.page-about .about-hero {
  position: relative;
  padding: clamp(18px, 3.4vw, 38px) 0 clamp(38px, 6vw, 74px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-lime), transparent);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

@media (min-width: 1000px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.42fr) minmax(290px, 0.72fr);
    gap: clamp(36px, 5vw, 72px);
  }
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(33px, 6.2vw, 62px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  font-weight: 800;
  color: var(--chalk);
}

.page-about .about-hero__lead-text {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero__lead-text:first-of-type {
  color: var(--chalk);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__index {
  border: 1px solid var(--line-lime);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 2.8vw, 26px);
  background: linear-gradient(160deg, var(--panel) 0%, var(--ink-2) 100%);
  box-shadow: var(--shadow-card);
}

.page-about .about-hero__index-cap {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-about .about-hero__index-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__index-list li + li {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-hero__index-list a {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 2px 10px;
  padding: 12px 8px;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--chalk);
  transition: background 0.22s ease;
}

.page-about .ix-no {
  grid-row: 1 / span 2;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--lime);
}

.page-about .ix-name {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.3;
}

.page-about .ix-note {
  font-size: 12.5px;
  color: var(--mist);
  line-height: 1.4;
}

.page-about .about-hero__index-list a:hover,
.page-about .about-hero__index-list a:focus-visible {
  background: rgba(198, 242, 78, 0.08);
}

.page-about .about-hero__index-list a:hover .ix-name,
.page-about .about-hero__index-list a:focus-visible .ix-name {
  color: var(--lime-hi);
}

/* ---------- 通用章节 ---------- */

.page-about .about-sec {
  padding-block: clamp(38px, 6.4vw, 76px);
}

.page-about .about-hero__lead,
.page-about .about-split__text,
.page-about .about-sec .section__head {
  min-width: 0;
}

.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
}

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

.page-about .about-foot {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--lime);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 01 分栏 ---------- */

.page-about .about-split {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  align-items: start;
  margin-top: clamp(18px, 3vw, 28px);
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 1fr);
  }
}

/* ---------- 02 规模数字 ---------- */

.page-about .about-scale {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(18px, 3vw, 28px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: var(--line-soft);
  overflow: hidden;
}

@media (min-width: 820px) {
  .page-about .about-scale {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-scale__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 170px;
  padding: clamp(18px, 2.6vw, 30px) clamp(16px, 2.2vw, 24px);
  background: var(--ink-2);
  transition: background 0.25s ease;
}

.page-about .about-scale__cell:hover {
  background: var(--panel);
}

.page-about .about-scale__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(32px, 6vw, 56px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lime);
}

.page-about .about-scale__unit {
  margin-left: 4px;
  font-size: 0.34em;
  letter-spacing: 0;
  color: var(--lime-hi);
}

.page-about .about-scale__label {
  font-size: 15px;
  font-weight: 600;
  color: var(--chalk);
}

.page-about .about-scale__note {
  margin-top: auto;
  font-size: 13px;
  line-height: 1.62;
  color: var(--mist);
}

/* ---------- 03 版本时间轴 ---------- */

.page-about .vtl {
  --vtl-rail: 78px;
  position: relative;
  margin: clamp(22px, 4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 860px) {
  .page-about .vtl {
    --vtl-rail: 132px;
  }
}

.page-about .vtl::before {
  content: "";
  position: absolute;
  left: calc(var(--vtl-rail) / 2 - 1px);
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime) 0%, var(--cyan) 42%, rgba(47, 214, 166, 0) 100%);
  opacity: 0.5;
}

.page-about .vtl__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--vtl-rail) minmax(0, 1fr);
  gap: clamp(12px, 2.4vw, 28px);
  padding-bottom: clamp(26px, 4.6vw, 50px);
  outline: none;
}

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

.page-about .vtl__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding-top: 2px;
}

.page-about .vtl__ver {
  padding: 3px 8px;
  border: 1px solid var(--line-lime);
  border-radius: var(--pill);
  background: rgba(198, 242, 78, 0.06);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--lime);
  white-space: nowrap;
}

.page-about .vtl__dot {
  flex: none;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid var(--lime);
  background: var(--ink);
  box-shadow: 0 0 0 5px rgba(198, 242, 78, 0.09);
}

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

.page-about .vtl__title {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--chalk);
}

.page-about .vtl__text {
  margin: 10px 0 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .vtl__more {
  margin: 10px 0 0;
  padding-left: 12px;
  border-left: 1px solid var(--line-lime);
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .vtl__media {
  margin: 18px 0 0;
  max-width: 640px;
}

@media (hover: hover) and (min-width: 860px) {
  .page-about .vtl__more {
    max-height: 0;
    margin-top: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.4s ease, opacity 0.3s ease, margin-top 0.3s ease;
  }

  .page-about .vtl__item:hover .vtl__more,
  .page-about .vtl__item:focus-within .vtl__more {
    max-height: 260px;
    margin-top: 10px;
    opacity: 1;
  }
}

/* ---------- 04 流程步骤条 ---------- */

.page-about .flow {
  display: grid;
  gap: 12px;
  margin: clamp(22px, 4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 900px) {
  .page-about .flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about .flow__step {
  position: relative;
  padding: 18px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: var(--panel);
  outline: none;
  transition: border-color 0.25s ease, background 0.25s ease;
}

@media (min-width: 900px) {
  .page-about .flow__step {
    padding: 22px 10px 0 0;
    border: 0;
    border-top: 2px solid var(--line);
    border-radius: 0;
    background: transparent;
  }

  .page-about .flow__step::before {
    content: "";
    position: absolute;
    top: -7px;
    left: 0;
    width: 12px;
    height: 12px;
    border: 2px solid var(--line);
    border-radius: 50%;
    background: var(--ink);
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
  }
}

.page-about .flow__step:hover,
.page-about .flow__step:focus-visible {
  border-color: var(--line-lime);
  background: var(--panel-2);
}

@media (min-width: 900px) {
  .page-about .flow__step:hover,
  .page-about .flow__step:focus-visible {
    border-top-color: var(--lime);
    background: transparent;
  }

  .page-about .flow__step:hover::before,
  .page-about .flow__step:focus-visible::before {
    border-color: var(--lime);
    box-shadow: 0 0 0 5px rgba(198, 242, 78, 0.12);
  }
}

.page-about .flow__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-about .flow__title {
  margin: 8px 0 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--chalk);
}

.page-about .flow__text {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .flow__detail {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.66;
  color: var(--mist);
  opacity: 0.85;
}

/* ---------- 05 团队 ---------- */

.page-about .about-band {
  position: relative;
  margin: 0 0 clamp(24px, 3.6vw, 38px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-band img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(160px, 26vw, 300px);
  object-fit: cover;
}

.page-about .about-band::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 58%;
  background: linear-gradient(180deg, rgba(7, 19, 15, 0) 0%, rgba(7, 19, 15, 0.88) 100%);
  pointer-events: none;
}

.page-about .about-band__cap {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 14px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--chalk);
}

.page-about .about-team {
  display: grid;
  gap: 16px;
  margin-top: clamp(18px, 3vw, 28px);
}

@media (min-width: 780px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-team__card {
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: var(--panel);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 4.4vw, 44px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lime);
}

.page-about .about-team__unit {
  margin-left: 6px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  color: var(--mist);
}

.page-about .about-team__role {
  margin: 14px 0 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--chalk);
}

.page-about .about-team__text {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.76;
  color: var(--mist);
}

/* ---------- 06 合作与联系 ---------- */

.page-about .about-partners {
  display: grid;
  gap: clamp(20px, 3.4vw, 36px);
  align-items: start;
  margin-top: clamp(18px, 3vw, 28px);
}

@media (min-width: 960px) {
  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.32fr) minmax(300px, 0.78fr);
  }
}

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

.page-about .about-partner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 18px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-partner:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-partner__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 36px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-partner__num small {
  margin-left: 4px;
  font-size: 0.38em;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--mist);
}

.page-about .about-partner__name {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--chalk);
}

.page-about .about-partner__text {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-contact {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line-lime);
  border-radius: var(--radius-lg);
  background: linear-gradient(165deg, var(--panel-2) 0%, var(--ink-2) 100%);
  box-shadow: var(--shadow-card);
}

.page-about .about-contact__cap {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .about-contact__title {
  margin: 12px 0 0;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 800;
  line-height: 1.32;
  color: var(--chalk);
}

.page-about .about-contact__text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-contact__mail {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  word-break: break-all;
  color: var(--lime-hi);
}

.page-about .about-contact .btn {
  margin-top: 18px;
}

@media (max-width: 519px) {
  .page-about .about-scale {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-scale__cell {
    min-height: 0;
  }
}