.page-about .about-cover {
  position: relative;
  overflow: hidden;
  padding: clamp(40px, 6vw, 76px) 0 clamp(38px, 5vw, 64px);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(115% 85% at 84% -10%, rgba(138, 92, 246, 0.24), transparent 62%),
    radial-gradient(80% 70% at 4% 8%, rgba(34, 224, 214, 0.13), transparent 66%);
}

.page-about .about-cover-inner {
  position: relative;
}

.page-about .about-cover .eyebrow {
  margin: 22px 0 20px;
}

.page-about .about-cover .headline {
  margin: 0 0 24px;
}

.page-about .about-cover .lede {
  max-width: 62ch;
  margin: 0;
  color: rgba(242, 235, 221, 0.82);
}

.page-about .about-cover-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.1;
  color: var(--orange);
}

.page-about .about-stat-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--mute);
}

.page-about .about-frame-grid {
  display: grid;
  gap: 34px;
}

.page-about .about-index-title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mute);
}

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

.page-about .about-index-list li {
  flex: 0 0 auto;
}

.page-about .about-index-list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  color: rgba(242, 235, 221, 0.78);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-index-list a .mono {
  color: var(--cyan);
  font-size: 11px;
}

.page-about .about-index-list a:hover,
.page-about .about-index-list a:focus-visible {
  color: var(--white);
  border-color: var(--line-strong);
  outline: none;
}

.page-about .about-chapter {
  padding-bottom: clamp(48px, 7vw, 88px);
  margin-bottom: clamp(48px, 7vw, 88px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-chapter:last-of-type {
  border-bottom: 0;
}

.page-about .about-chapter .eyebrow {
  margin: 0 0 14px;
}

.page-about .about-chapter .headline {
  margin: 0 0 22px;
}

.page-about .about-chapter .prose {
  max-width: 70ch;
  color: rgba(242, 235, 221, 0.78);
}

.page-about .about-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 1px;
}

.page-about .about-inline-link:hover {
  color: var(--white);
  border-bottom-color: var(--cyan);
}

/* 时间线 */
.page-about .about-timeline {
  position: relative;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(138, 92, 246, 0.6), rgba(34, 224, 214, 0));
}

.page-about .about-tl-item {
  position: relative;
  padding: 0 0 30px 34px;
}

.page-about .about-tl-item:last-child {
  padding-bottom: 0;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 0;
  width: 13px;
  height: 13px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--ink-900);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-tl-item:hover::before,
.page-about .about-tl-item:focus-within::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 224, 214, 0.16);
}

.page-about .about-tl-year {
  display: inline-block;
  margin-bottom: 6px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .about-tl-title {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 500;
  color: var(--white);
}

.page-about .about-tl-note {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 235, 221, 0.72);
  transition: color var(--dur) var(--ease);
}

.page-about .about-tl-item:hover .about-tl-note {
  color: rgba(242, 235, 221, 0.92);
}

/* 暖纸引文 */
.page-about .about-quote {
  margin: 36px 0 0;
  padding: clamp(24px, 4vw, 40px);
}

.page-about .about-quote p {
  margin: 0;
  font-size: clamp(18px, 2.4vw, 24px);
  line-height: 1.7;
  color: var(--paper-ink);
}

.page-about .about-quote p::first-letter {
  float: left;
  font-size: 3.1em;
  line-height: 0.92;
  padding: 4px 12px 0 0;
  font-weight: 700;
  color: #0A0F1E;
}

.page-about .about-quote-sign {
  margin-top: 18px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--paper-muted);
}

.page-about .about-quote-sign::first-letter {
  float: none;
  font-size: inherit;
  padding: 0;
  font-weight: 400;
  color: inherit;
}

/* 图片 */
.page-about .about-figure {
  margin: 0 0 26px;
}

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

.page-about .about-figure--side {
  margin-bottom: 0;
}

/* 团队分工 */
.page-about .about-roles {
  display: grid;
  gap: 20px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-role {
  padding: 18px 20px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--ink-700);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-role:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.page-about .about-role-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .about-role-name {
  font-size: 17px;
  font-weight: 500;
  color: var(--white);
}

.page-about .about-role-num {
  font-size: 12px;
  color: var(--cyan);
}

.page-about .about-role-track {
  height: 6px;
  margin: 12px 0 12px;
  border-radius: 999px;
  background: rgba(138, 150, 168, 0.18);
  overflow: hidden;
}

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

.page-about .fill-data {
  width: 100%;
  background: linear-gradient(90deg, var(--cyan), rgba(34, 224, 214, 0.45));
}

.page-about .fill-video {
  width: 78%;
  background: linear-gradient(90deg, var(--violet), rgba(138, 92, 246, 0.45));
}

.page-about .fill-version {
  width: 56%;
  background: linear-gradient(90deg, var(--amber), rgba(255, 176, 32, 0.45));
}

.page-about .fill-community {
  width: 33%;
  background: linear-gradient(90deg, var(--mute), rgba(138, 150, 168, 0.35));
}

.page-about .about-role-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 235, 221, 0.7);
}

/* 档案工序 */
.page-about .about-archive-grid {
  display: grid;
  gap: 30px;
  margin-top: 8px;
}

.page-about .about-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--line-soft);
  overflow: hidden;
}

.page-about .about-step {
  padding: 20px 18px 22px;
  background: var(--ink-700);
}

.page-about .about-step-num {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--violet);
}

.page-about .about-step h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 500;
  color: var(--white);
}

.page-about .about-step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(242, 235, 221, 0.7);
}

/* 补丁同步 */
.page-about .about-patch-stats {
  display: grid;
  gap: 18px;
  margin: 30px 0 34px;
}

.page-about .about-patch-stat {
  padding: 22px 22px 24px;
  border-left: 2px solid var(--orange);
  background: linear-gradient(100deg, rgba(255, 90, 43, 0.1), rgba(13, 20, 38, 0.2) 70%);
}

.page-about .about-patch-num {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(40px, 7vw, 64px);
  line-height: 1;
  color: var(--orange);
}

.page-about .about-patch-unit {
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--paper-dim);
}

.page-about .about-patch-desc {
  margin: 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(242, 235, 221, 0.76);
}

.page-about .about-sub-title {
  margin: 0 0 18px;
  font-size: 18px;
  font-weight: 500;
  color: var(--white);
}

.page-about .about-cats {
  display: grid;
  gap: 14px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.page-about .about-cats li {
  display: grid;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-cats p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 235, 221, 0.7);
}

.page-about .about-cats .tag {
  justify-self: start;
}

/* 合作网络 */
.page-about .about-net-grid {
  display: grid;
  gap: 16px;
  margin: 28px 0 0;
}

.page-about .about-net-node {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--ink-700);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-net-node::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 42px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-net-node:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}

.page-about .about-net-count {
  display: block;
  margin-bottom: 10px;
  font-size: 20px;
  color: var(--cyan);
}

.page-about .about-net-node h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 500;
  color: var(--white);
}

.page-about .about-net-node p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 235, 221, 0.7);
}

.page-about .about-cadence {
  margin-top: 24px;
  padding: 22px 20px 24px;
}

.page-about .about-cadence-title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mute);
}

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

.page-about .about-cadence li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(242, 235, 221, 0.8);
}

.page-about .about-cadence li .mono {
  min-width: 62px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

/* 内容准则 */
.page-about .about-rules {
  display: grid;
  gap: 22px;
  margin: 24px 0 30px;
  padding: 0;
  list-style: none;
}

.page-about .about-rules li {
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.page-about .about-rule-num {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-rules h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 500;
  color: var(--white);
}

.page-about .about-rules p {
  margin: 0;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(242, 235, 221, 0.72);
}

/* 后续入口 */
.page-about .about-next {
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background:
    radial-gradient(110% 120% at 100% 0%, rgba(138, 92, 246, 0.18), transparent 60%),
    var(--ink-700);
}

.page-about .about-next .section-title {
  margin: 0 0 12px;
}

.page-about .about-next .prose {
  max-width: 62ch;
  margin: 0 0 24px;
  color: rgba(242, 235, 221, 0.76);
}

.page-about .about-next-links {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.page-about .about-next-links a {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 6px 14px;
  padding: 16px 18px;
  background: var(--ink-800);
  color: rgba(242, 235, 221, 0.82);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-next-links a:hover,
.page-about .about-next-links a:focus-visible {
  background: var(--ink-600);
  color: var(--white);
  outline: none;
}

.page-about .about-next-links .mono {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-next-label {
  font-size: 16px;
  font-weight: 500;
}

.page-about .about-next-desc {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mute);
}

@media (min-width: 620px) {
  .page-about .about-cover-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

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

  .page-about .about-next-links a {
    grid-template-columns: auto 220px 1fr;
    align-items: baseline;
  }

  .page-about .about-next-desc {
    grid-column: 3;
  }
}

@media (min-width: 960px) {
  .page-about .about-frame-grid {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 112px;
    align-self: start;
    padding-right: 8px;
  }

  .page-about .about-index-list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-index-list li {
    margin-bottom: 2px;
  }

  .page-about .about-index-list a {
    border: 0;
    border-left: 1px solid var(--line-soft);
    border-radius: 0;
    padding: 10px 0 10px 14px;
    font-size: 14px;
    white-space: normal;
    line-height: 1.5;
  }

  .page-about .about-index-list a:hover,
  .page-about .about-index-list a:focus-visible {
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, rgba(34, 224, 214, 0.1), transparent 85%);
  }

  .page-about .about-archive-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 36px;
    align-items: start;
  }

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

  .page-about .about-figure--side {
    position: sticky;
    top: 112px;
  }

  .page-about .about-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 28px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-rules {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-net-node,
  .page-about .about-tl-item::before {
    transition: none;
  }

  .page-about .about-role:hover,
  .page-about .about-net-node:hover {
    transform: none;
  }
}