.page-about {
  --about-gap: clamp(84px, 10vw, 148px);
  --about-hair: var(--wb-line);
  display: block;
  background: var(--wb-base);
  color: var(--wb-text);
}

/* ---------- 面包屑 ---------- */
.page-about .wb-crumb {
  padding-top: clamp(18px, 2.6vw, 30px);
}

.page-about .wb-crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--wb-font-mono);
  font-size: 13px;
  color: var(--wb-muted);
}

.page-about .wb-crumb__link {
  color: var(--wb-gold);
  text-decoration: none;
  border-bottom: 1px dashed transparent;
  transition: border-color 200ms var(--wb-ease), color 200ms var(--wb-ease);
}

.page-about .wb-crumb__link:hover,
.page-about .wb-crumb__link:focus-visible {
  border-bottom-color: var(--wb-gold);
  color: var(--wb-gold-bright);
}

.page-about .wb-crumb__item + .wb-crumb__item::before {
  content: "/";
  margin-right: 10px;
  color: var(--wb-line);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 56px);
  padding-block: clamp(36px, 5vw, 68px) var(--about-gap);
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: 5fr 7fr;
    align-items: end;
  }
}

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

.page-about .about-hero__lead::before {
  content: "";
  position: absolute;
  left: 0;
  top: -18px;
  width: 56px;
  height: 3px;
  background: var(--wb-gold);
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  font-family: var(--wb-font-display);
  font-size: clamp(34px, 6vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--wb-paper);
  max-width: 16ch;
}

.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: 96px;
  height: 6px;
  margin-top: 22px;
  background: linear-gradient(90deg, var(--wb-gold) 0 62%, var(--wb-cinnabar) 62% 100%);
}

.page-about .about-hero .wb-lede {
  margin-top: clamp(18px, 2.4vw, 28px);
  max-width: 46ch;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.85;
  color: var(--wb-text);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(24px, 3vw, 36px);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--wb-line);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(200deg, rgba(192, 138, 46, 0.22), transparent 46%),
    repeating-linear-gradient(0deg, rgba(230, 235, 242, 0.045) 0 1px, transparent 1px 26px);
}

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

/* ---------- 章节导航轨 ---------- */
.page-about .about-rail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  padding: 14px clamp(16px, 2vw, 24px);
  border-top: 1px solid var(--wb-hair);
  border-bottom: 1px solid var(--wb-hair);
  background: linear-gradient(90deg, rgba(23, 36, 66, 0.9), rgba(15, 26, 50, 0.5));
}

.page-about .about-rail__label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--wb-muted);
  text-transform: uppercase;
}

.page-about .about-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail .wb-toc__link {
  display: inline-block;
  padding: 4px 2px;
  font-family: var(--wb-font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--wb-text);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 200ms var(--wb-ease), border-color 200ms var(--wb-ease);
}

.page-about .about-rail .wb-toc__link:hover,
.page-about .about-rail .wb-toc__link:focus-visible {
  color: var(--wb-gold-bright);
  border-bottom-color: var(--wb-gold-bright);
}

.page-about .about-rail .wb-toc__link[aria-current="true"] {
  color: var(--wb-gold);
  border-bottom-color: var(--wb-gold);
}

/* ---------- 章节头 ---------- */
.page-about .about-sechead {
  max-width: 62ch;
  margin-bottom: clamp(34px, 4.5vw, 60px);
  position: relative;
  padding-left: 22px;
  border-left: 3px solid var(--wb-gold);
}

.page-about .about-sechead h2 {
  margin: 12px 0 0;
  font-family: var(--wb-font-display);
  font-size: clamp(27px, 3.4vw, 42px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--wb-paper);
}

.page-about .about-sechead__lede {
  margin: 16px 0 0;
  font-size: clamp(15px, 1.1vw, 16.5px);
  line-height: 1.9;
  color: var(--wb-muted);
}

.page-about .about-sechead--ink h2 {
  color: #101828;
}

.page-about .about-sechead--ink .about-sechead__lede {
  color: #4a5668;
}

.page-about .about-sechead--ink {
  border-left-color: var(--wb-cinnabar);
}

.page-about .about-sechead--ink .wb-eyebrow {
  color: var(--wb-cinnabar);
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl__visual {
  margin: 0 0 clamp(40px, 5vw, 68px);
}

.page-about .about-tl__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

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

.page-about .about-tl__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: repeating-linear-gradient(180deg, var(--wb-line) 0 6px, transparent 6px 12px);
}

@media (min-width: 1000px) {
  .page-about .about-tl__list::before {
    left: 118px;
  }
}

.page-about .about-tl__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding: 0 0 clamp(38px, 4.6vw, 64px) 34px;
  position: relative;
}

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

@media (min-width: 1000px) {
  .page-about .about-tl__item {
    grid-template-columns: 118px minmax(0, 1fr) 250px;
    column-gap: clamp(28px, 3.4vw, 52px);
    padding-left: 0;
    align-items: start;
  }
}

.page-about .about-tl__year {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
}

@media (min-width: 1000px) {
  .page-about .about-tl__year {
    justify-content: flex-end;
    padding-right: 22px;
  }
}

.page-about .about-tl__num {
  font-size: 15px;
  letter-spacing: 0.06em;
  font-weight: 700;
  color: var(--wb-gold);
}

.page-about .about-tl__dot {
  position: absolute;
  left: 0;
  top: 50%;
  width: 15px;
  height: 15px;
  margin-top: -7.5px;
  background: var(--wb-base);
  border: 2px solid var(--wb-gold);
  transform: rotate(45deg);
  transition: background 220ms var(--wb-ease), box-shadow 220ms var(--wb-ease);
}

@media (min-width: 1000px) {
  .page-about .about-tl__dot {
    left: auto;
    right: -7px;
  }
}

.page-about .about-tl__dot--live {
  border-color: var(--wb-cinnabar);
  background: var(--wb-cinnabar);
  box-shadow: 0 0 0 5px rgba(194, 69, 47, 0.18);
}

.page-about .about-tl__item:hover .about-tl__dot,
.page-about .about-tl__item:focus-within .about-tl__dot {
  background: var(--wb-gold-bright);
  box-shadow: 0 0 0 6px rgba(232, 200, 122, 0.14);
}

.page-about .about-tl__body h3 {
  margin: 0;
  font-family: var(--wb-font-display);
  font-size: clamp(19px, 1.9vw, 25px);
  line-height: 1.34;
  font-weight: 800;
  color: var(--wb-paper);
}

.page-about .about-tl__body p {
  margin: 12px 0 0;
  font-size: clamp(14.5px, 1.05vw, 16px);
  line-height: 1.9;
  color: var(--wb-text);
  max-width: 62ch;
}

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

.page-about .about-tl__note {
  position: relative;
  padding: 12px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--wb-muted);
  background: rgba(23, 36, 66, 0.72);
  border-left: 2px solid var(--wb-line);
  transition: color 220ms var(--wb-ease), border-color 220ms var(--wb-ease), transform 220ms var(--wb-ease);
}

.page-about .about-tl__item:hover .about-tl__note,
.page-about .about-tl__item:focus-within .about-tl__note {
  color: var(--wb-text);
  border-left-color: var(--wb-gold);
  transform: translateX(3px);
}

/* ---------- 七类首局 ---------- */
.page-about .about-fg {
  background:
    linear-gradient(180deg, rgba(7, 13, 27, 0) 0%, rgba(7, 13, 27, 0.55) 100%),
    repeating-linear-gradient(135deg, rgba(42, 58, 95, 0.16) 0 1px, transparent 1px 22px);
}

.page-about .about-fg__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4vw, 52px);
}

@media (min-width: 1000px) {
  .page-about .about-fg__layout {
    grid-template-columns: 300px minmax(0, 1fr);
    align-items: start;
  }
}

.page-about .about-fg__visual {
  margin: 0;
  overflow: hidden;
}

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

.page-about .about-fg__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(20px, 2.6vw, 32px);
}

.page-about .about-fg__filters .wb-chip {
  padding: 8px 14px;
  font-family: var(--wb-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--wb-text);
  background: transparent;
  border: 1px solid var(--wb-line);
  cursor: pointer;
  transition: color 180ms var(--wb-ease), border-color 180ms var(--wb-ease), background 180ms var(--wb-ease);
}

.page-about .about-fg__filters .wb-chip:hover,
.page-about .about-fg__filters .wb-chip:focus-visible {
  color: var(--wb-gold-bright);
  border-color: var(--wb-gold);
}

.page-about .about-fg__filters .wb-chip[aria-pressed="true"],
.page-about .about-fg__filters .wb-chip.is-active {
  color: var(--wb-ink);
  background: var(--wb-gold);
  border-color: var(--wb-gold);
  font-weight: 700;
}

.page-about .about-fg__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--wb-line);
}

.page-about .about-fg__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: clamp(20px, 2.4vw, 28px) 0;
  border-bottom: 1px solid var(--wb-line);
  transition: background 180ms var(--wb-ease);
}

@media (min-width: 720px) {
  .page-about .about-fg__row {
    grid-template-columns: 108px minmax(0, 1fr);
    column-gap: clamp(20px, 2.6vw, 36px);
    align-items: start;
  }
}

.page-about .about-fg__row:hover {
  background: rgba(23, 36, 66, 0.5);
}

.page-about .about-fg__row.is-filtered {
  display: none;
}

.page-about .about-fg__tag {
  justify-self: start;
  align-self: start;
  margin-top: 2px;
}

.page-about .about-fg__text h3 {
  margin: 0;
  font-family: var(--wb-font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--wb-paper);
}

.page-about .about-fg__text p {
  margin: 10px 0 0;
  font-size: clamp(14.5px, 1.05vw, 16px);
  line-height: 1.85;
  color: var(--wb-text);
  max-width: 66ch;
}

.page-about .about-fg__foot {
  margin: clamp(24px, 3vw, 36px) 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--wb-muted);
  padding-left: 14px;
  border-left: 2px solid var(--wb-cinnabar);
}

.page-about .wb-tag--gold {
  color: var(--wb-gold-bright);
  border-color: var(--wb-gold);
}

.page-about .wb-tag--alert {
  color: var(--wb-cinnabar);
  border-color: var(--wb-cinnabar);
}

/* ---------- 团队 ---------- */
.page-about .about-team__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 3.6vw, 48px);
}

@media (min-width: 1080px) {
  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--wb-line);
  border: 1px solid var(--wb-line);
}

@media (min-width: 640px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-team__cell {
  position: relative;
  padding: clamp(22px, 2.8vw, 34px);
  background: var(--wb-panel);
  transition: background 240ms var(--wb-ease);
}

.page-about .about-team__cell::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 38px;
  height: 3px;
  background: var(--wb-gold);
}

.page-about .about-team__cell:hover {
  background: #1c2c50;
}

.page-about .about-team__cell--cs::before {
  background: var(--wb-gold-bright);
}

.page-about .about-team__cell--content::before {
  background: var(--wb-cinnabar);
}

.page-about .about-team__cell--ops::before {
  background: var(--wb-muted);
}

.page-about .about-team__num {
  display: block;
  font-size: clamp(34px, 4.4vw, 52px);
  line-height: 1;
  font-weight: 700;
  color: var(--wb-gold);
  letter-spacing: -0.02em;
}

.page-about .about-team__cell h3 {
  margin: 12px 0 0;
  font-family: var(--wb-font-display);
  font-size: 19px;
  font-weight: 800;
  color: var(--wb-paper);
}

.page-about .about-team__cell p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--wb-text);
}

.page-about .about-team__aside {
  display: flex;
  flex-direction: column;
  gap: clamp(22px, 2.6vw, 32px);
}

.page-about .about-team__aside .wb-media {
  margin: 0;
  overflow: hidden;
}

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

.page-about .about-team__flow {
  padding: clamp(22px, 2.6vw, 30px);
  background: rgba(23, 36, 66, 0.85);
  border: 1px solid var(--wb-line);
  border-top: 3px solid var(--wb-gold);
}

.page-about .about-team__flow h3 {
  margin: 0 0 18px;
  font-family: var(--wb-font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--wb-paper);
}

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

.page-about .about-team__steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--wb-text);
}

.page-about .about-team__steps .wb-mono {
  font-size: 12.5px;
  color: var(--wb-gold);
  padding-top: 2px;
}

/* ---------- 资质 ---------- */
.page-about .about-cred {
  background: var(--wb-paper);
  box-shadow: inset 0 0 0 1px rgba(16, 24, 40, 0.08);
}

.page-about .about-cred__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 2.4vw, 26px);
}

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

.page-about .about-badge {
  position: relative;
  padding: clamp(26px, 3.2vw, 40px) clamp(24px, 3vw, 36px);
  background: #ffffff;
  color: #101828;
  border: 1px solid rgba(16, 24, 40, 0.12);
  overflow: hidden;
  transition: transform 280ms var(--wb-ease), box-shadow 280ms var(--wb-ease);
}

.page-about .about-badge::after {
  content: "";
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 110px;
  height: 110px;
  background: linear-gradient(135deg, rgba(192, 138, 46, 0.16), transparent 70%);
  transform: rotate(45deg);
}

.page-about .about-badge:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px -20px rgba(16, 24, 40, 0.4);
}

.page-about .about-badge__code {
  display: inline-block;
  padding: 3px 10px;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #ffffff;
  background: var(--wb-gold);
}

.page-about .about-badge--cert .about-badge__code {
  background: var(--wb-cinnabar);
}

.page-about .about-badge--network .about-badge__code {
  background: #2f4470;
}

.page-about .about-badge--history .about-badge__code {
  background: #101828;
}

.page-about .about-badge h3 {
  margin: 16px 0 0;
  font-family: var(--wb-font-display);
  font-size: clamp(20px, 2.3vw, 27px);
  line-height: 1.25;
  font-weight: 800;
  color: #101828;
}

.page-about .about-badge p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: #3c4759;
  max-width: 46ch;
}

/* ---------- 三条原则 ---------- */
.page-about .about-prin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 2.6vw, 30px);
}

@media (min-width: 900px) {
  .page-about .about-prin__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-prin__item {
  position: relative;
  padding: clamp(26px, 3vw, 38px) clamp(22px, 2.6vw, 32px);
  background: linear-gradient(180deg, rgba(23, 36, 66, 0.9), rgba(15, 26, 50, 0.9));
  border: 1px solid var(--wb-line);
  clip-path: polygon(0 0, calc(100% - var(--wb-cut)) 0, 100% var(--wb-cut), 100% 100%, var(--wb-cut) 100%, 0 calc(100% - var(--wb-cut)));
  transition: border-color 260ms var(--wb-ease);
}

.page-about .about-prin__item:hover {
  border-color: var(--wb-gold);
}

.page-about .about-prin__idx {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--wb-gold);
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--wb-line);
}

.page-about .about-prin__item h3 {
  margin: 18px 0 0;
  font-family: var(--wb-font-display);
  font-size: clamp(21px, 2.2vw, 27px);
  font-weight: 800;
  color: var(--wb-paper);
}

.page-about .about-prin__item p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--wb-text);
}

.page-about .about-prin__hint {
  display: block;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--wb-line);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--wb-gold-bright);
}

.page-about .about-prin__cta {
  margin-top: clamp(38px, 4.6vw, 60px);
  padding: clamp(26px, 3.2vw, 40px) clamp(24px, 3vw, 40px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  background: rgba(23, 36, 66, 0.7);
  border-left: 4px solid var(--wb-gold);
}

.page-about .about-prin__cta p {
  margin: 0;
  font-size: clamp(15px, 1.2vw, 17px);
  line-height: 1.8;
  color: var(--wb-text);
  max-width: 52ch;
}

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

/* ---------- 显现动效降级 ---------- */
.page-about .about-hero__lead::before,
.page-about .about-hero__figure::after {
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 480px) {
  .page-about .about-fg__filters .wb-chip {
    padding: 7px 11px;
    font-size: 12px;
  }

  .page-about .about-rail__list {
    gap: 4px 14px;
  }

  .page-about .about-team__steps li {
    grid-template-columns: 28px minmax(0, 1fr);
  }
}

.page-about {
  --wb-hair: var(--wb-ink);
}