.page-about {
  --about-line: rgba(201, 216, 228, 0.18);
  --about-line-soft: rgba(201, 216, 228, 0.09);
  --about-glow: rgba(23, 224, 176, 0.14);
  background: var(--oy-deep);
  color: var(--oy-ink);
  font-family: var(--oy-sans);
  overflow-x: clip;
  padding-bottom: 40px;
}

.page-about .oy-section {
  padding: 52px 0;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .oy-section__head {
  position: relative;
  padding-left: 18px;
  max-width: 780px;
}

.page-about .oy-section__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 3px;
  bottom: 3px;
  width: 3px;
  background: linear-gradient(180deg, var(--oy-neon), var(--oy-gold) 62%, var(--oy-signal));
}

.page-about .oy-section__index {
  margin: 0 0 10px;
  font-family: var(--oy-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--oy-gold);
  text-transform: uppercase;
}

.page-about .oy-section__title {
  margin: 0;
  font-size: 26px;
  line-height: 1.24;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .oy-section__lead {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--oy-muted);
  max-width: 60ch;
}

.page-about .oy-media {
  margin: 0;
  position: relative;
}

.page-about .oy-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--about-line);
  border-radius: var(--oy-radius);
}

.page-about .oy-media__caption {
  display: block;
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid var(--oy-gold);
  font-size: 13px;
  line-height: 1.6;
  color: var(--oy-muted);
}

/* ---------- 首屏 ---------- */
.about-hero {
  position: relative;
  padding: 48px 0 46px;
  background:
    radial-gradient(circle at 86% -10%, var(--about-glow), transparent 55%),
    radial-gradient(circle at 2% 40%, rgba(242, 180, 87, 0.11), transparent 46%);
  overflow: hidden;
}

.about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--oy-neon) 0 34%, var(--oy-gold) 34% 62%, var(--oy-signal) 62% 100%);
  opacity: 0.75;
}

.about-hero__label {
  display: inline-block;
  margin: 0;
  padding: 5px 10px;
  border: 1px dashed var(--about-line);
  color: var(--oy-neon);
  font-family: var(--oy-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.about-hero__title {
  margin: 20px 0 0;
  font-size: 32px;
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.025em;
  max-width: 18ch;
}

.about-hero__title em {
  display: block;
  font-style: normal;
  color: var(--oy-neon);
}

.about-hero__lead {
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--oy-ink);
  max-width: 58ch;
  opacity: 0.9;
}

.about-hero__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  padding: 1px;
  background: var(--about-line-soft);
  border: 1px solid var(--about-line-soft);
  list-style: none;
  max-width: 760px;
}

.about-figure {
  background: var(--oy-deep);
  padding: 15px 16px;
}

.about-figure dt {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--oy-muted);
}

.about-figure dd {
  margin: 8px 0 0;
  font-family: var(--oy-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--oy-gold-soft);
  letter-spacing: -0.01em;
}

/* ---------- 01 定位 ---------- */
.about-what__body {
  margin-top: 34px;
  display: grid;
  gap: 30px;
}

.about-what__text p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.82;
}

.about-what__text p:last-child {
  margin-bottom: 0;
}

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

.about-what__item {
  position: relative;
  padding: 18px 0 18px 48px;
  border-top: 1px solid var(--about-line-soft);
}

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

.about-what__num {
  position: absolute;
  left: 0;
  top: 21px;
  font-size: 13px;
  font-weight: 700;
  color: var(--oy-neon);
  letter-spacing: 0.08em;
}

.about-what__item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.about-what__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--oy-muted);
}

/* ---------- 02 时间轴 ---------- */
.about-timeline {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
}

.page-about .oy-timeline__item {
  position: relative;
  padding: 0 0 30px 30px;
  border-left: 1px solid var(--about-line);
}

.page-about .oy-timeline__item:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .oy-timeline__dot {
  position: absolute;
  left: -4.5px;
  top: 5px;
  width: 8px;
  height: 8px;
  background: var(--oy-raise);
  border: 1px solid var(--oy-neon);
  transform: rotate(45deg);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.page-about .oy-timeline__item.is-lit .oy-timeline__dot {
  background: var(--oy-neon);
  box-shadow: 0 0 0 4px rgba(23, 224, 176, 0.16);
}

.page-about .oy-timeline__time {
  display: block;
  font-family: var(--oy-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--oy-gold);
}

.about-timeline__title {
  margin: 8px 0 6px;
  font-size: 18px;
  font-weight: 900;
  letter-spacing: -0.015em;
}

.about-timeline__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--oy-muted);
}

.about-timeline__more {
  display: block;
  margin-top: 10px;
  padding-left: 10px;
  border-left: 2px solid transparent;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--oy-neon-soft);
  transition: border-color 0.25s ease, color 0.25s ease;
}

.page-about .oy-timeline__item:hover .about-timeline__more,
.page-about .oy-timeline__item:focus-within .about-timeline__more {
  border-left-color: var(--oy-neon);
  color: var(--oy-ink);
}

.about-history__media {
  margin-top: 38px;
}

/* ---------- 03 团队 ---------- */
.about-team__media {
  margin-top: 34px;
  position: relative;
}

.about-tabs {
  margin-top: 34px;
}

.page-about .oy-tabs__list {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--about-line);
}

.page-about .oy-tabs__tab {
  appearance: none;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  padding: 12px 16px;
  color: var(--oy-muted);
  font-family: var(--oy-sans);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.page-about .oy-tabs__tab:hover {
  color: var(--oy-ink);
  background: rgba(23, 224, 176, 0.07);
}

.page-about .oy-tabs__tab[aria-selected="true"] {
  color: var(--oy-neon);
  border-bottom-color: var(--oy-neon);
}

.page-about .oy-tabs__tab:focus-visible {
  outline: 2px solid var(--oy-neon);
  outline-offset: -2px;
}

.page-about .oy-tabs__panel {
  padding: 26px 0 0;
}

.about-panel__grid {
  display: grid;
  gap: 22px;
}

.about-panel__kicker {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--oy-gold);
}

.about-panel__title {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

.about-panel__main p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--oy-ink);
  opacity: 0.88;
}

.about-panel__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line-soft);
}

.about-panel__facts li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-line-soft);
  font-size: 14px;
  line-height: 1.65;
  color: var(--oy-muted);
}

.about-panel__facts li .oy-mono {
  flex: 0 0 auto;
  color: var(--oy-neon-soft);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

/* ---------- 04 流程 ---------- */
.about-check__inner {
  position: relative;
}

.about-flow {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
}

.about-flow__step {
  position: relative;
  padding: 0 0 28px 28px;
}

.about-flow__step::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 16px;
  bottom: 0;
  width: 1px;
  background: var(--about-line);
}

.about-flow__step:last-child::after {
  display: none;
}

.about-flow__step::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 5px;
  width: 7px;
  height: 7px;
  background: var(--oy-gold);
  transform: rotate(45deg);
}

.about-flow__step:last-child {
  padding-bottom: 0;
}

.about-flow__kicker {
  margin: 0 0 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--oy-neon);
}

.about-flow__step h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.about-flow__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--oy-muted);
  max-width: 56ch;
}

.about-check__media {
  margin-top: 36px;
}

/* ---------- 05 使用场景 ---------- */
.about-scenes {
  margin-top: 34px;
  display: grid;
  gap: 18px;
}

.page-about .about-scene {
  background: var(--oy-layer);
  border: 1px solid var(--about-line-soft);
  border-radius: var(--oy-radius);
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-scene:hover {
  border-color: var(--oy-neon);
  transform: translateY(-3px);
  box-shadow: var(--oy-shadow);
}

.page-about .about-scene .oy-card__body {
  padding: 22px 20px;
}

.about-scene__tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 8px;
  background: var(--oy-raise);
  color: var(--oy-gold-soft);
  font-family: var(--oy-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.page-about .about-scene .oy-card__title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 900;
  line-height: 1.36;
  letter-spacing: -0.015em;
}

.about-scene__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--oy-muted);
}

.page-about .about-scene .oy-card__meta {
  margin: 14px 0 0;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--oy-muted);
}

.about-scene__link {
  display: inline-block;
  margin-top: 16px;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--oy-neon);
  color: var(--oy-neon);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.about-scene__link:hover,
.about-scene__link:focus-visible {
  color: var(--oy-neon-soft);
  border-bottom-color: var(--oy-neon-soft);
}

/* ---------- 06 一起做 ---------- */
.about-partner__grid {
  margin-top: 34px;
  display: grid;
  gap: 1px;
  background: var(--about-line-soft);
  border: 1px solid var(--about-line-soft);
}

.about-partner__col {
  background: var(--oy-deep);
  padding: 22px 20px;
}

.about-partner__kicker {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--oy-gold);
}

.about-partner__col h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.about-partner__col p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--oy-muted);
}

.about-partner__foot {
  margin-top: 28px;
  display: grid;
  gap: 20px;
}

.page-about .about-partner__note {
  margin: 0;
  padding: 16px 18px;
  border-left: 3px solid var(--oy-gold);
  background: rgba(243, 217, 164, 0.09);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--oy-gold-soft);
}

.about-partner__cta {
  justify-self: start;
}

/* ---------- 中等屏 ---------- */
@media (min-width: 760px) {
  .page-about .oy-section {
    padding: 66px 0;
  }

  .about-hero {
    padding: 64px 0 58px;
  }

  .about-hero__title {
    font-size: 42px;
  }

  .about-hero__lead {
    font-size: 17px;
  }

  .about-figure dd {
    font-size: 26px;
  }

  .about-what__body {
    grid-template-columns: 1fr 1.1fr;
    gap: 44px;
    align-items: start;
  }

  .about-panel__grid {
    grid-template-columns: 1.25fr 1fr;
    gap: 38px;
    align-items: start;
  }

  .about-scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .about-partner__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .about-partner__foot {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 32px;
  }

  .about-flow {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 36px;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-about .oy-section {
    padding: 82px 0;
  }

  .page-about .oy-section__title {
    font-size: 34px;
  }

  .about-hero {
    padding: 78px 0 68px;
  }

  .about-hero__title {
    font-size: 56px;
    max-width: 22ch;
  }

  .about-hero__title em {
    display: inline;
  }

  .about-hero__figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 44px;
  }

  .about-timeline {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 48px;
    border-top: 1px solid var(--about-line);
  }

  .page-about .oy-timeline__item {
    padding: 26px 22px 6px 0;
    border-left: 0;
    border-right: 1px solid var(--about-line-soft);
  }

  .page-about .oy-timeline__item:last-child {
    border-right: 0;
    padding-right: 0;
  }

  .page-about .oy-timeline__dot {
    left: 0;
    top: -4.5px;
  }

  .about-timeline__desc {
    max-width: 30ch;
  }

  .about-scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
    align-items: start;
  }

  .about-scenes > :nth-child(2) {
    margin-top: 28px;
  }

  .about-check__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "head flow"
      "media flow";
    gap: 38px 56px;
    align-items: start;
  }

  .about-check__inner .oy-section__head {
    grid-area: head;
  }

  .about-check__inner .about-flow {
    grid-area: flow;
    margin-top: 0;
  }

  .about-check__inner .about-check__media {
    grid-area: media;
    margin-top: 0;
  }

  .about-partner__col {
    padding: 26px 24px;
  }

  .about-partner__col:nth-child(2) {
    background: var(--oy-layer);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-scene,
  .page-about .oy-timeline__dot,
  .about-timeline__more,
  .about-scene__link,
  .page-about .oy-tabs__tab {
    transition: none;
  }

  .page-about .about-scene:hover {
    transform: none;
  }
}