.page-about {
  --about-rail: 208px;
  --about-gap: clamp(24px, 5vw, 72px);
  --about-sec-space: clamp(44px, 7vw, 88px);
  background: var(--ink-800);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(28px, 5vw, 64px) clamp(36px, 6vw, 84px);
  border-bottom: 1px solid var(--line);
  background: var(--ink-900);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.page-about .about-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
  filter: grayscale(0.35) contrast(1.08);
}

.page-about .about-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(112deg, rgba(11, 31, 58, 0.97) 18%, rgba(7, 21, 40, 0.8) 58%, rgba(0, 229, 255, 0.14) 100%),
    repeating-linear-gradient(90deg, transparent 0 96px, rgba(0, 229, 255, 0.045) 96px 97px);
}

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

.page-about .about-hero .breadcrumbs__link {
  color: var(--silver);
}

.page-about .about-hero .breadcrumbs__sep {
  color: rgba(174, 185, 201, 0.5);
}

.page-about .about-hero__kicker {
  margin: clamp(22px, 4vw, 46px) 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0.16em 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 8.6vw, 6.2rem);
  line-height: 0.94;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: clamp(18px, 3vw, 30px) 0 0;
  max-width: 58ch;
  font-size: clamp(0.98rem, 1.6vw, 1.1rem);
  line-height: 1.9;
  color: #D5E0EE;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(28px, 5vw, 50px) 0 0;
  padding: clamp(18px, 3vw, 26px) 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 28px);
}

.page-about .about-stats .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 3.4vw, 2.4rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-stats__k {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--silver);
}

@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 主体布局 ---------- */
.page-about .about-layout {
  padding-block: clamp(32px, 6vw, 78px);
  display: grid;
  gap: var(--about-gap);
}

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

/* ---------- 章节侧栏 ---------- */
.page-about .about-rail__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  color: var(--silver);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
  border-left: 0;
}

.page-about .about-rail__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  white-space: nowrap;
  font-size: 13px;
  line-height: 1.4;
  color: var(--silver);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--cyan-soft);
  border-color: rgba(0, 229, 255, 0.55);
  background: rgba(0, 229, 255, 0.07);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  opacity: 0.85;
}

@media (min-width: 980px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 84px);
  }

  .page-about .about-rail {
    position: sticky;
    top: clamp(92px, 14vh, 132px);
    align-self: start;
  }

  .page-about .about-rail__list {
    display: grid;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .about-rail__link {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    margin-left: -1px;
    padding: 10px 12px;
    font-size: 14px;
    white-space: normal;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    background: rgba(0, 229, 255, 0.06);
    border-left-color: var(--cyan);
  }
}

/* 锚点定位时高亮对应侧栏条目 */
.page-about:has(#sec-01:target) .about-rail__link[href="#sec-01"],
.page-about:has(#sec-02:target) .about-rail__link[href="#sec-02"],
.page-about:has(#sec-03:target) .about-rail__link[href="#sec-03"],
.page-about:has(#sec-04:target) .about-rail__link[href="#sec-04"],
.page-about:has(#sec-05:target) .about-rail__link[href="#sec-05"],
.page-about:has(#sec-06:target) .about-rail__link[href="#sec-06"] {
  color: var(--cyan);
  background: rgba(0, 229, 255, 0.09);
  border-left-color: var(--cyan);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding-top: clamp(36px, 6vw, 74px);
  scroll-margin-top: clamp(88px, 14vh, 128px);
}

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

.page-about .about-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: end;
  gap: clamp(12px, 3vw, 30px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-sec__idx {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 5.6vw, 4.2rem);
  line-height: 0.78;
  letter-spacing: 0.02em;
  color: rgba(0, 229, 255, 0.85);
}

@supports (-webkit-text-stroke: 1px red) {
  .page-about .about-sec__idx {
    color: transparent;
    -webkit-text-stroke: 1.5px rgba(0, 229, 255, 0.8);
  }
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 800;
  font-size: clamp(1.3rem, 2.6vw, 1.95rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-sec__body {
  margin-top: clamp(18px, 3vw, 30px);
}

.page-about .about-lead {
  margin: 0 0 clamp(18px, 3vw, 26px);
  max-width: 68ch;
  font-size: clamp(0.96rem, 1.4vw, 1.04rem);
  line-height: 1.9;
  color: #C6D2E1;
}

.page-about .about-lead:last-child {
  margin-bottom: 0;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .about-lead a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.45);
}

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

/* ---------- 01 场景行 ---------- */
.page-about .about-rows {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-row h3 {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cyan-soft);
}

.page-about .about-row p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: #BFCBDA;
}

@media (min-width: 760px) {
  .page-about .about-row {
    grid-template-columns: minmax(0, 190px) minmax(0, 1fr);
    gap: clamp(16px, 4vw, 44px);
    align-items: baseline;
    padding: 18px 0;
  }
}

/* ---------- 02 流程 ---------- */
.page-about .about-flow__svg {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-about .about-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-flow__step {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(152deg, rgba(18, 50, 90, 0.58), rgba(7, 21, 40, 0.4));
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .about-flow__step:hover,
.page-about .about-flow__step:focus-within {
  border-color: rgba(0, 229, 255, 0.6);
  background: linear-gradient(152deg, rgba(18, 50, 90, 0.8), rgba(7, 21, 40, 0.5));
  transform: translateY(-2px);
}

.page-about .about-flow__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .about-flow__name {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-about .about-flow__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #AEBCCC;
}

@media (min-width: 760px) {
  .page-about .about-flow__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 22px;
  }
}

.page-about .about-figure {
  margin: clamp(22px, 4vw, 34px) 0 0;
}

.page-about .about-figure--wide {
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .about-figure .media-frame__img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* ---------- 03 里程碑 ---------- */
.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-about .about-filter .filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--silver);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .about-filter .filter-btn:hover,
.page-about .about-filter .filter-btn:focus-visible {
  color: var(--cyan-soft);
  border-color: rgba(0, 229, 255, 0.55);
}

.page-about .about-filter .filter-btn[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
  font-weight: 700;
}

.page-about .about-time {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--line);
  display: grid;
  gap: clamp(18px, 3vw, 30px);
}

.page-about .about-time__item {
  position: relative;
  padding-left: 4px;
  padding-bottom: 2px;
}

.page-about .about-time__item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.14);
}

.page-about .about-time__year {
  display: inline-block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-time__t {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-time__d {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.85;
  color: #AFBCCC;
}

.page-about .about-time__d a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.45);
}

.page-about .about-time__d a:hover,
.page-about .about-time__d a:focus-visible {
  color: var(--cyan);
}

/* ---------- 04 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px 16px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-team__name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
  text-align: right;
}

.page-about .about-team__bar {
  grid-column: 1 / -1;
  display: block;
  height: 5px;
  border-radius: 999px;
  background: rgba(174, 185, 201, 0.18);
  overflow: hidden;
}

.page-about .about-team__bar i {
  display: block;
  height: 100%;
  width: var(--w, 50%);
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan), var(--cyan-soft));
}

.page-about .about-team__desc {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #A9B6C7;
}

.page-about .about-team__total {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--silver);
}

.page-about .about-team__total strong {
  color: var(--orange);
  font-size: 16px;
  letter-spacing: 0.04em;
}

@media (min-width: 820px) {
  .page-about .about-team__row {
    grid-template-columns: 132px 66px minmax(96px, 1fr) minmax(0, 1.25fr);
    gap: clamp(12px, 2vw, 26px);
  }

  .page-about .about-team__bar,
  .page-about .about-team__desc {
    grid-column: auto;
  }

  .page-about .about-team__bar {
    max-width: 220px;
  }
}

/* ---------- 05 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  gap: 14px;
}

.page-about .about-eco__blob {
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, rgba(18, 50, 90, 0.72), rgba(7, 21, 40, 0.55));
}

.page-about .about-eco__k {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--silver);
}

.page-about .about-eco__t {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-eco__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: #B4C1D1;
}

.page-about .about-eco__blob--a {
  border-color: rgba(0, 229, 255, 0.4);
  background: linear-gradient(158deg, rgba(0, 229, 255, 0.16), rgba(7, 21, 40, 0.6));
}

.page-about .about-eco__blob--a .about-eco__k {
  color: var(--cyan);
}

.page-about .about-eco__blob--b {
  border-color: rgba(123, 97, 255, 0.42);
  background: linear-gradient(158deg, rgba(123, 97, 255, 0.18), rgba(7, 21, 40, 0.6));
}

.page-about .about-eco__blob--b .about-eco__k {
  color: #B4A6FF;
}

.page-about .about-eco__blob--c {
  border-color: rgba(255, 107, 53, 0.42);
  background: linear-gradient(158deg, rgba(255, 107, 53, 0.16), rgba(7, 21, 40, 0.6));
}

.page-about .about-eco__blob--c .about-eco__k {
  color: var(--orange-soft);
}

.page-about .about-eco__blob--d {
  border-color: rgba(174, 185, 201, 0.38);
  background: linear-gradient(158deg, rgba(174, 185, 201, 0.14), rgba(7, 21, 40, 0.6));
}

@media (min-width: 780px) {
  .page-about .about-eco {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-eco__blob--a {
    grid-column: span 4;
    border-radius: 44px 12px 44px 12px;
  }

  .page-about .about-eco__blob--b {
    grid-column: span 2;
    border-radius: 12px 44px 12px 44px;
  }

  .page-about .about-eco__blob--c {
    grid-column: span 2;
    border-radius: 12px 12px 44px 44px;
  }

  .page-about .about-eco__blob--d {
    grid-column: span 4;
    border-radius: 44px 12px 12px 44px;
  }
}

/* ---------- 06 承诺与联系 ---------- */
.page-about .about-trust {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-trust__item {
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-trust__item h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--cyan-soft);
}

.page-about .about-trust__item p {
  margin: 0;
  max-width: 66ch;
  font-size: 14px;
  line-height: 1.85;
  color: #B4C1D1;
}

.page-about .about-trust__item a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.45);
}

.page-about .about-trust__item a:hover,
.page-about .about-trust__item a:focus-visible {
  color: var(--cyan);
}

.page-about .about-contact {
  margin-top: clamp(26px, 4vw, 40px);
  padding: clamp(20px, 4vw, 36px);
  border: 1px solid rgba(255, 107, 53, 0.35);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(140deg, rgba(255, 107, 53, 0.14), rgba(11, 31, 58, 0.9) 62%),
    var(--ink-900);
}

.page-about .about-contact__k {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--orange-soft);
}

.page-about .about-contact__t {
  margin: 0 0 clamp(16px, 3vw, 24px);
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-contact__grid {
  display: grid;
  gap: 14px 24px;
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-about .about-contact__item {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.page-about .about-contact__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--silver);
}

.page-about .about-contact__v {
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-about .about-contact__cta {
  display: inline-block;
}

.page-about .about-contact__icp {
  margin: clamp(16px, 3vw, 22px) 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--silver);
}

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

@media (min-width: 980px) {
  .page-about .about-contact__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about {
  --w: 1rem;
}