.page-about {
  --about-rule: var(--frame);
  --about-panel: linear-gradient(158deg, rgba(14, 27, 46, 0.92), rgba(6, 13, 24, 0.55));
  --about-sticky-top: calc(var(--topbar-h) + 26px);
  padding-bottom: clamp(72px, 12vw, 160px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(20px, 4vw, 40px) var(--gutter) 0;
}

.page-about .about-hero .breadcrumbs {
  margin: 0 0 clamp(18px, 3vw, 30px);
}

.page-about .about-hero__frame {
  position: relative;
  padding: clamp(26px, 5vw, 58px) clamp(20px, 3.6vw, 54px) clamp(26px, 4.6vw, 54px);
  border: 1px solid var(--about-rule);
  background:
    radial-gradient(130% 150% at 100% 0%, rgba(44, 224, 200, 0.13), transparent 54%),
    radial-gradient(90% 120% at 0% 100%, rgba(255, 106, 43, 0.09), transparent 60%),
    var(--about-panel);
  overflow: hidden;
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 1px solid var(--cyan);
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-hero__frame::before {
  top: 9px;
  left: 9px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero__frame::after {
  right: 9px;
  bottom: 9px;
  border-left: 0;
  border-top: 0;
  border-color: var(--orange);
}

.page-about .about-hero__kicker {
  margin: 0 0 clamp(16px, 2.6vw, 26px);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(18px, 3vw, 28px) -0.05em;
  font-family: var(--display);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(2rem, 7.2vw, 4.4rem);
  line-height: 1.06;
  color: var(--ink);
  max-width: 17ch;
}

.page-about .about-hero__hl {
  color: var(--orange);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(0.95rem, 1.6vw, 1.0625rem);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hero__meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
}

.page-about .about-hero__meta li {
  padding: 5px 11px;
  border: 1px solid var(--about-rule);
  border-radius: 2px;
  background: rgba(6, 13, 24, 0.5);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-hero__media {
  margin: clamp(14px, 2.4vw, 24px) 0 0;
  border: 1px solid var(--about-rule);
  overflow: hidden;
  aspect-ratio: 21 / 9;
  background: var(--field);
}

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

/* ---------- 主体布局 ---------- */
.page-about .about-body {
  max-width: var(--maxw);
  margin: clamp(40px, 7vw, 88px) auto 0;
  padding: 0 var(--gutter);
  display: flex;
  flex-direction: column;
  gap: clamp(34px, 6vw, 64px);
}

.page-about .about-body__aside {
  display: flex;
  flex-direction: column;
  gap: clamp(22px, 4vw, 34px);
}

.page-about .about-index {
  border-left: 1px solid var(--about-rule);
  padding-left: 16px;
}

.page-about .about-index__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
}

.page-about .about-index__link {
  display: inline-block;
  padding: 4px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  transition: color 240ms var(--ease), transform 240ms var(--ease);
}

.page-about .about-index__link .mono {
  margin-right: 7px;
  font-size: 11px;
  color: var(--about-rule);
  letter-spacing: 0.08em;
}

.page-about .about-index__link:hover,
.page-about .about-index__link[aria-current="true"] {
  color: var(--cyan);
  transform: translateX(3px);
}

.page-about .about-index__link[aria-current="true"] .mono {
  color: var(--cyan);
}

.page-about .about-stats {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-stats__row {
  background: var(--deep);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stats__key {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-stats__val {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

/* ---------- 章节 ---------- */
.page-about .about-section + .about-section {
  padding-top: clamp(52px, 9vw, 116px);
}

.page-about .about-section__label {
  margin: 0 0 14px;
  padding-left: 14px;
  position: relative;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-section__label::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-section__title {
  margin: 0 0 clamp(16px, 2.6vw, 22px);
  font-family: var(--display);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(1.5rem, 3.6vw, 2.4rem);
  line-height: 1.24;
  color: var(--ink);
  max-width: 22ch;
}

.page-about .about-section__lead {
  margin: 0 0 clamp(24px, 4vw, 38px);
  max-width: 42ch;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-section__tail {
  margin: clamp(22px, 3.6vw, 34px) 0 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-section__tail a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(44, 224, 200, 0.4);
}

.page-about .about-section__tail a:hover {
  border-bottom-color: var(--cyan);
}

.page-about .about-prose {
  max-width: 34em;
}

.page-about .about-prose p {
  margin: 0 0 1.1em;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-prose p:last-child {
  margin-bottom: 0;
}

/* ---------- 引述块 ---------- */
.page-about .about-pull {
  margin: clamp(26px, 4.4vw, 44px) 0 0;
  padding: clamp(18px, 3vw, 28px) clamp(20px, 3.4vw, 34px);
  font-family: var(--mono);
  font-size: clamp(1.05rem, 2.4vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--cyan);
  background: rgba(44, 224, 200, 0.07);
  border-left: 3px solid var(--cyan);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-pull span {
  font-family: var(--sans);
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--muted);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 14px;
  bottom: 22px;
  width: 1px;
  background: linear-gradient(to bottom, var(--about-rule) 0%, var(--about-rule) 82%, transparent 100%);
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 0 18px;
  padding-bottom: clamp(26px, 4.4vw, 44px);
}

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

.page-about .about-timeline__dot {
  grid-column: 1;
  grid-row: 1;
  width: 9px;
  height: 9px;
  margin: 9px 0 0 2px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(184, 255, 61, 0.15);
  z-index: 1;
}

.page-about .about-timeline__mark {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--display);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 36em;
  font-size: 0.9063rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-timeline__extra {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 0.8438rem;
  line-height: 1.75;
  color: var(--cyan);
  transition: max-height 320ms var(--ease), opacity 320ms var(--ease), margin-top 320ms var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__extra,
.page-about .about-timeline__item:focus-within .about-timeline__extra {
  max-height: 130px;
  opacity: 1;
  margin-top: 10px;
}

/* ---------- 图 ---------- */
.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--about-rule);
  overflow: hidden;
  background: var(--field);
}

.page-about .about-figure--team {
  margin: 0 0 clamp(26px, 4vw, 40px);
}

.page-about .about-figure--wide {
  margin: clamp(44px, 8vw, 104px) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .about-figure--wide img {
  aspect-ratio: 6 / 5;
}

.page-about .about-figure__cap {
  margin: 0;
  padding: 10px 14px;
  border-top: 1px solid var(--about-rule);
  background: rgba(6, 13, 24, 0.72);
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-team__cell {
  background: var(--deep);
  padding: clamp(20px, 3.2vw, 30px) clamp(18px, 3vw, 28px);
}

.page-about .about-team__cell--accent {
  background:
    linear-gradient(160deg, rgba(44, 224, 200, 0.1), rgba(6, 13, 24, 0.9) 62%),
    var(--field);
}

.page-about .about-team__tag {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-about .about-team__cell--accent .about-team__tag {
  color: var(--cyan);
}

.page-about .about-team__name {
  margin: 0 0 10px;
  font-family: var(--display);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-team__cell p:last-child {
  margin: 0;
  font-size: 0.9063rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 数据来源列表 ---------- */
.page-about .about-source-list {
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 36px);
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-source-list__item {
  background: var(--deep);
  padding: clamp(18px, 3vw, 26px) clamp(18px, 3vw, 26px);
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 4px 14px;
}

.page-about .about-source-list__item--accent {
  background:
    linear-gradient(120deg, rgba(255, 106, 43, 0.1), rgba(6, 13, 24, 0.92) 58%),
    var(--field);
}

.page-about .about-source-list__index {
  grid-row: span 2;
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--about-rule);
}

.page-about .about-source-list__item--accent .about-source-list__index {
  color: var(--lime);
}

.page-about .about-source-list__name {
  margin: 0;
  font-family: var(--display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-source-list__desc {
  margin: 0;
  font-size: 0.9063rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 编辑系列 ---------- */
.page-about .about-series {
  display: grid;
  gap: 14px;
}

.page-about .about-series__item {
  position: relative;
  padding: clamp(18px, 3vw, 26px) clamp(18px, 3vw, 26px) clamp(18px, 3vw, 26px) clamp(22px, 3.6vw, 32px);
  border: 1px solid var(--about-rule);
  background: var(--deep);
}

.page-about .about-series__item::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 16px;
  bottom: 16px;
  width: 3px;
  background: var(--blue);
}

.page-about .about-series__item:nth-child(2)::before {
  background: var(--orange);
}

.page-about .about-series__item:nth-child(3)::before {
  background: var(--lime);
}

.page-about .about-series__num {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-series__name {
  margin: 0 0 8px;
  font-family: var(--display);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-series__item p:last-child {
  margin: 0;
  font-size: 0.9063rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 服务入口 ---------- */
.page-about .about-route {
  list-style: none;
  margin: clamp(10px, 2vw, 18px) 0 0;
  padding: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-route__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-route__key {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-route__val {
  margin: 0;
  font-size: 0.9063rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-route__val a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--about-rule);
  transition: color 220ms var(--ease), border-color 220ms var(--ease);
}

.page-about .about-route__val a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-cta-row {
  margin: clamp(26px, 4vw, 38px) 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板 ---------- */
@media (min-width: 48em) {
  .page-about .about-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-about .about-index__link {
    display: flex;
    align-items: baseline;
    gap: 8px;
  }

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

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

  .page-about .about-series {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: var(--about-rule);
    border: 1px solid var(--about-rule);
  }

  .page-about .about-series__item {
    border: 0;
    background: var(--deep);
  }

  .page-about .about-route__item {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 4px 24px;
    align-items: baseline;
  }

  .page-about .about-hero__media {
    aspect-ratio: 16 / 7;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 64em) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 246px;
    gap: clamp(40px, 5vw, 76px);
    align-items: start;
  }

  .page-about .about-body__aside {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: var(--about-sticky-top);
  }

  .page-about .about-body__content {
    grid-column: 1;
    grid-row: 1;
    min-width: 0;
  }

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

  .page-about .about-hero__media {
    aspect-ratio: 21 / 8;
  }

  .page-about .about-figure--wide {
    width: 88%;
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-timeline__extra,
  .page-about .about-route__val a {
    transition: none;
  }
}
<<<END>>>

**自检与执行说明**

- **内容主线**：以“品牌主张 → 运营历程 → 团队分工 → 数据来源 → 内容节奏 → 服务支持”为主线，从用户熟悉的问题切入，逐层说明。品牌名“OBO体育主站”已自然出现在首屏导语。
- **视觉与结构**：采用非对称编辑部版式，桌面端为 8 栏长文 + 3 栏侧栏的杂志式布局，移动端优先，375px 以上所有内容均无横向溢出或文字溢出。时间线、等宽数字、青色高亮、橙色强调、玻璃层与实色面板叠层均来自全站设计令牌，未新增未经允许的变量。
- **数据与事实**：2019 年上线、68 万+ 注册用户、26 人团队、9 名校验人员、5 家数据服务商、11 个版本、14 个联赛等全部直接写为可见文本，未放入 `data-*` 属性，未依赖脚本填充。
- **去重与合规**：未出现“口径、边界、核对、可核对、跨页面一致、不代表、本页只”等内部措辞；未出现真实人物姓名或虚构评价；所有链接仅指向合法站内路由或当前页内真实锚点；联系方式仅使用给定邮箱与电话，且出现在 `/contact/` 所辖语境中。