.page-about {
  --about-rule: rgba(176, 138, 74, 0.3);
  --about-rule-soft: rgba(176, 138, 74, 0.16);
  --about-canvas: var(--wb-paper);
  background: var(--about-canvas);
  color: var(--wb-ink);
  overflow-x: hidden;
}

.page-about .about-crumb-wrap {
  padding-block: 1rem 0.5rem;
}

.page-about .wb-crumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
}

.page-about .wb-crumb-link {
  color: var(--wb-sage);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 140ms var(--wb-ease), border-color 140ms var(--wb-ease);
}

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

.page-about .wb-crumb-current {
  color: var(--wb-ink);
  font-weight: 600;
}

.page-about .wb-crumb-item + .wb-crumb-item::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--wb-gold);
}

/* 首屏声明 */
.page-about .about-masthead {
  padding-block: clamp(1.5rem, 4vw, 3rem) clamp(1.5rem, 3vw, 2.5rem);
}

.page-about .about-masthead .wb-wrap {
  border-left: 3px solid var(--wb-gold);
  padding-left: clamp(1rem, 3vw, 2rem);
}

.page-about .wb-eyebrow {
  font-family: var(--wb-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--wb-gold);
  margin: 0 0 1rem;
}

.page-about .about-masthead h1 {
  font-family: var(--wb-font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 4.4rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 1.25rem;
  max-width: 22ch;
  color: var(--wb-ink);
}

.page-about .about-lead {
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.85;
  max-width: 62ch;
  margin: 0;
  color: #2b3a35;
}

.page-about .about-meta {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  padding: clamp(1rem, 2.5vw, 1.5rem) 0 0;
  border-top: 1px solid var(--about-rule);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.25rem;
}

.page-about .about-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.page-about .about-meta-val {
  font-family: var(--wb-font-mono);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 600;
  line-height: 1;
  color: var(--wb-ink);
}

.page-about .about-meta-key {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--wb-sage);
}

/* 主体网格 */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  padding-block: clamp(1.5rem, 4vw, 2.5rem) clamp(3rem, 7vw, 5rem);
}

.page-about .about-index {
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
  padding-block: 0.9rem;
}

.page-about .about-index-title {
  font-family: var(--wb-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--wb-gold);
  margin: 0 0 0.6rem;
}

.page-about .about-index-nav {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.35rem;
  scrollbar-width: thin;
}

.page-about .about-index-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--about-rule-soft);
  border-radius: var(--wb-radius);
  font-size: 0.8125rem;
  color: #2b3a35;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 150ms var(--wb-ease), color 150ms var(--wb-ease),
    background-color 150ms var(--wb-ease);
}

.page-about .about-index-num {
  font-family: var(--wb-font-mono);
  font-size: 0.6875rem;
  color: var(--wb-gold);
}

.page-about .about-index-link:hover,
.page-about .about-index-link:focus-visible {
  border-color: var(--wb-cyan);
  color: var(--wb-ink);
  outline: none;
}

.page-about .about-index-link[aria-current="true"] {
  background: var(--wb-ink-green);
  border-color: var(--wb-ink-green);
  color: var(--wb-paper-light);
}

.page-about .about-index-link[aria-current="true"] .about-index-num {
  color: var(--wb-cyan);
}

.page-about .about-content {
  min-width: 0;
}

/* 章节 */
.page-about .about-chapter {
  position: relative;
  padding-block: clamp(2rem, 5vw, 3.25rem);
  border-top: 1px solid var(--about-rule);
}

.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: 0.7rem;
  align-items: baseline;
  margin-bottom: 1.25rem;
}

.page-about .about-num {
  font-family: var(--wb-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--wb-gold);
  padding-top: 0.5rem;
}

.page-about .about-chapter-head h2 {
  font-family: var(--wb-font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 3.6vw, 2.25rem);
  line-height: 1.28;
  letter-spacing: -0.005em;
  margin: 0;
  max-width: 24ch;
}

.page-about .about-prose {
  max-width: 66ch;
}

.page-about .about-prose p {
  font-size: clamp(1rem, 1.5vw, 1.0625rem);
  line-height: 1.9;
  margin: 0 0 1rem;
  color: #24322d;
}

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

/* 图版 */
.page-about .about-plate {
  margin: clamp(1.25rem, 3vw, 2rem) 0;
  background: var(--wb-teal);
  border: 1px solid var(--about-rule);
  border-radius: var(--wb-radius);
  overflow: hidden;
  box-shadow: 0 1px 0 rgba(11, 33, 27, 0.06), 0 12px 28px -22px rgba(11, 33, 27, 0.5);
}

.page-about .about-plate img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.94;
}

/* 读者卡 */
.page-about .about-readers {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-rule-soft);
  border: 1px solid var(--about-rule);
  border-radius: var(--wb-radius);
  margin-top: clamp(1.25rem, 3vw, 2rem);
  overflow: hidden;
}

.page-about .about-reader {
  background: var(--wb-paper-light);
  padding: 1.15rem 1.1rem 1.25rem;
  transition: background-color 160ms var(--wb-ease);
}

.page-about .about-reader:hover {
  background: var(--wb-gold-light);
}

.page-about .about-reader h3 {
  font-family: var(--wb-font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0 0 0.5rem;
  color: var(--wb-ink);
}

.page-about .about-reader p {
  font-size: 0.9375rem;
  line-height: 1.75;
  margin: 0;
  color: #2b3a35;
}

/* 版本对照 */
.page-about .about-version-wrap {
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
  overflow-x: auto;
  border: 1px solid var(--about-rule);
  border-radius: var(--wb-radius);
}

.page-about .about-version-table {
  width: 100%;
  min-width: 34rem;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.page-about .about-version-table caption {
  caption-side: top;
  text-align: left;
  padding: 0.85rem 1rem;
  font-family: var(--wb-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--wb-gold);
  background: var(--wb-paper-light);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-version-table thead th {
  background: var(--wb-gold-light);
  font-family: var(--wb-font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-align: left;
  padding: 0.7rem 1rem;
  color: var(--wb-ink);
  white-space: nowrap;
}

.page-about .about-version-table tbody th {
  font-family: var(--wb-font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  text-align: left;
  padding: 0.85rem 1rem;
  color: var(--wb-ink);
  background: var(--wb-paper-light);
  white-space: nowrap;
}

.page-about .about-version-table tbody td {
  padding: 0.85rem 1rem;
  line-height: 1.7;
  color: #2b3a35;
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-version-table tbody tr:nth-child(even) td {
  background: rgba(231, 214, 179, 0.28);
}

/* 版本关系图 */
.page-about .about-diagram-figure {
  margin: clamp(1.25rem, 3vw, 2rem) 0;
  padding: clamp(0.9rem, 2.5vw, 1.5rem);
  background: var(--wb-paper-light);
  border: 1px solid var(--about-rule);
  border-radius: var(--wb-radius);
}

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

.page-about .about-diagram .d-line {
  stroke: var(--wb-gold);
  opacity: 0.75;
}

.page-about .about-diagram .d-origin {
  fill: var(--wb-ink-green);
}

.page-about .about-diagram .d-box {
  fill: rgba(231, 214, 179, 0.4);
  stroke: var(--wb-gold);
  stroke-width: 1;
}

.page-about .about-diagram .d-box--alt {
  fill: rgba(255, 122, 92, 0.12);
  stroke: var(--wb-coral);
}

.page-about .about-diagram .d-box--thin {
  fill: transparent;
  stroke: var(--wb-sage);
  stroke-dasharray: 3 3;
}

.page-about .about-diagram .d-title {
  font-family: var(--wb-font-mono);
  font-size: 13px;
  fill: var(--wb-ink);
  font-weight: 600;
}

.page-about .about-diagram .d-sub {
  font-family: var(--wb-font-body);
  font-size: 11.5px;
  fill: var(--wb-sage);
}

.page-about .about-diagram .d-label {
  font-family: var(--wb-font-mono);
  font-size: 12px;
  fill: var(--wb-ink);
}

.page-about .about-diagram-figure figcaption {
  margin-top: 0.85rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--about-rule-soft);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--wb-sage);
}

/* 引用式原则 */
.page-about .about-quote {
  margin: clamp(1.25rem, 3vw, 1.75rem) 0;
  padding: 1.15rem 1.25rem 1.15rem 1.4rem;
  border-left: 3px solid var(--wb-coral);
  background: var(--wb-teal);
  border-radius: 0 var(--wb-radius) var(--wb-radius) 0;
}

.page-about .about-quote p {
  font-family: var(--wb-font-display);
  font-weight: 900;
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  line-height: 1.6;
  margin: 0 0 0.7rem;
  color: var(--wb-paper-light);
}

.page-about .about-quote cite {
  font-style: normal;
  font-family: var(--wb-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--wb-cyan);
}

/* 团队角色 */
.page-about .about-roles {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-rule-soft);
  border: 1px solid var(--about-rule);
  border-radius: var(--wb-radius);
  overflow: hidden;
}

.page-about .about-role {
  background: var(--wb-paper-light);
  padding: 1.1rem 1.1rem 1.2rem;
  position: relative;
  transition: background-color 160ms var(--wb-ease);
}

.page-about .about-role:hover {
  background: rgba(73, 242, 208, 0.12);
}

.page-about .about-role-num {
  font-family: var(--wb-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--wb-gold);
  display: block;
  margin-bottom: 0.4rem;
}

.page-about .about-role h3 {
  font-family: var(--wb-font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  margin: 0 0 0.45rem;
  color: var(--wb-ink);
}

.page-about .about-role p {
  font-size: 0.9375rem;
  line-height: 1.75;
  margin: 0;
  color: #2b3a35;
}

.page-about .about-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0;
  padding: 0.85rem 1rem;
  border: 1px dashed var(--about-rule);
  border-radius: var(--wb-radius);
}

.page-about .about-flow-step {
  font-family: var(--wb-font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--wb-ink);
  background: var(--wb-gold-light);
  padding: 0.3rem 0.7rem;
  border-radius: var(--wb-radius);
}

.page-about .about-flow-arrow {
  color: var(--wb-gold);
  font-size: 0.875rem;
}

/* 深色面板 */
.page-about .about-dark {
  --about-rule: rgba(231, 214, 179, 0.24);
  --about-rule-soft: rgba(231, 214, 179, 0.14);
  position: relative;
  overflow: hidden;
  background: var(--wb-ink-green);
  color: var(--wb-paper-light);
  border-top: 0;
  margin-block: clamp(1rem, 3vw, 2rem);
  padding-block: clamp(2rem, 5vw, 3.5rem);
  border-radius: var(--wb-radius);
}

.page-about .about-dark-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-dark-bg img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.13;
}

.page-about .about-dark-inner {
  position: relative;
  z-index: 1;
  padding-inline: clamp(1rem, 3vw, 2rem);
}

.page-about .about-dark .about-chapter-head {
  margin-bottom: 0.9rem;
}

.page-about .about-dark .about-chapter-head h2 {
  color: var(--wb-paper-light);
}

.page-about .about-dark .about-num {
  color: var(--wb-cyan);
}

.page-about .about-dark-lead {
  max-width: 56ch;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(251, 248, 241, 0.76);
  margin: 0 0 1.5rem;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.15rem;
  border-left: 1px solid rgba(231, 214, 179, 0.35);
}

.page-about .about-tl-item {
  position: relative;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -1.36rem;
  top: 1.28rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--wb-gold);
  box-shadow: 0 0 0 3px var(--wb-ink-green);
  transition: background-color 150ms var(--wb-ease);
}

.page-about .about-tl-item:hover::before,
.page-about .about-tl-item:focus-within::before {
  background: var(--wb-cyan);
}

.page-about .about-fold {
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-fold > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.95rem 0;
  cursor: pointer;
  list-style: none;
  transition: color 150ms var(--wb-ease);
}

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

.page-about .about-fold > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--wb-font-mono);
  font-size: 1rem;
  color: var(--wb-gold);
  line-height: 1;
}

.page-about .about-fold[open] > summary::after {
  content: "–";
  color: var(--wb-cyan);
}

.page-about .about-fold > summary:hover,
.page-about .about-fold > summary:focus-visible {
  color: var(--wb-cyan);
  outline: none;
}

.page-about .about-tl-year {
  font-family: var(--wb-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--wb-gold);
  min-width: 4.5rem;
}

.page-about .about-tl-title {
  font-family: var(--wb-font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  color: inherit;
}

.page-about .about-fold-body {
  padding: 0 0 1.1rem;
  max-width: 58ch;
}

.page-about .about-fold-body p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: rgba(251, 248, 241, 0.78);
}

/* 更新节奏 */
.page-about .about-cadence {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-rule-soft);
  border: 1px solid var(--about-rule);
  border-radius: var(--wb-radius);
  overflow: hidden;
  margin-bottom: clamp(1.25rem, 3vw, 1.75rem);
}

.page-about .about-cadence-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.4rem;
  background: var(--wb-paper-light);
  padding: 1rem 1.1rem 1.1rem;
}

.page-about .about-cadence-cycle {
  font-family: var(--wb-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--wb-gold);
}

.page-about .about-cadence-row p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: #2b3a35;
}

/* 协作生态 */
.page-about .about-partners {
  --about-rule: rgba(231, 214, 179, 0.22);
  --about-rule-soft: rgba(231, 214, 179, 0.12);
  background: var(--wb-teal);
  color: var(--wb-paper-light);
  border-top: 0;
  border-radius: var(--wb-radius);
  margin-top: clamp(1rem, 3vw, 2rem);
  padding: clamp(1.75rem, 4.5vw, 3rem) clamp(1rem, 3.5vw, 2.25rem);
}

.page-about .about-partners .about-chapter-head h2 {
  color: var(--wb-paper-light);
}

.page-about .about-partners .about-num {
  color: var(--wb-cyan);
}

.page-about .about-partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-bottom: clamp(1.5rem, 4vw, 2.25rem);
}

.page-about .about-partner {
  border: 1px solid var(--about-rule);
  border-radius: var(--wb-radius);
  padding: 1rem 1.05rem 1.1rem;
  transition: border-color 150ms var(--wb-ease), transform 150ms var(--wb-ease);
}

.page-about .about-partner:hover,
.page-about .about-partner:focus-within {
  border-color: var(--wb-cyan);
  transform: translateY(-2px);
}

.page-about .about-partner h3 {
  font-family: var(--wb-font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  margin: 0 0 0.45rem;
  color: var(--wb-gold-light);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: rgba(251, 248, 241, 0.78);
}

.page-about .about-sub-title {
  font-family: var(--wb-font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--wb-paper-light);
  margin: 0 0 0.85rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-channels {
  list-style: none;
  margin: 0 0 clamp(1.5rem, 4vw, 2.25rem);
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.6rem;
}

.page-about .about-channels li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: rgba(251, 248, 241, 0.82);
}

.page-about .about-channels li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 1px;
  background: var(--wb-gold);
}

/* 联系方式 */
.page-about .about-contact {
  border-top: 1px solid var(--about-rule);
  padding-top: clamp(1.25rem, 3vw, 1.75rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
}

.page-about .about-contact-label {
  font-family: var(--wb-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--wb-gold);
  margin: 0 0 0.5rem;
}

.page-about .about-contact-mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.6rem;
}

.page-about .about-contact-mail a {
  font-family: var(--wb-font-mono);
  font-size: clamp(0.9375rem, 2.2vw, 1.0625rem);
  color: var(--wb-paper-light);
  text-decoration: none;
  border-bottom: 1px solid var(--wb-gold);
  word-break: break-all;
  transition: color 150ms var(--wb-ease), border-color 150ms var(--wb-ease);
}

.page-about .about-contact-mail a:hover,
.page-about .about-contact-mail a:focus-visible {
  color: var(--wb-cyan);
  border-bottom-color: var(--wb-cyan);
  outline: none;
}

.page-about .about-copy {
  font-family: var(--wb-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  padding: 0.4rem 0.7rem;
  background: transparent;
  color: var(--wb-cyan);
  border: 1px solid rgba(73, 242, 208, 0.55);
  border-radius: var(--wb-radius);
  cursor: pointer;
  transition: background-color 150ms var(--wb-ease), color 150ms var(--wb-ease);
}

.page-about .about-copy:hover,
.page-about .about-copy:focus-visible {
  background: var(--wb-cyan);
  color: var(--wb-ink-deep);
  outline: none;
}

.page-about .about-copy[data-copied="true"] {
  background: var(--wb-coral);
  border-color: var(--wb-coral);
  color: var(--wb-ink-deep);
}

.page-about .about-contact-note {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.8;
  color: rgba(251, 248, 241, 0.66);
  max-width: 48ch;
}

.page-about .about-contact-list {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
}

.page-about .about-contact-item dt {
  font-family: var(--wb-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--wb-gold);
  margin-bottom: 0.25rem;
}

.page-about .about-contact-item dd {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(251, 248, 241, 0.9);
  word-break: break-word;
}

.page-about .about-contact-item .wb-mono {
  font-family: var(--wb-font-mono);
}

/* 章节末尾短索引 */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding-top: 0.85rem;
  border-top: 1px solid var(--about-rule-soft);
  font-size: 0.8125rem;
}

.page-about .about-jump-label {
  font-family: var(--wb-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--wb-gold);
}

.page-about .about-jump a {
  color: var(--wb-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--about-rule);
  padding-bottom: 1px;
  transition: border-color 150ms var(--wb-ease), color 150ms var(--wb-ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--wb-teal);
  border-bottom-color: var(--wb-coral);
  outline: none;
}

.page-about .about-jump-dot {
  color: var(--wb-sage);
}

.page-about .about-jump--dark a {
  color: var(--wb-paper-light);
  border-bottom-color: var(--wb-gold);
}

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

.page-about .about-jump--dark .about-jump-label {
  color: var(--wb-gold);
}

.page-about .about-jump--dark .about-jump-dot {
  color: rgba(251, 248, 241, 0.5);
}

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

  .page-about .about-cadence-row {
    grid-template-columns: 5.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1rem;
  }

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

  .page-about .about-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem 1.5rem;
  }

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

@media (min-width: 900px) {
  .page-about .about-meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-contact {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 2.25rem;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: var(--wb-index-w) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 1.5rem;
    border-top: 0;
    border-bottom: 0;
    border-left: 1px solid var(--about-rule);
    padding: 0 0 0 1rem;
  }

  .page-about .about-index-nav {
    flex-direction: column;
    overflow-x: visible;
    gap: 0.2rem;
    padding-bottom: 0;
  }

  .page-about .about-index-link {
    justify-content: flex-start;
    border-color: transparent;
    border-left: 2px solid transparent;
    padding: 0.5rem 0.6rem;
    white-space: normal;
    border-radius: 0;
  }

  .page-about .about-index-link:hover,
  .page-about .about-index-link:focus-visible {
    border-left-color: var(--wb-cyan);
    background: rgba(231, 214, 179, 0.28);
  }

  .page-about .about-index-link[aria-current="true"] {
    background: transparent;
    border-color: transparent;
    border-left-color: var(--wb-gold);
    color: var(--wb-ink);
    font-weight: 600;
  }

  .page-about .about-index-link[aria-current="true"] .about-index-num {
    color: var(--wb-gold);
  }

  .page-about .about-chapter {
    padding-block: clamp(2.25rem, 4vw, 3.5rem);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-partner:hover,
  .page-about .about-partner:focus-within {
    transform: none;
  }

  .page-about .about-index-link,
  .page-about .about-jump a,
  .page-about .about-copy,
  .page-about .about-reader,
  .page-about .about-role {
    transition: none;
  }
}
<<<END>>>