.page-about {
  padding-top: clamp(88px, 10vw, 116px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-bottom: clamp(18px, 3vw, 30px);
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--titanium);
}

.page-about .breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--line);
}

.page-about .breadcrumb__item a {
  color: var(--titanium);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.14s var(--ease), border-color 0.14s var(--ease);
}

.page-about .breadcrumb__item a:hover,
.page-about .breadcrumb__item a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.page-about .breadcrumb__item[aria-current="page"] {
  color: var(--white);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
  padding-block: clamp(16px, 3vw, 32px) clamp(32px, 6vw, 72px);
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 20px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 30px;
  height: 1px;
  background: var(--orange);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6vw, 64px);
  line-height: 1.03;
  letter-spacing: -0.035em;
  color: var(--white);
  max-width: 15ch;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.78;
  color: var(--titanium);
}

.page-about .about-hero__visual {
  margin: 0;
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid var(--line);
  background: linear-gradient(158deg, var(--deep) 0%, var(--void) 72%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .about-dial {
  width: 100%;
  max-width: 260px;
  height: auto;
}

.page-about .about-dial__axis,
.page-about .about-dial__ticks line {
  stroke: var(--line);
  stroke-width: 1;
}

.page-about .about-dial__legend line {
  stroke: var(--titanium);
  stroke-width: 1;
  opacity: 0.4;
}

.page-about .about-dial__dots circle {
  fill: var(--void);
  stroke: var(--titanium);
  stroke-width: 1;
}

.page-about .about-dial__live {
  fill: var(--orange);
  stroke: var(--orange-soft);
  stroke-width: 1;
}

/* ---------- 章节索引 ---------- */
.page-about .about-jump {
  margin-bottom: clamp(40px, 7vw, 84px);
}

.page-about .about-jump__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.page-about .about-jump__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 13px 14px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--titanium);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.3;
  transition: color 0.14s var(--ease), background-color 0.14s var(--ease);
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  color: var(--white);
  background: var(--panel);
}

.page-about .about-jump__num {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding-block: clamp(36px, 6vw, 72px);
}

.page-about .about-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 3vw, 34px);
  align-items: start;
  margin-bottom: clamp(28px, 4.5vw, 52px);
}

.page-about .about-head__ghost {
  font-family: var(--font-editorial);
  font-size: clamp(44px, 7.5vw, 96px);
  line-height: 0.8;
  letter-spacing: -0.03em;
  color: var(--white);
  opacity: 0.14;
}

/* ---------- 时间线 ---------- */
.page-about .about-tlwrap {
  display: block;
}

.page-about .about-plate {
  margin: 0 0 clamp(30px, 5vw, 48px);
}

.page-about .about-plate img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: 50% 32%;
}

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

.page-about .about-tl::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 6px;
  width: 1px;
  background: var(--line);
}

.page-about .about-tl__item {
  position: relative;
  padding-left: 40px;
  padding-bottom: clamp(26px, 4vw, 42px);
}

.page-about .about-tl__dot {
  position: absolute;
  top: 8px;
  left: 1px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--void);
  border: 1px solid var(--line);
  transition: background-color 0.14s var(--ease), border-color 0.14s var(--ease);
}

.page-about .about-tl__item:hover .about-tl__dot,
.page-about .about-tl__item:focus-within .about-tl__dot {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .about-tl__body {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  transition: border-color 0.14s var(--ease);
}

.page-about .about-tl__item:hover .about-tl__body,
.page-about .about-tl__item:focus-within .about-tl__body {
  border-bottom-color: var(--orange);
}

.page-about .about-tl__year {
  margin: 0 0 6px;
  font-family: var(--font-editorial);
  font-size: clamp(30px, 4.6vw, 50px);
  line-height: 1;
  color: var(--white);
}

.page-about .about-tl__event {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 1.6vw, 20px);
  letter-spacing: -0.012em;
  color: var(--white);
}

.page-about .about-tl__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--titanium);
}

.page-about .about-tl__more {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.62;
  color: var(--cyan);
  overflow: hidden;
  transition: max-height 0.16s var(--ease), opacity 0.16s var(--ease), margin-top 0.16s var(--ease);
}

/* ---------- 转折色带 ---------- */
.page-about .about-turn {
  margin-block: clamp(36px, 6vw, 76px);
  padding-block: clamp(28px, 4.5vw, 48px);
  color: var(--void);
}

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

.page-about .about-turn__label {
  margin: 0;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.72;
}

.page-about .about-turn__text {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 23px);
  line-height: 1.46;
  letter-spacing: -0.014em;
}

/* ---------- 双产品线 ---------- */
.page-about .about-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border: 1px solid var(--line);
}

.page-about .about-line {
  padding: clamp(22px, 3vw, 36px);
  background: var(--deep);
}

.page-about .about-line + .about-line {
  border-top: 1px solid var(--line);
}

.page-about .about-line__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-line__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.2vw, 26px);
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-line__count {
  margin: 0;
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--titanium);
}

.page-about .about-line__count span {
  font-size: 26px;
  color: var(--orange);
  letter-spacing: -0.03em;
}

.page-about .about-line__desc {
  margin: 16px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--titanium);
}

.page-about .about-line__series {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-line__series li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 16px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-line__key {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--white);
}

.page-about .about-line__val {
  font-family: var(--font-num);
  font-size: 13.5px;
  color: var(--orange-soft);
}

.page-about .about-line__use {
  grid-column: 1 / -1;
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--titanium);
}

.page-about .about-lines__foot {
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--titanium);
}

/* ---------- 服务网点 ---------- */
.page-about .about-net {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

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

.page-about .about-net__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(64px, 13vw, 132px);
  line-height: 0.86;
  letter-spacing: -0.055em;
  color: var(--orange);
}

.page-about .about-net__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--titanium);
}

.page-about .about-net__split {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: clamp(22px, 4vw, 34px) 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-net__split > div {
  padding: 16px 12px 0 0;
}

.page-about .about-net__split dt {
  font-size: 12.5px;
  line-height: 1.4;
  color: var(--titanium);
  margin-bottom: 6px;
}

.page-about .about-net__split dd {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(20px, 2.6vw, 30px);
  letter-spacing: -0.03em;
  color: var(--white);
}

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

.page-about .about-net__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-about .about-net__note {
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--titanium);
}

/* ---------- 渠道生态 ---------- */
.page-about .about-night {
  margin: 0 0 clamp(32px, 5vw, 56px);
}

.page-about .about-night img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-tree__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tree__row {
  padding: clamp(16px, 2.4vw, 24px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-tree__row:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-tree__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.page-about .about-tree__role {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 1.7vw, 19px);
  letter-spacing: -0.014em;
  color: var(--white);
}

.page-about .about-tree__count {
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--titanium);
}

.page-about .about-tree__cv {
  font-size: 24px;
  color: var(--white);
  letter-spacing: -0.03em;
}

.page-about .about-tree__bar {
  position: relative;
  height: 6px;
  margin: 14px 0 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-tree__fill {
  display: block;
  height: 100%;
  background: var(--cyan);
}

.page-about .about-tree__fill--p { width: 12%; }
.page-about .about-tree__fill--c { width: 54%; }
.page-about .about-tree__fill--x { width: 34%; }

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

.page-about .about-tree__foot {
  margin: clamp(22px, 3.5vw, 34px) 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--titanium);
}

/* ---------- 质保与响应 ---------- */
.page-about .about-cover {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-cover__col {
  padding: clamp(22px, 3vw, 34px);
  background: var(--void);
}

.page-about .about-cover__title {
  margin: 0 0 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 1.8vw, 20px);
  letter-spacing: -0.014em;
  color: var(--white);
}

.page-about .about-cover__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cover__list li + li {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-about .about-cover__tag {
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .about-cover__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--titanium);
}

.page-about .about-cover__foot {
  margin: clamp(22px, 3.5vw, 34px) 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--titanium);
}

/* ---------- 团队与资质 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.page-about .about-team__stat {
  margin: 0;
  padding-left: 18px;
  border-left: 2px solid var(--orange);
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(48px, 9vw, 92px);
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: var(--white);
}

.page-about .about-team__unit {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  color: var(--titanium);
}

.page-about .about-team__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--titanium);
}

.page-about .about-team__certs {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__certs li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--white);
}

.page-about .about-team__certs li + li {
  margin-top: 10px;
}

.page-about .about-team__certs li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-flow {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-flow__step {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  background: var(--deep);
}

.page-about .about-flow__idx {
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .about-flow__name {
  font-size: 14px;
  color: var(--white);
}

.page-about .about-team__note {
  margin: clamp(18px, 3vw, 26px) 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--titanium);
}

/* ---------- 合作对接 ---------- */
.page-about .about-partner {
  margin-top: clamp(24px, 4vw, 48px);
}

.page-about .about-partner__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  padding-top: clamp(28px, 4vw, 48px);
  border-top: 1px solid var(--line);
}

.page-about .about-partner__kicker {
  margin: 0 0 14px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-partner__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.028em;
  color: var(--white);
  max-width: 20ch;
}

.page-about .about-partner__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partner__list li {
  padding: 12px 0;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--titanium);
}

.page-about .about-partner__list li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-partner__asidetext {
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--titanium);
}

.page-about .about-partner__aside .btn {
  display: inline-flex;
  margin: 0 10px 10px 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-net__split {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-turn__inner {
    grid-template-columns: minmax(0, 0.42fr) minmax(0, 1fr);
    gap: 40px;
    align-items: baseline;
  }

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

  .page-about .about-line + .about-line {
    border-top: 0;
    border-left: 1px solid var(--line);
  }

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

  .page-about .about-team {
    grid-template-columns: minmax(0, 0.55fr) minmax(0, 1fr);
  }

  .page-about .about-partner__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(240px, 4fr);
    gap: clamp(40px, 5vw, 76px);
  }

  .page-about .about-jump__list {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-about .about-tlwrap {
    display: grid;
    grid-template-columns: minmax(240px, 0.66fr) minmax(0, 1.34fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-plate {
    position: sticky;
    top: 104px;
    margin-bottom: 0;
  }

  .page-about .about-tl::before {
    left: 50%;
  }

  .page-about .about-tl__item {
    width: 50%;
    padding-left: 0;
    padding-right: 52px;
  }

  .page-about .about-tl__item:nth-child(odd) {
    text-align: right;
  }

  .page-about .about-tl__item:nth-child(odd) .about-tl__dot {
    left: auto;
    right: -5px;
  }

  .page-about .about-tl__item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 52px;
  }

  .page-about .about-tl__item:nth-child(even) .about-tl__dot {
    left: -5px;
  }

  .page-about .about-net {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  }
}

@media (hover: hover) and (min-width: 1180px) {
  .page-about .about-tl__more {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
  }

  .page-about .about-tl__item:hover .about-tl__more,
  .page-about .about-tl__item:focus-within .about-tl__more {
    max-height: 10em;
    opacity: 1;
    margin-top: 10px;
  }
}

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

  .page-about .about-tl__more {
    max-height: none !important;
    opacity: 1 !important;
    margin-top: 10px !important;
  }
}