.page-about {
  --about-pad: clamp(56px, 8vw, 112px);
  --about-h1: clamp(1.95rem, 5.2vw, 3.6rem);
  background: var(--ink-900);
  color: var(--text);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(40px, 8vw, 92px) 0 clamp(34px, 6vw, 70px);
  background:
    radial-gradient(120% 90% at 84% 4%, rgba(255, 106, 0, .20), transparent 58%),
    radial-gradient(90% 80% at 6% 94%, rgba(59, 232, 160, .10), transparent 62%),
    var(--ink-900);
  color: var(--paper);
}

.page-about .about-hero-inner {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

@media (min-width: 960px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
}

.page-about .about-hero .breadcrumb {
  font-size: .8125rem;
  color: rgba(245, 248, 251, .55);
}

.page-about .about-hero .breadcrumb a {
  color: var(--orange-2);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb a:hover {
  text-decoration: underline;
}

.page-about .about-hero .eyebrow {
  margin-top: 18px;
  color: var(--neon);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-size: var(--about-h1);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.02em;
  max-width: 16ch;
  color: var(--paper);
}

.page-about .about-hero .lede {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: rgba(245, 248, 251, .78);
}

.page-about .about-hero-stats {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line-dark);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

@media (min-width: 640px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-hero-stats li {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 12px;
  border-left: 2px solid rgba(255, 106, 0, .5);
}

.page-about .hs-num {
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .04em;
  color: var(--paper);
}

.page-about .hs-label {
  font-size: .8125rem;
  line-height: 1.5;
  color: rgba(245, 248, 251, .6);
}

.page-about .about-hero-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-dark);
  box-shadow: var(--shadow);
  background: var(--ink-800);
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

/* ---------- 章节索引条 ---------- */
.page-about .about-spine {
  background: var(--ink-900);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-spine-inner {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 14px var(--gutter);
  max-width: var(--shell);
  margin-inline: auto;
  scrollbar-width: thin;
}

.page-about .about-spine-inner a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-dark);
  color: rgba(245, 248, 251, .78);
  font-size: .875rem;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .2s var(--ease), color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .about-spine-inner a .mono {
  font-size: .72rem;
  color: var(--orange-2);
  letter-spacing: .06em;
}

.page-about .about-spine-inner a:hover,
.page-about .about-spine-inner a.is-active {
  border-color: var(--orange);
  color: var(--paper);
  background: rgba(255, 106, 0, .14);
}

/* ---------- 分区底色 ---------- */
.page-about .about-band {
  position: relative;
  isolation: isolate;
  padding: var(--about-pad) 0;
}

.page-about .about-band + .about-band::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--orange-2) 48%, var(--neon));
}

.page-about .about-band--paper {
  background: var(--paper);
  color: var(--text);
}

.page-about .about-band--deep {
  background:
    radial-gradient(100% 120% at 92% 0%, rgba(20, 72, 111, .55), transparent 62%),
    var(--ink-900);
  color: var(--paper);
}

.page-about .about-band--jade {
  background:
    radial-gradient(110% 110% at 6% 0%, rgba(14, 79, 70, .95), transparent 70%),
    #0A3B35;
  color: var(--paper);
}

.page-about .about-band--wine {
  background:
    radial-gradient(110% 120% at 88% 0%, rgba(90, 18, 48, .95), transparent 68%),
    #43102A;
  color: var(--paper);
}

.page-about .about-band--indigo {
  background:
    radial-gradient(110% 120% at 10% 4%, rgba(43, 27, 82, .96), transparent 70%),
    #201140;
  color: var(--paper);
}

/* ---------- 左编号右内容 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 3vw, 22px);
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .about-num-col {
    position: sticky;
    top: 96px;
    align-self: start;
  }
}

.page-about .about-num {
  display: inline-block;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--orange);
}

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

.page-about .about-main-col h2 {
  margin: 0;
  max-width: 26ch;
  font-size: clamp(1.45rem, 3vw, 2.35rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.02em;
}

.page-about .about-lead {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-band:not(.about-band--paper) .about-lead {
  color: rgba(245, 248, 251, .74);
}

/* ---------- 三张错落卡片 ---------- */
.page-about .about-cards3 {
  margin-top: clamp(24px, 4vw, 42px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

@media (min-width: 760px) {
  .page-about .about-cards3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-cards3 > :nth-child(2) {
    margin-top: 30px;
  }

  .page-about .about-cards3 > :nth-child(3) {
    margin-top: 60px;
  }
}

.page-about .about-tile {
  padding: 22px 20px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 36px -28px rgba(5, 25, 44, .6);
}

.page-about .about-tile h3 {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-tile p {
  margin: 10px 0 0;
  font-size: .9375rem;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  margin: clamp(26px, 4vw, 42px) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-dark);
  background: rgba(245, 248, 251, .05);
}

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

.page-about .about-figure--square {
  max-width: 460px;
}

/* ---------- 时间线 ---------- */
.page-about .about-tl {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--orange), var(--orange-2) 52%, var(--neon));
}

.page-about .about-tl-item {
  position: relative;
  padding-left: 40px;
  padding-bottom: 26px;
}

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

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 9px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #43102A;
  border: 2px solid var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 0, .16);
  opacity: .38;
  transition: opacity .4s var(--ease), box-shadow .4s var(--ease);
}

.page-about .about-tl-item.is-visible::before {
  opacity: 1;
  box-shadow: 0 0 0 5px rgba(255, 106, 0, .26);
}

.page-about .about-tl-card {
  padding: 18px 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line-dark);
  background: rgba(245, 248, 251, .07);
}

.page-about .about-tl-year {
  display: inline-block;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--orange-2);
}

.page-about .about-tl-card h3 {
  margin: 8px 0 0;
  font-size: 1.0625rem;
  font-weight: 800;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .about-tl-card p {
  margin: 8px 0 0;
  font-size: .9375rem;
  line-height: 1.72;
  color: rgba(245, 248, 251, .74);
}

@media (min-width: 900px) {
  .page-about .about-tl::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .about-tl-item {
    width: 50%;
    padding-left: 0;
    padding-right: 42px;
    padding-bottom: 34px;
  }

  .page-about .about-tl-item:nth-child(even) {
    margin-left: 50%;
    padding-left: 42px;
    padding-right: 0;
  }

  .page-about .about-tl-item::before {
    left: auto;
    right: -9px;
    top: 11px;
  }

  .page-about .about-tl-item:nth-child(even)::before {
    left: -9px;
    right: auto;
  }
}

/* ---------- 团队条形 ---------- */
.page-about .about-bars {
  margin-top: clamp(24px, 4vw, 38px);
  display: grid;
  gap: 22px;
}

.page-about .about-bar-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .about-bar-name {
  font-size: .9375rem;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-bar-val {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--neon);
}

.page-about .about-bar-track {
  height: 10px;
  border-radius: 999px;
  background: rgba(245, 248, 251, .13);
  overflow: hidden;
}

.page-about .about-bar-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--orange), var(--orange-2));
}

.page-about .about-team-notes {
  margin-top: clamp(26px, 4vw, 40px);
  display: grid;
  gap: 14px;
  padding-top: 22px;
  border-top: 1px solid var(--line-dark);
}

@media (min-width: 860px) {
  .page-about .about-team-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }
}

.page-about .about-team-notes p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: rgba(245, 248, 251, .7);
}

.page-about .about-team-notes strong {
  display: block;
  margin-bottom: 6px;
  color: var(--paper);
  font-weight: 700;
}

/* ---------- 合作与访问能力 ---------- */
.page-about .about-net-stats {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

@media (min-width: 760px) {
  .page-about .about-net-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-net-cell {
  min-width: 0;
  padding: 18px 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line-dark);
  background: rgba(245, 248, 251, .07);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .net-num {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--orange-2);
}

.page-about .net-label {
  font-size: .8125rem;
  line-height: 1.5;
  color: rgba(245, 248, 251, .66);
}

.page-about .about-rail {
  margin-top: clamp(26px, 4vw, 40px);
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 4px 0 14px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail-card {
  flex: 0 0 clamp(210px, 64vw, 262px);
  scroll-snap-align: start;
  position: relative;
  padding: 18px 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line-dark);
  background: rgba(245, 248, 251, .08);
  overflow: hidden;
}

.page-about .about-rail-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--orange-2));
}

.page-about .about-rail-card h3 {
  margin: 6px 0 0;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .about-rail-card p {
  margin: 8px 0 0;
  font-size: .875rem;
  line-height: 1.68;
  color: rgba(245, 248, 251, .68);
}

/* ---------- 用户服务 ---------- */
.page-about .about-user-stats {
  list-style: none;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

@media (min-width: 820px) {
  .page-about .about-user-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-user-stats li {
  min-width: 0;
  padding: 18px 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .us-num {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--ink-800);
}

.page-about .us-label {
  font-size: .8125rem;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .about-record-panel {
  margin-top: clamp(26px, 4vw, 42px);
  padding: clamp(22px, 3vw, 32px);
  border-radius: var(--radius-lg);
  background: linear-gradient(140deg, rgba(11, 46, 79, .94), rgba(5, 25, 44, .96));
  color: var(--paper);
  border-left: 4px solid var(--neon);
}

.page-about .about-record-panel h3 {
  margin: 0;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .about-record-panel p {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: .9375rem;
  line-height: 1.78;
  color: rgba(245, 248, 251, .76);
}

/* ---------- 行业认可 ---------- */
.page-about .about-honors {
  margin-top: clamp(24px, 4vw, 40px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

@media (min-width: 720px) {
  .page-about .about-honors {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about .about-honor-card {
  min-width: 0;
  padding: 24px 22px 26px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-dark);
  background: rgba(245, 248, 251, .07);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .honor-num {
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--neon);
}

.page-about .honor-label {
  font-size: .9375rem;
  line-height: 1.65;
  color: rgba(245, 248, 251, .72);
}

.page-about .about-closing {
  margin: clamp(26px, 4vw, 40px) 0 0;
  max-width: 64ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: rgba(245, 248, 251, .78);
}

.page-about .about-next {
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: 22px;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-next-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange-2);
}

.page-about .about-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-next-links a {
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-dark);
  color: var(--paper);
  font-size: .875rem;
  line-height: 1.3;
  text-decoration: none;
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .about-next-links a:hover {
  border-color: var(--orange);
  background: rgba(255, 106, 0, .16);
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }
}