/* ============================================
   朗心人因科技官网 - 主样式表
   ============================================ */

/* CSS Variables */
:root {
  /* Colors */
  --color-primary: #0891b2;
  --color-primary-dark: #0e7490;
  --color-primary-light: #22d3ee;
  --color-secondary: #8b5cf6;
  --color-secondary-light: #a78bfa;
  
  --color-slate-900: #0f172a;
  --color-slate-800: #1e293b;
  --color-slate-700: #334155;
  --color-slate-600: #475569;
  --color-slate-500: #64748b;
  --color-slate-400: #94a3b8;
  --color-slate-300: #cbd5e1;
  --color-slate-200: #e2e8f0;
  --color-slate-100: #f1f5f9;
  --color-slate-50: #f8fafc;
  
  --color-gray-900: #111827;
  --color-gray-700: #374151;
  --color-gray-600: #4b5563;
  --color-gray-500: #6b7280;
  --color-gray-400: #9ca3af;
  --color-gray-300: #d1d5db;
  --color-gray-200: #e5e7eb;
  --color-gray-100: #f3f4f6;
  --color-gray-50: #f9fafb;
  
  --color-white: #ffffff;
  --color-cyan-300: #67e8f9;
  --color-cyan-400: #22d3ee;
  --color-cyan-500: #06b6d4;
  
  --color-blue-50: #eff6ff;
  --color-blue-100: #dbeafe;
  --color-blue-200: #bfdbfe;
  --color-blue-600: #2563eb;
  --color-blue-700: #1d4ed8;
  
  --color-purple-50: #faf5ff;
  --color-purple-100: #f3e8ff;
  --color-purple-200: #e9d5ff;
  --color-purple-600: #9333ea;
  --color-purple-700: #7e22ce;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;
  
  /* Font */
  --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  
  /* Shadow */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transition */
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-gray-900);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

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

ul, ol {
  list-style: none;
}

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-6);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--spacing-8);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--spacing-12);
  }
}

/* ============================================
   Header
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-gray-100);
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-6);
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.logo-text {
  display: none;
}

@media (min-width: 640px) {
  .logo-text {
    display: block;
  }
}

.logo-name {
  display: block;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-gray-900);
}

.logo-sub {
  display: block;
  font-size: 0.75rem;
  color: var(--color-gray-400);
}

.nav {
  display: none;
  align-items: center;
  gap: var(--spacing-8);
}

@media (min-width: 768px) {
  .nav {
    display: flex;
  }
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-600);
  transition: color 0.2s;
}

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

.header-actions {
  display: none;
  align-items: center;
  gap: var(--spacing-4);
}

@media (min-width: 768px) {
  .header-actions {
    display: flex;
  }
}

.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-gray-600);
}

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

.menu-icon {
  width: 24px;
  height: 24px;
}

.mobile-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-100);
  padding: var(--spacing-4);
  box-shadow: var(--shadow-lg);
}

.mobile-menu.active {
  display: block;
}

.mobile-link {
  display: block;
  padding: var(--spacing-3) var(--spacing-4);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-600);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.mobile-link:hover {
  background: var(--color-gray-50);
  color: var(--color-primary);
}

.mobile-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  padding-top: var(--spacing-4);
  margin-top: var(--spacing-4);
  border-top: 1px solid var(--color-gray-100);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2) var(--spacing-4);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}

.btn-sm {
  padding: var(--spacing-1) var(--spacing-3);
  font-size: 0.75rem;
}

.btn-lg {
  padding: var(--spacing-3) var(--spacing-6);
  font-size: 1rem;
}

.btn-full {
  width: 100%;
}

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

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

.btn-outline {
  background: transparent;
  border-color: var(--color-blue-200);
  color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-blue-50);
}

.btn-outline-light {
  background: transparent;
  border-color: rgba(34, 211, 238, 0.5);
  color: var(--color-cyan-300);
}

.btn-outline-light:hover {
  background: rgba(6, 182, 212, 0.2);
}

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

.btn-white:hover {
  background: var(--color-gray-50);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  padding: 80px 0 120px;
  overflow: hidden;
  background: var(--color-slate-900);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.7), rgba(15, 23, 42, 0.5));
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-6);
}

@media (min-width: 640px) {
  .hero {
    padding: 100px 0 140px;
  }
}

@media (min-width: 1024px) {
  .hero {
    padding: 112px 0 144px;
  }
  
  .hero-content {
    max-width: 768px;
  }
}

.hero-badge {
  display: inline-block;
  margin-bottom: var(--spacing-6);
  padding: var(--spacing-2) var(--spacing-4);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-cyan-300);
  background: rgba(6, 182, 212, 0.2);
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: var(--radius-full);
  backdrop-filter: blur(4px);
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-white);
  margin-bottom: var(--spacing-6);
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3rem;
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 3.75rem;
  }
}

.hero-title-accent {
  display: block;
  margin-top: var(--spacing-2);
  color: var(--color-cyan-300);
}

.hero-desc {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-gray-200);
  margin-bottom: var(--spacing-8);
  max-width: 640px;
}

@media (min-width: 768px) {
  .hero-desc {
    font-size: 1.125rem;
  }
}

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

.hero-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  line-height: 0;
}

.hero-wave svg {
  width: 100%;
  height: auto;
}

/* ============================================
   Stats Section
   ============================================ */
.stats {
  padding: var(--spacing-16) 0;
  background: var(--color-white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-8);
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-2);
}

@media (min-width: 768px) {
  .stat-value {
    font-size: 2.25rem;
  }
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

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

.section-badge {
  display: inline-block;
  margin-bottom: var(--spacing-4);
  padding: var(--spacing-1) var(--spacing-3);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-full);
}

.badge-blue {
  color: var(--color-primary);
  background: var(--color-blue-100);
}

.badge-purple {
  color: var(--color-purple-700);
  background: var(--color-purple-100);
}

.section-title {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.25rem;
  }
}

.section-title-left {
  text-align: left;
}

.section-desc {
  font-size: 1rem;
  color: var(--color-gray-500);
  max-width: 640px;
  margin: 0 auto;
}

.section-footer {
  text-align: center;
  margin-top: var(--spacing-10);
}

/* ============================================
   Products Section
   ============================================ */
.products {
  padding: var(--spacing-20) 0;
  background: var(--color-gray-50);
}

.products-alt {
  background: var(--color-white);
}

.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
}

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

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

.products-grid-2 {
  max-width: 896px;
  margin: 0 auto;
}

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

.product-card {
  display: block;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-gray-100);
  transition: var(--transition);
}

.product-card:hover {
  box-shadow: var(--shadow-xl);
  border-color: var(--color-blue-200);
  transform: translateY(-2px);
}

.product-card-lg {
  display: flex;
  flex-direction: column;
}

.product-img-wrap {
  position: relative;
  height: 192px;
  overflow: hidden;
  background: var(--color-gray-100);
}

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

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

.product-status {
  position: absolute;
  top: var(--spacing-3);
  right: var(--spacing-3);
  padding: var(--spacing-1) var(--spacing-3);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-white);
  background: #f97316;
  border-radius: var(--radius-full);
}

.product-content {
  padding: var(--spacing-4);
}

.product-tag {
  display: inline-block;
  margin-bottom: var(--spacing-2);
  padding: var(--spacing-1) var(--spacing-2);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-blue-50);
  border-radius: var(--radius-md);
}

.product-tag-purple {
  color: var(--color-purple-700);
  background: var(--color-purple-50);
}

.product-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-title-lg {
  font-size: 1.125rem;
}

.product-desc {
  font-size: 0.75rem;
  color: var(--color-gray-500);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-link {
  display: inline-block;
  margin-top: var(--spacing-4);
  font-size: 0.875rem;
  color: var(--color-purple-700);
  transition: color 0.2s;
}

.product-card:hover .product-link {
  color: var(--color-purple-600);
}

/* ============================================
   Cases Section
   ============================================ */
.cases {
  padding: var(--spacing-20) 0;
  background: var(--color-gray-50);
}

.cases-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
}

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

@media (min-width: 1024px) {
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 896px;
    margin: 0 auto;
  }
}

.case-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-gray-100);
  transition: var(--transition);
}

.case-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-blue-200);
}

.case-img-wrap {
  position: relative;
  height: 192px;
  overflow: hidden;
  background: var(--color-gray-100);
}

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

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

.case-tag {
  position: absolute;
  top: var(--spacing-3);
  left: var(--spacing-3);
  padding: var(--spacing-1) var(--spacing-3);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-white);
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

.case-content {
  padding: var(--spacing-5);
}

.case-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-2);
}

.case-desc {
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

/* ============================================
   About Section
   ============================================ */
.about {
  padding: var(--spacing-20) 0;
  background: var(--color-white);
}

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

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

.about-text {
  font-size: 1rem;
  color: var(--color-gray-600);
  line-height: 1.75;
  margin-bottom: var(--spacing-6);
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4);
}

.about-feature {
  padding: var(--spacing-6);
  background: var(--color-blue-50);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-blue-100);
  transition: var(--transition);
}

.about-feature:hover {
  border-color: var(--color-blue-200);
}

.about-feature-icon {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-3);
}

.about-feature-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-1);
}

.about-feature-desc {
  font-size: 0.75rem;
  color: var(--color-gray-500);
}

/* ============================================
   Scenarios Section
   ============================================ */
.scenarios {
  padding: var(--spacing-20) 0;
  background: var(--color-gray-50);
}

.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
}

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

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

.scenario-card {
  padding: var(--spacing-6);
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray-100);
  transition: var(--transition);
}

.scenario-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-blue-200);
}

.scenario-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-4);
}

.scenario-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-2);
}

.scenario-desc {
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

/* ============================================
   Features Section
   ============================================ */
.features {
  padding: var(--spacing-20) 0;
  background: var(--color-white);
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
}

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

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

.feature-card {
  padding: var(--spacing-6);
  background: var(--color-gray-50);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray-100);
  transition: var(--transition);
}

.feature-card:hover {
  border-color: var(--color-blue-200);
}

.feature-icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-blue-100);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-4);
}

.feature-icon {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.feature-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-2);
}

.feature-desc {
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
  padding: var(--spacing-20) 0;
  background: linear-gradient(to right, var(--color-primary), var(--color-cyan-500));
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
  align-items: center;
}

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

.contact-content {
  color: var(--color-white);
}

.contact-title {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: var(--spacing-4);
}

@media (min-width: 768px) {
  .contact-title {
    font-size: 2.25rem;
  }
}

.contact-desc {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-6);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-4);
}

.contact-card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-6);
  backdrop-filter: blur(4px);
}

.contact-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--spacing-4);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  color: var(--color-white);
}

.contact-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-item-content {
  display: flex;
  flex-direction: column;
}

.contact-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.8);
}

.contact-value {
  font-size: 0.875rem;
}

.contact-link {
  font-size: 0.875rem;
  color: var(--color-white);
  transition: color 0.2s;
}

.contact-link:hover {
  color: var(--color-cyan-300);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--color-slate-900);
  color: var(--color-slate-300);
  padding: var(--spacing-12) 0 var(--spacing-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
}

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

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-4);
}

.footer-logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.footer-logo-name {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
}

.footer-logo-sub {
  display: block;
  font-size: 0.75rem;
  color: var(--color-slate-500);
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--color-slate-400);
  margin-bottom: var(--spacing-4);
  max-width: 280px;
}

.footer-social {
  display: flex;
  gap: var(--spacing-4);
}

.footer-social-link {
  color: var(--color-slate-400);
  transition: color 0.2s;
}

.footer-social-link:hover {
  color: var(--color-primary);
}

.footer-social-icon {
  width: 20px;
  height: 20px;
}

.footer-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--spacing-4);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.footer-list a {
  font-size: 0.875rem;
  color: var(--color-slate-400);
  transition: color 0.2s;
}

.footer-list a:hover {
  color: var(--color-primary);
}

.footer-contact {
  margin-top: var(--spacing-6);
}

.footer-contact-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--spacing-2);
}

.footer-contact-text {
  font-size: 0.75rem;
  color: var(--color-slate-400);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-4);
  padding-top: var(--spacing-8);
  margin-top: var(--spacing-8);
  border-top: 1px solid var(--color-slate-800);
}

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

.footer-copyright {
  font-size: 0.875rem;
  color: var(--color-slate-400);
}

.footer-bottom-links {
  display: flex;
  gap: var(--spacing-6);
}

.footer-bottom-links a {
  font-size: 0.875rem;
  color: var(--color-slate-400);
  transition: color 0.2s;
}

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

/* ============================================
   Product Detail Page
   ============================================ */
.product-detail {
  padding: 96px 0 var(--spacing-16);
  background: linear-gradient(180deg, var(--color-gray-50) 0%, var(--color-white) 320px);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-8);
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

.breadcrumb a {
  color: var(--color-gray-600);
  transition: color 0.2s;
}

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

.breadcrumb-sep {
  color: var(--color-gray-300);
}

.breadcrumb-current {
  color: var(--color-gray-900);
  font-weight: 600;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
}

@media (min-width: 1024px) {
  .product-detail-grid {
    grid-template-columns: minmax(320px, 480px) 1fr;
    align-items: start;
    gap: var(--spacing-12);
  }
}

.product-detail-img-wrap {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  box-shadow: var(--shadow-lg);
}

.product-detail-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.product-detail-status {
  position: absolute;
  top: var(--spacing-4);
  right: var(--spacing-4);
  padding: var(--spacing-1) var(--spacing-3);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-white);
  background: #f97316;
  border-radius: var(--radius-full);
}

.product-detail-info {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
}

@media (min-width: 768px) {
  .product-detail-info {
    padding: var(--spacing-8);
  }
}

.product-detail-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-4);
}

.product-detail-tag {
  display: inline-block;
  padding: var(--spacing-1) var(--spacing-3);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-blue-100);
  border-radius: var(--radius-full);
}

.product-detail-category {
  display: inline-block;
  padding: var(--spacing-1) var(--spacing-3);
  font-size: 0.75rem;
  color: var(--color-gray-600);
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
}

.product-detail-title {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
}

@media (min-width: 768px) {
  .product-detail-title {
    font-size: 2.25rem;
  }
}

.product-detail-desc {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-gray-600);
}

.product-detail-section {
  margin-top: var(--spacing-8);
}

.product-detail-section-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
}

.product-detail-features {
  display: grid;
  gap: var(--spacing-3);
}

.product-detail-features li {
  position: relative;
  padding-left: var(--spacing-6);
  font-size: 0.95rem;
  color: var(--color-gray-700);
}

.product-detail-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
}

.product-detail-scenarios {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3);
}

.scenario-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-2) var(--spacing-4);
  font-size: 0.875rem;
  color: var(--color-primary-dark);
  background: var(--color-blue-50);
  border: 1px solid var(--color-blue-100);
  border-radius: var(--radius-full);
}

.product-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-4);
  margin-top: var(--spacing-8);
}

/* ============================================
   Contact CTA
   ============================================ */
.contact-cta {
  padding: var(--spacing-16) 0;
  background: linear-gradient(to right, var(--color-slate-900), var(--color-slate-800));
}

.contact-cta-content {
  text-align: center;
}

.contact-cta-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--spacing-3);
}

.contact-cta-desc {
  font-size: 1rem;
  color: var(--color-slate-300);
  margin-bottom: var(--spacing-8);
}

.contact-cta-info {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-4);
  max-width: 720px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .contact-cta-info {
    grid-template-columns: repeat(2, 1fr);
  }
}

.contact-cta-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
  padding: var(--spacing-5);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(2px);
}

.contact-cta-label {
  font-size: 0.75rem;
  color: var(--color-slate-400);
}

.contact-cta-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white);
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease forwards;
}