/* ============================================================
   品牌文化 /culture/ 页面专属样式
   作用域：.page-about
   ============================================================ */

.page-about {
  --about-gap: clamp(18px, 3vw, 30px);
  --about-sticky-h: 54px;
  display: block;
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 20px 0 0;
  list-style: none;
  font-size: 13px;
}

.page-about .breadcrumb-list > li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .breadcrumb-list > li + li::before {
  content: "/";
  color: var(--line);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: 22px 0 0;
  background:
    radial-gradient(120% 92% at 10% 0%, rgba(251, 235, 214, 0.95) 0%, rgba(246, 241, 230, 0) 62%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(216, 207, 188, 0.62) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(216, 207, 188, 0.62) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.1) 86%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.1) 86%, transparent 100%);
  pointer-events: none;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .eyebrow {
  margin: 0 0 10px;
}

.page-about .hero-lead h1 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: clamp(29px, 6.4vw, 52px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--green);
}

.page-about .hero-lede {
  margin: 0 0 22px;
  max-width: 64ch;
  font-size: clamp(16px, 2.1vw, 17.5px);
  line-height: 1.78;
  color: var(--green-2);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .hero-plate {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: var(--border);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.page-about .plate-item {
  padding: 16px 16px 18px;
  border-right: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-about .plate-item:nth-child(2n) {
  border-right: 0;
}

.page-about .plate-item:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.page-about .plate-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5.6vw, 42px);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--apricot-deep);
}

.page-about .plate-label {
  display: block;
  margin-top: 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--green);
}

.page-about .plate-note {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  transition: color 200ms ease, opacity 200ms ease;
}

@media (min-width: 900px) and (hover: hover) {
  .page-about .plate-note {
    opacity: 0.6;
  }

  .page-about .plate-item:hover .plate-note,
  .page-about .plate-item:focus-within .plate-note {
    opacity: 1;
    color: var(--green-2);
  }
}

/* ---------- 赛季存档滑轨 ---------- */

.page-about .season-rail {
  display: flex;
  align-items: stretch;
  margin-top: 32px;
  border: var(--border);
  background: var(--green);
  color: var(--paper);
}

.page-about .rail-key {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  padding: 0 16px;
  font-family: var(--font-hand);
  font-size: 13px;
  color: var(--amber);
  border-right: 2px solid rgba(246, 241, 230, 0.28);
  white-space: nowrap;
}

.page-about .rail-track {
  display: flex;
  flex: 1 1 auto;
  min-width: 0;
  align-items: stretch;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .rail-chip {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 15px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: rgba(246, 241, 230, 0.7);
  border-right: 1px solid rgba(246, 241, 230, 0.18);
  white-space: nowrap;
}

.page-about .rail-chip.is-current {
  background: var(--apricot);
  color: var(--green-deep);
  font-weight: 700;
}

.page-about .rail-flag {
  font-family: var(--font-body);
  font-size: 11.5px;
  padding: 1px 6px;
  background: var(--green-deep);
  color: var(--amber);
}

/* ---------- 粘性阶段书签 ---------- */

.page-about .sticky-mark {
  position: sticky;
  top: 0;
  z-index: 6;
  margin-top: 28px;
  border-top: 2px solid var(--green);
  border-bottom: 2px solid var(--green);
  background: rgba(246, 241, 230, 0.95);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.page-about .sticky-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 8px;
  padding-bottom: 8px;
}

.page-about .sticky-key {
  flex: 0 0 auto;
  font-family: var(--font-hand);
  font-size: 13px;
  color: var(--apricot-deep);
  white-space: nowrap;
}

.page-about .sticky-list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 2px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .sticky-list::-webkit-scrollbar {
  display: none;
}

.page-about .sticky-link {
  display: block;
  padding: 6px 11px;
  font-size: 13.5px;
  color: var(--green);
  text-decoration: none;
  border: 2px solid transparent;
  white-space: nowrap;
  transition: background 160ms ease, border-color 160ms ease;
}

.page-about .sticky-link:hover,
.page-about .sticky-link:focus-visible {
  background: var(--paper-2);
  border-color: var(--green);
}

/* ---------- 区块骨架 ---------- */

.page-about .about-block {
  padding: 40px 0;
  scroll-margin-top: calc(var(--about-sticky-h) + 34px);
}

.page-about .block-head {
  margin-bottom: 26px;
}

.page-about .block-lede {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--green-2);
}

.page-about .split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .section-title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.6vw, 32px);
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--green);
}

.page-about .section-title .marker {
  display: inline-block;
  width: 6px;
  height: 22px;
  margin-right: 10px;
  vertical-align: -3px;
  background: var(--apricot);
}

/* ---------- 左栏数字卡 ---------- */

.page-about .split-side {
  position: relative;
  padding: 20px 20px 22px;
  background: var(--paper-2);
  border: var(--border);
  box-shadow: var(--shadow);
}

.page-about .split-side--quiet {
  background: var(--paper);
  box-shadow: none;
  border-style: dashed;
}

.page-about .split-side::after {
  content: "";
  position: absolute;
  top: -2px;
  right: -2px;
  width: 22px;
  height: 22px;
  background: linear-gradient(225deg, var(--paper) 48%, var(--line) 48%);
  border-left: 2px solid var(--green);
  border-bottom: 2px solid var(--green);
}

.page-about .split-side--quiet::after {
  background: linear-gradient(225deg, var(--paper) 48%, var(--line) 48%);
}

.page-about .side-kicker {
  display: block;
  font-family: var(--font-hand);
  font-size: 13px;
  color: var(--apricot-deep);
  margin-bottom: 8px;
}

.page-about .side-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(44px, 8.4vw, 68px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--green);
}

.page-about .side-unit {
  display: block;
  margin-top: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--green-2);
}

.page-about .side-note {
  display: block;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 2px dashed var(--line);
  font-family: var(--font-hand);
  font-size: 13px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 右侧正文 ---------- */

.page-about .e-body p {
  margin: 0 0 16px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--ink);
}

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

.page-about .e-body a {
  color: var(--verify);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .e-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .e-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--green-2);
}

.page-about .e-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background: var(--apricot);
}

.page-about .e-body .e-list {
  margin-bottom: 4px;
}

/* ---------- 表格 ---------- */

.page-about .table-scroll {
  margin-top: 22px;
}

.page-about .data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-about .data-table th,
.page-about .data-table td {
  padding: 11px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 2px solid var(--line);
}

.page-about .data-table thead th {
  background: var(--green-2);
  color: var(--paper);
  font-weight: 700;
  white-space: nowrap;
}

.page-about .data-table tbody th {
  color: var(--green);
  font-weight: 700;
}

/* ---------- 图片 ---------- */

.page-about .img-frame {
  margin: 0 0 24px;
}

.page-about .img-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.84) contrast(1.02);
}

.page-about .figure-bleed {
  margin-bottom: 30px;
}

/* ---------- 流程 ---------- */

.page-about .flow-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.page-about .flow-steps {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .flow-step {
  position: relative;
  padding-left: 18px;
  border-left: 6px solid var(--apricot);
}

.page-about .flow-dot {
  display: none;
}

.page-about .flow-when {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.01em;
  color: var(--verify);
}

.page-about .flow-title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 900;
  line-height: 1.36;
  color: var(--green);
}

.page-about .expand {
  border-top: 2px solid var(--line);
}

.page-about .expand-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 10px 0;
  background: transparent;
  border: 0;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  color: var(--green-2);
  text-align: left;
  cursor: pointer;
}

.page-about .expand-trigger:hover,
.page-about .expand-trigger:focus-visible {
  color: var(--apricot-deep);
}

.page-about .expand-arrow {
  display: inline-block;
  font-size: 11px;
  transition: transform 220ms ease;
}

.page-about .expand-trigger[aria-expanded="true"] .expand-arrow {
  transform: rotate(180deg);
}

.page-about .expand-inner {
  padding-bottom: 4px;
}

.page-about .expand-content p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.74;
  color: var(--green-2);
}

.page-about .expand-content p:last-child {
  margin-bottom: 14px;
}

.page-about.has-js .page-about .expand-panel[data-open="false"] {
  display: none;
}

.page-about .flow-figure {
  margin-top: 34px;
  margin-bottom: 0;
}

/* ---------- 深色合作面板 ---------- */

.page-about .panel--dark {
  border: var(--border);
  box-shadow: var(--shadow);
}

.page-about .partner-panel {
  padding: 26px 22px;
  background: var(--green);
  color: var(--paper);
}

.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.page-about .partner-copy .eyebrow {
  color: var(--amber);
}

.page-about .partner-copy .section-title {
  color: var(--paper);
}

.page-about .partner-copy p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(246, 241, 230, 0.86);
}

.page-about .e-list--light li {
  color: rgba(246, 241, 230, 0.9);
}

.page-about .e-list--light li::before {
  background: var(--amber);
}

.page-about .partner-copy .btn {
  margin-top: 20px;
}

.page-about .partner-figure {
  margin: 0;
}

.page-about .partner-figure img {
  border: 2px solid rgba(246, 241, 230, 0.35);
}

.page-about .partner-figure .img-caption {
  color: rgba(246, 241, 230, 0.62);
}

/* ---------- 收尾 ---------- */

.page-about .closing-block {
  padding-bottom: 68px;
}

.page-about .closing {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding: 26px 22px;
  background: var(--paper-2);
  border: var(--border);
  box-shadow: var(--shadow);
}

.page-about .closing-copy .tag {
  margin-bottom: 12px;
}

.page-about .closing-title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(21px, 3.4vw, 28px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--green);
}

.page-about .closing-text {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--green-2);
}

.page-about .closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-start;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about .partner-panel {
    padding: 32px 28px;
  }

  .page-about .closing {
    padding: 32px 30px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 34px;
  }

  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    gap: 40px;
  }

  .page-about .about-block {
    padding: 58px 0;
  }

  .page-about .split {
    grid-template-columns: minmax(0, 38fr) minmax(0, 62fr);
    gap: clamp(28px, 4vw, 48px);
  }

  .page-about .split--reverse {
    grid-template-columns: minmax(0, 62fr) minmax(0, 38fr);
  }

  .page-about .split--reverse .split-side {
    order: 2;
  }

  .page-about .split--reverse .e-body {
    order: 1;
  }

  .page-about .partner-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 36px;
  }

  .page-about .closing {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }

  .page-about .closing-actions {
    justify-content: flex-end;
  }

  /* 横向时间轴主干 */
  .page-about .flow-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
    padding-top: 32px;
  }

  .page-about .flow-steps::before {
    content: "";
    position: absolute;
    left: 8px;
    right: 8px;
    top: 8px;
    height: 2px;
    background: var(--green);
  }

  .page-about .flow-step {
    padding-left: 0;
    border-left: 0;
    padding-right: 6px;
  }

  .page-about .flow-dot {
    display: block;
    position: absolute;
    top: -32px;
    left: 0;
    width: 16px;
    height: 16px;
    background: var(--apricot);
    border: 2px solid var(--green);
    border-radius: 50%;
  }

  .page-about .flow-figure {
    margin-top: 44px;
    max-width: 720px;
  }
}

@media (min-width: 1100px) {
  .page-about .hero-grid {
    gap: 52px;
  }

  .page-about .sticky-key {
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .plate-note,
  .page-about .sticky-link,
  .page-about .expand-arrow {
    transition: none;
  }
}