/* ===== 品牌自述 ===== */
.page-about {
  --about-rule: rgba(169, 121, 63, 0.32);
  --about-rule-strong: rgba(169, 121, 63, 0.55);
  --about-line-dark: rgba(201, 169, 97, 0.28);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .breadcrumb {
  padding-top: 28px;
  padding-bottom: 12px;
  font-size: 14px;
  color: var(--mist);
}
.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .breadcrumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--wood);
}
.page-about .breadcrumb__list a {
  color: var(--celadon);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.page-about .breadcrumb__list a:hover,
.page-about .breadcrumb__list a:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

/* 题头 */
.about-head {
  padding-top: 8px;
  padding-bottom: 48px;
}
.about-head__kicker {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 0.22em;
  color: var(--wood);
}
.about-head__title {
  margin: 0 0 24px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(30px, 8vw, 46px);
  line-height: 1.3;
  color: var(--celadon-deep);
  max-width: 16em;
}
.about-head__lede {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  max-width: 42em;
  color: var(--ink);
}
.about-head__lede:last-child {
  margin-bottom: 0;
}

/* 图片通用 */
.page-about .figure {
  margin-left: 0;
  margin-right: 0;
}
.page-about .figure__frame {
  position: relative;
  overflow: hidden;
  background: var(--paper-2);
  border: 1px solid var(--about-rule);
}
.page-about .figure__media {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .figure__caption {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 46em;
}
.page-about .figure--about-open .figure__frame {
  aspect-ratio: 3 / 2;
}
.page-about .figure--about-split .figure__frame {
  aspect-ratio: 4 / 3;
}
.page-about .figure--about-coop .figure__frame {
  aspect-ratio: 25 / 16;
}
.figure--about-open {
  margin: 0 0 84px;
}

/* 章节节奏 */
.about-block {
  padding-bottom: 88px;
}
.about-block .section-head {
  margin-bottom: 40px;
}

/* 01 主张 */
.tenets {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}
.tenet {
  background: var(--paper);
  padding: 24px 22px 26px;
}
.tenet__key {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--celadon-deep);
}
.tenet__key::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 10px;
  vertical-align: 2px;
  background: var(--wood);
}
.tenet__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

/* 02 时间轴 */
.year-jump {
  margin: 0 0 40px;
}
.year-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.year-jump__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0 10px;
  border: 1px solid var(--about-rule);
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--celadon-deep);
  text-decoration: none;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}
.year-jump__link:hover,
.year-jump__link:focus-visible {
  border-color: var(--cinnabar);
  color: var(--cinnabar);
  background: var(--paper-2);
}

.axis {
  position: relative;
  margin: 0;
  padding: 0 0 0 34px;
  list-style: none;
}
.axis::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--gold);
  opacity: 0.55;
}
.axis__item {
  position: relative;
  padding-bottom: 52px;
}
.axis__item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--paper);
  border: 1px solid var(--wood);
}
.axis__item--current::before {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
}
.axis__item:last-child {
  padding-bottom: 0;
}
.axis__meta {
  margin-bottom: 10px;
}
.axis__year {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.08em;
  color: var(--celadon);
}
.axis__stage {
  margin: 4px 0 0;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--mist);
}
.axis__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}
.axis__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  max-width: 40em;
}

/* 03 团队深色通栏 */
.about-band {
  background: var(--indigo);
  color: var(--paper);
  padding: 72px 0;
  margin-bottom: 88px;
}
.about-band .section-head {
  margin-bottom: 40px;
}
.about-band .section-head .section-head__no {
  color: var(--gold);
}
.about-band .section-head .section-head__title {
  color: var(--paper);
}
.about-band .section-head .section-head__lede {
  color: rgba(247, 243, 234, 0.76);
}

.team-board {
  border-top: 1px solid var(--about-line-dark);
}
.team-board__total {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  padding: 26px 0;
  border-bottom: 1px solid var(--about-line-dark);
  font-size: 15px;
  color: rgba(247, 243, 234, 0.8);
}
.team-board__num {
  font-family: var(--font-serif);
  font-size: 46px;
  font-weight: 600;
  line-height: 1;
  color: var(--gold);
}
.team-rows {
  margin: 0;
  padding: 0;
  list-style: none;
}
.team-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px 16px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(201, 169, 97, 0.16);
  transition: background-color 160ms var(--ease);
}
.team-row:hover {
  background: rgba(247, 243, 234, 0.045);
}
.team-row__label {
  font-size: 15px;
  color: var(--paper);
}
.team-row__num {
  font-size: 15px;
  text-align: right;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}
.team-row__bar {
  grid-column: 1 / -1;
  height: 4px;
  background: rgba(247, 243, 234, 0.14);
}
.team-row__bar span {
  display: block;
  height: 100%;
  width: var(--share, 0%);
  background: rgba(247, 243, 234, 0.42);
  transition: background-color 200ms var(--ease);
}
.team-row--key .team-row__bar span {
  background: var(--gold);
}
.team-row:hover .team-row__bar span {
  background: rgba(247, 243, 234, 0.74);
}
.team-row--key:hover .team-row__bar span {
  background: var(--cinnabar);
}
.team-row__duty {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(247, 243, 234, 0.7);
}

/* 校订组图文 */
.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.split__text .about-subtitle {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-size: clamp(22px, 5vw, 28px);
  font-weight: 600;
  line-height: 1.45;
  color: var(--celadon-deep);
}
.split__text p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  max-width: 40em;
}
.split__text p:last-child {
  margin-bottom: 0;
}
.split__text a {
  color: var(--celadon);
  text-decoration: none;
  border-bottom: 1px solid var(--wood);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.split__text a:hover,
.split__text a:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

/* 04 合作 */
.tabs {
  margin: 0;
}
.tabs__list {
  display: flex;
  flex-wrap: wrap;
  margin: 0 0 28px;
  border-bottom: 1px solid var(--about-rule);
}
.tabs__tab {
  appearance: none;
  margin: 0 0 -1px;
  padding: 0 18px;
  min-height: 48px;
  background: none;
  border: 1px solid transparent;
  border-bottom: 2px solid transparent;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--mist);
  cursor: pointer;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.tabs__tab:hover {
  color: var(--celadon);
}
.tabs__tab[aria-selected="true"] {
  color: var(--celadon-deep);
  border-bottom-color: var(--cinnabar);
}
.tabs__tab:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: -2px;
}
.tabs__panel {
  font-size: 16px;
  line-height: 1.85;
  max-width: 42em;
}
.tabs__panel p {
  margin: 0 0 14px;
}
.tabs__panel p:last-child {
  margin-bottom: 0;
}
.tabs__panel:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 6px;
}

.coop-note {
  margin: 40px 0 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 42em;
}
.regions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}
.region {
  background: var(--paper);
  padding: 18px 16px 20px;
  transition: background-color 160ms var(--ease);
}
.region:hover {
  background: var(--paper-2);
}
.region__name {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--celadon-deep);
}
.region__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}
.figure--about-coop {
  margin: 40px 0 0;
}

/* 05 安全与内容 */
.assure {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}
.assure__item {
  background: var(--paper);
  padding: 24px 22px 26px;
}
.assure__key {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--celadon-deep);
}
.assure__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}
.assure__text a {
  color: var(--celadon);
  text-decoration: none;
  border-bottom: 1px solid var(--wood);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.assure__text a:hover,
.assure__text a:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

/* 06 荣誉 */
.about-honor {
  padding: 64px 0;
  margin-bottom: 88px;
  background: var(--paper-2);
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}
.about-honor .section-head {
  margin-bottom: 40px;
}
.stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.stat {
  padding-left: 20px;
  border-left: 1px solid var(--wood);
}
.stat__num {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(32px, 8vw, 40px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--celadon);
}
.stat__label {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 24em;
}

/* 07 延伸 */
.about-next {
  padding-bottom: 96px;
}
.about-next .section-head {
  margin-bottom: 32px;
}
.next-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}
.next-links li {
  background: var(--paper);
  padding: 24px 22px 26px;
  transition: background-color 160ms var(--ease);
}
.next-links li:hover {
  background: var(--paper-2);
}
.next-links a {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--celadon-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--wood);
  padding-bottom: 2px;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.next-links a:hover,
.next-links a:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}
.next-links span {
  display: block;
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ===== 平板以上 ===== */
@media (min-width: 760px) {
  .tenets {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .regions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .assure {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
  .next-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .team-row {
    grid-template-columns: 200px minmax(0, 1fr) 72px;
    align-items: center;
    column-gap: 20px;
  }
  .team-row__label {
    grid-column: 1;
  }
  .team-row__num {
    grid-column: 3;
  }
  .team-row__bar {
    grid-column: 2;
  }
  .team-row__duty {
    grid-column: 2 / -1;
  }
}

/* ===== 桌面 ===== */
@media (min-width: 900px) {
  .about-head {
    padding-bottom: 64px;
  }
  .figure--about-open {
    margin-bottom: 120px;
  }
  .about-block {
    padding-bottom: 128px;
  }
  .about-band {
    padding: 96px 0;
    margin-bottom: 128px;
  }
  .about-honor {
    padding: 88px 0;
    margin-bottom: 128px;
  }

  .axis {
    padding-left: 0;
  }
  .axis__item {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    column-gap: 24px;
    align-items: start;
    padding-left: 36px;
    padding-bottom: 72px;
  }
  .axis__item::before {
    left: 0;
    top: 14px;
  }
  .axis__year {
    font-size: 34px;
  }
  .axis__meta {
    margin-bottom: 0;
  }

  .split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    column-gap: 48px;
    align-items: start;
  }
  .split__media {
    padding-top: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

.page-about {
  --share: 1rem;
}