.page-about {
  --about-orbit: 280px;
  overflow-x: hidden;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-body);
}

/* ===== 首屏 Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 56px) 0 72px;
  background:
    radial-gradient(ellipse at 75% 18%, rgba(57, 255, 20, 0.1), transparent 55%),
    linear-gradient(135deg, var(--c-dark) 0%, var(--c-bg) 50%, rgba(94, 18, 36, 0.55) 130%);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-green), transparent 32%, transparent 68%, var(--c-orange));
  opacity: 0.75;
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  align-items: center;
}

.page-about .about-hero__crumbs {
  margin-bottom: 36px;
}

.page-about .about-hero__copy h1 {
  margin: 12px 0 20px;
  max-width: 660px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5vw, 56px);
  line-height: 1.14;
  letter-spacing: 1px;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 560px;
  color: var(--c-ink-dim);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 240px;
}

.page-about .about-hero__orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: var(--about-orbit);
  height: var(--about-orbit);
  border: 1px solid rgba(57, 255, 20, 0.26);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .about-hero__orbit::before {
  content: "";
  position: absolute;
  inset: 22px;
  border: 1px dashed rgba(255, 107, 53, 0.32);
  border-radius: inherit;
}

.page-about .about-hero__year {
  position: relative;
  font-family: var(--font-display);
  font-size: clamp(88px, 16vw, 168px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  color: transparent;
  -webkit-text-stroke: 2px var(--c-green);
  transform: rotate(-12deg);
  user-select: none;
}

.page-about .about-hero__live {
  position: absolute;
  right: 4%;
  bottom: 16%;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(7, 18, 38, 0.86);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--c-ink-dim);
}

.page-about .about-hero__live::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-green);
}

/* ===== 品牌起源 ===== */
.page-about .about-origin,
.page-about .about-team {
  padding: 88px 0;
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

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

.page-about .about-origin__media::before {
  content: "";
  position: absolute;
  bottom: -14px;
  left: -14px;
  width: 68%;
  height: 68%;
  background: linear-gradient(135deg, var(--c-wine), var(--c-indigo));
  clip-path: polygon(0 0, 100% 0, 88% 100%, 0 100%);
  z-index: 0;
}

.page-about .about-origin__media img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  clip-path: polygon(0 0, 100% 0, 100% 90%, 8% 100%, 0 90%);
}

.page-about .about-origin__media figcaption {
  position: relative;
  z-index: 1;
  margin-top: 14px;
  color: var(--c-ink-dim);
  font-size: 13px;
}

.page-about .about-origin__content h2,
.page-about .about-milestones h2,
.page-about .about-cert h2,
.page-about .about-team h2,
.page-about .about-coverage h2 {
  margin: 8px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.22;
  letter-spacing: 0.5px;
}

.page-about .about-origin__content p,
.page-about .about-team__content p {
  margin: 0 0 14px;
  color: var(--c-ink-dim);
  line-height: 1.75;
  max-width: 60ch;
}

.page-about .about-origin__quote {
  margin: 28px 0 0;
  padding: 18px 20px;
  border-left: 3px solid var(--c-green);
  background: var(--c-panel);
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-ink);
}

.page-about .about-origin__quote span {
  display: block;
  margin-top: 8px;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--c-ink-dim);
}

/* ===== 发展里程碑 ===== */
.page-about .about-milestones {
  position: relative;
  padding: 96px 0;
  background:
    linear-gradient(0deg, rgba(59, 31, 94, 0.28), rgba(11, 29, 58, 0.92)),
    var(--c-dark);
  overflow: hidden;
}

.page-about .about-milestones__curve {
  position: absolute;
  top: 96px;
  right: 0;
  width: 62%;
  height: 180px;
  pointer-events: none;
}

.page-about .about-milestones__curve-path {
  fill: none;
  stroke: rgba(57, 255, 20, 0.28);
  stroke-width: 1.5;
  stroke-dasharray: 6 10;
}

.page-about .about-milestones__head,
.page-about .about-coverage__head {
  max-width: 680px;
  margin-bottom: 48px;
}

.page-about .about-milestones__head p,
.page-about .about-coverage__head p {
  color: var(--c-ink-dim);
  line-height: 1.7;
}

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 24px;
  padding-left: 22px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-green), var(--c-line) 60%, var(--c-orange));
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding: 24px 0 8px;
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-timeline__item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .about-timeline__year {
  width: fit-content;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 1;
  background: linear-gradient(90deg, var(--c-green) 0%, rgba(57, 255, 20, 0.22) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  transform: skewX(-12deg);
  transform-origin: left bottom;
}

.page-about .about-timeline__panel {
  position: relative;
  padding: 20px 20px 20px 24px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  transition: border-color var(--ease-out), transform var(--ease-out), box-shadow var(--ease-out);
}

.page-about .about-timeline__panel:hover {
  transform: translateY(-3px);
  border-color: rgba(57, 255, 20, 0.4);
  box-shadow: var(--shadow-panel);
}

.page-about .about-timeline__dot {
  position: absolute;
  left: -21px;
  top: 26px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.14), 0 0 14px rgba(57, 255, 20, 0.55);
}

.page-about .about-timeline__panel h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--c-ink);
}

.page-about .about-timeline__panel p {
  margin: 0;
  color: var(--c-ink-dim);
  font-size: 15px;
  line-height: 1.7;
}

/* ===== 2025品牌认证 ===== */
.page-about .about-cert {
  padding: 96px 0;
  background:
    radial-gradient(circle at 15% 10%, rgba(57, 255, 20, 0.08), transparent 36%),
    linear-gradient(135deg, var(--c-indigo), var(--c-wine));
  color: var(--c-ink);
}

.page-about .about-cert__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.page-about .about-cert__badge {
  position: relative;
  width: min(340px, 80vw);
  margin: 0 auto;
  padding: 14px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  box-shadow: var(--shadow-md);
}

.page-about .about-cert__badge::after {
  content: "";
  position: absolute;
  inset: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), transparent 56%);
  pointer-events: none;
}

.page-about .about-cert__badge img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 50%;
}

.page-about .about-cert__content p {
  color: rgba(232, 240, 248, 0.8);
  line-height: 1.75;
}

.page-about .about-cert__honors {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-cert__honors article {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  align-items: start;
  padding: 18px;
  background: rgba(7, 18, 38, 0.32);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
}

.page-about .about-cert__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(57, 255, 20, 0.1);
  border: 1px solid rgba(57, 255, 20, 0.3);
  color: var(--c-green);
}

.page-about .about-cert__icon svg {
  width: 22px;
  height: 22px;
}

.page-about .about-cert__honors h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
}

.page-about .about-cert__honors p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(232, 240, 248, 0.72);
}

/* ===== 技术与团队 ===== */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  align-items: center;
}

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

.page-about .about-team__media::before {
  content: "";
  position: absolute;
  top: -14px;
  right: -14px;
  width: 62%;
  height: 62%;
  background: linear-gradient(225deg, var(--c-indigo), var(--c-wine));
  clip-path: polygon(8% 0, 100% 0, 100% 100%, 0 92%);
  z-index: 0;
}

.page-about .about-team__media img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  clip-path: polygon(0 0, 92% 0, 100% 100%, 0 100%);
}

.page-about .about-team__note {
  position: relative;
  z-index: 1;
  margin: 12px 0 0;
  color: var(--c-ink-dim);
  font-size: 13px;
  line-height: 1.6;
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-team__stats div {
  padding: 18px 10px;
  background: var(--c-panel);
  border-top: 2px solid var(--c-green);
  text-align: center;
}

.page-about .about-team__stats div:nth-child(2) {
  border-top-color: var(--c-orange);
}

.page-about .about-team__stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1.2;
  color: var(--c-ink);
}

.page-about .about-team__stats span {
  font-size: 13px;
  color: var(--c-ink-dim);
}

/* ===== 服务覆盖范围 ===== */
.page-about .about-coverage {
  padding: 96px 0;
  background:
    linear-gradient(180deg, rgba(7, 18, 38, 0.6), rgba(11, 29, 58, 0.92)),
    repeating-linear-gradient(135deg, rgba(57, 255, 20, 0.03) 0 1px, transparent 1px 14px);
}

.page-about .about-coverage__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.page-about .about-coverage__stats article {
  padding: 30px 18px 26px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  text-align: center;
  transition: transform var(--ease-out), border-color var(--ease-out);
}

.page-about .about-coverage__stats article:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 107, 53, 0.4);
}

.page-about .about-coverage__stats article > span {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 5vw, 58px);
  line-height: 1;
  color: var(--c-green);
}

.page-about .about-coverage__stats article:nth-child(even) > span {
  color: var(--c-orange);
}

.page-about .about-coverage__stats small {
  margin-left: 4px;
  font-size: 0.42em;
  color: inherit;
}

.page-about .about-coverage__stats h3 {
  margin: 14px 0 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-ink);
}

.page-about .about-coverage__stats p {
  margin: 0;
  font-size: 13px;
  color: var(--c-ink-dim);
}

.page-about .about-coverage__foot {
  display: grid;
  gap: 20px;
  margin-top: 44px;
  padding: 24px;
  background: rgba(7, 18, 38, 0.56);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
}

.page-about .about-coverage__foot p {
  margin: 0;
  color: var(--c-ink-dim);
  line-height: 1.75;
}

.page-about .about-coverage__foot a {
  color: var(--c-green);
  text-decoration: none;
}

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

/* ===== 桌面端布局 ===== */
@media (min-width: 980px) {
  .page-about .about-hero__inner {
    grid-template-columns: 7fr 5fr;
    gap: 64px;
  }

  .page-about .about-hero__visual {
    min-height: 320px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
  }

  .page-about .about-origin__content {
    padding-left: 20px;
  }

  .page-about .about-milestones__curve {
    display: block;
  }

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

  .page-about .about-timeline__item {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    padding: 36px 0;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__year {
    order: 2;
    justify-self: end;
    transform-origin: right bottom;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__panel {
    order: 1;
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__year {
    justify-self: start;
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__panel {
    order: 2;
  }

  .page-about .about-timeline__dot {
    left: -10px;
  }

  .page-about .about-cert__grid {
    grid-template-columns: 5fr 7fr;
    gap: 72px;
  }

  .page-about .about-team__grid {
    grid-template-columns: 7fr 5fr;
    gap: 64px;
  }

  .page-about .about-coverage__stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }
}

@media (max-width: 640px) {
  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 40px);
  }

  .page-about .about-hero__year {
    font-size: 76px;
  }

  .page-about .about-hero__live {
    position: static;
    margin-top: 16px;
  }

  .page-about .about-coverage__stats {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-coverage__foot {
    padding: 18px;
  }
}