/* ============================================================
   Landing Page 0019 - Amber/Warm Theme (温暖信任风)
   Custom Styles
   ============================================================ */

/* ----------------------------------------------------------
   CSS Variables / Design Tokens
   ---------------------------------------------------------- */
:root {
  --amber-50: #fffbeb;
  --amber-100: #fef3c7;
  --amber-200: #fde68a;
  --amber-300: #fcd34d;
  --amber-400: #fbbf24;
  --amber-500: #f59e0b;
  --amber-600: #d97706;
  --amber-700: #b45309;
  --orange-500: #f97316;
  --orange-600: #ea580c;
  --yellow-500: #eab308;
  --red-500: #ef4444;
  --rose-500: #f43f5e;
  --pink-500: #ec4899;
  --warm-shadow-light: 0 4px 6px -1px rgba(245, 158, 11, 0.15), 0 2px 4px -2px rgba(245, 158, 11, 0.1);
  --warm-shadow-md: 0 10px 15px -3px rgba(245, 158, 11, 0.2), 0 4px 6px -4px rgba(245, 158, 11, 0.1);
  --warm-shadow-lg: 0 20px 25px -5px rgba(245, 158, 11, 0.25), 0 8px 10px -6px rgba(245, 158, 11, 0.15);
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ----------------------------------------------------------
   Global Reset & Base Styles
   ---------------------------------------------------------- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  color: #1f2937;
  background-color: #ffffff;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Selection color */
::selection {
  background-color: var(--amber-200);
  color: var(--amber-900);
}

::-moz-selection {
  background-color: var(--amber-200);
  color: var(--amber-900);
}

/* ----------------------------------------------------------
   Custom Scrollbar (Thin, Amber)
   ---------------------------------------------------------- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--amber-50);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--amber-400), var(--amber-500));
  border-radius: 10px;
  border: 2px solid var(--amber-50);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--amber-500), var(--amber-600));
}

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--amber-400) var(--amber-50);
}

/* ----------------------------------------------------------
   Navbar Styles
   ---------------------------------------------------------- */
.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--amber-100);
  transition: box-shadow var(--transition-smooth);
  z-index: 1000;
  position: sticky;
  top: 0;
}

.navbar.scrolled {
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.12);
  border-bottom-color: transparent;
}

/* Nav link amber underline animation */
.nav-link {
  position: relative;
  display: inline-block;
  padding-bottom: 4px;
  color: #4b5563;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-smooth);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--amber-400), var(--amber-500));
  border-radius: 2px;
  transition: width var(--transition-smooth);
}

.nav-link:hover {
  color: var(--amber-600);
}

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

.nav-link.active {
  color: var(--amber-600);
}

.nav-link.active::after {
  width: 100%;
}

/* Mobile menu */
.mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth), padding var(--transition-smooth);
}

.mobile-menu.open {
  max-height: 400px;
}

.mobile-menu .nav-link {
  display: block;
  padding: 12px 16px;
  border-bottom: 1px solid var(--amber-50);
}

/* ----------------------------------------------------------
   Hero Section
   ---------------------------------------------------------- */
.hero-image {
  box-shadow: 0 20px 60px -15px rgba(245, 158, 11, 0.35),
              0 8px 20px -10px rgba(245, 158, 11, 0.2);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.hero-image:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 30px 80px -20px rgba(245, 158, 11, 0.4),
              0 12px 30px -12px rgba(245, 158, 11, 0.25);
}

/* Amber gradient text */
.text-gradient-amber {
  background: linear-gradient(135deg, var(--amber-500), var(--orange-500), var(--amber-400));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* CTA button pulse animation */
.btn-cta-pulse {
  animation: ctaPulse 2s ease-in-out infinite;
}

@keyframes ctaPulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.5);
  }
  50% {
    box-shadow: 0 0 0 15px rgba(245, 158, 11, 0);
  }
}

/* ----------------------------------------------------------
   Feature Cards
   ---------------------------------------------------------- */
.feature-card {
  background: #ffffff;
  border: 2px solid var(--amber-100);
  border-radius: 0.75rem;
  padding: 1.5rem;
  transition: all var(--transition-smooth);
  cursor: default;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--amber-400), transparent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-smooth);
}

.feature-card:hover {
  border-color: var(--amber-400);
  transform: translateY(-4px);
  box-shadow: var(--warm-shadow-md);
}

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

.feature-icon-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #ffffff;
  transition: transform var(--transition-bounce);
}

.feature-card:hover .feature-icon-circle {
  transform: scale(1.1) rotate(-5deg);
}

/* ----------------------------------------------------------
   Stats Bar Chart
   ---------------------------------------------------------- */
.stat-row {
  margin-bottom: 1.25rem;
}

.stat-bar-bg {
  background-color: var(--amber-100);
  border-radius: 9999px;
  height: 32px;
  overflow: hidden;
  position: relative;
}

.stat-bar-fill {
  background: linear-gradient(90deg, var(--amber-400), var(--amber-500), var(--orange-500));
  border-radius: 9999px;
  height: 100%;
  width: 0%;
  transition: width 1.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
}

.stat-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.3) 50%,
    transparent 100%
  );
  border-radius: 9999px;
  animation: barShimmer 2s ease-in-out infinite;
}

@keyframes barShimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.stat-bar-fill.animated {
  /* Width set inline via JS */;
}

/* ----------------------------------------------------------
   Testimonials - Masonry Grid
   ---------------------------------------------------------- */
.testimonial-masonry {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: auto;
  gap: 1.5rem;
}

.testimonial-masonry > * {
  break-inside: avoid;
}

.testimonial-card {
  background: #ffffff;
  border: 1px solid var(--amber-100);
  border-radius: 0.75rem;
  padding: 1.5rem;
  transition: all var(--transition-smooth);
  position: relative;
}

.testimonial-card:hover {
  border-color: var(--amber-400);
  box-shadow: var(--warm-shadow-md);
  transform: translateY(-2px);
}

.testimonial-card::before {
  content: '\201C';
  position: absolute;
  top: 8px;
  right: 16px;
  font-size: 4rem;
  color: var(--amber-100);
  line-height: 1;
  font-family: Georgia, serif;
  pointer-events: none;
}

.testimonial-card.tall {
  grid-row: span 2;
}

.testimonial-card.short {
  grid-row: span 1;
}

.testimonial-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--amber-200);
  transition: border-color var(--transition-smooth);
}

.testimonial-card:hover .testimonial-avatar {
  border-color: var(--amber-400);
}

.star-rating {
  color: var(--amber-400);
  letter-spacing: 2px;
}

/* ----------------------------------------------------------
   FAQ Numbered List
   ---------------------------------------------------------- */
.faq-number {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--amber-600);
  min-width: 48px;
  flex-shrink: 0;
  opacity: 0.3;
  transition: opacity var(--transition-smooth);
}

.faq-item {
  border-bottom: 1px solid var(--amber-100);
  padding: 1.5rem 0;
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  transition: background-color var(--transition-smooth);
}

.faq-item:hover {
  background-color: var(--amber-50);
  border-radius: 0.5rem;
  padding-left: 0.75rem;
  padding-right: 0.75rem;
}

.faq-item:hover .faq-number {
  opacity: 1;
}

.faq-item:last-child {
  border-bottom: none;
}

/* ----------------------------------------------------------
   CTA Banner
   ---------------------------------------------------------- */
.cta-banner {
  background: linear-gradient(135deg, var(--amber-400), var(--orange-500), var(--amber-500));
  border-radius: 1rem;
  padding: 3rem 2rem;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle at 30% 50%,
    rgba(255, 255, 255, 0.15) 0%,
    transparent 50%
  );
  animation: ctaGlow 6s ease-in-out infinite;
}

@keyframes ctaGlow {
  0%, 100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(5%, -5%);
  }
}

.cta-banner > * {
  position: relative;
  z-index: 1;
}

/* ----------------------------------------------------------
   Footer
   ---------------------------------------------------------- */
.footer-link {
  color: #6b7280;
  text-decoration: none;
  transition: color var(--transition-smooth), padding-left var(--transition-smooth);
  display: inline-block;
}

.footer-link:hover {
  color: var(--amber-600);
  padding-left: 4px;
}

.footer-social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--amber-100);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--amber-600);
  font-size: 1.1rem;
  transition: all var(--transition-smooth);
  text-decoration: none;
}

.footer-social-icon:hover {
  background-color: var(--amber-500);
  color: #ffffff;
  transform: translateY(-3px);
  box-shadow: var(--warm-shadow-md);
}

/* ----------------------------------------------------------
   Warm Shadow Utilities
   ---------------------------------------------------------- */
.shadow-warm-sm {
  box-shadow: 0 2px 4px rgba(245, 158, 11, 0.1);
}

.shadow-warm {
  box-shadow: var(--warm-shadow-light);
}

.shadow-warm-md {
  box-shadow: var(--warm-shadow-md);
}

.shadow-warm-lg {
  box-shadow: var(--warm-shadow-lg);
}

.shadow-warm-xl {
  box-shadow: 0 25px 50px -12px rgba(245, 158, 11, 0.3);
}

/* ----------------------------------------------------------
   Animations & Keyframes
   ---------------------------------------------------------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes countUp {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-on-scroll {
  opacity: 0;
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
}

.fade-in-up {
  transform: translateY(30px);
}

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

.fade-in-left {
  transform: translateX(-30px);
}

.fade-in-left.visible {
  transform: translateX(0);
}

.fade-in-right {
  transform: translateX(30px);
}

.fade-in-right.visible {
  transform: translateX(0);
}

.scale-in {
  transform: scale(0.9);
}

.scale-in.visible {
  transform: scale(1);
}

/* ----------------------------------------------------------
   About Page Styles
   ---------------------------------------------------------- */
.about-mission-card {
  background: #ffffff;
  border: 2px solid var(--amber-100);
  border-radius: 0.75rem;
  padding: 2rem 1.5rem;
  text-align: center;
  transition: all var(--transition-smooth);
}

.about-mission-card:hover {
  border-color: var(--amber-400);
  box-shadow: var(--warm-shadow-md);
  transform: translateY(-6px);
}

.about-mission-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--amber-100), var(--amber-50));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.75rem;
  color: var(--amber-600);
  transition: all var(--transition-bounce);
}

.about-mission-card:hover .about-mission-icon {
  background: linear-gradient(135deg, var(--amber-400), var(--amber-500));
  color: #ffffff;
  transform: scale(1.1) rotate(5deg);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--amber-400), var(--amber-300), var(--amber-100));
  border-radius: 3px;
}

.timeline-item {
  position: relative;
  padding-bottom: 1.75rem;
  padding-left: 1.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--amber-500);
  border: 3px solid #ffffff;
  box-shadow: 0 0 0 3px var(--amber-200);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

/* Team Cards */
.team-card {
  background: #ffffff;
  border: 2px solid var(--amber-100);
  border-radius: 0.75rem;
  padding: 1.5rem;
  text-align: center;
  transition: all var(--transition-smooth);
}

.team-card:hover {
  border-color: var(--amber-400);
  box-shadow: var(--warm-shadow-md);
  transform: translateY(-6px);
}

.team-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--amber-200);
  margin: 0 auto 1rem;
  transition: border-color var(--transition-smooth);
}

.team-card:hover .team-avatar {
  border-color: var(--amber-500);
}

/* ----------------------------------------------------------
   Download Page Styles
   ---------------------------------------------------------- */
.download-card {
  background: #ffffff;
  border: 2px solid var(--amber-100);
  border-radius: 0.75rem;
  padding: 2rem;
  text-align: center;
  transition: all var(--transition-smooth);
  cursor: pointer;
}

.download-card:hover {
  border-color: var(--amber-400);
  box-shadow: var(--warm-shadow-lg);
  transform: translateY(-4px);
}

.download-card-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--amber-50), var(--amber-100));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 2.25rem;
  color: var(--amber-600);
  transition: all var(--transition-bounce);
}

.download-card:hover .download-card-icon {
  background: linear-gradient(135deg, var(--amber-400), var(--amber-500));
  color: #ffffff;
  transform: scale(1.1);
}

.qr-placeholder {
  width: 180px;
  height: 180px;
  background-color: var(--amber-50);
  border: 3px dashed var(--amber-300);
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  color: var(--amber-400);
  font-size: 1rem;
  text-align: center;
  transition: all var(--transition-smooth);
}

.qr-placeholder:hover {
  border-color: var(--amber-500);
  background-color: var(--amber-100);
}

.install-step {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem 0;
  border-bottom: 1px solid var(--amber-100);
}

.install-step:last-child {
  border-bottom: none;
}

.install-step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--amber-400), var(--amber-500));
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

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

.hamburger span {
  display: block;
  width: 24px;
  height: 2.5px;
  background-color: #374151;
  border-radius: 2px;
  transition: all var(--transition-smooth);
  transform-origin: center;
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.open span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ----------------------------------------------------------
   System Requirements Table
   ---------------------------------------------------------- */
.requirements-table {
  width: 100%;
  border-collapse: collapse;
}

.requirements-table th,
.requirements-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--amber-100);
}

.requirements-table th {
  background-color: var(--amber-50);
  color: var(--amber-800);
  font-weight: 600;
}

.requirements-table tr:hover td {
  background-color: var(--amber-50);
}

/* ----------------------------------------------------------
   Responsive - 375px to 1280px
   ---------------------------------------------------------- */

/* Mobile: 375px - 639px */
@media (max-width: 639px) {
  .hamburger {
    display: flex;
  }

  .desktop-nav {
    display: none;
  }

  .hero-section {
    flex-direction: column-reverse;
    text-align: center;
  }

  .hero-image {
    max-width: 300px;
    margin: 0 auto 2rem;
  }

  .testimonial-masonry {
    grid-template-columns: 1fr;
  }

  .testimonial-card.tall {
    grid-row: span 1;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }

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

  .stat-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .stat-row .stat-label {
    width: 100%;
  }

  .stat-row .stat-value {
    width: 100%;
    text-align: left;
  }

  .timeline {
    padding-left: 1.5rem;
  }

  .timeline-item::before {
    left: -1.5rem;
  }

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

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

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

  .faq-number {
    font-size: 1.75rem;
    min-width: 36px;
  }

  .faq-item {
    padding: 1rem 0;
  }

  .cta-banner {
    padding: 2rem 1.25rem;
  }

  .hero-heading {
    font-size: 1.75rem;
    line-height: 1.3;
  }

  .section-title {
    font-size: 1.5rem;
  }
}

/* Tablet: 640px - 1023px */
@media (min-width: 640px) and (max-width: 1023px) {
  .testimonial-masonry {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .hero-section {
    flex-direction: column-reverse;
    text-align: center;
  }

  .hero-image {
    max-width: 400px;
    margin: 0 auto 2rem;
  }

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

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

/* Desktop: 1024px+ */
@media (min-width: 1024px) {
  .hamburger {
    display: none;
  }

  .desktop-nav {
    display: flex;
  }

  .mobile-menu {
    display: none;
  }

  .hero-section {
    flex-direction: row;
  }

  .testimonial-masonry {
    grid-template-columns: repeat(3, 1fr);
  }

  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .hero-heading {
    font-size: 2.75rem;
    line-height: 1.2;
  }

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

/* Extra small: below 375px */
@media (max-width: 374px) {
  .hero-heading {
    font-size: 1.5rem;
  }

  .section-title {
    font-size: 1.25rem;
  }

  .cta-banner {
    padding: 1.5rem 1rem;
  }

  .navbar {
    padding-left: 0.5rem;
    padding-right: 0.5rem;
  }
}

/* ----------------------------------------------------------
   Print Styles
   ---------------------------------------------------------- */
@media print {
  .navbar,
  .footer,
  .cta-banner,
  .hamburger {
    display: none;
  }
}

/* ----------------------------------------------------------
   Accessibility: Reduced Motion
   ---------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}