.page-about {
  display: block;
  background:
    radial-gradient(1200px 600px at 85% -8%, rgba(230, 25, 43, 0.16), transparent 62%),
    radial-gradient(900px 520px at -5% 34%, rgba(127, 231, 255, 0.06), transparent 66%),
    var(--night);
  color: var(--text-soft);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-block {
  position: relative;
  padding: 60px 0;
}

.page-about .about-block--alt {
  background: var(--stand);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-block--method {
  background:
    linear-gradient(160deg, rgba(230, 25, 43, 0.10), transparent 46%),
    var(--night);
}

.page-about .about-head {
  display: grid;
  gap: 10px;
  margin-bottom: 30px;
  max-width: 760px;
}

.page-about .about-head__no {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--yellow);
}

.page-about .about-head__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 5.2vw, 36px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 0;
}

.page-about .about-head__lead {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 62ch;
}

/* ---------------- 首屏 ---------------- */

.page-about .about-hero {
  position: relative;
  padding: 34px 0 52px;
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -22%;
  bottom: -70%;
  width: 78vw;
  max-width: 860px;
  aspect-ratio: 1;
  background: radial-gradient(circle at 34% 34%, rgba(230, 25, 43, 0.34), transparent 64%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-about .about-hero__kicker {
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--green);
}

.page-about .about-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(34px, 8vw, 60px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 15ch;
}

.page-about .about-hero__lead {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-soft);
  max-width: 60ch;
}

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

.page-about .about-hero__board {
  padding: 22px 20px;
  border-radius: var(--r-l);
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.03)),
    rgba(11, 18, 32, 0.55);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  border-left: 3px solid var(--red);
}

.page-about .about-hero__board-label {
  margin: 0 0 14px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--yellow);
}

.page-about .about-hero__board-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-hero__board-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.10);
}

.page-about .about-hero__board-list li:last-child {
  border-bottom: 0;
}

.page-about .about-hero__board-key {
  font-size: 14px;
  color: var(--mist);
}

.page-about .about-hero__board-val {
  font-size: 26px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}

.page-about .about-hero__board-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

/* ---------------- 起点 ---------------- */

.page-about .about-origin {
  display: grid;
  gap: 26px;
}

.page-about .about-origin__text p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-soft);
}

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

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

.page-about .about-origin__point {
  padding: 16px 18px;
  border-radius: var(--r-m);
  background: var(--stand);
  border: 1px solid var(--line);
  border-left: 3px solid var(--red);
}

.page-about .about-origin__point p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-soft);
}

/* ---------------- 版图 ---------------- */

.page-about .about-coverage {
  display: grid;
  gap: 24px;
}

.page-about .about-coverage__media {
  margin: 0;
  border-radius: var(--r-l);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--night);
}

.page-about .about-coverage__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.page-about .about-coverage__caption {
  display: block;
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
  background: rgba(255, 255, 255, 0.04);
  border-top: 1px solid var(--line);
}

.page-about .about-coverage__meters {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .meter__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 9px;
}

.page-about .meter__label {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-soft);
}

.page-about .meter__value {
  font-size: 24px;
  font-weight: 700;
  color: var(--white);
  line-height: 1;
}

.page-about .meter__track {
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.09);
  overflow: hidden;
}

.page-about .meter__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}

.page-about .meter__fill--a {
  width: 100%;
  background: linear-gradient(90deg, var(--red-deep), var(--red));
}

.page-about .meter__fill--b {
  width: 42%;
  background: linear-gradient(90deg, var(--red), var(--yellow));
}

.page-about .meter__fill--c {
  width: 28%;
  background: linear-gradient(90deg, var(--yellow), var(--green));
}

.page-about .about-coverage__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

/* ---------------- 团队 ---------------- */

.page-about .about-team {
  display: grid;
  gap: 24px;
}

.page-about .about-team__media {
  margin: 0;
  border-radius: var(--r-l);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 14 / 9;
}

.page-about .about-team__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-team__role {
  position: relative;
  padding: 18px 18px 18px 20px;
  border-radius: var(--r-m);
  background: var(--stand);
  border: 1px solid var(--line);
}

.page-about .about-team__no {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--red);
  margin-bottom: 8px;
}

.page-about .about-team__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.005em;
  color: var(--white);
}

.page-about .about-team__role p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-about .about-team__foot {
  margin: 24px 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--yellow);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}

/* ---------------- 方法 ---------------- */

.page-about .about-method {
  display: grid;
  gap: 16px;
}

.page-about .about-method__card {
  position: relative;
  padding: 24px 20px 22px;
  border-radius: var(--r-l);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  transition: transform 0.28s ease-out, background 0.28s ease-out;
}

.page-about .about-method__card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.10);
}

.page-about .about-method__mark {
  display: block;
  width: 42px;
  height: 5px;
  border-radius: 999px;
  background: var(--red);
  margin-bottom: 16px;
}

.page-about .about-method__mark--b {
  background: var(--yellow);
}

.page-about .about-method__mark--c {
  background: var(--green);
}

.page-about .about-method__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.25;
  color: var(--white);
}

.page-about .about-method__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}

/* ---------------- 时间轴 ---------------- */

.page-about .about-trace__banner {
  border-radius: var(--r-l);
  overflow: hidden;
  border: 1px solid var(--line);
  margin-bottom: 28px;
}

.page-about .about-trace__banner img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 6;
  opacity: 0.72;
}

.page-about .trace {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .trace::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--red) 0%, var(--red) 30%, var(--yellow) 58%, var(--green) 100%);
}

.page-about .trace__item {
  position: relative;
  padding-left: 44px;
  margin-bottom: 14px;
}

.page-about .trace__item::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 20px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--night);
  border: 3px solid var(--red);
}

.page-about .trace__item--grow::before {
  border-color: var(--yellow);
}

.page-about .trace__item--loop::before {
  border-color: var(--green);
}

.page-about .trace__panel {
  border-radius: var(--r-m);
  background: var(--stand);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .trace__summary {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  transition: background 0.24s ease-out;
}

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

.page-about .trace__summary:hover {
  background: rgba(255, 255, 255, 0.05);
}

.page-about .trace__epoch {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .trace__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.35;
  color: var(--white);
}

.page-about .trace__body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--line);
  margin-top: 2px;
}

.page-about .trace__body p {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-soft);
}

.page-about .trace__panel[open] .trace__summary {
  background: rgba(230, 25, 43, 0.09);
}

.page-about .about-trace__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 26px;
}

/* ---------------- 合作 ---------------- */

.page-about .about-partner {
  display: grid;
  gap: 16px;
  margin-bottom: 26px;
}

.page-about .about-partner__item {
  padding: 22px 20px;
  border-radius: var(--r-l);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
}

.page-about .about-partner__tag {
  margin-bottom: 12px;
}

.page-about .about-partner__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.28;
  color: var(--white);
}

.page-about .about-partner__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-soft);
}

/* ---------------- 反馈 ---------------- */

.page-about .about-voice {
  display: grid;
  gap: 24px;
}

.page-about .about-voice__score {
  padding: 26px 22px;
  border-radius: var(--r-l);
  background: linear-gradient(150deg, rgba(230, 25, 43, 0.22), rgba(20, 30, 51, 0.9));
  border: 1px solid var(--line);
  text-align: left;
}

.page-about .about-voice__score-num {
  display: block;
  font-size: 62px;
  font-weight: 700;
  line-height: 1;
  color: var(--white);
}

.page-about .about-voice__score-label {
  display: block;
  margin-top: 12px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-soft);
}

.page-about .about-voice__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-voice__item {
  display: grid;
  grid-template-columns: 10px 1fr;
  gap: 14px;
  align-items: start;
}

.page-about .about-voice__dot {
  display: block;
  width: 10px;
  height: 10px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--yellow);
  box-shadow: 0 0 0 4px rgba(255, 198, 26, 0.14);
}

.page-about .about-voice__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-soft);
}

.page-about .about-voice__item strong {
  color: var(--white);
  font-weight: 600;
}

.page-about .about-block#voice .link-more {
  display: inline-block;
  margin-top: 26px;
}

/* ---------------- 下一程 ---------------- */

.page-about .about-next {
  position: relative;
  padding: 60px 0 76px;
  background:
    radial-gradient(760px 380px at 78% 10%, rgba(255, 198, 26, 0.14), transparent 66%),
    linear-gradient(180deg, var(--night), #070d18);
  border-top: 1px solid var(--line);
}

.page-about .about-next__no {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--green);
}

.page-about .about-next__title {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 5.4vw, 38px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--white);
  max-width: 20ch;
}

.page-about .about-next__lead {
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--text-soft);
  max-width: 68ch;
}

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

/* ---------------- 桌面栅格 ---------------- */

@media (min-width: 760px) {
  .page-about .about-block {
    padding: 78px 0;
  }

  .page-about .about-hero {
    padding: 46px 0 70px;
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-coverage {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 36px;
    align-items: center;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

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

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

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

  .page-about .about-voice {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .trace__summary {
    flex-direction: row;
    align-items: baseline;
    justify-content: flex-start;
    gap: 18px;
  }

  .page-about .trace__epoch {
    flex: 0 0 104px;
  }

  .page-about .about-next {
    padding: 82px 0 96px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
    gap: 46px;
    align-items: end;
  }

  .page-about .about-hero__board {
    padding: 26px 24px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.1fr);
    gap: 42px;
  }

  .page-about .about-team__media img {
    aspect-ratio: 14 / 11;
  }
}

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

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