/* ===== 关于我们页专属样式（about.html，配合 style.css + policy.css 使用） ===== */

/* 覆盖长文页的滚动吸附，避免阅读被打断 */
main.ab-main { scroll-snap-type: none; }
main.ab-main > section { scroll-snap-align: none; scroll-margin-top: 88px; }

/* ---------- 关键数字条 ---------- */
.ab-quick {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  margin: 0 0 8px;
}
.ab-quick div {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 18px; text-align: center;
}
.ab-quick b {
  display: block; font-size: 30px; line-height: 1.2; color: var(--blue);
  font-variant-numeric: tabular-nums; font-weight: 800;
}
.ab-quick span { display: block; font-size: 13px; color: var(--gray); margin-top: 6px; }

/* ---------- 两栏布局 ---------- */
.ab-split { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.ab-split .doc-h3 { margin-top: 0; }

/* ---------- 时间轴 ---------- */
.ab-timeline { margin: 0; padding: 0; list-style: none; position: relative; }
.ab-timeline::before {
  content: ""; position: absolute; left: 78px; top: 6px; bottom: 6px;
  width: 2px; background: linear-gradient(180deg, #d6e2f2, #eef3fa);
}
.ab-timeline li {
  position: relative; display: flex; gap: 22px; margin-bottom: 22px; align-items: flex-start;
}
.ab-timeline li:last-child { margin-bottom: 0; }
.ab-timeline .yr {
  flex: none; width: 58px; text-align: right; font-size: 15px; font-weight: 800;
  color: var(--blue); line-height: 1.7; font-variant-numeric: tabular-nums;
}
.ab-timeline .yr::after {
  content: ""; position: absolute; left: 71px; top: 9px;
  width: 11px; height: 11px; border-radius: 50%;
  background: #fff; border: 2.5px solid var(--blue-2);
}
.ab-timeline .tx { padding-left: 26px; font-size: 14.5px; line-height: 1.8; color: #3d4249; }
.ab-timeline .tx b { display: block; color: var(--ink); font-size: 15px; margin-bottom: 3px; }

/* ---------- 四层授权 ---------- */
.ab-auth { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 0 0 18px; }
.ab-auth div {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 20px; position: relative; padding-left: 56px;
}
.ab-auth div::before {
  content: counter(auth); counter-increment: auth;
  position: absolute; left: 18px; top: 18px;
  width: 24px; height: 24px; border-radius: 7px;
  background: var(--blue-soft); color: var(--blue-2);
  font-size: 13px; font-weight: 800; line-height: 24px; text-align: center;
}
.ab-auth { counter-reset: auth; }
.ab-auth b { display: block; font-size: 15px; color: var(--ink); margin-bottom: 4px; }
.ab-auth span { font-size: 13.5px; color: var(--gray); line-height: 1.7; }

/* ---------- 联系方式卡 ---------- */
.ab-contact {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 4px;
}
.ab-contact div {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px;
}
.ab-contact small { display: block; font-size: 12px; color: var(--gray-2); letter-spacing: .05em; margin-bottom: 6px; }
.ab-contact b { font-size: 16px; color: var(--ink); line-height: 1.6; }
.ab-contact a { color: var(--blue); font-size: 20px; font-weight: 700; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .ab-quick { grid-template-columns: repeat(2, 1fr); }
  .ab-split { grid-template-columns: 1fr; gap: 8px; }
  .ab-contact { grid-template-columns: 1fr; }
  .ab-auth { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .ab-quick b { font-size: 24px; }
  .ab-quick div { padding: 15px 12px; }
  .ab-timeline::before { left: 54px; }
  .ab-timeline .yr { width: 40px; font-size: 13.5px; }
  .ab-timeline .yr::after { left: 48px; }
  .ab-timeline .tx { padding-left: 16px; }
}