.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  overflow-x: clip;
}

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

.page-about .band {
  margin-block: clamp(6px, 1.2vw, 12px);
}

.page-about .sec {
  padding-block: clamp(30px, 5.2vw, 62px);
}

/* ---------- 首屏框景 ---------- */
.page-about .story-hero {
  padding-block: clamp(18px, 3.6vw, 32px) clamp(26px, 4.4vw, 50px);
  border-bottom: 1px solid var(--rule);
}

.page-about .hero-frame {
  position: relative;
  margin-top: clamp(14px, 2.4vw, 24px);
  padding: clamp(18px, 3.4vw, 42px);
  border: 1px solid var(--rule);
  background: var(--card);
}

.page-about .hero-frame::before,
.page-about .hero-frame::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--fruit);
}

.page-about .hero-frame::before {
  top: -1px;
  left: -1px;
}

.page-about .hero-frame::after {
  right: -1px;
  bottom: -1px;
}

.page-about .hero-grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .hero-main {
  display: grid;
  gap: clamp(12px, 1.8vw, 18px);
  align-content: start;
  min-width: 0;
}

.page-about .hero-main .h-display {
  margin: 0;
  max-width: 12em;
}

.page-about .hero-main .prose {
  max-width: 32em;
}

.page-about .hero-side {
  border: 1px solid var(--rule);
  background: var(--paper);
  padding: clamp(16px, 2.4vw, 22px);
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .hero-side__k {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--leaf);
}

.page-about .hero-side__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--rule);
}

.page-about .hero-side__row:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .hero-side__label {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--ink);
  opacity: 0.75;
}

.page-about .hero-side__v {
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1;
  color: var(--green-deep);
}

.page-about .hero-side__u {
  font-size: 0.6em;
  letter-spacing: 0.04em;
  color: var(--fruit-deep);
  margin-left: 2px;
}

.page-about .hero-side__note {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--ink);
  opacity: 0.72;
}

@media (min-width: 880px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1fr) 262px;
    align-items: start;
  }
}

/* ---------- 通栏时间线 ---------- */
.page-about .longline {
  padding-block: clamp(18px, 3vw, 32px);
  border-bottom: 1px solid var(--rule);
}

.page-about .longline .media {
  margin: 0;
  border: 1px solid var(--rule);
  background: var(--card);
  padding: clamp(8px, 1.4vw, 14px);
}

.page-about .longline .media__img,
.page-about .team__media .media__img,
.page-about .principle__media .media__img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .longline .media__cap,
.page-about .team__media .media__cap,
.page-about .principle__media .media__cap {
  display: block;
  margin-top: 10px;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--ink);
  opacity: 0.78;
}

/* ---------- 章节通用标题区 ---------- */
.page-about .sec-head {
  display: grid;
  gap: 10px;
  max-width: 62ch;
  margin-bottom: clamp(20px, 3.2vw, 32px);
}

.page-about .sec-head .h-sub,
.page-about .sec-head .eyebrow,
.page-about .sec-head .lead {
  margin: 0;
}

.page-about .sec-head .lead {
  max-width: 40em;
}

/* ---------- 四个阶段 ---------- */
.page-about .stage-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .stage-jump a {
  display: inline-block;
  padding: 7px 12px;
  border: 1px solid var(--rule);
  background: var(--card);
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--green-deep);
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.page-about .stage-jump a:hover,
.page-about .stage-jump a:focus-visible {
  border-color: var(--leaf);
  color: var(--fruit-deep);
  outline: none;
}

.page-about .stage-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
}

.page-about .stage {
  display: grid;
  gap: 10px;
  scroll-margin-top: 96px;
  min-width: 0;
}

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

.page-about .chapter__num {
  flex: none;
  padding: 3px 8px;
  border: 1px solid var(--fruit);
  color: var(--fruit-deep);
  font-size: 0.82rem;
  line-height: 1.3;
  letter-spacing: 0.08em;
}

.page-about .stage--2 .chapter__num {
  border-color: var(--leaf);
  color: var(--leaf);
}

.page-about .stage--3 .chapter__num {
  border-color: var(--leaf);
  color: var(--leaf);
}

.page-about .chapter__axis {
  display: none;
}

.page-about .stage__body {
  border: 1px solid var(--rule);
  background: var(--card);
  min-width: 0;
}

.page-about .stage__bar {
  height: 6px;
  background: var(--leaf);
}

.page-about .stage--1 .stage__bar {
  height: 6px;
  background: var(--leaf);
}

.page-about .stage--2 .stage__bar {
  height: 12px;
  background: var(--leaf-hi);
}

.page-about .stage--3 .stage__bar {
  height: 18px;
  background: var(--fruit-hi);
}

.page-about .stage--4 .stage__bar {
  height: 26px;
  background: var(--fruit);
}

.page-about .stage__inner {
  padding: clamp(16px, 2.8vw, 26px);
  display: grid;
  gap: 10px;
}

.page-about .stage__k {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--leaf);
}

.page-about .stage__title {
  margin: 0;
  font-size: clamp(1.3rem, 2.6vw, 1.8rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--green-deep);
}

.page-about .stage__pain {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.78;
}

.page-about .stage__fix {
  margin: 0;
  padding-left: 13px;
  border-left: 3px solid var(--fruit);
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--green-deep);
}

@media (min-width: 760px) {
  .page-about .stage__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: clamp(18px, 3vw, 34px);
    align-items: start;
  }

  .page-about .stage__k,
  .page-about .stage__title {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .stage {
    grid-template-columns: 74px minmax(0, 1fr);
    column-gap: 26px;
  }

  .page-about .chapter__rail {
    flex-direction: column;
    align-items: center;
    gap: 10px;
    height: 100%;
  }

  .page-about .chapter__axis {
    display: block;
    flex: 1 1 auto;
    width: 1px;
    min-height: 40px;
    background: var(--rule);
  }
}

/* ---------- 规模数字 ---------- */
.page-about .figures {
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .figure {
  background: var(--card);
  padding: clamp(18px, 3vw, 26px);
  display: grid;
  gap: 7px;
  align-content: start;
}

.page-about .figure__num {
  margin: 0;
  font-size: clamp(1.9rem, 4.4vw, 3rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--green-deep);
}

.page-about .figure__unit {
  font-size: 0.4em;
  letter-spacing: 0.06em;
  margin-left: 4px;
  color: var(--fruit-deep);
}

.page-about .figure__cap {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--green-deep);
}

.page-about .figure__meta {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.68;
  color: var(--ink);
  opacity: 0.78;
}

@media (min-width: 640px) {
  .page-about .figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-about .figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 团队分工 ---------- */
.page-about .team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
  align-items: start;
}

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

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

.page-about .team__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  padding-block: 16px;
  border-bottom: 1px solid var(--rule);
}

.page-about .team__n {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--fruit-deep);
}

.page-about .team__name {
  margin: 0 0 4px;
  font-size: 1rem;
  font-weight: 800;
  color: var(--green-deep);
}

.page-about .team__desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.72;
}

.page-about .team__media {
  margin: 0;
  border: 1px solid var(--rule);
  background: var(--card);
  padding: clamp(8px, 1.4vw, 14px);
}

@media (min-width: 900px) {
  .page-about .team__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }
}

/* ---------- 会员三档 ---------- */
.page-about .plans__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .plans .seg__tab {
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 10px 20px;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--rule);
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.page-about .plans .seg__tab:hover {
  border-color: var(--leaf-hi);
}

.page-about .plans .seg__tab[aria-selected="true"] {
  background: var(--card);
  border-color: var(--leaf);
  color: var(--green-deep);
  box-shadow: inset 0 -3px 0 var(--leaf);
}

.page-about .plans .seg__tab:focus-visible {
  outline: 2px solid var(--fruit-hi);
  outline-offset: 2px;
}

.page-about .plans__panel {
  margin-top: -1px;
  border: 1px solid var(--rule);
  background: var(--card);
  padding: clamp(18px, 3vw, 28px);
  display: grid;
  gap: 14px;
}

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

.page-about .plans__who {
  margin: 0;
  max-width: 46ch;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--green-deep);
}

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

.page-about .plans__list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.92rem;
  line-height: 1.72;
}

.page-about .plans__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--leaf);
}

@media (min-width: 760px) {
  .page-about .plans__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 26px;
  }
}

/* ---------- 一条原则 ---------- */
.page-about .principle__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: start;
}

.page-about .principle__media {
  margin: 0;
  border: 1px solid var(--rule);
  background: var(--card);
  padding: clamp(8px, 1.4vw, 14px);
}

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

.page-about .principle__text .prose {
  max-width: 34em;
  margin-top: 0;
  margin-bottom: 16px;
}

.page-about .principle__notes {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .principle__notes li {
  border-left: 2px solid var(--leaf);
  padding-left: 13px;
  font-size: 0.9rem;
  line-height: 1.72;
}

@media (min-width: 900px) {
  .page-about .principle__grid {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  }
}

/* ---------- 收束 ---------- */
.page-about .next {
  padding-block: clamp(34px, 5.4vw, 68px);
  border-top: 1px solid var(--rule);
}

.page-about .next .h-sub {
  margin: 0 0 12px;
}

.page-about .next .prose {
  max-width: 40em;
  margin: 0;
}

.page-about .next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .plans .seg__tab,
  .page-about .stage-jump a {
    transition: none;
  }
}