/* ============================================================
   品牌自述 /about-us/
   作用域：.page-about
   ============================================================ */

.page-about {
  --about-text: rgba(245, 248, 252, .82);
  --about-panel: rgba(19, 39, 67, .62);
  --about-rule: rgba(157, 179, 198, .2);
}

/* ---------------- 面包屑 ---------------- */
.page-about .breadcrumbs {
  padding-top: clamp(1.25rem, 4vw, 2rem);
}

.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .breadcrumbs__item {
  font-size: .8125rem;
  letter-spacing: .02em;
  color: var(--slate);
}

.page-about .breadcrumbs__item a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .24s var(--ease), border-color .24s var(--ease);
}

.page-about .breadcrumbs__item a:hover,
.page-about .breadcrumbs__item a:focus-visible {
  color: var(--cyan);
  border-bottom-color: rgba(76, 224, 210, .55);
}

.page-about .breadcrumbs__item a[aria-current="page"] {
  color: var(--fog);
  border-bottom-color: transparent;
}

/* ---------------- 首屏 ---------------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1rem, 3vw, 2rem) 0 clamp(2.5rem, 7vw, 5rem);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -12%;
  width: 46vw;
  height: 46vw;
  max-width: 620px;
  max-height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(76, 224, 210, .16), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 1rem;
}

.page-about .about-hero__title {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(2.05rem, 7.6vw, 4.6rem);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--fog);
  margin: 0 0 1.25rem;
  max-width: 16ch;
}

.page-about .about-hero__lead {
  max-width: var(--measure);
  color: var(--about-text);
  font-size: clamp(1rem, 1.9vw, 1.125rem);
  line-height: 1.9;
  margin: 0 0 1.85rem;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-bottom: clamp(2rem, 5vw, 3.25rem);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0 auto;
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(140deg, rgba(76, 224, 210, .22), var(--panel) 48%, var(--ink));
  box-shadow: 0 32px 80px -46px rgba(0, 0, 0, .95);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 23, 48, 0) 42%, rgba(10, 23, 48, .78));
  pointer-events: none;
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .88;
}

/* ---------------- 章节通用 ---------------- */
.page-about .about-chapter {
  position: relative;
  padding: clamp(2.5rem, 7vw, 5.25rem) 0;
}

.page-about .about-chapter--band {
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
  background: linear-gradient(180deg, rgba(19, 39, 67, .6), rgba(10, 23, 48, 0) 74%);
}

.page-about .about-chapter__head {
  display: grid;
  gap: .55rem;
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-chapter__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.9rem, 5.4vw, 3.4rem);
  line-height: 1;
  letter-spacing: .06em;
  color: rgba(76, 224, 210, .3);
}

.page-about .about-chapter__title {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.6vw, 2.45rem);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--fog);
  margin: 0;
  max-width: 24ch;
}

.page-about .about-chapter__lead {
  max-width: 52ch;
  color: var(--slate);
  font-size: 1rem;
  line-height: 1.85;
  margin: 0;
}

.page-about .about-chapter__prose p {
  margin: 0 0 1.1rem;
  color: var(--about-text);
  font-size: 1.0625rem;
  line-height: 1.9;
}

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

/* ---------------- 01 暖沙引言块 ---------------- */
.page-about .about-note {
  align-self: start;
  border-radius: var(--r-lg);
  padding: clamp(1.4rem, 3.6vw, 2rem);
  background: linear-gradient(155deg, rgba(233, 216, 188, .96), rgba(233, 216, 188, .74));
  color: var(--deep);
  box-shadow: 0 26px 60px -48px rgba(0, 0, 0, .9);
}

.page-about .about-note__quote {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(1.3rem, 2.6vw, 1.8rem);
  line-height: 1.28;
  letter-spacing: -.01em;
  margin: 0 0 .85rem;
  color: var(--deep);
}

.page-about .about-note__text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.9;
  color: rgba(11, 21, 35, .8);
}

/* ---------------- 02 时间线 ---------------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: .7rem;
  bottom: 1.4rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(255, 123, 92, .85));
  opacity: .45;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 2.1rem 2.3rem;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .4rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(76, 224, 210, .12);
}

.page-about .about-timeline__item:last-child::before {
  border-color: var(--coral);
  box-shadow: 0 0 0 4px rgba(255, 123, 92, .16);
}

.page-about .about-timeline__date {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .875rem;
  letter-spacing: .08em;
  color: var(--cyan);
  margin-bottom: .4rem;
}

.page-about .about-timeline__item:last-child .about-timeline__date {
  color: var(--coral);
}

.page-about .about-timeline__title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.125rem;
  line-height: 1.4;
  color: var(--fog);
  margin: 0 0 .4rem;
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 48ch;
  font-size: .9375rem;
  line-height: 1.9;
  color: var(--slate);
}

/* ---------------- 03 团队 ---------------- */
.page-about .about-team {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-team__media {
  margin: 0;
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  background: linear-gradient(150deg, rgba(76, 224, 210, .24), rgba(255, 123, 92, .2) 70%, var(--panel));
}

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

.page-about .about-team__tabs {
  display: grid;
  gap: 1.15rem;
  align-content: start;
}

.page-about .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.page-about .tabs__tab {
  appearance: none;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: .9375rem;
  color: var(--slate);
  background: var(--about-panel);
  border: 1px solid var(--about-rule);
  border-radius: 999px;
  padding: .55rem 1.1rem;
  cursor: pointer;
  transition: color .24s var(--ease), background .24s var(--ease), border-color .24s var(--ease);
}

.page-about .tabs__tab:hover {
  color: var(--fog);
  border-color: rgba(157, 179, 198, .42);
}

.page-about .tabs__tab[aria-selected="true"] {
  color: var(--deep);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .tabs__tab:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
}

.page-about .tabs__panel {
  border: 1px solid var(--about-rule);
  border-radius: var(--r-lg);
  background: var(--glass);
  padding: clamp(1.25rem, 3.2vw, 1.9rem);
}

.page-about .tabs__panel[hidden] {
  display: none;
}

.page-about .about-team__role {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 1.0625rem;
  color: var(--cyan);
  margin: 0 0 .6rem;
}

.page-about .tabs__panel p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.9;
  color: var(--about-text);
}

/* ---------------- 04 覆盖与响应 ---------------- */
.page-about .about-coverage {
  display: grid;
  gap: clamp(1.25rem, 3.5vw, 2rem);
}

.page-about .about-coverage__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .85rem;
}

.page-about .about-stat {
  display: grid;
  gap: .25rem;
  align-content: start;
  border: 1px solid var(--about-rule);
  border-radius: var(--r-md);
  background: var(--about-panel);
  padding: .9rem 1rem;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.4rem, 3.2vw, 1.95rem);
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-stat__label {
  font-size: .8125rem;
  line-height: 1.65;
  color: var(--slate);
}

.page-about .about-coverage__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 12 / 7;
  background: linear-gradient(120deg, rgba(76, 224, 210, .2), rgba(19, 39, 67, .92));
}

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

.page-about .about-regions {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .75rem;
}

.page-about .about-region {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--about-rule);
  border-radius: var(--r-md);
  padding: 1.1rem 1.15rem 1.3rem;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .02em;
  color: var(--fog);
  background-color: var(--about-panel);
  background-image: radial-gradient(rgba(76, 224, 210, .34) 1.4px, transparent 1.5px);
  background-size: 13px 13px;
}

.page-about .about-region::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--coral));
}

.page-about .about-coverage__note {
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  max-width: var(--measure);
  font-size: .9375rem;
  line-height: 1.9;
  color: var(--slate);
}

/* ---------------- 05 合作网络 ---------------- */
.page-about .about-partners {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(15rem, 21rem);
  gap: 1rem;
  overflow-x: auto;
  padding: .25rem .25rem 1.25rem;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-partners:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 4px;
}

.page-about .about-partner {
  scroll-snap-align: start;
  display: grid;
  align-content: start;
  gap: .55rem;
  border: 1px solid var(--about-rule);
  border-radius: var(--r-lg);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  background: linear-gradient(160deg, rgba(19, 39, 67, .92), rgba(10, 23, 48, .68));
}

.page-about .about-partner__index {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .8125rem;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .about-partner__title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.125rem;
  line-height: 1.4;
  color: var(--fog);
  margin: 0;
}

.page-about .about-partner p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.9;
  color: var(--slate);
}

.page-about .about-partners__hint {
  margin: .25rem 0 0;
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--slate);
}

/* ---------------- 结尾行动块 ---------------- */
.page-about .about-cta {
  margin-top: clamp(2rem, 5vw, 3.25rem);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-lg);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  background: linear-gradient(120deg, rgba(76, 224, 210, .16), rgba(255, 123, 92, .14));
  display: grid;
  gap: .9rem;
}

.page-about .about-cta__title {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(1.25rem, 2.8vw, 1.75rem);
  line-height: 1.3;
  color: var(--fog);
  margin: 0;
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 52ch;
  font-size: .9375rem;
  line-height: 1.9;
  color: var(--about-text);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: .35rem;
}

/* ---------------- 响应式 ---------------- */
@media (min-width: 780px) {
  .page-about .about-chapter__head {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-team__media {
    aspect-ratio: 4 / 5;
  }
}

@media (min-width: 960px) {
  .page-about .about-coverage {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    grid-template-areas:
      "stats media"
      "regions media";
    align-items: start;
  }

  .page-about .about-coverage__stats {
    grid-area: stats;
  }

  .page-about .about-coverage__media {
    grid-area: media;
  }

  .page-about .about-regions {
    grid-area: regions;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 9rem minmax(0, 1fr);
    gap: 1.5rem;
    align-items: start;
  }

  .page-about .about-timeline__date {
    margin-bottom: 0;
    padding-top: .2rem;
  }
}

@media (min-width: 1080px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 3rem;
  }
}

@media (max-width: 560px) {
  .page-about .about-hero__title {
    max-width: 100%;
  }

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

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

  .page-about .about-partners {
    grid-auto-columns: minmax(13.5rem, 82vw);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
  }
}