.page-about {
  --about-axis: #D9D5C9;
  background: var(--mist);
  color: var(--text);
  font-family: var(--font-serif);
  overflow-x: hidden;
}

.page-about .about-crumbs {
  padding-top: 16px;
  font-family: var(--font-round);
  font-size: 13px;
}

.page-about .about-crumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.page-about .about-crumbs a {
  color: var(--grass);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

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

.page-about .about-crumbs [aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

.page-about .kit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  font-family: var(--font-round);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.2;
  border: var(--edge);
  text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}

.page-about .kit-btn--primary {
  background: var(--gold);
  color: var(--ink);
}

.page-about .kit-btn--primary:hover {
  background: var(--gold-soft);
  transform: translateY(-2px);
}

.page-about .kit-btn--ghost {
  background: transparent;
  border-color: var(--mist);
  color: var(--mist);
}

.page-about .kit-btn--ghost:hover {
  background: var(--mist);
  color: var(--ink);
}

.page-about .kit-link {
  display: inline-block;
  font-family: var(--font-round);
  font-size: 15px;
  font-weight: 700;
  color: var(--grass);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 2px;
}

.page-about .kit-link:hover {
  color: var(--saddle);
}

.page-about .kit-section {
  padding-block: clamp(34px, 6vw, 64px);
}

.page-about .kit-wrap {
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--ink);
  color: var(--mist);
  border-bottom: var(--edge);
  overflow: hidden;
}

.page-about .about-hero__cut {
  position: absolute;
  right: -26%;
  bottom: -34%;
  width: 118%;
  height: 112%;
  background: var(--grass);
  clip-path: polygon(70% 0, 100% 0, 100% 100%, 0 100%);
  opacity: .95;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 34px;
  padding-block: clamp(38px, 8vw, 88px);
}

.page-about .about-hero__index {
  margin: 0;
  font-family: var(--font-round);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 16px 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 9vw, 86px);
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-about .about-hero__desc {
  margin: 0;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(246, 243, 234, .92);
}

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

.page-about .about-hero__facts {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: rgba(246, 243, 234, .3);
  border: 2px solid rgba(246, 243, 234, .55);
  align-self: end;
}

.page-about .about-hero__fact {
  background: var(--ink);
  padding: 14px 12px;
  min-width: 0;
}

.page-about .about-hero__fact dt {
  font-family: var(--font-round);
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(246, 243, 234, .7);
}

.page-about .about-hero__num {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(24px, 5vw, 34px);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--gold);
}

.page-about .about-hero__num span {
  margin-left: 5px;
  font-family: var(--font-round);
  font-size: 13px;
  font-weight: 400;
  color: rgba(246, 243, 234, .78);
}

/* ---------- 章节抬头 ---------- */
.page-about .about-chapter {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 3px solid var(--ink);
  margin-bottom: 26px;
}

.page-about .about-chapter__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  background: var(--grass-soft);
  border: var(--edge);
  padding: 6px 9px 8px;
}

.page-about .about-chapter__index {
  margin: 0 0 6px;
  font-family: var(--font-round);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--saddle);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 32px);
  line-height: 1.15;
  color: var(--ink);
}

/* ---------- 01 区域 ---------- */
.page-about .about-region__panel {
  display: grid;
  border: var(--edge);
  box-shadow: var(--shadow-hard);
  background: var(--mist);
  margin-bottom: 26px;
}

.page-about .about-region__body {
  padding: 22px 18px;
}

.page-about .about-region__body p {
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.85;
}

.page-about .about-region__media {
  margin: 0;
  border-top: var(--edge);
  background: var(--grass-soft);
}

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

.page-about .about-region__media figcaption {
  padding: 10px 16px;
  border-top: 2px solid var(--stone);
  background: var(--gold-soft);
  font-family: var(--font-round);
  font-size: 13px;
  line-height: 1.6;
  color: var(--saddle);
}

.page-about .about-region__cities {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-family: var(--font-round);
  font-size: 14px;
}

.page-about .about-region__cities li {
  border: 2px solid var(--ink);
  background: var(--grass-soft);
  padding: 5px 12px;
}

/* ---------- 02 四道关 ---------- */
.page-about .about-gates__lead {
  margin: 0 0 26px;
  max-width: 44em;
  font-size: 17px;
  line-height: 1.85;
}

.page-about .about-gates__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-gates__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
}

.page-about .about-gates__list::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 16px;
  width: 3px;
  background: var(--about-axis);
}

.page-about .about-gates__item {
  position: relative;
  padding-bottom: 24px;
}

.page-about .about-gates__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 6px;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  background: var(--gold);
  border: 3px solid var(--ink);
  border-radius: 50%;
}

.page-about .about-gates__item h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  color: var(--ink);
}

.page-about .about-gates__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  background: var(--ink);
  color: var(--mist);
  padding: 3px 7px;
}

.page-about .about-gates__item p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-gates__figure {
  position: relative;
  padding-bottom: 24px;
}

.page-about .about-gates__figure figure {
  margin: 0;
  border: var(--edge);
  box-shadow: 8px 8px 0 var(--stone);
  background: var(--mist);
}

.page-about .about-gates__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-gates__figure figcaption {
  padding: 10px 14px;
  border-top: 2px solid var(--stone);
  font-family: var(--font-round);
  font-size: 13px;
  line-height: 1.6;
  color: var(--saddle);
}

.page-about .about-cert {
  border: var(--edge);
  background: var(--mist);
  box-shadow: var(--shadow-hard);
  padding: 20px 18px;
}

.page-about .about-cert__seal {
  display: inline-block;
  margin: 0 0 14px;
  padding: 4px 10px;
  background: var(--official);
  color: #fff;
  font-family: var(--font-round);
  font-size: 11px;
  letter-spacing: .18em;
  transform: rotate(-2deg);
}

.page-about .about-cert__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  color: var(--ink);
}

.page-about .about-cert__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 2px solid var(--stone);
}

.page-about .about-cert__key {
  flex: none;
  font-family: var(--font-round);
  font-size: 13px;
  color: var(--saddle);
}

.page-about .about-cert__val {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  font-weight: 700;
  color: var(--ink);
  text-align: right;
}

.page-about .about-cert__note {
  margin: 14px 0 16px;
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 03 版本日志 ---------- */
.page-about .about-log__lead {
  margin: 0 0 26px;
  max-width: 44em;
  font-size: 17px;
  line-height: 1.85;
}

.page-about .about-log__acc {
  display: block;
}

.page-about .about-log__item {
  border: var(--edge);
  box-shadow: 6px 6px 0 var(--stone);
  background: var(--mist);
  margin-bottom: 14px;
}

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

.page-about .about-log__trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 14px 14px;
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-round);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  transition: background .24s var(--ease);
}

.page-about .about-log__trigger:hover {
  background: var(--grass-soft);
}

.page-about .about-log__trigger:focus-visible {
  outline: 3px solid var(--official);
  outline-offset: -3px;
}

.page-about .about-log__ver {
  flex: none;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .04em;
  border: 2px solid var(--ink);
  background: var(--gold-soft);
  padding: 3px 8px;
  transition: background .24s var(--ease);
}

.page-about .about-log__sum {
  flex: 1;
  min-width: 0;
  line-height: 1.5;
}

.page-about .kit-acc__icon {
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--grass);
}

.page-about .about-log__trigger[aria-expanded="true"] {
  background: var(--grass-soft);
  box-shadow: inset 4px 0 0 var(--gold);
}

.page-about .about-log__trigger[aria-expanded="true"] .about-log__ver {
  background: var(--gold);
}

.page-about .about-log__panel {
  padding: 0 16px 16px;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-log__panel p {
  margin: 0;
}

/* ---------- 04 准则 ---------- */
.page-about .about-rules__list {
  display: grid;
  gap: 16px;
}

.page-about .about-rule {
  border: var(--edge);
  border-left: 8px solid var(--saddle);
  background: var(--mist);
  padding: 20px 16px;
  transition: transform .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .about-rule__mark {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-round);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--saddle);
}

.page-about .about-rule h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  color: var(--ink);
}

.page-about .about-rule p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-rule__example {
  margin: 0;
  padding: 10px 12px;
  background: var(--gold-soft);
  border-left: 3px solid var(--gold);
  font-family: var(--font-round);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 05 伙伴 ---------- */
.page-about .about-partners__figure {
  margin: 0 0 30px;
  border: var(--edge);
  box-shadow: var(--shadow-hard);
  background: var(--mist);
}

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

.page-about .about-partners__figure figcaption {
  padding: 10px 14px;
  border-top: 2px solid var(--stone);
  background: var(--gold-soft);
  font-family: var(--font-round);
  font-size: 13px;
  line-height: 1.6;
  color: var(--saddle);
}

.page-about .about-partners__intro {
  margin: 0 0 24px;
  max-width: 44em;
  font-size: 17px;
  line-height: 1.85;
}

.page-about .about-partners__groups {
  display: grid;
  gap: 16px;
}

.page-about .about-partners__group {
  border: 2px solid var(--ink);
  background: var(--grass-soft);
  padding: 16px;
}

.page-about .about-partners__group h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  color: var(--ink);
}

.page-about .about-partners__note {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--saddle);
}

.page-about .about-partners__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
}

.page-about .about-partners__tags li {
  font-family: var(--font-round);
  font-size: 14px;
  line-height: 1.4;
  background: var(--mist);
  border: 2px solid var(--ink);
  padding: 5px 11px;
}

.page-about .about-partners__tags li:nth-child(even) {
  transform: translateY(6px);
}

.page-about .about-partners__honor {
  margin: 26px 0 0;
  padding: 10px 0 10px 14px;
  border-left: 6px solid var(--gold);
  font-family: var(--font-round);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 收束 ---------- */
.page-about .about-next {
  margin-top: clamp(28px, 5vw, 48px);
  padding-block: clamp(34px, 7vw, 64px);
  background: var(--grass);
  color: var(--mist);
  border-top: var(--edge);
  border-bottom: var(--edge);
}

.page-about .about-next__inner {
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-about .about-next h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 5vw, 36px);
  line-height: 1.2;
  color: var(--mist);
}

.page-about .about-next p {
  margin: 0 0 22px;
  max-width: 42em;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(246, 243, 234, .93);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

  .page-about .about-region__panel {
    grid-template-columns: 1.05fr .95fr;
  }

  .page-about .about-region__body {
    padding: 32px 30px;
  }

  .page-about .about-region__media {
    border-top: 0;
    border-left: var(--edge);
  }

  .page-about .about-partners__groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-rules__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-rule:first-child {
    grid-column: span 2;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1.35fr .85fr;
    align-items: end;
    gap: 48px;
  }

  .page-about .about-gates__grid {
    grid-template-columns: 1.45fr .85fr;
    align-items: start;
    gap: 40px;
  }

  .page-about .about-cert {
    position: sticky;
    top: 96px;
    padding: 24px 22px;
  }

  .page-about .about-rules__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-rule:first-child {
    grid-column: span 1;
  }

  .page-about .about-rule:hover {
    transform: translateX(6px);
    box-shadow: 8px 8px 0 var(--stone);
  }

  .page-about .about-log__trigger {
    padding: 16px 20px;
    font-size: 17px;
  }

  .page-about .about-region__cities {
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .kit-btn,
  .page-about .about-rule,
  .page-about .about-log__trigger,
  .page-about .about-log__ver {
    transition: none;
  }

  .page-about .kit-btn--primary:hover,
  .page-about .about-rule:hover {
    transform: none;
  }
}