/* ==========================================================
   品牌档案 /company/
   作用域：.page-about
   ========================================================== */

.page-about {
  --about-side: 200px;
  --about-lead: 62ch;
  --about-flow: clamp(20px, 2.4vw, 27px);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
}

.page-about a {
  color: inherit;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  background:
    linear-gradient(180deg, rgba(16, 49, 43, .05), rgba(16, 49, 43, 0) 62%),
    var(--paper);
  border-bottom: 1px solid var(--rule);
  padding: 26px 0 44px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
  margin-top: 26px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(31px, 6.2vw, 62px);
  line-height: 1.04;
  letter-spacing: -.012em;
  margin: 14px 0 18px;
  color: var(--ink);
}

.page-about .about-hero__lead .lede {
  margin: 0;
  max-width: 48ch;
  color: var(--ink);
}

.page-about .about-anchors {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--rule-strong);
  border-left: 1px solid var(--rule);
}

.page-about .about-anchors__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 14px 16px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: rgba(232, 220, 184, .28);
}

.page-about .about-anchors__num {
  font-family: var(--font-data);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--forest);
}

.page-about .about-anchors__label {
  font-size: 12px;
  line-height: 1.55;
  letter-spacing: .04em;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 34px 0 76px;
  }
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(300px, 1fr);
    gap: 64px;
    align-items: end;
    margin-top: 44px;
  }
  .page-about .about-anchors {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 常驻目录 ---------- */
.page-about .about-toc {
  position: sticky;
  top: 0;
  z-index: 6;
  background: var(--forest);
  border-top: 2px solid var(--amber);
  box-shadow: 0 2px 4px rgba(27, 23, 18, .12);
}

.page-about .about-toc__inner {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px 0 11px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-toc__inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc__label {
  flex: none;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--amber);
  border-right: 1px solid var(--rule-light);
  padding-right: 14px;
}

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

.page-about .about-toc__link {
  display: inline-block;
  white-space: nowrap;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--on-dark);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

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

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: 52px 0;
}

.page-about .about-section--tight {
  padding-top: 44px;
}

.page-about .about-section .section-title {
  margin: 8px 0 18px;
}

.page-about .about-intro {
  margin: 0 0 24px;
  max-width: 66ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-subhead {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.4;
  margin: 0 0 12px;
}

.page-about .about-chapter__body {
  display: grid;
  gap: 24px;
}

@media (min-width: 900px) {
  .page-about .about-section {
    padding: 88px 0;
  }
  .page-about .about-chapter__body {
    grid-template-columns: var(--about-side) minmax(0, 1fr);
    gap: 56px;
  }
  .page-about .about-chapter__body--split {
    grid-template-columns: minmax(0, 1fr) minmax(200px, 260px);
    margin-top: 40px;
  }
}

.page-about .about-chapter__side {
  padding-left: 16px;
  border-left: 1px solid var(--rule-strong);
}

.page-about .about-chapter__no {
  display: block;
  font-family: var(--font-data);
  font-size: 21px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--forest);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--amber);
  width: 44px;
}

.page-about .about-chapter__side-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-chapter__side--minor {
  border-left-color: var(--rule);
}

/* ---------- 旁注折叠 ---------- */
.page-about .about-note {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
}

.page-about .about-note__title {
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--forest);
  padding-left: 16px;
  position: relative;
}

.page-about .about-note__title::-webkit-details-marker {
  display: none;
}

.page-about .about-note__title::before {
  content: "+";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-data);
  font-weight: 700;
  color: var(--amber);
}

.page-about .about-note[open] .about-note__title::before {
  content: "–";
}

.page-about .about-note__text {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 章节色带 ---------- */
.page-about .about-band {
  border-top: 1px solid var(--amber);
  padding: 26px 0 28px;
}

.page-about .about-band--night {
  background: var(--night);
  background-image: repeating-linear-gradient(
    180deg,
    rgba(244, 239, 227, .035) 0px,
    rgba(244, 239, 227, .035) 1px,
    transparent 1px,
    transparent 4px
  );
}

.page-about .about-band__inner {
  display: flex;
  align-items: flex-start;
  gap: 22px;
}

.page-about .about-band__no {
  flex: none;
  font-family: var(--font-data);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--amber);
  padding-top: 4px;
}

.page-about .about-band .section-title {
  margin: 0;
}

.page-about .about-band__sub {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  max-width: 52ch;
}

@media (min-width: 900px) {
  .page-about .about-band {
    padding: 34px 0 36px;
  }
  .page-about .about-band__inner {
    gap: 34px;
  }
  .page-about .about-band__no {
    font-size: 24px;
  }
}

/* ---------- 十七年时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 26px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--rule-strong);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 34px;
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: -31px;
  top: 9px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--amber);
}

.page-about .about-timeline__period {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-about .about-timeline__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--about-flow);
  line-height: 1.36;
  margin: 0 0 10px;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: var(--about-lead);
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-timeline__more {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid var(--rule);
  max-width: var(--about-lead);
}

.page-about .about-timeline__more summary {
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--forest);
}

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

.page-about .about-timeline__more summary::before {
  content: "+ ";
  font-family: var(--font-data);
  font-weight: 700;
  color: var(--amber);
}

.page-about .about-timeline__more[open] summary::before {
  content: "– ";
}

.page-about .about-timeline__more p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-timeline {
    padding-left: 34px;
  }
  .page-about .about-timeline__dot {
    left: -39px;
  }
  .page-about .about-timeline__item {
    padding-bottom: 46px;
  }
}

/* ---------- 内容索引表 ---------- */
.page-about .about-filter-row {
  margin-bottom: 20px;
}

.page-about .about-index-scroll {
  overflow-x: auto;
  border: 1px solid var(--rule-strong);
  background: var(--paper);
  box-shadow: var(--shadow-1);
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index {
  width: 100%;
  min-width: 660px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .about-index__caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
  border-bottom: 1px solid var(--rule);
}

.page-about .about-index thead th {
  text-align: left;
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--forest);
  background: var(--sand);
  padding: 12px 16px;
  border-bottom: 1px solid var(--rule-strong);
  white-space: nowrap;
}

.page-about .about-index tbody th,
.page-about .about-index tbody td {
  padding: 15px 16px;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
  font-weight: 400;
}

.page-about .about-index tbody tr:nth-child(even) th,
.page-about .about-index tbody tr:nth-child(even) td {
  background: rgba(232, 220, 184, .22);
}

.page-about .about-index tbody tr:last-child th,
.page-about .about-index tbody tr:last-child td {
  border-bottom: none;
}

.page-about .about-index__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--forest);
  white-space: nowrap;
}

.page-about .about-index__num {
  font-family: var(--font-data);
  font-weight: 700;
  color: var(--brick);
  white-space: nowrap;
}

/* ---------- 流程步骤 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .about-steps__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
}

.page-about .about-steps__item:first-child {
  border-top: 1px solid var(--rule-strong);
}

.page-about .about-steps__no {
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--forest);
  padding-top: 4px;
  border-top: 2px solid var(--amber);
}

.page-about .about-steps__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  margin: 0 0 8px;
}

.page-about .about-steps__content p {
  margin: 0;
  max-width: var(--about-lead);
  font-size: 15.5px;
  line-height: 1.82;
}

@media (min-width: 900px) {
  .page-about .about-steps__item {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 24px;
    padding: 24px 0;
  }
}

/* ---------- 图像框 ---------- */
.page-about .about-figure {
  margin: 34px 0 0;
  border: 1px solid var(--rule-strong);
  overflow: hidden;
  background: var(--sand);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: grayscale(.88) contrast(1.04);
}

.page-about .about-figure__caption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-figure__tag {
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--brick);
}

.page-about .about-figure--portrait {
  max-width: 520px;
}

/* ---------- 团队角色 ---------- */
.page-about .about-roles {
  display: grid;
  gap: 1px;
  background: var(--rule);
  border-top: 1px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule-strong);
  margin-top: 28px;
}

.page-about .about-roles__item {
  background: var(--paper);
  padding: 22px 4px 24px;
}

.page-about .about-roles__period {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--brick);
  font-weight: 700;
}

.page-about .about-roles__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.42;
  margin: 0 0 10px;
}

.page-about .about-roles__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink);
}

@media (min-width: 760px) {
  .page-about .about-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-roles__item {
    padding: 24px 20px 28px;
  }
}

/* ---------- 合作条目 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .about-partners__item {
  display: grid;
  gap: 8px;
  padding: 22px 0;
  border-top: 1px solid var(--rule);
}

.page-about .about-partners__item:last-child {
  border-bottom: 1px solid var(--rule);
}

.page-about .about-partners__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.4;
  margin: 0;
  color: var(--forest);
  position: relative;
  padding-left: 16px;
}

.page-about .about-partners__name::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 8px;
  height: 2px;
  background: var(--amber);
}

.page-about .about-partners__text {
  margin: 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.85;
}

@media (min-width: 820px) {
  .page-about .about-partners__item {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 40px;
    align-items: baseline;
    padding: 26px 0;
  }
}

/* ---------- 页尾引导 ---------- */
.page-about .about-next {
  background: var(--night);
  background-image: repeating-linear-gradient(
    180deg,
    rgba(244, 239, 227, .04) 0px,
    rgba(244, 239, 227, .04) 1px,
    transparent 1px,
    transparent 4px
  );
  border-top: 1px solid var(--amber);
  padding: 48px 0 56px;
}

.page-about .about-next__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-next__eyebrow {
  color: var(--amber);
}

.page-about .about-next .section-title {
  margin: 10px 0 14px;
}

.page-about .about-next__text {
  margin: 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--rule-light);
}

.page-about .about-next__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 15px 0;
  border-top: 1px solid var(--rule-light);
  color: var(--on-dark);
  text-decoration: none;
  font-size: 15.5px;
  line-height: 1.6;
  transition: color .2s var(--ease), padding-left .2s var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  color: var(--amber);
  padding-left: 8px;
}

.page-about .about-next__arrow {
  flex: none;
  font-family: var(--font-data);
  color: var(--amber);
}

@media (min-width: 900px) {
  .page-about .about-next {
    padding: 72px 0 84px;
  }
  .page-about .about-next__grid {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 1.05fr);
    gap: 72px;
    align-items: start;
  }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__link,
  .page-about .about-next__link {
    transition: none;
  }
  .page-about .about-toc__link:hover,
  .page-about .about-toc__link:focus-visible,
  .page-about .about-next__link:hover,
  .page-about .about-next__link:focus-visible {
    padding-left: 0;
  }
}