/* 全局样式 */
:root {
  --primary-color: #6C5CE7;
  --secondary-color: #00E6D6;
  --accent-color: #FFD700;
  --dark-gray: #2D3436;
  --medium-gray: #636E72;
  --light-gray: #B2BEC3;
  --white: #FFFFFF;
  --black: #000000;
  --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  --gradient-secondary: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 15px 35px rgba(0, 0, 0, 0.2);
  --border-radius: 12px;
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  color: var(--dark-gray);
  background-color: var(--white);
  overflow-x: hidden;
}

/* 排版 */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--dark-gray);
}

h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1rem;
  color: var(--medium-gray);
}

/* 容器 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 12px 30px;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

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

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

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

.btn-secondary:hover {
  background: var(--primary-color);
  color: var(--white);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition);
  padding: 20px 0;
}

.navbar.scrolled {
  background-color: var(--white);
  box-shadow: var(--shadow);
  padding: 15px 0;
}

.navbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: 'Montserrat', sans-serif;
}

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

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-links a {
  text-decoration: none;
  color: var(--dark-gray);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
}

.contact-btn {
  margin-left: 20px;
}

/* 英雄区域 */
.hero {
  padding: 150px 0 100px;
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.05), rgba(0, 230, 214, 0.05));
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%236C5CE7" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>') repeat;
  opacity: 0.5;
  z-index: 0;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text h1 {
  font-size: 4rem;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

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

.hero-text p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  color: var(--medium-gray);
}

.hero-buttons {
  display: flex;
  gap: 20px;
}

.hero-visual {
  position: relative;
}

.ai-visual {
  position: relative;
  padding: 20px;
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.ai-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, rgba(108, 92, 231, 0.1), rgba(0, 230, 214, 0.1));
  z-index: 0;
}

.video-frame {
  position: relative;
  z-index: 1;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.video-frame img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition);
}

.video-frame:hover img {
  transform: scale(1.05);
}

/* 通用章节样式 */
.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-header h2 {
  position: relative;
  display: inline-block;
  margin-bottom: 1rem;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--medium-gray);
  max-width: 600px;
  margin: 0 auto;
}

/* 服务概览 */
.services-overview {
  padding: 100px 0;
  background: var(--white);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.service-card {
  background: var(--white);
  padding: 40px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-primary);
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
}

.service-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(0, 230, 214, 0.1));
  border-radius: 50%;
  color: var(--primary-color);
  transition: var(--transition);
}

.service-card:hover .service-icon {
  background: var(--gradient-primary);
  color: var(--white);
  transform: scale(1.1);
}

.service-link {
  display: inline-block;
  margin-top: 20px;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  position: relative;
}

.service-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.service-link:hover::after {
  transform: scaleX(1);
}

/* 案例概览 */
.portfolio-overview {
  padding: 100px 0;
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.05), rgba(0, 230, 214, 0.05));
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.portfolio-item {
  background: var(--white);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.portfolio-item:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
}

.portfolio-image {
  position: relative;
  overflow: hidden;
  height: 250px;
}

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

.portfolio-item:hover .portfolio-image img {
  transform: scale(1.1);
}

.portfolio-content {
  padding: 30px;
}

.portfolio-content h3 {
  margin-bottom: 10px;
  color: var(--dark-gray);
}

.portfolio-content p {
  margin-bottom: 20px;
  color: var(--medium-gray);
}

/* AI能力概览 */
.ai-capabilities-overview {
  padding: 100px 0;
  background: var(--white);
}

.ai-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.ai-feature {
  background: var(--white);
  padding: 40px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
  position: relative;
}

.ai-feature::before {
  content: '';
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  box-shadow: var(--shadow);
}

.ai-feature-icon {
  margin-bottom: 30px;
  position: relative;
  z-index: 1;
}

.ai-feature:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
}

/* 客户评价 */
.testimonials {
  padding: 100px 0;
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.05), rgba(0, 230, 214, 0.05));
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.testimonial-item {
  background: var(--white);
  padding: 40px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
}

.testimonial-item:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
}

.testimonial-item::before {
  content: '"';
  position: absolute;
  top: 20px;
  left: 30px;
  font-size: 4rem;
  color: rgba(108, 92, 231, 0.1);
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
}

.testimonial-content p {
  font-style: italic;
  margin-bottom: 30px;
  color: var(--medium-gray);
  line-height: 1.7;
}

.testimonial-author {
  display: flex;
  align-items: center;
}

.author-info h4 {
  margin-bottom: 5px;
  color: var(--dark-gray);
}

.author-info p {
  margin-bottom: 0;
  color: var(--light-gray);
  font-size: 0.9rem;
}

/* 行动召唤 */
.cta {
  padding: 100px 0;
  background: var(--gradient-primary);
  text-align: center;
  color: var(--white);
}

.cta h2 {
  color: var(--white);
  margin-bottom: 1rem;
}

.cta p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 2rem;
  font-size: 1.1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta .btn {
  background: var(--white);
  color: var(--primary-color);
  font-weight: 600;
}

.cta .btn:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: translateY(-3px);
}

/* 页脚 */
.footer {
  background: var(--dark-gray);
  color: var(--white);
  padding: 80px 0 40px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  margin-bottom: 20px;
}

.footer-logo .logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 10px;
  display: block;
}

.footer-logo p {
  color: var(--light-gray);
  margin-bottom: 0;
}

.footer-links h4,
.footer-contact h4,
.footer-social h4 {
  margin-bottom: 20px;
  color: var(--white);
  font-size: 1.1rem;
}

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

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul li a {
  color: var(--light-gray);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links ul li a:hover {
  color: var(--secondary-color);
  padding-left: 5px;
}

.footer-contact p {
  color: var(--light-gray);
  margin-bottom: 10px;
}

.social-links {
  display: flex;
  gap: 15px;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  transition: var(--transition);
  text-decoration: none;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 40px;
  text-align: center;
  color: var(--light-gray);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text h1 {
    font-size: 2.5rem;
  }

  .hero-buttons {
    justify-content: center;
  }

  .nav-links {
    display: none;
  }

  h2 {
    font-size: 2rem;
  }

  .services-grid,
  .portfolio-grid,
  .ai-features,
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .social-links {
    justify-content: center;
  }
}

@media (max-width: 992px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-buttons {
    justify-content: center;
  }

  .services-grid,
  .portfolio-grid,
  .ai-features,
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f1f1;
}

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

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

/* 加载动画 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(108, 92, 231, 0.3);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* 工具类 */
.text-center {
  text-align: center;
}

.mt-1 {
  margin-top: 0.5rem;
}

.mt-2 {
  margin-top: 1rem;
}

.mt-3 {
  margin-top: 1.5rem;
}

.mb-1 {
  margin-bottom: 0.5rem;
}

.mb-2 {
  margin-bottom: 1rem;
}

.mb-3 {
  margin-bottom: 1.5rem;
}

.py-1 {
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

.py-2 {
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.py-3 {
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

.py-4 {
  padding-top: 2rem;
  padding-bottom: 2rem;
}

.py-5 {
  padding-top: 3rem;
  padding-bottom: 3rem;
}