.page-about {
  --about-indent: 148px;
  padding-bottom: 64px;
}

.page-about .about-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--red) 0%, var(--amber) 62%, var(--teal) 100%);
  transform: scaleX(var(--sp, 0));
  transform-origin: 0 50%;
  z-index: 90;
  pointer-events: none;
}

/* ---------- 面包屑与首屏 ---------- */

.page-about .about-crumb {
  margin-top: 20px;
}

.page-about .about-hero {
  padding: 18px 0 4px;
}

.page-about .about-hero__h1 {
  margin: 10px 0 0;
  letter-spacing: -0.025em;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.62;
  color: var(--ink);
}

.page-about .about-stats {
  margin: 28px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stats__item {
  background: var(--panel-2);
  padding: 13px 14px 15px;
  min-width: 0;
}

.page-about .about-stats dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
}

.page-about .about-stats dd {
  margin: 7px 0 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--white);
}

/* ---------- 主题带 ---------- */

.page-about .about-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding: 34px 0 12px;
  border-top: 1px solid var(--line);
}

.page-about .about-band__index {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-band__num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--red);
  font-variant-numeric: tabular-nums;
  transition: color var(--ease);
}

.page-about .about-band__stage {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
}

.page-about .about-band__body {
  max-width: 760px;
  min-width: 0;
}

.page-about .about-band__title {
  font-size: 21px;
  line-height: 1.32;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-band__text {
  margin-top: 12px;
  font-size: 16px;
  line-height: 1.62;
  color: var(--ink);
}

.page-about .about-band__text a {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .about-band__foot {
  margin-top: 16px;
  padding-top: 11px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ink-dim);
  transition: color var(--ease), border-color var(--ease);
}

@media (hover: hover) and (pointer: fine) {
  .page-about .about-band:hover .about-band__num {
    color: var(--amber);
  }
  .page-about .about-band:hover .about-band__foot {
    color: var(--teal);
    border-top-color: var(--teal);
  }
}

/* ---------- 图片容器 ---------- */

.page-about .about-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel-2);
  overflow: hidden;
}

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

.page-about .about-media figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.5;
  color: var(--ink-dim);
}

.page-about .about-offset {
  margin: 6px 0 36px;
}

/* ---------- 流程图 ---------- */

.page-about .about-flowscroll {
  margin: 18px 0 0;
  padding-bottom: 8px;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-flow {
  display: block;
  width: 100%;
  min-width: 620px;
  height: auto;
}

.page-about .about-flow__node rect {
  fill: var(--panel-2);
  stroke: var(--line);
  stroke-width: 1;
}

.page-about .about-flow__num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  fill: var(--amber);
}

.page-about .about-flow__name {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  fill: var(--ink);
}

.page-about .about-flow__meta {
  font-family: var(--font-sans);
  font-size: 12px;
  fill: var(--ink-dim);
}

.page-about .about-flow__link {
  stroke: var(--line);
  stroke-width: 1.5;
  fill: none;
}

.page-about .about-flow__tip {
  fill: var(--teal);
}

/* ---------- 采集说明 ---------- */

.page-about .about-process {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin: 22px 0 0;
}

.page-about .about-process__notes {
  border-top: 1px solid var(--line);
  min-width: 0;
}

.page-about .about-process__notes li {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink);
}

.page-about .about-process__notes b {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--teal);
  padding-top: 3px;
}

/* ---------- 团队分工 ---------- */

.page-about .about-roles {
  margin: 20px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-roles__item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-roles__num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-roles__name {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--white);
}

.page-about .about-roles__desc {
  margin-top: 7px;
  font-size: 15px;
  line-height: 1.58;
  color: var(--ink-dim);
}

/* ---------- 资质标签 ---------- */

.page-about .about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
}

/* ---------- 合作入口 ---------- */

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 窄屏 ---------- */

@media (max-width: 519px) {
  .page-about .about-stats dd {
    font-size: 17px;
  }
  .page-about .about-band__num {
    font-size: 24px;
  }
  .page-about .about-band__title {
    font-size: 19px;
  }
}

/* ---------- 平板 ---------- */

@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-process {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }
}

/* ---------- 桌面：左轨编号 + 右栏正文的杂志节奏 ---------- */

@media (min-width: 860px) {
  .page-about {
    padding-bottom: 88px;
  }

  .page-about .about-hero {
    padding-top: 26px;
  }

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

  .page-about .about-band {
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 36px;
    padding: 50px 0 24px;
  }

  .page-about .about-band__index {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .page-about .about-band__num {
    font-size: 38px;
  }

  .page-about .about-band__title {
    font-size: 26px;
  }

  .page-about .about-offset {
    margin-left: var(--about-indent);
    margin-bottom: 44px;
  }

  .page-about .about-flowscroll {
    margin-left: var(--about-indent);
    margin-top: 22px;
  }

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

  .page-about .about-process {
    margin-left: var(--about-indent);
  }
}

/* ---------- 宽屏：相邻主题带左右错位 ---------- */

@media (min-width: 1040px) {
  .page-about .about-band--shift {
    grid-template-columns: 152px minmax(0, 1fr);
  }

  .page-about .about-band--shift .about-band__body {
    margin-left: 44px;
    max-width: 720px;
  }

  .page-about .about-band--tight .about-band__body {
    max-width: 620px;
  }

  .page-about .about-band:not(.about-band--shift):not(.about-band--tight) .about-band__body {
    max-width: 800px;
  }
}
<<<END>>>

.page-about {
  --sp: inherit;
}