.page-about {
  --about-gap: clamp(52px, 8vw, 104px);
}

/* ---------- 品牌自述首屏 ---------- */
.page-about .about-intro {
  position: relative;
  padding: clamp(26px, 5vw, 48px) 0 clamp(44px, 7vw, 78px);
  background:
    radial-gradient(120% 70% at 88% -10%, rgba(198, 255, 61, .10), transparent 58%),
    radial-gradient(90% 60% at 0% 110%, rgba(62, 142, 255, .08), transparent 60%),
    linear-gradient(180deg, var(--deep) 0%, var(--deep-2) 100%);
  border-bottom: 1px solid var(--deep-line);
}

.page-about .about-intro .breadcrumb {
  margin-bottom: clamp(20px, 4vw, 34px);
}

.page-about .about-intro h1 {
  font-size: clamp(32px, 6.2vw, 64px);
  line-height: 1.08;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--mist);
  max-width: 20ch;
  margin: 12px 0 20px;
}

.page-about .about-intro .lead {
  max-width: 64ch;
  margin: 0;
  color: rgba(232, 237, 233, .86);
  font-size: clamp(15px, 1.3vw, 18px);
  line-height: 1.72;
}

.page-about .about-intro__tags {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin {
  padding: var(--about-gap) 0;
  background: linear-gradient(180deg, var(--deep-2) 0%, var(--deep) 100%);
}

.page-about .about-origin__inner {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .about-origin h2 {
  font-size: clamp(25px, 3.6vw, 40px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--mist);
  margin: 10px 0 18px;
  max-width: 22ch;
}

.page-about .about-origin__text > p {
  margin: 0 0 16px;
  color: rgba(232, 237, 233, .8);
  line-height: 1.76;
  max-width: 62ch;
}

.page-about .about-origin__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-origin__list li {
  display: grid;
  gap: 6px;
  padding: 14px 18px;
  border: 1px solid var(--deep-line);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, .025);
  transition: border-color .3s var(--ease), background .3s var(--ease);
}

.page-about .about-origin__list li:hover {
  border-color: rgba(198, 255, 61, .35);
  background: rgba(198, 255, 61, .04);
}

.page-about .about-origin__k {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--lime);
}

.page-about .about-origin__v {
  font-size: 14.5px;
  line-height: 1.68;
  color: rgba(232, 237, 233, .78);
}

.page-about .about-origin__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--deep-line);
}

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

/* ---------- 数据标注体系（暖纸面板） ---------- */
.page-about .about-method {
  padding: var(--about-gap) 0;
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-method h2 {
  font-size: clamp(25px, 3.6vw, 40px);
  line-height: 1.16;
  color: var(--ink);
  margin: 10px 0 18px;
  max-width: 24ch;
}

.page-about .about-method__head > p:last-child {
  margin: 0;
  max-width: 64ch;
  color: var(--ink-2);
  line-height: 1.76;
}

.page-about .about-method__grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-method__block {
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--r-lg);
  border: 1px solid var(--paper-line);
  background: var(--paper-2);
}

.page-about .about-method__block h3 {
  margin: 0 0 16px;
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--ink);
}

.page-about .about-field-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-field-list li {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .02em;
  padding: 8px 15px;
  border-radius: var(--pill);
  background: var(--deep);
  color: var(--lime);
}

.page-about .about-rhythm {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-rhythm li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--paper-line);
  font-size: 14.5px;
  color: var(--ink-2);
}

.page-about .about-rhythm li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-rhythm b {
  font-family: var(--font-mono);
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

.page-about .about-method__media {
  margin: clamp(28px, 4vw, 48px) 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--paper-line);
}

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

/* ---------- 赛季手册与版本迭代 ---------- */
.page-about .about-handbook {
  padding: var(--about-gap) 0;
  background:
    radial-gradient(90% 60% at 8% 0%, rgba(242, 184, 75, .08), transparent 58%),
    var(--deep);
}

.page-about .about-handbook h2 {
  font-size: clamp(25px, 3.6vw, 40px);
  line-height: 1.16;
  color: var(--mist);
  margin: 10px 0 18px;
  max-width: 26ch;
}

.page-about .about-handbook__head > p:last-child {
  margin: 0;
  max-width: 64ch;
  color: rgba(232, 237, 233, .8);
  line-height: 1.76;
}

.page-about .about-timeline {
  list-style: none;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 36px 22px 24px;
  border-radius: var(--r-lg);
  border: 1px solid var(--deep-line);
  background: var(--deep-2);
  transition: transform .35s var(--ease), border-color .35s var(--ease);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 255, 61, .14);
  transition: box-shadow .35s var(--ease);
}

.page-about .about-timeline__item:nth-child(2)::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(242, 184, 75, .14);
}

.page-about .about-timeline__item:nth-child(3)::before {
  background: var(--blue);
  box-shadow: 0 0 0 4px rgba(62, 142, 255, .14);
}

.page-about .about-timeline__item:nth-child(4)::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(127, 231, 208, .14);
}

.page-about .about-timeline__item:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, .16);
}

.page-about .about-timeline__ver {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .09em;
  padding: 4px 11px;
  border-radius: var(--pill);
  background: rgba(198, 255, 61, .12);
  color: var(--lime);
  margin-bottom: 12px;
}

.page-about .about-timeline__item:nth-child(2) .about-timeline__ver {
  background: rgba(242, 184, 75, .14);
  color: var(--amber);
}

.page-about .about-timeline__item:nth-child(3) .about-timeline__ver {
  background: rgba(62, 142, 255, .16);
  color: #9CC6FF;
}

.page-about .about-timeline__item:nth-child(4) .about-timeline__ver {
  background: rgba(127, 231, 208, .14);
  color: var(--cyan);
}

.page-about .about-timeline__item h3 {
  margin: 0 0 10px;
  font-size: 17px;
  letter-spacing: -.005em;
  color: var(--mist);
}

.page-about .about-timeline__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(232, 237, 233, .76);
}

.page-about .about-handbook__media {
  margin: clamp(28px, 4vw, 48px) 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--deep-line);
}

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

.page-about .about-handbook__toc {
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--r-lg);
  border: 1px solid var(--deep-line);
  background: rgba(255, 255, 255, .025);
}

.page-about .about-handbook__toc h3 {
  margin: 0 0 16px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--moss);
  font-weight: 700;
}

.page-about .about-handbook__toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-handbook__toc li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--deep-line);
}

.page-about .about-handbook__toc li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-handbook__no {
  grid-row: span 2;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--moss);
}

.page-about .about-handbook__toc a {
  color: var(--mist);
  text-decoration: none;
  font-size: 15.5px;
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-handbook__toc a:hover {
  color: var(--lime);
  border-color: var(--lime);
}

.page-about .about-handbook__hint {
  grid-column: 2;
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(232, 237, 233, .62);
}

/* ---------- 团队与角色（暖纸面板） ---------- */
.page-about .about-team {
  padding: var(--about-gap) 0;
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-team h2 {
  font-size: clamp(25px, 3.6vw, 40px);
  line-height: 1.16;
  color: var(--ink);
  margin: 10px 0 18px;
  max-width: 24ch;
}

.page-about .about-team__head > p:last-child {
  margin: 0;
  max-width: 64ch;
  color: var(--ink-2);
  line-height: 1.76;
}

.page-about .about-team__grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-role {
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--r-lg);
  border: 1px solid var(--paper-line);
  background: var(--paper-2);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease);
}

.page-about .about-role:hover {
  transform: translateY(-4px);
  border-color: #C8B99C;
  box-shadow: 0 20px 44px -28px rgba(16, 26, 22, .5);
}

.page-about .about-role__num {
  font-size: clamp(38px, 4.6vw, 56px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--deep);
}

.page-about .about-role h3 {
  margin: 0;
  font-size: 17px;
  color: var(--ink);
}

.page-about .about-role p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-2);
}

.page-about .about-team__external {
  margin-top: clamp(26px, 4vw, 40px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--paper-line);
}

.page-about .about-team__external h3 {
  margin: 0 0 14px;
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--ink-2);
}

.page-about .about-team__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-team__note {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 合作生态与行业认可 ---------- */
.page-about .about-partners {
  padding: var(--about-gap) 0;
  background: linear-gradient(180deg, var(--deep) 0%, var(--deep-2) 100%);
}

.page-about .about-partners h2 {
  font-size: clamp(25px, 3.6vw, 40px);
  line-height: 1.16;
  color: var(--mist);
  margin: 10px 0 18px;
  max-width: 24ch;
}

.page-about .about-partners__head > p:last-child {
  margin: 0;
  max-width: 64ch;
  color: rgba(232, 237, 233, .8);
  line-height: 1.76;
}

.page-about .about-partners__grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-partner {
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--r-lg);
  border: 1px solid var(--deep-line);
  background: rgba(255, 255, 255, .025);
  transition: border-color .35s var(--ease), background .35s var(--ease);
}

.page-about .about-partner:hover {
  border-color: rgba(198, 255, 61, .3);
  background: rgba(198, 255, 61, .04);
}

.page-about .about-partner__num {
  display: block;
  font-size: clamp(38px, 5vw, 56px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.03em;
  margin-bottom: 14px;
  color: var(--lime);
}

.page-about .about-partner:nth-child(2) .about-partner__num {
  color: var(--amber);
}

.page-about .about-partner:nth-child(3) .about-partner__num {
  color: var(--cyan);
}

.page-about .about-partner h3 {
  margin: 0 0 10px;
  font-size: 16.5px;
  color: var(--mist);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(232, 237, 233, .76);
}

.page-about .about-partners__cta {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--r-lg);
  border: 1px dashed var(--deep-line);
  background: rgba(0, 0, 0, .2);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.page-about .about-partners__cta p {
  margin: 0;
  max-width: 56ch;
  color: rgba(232, 237, 233, .82);
  line-height: 1.7;
}

/* ---------- 咨询与联系 ---------- */
.page-about .about-contact {
  padding: 0 0 var(--about-gap);
  background: var(--deep-2);
}

.page-about .about-contact__panel {
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--r-xl);
  border: 1px solid var(--deep-line);
  background:
    radial-gradient(80% 100% at 100% 0%, rgba(198, 255, 61, .10), transparent 58%),
    radial-gradient(70% 90% at 0% 100%, rgba(62, 142, 255, .09), transparent 62%),
    var(--deep);
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-contact h2 {
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.2;
  color: var(--mist);
  margin: 10px 0 16px;
  max-width: 22ch;
}

.page-about .about-contact__text > p {
  margin: 0;
  max-width: 58ch;
  color: rgba(232, 237, 233, .82);
  line-height: 1.76;
}

.page-about .about-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-contact__list {
  margin: 0;
  padding: clamp(20px, 3vw, 26px);
  border-radius: var(--r-lg);
  border: 1px solid var(--deep-line);
  background: rgba(0, 0, 0, .24);
  display: grid;
  gap: 16px;
}

.page-about .about-contact__list > div {
  display: grid;
  gap: 5px;
}

.page-about .about-contact__list dt {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--moss);
}

.page-about .about-contact__list dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--mist);
  overflow-wrap: break-word;
  word-break: break-word;
}

.page-about .about-contact__list dd.mono {
  letter-spacing: .01em;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-about .about-origin__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
    gap: clamp(36px, 5vw, 64px);
  }

  .page-about .about-method__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .about-contact__panel {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }
}

@media (min-width: 1120px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item,
  .page-about .about-role,
  .page-about .about-partner,
  .page-about .about-origin__list li {
    transition: none;
  }

  .page-about .about-timeline__item:hover,
  .page-about .about-role:hover {
    transform: none;
  }
}