.page-about {
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-2);
  border-bottom: 3px solid var(--ember);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
  filter: saturate(0.85) contrast(1.08);
}

.page-about .about-hero__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(11, 27, 43, 0.97) 0%, rgba(11, 27, 43, 0.86) 46%, rgba(11, 27, 43, 0.42) 100%),
    repeating-linear-gradient(115deg, rgba(244, 239, 230, 0.05) 0 2px, transparent 2px 14px);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: clamp(24px, 4vw, 44px);
  padding-bottom: clamp(40px, 6vw, 78px);
}

.page-about .about-hero__crumb {
  margin-bottom: clamp(16px, 3vw, 26px);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.page-about .about-hero__crumb a {
  color: var(--jade-soft);
  text-decoration: none;
}

.page-about .about-hero__crumb a:hover {
  color: var(--track);
}

.page-about .about-hero__crumb span {
  color: var(--mist);
  margin: 0 6px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 5.6vw, 4.2rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 10px 0 0;
  max-width: 20ch;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  max-width: 60ch;
  font-size: clamp(0.98rem, 1.4vw, 1.08rem);
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.84);
}

.page-about .about-hero__figures {
  list-style: none;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1px;
  max-width: 640px;
  background: var(--line-strong);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .about-hero__figures li {
  background: rgba(18, 40, 61, 0.92);
  padding: 14px 16px 16px;
}

.page-about .figure-num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.8rem, 4.2vw, 2.6rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--track);
}

.page-about .figure-label {
  display: block;
  margin-top: 8px;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ===== 主体栅格 ===== */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.4vw, 36px);
  padding-top: clamp(24px, 4vw, 48px);
  padding-bottom: clamp(40px, 6vw, 76px);
  align-items: start;
}

.page-about .about-flow {
  display: grid;
  gap: clamp(28px, 4.4vw, 54px);
  min-width: 0;
}

/* ===== 左栏索引 ===== */
.page-about .about-index {
  background: var(--ink-2);
  border: 2px solid var(--line-soft);
  padding: 14px 16px;
  min-width: 0;
}

.page-about .about-index__title {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  color: var(--jade-soft);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 10px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--paper);
  border-left: 3px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  background: rgba(244, 239, 230, 0.07);
  border-left-color: var(--track);
}

.page-about .about-index__year {
  font-family: var(--font-num);
  font-size: 1.2rem;
  letter-spacing: 0.02em;
  color: var(--ember);
}

.page-about .about-index__tag {
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-index__note {
  margin: 12px 0 0;
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--mist);
}

/* ===== 章节通用 ===== */
.page-about .about-chapter {
  min-width: 0;
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-about .about-flow > .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter__kicker {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 0.84rem;
  letter-spacing: 0.2em;
  color: var(--jade-soft);
}

.page-about .about-chapter h2 {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.6vw, 2.45rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  color: var(--paper);
}

.page-about .about-chapter h3 {
  font-family: var(--font-sans);
  font-size: 1.02rem;
  line-height: 1.5;
  margin: 0 0 8px;
  color: var(--paper);
}

.page-about .about-chapter p {
  margin: 0 0 14px;
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.82);
  max-width: 66ch;
}

.page-about .about-chapter__lead {
  font-size: clamp(1rem, 1.4vw, 1.08rem);
  color: rgba(244, 239, 230, 0.9);
}

/* ===== 时间轴 ===== */
.page-about .about-timeline {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.6vw, 24px);
}

.page-about .about-node {
  position: relative;
  background: var(--ink-2);
  border: 2px solid var(--line-strong);
  border-left: 6px solid var(--ember);
  padding: clamp(16px, 2.4vw, 22px);
  box-shadow: var(--shadow-hard-sm);
  transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-about .about-node:nth-child(even) {
  border-left-color: var(--jade);
}

.page-about .about-node p {
  margin: 0 0 12px;
}

.page-about .about-node__year {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.9rem, 5vw, 2.9rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--paper);
  margin-bottom: 6px;
}

.page-about .about-node .tag {
  display: inline-block;
}

/* ===== 团队分工 ===== */
.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 20px 0 0;
}

.page-about .about-role {
  background: rgba(18, 40, 61, 0.66);
  border: 2px solid var(--line-soft);
  padding: 16px 18px;
}

.page-about .about-role__no {
  display: block;
  font-family: var(--font-num);
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  color: var(--jade-soft);
  margin-bottom: 8px;
}

.page-about .about-role p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: rgba(244, 239, 230, 0.78);
}

/* ===== 图片容器 ===== */
.page-about .about-figure {
  margin: clamp(20px, 3vw, 28px) 0 0;
  aspect-ratio: 3 / 2;
}

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

/* ===== 三道流程 ===== */
.page-about .about-steps {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-step {
  background: var(--ink-2);
  border-top: 4px solid var(--ember);
  padding: 18px;
}

.page-about .about-step:nth-child(2) {
  border-top-color: var(--jade);
}

.page-about .about-step:nth-child(3) {
  border-top-color: var(--track);
}

.page-about .about-step__no {
  display: block;
  font-family: var(--font-num);
  font-size: 1.55rem;
  line-height: 1;
  letter-spacing: 0.05em;
  color: var(--track);
  margin-bottom: 10px;
}

.page-about .about-step p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: rgba(244, 239, 230, 0.78);
}

/* ===== 协作网络 ===== */
.page-about .about-network {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 3vw, 26px);
  margin-top: 20px;
}

.page-about .about-network .about-figure {
  margin-top: 0;
}

.page-about .about-map {
  display: block;
  width: 100%;
  height: auto;
  background: var(--ink-2);
  border: 2px solid var(--line-strong);
  padding: 10px;
}

.page-about .about-map__node circle {
  transition: fill 0.2s ease;
}

.page-about .about-honor {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 14px 16px;
  background: rgba(15, 139, 126, 0.16);
  border: 2px dashed var(--line-strong);
  color: rgba(244, 239, 230, 0.88);
  font-size: 0.94rem;
  line-height: 1.7;
}

/* ===== 下一赛季 ===== */
.page-about .about-plan {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-plan li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 13px 15px;
  background: rgba(18, 40, 61, 0.72);
  border-left: 4px solid var(--jade);
  font-size: 0.94rem;
  line-height: 1.75;
  color: rgba(244, 239, 230, 0.82);
}

.page-about .about-plan__k {
  font-family: var(--font-num);
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--jade-soft);
}

/* ===== 收尾行动区 ===== */
.page-about .about-cta {
  background: var(--ember);
  color: var(--black);
  border-top: 4px solid var(--ember-deep);
  margin-top: clamp(32px, 5vw, 64px);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.4vw, 34px);
  padding-top: clamp(32px, 5vw, 56px);
  padding-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-cta__kicker {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 0.84rem;
  letter-spacing: 0.2em;
  color: var(--ink);
  opacity: 0.72;
}

.page-about .about-cta h2 {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.4vw, 2.35rem);
  line-height: 1.22;
  margin: 0 0 12px;
  color: var(--ink);
  max-width: 24ch;
}

.page-about .about-cta p {
  margin: 0 0 8px;
  line-height: 1.78;
  color: rgba(16, 16, 16, 0.84);
  max-width: 54ch;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-about .about-cta__btn {
  display: inline-block;
  padding: 11px 18px;
  background: var(--ink);
  color: var(--paper);
  border: 2px solid var(--ink);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  box-shadow: var(--shadow-hard-sm);
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.page-about .about-cta__contact {
  align-self: start;
  border-top: 3px solid rgba(16, 16, 16, 0.35);
  padding-top: 16px;
}

.page-about .about-cta__contact a {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.25rem, 3.2vw, 1.7rem);
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
  word-break: break-word;
  margin-bottom: 6px;
}

.page-about .about-cta__contact p {
  margin: 10px 0 0;
  font-size: 0.84rem;
  line-height: 1.7;
  color: rgba(16, 16, 16, 0.72);
}

/* ===== 交互增强（仅精确指针设备） ===== */
@media (hover: hover) {
  .page-about .about-node:hover {
    transform: translate(-2px, -2px);
    border-color: var(--track);
    box-shadow: 7px 7px 0 rgba(0, 0, 0, 0.58);
  }

  .page-about .about-map__node:hover circle {
    fill: var(--track);
  }

  .page-about .about-cta__btn:hover {
    background: var(--ink-2);
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.5);
  }

  .page-about .about-cta__contact a:hover {
    text-decoration: underline;
    color: var(--ink-2);
  }
}

.page-about .about-cta__btn:focus-visible,
.page-about .about-cta__contact a:focus-visible,
.page-about .about-index__list a:focus-visible {
  outline: 3px solid var(--track);
  outline-offset: 3px;
}

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

  .page-about .about-plan li {
    grid-template-columns: 7.5em minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
}

/* ===== 桌面 ===== */
@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: 198px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--bar-h) + 22px);
    padding: 18px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
    gap: 2px;
  }

  .page-about .about-node:nth-child(even) {
    margin-left: 7%;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .about-network {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ===== 降低动效 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-node,
  .page-about .about-cta__btn,
  .page-about .about-map__node circle,
  .page-about .about-index__list a {
    transition: none;
  }

  .page-about .about-node:hover,
  .page-about .about-cta__btn:hover {
    transform: none;
  }
}