.page-about,
.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about {
  background: var(--abyss-950);
  color: var(--paper-50);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-about .about-index--ink {
  color: var(--ocean-600);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 24px 0 56px;
  background:
    radial-gradient(120% 100% at 92% -20%, rgba(45, 226, 230, 0.18), transparent 62%),
    linear-gradient(155deg, var(--abyss-900) 0%, var(--abyss-950) 60%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  pointer-events: none;
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate-400);
}

.page-about .about-hero .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero .breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.page-about .about-hero .breadcrumbs li + li::before {
  content: "/";
  color: var(--ocean-600);
}

.page-about .about-hero .breadcrumbs a {
  color: var(--cyan-200);
  text-decoration: none;
}

.page-about .about-hero .breadcrumbs a:hover,
.page-about .about-hero .breadcrumbs a:focus-visible {
  color: var(--cyan-400);
  text-decoration: underline;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--coral-300);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 4.1rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper-50);
}

.page-about .about-hero__text {
  max-width: 34em;
  margin: 0 0 28px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 248, 247, 0.78);
}

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

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 20px;
  list-style: none;
  background: rgba(6, 34, 53, 0.72);
  border: 1px solid rgba(45, 226, 230, 0.22);
  border-radius: var(--radius-lg);
}

.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 12px;
  border-left: 2px solid rgba(45, 226, 230, 0.35);
}

.page-about .about-facts__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 25px;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--cyan-400);
}

.page-about .about-facts__label {
  font-size: 12.5px;
  line-height: 1.4;
  color: var(--slate-400);
}

/* ---------- 通用节奏 ---------- */
.page-about .section {
  padding: 56px 0;
}

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

/* ---------- 起点 ---------- */
.page-about .about-origin {
  background: linear-gradient(180deg, var(--abyss-950), var(--abyss-900));
  border-top: 1px solid rgba(45, 226, 230, 0.12);
}

.page-about .about-origin__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-origin p {
  max-width: 40em;
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 248, 247, 0.78);
}

.page-about .about-origin .section__title {
  margin-top: 0;
}

.page-about .about-points {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-points li {
  position: relative;
  padding-left: 26px;
  font-size: 14.8px;
  line-height: 1.65;
  color: var(--cyan-200);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 12px;
  height: 2px;
  background: var(--coral-500);
}

.page-about .about-origin__figure,
.page-about .about-flow__figure,
.page-about .about-partners__figure {
  margin: 0;
}

.page-about .media {
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(45, 226, 230, 0.22);
}

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

.page-about .media__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate-400);
}

/* ---------- 潮汐时间线 ---------- */
.page-about .about-tide {
  background:
    radial-gradient(90% 70% at 18% 0%, rgba(58, 46, 99, 0.55), transparent 62%),
    var(--abyss-950);
}

.page-about .about-tide__head {
  max-width: 620px;
  margin-bottom: 32px;
}

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

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

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

.page-about .tide__list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan-400), rgba(45, 226, 230, 0.08));
}

.page-about .tide__item {
  position: relative;
  padding-left: 40px;
  margin-bottom: 16px;
}

.page-about .tide__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 18px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--abyss-950);
  border: 2px solid var(--cyan-400);
  box-shadow: 0 0 0 4px rgba(45, 226, 230, 0.12);
}

.page-about .tide__card {
  padding: 14px 16px;
  background: rgba(6, 34, 53, 0.85);
  border: 1px solid rgba(45, 226, 230, 0.2);
  border-radius: var(--radius-md);
  transition: border-color 0.2s var(--ease-tide), background 0.2s var(--ease-tide);
}

.page-about .tide__card[open] {
  border-color: rgba(45, 226, 230, 0.6);
  background: linear-gradient(150deg, var(--ocean-800), var(--abyss-900));
}

.page-about .tide__card > summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  color: var(--paper-50);
}

.page-about .tide__card > summary::-webkit-details-marker {
  display: none;
}

.page-about .tide__card > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan-400);
}

.page-about .tide__card[open] > summary::after {
  content: "\2013";
  color: var(--coral-500);
}

.page-about .tide__year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan-400);
}

.page-about .tide__name {
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.45;
}

.page-about .tide__body {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 248, 247, 0.75);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--paper-50);
  color: var(--ink-900);
}

.page-about .about-team .section__title {
  color: var(--ink-900);
}

.page-about .about-team__head {
  max-width: 660px;
  margin-bottom: 32px;
}

.page-about .about-team__note {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ocean-600);
}

.page-about .team {
  display: grid;
  gap: 18px;
}

.page-about .team__card {
  padding: 22px;
  background: #ffffff;
  border: 1px solid rgba(11, 27, 36, 0.08);
  border-top: 3px solid var(--cyan-400);
  border-radius: var(--radius-lg);
  box-shadow: 0 18px 36px -28px rgba(11, 27, 36, 0.55);
}

.page-about .team__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  color: var(--ink-900);
}

.page-about .team__card p {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(11, 27, 36, 0.72);
}

.page-about .team__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .team__tags li {
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  background: rgba(45, 226, 230, 0.16);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--ocean-600);
}

.page-about .team__aside {
  margin-top: 28px;
  padding: 20px 22px;
  border-radius: var(--radius-md);
  background: linear-gradient(120deg, rgba(45, 226, 230, 0.14), rgba(255, 107, 74, 0.12));
  border: 1px solid rgba(11, 27, 36, 0.08);
}

.page-about .team__aside p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(11, 27, 36, 0.82);
}

/* ---------- 内容流程 ---------- */
.page-about .about-flow {
  background: var(--abyss-950);
}

.page-about .about-flow__grid {
  display: grid;
  gap: 36px;
}

.page-about .flow {
  display: grid;
  gap: 16px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .flow li {
  position: relative;
  padding: 16px 18px 16px 64px;
  border-radius: var(--radius-md);
  background: rgba(10, 58, 82, 0.42);
  border: 1px solid rgba(45, 226, 230, 0.16);
}

.page-about .flow__num {
  position: absolute;
  left: 18px;
  top: 17px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--coral-500);
}

.page-about .flow li h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--paper-50);
}

.page-about .flow li p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(244, 248, 247, 0.72);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  background: linear-gradient(150deg, var(--indigo-700), var(--abyss-900) 72%);
  border-top: 1px solid rgba(45, 226, 230, 0.12);
}

.page-about .about-partners__head {
  max-width: 640px;
  margin-bottom: 32px;
}

.page-about .about-partners__grid {
  display: grid;
  gap: 32px;
}

.page-about .partners {
  display: grid;
  gap: 16px;
}

.page-about .partners__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: rgba(4, 19, 31, 0.45);
  border: 1px solid rgba(45, 226, 230, 0.18);
}

.page-about .partners__num {
  min-width: 76px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 32px;
  line-height: 1;
  color: var(--cyan-400);
}

.page-about .partners__item h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper-50);
}

.page-about .partners__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 248, 247, 0.72);
}

/* ---------- 荣誉 ---------- */
.page-about .about-honor {
  background: linear-gradient(120deg, var(--wine-700), var(--abyss-900) 68%);
}

.page-about .about-honor__grid {
  display: grid;
  gap: 28px;
}

.page-about .honor__text {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 248, 247, 0.78);
}

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

.page-about .honor__list li {
  position: relative;
  padding: 14px 16px 14px 40px;
  border-radius: var(--radius-md);
  background: rgba(4, 19, 31, 0.42);
  border: 1px solid rgba(255, 163, 143, 0.28);
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(244, 248, 247, 0.82);
}

.page-about .honor__list li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 22px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--coral-500);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  background: var(--abyss-900);
  border-top: 1px solid rgba(45, 226, 230, 0.12);
}

.page-about .about-next__inner {
  display: grid;
  gap: 28px;
}

.page-about .about-next p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 248, 247, 0.75);
}

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

.page-about .about-next__links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  border-radius: var(--radius-pill);
  background: rgba(6, 34, 53, 0.8);
  border: 1px solid rgba(45, 226, 230, 0.24);
  color: var(--paper-50);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.18s var(--ease-tide), background 0.18s var(--ease-tide), transform 0.18s var(--ease-tide);
}

.page-about .about-next__links a:hover,
.page-about .about-next__links a:focus-visible {
  border-color: var(--cyan-400);
  background: rgba(10, 58, 82, 0.88);
  transform: translateY(-2px);
}

.page-about .about-next__links span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--cyan-400);
  white-space: nowrap;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .section {
    padding: 72px 0;
  }

  .page-about .about-hero {
    padding-bottom: 72px;
  }

  .page-about .about-hero__text {
    font-size: 16.5px;
  }

  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-facts__num {
    font-size: 28px;
  }

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

  .page-about .about-partners__grid,
  .page-about .about-flow__grid {
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .section {
    padding: 88px 0;
  }

  .page-about .about-hero {
    padding: 32px 0 96px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 24px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .tide__list::before {
    display: none;
  }

  .page-about .tide__wave {
    display: block;
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
  }

  .page-about .tide__list {
    position: relative;
    z-index: 1;
  }

  .page-about .tide__item {
    width: 50%;
    margin-bottom: 26px;
  }

  .page-about .tide__item:nth-child(odd) {
    padding-left: 0;
    padding-right: 56px;
  }

  .page-about .tide__item:nth-child(even) {
    margin-left: 50%;
    padding-left: 56px;
  }

  .page-about .tide__item:nth-child(odd)::before {
    left: auto;
    right: -6px;
  }

  .page-about .tide__item:nth-child(even)::before {
    left: -6px;
  }

  .page-about .team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    align-items: start;
  }

  .page-about .team__card:nth-child(2) {
    margin-top: 32px;
  }

  .page-about .team__card:nth-child(3) {
    margin-top: 64px;
  }

  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .about-honor__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 48px;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tide__card,
  .page-about .about-next__links a {
    transition: none;
  }

  .page-about .about-next__links a:hover,
  .page-about .about-next__links a:focus-visible {
    transform: none;
  }
}