:root {
  --primary-color: #060f64;
  --primary-light: #1a2b8a;
  --primary-dark: #040a4d;
  --secondary-color: #f2f2f7;
  --accent-color: #1C731C;
  --text-dark: #1d1d1f;
  --text-light: #86868b;
  --white: #ffffff;
  --black: #000000;
  --sirun-blue: #060f64;
  --gradient: linear-gradient(135deg, #060f64 0%, #040a4d 100%);
  --shadow: 0 4px 20px rgba(6, 15, 100, 0.15);
  --shadow-hover: 0 8px 40px rgba(6, 15, 100, 0.25);
}

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

body {
  font-family: "SF Pro Display", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
  transition: all 0.3s ease;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transform: translateY(-100%);
}

.header.visible {
  transform: translateY(0);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.header.apple-style {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(25px) saturate(1.6) brightness(1.1);
  -webkit-backdrop-filter: blur(25px) saturate(1.6) brightness(1.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  transition: transform 0.3s ease;
}

.logo:hover {
  transform: scale(1.05);
}

.logo-image {
  width: 40px;
  height: 40px;
  object-fit: contain;
  transition: transform 0.3s ease;
  transform: rotate(45deg);
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 600;
  color: #060f64;
  letter-spacing: -0.5px;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  text-decoration: none;
  color: #060f64;
  font-weight: 400;
  font-size: 0.95rem;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--primary-light);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 30px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1002;
  transition: all 0.3s ease;
}

.hamburger-line {
  width: 100%;
  height: 3px;
  background: var(--sirun-blue);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}

.mobile-menu-btn.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

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

.mobile-menu-btn.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

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

.hero-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
}

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

.video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.3);
  z-index: -1;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  z-index: 2;
  position: relative;
  transition: opacity 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.hero-title {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.1;
  letter-spacing: -2px;
  color: white;
}

.hero-title-line {
  display: block;
  opacity: 0;
  transform: translateY(50px);
  animation: fadeInUp 1s ease forwards;
}

.hero-title-line:nth-child(2) {
  animation-delay: 0.2s;
}

.hero-slogan {
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.3s;
}

.hero-slogan-blue {
  color: var(--primary-color) !important;
}

.hero-subtitle {
  font-size: 1.3rem;
  margin-bottom: 3rem;
  opacity: 0.9;
  font-weight: 400;
  color: white;
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.4s;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 4rem;
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.6s;
}

.hero-scroll {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0.7;
  font-size: 0.9rem;
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.8s;
}

.hero-scroll i {
  animation: bounce 2s infinite;
}

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  border-radius: 50px;
  font-weight: 500;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--primary-color);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.product-showcase {
  padding: 8rem 0;
  background: var(--black);
  color: var(--white);
  position: relative;
}

.showcase-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  align-items: center;
}

.showcase-text h2 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.showcase-text p {
  font-size: 1.2rem;
  opacity: 0.8;
}

.showcase-video {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
}

.showcase-video video {
  width: 100%;
  height: auto;
  display: block;
}

.showcase-features {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.feature-point {
  position: absolute;
  cursor: pointer;
}

.feature-point[data-feature="motor"] {
  top: 25%;
  left: 30%;
}

.feature-point[data-feature="battery"] {
  top: 50%;
  right: 20%;
}

.feature-point[data-feature="control"] {
  bottom: 25%;
  left: 50%;
}

.point-marker {
  width: 20px;
  height: 20px;
  background: var(--primary-color);
  border-radius: 50%;
  position: relative;
  animation: pulse 2s infinite;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 0 0 0 rgba(6, 15, 100, 0.7);
}

.point-marker:hover {
  transform: scale(1.2);
  background: var(--primary-dark);
}

.point-marker::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  border: 2px solid var(--primary-color);
  border-radius: 50%;
  animation: ripple 2s infinite;
}

.point-marker::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  border: 1px solid rgba(6, 15, 100, 0.3);
  border-radius: 50%;
  animation: blink 3s infinite;
}

.feature-tooltip {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.95);
  padding: 1rem;
  border-radius: 10px;
  min-width: 200px;
  max-width: 280px;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 10;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.feature-point:hover .feature-tooltip {
  opacity: 1;
  visibility: visible;
}

.feature-tooltip h4 {
  margin-bottom: 0.5rem;
  color: var(--white);
  font-size: 0.95rem;
  font-weight: 600;
}

.feature-tooltip p {
  font-size: 0.85rem;
  opacity: 0.9;
  line-height: 1.4;
}

.section {
  padding: 6rem 0;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.section-title {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -1px;
}

.section-title p {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.section.out-of-focus {
  filter: blur(1.5px);
  transform: scale(0.995);
  opacity: 0.92;
}

.section.in-focus {
  filter: blur(0px);
  transform: scale(1);
  opacity: 1;
}

.section.blur-out {
  filter: blur(2.5px) brightness(0.96);
  transform: scale(0.99) translateY(5px);
  opacity: 0.85;
}

.section.blur-in {
  filter: blur(0px) brightness(1);
  transform: scale(1) translateY(0px);
  opacity: 1;
}

.about {
  background: var(--secondary-color);
}

.about-content {
  display: grid;
  gap: 4rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.stat-card {
  background: var(--white);
  padding: 2rem;
  border-radius: 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-5px);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-light);
  font-size: 0.9rem;
}

.about-video {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}

.about-video video {
  width: 100%;
  height: auto;
}

.video-section-title {
  text-align: center;
  margin-bottom: 2rem;
}

.video-section-title h3 {
  font-size: 2rem;
  font-weight: 600;
  color: #060f64;
  margin-bottom: 0.5rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.feature-card {
  background: var(--white);
  padding: 2.5rem;
  border-radius: 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.feature-card h3 {
  margin-bottom: 1rem;
  color: var(--text-dark);
  font-size: 1.3rem;
}

.feature-card p {
  color: var(--text-light);
  line-height: 1.6;
}

.product-details {
  background: var(--secondary-color);
}

.product-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.product-info h2 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.product-tagline {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 3rem;
}

.product-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.spec {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.spec-label {
  font-size: 0.9rem;
  color: var(--text-light);
}

.spec-value {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
}

.product-visual img {
  width: 100%;
  height: auto;
  border-radius: 20px;
}

.questionnaire {
  background: var(--white);
}

.quiz-container {
  max-width: 800px;
  margin: 0 auto;
  background: var(--secondary-color);
  border-radius: 20px;
  padding: 3rem;
}

.quiz-progress {
  margin-bottom: 3rem;
  text-align: center;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(6, 15, 100, 0.2);
  border-radius: 4px;
  margin-bottom: 1rem;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--primary-color);
  border-radius: 4px;
  width: 20%;
  transition: width 0.3s ease;
}

.progress-text {
  color: var(--text-light);
  font-size: 0.9rem;
}

.question {
  display: none;
  text-align: center;
}

.question.active {
  display: block;
}

.question h3 {
  font-size: 1.5rem;
  margin-bottom: 2rem;
  color: var(--text-dark);
}

.quiz-options {
  display: grid;
  gap: 1rem;
  margin-bottom: 2rem;
}

.quiz-option {
  background: var(--white);
  border: 2px solid transparent;
  padding: 1.5rem;
  border-radius: 15px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
  text-align: left;
}

.quiz-option:hover {
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

.quiz-option.selected {
  border-color: var(--primary-color);
  background: rgba(6, 15, 100, 0.1);
}

.quiz-result {
  text-align: center;
}

.result-content h3 {
  font-size: 2rem;
  color: var(--accent-color);
  margin-bottom: 1rem;
}

.result-benefits {
  margin: 2rem 0;
}

.benefit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.benefit i {
  color: var(--accent-color);
  font-size: 1.2rem;
}

.quiz-navigation {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
}

.quiz-navigation .btn-secondary {
  background: rgba(4, 21, 96, 0.1);
  color: #041560;
  border: 2px solid #041560;
}

.quiz-navigation .btn-secondary:hover {
  background: #041560;
  color: var(--white);
  border: 2px solid #041560;
}

.quiz-navigation .btn-primary {
  background: #041560;
  color: var(--white);
}

.quiz-navigation .btn-primary:hover {
  background: #030f4a;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.store {
  background: var(--secondary-color);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.product-card,
.feature-card {
  background: var(--white);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: filter 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    opacity 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.product-card:hover,
.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
}

.product-card.featured {
  border: 2px solid var(--primary-color);
}

.product-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--primary-color);
  color: var(--white);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  z-index: 1;
}

.product-card.coming-soon {
  opacity: 0.6;
  pointer-events: none;
}

.product-card.coming-soon .product-image img {
  filter: grayscale(100%);
}

.coming-soon-badge {
  background: var(--text-light);
}

.product-image {
  height: 250px;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.product-card:hover .product-image img {
  transform: scale(1.05);
}

.product-info {
  padding: 2rem;
}

.product-info h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}

.product-description {
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

.product-features {
  margin-bottom: 2rem;
}

.feature {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.feature i {
  color: var(--primary-color);
  width: 16px;
}

.product-price {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.price-original {
  text-decoration: line-through;
  color: var(--text-light);
  font-size: 1rem;
}

.price-current {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.price-note {
  display: block;
  font-size: 0.75rem;
  color: var(--text-light);
  margin-top: 0.25rem;
  font-style: italic;
}

.add-to-cart {
  width: 100%;
  padding: 1rem;
  font-weight: 600;
}

.add-to-cart[disabled] {
  background: var(--text-light);
  cursor: not-allowed;
  opacity: 0.8;
}

.add-to-cart[disabled]:hover {
  transform: none;
  box-shadow: none;
}

.form-alerts {
  margin-bottom: 1rem;
  min-height: 0;
  transition: all 0.3s ease;
}

.form-success-message {
  background: linear-gradient(135deg, #28a745, #20c997);
  color: white;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  margin-bottom: 0.75rem;
  text-align: left;
  display: none;
  box-shadow: 0 4px 12px rgba(40, 167, 69, 0.15);
  border: none;
  position: relative;
  font-size: 0.875rem;
  line-height: 1.4;
  max-width: 100%;
  backdrop-filter: blur(10px);
}

.form-success-message::before {
  content: "✓";
  display: inline-block;
  margin-right: 0.5rem;
  font-weight: bold;
  font-size: 1rem;
}

.form-success-message.show {
  display: block;
  animation: slideInAlert 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.form-error-message {
  background: linear-gradient(135deg, #dc3545, #e74c3c);
  color: white;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  margin-bottom: 0.75rem;
  text-align: left;
  display: none;
  box-shadow: 0 4px 12px rgba(220, 53, 69, 0.15);
  border: none;
  position: relative;
  font-size: 0.875rem;
  line-height: 1.4;
  max-width: 100%;
  backdrop-filter: blur(10px);
}

.form-error-message::before {
  content: "⚠";
  display: inline-block;
  margin-right: 0.5rem;
  font-weight: bold;
  font-size: 1rem;
}

.form-error-message.show {
  display: block;
  animation: slideInAlert 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.cart-summary {
  position: fixed;
  top: 0;
  right: -400px;
  width: 400px;
  height: 100vh;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
  z-index: 1002;
  transition: right 0.3s ease;
  overflow-y: auto;
  padding: 2rem;
}

.cart-summary.open {
  right: 0;
}

.cart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.cart-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-light);
  transition: color 0.3s ease;
}

.cart-close:hover {
  color: var(--text-dark);
}

.cart-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: rgba(242, 242, 247, 0.5);
  border-radius: 12px;
}

.cart-item img {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: 8px;
}

.cart-item-info h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.cart-item-quantity {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 0.25rem;
}

.cart-item-price {
  font-weight: 600;
  color: var(--primary-color);
}

.cart-total {
  margin: 2rem 0;
  padding: 1.5rem;
  background: rgba(242, 242, 247, 0.7);
  border-radius: 12px;
}

.total-line {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  font-size: 1rem;
}

.total-line.total {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--primary-color);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  padding-top: 0.75rem;
  margin-top: 1rem;
}

.cart-actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact {
  background: var(--white);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 2rem;
}

.contact-item i {
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-form {
  background: var(--secondary-color);
  padding: 2rem;
  border-radius: 20px;
  position: relative;
  z-index: 1;
  margin-top: 1rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  border: none;
  border-radius: 10px;
  background: var(--white);
  font-family: inherit;
  font-size: 1rem;
  transition: box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(6, 15, 100, 0.2);
}

.form-group textarea {
  height: 120px;
  resize: vertical;
}

.contact-hours {
  display: block;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 0.25rem;
  font-style: italic;
}

.contact-address {
  display: block;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 0.25rem;
  line-height: 1.6;
}

.contact-form.submitting {
  opacity: 0.7;
  pointer-events: none;
}

.contact-form.submitting .btn {
  background: var(--text-light);
  cursor: not-allowed;
}

.footer {
  background: var(--text-dark);
  color: var(--white);
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
  margin-bottom: 1rem;
  color: var(--white);
}

.footer-section p {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section ul li a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-section ul li a:hover {
  color: var(--white);
}

.footer-section ul li a i {
  width: 16px;
  text-align: center;
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-links a {
  width: 45px;
  height: 45px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: all 0.3s ease;
  font-size: 1.2rem;
}

.social-links a:hover {
  background: var(--primary-color);
  transform: translateY(-2px);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.footer-bottom p {
  margin: 0;
}

.newsletter-section {
  background: rgba(255, 255, 255, 0.05);
  padding: 1.5rem;
  border-radius: 15px;
  margin-top: 1rem;
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.newsletter-form input {
  flex: 1;
  padding: 0.75rem;
  border: none;
  border-radius: 25px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  font-size: 0.9rem;
}

.newsletter-form input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.newsletter-form input:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.15);
}

.newsletter-form button {
  padding: 0.75rem 1.5rem;
  background: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: 25px;
  cursor: pointer;
  transition: background 0.3s ease;
  font-weight: 500;
}

.newsletter-form button:hover {
  background: var(--primary-dark);
}

.contact-info-footer {
  margin-top: 1rem;
}

.contact-info-footer .contact-item-footer {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
}

.contact-info-footer .contact-item-footer i {
  width: 16px;
  color: var(--primary-color);
  text-align: center;
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .newsletter-form {
    flex-direction: column;
  }

  .newsletter-form button {
    align-self: flex-start;
  }

  .social-links {
    justify-content: center;
  }

  .cart-summary {
    width: 100%;
    right: -100%;
  }

  .logo-image {
    width: 35px;
    height: 35px;
    object-fit: contain;
    transform: rotate(45deg);
  }
}

.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: scale(0);
  transition: all 0.3s ease, transform 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-2px) scale(1);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInFromLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInFromRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

@keyframes ripple {
  0% {
    transform: translate(-50%, -50%) scale(0);
    opacity: 1;
  }
  100% {
    transform: translate(-50%, -50%) scale(1.5);
    opacity: 0;
  }
}

@keyframes blink {
  0%,
  50%,
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(1);
  }
  25% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.2);
  }
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(6, 15, 100, 0.7);
  }
  70% {
    box-shadow: 0 0 0 20px rgba(6, 15, 100, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(6, 15, 100, 0);
  }
}

@keyframes slideInFromTop {
  0% {
    opacity: 0;
    transform: translateY(-15px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInAlert {
  0% {
    opacity: 0;
    transform: translateY(-10px) scale(0.95);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transition: right 0.3s ease;
    z-index: 1001;
    padding-top: 80px;
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-link {
    font-size: 1.2rem;
    font-weight: 500;
    padding: 1rem 2rem;
    border-radius: 10px;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 200px;
  }

  .nav-link:hover {
    background: rgba(6, 15, 100, 0.1);
    transform: translateY(-2px);
  }

  .header:not(.visible) .mobile-menu-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 8px;
    padding: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    width: 50px;
    height: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1003;
  }

  .header:not(.visible) .mobile-menu-btn .hamburger-line {
    background: var(--sirun-blue);
    width: 24px;
    height: 3px;
    margin: 2px 0;
  }

  .header.visible .mobile-menu-btn {
    position: relative;
    top: auto;
    right: auto;
    background: none;
    border-radius: 0;
    padding: 0;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    width: 30px;
    height: 30px;
  }

  .header.visible .mobile-menu-btn .hamburger-line {
    background: var(--sirun-blue);
    width: 100%;
    height: 3px;
    margin: 0;
  }

  .hero-title {
    font-size: 2.5rem;
  }

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

  .showcase-content,
  .about-content,
  .product-hero,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .showcase-text h2 {
    font-size: 2rem;
  }

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

  .cart-summary {
    width: 100%;
  }

  .quiz-options {
    grid-template-columns: 1fr;
  }

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

  .product-specs {
    grid-template-columns: 1fr;
  }

  .logo-image {
    width: 35px;
    height: 35px;
    object-fit: contain;
  }

  .logo-text {
    font-size: 1.3rem;
  }

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

  .feature-point[data-feature="motor"] {
    top: 20%;
    left: 25%;
  }

  .feature-point[data-feature="battery"] {
    top: 45%;
    right: 15%;
  }

  .feature-point[data-feature="control"] {
    bottom: 20%;
    left: 40%;
  }

  .feature-tooltip {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    min-width: 280px;
    max-width: 90vw;
    z-index: 1000;
  }

  .feature-point {
    position: relative;
    padding: 15px;
    border-radius: 50%;
    transition: all 0.3s ease;
  }

  .point-marker {
    width: 24px;
    height: 24px;
  }

  .point-marker::after {
    width: 48px;
    height: 48px;
  }

  .point-marker::before {
    width: 70px;
    height: 70px;
  }

  .feature-point:active .feature-tooltip {
    opacity: 1;
    visibility: visible;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .section {
    padding: 4rem 0;
  }

  .section-title h2 {
    font-size: 2rem;
  }

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

  .quiz-container {
    padding: 2rem;
  }

  .logo-image {
    width: 30px;
    height: 30px;
    object-fit: contain;
    transform: rotate(45deg);
  }

  .logo-text {
    font-size: 1.2rem;
  }

  .feature-point[data-feature="motor"] {
    top: 18%;
    left: 20%;
  }

  .feature-point[data-feature="battery"] {
    top: 50%;
    right: 10%;
  }

  .feature-point[data-feature="control"] {
    bottom: 18%;
    left: 35%;
  }

  .point-marker {
    width: 22px;
    height: 22px;
  }

  .point-marker::after {
    width: 44px;
    height: 44px;
  }

  .point-marker::before {
    width: 66px;
    height: 66px;
  }
}

html {
  scroll-behavior: smooth;
}

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--secondary-color);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

.blur-on-scroll {
  transition: filter 0.3s ease, transform 0.3s ease, opacity 0.3s ease;
}

.blur-on-scroll.blurred {
  filter: blur(8px);
  transform: scale(0.95);
  opacity: 0.7;
}

.product-card.blur-effect,
.feature-card.blur-effect {
  filter: blur(3px);
  transform: scale(0.97);
  opacity: 0.85;
}

.product-card.apple-blur,
.feature-card.apple-blur {
  filter: blur(4px) saturate(0.8);
  transform: scale(0.98);
  opacity: 0.7;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.product-card:not(.apple-blur),
.feature-card:not(.apple-blur) {
  filter: blur(0px) saturate(1);
  transform: scale(1);
  opacity: 1;
}