/* ============================================
   Cisike Corporate Website - Main Stylesheet
   Modern Tech Theme with Dark/Light Mode
   ============================================ */

/* --- 1. CSS Custom Properties --- */
:root {
  /* Dark Theme (Default) */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: rgba(30, 41, 59, 0.8);
  --bg-glass: rgba(15, 23, 42, 0.85);
  --bg-input: rgba(30, 41, 59, 0.6);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #60a5fa;

  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --purple-500: #8b5cf6;
  --cyan-500: #06b6d4;
  --emerald-500: #10b981;

  --gradient-primary: linear-gradient(135deg, #3b82f6, #8b5cf6);
  --gradient-accent: linear-gradient(135deg, #06b6d4, #3b82f6);
  --gradient-warm: linear-gradient(135deg, #f59e0b, #ef4444);
  --gradient-text: linear-gradient(135deg, #60a5fa, #a78bfa);

  --glass-border: rgba(59, 130, 246, 0.2);
  --glass-border-hover: rgba(59, 130, 246, 0.4);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --glass-blur: blur(12px);

  --border-color: rgba(148, 163, 184, 0.1);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.15);

  /* Spacing (8px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Container */
  --container-max: 1200px;
  --container-padding: 1.5rem;
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #f0f4f8;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e2e8f0;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.85);
  --bg-input: rgba(241, 245, 249, 0.8);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-accent: #2563eb;
  --glass-border: rgba(59, 130, 246, 0.15);
  --glass-border-hover: rgba(59, 130, 246, 0.3);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --border-color: rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.08);
}

/* --- 2. CSS Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  background-image:
    radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.06) 0%, transparent 50%);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--blue-400);
}

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* --- 3. Typography --- */
@font-face {
  font-family: 'AlimamaFangYuan';
  src: url('../font/AlimamaFangYuanTiVF-Thin.woff2') format('woff2'),
       url('../font/AlimamaFangYuanTiVF-Thin.woff') format('woff');
  font-weight: 100 900;
  font-display: swap;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- 4. Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--space-20) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header h2 {
  font-size: 2rem;
  margin-bottom: var(--space-4);
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--gradient-primary);
  margin: var(--space-3) auto 0;
  border-radius: 2px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* --- 5. Header & Navigation --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  flex-shrink: 0;
}

.logo img {
  height: 48px;
}

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

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  background: transparent;
}

.theme-toggle:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.menu-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.menu-toggle:hover {
  background: var(--bg-card);
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 1px;
  transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu Overlay */
.mobile-menu {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  opacity: 0;
}

.mobile-menu.open {
  transform: translateX(0);
  opacity: 1;
}

.mobile-menu a {
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.mobile-menu a:hover {
  background: var(--bg-card);
  color: var(--text-accent);
}

/* --- 6. Hero Carousel --- */
.hero {
  margin-top: 72px;
  position: relative;
  overflow: hidden;
  background: var(--bg-secondary);
}

.carousel-track {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.carousel-track::-webkit-scrollbar {
  display: none;
}

.carousel-slide {
  min-width: 100%;
  scroll-snap-align: center;
  position: relative;
  aspect-ratio: 16 / 7;
  overflow: hidden;
}

.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.carousel-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(15, 23, 42, 0.85) 0%, rgba(15, 23, 42, 0.4) 50%, transparent 100%);
  display: flex;
  align-items: center;
  padding: 0 var(--space-16);
}

.carousel-content {
  max-width: 550px;
}

.carousel-content h2 {
  font-family: 'AlimamaFangYuan', 'Segoe UI', system-ui, sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: var(--space-4);
  line-height: 1.2;
}

.carousel-content p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.1rem;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  background: var(--gradient-primary);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.45);
  color: #ffffff;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  background: transparent;
  color: var(--text-accent);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.btn-outline:hover {
  background: var(--bg-card);
  border-color: var(--glass-border-hover);
  color: var(--text-accent);
}

.carousel-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  z-index: 10;
}

.carousel-nav:hover {
  background: var(--blue-500);
  border-color: var(--blue-500);
}

.carousel-nav svg {
  width: 20px;
  height: 20px;
}

.carousel-prev {
  left: var(--space-6);
}

.carousel-next {
  right: var(--space-6);
}

.carousel-dots {
  position: absolute;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-3);
  z-index: 10;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  border: none;
  transition: all var(--transition-base);
  cursor: pointer;
}

.carousel-dot.active {
  background: #ffffff;
  width: 30px;
  border-radius: 5px;
}

/* --- 7. Company Intro Section --- */
.about-section {
  background: var(--bg-primary);
}

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

.about-text h3 {
  font-size: 1.75rem;
  margin-bottom: var(--space-6);
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  font-size: 1rem;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.highlight-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--blue-400);
}

.highlight-icon svg {
  width: 20px;
  height: 20px;
}

.highlight-item h4 {
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.highlight-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

.about-visual {
  position: relative;
}

.about-visual-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-10);
  backdrop-filter: var(--glass-blur);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.about-visual-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(from 0deg, transparent, rgba(59, 130, 246, 0.05), transparent 30%);
  animation: rotate-bg 15s linear infinite;
}

.about-visual-inner {
  position: relative;
  z-index: 1;
}

.about-logo {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 40px rgba(59, 130, 246, 0.3);
}

.about-logo img {
  width: 80px;
  filter: brightness(0) invert(1);
}

.about-visual-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.mini-stat {
  padding: var(--space-4);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.mini-stat .num {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mini-stat .label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* --- 8. Data Statistics Section --- */
.stats-section {
  background: var(--gradient-primary);
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(90deg, rgba(255,255,255,0.03) 0px, rgba(255,255,255,0.03) 1px, transparent 1px, transparent 80px),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.03) 0px, rgba(255,255,255,0.03) 1px, transparent 1px, transparent 80px);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
  position: relative;
  z-index: 1;
}

.stat-item {
  text-align: center;
  padding: var(--space-6);
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-number .suffix {
  font-size: 1.5rem;
  font-weight: 600;
}

.stat-label {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 500;
}

.stat-desc {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  margin-top: var(--space-1);
}

/* --- 9. Project Cases Section --- */
.projects-section {
  background: var(--bg-primary);
}

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

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: var(--glass-blur);
  transition: all var(--transition-base);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--glass-border-hover);
}

.project-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
  transform: scale(1.08);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-overlay a {
  padding: var(--space-3) var(--space-6);
  background: var(--gradient-primary);
  color: #ffffff;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.9rem;
  transform: translateY(10px);
  transition: transform var(--transition-base);
}

.project-card:hover .project-overlay a {
  transform: translateY(0);
}

.project-info {
  padding: var(--space-6);
}

.project-info h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-2);
}

.project-info h3 a {
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.project-info h3 a:hover {
  color: var(--text-accent);
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  padding: 2px var(--space-3);
  background: rgba(59, 130, 246, 0.1);
  color: var(--blue-400);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
}

/* --- 10. Solutions Section --- */
.solutions-section {
  background: var(--bg-secondary);
}

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

.solution-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: var(--glass-blur);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.solution-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--glass-border-hover);
}

.solution-image {
  position: relative;
  overflow: hidden;
}

.solution-image-inner {
  height: 180px;
  background-size: cover;
  background-position: center;
  transition: transform var(--transition-slow);
}

.solution-card:hover .solution-image-inner {
  transform: scale(1.05);
}

.solution-icon-badge {
  position: absolute;
  bottom: -20px;
  left: var(--space-6);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
  z-index: 2;
}

.solution-icon-badge svg {
  width: 22px;
  height: 22px;
  color: #ffffff;
}

.solution-info {
  padding: var(--space-6);
  padding-top: calc(var(--space-6) + 12px);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.solution-info h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-2);
}

.solution-info h3 a {
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.solution-info h3 a:hover {
  color: var(--text-accent);
}

.solution-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: var(--space-4);
  flex-grow: 1;
}

.solution-features {
  margin-bottom: var(--space-4);
}

.solution-features li {
  color: var(--text-secondary);
  font-size: 0.85rem;
  padding: var(--space-1) 0;
  padding-left: var(--space-6);
  position: relative;
}

.solution-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 16px;
  height: 16px;
  transform: translateY(-50%);
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.15);
  border: 2px solid var(--blue-400);
}

.solution-features li::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 50%;
  width: 6px;
  height: 6px;
  transform: translateY(-50%);
  border-radius: 50%;
  background: var(--blue-400);
}

.solution-link {
  color: var(--text-accent);
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
}

.solution-link:hover {
  gap: var(--space-3);
  color: var(--blue-400);
}

/* --- 11. Tech Advantages Section --- */
.tech-section {
  background: var(--bg-primary);
}

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

.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  backdrop-filter: var(--glass-blur);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.tech-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

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

.tech-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--glass-border-hover);
}

.tech-card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(59, 130, 246, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  color: var(--blue-400);
  transition: all var(--transition-base);
}

.tech-card:hover .tech-card-icon {
  background: var(--gradient-primary);
  color: #ffffff;
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.tech-card-icon svg {
  width: 28px;
  height: 28px;
}

.tech-card h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-4);
  transition: color var(--transition-fast);
}

.tech-card:hover h3 {
  color: var(--text-accent);
}

.tech-features li {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: var(--space-2) 0;
  padding-left: var(--space-6);
  position: relative;
}

.tech-features li::before {
  content: '';
  position: absolute;
  left: var(--space-2);
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue-400);
}

.tech-features li span {
  color: var(--text-accent);
  font-weight: 700;
}

.tech-features li a {
  color: var(--text-accent);
  font-weight: 600;
}

/* --- 12. Testimonials Section --- */
.testimonials-section {
  background: var(--bg-secondary);
}

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

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  backdrop-filter: var(--glass-blur);
  transition: all var(--transition-base);
  position: relative;
}

.testimonial-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.testimonial-quote-icon {
  font-size: 3rem;
  line-height: 1;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-4);
  font-family: Georgia, serif;
}

.testimonial-text {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: var(--space-6);
  font-style: italic;
}

.testimonial-divider {
  width: 40px;
  height: 2px;
  background: var(--gradient-primary);
  margin-bottom: var(--space-4);
  border-radius: 1px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 700;
  font-size: 1rem;
}

.testimonial-author-info h4 {
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.testimonial-author-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.testimonial-stars {
  color: #f59e0b;
  font-size: 0.85rem;
  letter-spacing: 2px;
  margin-top: var(--space-3);
}

/* --- 13. Partners Section --- */
.partners-section {
  background: var(--bg-primary);
  overflow: hidden;
}

.partners-marquee {
  display: flex;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
}

.partners-track {
  display: flex;
  gap: var(--space-16);
  animation: marquee 20s linear infinite;
  align-items: center;
  padding: var(--space-8) 0;
}

.partner-item {
  flex-shrink: 0;
  padding: var(--space-6) var(--space-8);
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: var(--glass-blur);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  white-space: nowrap;
  transition: all var(--transition-base);
  opacity: 0.6;
  filter: grayscale(50%);
}

.partner-item:hover {
  opacity: 1;
  filter: grayscale(0%);
  border-color: var(--glass-border-hover);
  box-shadow: var(--shadow-glow);
}

.partner-item svg {
  width: 28px;
  height: 28px;
  color: var(--blue-400);
}

.partner-item span {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.partner-item .partner-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 400;
}

/* --- 14. Contact Section --- */
.contact-section {
  background: var(--bg-secondary);
}

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

.contact-form-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  backdrop-filter: var(--glass-blur);
}

.contact-form-card h3 {
  font-size: 1.3rem;
  margin-bottom: var(--space-6);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-input);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  outline: none;
}

.form-control:focus {
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-control::placeholder {
  color: var(--text-muted);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.btn-submit {
  width: 100%;
  padding: var(--space-3) var(--space-8);
  background: var(--gradient-primary);
  color: #ffffff;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.45);
}

.form-message {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-top: var(--space-4);
  display: none;
}

.form-message.success {
  display: block;
  background: rgba(16, 185, 129, 0.1);
  color: var(--emerald-500);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-message.error {
  display: block;
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.contact-info-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.contact-info-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  backdrop-filter: var(--glass-blur);
  text-align: center;
  transition: all var(--transition-base);
}

.contact-info-card:hover {
  border-color: var(--glass-border-hover);
  box-shadow: var(--shadow-glow);
}

.contact-info-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  color: var(--blue-400);
}

.contact-info-icon svg {
  width: 24px;
  height: 24px;
}

.contact-info-card h4 {
  font-size: 1rem;
  margin-bottom: var(--space-2);
}

.contact-info-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Subscription Card */
.subscribe-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  backdrop-filter: var(--glass-blur);
  text-align: center;
}

.subscribe-card h4 {
  font-size: 1.1rem;
  margin-bottom: var(--space-2);
}

.subscribe-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: var(--space-4);
}

.subscribe-form {
  display: flex;
  gap: var(--space-2);
}

.subscribe-form .form-control {
  flex-grow: 1;
}

.subscribe-form .btn-submit {
  width: auto;
  white-space: nowrap;
  padding: var(--space-3) var(--space-6);
}

/* --- 15. Footer --- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-12) 0 var(--space-6);
}

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

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: var(--space-4);
  max-width: 300px;
}

.footer-brand .logo img {
  height: 40px;
}

.footer-links h5 {
  font-size: 1rem;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.footer-links ul li {
  margin-bottom: var(--space-2);
}

.footer-links ul li a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.footer-links ul li a:hover {
  color: var(--text-accent);
  padding-left: var(--space-2);
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-contact li svg {
  width: 16px;
  height: 16px;
  color: var(--blue-400);
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: center;
  text-align: center;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* --- 16. Scroll to Top --- */
.scroll-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
  transition: all var(--transition-base);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  z-index: 900;
  border: none;
  cursor: pointer;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.45);
}

.scroll-top svg {
  width: 20px;
  height: 20px;
}

/* --- 17. Animations --- */
@keyframes rotate-bg {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3); }
  50% { box-shadow: 0 4px 25px rgba(59, 130, 246, 0.5); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Scroll Reveal Base */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animate="fade-left"] {
  transform: translateX(-40px);
}

[data-animate="fade-right"] {
  transform: translateX(40px);
}

[data-animate="scale"] {
  transform: scale(0.9);
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
}

/* Stagger delay */
[data-animate][style*="--delay"] {
  transition-delay: var(--delay);
}

/* --- 18. Responsive Breakpoints (Mobile-First) --- */

/* SM: >= 640px */
@media (min-width: 640px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

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

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

/* MD: >= 768px */
@media (min-width: 768px) {
  h1 { font-size: 3rem; }

  .section-header h2 {
    font-size: 2.25rem;
  }

  .carousel-content h2 {
    font-size: 3rem;
  }

  .stat-number {
    font-size: 3.5rem;
  }

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

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

/* LG: >= 1024px */
@media (min-width: 1024px) {
  .nav-links {
    display: flex;
  }

  .menu-toggle {
    display: none;
  }

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

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

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

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

/* XL: >= 1280px */
@media (min-width: 1280px) {
  :root {
    --container-max: 1200px;
  }

  .carousel-content h2 {
    font-size: 3.25rem;
  }

  .stat-number {
    font-size: 4rem;
  }
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  [data-animate] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}