/* ===== 品牌档案页 · page-about ===== */
.page-about {
  --about-line: rgba(14, 59, 62, 0.14);
  --about-line-light: rgba(243, 237, 228, 0.2);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 36px) 0 clamp(48px, 8vw, 92px);
  background:
    radial-gradient(ellipse 72% 58% at 84% 6%, rgba(20, 85, 90, 0.92), transparent 66%),
    radial-gradient(ellipse 62% 54% at 4% 96%, rgba(122, 33, 25, 0.62), transparent 62%),
    var(--teal);
  color: var(--paper);
}

.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(24px, 5vw, 44px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(243, 237, 228, 0.66);
}

.page-about .breadcrumbs__item a {
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 242, 78, 0.5);
  padding-bottom: 1px;
}

.page-about .breadcrumbs__item a:hover {
  color: var(--lime);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 6vw, 56px);
  align-items: end;
}

.page-about .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-size: clamp(30px, 5.2vw, 50px);
  line-height: 1.18;
  font-weight: 700;
  letter-spacing: -0.01em;
  max-width: 20em;
}

.page-about .about-hero .lede {
  margin: 0 0 28px;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.8;
  color: rgba(243, 237, 228, 0.85);
}

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

.page-about .about-hero__panel {
  padding: clamp(20px, 3.5vw, 28px);
  border: 1px solid var(--about-line-light);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.page-about .about-hero__panel-title {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: rgba(243, 237, 228, 0.6);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-figures__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 12px;
  border-left: 2px solid var(--laterite);
}

.page-about .about-figures__num {
  font-family: var(--font-num);
  font-size: clamp(26px, 4.4vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-figures__label {
  font-size: 13px;
  line-height: 1.5;
  color: rgba(243, 237, 228, 0.72);
}

/* ---------- 斜切色带 ---------- */
.page-about .about-band {
  height: 12px;
  background: linear-gradient(90deg, var(--laterite) 0%, var(--laterite-deep) 62%, var(--teal-2) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 52%, 0 100%);
}

.page-about .about-band--flip {
  clip-path: polygon(0 46%, 100% 0, 100% 100%, 0 100%);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding: clamp(56px, 9vw, 104px) 0;
}

.page-about .about-sec--paper {
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-sec--teal {
  background:
    radial-gradient(ellipse 80% 60% at 96% 0%, rgba(20, 85, 90, 0.7), transparent 62%),
    var(--teal);
  color: var(--paper);
}

.page-about .about-chapter__head {
  margin-bottom: clamp(24px, 4vw, 40px);
  padding-bottom: clamp(16px, 3vw, 24px);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-sec--teal .about-chapter__head {
  border-bottom-color: var(--about-line-light);
}

.page-about .about-chapter__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-num);
  font-size: clamp(52px, 10vw, 92px);
  font-weight: 700;
  line-height: 0.82;
  letter-spacing: -0.02em;
  color: var(--laterite);
}

.page-about .about-chapter__title {
  margin: 0 0 10px;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-chapter__sub {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(27, 31, 30, 0.66);
}

.page-about .about-sec--teal .about-chapter__sub {
  color: rgba(243, 237, 228, 0.68);
}

.page-about .about-chapter__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-prose {
  display: grid;
  gap: 16px;
  max-width: 40em;
}

.page-about .about-prose p,
.page-about .about-pipeline__text p,
.page-about .about-partners__text p,
.page-about .about-yunnan__text p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-caption {
  margin: 0;
  max-width: 44em;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(27, 31, 30, 0.62);
}

.page-about .about-sec--teal .about-caption {
  color: rgba(243, 237, 228, 0.64);
}

/* ---------- 章节 01 侧卡 ---------- */
.page-about .about-users {
  align-self: start;
  padding: clamp(20px, 3vw, 26px);
}

.page-about .about-users .card__title {
  margin: 0 0 14px;
  font-size: 18px;
}

.page-about .about-users__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(27, 31, 30, 0.76);
}

.page-about .about-users__list strong {
  display: block;
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 章节 02 阶段折叠 ---------- */
.page-about .about-stages,
.page-about .about-tagset {
  display: grid;
  gap: 12px;
}

.page-about .about-stages__tools {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 4px;
}

.page-about .about-stage {
  border-top: 1px solid var(--about-line-light);
}

.page-about .about-sec--paper .about-stage,
.page-about .about-sec--paper .about-taggroup {
  border-top-color: var(--about-line);
}

.page-about .about-stage__heading {
  margin: 0;
  font-size: inherit;
  font-weight: 400;
}

.page-about .about-stage__trigger {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 4px;
  background: transparent;
  border: 0;
  color: inherit;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
}

.page-about .about-stage__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--lime);
  min-width: 4.5em;
}

.page-about .about-sec--paper .about-stage__idx {
  color: var(--laterite);
}

.page-about .about-stage__name {
  font-size: clamp(17px, 2.4vw, 20px);
  font-weight: 600;
  line-height: 1.4;
}

.page-about .about-stage__mark {
  position: relative;
  width: 16px;
  height: 16px;
  flex: none;
}

.page-about .about-stage__mark::before,
.page-about .about-stage__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: currentColor;
  transform: translate(-50%, -50%);
  transition: transform 180ms var(--ease), opacity 180ms var(--ease);
}

.page-about .about-stage__mark::before {
  width: 14px;
  height: 2px;
}

.page-about .about-stage__mark::after {
  width: 2px;
  height: 14px;
}

.page-about .about-stage__trigger[aria-expanded="true"] .about-stage__mark::after,
.page-about .about-stage__trigger[aria-expanded="true"] .about-stage__mark::before {
  opacity: 0.35;
}

.page-about .about-stage__trigger:hover {
  color: var(--lime);
}

.page-about .about-sec--paper .about-stage__trigger:hover {
  color: var(--laterite);
}

.page-about .about-stage__panel {
  padding: 0 4px 22px;
}

.page-about .about-stage__panel p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(243, 237, 228, 0.78);
}

.page-about .about-sec--paper .about-stage__panel p {
  color: rgba(27, 31, 30, 0.74);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  filter: saturate(0.92) contrast(1.04);
}

.page-about .about-figure .media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: rgba(27, 31, 30, 0.56);
}

.page-about .about-sec--teal .about-figure .media__caption {
  color: rgba(243, 237, 228, 0.58);
}

/* ---------- 章节 03 表格 ---------- */
.page-about .about-table-wrap {
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.55);
}

.page-about .about-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .about-table__caption {
  padding: 14px 16px 0;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(27, 31, 30, 0.56);
}

.page-about .about-table th,
.page-about .about-table td {
  padding: 15px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--about-line);
  line-height: 1.65;
}

.page-about .about-table thead th {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  font-weight: 500;
  color: var(--teal);
  background: rgba(14, 59, 62, 0.06);
}

.page-about .about-table tbody th {
  font-weight: 600;
  white-space: nowrap;
  color: var(--ink);
}

.page-about .about-table tbody tr {
  transition: background 160ms var(--ease), box-shadow 160ms var(--ease);
}

.page-about .about-table tbody tr:hover {
  background: rgba(178, 58, 46, 0.08);
  box-shadow: inset 3px 0 0 var(--laterite);
}

.page-about .about-table .num {
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--laterite);
  white-space: nowrap;
}

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

/* ---------- 章节 04 流水线 ---------- */
.page-about .about-pipeline {
  display: grid;
  gap: clamp(22px, 4vw, 34px);
}

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

.page-about .about-flow__rail line {
  stroke: rgba(198, 242, 78, 0.3);
  stroke-width: 2;
  stroke-dasharray: 7 8;
}

.page-about .about-flow__node rect {
  fill: rgba(255, 255, 255, 0.06);
  stroke: rgba(243, 237, 228, 0.24);
  stroke-width: 1;
  transition: fill 180ms var(--ease), stroke 180ms var(--ease);
}

.page-about .about-flow__node:hover rect {
  fill: rgba(198, 242, 78, 0.1);
  stroke: rgba(198, 242, 78, 0.6);
}

.page-about .about-flow__name {
  fill: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
}

.page-about .about-flow__meta {
  fill: var(--lime);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-about .about-pipeline__text {
  display: grid;
  gap: 16px;
  max-width: 40em;
}

.page-about .about-sec--teal .about-pipeline__text p {
  color: rgba(243, 237, 228, 0.82);
}

/* ---------- 章节 05 标签 ---------- */
.page-about .about-tags__intro {
  display: grid;
  gap: 16px;
  max-width: 40em;
}

.page-about .about-taggroup {
  border-top: 1px solid var(--about-line);
}

.page-about .about-taglist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  max-width: 46em;
}

.page-about .about-taglist .tag {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.6);
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}

.page-about .about-taglist .tag:hover {
  border-color: var(--violet);
  color: var(--violet);
}

.page-about .about-taglist .tag--lime {
  border-color: rgba(178, 58, 46, 0.4);
  color: var(--laterite);
}

/* ---------- 章节 06 合作 ---------- */
.page-about .about-partner-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.page-about .about-stat {
  padding: 18px 16px;
  border: 1px solid var(--about-line-light);
  border-radius: var(--radius);
  background: var(--glass);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stat .stat__num {
  font-family: var(--font-num);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-stat .stat__label {
  font-size: 13px;
  line-height: 1.55;
  color: rgba(243, 237, 228, 0.72);
}

.page-about .about-partners__text {
  display: grid;
  gap: 16px;
  max-width: 42em;
}

.page-about .about-sec--teal .about-partners__text p {
  color: rgba(243, 237, 228, 0.84);
}

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

/* ---------- 章节 07 云南 ---------- */
.page-about .about-yunnan__text {
  display: grid;
  gap: 16px;
  max-width: 40em;
}

.page-about .about-place {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-place__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-place__key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--laterite);
}

.page-about .about-place__val {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 结尾导航 ---------- */
.page-about .about-next {
  padding: clamp(48px, 8vw, 88px) 0;
  background:
    linear-gradient(160deg, var(--teal-2) 0%, var(--teal) 62%, var(--laterite-deep) 100%);
  color: var(--paper);
}

.page-about .about-next__title {
  margin: 0 0 clamp(22px, 4vw, 36px);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.3;
  font-weight: 700;
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-next__card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 16px;
  row-gap: 6px;
  padding: 20px;
  border: 1px solid var(--about-line-light);
  border-radius: var(--radius);
  background: var(--glass);
  color: inherit;
  text-decoration: none;
  transition: border-color 180ms var(--ease), transform 180ms var(--ease), background 180ms var(--ease);
}

.page-about .about-next__card:hover {
  border-color: var(--lime);
  background: var(--glass-strong);
  transform: translateY(-2px);
}

.page-about .about-next__idx {
  grid-row: 1 / span 2;
  align-self: center;
  font-family: var(--font-num);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-next__name {
  font-size: 18px;
  font-weight: 600;
}

.page-about .about-next__desc {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(243, 237, 228, 0.72);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-partner-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-place__row {
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 5fr 7fr;
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .about-chapter__body {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-chapter__body--split {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  }

  .page-about .about-chapter__body > .about-prose,
  .page-about .about-chapter__body > .about-tags__intro,
  .page-about .about-chapter__body > .about-yunnan__text {
    grid-column: 1;
  }

  .page-about .about-users,
  .page-about .about-place {
    grid-column: 2;
  }

  .page-about .about-partner-stats,
  .page-about .about-partners__text,
  .page-about .about-cta-inline,
  .page-about .about-figure,
  .page-about .about-tagset,
  .page-about .about-table-wrap,
  .page-about .about-caption {
    grid-column: 1 / -1;
  }

  .page-about .about-figure--side {
    grid-column: 2;
  }

  .page-about .about-chapter__head {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    column-gap: clamp(20px, 3vw, 40px);
    align-items: start;
  }

  .page-about .about-chapter__num {
    grid-row: 1 / span 2;
    margin-bottom: 0;
    margin-top: -6px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-chapter__body {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  }

  .page-about .about-chapter__head {
    grid-template-columns: 180px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-next__card,
  .page-about .about-flow__node rect,
  .page-about .about-table tbody tr {
    transition: none;
  }

  .page-about .about-next__card:hover {
    transform: none;
  }
}