/* ===== 半岛体育中文站 · 品牌自述页 ===== */

.page-about {
  --about-max: 62ch;
}

/* 面包屑 */
.page-about .about-crumb {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(16px, 3vw, 28px);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--text-3);
}

.page-about .about-crumb a {
  color: var(--text-3);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--brand-bright);
}

/* ===== 首屏框景 ===== */
.page-about .about-hero {
  padding: clamp(24px, 5vw, 56px) 0 clamp(28px, 5vw, 64px);
}

.page-about .about-hero__frame {
  position: relative;
  border: var(--line);
  padding: clamp(24px, 5vw, 60px) clamp(18px, 4vw, 56px);
  background:
    radial-gradient(120% 100% at 88% 6%, rgba(30, 143, 99, 0.16), transparent 60%),
    linear-gradient(180deg, rgba(13, 42, 68, 0.72), rgba(6, 23, 38, 0.55));
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-size: clamp(2rem, 6.2vw, 4.4rem);
  font-weight: 300;
  line-height: 1.14;
  letter-spacing: -0.02em;
  max-width: 20ch;
  color: var(--text);
}

.page-about .about-hero__lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 52ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-2);
}

.page-about .about-hero__pulse {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  max-width: 620px;
  border-top: var(--line);
}

.page-about .about-hero__pulse li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 16px;
  padding: 12px 0;
  border-bottom: var(--line);
}

.page-about .pulse-num {
  flex: 0 0 auto;
  min-width: 68px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  line-height: 1.2;
  color: var(--amber);
}

.page-about .pulse-num em {
  font-style: normal;
  font-size: 12px;
  margin-left: 2px;
  color: var(--text-3);
}

.page-about .pulse-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-2);
}

/* ===== 说明牌 + 长栏正文 ===== */
.page-about .about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-about .spec-plate {
  position: relative;
  border: var(--line);
  padding: 22px 20px 24px;
  background: linear-gradient(180deg, rgba(13, 42, 68, 0.9), rgba(10, 33, 54, 0.7));
}

.page-about .spec-plate__lead {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-2);
}

.page-about .spec-stats {
  margin: 18px 0 0;
  padding: 0;
}

.page-about .spec-stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-top: var(--line);
}

.page-about .spec-stat dt {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-3);
}

.page-about .spec-stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 21px;
  line-height: 1.2;
  color: var(--text);
}

.page-about .spec-stat dd em {
  font-style: normal;
  font-size: 12px;
  margin-left: 2px;
  color: var(--text-3);
}

.page-about .about-content {
  display: flex;
  flex-direction: column;
  gap: clamp(36px, 5vw, 64px);
  min-width: 0;
}

.page-about .about-block > .index-label {
  margin: 0;
}

.page-about .about-h2 {
  margin: 10px 0 0;
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
  max-width: 24ch;
}

.page-about .about-p {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-2);
  max-width: var(--about-max);
}

/* 图片 */
.page-about .about-figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 100%;
}

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

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--text-3);
}

/* 分工编号块 */
.page-about .role-track {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
}

.page-about .role-item {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  grid-template-areas:
    "idx name"
    "idx desc";
  gap: 4px 16px;
  padding: 18px 0;
  border-top: var(--line);
}

.page-about .role-item:last-child {
  border-bottom: var(--line);
}

.page-about .role-item__idx {
  grid-area: idx;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--brand-bright);
}

.page-about .role-item__name {
  grid-area: name;
  margin: 0;
  font-size: 17px;
  font-weight: 500;
  color: var(--text);
}

.page-about .role-item__desc {
  grid-area: desc;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-2);
}

/* ===== 通栏横幅 ===== */
.page-about .about-banner {
  position: relative;
  margin: clamp(40px, 7vw, 88px) 0;
  overflow: hidden;
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(220px, 32vw, 400px);
  object-fit: cover;
}

.page-about .about-banner__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 10px;
  padding: clamp(20px, 4vw, 52px);
  background: linear-gradient(180deg, rgba(6, 23, 38, 0.12) 0%, rgba(6, 23, 38, 0.88) 100%);
  pointer-events: none;
}

.page-about .about-banner__text {
  margin: 0;
  max-width: 42ch;
  font-size: clamp(15px, 2vw, 18px);
  line-height: 1.7;
  color: var(--text);
}

/* ===== 版本阶段时间线 ===== */
.page-about .about-phases__lede {
  max-width: 58ch;
}

.page-about .phase-scale {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 9px;
  margin: clamp(24px, 4vw, 40px) 0 26px;
  padding: 0 8px;
}

.page-about .phase-scale::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: var(--hair);
}

.page-about .phase-scale span {
  position: relative;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(245, 168, 59, 0.14);
}

.page-about .phase-track {
  display: flex;
  gap: 16px;
  margin: 0;
  padding: 0 0 16px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .phase-card {
  flex: 0 0 clamp(252px, 31%, 400px);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 24px;
  border: var(--line);
  background: rgba(13, 42, 68, 0.62);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .phase-card:hover {
  border-color: rgba(30, 143, 99, 0.7);
  background: rgba(30, 143, 99, 0.08);
}

.page-about .phase-card__ver {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-about .phase-card__name {
  margin: 0;
  font-size: 19px;
  font-weight: 500;
  color: var(--text);
}

.page-about .phase-card__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-2);
}

/* ===== 覆盖范围 ===== */
.page-about .coverage-band {
  border-top: var(--line);
  border-bottom: var(--line);
  background: rgba(126, 143, 163, 0.08);
  padding: clamp(26px, 4vw, 44px) clamp(18px, 3vw, 36px);
}

.page-about .coverage-facts {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .coverage-facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--hair);
}

.page-about .cov-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.1;
  color: var(--amber);
}

.page-about .cov-label {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-2);
}

/* ===== 长期维护 ===== */
.page-about .pledge-list {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
}

.page-about .pledge {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-top: var(--line);
}

.page-about .pledge:last-child {
  border-bottom: var(--line);
}

.page-about .pledge__num {
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--brand-bright);
}

.page-about .pledge__text {
  margin: 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--text);
  max-width: 60ch;
}

/* ===== 去向链接 ===== */
.page-about .next-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .next-link {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 46px 20px 20px;
  border: var(--line);
  background: rgba(13, 42, 68, 0.5);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .next-link::after {
  content: "→";
  position: absolute;
  right: 20px;
  top: 22px;
  font-size: 16px;
  color: var(--brand-bright);
  transition: transform 0.2s var(--ease);
}

.page-about .next-link:hover {
  border-color: rgba(30, 143, 99, 0.8);
  background: rgba(30, 143, 99, 0.1);
  transform: translateY(-2px);
}

.page-about .next-link:hover::after {
  transform: translateX(3px);
}

.page-about .next-link__name {
  font-size: 17px;
  font-weight: 500;
  color: var(--text);
}

.page-about .next-link__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-2);
}

/* ===== 焦点与响应式 ===== */
.page-about a:focus-visible,
.page-about .next-link:focus-visible {
  outline: 2px solid var(--brand-bright);
  outline-offset: 2px;
}

@media (min-width: 720px) {
  .page-about .coverage-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .next-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 940px) {
  .page-about .about-grid {
    grid-template-columns: minmax(0, 264px) minmax(0, 1fr);
    gap: clamp(32px, 4.5vw, 72px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .next-link,
  .page-about .phase-card,
  .page-about .about-crumb a {
    transition: none;
  }

  .page-about .next-link:hover,
  .page-about .next-link:hover::after {
    transform: none;
  }
}