/* ============ 会馆介绍页 page-about ============ */

.page-about {
  background: var(--ink-900);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(40px, 7vw, 96px) 0 clamp(40px, 6vw, 76px);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(200, 145, 47, 0.18), transparent 58%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
  border-bottom: 1px solid var(--edge);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: linear-gradient(90deg, var(--amber) 0 60%, var(--coral) 60% 72%, var(--celadon) 72% 100%);
}

.page-about .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--steel);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .breadcrumbs a {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--amber-bright);
  border-bottom-color: var(--amber-bright);
}

.page-about .breadcrumbs span[aria-hidden="true"] {
  color: var(--amber);
}

.page-about .breadcrumbs span[aria-current="page"] {
  color: var(--paper);
}

.page-about .about-hero .kicker {
  color: var(--amber-bright);
  margin-bottom: 18px;
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.95rem, 5vw, 3.7rem);
  line-height: 1.2;
  letter-spacing: -0.005em;
  color: var(--paper);
  margin: 0 0 clamp(20px, 2.6vw, 30px);
  max-width: 22ch;
}

.page-about .about-hero__lead {
  font-size: clamp(1rem, 1.15vw, 1.12rem);
  line-height: 1.85;
  color: rgba(244, 237, 225, 0.82);
  max-width: 60ch;
  margin: 0 0 clamp(28px, 4vw, 46px);
}

.page-about .hero-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--edge);
  border: 1px solid var(--edge);
  max-width: 760px;
}

@media (min-width: 640px) {
  .page-about .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .hero-facts li {
  background: var(--ink-800);
  padding: 16px 14px 15px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .hero-facts__num {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1;
  color: var(--amber-bright);
  font-variant-numeric: tabular-nums;
  border-bottom: 2px solid var(--edge-amber);
  align-self: flex-start;
  padding-bottom: 4px;
}

.page-about .hero-facts__label {
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  color: var(--steel);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-shell {
  padding-top: clamp(40px, 6vw, 82px);
  padding-bottom: clamp(48px, 8vw, 110px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 1080px) {
  .page-about .about-shell {
    grid-template-columns: 196px minmax(0, 1fr);
    column-gap: clamp(36px, 5vw, 72px);
    align-items: start;
  }
}

/* ---------- 章节索引 ---------- */
.page-about .about-toc {
  border-top: 3px solid var(--edge-amber);
  padding-top: 14px;
  margin-bottom: clamp(36px, 5vw, 56px);
}

@media (min-width: 1080px) {
  .page-about .about-toc {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    margin-bottom: 0;
  }
}

.page-about .about-toc__title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--steel);
  margin: 0 0 12px;
}

.page-about .toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
}

@media (min-width: 1080px) {
  .page-about .toc-list {
    flex-direction: column;
    gap: 0;
  }
}

.page-about .toc-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 5px 0;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .toc-index {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .toc-link:hover,
.page-about .toc-link:focus-visible {
  color: var(--paper);
}

.page-about .toc-link[aria-current="location"] {
  color: var(--amber-bright);
  border-bottom-color: var(--amber-bright);
}

/* ---------- 章节容器：宽窄交替 ---------- */
.page-about .about-flow {
  min-width: 0;
}

.page-about .about-sec {
  padding-bottom: clamp(48px, 7vw, 92px);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

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

.page-about .about-sec--narrow {
  max-width: 720px;
}

.page-about .about-sec--wide,
.page-about .about-sec--band {
  max-width: 100%;
}

/* ---------- 标题组 ---------- */
.page-about .sec-head {
  margin-bottom: clamp(20px, 2.6vw, 30px);
}

.page-about .sec-head h2 {
  position: relative;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(1.42rem, 2.7vw, 2.15rem);
  line-height: 1.3;
  color: var(--paper);
  margin: 0;
  padding-top: 18px;
}

.page-about .sec-head h2::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 42px;
  height: 2px;
  background: var(--amber);
  transform: skewX(-30deg);
}

/* ---------- 正文 ---------- */
.page-about .about-text p {
  font-size: clamp(1rem, 0.98rem + 0.14vw, 1.08rem);
  line-height: 1.82;
  color: rgba(244, 237, 225, 0.84);
  margin: 0 0 1.05em;
}

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

.page-about .about-text strong {
  color: var(--amber-bright);
  font-weight: 700;
}

.page-about .about-aside {
  margin-top: clamp(22px, 3vw, 32px);
  border-left: 3px solid var(--coral);
  padding: 2px 0 2px 16px;
}

.page-about .about-aside p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: rgba(244, 237, 225, 0.68);
}

.page-about .about-aside a {
  color: var(--amber-bright);
  text-decoration: none;
  border-bottom: 1px solid var(--edge-amber);
}

.page-about .about-aside a:hover,
.page-about .about-aside a:focus-visible {
  border-bottom-color: var(--amber-bright);
}

.page-about .about-note {
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--edge);
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(244, 237, 225, 0.66);
}

.page-about .about-note a {
  color: var(--amber-bright);
  text-decoration: none;
  border-bottom: 1px solid var(--edge-amber);
}

.page-about .about-note a:hover,
.page-about .about-note a:focus-visible {
  border-bottom-color: var(--amber-bright);
}

/* ---------- 暖纸白面板 ---------- */
.page-about .paper-panel {
  position: relative;
  background: var(--paper);
  color: var(--text-ink);
  padding: clamp(22px, 3.4vw, 46px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-about .paper-panel .sec-head h2 {
  color: var(--text-ink);
}

.page-about .paper-panel .about-text p {
  color: rgba(42, 52, 64, 0.86);
}

.page-about .paper-panel .about-text strong {
  color: var(--ink-800);
  font-weight: 800;
  border-bottom: 2px solid var(--amber);
  padding-bottom: 1px;
}

/* ---------- 图文分栏 ---------- */
.page-about .split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
  align-items: start;
}

@media (min-width: 880px) {
  .page-about .split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .split--flip {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }
}

.page-about .split__main,
.page-about .split__side {
  min-width: 0;
}

/* ---------- 图框 ---------- */
.page-about .media-frame {
  margin: 0;
  overflow: hidden;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.03);
}

.page-about .about-sec--narrow .media-frame {
  margin-top: clamp(22px, 3vw, 32px);
  margin-bottom: clamp(28px, 3.6vw, 42px);
  border: 1px solid var(--edge);
  background: var(--ink-800);
}

/* ---------- 层级比例条 ---------- */
.page-about .scale-bars {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .scale-bars li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 46px;
  align-items: center;
  gap: 10px;
}

.page-about .scale-bars__label {
  font-size: 0.82rem;
  color: rgba(42, 52, 64, 0.72);
}

.page-about .scale-bars__track {
  display: block;
  height: 13px;
  background: rgba(42, 52, 64, 0.09);
}

.page-about .scale-bars__fill {
  display: block;
  height: 100%;
  background: var(--celadon);
  clip-path: polygon(0 0, 100% 0, calc(100% - 7px) 100%, 0 100%);
}

.page-about .scale-bars__fill--l1 {
  width: 20%;
}

.page-about .scale-bars__fill--l2 {
  width: 45%;
}

.page-about .scale-bars__fill--l3 {
  width: 100%;
}

.page-about .scale-bars__num {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  text-align: right;
  color: var(--text-ink);
  font-variant-numeric: tabular-nums;
  border-bottom: 2px solid var(--amber);
  padding-bottom: 1px;
}

/* ---------- 栏目树展开 ---------- */
.page-about .tree {
  margin-top: clamp(22px, 2.8vw, 32px);
  border: 1px solid rgba(42, 52, 64, 0.16);
  background: rgba(231, 216, 188, 0.42);
}

.page-about .tree--sub {
  margin-top: 14px;
  background: rgba(244, 237, 225, 0.72);
}

.page-about .tree > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--text-ink);
}

.page-about .tree > summary::-webkit-details-marker {
  display: none;
}

.page-about .tree > summary::before {
  content: "+";
  display: inline-block;
  width: 14px;
  font-weight: 700;
  color: var(--celadon);
}

.page-about .tree[open] > summary::before {
  content: "−";
}

.page-about .tree > summary:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.page-about .tree__body {
  padding: 12px 16px 16px 40px;
  border-top: 1px solid rgba(42, 52, 64, 0.12);
}

.page-about .tree__body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(42, 52, 64, 0.8);
}

/* ---------- 版本时间线 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--amber) 0%, rgba(138, 160, 180, 0.42) 62%, rgba(138, 160, 180, 0.08) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: clamp(18px, 2.4vw, 28px);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 9px;
  width: 13px;
  height: 13px;
  background: var(--ink-900);
  border: 2px solid var(--amber);
  transform: rotate(45deg);
}

.page-about .timeline__item:last-child::before {
  background: var(--amber-bright);
  border-color: var(--amber-bright);
  box-shadow: 0 0 0 5px rgba(232, 180, 75, 0.16);
}

.page-about .vnode > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
}

.page-about .vnode > summary::-webkit-details-marker {
  display: none;
}

.page-about .vnode > summary:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-about .vnode__ver {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--amber-bright);
  border-bottom: 2px solid var(--amber);
  padding-bottom: 1px;
  font-variant-numeric: tabular-nums;
}

.page-about .vnode__time {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-about .vnode > summary::after {
  content: "＋";
  margin-left: auto;
  font-size: 0.85rem;
  line-height: 1;
  color: var(--amber);
}

.page-about .vnode[open] > summary::after {
  content: "－";
}

.page-about .vnode__body {
  margin: 12px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--edge-amber);
  font-size: 0.96rem;
  line-height: 1.8;
  color: rgba(244, 237, 225, 0.76);
}

/* ---------- 团队分工标签 ---------- */
.page-about .team-tags {
  margin-top: clamp(24px, 3.4vw, 38px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

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

.page-about .team-tag {
  padding: 18px 18px 20px;
  background: rgba(231, 216, 188, 0.5);
  border-top: 3px solid var(--celadon);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .team-tag:nth-child(2) {
  border-top-color: var(--amber);
}

.page-about .team-tag:nth-child(3) {
  border-top-color: var(--coral);
}

.page-about .team-tag h3 {
  font-family: var(--font-heading);
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-ink);
  margin: 0 0 10px;
}

.page-about .team-tag__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink-800);
  font-variant-numeric: tabular-nums;
  border-bottom: 2px solid var(--amber);
  padding-bottom: 1px;
  margin: 0 0 10px;
}

.page-about .team-tag__desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(42, 52, 64, 0.8);
}

/* ---------- 全宽年度体检块 ---------- */
.page-about .band-panel {
  padding: clamp(24px, 3.6vw, 46px);
  background: linear-gradient(135deg, var(--ink-800) 0%, var(--ink-700) 100%);
  border-left: 4px solid var(--coral);
  clip-path: polygon(0 0, calc(100% - 34px) 0, 100% 34px, 100% 100%, 0 100%);
}

.page-about .care-points {
  list-style: none;
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

@media (min-width: 820px) {
  .page-about .care-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }
}

.page-about .care-points li {
  border-top: 1px solid var(--edge);
  padding-top: 16px;
}

.page-about .care-points h3 {
  font-family: var(--font-heading);
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--amber-bright);
  margin: 0 0 10px;
}

.page-about .care-points p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(244, 237, 225, 0.76);
}

/* ---------- 收尾行动 ---------- */
.page-about .value-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 34px);
}

/* ---------- 焦点态统一 ---------- */
.page-about a:focus-visible,
.page-about summary:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}
<<<END>>>