/* ============================================
   上海瓴达信息科技有限公司 - 全局样式
   ============================================ */

/* CSS Variables - 设计系统 */
:root {
  /* 主色调 */
  --primary: #0066FF;
  --primary-dark: #0052CC;
  --primary-light: #3385FF;

  /* 辅助色 */
  --accent: #00D4AA;
  --accent-dark: #00B894;
  --accent-light: #00F5C4;

  /* 背景色 */
  --bg-dark: #1A1A2E;
  --bg-darker: #0F0F1A;
  --bg-light: #F8FAFC;
  --bg-white: #FFFFFF;

  /* 文字色 */
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-muted: #999999;
  --text-white: #FFFFFF;

  /* 强调色 */
  --highlight: #FF6B35;

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #0066FF 0%, #00D4AA 100%);
  --gradient-dark: linear-gradient(135deg, #1A1A2E 0%, #0F0F1A 100%);
  --gradient-hero: linear-gradient(135deg, #0066FF 0%, #00D4AA 50%, #0066FF 100%);

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
  --shadow-primary: 0 4px 20px rgba(0, 102, 255, 0.3);

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 间距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --spacing-4xl: 96px;

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

  /* 字号 */
  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 30px;
  --text-4xl: 36px;
  --text-5xl: 48px;
  --text-6xl: 60px;

  /* 动画 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* 容器宽度 */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1200px;
  --container-2xl: 1400px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
}

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

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

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

/* ============================================
   Utility Classes
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-sm {
  max-width: var(--container-md);
}

.container-lg {
  max-width: var(--container-2xl);
}

.section {
  padding: var(--spacing-4xl) 0;
}

.section-sm {
  padding: var(--spacing-3xl) 0;
}

.section-lg {
  padding: var(--spacing-4xl) 0;
}

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

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

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

.section-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--spacing-3xl);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--text-base);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-white);
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 102, 255, 0.4);
  color: var(--text-white);
}

.btn-secondary {
  background: var(--bg-white);
  color: var(--primary);
  border: 2px solid var(--primary);
}

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

.btn-outline {
  background: transparent;
  color: var(--text-white);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-white);
  color: var(--text-white);
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--text-lg);
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--text-sm);
}

/* ============================================
   Header & Navigation
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: all var(--transition-normal);
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 var(--spacing-lg);
  max-width: var(--container-2xl);
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.logo svg {
  width: 40px;
  height: 40px;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text .cn {
  font-size: var(--text-base);
  font-weight: 600;
}

.logo-text .en {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-weight: 400;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--text-primary);
  padding: var(--spacing-sm) 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

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

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

/* Language Switcher */
.lang-switcher {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--spacing-sm);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  min-width: 120px;
  overflow: hidden;
}

.lang-switcher:hover .lang-dropdown,
.lang-switcher.active .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition: background var(--transition-fast);
}

.lang-option:hover {
  background: var(--bg-light);
  color: var(--primary);
}

.lang-option.active {
  background: var(--primary);
  color: var(--text-white);
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-sm);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--bg-white);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-lg);
  z-index: 999;
  max-height: calc(100vh - 72px);
  overflow-y: auto;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.mobile-nav.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.mobile-nav-link {
  font-size: var(--text-lg);
  font-weight: 500;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-dark);
  overflow: hidden;
  padding-top: 72px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(0, 102, 255, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(0, 212, 170, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-xl);
  font-size: var(--text-sm);
  color: var(--accent);
  margin-bottom: var(--spacing-xl);
  backdrop-filter: blur(10px);
}

.hero-title {
  font-size: clamp(var(--text-4xl), 8vw, var(--text-6xl));
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
}

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

.hero-desc {
  font-size: var(--text-xl);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-btns {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Hero Animation Elements */
.hero-shapes {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.1;
  animation: float 20s ease-in-out infinite;
}

.hero-shape-1 {
  width: 400px;
  height: 400px;
  background: var(--primary);
  top: -100px;
  right: -100px;
}

.hero-shape-2 {
  width: 300px;
  height: 300px;
  background: var(--accent);
  bottom: -50px;
  left: -50px;
  animation-delay: -5s;
}

.hero-shape-3 {
  width: 200px;
  height: 200px;
  background: var(--highlight);
  top: 50%;
  left: 10%;
  animation-delay: -10s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  25% { transform: translate(20px, -20px) rotate(5deg); }
  50% { transform: translate(0, -40px) rotate(0deg); }
  75% { transform: translate(-20px, -20px) rotate(-5deg); }
}

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

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.service-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

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

.service-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  font-size: var(--text-2xl);
  color: var(--text-white);
}

.service-title {
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.service-desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   Stats Section
   ============================================ */
.stats {
  background: var(--gradient-dark);
  position: relative;
  overflow: hidden;
}

.stats::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 0% 50%, rgba(0, 102, 255, 0.2) 0%, transparent 50%),
    radial-gradient(circle at 100% 50%, rgba(0, 212, 170, 0.2) 0%, transparent 50%);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  position: relative;
  z-index: 1;
}

.stat-item {
  text-align: center;
  color: var(--text-white);
}

.stat-number {
  font-size: var(--text-5xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   Cases Section
   ============================================ */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.case-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  background: var(--bg-white);
}

.case-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.case-image {
  position: relative;
  aspect-ratio: 16/10;
  background: var(--gradient-primary);
  overflow: hidden;
}

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

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

.case-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  display: flex;
  align-items: flex-end;
  padding: var(--spacing-lg);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

.case-tags {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.case-tag {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: var(--text-white);
}

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

.case-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.case-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

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

.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-lg);
  position: relative;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: var(--gradient-primary);
}

.process-step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--bg-white);
  border: 3px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--primary);
  margin: 0 auto var(--spacing-lg);
  position: relative;
  z-index: 1;
  transition: all var(--transition-normal);
}

.process-step:hover .step-number {
  background: var(--gradient-primary);
  color: var(--text-white);
  border-color: transparent;
  transform: scale(1.1);
}

.step-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.step-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
  background: var(--gradient-primary);
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  animation: pulse 10s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

.cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--text-white);
}

.cta-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.cta-desc {
  font-size: var(--text-lg);
  opacity: 0.9;
  margin-bottom: var(--spacing-xl);
}

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

.cta .btn:hover {
  background: var(--bg-light);
  color: var(--primary);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--bg-dark);
  color: var(--text-white);
  padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-brand {
  max-width: 300px;
}

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

.footer-logo svg {
  width: 40px;
  height: 40px;
}

.footer-logo-text {
  font-size: var(--text-lg);
  font-weight: 600;
}

.footer-desc {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
}

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

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--primary);
  transform: translateY(-3px);
}

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

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

.footer-link {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent);
  padding-left: var(--spacing-sm);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--spacing-md);
}

.footer-contact-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--accent);
}

.footer-bottom {
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
}

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

.footer-bottom-links a {
  color: rgba(255, 255, 255, 0.5);
}

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

/* ============================================
   Page Headers
   ============================================ */
.page-header {
  background: var(--gradient-dark);
  padding: calc(72px + var(--spacing-4xl)) 0 var(--spacing-4xl);
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(0, 102, 255, 0.2) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0, 212, 170, 0.2) 0%, transparent 50%);
}

.page-header-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.page-title {
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: var(--spacing-md);
}

.page-subtitle {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.6);
}

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

.breadcrumb span {
  color: var(--accent);
}

/* ============================================
   Services Page
   ============================================ */
.service-detail {
  padding: var(--spacing-4xl) 0;
}

.service-detail:nth-child(even) {
  background: var(--bg-light);
}

.service-detail-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.service-detail:nth-child(even) .service-detail-inner {
  direction: rtl;
}

.service-detail:nth-child(even) .service-detail-inner > * {
  direction: ltr;
}

.service-detail-content h3 {
  font-size: var(--text-3xl);
  margin-bottom: var(--spacing-lg);
}

.service-detail-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

.service-features {
  display: grid;
  gap: var(--spacing-md);
}

.service-feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.service-feature-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.service-feature-icon svg {
  width: 14px;
  height: 14px;
  color: var(--text-white);
}

.service-detail-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--gradient-primary);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-detail-image svg {
  width: 120px;
  height: 120px;
  color: rgba(255, 255, 255, 0.3);
}

/* Tech Stack */
.tech-stack {
  background: var(--bg-white);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--spacing-lg);
}

.tech-item {
  background: var(--bg-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  text-align: center;
  transition: all var(--transition-normal);
}

.tech-item:hover {
  background: var(--bg-white);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.tech-icon {
  font-size: var(--text-3xl);
  margin-bottom: var(--spacing-sm);
}

.tech-name {
  font-size: var(--text-sm);
  font-weight: 500;
}

/* FAQ */
.faq {
  background: var(--bg-light);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  font-size: var(--text-lg);
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  width: 24px;
  height: 24px;
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============================================
   Cases Page
   ============================================ */
.cases-filter {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-xl);
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--gradient-primary);
  color: var(--text-white);
  border-color: transparent;
}

.cases-grid-full {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

/* ============================================
   About Page
   ============================================ */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--gradient-primary);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-content h3 {
  font-size: var(--text-3xl);
  margin-bottom: var(--spacing-lg);
}

.about-content p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

/* Timeline */
.timeline {
  background: var(--bg-light);
}

.timeline-list {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline-list::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--gradient-primary);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-2xl);
}

.timeline-item:nth-child(odd) {
  flex-direction: row-reverse;
}

.timeline-content {
  width: 45%;
  background: var(--bg-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.timeline-year {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.timeline-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.timeline-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.timeline-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--gradient-primary);
  border: 4px solid var(--bg-light);
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

/* Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.team-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  text-align: center;
}

.team-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.team-avatar {
  aspect-ratio: 1;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.team-avatar svg {
  width: 80px;
  height: 80px;
  color: rgba(255, 255, 255, 0.5);
}

.team-info {
  padding: var(--spacing-lg);
}

.team-name {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.team-role {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* ============================================
   Contact Page
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
}

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

.contact-item {
  display: flex;
  gap: var(--spacing-lg);
}

.contact-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon svg {
  width: 24px;
  height: 24px;
  color: var(--text-white);
}

.contact-text h4 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.contact-text p {
  color: var(--text-secondary);
  font-size: var(--text-base);
}

.contact-text a {
  color: var(--primary);
}

/* Contact Form */
.contact-form {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

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

/* Map */
.map-section {
  background: var(--bg-light);
}

.map-container {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: var(--bg-white);
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
  .services-grid,
  .cases-grid,
  .cases-grid-full {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .process-steps::before {
    display: none;
  }

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

  .service-detail-inner,
  .about-intro,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .service-detail:nth-child(even) .service-detail-inner {
    direction: ltr;
  }

  .tech-grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .timeline-list::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(odd) {
    flex-direction: row;
    padding-left: 60px;
  }

  .timeline-content {
    width: 100%;
  }

  .timeline-dot {
    left: 20px;
  }
}

@media (max-width: 768px) {
  :root {
    --text-5xl: 36px;
    --text-4xl: 30px;
    --text-3xl: 24px;
  }

  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .mobile-nav {
    display: block;
  }

  .lang-switcher {
    display: none;
  }

  .services-grid,
  .cases-grid,
  .cases-grid-full,
  .process-steps {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }

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

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

  .team-grid {
    grid-template-columns: 1fr;
    max-width: 300px;
    margin: 0 auto;
  }

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

  .section {
    padding: var(--spacing-3xl) 0;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-title {
    font-size: var(--text-3xl);
  }

  .hero-desc {
    font-size: var(--text-base);
  }
}

/* ============================================
   Animations
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

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

.slide-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: all 0.6s ease;
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: all 0.6s ease;
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.6s ease;
}

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

/* Stagger children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.4s ease;
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0s; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(2) { transition-delay: 0.1s; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(3) { transition-delay: 0.2s; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(4) { transition-delay: 0.3s; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(5) { transition-delay: 0.4s; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(6) { transition-delay: 0.5s; opacity: 1; transform: translateY(0); }

/* ============================================
   Contact Modal - 微信二维码弹窗
   ============================================ */
.contact-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.contact-modal-content {
  position: relative;
  background: var(--bg-white);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  text-align: center;
  max-width: 400px;
  width: 90%;
  animation: modalIn 0.3s ease;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.contact-modal-content h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.contact-modal-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  font-size: var(--text-sm);
}

.wechat-qr-placeholder {
  background: var(--bg-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.wechat-qr-placeholder img {
  max-width: 200px;
  width: 100%;
  height: auto;
}

.contact-modal-close {
  min-width: 120px;
}

/* ============================================
   Amap 高德地图
   ============================================ */
.amap-container {
  width: 100%;
  height: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.amap-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.map-placeholder {
  width: 100%;
  height: 400px;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.map-placeholder svg {
  width: 64px;
  height: 64px;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.map-placeholder p {
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-sm);
}

.map-placeholder span {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.map-actions {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.map-actions a {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  color: var(--primary);
  font-size: var(--text-sm);
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.map-actions a:hover {
  background: var(--primary);
  color: var(--text-white);
}

/* 微信二维码区块 */
.wechat-section {
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  margin-top: var(--spacing-xl);
}

.wechat-section h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.wechat-section p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  margin-bottom: var(--spacing-lg);
}

.wechat-qr {
  display: inline-block;
  background: var(--bg-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.wechat-qr img {
  width: 150px;
  height: 150px;
  object-fit: contain;
}