/* about.html · 关于我们 */

.about-page {
  padding: 100px 0 20px;
  background: var(--surface);
}

.about-page .container.sidebar-layout::before,
.about-page .container.sidebar-layout::after {
  display: none;
  content: none;
}

.about-page .sidebar-layout {
  display: flex;
  align-items: flex-start;
  gap: 88px;
}

.about-page .sidebar {
  position: sticky;
  top: 108px;
  flex: none;
  width: 300px;
  padding: 12px 40px 0 0;
}

.about-page .sidebar__breadcrumb {
  font-size: 13px;
  color: var(--text-3);
  margin: 0 0 32px;
  letter-spacing: .02em;
}

.about-page .sidebar__breadcrumb a {
  color: var(--text-2);
}

.about-page .sidebar__breadcrumb a:hover { color: var(--brand) }

.about-page .sidebar__title {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(34px, 3.8vw, 44px);
  color: var(--text);
  margin: 0 0 24px;
  letter-spacing: -.03em;
  line-height: 1.15;
}

.about-page .sidebar__intro {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-2);
  margin: 0;
  max-width: 260px;
}

.about-page .sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.about-page .sidebar__nav a {
  display: block;
  padding: 14px 0 14px 20px;
  font-size: 15px;
  color: var(--text-2);
  border-left: 3px solid transparent;
  transition: color .15s, border-color .15s, padding-left .15s;
}

.about-page .sidebar__nav a:hover {
  color: var(--text);
  padding-left: 24px;
}

.about-page .sidebar__nav a.active {
  color: var(--brand);
  border-left-color: var(--brand);
  font-weight: 600;
  padding-left: 24px;
}

.about-page .main-content {
  flex: 1;
  min-width: 0;
}

.about-page .content-section {
  scroll-margin-top: 96px;
  padding-bottom: 64px;
  margin-bottom: 64px;
  border-bottom: 1px solid var(--border);
}

.about-page .content-section:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.about-page .content-section__header {
  margin-bottom: 28px;
}

.about-page .content-section__header h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 22px;
  color: var(--text);
  margin: 0 0 8px;
}

.about-page .content-section__header p {
  font-size: 14px;
  color: var(--text-3);
  margin: 0;
}

.about-cover {
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 32px;
  border: 1px solid var(--border);
}

.about-cover img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  object-position: center center;
  display: block;
}

.about-company h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 20px;
  color: var(--text);
  margin: 0 0 16px;
}

.about-company p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-2);
  margin: 0 0 16px;
}

.about-company p:last-of-type { margin-bottom: 0 }

.about-scope {
  margin-top: 28px;
  padding: 20px 24px;
  background: var(--surface-2);
  border-radius: 10px;
  border: 1px solid var(--border);
}

.about-scope h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 12px;
}

.about-scope ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 24px;
}

.about-scope li {
  font-size: 14px;
  color: var(--text-2);
  padding-left: 14px;
  position: relative;
}

.about-scope li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--brand);
}

.about-metrics {
  display: flex;
  margin-top: 32px;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--surface);
}

.about-metrics__item {
  flex: 1;
  text-align: center;
  padding: 24px 16px;
  border-right: 1px solid var(--border);
}

.about-metrics__item:last-child { border-right: 0 }

.about-metrics__item strong {
  display: block;
  font-family: var(--display);
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  margin-bottom: 6px;
}

.about-metrics__item span {
  font-size: 13px;
  color: var(--text-3);
}

.about-qual-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--surface);
}

.about-qual-item {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 20px;
  align-items: start;
  padding: 22px 24px;
  border-bottom: 1px solid var(--border);
}

.about-qual-item:last-child { border-bottom: 0 }

.about-qual-item__tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  text-align: center;
  line-height: 1.3;
}

.about-qual-item__body h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 6px;
}

.about-qual-item__body p {
  font-size: 14px;
  color: var(--text-2);
  margin: 0;
  line-height: 1.6;
}

.about-contact-list {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--surface);
}

.about-contact-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  border-bottom: 1px solid var(--border);
}

.about-contact-row:last-child { border-bottom: 0 }

.about-contact-row dt {
  padding: 18px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  background: var(--surface-2);
  margin: 0;
  border-right: 1px solid var(--border);
}

.about-contact-row dd {
  padding: 18px 24px;
  font-size: 14px;
  color: var(--text-2);
  margin: 0;
  line-height: 1.6;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.about-contact-row dd a {
  color: var(--brand);
  font-size: 13px;
}

.about-contact-row dd a:hover { text-decoration: underline }

@media (max-width: 900px) {
  .about-page .sidebar-layout {
    flex-direction: column;
    gap: 36px;
  }

  .about-page .sidebar {
    position: static;
    width: auto;
    padding: 0 0 32px;
    border-bottom: 1px solid var(--border);
  }

  .about-page .sidebar__title {
    font-size: 32px;
    margin-bottom: 16px;
  }

  .about-page .sidebar__intro {
    max-width: none;
  }

  .about-page .sidebar__nav {
    margin-top: 28px;
    padding-top: 24px;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
  }

  .about-page .sidebar__nav a {
    padding: 8px 16px;
    border-left: 0;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface-2);
  }

  .about-page .sidebar__nav a.active {
    background: var(--brand);
    color: #fff;
    border-color: var(--brand);
    padding-left: 16px;
  }

  .about-scope ul { grid-template-columns: 1fr }
  .about-qual-item { grid-template-columns: 1fr; gap: 10px }
}

@media (max-width: 600px) {
  .about-page { padding: 55px 0 20px }
  .about-metrics { flex-direction: column }
  .about-metrics__item {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
  .about-metrics__item:last-child { border-bottom: 0 }
  .about-contact-row { grid-template-columns: 1fr }
  .about-contact-row dt { border-right: 0; border-bottom: 1px solid var(--border) }
}