.page-about {
  --about-edge: 2px solid rgba(201, 210, 208, 0.28);
  --about-edge-soft: 1px solid rgba(201, 210, 208, 0.16);
  --about-panel: #0F2C2A;
  --about-tint: rgba(200, 255, 61, 0.12);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 40px) 0 clamp(28px, 5vw, 56px);
  background: linear-gradient(148deg, var(--sf-ink) 0 47%, var(--sf-night) 47% 100%);
  border-bottom: var(--about-edge);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(115deg, rgba(201, 210, 208, 0.06) 0 1px, transparent 1px 16px);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -12%;
  right: -12%;
  top: 38%;
  height: 8px;
  background: linear-gradient(90deg, transparent, var(--sf-orange) 18%, var(--sf-orange) 62%, transparent);
  opacity: 0.45;
  transform: rotate(-5deg);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-hero__split {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  margin-top: clamp(16px, 3vw, 28px);
}

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

.page-about .about-hero__lead h1 {
  margin: 10px 0 0;
  font-family: var(--sf-font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--sf-fog);
  font-size: clamp(1.9rem, 5.6vw, 3.4rem);
  text-wrap: balance;
}

.page-about .about-hero__lead .sf-lede {
  margin: 14px 0 0;
  max-width: 60ch;
  color: var(--sf-silver);
  font-size: clamp(0.95rem, 1.6vw, 1.06rem);
  line-height: 1.75;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .about-hero__media {
  position: relative;
  min-width: 0;
  margin: 0;
  border: var(--about-edge);
  border-radius: var(--sf-radius-lg);
  background: var(--about-panel);
  box-shadow: var(--sf-shadow-hard);
  overflow: hidden;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-hero__media .sf-media__caption {
  display: block;
  padding: 10px 14px;
  font-family: var(--sf-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--sf-stand);
  background: rgba(6, 42, 36, 0.9);
  border-top: var(--about-edge-soft);
}

/* ---------- 首屏统计 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(8px, 1.6vw, 14px);
  margin: clamp(20px, 3.4vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stats__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 14px 12px;
  border: var(--about-edge);
  border-radius: var(--sf-radius);
  background: rgba(15, 44, 42, 0.86);
  box-shadow: var(--sf-shadow-hard);
  min-width: 0;
}

.page-about .about-stats__num {
  font-family: var(--sf-font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  line-height: 1;
  color: var(--sf-lime);
}

.page-about .about-stats__label {
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--sf-silver);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  padding-top: clamp(26px, 4vw, 48px);
  padding-bottom: clamp(30px, 5vw, 64px);
}

.page-about .about-toc {
  min-width: 0;
  padding: 14px;
  border: var(--about-edge);
  border-radius: var(--sf-radius);
  background: var(--about-panel);
  box-shadow: var(--sf-shadow-soft);
}

.page-about .about-toc__title {
  margin: 0 0 10px;
  font-family: var(--sf-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sf-stand);
}

.page-about .about-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-toc__link {
  display: inline-block;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid rgba(201, 210, 208, 0.26);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--sf-silver);
  text-decoration: none;
  transition: color 160ms var(--sf-ease), border-color 160ms var(--sf-ease), background 160ms var(--sf-ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--sf-ink);
  background: var(--sf-lime);
  border-color: var(--sf-lime);
}

.page-about .about-toc__callout {
  display: none;
  margin-top: 16px;
  padding-top: 14px;
  border-top: var(--about-edge-soft);
}

.page-about .about-toc__callout p {
  margin: 0 0 8px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--sf-silver);
}

.page-about .about-toc__cta {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--sf-orange);
  text-decoration: none;
  border-bottom: 2px solid rgba(255, 106, 43, 0.5);
}

.page-about .about-toc__cta:hover,
.page-about .about-toc__cta:focus-visible {
  color: var(--sf-lime);
  border-color: var(--sf-lime);
}

/* ---------- 章节 ---------- */
.page-about .about-chapters {
  min-width: 0;
  display: grid;
  gap: clamp(22px, 3.4vw, 42px);
}

.page-about .about-chapter {
  min-width: 0;
  padding-top: clamp(4px, 1vw, 10px);
  scroll-margin-top: 104px;
}

.page-about .about-chapter + .about-chapter {
  padding-top: clamp(18px, 3vw, 30px);
  border-top: 1px solid rgba(201, 210, 208, 0.24);
}

.page-about .about-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}

.page-about .about-chapter__idx {
  flex: none;
  font-family: var(--sf-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--sf-orange);
}

.page-about .about-chapter__head .sf-title {
  margin: 0;
  font-family: var(--sf-font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: clamp(1.28rem, 3.4vw, 1.85rem);
  line-height: 1.22;
  color: var(--sf-fog);
  text-wrap: balance;
}

.page-about .about-chapter__text {
  margin: 0 0 16px;
  color: var(--sf-silver);
  font-size: 0.96rem;
  line-height: 1.78;
}

/* ---------- 双卡 ---------- */
.page-about .about-duo {
  display: grid;
  gap: clamp(10px, 2vw, 16px);
}

.page-about .about-duo__card {
  padding: 16px 16px 18px;
  border: var(--about-edge);
  border-left: 6px solid var(--sf-lime);
  border-radius: var(--sf-radius);
  background: var(--about-panel);
  box-shadow: var(--sf-shadow-soft);
  min-width: 0;
}

.page-about .about-duo__card--alt {
  border-left-color: var(--sf-orange);
}

.page-about .about-duo__title {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--sf-fog);
}

.page-about .about-duo__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--sf-silver);
}

/* ---------- 时间线 ---------- */
.page-about .about-filters {
  margin-top: 4px;
}

.page-about .about-filters .sf-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0 0 0 14px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: repeating-linear-gradient(180deg, rgba(255, 106, 43, 0.65) 0 8px, transparent 8px 16px);
}

.page-about .about-node {
  position: relative;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 14px;
  border: var(--about-edge);
  border-radius: var(--sf-radius);
  background: var(--about-panel);
  box-shadow: var(--sf-shadow-hard);
  min-width: 0;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -15px;
  top: 22px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sf-lime);
  box-shadow: 0 0 0 3px rgba(6, 42, 36, 1);
}

.page-about .about-node__year {
  font-family: var(--sf-font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--sf-lime);
  letter-spacing: 0.02em;
  padding-top: 2px;
}

.page-about .about-node__title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--sf-fog);
}

.page-about .about-node__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--sf-silver);
}

.page-about [data-filter-item][hidden] {
  display: none;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 10px;
}

.page-about .about-team__item {
  border: var(--about-edge);
  border-radius: var(--sf-radius);
  background: var(--about-panel);
  box-shadow: var(--sf-shadow-soft);
  overflow: hidden;
}

.page-about .about-team__item .sf-disclosure__trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--sf-fog);
  font: inherit;
}

.page-about .about-team__num {
  flex: none;
  font-family: var(--sf-font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--sf-lime);
  min-width: 2.4ch;
}

.page-about .about-team__name {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 0.98rem;
  font-weight: 700;
}

.page-about .about-team__item .sf-disclosure__icon {
  flex: none;
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--sf-orange);
  border-bottom: 2px solid var(--sf-orange);
  transform: rotate(45deg);
  transition: transform 180ms var(--sf-ease);
}

.page-about .about-team__item .sf-disclosure__trigger[aria-expanded="true"] .sf-disclosure__icon {
  transform: rotate(225deg);
}

.page-about .about-team__item .sf-disclosure__panel {
  padding: 0 16px 16px 16px;
  border-top: var(--about-edge-soft);
  padding-top: 12px;
}

.page-about .about-team__item .sf-disclosure__panel p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--sf-silver);
}

/* ---------- 流程 ---------- */
.page-about .about-workflow {
  display: grid;
  gap: clamp(14px, 2.4vw, 22px);
}

.page-about .about-workflow__steps {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.page-about .about-step {
  position: relative;
  padding: 14px 16px 16px;
  border: var(--about-edge);
  border-radius: var(--sf-radius);
  background: linear-gradient(160deg, rgba(15, 44, 42, 1) 0%, rgba(10, 29, 56, 0.95) 100%);
  box-shadow: var(--sf-shadow-soft);
  min-width: 0;
}

.page-about .about-step__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  margin-bottom: 8px;
  border-radius: 8px;
  color: var(--sf-lime);
  background: rgba(200, 255, 61, 0.1);
  border: 1px solid rgba(200, 255, 61, 0.32);
}

.page-about .about-step__idx {
  display: block;
  font-family: var(--sf-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--sf-orange);
  margin-bottom: 4px;
}

.page-about .about-step__title {
  margin: 0 0 6px;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--sf-fog);
}

.page-about .about-step__text {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.7;
  color: var(--sf-silver);
}

.page-about .about-workflow__media {
  margin: 0;
  align-self: start;
  border: var(--about-edge);
  border-radius: var(--sf-radius-lg);
  overflow: hidden;
  background: var(--about-panel);
  box-shadow: var(--sf-shadow-hard);
  min-width: 0;
}

.page-about .about-workflow__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-workflow__media .sf-media__caption {
  display: block;
  padding: 10px 14px;
  font-family: var(--sf-font-mono);
  font-size: 0.72rem;
  color: var(--sf-stand);
  border-top: var(--about-edge-soft);
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  display: grid;
  gap: clamp(12px, 2.2vw, 20px);
}

.page-about .about-partners__media {
  margin: 0;
  border: var(--about-edge);
  border-radius: var(--sf-radius-lg);
  overflow: hidden;
  background: var(--about-panel);
  box-shadow: var(--sf-shadow-hard);
  min-width: 0;
}

.page-about .about-partners__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-about .about-partners__media .sf-media__caption {
  display: block;
  padding: 10px 14px;
  font-family: var(--sf-font-mono);
  font-size: 0.72rem;
  color: var(--sf-stand);
  border-top: var(--about-edge-soft);
}

.page-about .about-modes {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  min-width: 0;
}

.page-about .about-modes__item {
  padding: 14px 16px;
  border: var(--about-edge);
  border-radius: var(--sf-radius);
  background: var(--about-panel);
  box-shadow: var(--sf-shadow-soft);
  min-width: 0;
}

.page-about .about-modes__title {
  margin: 0 0 6px;
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--sf-lime);
}

.page-about .about-modes__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--sf-silver);
}

/* ---------- 荣誉与节奏 ---------- */
.page-about .about-honor {
  display: grid;
  gap: clamp(12px, 2.2vw, 20px);
}

.page-about .about-honor__card {
  padding: 18px;
  border: var(--about-edge);
  border-radius: var(--sf-radius-lg);
  background: linear-gradient(150deg, rgba(200, 255, 61, 0.1) 0%, rgba(15, 44, 42, 1) 55%);
  box-shadow: var(--sf-shadow-hard);
  min-width: 0;
}

.page-about .about-honor__title {
  margin: 10px 0 8px;
  font-family: var(--sf-font-display);
  font-size: clamp(1.05rem, 2.6vw, 1.3rem);
  font-weight: 800;
  line-height: 1.34;
  color: var(--sf-fog);
}

.page-about .about-honor__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--sf-silver);
}

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

.page-about .about-honor__lead {
  margin: 0 0 12px;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--sf-silver);
}

.page-about .about-honor__list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .about-honor__list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--sf-fog);
}

.page-about .about-honor__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--sf-orange);
  transform: skewX(-14deg);
}

.page-about .about-link {
  display: inline-block;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--sf-lime);
  text-decoration: none;
  border-bottom: 2px solid rgba(200, 255, 61, 0.45);
  padding-bottom: 2px;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--sf-orange);
  border-color: var(--sf-orange);
}

/* ---------- 本地支持 ---------- */
.page-about .about-chapter--local {
  border-radius: var(--sf-radius-lg);
}

.page-about .about-local {
  display: grid;
  gap: clamp(12px, 2.2vw, 20px);
}

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

.page-about .about-local__text p {
  margin: 0 0 12px;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--sf-silver);
}

.page-about .about-local__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.page-about .about-local__card {
  margin: 0;
  padding: 16px;
  border: var(--about-edge);
  border-left: 6px solid var(--sf-orange);
  border-radius: var(--sf-radius);
  background: var(--about-panel);
  box-shadow: var(--sf-shadow-hard);
  min-width: 0;
}

.page-about .about-local__line {
  padding: 10px 0;
  border-bottom: var(--about-edge-soft);
}

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

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

.page-about .about-local__label {
  font-family: var(--sf-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--sf-stand);
  margin-bottom: 4px;
}

.page-about .about-local__value {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.64;
  color: var(--sf-fog);
  word-break: break-word;
}

/* ---------- 下一站 ---------- */
.page-about .about-next {
  padding-top: clamp(18px, 3vw, 30px);
  border-top: 1px solid rgba(201, 210, 208, 0.24);
}

.page-about .about-next__title {
  margin: 0 0 12px;
  font-family: var(--sf-font-display);
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  font-weight: 800;
  color: var(--sf-fog);
}

.page-about .about-next__grid {
  display: grid;
  gap: 10px;
}

.page-about .about-next__item {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  grid-template-areas: "idx name" "idx desc";
  column-gap: 10px;
  padding: 14px 16px;
  border: var(--about-edge);
  border-radius: var(--sf-radius);
  background: rgba(15, 44, 42, 0.9);
  text-decoration: none;
  box-shadow: var(--sf-shadow-soft);
  transition: transform 180ms var(--sf-ease), border-color 180ms var(--sf-ease);
}

.page-about .about-next__item:hover,
.page-about .about-next__item:focus-visible {
  transform: translateY(-2px);
  border-color: var(--sf-lime);
}

.page-about .about-next__idx {
  grid-area: idx;
  font-family: var(--sf-font-mono);
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--sf-orange);
  align-self: start;
  padding-top: 2px;
}

.page-about .about-next__name {
  grid-area: name;
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--sf-fog);
}

.page-about .about-next__desc {
  grid-area: desc;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--sf-silver);
}

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

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

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

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

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

@media (min-width: 860px) {
  .page-about .about-hero__split {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: center;
  }

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

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

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: 216px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: 104px;
  }

  .page-about .about-toc__list {
    display: grid;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-toc__link {
    display: block;
    white-space: normal;
    border: 0;
    border-radius: 6px;
    border-left: 3px solid rgba(201, 210, 208, 0.24);
    padding: 7px 10px;
  }

  .page-about .about-toc__callout {
    display: block;
  }

  .page-about .about-node {
    grid-template-columns: 76px minmax(0, 1fr);
    padding: 16px 18px;
  }

  .page-about .about-workflow {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }

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

  .page-about .about-partners {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }

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

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

@media (min-width: 1180px) {
  .page-about .about-hero__split {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  }

  .page-about .about-chapter__text,
  .page-about .about-honor__lead {
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-next__item,
  .page-about .about-toc__link,
  .page-about .about-team__item .sf-disclosure__icon {
    transition: none;
  }

  .page-about .about-next__item:hover,
  .page-about .about-next__item:focus-visible {
    transform: none;
  }
}