/* ============ 品牌介绍页 · page-about ============ */

.page-about {
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: 26px;
  padding-bottom: clamp(48px, 7vh, 80px);
  overflow: hidden;
  background:
    radial-gradient(1100px 520px at 6% -12%, rgba(255, 122, 26, .13), transparent 62%),
    radial-gradient(760px 420px at 96% 8%, rgba(74, 109, 140, .18), transparent 66%),
    linear-gradient(180deg, var(--c-deep) 0%, var(--c-night) 100%);
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-signal), transparent);
  opacity: .4;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vh, 44px);
  margin-top: clamp(24px, 4vh, 40px);
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: clamp(29px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.022em;
  color: var(--c-title);
  max-width: 22ch;
}

.page-about .about-hero__intro {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.82;
  color: var(--c-body);
}

.page-about .about-hero__chips {
  margin-top: 24px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__stats .stat {
  padding: 16px 16px 14px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: linear-gradient(158deg, rgba(18, 41, 63, .86), rgba(11, 31, 51, .48));
  transition: border-color var(--t-mid) var(--ease);
}

.page-about .about-hero__stats .stat:hover {
  border-color: var(--c-signal);
}

.page-about .about-hero__stats .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(23px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.01em;
  color: var(--c-signal);
  white-space: nowrap;
}

.page-about .about-hero__stats .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--c-meta);
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(300px, .82fr);
    gap: clamp(36px, 4.5vw, 72px);
    align-items: end;
  }
  .page-about .about-hero__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 主体框架 ---------- */
.page-about .about-body {
  padding-block: clamp(40px, 6vh, 74px) clamp(52px, 8vh, 100px);
}

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

@media (min-width: 1000px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: 196px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
    align-items: start;
  }
  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 118px;
    padding-right: 8px;
    border-right: 1px solid var(--c-line);
  }
}

.page-about .about-rail__eyebrow {
  display: block;
  margin: 0 0 14px;
}

.page-about .about-rail__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .about-rail .rail__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 10px 8px 8px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--r-xs) var(--r-xs) 0;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--c-meta);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

.page-about .about-rail .rail__link:hover {
  color: var(--c-paper);
  background: rgba(18, 41, 63, .55);
}

.page-about .about-rail .rail__link.is-active {
  color: var(--c-title);
  border-left-color: var(--c-signal);
  background: rgba(18, 41, 63, .68);
}

.page-about .about-rail__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--c-slate);
}

.page-about .about-rail .rail__link.is-active .about-rail__no {
  color: var(--c-signal);
}

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

/* ---------- 章节块 ---------- */
.page-about .about-block {
  padding-block: clamp(36px, 5vh, 62px);
  border-top: 1px solid var(--c-line);
}

.page-about .about-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-block--tint {
  border-top: 0;
  border-radius: var(--r-lg);
  padding-inline: clamp(18px, 3vw, 34px);
  background: linear-gradient(178deg, rgba(18, 41, 63, .62), rgba(11, 31, 51, .16));
  box-shadow: inset 0 0 0 1px var(--c-line);
}

.page-about .section__title {
  max-width: 26ch;
}

.page-about .section__lede {
  max-width: 62ch;
}

/* ---------- 服务三件事 ---------- */
.page-about .svc-list {
  margin: clamp(28px, 4vh, 42px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .svc-list__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  column-gap: 18px;
  row-gap: 8px;
  padding-block: clamp(20px, 3vh, 30px);
  border-top: 1px solid var(--c-line);
}

.page-about .svc-list__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .svc-list__no {
  grid-column: 1;
  grid-row: 1 / span 2;
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-signal);
}

.page-about .svc-list__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.1vw, 21px);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -.01em;
  color: var(--c-title);
}

.page-about .svc-list__text {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--c-body);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
  padding-block: clamp(26px, 4vh, 46px);
}

.page-about .about-figure--tight {
  padding-block: clamp(20px, 3vh, 32px) clamp(14px, 2vh, 22px);
}

.page-about .about-figure .figure__frame {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: linear-gradient(160deg, rgba(11, 31, 51, .9), rgba(5, 8, 13, .8));
}

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

.page-about .about-figure .figure__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--c-meta);
}

/* ---------- 三条产品线 ---------- */
.page-about .line-cards {
  display: grid;
  gap: 16px;
  margin-top: clamp(28px, 4vh, 42px);
}

@media (min-width: 900px) {
  .page-about .line-cards {
    grid-template-columns: 1.16fr 1fr .9fr;
    gap: 20px;
    align-items: start;
  }
}

.page-about .line-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.6vw, 28px);
  border-radius: var(--r-lg);
}

.page-about .line-card .panel__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.page-about .line-card .panel__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 19px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-title);
}

.page-about .line-card .panel__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--c-slate);
}

.page-about .line-card__text {
  margin: 4px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-body);
}

.page-about .line-card__points {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .line-card__points li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--c-meta);
}

.page-about .line-card__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .66em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-slate);
}

/* ---------- 时间轴 ---------- */
.page-about .tl {
  margin: clamp(18px, 3vh, 28px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 22px;
}

.page-about .tl__item {
  position: relative;
  padding-left: 30px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 26px;
  bottom: -22px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-slate), rgba(74, 109, 140, .18));
}

.page-about .tl__item:last-child::before {
  display: none;
}

.page-about .tl__marker {
  position: absolute;
  left: 0;
  top: 7px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--c-deep);
  border: 2px solid var(--c-signal);
  box-shadow: 0 0 0 4px rgba(255, 122, 26, .12);
}

.page-about .tl__card {
  padding: 18px 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-surface);
  transition: border-color var(--t-mid) var(--ease), transform var(--t-mid) var(--ease);
}

.page-about .tl__item:hover .tl__card,
.page-about .tl__item:focus-within .tl__card {
  border-color: var(--c-signal);
  transform: translateY(-3px);
}

.page-about .tl__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .09em;
  color: var(--c-signal);
}

.page-about .tl__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--c-title);
}

.page-about .tl__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--c-body);
}

.page-about .tl__note {
  margin: 12px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--c-signal);
  font-size: 13px;
  line-height: 1.66;
  color: var(--c-meta);
}

@media (min-width: 880px) {
  .page-about .tl {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }
  .page-about .tl__item {
    padding-left: 0;
    padding-top: 34px;
  }
  .page-about .tl__item::before {
    left: 0;
    right: 0;
    top: 8px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--c-slate), var(--c-slate));
    opacity: .6;
  }
  .page-about .tl__marker {
    left: 0;
    top: 0;
  }
  .page-about .tl__card {
    margin-right: 22px;
  }
  .page-about .tl__item:last-child .tl__card {
    margin-right: 0;
  }
  .page-about .tl__note {
    max-height: 0;
    margin-top: 0;
    padding-left: 0;
    border-left-color: transparent;
    overflow: hidden;
    opacity: 0;
    transition: max-height var(--t-slow) var(--ease), opacity var(--t-mid) var(--ease),
                margin-top var(--t-mid) var(--ease), padding-left var(--t-mid) var(--ease);
  }
  .page-about .tl__item:hover .tl__note,
  .page-about .tl__item:focus-within .tl__note {
    max-height: 170px;
    margin-top: 12px;
    padding-left: 10px;
    border-left-color: var(--c-signal);
    opacity: 1;
  }
}

/* ---------- 团队 ---------- */
.page-about .team-split {
  display: grid;
  gap: 26px;
  margin-top: clamp(26px, 4vh, 42px);
}

@media (min-width: 860px) {
  .page-about .team-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.06fr);
    gap: clamp(28px, 3.4vw, 46px);
    align-items: start;
  }
}

.page-about .team-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .team-stat {
  padding: 18px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: linear-gradient(158deg, rgba(18, 41, 63, .92), rgba(11, 31, 51, .5));
  transition: border-color var(--t-mid) var(--ease);
}

.page-about .team-stat:hover {
  border-color: var(--c-signal);
}

.page-about .team-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-title);
  white-space: nowrap;
}

.page-about .team-stat__num em {
  margin-left: 4px;
  font-style: normal;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--c-meta);
}

.page-about .team-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--c-meta);
}

.page-about .team-copy__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--c-title);
}

.page-about .team-copy p {
  margin: 0 0 14px;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--c-body);
}

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

/* ---------- 合作生态 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(26px, 4vh, 40px);
}

@media (min-width: 820px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

.page-about .partner-card {
  padding: clamp(20px, 2.5vw, 26px);
  border-radius: var(--r-lg);
}

.page-about .partner-card .panel__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--c-title);
}

.page-about .partner-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-body);
}

.page-about .partner-card a,
.page-about .about-cta a,
.page-about .compliance-item a {
  color: var(--c-signal-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 192, 138, .38);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .partner-card a:hover,
.page-about .about-cta a:hover,
.page-about .compliance-item a:hover {
  color: var(--c-signal);
  border-bottom-color: var(--c-signal);
}

/* ---------- 运营与合规 ---------- */
.page-about .compliance-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(26px, 4vh, 38px);
}

@media (min-width: 760px) {
  .page-about .compliance-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 32px;
  }
}

.page-about .compliance-item {
  padding-top: 14px;
  border-top: 1px solid var(--c-line-strong);
}

.page-about .compliance-item__k {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--c-signal);
}

.page-about .compliance-item p {
  margin: 0;
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-body);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-cta {
  border-top: 0;
  border-radius: var(--r-xl);
  padding-inline: clamp(22px, 4vw, 46px);
  padding-block: clamp(34px, 5vh, 54px);
  background:
    radial-gradient(600px 260px at 4% 0%, rgba(255, 122, 26, .16), transparent 68%),
    linear-gradient(150deg, rgba(18, 41, 63, .95), rgba(5, 8, 13, .9));
  box-shadow: inset 0 0 0 1px var(--c-line);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -.015em;
  color: var(--c-title);
  max-width: 24ch;
}

.page-about .about-cta__text {
  margin: 16px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.84;
  color: var(--c-body);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
<<<END>>>