/* 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);
}

section {
  padding: 4rem 0;
}

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

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

/* 关于我们英雄区域 */
.about-hero {
  background: linear-gradient(135deg, var(--bg-light), rgba(255, 255, 255, 0.8));
  padding: 6rem 0 4rem;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.about-hero h1 {
  font-size: 3rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-light);
  margin-bottom: 0;
}

/* 时间线容器 */
.about-timeline {
  padding: 4rem 0;
  background-color: var(--bg-color);
  position: relative;
}

.timeline-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  padding: 2rem 0;
}

.timeline-wrapper::before {
  content: '';
  position: absolute;
  left: 40px;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
  z-index: 1;
}

/* 时间线项 */
.timeline-item {
  position: relative;
  margin-bottom: 4rem;
  display: flex;
  align-items: flex-start;
  z-index: 2;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

/* 时间线标记 */
.timeline-marker {
  position: absolute;
  left: 40px;
  transform: translateX(-50%);
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(24, 144, 255, 0.3);
  z-index: 3;
  transition: var(--transition);
}

.timeline-marker:hover {
  transform: translateX(-50%) scale(1.1);
  box-shadow: 0 6px 30px rgba(24, 144, 255, 0.5);
}

.timeline-marker i {
  font-size: 2rem;
  color: white;
}

.timeline-marker svg {
  width: 2rem;
  height: 2rem;
  fill: white;
}

/* 时间线内容 */
.timeline-content {
  width: calc(100% - 120px);
  margin-left: 120px;
  padding: 2rem;
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  border: 1px solid rgba(24, 144, 255, 0.1);
  transition: var(--transition);
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  border-color: rgba(24, 144, 255, 0.3);
}

/* 统一标题样式 */
.timeline-content h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* 文本样式 */
.intro-text,
.mission-text,
.compliance-text,
.vision-text {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-color);
  text-align: justify;
  margin-bottom: 0;
}

/* 核心能力 */
.capabilities-list {
  margin-top: 1.5rem;
}

.capability-item {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 2rem;
  padding: 0;
}

.capability-item:last-child {
  margin-bottom: 0;
}

.capability-icon {
  flex-shrink: 0;
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-top: 0.25rem;
}

.capability-icon svg {
  width: 1.5rem;
  height: 1.5rem;
  fill: var(--primary-color);
}

.capability-content {
  flex: 1;
}

.capability-content h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-color);
  font-weight: 600;
}

.capability-content p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 0;
  font-size: 1rem;
}


/* 联系我们 */
.about-contact {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  padding: 3rem 0;
  text-align: center;
}

.contact-text {
  font-size: 1.25rem;
  color: white;
  margin-bottom: 0;
}

.contact-link {
  color: white;
  font-weight: 600;
  text-decoration: underline;
  margin-left: 0.5rem;
}

.contact-link:hover {
  color: rgba(255, 255, 255, 0.8);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .about-hero h1 {
    font-size: 2rem;
  }

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

  /* 时间线响应式 */
  .timeline-wrapper::before {
    left: 25px;
  }

  .timeline-item {
    margin-bottom: 3rem;
  }

  .timeline-marker {
    left: 25px;
    width: 50px;
    height: 50px;
    transform: translateX(-50%);
  }

  .timeline-marker:hover {
    transform: translateX(-50%) scale(1.1);
  }

  .timeline-marker i {
    font-size: 1.25rem;
  }

  .timeline-marker svg {
    width: 1.25rem;
    height: 1.25rem;
  }

  .timeline-content {
    width: calc(100% - 80px);
    margin-left: 80px !important;
    padding: 1.5rem;
  }

  .timeline-content h2 {
    font-size: 1.75rem;
  }

  .capability-item {
    gap: 1rem;
    margin-bottom: 1.5rem;
  }

  .capability-icon {
    font-size: 1.25rem;
  }

  .capability-content h3 {
    font-size: 1.125rem;
  }

  .capability-content p {
    font-size: 0.9rem;
  }

  .intro-text,
  .mission-text,
  .compliance-text,
  .vision-text {
    font-size: 1rem;
    text-align: left;
  }

  .contact-text {
    font-size: 1rem;
  }
}