.page-about {
  --about-rule: rgba(169, 113, 79, 0.34);
  --about-hair: rgba(201, 162, 39, 0.24);
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(40px, 6vw, 80px) 0 clamp(40px, 5vw, 68px);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(154, 167, 177, 0.075) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(154, 167, 177, 0.075) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

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

.page-about .breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(20px, 3vw, 34px);
  padding: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .breadcrumb li {
  color: var(--stone);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(154, 167, 177, 0.5);
}

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

.page-about .breadcrumb a:hover {
  color: var(--amber);
}

.page-about .breadcrumb li[aria-current] {
  color: var(--amber);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

.page-about .about-hero .eyebrow {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-hero h1 {
  margin: 0.5em 0 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-lede {
  margin: 1.3em 0 0;
  max-width: 34em;
  font-size: clamp(1rem, 1.5vw, 1.0625rem);
  line-height: 1.85;
  color: rgba(242, 237, 227, 0.86);
}

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

.page-about .about-hero-facts {
  border: 1px solid var(--about-hair);
  background: rgba(18, 41, 61, 0.72);
  padding: 20px 20px 12px;
}

.page-about .facts-title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-hero-facts dl {
  margin: 0;
}

.page-about .fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(154, 167, 177, 0.22);
}

.page-about .fact:last-child {
  border-bottom: 0;
}

.page-about .fact dt {
  font-size: 13px;
  color: var(--stone);
}

.page-about .fact dd {
  margin: 0;
  font-size: 14px;
  color: var(--paper);
  text-align: right;
}

.page-about .fact-num {
  font-family: var(--mono);
  font-size: 16px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  padding: clamp(36px, 5vw, 64px) 0 clamp(56px, 8vw, 96px);
}

.page-about .about-shell {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-index {
  align-self: start;
}

.page-about .index-title {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--clay);
}

.page-about .about-index ol {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-ink);
}

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

.page-about .about-index a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0 10px 8px;
  font-size: 14px;
  color: var(--ink-2);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), padding-left 180ms var(--ease);
}

.page-about .about-index a:hover {
  border-left-color: var(--signal);
  color: var(--ink);
  padding-left: 12px;
}

.page-about .idx-no {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--clay);
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding: clamp(32px, 4.5vw, 52px) 0;
}

.page-about .about-sec + .about-sec {
  border-top: 1px solid var(--about-rule);
}

.page-about .sec-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .sec-no {
  font-family: var(--mono);
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .sec-head h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.6vw, 1.75rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .sec-grid {
  display: grid;
  gap: clamp(20px, 3vw, 28px);
}

.page-about .about-text p {
  margin: 0 0 1.05em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink);
}

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

.page-about .about-text a {
  color: var(--clay);
  text-decoration: none;
  border-bottom: 1px solid rgba(169, 113, 79, 0.45);
}

.page-about .about-text a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ---------- 旁注 ---------- */
.page-about .sec-aside {
  background: var(--paper-2);
  border-left: 2px solid var(--clay);
  padding: 18px 18px 14px;
}

.page-about .aside-title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--clay);
}

.page-about .aside-title--after {
  margin-top: 18px;
}

.page-about .sec-aside p {
  margin: 0 0 0.8em;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(11, 27, 43, 0.82);
}

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

/* ---------- 三种方式列表 ---------- */
.page-about .service-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-ink);
}

.page-about .service-item {
  border-bottom: 1px solid var(--line-ink);
}

.page-about .service-link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 16px;
  gap: 12px;
  align-items: start;
  padding: 14px 2px;
  text-decoration: none;
  color: inherit;
  transition: background 180ms var(--ease), padding-left 180ms var(--ease);
}

.page-about .service-link:hover {
  background: rgba(201, 162, 39, 0.1);
  padding-left: 10px;
}

.page-about .service-k {
  padding-top: 2px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--clay);
}

.page-about .service-name {
  display: block;
  margin-bottom: 3px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.page-about .service-desc {
  display: block;
  font-size: 13.5px;
  line-height: 1.72;
  color: rgba(11, 27, 43, 0.74);
}

.page-about .service-arrow {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--signal);
}

/* ---------- 团队结构图 ---------- */
.page-about .org-figure {
  margin: 26px 0 4px;
  padding: 14px;
  background: var(--white);
  border: 1px solid var(--line-ink);
}

.page-about .about-org {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-org .org-box {
  fill: var(--paper);
  stroke: var(--clay);
  stroke-width: 1;
}

.page-about .about-org .org-box--top {
  fill: var(--ink);
  stroke: var(--amber);
}

.page-about .about-org .org-box--bottom {
  fill: var(--paper-2);
  stroke: var(--moss);
}

.page-about .about-org .org-line {
  fill: none;
  stroke: var(--stone);
  stroke-width: 1;
}

.page-about .about-org .org-t {
  font-family: var(--sans);
  fill: var(--ink);
}

.page-about .about-org .org-box--top + .org-t {
  fill: var(--paper);
}

.page-about .about-org .org-k {
  font-family: var(--mono);
  font-weight: 700;
  fill: var(--amber);
}

/* ---------- 编目人数表 ---------- */
.page-about .team-table {
  width: 100%;
  margin-top: 22px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .team-table th,
.page-about .team-table td {
  padding: 9px 10px;
  text-align: left;
  border-bottom: 1px solid var(--line-ink);
}

.page-about .team-table thead th {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--clay);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .team-table tbody th {
  font-weight: 500;
  color: var(--ink);
}

.page-about .team-table td {
  width: 90px;
  font-family: var(--mono);
  color: var(--ink-2);
}

.page-about .tt-k {
  margin-right: 8px;
  font-family: var(--mono);
  font-weight: 700;
  color: var(--amber);
}

/* ---------- 图片 ---------- */
.page-about .media {
  margin: 0 0 14px;
}

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

.page-about .media-caption {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--stone);
  line-height: 1.6;
}

.page-about .sec-aside .media-caption {
  color: rgba(11, 27, 43, 0.6);
}

.page-about .path-figure {
  margin: 22px 0 8px;
}

/* ---------- 五步展开组 ---------- */
.page-about .about-steps {
  margin-top: 20px;
  border-top: 1px solid var(--line-ink);
}

.page-about .about-steps .disclosure {
  border-bottom: 1px solid var(--line-ink);
}

.page-about .about-steps .disclosure-trigger {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 18px;
  gap: 12px;
  align-items: center;
  width: 100%;
  padding: 16px 2px;
  background: none;
  border: 0;
  text-align: left;
  font-family: var(--sans);
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
}

.page-about .about-steps .disclosure-trigger:hover {
  color: var(--ink-2);
  background: rgba(201, 162, 39, 0.07);
}

.page-about .step-no {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .step-title {
  display: block;
}

.page-about .step-caret {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--signal);
  transition: transform 180ms var(--ease);
}

.page-about .about-steps .disclosure[data-open] .step-caret {
  transform: rotate(90deg);
}

.page-about .about-steps .disclosure-body {
  padding: 0 2px 18px 46px;
}

.page-about .about-steps .disclosure-body p {
  margin: 0 0 0.7em;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(11, 27, 43, 0.82);
}

.page-about .about-steps .disclosure-body p:last-child {
  margin-bottom: 0;
}

.page-about .about-steps .disclosure-body a {
  color: var(--clay);
  text-decoration: none;
  border-bottom: 1px solid rgba(169, 113, 79, 0.45);
}

.page-about .about-steps .disclosure-body a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ---------- 校验面板 ---------- */
.page-about .quality-panel {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
  padding: clamp(18px, 3.5vw, 34px);
  background: var(--ink-2);
  border-left: 3px solid var(--amber);
}

.page-about .quality-panel .media {
  margin: 0;
}

.page-about .quality-panel .media-caption {
  color: var(--stone);
}

.page-about .quality-copy p {
  margin: 0 0 1em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(242, 237, 227, 0.88);
}

.page-about .q-stats {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.page-about .q-stat {
  border-top: 1px solid var(--about-hair);
  padding-top: 10px;
}

.page-about .q-num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(1.4rem, 3vw, 1.75rem);
  letter-spacing: 0.04em;
  color: var(--amber);
  line-height: 1.2;
}

.page-about .q-label {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 联系与响应 ---------- */
.page-about .hours-grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .hours-big {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: clamp(1.35rem, 3.6vw, 2.1rem);
  letter-spacing: 0.03em;
  line-height: 1.25;
  color: var(--ink);
}

.page-about .hours-note {
  margin: 0 0 1em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
}

.page-about .hours-main .btn {
  margin-top: 6px;
}

.page-about .contact-facts {
  margin: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .contact-facts > div {
  padding: 12px 0;
  border-bottom: 1px solid var(--line-ink);
}

.page-about .contact-facts dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--clay);
  margin-bottom: 4px;
}

.page-about .contact-facts dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .q-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 760px) {
  .page-about .hours-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .quality-panel {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 820px) {
  .page-about .sec-grid {
    grid-template-columns: minmax(0, 1fr) var(--aside);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: 64px;
  }

  .page-about .about-text p {
    font-size: 1.0625rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-shell {
    grid-template-columns: 184px minmax(0, 1fr);
    column-gap: clamp(32px, 4.5vw, 64px);
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    padding-top: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .service-link,
  .page-about .step-caret {
    transition: none;
  }
}