/* ===== 品牌档案页 · page-about ===== */
.page-about {
  --about-rail: 264px;
  --about-gap: clamp(32px, 5vw, 76px);
  --about-block: clamp(56px, 8vw, 104px);
  color: var(--paper);
  background: var(--wood-base);
}

.page-about :focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

.page-about .about-inline-link {
  color: var(--electric);
  text-decoration: underline;
  text-decoration-color: rgba(63, 169, 245, 0.4);
  text-underline-offset: 3px;
  transition: color 0.18s var(--ease), text-decoration-color 0.18s var(--ease);
}

.page-about .about-inline-link:hover {
  color: var(--paper);
  text-decoration-color: var(--signal);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(18px, 3vw, 32px) clamp(40px, 6vw, 80px);
  isolation: isolate;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: radial-gradient(120% 100% at 15% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(120% 100% at 15% 0%, #000 0%, transparent 74%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: end;
}

.page-about .about-hero__kicker {
  margin: 0 0 16px;
  color: var(--grass);
}

.page-about .about-hero h1 {
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(32px, 5.6vw, 68px);
  line-height: 1.06;
  letter-spacing: -0.022em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  max-width: 42ch;
  margin: 0 0 clamp(26px, 3.6vw, 42px);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--paper);
  opacity: 0.82;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(12px, 2vw, 28px);
  margin: 0;
  padding-top: clamp(16px, 2.2vw, 24px);
  border-top: 1px solid var(--line);
}

.page-about .about-hero__stat dt {
  margin: 0 0 8px;
  color: var(--ash);
}

.page-about .about-hero__stat dd,
.page-about .about-hero__stat-num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(22px, 3.4vw, 38px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-hero__stat:last-child .about-hero__stat-num {
  color: var(--grass);
}

.page-about .about-hero__media {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--wood-layer);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ---------- 主体：目录 + 长文 ---------- */
.page-about .about-body {
  padding-block: clamp(8px, 2vw, 24px) clamp(64px, 9vw, 120px);
}

.page-about .about-toc {
  margin-bottom: clamp(36px, 6vw, 56px);
  padding: clamp(18px, 3vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--wood-layer);
}

.page-about .about-toc__title {
  margin: 0 0 14px;
  color: var(--ash);
}

.page-about .about-toc__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-toc__list a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  color: var(--paper);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-toc__list a:hover {
  background: var(--wood-high);
  color: var(--grass);
}

.page-about .about-toc__num {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ash);
}

.page-about .about-content {
  min-width: 0;
}

.page-about .about-sec {
  margin-bottom: var(--about-block);
  scroll-margin-top: 120px;
}

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

.page-about .about-sec--layer,
.page-about .about-sec--turf {
  padding: clamp(22px, 4vw, 44px);
  border-radius: var(--r-lg);
}

.page-about .about-sec--layer {
  background: var(--wood-layer);
}

.page-about .about-sec--turf {
  background: var(--turf-deep);
}

.page-about .about-sec__head {
  display: flex;
  gap: clamp(12px, 2vw, 20px);
  align-items: baseline;
  margin-bottom: clamp(20px, 3vw, 30px);
  padding-bottom: clamp(12px, 2vw, 18px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-sec__num {
  flex: none;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--ash);
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.018em;
  color: var(--paper);
}

.page-about .about-sec p {
  max-width: 40ch;
  margin: 0 0 18px;
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.78;
  color: rgba(242, 237, 230, 0.82);
}

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

.page-about .about-sec__media {
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--wood-base);
}

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

/* ---------- 刻度带 ---------- */
.page-about .about-ruler {
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
}

.page-about .about-ruler__node {
  position: relative;
  padding-left: 22px;
  border-left: 1px solid var(--line-strong);
}

.page-about .about-ruler__node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: var(--pill);
  background: var(--turf-mid);
}

.page-about .about-ruler__node--now::before {
  background: var(--signal);
  box-shadow: 0 0 0 4px rgba(255, 122, 26, 0.16);
}

.page-about .about-ruler__mark {
  display: block;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--grass);
}

.page-about .about-ruler__text {
  display: block;
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ash);
}

/* ---------- 岗位表 ---------- */
.page-about .about-table {
  width: 100%;
  margin-top: clamp(18px, 3vw, 28px);
  border-collapse: collapse;
  text-align: left;
}

.page-about .about-table th,
.page-about .about-table td {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  font-weight: 400;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(242, 237, 230, 0.82);
}

.page-about .about-table thead th {
  padding-block: 8px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ash);
  border-bottom-color: var(--line-strong);
}

.page-about .about-table__role {
  padding-right: 14px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-table__num {
  padding-right: 20px;
  font-family: var(--font-mono);
  font-size: 19px;
  color: var(--grass);
  white-space: nowrap;
}

.page-about .about-table tbody tr:last-child th,
.page-about .about-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 五步流程 ---------- */
.page-about .about-flow {
  display: grid;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow__step {
  position: relative;
  padding: 20px 0 20px 54px;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-flow__idx {
  position: absolute;
  left: 0;
  top: 23px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--grass);
}

.page-about .about-flow__step:last-child .about-flow__idx {
  top: 23px;
}

.page-about .about-flow__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 21px);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-flow__step p {
  max-width: 38ch;
  margin: 0;
  font-size: 15px;
}

/* ---------- 版本刻度 ---------- */
.page-about .about-versions {
  display: grid;
  gap: clamp(30px, 3.4vw, 40px);
  margin: clamp(30px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-versions__head {
  position: relative;
  height: 16px;
  margin-bottom: 18px;
}

.page-about .about-versions__head::before {
  content: "";
  position: absolute;
  top: 7px;
  left: 0;
  right: -32px;
  height: 1px;
  background: var(--line-strong);
}

.page-about .about-versions__item:last-child .about-versions__head::before {
  right: 0;
}

.page-about .about-versions__dot {
  position: absolute;
  top: 0;
  left: 0;
  width: 15px;
  height: 15px;
  border-radius: var(--pill);
  background: var(--turf-mid);
  box-shadow: 0 0 0 4px rgba(31, 107, 79, 0.18);
}

.page-about .about-versions__item--current .about-versions__dot {
  background: var(--signal);
  box-shadow: 0 0 0 5px rgba(255, 122, 26, 0.16);
}

.page-about .about-versions__ver {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ash);
}

.page-about .about-versions__item--current .about-versions__ver {
  color: var(--signal);
}

.page-about .about-versions__name {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(16px, 2vw, 19px);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-versions__note {
  margin: 0;
  max-width: 36ch;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(242, 237, 230, 0.72);
}

.page-about .about-versions__more {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.page-about .about-versions__more summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--electric);
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-versions__more summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 14px;
}

.page-about .about-versions__more[open] summary::after {
  content: "\2212";
}

.page-about .about-versions__more p {
  max-width: 36ch;
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ash);
}

/* ---------- 合作数据 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 26px;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partners__item {
  padding-left: 18px;
  border-left: 2px solid var(--turf-mid);
}

.page-about .about-partners__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-partners__label {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  color: var(--grass);
}

.page-about .about-partners__note {
  max-width: 34ch;
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ash);
}

/* ---------- 三条守则 ---------- */
.page-about .about-pledge {
  display: grid;
  gap: clamp(26px, 3.2vw, 36px);
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-pledge__item {
  padding-top: 20px;
  border-top: 2px solid var(--turf-mid);
}

.page-about .about-pledge__num {
  display: block;
  margin-bottom: 12px;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--ash);
}

.page-about .about-pledge__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 21px);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-pledge__item p {
  max-width: 34ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(242, 237, 230, 0.78);
}

/* ---------- 收束带 ---------- */
.page-about .about-cta {
  padding-block: clamp(40px, 6vw, 76px);
  background: var(--turf-deep);
  border-top: 1px solid var(--line);
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.018em;
  color: var(--paper);
}

.page-about .about-cta__text p {
  max-width: 42ch;
  margin: 0;
  font-size: clamp(15px, 1.55vw, 16px);
  line-height: 1.76;
  color: rgba(242, 237, 230, 0.78);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 窄屏：岗位表转为纵向清单 ---------- */
@media (max-width: 719px) {
  .page-about .about-table,
  .page-about .about-table tbody,
  .page-about .about-table tr,
  .page-about .about-table th,
  .page-about .about-table td {
    display: block;
    width: 100%;
  }

  .page-about .about-table thead {
    display: none;
  }

  .page-about .about-table tr {
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
  }

  .page-about .about-table tbody tr:last-child {
    padding-bottom: 0;
  }

  .page-about .about-table__role {
    padding: 0 0 4px;
    border-bottom: 0;
    font-size: 16px;
  }

  .page-about .about-table__num {
    padding: 0 0 10px;
    border-bottom: 0;
    font-size: 18px;
  }

  .page-about .about-table__num::after {
    content: " 人";
    margin-left: 6px;
    font-family: var(--font-body);
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--ash);
  }

  .page-about .about-table__desc {
    padding: 0;
    border-bottom: 0;
  }

  .page-about .about-versions__head::before {
    display: none;
  }
}

/* ---------- 中等屏：双栏网格 ---------- */
@media (min-width: 720px) {
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px 40px;
  }

  .page-about .about-ruler {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 32px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.72fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-versions {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 32px;
  }

  .page-about .about-pledge {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: clamp(28px, 4vw, 64px);
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
    max-width: 320px;
  }
}

/* ---------- 宽屏：吸附式左侧目录 ---------- */
@media (min-width: 1024px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: 118px;
    margin-bottom: 0;
  }

  .page-about .about-sec--layer,
  .page-about .about-sec--turf {
    padding: clamp(32px, 3.6vw, 52px);
  }
}