/* ===== 页面作用域：品牌价值 /values/ ===== */
.page-about {
  display: block;
  background: var(--ink);
  color: var(--text);
}

/* --- 面包屑 --- */
.page-about .breadcrumb {
  padding: 20px var(--pad-x) 4px;
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: .06em;
  color: var(--muted);
}

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

.page-about .breadcrumb li + li::before {
  content: "／";
  margin-right: 6px;
  color: var(--grid);
}

.page-about .breadcrumb a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

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

/* --- 顶部品牌陈述带 --- */
.page-about .about-hero {
  position: relative;
  padding: 26px var(--pad-x) 46px;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(72, 227, 203, .13), transparent 62%),
    linear-gradient(180deg, var(--navy) 0%, var(--ink) 78%);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--grid) 18%, var(--grid) 82%, transparent);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  max-width: 1320px;
  margin: 0 auto;
}

.page-about .about-hero__text {
  display: flex;
  flex-direction: column;
}

.page-about .about-hero .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 6vw, var(--fs-5));
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-hero .lead {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: var(--fs-2);
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  padding: 1px;
  list-style: none;
  background: var(--grid);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 14px;
  background: var(--ink);
}

.page-about .about-hero__facts strong {
  font-family: var(--font-mono);
  font-size: var(--fs-4);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-hero__facts span {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--grid);
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 28px 100%, 0 calc(100% - 28px));
}

.page-about .about-hero__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

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

/* --- 主体：索引 + 内容 --- */
.page-about .about-body {
  padding: 34px var(--pad-x) 72px;
}

.page-about .about-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  max-width: 1320px;
  margin: 0 auto;
}

.page-about .about-index {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index a {
  flex: 0 0 auto;
  padding: 7px 12px;
  font-size: var(--fs-1);
  white-space: nowrap;
  text-decoration: none;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .about-index a:hover {
  color: var(--text);
  border-color: var(--teal);
}

.page-about .about-index a[data-active],
.page-about .about-index a[aria-current] {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

/* --- 章节通用 --- */
.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 24px);
  margin-bottom: 60px;
}

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

.page-about .about-section__head {
  margin-bottom: 20px;
}

.page-about .about-section .eyebrow {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(23px, 4.6vw, var(--fs-4));
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-section__title::after {
  content: "";
  display: block;
  width: 46px;
  height: 2px;
  margin-top: 12px;
  background: var(--lime);
}

.page-about .about-text {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: var(--fs-2);
  line-height: 1.78;
  color: var(--text);
}

.page-about .about-section__head .about-text {
  margin-top: 14px;
  color: var(--muted);
}

.page-about .about-text--tail {
  margin-top: 22px;
  color: var(--muted);
  font-size: var(--fs-1);
}

.page-about .about-text--tail a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid var(--grid);
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .about-text--tail a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about .about-callout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  margin-top: 22px;
  padding: 18px 20px;
  background: var(--board);
  border-left: 3px solid var(--lime);
}

.page-about .about-callout p {
  margin: 0;
  font-size: var(--fs-1);
  line-height: 1.75;
  color: var(--muted);
}

/* --- 四分区斜切索引 --- */
.page-about .sector-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  margin-top: 22px;
}

.page-about .sector {
  position: relative;
  padding: 22px 20px 22px 24px;
  background: var(--board);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
  transition: transform 240ms var(--ease), background 240ms var(--ease);
}

.page-about .sector::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--sector-accent, var(--lime));
  opacity: .55;
  transition: opacity 240ms var(--ease);
}

.page-about .sector:hover {
  transform: translateY(-2px);
  background: #14322B;
}

.page-about .sector:hover::before {
  opacity: 1;
}

.page-about .sector--a { --sector-accent: var(--lime); }
.page-about .sector--b { --sector-accent: var(--amber); }
.page-about .sector--c { --sector-accent: var(--teal); }
.page-about .sector--d { --sector-accent: var(--lime); }

.page-about .sector__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--sector-accent, var(--lime));
}

.page-about .sector__name {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-3);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .sector__desc {
  margin: 10px 0 0;
  font-size: var(--fs-1);
  line-height: 1.75;
  color: var(--muted);
}

.page-about .sector__count {
  margin: 14px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--grid);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--sector-accent, var(--lime));
  opacity: .68;
  transition: opacity 240ms var(--ease);
}

.page-about .sector:hover .sector__count {
  opacity: 1;
}

.page-about .sector__for {
  margin: 8px 0 0;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-about .sector-figure {
  margin: 26px 0 0;
}

.page-about .sector-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--grid);
}

.page-about .sector-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  line-height: 1.6;
  color: var(--muted);
}

/* --- 团队分工 --- */
.page-about .team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: center;
}

.page-about .team-ring-wrap {
  display: flex;
  justify-content: center;
}

.page-about .team-ring {
  display: block;
  width: 100%;
  max-width: 218px;
  height: auto;
  overflow: visible;
}

.page-about .team-ring circle {
  fill: none;
  stroke-width: 13;
}

.page-about .team-ring__track { stroke: var(--board); }
.page-about .team-ring__seg--a { stroke: var(--lime); }
.page-about .team-ring__seg--b { stroke: var(--amber); }
.page-about .team-ring__seg--c { stroke: var(--teal); }
.page-about .team-ring__seg--d { stroke: var(--muted); }

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

.page-about .team-list li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--grid);
}

.page-about .team-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .team-list__num {
  font-family: var(--font-mono);
  font-size: var(--fs-3);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .team-list h3 {
  margin: 0;
  font-size: var(--fs-2);
  font-weight: 700;
  color: var(--text);
}

.page-about .team-list p {
  margin: 5px 0 0;
  font-size: var(--fs-1);
  line-height: 1.72;
  color: var(--muted);
}

.page-about .team-texture {
  margin: 26px 0 0;
}

.page-about .team-texture img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 148px;
  object-fit: cover;
  opacity: .5;
  border: 1px solid var(--grid);
}

/* --- 发展历程时间轴 --- */
.page-about .timeline {
  position: relative;
  margin: 20px 0 0;
  padding: 0 0 0 26px;
  list-style: none;
  border-left: 1px solid var(--grid);
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: 28px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--lime);
  transform: rotate(45deg);
}

.page-about .timeline__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-3);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .timeline__body h3 {
  margin: 4px 0 0;
  font-size: var(--fs-2);
  font-weight: 700;
  color: var(--text);
}

.page-about .timeline__body p {
  margin: 6px 0 0;
  max-width: 46ch;
  font-size: var(--fs-1);
  line-height: 1.72;
  color: var(--muted);
}

/* --- 合作生态 --- */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  margin-top: 22px;
}

.page-about .partner {
  padding: 20px;
  background: var(--navy);
  border-top: 2px solid var(--amber);
}

.page-about .partner__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-4);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .partner h3 {
  margin: 6px 0 0;
  font-size: var(--fs-2);
  font-weight: 700;
  color: var(--text);
}

.page-about .partner p {
  margin: 8px 0 0;
  font-size: var(--fs-1);
  line-height: 1.72;
  color: var(--muted);
}

.page-about .honor {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 22px 0 0;
  padding: 16px 18px;
  font-size: var(--fs-1);
  line-height: 1.7;
  color: var(--text);
  background: var(--board);
  border-left: 3px solid var(--amber);
}

/* --- 服务承诺 --- */
.page-about .promise-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 20px 0 0;
  padding: 1px;
  list-style: none;
  background: var(--grid);
}

.page-about .promise-list li {
  padding: 18px;
  background: var(--ink);
}

.page-about .promise-list h3 {
  margin: 0;
  font-size: var(--fs-2);
  font-weight: 700;
  color: var(--text);
}

.page-about .promise-list h3::before {
  content: "▸";
  margin-right: 8px;
  color: var(--lime);
}

.page-about .promise-list p {
  margin: 8px 0 0;
  font-size: var(--fs-1);
  line-height: 1.72;
  color: var(--muted);
}

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

/* ===== 媒体查询 ===== */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-callout {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 24px;
  }

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

@media (min-width: 700px) {
  .page-about .sector-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .team-layout {
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
    gap: 42px;
  }
}

@media (min-width: 900px) {
  .page-about .timeline {
    padding-left: 0;
    border-left: 0;
  }

  .page-about .timeline::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: var(--grid);
  }

  .page-about .timeline__item {
    width: 50%;
    padding-right: 46px;
    padding-bottom: 36px;
  }

  .page-about .timeline__item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 46px;
  }

  .page-about .timeline__item::before {
    left: auto;
    right: -4.5px;
  }

  .page-about .timeline__item:nth-child(even)::before {
    right: auto;
    left: -4.5px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: 40px;
    padding-bottom: 54px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .about-hero h1 {
    max-width: 18ch;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body__grid {
    grid-template-columns: 188px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    flex-direction: column;
    gap: 2px;
    align-self: start;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--grid);
  }

  .page-about .about-index a {
    padding: 8px 14px;
    margin-left: -1px;
    background: transparent;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    color: var(--muted);
  }

  .page-about .about-index a:hover {
    color: var(--text);
    border-left-color: var(--teal);
  }

  .page-about .about-index a[data-active],
  .page-about .about-index a[aria-current] {
    color: var(--lime);
    background: linear-gradient(90deg, rgba(201, 255, 77, .12), transparent 85%);
    border-left-color: var(--lime);
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__note {
    display: block;
    position: absolute;
    top: 104px;
    right: 16px;
    margin: 0;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .3em;
    color: var(--grid);
    pointer-events: none;
  }
}