.page-about {
  --about-rail-w: 172px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

.page-about .about-crumb {
  padding: clamp(14px, 3vw, 22px) 0 0;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.page-about .breadcrumb__link {
  color: var(--indigo);
  text-decoration: none;
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--vermilion);
  text-decoration: underline;
}

.page-about .breadcrumb__item[aria-current="page"] {
  color: var(--vermilion-deep);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 40px) 0 clamp(30px, 5vw, 56px);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 52px);
  align-items: start;
}

.page-about .about-hero__copy .eyebrow {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--green);
  border-bottom: 1px solid var(--gold);
  padding-bottom: 6px;
  margin: 0 0 16px;
}

.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(38px, 8vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ink);
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--vermilion);
  position: relative;
  z-index: 0;
}

.page-about .about-hero h1 em::after {
  content: "";
  position: absolute;
  left: -4px;
  right: -4px;
  bottom: 6px;
  height: 12px;
  background: linear-gradient(90deg, var(--gold-light), rgba(240, 211, 138, 0.15));
  z-index: -1;
}

.page-about .about-hero__lead {
  margin: clamp(16px, 3vw, 22px) 0 0;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(20px, 3.5vw, 30px) 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--vermilion);
}

.page-about .about-fact__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3.5vw, 28px);
}

.page-about .about-hero__actions .btn {
  font-size: 14px;
  padding: 11px 20px;
  border-radius: var(--r-sm);
  text-decoration: none;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border-radius: var(--r-lg);
}

.page-about .about-hero__figure::before {
  content: "";
  position: absolute;
  inset: 14px 14px -14px 14px;
  border: 1px solid var(--gold);
  border-radius: var(--r-lg);
  z-index: 0;
}

.page-about .about-hero__figure .media__img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  object-fit: cover;
  box-shadow: var(--shadow-1);
}

.page-about .media__label {
  display: block;
  margin-top: 20px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

/* 长卷结构 */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 36px);
  padding-bottom: clamp(44px, 7vw, 84px);
}

.page-about .about-rail {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 14px;
  overflow-x: auto;
  font-family: var(--font-num);
  font-size: 12px;
}

.page-about .about-rail__link {
  display: inline-flex;
  gap: 6px;
  white-space: nowrap;
  padding: 3px 0;
  color: var(--ink-soft);
  text-decoration: none;
  letter-spacing: 0.08em;
}

.page-about .about-rail__link b {
  color: var(--gold);
  font-weight: 700;
}

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

.page-about .about-sec {
  padding: clamp(28px, 5vw, 46px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-sec__eyebrow {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--indigo);
  font-family: var(--font-num);
}

.page-about .about-sec__eyebrow .index-num {
  color: var(--gold);
  margin-right: 6px;
}

.page-about .about-h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(25px, 4.4vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  max-width: 22ch;
}

.page-about .about-text {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 58ch;
}

/* 价值观 */
.page-about .about-values {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-value {
  background: var(--paper-3);
  padding: 18px 18px 20px;
  transition: background 0.3s var(--ease);
}

.page-about .about-value:hover,
.page-about .about-value:focus-within {
  background: var(--paper-2);
}

.page-about .about-value__idx {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-value__title {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 900;
  margin: 6px 0 6px;
  color: var(--vermilion-deep);
}

.page-about .about-value__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* 阶段筛选 */
.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 18px 0 20px;
}

.page-about .about-filter .chip {
  font-family: var(--font-body);
  font-size: 13px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--paper-3);
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-filter .chip:hover {
  border-color: var(--gold);
  color: var(--ink);
}

.page-about .about-filter .chip[aria-pressed="true"] {
  background: var(--vermilion);
  border-color: var(--vermilion);
  color: var(--paper-3);
}

.page-about .about-filter__status {
  margin: 0 0 0 auto;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

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

.page-about .about-stage {
  position: relative;
  background: var(--paper-3);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--gold);
  border-radius: var(--r-md);
  padding: 18px 18px 20px;
  box-shadow: var(--shadow-1);
}

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

.page-about .about-stage:nth-child(2) {
  border-left-color: var(--vermilion);
}

.page-about .about-stage:nth-child(3) {
  border-left-color: var(--green);
}

.page-about .about-stage__num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-stage__title {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 900;
  margin: 6px 0 8px;
  line-height: 1.35;
}

.page-about .about-stage__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-scale-wrap {
  margin: 26px 0 0;
  padding: 14px 6px 0;
  border-top: 1px dashed var(--line);
}

.page-about .about-scale {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  color: var(--ink);
}

.page-about .about-scale__axis {
  stroke: var(--line);
  stroke-width: 1.5;
}

.page-about .about-scale__tick {
  stroke: var(--gold);
  stroke-width: 2;
}

.page-about .about-scale__dot {
  fill: var(--paper);
  stroke: var(--gold);
  stroke-width: 2;
}

.page-about .about-scale__dot--key {
  fill: var(--vermilion);
  stroke: var(--vermilion-deep);
}

.page-about .about-scale text {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.06em;
  fill: var(--ink-soft);
}

.page-about .about-scale .about-scale__label-key {
  fill: var(--vermilion);
  font-weight: 700;
}

/* 团队 */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 34px);
  margin-top: 22px;
}

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

.page-about .about-team__figure .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--r-md);
  object-fit: cover;
}

.page-about .about-team__figure::after {
  content: "";
  display: block;
  height: 3px;
  width: 46%;
  margin-top: 12px;
  background: linear-gradient(90deg, var(--vermilion), var(--gold));
}

.page-about .about-cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-card {
  position: relative;
  padding: 16px 16px 18px 18px;
  background: var(--paper-3);
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
}

.page-about .about-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: var(--indigo);
  opacity: 0.4;
  transition: background 0.25s var(--ease), opacity 0.25s var(--ease);
}

.page-about .about-card:hover::before {
  background: var(--vermilion);
  opacity: 1;
}

.page-about .about-card__num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--indigo);
}

.page-about .about-card__title {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 900;
  margin: 5px 0 6px;
}

.page-about .about-card__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* 合作生态 */
.page-about .about-net__figure {
  margin: 22px 0 0;
}

.page-about .about-net__figure .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  object-fit: cover;
  background: var(--paper-2);
}

.page-about .about-legend {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px 20px;
}

.page-about .about-node {
  border-left: 2px solid var(--gold);
  padding: 4px 0 6px 12px;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-node:hover,
.page-about .about-node:focus-within {
  border-left-color: var(--vermilion);
  background: linear-gradient(90deg, rgba(217, 164, 65, 0.14), rgba(217, 164, 65, 0));
}

.page-about .about-node__num {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--green);
}

.page-about .about-node__title {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 900;
  margin: 4px 0 5px;
}

.page-about .about-node__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* 服务节奏与联络 */
.page-about .about-service {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 34px);
  margin-top: 22px;
}

.page-about .about-rhythm {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-rhythm__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-rhythm__when {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--vermilion);
}

.page-about .about-rhythm__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-contact {
  position: relative;
  background: var(--felt);
  color: var(--paper);
  border-radius: var(--r-lg);
  padding: 24px 20px 22px;
  overflow: hidden;
}

.page-about .about-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 88% 8%, rgba(217, 164, 65, 0.22), transparent 62%);
  pointer-events: none;
}

.page-about .about-contact__title {
  position: relative;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 900;
  margin: 0 0 10px;
  color: var(--gold-light);
}

.page-about .about-contact__text {
  position: relative;
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(245, 235, 221, 0.82);
}

.page-about .about-contact__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-contact__link {
  color: var(--gold-light);
  font-family: var(--font-num);
  font-size: 14px;
  text-decoration: none;
  word-break: break-all;
  border-bottom: 1px solid rgba(240, 211, 138, 0.4);
}

.page-about .about-contact__link:hover,
.page-about .about-contact__link:focus-visible {
  color: var(--paper-3);
  border-bottom-color: var(--paper-3);
}

.page-about .about-contact__link--phone {
  font-size: 18px;
  letter-spacing: 0.04em;
}

.page-about .about-contact__address {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(245, 235, 221, 0.72);
}

.page-about .about-contact__note {
  position: relative;
  margin: 14px 0 16px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: rgba(245, 235, 221, 0.66);
}

.page-about .about-contact__go {
  position: relative;
  display: inline-block;
  padding: 9px 18px;
  border-radius: var(--r-sm);
  background: var(--vermilion);
  color: var(--paper-3);
  font-size: 14px;
  text-decoration: none;
  transition: background 0.25s var(--ease);
}

.page-about .about-contact__go:hover,
.page-about .about-contact__go:focus-visible {
  background: var(--vermilion-deep);
}

.page-about .about-next {
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.9;
  color: var(--ink-soft);
}

.page-about .about-next a {
  color: var(--indigo);
  text-decoration: none;
  border-bottom: 1px solid rgba(42, 59, 110, 0.35);
}

.page-about .about-next a:hover,
.page-about .about-next a:focus-visible {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

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

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

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

  .page-about .about-rhythm__item {
    grid-template-columns: 88px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
}

@media (min-width: 820px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    align-items: start;
  }

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

  .page-about .about-cards .about-card:nth-child(even) {
    transform: translateY(16px);
  }

  .page-about .about-service {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

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

  .page-about .about-stage {
    max-width: 72ch;
  }

  .page-about .about-stage:nth-child(2) {
    margin-left: clamp(16px, 4vw, 48px);
  }

  .page-about .about-stage:nth-child(3) {
    margin-left: clamp(32px, 8vw, 96px);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: center;
  }

  .page-about .about-hero__figure {
    margin-top: 12px;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 56px);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    border-top: 0;
    border-left: 1px solid var(--line);
    padding: 0 0 0 16px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 16px;
    overflow: visible;
  }

  .page-about .about-h2 {
    max-width: 26ch;
  }

  .page-about .about-sec {
    padding: clamp(36px, 4.6vw, 58px) 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-value,
  .page-about .about-card::before,
  .page-about .about-node,
  .page-about .about-filter .chip,
  .page-about .about-contact__go {
    transition: none;
  }

  .page-about .about-cards .about-card:nth-child(even) {
    transform: none;
  }
}