/* ══════════════════════════════════════
   品牌与俱乐部档案 /brand/
   页面作用域：.page-about
   ══════════════════════════════════════ */

.page-about {
  --about-surface: rgba(16, 38, 31, 0.72);
  --about-surface-strong: rgba(16, 38, 31, 0.94);
  --about-paper-ink: #02100C;
  --about-paper-dim: #3C5A52;
  --about-paper-accent: #0B6B5E;
  --about-shadow: 0 30px 60px -40px rgba(0, 0, 0, 0.95);
  --about-slice: 12deg;
  display: block;
}

/* ── 面包屑 ── */
.page-about .about-crumbs {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}
.page-about .about-crumb-sep {
  margin: 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ash-400);
}

/* ── 首屏：斜切色块 + 错位图文 ── */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.5rem, 4vw, 2.5rem) clamp(2.5rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__slice {
  position: absolute;
  top: -26%;
  right: -30%;
  width: min(760px, 92vw);
  aspect-ratio: 1 / 1;
  border-radius: 72px;
  transform: rotate(var(--about-slice));
  background:
    linear-gradient(138deg, rgba(52, 226, 208, 0.16) 0%, rgba(52, 226, 208, 0) 58%),
    linear-gradient(138deg, rgba(31, 74, 61, 0.9) 0%, rgba(10, 27, 23, 0) 74%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(23, 53, 44, 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(23, 53, 44, 0.6) 1px, transparent 1px);
  background-size: 84px 84px;
  -webkit-mask-image: radial-gradient(circle at 80% 20%, #000 0%, transparent 66%);
  mask-image: radial-gradient(circle at 80% 20%, #000 0%, transparent 66%);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

.page-about .about-hero__lead {
  min-width: 0;
}

.page-about .about-hero__lead .display-title {
  margin: 0.6rem 0 0;
  max-width: 16em;
}

.page-about .about-hero__lead .lede {
  margin-top: 1.1rem;
  max-width: 34em;
  color: var(--text);
}

/* 章节索引标签 */
.page-about .about-chapter__code {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--cyan-400);
}
.page-about .about-chapter__code::after {
  content: "";
  display: block;
  width: 42px;
  height: 1px;
  background: currentColor;
  opacity: 0.55;
}

/* 首屏事实条 */
.page-about .about-facts {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}
.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--about-surface);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .about-fact:hover {
  border-color: rgba(52, 226, 208, 0.4);
  background: rgba(16, 38, 31, 0.92);
}
.page-about .about-fact b {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cyan-200);
}
.page-about .about-fact span {
  font-size: 0.8125rem;
  color: var(--text-dim);
}

.page-about .about-hero__lead .actions {
  margin-top: 1.75rem;
}

/* 首屏图 */
.page-about .about-hero__figure {
  margin: 0;
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--pitch-900);
}
.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.page-about .about-hero__caption {
  padding: 0.85rem 1rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--text-dim);
  border-top: 1px solid var(--line-soft);
  background: rgba(10, 27, 23, 0.85);
}

/* ── 主体：左栏 + 正文 ── */
.page-about .about-body {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

/* 左栏 */
.page-about .about-rail {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 1.1rem 1rem;
  background: rgba(10, 27, 23, 0.72);
}
.page-about .about-rail__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--ash-400);
}
.page-about .about-rail__title + .about-rail__list {
  margin-bottom: 1.5rem;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
}
.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-size: 0.875rem;
  color: var(--text);
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}
.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  background: var(--moss-600);
  border-color: rgba(52, 226, 208, 0.35);
  color: #fff;
}
.page-about .about-rail__link:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}
.page-about .about-rail__code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
}

/* 版本轴 */
.page-about .about-axis {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 1rem;
  border-left: 1px solid var(--line-soft);
  display: grid;
  gap: 0.55rem;
}
.page-about .about-axis__item {
  position: relative;
}
.page-about .about-axis__item::before {
  content: "";
  position: absolute;
  left: calc(-1rem - 4.5px);
  top: 0.85rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan-400);
  box-shadow: 0 0 0 3px rgba(52, 226, 208, 0.16);
}
.page-about .about-axis__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(16, 38, 31, 0.85);
  font-size: 0.8125rem;
  color: var(--text);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}
.page-about .about-axis__link span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--cyan-200);
}
.page-about .about-axis__link:hover,
.page-about .about-axis__link:focus-visible {
  background: var(--moss-600);
  border-color: rgba(52, 226, 208, 0.5);
  transform: translateY(-2px);
}
.page-about .about-axis__link:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

/* 正文列 */
.page-about .about-content {
  min-width: 0;
  display: grid;
  gap: clamp(2.5rem, 5vw, 4rem);
}

.page-about .about-chapter {
  min-width: 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}
.page-about .about-chapter__title {
  margin: 0.7rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.375rem, 3.2vw, 2rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--paper-050);
}
.page-about .about-chapter__lede {
  margin-top: 0.9rem;
  max-width: 36em;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--text);
}

/* ── A2 版本条目 ── */
.page-about .about-versions {
  margin-top: 1.75rem;
  display: grid;
  gap: 1rem;
}
.page-about .about-version {
  scroll-margin-top: 6rem;
  position: relative;
  padding: clamp(1.1rem, 3vw, 1.5rem);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(158deg, rgba(16, 38, 31, 0.92) 0%, rgba(10, 27, 23, 0.7) 100%);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}
.page-about .about-version:hover {
  border-color: rgba(52, 226, 208, 0.4);
  transform: translateY(-2px);
  box-shadow: var(--about-shadow);
}
.page-about .about-version__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.75rem;
}
.page-about .about-version__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.0625rem, 2.2vw, 1.25rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--cyan-200);
}
.page-about .about-version p {
  margin: 0;
  max-width: 36em;
  line-height: 1.78;
  color: var(--text);
}
.page-about .about-version p + p {
  margin-top: 0.8rem;
}
.page-about .about-version__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--ash-400) !important;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--line-soft);
}

/* 浮出档案卡 */
.page-about .about-dossier {
  margin-top: 1.5rem;
  display: grid;
  gap: 1.25rem;
  padding: clamp(1rem, 3vw, 1.5rem);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--about-surface-strong);
  box-shadow: var(--about-shadow);
}
.page-about .about-dossier__figure {
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--pitch-900);
}
.page-about .about-dossier__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}
.page-about .about-dossier__body {
  min-width: 0;
}
.page-about .about-dossier__code {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--cyan-400);
}
.page-about .about-dossier__body h3 {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper-050);
}
.page-about .about-dossier__body p {
  margin: 0;
  max-width: 34em;
  line-height: 1.78;
  color: var(--text);
}
.page-about .about-dossier__body p + p {
  margin-top: 0.75rem;
}

/* ── A3 四个动作 ── */
.page-about .about-scope {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}
.page-about .about-scope__item {
  position: relative;
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--about-surface);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .about-scope__item:hover {
  border-color: rgba(52, 226, 208, 0.42);
  background: rgba(23, 53, 44, 0.75);
}
.page-about .about-scope__code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--ember-300);
  margin-bottom: 0.45rem;
}
.page-about .about-scope__item h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--cyan-200);
}
.page-about .about-scope__item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text);
}

.page-about .about-note {
  margin: 1.5rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--moss-600);
  max-width: 36em;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ── A4 数据口径表 ── */
.page-about .about-table-wrap {
  margin-top: 1.75rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: rgba(10, 27, 23, 0.6);
}
.page-about .about-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.page-about .about-table th,
.page-about .about-table td {
  text-align: left;
  vertical-align: top;
}
.page-about .about-table thead th {
  padding: 0.85rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--ash-400);
  border-bottom: 1px solid var(--line);
  background: rgba(16, 38, 31, 0.75);
}
.page-about .about-table tbody th,
.page-about .about-table tbody td {
  padding: 0.85rem 0.9rem;
  border-bottom: 1px solid var(--line-soft);
  line-height: 1.7;
  color: var(--text);
}
.page-about .about-table tbody tr:last-child th,
.page-about .about-table tbody tr:last-child td {
  border-bottom: none;
}
.page-about .about-table tbody th {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--cyan-200);
  white-space: nowrap;
}
.page-about .about-table tbody tr {
  transition: background var(--dur) var(--ease);
}
.page-about .about-table tbody tr:hover {
  background: rgba(31, 74, 61, 0.35);
}

/* ── A5 反转区块 ── */
.page-about .about-paper {
  scroll-margin-top: 6rem;
  border-top: none;
  padding: clamp(1.35rem, 4vw, 2.25rem);
  border-radius: var(--r-lg);
  background: var(--paper-050);
  color: var(--about-paper-ink);
}
.page-about .about-paper .about-chapter__code {
  color: var(--about-paper-accent);
}
.page-about .about-paper .about-chapter__title {
  color: var(--about-paper-ink);
}
.page-about .about-paper__lede {
  margin: 0.9rem 0 0;
  max-width: 36em;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--about-paper-dim);
}
.page-about .about-rules {
  margin: 1.5rem 0 0;
  display: grid;
  gap: 0;
}
.page-about .about-rules__row {
  padding: 1.05rem 0;
  border-top: 1px solid rgba(2, 16, 12, 0.14);
}
.page-about .about-rules__row:first-child {
  border-top: 1px solid rgba(2, 16, 12, 0.24);
}
.page-about .about-rules dt {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.005em;
  color: var(--about-paper-ink);
}
.page-about .about-rules dd {
  margin: 0.45rem 0 0;
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-paper-dim);
}

/* ── A6 协作 ── */
.page-about .about-team {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}
.page-about .about-team__item {
  padding: 1.05rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(16, 38, 31, 0.62);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .about-team__item:hover {
  border-color: rgba(52, 226, 208, 0.4);
  transform: translateY(-2px);
}
.page-about .about-team__item h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  color: var(--cyan-200);
}
.page-about .about-team__item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text);
}

.page-about .about-stand {
  margin: 2rem 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--pitch-900);
}
.page-about .about-stand img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}
.page-about .about-stand figcaption {
  padding: 0.85rem 1rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--text-dim);
  border-top: 1px solid var(--line-soft);
  background: rgba(10, 27, 23, 0.85);
}

/* ── 后续入口 ── */
.page-about .about-next {
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}
.page-about .about-next__title {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  letter-spacing: -0.015em;
  color: var(--paper-050);
}
.page-about .about-next__grid {
  display: grid;
  gap: 0.85rem;
}
.page-about .about-next__link {
  display: grid;
  gap: 0.35rem;
  padding: 1.05rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(10, 27, 23, 0.7);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}
.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  border-color: rgba(52, 226, 208, 0.55);
  background: var(--moss-600);
  transform: translateY(-2px);
}
.page-about .about-next__link:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}
.page-about .about-next__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--cyan-400);
}
.page-about .about-next__desc {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text);
}

/* ── 中屏：正文双列节奏 ── */
@media (min-width: 640px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-scope {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-dossier {
    grid-template-columns: minmax(140px, 200px) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-versions {
    gap: 1.15rem;
  }
}

/* ── 宽屏：左栏固定 + 正文错位 ── */
@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(2rem, 5vw, 4.5rem);
  }
  .page-about .about-hero__figure {
    margin-top: clamp(1.5rem, 4vw, 3.5rem);
  }
  .page-about .about-versions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    align-items: start;
  }
  .page-about .about-version:nth-child(2) {
    margin-top: 1.75rem;
  }
  .page-about .about-version:nth-child(3) {
    margin-top: 3.5rem;
  }
  .page-about .about-dossier {
    margin-left: clamp(0px, 4vw, 3rem);
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
    align-items: start;
  }
  .page-about .about-rail {
    position: sticky;
    top: 96px;
  }
  .page-about .about-version__meta {
    margin-top: 0.8rem;
  }
}

/* ── 窄屏：表格转堆叠卡片，斜切角度收窄 ── */
@media (max-width: 639px) {
  .page-about {
    --about-slice: 6deg;
  }
  .page-about .about-century,
  .page-about .about-hero__slice {
    border-radius: 40px;
  }
  .page-about .about-table-wrap {
    border: none;
    border-radius: 0;
    background: transparent;
    overflow: visible;
  }
  .page-about .about-table,
  .page-about .about-table tbody,
  .page-about .about-table tr,
  .page-about .about-table th,
  .page-about .about-table td {
    display: block;
    width: 100%;
  }
  .page-about .about-table thead {
    display: none;
  }
  .page-about .about-table tbody tr {
    border: 1px solid var(--line);
    border-radius: var(--r-md);
    background: rgba(16, 38, 31, 0.7);
    padding: 0.9rem 1rem;
    margin-bottom: 0.75rem;
  }
  .page-about .about-table tbody tr:last-child {
    margin-bottom: 0;
  }
  .page-about .about-table tbody th,
  .page-about .about-table tbody td {
    border-bottom: none;
    padding: 0;
    white-space: normal;
  }
  .page-about .about-table tbody th {
    font-size: 0.8125rem;
    letter-spacing: 0.1em;
    padding-bottom: 0.5rem;
  }
  .page-about .about-table tbody td {
    display: flex;
    gap: 0.75rem;
    justify-content: space-between;
    align-items: baseline;
    font-size: 0.875rem;
    padding: 0.25rem 0;
  }
  .page-about .about-table tbody td::before {
    content: attr(data-label);
    flex: 0 0 auto;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.08em;
    color: var(--ash-400);
  }
}

/* ── 无障碍：降低动效偏好 ── */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-fact,
  .page-about .about-version,
  .page-about .about-scope__item,
  .page-about .about-team__item,
  .page-about .about-next__link,
  .page-about .about-axis__link {
    transition: none;
  }
  .page-about .about-version:hover,
  .page-about .about-team__item:hover,
  .page-about .about-next__link:hover,
  .page-about .about-next__link:focus-visible,
  .page-about .about-axis__link:hover,
  .page-about .about-axis__link:focus-visible {
    transform: none;
  }
}
</final>