:root {
  --banana-yellow: #FFD93D;
  --soft-cream: #FFF9E6;
  --bg-white: #FFFFFF;
  --bg-light-blue: #EAF4F4;
  --text-dark: #333333;
  --text-gray: #666666;
  --border-color: #222222;
  --border-radius-lg: 24px;
  --border-radius-md: 16px;
  --border-radius-pill: 50px;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-white);
  color: var(--text-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a {
  text-decoration: none;
  color: inherit;
}
ul {
  list-style: none;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--border-color);
  z-index: 1000;
  padding: 12px 0;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo-group {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1px;
}
.logo-group img {
  height: 36px;
  width: auto;
}
.nav-links {
  display: flex;
  gap: 24px;
  font-weight: 600;
  font-size: 15px;
}
.nav-links a:hover {
  color: #E5B800;
}
.header-download-btn {
  background-color: var(--banana-yellow);
  color: var(--border-color);
  padding: 8px 20px;
  border-radius: var(--border-radius-pill);
  font-weight: 700;
  border: 2px solid var(--border-color);
  transition: transform 0.2s;
}
.header-download-btn:hover {
  transform: scale(1.05);
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 60px 0;
  background: linear-gradient(135deg, var(--soft-cream) 0%, var(--bg-light-blue) 100%);
  overflow: hidden;
}
.hero-bg-shapes {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 0;
}
.shape-circle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 217, 61, 0.15);
}
.shape-1 { width: 400px; height: 400px; top: -100px; right: -100px; }
.shape-2 { width: 200px; height: 200px; bottom: 50px; left: -50px; background: rgba(234, 244, 244, 0.5); }
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.hero-text h1 {
  font-size: 42px;
  line-height: 1.2;
  margin-bottom: 20px;
  font-weight: 900;
}
.hero-text h1 span {
  background: linear-gradient(transparent 60%, var(--banana-yellow) 60%);
}
.hero-desc {
  font-size: 18px;
  color: var(--text-gray);
  margin-bottom: 30px;
}
.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}
.feature-tag {
  background: var(--bg-white);
  border: 1px solid #E0E0E0;
  padding: 6px 16px;
  border-radius: var(--border-radius-pill);
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}
.feature-tag::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--banana-yellow);
  border-radius: 50%;
  border: 1px solid var(--border-color);
}
.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.download-btn-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--border-color);
  color: var(--bg-white);
  padding: 12px 28px;
  border-radius: var(--border-radius-pill);
  min-width: 160px;
  transition: transform 0.2s;
}
.download-btn-group:hover {
  transform: translateY(-3px);
}
.download-btn-group small {
  font-size: 11px;
  opacity: 0.8;
  margin-bottom: 2px;
}
.download-btn-group strong {
  font-size: 16px;
  font-weight: 700;
}
.download-btn-group.outline {
  background: transparent;
  color: var(--border-color);
  border: 2px solid var(--border-color);
}
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  gap: 20px;
}
.hero-cover {
  width: 220px;
  border-radius: 12px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
  transition: transform 0.3s;
  border: 3px solid var(--bg-white);
}
.hero-cover:nth-child(1) { transform: translateY(30px) rotate(-5deg); }
.hero-cover:nth-child(2) { transform: translateY(-10px) rotate(3deg); z-index: 2; }
.hero-cover:nth-child(3) { transform: translateY(40px) rotate(8deg); }
.hero-cover:hover { transform: translateY(-5px) rotate(0) scale(1.05); z-index: 10; }

/* Section: Summer List */
.section-padding {
  padding: 80px 0;
}
.section-header {
  text-align: center;
  margin-bottom: 50px;
}
.section-header h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 12px;
}
.section-header p {
  color: var(--text-gray);
  font-size: 16px;
  max-width: 600px;
  margin: 0 auto;
}
.masonry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
  align-items: start;
}
.masonry-card {
  background: var(--bg-white);
  padding: 16px;
  border-radius: var(--border-radius-md);
  box-shadow: 0 10px 25px rgba(0,0,0,0.06);
  border: 1px solid #F0F0F0;
  transition: transform 0.3s, box-shadow 0.3s;
}
.masonry-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 35px rgba(0,0,0,0.12);
}
.masonry-card img {
  width: 100%;
  border-radius: 8px;
  object-fit: cover;
}
.masonry-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-top: 12px;
  margin-bottom: 4px;
}
.masonry-card p {
  font-size: 13px;
  color: var(--text-gray);
}
.masonry-card:nth-child(even) {
  margin-top: 40px;
}

/* Section: New Releases */
.timeline-section {
  background-color: var(--bg-light-blue);
}
.timeline-container {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}
.timeline-container::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 120px;
  width: 2px;
  background: #D0D0D0;
}
.timeline-item {
  display: flex;
  margin-bottom: 40px;
  position: relative;
}
.timeline-date {
  width: 100px;
  text-align: right;
  padding-right: 20px;
  flex-shrink: 0;
  padding-top: 5px;
}
.timeline-date span {
  display: block;
  font-size: 14px;
  font-weight: 800;
  color: var(--border-color);
}
.timeline-date small {
  font-size: 12px;
  color: var(--text-gray);
}
.timeline-dot {
  position: absolute;
  left: 116px;
  top: 10px;
  width: 10px;
  height: 10px;
  background: var(--banana-yellow);
  border: 2px solid var(--border-color);
  border-radius: 50%;
  z-index: 2;
}
.timeline-content {
  margin-left: 40px;
  background: var(--bg-white);
  padding: 20px;
  border-radius: var(--border-radius-md);
  box-shadow: 0 4px 15px rgba(0,0,0,0.04);
  display: flex;
  gap: 20px;
  flex: 1;
  transition: transform 0.2s;
  border: 1px solid #EAEAEA;
}
.timeline-content:hover {
  transform: translateX(10px);
  border-color: var(--banana-yellow);
}
.timeline-img {
  width: 80px;
  height: 110px;
  border-radius: 6px;
  object-fit: cover;
  flex-shrink: 0;
}
.timeline-info h3 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 6px;
}
.timeline-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}
.timeline-tags span {
  font-size: 11px;
  background: var(--soft-cream);
  padding: 2px 8px;
  border-radius: 10px;
  color: #B28F00;
  font-weight: 600;
  border: 1px solid #F0E6B6;
}
.timeline-info p {
  font-size: 13px;
  color: var(--text-gray);
  line-height: 1.5;
}

/* Section: Gallery */
.gallery-section {
  padding: 80px 0;
  overflow: hidden;
}
.gallery-carousel {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  overflow-x: auto;
  scrollbar-width: none;
  scroll-snap-type: x mandatory;
}
.gallery-carousel::-webkit-scrollbar {
  display: none;
}
.gallery-item {
  flex: 0 0 auto;
  width: 80%;
  max-width: 800px;
  scroll-snap-align: center;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  position: relative;
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}
.gallery-item img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}
.gallery-thumbs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 30px;
}
.thumb-img {
  width: 60px;
  height: 80px;
  object-fit: cover;
  border-radius: 6px;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 0.3s, border 0.3s;
  border: 2px solid transparent;
}
.thumb-img:hover, .thumb-img.active {
  opacity: 1;
  border-color: var(--banana-yellow);
}

/* Section: Split Dashboard */
.split-section {
  background: var(--soft-cream);
}
.split-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  align-items: stretch;
}
.split-panel {
  background: var(--bg-white);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  border: 2px solid var(--border-color);
  display: flex;
  flex-direction: column;
}
.split-panel h2 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 16px;
}
.split-panel > p {
  font-size: 15px;
  color: var(--text-gray);
  margin-bottom: 30px;
  flex-grow: 1;
}
.mock-ui {
  background: #FAFAFA;
  border: 1px solid #E0E0E0;
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
}
.mock-ui-header {
  height: 24px;
  width: 60%;
  background: #EAEAEA;
  border-radius: 4px;
}
.mock-ui-text {
  height: 12px;
  width: 100%;
  background: #F0F0F0;
  border-radius: 4px;
}
.mock-ui-text.short {
  width: 80%;
}
.mock-ui-image {
  height: 120px;
  background: #E5E5E5;
  border-radius: 8px;
  margin-top: 10px;
}
.data-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}
.device-icon {
  width: 60px;
  height: 60px;
  border: 2px solid var(--border-color);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  background: var(--bg-white);
}
.flow-line {
  flex-grow: 1;
  height: 2px;
  background: repeating-linear-gradient(to right, transparent, transparent 5px, var(--border-color) 5px, var(--border-color) 10px);
  position: relative;
}
.flow-line::after {
  content: '';
  position: absolute;
  top: -4px; right: 0;
  width: 10px; height: 10px;
  border-top: 2px solid var(--border-color);
  border-right: 2px solid var(--border-color);
  transform: rotate(45deg);
}

/* Section: FAQ */
.faq-section {
  padding: 80px 0;
}
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--bg-white);
  border: 1px solid #E0E0E0;
  border-radius: var(--border-radius-pill);
  overflow: hidden;
  transition: border-color 0.3s;
}
.faq-item.active {
  border-color: var(--banana-yellow);
  background: var(--soft-cream);
}
.faq-question {
  padding: 20px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
}
.faq-icon {
  font-size: 24px;
  font-weight: 300;
  transition: transform 0.3s;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 30px;
  font-size: 15px;
  color: var(--text-gray);
}
.faq-item.active .faq-answer {
  max-height: 200px;
  padding: 0 30px 20px 30px;
}

/* Section: Install Guide */
.install-section {
  padding: 60px 0;
  background: var(--bg-light-blue);
}
.install-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}
.step-card {
  background: var(--bg-white);
  border-radius: var(--border-radius-md);
  padding: 30px;
  text-align: center;
  border: 1px solid #E0E0E0;
}
.step-card h3 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--text-dark);
}
.step-card p {
  font-size: 14px;
  color: var(--text-gray);
}
.install-notes {
  text-align: center;
  color: var(--text-gray);
  font-size: 14px;
  line-height: 2;
}
.install-notes strong {
  color: var(--text-dark);
}

/* Footer */
.site-footer {
  background: var(--border-color);
  color: var(--bg-white);
  padding: 50px 0 30px;
  text-align: center;
}
.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 20px;
}
.footer-logo img {
  height: 32px;
}
.footer-desc {
  color: #AAAAAA;
  font-size: 14px;
  max-width: 600px;
  margin: 0 auto 30px;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}
.footer-links a {
  color: #DDDDDD;
  font-size: 14px;
}
.footer-links a:hover {
  color: var(--banana-yellow);
}
.copyright {
  font-size: 12px;
  color: #666;
  border-top: 1px solid #444;
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.copyright time {
  font-size: 12px;
  color: #555;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 20px;
}
.modal-content {
  background: var(--bg-white);
  border-radius: var(--border-radius-md);
  padding: 30px;
  width: 100%;
  max-width: 400px;
  text-align: center;
}
.modal-content p {
  font-size: 15px;
  margin-bottom: 20px;
  color: var(--text-dark);
}
.modal-link {
  display: block;
  background: #F5F5F5;
  padding: 12px;
  border-radius: 8px;
  font-size: 13px;
  word-break: break-all;
  margin-bottom: 20px;
  color: #333;
}
.copy-btn {
  background: var(--banana-yellow);
  color: var(--border-color);
  border: 2px solid var(--border-color);
  padding: 10px 24px;
  border-radius: var(--border-radius-pill);
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  transition: transform 0.2s;
}
.copy-btn:hover {
  transform: scale(1.05);
}
.close-modal {
  margin-top: 15px;
  font-size: 14px;
  color: var(--text-gray);
  cursor: pointer;
}

/* Media Queries */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-features, .hero-buttons {
    justify-content: center;
  }
  .hero-visual {
    margin-top: 40px;
  }
  .split-container {
    grid-template-columns: 1fr;
  }
  .install-steps {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .hero-text h1 {
    font-size: 32px;
  }
  .hero-cover {
    width: 140px;
  }
  .timeline-container::before {
    left: 20px;
  }
  .timeline-date {
    width: auto;
    text-align: left;
    padding-left: 40px;
    padding-bottom: 5px;
  }
  .timeline-dot {
    left: 16px;
  }
  .timeline-content {
    flex-direction: column;
    margin-left: 40px;
    margin-top: 10px;
  }
  .timeline-img {
    width: 100%;
    height: 200px;
  }
  .gallery-item {
    width: 95%;
  }
  .gallery-item img {
    height: 250px;
  }
  .masonry-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}