/* ===== 回访服务介绍页 · page-about ===== */

.page-about {
  --about-rule: 1px solid rgba(43, 58, 85, .55);
  --about-rule-ink: 1px solid rgba(23, 18, 14, .16);
  --about-top: 108px;
  --about-lead: rgba(169, 198, 255, .86);
  --about-body: rgba(255, 255, 255, .68);
  --about-ink-body: rgba(23, 18, 14, .74);
}

@media (min-width: 900px) {
  .page-about { --about-top: 92px; }
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--about-top) + 8px);
  padding-bottom: 0;
  border-bottom: 1px solid var(--grid);
  background-image:
    linear-gradient(to right, rgba(43, 58, 85, .30) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(43, 58, 85, .30) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: center top;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -180px;
  right: -140px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(31, 107, 255, .30) 0%, rgba(31, 107, 255, 0) 70%);
  pointer-events: none;
}

.page-about .about-hero .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-crumb {
  margin-bottom: 26px;
  font-size: 12px;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 48px;
  }
}

.page-about .about-hero-index {
  border-left: 2px solid var(--orange);
  padding-left: 16px;
}

.page-about .about-index-label {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--haze);
}

.page-about .about-index {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index-link {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  align-items: baseline;
  gap: 10px;
  padding: 10px 6px 10px 0;
  border-bottom: 1px solid rgba(43, 58, 85, .65);
  color: var(--blue-soft);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-index-link:hover,
.page-about .about-index-link:focus-visible {
  color: #fff;
  border-bottom-color: var(--orange);
}

.page-about .about-index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange);
  letter-spacing: .06em;
}

.page-about .about-kicker {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-title {
  margin: 0 0 18px;
  font-size: clamp(30px, 6.6vw, 54px);
  line-height: 1.1;
  letter-spacing: -.02em;
  font-weight: 800;
  color: #fff;
}

.page-about .about-lead {
  margin: 0 0 26px;
  max-width: 46em;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--about-lead);
}

@media (min-width: 900px) {
  .page-about .about-lead { font-size: 18px; }
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}

.page-about .about-shot {
  margin: 0;
  border: 1px solid var(--grid);
  background: var(--ink-2);
}

.page-about .about-shot img {
  display: block;
  width: 100%;
  height: 190px;
  object-fit: cover;
}

@media (min-width: 700px) {
  .page-about .about-shot img { height: 240px; }
}

.page-about .about-shot-cap {
  padding: 12px 14px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--haze);
  border-top: 1px solid var(--grid);
}

/* 首屏三张重登方式横带 */

.page-about .about-strip-frame {
  position: relative;
  z-index: 1;
  margin-top: 40px;
}

.page-about .about-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--grid);
  border-top: 1px solid var(--grid);
}

@media (min-width: 760px) {
  .page-about .about-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.page-about .about-strip-card {
  position: relative;
  background: var(--ink);
  padding: 22px 20px 26px 24px;
  display: grid;
  gap: 6px;
  align-content: start;
  transition: background var(--dur) var(--ease);
}

.page-about .about-strip-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
}

.page-about .about-strip-card--blue::before { background: var(--blue); }
.page-about .about-strip-card--orange::before { background: var(--orange); }
.page-about .about-strip-card--mint::before { background: var(--mint); }

.page-about .about-strip-card:hover { background: var(--ink-3); }

.page-about .about-strip-num {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--haze);
}

.page-about .about-strip-name {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: #fff;
}

.page-about .about-strip-time {
  margin: 0;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-about .about-strip-card--mint .about-strip-time { color: var(--mint); }
.page-about .about-strip-card--blue .about-strip-time { color: var(--blue-soft); }

.page-about .about-strip-desc {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-body);
}

/* ---------- 通用区块头 ---------- */

.page-about .about-head {
  max-width: 62em;
}

.page-about .about-head--dark .section-title { color: #fff; }
.page-about .about-head--dark .section-note { color: var(--about-body); }

/* ---------- 01 三项支持 ---------- */

.page-about .about-service { color: var(--brown); }

.page-about .about-support {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: 36px;
  border-top: var(--about-rule-ink);
}

.page-about .about-support-card {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 26px 0 28px;
  border-bottom: var(--about-rule-ink);
}

@media (min-width: 820px) {
  .page-about .about-support {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 36px;
  }
  .page-about .about-support-card { padding: 30px 0 34px; }
}

.page-about .about-support-num {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--orange);
}

.page-about .about-support-title {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-about .about-support-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-ink-body);
}

.page-about .about-audience {
  margin-top: 36px;
  padding-top: 24px;
  border-top: var(--about-rule-ink);
}

.page-about .about-audience-label {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(23, 18, 14, .5);
}

.page-about .about-audience-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

@media (min-width: 760px) {
  .page-about .about-audience-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 40px; }
}

.page-about .about-audience-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-ink-body);
}

.page-about .about-audience-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 2px;
  background: var(--orange);
}

.page-about .about-audience-list a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 107, 255, .4);
}

.page-about .about-audience-list a:hover { border-bottom-color: var(--blue); }

/* ---------- 02 三条重登路径 ---------- */

.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
}

.page-about .about-filter-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  padding: 9px 14px;
  border: 1px solid var(--grid);
  background: transparent;
  color: var(--blue-soft);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-filter-btn:hover,
.page-about .about-filter-btn:focus-visible {
  border-color: var(--orange);
  color: #fff;
}

.page-about .about-filter-btn[aria-pressed="true"] {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

.page-about .about-filter-count {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--haze);
}

.page-about .about-modes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 24px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

@media (min-width: 860px) {
  .page-about .about-modes { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.page-about .about-mode {
  display: grid;
  gap: 12px;
  align-content: start;
  background: var(--ink-2);
  padding: 26px 22px 30px;
  border-top: 3px solid transparent;
  transition: background var(--dur) var(--ease);
}

.page-about .about-mode:hover { background: var(--ink-3); }

.page-about .about-mode--blue { border-top-color: var(--blue); }
.page-about .about-mode--orange { border-top-color: var(--orange); }
.page-about .about-mode--mint { border-top-color: var(--mint); }

.page-about .about-mode-num {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--haze);
}

.page-about .about-mode-name {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
}

.page-about .about-mode-time {
  margin: 0;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-about .about-mode--blue .about-mode-time { color: var(--blue-soft); }
.page-about .about-mode--mint .about-mode-time { color: var(--mint); }

.page-about .about-mode-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
  border-top: 1px solid var(--grid);
  padding-top: 16px;
}

.page-about .about-mode-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-body);
}

.page-about .about-mode-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 1px;
  background: var(--haze);
}

.page-about .about-mode-note {
  margin: 0;
  padding: 12px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--haze);
  background: rgba(255, 182, 40, .07);
  border-left: 2px solid var(--amber);
}

.page-about .about-map {
  margin: 40px 0 0;
  border: 1px solid var(--grid);
}

.page-about .about-map img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-map-cap {
  padding: 12px 16px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--haze);
  border-top: 1px solid var(--grid);
}

/* ---------- 03 登录安全 ---------- */

.page-about .about-security { color: var(--brown); }

.page-about .about-security-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 34px;
}

@media (min-width: 900px) {
  .page-about .about-security-grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 44px;
  }
}

.page-about .about-locks {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--about-rule-ink);
}

.page-about .about-lock {
  padding: 22px 0 24px;
  border-bottom: var(--about-rule-ink);
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  column-gap: 12px;
}

.page-about .about-lock-num {
  grid-row: 1 / span 2;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--orange);
  padding-top: 4px;
}

.page-about .about-lock-title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
}

.page-about .about-lock-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-ink-body);
}

.page-about .about-note-panel {
  align-self: start;
  background: var(--brown);
  color: var(--cream);
  padding: 26px 24px 28px;
  border-top: 3px solid var(--mint);
}

.page-about .about-note-label {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-about .about-note-big {
  margin: 0 0 12px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .about-note-num {
  font-family: var(--font-mono);
  font-size: clamp(40px, 9vw, 56px);
  font-weight: 700;
  line-height: 1;
  color: #fff;
}

.page-about .about-note-unit {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--mint);
}

.page-about .about-note-text {
  margin: 0 0 18px;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(245, 240, 230, .72);
}

.page-about .about-note-link {
  display: inline-block;
  font-size: 13.5px;
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 211, 160, .5);
  padding-bottom: 2px;
}

.page-about .about-note-link:hover { border-bottom-color: var(--mint); }

/* ---------- 04 团队仪表板 ---------- */

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 34px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

@media (min-width: 900px) {
  .page-about .about-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.page-about .about-metric {
  background: var(--ink);
  padding: 22px 20px 20px;
  display: grid;
  gap: 2px;
  align-content: start;
  transition: background var(--dur) var(--ease);
}

.page-about .about-metric:hover { background: var(--ink-3); }

.page-about .about-metric-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 7vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: #fff;
  display: flex;
  align-items: baseline;
  gap: 3px;
}

.page-about .about-metric-unit {
  font-size: 14px;
  color: var(--orange);
  letter-spacing: .04em;
}

.page-about .about-metric-label {
  margin: 8px 0 0;
  font-size: 13.5px;
  letter-spacing: .02em;
  color: var(--blue-soft);
}

.page-about .about-metric-hint {
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--haze);
  max-height: 10em;
  opacity: 1;
  overflow: hidden;
  transition: max-height .3s var(--ease), opacity .3s var(--ease);
}

@media (min-width: 900px) {
  .page-about .about-metric-hint {
    max-height: 0;
    opacity: 0;
  }
  .page-about .about-metric:hover .about-metric-hint,
  .page-about .about-metric:focus-within .about-metric-hint {
    max-height: 10em;
    opacity: 1;
  }
}

.page-about .about-team-foot {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--grid);
}

@media (min-width: 800px) {
  .page-about .about-team-foot { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px; }
}

.page-about .about-team-label {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-about .about-team-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 05 时间线 ---------- */

.page-about .about-history { color: var(--brown); }

.page-about .about-timeline-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 36px;
}

@media (min-width: 900px) {
  .page-about .about-timeline-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 48px;
  }
}

.page-about .about-timeline-shot {
  margin: 0;
  align-self: start;
  border: 1px solid rgba(23, 18, 14, .16);
  background: var(--ink);
}

.page-about .about-timeline-shot img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-timeline-cap {
  padding: 12px 14px 14px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--haze);
  border-top: 1px solid var(--grid);
}

.page-about .about-nodes {
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
  border-left: 1px solid rgba(23, 18, 14, .2);
}

.page-about .about-node {
  position: relative;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 24px;
  width: 9px;
  height: 9px;
  background: var(--cream);
  border: 2px solid var(--orange);
}

.page-about .about-node details {
  border-bottom: var(--about-rule-ink);
}

.page-about .about-node summary {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) 16px;
  align-items: center;
  gap: 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .about-node summary::-webkit-details-marker { display: none; }
.page-about .about-node summary::marker { content: ""; }

.page-about .about-node-year {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-about .about-node-title {
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--brown);
}

.page-about .about-node-sign {
  position: relative;
  width: 12px;
  height: 12px;
  justify-self: end;
}

.page-about .about-node-sign::before,
.page-about .about-node-sign::after {
  content: "";
  position: absolute;
  background: rgba(23, 18, 14, .45);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-node-sign::before {
  left: 0;
  top: 5px;
  width: 12px;
  height: 1px;
}

.page-about .about-node-sign::after {
  left: 5px;
  top: 0;
  width: 1px;
  height: 12px;
}

.page-about .about-node details[open] .about-node-sign::after {
  transform: scaleY(0);
}

.page-about .about-node details[open] .about-node-sign::before {
  background: var(--orange);
}

.page-about .about-node-body {
  padding: 0 0 20px 76px;
}

@media (max-width: 599px) {
  .page-about .about-node-body { padding-left: 0; }
  .page-about .about-node summary { grid-template-columns: 50px minmax(0, 1fr) 16px; gap: 10px; }
}

.page-about .about-node-body p {
  margin: 0 0 8px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-ink-body);
}

.page-about .about-node-meta {
  font-size: 11.5px;
  letter-spacing: .06em;
  color: rgba(23, 18, 14, .5);
  margin: 0;
}

.page-about .about-history-foot {
  margin: 34px 0 0;
  padding-top: 20px;
  border-top: var(--about-rule-ink);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-ink-body);
}

.page-about .about-history-foot a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 107, 255, .4);
}

.page-about .about-history-foot a:hover { border-bottom-color: var(--blue); }

/* ---------- 06 协作网络 ---------- */

.page-about .about-network { color: var(--brown); }

.page-about .about-network-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  background: var(--ink);
  border: 1px solid var(--grid);
  padding: 32px 24px 34px;
  background-image:
    linear-gradient(to right, rgba(43, 58, 85, .28) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(43, 58, 85, .28) 1px, transparent 1px);
  background-size: 24px 24px;
}

@media (min-width: 900px) {
  .page-about .about-network-panel {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 48px;
    padding: 44px 40px 46px;
  }
}

.page-about .about-network-copy .section-title { color: #fff; }
.page-about .about-network-copy .section-note { color: var(--about-body); }

.page-about .about-network-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--grid);
}

.page-about .about-network-item {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--grid);
}

@media (max-width: 599px) {
  .page-about .about-network-item { grid-template-columns: 1fr; gap: 6px; }
}

.page-about .about-network-key {
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-about .about-network-val {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-body);
}

.page-about .about-matrix-wrap {
  align-self: start;
}

.page-about .about-matrix-label {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-about .about-matrix {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 5px;
  max-width: 320px;
}

.page-about .about-cell {
  display: block;
  aspect-ratio: 1 / 1;
  min-height: 26px;
  border: 1px solid var(--grid);
  background: rgba(31, 107, 255, .12);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-cell:nth-child(3n) { background: rgba(255, 107, 26, .16); }
.page-about .about-cell:nth-child(5n) { background: rgba(35, 211, 160, .14); }

.page-about .about-cell:hover {
  background: var(--blue);
  border-color: var(--blue-soft);
}

.page-about .about-matrix-note {
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--haze);
  max-width: 320px;
}

/* ---------- 收束 ---------- */

.page-about .about-next-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .about-next-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
  }
}

.page-about .about-next-kicker {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-next-title {
  margin: 0 0 14px;
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.22;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.01em;
}

.page-about .about-next-text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--about-body);
  max-width: 44em;
}

.page-about .about-next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 900px) {
  .page-about .about-next-actions { justify-content: flex-end; }
}

/* ---------- 窄屏兜底 ---------- */

@media (max-width: 599px) {
  .page-about .about-filter-count {
    margin-left: 0;
    width: 100%;
  }
  .page-about .about-matrix { max-width: 100%; }
}