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

:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --primary-light: #e8f0fe;
  --accent: #00c853;
  --text-primary: #1a1a2e;
  --text-secondary: #5f6368;
  --text-light: #80868b;
  --bg-white: #ffffff;
  --bg-light: #f8f9fa;
  --bg-dark: #1a1a2e;
  --border: #e0e0e0;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.16);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Helvetica Neue", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== Navigation ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: all var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary);
}

.nav-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), #4facfe);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 800;
}

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

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
  transition: width var(--transition);
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  background: var(--primary);
  color: #fff !important;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition);
}

.nav-download-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(26, 115, 232, 0.4);
}

.nav-download-btn::after {
  display: none !important;
}

/* Mobile menu */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ========== Hero Section ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
  background: linear-gradient(160deg, #f0f6ff 0%, #ffffff 40%, #f5f0ff 100%);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(26, 115, 232, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 200, 83, 0.06) 0%, transparent 70%);
  border-radius: 50%;
}

.hero .container {
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 1;
}

.hero-content {
  flex: 1;
  max-width: 560px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.5); }
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--primary), #4facfe);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(26, 115, 232, 0.3);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(26, 115, 232, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border);
}

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

.btn svg {
  width: 20px;
  height: 20px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.hero-stat .stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
}

.hero-stat .stat-label {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 4px;
}

/* Hero visual */
.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.phone-mockup {
  position: relative;
  width: 280px;
  height: 560px;
  background: linear-gradient(160deg, #1a1a2e, #2d2d44);
  border-radius: 40px;
  padding: 12px;
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255,255,255,0.1) inset;
  transform: perspective(1000px) rotateY(-8deg) rotateX(4deg);
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.phone-mockup:hover {
  transform: perspective(1000px) rotateY(-2deg) rotateX(1deg);
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, #e8f0fe 0%, #ffffff 30%, #f8f9fa 100%);
  border-radius: 30px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 20px 20px;
}

.phone-screen .app-logo {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary), #4facfe);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.phone-screen .app-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.phone-screen .app-desc {
  font-size: 0.75rem;
  color: var(--text-light);
  margin-bottom: 24px;
}

.phone-screen .app-cards {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.phone-screen .app-card {
  background: #fff;
  border-radius: 12px;
  padding: 14px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  display: flex;
  align-items: center;
  gap: 12px;
}

.phone-screen .app-card .card-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.phone-screen .app-card .card-text h4 {
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.phone-screen .app-card .card-text p {
  font-size: 0.65rem;
  color: var(--text-light);
}

.floating-card {
  position: absolute;
  background: #fff;
  border-radius: var(--radius-md);
  padding: 14px 18px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: float 6s ease-in-out infinite;
}

.floating-card.card-1 {
  top: 60px;
  right: -30px;
  animation-delay: 0s;
}

.floating-card.card-2 {
  bottom: 80px;
  left: -40px;
  animation-delay: 2s;
}

.floating-card .fc-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.floating-card .fc-text {
  font-size: 0.8rem;
  font-weight: 600;
}

.floating-card .fc-sub {
  font-size: 0.7rem;
  color: var(--text-light);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ========== Section Common ========== */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== About Section ========== */
.about {
  background: var(--bg-light);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--primary-light), #f0e6ff);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-image .about-visual {
  width: 80%;
  height: 70%;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 24px;
}

.about-visual .av-logo {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--primary), #4facfe);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.8rem;
  font-weight: 800;
}

.about-visual .av-name {
  font-size: 1.4rem;
  font-weight: 700;
}

.about-visual .av-slogan {
  font-size: 0.9rem;
  color: var(--text-light);
}

.about-content h3 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
}

.about-content p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
  font-size: 1rem;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 28px;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: #fff;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.about-feature .af-icon {
  width: 32px;
  height: 32px;
  background: var(--primary-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 0.9rem;
  flex-shrink: 0;
}

.about-feature span {
  font-size: 0.9rem;
  font-weight: 600;
}

/* ========== Features Section ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), #4facfe);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== Product Section ========== */
.product {
  background: var(--bg-light);
}

.product-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.product-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.product-item {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: #fff;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: all var(--transition);
  cursor: pointer;
}

.product-item:hover,
.product-item.active {
  border-color: var(--primary);
  box-shadow: 0 4px 16px rgba(26, 115, 232, 0.12);
}

.product-item .pi-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.product-item .pi-content h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.product-item .pi-content p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.product-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.product-screen {
  width: 300px;
  height: 520px;
  background: linear-gradient(160deg, #1a1a2e, #2d2d44);
  border-radius: 36px;
  padding: 10px;
  box-shadow: var(--shadow-lg);
}

.product-screen-inner {
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, #fff 0%, #f8f9fa 100%);
  border-radius: 28px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 20px 16px;
}

.ps-header {
  text-align: center;
  margin-bottom: 20px;
}

.ps-header h4 {
  font-size: 1rem;
  font-weight: 700;
}

.ps-header p {
  font-size: 0.75rem;
  color: var(--text-light);
}

.ps-search {
  background: var(--bg-light);
  border-radius: 10px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 0.8rem;
  color: var(--text-light);
}

.ps-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  flex: 1;
}

.ps-grid-item {
  background: #fff;
  border-radius: 10px;
  padding: 12px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.ps-grid-item .psi-icon {
  font-size: 1.5rem;
}

.ps-grid-item .psi-name {
  font-size: 0.7rem;
  font-weight: 600;
  text-align: center;
}

.ps-grid-item .psi-price {
  font-size: 0.65rem;
  color: var(--primary);
  font-weight: 600;
}

/* ========== Testimonials ========== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

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

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.testimonial-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  color: #fbbc04;
  font-size: 0.9rem;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
}

.testimonial-info .ta-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.testimonial-info .ta-role {
  font-size: 0.78rem;
  color: var(--text-light);
}

/* ========== Download CTA ========== */
.download-cta {
  background: linear-gradient(135deg, var(--bg-dark) 0%, #2d2d5e 100%);
  color: #fff;
  text-align: center;
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.download-cta::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(26, 115, 232, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(79, 172, 254, 0.1) 0%, transparent 50%);
}

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

.download-cta .section-title {
  color: #fff;
}

.download-cta .section-desc {
  color: rgba(255, 255, 255, 0.7);
}

.download-actions {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: #fff;
  transition: all var(--transition);
  backdrop-filter: blur(10px);
}

.store-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.store-btn .store-icon {
  font-size: 1.8rem;
}

.store-btn .store-text {
  text-align: left;
}

.store-btn .store-text .st-small {
  font-size: 0.7rem;
  opacity: 0.8;
}

.store-btn .store-text .st-large {
  font-size: 1.05rem;
  font-weight: 700;
}

/* ========== Contact Section ========== */
.contact {
  background: var(--bg-light);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.contact-info > p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-item .ci-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-item .ci-text .ci-label {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 2px;
}

.contact-item .ci-text .ci-value {
  font-size: 1rem;
  font-weight: 600;
}

.contact-form {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  transition: all var(--transition);
  outline: none;
  background: var(--bg-light);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.btn-submit {
  width: 100%;
  padding: 14px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.btn-submit:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(26, 115, 232, 0.3);
}

/* ========== Footer ========== */
.footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand .footer-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), #4facfe);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1rem;
  font-weight: 800;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.85rem;
  transition: all var(--transition);
}

.footer-social a:hover {
  background: var(--primary);
  color: #fff;
}

.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition);
}

.footer-col ul li a:hover {
  color: #fff;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom-links a:hover {
  color: rgba(255, 255, 255, 0.8);
}

/* ========== Scroll Animations ========== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero .container {
    flex-direction: column;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    margin-top: 20px;
  }

  .about-grid,
  .product-showcase,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    box-shadow: var(--shadow-md);
  }

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

  .nav-toggle {
    display: flex;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .section {
    padding: 60px 0;
  }

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

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

  .phone-mockup {
    width: 220px;
    height: 440px;
  }

  .floating-card {
    display: none;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .hero-stats {
    gap: 24px;
  }

  .download-actions {
    flex-direction: column;
    align-items: center;
  }

  .product-screen {
    width: 240px;
    height: 420px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-title {
    font-size: 1.8rem;
  }

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

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }
}