/* 二级导航 */
.sub-nav {
  background: #fff;
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.sub-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.sub-nav-list {
  display: flex;
  justify-content: center;
  list-style: none;
  margin: 0;
  padding: 0;
}
.sub-nav-item {
  position: relative;
}
.sub-nav-link {
  display: block;
  padding: 20px 36px;
  font-size: 16px;
  color: #555;
  text-decoration: none;
  transition: color 0.3s;
  font-weight: 500;
}
.sub-nav-link:hover {
  color: #009ac6;
}
.sub-nav-item.active .sub-nav-link {
  color: #009ac6;
}
.sub-nav-item.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 3px;
  background: #009ac6;
  border-radius: 2px;
}

/* 通用section */
.section {
  padding: 80px 0;
}
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-head h2 {
  font-size: 36px;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 12px;
}
.section-head p {
  font-size: 16px;
  color: #888;
  margin: 0;
}
.section-head-line {
  width: 50px;
  height: 3px;
  background: #009ac6;
  margin: 16px auto 0;
  border-radius: 2px;
}

/* 研发创新介绍 */
.rd-intro {
  background: #f8fafc;
}
.rd-intro-text {
  max-width: 1300px;
  margin: 0 auto 48px;
  text-align: center;
}
.rd-intro-text p {
  font-size: 16px;
  line-height: 1.9;
  color: #555;
  margin: 0;
  text-align: left;
}

/* 数据统计 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 1300px;
  margin: 0 auto;
}
.stat-card {
  background: #fff;
  border-radius: 12px;
  padding: 36px 20px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  transition: transform 0.3s, box-shadow 0.3s;
}
.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,102,204,0.12);
}
.stat-number {
  font-size: 42px;
  font-weight: 700;
  color: #009ac6;
  line-height: 1;
  margin-bottom: 10px;
}
.stat-number .unit {
  font-size: 24px;
}

.stat-number .iconfont{font-size:40px;color:#353535;}
.stat-label {
  font-size: 17px;
  color: #666;
  /*margin: 0;*/
}

.mg_b_20{margin-bottom:20px;}

/* 左右图文布局 */
.feature-section {
  padding: 80px 0;
}
.feature-section.alt {
  background: #f8fafc;
}
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.feature-text h3 {
  font-size: 28px;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 28px;
  position: relative;
  display: inline-block;
  padding-bottom: 12px;
}
.feature-text h3::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 2em;
  height: 3px;
  background: linear-gradient(90deg, #009ac6 0%, #00a0ff 50%, #66ccff 100%);
  border-radius: 2px;
}
.feature-text p {
  font-size: 15px;
  line-height: 1.9;
  color: #555;
  margin-bottom: 16px;
  text-indent: 2em;
}
.feature-text p:last-child {
  margin-bottom: 0;
}
.feature-image {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
  position: relative;
}
.feature-image .swiper {
  width: 100%;
  height: 360px;
}
.feature-image .swiper-slide img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  display: block;
}
/* 轮播切换按钮 - 蓝色背景白色icon */
.feature-image .swiper-nav-btn {
  position: absolute;
  bottom: 16px;
  width: 40px;
  height: 40px;
  background: #009ac6;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  cursor: pointer;
  z-index: 10;
  transition: background 0.3s, transform 0.2s;
  border: none;
  padding: 0;
}
.feature-image .swiper-nav-btn:hover {
  background: #0052a3;
  transform: scale(1.05);
}
.feature-image .swiper-nav-btn:active {
  transform: scale(0.95);
}
.feature-image .swiper-nav-btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: #fff;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
/* 图片在左侧时（alt section），按钮靠右下角（靠近文字侧） */
.feature-section.alt .feature-image .swiper-nav-prev {
  right: 64px;
}
.feature-section.alt .feature-image .swiper-nav-next {
  right: 16px;
}
/* 图片在右侧时，按钮靠左下角（靠近文字侧） */
.feature-section:not(.alt) .feature-image .swiper-nav-prev {
  left: 16px;
}
.feature-section:not(.alt) .feature-image .swiper-nav-next {
  left: 64px;
}
/* 轮播分页器 */
.feature-image .swiper-pagination {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
}
.feature-image .swiper-pagination .swiper-pagination-bullet {
  width: 8px;
  height: 8px;
  background: rgba(255,255,255,0.5);
  opacity: 1;
  transition: all 0.3s;
}
.feature-image .swiper-pagination .swiper-pagination-bullet-active {
  background: #fff;
  width: 24px;
  border-radius: 4px;
}

/* 研发成果特殊样式 */
.achievement-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.achievement-item {
  /*display: flex;*/
  /*align-items: flex-start;*/
  /*gap: 16px;*/
  padding: 20px 0;
  border-bottom: 1px solid #eee;
}
.achievement-item:last-child {
  border-bottom: none;
}
.achievement-icon {
  flex-shrink: 0;
  width: 100%;
  height: 48px;
  /*background: linear-gradient(135deg, #009ac6, #0099ff);*/
  /*border-radius: 10px;*/
  /*display: flex;*/
  /*align-items: center;*/
  /*justify-content: center;*/

  font-weight: 700;
  font-size: 42px;
color: #009ac6;
line-height: 1;
margin-bottom: 10px;
}
.achievement-icon .unit{color: #1a2733;font-size:24px;}
.achievement-content h4 {
  font-size: 18px;
  font-weight: 600;
  color: #1a1a2e;
  margin: 0 0 6px;
}
.achievement-content p {
  font-size: 14px;
  color: #777;
  margin: 0;
  line-height: 1.7;
}
.yx_qc p{margin-bottom:0px;}

/* 愿景区域 */
.vision {
  position: relative;
  height: 400px;
  overflow: hidden;
}
.vision-bg {
  position: absolute;
  inset: 0;
}
.vision-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.vision-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,30,60,0.8) 0%, rgba(0,80,160,0.6) 100%);
}
.vision-content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.vision-title {
  font-size: 40px;
  font-weight: 700;
  color: #fff;
  line-height: 1.5;
  letter-spacing: 3px;
  margin: 0;
}

/* 响应式 */
@media (max-width: 768px) {
  .page-banner { height: 320px; }
  .page-banner-title { font-size: 32px; }
  .page-banner-subtitle { font-size: 16px; }
  .sub-nav-link { padding: 14px 16px; font-size: 14px; }
  .section { padding: 50px 0; }
  .section-head h2 { font-size: 26px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-card { padding: 24px 12px; }
  .stat-number { font-size: 32px; }
  .feature-grid { grid-template-columns: 1fr; gap: 32px; }
  .feature-text h3 { font-size: 22px; }
  .feature-image .swiper,
  .feature-image .swiper-slide img { height: 260px; }
  .feature-image .swiper-nav-btn { width: 34px; height: 34px; bottom: 12px; }
  .feature-section.alt .feature-image .swiper-nav-prev { right: 54px; }
  .feature-section.alt .feature-image .swiper-nav-next { right: 12px; }
  .feature-section:not(.alt) .feature-image .swiper-nav-prev { left: 12px; }
  .feature-section:not(.alt) .feature-image .swiper-nav-next { left: 54px; }
  .vision { height: 280px; }
  .vision-title { font-size: 26px; }
}



.yc_by{width:100%;height:auto;padding:0px 0px 30px 0px;text-align:center;font-size:25px;font-weight:700;color:#0b56a9;}

.yc_by span{padding:0px 25px;}