.page-about {
  --about-paper-ink: #0c1f1a;
  --about-paper-sub: #40544c;
  --about-paper-line: #d9cdb4;
  --about-accent-deep: #0b6f5e;
  background: var(--ink-900);
  color: var(--white);
  padding-bottom: 72px;
  overflow-x: hidden;
}

.page-about .container {
  max-width: 1160px;
}

/* 面包屑 */
.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--silver);
}

.page-about .about-crumb a {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-crumb__now {
  color: var(--white);
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  gap: 30px;
  padding: 22px 0 0;
}

.page-about .about-hero__title {
  margin: 12px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 8vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-hero__lede {
  max-width: 33em;
  color: rgba(237, 245, 241, 0.82);
}

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

.page-about .about-hero__visual {
  position: relative;
  overflow: hidden;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 120% at 78% 12%, rgba(43, 231, 200, 0.16), transparent 62%),
    linear-gradient(160deg, var(--ink-800) 0%, var(--ink-950) 100%);
}

.page-about .about-hero__visual svg {
  display: block;
  width: 100%;
  height: auto;
}

/* 首屏数据条 */
.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--ink-800);
}

.page-about .about-fact__value {
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .about-fact__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--silver);
}

/* 区块节奏 */
.page-about .about-section {
  margin-top: 64px;
}

/* 暖纸色面板 */
.page-about .paper-panel {
  position: relative;
  overflow: hidden;
  padding: 30px 22px;
  border-radius: var(--radius-lg);
  background: var(--paper);
  color: var(--about-paper-ink);
}

.page-about .paper-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--cyan), var(--amber) 55%, var(--orange));
  opacity: 0.85;
}

.page-about .paper-panel .eyebrow {
  color: var(--about-accent-deep);
}

.page-about .paper-panel .section-title {
  color: var(--about-paper-ink);
}

.page-about .paper-panel p {
  color: var(--about-paper-sub);
}

/* 起点与今天 */
.page-about .about-origin__grid {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-about .about-origin__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
}

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

.page-about .about-origin__data {
  margin: 0;
  border-top: 1px solid var(--about-paper-line);
}

.page-about .about-origin__data > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-paper-line);
}

.page-about .about-origin__data dt {
  font-size: 13px;
  line-height: 1.6;
  color: var(--about-paper-sub);
}

.page-about .about-origin__data dd {
  margin: 0;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--about-paper-ink);
  text-align: right;
}

/* 团队分工 */
.page-about .about-team__grid {
  display: grid;
  gap: 30px;
}

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

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.page-about .about-team__caption {
  margin: 12px 2px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--silver);
}

.page-about .about-team__intro {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(237, 245, 241, 0.76);
}

.page-about .team-roles {
  display: grid;
  gap: 18px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team-role {
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-about .team-role__top {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .team-role__no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--silver);
}

.page-about .team-role__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .team-role__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .team-role__desc {
  margin: 8px 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(237, 245, 241, 0.74);
}

.page-about .team-role__desc a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 231, 200, 0.4);
}

.page-about .team-role__desc a:hover {
  border-bottom-color: var(--cyan);
}

.page-about .team-role__bar {
  height: 6px;
  border-radius: var(--radius-pill);
  background: rgba(154, 166, 161, 0.16);
  overflow: hidden;
}

.page-about .team-role__fill {
  display: block;
  height: 100%;
  border-radius: inherit;
}

.page-about .team-role:nth-child(1) .team-role__fill {
  width: 37.5%;
  background: var(--cyan);
}

.page-about .team-role:nth-child(2) .team-role__fill {
  width: 18.75%;
  background: var(--orange);
}

.page-about .team-role:nth-child(3) .team-role__fill {
  width: 18.75%;
  background: var(--amber);
}

.page-about .team-role:nth-child(4) .team-role__fill {
  width: 25%;
  background: var(--silver);
}

/* 版本时间线 */
.page-about .about-versions__lede {
  margin-bottom: 26px;
}

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

.page-about .version-track::before {
  content: "";
  position: absolute;
  top: 14px;
  bottom: 14px;
  left: 7px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(43, 231, 200, 0.5) 45%, rgba(43, 231, 200, 0.08) 100%);
}

.page-about .version-item {
  position: relative;
  margin-bottom: 12px;
  padding-left: 30px;
}

.page-about .version-item::before {
  content: "";
  position: absolute;
  top: 22px;
  left: 2px;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink-900);
}

.page-about .version-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--ink-800);
}

.page-about .version-card[open] {
  border-color: rgba(43, 231, 200, 0.4);
}

.page-about .version-summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .version-summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

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

.page-about .version-no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--silver);
}

.page-about .version-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .version-year {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber);
}

.page-about .version-text {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(237, 245, 241, 0.76);
}

/* 覆盖范围 */
.page-about .about-reach__lede {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.78;
}

.page-about .reach-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 18px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .reach-cell {
  padding-top: 12px;
  border-top: 2px solid var(--about-paper-ink);
}

.page-about .reach-cell__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--about-paper-ink);
}

.page-about .reach-cell__num small {
  font-size: 16px;
}

.page-about .reach-cell__label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--about-paper-sub);
}

.page-about .reach-media {
  margin: 30px 0 0;
}

.page-about .reach-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.page-about .reach-media figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--about-paper-sub);
}

/* 合作生态 */
.page-about .about-partners__lede {
  margin-bottom: 0;
}

.page-about .partner-index {
  display: grid;
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .partner-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px;
  background: var(--ink-800);
}

.page-about .partner-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .partner-name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .partner-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(237, 245, 241, 0.72);
}

.page-about .partner-media {
  margin: 26px 0 0;
}

.page-about .partner-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.page-about .partner-media figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--silver);
}

/* 确认到位 */
.page-about .check-list {
  display: grid;
  gap: 18px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .check-item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--about-paper-line);
}

.page-about .check-no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--about-accent-deep);
}

.page-about .check-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: -0.01em;
  color: var(--about-paper-ink);
}

.page-about .check-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
}

/* 荣誉与下一步 */
.page-about .awards-grid {
  display: grid;
  gap: 34px;
}

.page-about .award-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .award-tags .tag {
  padding: 10px 16px;
  font-size: 12px;
  line-height: 1.45;
  white-space: normal;
  border-radius: var(--radius-pill);
}

.page-about .award-tags .tag--cyan {
  color: var(--cyan);
  border: 1px solid rgba(43, 231, 200, 0.42);
  background: var(--cyan-soft);
}

.page-about .award-tags .tag--amber {
  color: var(--amber);
  border: 1px solid rgba(255, 194, 75, 0.42);
  background: rgba(255, 194, 75, 0.08);
}

.page-about .awards-sub {
  margin: 14px 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .awards-col--next p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(237, 245, 241, 0.76);
}

/* 平板与桌面 */
@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .reach-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 28px;
  }

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

  .page-about .paper-panel {
    padding: 44px 40px;
  }
}

@media (min-width: 900px) {
  .page-about {
    padding-bottom: 104px;
  }

  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 56px;
    align-items: center;
    padding: 52px 0 0;
  }

  .page-about .about-section {
    margin-top: 104px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 46px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .check-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 36px;
  }

  .page-about .awards-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 56px;
    align-items: start;
  }
}