/* ===== 品牌文化页 ===== */
.page-about {
  display: block;
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .breadcrumb {
  padding: 26px 0 0;
}
.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
}
.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--jade);
}
.page-about .breadcrumb a {
  color: var(--indigo);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--navy);
  border-bottom-color: var(--gold);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--jade);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  margin-top: 26px;
  padding: 52px 0 56px;
  background: linear-gradient(116deg, var(--navy) 0%, var(--navy) 58%, var(--navy-2) 58.4%, var(--navy-2) 100%);
  color: var(--paper);
  overflow: hidden;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -90px;
  right: -70px;
  width: 260px;
  height: 260px;
  background: var(--gold);
  opacity: 0.14;
  transform: rotate(26deg);
  pointer-events: none;
}
.page-about .about-hero .eyebrow {
  position: relative;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}
.page-about .about-hero h1 {
  position: relative;
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(27px, 6.2vw, 46px);
  line-height: 1.28;
  letter-spacing: 0.06em;
  max-width: 15em;
}
.page-about .about-hero__lede {
  position: relative;
  margin: 22px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(246, 243, 236, 0.82);
}
.page-about .about-facts {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
  margin: 38px 0 0;
  padding: 26px 0 0;
  list-style: none;
  border-top: 1px solid rgba(246, 243, 236, 0.18);
}
.page-about .about-fact__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  letter-spacing: 0.04em;
  color: var(--gold);
}
.page-about .about-fact__txt {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(246, 243, 236, 0.7);
}

/* 章节骨架 */
.page-about .about-chapter {
  padding: 52px 0 6px;
}
.page-about .about-chapter + .about-chapter {
  margin-top: 34px;
  border-top: 1px solid var(--line);
}
.page-about .chapter-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
}
.page-about .chapter-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
  padding-bottom: 2px;
  border-bottom: 1px solid var(--line-gold);
}
.page-about .chapter-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.4;
  letter-spacing: 0.05em;
  color: var(--navy);
}

/* 正文 */
.page-about .about-body {
  max-width: 66ch;
}
.page-about .about-body p {
  margin: 0 0 18px;
  font-size: 16.5px;
  line-height: 1.92;
  color: rgba(13, 17, 20, 0.86);
}
.page-about .about-body p:last-child {
  margin-bottom: 0;
}
.page-about .about-body .about-lead {
  font-family: var(--font-editorial);
  font-size: 17.5px;
  color: var(--navy);
}
.page-about .about-body a {
  color: var(--navy);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}
.page-about .about-body a:hover,
.page-about .about-body a:focus-visible {
  color: var(--indigo);
  border-bottom-color: var(--indigo);
}

/* 引文 */
.page-about .pull-quote {
  margin: 30px 0;
  padding: 2px 0 2px 22px;
  border-left: 2px solid var(--gold);
}
.page-about .pull-quote p {
  margin: 0;
  font-family: var(--font-editorial);
  font-size: 21px;
  line-height: 1.68;
  color: var(--navy);
}
.page-about .pull-quote cite {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--jade);
}

/* 团队 */
.page-about .team-grid {
  display: grid;
  gap: 26px;
}
.page-about .team-figure {
  margin: 0;
}
.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}
.page-about .media-caption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--jade);
}

/* 语言点阵 */
.page-about .lang-matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .lang-cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--paper);
  transition: background 200ms var(--ease);
}
.page-about .lang-cell:hover,
.page-about .lang-cell:focus-within {
  background: var(--gold-l);
}
.page-about .lang-cell__code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--indigo);
}
.page-about .lang-cell__name {
  font-size: 15px;
  font-weight: 600;
  color: var(--navy);
}
.page-about .lang-cell__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--jade);
}

/* 服务大厅 */
.page-about .hall-figure {
  margin: 28px 0 26px;
}
.page-about .hall-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* 合作生态 */
.page-about .eco-block {
  margin-top: 26px;
}
.page-about .eco-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}
.page-about .eco-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line-strong);
  background: transparent;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--navy);
  cursor: pointer;
  transition: background 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease);
}
.page-about .eco-tab:hover {
  border-color: var(--gold);
}
.page-about .eco-panel {
  display: none;
  max-width: 66ch;
}
.page-about .eco-panel p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(13, 17, 20, 0.86);
}
.page-about .eco-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}
.page-about .eco-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--navy);
}
.page-about .eco-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border: 1px solid var(--gold);
  background: var(--gold-l);
}
.page-about #eco-legal:checked ~ .eco-tabs .eco-tab[for="eco-legal"],
.page-about #eco-edu:checked ~ .eco-tabs .eco-tab[for="eco-edu"],
.page-about #eco-med:checked ~ .eco-tabs .eco-tab[for="eco-med"],
.page-about #eco-logi:checked ~ .eco-tabs .eco-tab[for="eco-logi"] {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--paper);
}
.page-about #eco-legal:checked ~ .eco-panels .eco-panel--legal,
.page-about #eco-edu:checked ~ .eco-panels .eco-panel--edu,
.page-about #eco-med:checked ~ .eco-panels .eco-panel--med,
.page-about #eco-logi:checked ~ .eco-panels .eco-panel--logi {
  display: block;
}
.page-about #eco-legal:focus-visible ~ .eco-tabs .eco-tab[for="eco-legal"],
.page-about #eco-edu:focus-visible ~ .eco-tabs .eco-tab[for="eco-edu"],
.page-about #eco-med:focus-visible ~ .eco-tabs .eco-tab[for="eco-med"],
.page-about #eco-logi:focus-visible ~ .eco-tabs .eco-tab[for="eco-logi"] {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* 时间轴 */
.page-about .about-timeline {
  position: relative;
  margin: 38px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 12px;
  bottom: 34px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--line-gold) 55%, rgba(200, 162, 74, 0.12) 100%);
}
.page-about .tl-node {
  position: relative;
  padding-left: 30px;
  padding-bottom: 32px;
}
.page-about .tl-node:last-child {
  padding-bottom: 6px;
}
.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px var(--paper);
}
.page-about .tl-summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  cursor: pointer;
  list-style: none;
}
.page-about .tl-summary::-webkit-details-marker {
  display: none;
}
.page-about .tl-summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--indigo);
}
.page-about .tl-details[open] .tl-summary::after {
  content: "–";
}
.page-about .tl-summary:hover .tl-title,
.page-about .tl-summary:focus-visible .tl-title {
  color: var(--indigo);
}
.page-about .tl-summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}
.page-about .tl-idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}
.page-about .tl-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--navy);
  transition: color 180ms var(--ease);
}
.page-about .tl-body {
  margin-top: 14px;
}
.page-about .tl-body p {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(13, 17, 20, 0.84);
}
.page-about .tl-figure {
  margin: 20px 0 0;
}
.page-about .tl-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* 结尾 */
.page-about .about-close {
  padding: 56px 0 84px;
}
.page-about .about-close__inner {
  max-width: 62ch;
  padding-top: 30px;
  border-top: 1px solid var(--line-strong);
}
.page-about .about-close .about-close__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}
.page-about .about-close h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 3.4vw, 26px);
  line-height: 1.44;
  letter-spacing: 0.05em;
  color: var(--navy);
}
.page-about .about-close p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(13, 17, 20, 0.82);
}
.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

@media (min-width: 640px) {
  .page-about .lang-matrix {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-hero {
    padding: 68px 0 72px;
  }
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
  .page-about .hall-figure img {
    aspect-ratio: 16 / 7;
  }
  .page-about .about-chapter {
    padding: 62px 0 8px;
  }
}

@media (min-width: 900px) {
  .page-about .team-grid {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }
  .page-about .lang-matrix {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
  .page-about .tl-node {
    padding-left: 40px;
    padding-bottom: 38px;
  }
  .page-about .tl-node::before {
    left: 2px;
    top: 11px;
  }
  .page-about .tl-title {
    font-size: 19px;
  }
  .page-about .tl-node--first .tl-body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 30px;
    align-items: start;
  }
  .page-about .tl-node--first .tl-body p {
    margin-bottom: 0;
  }
  .page-about .tl-node--first .tl-figure {
    margin-top: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .lang-cell,
  .page-about .eco-tab,
  .page-about .tl-title,
  .page-about .breadcrumb a {
    transition: none;
  }
}