/* 全局样式 */
:root {
  --primary-color: #1890ff;
  --secondary-color: #722ed1;
  --text-color: #333;
  --text-light: #666;
  --bg-color: #fff;
  --bg-light: #f5f7ff;
  --border-radius: 8px;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  --transition: all 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-color);
  line-height: 1.6;
  background-color: var(--bg-color);
}

h1,
h2,
h3,
h4 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-light);
}

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

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

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
}

section {
  padding: 4rem 0;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn.primary {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
}

.btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3);
}

.btn.secondary {
  background-color: white;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

.btn.secondary:hover {
  background-color: var(--bg-light);
  transform: translateY(-2px);
}

.btn.large {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

/* 英雄区域 */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 80vh;
  background-color: var(--bg-light);
  padding: 4rem 0;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-video {
  position: absolute;
  top: 50%;
  left: 50%;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);
  object-fit: cover;
  z-index: 0;
  opacity: 0.3;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(245, 247, 255, 0.8), rgba(255, 255, 255, 0.6));
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 2rem;
  max-width: 800px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
  line-height: 1.3;
}

.subtitle {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  -webkit-grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  align-items: stretch;
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.125rem;
  line-height: 1.6;
}

.subtitle-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 8px;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: var(--transition);
  -webkit-transition: var(--transition);
  animation: fadeInUp 0.6s ease-out backwards;
  -webkit-animation: fadeInUp 0.6s ease-out backwards;
  text-align: left;
  justify-content: flex-start;
}

.subtitle-item:nth-child(1) {
  animation-delay: 0.1s;
}

.subtitle-item:nth-child(2) {
  animation-delay: 0.2s;
}

.subtitle-item:nth-child(3) {
  animation-delay: 0.3s;
}

.subtitle-item:nth-child(4) {
  animation-delay: 0.4s;
}

.subtitle-item:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: translateX(5px);
  -webkit-transform: translateX(5px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.subtitle-item i {
  color: var(--primary-color);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.subtitle-item span {
  color: var(--text-color);
  font-weight: 500;
  text-align: left;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
    -webkit-transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
    -webkit-transform: translateY(0);
  }
}

@-webkit-keyframes fadeInUp {
  from {
    opacity: 0;
    -webkit-transform: translateY(20px);
  }

  to {
    opacity: 1;
    -webkit-transform: translateY(0);
  }
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  justify-content: center;
  /* 按钮居中 */
}

/* 核心价值 */
.core-values {
  background-color: var(--bg-color);
}

.core-values h2 {
  text-align: center;
  margin-bottom: 1rem;
  font-size: 2rem;
}

.values-subtitle {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-light);
  margin-bottom: 3rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.value-card {
  background-color: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  text-align: center;
}

.value-card:hover {
  transform: translateY(-5px);
}

.value-card i {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.value-card h3 {
  margin-bottom: 1rem;
}

/* 服务流程 */
.workflow {
  background-color: var(--bg-light);
}

.workflow h2 {
  text-align: center;
  margin-bottom: 3rem;
  font-size: 2rem;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border-radius: 50%;
  font-weight: bold;
  flex-shrink: 0;
}

.step-content {
  background-color: white;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  flex-grow: 1;
}

/* 客户案例 */
.case-studies h2 {
  text-align: center;
  margin-bottom: 3rem;
  font-size: 2rem;
}

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

.case-card {
  background-color: white;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.case-card:hover {
  transform: translateY(-5px);
}

.case-content {
  padding: 1.5rem;
}

.case-content h3 {
  margin-bottom: 0.5rem;
}

.stats {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.stats i {
  color: var(--primary-color);
}

/* 行动号召 */
.cta-section {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 4rem 0;
  text-align: center;
}

.cta-section h2 {
  margin-bottom: 1rem;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 2rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding: 4rem 0;
  }

  .hero-video {
    opacity: 0.2;
  }

  .hero-overlay {
    background: linear-gradient(135deg, rgba(245, 247, 255, 0.9), rgba(255, 255, 255, 0.8));
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-content {
    padding-right: 0;
    margin-bottom: 2rem;
  }

  .subtitle {
    grid-template-columns: 1fr;
    -webkit-grid-template-columns: 1fr;
    font-size: 1rem;
    gap: 0.75rem;
  }

  .subtitle-item {
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
  }

  .subtitle-item i {
    font-size: 1.125rem;
  }

  .values-subtitle {
    font-size: 1rem;
    padding: 0 1rem;
  }

  .values-grid {
    grid-template-columns: 1fr;
    padding: 0 1rem;
  }

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

  .step {
    flex-direction: column;
  }

  .step-content {
    width: 100%;
  }
}