.page-about {
  --about-rail-w: 236px;
  --about-gap: 56px;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding: 22px 0 2px;
}

.page-about .breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--rock);
}

.page-about .breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  color: var(--line);
}

.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--ink-mid);
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 26px 0 6px;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 38px;
  align-items: center;
}

.page-about .about-hero-copy .page-title {
  margin: 10px 0 0;
  font-family: var(--serif);
  font-size: clamp(29px, 4.7vw, 43px);
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--ink-deep);
}

.page-about .about-hero-copy .lede {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--rock);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero-visual {
  position: relative;
}

.page-about .about-hero-visual::before {
  content: "";
  position: absolute;
  right: -14px;
  bottom: -16px;
  width: 62%;
  height: 58%;
  border-radius: var(--radius-deep);
  background: linear-gradient(140deg, var(--gold-soft) 0%, var(--mist-soft) 100%);
  opacity: 0.92;
}

.page-about .hero-card {
  position: relative;
  z-index: 1;
  padding: 26px 24px 24px;
  border-radius: var(--radius-deep);
  background: linear-gradient(160deg, var(--ink-mid) 0%, var(--ink-deep) 100%);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.page-about .hero-card::after {
  content: "";
  position: absolute;
  top: -90px;
  right: -80px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 162, 74, 0.44) 0%, rgba(201, 162, 74, 0) 70%);
  pointer-events: none;
}

.page-about .hero-card-top {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.page-about .hero-id {
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--gold-soft);
}

.page-about .hero-card-lines {
  position: relative;
  display: grid;
  gap: 12px;
  margin: 26px 0 22px;
  padding: 0;
  list-style: none;
}

.page-about .hero-card-lines li {
  height: 9px;
  border-radius: var(--radius-pill);
  background: rgba(247, 243, 234, 0.16);
}

.page-about .hero-card-lines li:nth-child(1) {
  width: 88%;
  background: rgba(247, 243, 234, 0.3);
}

.page-about .hero-card-lines li:nth-child(2) {
  width: 64%;
}

.page-about .hero-card-lines li:nth-child(3) {
  width: 76%;
}

.page-about .hero-card-lines li:nth-child(4) {
  width: 42%;
}

.page-about .hero-search {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(235, 220, 180, 0.34);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gold-soft);
}

.page-about .hero-search-dot {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--gold);
}

/* ---------- 主体两栏：叙事 + 章节锚点 ---------- */
.page-about .about-layout {
  display: grid;
  gap: 42px;
  padding-top: 74px;
}

.page-about .about-stream {
  display: grid;
  gap: 56px;
  min-width: 0;
}

.page-about .about-section {
  scroll-margin-top: 116px;
}

.page-about .section-index {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .section-title {
  margin: 0 0 16px;
  font-family: var(--serif);
  font-size: clamp(23px, 2.7vw, 29px);
  line-height: 1.42;
  letter-spacing: 0.01em;
  color: var(--ink-deep);
}

.page-about .about-section > p {
  margin: 0 0 16px;
  max-width: 40em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--rock);
}

.page-about .about-section > p:last-child {
  margin-bottom: 0;
}

/* ---------- 右侧章节锚点 ---------- */
.page-about .about-rail {
  min-width: 0;
}

.page-about .rail-nav {
  padding: 18px 14px;
  border-radius: var(--radius-panel);
  background: var(--glass);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.page-about .rail-title {
  margin: 0 0 10px;
  padding-left: 12px;
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .rail-nav ul {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .rail-nav a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 12px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  line-height: 1.5;
  color: var(--rock);
  text-decoration: none;
  transition: background-color 0.24s var(--ease), color 0.24s var(--ease);
}

.page-about .rail-nav a:hover,
.page-about .rail-nav a:focus-visible {
  background: var(--gold-soft);
  color: var(--ink-deep);
}

.page-about .rail-nav a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

@media (max-width: 1059px) {
  .page-about .about-rail {
    order: -1;
  }

  .page-about .rail-nav {
    padding: 10px 12px;
  }

  .page-about .rail-title {
    display: none;
  }

  .page-about .rail-nav ul {
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    gap: 6px;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scrollbar-width: thin;
  }

  .page-about .rail-nav li {
    display: contents;
  }
}

@media (min-width: 1060px) {
  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) var(--about-rail-w);
    column-gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 112px;
    align-self: start;
  }
}

/* ---------- 四类服务 ---------- */
.page-about .serve-list {
  display: grid;
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
  overflow: hidden;
}

.page-about .serve-list li {
  background: var(--cream);
  padding: 22px 24px;
  transition: background-color 0.24s var(--ease);
}

.page-about .serve-list li:hover {
  background: #fffdf7;
}

.page-about .serve-list h3 {
  margin: 0 0 8px;
  font-family: var(--sans);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-deep);
}

.page-about .serve-list p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--rock);
}

.page-about .serve-note {
  margin-top: 22px;
}

.page-about .serve-note p {
  margin: 0;
}

/* ---------- 深墨绿断句面板 ---------- */
.page-about .about-break {
  position: relative;
  padding: 40px 32px 40px 36px;
  border-radius: var(--radius-deep);
  background: linear-gradient(150deg, var(--ink-mid) 0%, var(--ink-deep) 100%);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.page-about .about-break::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--clay) 100%);
}

.page-about .about-break p {
  margin: 0;
  max-width: 32em;
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.82;
  color: rgba(247, 243, 234, 0.94);
}

/* ---------- 四条内容线 ---------- */
.page-about .line-grid {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.page-about .line-card {
  padding: 22px 22px 20px;
  border-radius: var(--radius-panel);
  background: var(--cream);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .line-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold-soft);
  box-shadow: var(--shadow-md);
}

.page-about .line-card h3 {
  margin: 0 0 8px;
  font-family: var(--sans);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-deep);
}

.page-about .line-card p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--rock);
}

/* ---------- 数字面板 ---------- */
.page-about .fact-strip {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .fact-card {
  position: relative;
  padding: 26px 20px 22px;
  border-radius: var(--radius-panel);
  background: var(--cream);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.page-about .fact-card::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 0;
  width: 34px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--gold);
}

.page-about .fact-num {
  margin: 0;
  font-family: var(--mono);
  font-size: 32px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink-deep);
}

.page-about .fact-label {
  margin: 6px 0 0;
  font-size: 15px;
  color: var(--rock);
}

.page-about .fact-sub {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 维护团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 28px;
  margin-top: 22px;
}

.page-about .role-list {
  display: grid;
  gap: 18px;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .role-list dt {
  padding-left: 12px;
  border-left: 2px solid var(--gold);
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-mid);
}

.page-about .role-list dd {
  margin: 7px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--rock);
}

/* ---------- 图片容器 ---------- */
.page-about .media-frame {
  border-radius: var(--radius-panel);
  overflow: hidden;
  background: var(--mist-soft);
  box-shadow: var(--shadow-sm);
}

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

/* ---------- 更新与迭代 ---------- */
.page-about .cadence-grid {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-about .cadence-copy p {
  margin: 0 0 14px;
  max-width: 36em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--rock);
}

.page-about .cadence-link {
  margin: 4px 0 0 !important;
}

.page-about .cadence-link a {
  display: inline-flex;
  align-items: center;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.22s var(--ease);
}

.page-about .cadence-link a:hover,
.page-about .cadence-link a:focus-visible {
  color: var(--ink-mid);
  text-decoration: underline;
}

.page-about .timeline {
  position: relative;
  margin: 34px 0 0;
  padding: 4px 0 4px 30px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--clay) 0%, var(--gold) 52%, var(--mist) 100%);
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 74, 0.16);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .tl-item:hover::before {
  transform: scale(1.4);
  box-shadow: 0 0 0 7px rgba(201, 162, 74, 0.22);
}

.page-about .tl-year {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--clay);
}

.page-about .tl-item h3 {
  margin: 4px 0 6px;
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.45;
  color: var(--ink-deep);
}

.page-about .tl-item p {
  margin: 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--rock);
}

.page-about .cadence-note {
  margin: 24px 0 0;
  padding: 16px 18px;
  border-left: 2px solid var(--gold);
  border-radius: 0 var(--radius-panel) var(--radius-panel) 0;
  background: var(--gold-soft);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-mid);
}

/* ---------- 地域协同 ---------- */
.page-about .region-media {
  margin-top: 26px;
}

/* ---------- 收尾深色面板 ---------- */
.page-about .about-trust {
  position: relative;
  padding: 40px 32px;
  border-radius: var(--radius-deep);
  background: linear-gradient(150deg, var(--ink-mid) 0%, var(--ink-deep) 100%);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.page-about .about-trust .section-title {
  color: var(--cream);
}

.page-about .about-trust .section-index {
  color: var(--gold);
}

.page-about .trust-list {
  display: grid;
  gap: 20px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .trust-list li {
  padding-left: 16px;
  border-left: 2px solid rgba(201, 162, 74, 0.5);
}

.page-about .trust-list h3 {
  margin: 0 0 6px;
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 700;
  color: var(--gold-soft);
}

.page-about .trust-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(247, 243, 234, 0.82);
}

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

.page-about .about-trust .btn-ghost {
  color: var(--cream);
  border-color: rgba(247, 243, 234, 0.4);
}

.page-about .about-trust .btn-ghost:hover,
.page-about .about-trust .btn-ghost:focus-visible {
  background: rgba(247, 243, 234, 0.12);
  border-color: var(--gold);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .fact-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .line-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .trust-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 34px;
  }
}

@media (min-width: 880px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 40px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .cadence-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 40px;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: 56px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-break {
    padding: 44px 44px 44px 46px;
  }

  .page-about .about-trust {
    padding: 48px 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .line-card:hover {
    transform: none;
  }

  .page-about .tl-item:hover::before {
    transform: none;
  }
}