.page-about {
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about .about-crumbs {
  padding-block: 18px 4px;
  font-size: 13px;
  color: var(--ink-soft);
}

.page-about .about-section {
  padding-block: clamp(44px, 7vw, 86px);
}

/* ---------- 首屏品牌条 ---------- */
.page-about .about-masthead {
  position: relative;
  overflow: hidden;
  padding-block: clamp(34px, 7vw, 74px) clamp(38px, 7vw, 78px);
  color: var(--paper);
  border-bottom: 3px solid var(--gold);
  background:
    radial-gradient(120% 150% at 86% 6%, rgba(214, 167, 86, 0.24), transparent 58%),
    linear-gradient(104deg, var(--walnut) 0%, var(--walnut-deep) 58%, var(--walnut-ink) 100%);
}

.page-about .about-masthead::before {
  content: "";
  position: absolute;
  inset-inline-end: -110px;
  inset-block-start: -130px;
  width: 320px;
  height: 320px;
  border: 2px solid rgba(214, 167, 86, 0.32);
  transform: rotate(45deg);
  pointer-events: none;
}

.page-about .about-masthead::after {
  content: "";
  position: absolute;
  inset-inline-start: 42%;
  inset-block-end: -60px;
  width: 2px;
  height: 220px;
  background: linear-gradient(180deg, rgba(169, 195, 214, 0.5), transparent);
  transform: rotate(28deg);
  pointer-events: none;
}

.page-about .about-masthead__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: end;
}

.page-about .about-kicker {
  margin: 0 0 18px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-soft);
}

.page-about .about-kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--gold);
}

.page-about .about-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 9.4vw, 52px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-lede {
  margin: 20px 0 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(247, 243, 236, 0.82);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid rgba(247, 243, 236, 0.24);
  padding-top: 18px;
}

.page-about .about-fact {
  min-width: 0;
  padding-inline-start: 14px;
  border-inline-start: 1px solid rgba(247, 243, 236, 0.2);
}

.page-about .about-fact:first-child {
  padding-inline-start: 0;
  border-inline-start: 0;
}

.page-about .about-fact__num {
  display: block;
  font-size: clamp(26px, 6vw, 34px);
  line-height: 1;
  color: var(--gold);
  letter-spacing: -0.01em;
}

.page-about .about-fact__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(247, 243, 236, 0.72);
}

/* ---------- 通用章节元素 ---------- */
.page-about .about-label {
  margin: 0 0 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .about-label::before {
  content: "";
  width: 22px;
  height: 2px;
  background: currentColor;
}

.page-about .about-label--light {
  color: var(--gold-soft);
}

.page-about .about-h2 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 5.8vw, 34px);
  line-height: 1.24;
  letter-spacing: 0.01em;
  color: var(--walnut-ink);
}

.page-about .about-h2--light {
  color: var(--paper);
}

.page-about .about-body {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-body--wide {
  max-width: 62ch;
}

/* ---------- 品牌剖面 ---------- */
.page-about .about-profile__grid {
  display: grid;
  gap: clamp(28px, 5vw, 54px);
  align-items: start;
}

.page-about .about-audience {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-audience li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  background: var(--paper-2);
  border-inline-start: 3px solid var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .about-audience__idx {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
  padding-top: 4px;
}

.page-about .about-audience__body h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--walnut-ink);
}

.page-about .about-audience__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-profile__media {
  margin: 0;
  position: relative;
}

.page-about .about-profile__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
  background: var(--walnut);
}

.page-about .about-profile__media figcaption {
  margin-top: 14px;
  padding-inline-start: 14px;
  border-inline-start: 2px solid var(--snow);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 时间轴 ---------- */
.page-about .about-ridge {
  margin: clamp(26px, 4vw, 42px) 0 0;
  position: relative;
}

.page-about .about-ridge::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  inset-block-end: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--gold), var(--amber) 42%, var(--tianshan) 100%);
}

.page-about .about-ridge img {
  display: block;
  width: 100%;
  height: clamp(116px, 24vw, 240px);
  object-fit: cover;
  background: var(--tianshan-deep);
}

.page-about .about-journey .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .about-journey .filter-status {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.page-about .about-timeline {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  inset-inline-start: 15px;
  inset-block: 8px 22px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(214, 167, 86, 0.12));
}

.page-about .about-stage {
  position: relative;
  padding-inline-start: 48px;
  padding-block-end: 30px;
}

.page-about .about-stage:last-child {
  padding-block-end: 0;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  inset-inline-start: 6px;
  inset-block-start: 6px;
  width: 16px;
  height: 16px;
  background: var(--gold);
  border: 2px solid var(--paper);
  box-sizing: content-box;
  transform: rotate(45deg);
}

.page-about .about-stage.is-off {
  display: none;
}

.page-about .about-stage__num {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-stage__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  line-height: 1.32;
  color: var(--walnut-ink);
}

.page-about .about-stage__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink-soft);
}

/* ---------- 工具卡 ---------- */
.page-about .about-tools-section {
  background: var(--paper-2);
}

.page-about .about-tools {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.page-about .about-tool {
  min-width: 0;
  position: relative;
  padding: 26px 22px 24px;
  background: var(--paper);
  border-top: 3px solid var(--walnut);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-tool--check {
  border-top-color: var(--tianshan);
}

.page-about .about-tool--rank {
  border-top-color: var(--gold);
}

.page-about .about-tool__idx {
  display: block;
  margin-bottom: 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
}

.page-about .about-tool h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.34;
  color: var(--walnut-ink);
}

.page-about .about-tool p {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-tool__link {
  display: inline-block;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--tianshan);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.page-about .about-tool__link:hover,
.page-about .about-tool__link:focus-visible {
  color: var(--amber);
}

/* ---------- 归档 ---------- */
.page-about .about-archive {
  background: var(--paper);
}

.page-about .about-archive__head {
  display: grid;
  gap: 18px;
}

.page-about .about-archive__intro {
  max-width: 60ch;
}

.page-about .about-archive-grid {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.page-about .about-box {
  min-width: 0;
  padding: 20px 20px 18px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-inline-start: 6px solid var(--snow);
}

.page-about .about-box--snow {
  border-inline-start-color: var(--tianshan);
}

.page-about .about-box--gold {
  border-inline-start-color: var(--gold);
}

.page-about .about-box__tab {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 9px;
  background: var(--gold-soft);
  color: var(--walnut-ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
}

.page-about .about-box h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--walnut-ink);
}

.page-about .about-box p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-box__meta {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.page-about .about-archive__note {
  margin: 24px 0 0;
  padding: 16px 18px;
  background: var(--snow);
  color: var(--walnut-ink);
  font-size: 14px;
  line-height: 1.78;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

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

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

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

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--walnut);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}

.page-about .about-team__media figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-team-list {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.page-about .about-team-card {
  background: var(--paper-2);
  border-inline-start: 3px solid var(--walnut);
}

.page-about .about-team-card[open] {
  border-inline-start-color: var(--gold);
}

.page-about .about-team-card summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-team-card__num {
  grid-row: span 2;
  font-size: 24px;
  line-height: 1;
  color: var(--walnut);
}

.page-about .about-team-card__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--walnut-ink);
}

.page-about .about-team-card__role {
  grid-column: 2;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.page-about .about-team-card p {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-team__reach {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 场景与联系 ---------- */
.page-about .about-scenes-section {
  padding-block: 0;
  background: var(--paper);
}

.page-about .about-scenes {
  padding-block: clamp(44px, 7vw, 82px);
  color: var(--paper);
  background:
    linear-gradient(150deg, var(--tianshan) 0%, var(--tianshan-deep) 68%, var(--walnut-ink) 100%);
}

.page-about .about-scene-grid {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.page-about .about-scene {
  min-width: 0;
  padding: 22px 20px;
  background: rgba(247, 243, 236, 0.08);
  border: 1px solid rgba(247, 243, 236, 0.18);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .about-scene h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  color: var(--gold-soft);
}

.page-about .about-scene p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(247, 243, 236, 0.84);
}

.page-about .about-scene a {
  display: inline-block;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 2px;
}

.page-about .about-scene a:hover,
.page-about .about-scene a:focus-visible {
  color: var(--gold-soft);
}

.page-about .about-cta {
  display: grid;
  gap: 24px;
  margin-block: clamp(34px, 6vw, 64px);
  padding: clamp(26px, 4vw, 40px);
  background: var(--walnut);
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-cta__text h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 5vw, 30px);
  line-height: 1.28;
  color: var(--gold-soft);
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 243, 236, 0.84);
}

.page-about .about-email {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: 18px !important;
  padding-top: 16px;
  border-top: 1px solid rgba(247, 243, 236, 0.22);
  font-size: 14px;
  color: var(--paper);
  word-break: break-all;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

@media (min-width: 700px) {
  .page-about .about-tools {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-masthead__inner {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 0.75fr);
    gap: clamp(36px, 5vw, 64px);
  }

  .page-about .about-title {
    font-size: clamp(52px, 6vw, 84px);
  }

  .page-about .about-lede {
    font-size: 17px;
  }

  .page-about .about-profile__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: clamp(36px, 5vw, 60px);
  }

  .page-about .about-profile__media {
    margin-top: 24px;
  }

  .page-about .about-archive__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(24px, 4vw, 48px);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(30px, 4vw, 52px);
  }

  .page-about .about-team__media {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.7fr);
    align-items: end;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
    animation: none !important;
  }
}