.page-about {
  background:
    radial-gradient(circle at 84% 4%, rgba(57, 242, 207, 0.1), transparent 44%),
    radial-gradient(circle at 10% 0%, rgba(255, 107, 74, 0.13), transparent 40%),
    var(--deep);
  color: var(--paper);
  padding-bottom: clamp(28px, 5vw, 56px);
}

.page-about .breadcrumbs {
  padding: clamp(14px, 2.4vw, 22px) 0 0;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--coral);
}

.page-about .about-kicker::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--coral);
}

.page-about .about-kicker--ink {
  color: var(--coral-ink);
}

.page-about .about-kicker--ink::before {
  background: var(--coral-ink);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4.4vw, 40px) 0 clamp(40px, 6.4vw, 76px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--coral) 0%, var(--mint) 42%, transparent 92%);
  opacity: 0.55;
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

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

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(33px, 7.2vw, 72px);
  line-height: 1;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: rgba(241, 246, 245, 0.82);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin: clamp(24px, 3.6vw, 34px) 0 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-figures__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-figures__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.1;
  color: var(--mint);
  letter-spacing: -0.01em;
}

.page-about .about-figures__key {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--haze);
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--navy);
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
  overflow: hidden;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 210px;
  max-height: 400px;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06) brightness(0.85);
}

.page-about .about-hero__badge {
  position: absolute;
  right: 14px;
  bottom: 18px;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--deep);
  background: var(--mint);
}

/* ---------- 主体骨架 ---------- */

.page-about .about-body {
  display: grid;
  gap: clamp(22px, 3.6vw, 44px);
  padding-top: clamp(26px, 4.4vw, 48px);
}

.page-about .about-rail {
  min-width: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
}

.page-about .about-rail__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--haze);
}

.page-about .about-rail__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__item {
  flex: 0 0 auto;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 10px;
  border: 1px solid var(--line-soft);
  color: var(--haze);
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--paper);
  border-color: var(--mint);
  background: rgba(57, 242, 207, 0.08);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--coral);
}

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

.page-about .about-sec {
  padding: clamp(26px, 4.4vw, 46px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-sec--last {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-sec__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4.2vw, 38px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.page-about .about-sec__title--ink {
  color: var(--ink);
}

.page-about .about-sec__lead {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(241, 246, 245, 0.8);
}

.page-about .about-sec__lead--tight {
  max-width: 64ch;
}

.page-about .about-p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(7, 16, 25, 0.78);
}

/* ---------- 品牌坐标纸面板 ---------- */

.page-about .about-paper {
  position: relative;
  padding: clamp(22px, 4vw, 40px);
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 26px 46px -34px rgba(0, 0, 0, 0.85);
}

.page-about .about-paper::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(7, 16, 25, 0.14);
  pointer-events: none;
}

.page-about .about-split {
  display: grid;
  gap: clamp(20px, 3.2vw, 34px);
}

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

.page-about .about-capabilities {
  display: grid;
  gap: 12px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cap {
  padding: 14px 16px;
  border: 1px solid rgba(7, 16, 25, 0.14);
  border-left: 3px solid var(--coral-ink);
  background: rgba(255, 255, 255, 0.6);
}

.page-about .about-cap__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--coral-ink);
}

.page-about .about-cap h3 {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-cap p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(7, 16, 25, 0.74);
}

.page-about .about-split__aside {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  border: 1px dashed rgba(7, 16, 25, 0.22);
  color: var(--console);
}

.page-about .about-map {
  display: block;
  width: 100%;
  height: auto;
  color: var(--console);
}

.page-about .about-map__caption {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: rgba(7, 16, 25, 0.66);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  margin: clamp(22px, 3.6vw, 32px) 0 0;
  padding: 0 0 0 22px;
  list-style: none;
  border-left: 2px solid var(--line);
}

.page-about .about-tl__item {
  position: relative;
  padding-bottom: clamp(24px, 3.4vw, 34px);
}

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

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 12px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--mint);
  border-radius: 50%;
  background: var(--deep);
}

.page-about .about-tl__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 50px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--coral);
}

.page-about .about-tl__name {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.2vw, 21px);
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-tl__desc {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(241, 246, 245, 0.76);
}

.page-about .about-band {
  position: relative;
  margin: clamp(24px, 4vw, 36px) 0 0;
  overflow: hidden;
  clip-path: polygon(0 8%, 100% 0, 100% 92%, 0 100%);
  border: 1px solid var(--line);
}

.page-about .about-band img {
  display: block;
  width: 100%;
  height: clamp(120px, 24vw, 220px);
  object-fit: cover;
  filter: brightness(0.62) saturate(1.1);
}

.page-about .about-band__caption {
  position: absolute;
  left: 16px;
  bottom: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mint);
  background: rgba(6, 20, 38, 0.72);
  padding: 5px 10px;
}

/* ---------- 团队 ---------- */

.page-about .about-split--crew {
  margin-top: clamp(20px, 3.2vw, 30px);
}

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

.page-about .about-role {
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(18, 57, 92, 0.62), rgba(10, 32, 56, 0.34));
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  border-color: var(--mint);
  transform: translateY(-2px);
}

.page-about .about-role summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-role summary::-webkit-details-marker {
  display: none;
}

.page-about .about-role summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--mint);
}

.page-about .about-role[open] summary::after {
  content: "–";
}

.page-about .about-role__body {
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(241, 246, 245, 0.78);
}

.page-about .about-crew__figure {
  margin: 0;
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--navy);
}

.page-about .about-crew__figure img {
  display: block;
  width: 100%;
  height: clamp(200px, 34vw, 320px);
  object-fit: cover;
  filter: saturate(0.9) brightness(0.82);
}

.page-about .about-crew__figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--haze);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 合作 ---------- */

.page-about .about-partners {
  padding: clamp(22px, 4vw, 42px);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, var(--console) 0%, var(--navy) 62%, rgba(10, 32, 56, 0.9) 100%);
  position: relative;
  overflow: hidden;
}

.page-about .about-partners::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 220px;
  height: 220px;
  border: 1px solid rgba(57, 242, 207, 0.24);
  transform: rotate(18deg);
  pointer-events: none;
}

.page-about .about-partner-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .about-partner {
  padding: 16px;
  border: 1px solid var(--line-soft);
  background: rgba(6, 20, 38, 0.42);
}

.page-about .about-partner__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.6vw, 38px);
  line-height: 1;
  color: var(--mint);
}

.page-about .about-partner__key {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--coral-soft);
}

.page-about .about-partner p {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.74;
  color: rgba(241, 246, 245, 0.76);
}

/* ---------- 服务标准 ---------- */

.page-about .about-standards {
  display: grid;
  gap: 1px;
  margin-top: clamp(20px, 3.2vw, 28px);
  border: 1px solid var(--line);
  background: var(--line-soft);
}

.page-about .about-standards__row {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  background: var(--navy);
}

.page-about .about-standards__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mint);
}

.page-about .about-standards__val {
  font-size: 14px;
  line-height: 1.74;
  color: rgba(241, 246, 245, 0.84);
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.page-about .about-tag {
  padding: 5px 12px;
  font-size: 11px;
  letter-spacing: 0.14em;
  border: 1px solid currentColor;
}

.page-about .about-tag--pending {
  color: var(--coral-soft);
}

.page-about .about-tag--done {
  color: var(--mint);
}

.page-about .about-tag--live {
  color: var(--paper);
}

.page-about .about-note {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 13px;
  line-height: 1.72;
  color: var(--haze);
}

/* ---------- 转化区 ---------- */

.page-about .about-cta {
  display: grid;
  gap: clamp(22px, 3.4vw, 34px);
  padding: clamp(22px, 4vw, 42px);
  border: 1px solid var(--line);
  background:
    linear-gradient(118deg, rgba(255, 107, 74, 0.16), rgba(57, 242, 207, 0.08) 62%, transparent 100%),
    var(--navy);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}

.page-about .about-cta__link {
  font-size: 13px;
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-contact {
  padding: 18px;
  border: 1px solid var(--line-soft);
  background: rgba(6, 20, 38, 0.5);
}

.page-about .about-contact__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mint);
}

.page-about .about-contact__list {
  display: grid;
  gap: 12px;
  margin: 0;
}

.page-about .about-contact__row {
  display: grid;
  gap: 3px;
}

.page-about .about-contact__row dt {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--haze);
}

.page-about .about-contact__row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.68;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-about .about-contact__row dd a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-contact__tip {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  line-height: 1.7;
  color: var(--haze);
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 760px) {
  .page-about .about-standards__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: stretch;
  }

  .page-about .about-hero__media {
    align-self: stretch;
  }

  .page-about .about-hero__media img {
    height: 100%;
    max-height: 460px;
  }

  .page-about .about-body {
    grid-template-columns: 196px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 22px;
    padding: 16px 14px;
    border: 1px solid var(--line);
    background: rgba(10, 32, 56, 0.62);
  }

  .page-about .about-rail__list {
    display: grid;
    gap: 4px;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-rail__link {
    padding: 8px 6px;
    border: 0;
    border-left: 2px solid transparent;
    background: none;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    background: rgba(57, 242, 207, 0.06);
    border-left-color: var(--mint);
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.68fr);
    align-items: start;
  }

  .page-about .about-split--crew {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    align-items: start;
  }
}

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

  .page-about .about-role:hover,
  .page-about .about-role:focus-within {
    transform: none;
  }
}