.page-about {
  --about-pad: 20px;
  --about-rail: 26px;
  display: block;
  overflow-x: clip;
}

@media (min-width: 640px) {
  .page-about { --about-pad: 28px; }
}

@media (min-width: 1100px) {
  .page-about { --about-pad: 40px; }
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(30px, 4.6vw, 54px) 0 clamp(28px, 4vw, 52px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 130% at 6% -10%, rgba(37, 214, 232, 0.12), transparent 62%),
    radial-gradient(90% 120% at 96% 4%, rgba(242, 193, 78, 0.07), transparent 60%),
    linear-gradient(180deg, var(--void-2) 0%, var(--void) 100%);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(18px, 2.4vw, 28px);
}

@media (min-width: 940px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7.4fr) minmax(240px, 3.6fr);
    align-items: end;
    gap: clamp(28px, 4vw, 56px);
  }
}

.page-about .about-h1 {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(29px, 4.9vw, 54px);
  line-height: 1.07;
  letter-spacing: -0.012em;
  color: var(--ink);
  margin: 14px 0 18px;
  max-width: 20ch;
}

.page-about .about-lede {
  font-size: clamp(15.5px, 1.5vw, 17px);
  line-height: 1.78;
  color: rgba(232, 237, 249, 0.8);
  margin: 0;
}

.page-about .about-hero .exhibit {
  margin: 0;
}

.page-about .about-hero__note {
  border-left: 2px solid var(--cyan);
  padding: 4px 0 4px 16px;
  background: linear-gradient(90deg, rgba(37, 214, 232, 0.08), transparent 78%);
}

.page-about .about-hero__notetext {
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
  margin: 0 0 10px;
}

.page-about .about-hero__notemeta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--gold);
  margin: 0;
}

/* 首屏数据条 */

.page-about .about-facts {
  list-style: none;
  margin: clamp(26px, 3.4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 760px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-fact {
  background: var(--void-2);
  padding: 15px 16px 17px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(21px, 2.5vw, 29px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--green);
}

.page-about .about-fact__label {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 主流程容器与时间线 ---------- */

.page-about .about-flow {
  position: relative;
  max-width: var(--content);
  margin: 0 auto;
  padding: clamp(38px, 5vw, 64px) var(--about-pad) 0;
}

.page-about .about-flow::before {
  content: "";
  position: absolute;
  top: clamp(38px, 5vw, 64px);
  bottom: 8px;
  left: calc(var(--about-pad) + 6px);
  width: 2px;
  opacity: 0.62;
  background: linear-gradient(
    180deg,
    var(--cyan) 0%,
    rgba(37, 214, 232, 0.35) 22%,
    var(--line) 58%,
    var(--gold) 100%
  );
}

.page-about .about-sec {
  position: relative;
  padding-bottom: clamp(40px, 5vw, 70px);
}

.page-about .about-sec--last {
  padding-bottom: clamp(28px, 3.5vw, 48px);
}

.page-about .about-sec__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding-left: var(--about-rail);
}

@media (min-width: 900px) {
  .page-about .about-sec__grid {
    grid-template-columns: minmax(132px, 178px) minmax(0, 1fr);
    gap: 0 34px;
    align-items: start;
  }
}

.page-about .about-mark {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 22px;
}

@media (min-width: 900px) {
  .page-about .about-mark {
    align-items: flex-start;
    padding-top: 6px;
  }
}

.page-about .about-mark__dot {
  position: absolute;
  left: calc(-1 * var(--about-rail) - 1px);
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--void);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(6, 10, 24, 0.95);
}

.page-about .about-sec:nth-child(2n) .about-mark__dot {
  border-color: var(--gold);
}

.page-about .about-mark__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  border: 1px solid var(--line);
  background: var(--void);
  padding: 4px 9px;
  line-height: 1;
  white-space: nowrap;
}

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

.page-about .about-h2 {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(21px, 3vw, 33px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 16px;
  max-width: 24ch;
}

.page-about .about-sec__body p {
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(232, 237, 249, 0.8);
  margin: 0 0 14px;
  max-width: 72ch;
}

.page-about .about-note {
  font-family: var(--font-serif);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 14px;
  margin-top: 20px !important;
  max-width: 68ch;
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  margin: clamp(20px, 2.6vw, 30px) 0 clamp(22px, 2.8vw, 32px);
  border: 1px solid var(--line);
  background: var(--void-2);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

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

.page-about .about-figure figcaption {
  font-family: var(--font-serif);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
  padding: 10px 14px 11px;
}

/* ---------- 校验步骤 ---------- */

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

.page-about .about-step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 15px 0 16px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-step__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cyan);
  line-height: 1.7;
}

.page-about .about-step__title {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 5px;
  line-height: 1.4;
}

.page-about .about-step__content p {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
  max-width: 66ch;
}

/* ---------- 团队卡片 ---------- */

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 6px;
}

@media (min-width: 660px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-team__card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--cyan);
  padding: 20px 18px 22px;
  display: flex;
  flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.page-about .about-team__card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.45);
  border-color: var(--cyan);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-team__unit {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin: 6px 0 14px;
}

.page-about .about-team__title {
  font-family: var(--font-sans);
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 8px;
  line-height: 1.4;
}

.page-about .about-team__card p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
  margin: 0;
  max-width: none;
}

/* ---------- 版本卡片 ---------- */

.page-about .about-versions {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

@media (min-width: 640px) {
  .page-about .about-versions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .page-about .about-versions {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-ver {
  background: var(--void-2);
  border: 1px solid var(--line);
  padding: 17px 16px 19px;
  display: flex;
  flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.page-about .about-ver:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.45);
  border-color: var(--cyan);
}

.page-about .about-ver__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--void);
  background: var(--cyan);
  padding: 3px 8px;
  align-self: flex-start;
  line-height: 1.4;
}

.page-about .about-ver__name {
  font-family: var(--font-sans);
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
  margin: 14px 0 8px;
  line-height: 1.42;
}

.page-about .about-ver p {
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--muted);
  margin: 0;
  max-width: none;
}

.page-about .about-ver--current {
  border-color: rgba(242, 193, 78, 0.55);
  background: linear-gradient(180deg, rgba(242, 193, 78, 0.08), var(--void-2) 68%);
}

.page-about .about-ver--current .about-ver__tag {
  background: var(--green);
}

.page-about .about-ver--current .about-ver__name {
  color: var(--gold);
}

/* ---------- 旧版栏目标签 ---------- */

.page-about .about-index {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(158px, 1fr));
  gap: 10px;
  margin-top: 6px;
}

.page-about .about-index__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 14px 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  text-decoration: none;
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.page-about .about-index__item:hover,
.page-about .about-index__item:focus-visible {
  border-color: var(--cyan);
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.45);
  outline: none;
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  line-height: 1;
}

.page-about .about-index__name {
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}

/* ---------- 备案信息表 ---------- */

.page-about .about-filing {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 700px) {
  .page-about .about-filing {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-filing__row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-filing__k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
  flex: 0 0 auto;
}

.page-about .about-filing__v {
  margin: 0;
  font-size: 14.5px;
  color: var(--ink);
  line-height: 1.6;
  word-break: break-word;
}

.page-about .about-filing__v a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 214, 232, 0.4);
}

.page-about .about-filing__v a:hover,
.page-about .about-filing__v a:focus-visible {
  border-bottom-color: var(--cyan);
  outline: none;
}

/* ---------- 收尾按钮 ---------- */

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.4vw, 28px);
}

@media (max-width: 480px) {
  .page-about .about-cta .btn {
    flex: 1 1 100%;
    text-align: center;
  }
}

/* ---------- 窄屏修正 ---------- */

@media (max-width: 640px) {
  .page-about .about-flow::before {
    bottom: 4px;
  }

  .page-about .about-h2 {
    max-width: none;
  }

  .page-about .about-h1 {
    max-width: none;
  }

  .page-about .about-figure {
    box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.45);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__card,
  .page-about .about-ver,
  .page-about .about-index__item {
    transition: none;
  }

  .page-about .about-team__card:hover,
  .page-about .about-ver:hover,
  .page-about .about-index__item:hover,
  .page-about .about-index__item:focus-visible {
    transform: none;
  }
}
<<<END>>>