/* ===================================================
   page-about · 品牌使命
   作用域：.page-about
   =================================================== */

.page-about {
  --about-warm: #FF6A2B;
  --about-rule: rgba(28, 79, 128, .18);
  --about-rule-soft: rgba(28, 79, 128, .10);
  display: block;
  color: var(--ink-900);
  font-family: var(--font-body);
}

.page-about .container {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.page-about > .container > .breadcrumb {
  margin-top: calc(var(--header-space) + 8px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 32px 0 56px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  align-items: end;
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--navy-500);
}

.page-about .about-hero__eyebrow .about-hero__num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--orange-700);
  letter-spacing: .04em;
}

.page-about .about-hero h1 {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7vw, 58px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ink-900);
  max-width: 17em;
}

.page-about .about-hero__intro {
  margin: 0 0 32px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--navy-700);
}

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

.page-about .about-hero__figure {
  position: relative;
  padding: 8px 0 0;
  overflow: hidden;
}

.page-about .about-hero__year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(78px, 19vw, 200px);
  line-height: .82;
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 2px var(--orange-500);
  text-stroke: 2px var(--orange-500);
}

.page-about .about-hero__capture {
  display: block;
  margin-top: 14px;
  padding-left: 14px;
  position: relative;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--blue-300);
}

.page-about .about-hero__capture::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 8px;
  height: 1px;
  background: var(--blue-300);
}

/* ---------- 章节通用 ---------- */
.page-about .about-block {
  padding: 64px 0;
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-block__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-bottom: 40px;
}

.page-about .about-block__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4.6vw, 40px);
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--ink-900);
  max-width: 22em;
}

.page-about .about-block__head .section-index {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--orange-500);
  text-stroke: 1.5px var(--orange-500);
  font-family: var(--font-mono);
}

.page-about .about-block__sub {
  margin: 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--navy-500);
}

/* ---------- 01 定位 ---------- */
.page-about .about-position__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

.page-about .about-position__text p {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-900);
}

.page-about .about-position__lead {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 24px) !important;
  line-height: 1.55 !important;
  letter-spacing: -.01em;
  color: var(--navy-900) !important;
  padding-left: 18px;
  border-left: 3px solid var(--orange-500);
}

.page-about .about-position__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-position__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-rule);
  font-size: 15px;
  line-height: 1.7;
  color: var(--navy-700);
}

.page-about .about-position__media {
  margin: 0;
}

.page-about .about-position__media .media__frame {
  --media-ratio: 1400 / 900;
}

/* ---------- 02 区域 ---------- */
.page-about .about-region__banner {
  margin: 0 0 28px;
}

.page-about .about-region__banner .media__frame {
  --media-ratio: 1600 / 700;
}

.page-about .region-matrix {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .region-cell {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
  min-height: 96px;
  padding: 18px 16px;
  background: rgba(233, 239, 246, .5);
  transition: background 200ms var(--ease);
}

.page-about .region-cell:nth-child(3n) {
  background: rgba(233, 239, 246, .95);
}

.page-about .region-cell:nth-child(5n) {
  background: rgba(220, 231, 242, .7);
}

.page-about .region-cell__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -.01em;
  color: var(--navy-900);
}

.page-about .region-cell__note {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--blue-300);
}

.page-about .region-cell--focus {
  background: var(--navy-900);
  box-shadow: inset 0 0 0 2px var(--orange-500);
}

.page-about .region-cell--focus .region-cell__name {
  font-size: 26px;
  color: var(--paper);
}

.page-about .region-cell--focus .region-cell__note {
  color: rgba(252, 253, 255, .72);
  letter-spacing: .06em;
}

.page-about .region-note {
  margin: 26px 0 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--navy-500);
  padding-left: 16px;
  border-left: 1px solid var(--about-rule);
}

/* ---------- 03 发展阶段 ---------- */
.page-about .stages__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .stages__rail {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 8px;
  align-self: start;
  padding: 0;
}

.page-about .stages__rail .rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--about-rule);
  text-decoration: none;
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .stages__rail .rail__index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange-700);
}

.page-about .stages__rail .rail__label {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--navy-700);
}

.page-about .stages__rail .rail__link:hover,
.page-about .stages__rail .rail__link:focus-visible {
  border-color: var(--orange-500);
  background: rgba(255, 106, 43, .06);
}

.page-about .stages__flow {
  display: grid;
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .stage {
  padding: 28px 20px;
  background: var(--paper);
}

.page-about .stage__marker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.page-about .stage__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 6vw, 40px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--orange-500);
}

.page-about .stage__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.8vw, 22px);
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--ink-900);
}

.page-about .stage__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--navy-700);
}

/* ---------- 04 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .about-team__media {
  margin: 0;
}

.page-about .about-team__media .media__frame {
  --media-ratio: 900 / 1100;
}

.page-about .about-team__content p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-900);
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 30px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .team-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--mist-100);
}

.page-about .team-stat__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 5vw, 30px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--navy-900);
}

.page-about .team-stat__label {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--navy-500);
}

/* ---------- 05 流程 ---------- */
.page-about .process-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .process-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 20px;
  background: var(--paper);
}

.page-about .process-card__mark {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(24px, 5.4vw, 34px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--orange-500);
}

.page-about .process-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -.01em;
  color: var(--navy-900);
}

.page-about .process-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--navy-700);
}

/* ---------- 06 选择理由 ---------- */
.page-about .why-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .why-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 20px;
  background: var(--paper);
  text-decoration: none;
  color: inherit;
  transition: background 200ms var(--ease);
}

.page-about .why-card:hover,
.page-about .why-card:focus-visible {
  background: var(--mist-100);
}

.page-about .why-card__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--blue-300);
}

.page-about .why-card__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--navy-900);
}

.page-about .why-card__text {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--navy-700);
}

.page-about .why-card__go {
  margin-top: auto;
  padding-top: 12px;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--orange-700);
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .why-card:hover .why-card__go,
.page-about .why-card:focus-visible .why-card__go {
  color: var(--orange-500);
}

/* ---------- 窄屏保护 ---------- */
.page-about img,
.page-about svg {
  max-width: 100%;
  height: auto;
}

.page-about .about-hero__grid > *,
.page-about .about-position__grid > *,
.page-about .about-team__grid > *,
.page-about .stages__layout > * {
  min-width: 0;
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 640px) {
  .page-about .region-matrix {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .region-cell--focus {
    grid-column: span 2;
    min-height: 140px;
  }

  .page-about .process-grid,
  .page-about .why-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about > .container > .breadcrumb {
    margin-top: calc(var(--header-space) + 16px);
  }

  .page-about .about-hero {
    padding: 48px 0 88px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
  }

  .page-about .about-hero__figure {
    padding-top: 0;
  }

  .page-about .about-block {
    padding: 96px 0;
  }

  .page-about .about-block__head {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: baseline;
    gap: 28px;
    margin-bottom: 56px;
  }

  .page-about .about-position__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .stages__layout {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 0;
  }

  .page-about .stages__rail {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
    position: sticky;
    top: calc(var(--header-space) + 24px);
    padding-right: 24px;
    border-right: 1px solid var(--about-rule);
  }

  .page-about .stages__rail .rail__link {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    border: 0;
    border-bottom: 1px solid var(--about-rule-soft);
    padding: 16px 0;
    background: transparent;
  }

  .page-about .stages__rail .rail__link:hover,
  .page-about .stages__rail .rail__link:focus-visible {
    background: transparent;
    border-bottom-color: var(--orange-500);
  }

  .page-about .stage {
    padding: 40px 36px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-team__stats {
    margin-top: 34px;
  }

  .page-about .region-note {
    margin-left: 24px;
  }
}

@media (min-width: 1180px) {
  .page-about .process-grid,
  .page-about .why-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .process-card,
  .page-about .why-card {
    padding: 34px 26px;
  }

  .page-about .region-cell {
    min-height: 116px;
  }

  .page-about .region-cell--focus {
    min-height: 160px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .region-cell,
  .page-about .why-card,
  .page-about .stages__rail .rail__link {
    transition: none;
  }
}
</main>