* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: #0a0a1a;
  color: #e0e0ff;
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 5px 20px;
}

.section-container {
  width: 90%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  position: sticky;
  top: 0;
  background: rgba(10, 10, 26, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
}

.logo img {
  height: 20px;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: #b0b0d0;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.nav-links a:hover, .nav-links a.active {
  color: #8b5cf6;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-dropdown {
  position: relative;
  display: inline-block;
}

.lang-btn {
  background: rgba(139, 92, 246, 0.15);
  color: #ccc;
  border: 1px solid rgba(139, 92, 246, 0.3);
  padding: 6px 14px;
  font-size: 0.85rem;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.lang-btn:hover {
  background: rgba(139, 92, 246, 0.25);
}

.lang-dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  background: #111122;
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  z-index: 1001;
  min-width: 140px;
  margin-top: 6px;
}

.lang-dropdown-content a {
  color: #c0c0e0;
  padding: 8px 16px;
  text-decoration: none;
  display: block;
  font-size: 0.85rem;
  transition: background 0.2s, color 0.2s;
}

.lang-dropdown-content a:hover {
  background: rgba(139, 92, 246, 0.15);
  color: #8b5cf6;
}

.lang-dropdown.show .lang-dropdown-content {
  display: block;
}

.arrow {
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid #ccc;
  margin-left: 4px;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 6px;
  cursor: pointer;
  padding: 8px;
  transition: all 0.3s;
}

.mobile-menu-btn:hover {
  background: rgba(139, 92, 246, 0.15);
}

.hamburger-line {
  display: block;
  width: 20px;
  height: 2px;
  background: #b0b0d0;
  border-radius: 2px;
  transition: all 0.3s;
}

.mobile-menu-btn.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero Section */
.hero {
  min-height: 90vh;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  overflow: hidden;
  padding: 60px 0;
}

.hero-bg {
  pointer-events: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 1200px;
  height: 900px;
  max-width: 100%;
  object-fit: contain;
  opacity: 0.5;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 3;
  padding: 0 20px;
  max-width: 1000px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 80px;
}

.hero-text-top {
  text-align: center;
}

.hero-bottom {
  display: flex;
  justify-content: space-between;
  gap: 60px;
  width: 100%;
}

.hero-text-bottom {
  flex: 1;
  text-align: left;
}

.hero-title-img {
  width: 280px;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 1.1rem;
  margin: 0 0 16px;
  color: #d0d0ff;
  line-height: 1.5;
}

.hero-desc {
  font-size: 0.85rem;
  color: #a0a0c0;
  margin: 0 0 24px;
  line-height: 1.8;
  text-align: left;
}

.hero-btn {
  text-decoration: none;
  background: transparent;
  color: #8b5cf6;
  border: 1px solid #8b5cf6;
  padding: 10px 28px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
}

.hero-btn:hover {
  background: rgba(139, 92, 246, 0.1);
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
}

/* Video Placeholder */
.video-placeholder {
  position: relative;
  width: 320px;
  height: 175px; /* Maintains 848:464 aspect ratio (320 / 848 * 464 ≈ 175) */
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: all 0.3s;
  flex-shrink: 0;
}

.video-placeholder:hover {
  border-color: #8b5cf6;
}

.video-placeholder video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-play-btn {
  width: 60px;
  height: 60px;
  background: rgba(139, 92, 246, 0.15);
  border: 2px solid rgba(139, 92, 246, 0.5);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: all 0.3s;
}

.video-play-btn:hover {
  background: rgba(139, 92, 246, 0.25);
  transform: scale(1.1);
}

.play-icon {
  width: 0;
  height: 0;
  border-left: 16px solid #8b5cf6;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  margin-left: 4px;
}

/* Sections */
.section {
  padding: 80px 0;
  position: relative;
}

.section-title {
  text-align: center;
  font-size: 1.8rem;
  margin-bottom: 50px;
  color: #8b5cf6;
  background: linear-gradient(90deg, #8b5cf6, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Features Section - Sphere Layout */
.features-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  grid-template-rows: auto auto;
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
  align-items: center;
  padding: 0 20px;
}

.features-center {
  grid-column: 2;
  grid-row: 1 / 3;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 30px;
}

.features-sphere {
  width: 300px;
  height: auto;
  filter: drop-shadow(0 0 50px rgba(139, 92, 246, 0.4));
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.feature-card {
  background: rgba(15, 15, 35, 0.9);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: 16px;
  padding: 24px;
  text-align: left;
  transition: all 0.3s;
  min-height: 130px;
}

.feature-card:hover {
  border-color: rgba(139, 92, 246, 0.6);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.15);
}

.feature-top-left {
  grid-column: 1;
  grid-row: 1;
}

.feature-top-right {
  grid-column: 3;
  grid-row: 1;
}

.feature-bottom-left {
  grid-column: 1;
  grid-row: 2;
}

.feature-bottom-right {
  grid-column: 3;
  grid-row: 2;
}

.feature-icon {
  margin-bottom: 12px;
}

.feature-title {
  font-size: 1rem;
  margin-bottom: 6px;
  color: #e0e0ff;
  font-weight: 600;
}

.feature-desc {
  color: #a0a0c0;
  font-size: 0.85rem;
}

/* Core Tech Section */
.tech-section {
  background: linear-gradient(180deg, #0a0a1a 0%, #0d0d25 100%);
  position: relative;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
}

.tech-item {
  background: rgba(15, 15, 35, 0.9);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s;
  position: relative;
  border: 1px solid transparent;
  background-clip: padding-box;
}

.tech-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 12px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.5) 0%, rgba(236, 72, 153, 0.3) 50%, rgba(139, 92, 246, 0.5) 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.tech-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(139, 92, 246, 0.2);
}

.tech-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  padding: 0px;
  background: transparent;
}

.tech-content {
  padding: 20px;
}

.tech-title {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: #e0e0ff;
  font-weight: 600;
}

.tech-desc {
  color: #a0a0c0;
  font-size: 0.85rem;
  line-height: 1.6;
}

/* Economy Section */
.economy-container {
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
  gap: 80px;
  padding: 20px;
}

.economy-text {
  flex: 1;
  background: rgba(15, 15, 35, 0.8);
  padding: 28px;
  border-radius: 12px;
  border: 1px solid rgba(139, 92, 246, 0.2);
  color: #e0e0ff;
  font-size: 0.9rem;
  line-height: 1.8;
}

.economy-text strong {
  color: #8b5cf6;
}

.economy-text ul {
  list-style: none;
  margin-top: 12px;
  color: #c0c0e0;
}

.economy-text ul li {
  padding: 4px 0;
}

.economy-chart {
  flex: 0 0 280px;
  text-align: center;
}

.economy-chart img {
  width: 100%;
  max-width: 280px;
  height: auto;
  object-fit: contain;
}

/* Roadmap Section - Timeline Style */
.roadmap-timeline {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 40px;
}

.roadmap-phase {
  display: flex;
  gap: 40px;
  margin-bottom: 50px;
  position: relative;
}

.phase-left {
  width: 160px;
  flex-shrink: 0;
  text-align: right;
  padding-top: 4px;
}

.phase-date {
  font-size: 1rem;
  font-weight: 700;
  color: #8b5cf6;
  margin-bottom: 8px;
}

.phase-subtitle {
  font-size: 0.8rem;
  color: #a0a0c0;
  line-height: 1.4;
}

.phase-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  width: 20px;
}

.phase-dot {
  width: 16px;
  height: 16px;
  border: 2px solid #8b5cf6;
  border-radius: 50%;
  background: #0a0a1a;
  z-index: 2;
  flex-shrink: 0;
}

.phase-line {
  width: 2px;
  flex: 1;
  background: linear-gradient(180deg, #8b5cf6 0%, rgba(139, 92, 246, 0.3) 100%);
  margin-top: 4px;
}

.roadmap-phase:last-child .phase-line {

}

.phase-right {
  flex: 1;
  padding-bottom: 20px;
}

.phase-content {
  background: rgba(15, 15, 35, 0.6);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 12px;
  padding: 20px;
}

.phase-items {
  list-style: none;
  padding: 0;
  margin: 0;
}

.phase-items li {
  color: #c0c0e0;
  font-size: 0.85rem;
  line-height: 1.8;
  padding: 4px 0;
  padding-left: 16px;
  position: relative;
}

.phase-items li::before {
  content: "•";
  color: #8b5cf6;
  position: absolute;
  left: 0;
}

/* Partners */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 900px;
  margin: 40px auto 0;
  justify-items: center;
  padding: 0 20px;
}

.partner-item {
  width: 180px;
  height: 90px;
  background: white;
  border: 1px solid rgba(139, 92, 246, 0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: all 0.3s;
}

.partner-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.15);
}

.partner-item img {
  max-width: 130px;
  max-height: 55px;
  object-fit: contain;
}

/* Footer - Left-Right Layout */
footer {
  background: linear-gradient(180deg, #0a0a1a 0%, #050510 100%);
  padding: 60px 0 40px;
  border-top: 1px solid rgba(139, 92, 246, 0.15);
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  max-width: 1000px;
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.footer-logo img {
  height: 40px;
}

.social-icons {
  display: flex;
  gap: 14px;
}

.social-icon {
  width: 40px;
  height: 40px;
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #8b5cf6;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  overflow: hidden;
}

.social-icon img {
  width: 20px;
  height: 20px;
  object-fit: contain;
}

.social-icon:hover {
  background: rgba(139, 92, 246, 0.25);
  border-color: #8b5cf6;
  transform: translateY(-2px);
}

.footer-right {
  display: flex;
  gap: 100px;
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-column a {
  color: #a0a0c0;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-column a:hover {
  color: #8b5cf6;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-content {
    gap: 60px;
    padding: 0 30px;
  }
  .video-placeholder {
    width: 280px;
    height: 153px; /* Maintains 848:464 aspect ratio (280 / 848 * 464 ≈ 153) */
  }
  .features-wrapper {
    gap: 20px;
    max-width: 90%;
  }
  .features-sphere {
    width: 240px;
  }
  .footer-right {
    gap: 60px;
  }
}

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

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 10, 26, 0.98);
    backdrop-filter: blur(10px);
    padding: 20px;
    gap: 0;
    border-bottom: 1px solid rgba(139, 92, 246, 0.2);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    padding: 14px 0;
    border-bottom: 1px solid rgba(139, 92, 246, 0.1);
    font-size: 1rem;
  }

  .nav-links a:last-child {
    border-bottom: none;
  }

  .hero {
    min-height: 80vh;
    padding: 40px 0;
  }

  .hero-content {
    gap: 40px;
  }
  .hero-bottom {
    flex-direction: column;
    gap: 24px;
  }
  .video-placeholder {
    order: -1;
  }
  .hero-text-bottom {
    text-align: center;
  }
  .hero-desc {
    text-align: center;
  }
  .video-placeholder {
    width: 100%;
    height: auto;
    aspect-ratio: 848 / 464;
  }
  .hero-title-img {
    width: 220px;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.6rem;
    margin-bottom: 40px;
  }

  .features-wrapper {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 16px;
    padding: 0 16px;
  }
  .features-center {
    grid-column: 1;
    grid-row: 1;
    order: -1;
  }
  .feature-top-left,
  .feature-top-right,
  .feature-bottom-left,
  .feature-bottom-right {
    grid-column: 1;
    grid-row: auto;
  }
  .features-sphere {
    width: 200px;
    margin: 10px 0;
  }
  .feature-card {
    min-height: auto;
    padding: 20px;
  }

  .economy-container {
    flex-direction: column;
    text-align: center;
    gap: 40px;
    padding: 0 20px;
  }
  .economy-chart {
    flex: 0 0 auto;
  }

  .tech-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 0 16px;
  }

  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 0 16px;
  }
  .partner-item {
    width: 100%;
    max-width: 160px;
    height: 80px;
  }

  .roadmap-timeline {
    padding: 0 20px;
  }
  .roadmap-phase {
    flex-direction: column;
    gap: 12px;
    margin-bottom: 30px;
  }
  .phase-left {
    width: 100%;
    text-align: left;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: baseline;
  }
  .phase-subtitle {
    display: inline;
  }
  .phase-center {
    display: none;
  }
  .phase-content {
    padding: 16px;
  }

  footer {
    padding: 40px 0 30px;
  }
  footer .container {
    flex-direction: column;
    gap: 30px;
    align-items: center;
    text-align: center;
  }
  .footer-left {
    align-items: center;
  }
  .footer-right {
    gap: 50px;
  }
}

@media (max-width: 480px) {
  .hero-title-img {
    width: 180px;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .hero-desc {
    font-size: 0.8rem;
  }

  .partners-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .partner-item {
    max-width: 140px;
    height: 70px;
  }
  .partner-item img {
    max-width: 100px;
    max-height: 40px;
  }

  .video-placeholder {
    width: 100%;
    height: auto;
    aspect-ratio: 848 / 464;
  }

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

  .footer-right {
    flex-direction: column;
    gap: 24px;
  }

  .social-icon {
    width: 36px;
    height: 36px;
    font-size: 0.8rem;
  }
}