.page-about {
  --about-hair: rgba(185, 195, 214, 0.22);
  --about-hair-sand: rgba(227, 180, 92, 0.42);
  --about-ink-soft: #46506B;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(30px, 4vw, 52px);
}

.page-about .about-hero__frame {
  position: relative;
  margin-top: 24px;
  padding: 30px 20px 34px;
  border: 1px solid var(--about-hair);
  background:
    linear-gradient(var(--c-sand), var(--c-sand)) left 0 top 0 / 24px 2px no-repeat,
    linear-gradient(var(--c-sand), var(--c-sand)) left 0 top 0 / 2px 24px no-repeat,
    linear-gradient(var(--c-sand), var(--c-sand)) right 0 top 0 / 24px 2px no-repeat,
    linear-gradient(var(--c-sand), var(--c-sand)) right 0 top 0 / 2px 24px no-repeat,
    linear-gradient(var(--c-sand), var(--c-sand)) left 0 bottom 0 / 24px 2px no-repeat,
    linear-gradient(var(--c-sand), var(--c-sand)) left 0 bottom 0 / 2px 24px no-repeat,
    linear-gradient(var(--c-sand), var(--c-sand)) right 0 bottom 0 / 24px 2px no-repeat,
    linear-gradient(var(--c-sand), var(--c-sand)) right 0 bottom 0 / 2px 24px no-repeat,
    radial-gradient(120% 90% at 88% -10%, rgba(255, 122, 61, 0.13), transparent 62%);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: var(--fs-h1);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--c-white);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--c-gray);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__media {
  margin: 26px 0 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
  filter: saturate(0.85) contrast(1.05);
}

.page-about .about-stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px 20px;
  background: var(--c-ink);
}

.page-about .about-stat__num {
  font-size: 26px;
  line-height: 1.1;
  color: var(--c-orange);
}

.page-about .about-stat__label {
  font-size: var(--fs-small);
  color: var(--c-gray);
}

@media (min-width: 900px) {
  .page-about .about-hero__frame {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 44px;
    align-items: center;
    padding: 46px 44px 50px;
  }

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

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

/* ---------- 我们做什么 ---------- */
.page-about .about-do__body {
  max-width: 70ch;
}

.page-about .about-do__body p {
  margin: 16px 0 0;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--c-gray);
}

.page-about .about-quote {
  margin: 28px 0 0;
  padding: 22px 22px 24px;
  border-left: 2px solid var(--c-orange);
  background: linear-gradient(135deg, rgba(255, 122, 61, 0.12), rgba(255, 122, 61, 0));
  font-family: var(--font-title);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.6;
  color: var(--c-white);
}

/* ---------- 栏目体系 ---------- */
.page-about .about-system__figure {
  margin: 30px 0 30px;
}

.page-about .about-system__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 26px 100%, 0 calc(100% - 26px));
  filter: saturate(0.8) contrast(1.05);
}

.page-about .about-system__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-system__item {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 20px 20px 22px;
}

.page-about .about-system__num {
  font-size: var(--fs-index);
  letter-spacing: var(--track);
  color: var(--c-sand);
}

.page-about .about-system__name {
  margin: 0;
  font-family: var(--font-title);
  font-size: var(--fs-h3);
  line-height: 1.4;
  color: var(--c-white);
}

.page-about .about-system__desc {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--c-gray);
}

@media (min-width: 760px) {
  .page-about .about-system__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 20px;
  }

  .page-about .about-system__item:nth-child(even) {
    margin-top: 24px;
  }

  .page-about .about-system__item:nth-child(5) {
    grid-column: 1 / -1;
    margin-top: 6px;
  }
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__body .section-lead {
  margin-top: 14px;
}

.page-about .about-track__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-about .about-track__nav a {
  display: inline-block;
  padding: 6px 13px;
  border: 1px solid var(--about-hair);
  color: var(--c-gray);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: var(--track);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-track__nav a:hover,
.page-about .about-track__nav a:focus-visible {
  border-color: var(--c-orange);
  background: var(--c-orange-soft);
  color: var(--c-white);
}

.page-about .about-track {
  list-style: none;
  position: relative;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 24px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-sand) 0%, rgba(227, 180, 92, 0.35) 55%, rgba(227, 180, 92, 0.06) 100%);
}

.page-about .about-track__item {
  position: relative;
  padding-left: 34px;
  margin-bottom: 18px;
  scroll-margin-top: 110px;
}

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

.page-about .about-track__dot {
  position: absolute;
  left: 1px;
  top: 18px;
  width: 15px;
  height: 15px;
  background: var(--c-ink);
  border: 2px solid var(--c-sand);
  transform: rotate(45deg);
}

.page-about .about-track__item:last-child .about-track__dot {
  background: var(--c-orange);
  border-color: var(--c-orange);
}

.page-about .about-track__card {
  padding: 18px 20px 20px;
}

.page-about .about-track__stage {
  margin: 0;
  font-size: var(--fs-index);
  letter-spacing: var(--track);
  color: var(--c-sand);
}

.page-about .about-track__title {
  margin: 8px 0 0;
  font-family: var(--font-title);
  font-size: 19px;
  line-height: 1.45;
  color: var(--c-white);
}

.page-about .about-track__text {
  margin: 10px 0 0;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--c-gray);
}

/* ---------- 团队 ---------- */
.page-about .about-team__chart {
  margin-top: 30px;
  padding: 24px 20px 26px;
  border: 1px solid var(--about-hair);
  background: linear-gradient(160deg, rgba(24, 42, 77, 0.92), rgba(14, 27, 51, 0.55));
}

.page-about .about-team__dots {
  display: grid;
  grid-template-columns: repeat(13, minmax(0, 1fr));
  gap: 6px;
}

.page-about .about-team__dot {
  display: block;
  aspect-ratio: 1 / 1;
  background: var(--c-ink-3);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-team__dot--core {
  background: linear-gradient(180deg, var(--c-orange), #E05F24);
}

.page-about .about-team__dot:hover {
  transform: scale(1.35);
}

.page-about .about-team__legend {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: var(--fs-small);
  color: var(--c-gray);
}

.page-about .about-team__legend li {
  display: flex;
  align-items: center;
  gap: 9px;
}

.page-about .about-team__legend b {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--c-white);
}

.page-about .about-team__swatch {
  flex: none;
  width: 12px;
  height: 12px;
}

.page-about .about-team__swatch--core {
  background: var(--c-orange);
}

.page-about .about-team__swatch--ops {
  background: var(--c-ink-3);
  border: 1px solid var(--about-hair);
}

.page-about .about-team__figure {
  margin: 30px 0 0;
  max-width: 640px;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  filter: saturate(0.8) contrast(1.05);
}

.page-about .about-flow {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-flow__step {
  padding: 20px 18px 22px;
  border-top: 2px solid var(--c-sand);
  background: rgba(24, 42, 77, 0.55);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .about-flow__num {
  font-size: var(--fs-index);
  letter-spacing: var(--track);
  color: var(--c-orange);
}

.page-about .about-flow__name {
  margin: 10px 0 0;
  font-family: var(--font-title);
  font-size: 18px;
  color: var(--c-white);
}

.page-about .about-flow__step p {
  margin: 8px 0 0;
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--c-gray);
}

@media (min-width: 640px) {
  .page-about .about-team__dots {
    grid-template-columns: repeat(26, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 覆盖与节奏 ---------- */
.page-about .about-scope__list {
  margin: 30px 0 0;
}

.page-about .about-scope__row {
  display: grid;
  gap: 8px;
  padding: 18px 0;
  border-top: 1px solid var(--about-hair);
}

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

.page-about .about-scope__row dt {
  display: flex;
  align-items: center;
  font-family: var(--font-title);
  font-size: 18px;
  color: var(--c-white);
}

.page-about .about-scope__row dt::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  margin-right: 10px;
  background: var(--c-sand);
}

.page-about .about-scope__row dd {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.8;
  color: var(--c-gray);
}

@media (min-width: 760px) {
  .page-about .about-scope__row {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
    gap: 28px;
    padding: 22px 0;
  }
}

/* ---------- 长期使用（浅色分区） ---------- */
.page-about .about-why {
  background: var(--c-mist);
  color: var(--c-black);
  padding: clamp(50px, 7vw, 92px) 0;
}

.page-about .about-why .eyebrow {
  color: #96631A;
}

.page-about .about-why .section-title {
  color: var(--c-black);
}

.page-about .about-why .section-lead {
  color: var(--about-ink-soft);
}

.page-about .about-why__grid {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.page-about .about-why__card {
  padding: 24px 20px 26px;
  background: var(--c-white);
  border-top: 3px solid var(--c-orange);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .about-why__card:nth-child(2) {
  border-top-color: var(--c-sand);
}

.page-about .about-why__card:nth-child(3) {
  border-top-color: var(--c-jade);
}

.page-about .about-why__name {
  margin: 0;
  font-family: var(--font-title);
  font-size: 19px;
  line-height: 1.45;
  color: var(--c-black);
}

.page-about .about-why__card p {
  margin: 12px 0 0;
  font-size: var(--fs-small);
  line-height: 1.8;
  color: var(--about-ink-soft);
}

@media (min-width: 760px) {
  .page-about .about-why__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

/* ---------- 下一步 ---------- */
.page-about .about-next__panel {
  display: grid;
  gap: 26px;
  padding: 30px 22px 32px;
}

.page-about .about-next__title {
  margin: 12px 0 0;
  font-family: var(--font-title);
  font-size: clamp(24px, 2.6vw, 32px);
  line-height: 1.3;
  color: var(--c-white);
}

.page-about .about-next__copy p {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: var(--fs-small);
  line-height: 1.8;
  color: var(--c-gray);
}

.page-about .about-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .about-next__links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--about-hair);
  color: var(--c-white);
  font-size: var(--fs-small);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-next__links a::after {
  content: "→";
  font-family: var(--font-mono);
  color: var(--c-sand);
  transition: transform var(--dur) var(--ease);
}

.page-about .about-next__links a:hover,
.page-about .about-next__links a:focus-visible {
  border-color: var(--c-orange);
  background: var(--c-orange-soft);
}

.page-about .about-next__links a:hover::after,
.page-about .about-next__links a:focus-visible::after {
  transform: translateX(4px);
}

@media (min-width: 900px) {
  .page-about .about-next__panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
    align-items: center;
    padding: 44px 42px 46px;
  }
}

/* ---------- 减动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-track__nav a,
  .page-about .about-team__dot,
  .page-about .about-next__links a,
  .page-about .about-next__links a::after {
    transition: none;
  }

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

  .page-about .about-next__links a:hover::after,
  .page-about .about-next__links a:focus-visible::after {
    transform: none;
  }
}