/* ===== 品牌档案 / 页面专属样式 ===== */

.page-about {
  --about-gap: clamp(20px, 4vw, 44px);
  --about-rule: 3px solid var(--ink);
  --about-edge: clamp(18px, 4vw, 48px);
  background: var(--paper);
  color: var(--ink);
}

.page-about .container {
  max-width: var(--content);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

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

/* 面包屑 */
.page-about .breadcrumbs {
  padding: clamp(14px, 3vw, 24px) 0 0;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sea);
}

.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: var(--ochre);
}

.page-about .breadcrumb-link {
  color: var(--sea);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  border-bottom-color: var(--ochre);
}

/* ---------- 首屏 ---------- */
.about-hero {
  padding: clamp(20px, 4vw, 46px) 0 clamp(30px, 5vw, 58px);
  border-bottom: var(--about-rule);
}

.about-hero__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}

.about-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sea);
}

.about-tag__no {
  display: inline-block;
  padding: 5px 10px;
  background: var(--ochre);
  color: var(--cream);
  border: 2px solid var(--ink);
  letter-spacing: 0.14em;
}

.about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 3.9rem);
  line-height: 1.08;
  letter-spacing: 0.015em;
  color: var(--sea-deep);
  overflow-wrap: break-word;
}

.about-hero__lede {
  margin: 0 0 26px;
  max-width: 46ch;
  font-size: clamp(0.98rem, 2.2vw, 1.1rem);
  line-height: 1.85;
  color: var(--ink);
}

.about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.about-hero__visual {
  background: var(--sea);
  border: 4px solid var(--ink);
  box-shadow: var(--shadow-hard);
  padding: clamp(18px, 4vw, 34px);
  display: grid;
  place-items: center;
}

.about-hero__visual svg {
  display: block;
  width: 100%;
  max-width: 360px;
  height: auto;
}

/* 关键数字条 */
.about-facts {
  display: grid;
  gap: 0;
  margin-top: clamp(26px, 4vw, 44px);
  padding: 0;
  border: var(--about-rule);
  background: var(--cream);
}

.about-fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 16px clamp(14px, 3vw, 24px);
  border-bottom: 2px solid var(--ink);
}

.about-fact:last-child {
  border-bottom: 0;
}

.about-fact dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sea);
}

.about-fact dd {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink);
}

.about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3.4vw, 1.75rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ochre);
}

/* ---------- 通用章节头 ---------- */
.page-about .page-section {
  padding: clamp(38px, 7vw, 84px) 0;
}

.about-section-head {
  max-width: 62ch;
  margin-bottom: var(--about-gap);
}

.about-section-head .section-title {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.2vw, 2.5rem);
  line-height: 1.18;
  letter-spacing: 0.02em;
  color: var(--sea-deep);
}

.about-section-head .lede {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink);
}

.about-chapter {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 7vw, 3.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--ochre);
}

.about-chapter__label {
  display: inline-block;
  margin-top: 8px;
  padding: 3px 10px;
  background: var(--sand);
  border: 2px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
}

/* ---------- 缘起 ---------- */
.about-origin {
  border-bottom: var(--about-rule);
}

.about-origin__grid {
  display: grid;
  gap: var(--about-gap);
}

.about-origin__body .section-title {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.2vw, 2.5rem);
  line-height: 1.18;
  letter-spacing: 0.02em;
  color: var(--sea-deep);
}

.about-origin__figure {
  margin: 0 0 24px;
  border: 4px solid var(--ink);
  box-shadow: var(--shadow-hard);
  background: var(--cream);
  overflow: hidden;
}

.page-about .media-caption {
  padding: 12px 16px;
  border-top: 3px solid var(--ink);
  background: var(--sand);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.about-origin__body p {
  margin: 0 0 18px;
  line-height: 1.88;
  font-size: 1rem;
}

.about-origin__note {
  margin-top: 26px;
  border-left: 6px solid var(--ochre);
}

.about-origin__note p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 方法（标签页） ---------- */
.about-method__layout {
  display: grid;
  gap: var(--about-gap);
}

.about-method__tabs {
  border: var(--about-rule);
  background: var(--cream);
  box-shadow: var(--shadow-hard);
}

.about-method__tabs .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: var(--about-rule);
  background: var(--paper-deep);
}

.about-method__tabs .tab-button {
  appearance: none;
  flex: 1 1 auto;
  min-width: 0;
  padding: 14px 12px;
  border: 0;
  border-right: 2px solid var(--ink);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--sea);
  cursor: pointer;
  text-align: center;
  transition: background 160ms ease, color 160ms ease;
}

.about-method__tabs .tab-button:last-child {
  border-right: 0;
}

.about-method__tabs .tab-button:hover {
  background: var(--sand);
  color: var(--ink);
}

.about-method__tabs .tab-button[aria-selected="true"] {
  background: var(--sea);
  color: var(--cream);
  box-shadow: inset 0 -5px 0 var(--orange);
}

.about-method__tabs .tab-button:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: -3px;
}

.about-method__tabs .tab-panel {
  padding: clamp(20px, 4vw, 32px);
}

.about-method__tabs .tab-panel h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.1rem, 2.8vw, 1.35rem);
  letter-spacing: 0.02em;
  color: var(--ochre);
}

.about-method__tabs .tab-panel p {
  margin: 0 0 14px;
  font-size: 0.98rem;
  line-height: 1.85;
}

.about-method__tabs .tab-panel p:last-child {
  margin-bottom: 0;
}

.about-method__visual {
  margin: 0;
  border: 4px solid var(--ink);
  background: var(--cream);
  overflow: hidden;
}

/* ---------- 服务对象 ---------- */
.about-audience {
  border-top: var(--about-rule);
  border-bottom: var(--about-rule);
  background:
    linear-gradient(180deg, var(--paper) 0%, var(--paper-deep) 100%);
}

.about-audience__index {
  list-style: none;
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
}

.about-audience__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 3.4vw, 26px);
  background: var(--cream);
  border: 3px solid var(--ink);
  box-shadow: var(--shadow-hard);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.about-audience__card:hover,
.about-audience__card:focus-within {
  transform: translate(-3px, -3px);
  box-shadow: 10px 10px 0 rgba(43, 33, 28, 0.24);
}

.about-audience__card:nth-child(1) {
  background: var(--sea);
  color: var(--cream);
}

.about-audience__card:nth-child(1) h3 {
  color: var(--cream);
}

.about-audience__card:nth-child(1) p {
  color: var(--mist);
}

.about-audience__card:nth-child(1) .about-audience__no {
  background: var(--orange);
  color: var(--ink);
}

.about-audience__card:nth-child(4) {
  background: var(--sand);
}

.about-audience__no {
  align-self: flex-start;
  padding: 3px 9px;
  background: var(--ochre);
  color: var(--cream);
  border: 2px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
}

.about-audience__card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.6vw, 1.22rem);
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--sea-deep);
}

.about-audience__card p {
  margin: 0;
  flex: 1 1 auto;
  font-size: 0.94rem;
  line-height: 1.8;
}

.about-audience__link {
  align-self: flex-start;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--ochre);
  text-decoration: none;
  border-bottom: 2px solid currentColor;
  padding-bottom: 2px;
}

.about-audience__card:nth-child(1) .about-audience__link {
  color: var(--orange);
}

.about-audience__link:hover,
.about-audience__link:focus-visible {
  color: var(--sea);
}

.about-audience__card:nth-child(1) .about-audience__link:hover,
.about-audience__card:nth-child(1) .about-audience__link:focus-visible {
  color: var(--cream);
}

/* ---------- 历程时间线 ---------- */
.about-timeline__grid {
  display: grid;
  gap: var(--about-gap);
}

.about-timeline__head .section-title {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.2vw, 2.5rem);
  line-height: 1.18;
  letter-spacing: 0.02em;
  color: var(--sea-deep);
}

.about-timeline__head p {
  margin: 0 0 24px;
  font-size: 1rem;
  line-height: 1.85;
}

.about-timeline__figure {
  margin: 0;
  border: 4px solid var(--ink);
  box-shadow: var(--shadow-hard);
  background: var(--cream);
  overflow: hidden;
}

.about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 5px solid var(--ink);
  display: grid;
  gap: 24px;
}

.about-timeline__item {
  position: relative;
  padding: 16px 18px;
  background: var(--cream);
  border: 3px solid var(--ink);
  transition: background 180ms ease, box-shadow 180ms ease;
}

.about-timeline__item::before {
  content: "";
  position: absolute;
  left: -40px;
  top: 18px;
  width: 16px;
  height: 16px;
  box-sizing: content-box;
  background: var(--paper);
  border: 4px solid var(--ochre);
  border-radius: 50%;
}

.about-timeline__item:hover,
.about-timeline__item:focus-within {
  background: var(--sand);
  box-shadow: var(--shadow-hard);
}

.about-timeline__item:hover::before,
.about-timeline__item:focus-within::before {
  background: var(--orange);
}

.about-timeline__year {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--ochre);
}

.about-timeline__body h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.08rem;
  letter-spacing: 0.02em;
  color: var(--sea-deep);
}

.about-timeline__body p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
}

/* ---------- 团队 ---------- */
.about-team {
  border-top: var(--about-rule);
  background: var(--paper-deep);
}

.about-team__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.about-team__body .section-title {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.2vw, 2.5rem);
  line-height: 1.18;
  letter-spacing: 0.02em;
  color: var(--sea-deep);
}

.about-team__body p {
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.88;
}

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

.about-team__panel {
  display: grid;
  gap: 0;
  border: var(--about-rule);
  background: var(--cream);
  box-shadow: var(--shadow-hard);
}

.about-team__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px clamp(16px, 3vw, 24px);
  border-bottom: 2px solid var(--ink);
}

.about-team__stat:last-child {
  border-bottom: 0;
}

.about-team__stat:nth-child(2) {
  background: var(--sand);
}

.about-team__statnum {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4.6vw, 2.1rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ochre);
}

.about-team__statlabel {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--sea);
}

/* ---------- 更新节奏 ---------- */
.about-cadence__list {
  display: grid;
  gap: 0;
  border-top: 4px solid var(--ink);
}

.about-cadence__row {
  display: grid;
  gap: 10px;
  padding: clamp(18px, 3.4vw, 26px) 0;
  border-bottom: 2px solid var(--line);
}

.about-cadence__mark {
  justify-self: start;
  padding: 4px 12px;
  background: var(--sea);
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
}

.about-cadence__text h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  color: var(--sea-deep);
}

.about-cadence__text p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.85;
  max-width: 60ch;
}

/* ---------- 结尾行动 ---------- */
.about-cta {
  background: var(--sea);
  border-top: 4px solid var(--ink);
  padding: clamp(36px, 6vw, 72px) 0;
}

.about-cta__inner {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}

.about-cta__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 4vw, 2.1rem);
  line-height: 1.24;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.about-cta__copy p {
  margin: 0;
  max-width: 56ch;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--mist);
}

.about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.about-cta .button--outline {
  border-color: var(--cream);
  color: var(--cream);
}

.about-cta .button--outline:hover,
.about-cta .button--outline:focus-visible {
  background: var(--cream);
  color: var(--sea);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .about-fact {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    border-bottom: 0;
    border-left: 2px solid var(--ink);
  }

  .about-fact:first-child {
    border-left: 0;
  }

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

  .about-audience__card:nth-child(1) {
    grid-column: span 2;
  }

  .about-cadence__row {
    grid-template-columns: 130px minmax(0, 1fr);
    gap: clamp(18px, 3vw, 34px);
    align-items: start;
  }

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

@media (min-width: 900px) {
  .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(30px, 5vw, 64px);
  }

  .about-origin__grid {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
  }

  .about-origin__aside {
    position: sticky;
    top: 110px;
  }

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

  .about-method__visual {
    margin-top: 38px;
  }

  .about-audience__index {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 20px;
  }

  .about-audience__card:nth-child(1) {
    grid-column: span 4;
  }

  .about-audience__card:nth-child(2),
  .about-audience__card:nth-child(3),
  .about-audience__card:nth-child(4),
  .about-audience__card:nth-child(5) {
    grid-column: span 2;
  }

  .about-timeline__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .about-timeline__head {
    position: sticky;
    top: 110px;
  }

  .about-team__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: clamp(28px, 5vw, 60px);
  }
}

@media (min-width: 1180px) {
  .about-origin__grid {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(34px, 5vw, 70px);
  }

  .about-timeline__grid {
    gap: clamp(34px, 5vw, 70px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .about-audience__card,
  .about-timeline__item,
  .about-method__tabs .tab-button {
    transition: none;
  }

  .about-audience__card:hover,
  .about-audience__card:focus-within {
    transform: none;
  }
}
<<<END>>>