/* ==========================================================================
   关于我们
   ========================================================================== */
.about-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  gap: 46px;
  align-items: center;
}
.about-intro-text h2 { font-size: 28px; color: var(--ink-900); margin-bottom: 18px; }
.about-intro-text p { font-size: 15px; line-height: 1.9; color: var(--ink-500); margin-bottom: 14px; }
.about-tags { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.about-stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }

/* 时间轴 */
.timeline { position: relative; padding-left: 0; }
.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, transparent, var(--brand-200) 8%, var(--brand-200) 92%, transparent);
}
.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 44px 34px 0;
  box-sizing: border-box;
}
.timeline-item:nth-child(even) { margin-left: 50%; padding: 0 0 34px 44px; }
.timeline-item::after {
  content: "";
  position: absolute;
  top: 6px;
  right: -7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--brand-500);
}
.timeline-item:nth-child(even)::after { left: -7px; right: auto; }
.timeline-year {
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}
.timeline-content {
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
}
.timeline-content h4 { font-size: 16px; color: var(--ink-900); margin-bottom: 8px; }
.timeline-content p { font-size: 14px; line-height: 1.8; color: var(--ink-500); }

/* 荣誉 / 案例 */
.honor-list,
.partner-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}
.honor-item,
.partner-item {
  padding: 26px 22px;
  text-align: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: transform .22s ease, box-shadow .22s ease;
}
.honor-item:hover,
.partner-item:hover { transform: translateY(-4px); box-shadow: var(--card-shadow-hover); }
.honor-item > i,
.honor-item img { height: 64px; line-height: 64px; object-fit: contain; margin-bottom: 14px; }
.honor-item p { font-size: 14px; color: var(--ink-700); }
.partner-item > i,
.partner-item img { height: 46px; line-height: 46px; object-fit: contain; margin-bottom: 14px; }
.partner-item h4 { font-size: 16px; color: var(--ink-900); margin-bottom: 8px; }
.partner-item p { font-size: 13px; line-height: 1.7; color: var(--ink-500); }

/* 联系引导 */
.about-contact { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.about-contact-box {
  padding: 30px 24px;
  text-align: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}
.about-contact-box i { font-size: 30px; color: var(--brand-600); }
.about-contact-box p { margin-top: 12px; font-size: 15px; color: var(--ink-700); }

@media (max-width: 1080px) {
  .honor-list,
  .partner-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 992px) {
  .about-intro { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .about-contact { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 768px) {
  .timeline::before { left: 9px; }
  .timeline-item,
  .timeline-item:nth-child(even) {
    width: 100%;
    margin-left: 0;
    padding: 0 0 24px 34px;
  }
  .timeline-item::after,
  .timeline-item:nth-child(even)::after { left: 3px; right: auto; }
  .honor-list,
  .partner-list { grid-template-columns: minmax(0, 1fr); }
}