/* ===== 使命愿景页 · page-about ===== */

.page-about .about-crumbs {
  padding: 16px 0 4px;
}

/* --- 首屏 --- */
.page-about .about-hero {
  background-color: var(--ink-950);
  background-image:
    linear-gradient(var(--grid-line-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-light) 1px, transparent 1px);
  background-size: 100% 32px, 32px 100%;
  color: var(--paper-100);
  padding: 38px 0 46px;
  border-top: 1px solid var(--rule-light);
  border-bottom: 1px solid var(--rule-light);
}

.page-about .about-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber-500);
  margin: 0 0 14px;
}

.page-about .about-hero h1 {
  font-size: 28px;
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -.01em;
  margin: 0 0 16px;
  color: var(--paper-100);
}

.page-about .about-hero__lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--silver-300);
  margin: 0 0 28px;
  max-width: 42em;
}

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule-light-soft);
  border: 1px solid var(--rule-light);
}

.page-about .about-fact {
  background: var(--ink-800);
  padding: 13px 15px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: 21px;
  line-height: 1.15;
  font-weight: 600;
  color: var(--amber-500);
}

.page-about .about-fact__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--silver-300);
}

/* --- 章节骨架 --- */
.page-about .about-section {
  padding: 38px 0;
  border-bottom: 1px solid var(--rule-dark-soft);
}

.page-about .about-section--tight {
  padding-bottom: 26px;
}

.page-about .about-section--deep {
  background-color: var(--ink-800);
  background-image:
    linear-gradient(var(--grid-line-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-light) 1px, transparent 1px);
  background-size: 100% 30px, 30px 100%;
  border-bottom-color: var(--rule-light);
}

.page-about .about-index {
  margin-bottom: 14px;
}

.page-about .about-index__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate-700);
  margin: 6px 0 0;
}

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

.page-about .about-body h2 {
  font-size: 21px;
  line-height: 1.4;
  font-weight: 800;
  letter-spacing: -.005em;
  color: var(--ink-950);
  margin: 0 0 14px;
}

.page-about .about-body h3 {
  font-size: 17px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--ink-950);
  margin: 0 0 10px;
}

.page-about .about-body p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--slate-700);
  margin: 0 0 14px;
}

.page-about .about-section--deep .about-body h2,
.page-about .about-section--deep .about-body h3 {
  color: var(--paper-100);
}

.page-about .about-section--deep .about-body > p {
  color: var(--silver-300);
}

.page-about .about-section--deep .about-index__title {
  color: var(--silver-300);
}

/* --- 要点清单 --- */
.page-about .about-points {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  border-top: 1px solid var(--rule-dark-soft);
}

.page-about .about-points li {
  position: relative;
  padding: 12px 0 12px 24px;
  border-bottom: 1px solid var(--rule-dark-soft);
  font-size: 15px;
  line-height: 1.72;
  color: var(--slate-700);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 21px;
  width: 12px;
  height: 2px;
  background: var(--amber-500);
}

.page-about .about-section--deep .about-points li {
  color: var(--silver-300);
  border-bottom-color: var(--rule-light-soft);
}

/* --- 版本切换标签 --- */
.page-about .about-version-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
}

.page-about .about-version-tabs a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  padding: 7px 12px;
  border: 1px solid var(--rule-dark);
  background: var(--paper-card);
  color: var(--ink-950);
  text-decoration: none;
  transition: border-color .16s var(--ease), background-color .16s var(--ease);
}

.page-about .about-version-tabs a:hover,
.page-about .about-version-tabs a:focus-visible {
  border-color: var(--amber-500);
  background: var(--cream-200);
}

/* --- 纵向时间轴 --- */
.page-about .about-timeline {
  margin: 0 0 26px;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 26px 20px;
  border-left: 2px solid var(--rule-dark);
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 4px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 10px;
  height: 10px;
  background: var(--amber-500);
  border: 2px solid var(--paper-100);
}

.page-about .about-timeline__item--current {
  border-left-color: var(--indigo-600);
}

.page-about .about-timeline__item--current::before {
  background: var(--indigo-600);
}

.page-about .about-timeline__stamp {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  background: var(--indigo-600);
  color: var(--paper-100);
  padding: 4px 10px;
  margin: 0 0 10px;
}

.page-about .about-timeline__content .about-points {
  margin-bottom: 0;
}

/* --- 图片 --- */
.page-about .about-figure {
  margin: 24px 0 0;
}

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

/* --- 岗位表 --- */
.page-about .about-roles {
  border-top: 1px solid var(--rule-dark);
  margin: 0 0 8px;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2px 12px;
  padding: 14px 12px;
  border-bottom: 1px solid var(--rule-dark-soft);
  border-left: 3px solid transparent;
  transition: background-color .16s var(--ease), border-left-color .16s var(--ease);
}

.page-about .about-role:hover {
  background: var(--cream-200);
  border-left-color: var(--amber-500);
}

.page-about .about-role__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-950);
  margin: 0;
}

.page-about .about-role__count {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--amber-500);
  margin: 0;
  text-align: right;
}

.page-about .about-role__duty {
  grid-column: 1 / -1;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-700);
  margin: 2px 0 0;
}

/* --- 审阅步骤 --- */
.page-about .about-steps {
  list-style: none;
  counter-reset: about-step;
  padding: 0;
  margin: 0 0 18px;
  display: grid;
  gap: 8px;
}

.page-about .about-step {
  background: var(--paper-card);
  border: 1px solid var(--rule-dark-soft);
  border-left: 3px solid var(--wine-700);
  padding: 13px 15px;
  display: flex;
  gap: 13px;
  align-items: flex-start;
}

.page-about .about-step::before {
  counter-increment: about-step;
  content: "0" counter(about-step);
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.4;
  color: var(--wine-700);
  border: 1px solid var(--wine-700);
  padding: 2px 6px;
  margin-top: 2px;
}

.page-about .about-step__text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate-700);
}

.page-about .about-step__text strong {
  color: var(--ink-950);
}

.page-about .about-aside {
  font-size: 14px;
  line-height: 1.75;
  color: var(--silver-300);
  border-left: 2px solid var(--signal-500);
  padding-left: 14px;
  margin: 0 0 6px;
}

/* --- 色带 --- */
.page-about .band__inner {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-top: 12px;
  padding-bottom: 12px;
}

.page-about .band__text {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  margin: 0;
}

.page-about .band__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  margin: 0;
  opacity: .8;
}

/* --- 数字格 --- */
.page-about .about-reach {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule-dark-soft);
  border: 1px solid var(--rule-dark-soft);
}

.page-about .about-reach__cell {
  background: var(--paper-card);
  padding: 14px 15px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-reach__num {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1.1;
  font-weight: 600;
  color: var(--amber-500);
}

.page-about .about-reach__label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--slate-700);
}

/* --- 伙伴流程标签 --- */
.page-about .about-partners {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 0;
}

/* --- 收束区 --- */
.page-about .about-next {
  background-color: var(--ink-950);
  background-image:
    linear-gradient(var(--grid-line-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-light) 1px, transparent 1px);
  background-size: 100% 30px, 30px 100%;
  color: var(--paper-100);
  padding: 38px 0 46px;
}

.page-about .about-next h2 {
  font-size: 21px;
  line-height: 1.4;
  font-weight: 800;
  color: var(--paper-100);
  margin: 10px 0 20px;
}

.page-about .about-next__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--rule-light-soft);
  border: 1px solid var(--rule-light);
}

.page-about .about-next__link {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 15px 16px;
  background: var(--ink-800);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: background-color .16s var(--ease), border-left-color .16s var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  background: var(--indigo-600);
  border-left-color: var(--amber-500);
}

.page-about .about-next__link-label {
  font-size: 16px;
  font-weight: 700;
  color: var(--paper-100);
}

.page-about .about-next__link-note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--silver-300);
}

/* --- 平板及以上 --- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 56px 0 62px;
  }

  .page-about .about-hero h1 {
    font-size: 34px;
    max-width: 20em;
  }

  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-section {
    padding: 54px 0;
  }

  .page-about .about-index {
    position: sticky;
    top: 24px;
    align-self: start;
    margin-bottom: 0;
  }

  .page-about .about-body h2 {
    font-size: 26px;
  }

  .page-about .about-role {
    grid-template-columns: 150px 74px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
    padding: 16px 14px;
  }

  .page-about .about-role__duty {
    grid-column: auto;
    margin: 0;
  }

  .page-about .about-role__count {
    text-align: left;
  }

  .page-about .about-reach {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .band__inner {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: 24px;
  }

  .page-about .about-timeline__item {
    padding-left: 26px;
  }
}

/* --- 宽屏 --- */
@media (min-width: 1160px) {
  .page-about .about-hero h1 {
    font-size: 38px;
  }

  .page-about .about-next__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* --- 减少动效 --- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-next__link,
  .page-about .about-version-tabs a {
    transition: none;
  }
}