/* ============================================
   CSS Variables & Theme
   ============================================ */
:root {
  --color-deep-blue: #0a2647;
  --color-mid-blue: #144272;
  --color-bright-blue: #205295;
  --color-light-blue: #2c74b3;
  --color-white: #ffffff;
  --color-off-white: #f8f9fa;
  --color-light-gray: #e9ecef;
  --color-gray: #6c757d;
  --color-dark-gray: #343a40;
  --color-text: #2d3436;
  --color-text-light: #636e72;
  --color-accent: #00d2ff;
  --color-success: #00b894;
  --color-warning: #fdcb6e;

  --font-family:
    "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;
  --font-size-3xl: 42px;
  --font-size-4xl: 56px;

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

  --border-radius: 8px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;

  --shadow-sm: 0 2px 8px rgba(10, 38, 71, 0.08);
  --shadow-md: 0 4px 16px rgba(10, 38, 71, 0.12);
  --shadow-lg: 0 8px 32px rgba(10, 38, 71, 0.16);
  --shadow-xl: 0 16px 48px rgba(10, 38, 71, 0.2);

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  --navbar-height: 72px;
  --container-max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: var(--font-size-base);
}

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

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

ul {
  list-style: none;
}

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

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

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

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
  font-size: var(--font-size-2xl);
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-sm);
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--color-light-blue),
    var(--color-accent)
  );
  border-radius: 2px;
}

.section-header p {
  color: var(--color-text-light);
  font-size: var(--font-size-lg);
  margin-top: var(--spacing-md);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

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

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

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

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

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes rotateIn {
  from {
    opacity: 0;
    transform: rotate(-10deg) scale(0.9);
  }
  to {
    opacity: 1;
    transform: rotate(0) scale(1);
  }
}

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-fadeInLeft {
  animation: fadeInLeft 0.6s ease forwards;
}

.animate-fadeInRight {
  animation: fadeInRight 0.6s ease forwards;
}

.animate-scaleIn {
  animation: scaleIn 0.5s ease forwards;
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

/* Staggered animation delays */
.delay-1 {
  animation-delay: 0.1s;
}
.delay-2 {
  animation-delay: 0.2s;
}
.delay-3 {
  animation-delay: 0.3s;
}
.delay-4 {
  animation-delay: 0.4s;
}
.delay-5 {
  animation-delay: 0.5s;
}
.delay-6 {
  animation-delay: 0.6s;
}

/* ============================================
   Page Transitions
   ============================================ */
.page-enter-active,
.page-leave-active {
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
}

.page-enter-from {
  opacity: 0;
  transform: translateY(10px);
}

.page-leave-to {
  opacity: 0;
  transform: translateY(-10px);
}

.fade-enter-active,
.fade-leave-active {
  transition: opacity var(--transition-normal);
}

.fade-enter-from,
.fade-leave-to {
  opacity: 0;
}

/* ============================================
   Navbar
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  transition: all var(--transition-normal);
  background: rgba(10, 38, 71, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

/* 首页Hero区域顶部时导航栏透明 */
.navbar-transparent {
  background: transparent;
  box-shadow: none;
}

@media (max-width: 768px) {
  .navbar-transparent {
    background: rgba(10, 38, 71, 0.95) !important;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(10px);
  }
}

.navbar-scrolled {
  background: rgba(10, 38, 71, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  height: 64px;
}

.nav-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  z-index: 1001;
}

.logo-icon img {
  display: block;
  width: 40px;
  height: 40px;
  object-fit: contain;
  transition: transform var(--transition-normal);
}

.nav-logo:hover .logo-icon img {
  transform: rotate(15deg);
}

.logo-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 2px;
}

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

.nav-link {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--font-size-lg);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-normal);
  border-radius: 1px;
}

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

.nav-link:hover::after,
.nav-link.router-link-active::after {
  width: 60%;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 30px;
  height: 30px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
  padding: 0;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition-normal);
  transform-origin: center;
}

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

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

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

/* ============================================
   Main Content
   ============================================ */
.main-content {
  min-height: 100vh;
}

/* ============================================
   Hero Section (Home)
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    135deg,
    var(--color-deep-blue) 0%,
    var(--color-mid-blue) 40%,
    var(--color-bright-blue) 100%
  );
  overflow: hidden;
  padding-top: 0;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(
      circle at 20% 50%,
      rgba(44, 116, 179, 0.3) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 20%,
      rgba(0, 210, 255, 0.15) 0%,
      transparent 40%
    ),
    radial-gradient(
      circle at 60% 80%,
      rgba(44, 116, 179, 0.2) 0%,
      transparent 40%
    );
  animation: gradientShift 8s ease infinite;
  background-size: 200% 200%;
}

.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  animation: float 6s ease-in-out infinite;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--spacing-md);
  max-width: 800px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 20px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  color: var(--color-accent);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.6s ease forwards;
  backdrop-filter: blur(4px);
}

.hero h1 {
  font-size: var(--font-size-4xl);
  color: var(--color-white);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.6s ease 0.2s forwards;
  opacity: 0;
}

.hero h1 .highlight {
  background: linear-gradient(90deg, var(--color-accent), #00f5d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .hero-subtitle {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 0.6s ease 0.4s forwards;
  opacity: 0;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.6s forwards;
  opacity: 0;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  animation: fadeInUp 0.6s ease 0.8s forwards;
  opacity: 0;
}

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

.hero-stat .number {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-accent);
}

.hero-stat .label {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  margin-top: 4px;
}

/* Circuit board decoration */
.hero-circuit {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  opacity: 0.1;
  background-image:
    linear-gradient(
      90deg,
      transparent 49%,
      rgba(255, 255, 255, 0.3) 49%,
      rgba(255, 255, 255, 0.3) 51%,
      transparent 51%
    ),
    linear-gradient(
      0deg,
      transparent 49%,
      rgba(255, 255, 255, 0.3) 49%,
      rgba(255, 255, 255, 0.3) 51%,
      transparent 51%
    );
  background-size: 60px 60px;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  font-family: var(--font-family);
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--color-light-blue),
    var(--color-accent)
  );
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(44, 116, 179, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(44, 116, 179, 0.6);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-white);
  transform: translateY(-2px);
}

.btn-blue {
  background: linear-gradient(
    135deg,
    var(--color-light-blue),
    var(--color-bright-blue)
  );
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-blue:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   Cards
   ============================================ */
.card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 1px solid var(--color-light-gray);
}

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

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  font-size: 28px;
}

.card-icon.blue {
  background: linear-gradient(
    135deg,
    rgba(44, 116, 179, 0.1),
    rgba(0, 210, 255, 0.1)
  );
  color: var(--color-light-blue);
}

.card-icon.green {
  background: linear-gradient(
    135deg,
    rgba(0, 184, 148, 0.1),
    rgba(0, 245, 212, 0.1)
  );
  color: var(--color-success);
}

.card-icon.orange {
  background: linear-gradient(
    135deg,
    rgba(253, 203, 110, 0.1),
    rgba(255, 159, 67, 0.1)
  );
  color: #ff9f43;
}

.card-icon.purple {
  background: linear-gradient(
    135deg,
    rgba(108, 92, 231, 0.1),
    rgba(162, 155, 254, 0.1)
  );
  color: #6c5ce7;
}

.card h3 {
  font-size: var(--font-size-lg);
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-xs);
}

.card p {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  line-height: 1.7;
}

/* ============================================
   Grid Layouts
   ============================================ */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

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

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

/* ============================================
   About Section (Home)
   ============================================ */
.about-preview {
  background: var(--color-off-white);
}

.about-preview .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.about-text h2 {
  font-size: var(--font-size-2xl);
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-md);
}

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

.about-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.about-value-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 10px 16px;
  background: var(--color-white);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  color: var(--color-deep-blue);
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

.about-value-item .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-light-blue);
  flex-shrink: 0;
}

.about-visual {
  position: relative;
}

.about-visual-card {
  background: linear-gradient(
    135deg,
    var(--color-deep-blue),
    var(--color-bright-blue)
  );
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-xl);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.about-visual-card::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(0, 210, 255, 0.2), transparent 70%);
}

.about-visual-card .big-number {
  font-size: 64px;
  font-weight: 800;
  line-height: 1;
  position: relative;
  z-index: 1;
}

.about-visual-card .big-label {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  margin-top: var(--spacing-xs);
  position: relative;
  z-index: 1;
}

.about-visual-card .big-desc {
  font-size: var(--font-size-sm);
  opacity: 0.7;
  margin-top: var(--spacing-sm);
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

.about-mini-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.about-mini-card {
  background: var(--color-white);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.about-mini-card .num {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-light-blue);
}

.about-mini-card .txt {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-top: 4px;
}

/* ============================================
   Services Preview (Home)
   ============================================ */
.services-preview {
  background: var(--color-white);
}

/* ============================================
   Advantages Preview (Home)
   ============================================ */
.advantages-preview {
  background: var(--color-off-white);
}

.advantage-highlight {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}

.advantage-item {
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border-top: 3px solid transparent;
}

.advantage-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-top-color: var(--color-light-blue);
}

.advantage-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-md);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  background: linear-gradient(
    135deg,
    rgba(44, 116, 179, 0.1),
    rgba(0, 210, 255, 0.1)
  );
}

.advantage-item h3 {
  font-size: var(--font-size-lg);
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-xs);
}

.advantage-item p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ============================================
   CTA Section (Home)
   ============================================ */
.cta-section {
  background: linear-gradient(
    135deg,
    var(--color-deep-blue),
    var(--color-bright-blue)
  );
  text-align: center;
  padding: var(--spacing-3xl) 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(
      circle at 30% 50%,
      rgba(0, 210, 255, 0.15) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 70% 50%,
      rgba(44, 116, 179, 0.2) 0%,
      transparent 50%
    );
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  font-size: var(--font-size-2xl);
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
}

.cta-section p {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   About Page
   ============================================ */
.page-hero {
  background: linear-gradient(
    135deg,
    var(--color-deep-blue) 0%,
    var(--color-bright-blue) 100%
  );
  padding: calc(var(--spacing-3xl) + var(--navbar-height)) 0 var(--spacing-2xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(
      circle at 20% 80%,
      rgba(0, 210, 255, 0.15) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 20%,
      rgba(44, 116, 179, 0.2) 0%,
      transparent 50%
    );
}

.page-hero-content {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  font-size: var(--font-size-3xl);
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
}

.page-hero p {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-lg);
}

/* Company Intro */
.company-intro {
  background: var(--color-white);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: start;
}

.intro-text h3 {
  font-size: var(--font-size-xl);
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-md);
}

.intro-text p {
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

/* 主题色加粗强调文字 */
.brand-highlight {
  color: var(--color-light-blue);
  font-weight: 700;
}

.intro-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
}

.intro-info-item {
  padding: var(--spacing-md);
  background: var(--color-off-white);
  border-radius: var(--border-radius);
  text-align: center;
  transition: all var(--transition-normal);
}

.intro-info-item:hover {
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.intro-info-item .info-icon {
  font-size: 28px;
  margin-bottom: var(--spacing-xs);
}

.intro-info-item .info-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.intro-info-item .info-value {
  font-size: var(--font-size-base);
  color: var(--color-deep-blue);
  font-weight: 600;
  margin-top: 4px;
}

/* Culture */
.culture-section {
  background: var(--color-off-white);
}

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

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

.culture-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--color-light-blue),
    var(--color-accent)
  );
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

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

.culture-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.culture-card .culture-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--spacing-md);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  background: linear-gradient(
    135deg,
    rgba(44, 116, 179, 0.1),
    rgba(0, 210, 255, 0.1)
  );
}

.culture-card h3 {
  font-size: var(--font-size-lg);
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-xs);
}

.culture-card p {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  line-height: 1.7;
}

/* Timeline */
.timeline-section {
  background: var(--color-white);
}

.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-lg) 0;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(
    to bottom,
    var(--color-light-blue),
    var(--color-accent)
  );
  transform: translateX(-50%);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: var(--spacing-md) var(--spacing-xl);
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
  text-align: left;
}

.timeline-item::before {
  content: "";
  position: absolute;
  top: 24px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-light-blue);
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 3px var(--color-light-blue);
  z-index: 1;
}

.timeline-item:nth-child(odd)::before {
  right: -8px;
}

.timeline-item:nth-child(even)::before {
  left: -8px;
}

.timeline-date {
  display: inline-block;
  padding: 4px 16px;
  background: linear-gradient(
    135deg,
    var(--color-light-blue),
    var(--color-bright-blue)
  );
  color: var(--color-white);
  border-radius: 50px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.timeline-content {
  background: var(--color-off-white);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.timeline-content:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.timeline-content h4 {
  color: var(--color-deep-blue);
  margin-bottom: 4px;
}

.timeline-content p {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* ============================================
   Services Page
   ============================================ */
.services-detail {
  background: var(--color-white);
}

.service-detail-card {
  background: var(--color-white);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-light-gray);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.service-detail-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(
    to bottom,
    var(--color-light-blue),
    var(--color-accent)
  );
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.service-detail-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.service-detail-card:hover::after {
  opacity: 1;
}

.service-detail-card .service-number {
  font-size: 48px;
  font-weight: 800;
  color: rgba(44, 116, 179, 0.08);
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-lg);
  line-height: 1;
}

.service-detail-card h3 {
  font-size: var(--font-size-xl);
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.service-detail-card p {
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: var(--spacing-sm);
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.service-tag {
  padding: 4px 12px;
  background: rgba(44, 116, 179, 0.08);
  color: var(--color-light-blue);
  border-radius: 50px;
  font-size: 12px;
  font-weight: 500;
}

/* Products */
.products-section {
  background: var(--color-off-white);
}

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

.product-card {
  background: var(--color-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.product-card-header {
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  position: relative;
  overflow: hidden;
  background: #0a2647;
}

.product-card-header img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-normal);
}

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

.product-card-header.bg-1 {
  background: linear-gradient(
    135deg,
    var(--color-deep-blue),
    var(--color-mid-blue)
  );
}

.product-card-header.bg-2 {
  background: linear-gradient(
    135deg,
    var(--color-mid-blue),
    var(--color-bright-blue)
  );
}

.product-card-header.bg-3 {
  background: linear-gradient(
    135deg,
    var(--color-bright-blue),
    var(--color-light-blue)
  );
}

.product-card-header.bg-4 {
  background: linear-gradient(
    135deg,
    var(--color-light-blue),
    var(--color-accent)
  );
}

.product-card-header.bg-5 {
  background: linear-gradient(135deg, #0a2647, #2c74b3);
}

.product-card-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
    circle at 30% 70%,
    rgba(255, 255, 255, 0.1),
    transparent 60%
  );
}

.product-card-body {
  padding: var(--spacing-md);
}

.product-card-body h4 {
  font-size: var(--font-size-lg);
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-xs);
}

.product-card-body p {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* ============================================
   Advantages Page
   ============================================ */
.advantages-detail {
  background: var(--color-white);
}

.advantage-detail-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--spacing-lg);
  align-items: start;
  padding: var(--spacing-xl);
  background: var(--color-off-white);
  border-radius: var(--border-radius-xl);
  transition: all var(--transition-normal);
  border: 1px solid transparent;
}

.advantage-detail-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-light-blue);
  background: var(--color-white);
}

.advantage-detail-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  background: linear-gradient(
    135deg,
    var(--color-deep-blue),
    var(--color-bright-blue)
  );
  flex-shrink: 0;
  box-shadow: var(--shadow-md);
}

.advantage-detail-content h3 {
  font-size: var(--font-size-xl);
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-xs);
}

.advantage-detail-content p {
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: var(--spacing-sm);
}

.advantage-detail-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xs);
}

.advantage-detail-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.advantage-detail-list li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-light-blue);
  flex-shrink: 0;
}

/* ============================================
   Plan Page
   ============================================ */
.plan-section {
  background: var(--color-white);
}

.plan-roadmap {
  max-width: 900px;
  margin: 0 auto;
}

.plan-phase {
  position: relative;
  margin-bottom: var(--spacing-xl);
  padding-left: 60px;
}

.plan-phase::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 40px;
  bottom: -32px;
  width: 2px;
  background: var(--color-light-gray);
}

.plan-phase:last-child::before {
  display: none;
}

.plan-phase-marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: var(--font-size-lg);
  color: var(--color-white);
  background: linear-gradient(
    135deg,
    var(--color-light-blue),
    var(--color-bright-blue)
  );
  box-shadow: 0 4px 12px rgba(44, 116, 179, 0.3);
}

.plan-phase-content {
  background: var(--color-off-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.plan-phase-content:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.plan-phase-content h3 {
  font-size: var(--font-size-xl);
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-xs);
}

.plan-phase-content .phase-period {
  display: inline-block;
  padding: 4px 16px;
  background: linear-gradient(
    135deg,
    var(--color-light-blue),
    var(--color-accent)
  );
  color: var(--color-white);
  border-radius: 50px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

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

.plan-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xs);
}

.plan-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--color-white);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.plan-item:hover {
  background: rgba(44, 116, 179, 0.05);
  transform: translateX(4px);
}

.plan-item::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--color-light-blue);
  flex-shrink: 0;
}

/* ============================================
   Contact Page
   ============================================ */
.contact-section {
  background: var(--color-white);
}

/* 联系信息两列网格 */
.contact-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.contact-info-card {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-off-white);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-normal);
}

.contact-info-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  background: linear-gradient(
    135deg,
    var(--color-deep-blue),
    var(--color-bright-blue)
  );
  color: var(--color-white);
  flex-shrink: 0;
}

.contact-info-text h4 {
  font-size: var(--font-size-base);
  color: var(--color-deep-blue);
  margin-bottom: 4px;
}

.contact-info-text p {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* 百度地图区域 */
.contact-map-section {
  background: var(--color-off-white);
  padding: var(--spacing-3xl) 0;
}

#baidu-map {
  width: 100%;
  height: 500px;
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 2px solid var(--color-light-gray);
}

.contact-form-wrapper {
  background: var(--color-off-white);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-xl);
}

.contact-form-wrapper h3 {
  font-size: var(--font-size-xl);
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-md);
}

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

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-deep-blue);
  font-weight: 600;
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--color-light-gray);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-white);
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-light-blue);
  box-shadow: 0 0 0 3px rgba(44, 116, 179, 0.1);
}

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

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

.form-submit {
  width: 100%;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--color-deep-blue);
  color: rgba(255, 255, 255, 0.8);
  padding-top: var(--spacing-2xl);
}

.footer-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--spacing-xl);
}

.footer-section h3 {
  color: var(--color-white);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  position: relative;
  padding-bottom: var(--spacing-xs);
}

.footer-section h3::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

.footer-about p {
  font-size: var(--font-size-sm);
  line-height: 1.8;
  opacity: 0.8;
}

.footer-links ul li,
.footer-services ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-links ul li a,
.footer-services ul li {
  font-size: var(--font-size-sm);
  opacity: 0.8;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-links ul li a:hover {
  opacity: 1;
  color: var(--color-accent);
  transform: translateX(4px);
}

.footer-contact ul li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

.footer-contact ul li svg {
  flex-shrink: 0;
  margin-top: 2px;
  opacity: 0.6;
}

.footer-bottom {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-md) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: var(--font-size-sm);
  opacity: 0.6;
}

/* ============================================
   Back to Top
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    var(--color-light-blue),
    var(--color-bright-blue)
  );
  color: var(--color-white);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  z-index: 999;
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
  :root {
    --font-size-4xl: 42px;
    --font-size-3xl: 32px;
    --font-size-2xl: 28px;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (max-width: 768px) {
  :root {
    --font-size-4xl: 32px;
    --font-size-3xl: 26px;
    --font-size-2xl: 24px;
    --font-size-xl: 20px;
    --spacing-3xl: 64px;
    --spacing-2xl: 48px;
  }

  /* Navbar mobile */
  .hamburger {
    display: flex;
    z-index: 10000;
  }

  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    /* bottom: 0; */
    background: rgba(10, 38, 71, 0.98);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
  }

  .nav-links-open {
    transform: translateX(0);
    z-index: 9000;
  }

  .nav-link {
    font-size: var(--font-size-lg);
    padding: var(--spacing-sm) var(--spacing-lg);
  }

  /* Grids */
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .about-preview .container,
  .intro-grid,
  .contact-info-grid {
    grid-template-columns: 1fr;
  }

  #baidu-map {
    height: 350px;
  }

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

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

  .advantage-highlight {
    grid-template-columns: 1fr;
  }

  .advantage-detail-list,
  .plan-items {
    grid-template-columns: 1fr;
  }

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

  .intro-info-grid {
    grid-template-columns: 1fr;
  }

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

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

  /* Timeline mobile */
  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    width: 100%;
    left: 0 !important;
    text-align: left !important;
    padding-left: 50px;
    padding-right: var(--spacing-md);
  }

  .timeline-item::before {
    left: 12px !important;
    right: auto !important;
  }

  /* Plan mobile */
  .plan-phase {
    padding-left: 50px;
  }

  .plan-phase-marker {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-base);
  }

  /* Hero stats */
  .hero-stats {
    gap: var(--spacing-md);
  }

  .hero-stat .number {
    font-size: var(--font-size-xl);
  }

  /* Advantage detail */
  .advantage-detail-card {
    grid-template-columns: auto 1fr;
  }

  .advantage-detail-icon {
    width: 60px;
    height: 60px;
    font-size: 28px;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-4xl: 28px;
    --font-size-3xl: 22px;
    --font-size-2xl: 20px;
    --spacing-3xl: 48px;
    --spacing-2xl: 32px;
    --spacing-xl: 24px;
  }

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

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

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

  .service-tags {
    justify-content: center;
  }

  .plan-items {
    grid-template-columns: 1fr;
  }

  .advantage-detail-card {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .advantage-detail-icon {
    margin: 0 auto;
  }

  .advantage-detail-list {
    text-align: left;
  }

  .contact-form-wrapper {
    padding: var(--spacing-md);
  }
}

/* ============================================
   Scrollbar Styling
   ============================================ */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-off-white);
}

::-webkit-scrollbar-thumb {
  background: var(--color-light-blue);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-bright-blue);
}

/* ============================================
   Selection
   ============================================ */
::selection {
  background: var(--color-light-blue);
  color: var(--color-white);
}