.page-about {
  --about-hair: rgba(31, 58, 61, .14);
  --about-panel: rgba(255, 255, 255, .74);
  background: var(--paper);
  overflow-x: clip;
}

/* -------- 基础排版 -------- */
.page-about p {
  font-family: var(--font-body);
  font-size: clamp(15.5px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--black);
  margin: 0 0 1em;
}

.page-about .ss-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(12px, 2vw, 18px);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--sand-deep);
}

.page-about .ss-kicker::before {
  content: "";
  flex: 0 0 auto;
  width: 26px;
  height: 2px;
  background: var(--cinnabar);
}

.page-about .ss-section--ink .ss-kicker {
  color: var(--sand);
}

.page-about .ss-lead {
  font-family: var(--font-body);
  font-size: clamp(16px, 1.8vw, 18.5px);
  line-height: 1.85;
  color: var(--ink);
  margin: 0 0 clamp(16px, 2.6vw, 24px);
}

.page-about .ss-section--ink .ss-lead {
  color: rgba(247, 244, 236, .82);
}

.page-about .about-heading {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(25px, 4.2vw, 40px);
  line-height: 1.24;
  letter-spacing: -.015em;
  color: var(--ink-deep);
  margin: 0 0 clamp(14px, 2.2vw, 22px);
  max-width: 22ch;
}

.page-about .ss-section--ink .about-heading,
.page-about .about-scale .about-heading {
  color: var(--paper);
}

.page-about .ss-section--ink p,
.page-about .about-scale p {
  color: rgba(247, 244, 236, .78);
}

/* -------- 首屏 -------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(22px, 3.4vw, 36px) clamp(46px, 7vw, 84px);
  background: var(--paper);
  border-bottom: 1px solid var(--about-hair);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 5px;
  background: linear-gradient(90deg,
    var(--cinnabar) 0 96px,
    var(--sand) 96px 300px,
    var(--ink) 300px 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -140px;
  top: -70px;
  width: min(460px, 54vw);
  height: min(460px, 54vw);
  border: 1px solid rgba(217, 179, 108, .55);
  background: repeating-linear-gradient(135deg,
    rgba(217, 179, 108, .14) 0 12px,
    transparent 12px 24px);
  transform: rotate(8deg);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__crumbs {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(22px, 3.6vw, 44px);
  margin-top: clamp(20px, 3.2vw, 36px);
}

.page-about .about-axis__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--moss);
}

.page-about .about-axis__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
}

.page-about .about-axis__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 10px;
  border-left: 2px solid transparent;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-about .about-axis__list a:hover,
.page-about .about-axis__list a:focus-visible {
  color: var(--cinnabar);
  border-left-color: var(--cinnabar);
  background: rgba(217, 179, 108, .18);
}

.page-about .about-axis__list .ss-mono {
  font-size: 12px;
  font-weight: 600;
  color: var(--sand-deep);
}

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(29px, 5.9vw, 56px);
  line-height: 1.14;
  letter-spacing: -.022em;
  color: var(--ink-deep);
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  max-width: 20ch;
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--cinnabar);
  box-shadow: inset 0 -.18em 0 rgba(217, 179, 108, .55);
}

.page-about .about-hero__lead {
  max-width: 660px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: 186px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 62px);
    align-items: start;
  }

  .page-about .about-axis__list {
    flex-direction: column;
    gap: 0;
  }
}

/* -------- 立场 -------- */
.page-about .ss-section--ink {
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-view__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 46px);
}

.page-about .about-view__points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(217, 179, 108, .3);
  border: 1px solid rgba(217, 179, 108, .3);
}

.page-about .about-view__points li {
  background: var(--ink-deep);
  padding: clamp(16px, 2.4vw, 24px);
}

.page-about .about-view__points h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--sand);
  letter-spacing: .01em;
}

.page-about .about-view__points p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 244, 236, .74);
}

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

@media (min-width: 940px) {
  .page-about .about-view__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .95fr);
    align-items: start;
    gap: clamp(36px, 5vw, 76px);
  }
}

/* -------- 图片通用 -------- */
.page-about .ss-figure {
  margin: 0;
}

.page-about .ss-figure--frame {
  padding: 8px;
  border: 1px solid var(--mist);
  background: rgba(255, 255, 255, .62);
}

.page-about .ss-figure__media {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .ss-figure__caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--moss);
}

.page-about .ss-section--ink .ss-figure--frame {
  border-color: rgba(217, 179, 108, .34);
  background: rgba(255, 255, 255, .04);
}

.page-about .ss-section--ink .ss-figure__caption {
  color: rgba(247, 244, 236, .6);
}

/* -------- 历程 -------- */
.page-about .about-journey {
  background: var(--paper);
}

.page-about .about-journey__lead {
  max-width: 640px;
}

.page-about .about-journey__layout {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 28px;
  padding-bottom: clamp(18px, 3vw, 28px);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 22px;
  bottom: 0;
  width: 1px;
  background: var(--mist);
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: 1px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--sand);
  box-shadow: 0 0 0 2px var(--paper), 0 0 0 3px var(--sand-deep);
}

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

.page-about .about-timeline__item:last-child::before {
  display: none;
}

.page-about .about-timeline__year {
  display: inline-block;
  margin-bottom: 10px;
  padding-bottom: 3px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--sand-deep);
  border-bottom: 2px solid var(--cinnabar);
}

.page-about .about-timeline__card {
  padding: clamp(16px, 2.2vw, 22px);
  background: var(--about-panel);
  border: 1px solid var(--mist);
  border-left: 3px solid var(--sand);
  box-shadow: var(--shadow-card);
  transition: transform .28s ease, box-shadow .28s ease, border-left-color .28s ease;
}

.page-about .about-timeline__card:hover {
  transform: translate(3px, -3px);
  box-shadow: var(--shadow-lift);
  border-left-color: var(--cinnabar);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: clamp(17px, 2.1vw, 20px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-deep);
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
}

@media (min-width: 760px) {
  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 0 30px;
    padding-left: 0;
  }

  .page-about .about-timeline__item::before {
    left: 133px;
    top: 4px;
    bottom: 0;
  }

  .page-about .about-timeline__item::after {
    display: none;
  }
}

@media (min-width: 1020px) {
  .page-about .about-journey__layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 360px);
    align-items: start;
  }

  .page-about .about-journey__figure {
    position: sticky;
    top: 142px;
  }
}

/* -------- 团队 -------- */
.page-about .about-team {
  background: var(--sand-light);
}

.page-about .about-team__lead {
  max-width: 620px;
}

.page-about .about-team__tabs {
  margin-top: clamp(24px, 3.4vw, 38px);
}

.page-about .ss-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .ss-tabs__tab {
  appearance: none;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid rgba(31, 58, 61, .18);
  border-radius: 0;
  background: rgba(255, 255, 255, .46);
  color: var(--ink);
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}

.page-about .ss-tabs__tab .ss-mono {
  font-size: 12px;
  font-weight: 600;
  color: var(--sand-deep);
}

.page-about .ss-tabs__tab:hover {
  background: rgba(255, 255, 255, .88);
}

.page-about .ss-tabs__tab[aria-selected="true"] {
  background: var(--paper);
  border-color: var(--ink);
  color: var(--ink-deep);
  box-shadow: inset 0 3px 0 var(--cinnabar);
}

.page-about .ss-tabs__panel {
  margin-top: 14px;
  padding: clamp(18px, 2.6vw, 32px);
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: var(--shadow-card);
}

.page-about .ss-tabs__panel[hidden] {
  display: none;
}

.page-about .ss-tabs__panel h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.3vw, 22px);
  font-weight: 700;
  color: var(--ink-deep);
}

.page-about .ss-tabs__panel p {
  margin: 0;
  font-size: 15.5px;
  max-width: 76ch;
}

.page-about .about-team__figure {
  margin-top: clamp(24px, 3.4vw, 40px);
}

/* -------- 规模 -------- */
.page-about .about-scale {
  position: relative;
  background: var(--ink-deep);
  color: var(--paper);
}

.page-about .about-scale__layout {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-about .about-scale__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(217, 179, 108, .3);
  border: 1px solid rgba(217, 179, 108, .3);
}

.page-about .about-scale__stat {
  background: var(--ink);
  padding: clamp(18px, 2.6vw, 26px);
}

.page-about .about-scale__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.2vw, 40px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--sand);
}

.page-about .about-scale__unit {
  display: block;
  margin-top: 6px;
  font-family: var(--font-head);
  font-size: 14.5px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-scale__stat p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 244, 236, .66);
}

@media (min-width: 560px) {
  .page-about .about-scale__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .about-scale__layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: center;
    gap: clamp(36px, 4.6vw, 64px);
  }
}

/* -------- 方法 -------- */
.page-about .about-method {
  background: var(--paper);
}

.page-about .about-method__steps {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}

.page-about .about-method__steps li {
  padding: clamp(18px, 2.4vw, 26px);
  background: rgba(255, 255, 255, .7);
  border: 1px solid var(--mist);
  border-top: 3px solid var(--sand);
  transition: border-top-color .24s ease, transform .24s ease;
}

.page-about .about-method__steps li:hover {
  border-top-color: var(--cinnabar);
  transform: translateY(-3px);
}

.page-about .about-method__num {
  display: block;
  margin-bottom: 10px;
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--sand-deep);
}

.page-about .about-method__steps h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink-deep);
}

.page-about .about-method__steps p {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.85;
}

.page-about .about-method__note {
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: clamp(16px, 2.2vw, 22px) clamp(18px, 2.6vw, 26px);
  max-width: 900px;
  background: var(--sand-light);
  border-left: 4px solid var(--sand-deep);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-deep);
}

.page-about .about-method__note a {
  color: var(--cinnabar);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

@media (min-width: 1080px) {
  .page-about .about-method__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* -------- 资质与合作 -------- */
.page-about .about-trust {
  background: var(--paper);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-trust__grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 22px);
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-trust__card {
  position: relative;
  padding: clamp(20px, 2.8vw, 30px);
  background: var(--sand-light);
  border: 1px solid rgba(166, 124, 61, .34);
}

.page-about .about-trust__card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 46px;
  height: 46px;
  background: linear-gradient(225deg, rgba(196, 90, 74, .18) 0 50%, transparent 50%);
  pointer-events: none;
}

.page-about .about-trust__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(17px, 2.2vw, 20px);
  font-weight: 700;
  color: var(--ink-deep);
}

.page-about .about-trust__card p {
  margin: 0;
  font-size: 15.2px;
  line-height: 1.85;
  color: var(--ink-deep);
}

.page-about .about-trust__chips {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ss-tag {
  display: inline-block;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--sand-deep);
  background: rgba(255, 255, 255, .66);
  border: 1px solid var(--sand-deep);
}

@media (min-width: 780px) {
  .page-about .about-trust__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-trust__card--wide {
    grid-column: 1 / -1;
  }
}

.page-about .about-join {
  background: var(--paper);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-join__panel {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
  padding: clamp(24px, 3.6vw, 44px);
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
}

.page-about .about-join__copy .about-heading {
  color: var(--paper);
}

.page-about .about-join__copy p {
  max-width: 620px;
  color: rgba(247, 244, 236, .8);
}

.page-about .about-join__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-about .about-join__contact {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(217, 179, 108, .3);
  border: 1px solid rgba(217, 179, 108, .3);
}

.page-about .about-join__contact li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 14px 18px;
  background: var(--ink-deep);
  font-size: 15px;
}

.page-about .about-join__contact .ss-mono {
  min-width: 42px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--sand);
}

.page-about .about-join__val {
  font-family: var(--font-body);
  color: var(--paper);
  word-break: break-word;
}

@media (min-width: 860px) {
  .page-about .about-join__panel {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .8fr);
    align-items: center;
    gap: clamp(32px, 4vw, 56px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__card,
  .page-about .about-method__steps li,
  .page-about .ss-tabs__tab {
    transition: none;
  }

  .page-about .about-timeline__card:hover,
  .page-about .about-method__steps li:hover {
    transform: none;
  }
}