.page-about {
  background: var(--w-bg);
  color: var(--w-text);
  font-family: var(--w-font-sans);
  overflow-x: hidden;
}

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

/* ===== 标题区 ===== */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 32px;
  background:
    linear-gradient(135deg, rgba(255, 77, 46, 0.08) 0%, transparent 32%),
    linear-gradient(180deg, var(--w-bg-deep) 0%, var(--w-bg) 100%);
  border-bottom: 1px solid var(--w-line-soft);
  background-clip: padding-box;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--w-accent) 0%, rgba(255, 77, 46, 0.35) 40%, transparent 80%);
  pointer-events: none;
}

.page-about .about-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--w-text-dim);
  margin-bottom: 24px;
}

.page-about .about-breadcrumb a {
  color: var(--w-text-dim);
  text-decoration: none;
  transition: color var(--w-transition);
}

.page-about .about-breadcrumb a:hover {
  color: var(--w-accent-light);
}

.page-about .about-breadcrumb__sep {
  color: var(--w-line);
}

.page-about .about-hero .page-headline {
  max-width: 680px;
}

.page-about .page-headline__index {
  display: block;
  font-size: 56px;
  font-weight: 800;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--w-accent);
  margin-bottom: 14px;
}

.page-about .page-headline h1 {
  font-size: 38px;
  line-height: 1.15;
  margin: 0 0 14px;
  letter-spacing: -0.01em;
}

.page-about .page-headline__summary {
  font-size: 16px;
  line-height: 1.7;
  color: var(--w-text-dim);
  max-width: 480px;
  margin: 0;
}

.page-about .about-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.page-about .about-toc a {
  font-size: 13px;
  font-weight: 700;
  color: var(--w-text-dim);
  text-decoration: none;
  border: 1px solid var(--w-line-soft);
  border-radius: 999px;
  padding: 7px 14px;
  transition: color var(--w-transition), border-color var(--w-transition), background-color var(--w-transition);
}

.page-about .about-toc a:hover {
  color: var(--w-accent-light);
  border-color: var(--w-accent);
  background: var(--w-accent-soft);
}

/* ===== 品牌简介 ===== */
.page-about .about-intro {
  padding: 56px 0;
}

.page-about .about-intro__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

.page-about .about-intro__content .eyebrow,
.page-about .about-section-head .eyebrow,
.page-about .about-tech__main .eyebrow,
.page-about .about-yunnan__content .eyebrow,
.page-about .about-team__head .eyebrow {
  margin-bottom: 12px;
  display: block;
}

.page-about .about-intro__content h2,
.page-about .about-section-head h2,
.page-about .about-tech__main h2,
.page-about .about-yunnan__content h2,
.page-about .about-team__head h2 {
  font-size: 28px;
  line-height: 1.25;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}

.page-about .about-intro__content p,
.page-about .about-tech__main > p,
.page-about .about-yunnan__content p,
.page-about .about-section-head > p {
  color: var(--w-text-dim);
  line-height: 1.8;
  margin: 0 0 16px;
  font-size: 15px;
}

.page-about .about-intro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-intro__figure {
  margin: 0;
  border-radius: var(--w-radius);
  overflow: hidden;
  box-shadow: var(--w-shadow);
}

/* ===== 发展里程碑 ===== */
.page-about .about-timeline {
  background: var(--w-bg-deep);
  padding: 56px 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 77, 46, 0.04) 0%, transparent 40%, rgba(255, 77, 46, 0.05) 100%);
  pointer-events: none;
}

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

.page-about .about-section-head {
  margin-bottom: 36px;
}

.page-about .about-timeline__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

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

.page-about .about-timeline__item {
  position: relative;
  padding-left: 52px;
  padding-bottom: 36px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 30px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--w-accent) 0%, rgba(255, 122, 69, 0.35) 45%, var(--w-line-soft) 100%);
}

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

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

.page-about .about-timeline__node {
  position: absolute;
  left: 0;
  top: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--w-panel-2);
  border: 2px solid var(--w-accent);
  color: var(--w-accent-light);
  font-size: 12px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 5px rgba(255, 77, 46, 0.12);
  z-index: 2;
}

.page-about .about-timeline__card {
  background: var(--w-panel);
  border: 1px solid var(--w-line-soft);
  border-radius: var(--w-radius);
  padding: 20px;
  box-shadow: var(--w-shadow-soft);
  transition: transform var(--w-transition), border-color var(--w-transition), background-color var(--w-transition);
}

.page-about .about-timeline__card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 77, 46, 0.5);
  background: linear-gradient(135deg, var(--w-panel) 0%, var(--w-panel-2) 100%);
}

.page-about .about-timeline__phase {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--w-accent-light);
  background: var(--w-accent-soft);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.page-about .about-timeline__card h3 {
  font-size: 19px;
  line-height: 1.3;
  margin: 0 0 8px;
}

.page-about .about-timeline__card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--w-text-dim);
  margin: 0;
}

.page-about .about-timeline__figure {
  margin: 0;
  border-radius: var(--w-radius);
  overflow: hidden;
  border: 1px solid var(--w-line-soft);
  box-shadow: var(--w-shadow);
}

/* ===== 技术实力 ===== */
.page-about .about-tech {
  padding: 56px 0;
}

.page-about .about-tech__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-tech__main > p {
  max-width: 560px;
}

.page-about .about-tech__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 24px 0 20px;
}

.page-about .about-tech__stats .data-card {
  background: var(--w-panel);
  border: 1px solid var(--w-line-soft);
  border-radius: var(--w-radius-sm);
  padding: 18px 14px;
  text-align: center;
}

.page-about .about-tech__stats .data-card:last-child {
  grid-column: span 2;
}

.page-about .about-tech__stats .data-card__label {
  display: block;
  font-size: 13px;
  color: var(--w-text-dim);
  margin-bottom: 8px;
}

.page-about .about-tech__stats .data-card__value {
  display: block;
  font-size: 26px;
  font-weight: 800;
  color: var(--w-accent-light);
  line-height: 1.1;
}

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

.page-about .about-tech__list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--w-text);
}

.page-about .about-tech__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--w-accent);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
}

.page-about .about-tech__figure {
  margin: 0;
  border-radius: var(--w-radius);
  overflow: hidden;
  border: 1px solid var(--w-line-soft);
  box-shadow: var(--w-shadow);
}

/* ===== 云南基因 ===== */
.page-about .about-yunnan {
  background:
    radial-gradient(ellipse at 18% 82%, rgba(255, 77, 46, 0.12) 0%, transparent 52%),
    var(--w-bg);
  padding: 56px 0;
}

.page-about .about-yunnan__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-yunnan__map {
  position: relative;
  text-align: center;
  padding: 24px 20px;
  background: var(--w-panel);
  border: 1px solid var(--w-line-soft);
  border-radius: var(--w-radius);
  box-shadow: var(--w-shadow-soft);
}

.page-about .about-yunnan__svg {
  width: 100%;
  max-width: 340px;
  margin: 0 auto;
  display: block;
}

.page-about .about-yunnan__outline {
  fill: none;
  stroke: var(--w-accent);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.page-about .about-yunnan__inner {
  fill: none;
  stroke: var(--w-line-soft);
  stroke-width: 1;
  stroke-dasharray: 4 4;
  stroke-linejoin: round;
}

.page-about .about-yunnan__marker {
  fill: var(--w-accent);
  stroke: var(--w-white);
  stroke-width: 2;
  transition: fill var(--w-transition), stroke-width var(--w-transition);
}

.page-about .about-yunnan__marker:hover {
  fill: var(--w-accent-light);
  stroke-width: 3;
}

.page-about .about-yunnan__label {
  fill: var(--w-text);
  font-size: 14px;
  font-weight: 700;
  font-family: var(--w-font-sans);
}

.page-about .about-yunnan__badge {
  display: inline-block;
  margin-top: 18px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--w-accent-light);
  background: var(--w-accent-soft);
  padding: 6px 16px;
  border-radius: 999px;
}

.page-about .about-yunnan__content {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* ===== 团队与规模 ===== */
.page-about .about-team {
  background: var(--w-bg-deep);
  padding: 56px 0;
}

.page-about .about-team__head {
  margin-bottom: 28px;
}

.page-about .about-team__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-about .about-team__stat {
  background: var(--w-panel);
  border: 1px solid var(--w-line-soft);
  border-radius: var(--w-radius);
  padding: 20px 12px;
  text-align: center;
  transition: border-color var(--w-transition), transform var(--w-transition);
}

.page-about .about-team__stat:hover {
  border-color: rgba(255, 77, 46, 0.5);
  transform: translateY(-3px);
}

.page-about .about-team__stat:last-child {
  grid-column: span 2;
}

.page-about .about-team__stat .display-number {
  display: block;
  font-size: 28px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--w-white);
  margin-bottom: 8px;
}

.page-about .about-team__stat-label {
  font-size: 13px;
  color: var(--w-text-dim);
}

.page-about .about-team__roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-team__role {
  position: relative;
  background: var(--w-panel);
  border: 1px solid var(--w-line-soft);
  border-radius: var(--w-radius);
  padding: 20px 20px 20px 68px;
  transition: border-color var(--w-transition), transform var(--w-transition), background-color var(--w-transition);
}

.page-about .about-team__role:hover {
  border-color: var(--w-accent);
  transform: translateX(4px);
  background: linear-gradient(135deg, var(--w-panel) 0%, var(--w-panel-2) 100%);
}

.page-about .about-team__role-index {
  position: absolute;
  left: 20px;
  top: 20px;
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--w-accent-light);
}

.page-about .about-team__role h3 {
  font-size: 17px;
  margin: 0 0 6px;
}

.page-about .about-team__role p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--w-text-dim);
  margin: 0;
}

.page-about .about-team__chart-wrap {
  margin-top: 28px;
  padding: 20px;
  background: var(--w-panel-2);
  border: 1px solid var(--w-line-soft);
  border-radius: var(--w-radius);
}

.page-about .about-team__chart {
  width: 100%;
  display: block;
}

.page-about .about-team__chart-grid {
  stroke: var(--w-line-soft);
  stroke-width: 1;
  stroke-dasharray: 4 6;
}

.page-about .about-team__chart-line {
  fill: none;
  stroke: var(--w-accent);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.page-about .about-team__chart-dot {
  fill: var(--w-accent-light);
  stroke: var(--w-white);
  stroke-width: 2;
}

.page-about .about-team__chart-label {
  fill: var(--w-text-dim);
  font-size: 12px;
  font-family: var(--w-font-sans);
}

/* ===== 关联页面 ===== */
.page-about .about-links {
  padding: 48px 0;
}

.page-about .about-links__head {
  margin-bottom: 24px;
}

.page-about .about-links__head h2 {
  font-size: 24px;
  margin: 0;
}

.page-about .about-links__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-links__card {
  display: block;
  position: relative;
  background: var(--w-panel);
  border: 1px solid var(--w-line-soft);
  border-radius: var(--w-radius);
  padding: 20px;
  text-decoration: none;
  color: var(--w-text);
  transition: border-color var(--w-transition), transform var(--w-transition), background-color var(--w-transition);
}

.page-about .about-links__card:hover {
  border-color: var(--w-accent);
  transform: translateY(-3px);
  background: linear-gradient(135deg, var(--w-panel) 0%, var(--w-panel-2) 100%);
}

.page-about .about-links__card h3 {
  font-size: 17px;
  margin: 0 0 6px;
  color: var(--w-white);
}

.page-about .about-links__card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--w-text-dim);
  margin: 0;
  padding-right: 28px;
}

.page-about .about-links__arrow {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--w-accent);
}

/* ===== 桌面端 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 56px 0 44px;
  }

  .page-about .page-headline__index {
    font-size: 68px;
    margin-bottom: 18px;
  }

  .page-about .page-headline h1 {
    font-size: 48px;
  }

  .page-about .about-intro {
    padding: 80px 0;
  }

  .page-about .about-intro__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
  }

  .page-about .about-intro__content h2,
  .page-about .about-section-head h2,
  .page-about .about-tech__main h2,
  .page-about .about-yunnan__content h2,
  .page-about .about-team__head h2 {
    font-size: 36px;
  }

  .page-about .about-intro__content p,
  .page-about .about-tech__main > p,
  .page-about .about-yunnan__content p,
  .page-about .about-section-head > p {
    font-size: 16px;
  }

  .page-about .about-timeline {
    padding: 80px 0;
  }

  .page-about .about-timeline__layout {
    grid-template-columns: 1fr 340px;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-timeline__figure {
    position: sticky;
    top: calc(var(--w-header-h) + 24px);
  }

  .page-about .about-tech {
    padding: 80px 0;
  }

  .page-about .about-tech__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
  }

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

  .page-about .about-tech__stats .data-card:last-child {
    grid-column: auto;
  }

  .page-about .about-yunnan {
    padding: 80px 0;
  }

  .page-about .about-yunnan__grid {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-yunnan__map {
    padding: 32px;
  }

  .page-about .about-team {
    padding: 80px 0;
  }

  .page-about .about-team__layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 32px;
    align-items: start;
  }

  .page-about .about-team__stats {
    grid-template-columns: 1fr;
  }

  .page-about .about-team__stat:last-child {
    grid-column: auto;
  }

  .page-about .about-team__stat {
    padding: 24px 20px;
  }

  .page-about .about-team__stat .display-number {
    font-size: 38px;
  }
}

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

  .page-about .about-timeline__layout {
    grid-template-columns: 1fr 380px;
  }
}