/* ================= 品牌概况（about）页面专属样式 ================= */

.page-about {
  --about-gap: clamp(52px, 7.5vw, 96px);
  --about-axis-w: 232px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(40px, 6vw, 76px) 0 clamp(24px, 3.5vw, 44px);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-hero__frame {
  position: relative;
  padding: clamp(24px, 4vw, 52px);
  background: linear-gradient(158deg, rgba(14, 122, 60, 0.08) 0%, rgba(11, 27, 58, 0.035) 58%, rgba(244, 247, 241, 0) 100%);
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 1.5px solid var(--green);
  clip-path: polygon(0 0, calc(100% - 30px) 0, 100% 30px, 100% 100%, 30px 100%, 0 calc(100% - 30px));
  pointer-events: none;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  top: 5px;
  left: clamp(24px, 4vw, 52px);
  right: clamp(24px, 4vw, 52px);
  height: 1px;
  background-image: repeating-linear-gradient(90deg, var(--green) 0 1px, transparent 1px 14px);
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-hero__head {
  position: relative;
}

.page-about .about-hero__head h1 {
  margin: 10px 0 0;
  font-size: clamp(32px, 5.4vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--graphite);
  max-width: 18em;
}

.page-about .about-hero__lead {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .about-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  margin-top: clamp(26px, 3.6vw, 42px);
  padding-top: 20px;
  border-top: 1px solid rgba(14, 122, 60, 0.28);
}

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

.page-about .about-hero__mval {
  display: block;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 36px);
  letter-spacing: 0.04em;
  line-height: 1;
  color: var(--green-deep);
}

.page-about .about-hero__mlabel {
  display: block;
  margin-top: 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--mist);
}

@media (min-width: 780px) {
  .page-about .about-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 整宽横幅图 ---------- */
.page-about .about-band {
  padding: 0 0 clamp(28px, 4vw, 52px);
}

.page-about .about-band__frame {
  margin: 0;
}

/* ---------- 主壳：正文 + 右侧刻度栏 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 56px);
  align-items: start;
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-about .about-flow {
  min-width: 0;
  display: grid;
  gap: var(--about-gap);
}

@media (min-width: 1024px) {
  .page-about .about-shell {
    grid-template-columns: minmax(0, 1fr) var(--about-axis-w);
    gap: clamp(40px, 5vw, 72px);
  }
}

/* ---------- 正文块 ---------- */
.page-about .about-block {
  min-width: 0;
}

.page-about .about-block__head {
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-about .about-block__head .section-head__meta {
  margin-top: 10px;
}

.page-about .about-prose p {
  margin: 0 0 1.15em;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.82;
  color: var(--graphite);
}

.page-about .about-prose p:last-child {
  margin-bottom: 0;
}

/* ---------- 流程关系图 ---------- */
.page-about .about-flowmap {
  display: grid;
  gap: 18px;
  margin: clamp(24px, 3.6vw, 40px) 0;
}

.page-about .about-flowmap__node {
  position: relative;
  padding: 20px 22px;
  background: var(--night);
  color: var(--paper);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: background 180ms ease, transform 180ms ease;
}

.page-about .about-flowmap__node::after {
  content: "";
  position: absolute;
  left: 36px;
  bottom: -18px;
  width: 1.5px;
  height: 18px;
  background: linear-gradient(180deg, var(--green) 0%, rgba(14, 122, 60, 0) 100%);
}

.page-about .about-flowmap__node:last-child::after {
  display: none;
}

.page-about .about-flowmap__node:hover,
.page-about .about-flowmap__node:focus-within {
  background: var(--night-lift);
  transform: translateX(4px);
}

.page-about .about-flowmap__step {
  display: block;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 26px;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--neon);
}

.page-about .about-flowmap__node h3 {
  margin: 10px 0 6px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-flowmap__node p {
  margin: 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 247, 241, 0.78);
}

.page-about .about-flowmap__output {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin-top: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--sub);
  transition: opacity 180ms ease, max-height 220ms ease, margin-top 220ms ease;
}

.page-about .about-flowmap__node:hover .about-flowmap__output,
.page-about .about-flowmap__node:focus-within .about-flowmap__output {
  opacity: 1;
  max-height: 40px;
  margin-top: 12px;
}

@media (min-width: 760px) {
  .page-about .about-flowmap {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 22px;
  }

  .page-about .about-flowmap__node::after {
    left: auto;
    right: -22px;
    top: 42px;
    bottom: auto;
    width: 22px;
    height: 1.5px;
    background: linear-gradient(90deg, var(--green) 0%, rgba(14, 122, 60, 0) 100%);
  }

  .page-about .about-flowmap__node:nth-child(2n)::after {
    display: none;
  }

  .page-about .about-flowmap__node:last-child::after {
    display: none;
  }
}

.page-about .about-workflow__fig {
  margin: clamp(4px, 1vw, 12px) 0 0;
}

/* ---------- 口径对照 ---------- */
.page-about .about-caliber__bar {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
}

.page-about .about-caliber__wrap {
  border-top: 1.5px solid var(--green-deep);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-caliber__table {
  min-width: 640px;
  width: 100%;
}

.page-about .about-caliber__table th[scope="row"] {
  font-family: var(--font-cn);
  font-weight: 700;
  color: var(--green-deep);
  white-space: nowrap;
}

.page-about .about-caliber__table td {
  vertical-align: top;
}

.page-about .about-caliber__note {
  margin: clamp(14px, 2vw, 20px) 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-caliber__note a {
  color: var(--green-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-versions__banner {
  margin: 0 0 clamp(24px, 3.6vw, 38px);
}

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

.page-about .about-versions__item {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 26px);
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--paper);
  scroll-margin-top: calc(var(--header-space) + 28px);
  transition: background 200ms ease;
}

.page-about .about-versions__item::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 1.5px solid rgba(14, 122, 60, 0.26);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  pointer-events: none;
  transition: border-color 200ms ease;
}

.page-about .about-versions__tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--green-deep);
  color: var(--neon);
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 24px;
  letter-spacing: 0.05em;
  line-height: 1;
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 0 100%);
}

.page-about .about-versions__body h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--graphite);
}

.page-about .about-versions__body p {
  margin: 0 0 10px;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--graphite);
}

.page-about .about-versions__fields {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--mist);
  margin-bottom: 0;
}

.page-about .about-versions__item:target {
  background: var(--night);
}

.page-about .about-versions__item:target::before {
  border-color: var(--neon);
}

.page-about .about-versions__item:target .about-versions__body h3 {
  color: var(--paper);
}

.page-about .about-versions__item:target .about-versions__body p {
  color: rgba(244, 247, 241, 0.82);
}

.page-about .about-versions__item:target .about-versions__fields {
  color: var(--sub);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-cadence__big {
  padding: clamp(22px, 3vw, 32px);
  background: var(--paper);
  border-left: 4px solid var(--green);
}

.page-about .about-cadence__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-cadence__value {
  margin: 10px 0 0;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(48px, 8.4vw, 80px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--green-deep);
}

.page-about .about-cadence__value span {
  margin-left: 10px;
  font-size: 0.26em;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .about-cadence__desc {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: 14px;
  line-height: 1.78;
  color: var(--graphite);
}

.page-about .about-cadence__side {
  padding: clamp(22px, 3vw, 32px);
  background: var(--night);
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-cadence__side-num {
  margin: 0;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--sub);
}

.page-about .about-cadence__side-text {
  margin: 14px 0 18px;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(244, 247, 241, 0.82);
}

.page-about .about-cadence__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cadence__list li {
  padding: 5px 11px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--neon);
  border: 1px solid rgba(228, 255, 74, 0.42);
}

.page-about .about-cadence__link {
  margin: 20px 0 0;
  font-size: 13px;
  letter-spacing: 0.02em;
}

.page-about .about-cadence__link a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(228, 255, 74, 0.5);
  padding-bottom: 2px;
}

.page-about .about-cadence__link a:hover {
  border-bottom-color: var(--neon);
}

@media (min-width: 820px) {
  .page-about .about-cadence__grid {
    grid-template-columns: 1.15fr 1fr;
    gap: 24px;
    align-items: stretch;
  }
}

/* ---------- 落款 ---------- */
.page-about .about-signoff {
  position: relative;
  padding: clamp(26px, 4vw, 44px) 0 clamp(20px, 3vw, 32px);
  border-top: 1.5px solid rgba(140, 156, 144, 0.32);
}

.page-about .about-signoff::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(14, 122, 60, 0) 0%, rgba(14, 122, 60, 0.38) 50%, rgba(14, 122, 60, 0) 100%);
}

.page-about .about-signoff__line {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--graphite);
}

.page-about .about-signoff__ank {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-signoff__links {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-signoff__links a {
  color: var(--green-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 右侧版本刻度栏 ---------- */
.page-about .about-axis {
  min-width: 0;
  padding-top: 6px;
}

.page-about .about-axis__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-axis__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-axis__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(140, 156, 144, 0.22);
  transition: color 160ms ease;
}

.page-about .about-axis__dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mist);
  transition: background 160ms ease, box-shadow 160ms ease;
}

.page-about .about-axis__ver {
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--green);
  transition: color 160ms ease;
}

.page-about .about-axis__name {
  min-width: 0;
  color: inherit;
}

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

.page-about .about-axis__link:hover .about-axis__dot,
.page-about .about-axis__link:focus-visible .about-axis__dot {
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(14, 122, 60, 0.2);
}

.page-about .about-axis__link:hover .about-axis__ver,
.page-about .about-axis__link:focus-visible .about-axis__ver {
  color: var(--green-deep);
}

@media (max-width: 1023px) {
  .page-about .about-axis {
    border-top: 1.5px solid rgba(14, 122, 60, 0.3);
    padding-top: 16px;
  }

  .page-about .about-axis__list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 6px;
  }

  .page-about .about-axis__list li {
    flex: 0 0 auto;
  }

  .page-about .about-axis__link {
    border: 1px solid rgba(14, 122, 60, 0.28);
    border-radius: 4px;
    padding: 8px 12px;
    white-space: nowrap;
  }
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 640px) {
  .page-about .about-hero__frame {
    padding: 20px 18px;
  }

  .page-about .about-flowmap__output {
    opacity: 1;
    max-height: 40px;
    margin-top: 10px;
  }

  .page-about .about-versions__item {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 12px;
  }

  .page-about .about-versions__tag {
    width: 44px;
    height: 44px;
    font-size: 19px;
  }

  .page-about .about-caliber__table {
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flowmap__node,
  .page-about .about-flowmap__output,
  .page-about .about-axis__dot,
  .page-about .about-axis__link,
  .page-about .about-versions__item {
    transition: none;
  }

  .page-about .about-flowmap__node:hover,
  .page-about .about-flowmap__node:focus-within {
    transform: none;
  }
}
<<<END>>>