.page-about {
  --about-cut: 20px;
  --about-index-col: 208px;
  --about-gap: clamp(24px, 4vw, 40px);
  --about-line: #233064;
  background-color: var(--ink-900);
  color: var(--white);
  overflow-x: clip;
}

/* ============ 首屏 ============ */
.page-about__hero {
  position: relative;
  padding-block: clamp(20px, 3vw, 34px) clamp(48px, 6vw, 80px);
  background:
    radial-gradient(120% 90% at 88% 4%, rgba(53, 208, 232, 0.18), transparent 58%),
    radial-gradient(100% 80% at 4% 96%, rgba(43, 224, 138, 0.13), transparent 62%);
}

.page-about__hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan) 35%, var(--green) 60%, transparent);
  opacity: 0.55;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--about-line) 22%, rgba(53, 208, 232, 0.5) 50%, var(--about-line) 78%, transparent);
}

.page-about__hero .breadcrumbs {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about__hero-grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: center;
}

@media (min-width: 980px) {
  .page-about__hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: clamp(36px, 5vw, 72px);
  }
}

.page-about__kicker {
  display: block;
  margin: 0 0 14px;
  color: var(--cyan);
}

.page-about__title {
  margin: 0 0 18px;
  font-family: var(--font-sans);
  font-size: clamp(28px, 4.4vw, 50px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.012em;
}

.page-about__lead {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 40em;
  font-size: clamp(16px, 1.1vw, 18px);
  line-height: 1.78;
  color: var(--mist);
}

.page-about__hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 1px;
  margin: 0 0 clamp(24px, 3vw, 34px);
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about__hero-stats > div {
  padding: 14px 14px 12px;
  background: var(--ink-900);
}

.page-about__fact-num {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--lemon);
}

.page-about__fact-lab {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about__hero-media {
  position: relative;
  width: 100%;
  box-shadow: 0 26px 60px -34px rgba(53, 208, 232, 0.55);
}

.page-about__hero-media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ============ 主体骨架 ============ */
.page-about__body {
  padding-block: clamp(40px, 6vw, 80px);
}

.page-about__body-grid {
  display: grid;
  gap: clamp(30px, 4vw, 52px);
}

@media (min-width: 1040px) {
  .page-about__body-grid {
    grid-template-columns: var(--about-index-col) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
    align-items: start;
  }
}

.page-about__index {
  display: none;
}

@media (min-width: 1040px) {
  .page-about__index {
    display: block;
    position: sticky;
    top: 116px;
    align-self: start;
  }
}

.page-about__index-label {
  display: block;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-line);
  color: var(--mist);
}

.page-about__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about__index-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(35, 48, 100, 0.75);
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-about__index-link .mono-label {
  color: var(--cyan);
}

.page-about__index-link:hover,
.page-about__index-link:focus-visible {
  color: var(--white);
  padding-left: 6px;
}

/* ============ 章节通用 ============ */
.page-about__section {
  padding-block: clamp(30px, 4vw, 50px);
  border-top: 1px solid var(--about-line);
  scroll-margin-top: 112px;
}

.page-about__section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about__h2 {
  margin: 0 0 16px;
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.008em;
}

.page-about__h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about__p {
  max-width: 40em;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

@media (min-width: 700px) {
  .page-about__p {
    font-size: 17px;
  }
}

.page-about__note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--green);
  background: rgba(43, 224, 138, 0.07);
  font-size: 15px;
  line-height: 1.75;
  color: var(--white);
}

.page-about__points {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about__points li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--white);
}

.page-about__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 11px;
  height: 2px;
  background: var(--green);
}

/* ============ 赛季演进 ============ */
.page-about__timeline {
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.page-about__node {
  --node-accent: var(--green);
  position: relative;
  padding: 22px 18px 18px;
  background: linear-gradient(165deg, var(--ink-800), #101736);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about__node--b {
  --node-accent: var(--cyan);
}

.page-about__node--c {
  --node-accent: var(--lemon);
}

.page-about__node--d {
  --node-accent: var(--orange);
}

.page-about__node::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 3px;
  background: var(--node-accent);
}

.page-about__node-num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: rgba(247, 226, 76, 0.26);
}

.page-about__node-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about__node-more {
  margin-top: 10px;
  border-top: 1px dashed rgba(35, 48, 100, 0.9);
  padding-top: 10px;
}

.page-about__node-more summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about__node-more summary::-webkit-details-marker {
  display: none;
}

.page-about__node-more summary::before {
  content: "+ ";
}

.page-about__node-more[open] summary::before {
  content: "– ";
}

.page-about__node-more p {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--mist);
}

/* ============ 团队 ============ */
.page-about__teams {
  display: grid;
  gap: 16px;
  margin-top: clamp(22px, 3vw, 32px);
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.page-about__team-card {
  --tc: 18px;
  position: relative;
  padding: 22px 18px 18px;
  background: linear-gradient(160deg, var(--ink-800), #101736);
  outline: none;
  transition: background 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about__team-card--a {
  clip-path: polygon(0 var(--tc), var(--tc) 0, 100% 0, 100% 100%, 0 100%);
}

.page-about__team-card--b {
  clip-path: polygon(0 0, calc(100% - var(--tc)) 0, 100% var(--tc), 100% 100%, 0 100%);
}

.page-about__team-card--c {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--tc)), calc(100% - var(--tc)) 100%, 0 100%);
}

.page-about__team-card--d {
  clip-path: polygon(0 0, 100% 0, 100% 100%, var(--tc) 100%, 0 calc(100% - var(--tc)));
}

.page-about__team-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--green), transparent 72%);
}

.page-about__team-card--b::after {
  background: linear-gradient(90deg, var(--cyan), transparent 72%);
}

.page-about__team-card--c::after {
  background: linear-gradient(90deg, var(--lemon), transparent 72%);
}

.page-about__team-card--d::after {
  background: linear-gradient(90deg, var(--orange), transparent 72%);
}

.page-about__team-card:hover,
.page-about__team-card:focus-within {
  background: linear-gradient(160deg, #1a2450, #101736);
}

.page-about__team-code {
  display: block;
  margin: 0 0 10px;
  color: var(--mist);
}

.page-about__team-line {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--white);
}

.page-about__team-more {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.34s var(--ease);
}

.page-about__team-more > div {
  overflow: hidden;
}

.page-about__team-more p {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(35, 48, 100, 0.9);
  font-size: 13px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about__team-card:hover .page-about__team-more,
.page-about__team-card:focus-within .page-about__team-more {
  grid-template-rows: 1fr;
}

/* ============ 生产与校验 ============ */
.page-about__process-grid {
  display: grid;
  gap: clamp(24px, 3vw, 36px);
  margin-top: clamp(20px, 3vw, 30px);
}

@media (min-width: 900px) {
  .page-about__process-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: clamp(32px, 4vw, 56px);
  }
}

.page-about__steps {
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about__step {
  position: relative;
  counter-increment: step;
  padding: 4px 0 24px 72px;
}

.page-about__step:last-child {
  padding-bottom: 0;
}

.page-about__step::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--lemon);
  background: var(--ink-800);
  border: 1px solid var(--about-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-about__step::after {
  content: "";
  position: absolute;
  left: 23px;
  top: 58px;
  bottom: 8px;
  width: 1px;
  background: repeating-linear-gradient(to bottom, var(--about-line) 0 5px, transparent 5px 11px);
}

.page-about__step:last-child::after {
  display: none;
}

.page-about__step-title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about__step-text {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about__process-media,
.page-about__guangxi-media {
  width: 100%;
}

.page-about__process-media .media-frame__img,
.page-about__guangxi-media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ============ 广西本地 ============ */
.page-about__guangxi-grid {
  display: grid;
  gap: clamp(24px, 3vw, 36px);
  margin-top: clamp(18px, 3vw, 26px);
}

@media (min-width: 900px) {
  .page-about__guangxi-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
    align-items: center;
    gap: clamp(32px, 4vw, 56px);
  }
}

.page-about__mini-stats {
  display: grid;
  gap: 14px;
  margin: clamp(20px, 3vw, 28px) 0 0;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.page-about__mini-stats > div {
  padding: 14px 16px;
  border: 1px solid var(--about-line);
  background: rgba(20, 28, 66, 0.7);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about__mini-num {
  font-family: var(--font-display);
  font-size: clamp(24px, 2.6vw, 30px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--green);
}

.page-about__mini-lab {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ============ 服务能力 ============ */
.page-about__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  margin-top: clamp(20px, 3vw, 30px);
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--ink-900);
}

.page-about__stat-num {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lemon);
}

.page-about__stat:nth-child(3n + 2) .page-about__stat-num {
  color: var(--green);
}

.page-about__stat:nth-child(3n + 3) .page-about__stat-num {
  color: var(--cyan);
}

.page-about__stat-lab {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}

/* ============ 收尾动作区 ============ */
.page-about__cta {
  padding-block: clamp(40px, 6vw, 76px);
  border-top: 1px solid var(--about-line);
  background: radial-gradient(80% 130% at 50% 0%, rgba(255, 106, 43, 0.13), transparent 62%);
}

.page-about__cta-inner {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

@media (min-width: 900px) {
  .page-about__cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: clamp(32px, 5vw, 64px);
  }
}

.page-about__cta .page-about__p {
  margin-bottom: 0;
}

.page-about__cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============ 无障碍与动效降级 ============ */
@media (prefers-reduced-motion: reduce) {
  .page-about__team-more {
    grid-template-rows: 1fr;
    transition: none;
  }

  .page-about__index-link,
  .page-about__team-card {
    transition: none;
  }
}