/* ===== 关于风云 · 页面专属样式 ===== */
.page-about {
  --track-rail-w: 180px;
  --track-gap: 44px;
  --about-body: rgba(234, 240, 248, .82);
  --about-body-soft: rgba(234, 240, 248, .72);
}

.page-about .breadcrumbs {
  padding-top: clamp(18px, 2.4vw, 28px);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding: clamp(20px, 3vw, 40px) 0 var(--space-md);
}

.page-about .hero-frame {
  position: relative;
  padding: clamp(24px, 4vw, 56px) clamp(20px, 3.6vw, 52px);
  background:
    linear-gradient(158deg, rgba(47, 224, 208, .12), rgba(10, 20, 36, 0) 54%),
    var(--panel);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .hero-frame::before,
.page-about .hero-frame::after {
  content: "";
  position: absolute;
  width: 26px;
  height: 26px;
  border: 1px solid var(--cyan);
  pointer-events: none;
}

.page-about .hero-frame::before {
  top: 12px;
  left: 12px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .hero-frame::after {
  right: 12px;
  bottom: 12px;
  border-top: 0;
  border-left: 0;
}

.page-about .hero-frame .display {
  margin: 14px 0 20px;
  max-width: 20ch;
}

.page-about .hero-frame .lead {
  max-width: 66ch;
  color: var(--about-body);
}

.page-about .hero-metrics {
  list-style: none;
  margin: clamp(28px, 3.6vw, 44px) 0 0;
  padding: clamp(20px, 2.6vw, 30px) 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 24px;
}

@media (min-width: 780px) {
  .page-about .hero-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .hero-metrics li {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.page-about .hm-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.6rem, 2.9vw, 2.3rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .hero-metrics li:nth-child(2) .hm-num,
.page-about .hero-metrics li:nth-child(4) .hm-num {
  color: var(--orange);
}

.page-about .hm-unit {
  margin-left: 4px;
  font-size: .48em;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--muted);
}

.page-about .hm-label {
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 纵向刻度轨道 ---------- */
.page-about .about-track {
  padding: var(--space-md) 0 var(--space-sm);
}

.page-about .track-row {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding-bottom: var(--space-md);
}

@media (min-width: 900px) {
  .page-about .track-row {
    grid-template-columns: var(--track-rail-w) minmax(0, 1fr);
    gap: var(--track-gap);
    padding-bottom: var(--space-lg);
  }
}

.page-about .track-row--last {
  padding-bottom: var(--space-md);
}

.page-about .track-rail {
  position: relative;
  padding-left: 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
}

@media (min-width: 900px) {
  .page-about .track-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

.page-about .track-node {
  position: absolute;
  top: 5px;
  left: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 224, 208, .14);
}

.page-about .track-rail::before {
  content: "";
  position: absolute;
  top: 24px;
  bottom: -48px;
  left: 5px;
  width: 1px;
  background: linear-gradient(180deg, var(--line), rgba(30, 51, 87, .16));
}

.page-about .track-row--last .track-rail::before {
  display: none;
}

.page-about .track-index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .track-era {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
  line-height: 1.6;
  color: var(--muted);
  max-width: 22ch;
}

.page-about .track-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .track-copy {
  margin: 0 0 14px;
  max-width: 70ch;
  font-family: var(--font-body);
  font-size: clamp(.95rem, 1.05vw, 1.05rem);
  line-height: 1.78;
  color: var(--about-body);
}

.page-about .track-intro {
  margin-bottom: 6px;
}

/* ---------- 媒体 ---------- */
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .track-media {
  margin: 26px 0 0;
  border: 1px solid var(--line);
  background: var(--ink);
  overflow: hidden;
}

.page-about .track-media .media-caption {
  padding: 10px 14px;
  font-size: .76rem;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 四条内容线 ---------- */
.page-about .line-grid {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

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

.page-about .line-card {
  position: relative;
  padding: 22px 22px 22px 26px;
  background: var(--panel);
  border: 1px solid var(--line);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.page-about .line-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--cyan);
}

.page-about .line-card--b::before { background: var(--cyan-soft); }
.page-about .line-card--c::before { background: var(--orange); }
.page-about .line-card--d::before { background: var(--cool); }

.page-about .line-card:hover {
  transform: translateY(-4px);
  border-color: rgba(47, 224, 208, .45);
}

.page-about .line-index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .line-name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .line-text {
  margin: 0;
  font-size: .88rem;
  line-height: 1.72;
  color: var(--about-body-soft);
}

/* ---------- 横向流程带 ---------- */
.page-about .flow-wrap {
  position: relative;
  margin-top: 28px;
  padding: clamp(24px, 3vw, 38px) clamp(18px, 2.6vw, 34px);
  background: var(--panel);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .flow-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .18;
  pointer-events: none;
}

.page-about .flow-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(96deg, rgba(18, 32, 58, .94), rgba(18, 32, 58, .6));
  pointer-events: none;
}

.page-about .flow-strip {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

@media (min-width: 900px) {
  .page-about .flow-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 32px;
  }
}

.page-about .flow-step {
  position: relative;
}

@media (min-width: 900px) {
  .page-about .flow-step + .flow-step::before {
    content: "";
    position: absolute;
    top: 9px;
    left: -22px;
    width: 13px;
    height: 1px;
    background: var(--cyan);
    opacity: .55;
  }

  .page-about .flow-step + .flow-step::after {
    content: "";
    position: absolute;
    top: 6px;
    left: -12px;
    width: 5px;
    height: 5px;
    border-top: 1px solid var(--cyan);
    border-right: 1px solid var(--cyan);
    transform: rotate(45deg);
    opacity: .55;
  }
}

.page-about .flow-num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .22em;
  color: var(--orange);
}

.page-about .flow-name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.1rem, 1.7vw, 1.4rem);
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .flow-text {
  margin: 0;
  font-size: .86rem;
  line-height: 1.7;
  color: var(--about-body-soft);
}

/* ---------- 团队分工 ---------- */
.page-about .team-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: 26px;
}

@media (min-width: 900px) {
  .page-about .team-wrap {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
}

.page-about .team-figure {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.page-about .org-ring {
  width: min(200px, 56vw);
  height: auto;
}

.page-about .ring-base {
  fill: none;
  stroke: var(--line);
  stroke-width: 14;
}

.page-about .ring-seg {
  fill: none;
  stroke-width: 14;
  stroke-dasharray: 92 284;
  transform: rotate(-90deg);
  transform-origin: 80px 80px;
  transition: opacity .2s var(--ease);
}

.page-about .seg-a { stroke: var(--cyan); stroke-dashoffset: 0; }
.page-about .seg-b { stroke: var(--cyan-soft); stroke-dashoffset: -94.2; }
.page-about .seg-c { stroke: var(--orange); stroke-dashoffset: -188.4; }
.page-about .seg-d { stroke: var(--cool); stroke-dashoffset: -282.6; }

.page-about .ring-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 30px;
  fill: var(--paper);
  text-anchor: middle;
}

.page-about .ring-cap {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  fill: var(--muted);
  text-anchor: middle;
}

.page-about .team-figure-caption {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--muted);
  text-align: center;
}

.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-item {
  padding: 16px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.page-about .team-item--b { border-left-color: var(--cyan-soft); }
.page-about .team-item--c { border-left-color: var(--orange); }
.page-about .team-item--d { border-left-color: var(--cool); }

.page-about .team-item:hover,
.page-about .team-item:focus-within {
  background: rgba(47, 224, 208, .07);
}

.page-about .team-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1.1rem;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .team-item p {
  margin: 0;
  font-size: .88rem;
  line-height: 1.72;
  color: var(--about-body-soft);
}

/* ---------- 发展节点 ---------- */
.page-about .mile-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 26px;
}

@media (min-width: 900px) {
  .page-about .mile-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 40px;
    align-items: start;
  }
}

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

.page-about .mile-item {
  position: relative;
  padding: 0 0 28px 26px;
}

.page-about .mile-item::before {
  content: "";
  position: absolute;
  top: 7px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 122, 26, .18);
}

.page-about .mile-item::after {
  content: "";
  position: absolute;
  top: 16px;
  bottom: 0;
  left: 4px;
  width: 1px;
  background: var(--line);
}

.page-about .mile-item:last-child {
  padding-bottom: 0;
}

.page-about .mile-item:last-child::after {
  display: none;
}

.page-about .mile-phase {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .22em;
  color: var(--orange);
}

.page-about .mile-item h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.1rem, 1.8vw, 1.35rem);
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .mile-desc {
  margin: 0;
  max-width: 58ch;
  font-size: .88rem;
  line-height: 1.72;
  color: var(--about-body-soft);
}

.page-about .mile-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

/* ---------- 品质与备案 ---------- */
.page-about .quality-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 24px;
}

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

.page-about .quality-card {
  padding: 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--orange);
}

.page-about .q-num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.4rem, 2.4vw, 2.1rem);
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--orange);
}

.page-about .q-unit {
  margin-left: 6px;
  font-size: .42em;
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-about .quality-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1.08rem;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .quality-card p:not(.q-num) {
  margin: 0;
  font-size: .86rem;
  line-height: 1.7;
  color: var(--about-body-soft);
}

.page-about .register-line {
  margin: 24px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--muted);
}

/* ---------- 联系 ---------- */
.page-about .about-contact {
  padding: var(--space-md) 0 var(--space-lg);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(47, 224, 208, .05), rgba(10, 20, 36, 0) 72%);
}

.page-about .contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

@media (min-width: 900px) {
  .page-about .contact-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
}

.page-about .contact-title {
  margin: 12px 0 16px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .contact-copy {
  margin: 0;
  max-width: 52ch;
  font-size: clamp(.95rem, 1.05vw, 1.05rem);
  line-height: 1.78;
  color: var(--about-body);
}

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

.page-about .contact-links li {
  border-bottom: 1px solid var(--line);
}

.page-about .contact-links li:first-child {
  border-top: 1px solid var(--line);
}

.page-about .contact-links a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 0;
  text-decoration: none;
  transition: padding-left .2s var(--ease), color .2s var(--ease);
}

.page-about .cl-label {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1.15rem;
  letter-spacing: .01em;
  color: var(--paper);
  transition: color .2s var(--ease);
}

.page-about .cl-note {
  font-size: .78rem;
  letter-spacing: .05em;
  color: var(--muted);
}

.page-about .contact-links a:hover,
.page-about .contact-links a:focus-visible {
  padding-left: 8px;
}

.page-about .contact-links a:hover .cl-label,
.page-about .contact-links a:focus-visible .cl-label {
  color: var(--cyan);
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .line-card,
  .page-about .team-item,
  .page-about .ring-seg,
  .page-about .contact-links a,
  .page-about .cl-label {
    transition: none;
  }

  .page-about .line-card:hover {
    transform: none;
  }
}