/* ================================================================
   主营业务页 Hero（全屏背景图）
================================================================ */
.biz-hero {
  min-height: 600px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.biz-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.biz-hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 48px;
  position: relative;
  z-index: 2;
  width: 100%;
}
.biz-hero h1 {
  font-size: 44px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 14px;
}
.biz-hero p {
  font-size: 15px;
  color: var(--text-gray);
  line-height: 1.9;
  max-width: 520px;
}

/* ================================================================
   系统集成：列表区
================================================================ */
.biz-list-section {
  padding: 72px 0 40px;
  background: #fff;
}

/* Tab 导航（锚点） */
.biz-list-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 52px;
  justify-content: center;
  box-shadow: 0px 23px 23px 1px rgba(41, 69, 126, 0.05);
  border-radius: 0px 0px 0px 0px;
}
.biz-list-tab {
  display: block;
  padding: 12px 24px;
  font-size: 14px;
  color: #666;
  cursor: pointer;
  position: relative;
  transition: color 0.2s;
  white-space: nowrap;
}
.biz-list-tab::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--blue);
  transform: scaleX(0);
  transition: transform 0.22s;
}
.biz-list-tab.active,
.biz-list-tab:hover {
  color: var(--blue);
}
.biz-list-tab.active::after {
  transform: scaleX(1);
}

/* 每行业务条目（图左文右） */
.biz-item {
  display: flex;
  gap: 48px;
  align-items: center;
  padding: 48px 0;
  border-bottom: 1px solid #f0f0f0;
}
.biz-item:last-child {
  border-bottom: none;
}

.biz-item-img {
  flex: 0 0 44%;
  height: 280px;
  overflow: hidden;
}
.biz-item-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.biz-item:hover .biz-item-img img {
  transform: scale(1.05);
}

.biz-item-body {
  flex: 1;
}

.biz-item-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}
.biz-item-desc {
  font-size: 14px;
  color: var(--text-gray);
  line-height: 1.9;
  margin-bottom: 16px;
}

/* 特性点阵（圆点 + 文字，2~3列） */
.biz-feat-grid {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 10px 28px;
  margin-top: 16px;
}
.biz-feat {
  font-size: 13px;
  color: #555;
  display: flex;
  align-items: center;
  gap: 8px;
}
.biz-feat::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
  flex-shrink: 0;
}

/* 旧版 tag 样式保留兼容 */
.biz-item-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}
.biz-tag {
  font-size: 12px;
  color: var(--blue);
  border: 1px solid rgba(26, 94, 232, 0.25);
  padding: 4px 12px;
  border-radius: 12px;
  background: #f0f5ff;
}

/* ================================================================
   软件平台开发（dark banner）
================================================================ */
.biz-dark-banner {
  height: 400px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.biz-dark-banner > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.biz-dark-banner::after {
  content: '';
  position: absolute;
  inset: 0;
}
.biz-dark-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 48px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.biz-dark-left h2 {
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}
.biz-dark-left .en {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.biz-dark-left p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.9;
  max-width: 420px;
  margin-bottom: 24px;
}
.biz-dark-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.5);
  padding: 11px 26px;
  border-radius: 3px;
  font-size: 14px;
  transition:
    background 0.22s,
    gap 0.2s;
}
.biz-dark-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  gap: 14px;
}

.biz-dark-right {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.timeline {
  position: relative;
}
.timeline::before {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: #fff;
}

.timeline-item {
  position: relative;
  text-align: right;
  padding-right: 15px;
  padding-bottom: 40px;
  font-size: 11px;
  color: #fff;
}
.timeline-item:last-child {
  padding-bottom: 0;
}
.timeline-item::before {
  content: '';
  position: absolute;
  right: -6px;
  right: -2px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #fff;
}
.timeline-item:first-child::before {
  top: 0;
}
.timeline-item:last-child::before {
  bottom: 0;
  top: auto;
}
.timeline-item:nth-child(n + 2):nth-last-child(n + 2)::before {
  top: 4%;
}

.biz-dark-tag-title {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 2px;
  margin-bottom: 4px;
}
.biz-dark-tag {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.75);
  padding: 8px 20px;
  border-radius: 4px;
  font-size: 13px;
  text-align: center;
  cursor: pointer;
  transition: background 0.2s;
}
.biz-dark-tag:hover {
  background: rgba(255, 255, 255, 0.16);
}

/* ================================================================
   数据分析应用
================================================================ */
.biz-data-section {
  padding: 80px 0;
  background: #fff;
}
.biz-data-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 48px;
  display: flex;
  gap: 60px;
  align-items: center;
}
.biz-data-left {
  flex: 0 0 420px;
}
.biz-data-left h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}
.biz-data-left .en {
  font-size: 12px;
  color: #ccc;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin: 8px 0 18px;
}
.biz-data-left p {
  font-size: 14px;
  color: var(--text-gray);
  line-height: 1.9;
}
.biz-data-cards {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.biz-data-card {
  background: var(--blue);
  color: #fff;
  padding: 22px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition:
    background 0.2s,
    transform 0.2s;
}
.biz-data-card:hover {
  background: var(--blue-d);
  transform: translateY(-3px);
}

/* ================================================================
   三维数字服务
================================================================ */
.biz-3d-section {
  padding: 80px 0;
  background: var(--bg-gray);
}
.biz-3d-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.biz-3d-card {
  background: #fff;
  padding: 32px 24px 10px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  transition:
    transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.35s;
  position: relative;
}
.biz-3d-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 14px 44px rgba(26, 94, 232, 0.12);
}
.biz-3d-icon {
  width: 140px;
  height: 140px;
  margin-left: auto;
}
.biz-3d-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.biz-3d-desc {
  font-size: 13px;
  color: var(--text-gray);
  line-height: 1.9;
  margin-top: 30px;
}