.page-about {
  background: var(--ink);
  color: var(--on-dark);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-block: clamp(24px, 4vw, 44px) clamp(32px, 5.5vw, 68px);
  border-bottom: 1px solid var(--line);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 96px 96px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  margin-top: clamp(18px, 3vw, 34px);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }
}

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-size: clamp(34px, 6vw, 80px);
  font-weight: 900;
  line-height: 1.03;
  letter-spacing: -0.02em;
  margin: clamp(10px, 1.6vw, 18px) 0 0;
  color: var(--on-dark);
}

.page-about .about-hero__sub {
  max-width: 46ch;
  margin-top: clamp(14px, 2vw, 20px);
  color: var(--steel);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3vw, 42px);
  margin-top: clamp(22px, 3vw, 34px);
  padding-top: clamp(16px, 2.4vw, 24px);
  border-top: 1px solid var(--line);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-fact__label {
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--steel);
}

.page-about .about-hero__media {
  margin: 0;
  overflow: hidden;
  background: var(--moss);
  border: 1px solid var(--line-2);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

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

.page-about .about-hero__media .media__cap {
  padding: 10px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--steel);
  border-top: 1px solid var(--line);
}

/* ---------- 正文两栏 ---------- */

.page-about .about-body {
  display: grid;
  gap: clamp(24px, 3vw, 48px);
  padding-block: clamp(34px, 5vw, 72px);
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: minmax(160px, 208px) minmax(0, 1fr);
    align-items: start;
  }
}

/* 章节索引 */

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

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 7px 12px 7px 10px;
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  color: var(--steel);
  border: 1px solid var(--line-2);
  background: var(--moss);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--stone);
}

.page-about .about-index__link:hover,
.page-about .about-index__link.is-active {
  color: var(--lime);
  border-color: var(--lime);
  background: rgba(200, 240, 74, .08);
}

.page-about .about-index__link.is-active .about-index__no {
  color: var(--lime);
}

@media (min-width: 960px) {
  .page-about .about-index {
    position: sticky;
    top: 104px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 2px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .about-index__link {
    border: 0;
    border-left: 2px solid transparent;
    background: none;
    clip-path: none;
    padding: 8px 10px;
    white-space: normal;
  }

  .page-about .about-index__link:hover {
    background: none;
    border-left-color: var(--line-2);
  }

  .page-about .about-index__link.is-active {
    border-left-color: var(--lime);
    background: rgba(200, 240, 74, .07);
  }
}

/* ---------- 章节 ---------- */

.page-about .about-chapter {
  padding-block: clamp(28px, 4vw, 54px);
  border-top: 1px solid var(--line);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 22px);
  align-items: baseline;
  margin-bottom: clamp(18px, 2.6vw, 30px);
}

.page-about .about-chapter__no {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.4vw, 26px);
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--lime);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(24px, 3.6vw, 44px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--on-dark);
}

.page-about .about-chapter__body > * + * {
  margin-top: clamp(14px, 1.8vw, 22px);
}

.page-about .about-chapter__body p {
  max-width: 68ch;
  margin: 0;
  font-size: clamp(15.5px, 1.05vw, 17px);
  line-height: 1.78;
  color: var(--steel);
}

.page-about .about-chapter__body h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(18px, 1.8vw, 22px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--on-dark);
}

.page-about .about-chapter__body a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 三步走 ---------- */

.page-about .about-steps {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.page-about .about-steps__item {
  padding: 18px 18px 20px;
  background: var(--moss);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-about .about-steps__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-steps__title {
  margin: 12px 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--on-dark);
}

.page-about .about-steps__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 覆盖 ---------- */

.page-about .about-coverage {
  display: grid;
  gap: clamp(18px, 2.6vw, 34px);
  align-items: start;
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--turf);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

@media (min-width: 820px) {
  .page-about .about-coverage {
    grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 48px);
  }
}

.page-about .about-dots {
  display: block;
  width: 100%;
  height: auto;
  max-width: 300px;
}

.page-about .about-dots circle {
  fill: var(--lime);
  opacity: .82;
}

.page-about .about-coverage__cap {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--steel);
}

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

.page-about .about-zone > li {
  display: grid;
  gap: 6px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

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

@media (min-width: 620px) {
  .page-about .about-zone > li {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }
}

.page-about .about-zone__name {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--amber);
}

.page-about .about-zone__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--steel);
}

.page-about .about-chapter__figure {
  margin: 0;
  overflow: hidden;
  background: var(--moss);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

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

.page-about .about-chapter__figure .media__cap {
  padding: 10px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--steel);
  border-top: 1px solid var(--line);
}

/* ---------- 场馆类型 ---------- */

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

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

.page-about .about-types__item {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 16px 18px 18px;
  background: var(--ink);
}

.page-about .about-types__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

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

.page-about .about-team__media .media {
  overflow: hidden;
  background: var(--moss);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

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

.page-about .about-team__media .media__cap {
  padding: 10px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--steel);
  border-top: 1px solid var(--line);
}

.page-about .about-team__accordion .accordion__trigger {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 15px 0;
  background: none;
  border: 0;
  border-bottom: 1px solid var(--line);
  color: var(--on-dark);
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition: color .18s var(--ease);
}

.page-about .about-team__accordion .accordion__trigger:hover,
.page-about .about-team__accordion .accordion__trigger:focus-visible {
  color: var(--lime);
}

.page-about .about-team__count {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-team__accordion .accordion__panel-inner {
  padding: 12px 0 4px;
}

.page-about .about-team__accordion .accordion__panel-inner p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 版本时间轴 ---------- */

.page-about .about-timeline {
  display: grid;
  gap: clamp(18px, 2.4vw, 26px);
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 820px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(16px, 2vw, 28px);
  }
}

.page-about .about-timeline__node {
  position: relative;
  padding-top: 26px;
  border-top: 2px solid var(--moss);
  transition: border-color .2s var(--ease);
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: 2px solid var(--steel);
  transform: rotate(45deg);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .about-timeline__node:hover,
.page-about .about-timeline__node:focus-within {
  border-color: var(--lime);
}

.page-about .about-timeline__node:hover::before,
.page-about .about-timeline__node:focus-within::before {
  border-color: var(--lime);
  background: var(--lime);
}

.page-about .about-timeline__ver {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--amber);
}

.page-about .about-timeline__node h3 {
  margin: 10px 0 8px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  color: var(--on-dark);
}

.page-about .about-timeline__node p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 服务标准 ---------- */

.page-about .about-standards {
  background: var(--bone);
  color: var(--on-light);
  padding: clamp(20px, 3vw, 36px);
  clip-path: polygon(0 0, calc(100% - var(--chamfer)) 0, 100% var(--chamfer), 100% 100%, var(--chamfer) 100%, 0 calc(100% - var(--chamfer)));
}

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

.page-about .about-standards__item {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(18, 33, 28, .16);
}

.page-about .about-standards__item:first-child {
  padding-top: 0;
}

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

@media (min-width: 720px) {
  .page-about .about-standards__item {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(16px, 3vw, 40px);
    align-items: baseline;
  }
}

.page-about .about-standards__k {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--moss);
}

.page-about .about-standards__v {
  font-size: 15px;
  line-height: 1.75;
  color: var(--on-light);
}

/* ---------- 底部动作 ---------- */

.page-about .about-cta {
  border-top: 1px solid var(--line);
  background: var(--night);
}

.page-about .about-cta__inner {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 2.4vw, 30px);
  align-items: center;
  justify-content: space-between;
  padding-block: clamp(28px, 4vw, 54px);
}

.page-about .about-cta__text {
  max-width: 46ch;
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(16px, 1.7vw, 21px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--on-dark);
}

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