.page-about {
  --about-rule: rgba(168, 255, 240, 0.16);
  --about-rule-soft: rgba(168, 255, 240, 0.08);
  --about-surface: rgba(11, 58, 50, 0.72);
  --about-surface-deep: rgba(6, 35, 31, 0.9);
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .about-crumbs {
  padding-top: clamp(14px, 3vw, 26px);
}

/* ---------- 封面 ---------- */
.page-about .about-cover {
  position: relative;
  padding: clamp(20px, 4vw, 44px) 0 clamp(38px, 6vw, 80px);
  overflow: hidden;
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -22%;
  width: min(620px, 78vw);
  aspect-ratio: 1;
  background: radial-gradient(circle at 50% 50%, rgba(57, 242, 208, 0.2), rgba(57, 242, 208, 0) 64%);
  pointer-events: none;
}

.page-about .about-cover::after {
  content: "XL-09";
  position: absolute;
  left: 0;
  bottom: -0.16em;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(4rem, 16vw, 11rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: rgba(168, 255, 240, 0.05);
  pointer-events: none;
  user-select: none;
}

.page-about .about-cover__grid {
  position: relative;
  display: grid;
  gap: clamp(26px, 5vw, 44px);
  align-items: start;
}

.page-about .about-cover h1 {
  margin: 0.35em 0 0.5em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7.6vw, 4.1rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-cover__mark {
  color: var(--cyan);
  display: inline;
}

.page-about .about-cover__text {
  max-width: 56ch;
  margin: 0;
  font-size: clamp(1rem, 2.5vw, 1.075rem);
  line-height: 1.78;
  color: rgba(246, 241, 231, 0.82);
}

.page-about .about-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-meta__item dt {
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--sage);
}

.page-about .about-meta__item dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-cover__figure {
  margin: 0;
  border-radius: var(--radius-organic);
  overflow: hidden;
  box-shadow: 0 22px 60px rgba(2, 16, 14, 0.6);
}

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

/* ---------- 主栅格与侧栏 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
  padding-bottom: clamp(40px, 7vw, 88px);
}

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

.page-about .about-side {
  min-width: 0;
  order: -1;
}

.page-about .about-side__sticky {
  padding: 20px 22px;
  border: 1px solid var(--about-rule);
  border-radius: 4px 20px 4px 20px;
  background: linear-gradient(150deg, rgba(11, 58, 50, 0.86), rgba(2, 16, 14, 0.9));
}

.page-about .about-side__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--magenta);
  text-transform: uppercase;
}

.page-about .about-side__nav {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .about-side__nav a {
  display: block;
  padding: 7px 0;
  font-size: 0.9rem;
  color: rgba(246, 241, 231, 0.78);
  text-decoration: none;
  border-bottom: 1px dashed var(--about-rule-soft);
  transition: color 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.page-about .about-side__nav a:hover,
.page-about .about-side__nav a:focus-visible {
  color: var(--cyan);
  padding-left: 8px;
}

.page-about .about-side__meta {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--about-rule);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.7;
  color: var(--sage);
}

.page-about .about-side .note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 章节头 ---------- */
.page-about .about-block {
  position: relative;
  padding-top: clamp(30px, 5vw, 52px);
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-block:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-head {
  margin-bottom: clamp(22px, 4vw, 34px);
}

.page-about .about-head h2 {
  margin: 0.3em 0 0.4em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .about-head__note {
  margin: 0;
  max-width: 56ch;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--sage);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  padding-left: 20px;
}

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

.page-about .tl {
  position: relative;
  z-index: 1;
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .tl__item {
  position: relative;
  padding-left: 30px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(57, 242, 208, 0.12);
  z-index: 2;
}

.page-about .tl__item--now::before {
  border-color: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 177, 59, 0.16);
}

.page-about .tl__details {
  border: 1px solid var(--about-rule);
  border-radius: 18px 4px 18px 4px;
  background: linear-gradient(158deg, var(--about-surface), var(--about-surface-deep));
  overflow: hidden;
  transition: border-color 0.3s var(--ease);
}

.page-about .tl__details[open] {
  border-color: rgba(57, 242, 208, 0.42);
}

.page-about .tl__summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 16px;
  cursor: pointer;
  list-style: none;
}

.page-about .tl__summary::-webkit-details-marker {
  display: none;
}

.page-about .tl__summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-about .tl__num {
  flex: 0 0 auto;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--magenta);
  padding-top: 2px;
}

.page-about .tl__head {
  flex: 1 1 auto;
  min-width: 0;
  display: grid;
  gap: 5px;
}

.page-about .tl__phase {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--sage);
}

.page-about .tl__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.08rem;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .tl__cue {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 3px;
}

.page-about .tl__cue::before,
.page-about .tl__cue::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.page-about .tl__cue::before {
  left: 0;
  top: 8px;
  width: 18px;
  height: 2px;
}

.page-about .tl__cue::after {
  left: 8px;
  top: 0;
  width: 2px;
  height: 18px;
}

.page-about .tl__details[open] .tl__cue::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-about .tl__panel {
  padding: 0 16px 20px 16px;
  border-top: 1px solid var(--about-rule-soft);
  padding-top: 14px;
}

.page-about .tl__panel p {
  margin: 0 0 12px;
  font-size: 0.95rem;
  line-height: 1.78;
  color: rgba(246, 241, 231, 0.8);
}

.page-about .tl__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .tl__list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--sage);
}

.page-about .tl__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--cyan);
  opacity: 0.7;
}

/* ---------- 本地服务版图 ---------- */
.page-about .about-map__grid {
  display: grid;
  gap: clamp(24px, 4vw, 38px);
}

.page-about .about-map__text {
  margin: 0 0 22px;
  font-size: 0.98rem;
  line-height: 1.82;
  color: rgba(246, 241, 231, 0.82);
}

.page-about .about-dots {
  display: grid;
  gap: 14px;
  padding: 20px 18px;
  border-radius: 4px 24px 4px 24px;
  background: linear-gradient(135deg, rgba(16, 46, 40, 0.9), rgba(6, 35, 31, 0.6));
  border: 1px solid var(--about-rule-soft);
}

.page-about .about-dots__group {
  display: grid;
  gap: 8px;
  cursor: default;
}

.page-about .about-dots__label {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--sage);
}

.page-about .about-dots__grid {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.page-about .about-dots__grid i {
  width: 14px;
  height: 14px;
  border-radius: 50% 50% 50% 4px;
  background: rgba(57, 242, 208, 0.72);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-dots__group:hover .about-dots__grid i,
.page-about .about-dots__group:focus-within .about-dots__grid i {
  background: rgba(255, 177, 59, 0.9);
  transform: translateY(-2px);
}

.page-about .about-map__foot {
  margin: 18px 0 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--sage);
}

.page-about .about-map__aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-map__figure {
  margin: 0;
  border-radius: var(--radius-organic);
  overflow: hidden;
}

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

/* ---------- 收费三级 ---------- */
.page-about .fees {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
}

.page-about .fee {
  display: grid;
  gap: 8px;
  padding: 22px 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .fee:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .fee__num {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: 0.06em;
}

.page-about .fee__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--paper);
}

.page-about .fee__text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(246, 241, 231, 0.78);
}

.page-about .about-fees__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 段位 ---------- */
.page-about .ranks {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .rank {
  display: grid;
  gap: 8px;
  padding: 16px 16px 16px 18px;
  border-left: 3px solid rgba(57, 242, 208, 0.45);
  border-radius: 0 14px 14px 0;
  background: linear-gradient(90deg, rgba(11, 58, 50, 0.8), rgba(11, 58, 50, 0));
}

.page-about .rank--top {
  border-left-color: var(--amber);
  background: linear-gradient(90deg, rgba(255, 177, 59, 0.12), rgba(11, 58, 50, 0));
}

.page-about .rank__tag {
  justify-self: start;
}

.page-about .rank__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(246, 241, 231, 0.8);
}

/* ---------- 团队与合作 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(22px, 4vw, 34px);
  align-items: start;
}

.page-about .about-team__body p {
  margin: 0 0 14px;
  font-size: 0.96rem;
  line-height: 1.82;
  color: rgba(246, 241, 231, 0.82);
}

.page-about .about-team__list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-team__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 14px;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--sage);
  border: 1px solid var(--about-rule-soft);
  border-radius: 2px 14px 2px 14px;
  background: rgba(16, 46, 40, 0.5);
}

.page-about .about-team__list .num {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: 24px 4px 24px 4px;
  overflow: hidden;
}

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

/* ---------- 使用记录 ---------- */
.page-about .about-records__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

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

.page-about .about-records__item {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-records__when {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--magenta);
}

.page-about .about-records__what {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: rgba(246, 241, 231, 0.8);
}

.page-about .about-records__more {
  margin: 24px 0 0;
}

/* ---------- 收束 ---------- */
.page-about .about-close {
  margin-top: clamp(34px, 6vw, 60px);
  padding: clamp(26px, 5vw, 44px);
  border-radius: 28px 6px 28px 6px;
  background:
    radial-gradient(circle at 88% 12%, rgba(255, 61, 139, 0.22), rgba(255, 61, 139, 0) 58%),
    linear-gradient(150deg, rgba(11, 58, 50, 0.95), rgba(2, 16, 14, 0.98));
  border: 1px solid var(--about-rule);
}

.page-about .about-close h2 {
  margin: 0.3em 0 0.4em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.45rem, 5vw, 2.2rem);
  line-height: 1.22;
}

.page-about .about-close__text {
  margin: 0;
  max-width: 52ch;
  font-size: 0.96rem;
  line-height: 1.8;
  color: rgba(246, 241, 231, 0.8);
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

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

  .page-about .fee {
    grid-template-columns: 54px minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 20px;
    align-items: start;
  }

  .page-about .fee__num {
    padding-top: 6px;
  }

  .page-about .rank {
    grid-template-columns: 118px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

  .page-about .about-records__item {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(36px, 4vw, 60px);
    align-items: center;
  }

  .page-about .about-side {
    order: 0;
  }

  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) minmax(220px, 268px);
    align-items: start;
  }

  .page-about .about-side__sticky {
    position: sticky;
    top: 28px;
  }

  .page-about .about-timeline {
    padding-left: 30px;
  }

  .page-about .about-timeline__spine {
    display: block;
    position: absolute;
    left: 0;
    top: 6px;
    width: 40px;
    height: calc(100% - 40px);
  }

  .page-about .tl__item {
    padding-left: 34px;
  }

  .page-about .tl__item::before {
    left: -2px;
    top: 28px;
  }

  .page-about .tl__summary {
    padding: 22px 24px;
  }

  .page-about .tl__title {
    font-size: 1.18rem;
  }

  .page-about .tl__panel {
    padding: 16px 24px 24px 24px;
  }

  .page-about .about-map__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    align-items: center;
  }

  .page-about .about-dots {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    padding: 24px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-dots__grid i,
  .page-about .tl__details,
  .page-about .about-side__nav a {
    transition: none;
  }

  .page-about .about-dots__group:hover .about-dots__grid i {
    transform: none;
  }
}
<<<END>>>