/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  cursor: pointer;
  line-height: 1;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--bg-white);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--bg-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--bg-white);
  color: var(--color-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  background: var(--bg-subtle);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
}
.btn-ghost:hover {
  background: var(--bg-subtle);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn-on-dark {
  background: white;
  color: var(--color-primary);
}
.btn-on-dark:hover {
  background: var(--bg-subtle);
}

/* ============================================
   Cards
   ============================================ */
.card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: all var(--transition-base);
}
.card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

.card-hover {
  cursor: pointer;
}
.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.card-title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}
.card-title--sm {
  font-size: var(--text-base);
}

.card-text {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}
.card-icon svg {
  width: 24px;
  height: 24px;
  stroke: white;
  fill: none;
  stroke-width: 2;
}

/* ============================================
   Badge
   ============================================ */
.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  background: rgba(2, 132, 199, 0.1);
  color: var(--color-primary);
}
.badge--error {
  background: var(--color-error-light);
  color: var(--color-error);
}

/* ============================================
   Grid Layouts
   ============================================ */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ============================================
   Section Headers
   ============================================ */
.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header .badge {
  margin-bottom: var(--space-4);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  max-width: 600px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: var(--text-base);
}

/* ============================================
   Navbar
   ============================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  height: var(--header-height);
}

.navbar-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  font-size: var(--text-base);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.navbar-brand .logo-mark {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 14px;
  font-weight: 800;
}

.navbar-brand .logo-img {
  height: 36px;
  width: auto;
  max-width: 64px;
  object-fit: contain;
  display: block;
  mix-blend-mode: multiply;
}

.product-image {
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
  display: block;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px -10px rgba(2, 132, 199, 0.25);
}

.navbar-menu {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-2) 0;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  transition: color var(--transition-fast);
}
.nav-link:hover { color: var(--color-primary); }
.nav-link.active { color: var(--color-primary); }

.nav-link .chevron {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-base);
}

.nav-item.has-dropdown:hover .chevron {
  transform: rotate(180deg);
}

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 220px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.nav-item.has-dropdown:hover .nav-dropdown,
.nav-item.has-dropdown:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown a {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.nav-dropdown a:hover {
  background: var(--bg-subtle);
  color: var(--color-primary);
}

/* Hamburger */
.navbar-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
}

.navbar-toggle span {
  display: block;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.navbar-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.navbar-toggle.active span:nth-child(2) {
  opacity: 0;
}
.navbar-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu */
.navbar-mobile {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background: var(--bg-white);
  padding: var(--space-6);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  z-index: 99;
}
.navbar-mobile.active { transform: translateX(0); }

.navbar-mobile .nav-link {
  display: flex;
  justify-content: space-between;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--border);
  font-size: var(--text-base);
}

.navbar-mobile .mobile-submenu {
  display: none;
  padding-left: var(--space-4);
}
.navbar-mobile .mobile-submenu.active { display: block; }

.navbar-mobile .mobile-submenu a {
  display: block;
  padding: var(--space-3) 0;
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

@media (min-width: 768px) {
  .navbar-menu { display: flex; }
  .navbar-toggle { display: none; }
  .navbar-mobile { display: none; }
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-24);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

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

.footer-brand h4 { margin-bottom: var(--space-3); }
.footer-brand p { color: var(--text-secondary); font-size: var(--text-xs); }

.footer-col h5 {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-4);
  font-weight: 700;
}

.footer-col ul li {
  margin-bottom: var(--space-3);
}

.footer-col a {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}
.footer-col a:hover { color: var(--color-primary); }

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
  text-align: center;
  font-size: var(--text-xs);
  color: var(--text-muted);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ============================================
   Stat Counter
   ============================================ */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
  text-align: center;
}
@media (min-width: 768px) {
  .stat-grid { grid-template-columns: repeat(4, 1fr); }
}

.stat {
  padding: var(--space-4);
}

.stat-value {
  font-size: var(--text-2xl);
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-flex;
  align-items: baseline;
}

.stat-suffix {
  font-size: var(--text-lg);
  margin-left: 2px;
  -webkit-text-fill-color: var(--color-primary);
}

.stat-label {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

/* ============================================
   Hero with DataFlow Animation
   ============================================ */
.hero {
  position: relative;
  padding: var(--space-24) 0 var(--space-16);
  background: linear-gradient(135deg, #dbeafe 0%, #e0f2fe 25%, #f0f9ff 50%, #dbeafe 75%, #e0f2fe 100%);
  background-size: 300% 300%;
  animation: gradientShift 12s ease-in-out infinite;
  overflow: hidden;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: center;
}

@media (min-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr 1fr; }
}

.hero-content .badge { margin-bottom: var(--space-4); }

.hero-content h1 {
  margin-bottom: var(--space-6);
  font-weight: 800;
  max-width: 540px;
}

.hero-content .lead {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  line-height: 1.6;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Hero RIS Image Stack (tilted, standing cards) */
.hero-ris-stack {
  position: relative;
  width: 100%;
  min-height: 380px;
  perspective: 1400px;
  transform-style: preserve-3d;
}

.hero-ris-stack .ris-card {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 260px;
  height: auto;
  border-radius: 14px;
  box-shadow:
    0 24px 48px rgba(2, 132, 199, 0.25),
    0 8px 16px rgba(15, 23, 42, 0.12);
  background: white;
  border: 1px solid rgba(255, 255, 255, 0.6);
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.5s ease;
  will-change: transform;
}

.hero-ris-stack .ris-card-1 {
  transform: translate(-50%, -50%) translateX(-130px) translateY(-10px) rotateY(18deg) rotateZ(-6deg);
  z-index: 1;
}

.hero-ris-stack .ris-card-2 {
  transform: translate(-50%, -50%) translateY(-20px) rotateY(0deg) rotateZ(-2deg);
  z-index: 3;
  box-shadow:
    0 32px 64px rgba(2, 132, 199, 0.3),
    0 12px 20px rgba(15, 23, 42, 0.15);
}

.hero-ris-stack .ris-card-3 {
  transform: translate(-50%, -50%) translateX(130px) translateY(-10px) rotateY(-18deg) rotateZ(6deg);
  z-index: 2;
}

.hero-ris-stack:hover .ris-card-1 {
  transform: translate(-50%, -50%) translateX(-160px) translateY(-14px) rotateY(14deg) rotateZ(-8deg);
}

.hero-ris-stack:hover .ris-card-2 {
  transform: translate(-50%, -50%) translateY(-28px) rotateY(0deg) rotateZ(0deg);
}

.hero-ris-stack:hover .ris-card-3 {
  transform: translate(-50%, -50%) translateX(160px) translateY(-14px) rotateY(-14deg) rotateZ(8deg);
}

@media (max-width: 768px) {
  .hero-ris-stack {
    min-height: 300px;
  }
  .hero-ris-stack .ris-card {
    width: 200px;
    border-radius: 10px;
  }
  .hero-ris-stack .ris-card-1 {
    transform: translate(-50%, -50%) translateX(-90px) translateY(-8px) rotateY(16deg) rotateZ(-5deg);
  }
  .hero-ris-stack .ris-card-3 {
    transform: translate(-50%, -50%) translateX(90px) translateY(-8px) rotateY(-16deg) rotateZ(5deg);
  }
}

/* Hero DIS Image Stack (landscape tilted cards) */
.hero-dis-stack {
  position: relative;
  width: 100%;
  min-height: 340px;
  perspective: 1400px;
  transform-style: preserve-3d;
}

.hero-dis-stack .dis-card {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 340px;
  height: auto;
  border-radius: 10px;
  box-shadow:
    0 24px 48px rgba(2, 132, 199, 0.25),
    0 8px 16px rgba(15, 23, 42, 0.12);
  background: white;
  border: 1px solid rgba(255, 255, 255, 0.6);
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.5s ease;
  will-change: transform;
}

.hero-dis-stack .dis-card-1 {
  transform: translate(-50%, -50%) translateX(-80px) translateY(-40px) rotateY(14deg) rotateZ(-5deg);
  z-index: 1;
}

.hero-dis-stack .dis-card-2 {
  transform: translate(-50%, -50%) translateY(0) rotateY(0deg) rotateZ(-1deg);
  z-index: 3;
  box-shadow:
    0 32px 64px rgba(2, 132, 199, 0.3),
    0 12px 20px rgba(15, 23, 42, 0.15);
}

.hero-dis-stack .dis-card-3 {
  transform: translate(-50%, -50%) translateX(80px) translateY(40px) rotateY(-14deg) rotateZ(5deg);
  z-index: 2;
}

.hero-dis-stack:hover .dis-card-1 {
  transform: translate(-50%, -50%) translateX(-110px) translateY(-50px) rotateY(10deg) rotateZ(-7deg);
}

.hero-dis-stack:hover .dis-card-2 {
  transform: translate(-50%, -50%) translateY(-8px) rotateY(0deg) rotateZ(0deg);
}

.hero-dis-stack:hover .dis-card-3 {
  transform: translate(-50%, -50%) translateX(110px) translateY(50px) rotateY(-10deg) rotateZ(7deg);
}

@media (max-width: 768px) {
  .hero-dis-stack {
    min-height: 260px;
  }
  .hero-dis-stack .dis-card {
    width: 260px;
  }
  .hero-dis-stack .dis-card-1 {
    transform: translate(-50%, -50%) translateX(-50px) translateY(-30px) rotateY(12deg) rotateZ(-4deg);
  }
  .hero-dis-stack .dis-card-3 {
    transform: translate(-50%, -50%) translateX(50px) translateY(30px) rotateY(-12deg) rotateZ(4deg);
  }
}

/* Hero Vital Image Fan (portrait playing-card spread) */
.hero-vital-fan {
  position: relative;
  width: 100%;
  min-height: 420px;
  perspective: 1400px;
}

.hero-vital-fan .vital-card {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 180px;
  height: auto;
  border-radius: 10px;
  box-shadow:
    0 20px 40px rgba(2, 132, 199, 0.22),
    0 6px 14px rgba(15, 23, 42, 0.1);
  background: white;
  border: 1px solid rgba(255, 255, 255, 0.6);
  transform-origin: bottom center;
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.5s ease;
  will-change: transform;
}

.hero-vital-fan .vital-card-1 {
  transform: translate(-50%, -50%) translateX(-165px) translateY(16px) rotateZ(-14deg);
  z-index: 1;
}
.hero-vital-fan .vital-card-2 {
  transform: translate(-50%, -50%) translateX(-55px) translateY(-4px) rotateZ(-5deg);
  z-index: 2;
}
.hero-vital-fan .vital-card-3 {
  transform: translate(-50%, -50%) translateX(55px) translateY(-4px) rotateZ(5deg);
  z-index: 3;
}
.hero-vital-fan .vital-card-4 {
  transform: translate(-50%, -50%) translateX(165px) translateY(16px) rotateZ(14deg);
  z-index: 4;
}

.hero-vital-fan:hover .vital-card-1 {
  transform: translate(-50%, -50%) translateX(-205px) translateY(22px) rotateZ(-18deg);
}
.hero-vital-fan:hover .vital-card-2 {
  transform: translate(-50%, -50%) translateX(-72px) translateY(-10px) rotateZ(-7deg);
}
.hero-vital-fan:hover .vital-card-3 {
  transform: translate(-50%, -50%) translateX(72px) translateY(-10px) rotateZ(7deg);
}
.hero-vital-fan:hover .vital-card-4 {
  transform: translate(-50%, -50%) translateX(205px) translateY(22px) rotateZ(18deg);
}

@media (max-width: 768px) {
  .hero-vital-fan {
    min-height: 320px;
  }
  .hero-vital-fan .vital-card {
    width: 130px;
  }
  .hero-vital-fan .vital-card-1 {
    transform: translate(-50%, -50%) translateX(-110px) translateY(12px) rotateZ(-14deg);
  }
  .hero-vital-fan .vital-card-2 {
    transform: translate(-50%, -50%) translateX(-38px) translateY(-2px) rotateZ(-5deg);
  }
  .hero-vital-fan .vital-card-3 {
    transform: translate(-50%, -50%) translateX(38px) translateY(-2px) rotateZ(5deg);
  }
  .hero-vital-fan .vital-card-4 {
    transform: translate(-50%, -50%) translateX(110px) translateY(12px) rotateZ(14deg);
  }
}

/* DIS Screenshot Gallery */
.dis-gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 480px) {
  .dis-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .dis-gallery {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .dis-gallery {
    grid-template-columns: repeat(4, 1fr);
  }
}

.dis-gallery-item {
  margin: 0;
  overflow: hidden;
  border-radius: 10px;
  background: white;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
  border: 1px solid rgba(15, 23, 42, 0.06);
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.3s ease;
}

.dis-gallery-item img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 0.4s ease;
}

.dis-gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(2, 132, 199, 0.18);
}

.dis-gallery-item:hover img {
  transform: scale(1.03);
}

/* Data Flow SVG */
.dataflow {
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  filter: drop-shadow(0 20px 40px rgba(2, 132, 199, 0.15));
}

.dataflow .node-rect {
  fill: white;
  stroke: var(--color-primary);
  stroke-width: 2;
}

.dataflow .node-rect-active {
  fill: var(--color-primary);
  stroke: var(--color-primary-dark);
  stroke-width: 2;
}

.dataflow .node-label {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  fill: var(--text-primary);
}

.dataflow .node-label-active {
  fill: white;
}

.dataflow .flow-line {
  stroke: var(--color-primary-light);
  stroke-width: 2;
  stroke-dasharray: 6 4;
  fill: none;
  animation: flowDash 1.2s linear infinite;
}

@keyframes flowDash {
  to { stroke-dashoffset: -20; }
}

.dataflow .pulse-dot {
  fill: var(--color-primary);
  animation: pulseOpacity 1.5s ease-in-out infinite;
}

@keyframes pulseOpacity {
  0%, 100% { opacity: 0.3; r: 4; }
  50% { opacity: 1; r: 6; }
}

/* ============================================
   Page Loader
   ============================================ */
.page-loader {
  position: fixed;
  inset: 0;
  background: var(--bg-white);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 300ms ease-out;
}

.page-loader.fade-out {
  opacity: 0;
  pointer-events: none;
}

.page-loader-logo {
  width: 120px;
  height: 120px;
}

.page-loader-logo text {
  font-family: var(--font-sans);
  font-size: 72px;
  font-weight: 800;
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 2;
  stroke-dasharray: 200;
  stroke-dashoffset: 200;
  animation: drawLogo 800ms ease-out forwards;
}

@keyframes drawLogo {
  to {
    stroke-dashoffset: 0;
    fill: var(--color-primary);
  }
}

/* ============================================
   導入實績 - 醫院客戶 chip
   ============================================ */
.client-group {
  margin-bottom: var(--space-6);
}
.client-group:last-child {
  margin-bottom: 0;
}
.client-group-title {
  font-size: var(--text-base);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.client-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.client-chip {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  background: rgba(2, 132, 199, 0.06);
  border: 1px solid rgba(2, 132, 199, 0.18);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
}