.page-about {
  --about-gap: clamp(52px, 8vw, 120px);
  --about-radius: 28px;
  --about-line: rgba(217, 179, 108, 0.22);
  --about-soft: rgba(244, 247, 251, 0.78);
  background: var(--ink);
  color: var(--mist);
  overflow-x: clip;
  padding-bottom: clamp(40px, 6vw, 88px);
}

.page-about .container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  box-sizing: border-box;
}

.page-about .breadcrumb {
  padding-top: clamp(18px, 2.6vw, 32px);
  padding-bottom: clamp(8px, 1.6vw, 18px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-top: clamp(8px, 2vw, 24px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -8%;
  right: -12%;
  width: min(620px, 78vw);
  height: min(620px, 78vw);
  background: radial-gradient(circle at 55% 45%, rgba(255, 90, 31, 0.24), rgba(124, 92, 255, 0.1) 45%, transparent 68%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: end;
}

.page-about .about-hero__rail {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sand);
}

.page-about .about-rail__coord {
  white-space: nowrap;
}

.page-about .about-rail__line {
  flex: 1;
  height: 1px;
  min-width: 24px;
  background: linear-gradient(to right, var(--sand), transparent);
}

.page-about .about-rail__year {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--lava);
}

.page-about .about-rail__year span {
  font-size: 0.4em;
  letter-spacing: 0;
  margin-left: 2px;
  color: var(--sand);
}

.page-about .about-rail__note {
  color: var(--stone);
  white-space: nowrap;
}

.page-about .about-hero__main h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 6.2vw, 84px);
  line-height: 1.04;
  letter-spacing: -0.04em;
  margin: 14px 0 0;
  color: var(--mist);
}

.page-about .about-hero__lede {
  max-width: 62ch;
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--about-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-hero__stats {
  position: relative;
  z-index: 1;
  margin-top: clamp(34px, 5vw, 64px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: 20px;
  overflow: hidden;
}

.page-about .about-stat {
  background: var(--ink-2);
  padding: clamp(16px, 2.2vw, 26px);
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.8vw, 32px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--celadon);
}

.page-about .about-stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 通用章节 ---------- */

.page-about .about-block {
  padding-block: var(--about-gap);
}

.page-about .about-head {
  max-width: 780px;
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-about .section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.6vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin: 12px 0 0;
  color: var(--mist);
}

.page-about .about-body {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-soft);
}

.page-about .coords {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sand);
  margin: 0;
  text-transform: uppercase;
}

.page-about .media-frame {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink-2), var(--ink-deep));
  border: 1px solid var(--about-line);
}

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

.page-about .media-frame__caption {
  display: block;
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--stone);
  border-top: 1px solid var(--about-line);
}

/* ---------- 起点 ---------- */

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 56px);
  align-items: center;
}

.page-about .about-points {
  list-style: none;
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-points li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.74em;
  width: 12px;
  height: 2px;
  border-radius: 2px;
  background: var(--lava);
}

/* ---------- 原则 ---------- */

.page-about .about-principle-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-principle {
  background: linear-gradient(158deg, var(--ink-2), rgba(18, 42, 77, 0.55));
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  padding: clamp(22px, 2.6vw, 32px);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-principle:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 90, 31, 0.7);
}

.page-about .about-principle__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--sand);
  margin: 0 0 16px;
}

.page-about .about-principle h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 2vw, 23px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
  color: var(--mist);
}

.page-about .about-principle p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-soft);
}

.page-about .about-principle .about-principle__scene {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--about-line);
  font-size: 14px;
  color: var(--sand);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
}

.page-about .about-era {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-era__year {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 5vw, 62px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--lava);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-era__tag {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 12px;
  letter-spacing: 0.1em;
  line-height: 1.5;
  color: var(--sand);
}

.page-about .about-era__panel {
  background: var(--ink-2);
  border-left: 3px solid var(--lava);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  padding: clamp(18px, 2.4vw, 30px);
  max-width: 100%;
  box-sizing: border-box;
}

.page-about .about-era__panel h3 {
  font-family: var(--font-display);
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.4;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--celadon);
}

.page-about .about-era__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-soft);
}

.page-about .about-history__figure {
  margin-top: clamp(28px, 4vw, 52px);
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-about .about-team__total {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  padding: clamp(18px, 2.2vw, 26px);
  border-radius: var(--radius-card);
  background: linear-gradient(120deg, rgba(255, 90, 31, 0.16), rgba(18, 42, 77, 0.6));
  border: 1px solid rgba(255, 138, 76, 0.4);
}

.page-about .about-team__total-num {
  font-family: var(--font-mono);
  font-size: clamp(34px, 4.4vw, 52px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lava-soft);
}

.page-about .about-team__total-label {
  flex: 1 1 200px;
  min-width: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-team__nums {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-num {
  background: var(--ink-2);
  border: 1px solid var(--about-line);
  border-radius: 16px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-num__value {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1;
  color: var(--celadon);
}

.page-about .about-num__label {
  font-size: 14px;
  font-weight: 600;
  color: var(--mist);
}

.page-about .about-num__desc {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--stone);
}

.page-about .about-team__note {
  margin-top: clamp(22px, 3vw, 36px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: 18px;
  overflow: hidden;
}

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

.page-about .about-note__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--sand);
  text-transform: uppercase;
}

.page-about .about-note__val {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 适配方法 ---------- */

.page-about .about-method__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-method__card {
  background: var(--ink-2);
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  padding: clamp(20px, 2.6vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

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

.page-about .about-chips li {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  background: rgba(63, 208, 176, 0.12);
  border: 1px solid rgba(63, 208, 176, 0.4);
  color: var(--celadon);
}

.page-about .about-chips--sand li {
  background: rgba(217, 179, 108, 0.12);
  border-color: rgba(217, 179, 108, 0.44);
  color: var(--sand);
}

.page-about .about-method__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-soft);
}

.page-about .about-method__card .btn {
  align-self: flex-start;
  margin-top: auto;
}

/* ---------- 生态与认可 ---------- */

.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

.page-about .about-eco__text .btn {
  margin-top: clamp(20px, 2.6vw, 28px);
}

.page-about .about-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.page-about .about-eco__item {
  background: var(--ink-2);
  padding: clamp(18px, 2.2vw, 26px);
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.page-about .about-eco__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--sand);
  min-width: 3.6em;
}

.page-about .about-eco__text {
  flex: 1;
  min-width: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-soft);
}

/* ---------- 收尾 ---------- */

.page-about .about-cta {
  padding-top: clamp(8px, 2vw, 24px);
}

.page-about .about-cta__panel {
  background: linear-gradient(125deg, var(--ink-2) 0%, var(--ink-deep) 58%, rgba(255, 90, 31, 0.22) 100%);
  border: 1px solid rgba(255, 138, 76, 0.42);
  border-radius: var(--about-radius);
  padding: clamp(26px, 4vw, 52px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 32px);
  align-items: center;
}

.page-about .about-cta__text h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 0;
  color: var(--mist);
}

.page-about .about-cta__text p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-soft);
  max-width: 56ch;
}

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

/* ---------- 断点 ---------- */

@media (min-width: 700px) {
  .page-about .about-team__note {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-method__card:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-hero__rail {
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 18px;
    height: 100%;
    padding-bottom: 6px;
  }

  .page-about .about-rail__coord,
  .page-about .about-rail__note {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.3em;
  }

  .page-about .about-rail__line {
    flex: 1 1 60px;
    width: 1px;
    min-width: 1px;
    min-height: 60px;
    height: auto;
    background: linear-gradient(to bottom, var(--sand), transparent);
  }

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

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  }

  .page-about .about-principle-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-principle:nth-child(2) {
    margin-top: 34px;
  }

  .page-about .about-principle:nth-child(3) {
    margin-top: 68px;
  }

  .page-about .about-era {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
    align-items: start;
  }

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

  .page-about .about-era__panel {
    max-width: 660px;
  }

  .page-about .about-era:nth-child(even) .about-era__panel {
    margin-left: clamp(24px, 6vw, 88px);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }

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

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

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

  .page-about .about-method__card:last-child {
    grid-column: auto;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
  }

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

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-principle {
    transition: none;
  }

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