/* ===== 品牌故事页 · page-about ===== */
.page-about {
  position: relative;
  background: var(--color-cream);
  color: var(--color-dark);
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .breadcrumb {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 28px 24px 0;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 14px;
}

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

.page-about .breadcrumb li::after {
  content: "/";
  color: var(--color-gold);
}

.page-about .breadcrumb li:last-child::after {
  content: none;
}

.page-about .breadcrumb a {
  color: var(--color-dark);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .breadcrumb a:hover {
  color: var(--color-red);
}

/* 章节预览英雄区 */
.page-about .story-chapter-hero {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 40px 24px 56px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}

.page-about .hero-chapter-index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  border-bottom: 1px solid var(--color-sand);
  padding-bottom: 20px;
}

.page-about .chapter-chip {
  border: 1px solid var(--color-gold);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--color-dark);
  background: var(--color-cream);
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-about .chapter-chip:hover {
  background: var(--color-gold);
  color: var(--color-cream);
  border-color: var(--color-gold);
}

.page-about .hero-kicker {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: 0.28em;
  color: var(--color-red);
  font-weight: 700;
}

.page-about .hero-side-note {
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: 0.35em;
  color: var(--color-gold);
}

.page-about .hero-main-copy h1 {
  font-family: var(--font-heading);
  font-size: clamp(32px, 4.5vw, 52px);
  line-height: 1.22;
  font-weight: 900;
  color: var(--color-dark);
  margin: 0 0 20px;
  letter-spacing: 0.01em;
}

.page-about h1 em,
.page-about h2 em {
  font-style: normal;
  color: var(--color-gold);
  text-shadow: 0 2px 0 rgba(208, 52, 43, 0.12);
}

.page-about .hero-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-red);
  border-left: 4px solid var(--color-gold);
  padding-left: 16px;
  margin: 0 0 12px;
}

.page-about .hero-desc {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(42, 42, 42, 0.78);
  margin: 0 0 24px;
  max-width: 46em;
}

.page-about .hero-door-ornament {
  justify-self: center;
  position: relative;
  width: 96px;
  height: 144px;
  border: 3px solid var(--color-gold);
  border-radius: 48px 48px 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, rgba(208, 52, 43, 0.1), rgba(30, 48, 80, 0.08) 70%);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.28);
}

.page-about .hero-door-ornament::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-red), var(--color-gold));
  transform: translateX(-50%);
}

.page-about .ornament-char {
  font-family: var(--font-heading);
  font-size: 42px;
  font-weight: 900;
  color: var(--color-red);
  z-index: 1;
}

/* 章节标题 */
.page-about .section-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 32px;
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
  padding: 0 24px;
}

.page-about .section-heading-wrap h2 {
  font-family: var(--font-heading);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 900;
  line-height: 1.25;
  margin: 0 0 6px;
}

.page-about .section-sub {
  margin: 0;
  font-size: 14px;
  color: rgba(42, 42, 42, 0.6);
  letter-spacing: 0.04em;
}

/* 品牌缘起 */
.page-about .story-origin {
  padding: 0 0 64px;
}

.page-about .origin-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
}

.page-about .origin-text {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(42, 42, 42, 0.85);
}

.page-about .origin-text p {
  margin: 0 0 16px;
}

.page-about .origin-text strong {
  color: var(--color-red);
  font-weight: 700;
}

.page-about .note-callout {
  background: var(--color-sand);
  border-left: 4px solid var(--color-gold);
  border-radius: 0 12px 12px 0;
  padding: 16px 20px;
  margin-top: 24px;
}

.page-about .note-zh {
  display: block;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-red);
}

.page-about .note-en {
  display: block;
  font-size: 13px;
  color: rgba(42, 42, 42, 0.55);
  margin-top: 6px;
  line-height: 1.6;
}

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

.page-about .origin-figure figcaption,
.page-about .milestone-map figcaption,
.page-about .belief-figure figcaption {
  font-size: 13px;
  color: rgba(42, 42, 42, 0.66);
  padding-top: 10px;
  line-height: 1.6;
}

/* 里程碑深色区 */
.page-about .story-milestones {
  background: linear-gradient(180deg, var(--color-navy) 0%, #263655 44%, var(--color-navy) 100%);
  color: var(--color-cream);
  padding: 64px 0 72px;
  position: relative;
}

.page-about .story-milestones .section-head h2 {
  color: var(--color-cream);
}

.page-about .story-milestones .section-sub {
  color: rgba(247, 243, 235, 0.6);
}

.page-about .milestone-map {
  max-width: 920px;
  margin: 0 auto 48px;
  padding: 0 24px;
}

.page-about .story-milestones .milestone-map figcaption {
  color: rgba(247, 243, 235, 0.62);
}

.page-about .timeline-wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

.page-about .timeline-list {
  padding-left: 48px;
  margin: 0;
}

.page-about .timeline-rail {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 24px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-gold) 0%, var(--color-red) 50%, var(--color-gold) 100%);
  opacity: 0.45;
}

.page-about .milestone-item {
  position: relative;
  margin-bottom: 40px;
}

.page-about .milestone-item:last-child {
  margin-bottom: 0;
}

.page-about .milestone-node {
  position: absolute;
  left: -48px;
  top: 18px;
  width: 48px;
  display: flex;
  justify-content: center;
  z-index: 1;
}

.page-about .node-arch {
  width: 34px;
  height: 42px;
  border: 2px solid var(--color-gold);
  border-radius: 17px 17px 2px 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-navy);
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 900;
  color: var(--color-gold);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.18);
}

.page-about .milestone-card {
  background: rgba(247, 243, 235, 0.07);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 14px;
}

.page-about .ms-summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.page-about .ms-summary::-webkit-details-marker {
  display: none;
}

.page-about .ms-summary:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: -2px;
  border-radius: 14px;
}

.page-about .ms-version {
  background: var(--color-gold);
  color: var(--color-dark);
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 900;
  padding: 4px 10px;
  border-radius: 999px;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.page-about .ms-title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 19px;
  color: var(--color-cream);
  letter-spacing: 0.05em;
}

.page-about .ms-state {
  margin-left: auto;
  color: var(--color-cyan);
  font-size: 22px;
  line-height: 1;
  transition: transform 0.2s ease;
}

.page-about .milestone-card[open] .ms-state {
  transform: rotate(45deg);
}

.page-about .ms-content {
  padding: 14px 20px 20px;
  border-top: 1px dashed rgba(212, 175, 55, 0.35);
  color: rgba(247, 243, 235, 0.8);
  line-height: 1.8;
  font-size: 15px;
}

.page-about .ms-content p {
  margin: 0 0 10px;
}

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

/* 我们相信 */
.page-about .story-belief {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 64px 24px 56px;
}

.page-about .belief-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.page-about .belief-card {
  padding: 24px;
  border-radius: 14px;
  background: var(--color-sand);
  border: 1px solid rgba(212, 175, 55, 0.35);
  position: relative;
}

.page-about .belief-card:nth-child(2) {
  background: var(--color-red);
  border-color: var(--color-red);
}

.page-about .belief-num {
  font-family: var(--font-heading);
  font-size: 40px;
  font-weight: 900;
  color: rgba(208, 52, 43, 0.25);
  display: block;
  margin-bottom: 8px;
  line-height: 1;
}

.page-about .belief-card:nth-child(2) .belief-num {
  color: var(--color-gold);
}

.page-about .belief-card h3 {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 900;
  color: var(--color-dark);
  margin: 0 0 10px;
}

.page-about .belief-card:nth-child(2) h3 {
  color: var(--color-cream);
}

.page-about .belief-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(42, 42, 42, 0.78);
}

.page-about .belief-card:nth-child(2) p {
  color: rgba(247, 243, 235, 0.88);
}

.page-about .belief-figure {
  max-width: 720px;
  margin: 0 auto;
}

/* 服务对象深色区 */
.page-about .story-audience {
  background: var(--color-dark);
  color: var(--color-cream);
  padding: 64px 0;
}

.page-about .story-audience .section-head h2 {
  color: var(--color-cream);
}

.page-about .story-audience .section-sub {
  color: rgba(247, 243, 235, 0.6);
}

.page-about .audience-layout {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  padding: 0 24px;
}

.page-about .audience-copy {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(247, 243, 235, 0.85);
}

.page-about .audience-copy p {
  margin: 0 0 16px;
}

.page-about .audience-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .audience-list li {
  position: relative;
  padding-left: 20px;
}

.page-about .audience-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-gold);
}

.page-about .audience-list strong {
  color: var(--color-gold);
}

.page-about .audience-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.page-about .audience-actions .btn {
  border-radius: 999px;
  padding: 10px 22px;
  font-size: 15px;
  line-height: 1.6;
  border: 1px solid var(--color-gold);
  background: transparent;
  color: var(--color-gold);
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-about .audience-actions .btn:hover {
  background: var(--color-gold);
  color: var(--color-dark);
  border-color: var(--color-gold);
}

.page-about .audience-help {
  background: rgba(247, 243, 235, 0.08);
  border: 1px solid rgba(212, 175, 55, 0.35);
  border-radius: 14px;
  padding: 24px;
}

.page-about .audience-help h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 900;
  color: var(--color-gold);
  margin: 0 0 10px;
}

.page-about .audience-help p {
  margin: 0 0 12px;
  color: rgba(247, 243, 235, 0.8);
  line-height: 1.7;
}

.page-about .audience-help .card-link {
  display: block;
  margin-bottom: 8px;
  color: var(--color-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(212, 175, 55, 0.4);
  padding-bottom: 2px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about .audience-help .card-link:hover {
  border-color: var(--color-gold);
  color: var(--color-cream);
}

/* ===== 桌面端增强 ===== */
@media (min-width: 700px) {
  .page-about .story-chapter-hero {
    grid-template-columns: minmax(0, 1fr) 240px;
    grid-template-areas:
      "chips chips"
      "copy door";
    padding-top: 56px;
    padding-bottom: 80px;
  }

  .page-about .hero-chapter-index {
    grid-area: chips;
  }

  .page-about .hero-main-copy {
    grid-area: copy;
  }

  .page-about .hero-door-ornament {
    grid-area: door;
    justify-self: end;
    align-self: center;
  }

  .page-about .origin-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: 48px;
  }

  .page-about .story-origin {
    padding-bottom: 80px;
  }

  /* 时间轴：门框线居中，里程碑左右交错 */
  .page-about .timeline-list {
    padding-left: 0;
  }

  .page-about .timeline-rail {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .milestone-item {
    width: 50%;
    margin-bottom: 32px;
  }

  .page-about .milestone-item:nth-child(odd) {
    margin-right: auto;
    padding-right: 64px;
  }

  .page-about .milestone-item:nth-child(even) {
    margin-left: 50%;
    padding-left: 64px;
  }

  .page-about .milestone-item:nth-child(odd) .milestone-node {
    left: auto;
    right: -24px;
  }

  .page-about .milestone-item:nth-child(even) .milestone-node {
    right: auto;
    left: -24px;
  }

  .page-about .belief-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .audience-layout {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 48px;
    align-items: start;
  }
}