.page-about {
  display: block;
}

/* ===== 页面头部 ===== */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 30px) 0 36px;
  overflow: hidden;
}
.page-about .about-hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 46%;
  height: 100%;
  background: linear-gradient(135deg, transparent 20%, rgba(123, 47, 247, 0.16) 58%, rgba(0, 212, 255, 0.1) 100%);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}
.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
  align-items: center;
  margin-top: 28px;
}
.page-about .about-hero__main {
  min-width: 0;
}
.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}
.page-about .about-hero__eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: currentColor;
  opacity: 0.6;
}
.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-size: clamp(1.9rem, 5.5vw, 3.6rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 14em;
}
.page-about .about-hero__lede {
  max-width: 46em;
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}
.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--bg-surface);
  border: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--text-dim);
  white-space: nowrap;
}
.page-about .about-meta-pill strong {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text);
}
.page-about .about-meta-pill--gold {
  border-color: rgba(229, 184, 11, 0.45);
  background: rgba(229, 184, 11, 0.08);
}
.page-about .about-meta-pill--gold strong {
  color: var(--gold-bright);
}
.page-about .about-hero__aside {
  min-width: 0;
}
.page-about .about-hero__image-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.page-about .about-hero__image-wrap img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-hero__image-wrap::after {
  content: '';
  position: absolute;
  inset: 14px;
  border-radius: calc(var(--radius) - 4px);
  border: 1px solid rgba(229, 184, 11, 0.4);
  pointer-events: none;
}
.page-about .about-hero__badge {
  position: absolute;
  left: 16px;
  bottom: 16px;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(10, 14, 39, 0.88);
  border: 1px solid rgba(229, 184, 11, 0.55);
  color: var(--gold-bright);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  backdrop-filter: blur(4px);
}
.page-about .about-hero__badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 8px rgba(229, 184, 11, 0.9);
}

/* ===== 品牌使命 ===== */
.page-about .about-mission__grid {
  display: grid;
  gap: 32px;
}
.page-about .about-mission__content {
  min-width: 0;
}
.page-about .about-mission__content p {
  margin: 0 0 16px;
  line-height: 1.85;
  color: var(--text-dim);
  font-size: 15px;
}
.page-about .about-mission__content strong {
  color: var(--text);
  font-weight: 600;
}
.page-about .about-mission__quote {
  position: relative;
  margin: 28px 0 24px;
  padding: 24px 24px 20px;
  background: linear-gradient(135deg, rgba(229, 184, 11, 0.09), transparent 70%), var(--bg-card);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: var(--font-head);
  font-size: 22px;
  line-height: 1.55;
  color: var(--text);
}
.page-about .about-mission__quote-mark {
  font-size: 44px;
  line-height: 0;
  vertical-align: -12px;
  margin-right: 6px;
  color: var(--gold);
}
.page-about .about-mission__quote cite {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-style: normal;
  color: var(--text-dim);
}
.page-about .about-mission__aside {
  min-width: 0;
}
.page-about .about-tip {
  position: relative;
  padding: 20px 20px 16px;
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  cursor: help;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.page-about .about-tip:hover,
.page-about .about-tip:focus-within {
  border-color: rgba(0, 212, 255, 0.38);
  box-shadow: var(--shadow-card);
}
.page-about .about-tip__glyph {
  position: absolute;
  top: 16px;
  right: 16px;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.12);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
}
.page-about .about-tip__label {
  margin: 0 0 8px;
  padding-right: 28px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}
.page-about .about-tip__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}
.page-about .about-tip__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}
.page-about .about-tip__detail {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, opacity 0.3s ease, margin-top 0.3s ease, padding-top 0.3s ease;
}
.page-about .about-tip:hover .about-tip__detail,
.page-about .about-tip:focus-within .about-tip__detail {
  max-height: 300px;
  opacity: 1;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}
.page-about .about-note-card {
  margin-top: 16px;
  padding: 18px 20px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(123, 47, 247, 0.13), rgba(0, 212, 255, 0.06)), var(--bg-card);
  border: 1px solid var(--line-soft);
}
.page-about .about-note-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 1;
  color: var(--gold-bright);
}
.page-about .about-note-card__desc {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-dim);
}

/* ===== 更新机制 ===== */
.page-about .section-head--center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}
.page-about .section-head--center .section-desc {
  margin-left: auto;
  margin-right: auto;
}
.page-about .about-updates {
  background:
    radial-gradient(circle at 88% 18%, rgba(123, 47, 247, 0.16), transparent 42%),
    linear-gradient(180deg, rgba(16, 23, 53, 0.55), rgba(16, 23, 53, 0.85));
}
.page-about .about-updates__grid {
  display: grid;
  gap: 32px;
  margin-top: 40px;
}
.page-about .about-updates__copy p {
  margin: 0 0 16px;
  line-height: 1.85;
  color: var(--text-dim);
  font-size: 15px;
}
.page-about .about-updates__copy strong {
  color: var(--text);
  font-weight: 600;
}
.page-about .about-updates__copy .btn {
  margin-top: 8px;
}
.page-about .about-updates__visual {
  display: grid;
  gap: 24px;
}
.page-about .about-update-cycle {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 16px;
  background: rgba(10, 14, 39, 0.55);
  border: 1px solid var(--line-soft);
  border-radius: calc(var(--radius) + 6px);
}
.page-about .about-update-cycle__ring {
  display: none;
}
.page-about .about-update-cycle__core {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  width: 68px;
  height: 68px;
  margin: 0 auto 6px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid rgba(229, 184, 11, 0.5);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  box-shadow: var(--shadow-float);
  flex-shrink: 0;
}
.page-about .about-update-cycle__core svg {
  display: block;
}
.page-about .about-update-cycle__node {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition);
}
.page-about .about-update-cycle__node:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-float);
}
.page-about .about-update-cycle__step {
  min-width: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold);
}
.page-about .about-update-cycle__icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.12);
  color: var(--cyan);
  flex-shrink: 0;
}
.page-about .about-update-cycle__node--2 .about-update-cycle__icon {
  background: rgba(123, 47, 247, 0.16);
  color: #a97bff;
}
.page-about .about-update-cycle__node--1 .about-update-cycle__icon {
  background: rgba(229, 184, 11, 0.14);
  color: var(--gold-bright);
}
.page-about .about-update-cycle__label {
  font-weight: 600;
  font-size: 14px;
  color: var(--text);
}
.page-about .about-updates__figure {
  margin: 0;
}
.page-about .about-updates__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
}
.page-about .about-updates__figure figcaption {
  margin-top: 10px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

/* ===== 发展历程 ===== */
.page-about .about-timeline {
  position: relative;
  margin: 44px 0 0;
  padding: 0 0 0 24px;
  border-left: 1px solid var(--line);
  list-style: none;
}
.page-about .about-timeline__item {
  position: relative;
  margin: 0 0 24px;
  padding-left: 24px;
}
.page-about .about-timeline__item::before {
  content: '';
  position: absolute;
  left: -29px;
  top: 30px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(229, 184, 11, 0.18);
}
.page-about .about-timeline__year {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gold);
}
.page-about .about-timeline__card {
  padding: 18px 20px;
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}
.page-about .about-timeline__card h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}
.page-about .about-timeline__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ===== 服务承诺 ===== */
.page-about .about-promise {
  background: linear-gradient(180deg, rgba(16, 23, 53, 0.35), rgba(10, 14, 39, 0.25) 40%, rgba(16, 23, 53, 0.55));
}
.page-about .about-promise__grid {
  display: grid;
  gap: 16px;
  margin-top: 36px;
}
.page-about .about-promise__item {
  position: relative;
  overflow: hidden;
}
.page-about .about-promise__item::after {
  content: '';
  position: absolute;
  right: -30px;
  top: -30px;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.1), transparent 70%);
  pointer-events: none;
}
.page-about .about-promise__num {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 1;
  color: var(--gold);
}
.page-about .about-promise__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}
.page-about .about-promise__text {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}
.page-about .about-promise__item .tag {
  margin-right: 6px;
}

/* ===== 资质与备案 ===== */
.page-about .about-certification__panel {
  position: relative;
  overflow: hidden;
  border-radius: calc(var(--radius) + 8px);
  border: 1px solid var(--line-soft);
  background: var(--bg-card);
}
.page-about .about-certification__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
}
.page-about .about-certification__content {
  position: relative;
  z-index: 1;
  padding: 32px 20px;
}
.page-about .about-certification__grid {
  display: grid;
  gap: 32px;
  align-items: center;
}
.page-about .about-certification__text p {
  margin: 0 0 14px;
  line-height: 1.85;
  color: var(--text-dim);
  font-size: 15px;
}
.page-about .about-certification__icp {
  color: var(--gold-bright);
  font-family: var(--font-mono);
  font-size: 15px;
  border-bottom: 1px dashed rgba(229, 184, 11, 0.4);
}
.page-about .about-certification__seal-wrap {
  text-align: center;
}
.page-about .about-certification__seal {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 240px;
  height: 240px;
  padding: 20px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 28%, #17204d, #0a0e27 72%);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 6px rgba(229, 184, 11, 0.12), 0 20px 40px rgba(0, 0, 0, 0.4);
  font-family: var(--font-mono);
  color: var(--gold);
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}
.page-about .about-certification__seal::before {
  content: '';
  position: absolute;
  inset: 10px;
  border-radius: 50%;
  border: 1px dashed rgba(229, 184, 11, 0.45);
}
.page-about .about-certification__seal::after {
  content: '';
  position: absolute;
  inset: 14px;
  border-radius: 50%;
  background: repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.07) 0 2px, transparent 2px 9px);
  animation: page-about-seal-scan 5s linear infinite;
  pointer-events: none;
}
.page-about .about-certification__seal-wrap:hover .about-certification__seal,
.page-about .about-certification__seal:focus-within {
  transform: translateY(-2px);
  box-shadow: 0 0 0 10px rgba(229, 184, 11, 0.16), 0 24px 48px rgba(0, 0, 0, 0.5);
}
.page-about .about-certification__seal-top {
  position: relative;
  z-index: 1;
  font-size: 12px;
  letter-spacing: 0.18em;
}
.page-about .about-certification__seal-core {
  position: relative;
  z-index: 1;
  margin: 8px 0 6px;
  font-size: 52px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-bright);
}
.page-about .about-certification__seal-id {
  position: relative;
  z-index: 1;
  max-width: 168px;
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}
.page-about .about-certification__seal-check {
  position: relative;
  z-index: 1;
  margin-top: 6px;
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}
.page-about .about-certification__hint {
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-dim);
}

@keyframes page-about-seal-scan {
  0% {
    background-position: 0 -80px;
    opacity: 0.5;
  }
  50% {
    background-position: 0 80px;
    opacity: 1;
  }
  100% {
    background-position: 0 -80px;
    opacity: 0.5;
  }
}

/* ===== 桌面断点 ===== */
@media (min-width: 768px) {
  .page-about .about-mission__grid {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 48px;
  }
  .page-about .about-mission__aside {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
  }
  .page-about .about-updates__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
    align-items: center;
  }
  .page-about .about-timeline__item:nth-child(even) {
    margin-left: 50%;
  }
  .page-about .about-timeline__item {
    margin-bottom: 32px;
  }
  .page-about .about-certification__content {
    padding: 44px 40px;
  }
  .page-about .about-certification__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 56px;
  }
  .page-about .about-hero__title {
    font-size: clamp(2.4rem, 4.2vw, 4rem);
  }
  .page-about .about-promise__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-updates__visual {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }
  .page-about .about-promise__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-timeline {
    padding: 0;
    border-left: none;
  }
  .page-about .about-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--line);
    transform: translateX(-50%);
  }
  .page-about .about-timeline__item {
    width: 50%;
    padding: 0 44px 0 0;
  }
  .page-about .about-timeline__item::before {
    left: auto;
    right: -5px;
  }
  .page-about .about-timeline__item:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 0 44px;
  }
  .page-about .about-timeline__item:nth-child(even)::before {
    left: -5px;
    right: auto;
  }
  .page-about .about-certification__content {
    padding: 52px 56px;
  }
}

/* ===== 桌面版圆形流程图 ===== */
@media (min-width: 1024px) {
  .page-about .about-update-cycle {
    position: relative;
    display: block;
    width: 320px;
    height: 320px;
    margin: 0 auto;
    padding: 0;
    background: transparent;
    border: none;
  }
  .page-about .about-update-cycle__ring {
    display: block;
    position: absolute;
    inset: 16px;
    border-radius: 50%;
    border: 1px dashed rgba(229, 184, 11, 0.45);
    animation: page-about-cycle-rotate 30s linear infinite;
  }
  .page-about .about-update-cycle__core {
    position: absolute;
    top: 50%;
    left: 50%;
    margin: 0;
    transform: translate(-50%, -50%);
    width: 88px;
    height: 88px;
  }
  .page-about .about-update-cycle__node {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 116px;
    height: 96px;
    padding: 12px 10px;
    text-align: center;
    box-shadow: var(--shadow-card);
  }
  .page-about .about-update-cycle__node:hover {
    transform: translateY(-4px);
  }
  .page-about .about-update-cycle__node--1 {
    top: 2%;
    left: 50%;
    transform: translateX(-50%);
  }
  .page-about .about-update-cycle__node--1:hover {
    transform: translateX(-50%) translateY(-4px);
  }
  .page-about .about-update-cycle__node--2 {
    bottom: 4%;
    left: 0;
  }
  .page-about .about-update-cycle__node--3 {
    bottom: 4%;
    right: 0;
  }
  .page-about .about-update-cycle__icon {
    width: 30px;
    height: 30px;
  }
}

@keyframes page-about-cycle-rotate {
  to {
    transform: rotate(360deg);
  }
}

/* ===== 减少动态效果 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-update-cycle__ring,
  .page-about .about-certification__seal::after {
    animation: none;
  }
  .page-about .about-update-cycle__node,
  .page-about .about-tip,
  .page-about .about-certification__seal {
    transition-duration: 0.01ms;
  }
}