.guide-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.guide-step {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.guide-step:hover {
  background: rgba(0, 0, 0, 0.02);
  border-color: var(--color-border);
}

.guide-step-icon {
  display: flex;
  flex-shrink: 0;
  color: var(--color-icon-accent);
  padding: 10px;
  background: rgba(37, 99, 235, 0.08);
  border-radius: var(--radius-sm);
}

.guide-step-icon img {
  width: 28px;
  height: 28px;
}

.guide-num {
  flex-shrink: 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.9;
}

.guide-step h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 0 0 10px;
}

.guide-step p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.68;
}

.stage-security {
  background: var(--color-bg-mid);
}

.security-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.security-content {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.security-block {
  padding: 26px;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  transition: all var(--transition-mid);
}

.security-block:hover {
  border-color: rgba(37, 99, 235, 0.35);
  box-shadow: var(--shadow-card-hover);
}

.security-block-icon {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--color-icon-accent);
}

.security-block-icon img {
  width: 22px;
  height: 22px;
}

.security-block h3 {
  font-size: 1.02rem;
  font-weight: 600;
  margin: 0 0 12px;
}

.security-block p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.68;
}

.stage-scene {
  background: var(--color-bg-dark);
}

.scene-intro {
  max-width: 720px;
  margin: 0 auto 40px;
  text-align: center;
}

.scene-intro p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

.scene-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px;
}

.scene-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-mid);
}

.scene-card:hover {
  border-color: rgba(37, 99, 235, 0.2);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.scene-card-body {
  padding: 28px;
}

.scene-card-icon {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--color-icon-accent);
}

.scene-card-icon img {
  width: 22px;
  height: 22px;
}

.scene-card-body h3 {
  font-size: 1.12rem;
  font-weight: 600;
  margin: 0 0 14px;
}

.scene-card-body p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.68;
}

.stage-terms {
  background: var(--color-bg-mid);
}

.terms-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.terms-item {
  padding: 28px;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-mid);
}

.terms-item:hover {
  border-color: rgba(6, 182, 212, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.06);
}

.terms-item-icon {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--color-icon-accent);
}

.terms-item-icon img {
  width: 22px;
  height: 22px;
}

.terms-item h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--color-accent);
}

.terms-item p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.68;
}

.stage-faq {
  background: var(--color-bg-dark);
}

.faq-list {
  width: 100%;
  max-width: 100%;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-fast);
}

.faq-item:hover {
  background: rgba(255, 255, 255, 0.01);
}

.faq-item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq-item.active {
  background: rgba(59, 130, 246, 0.04);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.faq-question:hover {
  color: var(--color-primary-light);
}

.faq-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin-left: 20px;
  position: relative;
  transition: transform var(--transition-mid);
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: all var(--transition-mid);
}

.faq-icon::before {
  width: 12px;
  height: 2px;
  top: 10px;
  left: 5px;
}

.faq-icon::after {
  width: 2px;
  height: 12px;
  top: 5px;
  left: 10px;
}

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

.faq-item.active .faq-icon::after {
  opacity: 0;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

.faq-answer p {
  margin: 0;
  padding: 0 0 24px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.stage-contact {
  background: var(--color-bg-mid);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 60px;
  align-items: start;
}

.contact-intro h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 14px;
}

.contact-intro p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 28px;
  line-height: 1.7;
}

.contact-intro h3:last-of-type {
  margin-top: 10px;
}

.contact-detail {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-item {
  padding: 24px;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-mid);
}

.contact-item:hover {
  border-color: var(--color-border-hover);
  transform: translateX(4px);
}

.contact-item a:hover {
  color: var(--color-accent);
}

.contact-item-icon {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--color-icon-accent);
}

.contact-item-icon img {
  width: 20px;
  height: 20px;
}

.contact-label {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-text-dim);
  margin-bottom: 8px;
}

.contact-item a,
.contact-item address,
.contact-item p {
  font-size: 0.9375rem;
  color: var(--color-text);
  margin: 0;
}

.contact-item address {
  font-style: normal;
}

.stage-footer {
  padding: 48px 32px 28px;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-mid);
}

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
}

.footer-brand {
  max-width: 400px;
}

.footer-logo-wrap {
  display: inline-block;
  margin-bottom: 12px;
}

.footer-logo {
  height: 36px;
  width: auto;
  filter: invert(1);
}

.footer-slogan {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.footer-nav {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.footer-nav-col h4 {
  margin: 0 0 16px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-nav-col a {
  display: block;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  padding: 6px 0;
  transition: color var(--transition-fast);
}

.footer-nav-col a:hover {
  color: var(--color-primary);
}

.footer-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 24px 36px;
  justify-content: center;
  padding: 24px 0;
}

.footer-trust-item {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer-trust-item strong {
  color: var(--color-text);
  font-weight: 600;
}

.footer-notice {
  padding: 20px 24px;
  background: rgba(15, 23, 42, 0.03);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-primary);
  margin-bottom: 24px;
}

.footer-notice p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-dim);
  line-height: 1.7;
}

.footer-bottom {
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-dim);
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.65s cubic-bezier(0.4, 0, 0.2, 1), transform 0.65s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .terms-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .debut-img-wrap {
    max-width: 100%;
  }

  .launch-layout {
    grid-template-columns: 1fr;
  }

  .launch-img-wrap {
    max-width: 100%;
  }

  .cap-row-a,
  .cap-row-b {
    grid-template-columns: 1fr;
  }

  .cap-item-wide {
    grid-template-columns: 1fr;
  }

  .cap-img-wrap {
    max-width: 100%;
  }

  .guide-content {
    grid-template-columns: 1fr;
  }

  .guide-img-wrap.guide-phone {
    max-width: 200px;
  }

  .security-layout {
    grid-template-columns: 1fr;
  }

  .security-img-wrap {
    max-width: 100%;
  }

  .scene-cards {
    grid-template-columns: 1fr;
  }

  .contact-content {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-nav {
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .nav-inner {
    padding: 0 20px;
  }

  .nav-logo-img {
    height: 36px;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg-mid);
    padding: 20px;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .stage-footer {
    padding: 32px 20px 24px;
  }

  .footer-trust {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

  .footer-notice {
    padding: 16px;
  }

  .stage-section {
    padding: 64px 20px;
  }

  .section-header {
    margin-bottom: 44px;
  }

  .section-header h2 {
    font-size: 1.6rem;
  }

  .guide-visuals {
    grid-template-columns: 1fr;
    justify-items: center;
  }

  .guide-img-wrap.guide-phone {
    max-width: 100%;
    aspect-ratio: 9/16;
    max-width: 180px;
  }

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

  .cap-tags {
    gap: 10px;
  }

  .cap-tag {
    padding: 6px 12px;
    font-size: 0.8125rem;
  }
}