/* ===== 我们是谁 / page-about ===== */

.page-about {
  position: relative;
  overflow-x: clip;
}

/* ---- 首屏 ---- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-top: calc(var(--header-h) + clamp(40px, 8vw, 96px));
  padding-bottom: clamp(36px, 6vw, 72px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -12% -18% 0 -18%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58% 68% at 78% 10%, rgba(59, 42, 107, 0.72) 0%, rgba(59, 42, 107, 0) 72%),
    radial-gradient(48% 58% at 6% 92%, rgba(53, 224, 208, 0.09) 0%, rgba(53, 224, 208, 0) 70%);
}

.page-about .about-hero .eyebrow {
  margin: 24px 0 0;
  color: var(--c-cyan);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  max-width: 15ch;
  font-size: clamp(36px, 8.6vw, 104px);
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lede {
  margin-top: clamp(20px, 3vw, 32px);
  max-width: 62ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-about .about-hero__scale {
  margin-top: clamp(34px, 5vw, 60px);
  height: 20px;
  border-top: 1px solid var(--c-line);
  background-image: repeating-linear-gradient(
    to right,
    var(--c-line) 0 1px,
    transparent 1px 26px
  );
  background-size: 26px 8px;
  background-repeat: repeat-x;
  opacity: 0.85;
}

/* ---- 01 品牌自述 ---- */
.page-about .about-lede {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
  margin-top: clamp(26px, 3.6vw, 44px);
}

.page-about .about-lede__text {
  min-width: 0;
}

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

.page-about .about-lede .media-frame__img,
.page-about .crew .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-lede .media-frame__caption,
.page-about .crew .media-frame__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-observ);
}

/* ---- 02 数据能力矩阵 ---- */
.page-about .matrix {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin-top: clamp(26px, 3.6vw, 44px);
  border-top: 1px solid var(--c-line);
  border-left: 1px solid var(--c-line);
  background: rgba(16, 26, 61, 0.35);
}

.page-about .matrix__cell {
  position: relative;
  min-width: 0;
  padding: clamp(22px, 2.8vw, 32px) clamp(16px, 2vw, 24px) clamp(26px, 3.2vw, 36px);
  border-right: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  transition: background-color 0.25s ease;
}

.page-about .matrix__cell::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-orange));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.28s ease-out;
}

.page-about .matrix__cell:hover,
.page-about .matrix__cell:focus-within {
  background-color: rgba(53, 224, 208, 0.05);
}

.page-about .matrix__cell:hover::before,
.page-about .matrix__cell:focus-within::before {
  transform: scaleX(1);
}

.page-about .matrix__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--c-observ);
}

.page-about .matrix__icon {
  display: block;
  width: 30px;
  height: 30px;
  margin-top: 18px;
  color: var(--c-cyan);
  transition: transform 0.25s ease-out;
}

.page-about .matrix__cell:hover .matrix__icon,
.page-about .matrix__cell:focus-within .matrix__icon {
  transform: scale(1.12);
}

.page-about .matrix__title {
  margin: 16px 0 0;
  font-size: clamp(18px, 2vw, 21px);
  font-weight: 700;
  color: var(--c-stardust);
}

.page-about .matrix__text {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-body);
}

.page-about .matrix__stat {
  display: block;
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: 25px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--c-orange);
  font-variant-numeric: tabular-nums;
}

.page-about .matrix__stat small {
  display: block;
  margin-top: 8px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--c-observ);
}

/* ---- 03 发展阶段 ---- */
.page-about .journey {
  position: relative;
  isolation: isolate;
}

.page-about .journey__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  opacity: 0.4;
  pointer-events: none;
}

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

.page-about .journey__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    var(--c-void) 0%,
    rgba(7, 11, 31, 0.58) 38%,
    rgba(7, 11, 31, 0.92) 100%
  );
}

.page-about .tl {
  margin-top: clamp(28px, 3.8vw, 48px);
}

.page-about .tl__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding: clamp(20px, 2.6vw, 30px) 0;
  border-top: 1px solid var(--c-line);
}

.page-about .tl__item:last-child {
  border-bottom: 1px solid var(--c-line);
}

.page-about .tl__phase {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .tl__dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 0 4px rgba(53, 224, 208, 0.14);
}

.page-about .tl__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--c-observ);
  text-transform: uppercase;
}

.page-about .tl__main {
  min-width: 0;
}

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

.page-about .tl__trigger {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  color: var(--c-stardust);
  font-family: inherit;
  font-size: clamp(21px, 3vw, 33px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  text-align: left;
  cursor: pointer;
}

.page-about .tl__trigger:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 5px;
}

.page-about .tl__mark {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 9px;
}

.page-about .tl__mark::before,
.page-about .tl__mark::after {
  content: "";
  position: absolute;
  background: var(--c-cyan);
  transition: transform 0.2s ease-out;
}

.page-about .tl__mark::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-about .tl__mark::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

.page-about .tl__item[data-open] .tl__mark::after {
  transform: scaleY(0);
}

.page-about .tl__panel {
  margin-top: 14px;
}

.page-about .tl__panel p {
  margin: 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-body);
}

.page-about .tl__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .tl__facts li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--c-line);
  background: rgba(16, 26, 61, 0.6);
  font-size: 13px;
  color: var(--c-body);
}

.page-about .tl__facts li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--c-orange);
}

/* ---- 04 团队与协作 ---- */
.page-about .crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
  margin-top: clamp(26px, 3.6vw, 44px);
}

.page-about .crew__figure {
  margin: 0;
  min-width: 0;
}

.page-about .crew__body {
  min-width: 0;
}

.page-about .crew__roles {
  display: grid;
  gap: 0;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--c-line);
}

.page-about .crew__role {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-about .crew__num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 600;
  line-height: 1;
  color: var(--c-orange);
  font-variant-numeric: tabular-nums;
}

.page-about .crew__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-stardust);
}

.page-about .crew__desc {
  grid-column: 2;
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-observ);
}

.page-about .crew__eco {
  margin: clamp(20px, 2.6vw, 28px) 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-body);
}

/* ---- 05 服务承诺 ---- */
.page-about .pledge {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin-top: clamp(26px, 3.6vw, 44px);
  border-top: 1px solid var(--c-line);
}

.page-about .pledge__item {
  min-width: 0;
  padding: clamp(20px, 2.6vw, 28px) 0 clamp(24px, 3vw, 32px);
  border-bottom: 1px solid var(--c-line);
}

.page-about .pledge__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--c-cyan);
}

.page-about .pledge__title {
  margin: 12px 0 0;
  font-size: clamp(17px, 1.9vw, 20px);
  font-weight: 700;
  color: var(--c-stardust);
}

.page-about .pledge__text {
  margin: 10px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-body);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 24px;
  margin-top: clamp(30px, 4vw, 48px);
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--c-line);
  background: linear-gradient(
    118deg,
    rgba(59, 42, 107, 0.62) 0%,
    rgba(16, 26, 61, 0.5) 52%,
    rgba(7, 11, 31, 0.25) 100%
  );
}

.page-about .about-cta__text {
  flex: 1 1 280px;
  min-width: 0;
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  color: var(--c-stardust);
}

.page-about .about-cta__note {
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-observ);
}

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

/* ---- 响应式 ---- */
@media (min-width: 660px) {
  .page-about .matrix {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .pledge__item:nth-child(odd) {
    padding-right: clamp(24px, 3vw, 40px);
    border-right: 1px solid var(--c-line);
  }

  .page-about .pledge__item:nth-child(even) {
    padding-left: clamp(24px, 3vw, 40px);
  }
}

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

  .page-about .tl__item {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: clamp(20px, 3vw, 44px);
  }

  .page-about .tl__phase {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }
}

@media (min-width: 960px) {
  .page-about .crew {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(30px, 4vw, 56px);
  }
}

@media (min-width: 1060px) {
  .page-about .matrix {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .matrix__cell,
  .page-about .matrix__icon,
  .page-about .matrix__cell::before,
  .page-about .tl__mark::before,
  .page-about .tl__mark::after {
    transition: none;
  }

  .page-about .matrix__cell::before {
    transform: scaleX(1);
    opacity: 0.4;
  }
}
</main>