.page-about {
  --about-gap: clamp(20px, 4vw, 40px);
  --about-grid-line: rgba(53, 232, 198, .07);
  position: relative;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4.6vw, 52px) 0 clamp(38px, 6vw, 76px);
  background:
    radial-gradient(120% 100% at 10% 0%, rgba(53, 232, 198, .14), transparent 58%),
    radial-gradient(90% 90% at 92% 6%, rgba(154, 107, 255, .13), transparent 62%),
    linear-gradient(180deg, rgba(14, 46, 40, .88), rgba(8, 32, 28, 0));
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-mask-image: radial-gradient(78% 72% at 26% 18%, #000, transparent 76%);
  mask-image: radial-gradient(78% 72% at 26% 18%, #000, transparent 76%);
  pointer-events: none;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__glow {
  position: absolute;
  top: -70px;
  right: -80px;
  width: 340px;
  height: 340px;
  pointer-events: none;
  opacity: .55;
}

.page-about .breadcrumb,
.page-about .breadcrumb a {
  color: var(--mist);
  font-size: 13px;
}

.page-about .breadcrumb a:hover {
  color: var(--cyan);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  margin-top: 22px;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.6vw, 54px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

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

.page-about .about-quick__item {
  position: relative;
  padding: 15px 14px 15px 17px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: linear-gradient(170deg, rgba(14, 46, 40, .94), rgba(8, 32, 28, .8));
  box-shadow: var(--shadow-island);
  overflow: hidden;
}

.page-about .about-quick__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(53, 232, 198, 0));
}

.page-about .about-quick__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--cyan);
}

.page-about .about-quick__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* ============ 章节分隔带 ============ */
.page-about .about-divider {
  height: 14px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background-image: repeating-linear-gradient(
    45deg,
    rgba(216, 207, 186, .08) 0 1px,
    transparent 1px 12px
  );
}

/* ============ 章节头 ============ */
.page-about .about-chapter .chapter-head {
  margin-bottom: clamp(22px, 3.6vw, 38px);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-chapter .chapter-head__num {
  font-family: var(--font-mono);
  color: var(--amber);
  letter-spacing: .12em;
}

.page-about .about-chapter .chapter-head__title {
  font-family: var(--font-editorial);
  font-weight: 600;
  color: var(--paper);
}

/* ============ 通用图片容器 ============ */
.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--ink-soft);
}

.page-about .media-frame__cap {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-figure {
  margin: 0 0 clamp(24px, 3.6vw, 38px);
}

/* ============ 时间线 ============ */
.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl__node {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 22px 0 22px 24px;
  border-left: 1px solid rgba(53, 232, 198, .3);
}

.page-about .about-tl__node:last-child {
  border-left-color: rgba(53, 232, 198, .08);
}

.page-about .about-tl__node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 28px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 232, 198, .1);
}

.page-about .about-tl__idx {
  display: inline-block;
  padding: 3px 14px 3px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--black);
  background: var(--amber);
  clip-path: polygon(0 0, 100% 0, calc(100% - 9px) 100%, 0 100%);
}

.page-about .about-tl__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-tl__text {
  margin: 10px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-tl__fold {
  margin-top: 14px;
  border-top: 1px dashed var(--line);
}

.page-about .about-tl__fold summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--cyan);
}

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

.page-about .about-tl__fold summary::after {
  content: " +";
  color: var(--violet);
}

.page-about .about-tl__fold[open] summary::after {
  content: " −";
}

.page-about .about-tl__fold p {
  margin: 10px 0 0;
  max-width: 64ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

/* ============ 类目 ============ */
.page-about .about-catalog {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

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

.page-about .about-catalog__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-about .about-catalog__item {
  position: relative;
  padding: 15px 16px 15px 18px;
  border: 1px solid var(--line);
  border-left: 2px solid rgba(53, 232, 198, .45);
  border-radius: var(--radius-s);
  background: rgba(14, 46, 40, .6);
  transition: border-left-color .3s ease, background-color .3s ease;
}

.page-about .about-catalog__item:hover {
  border-left-color: var(--cyan);
  background: rgba(26, 158, 140, .14);
}

.page-about .about-catalog__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--teal);
}

.page-about .about-catalog__name {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-catalog__desc {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-pool {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-pool__item {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: linear-gradient(190deg, rgba(14, 46, 40, .75), rgba(8, 32, 28, .55));
}

.page-about .about-pool__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--cyan);
}

.page-about .about-pool__text {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ============ 评分标准 ============ */
.page-about .about-rubric__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-rubric {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-rubric__row {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  padding: 16px 10px;
  border-bottom: 1px solid var(--line);
  transition: background-color .3s ease;
}

.page-about .about-rubric__row:hover {
  background: rgba(53, 232, 198, .055);
}

.page-about .about-rubric__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--violet);
}

.page-about .about-rubric__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-rubric__desc {
  margin: 7px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

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

.page-about .about-review {
  margin-top: clamp(24px, 4vw, 44px);
  padding: clamp(20px, 3vw, 32px);
}

.page-about .about-review__title {
  margin: 0;
  font-family: var(--font-editorial);
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-review__text {
  margin: 12px 0 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(4, 18, 15, .78);
}

.page-about .about-review__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-review__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(4, 18, 15, .8);
}

.page-about .about-review__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--violet);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-review__list strong {
  color: var(--ink);
  font-weight: 700;
}

/* ============ 团队 ============ */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-donut {
  position: relative;
  width: min(228px, 60vw);
  aspect-ratio: 1 / 1;
  margin: 0 auto;
  display: grid;
  place-items: center;
}

.page-about .about-donut__ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(
    from -90deg,
    var(--cyan) 0 29.03%,
    var(--teal) 29.03% 64.51%,
    var(--amber) 64.51% 79.03%,
    var(--violet) 79.03% 100%
  );
  -webkit-mask: radial-gradient(circle, transparent 0 57%, #000 57.5%);
  mask: radial-gradient(circle, transparent 0 57%, #000 57.5%);
}

.page-about .about-donut__center {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 4px;
  text-align: center;
}

.page-about .about-donut__num {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}

.page-about .about-donut__label {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-team__item {
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: rgba(14, 46, 40, .58);
  transition: border-color .3s ease;
}

.page-about .about-team__item[open] {
  border-color: rgba(53, 232, 198, .42);
}

.page-about .about-team__item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 15px;
}

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

.page-about .about-team__dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-radius: 2px;
}

.page-about .about-team__dot--cyan {
  background: var(--cyan);
}

.page-about .about-team__dot--teal {
  background: var(--teal);
}

.page-about .about-team__dot--amber {
  background: var(--amber);
}

.page-about .about-team__dot--violet {
  background: var(--violet);
}

.page-about .about-team__name {
  font-family: var(--font-display);
  font-size: 15.5px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
}

.page-about .about-team__duty {
  margin: 0;
  padding: 0 15px 15px 34px;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ============ 合作生态 ============ */
.page-about .about-eco {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-eco__card {
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: linear-gradient(180deg, rgba(14, 46, 40, .86), rgba(8, 32, 28, .66));
  overflow: hidden;
}

.page-about .about-eco__card::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
}

.page-about .about-eco__card--cyan::after {
  background: linear-gradient(90deg, var(--cyan), transparent 78%);
}

.page-about .about-eco__card--teal::after {
  background: linear-gradient(90deg, var(--teal), transparent 78%);
}

.page-about .about-eco__card--amber::after {
  background: linear-gradient(90deg, var(--amber), transparent 78%);
}

.page-about .about-eco__card--violet::after {
  background: linear-gradient(90deg, var(--violet), transparent 78%);
}

.page-about .about-eco__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--paper);
}

.page-about .about-eco__title {
  margin: 8px 0 0;
  font-family: var(--font-editorial);
  font-size: 16px;
  font-weight: 600;
  color: var(--cyan);
}

.page-about .about-eco__text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

/* ============ 服务范围 ============ */
.page-about .about-region {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-region__text p {
  margin: 0 0 16px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-region__text p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-region__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-region__facts {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-region__facts > div {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 12px;
  padding: 13px 15px;
  background: var(--ink-soft);
}

.page-about .about-region__facts dt {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--teal);
}

.page-about .about-region__facts dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

/* ============ 尾段入口 ============ */
.page-about .about-next {
  padding: clamp(34px, 6vw, 72px) 0 clamp(40px, 7vw, 84px);
  background:
    radial-gradient(90% 120% at 88% 0%, rgba(154, 107, 255, .16), transparent 62%),
    linear-gradient(180deg, rgba(8, 32, 28, 0), rgba(14, 46, 40, .82));
}

.page-about .about-next__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.6vw, 40px);
  padding: clamp(22px, 3.6vw, 38px);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: rgba(14, 46, 40, .6);
  box-shadow: var(--shadow-island);
}

.page-about .about-next__eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--amber);
}

.page-about .about-next__title {
  margin: 0;
  font-family: var(--font-editorial);
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 600;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-next__text {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-next__links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.page-about .about-next__link {
  display: block;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: rgba(8, 32, 28, .6);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: border-color .3s ease, transform .3s ease, background-color .3s ease;
}

.page-about .about-next__link span {
  display: block;
  margin-top: 4px;
  font-family: var(--font-body);
  font-size: 12.5px;
  font-weight: 400;
  color: var(--mist);
}

.page-about .about-next__link:hover {
  border-color: var(--cyan);
  background: rgba(53, 232, 198, .08);
  transform: translateY(-2px);
}

.page-about .about-next__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-about .about-catalog__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-about .about-pool {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-tl__node {
    grid-template-columns: 132px 1fr;
    gap: 26px;
    padding-left: 32px;
  }

  .page-about .about-team {
    grid-template-columns: 250px 1fr;
    align-items: center;
  }

  .page-about .about-region {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .about-review__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-review__list li {
    padding-left: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.55fr 1fr;
    align-items: start;
  }

  .page-about .about-hero__side {
    padding-top: 6px;
  }

  .page-about .about-catalog {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-about .about-rubric__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .about-checklist {
    position: sticky;
    top: 96px;
  }

  .page-about .about-eco {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .about-eco__card:nth-child(1) {
    grid-column: span 7;
  }

  .page-about .about-eco__card:nth-child(2) {
    grid-column: span 5;
  }

  .page-about .about-eco__card:nth-child(3) {
    grid-column: span 5;
  }

  .page-about .about-eco__card:nth-child(4) {
    grid-column: span 7;
  }

  .page-about .about-next__panel {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

@media (min-width: 1080px) {
  .page-about .about-quick {
    gap: 12px;
  }

  .page-about .about-catalog__list {
    gap: 12px;
  }
}
<<<END>>>