/* 关于我们banner */
.about-banner {
  height: 300px;
  background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  position: relative;
}
.about-banner::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url("../img/about-banner-bg.png") center center no-repeat;
  background-size: cover;
  opacity: 0.1;
}
.about-banner .container {
  text-align: center;
  z-index: 1;
  position: relative;
}
.about-banner h1 {
  font-size: 42px;
  margin-bottom: 15px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.about-banner p {
  font-size: 18px;
  opacity: 0.9;
}
/* 公司简介 */
.company-intro {
  padding: 60px 0;
}
.intro-content {
  display: flex;
  gap: 50px;
  align-items: center;
}
.intro-img {
  width: 40%;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
.intro-img img {
  width: 100%;
  height: auto;
  transition: transform 0.5s;
}
.intro-img:hover img {
  transform: scale(1.03);
}
.intro-text {
  width: 60%;
}
.intro-text p {
  font-size: 16px;
  color: #333;
  line-height: 1.8;
  margin-bottom: 20px;
}
/* 核心优势 */
.core-advantages {
  background-color: #f9fcff;
  padding: 80px 0;
}
.advantages-list {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 30px;
}
.advantage-item {
  width: calc(25% - 20px);
  background-color: #fff;
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  transition: transform 0.3s, box-shadow 0.3s;
}
.advantage-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}
.icon-box {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: #fff;
  font-size: 30px;
}
.advantage-item h3 {
  font-size: 20px;
  margin-bottom: 15px;
  color: #222;
}
.advantage-item p {
  font-size: 14px;
  color: #666;
  line-height: 1.6;
}
/* 发展历程 */
.development-history {
  padding: 80px 0;
}
.timeline {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}
.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, #6a11cb 0%, #2575fc 100%);
  border-radius: 2px;
}
.timeline-item {
  margin-bottom: 60px;
  position: relative;
  width: 50%;
  box-sizing: border-box;
}
.timeline-item:nth-child(odd) {
  padding-right: 40px;
  text-align: right;
  float: left;
}
.timeline-item:nth-child(even) {
  padding-left: 40px;
  float: right;
}
.timeline-date {
  font-size: 24px;
  font-weight: bold;
  color: #6a11cb;
  margin-bottom: 10px;
}
.timeline-content {
  background-color: #fff;
  padding: 25px;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}
.timeline-content h3 {
  font-size: 18px;
  margin-bottom: 10px;
  color : #222;
}
.timeline-content p {
  font-size: 14px;
  color: #666;
  line-height: 1.6;
}
/* 时间线节点装饰 */
.timeline-item::after {
  content: "";
  position: absolute;
  top: 10px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
  border: 4px solid #f9fcff;
  z-index: 1;
}
.timeline-item:nth-child(odd)::after {
  right: -10px;
}
.timeline-item:nth-child(even)::after {
  left: -10px;
}
/* 清除浮动 */
.development-history::after {
  content: "";
  display: table;
  clear: both;
}
/* 响应式适配 */
@media (max-width: 768px) {
  .intro-content {
    flex-direction: column;
  }
  .intro-img, .intro-text {
    width: 100%;
  }
  .advantage-item {
    width: calc(50% - 15px);
  }
  .timeline::before {
    left: 30px;
  }
  .timeline-item {
    width: 100%;
    padding-left: 70px !important;
    padding-right: 0 !important;
    text-align: left !important;
    float: none !important;
  }
  .timeline-item::after {
    left: 20px !important;
  }
}