.page-about {
  --about-cyan-soft: rgba(40, 224, 208, .16);
  --about-warm-soft: rgba(255, 138, 61, .15);
  --about-hairline: rgba(169, 198, 216, .11);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding-top: clamp(18px, 3.5vw, 40px);
}

.page-about .about-hero__frame {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 6vw, 72px) clamp(20px, 4.5vw, 68px) clamp(34px, 6vw, 76px);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-xl);
  background:
    radial-gradient(120% 100% at 10% 0%, var(--about-cyan-soft), transparent 58%),
    radial-gradient(110% 90% at 100% 100%, var(--about-warm-soft), transparent 62%),
    linear-gradient(158deg, rgba(16, 31, 68, .94), rgba(11, 27, 58, .98));
  box-shadow: var(--shadow-card);
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 13px;
  border: 1px dashed rgba(169, 198, 216, .14);
  border-radius: calc(var(--r-xl) - 12px);
  pointer-events: none;
}

.page-about .about-hero__corner {
  position: absolute;
  top: clamp(22px, 3.4vw, 34px);
  right: clamp(22px, 3.4vw, 40px);
  font-size: .68rem;
  letter-spacing: .16em;
  color: rgba(169, 198, 216, .58);
}

.page-about .about-hero__title {
  max-width: 20ch;
  margin: clamp(14px, 2vw, 22px) 0 0;
  font-size: clamp(2rem, 5.6vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--text-strong);
}

.page-about .about-hero__lede {
  max-width: 62ch;
  margin-top: clamp(16px, 2.4vw, 26px);
  color: var(--text);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.2vw, 34px);
}

.page-about .about-hero__ruler {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 22px;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(40, 224, 208, .42) 0 1px,
    transparent 1px 46px
  );
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  opacity: .7;
  pointer-events: none;
}

/* ---------- 品牌历程 ---------- */
.page-about .about-journey__note {
  margin: 0;
  font-size: .92rem;
  color: var(--text-dim);
}

.page-about .about-journey__visual {
  margin-top: clamp(22px, 3.4vw, 36px);
}

.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(24px, 3.6vw, 40px) 0 clamp(20px, 3vw, 30px);
}

.page-about .about-filter__btn {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--text-dim);
  background: rgba(30, 58, 110, .42);
  border: 1px solid var(--line);
  border-radius: var(--pill);
  padding: .5rem 1.05rem;
  cursor: pointer;
  transition: color .22s ease, border-color .22s ease, background .22s ease, transform .22s ease;
}

.page-about .about-filter__btn:hover {
  color: var(--text-strong);
  border-color: var(--line-strong);
}

.page-about .about-filter__btn[aria-pressed="true"] {
  color: #05121E;
  font-weight: 600;
  background: linear-gradient(118deg, var(--cyan), var(--blue));
  border-color: transparent;
  box-shadow: 0 12px 26px -16px rgba(40, 224, 208, .7);
}

.page-about .about-timeline {
  display: grid;
}

.page-about .tl-item {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  grid-template-areas:
    "axis stamp"
    "axis body";
  column-gap: 16px;
  row-gap: 4px;
  padding-bottom: clamp(22px, 4vw, 38px);
}

.page-about .tl-item__stamp {
  grid-area: stamp;
  margin: 0;
  font-size: .82rem;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .tl-item__axis {
  grid-area: axis;
  position: relative;
}

.page-about .tl-item__axis::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 14px;
  bottom: 0;
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, rgba(40, 224, 208, .5), rgba(169, 198, 216, .08));
}

.page-about .tl-item:last-child .tl-item__axis::before {
  background: linear-gradient(180deg, rgba(40, 224, 208, .5), transparent);
}

.page-about .tl-item__dot {
  position: absolute;
  left: 50%;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(40, 224, 208, .14);
}

.page-about .tl-item--current .tl-item__dot {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, .18);
}

.page-about .tl-item__body {
  grid-area: body;
  padding: 0 0 clamp(16px, 2.8vw, 26px);
  border-bottom: 1px solid var(--about-hairline);
}

.page-about .tl-item:last-child .tl-item__body {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .tl-item__title {
  margin: 0 0 .5rem;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.2vw, 1.42rem);
  letter-spacing: .01em;
  color: var(--text-strong);
}

.page-about .tl-item__text {
  margin: 0 0 .85rem;
  max-width: 66ch;
  font-size: .97rem;
  line-height: 1.75;
  color: var(--text);
}

.page-about .tl-item__body .tag {
  margin-right: 8px;
}

/* ---------- 使命与服务方向 ---------- */
.page-about .about-mission__head {
  max-width: 66ch;
}

.page-about .about-mission__lede {
  margin-top: clamp(14px, 2vw, 20px);
  color: var(--text);
}

.page-about .about-pillars {
  display: grid;
  gap: clamp(16px, 2.6vw, 24px);
  margin: clamp(30px, 5vw, 54px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-pillar {
  position: relative;
  padding: clamp(22px, 3.4vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(30, 58, 110, .5), rgba(16, 31, 68, .62));
  transition: transform .3s ease, border-color .3s ease;
}

.page-about .about-pillar:hover {
  transform: translateY(-4px);
  border-color: rgba(40, 224, 208, .42);
}

.page-about .about-pillar__idx {
  display: inline-block;
  font-size: .78rem;
  letter-spacing: .18em;
  color: var(--amber);
  margin-bottom: .7rem;
}

.page-about .about-pillar__title {
  margin: 0 0 .6rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  color: var(--text-strong);
}

.page-about .about-pillar__text {
  margin: 0;
  font-size: .96rem;
  line-height: 1.75;
  color: var(--text);
}

/* ---------- 团队与协作生态 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-team__text {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 62ch;
  font-size: .98rem;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(12px, 2vw, 18px);
  margin: clamp(24px, 3.6vw, 34px) 0 0;
}

.page-about .about-stats__item {
  padding: clamp(14px, 2.2vw, 18px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(30, 58, 110, .32);
}

.page-about .about-stats__key {
  display: block;
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-about .about-stats__val {
  margin: .35rem 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.22rem);
  color: var(--cyan);
}

/* ---------- 荣誉与资质 ---------- */
.page-about .about-honors__note {
  margin: 0;
  font-size: .92rem;
  color: var(--text-dim);
}

.page-about .about-honors__grid {
  display: grid;
  gap: clamp(20px, 3.2vw, 32px);
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-about .about-honors__cards {
  display: grid;
  gap: clamp(14px, 2.2vw, 20px);
}

.page-about .honor-card {
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, rgba(30, 58, 110, .46), rgba(16, 31, 68, .6));
  outline: none;
  transition: border-color .3s ease, transform .3s ease, background .3s ease;
}

.page-about .honor-card:hover,
.page-about .honor-card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(255, 138, 61, .5);
}

.page-about .honor-card__mark {
  display: inline-block;
  font-size: .76rem;
  letter-spacing: .12em;
  color: var(--amber);
  border: 1px solid rgba(255, 209, 102, .34);
  border-radius: var(--pill);
  padding: .24rem .7rem;
}

.page-about .honor-card__title {
  margin: .8rem 0 .5rem;
  font-family: var(--font-display);
  font-size: clamp(1.08rem, 2vw, 1.32rem);
  color: var(--text-strong);
}

.page-about .honor-card__brief {
  margin: 0;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--text);
}

.page-about .honor-card__more {
  max-height: 0;
  overflow: hidden;
  margin: 0;
  opacity: 0;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--text-dim);
  transition: max-height .4s ease, opacity .3s ease, margin-top .3s ease;
}

.page-about .honor-card:hover .honor-card__more,
.page-about .honor-card:focus-visible .honor-card__more,
.page-about .honor-card:focus-within .honor-card__more {
  max-height: 240px;
  margin-top: .75rem;
  opacity: 1;
}

@media (hover: none) {
  .page-about .honor-card__more {
    max-height: none;
    margin-top: .75rem;
    opacity: 1;
  }
}

/* ---------- 后续路径 ---------- */
.page-about .about-next__inner {
  display: grid;
  gap: clamp(22px, 3.4vw, 36px);
  padding: clamp(26px, 4.4vw, 48px);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-xl);
  background:
    radial-gradient(90% 120% at 0% 0%, var(--about-cyan-soft), transparent 60%),
    linear-gradient(140deg, rgba(16, 31, 68, .9), rgba(11, 27, 58, .95));
}

.page-about .about-next__links {
  display: grid;
  gap: 10px;
}

.page-about .about-next__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: clamp(14px, 2.2vw, 18px) clamp(16px, 2.4vw, 22px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  color: var(--text-strong);
  text-decoration: none;
  background: rgba(30, 58, 110, .3);
  transition: border-color .25s ease, background .25s ease, transform .25s ease;
}

.page-about .about-next__link:hover {
  transform: translateX(4px);
  border-color: rgba(40, 224, 208, .48);
  background: rgba(30, 58, 110, .52);
}

.page-about .about-next__link-text {
  font-size: .98rem;
}

.page-about .about-next__link-mark {
  color: var(--cyan);
  font-size: 1rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-pillars {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 860px) {
  .page-about .tl-item {
    grid-template-columns: 160px 24px minmax(0, 1fr);
    grid-template-areas: "stamp axis body";
    column-gap: 26px;
    row-gap: 0;
    align-items: start;
  }

  .page-about .tl-item__stamp {
    text-align: right;
    padding-top: 2px;
    font-size: .86rem;
  }

  .page-about .tl-item__axis {
    justify-self: stretch;
    align-self: stretch;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
  }

  .page-about .about-team__media {
    margin-top: -28px;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
  }
}

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

  .page-about .about-hero__title {
    max-width: 18ch;
  }
}

/* ---------- 筛选与动效 ---------- */
.page-about [data-filtered-out] {
  display: none !important;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-pillar,
  .page-about .honor-card,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .about-pillar:hover,
  .page-about .honor-card:hover,
  .page-about .about-next__link:hover {
    transform: none;
  }
}