/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
}

body {
  font-family: "Inter", sans-serif;
  line-height: 1.6;
  color: var(--text);
  background-color: #fff;
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
}

/* 移动端防水平滚动 */
@media (max-width: 768px) {
  html,
  body {
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
    position: relative;
  }

  main {
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
  }
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
  box-sizing: border-box;
}

/* 主色调与品牌色 */
:root {
  --primary: #2563eb;
  --primary-dark: #1741a6;
  --secondary: #f5f7fa;
  --accent: #f59e42;
  --text: #222;
  --shadow: 0 4px 16px rgba(37, 99, 235, 0.08);
}

.highlight {
  color: #00d4ff;
  background: linear-gradient(45deg, #00d4ff, #0099cc);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Section Styles */
section {
  padding: 50px 0;
  position: relative;
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
  box-sizing: border-box;
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding-top: 120px;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
  margin-top: 0;
}

.section-header h2 {
  font-size: 3rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1rem;
  position: relative;
}

.section-header h2::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(45deg, #00d4ff, #0099cc);
  border-radius: 2px;
}

.section-header p {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 300;
}

/* 基础滚动动画 */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s, transform 0.7s;
}

[data-animate].visible {
  opacity: 1;
  transform: none;
} /* Navigation Styles */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(10, 10, 10, 0.1);
  backdrop-filter: blur(15px);
  z-index: 1000;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo h2 {
  color: #fff;
  font-size: 1.8rem;
  font-weight: 700;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-menu a {
  color: #fff;
  position: relative;
  transition: all 0.3s ease;
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: #00d4ff;
  background: rgba(0, 212, 255, 0.1);
  transform: translateY(-2px);
}

.nav-menu a.active::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: #00d4ff;
  border-radius: 1px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 28px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
  transition: all 0.3s;
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: rgba(10, 10, 10, 0.95);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    padding: 2rem 0;
    backdrop-filter: blur(10px);
  }

  .nav-menu.open {
    left: 0;
  }

  .nav-toggle {
    display: flex;
  }
} /* Hero Section */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 0;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    #0a0a0a 0%,
    #1a1a2e 30%,
    #16213e 70%,
    #0f3460 100%
  );
  overflow: hidden;
}

.hero-background::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
      circle at 10% 20%,
      rgba(0, 212, 255, 0.15) 0%,
      transparent 20%
    ),
    radial-gradient(
      circle at 90% 80%,
      rgba(0, 255, 204, 0.1) 0%,
      transparent 20%
    ),
    radial-gradient(
      circle at 50% 50%,
      rgba(138, 43, 226, 0.08) 0%,
      transparent 25%
    ),
    radial-gradient(
      circle at 30% 70%,
      rgba(138, 43, 226, 0.06) 0%,
      transparent 15%
    );
  animation: backgroundShift 20s ease-in-out infinite;
}

.neural-network {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(
      circle at 20% 20%,
      rgba(0, 212, 255, 0.15) 0%,
      transparent 40%
    ),
    radial-gradient(
      circle at 80% 80%,
      rgba(0, 153, 204, 0.12) 0%,
      transparent 40%
    ),
    radial-gradient(
      circle at 40% 60%,
      rgba(0, 255, 204, 0.08) 0%,
      transparent 35%
    ),
    radial-gradient(
      circle at 70% 30%,
      rgba(138, 43, 226, 0.06) 0%,
      transparent 30%
    ),
    radial-gradient(
      circle at 30% 90%,
      rgba(138, 43, 226, 0.05) 0%,
      transparent 25%
    );
  animation: neuralPulse 12s ease-in-out infinite,
    neuralMove 25s linear infinite;
}

.floating-orbs {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(0, 212, 255, 0.3) 0%,
    rgba(0, 212, 255, 0.1) 50%,
    transparent 100%
  );
  filter: blur(1px);
  animation: float-orbs 15s ease-in-out infinite;
}

.orb:nth-child(1) {
  width: 60px;
  height: 60px;
  top: 20%;
  left: 10%;
  animation-delay: 0s;
  animation-duration: 20s;
}

.orb:nth-child(2) {
  width: 40px;
  height: 40px;
  top: 60%;
  left: 80%;
  animation-delay: -5s;
  animation-duration: 18s;
  background: radial-gradient(
    circle,
    rgba(0, 255, 204, 0.3) 0%,
    rgba(0, 255, 204, 0.1) 50%,
    transparent 100%
  );
}

.orb:nth-child(3) {
  width: 80px;
  height: 80px;
  top: 80%;
  left: 20%;
  animation-delay: -10s;
  animation-duration: 25s;
  background: radial-gradient(
    circle,
    rgba(138, 43, 226, 0.2) 0%,
    rgba(138, 43, 226, 0.08) 50%,
    transparent 100%
  );
}

.orb:nth-child(4) {
  width: 50px;
  height: 50px;
  top: 30%;
  left: 70%;
  animation-delay: -15s;
  animation-duration: 22s;
  background: radial-gradient(
    circle,
    rgba(138, 43, 226, 0.2) 0%,
    rgba(138, 43, 226, 0.08) 50%,
    transparent 100%
  );
}

.hero-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  max-width: 1200px;
  width: 100%;
  z-index: 2;
  padding: 2rem;
  box-sizing: border-box;
}

.hero-content {
  text-align: left;
  color: #fff;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.hero-title-wrapper {
  position: relative;
}

.hero-title {
  font-size: 4.5rem;
  font-weight: 700;
  line-height: 1.1;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.title-line {
  display: block;
  position: relative;
  overflow: hidden;
}

.subtitle-line {
  font-size: 0.75em;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: 2px;
  margin-top: 0.5rem;
}

.typing-text {
  background: linear-gradient(135deg, #00d4ff, #0099cc, #00ffcc);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 4s ease-in-out infinite;
  position: relative;
}

.typing-text::after {
  content: "|";
  color: #00d4ff;
  animation: blink 1s infinite;
}

.hero-description {
  text-align: left;
}

.hero-subtitle {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: #fff;
  font-weight: 600;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-tagline {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 300;
  line-height: 1.6;
  margin: 0;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: flex-start;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.image-container {
  position: relative;
  width: 100%;
  max-width: 500px;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
  transition: all 0.3s ease;
}

.image-container:hover {
  transform: perspective(1000px) rotateY(0deg) rotateX(0deg) scale(1.02);
  box-shadow: 0 25px 80px rgba(0, 212, 255, 0.2);
}

.image-container img {
  width: 100%;
  height: auto;
  display: block;
  transition: all 0.3s ease;
}

.image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), transparent);
  pointer-events: none;
}

.tech-elements {
  position: absolute;
  width: 100%;
  height: 100%;
}

.tech-circle {
  position: absolute;
  border: 2px solid rgba(0, 212, 255, 0.6);
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.1);
  animation: techPulse 3s ease-in-out infinite;
}

.tech-circle:nth-child(1) {
  width: 60px;
  height: 60px;
  top: 20%;
  left: 15%;
  animation-delay: 0s;
}

.tech-circle:nth-child(2) {
  width: 40px;
  height: 40px;
  top: 60%;
  right: 20%;
  animation-delay: 1s;
}

.tech-circle:nth-child(3) {
  width: 80px;
  height: 80px;
  bottom: 15%;
  left: 60%;
  animation-delay: 2s;
}

.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-indicator span {
  display: block;
  width: 2px;
  height: 30px;
  background: #00d4ff;
  animation: scrollBounce 2s infinite;
}

/* Hero Section Responsive */
@media (max-width: 768px) {
  .hero-main {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
    padding: 1rem;
    max-width: 100%;
    overflow-x: hidden;
  }

  .hero-content {
    text-align: center;
    order: 2;
  }

  .hero-image {
    order: 1;
  }

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

  .hero-buttons {
    justify-content: center;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }

  .hero-title {
    font-size: 2.8rem;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

  .hero-tagline {
    font-size: 1rem;
  }

  .image-container {
    max-width: 400px;
    transform: none;
  }

  .image-container:hover {
    transform: scale(1.02);
  }
}

@media (max-width: 480px) {
  .hero-main {
    padding: 1rem;
    gap: 1.5rem;
    max-width: 100vw;
    overflow-x: hidden;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .hero-tagline {
    font-size: 0.95rem;
  }

  .image-container {
    max-width: 300px;
  }

  .tech-circle:nth-child(1) {
    width: 40px;
    height: 40px;
  }

  .tech-circle:nth-child(2) {
    width: 30px;
    height: 30px;
  }

  .tech-circle:nth-child(3) {
    width: 50px;
    height: 50px;
  }
} /* Button Components */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 1rem 2rem;
  font-size: 1.1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, #00d4ff, #0099cc);
  color: #fff;
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(0, 212, 255, 0.5);
}

.btn-secondary {
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.1),
    rgba(255, 255, 255, 0.05)
  );
  color: #fff;
  border: 2px solid rgba(0, 212, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: linear-gradient(
    135deg,
    rgba(0, 212, 255, 0.2),
    rgba(0, 212, 255, 0.1)
  );
  border-color: rgba(0, 212, 255, 0.6);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.2);
}

.btn i {
  font-size: 0.9rem;
  transition: transform 0.3s ease;
}

.btn:hover i {
  transform: translateX(3px);
}

/* Service Cards */
.service-card {
  background: rgba(255, 255, 255, 0.05);
  padding: 2.5rem;
  border-radius: 20px;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}

.service-card:hover {
  transform: translateY(-10px);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.12);
}

.service-icon {
  font-size: 3rem;
  color: #00d4ff;
  margin-bottom: 1.5rem;
}

.service-card h3 {
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 1rem;
  font-weight: 600;
}

.service-card p {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

/* Stats */
.stats {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
}

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

.stat-item h4 {
  font-size: 2.5rem;
  color: #00d4ff;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.stat-item p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1rem;
  margin: 0;
}

/* AI Visualization */
.ai-visualization {
  position: relative;
  width: 300px;
  height: 300px;
}

.ai-nodes {
  position: relative;
  width: 100%;
  height: 100%;
}

.node {
  position: absolute;
  width: 20px;
  height: 20px;
  background: linear-gradient(45deg, #00d4ff, #0099cc);
  border-radius: 50%;
  animation: nodePulse 2s ease-in-out infinite;
}

.node:nth-child(1) {
  top: 20%;
  left: 20%;
  animation-delay: 0s;
}

.node:nth-child(2) {
  top: 20%;
  right: 20%;
  animation-delay: 0.4s;
}

.node:nth-child(3) {
  bottom: 20%;
  left: 20%;
  animation-delay: 0.8s;
}

.node:nth-child(4) {
  bottom: 20%;
  right: 20%;
  animation-delay: 1.2s;
}

.node:nth-child(5) {
  top: 50%;
  left: 50%;
  animation-delay: 1.6s;
}

/* Responsive Components */
@media (max-width: 768px) {
  .btn {
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
  }

  .service-card {
    padding: 2rem;
  }

  .stats {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .btn {
    padding: 0.7rem 1.2rem;
    font-size: 0.9rem;
  }

  .service-card {
    padding: 2rem;
  }

  .stats {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
} /* About Section */
.about {
  background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 100%);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-text h3 {
  font-size: 2.5rem;
  color: #fff;
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.about-text p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 2rem;
}

.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Services Section */
.services {
  background: #0a0a0a;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

/* Team Section */
.team {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

.team-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-top: 0;
}

.team-description h3 {
  font-size: 2.5rem;
  color: #fff;
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.team-description p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.team-description strong {
  color: #00d4ff;
}

.team-features {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: rgba(255, 255, 255, 0.8);
}

.feature-item i {
  color: #00d4ff;
  font-size: 1.2rem;
}

.team-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* University Showcase */
.university-showcase {
  position: relative;
  height: 380px;
  perspective: 1000px;
}

.showcase-container {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
}

.university-card {
  width: 180px;
  height: 300px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.8s ease;
  cursor: pointer;
}

.university-card:nth-child(1) {
  transform: rotateY(-8deg) translateZ(10px);
  z-index: 3;
}

.university-card:nth-child(2) {
  transform: translateZ(40px);
  z-index: 4;
}

.university-card:nth-child(3) {
  transform: rotateY(8deg) translateZ(10px);
  z-index: 3;
}

.university-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  animation: cardFloat 6s ease-in-out infinite;
}

.university-card:nth-child(1)::before {
  animation-delay: 0s;
}

.university-card:nth-child(2)::before {
  animation-delay: 2s;
}

.university-card:nth-child(3)::before {
  animation-delay: 4s;
}

.university-card .card-inner {
  animation: cardFloat 6s ease-in-out infinite;
}

.university-card:nth-child(1) .card-inner {
  animation-delay: 0s;
}

.university-card:nth-child(2) .card-inner {
  animation-delay: 2s;
}

.university-card:nth-child(3) .card-inner {
  animation-delay: 4s;
}

.university-card:hover {
  transform: rotateY(0deg) translateZ(150px) scale(1.1);
  z-index: 10;
  filter: drop-shadow(0 20px 40px rgba(0, 212, 255, 0.3));
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.6s ease, filter 0.3s ease;
}

.university-card:hover .card-inner {
  transform: rotateY(180deg);
  animation: cardGlow 0.6s ease-out;
}

.card-front,
.card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 20px;
  padding: 1.5rem 1.2rem 1.2rem 1.2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  box-sizing: border-box;
}

.card-front {
  background: linear-gradient(
    135deg,
    rgba(0, 212, 255, 0.15),
    rgba(0, 153, 204, 0.08)
  );
  border: 1px solid rgba(0, 212, 255, 0.3);
  backdrop-filter: blur(15px);
}

.card-back {
  background: linear-gradient(
    135deg,
    rgba(0, 212, 255, 0.15),
    rgba(0, 153, 204, 0.1)
  );
  border: 1px solid rgba(0, 212, 255, 0.3);
  backdrop-filter: blur(15px);
  transform: rotateY(180deg);
  justify-content: center;
}

.university-logo {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  margin-bottom: 1rem;
  margin-top: 0.5rem;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  border: 3px solid rgba(0, 212, 255, 0.3);
  overflow: hidden;
  flex-shrink: 0;
  position: relative;
}

.university-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.3s ease;
  border-radius: 50%;
  position: absolute;
  top: 0;
  left: 0;
}

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

.card-front h4,
.card-back h4 {
  color: #fff;
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  text-align: center;
}

.university-tag {
  color: rgba(0, 212, 255, 0.9);
  font-size: 0.72rem;
  font-weight: 500;
  margin: 0.2rem 0;
  line-height: 1.2;
  text-align: center;
}

.university-stats {
  display: flex;
  gap: 1.5rem;
  margin: 1.5rem 0;
  justify-content: center;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  color: #00d4ff;
  font-size: 1.2rem;
  font-weight: 700;
}

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

.card-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  padding: 0.5rem;
}

.card-content p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.85rem;
  line-height: 1.4;
  margin: 0;
  text-align: center;
}

.showcase-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}

.floating-particles {
  position: absolute;
  width: 100%;
  height: 100%;
}

/* Contact Section */
.contact {
  background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 100%);
  color: #fff;
  padding: 4rem 0;
  padding-top: 120px;
}

.contact .section-header h2 {
  color: #fff;
}

.contact .section-header h2::after {
  background: var(--primary);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.contact-info h3 {
  font-size: 1.8rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.contact-info p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: rgba(255, 255, 255, 0.9);
}

.contact-method i {
  color: var(--primary);
  font-size: 1.2rem;
  width: 20px;
  text-align: center;
}

/* Link Styles */
a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: #00d4ff;
}

/* Footer */
.footer {
  background: #000;
  padding: 3rem 0 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
  color: #fff;
  margin-bottom: 1rem;
}

.footer-section p,
.footer-section ul li {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  margin-top: 2rem;
  color: rgba(255, 255, 255, 0.7);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.footer-bottom p {
  margin: 0;
}

.footer-bottom a {
  margin-left: 10px;
  color: rgba(255, 255, 255, 0.7);
}

/* Responsive Sections */
@media (max-width: 768px) {
  .about-content,
  .team-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .team-visual {
    min-width: 0;
  }

  .about-visual {
    display: none;
  }

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

  .section-header h2 {
    font-size: 2rem;
  }

  .about-text h3,
  .team-description h3,
  .contact-info h3 {
    font-size: 2rem;
  }

  .team-description p {
    word-wrap: break-word;
    word-break: normal;
    white-space: normal;
    overflow-wrap: break-word;
    max-width: 100%;
    width: 100%;
  }

  .team-description {
    max-width: 100%;
    width: 100%;
    overflow-wrap: break-word;
  }

  .container {
    padding: 0 15px;
    max-width: calc(100vw - 30px);
  }

  section {
    padding: 40px 0;
    padding-top: 100px;
    overflow-x: hidden;
  }

  img {
    max-width: 100%;
    height: auto;
  }
  .footer-bottom {
    flex-direction: column;
    justify-content: center;
    gap: 1rem;
  }

  .footer-bottom a {
    margin-left: 0;
  }

  .university-showcase {
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-top: 20px; /* Add space for float animation */
    padding-bottom: 2rem;
    margin-bottom: 2rem;
    height: 320px;
  }

  .university-showcase::-webkit-scrollbar {
    display: none;
  }
}

@media (max-width: 480px) {
  .university-showcase {
    padding-top: 20px; /* Provide vertical space for float animation */
    padding-bottom: 10px; /* Provide vertical space for float animation */
    overflow-x: hidden;
    width: 100%;
  }

  .showcase-container {
    gap: 0.8rem;
    justify-content: space-around;
    padding: 0 1rem;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }

  .university-card {
    width: 120px;
    height: 220px;
    flex-shrink: 0;
  }

  .university-logo {
    width: 70px;
    height: 70px;
    margin-bottom: 0.5rem;
    margin-top: 0.3rem;
    padding: 0;
    overflow: hidden;
  }

  .card-front,
  .card-back {
    padding: 1rem 0.8rem 0.8rem 0.8rem;
    box-sizing: border-box;
  }

  .card-front h4,
  .card-back h4 {
    font-size: 0.95rem;
    margin-bottom: 0.4rem;
    line-height: 1.2;
  }

  .university-tag {
    font-size: 0.65rem;
    line-height: 1.2;
    margin: 0.2rem 0;
  }

  .university-stats {
    gap: 0.5rem;
    margin: 0.5rem 0;
  }

  .stat-number {
    font-size: 0.9rem;
  }

  .stat-label {
    font-size: 0.55rem;
  }

  .card-content p {
    font-size: 0.72rem;
    line-height: 1.3;
    word-wrap: break-word;
    word-break: normal;
    white-space: normal;
    hyphens: auto;
    overflow-wrap: break-word;
  }

  .university-showcase::-webkit-scrollbar {
    display: none;
  }

  .team-description p {
    word-wrap: break-word;
    word-break: normal;
    white-space: normal;
    overflow-wrap: break-word;
    max-width: 100%;
    width: 100%;
  }

  .team-description {
    max-width: 100%;
    width: 100%;
    overflow-wrap: break-word;
  }
} /* Case Studies Carousel */
.cases {
  background: linear-gradient(180deg, #fdfdff 0%, #f5f7fa 100%);
  padding: 4rem 0;
  padding-top: 120px;
}

.cases .section-header h2,
.cases .section-header p {
  color: #333;
}

.carousel-container {
  max-width: 900px;
  margin: 2rem auto;
  position: relative;
}

.carousel {
  overflow: hidden;
  border-radius: 15px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
  position: relative;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s ease-in-out;
}

.carousel-slide {
  flex: 0 0 100%;
  position: relative;
  overflow: hidden;
  background-color: #e0e0e0;
  padding-top: 60%; /* 5:3 aspect ratio */
}

.carousel-slide img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.slide-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.5rem 2rem;
  color: #fff;
  z-index: 2;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, transparent 100%);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.slide-content h3 {
  color: #fff;
  margin-bottom: 0.5rem;
  font-size: 1.4rem;
}

.slide-content p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* 桌面端默认样式 */
.carousel-controls {
  position: absolute;
  top: 50%;
  left: 1rem;
  right: 1rem;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  z-index: 10;
  pointer-events: none;
}

.carousel-btn {
  pointer-events: auto;
  background: rgba(0, 0, 0, 0.3);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  justify-content: center;
  align-items: center;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.carousel-btn:hover {
  background: rgba(0, 0, 0, 0.6);
  transform: scale(1.05);
}

.carousel-indicators {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
  padding: 0;
  margin: 0;
}

.indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ccc;
  cursor: pointer;
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.indicator.active {
  background: var(--primary);
  transform: scale(1.1);
}

.indicator:hover {
  background: #adadad;
}

@media (min-width: 769px) {
  .carousel-container {
    padding: 0 50px;
  }

  .carousel-controls {
    left: 0;
    right: 0;
  }

  .carousel-slide:hover img {
    transform: scale(1.05);
  }

  .slide-content {
    opacity: 0;
    transform: translateY(15px);
  }

  .carousel-slide.active .slide-content,
  .carousel-slide:hover .slide-content {
    opacity: 1;
    transform: translateY(0);
  }

  .carousel-indicators {
    position: relative;
    bottom: auto;
    left: auto;
    transform: none;
    margin-top: 1.5rem;
    justify-content: center;
  }
}

/* Mobile Carousel Styles */
@media (max-width: 768px) {
  .cases {
    padding: 2.5rem 0;
    padding-top: 100px;
  }

  .carousel-container {
    padding: 0;
    margin: 0 auto;
    max-width: 100%;
  }

  .carousel {
    border-radius: 0;
    box-shadow: none;
    margin: 0;
  }

  .carousel-slide {
    padding-top: 62.5%; /* 16:10 aspect ratio for mobile */
  }

  .slide-content {
    opacity: 1;
    transform: none;
    padding: 1rem 1.2rem;
  }

  .slide-content h3 {
    font-size: 1.1rem;
  }

  .slide-content p {
    font-size: 0.85rem;
  }

  .carousel-controls {
    position: static;
    transform: none;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
    background: #f5f7fa;
    width: 100%;
  }

  .carousel-btn {
    display: none;
  }

  .carousel-indicators {
    position: static;
    transform: none;
    padding: 0;
    margin: 0;
    width: auto;
    display: flex;
    justify-content: center;
    gap: 10px;
  }

  .indicator {
    width: 9px;
    height: 9px;
    background: #ccc;
  }

  .indicator.active {
    background: var(--primary);
    transform: none;
  }
} /* Form Styles */
.contact-form {
  background: rgba(255, 255, 255, 0.05);
  padding: 2.5rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  color: #fff;
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-group select {
  width: 100%;
  padding: 0.8rem 1rem;
  background: #1a1a1a;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  color: #fff;
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: #00d4ff;
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}


.form-group select option {
  background: #1a1a1a !important;
  color: #fff !important;
}

.form-group select option:hover {
  background: #444 !important;
  color: #00d4ff !important;
}

/* 表单反馈样式 */
.form-feedback {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: #00d4ff;
  min-height: 1.5em;
}

.form-feedback.error {
  color: #e53e3e;
}

/* 只在有error类时显示红色边框 */
.form-group.error input,
.form-group.error select,
.form-group.error textarea {
  border: 1.5px solid #e53e3e;
}

.form-group.error input:focus,
.form-group.error select:focus,
.form-group.error textarea:focus {
  outline: none;
  border-color: #e53e3e;
  box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.1);
} /* Animation Keyframes */
@keyframes float-orbs {
  0%,
  100% {
    transform: translateY(0px) translateX(0px) scale(1);
    opacity: 0.5;
  }
  25% {
    transform: translateY(-30px) translateX(20px) scale(1.1);
    opacity: 0.8;
  }
  50% {
    transform: translateY(-15px) translateX(-15px) scale(0.9);
    opacity: 0.6;
  }
  75% {
    transform: translateY(25px) translateX(10px) scale(1.05);
    opacity: 0.7;
  }
}

@keyframes backgroundShift {
  0%,
  100% {
    transform: rotate(0deg) scale(1);
  }
  25% {
    transform: rotate(1deg) scale(1.02);
  }
  50% {
    transform: rotate(0deg) scale(1.05);
  }
  75% {
    transform: rotate(-1deg) scale(1.02);
  }
}

@keyframes neuralMove {
  0% {
    transform: translateX(0) translateY(0);
  }
  25% {
    transform: translateX(10px) translateY(-15px);
  }
  50% {
    transform: translateX(-5px) translateY(10px);
  }
  75% {
    transform: translateX(15px) translateY(5px);
  }
  100% {
    transform: translateX(0) translateY(0);
  }
}

@keyframes neuralPulse {
  0%,
  100% {
    opacity: 0.4;
    filter: blur(0px);
  }
  25% {
    opacity: 0.8;
    filter: blur(1px);
  }
  50% {
    opacity: 0.9;
    filter: blur(0px);
  }
  75% {
    opacity: 0.6;
    filter: blur(0.5px);
  }
}

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

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

@keyframes scrollBounce {
  0%,
  100% {
    transform: translateY(0);
    opacity: 1;
  }
  50% {
    transform: translateY(10px);
    opacity: 0.5;
  }
}

@keyframes techPulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.2);
    opacity: 0.8;
  }
}

@keyframes nodePulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.7;
  }
  50% {
    transform: scale(1.5);
    opacity: 1;
  }
}

@keyframes cardFloat {
  0%,
  100% {
    transform: translateY(0px);
  }
  33% {
    transform: translateY(-10px);
  }
  66% {
    transform: translateY(5px);
  }
}

@keyframes cardGlow {
  0% {
    box-shadow: 0 0 0 rgba(0, 212, 255, 0.3);
  }
  50% {
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.6);
  }
  100% {
    box-shadow: 0 0 0 rgba(0, 212, 255, 0.3);
  }
}

@keyframes connectionPulse {
  0%,
  100% {
    opacity: 0.2;
  }
  25% {
    opacity: 0.8;
  }
  50% {
    opacity: 1;
  }
  75% {
    opacity: 0.6;
  }
}