.page-about {
  --about-rail-m: 46px;
  --about-rail-d: 148px;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: calc(var(--header-h) + 2.5rem) 3rem;
  background:
    radial-gradient(1000px 470px at 8% -14%, rgba(47, 247, 214, 0.15), transparent 62%),
    radial-gradient(720px 400px at 96% 4%, rgba(255, 138, 43, 0.12), transparent 64%),
    linear-gradient(158deg, var(--ink-850) 0%, var(--ink-900) 60%, var(--ink-900) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(30, 74, 60, 0.32) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 74, 60, 0.32) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 86%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 86%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -48%;
  width: 62%;
  height: 132%;
  background: linear-gradient(96deg, transparent 45%, rgba(47, 247, 214, 0.1) 45.6%, rgba(47, 247, 214, 0) 60%);
  transform: rotate(var(--slant));
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  width: var(--shell-wide);
  margin-inline: auto;
  display: grid;
  gap: 2.25rem;
}

.page-about .about-hero__title {
  margin: 0.6rem 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
  font-size: clamp(1.9rem, 6.2vw, 3.15rem);
  color: var(--text);
}

.page-about .about-hero__title-accent {
  display: block;
  margin-top: 0.35rem;
  color: var(--cyan);
}

.page-about .about-hero__lead {
  margin: 1.15rem 0 0;
  max-width: 33em;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-hero__actions {
  margin-top: 1.6rem;
  gap: 0.75rem;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
}

.page-about .about-hero__frame {
  aspect-ratio: 16 / 11;
  overflow: hidden;
  border: 1px solid var(--grid);
  background: linear-gradient(140deg, var(--ink-700), var(--ink-900));
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

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

.page-about .about-hero__media .figure__caption {
  margin-top: 0.7rem;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--text-dim);
}

@media (min-width: 940px) {
  .page-about .about-hero {
    padding-block: calc(var(--header-h) + 3.5rem) 3.5rem;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    gap: 3.5rem;
    align-items: center;
  }

  .page-about .about-hero__frame {
    aspect-ratio: 4 / 3;
  }
}

/* ---------- 关键数据带 ---------- */
.page-about .about-facts {
  position: relative;
  z-index: 1;
  width: var(--shell-wide);
  margin: 2.75rem auto 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.page-about .about-facts li {
  display: grid;
  gap: 0.3rem;
  padding: 1.1rem 1.25rem 1.2rem;
  background: linear-gradient(160deg, var(--ink-800), var(--ink-850));
}

.page-about .about-facts__num {
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-facts__label {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-dim);
}

@media (min-width: 620px) {
  .page-about .about-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1020px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 3.25rem;
  }
}

/* ---------- 起点与定位 ---------- */
.page-about .about-origin {
  padding-block: 4.25rem 4.5rem;
  background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-850) 100%);
}

.page-about .about-origin__head {
  width: var(--shell);
  margin-inline: auto;
}

.page-about .about-origin__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(1.55rem, 4.4vw, 2.45rem);
  line-height: 1.22;
}

.page-about .about-origin__lead {
  margin: 1rem 0 0;
  max-width: 44em;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-origin__grid {
  width: var(--shell);
  margin: 2.5rem auto 0;
  display: grid;
  gap: 1.15rem;
}

.page-about .about-origin__item {
  position: relative;
  padding: 1.5rem 1.3rem 1.6rem;
  border: 1px solid var(--grid);
  background: linear-gradient(150deg, var(--ink-800) 0%, var(--ink-850) 100%);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.page-about .about-origin__idx {
  display: block;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-origin__name {
  margin: 0.65rem 0 0;
  font-size: 1.16rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-origin__text {
  margin: 0.6rem 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--text-dim);
}

@media (min-width: 860px) {
  .page-about .about-origin {
    padding-block: 5.25rem;
  }

  .page-about .about-origin__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
  }

  .page-about .about-origin__item:nth-child(2) {
    transform: translateY(-1.9rem);
  }

  .page-about .about-origin__item:nth-child(3) {
    transform: translateY(1.4rem);
  }
}

/* ---------- 版本演进 ---------- */
.page-about .about-versions {
  position: relative;
  padding-block: 4.25rem 4.75rem;
  background: var(--ink-900);
}

.page-about .about-versions::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to bottom, rgba(30, 74, 60, 0.22) 1px, transparent 1px);
  background-size: 100% 56px;
  -webkit-mask-image: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.85) 22%, transparent 92%);
  mask-image: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.85) 22%, transparent 92%);
  pointer-events: none;
}

.page-about .about-versions__head {
  position: relative;
  width: var(--shell);
  margin-inline: auto;
  display: grid;
  gap: 1.75rem;
}

.page-about .about-versions__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(1.5rem, 4.2vw, 2.3rem);
  line-height: 1.24;
}

.page-about .about-versions__lead {
  margin: 0.95rem 0 0;
  max-width: 40em;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--text-dim);
}

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

.page-about .about-versions__frame {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1px solid var(--grid);
  background: linear-gradient(150deg, var(--ink-700), var(--ink-900));
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}

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

@media (min-width: 900px) {
  .page-about .about-versions {
    padding-block: 5.25rem 5.5rem;
  }

  .page-about .about-versions__head {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: end;
    gap: 3rem;
  }

  .page-about .about-versions__frame {
    aspect-ratio: 3 / 2;
  }
}

.page-about .about-track {
  position: relative;
  width: var(--shell);
  margin: 2.75rem auto 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1.1rem;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--grid) 20%, var(--grid) 74%, transparent 100%);
}

.page-about .about-track__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-rail-m) minmax(0, 1fr);
  gap: 0.75rem;
}

.page-about .about-track__node {
  position: relative;
  padding-top: 1.1rem;
}

.page-about .about-track__node::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 1.32rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 247, 214, 0.12);
}

.page-about .about-track__code {
  display: block;
  padding-top: 0.15rem;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
  writing-mode: horizontal-tb;
}

.page-about .about-track__item--current .about-track__node::before {
  border-color: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 138, 43, 0.16);
}

.page-about .about-track__item--current .about-track__code {
  color: var(--orange);
}

.page-about .about-track__card {
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--grid);
  background: linear-gradient(150deg, var(--ink-800) 0%, var(--ink-850) 100%);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.page-about .about-track__item--current .about-track__card {
  border-color: rgba(255, 138, 43, 0.45);
  box-shadow: var(--shadow-panel);
}

.page-about .about-track__summary {
  position: relative;
  display: grid;
  gap: 0.35rem;
  padding: 1.05rem 3rem 1.05rem 1.15rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-track__summary::after {
  content: "";
  position: absolute;
  right: 1.2rem;
  top: 1.55rem;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.2s var(--ease);
}

.page-about .about-track__card[open] .about-track__summary::after {
  transform: rotate(-135deg);
}

.page-about .about-track__item--current .about-track__summary::after {
  border-color: var(--orange);
}

.page-about .about-track__name {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-about .about-track__meta {
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.page-about .about-track__meta--current {
  color: var(--orange);
}

.page-about .about-track__body {
  padding: 0 1.15rem 1.25rem;
  border-top: 1px solid rgba(30, 74, 60, 0.7);
  margin-top: 0.1rem;
}

.page-about .about-track__body p {
  margin: 0.9rem 0 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--text-dim);
}

@media (min-width: 900px) {
  .page-about .about-track {
    margin-top: 3.25rem;
    gap: 1.35rem;
  }

  .page-about .about-track::before {
    left: 68px;
  }

  .page-about .about-track__item {
    grid-template-columns: var(--about-rail-d) minmax(0, 1fr);
    gap: 1.5rem;
  }

  .page-about .about-track__node::before {
    left: 59px;
    top: 1.5rem;
    width: 18px;
    height: 18px;
  }

  .page-about .about-track__code {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-align: right;
    padding-right: 1.6rem;
    padding-top: 0;
    line-height: 1.6;
  }

  .page-about .about-track__summary {
    padding: 1.25rem 3.2rem 1.25rem 1.5rem;
  }

  .page-about .about-track__name {
    font-size: 1.12rem;
  }

  .page-about .about-track__body {
    padding: 0 1.5rem 1.45rem;
  }
}

/* ---------- 数据能力 ---------- */
.page-about .about-capacity {
  padding-block: 4.25rem 4.5rem;
  background: linear-gradient(180deg, var(--ink-850) 0%, var(--ink-800) 100%);
}

.page-about .about-capacity__inner {
  width: var(--shell);
  margin-inline: auto;
}

.page-about .about-capacity__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(1.5rem, 4.2vw, 2.3rem);
  line-height: 1.24;
}

.page-about .about-capacity__lead {
  margin: 0.95rem 0 0;
  max-width: 42em;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-capacity__stats {
  margin-top: 2.25rem;
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-capacity__stats .stat {
  display: grid;
  gap: 0.25rem;
  padding: 1.1rem 1.2rem 1.2rem;
  background: var(--ink-900);
}

.page-about .about-capacity__stats .stat__value {
  display: flex;
  align-items: baseline;
  gap: 0.15rem;
  font-size: 1.85rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--orange);
}

.page-about .about-capacity__unit {
  font-style: normal;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-dim);
}

.page-about .about-capacity__stats .stat__label {
  font-size: 0.88rem;
  color: var(--text);
}

.page-about .about-capacity__stats .stat__note {
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--text-dim);
}

@media (min-width: 620px) {
  .page-about .about-capacity__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1020px) {
  .page-about .about-capacity__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-capacity__split {
  margin-top: 1.5rem;
  display: grid;
  gap: 1.25rem;
}

.page-about .about-capacity__panel {
  border: 1px solid var(--grid);
  background: linear-gradient(155deg, var(--ink-700) 0%, var(--ink-850) 100%);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.page-about .about-capacity__panel .panel__head {
  padding: 1.1rem 1.3rem 0.4rem;
}

.page-about .about-capacity__panel .panel__title {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-capacity__panel .panel__body {
  padding: 0.6rem 1.3rem 1.35rem;
}

.page-about .about-capacity__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
}

.page-about .about-capacity__list li {
  display: grid;
  gap: 0.2rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid rgba(30, 74, 60, 0.65);
}

.page-about .about-capacity__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-capacity__key {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-capacity__val {
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-capacity__text {
  margin: 0.4rem 0 0;
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-capacity__note {
  margin: 1rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px solid rgba(30, 74, 60, 0.65);
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--cyan-soft);
}

@media (min-width: 900px) {
  .page-about .about-capacity {
    padding-block: 5.25rem;
  }

  .page-about .about-capacity__split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 1.5rem;
    margin-top: 1.75rem;
  }
}

/* ---------- 团队与流程 ---------- */
.page-about .about-team {
  padding-block: 4.25rem 4.5rem;
  background: var(--ink-900);
}

.page-about .about-team__grid {
  width: var(--shell);
  margin-inline: auto;
  display: grid;
  gap: 1.9rem;
}

.page-about .about-team__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(1.5rem, 4.2vw, 2.3rem);
  line-height: 1.24;
}

.page-about .about-team__lead {
  margin: 0.95rem 0 0;
  max-width: 36em;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--text-dim);
}

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

.page-about .about-team__frame {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--grid);
  background: linear-gradient(140deg, var(--ink-700), var(--ink-900));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

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

.page-about .about-team__media .figure__caption {
  margin-top: 0.7rem;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-flow {
  width: var(--shell);
  margin: 2.5rem auto 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-flow__step {
  position: relative;
  display: grid;
  gap: 0.35rem;
  padding: 1.15rem 1.25rem 1.25rem;
  background: var(--ink-850);
}

.page-about .about-flow__step::after {
  content: "";
  position: absolute;
  left: 1.25rem;
  bottom: 0.55rem;
  width: 26px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.page-about .about-flow__idx {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .about-flow__name {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-flow__text {
  margin: 0;
  padding-bottom: 0.9rem;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--text-dim);
}

@media (min-width: 640px) {
  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-team {
    padding-block: 5.25rem;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
    gap: 3rem;
    align-items: center;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 3rem;
  }
}

/* ---------- 连看场景 ---------- */
.page-about .about-night {
  padding-block: 4.25rem 4.5rem;
  background:
    radial-gradient(760px 320px at 88% 0%, rgba(255, 138, 43, 0.1), transparent 66%),
    linear-gradient(180deg, var(--ink-850) 0%, var(--ink-800) 100%);
}

.page-about .about-night__head {
  width: var(--shell);
  margin-inline: auto;
}

.page-about .about-night__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(1.5rem, 4.2vw, 2.3rem);
  line-height: 1.24;
}

.page-about .about-night__lead {
  margin: 0.95rem 0 0;
  max-width: 40em;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-night__line {
  position: relative;
  width: var(--shell);
  margin: 2.5rem auto 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1.15rem;
}

.page-about .about-night__line::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(47, 247, 214, 0.08));
}

.page-about .about-night__step {
  position: relative;
  padding: 1.2rem 1.25rem 1.3rem 1.6rem;
  border: 1px solid var(--grid);
  background: linear-gradient(150deg, rgba(16, 48, 38, 0.9), rgba(6, 23, 16, 0.92));
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.page-about .about-night__time {
  display: inline-block;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-night__name {
  margin: 0.5rem 0 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-night__text {
  margin: 0.55rem 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-dim);
}

@media (min-width: 880px) {
  .page-about .about-night {
    padding-block: 5.25rem;
  }

  .page-about .about-night__line {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.25rem;
    margin-top: 3rem;
  }

  .page-about .about-night__line::before {
    left: 0;
    right: 0;
    top: 0;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--cyan), rgba(47, 247, 214, 0.12) 78%, transparent);
  }

  .page-about .about-night__step {
    padding: 1.5rem 1.25rem 1.4rem;
  }

  .page-about .about-night__step:nth-child(even) {
    transform: translateY(1.6rem);
  }
}

/* ---------- 合作与长期投入 ---------- */
.page-about .about-eco {
  padding-block: 4.25rem 4.25rem;
  background: var(--ink-900);
}

.page-about .about-eco__head {
  width: var(--shell);
  margin-inline: auto;
}

.page-about .about-eco__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(1.5rem, 4.2vw, 2.25rem);
  line-height: 1.26;
  max-width: 22em;
}

.page-about .about-eco__grid {
  width: var(--shell);
  margin: 2.5rem auto 0;
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-eco__item {
  display: grid;
  gap: 0.45rem;
  padding: 1.4rem 1.25rem 1.5rem;
  background: var(--ink-850);
}

.page-about .about-eco__num {
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--orange);
}

.page-about .about-eco__name {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-eco__text {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-eco__foot {
  width: var(--shell);
  margin: 1.75rem auto 0;
  padding-left: 1rem;
  border-left: 2px solid var(--cyan);
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--text-dim);
}

@media (min-width: 680px) {
  .page-about .about-eco__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1020px) {
  .page-about .about-eco {
    padding-block: 5.25rem;
  }

  .page-about .about-eco__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 3rem;
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding-block: 3.5rem 4.5rem;
  background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-850) 100%);
}

.page-about .about-cta__box {
  position: relative;
  width: var(--shell);
  margin-inline: auto;
  padding: 2rem 1.6rem 2.1rem;
  border: 1px solid rgba(47, 247, 214, 0.28);
  background:
    radial-gradient(560px 260px at 0% 0%, rgba(47, 247, 214, 0.13), transparent 68%),
    linear-gradient(150deg, var(--ink-700), var(--ink-900));
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, calc(var(--cut) * 2) 100%, 0 calc(100% - var(--cut)));
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(1.35rem, 3.8vw, 1.95rem);
  line-height: 1.3;
}

.page-about .about-cta__text {
  margin: 0.85rem 0 0;
  max-width: 40em;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-cta__actions {
  margin-top: 1.5rem;
  gap: 0.75rem;
}

@media (min-width: 900px) {
  .page-about .about-cta {
    padding-block: 4.5rem 5.5rem;
  }

  .page-about .about-cta__box {
    padding: 2.75rem 2.75rem 2.85rem;
  }
}