/* ===== 品牌概况页 · page-about ===== */

.page-about {
  --about-hair: rgba(16, 24, 32, 0.12);
  --about-hair-dark: rgba(255, 255, 255, 0.14);
  --about-soft: rgba(255, 255, 255, 0.05);
  --about-section-pad: clamp(48px, 9vw, 96px);
  background: var(--fh-paper);
  color: var(--fh-ink);
  font-family: var(--fh-font-body);
  overflow-x: hidden;
}

.page-about .about-hero,
.page-about .about-origin,
.page-about .about-timeline,
.page-about .about-team,
.page-about .about-network,
.page-about .about-honor,
.page-about .about-principles {
  padding-top: var(--about-section-pad);
  padding-bottom: var(--about-section-pad);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-top: clamp(84px, 13vw, 124px);
  background:
    radial-gradient(1000px 520px at 88% -18%, rgba(232, 69, 30, 0.45), transparent 64%),
    radial-gradient(720px 420px at 2% 114%, rgba(43, 224, 166, 0.16), transparent 68%),
    linear-gradient(158deg, var(--fh-night) 0%, var(--fh-night-2) 56%, var(--fh-night) 100%);
  color: var(--fh-paper);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--fh-flame), var(--fh-amber) 46%, var(--fh-mint));
}

.page-about .about-hero .fh-breadcrumb {
  margin-bottom: clamp(22px, 4vw, 36px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  margin-top: clamp(10px, 2vw, 18px);
}

.page-about .about-hero .fh-eyebrow {
  color: var(--fh-amber);
}

.page-about .about-hero .fh-display {
  margin: 14px 0 0;
  color: var(--fh-paper);
}

.page-about .about-hero .fh-lede {
  margin: 18px 0 0;
  max-width: 34em;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 4vw, 32px);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-hair-dark);
  border: 1px solid var(--about-hair-dark);
  border-radius: var(--fh-r-md);
  overflow: hidden;
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px 16px;
  background: rgba(11, 27, 43, 0.74);
}

.page-about .about-hero__num {
  font-family: var(--fh-font-mono);
  font-size: clamp(22px, 4.6vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--fh-amber);
}

.page-about .about-hero__meta {
  font-size: 12.5px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.68);
}

/* ---------- 品牌起点 ---------- */

.page-about .about-origin {
  background: var(--fh-paper);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
}

.page-about .about-origin__copy p {
  margin: 16px 0 0;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--fh-slate);
}

.page-about .about-origin__copy .fh-title {
  margin-top: 10px;
}

.page-about .about-origin__figure {
  position: relative;
  margin: 0;
}

.page-about .about-origin__figure::before {
  content: "";
  position: absolute;
  inset: 14px -14px -14px 14px;
  border: 1px solid var(--about-hair);
  border-radius: var(--fh-r-md);
  background: linear-gradient(140deg, rgba(232, 69, 30, 0.09), rgba(43, 224, 166, 0.07));
}

.page-about .about-origin__figure > * {
  position: relative;
  z-index: 1;
}

.page-about .about-origin__figure .fh-note {
  display: block;
  margin-top: 16px;
  color: var(--fh-slate);
}

/* ---------- 八年历程 ---------- */

.page-about .about-timeline {
  position: relative;
  color: var(--fh-paper);
  background:
    radial-gradient(900px 440px at 100% 0%, rgba(232, 69, 30, 0.24), transparent 62%),
    radial-gradient(700px 420px at 0% 100%, rgba(43, 224, 166, 0.1), transparent 66%),
    linear-gradient(180deg, var(--fh-night) 0%, #091624 100%);
}

.page-about .about-timeline .fh-eyebrow {
  color: var(--fh-amber);
}

.page-about .about-timeline .fh-title {
  margin-top: 10px;
  color: var(--fh-paper);
}

.page-about .about-timeline__head {
  max-width: 34em;
}

.page-about .about-timeline__figure {
  margin: clamp(24px, 4vw, 38px) 0 0;
  border: 1px solid var(--about-hair-dark);
  border-radius: var(--fh-r-md);
  overflow: hidden;
}

.page-about .about-timeline__years {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(20px, 3vw, 30px) 0 clamp(24px, 4vw, 36px);
}

.page-about .about-timeline__years a {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--about-hair-dark);
  border-radius: var(--fh-r-pill);
  font-family: var(--fh-font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  transition: color 0.2s var(--fh-ease), border-color 0.2s var(--fh-ease), background 0.2s var(--fh-ease);
}

.page-about .about-timeline__years a:hover,
.page-about .about-timeline__years a:focus-visible {
  color: var(--fh-paper);
  border-color: var(--fh-flame);
  background: rgba(232, 69, 30, 0.2);
}

.page-about .about-track {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 34px;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--fh-flame) 0%, rgba(232, 69, 30, 0.38) 58%, rgba(43, 224, 166, 0.55) 100%);
}

.page-about .about-track__item {
  position: relative;
  padding-bottom: clamp(18px, 3vw, 26px);
  scroll-margin-top: 130px;
}

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

.page-about .about-track__dot {
  position: absolute;
  left: -33px;
  top: 7px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--fh-flame);
  box-shadow: 0 0 0 4px rgba(232, 69, 30, 0.22);
}

.page-about .about-track__dot--mint {
  background: var(--fh-mint);
  box-shadow: 0 0 0 4px rgba(43, 224, 166, 0.22);
}

.page-about .about-track__year {
  display: block;
  margin-bottom: 8px;
  font-family: var(--fh-font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--fh-amber);
}

.page-about .about-track__card {
  position: relative;
  padding: 16px 18px 18px;
  border: 1px solid var(--about-hair-dark);
  border-radius: var(--fh-r-md);
  background: var(--about-soft);
  box-shadow: 8px 8px 0 -1px rgba(255, 255, 255, 0.05);
  transition: border-color 0.3s var(--fh-ease), background 0.3s var(--fh-ease);
}

.page-about .about-track__item:target .about-track__card {
  border-color: var(--fh-flame);
  background: rgba(232, 69, 30, 0.14);
}

.page-about .about-track__card h3 {
  margin: 0 0 8px;
  font-size: clamp(16px, 2.4vw, 19px);
  font-weight: 800;
  line-height: 1.45;
  color: var(--fh-paper);
}

.page-about .about-track__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.68);
}

/* ---------- 内容团队 ---------- */

.page-about .about-team {
  background: var(--fh-ash);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--about-hair);
  border-radius: var(--fh-r-md);
  overflow: hidden;
  box-shadow: 8px 8px 0 -1px rgba(16, 24, 32, 0.07);
}

.page-about .about-team__copy p {
  margin: 16px 0 0;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--fh-slate);
}

.page-about .about-team__copy .fh-title {
  margin-top: 10px;
}

.page-about .about-roles {
  display: grid;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .about-role {
  padding: 0 18px;
  border: 1px solid var(--about-hair);
  border-radius: var(--fh-r-md);
  background: var(--fh-paper);
  box-shadow: 5px 5px 0 -1px rgba(16, 24, 32, 0.06);
}

.page-about .about-role summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px 0;
  font-size: 16px;
  font-weight: 800;
  color: var(--fh-ink);
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-role summary::before {
  content: "+";
  flex: none;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: rgba(232, 69, 30, 0.13);
  color: var(--fh-flame);
  font-family: var(--fh-font-mono);
  font-size: 15px;
  line-height: 1;
}

.page-about .about-role[open] summary::before {
  content: "–";
  background: rgba(232, 69, 30, 0.2);
}

.page-about .about-role p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--fh-slate);
}

/* ---------- 服务网络 ---------- */

.page-about .about-network {
  background: var(--fh-paper);
}

.page-about .about-network__head {
  max-width: 40em;
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-about .about-network__head .fh-title {
  margin-top: 10px;
}

.page-about .about-network__head p {
  margin: 14px 0 0;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--fh-slate);
}

.page-about .about-network__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-network__cell {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 26px 20px 24px;
  border: 1px solid var(--about-hair);
  border-radius: var(--fh-r-md);
  background: linear-gradient(180deg, var(--fh-paper) 0%, #F6F8FB 100%);
  box-shadow: 6px 6px 0 -1px rgba(16, 24, 32, 0.05);
  overflow: hidden;
}

.page-about .about-network__cell::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--fh-flame), var(--fh-amber));
}

.page-about .about-network__num {
  font-family: var(--fh-font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--fh-flame);
}

.page-about .about-network__cell h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--fh-ink);
}

.page-about .about-network__cell p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--fh-slate);
}

/* ---------- 荣誉与合作 ---------- */

.page-about .about-honor {
  color: var(--fh-paper);
  background:
    radial-gradient(760px 420px at 84% 16%, rgba(232, 69, 30, 0.5), transparent 64%),
    radial-gradient(620px 380px at 4% 96%, rgba(43, 224, 166, 0.14), transparent 68%),
    linear-gradient(160deg, var(--fh-night) 0%, #0E2135 100%);
}

.page-about .about-honor__panel {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  align-items: start;
  padding: clamp(24px, 4vw, 46px);
  border: 1px solid var(--about-hair-dark);
  border-radius: var(--fh-r-lg);
  background: var(--about-soft);
  box-shadow: 10px 10px 0 -1px rgba(255, 255, 255, 0.05);
}

.page-about .about-honor__badge {
  display: grid;
  place-items: center;
  width: 118px;
  height: 118px;
  border-radius: 50%;
  border: 1px solid rgba(255, 176, 32, 0.42);
  background: radial-gradient(circle at 32% 28%, rgba(255, 176, 32, 0.32), rgba(232, 69, 30, 0.18) 62%, transparent 76%);
}

.page-about .about-honor .fh-eyebrow {
  color: var(--fh-amber);
}

.page-about .about-honor .fh-title {
  margin-top: 10px;
  color: var(--fh-paper);
}

.page-about .about-honor__text > p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-partners {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-partners li {
  padding: 12px 14px;
  border-left: 3px solid var(--fh-mint);
  border-radius: 0 var(--fh-r-sm) var(--fh-r-sm) 0;
  background: rgba(255, 255, 255, 0.05);
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.76);
}

.page-about .about-partners strong {
  color: var(--fh-paper);
  font-weight: 800;
}

/* ---------- 顺畅原则 ---------- */

.page-about .about-principles {
  background: linear-gradient(180deg, var(--fh-ash) 0%, var(--fh-paper) 78%);
}

.page-about .about-principles__head {
  max-width: 32em;
  margin-bottom: clamp(24px, 4vw, 38px);
}

.page-about .about-principles__head .fh-title {
  margin-top: 10px;
}

.page-about .about-principles__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-principles__list li {
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--about-hair);
  border-radius: var(--fh-r-md);
  background: var(--fh-paper);
  box-shadow: 5px 5px 0 -1px rgba(16, 24, 32, 0.05);
}

.page-about .about-principles__idx {
  display: block;
  margin-bottom: 10px;
  font-family: var(--fh-font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--fh-flame);
}

.page-about .about-principles__list h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--fh-ink);
}

.page-about .about-principles__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--fh-slate);
}

.page-about .about-principles__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 22px;
  margin-top: clamp(24px, 4vw, 36px);
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--about-hair);
  border-radius: var(--fh-r-md);
  background: var(--fh-paper);
  box-shadow: 8px 8px 0 -1px rgba(16, 24, 32, 0.06);
}

.page-about .about-principles__cta p {
  flex: 1 1 260px;
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--fh-ink);
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-hero__facts li {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

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

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-about .about-hero__facts li {
    padding: 18px 16px 20px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

  .page-about .about-track {
    padding-left: 0;
  }

  .page-about .about-track::before {
    left: 122px;
  }

  .page-about .about-track__item {
    display: grid;
    grid-template-columns: 100px minmax(0, 1fr);
    column-gap: 46px;
    padding-bottom: 22px;
  }

  .page-about .about-track__dot {
    left: 113px;
    top: 6px;
  }

  .page-about .about-track__year {
    margin: 0;
    padding-top: 3px;
    text-align: right;
    font-size: 14px;
  }

  .page-about .about-track__card {
    grid-column: 2;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

  .page-about .about-honor__panel {
    grid-template-columns: minmax(0, 0.32fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-principles__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-track__item {
    grid-template-columns: 120px minmax(0, 1fr);
    column-gap: 54px;
  }

  .page-about .about-track::before {
    left: 132px;
  }

  .page-about .about-track__dot {
    left: 123px;
  }

  .page-about .about-origin__copy p,
  .page-about .about-team__copy p {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__years a,
  .page-about .about-track__card,
  .page-about .about-role summary::before {
    transition: none;
  }
}