/* 关于我们页面组样式，作用域限定在 body.page-about .tf-about，复用首页设计变量。 */
body.page-about {
  background: #f5f8fc;
  color: var(--tf-ink, #15243a);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

body.page-about .tf-about,
body.page-about .tf-about *,
body.page-about .tf-about *::before,
body.page-about .tf-about *::after {
  box-sizing: border-box;
}

body.page-about .tf-about {
  line-height: 1.7;
}

body.page-about .tf-about a {
  color: inherit;
  text-decoration: none;
}

body.page-about .tf-about .container {
  width: min(calc(100% - 48px), 1120px);
  max-width: 1120px !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
}

/* 顶部横幅 */
.tf-about-hero {
  background:
    radial-gradient(circle at 82% 18%, rgba(19, 185, 197, .16), transparent 38%),
    linear-gradient(120deg, #071d37 0%, #0c2d50 58%, #10406e 100%);
  color: #eaf2fb;
  padding: 56px 0 52px;
}

.tf-about-hero .tf-eyebrow {
  display: block;
  margin-bottom: 10px;
  color: #6fc4ff;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .18em;
}

.tf-about-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 800;
  letter-spacing: -.5px;
  color: #fff;
}

.tf-about-hero p {
  margin: 0;
  max-width: 720px;
  color: rgba(234, 242, 251, .78);
  font-size: 15px;
}

/* 页签导航 */
.tf-about-tabs {
  position: sticky;
  top: 0;
  z-index: 90;
  background: #fff;
  border-bottom: 1px solid var(--tf-border, #e6edf5);
  box-shadow: 0 4px 14px rgba(20, 55, 96, .04);
}

.tf-about-tabs .container {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.tf-about-tabs .container::-webkit-scrollbar {
  display: none;
}

.tf-about-tabs a {
  flex: 0 0 auto;
  padding: 14px 16px;
  color: var(--tf-muted, #6c7b91);
  font-size: 14px;
  border-bottom: 2px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.tf-about-tabs a:hover {
  color: var(--tf-blue, #1677ff);
}

.tf-about-tabs a.active {
  color: var(--tf-blue, #1677ff);
  font-weight: 700;
  border-bottom-color: var(--tf-blue, #1677ff);
}

/* 内容区块 */
.tf-about-body {
  padding: 48px 0 72px;
}

.tf-about-section {
  margin-bottom: 48px;
}

.tf-about-section:last-child {
  margin-bottom: 0;
}

.tf-about-section > h2 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 800;
  color: var(--tf-ink, #15243a);
  letter-spacing: -.3px;
}

.tf-about-section > .tf-about-section-desc {
  margin: 0 0 24px;
  color: var(--tf-muted, #6c7b91);
  font-size: 14px;
}

.tf-about-card {
  background: #fff;
  border: 1px solid var(--tf-border, #e6edf5);
  border-radius: var(--tf-radius, 14px);
  box-shadow: var(--tf-shadow, 0 16px 42px rgba(20, 55, 96, .08));
  padding: 28px 30px;
}

.tf-about-prose p {
  margin: 0 0 14px;
  color: #3c4c63;
  font-size: 15px;
}

.tf-about-prose p:last-child {
  margin-bottom: 0;
}

/* 数据条 */
.tf-about-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.tf-about-stat {
  border: 1px solid var(--tf-border, #e6edf5);
  border-radius: 12px;
  background: var(--tf-surface, #f5f8fc);
  padding: 18px 20px;
}

.tf-about-stat strong {
  display: block;
  margin-bottom: 4px;
  color: var(--tf-blue, #1677ff);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -.5px;
}

.tf-about-stat span {
  color: var(--tf-muted, #6c7b91);
  font-size: 13px;
}

/* 通用卡片栅格 */
.tf-about-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.tf-about-grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tf-about-item {
  display: block;
  background: #fff;
  border: 1px solid var(--tf-border, #e6edf5);
  border-radius: 12px;
  padding: 22px 24px;
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

a.tf-about-item:hover {
  border-color: rgba(22, 119, 255, .35);
  box-shadow: 0 12px 28px rgba(22, 119, 255, .1);
  transform: translateY(-2px);
}

.tf-about-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--tf-ink, #15243a);
}

.tf-about-item p {
  margin: 0;
  color: var(--tf-muted, #6c7b91);
  font-size: 13.5px;
  line-height: 1.75;
}

.tf-about-item .tf-about-item-more {
  display: inline-block;
  margin-top: 12px;
  color: var(--tf-blue, #1677ff);
  font-size: 13px;
  font-weight: 700;
}

/* 发展历程时间轴 */
.tf-about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.tf-about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, #bcd8ff, #e6edf5);
}

.tf-about-timeline li {
  position: relative;
  padding: 0 0 30px;
}

.tf-about-timeline li:last-child {
  padding-bottom: 0;
}

.tf-about-timeline li::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--tf-blue, #1677ff);
}

.tf-about-timeline .tf-about-year {
  display: inline-block;
  margin-bottom: 6px;
  color: var(--tf-blue, #1677ff);
  font-size: 18px;
  font-weight: 800;
}

.tf-about-timeline h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--tf-ink, #15243a);
}

.tf-about-timeline p {
  margin: 0;
  color: var(--tf-muted, #6c7b91);
  font-size: 14px;
}

/* 资质卡片 */
.tf-about-cert {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.tf-about-cert-badge {
  flex: 0 0 52px;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(22, 119, 255, .12), rgba(19, 185, 197, .14));
  color: var(--tf-blue, #1677ff);
  font-size: 22px;
  font-weight: 800;
}

.tf-about-cert-no {
  display: inline-block;
  margin-top: 10px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--tf-surface, #f5f8fc);
  border: 1px solid var(--tf-border, #e6edf5);
  color: var(--tf-navy-soft, #0c2d50);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .02em;
}

/* 新闻/公告列表 */
.tf-about-list {
  display: grid;
  gap: 14px;
}

.tf-about-list-item {
  background: #fff;
  border: 1px solid var(--tf-border, #e6edf5);
  border-radius: 12px;
  padding: 22px 26px;
}

.tf-about-list-item .tf-about-list-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  color: var(--tf-muted, #6c7b91);
  font-size: 12.5px;
}

.tf-about-list-item .tf-about-list-tag {
  padding: 2px 9px;
  border-radius: 999px;
  background: rgba(22, 119, 255, .08);
  color: var(--tf-blue, #1677ff);
  font-size: 12px;
  font-weight: 700;
}

.tf-about-list-item h3 {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--tf-ink, #15243a);
}

.tf-about-list-item .tf-about-list-body {
  margin: 0;
  color: #45566f;
  font-size: 14px;
  line-height: 1.85;
  white-space: normal;
}

.tf-about-empty {
  padding: 56px 0;
  text-align: center;
  color: var(--tf-muted, #6c7b91);
  font-size: 14px;
  background: #fff;
  border: 1px dashed #cfdcea;
  border-radius: 12px;
}

/* 招聘 */
.tf-about-job {
  background: #fff;
  border: 1px solid var(--tf-border, #e6edf5);
  border-radius: 12px;
  padding: 24px 28px;
}

.tf-about-job + .tf-about-job {
  margin-top: 14px;
}

.tf-about-job-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.tf-about-job-head h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
}

.tf-about-job-head .tf-about-job-meta {
  color: var(--tf-muted, #6c7b91);
  font-size: 13px;
}

.tf-about-job h4 {
  margin: 14px 0 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--tf-navy-soft, #0c2d50);
}

.tf-about-job ul {
  margin: 0;
  padding-left: 18px;
  color: #45566f;
  font-size: 14px;
}

.tf-about-job li {
  margin-bottom: 4px;
}

/* 联系我们 */
.tf-about-contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.tf-about-contact-value {
  display: block;
  margin-top: 6px;
  color: var(--tf-ink, #15243a);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -.3px;
}

.tf-about-contact-note {
  margin-top: 6px;
  color: var(--tf-muted, #6c7b91);
  font-size: 13px;
}

@media (max-width: 900px) {
  .tf-about-grid,
  .tf-about-grid--2,
  .tf-about-contact-grid {
    grid-template-columns: 1fr;
  }

  .tf-about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tf-about-card {
    padding: 22px 20px;
  }
}

@media (max-width: 520px) {
  .tf-about-hero {
    padding: 40px 0 36px;
  }

  .tf-about-stats {
    grid-template-columns: 1fr;
  }
}