.page-about {
  background: var(--cream, #F5F0E6);
  color: var(--ink, #2B2B2B);
}

.page-about .wrap {
  max-width: var(--content-max, 80rem);
  margin: 0 auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

.page-about img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ===== Hero / 首屏版头 ===== */
.page-about .about-hero {
  padding-top: 1.5rem;
  padding-bottom: 2.5rem;
}

.page-about .about-hero-inner {
  position: relative;
  background: var(--snow, #FFFFFF);
  border: 1px solid var(--clay, #8C5B45);
  box-shadow: 6px 6px 0 var(--paper-line, #E3DAC9);
  padding: 1.75rem 1.25rem 2rem;
}

.page-about .about-hero-inner::before {
  content: "";
  position: absolute;
  right: -0.55rem;
  bottom: -0.55rem;
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  background: var(--accent-red, #C84C2E);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-about .about-hero-meta {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  align-self: start;
}

.page-about .about-edition-note {
  font-family: var(--font-mono, "Courier New", Courier, monospace);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--stone, #7A7A72);
}

.page-about h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.1;
  margin: 0 0 0.25rem;
  letter-spacing: -0.02em;
}

.page-about .about-subtitle {
  font-family: var(--font-hand, "Handlee", "Bradley Hand", cursive);
  font-size: 1.35rem;
  color: var(--accent-red, #C84C2E);
  margin: 0 0 1rem;
}

.page-about .about-hero-lead {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--stone, #7A7A72);
  margin: 0 0 1.25rem;
  max-width: 46rem;
}

.page-about .about-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ===== 通用段落结构 ===== */
.page-about .about-section {
  padding-top: 2.25rem;
  padding-bottom: 2.5rem;
  border-top: 1px solid var(--paper-line, #E3DAC9);
}

.page-about .about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-about .about-chapter {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  border-left: 3px solid var(--accent-red, #C84C2E);
  padding-left: 0.9rem;
}

.page-about .about-chapter-num {
  font-family: var(--font-mono, "Courier New", Courier, monospace);
  font-size: 2.5rem;
  line-height: 1;
  color: var(--clay, #8C5B45);
  transition: color 0.3s ease;
}

.page-about .about-chapter:hover .about-chapter-num,
.page-about .about-chapter:focus-within .about-chapter-num {
  color: var(--accent-red, #C84C2E);
}

.page-about .about-chapter-label {
  font-family: var(--font-mono, "Courier New", Courier, monospace);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-gold, #D9A441);
}

.page-about .about-chapter-cn {
  font-size: 0.9rem;
  color: var(--ink, #2B2B2B);
}

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

.page-about .about-content .lead {
  margin-top: 0.4rem;
}

/* ===== 品牌起源 ===== */
.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.page-about .about-origin-text p {
  margin: 0 0 1rem;
  line-height: 1.85;
  font-size: 0.95rem;
}

.page-about .about-origin-text a,
.page-about .about-history-note a,
.page-about .about-scope-more a,
.page-about .about-promise-contact a {
  color: var(--sky-blue, #3B7DD8);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 0.2s ease;
}

.page-about .about-origin-text a:hover,
.page-about .about-history-note a:hover,
.page-about .about-scope-more a:hover,
.page-about .about-promise-contact a:hover {
  color: var(--accent-red, #C84C2E);
}

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

/* ===== 发展历程 / 时间线 ===== */
.page-about .about-history {
  background: var(--snow, #FFFFFF);
  border-top: 1px solid var(--paper-line, #E3DAC9);
  border-bottom: 1px solid var(--paper-line, #E3DAC9);
}

.page-about .about-timeline {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline-track {
  position: absolute;
  left: 0;
  top: 0;
  width: 2rem;
  height: 100%;
  overflow: visible;
}

.page-about .about-track-path {
  fill: none;
  stroke: var(--clay, #8C5B45);
  stroke-width: 2;
  stroke-dasharray: 4 8;
  stroke-linecap: round;
}

.page-about .about-timeline-item {
  position: relative;
  padding-left: 3.25rem;
  padding-bottom: 2.1rem;
}

.page-about .about-timeline-item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline-node {
  position: absolute;
  left: 0.5625rem;
  top: 0.2rem;
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 50%;
  border: 2px solid var(--accent-gold, #D9A441);
  background: var(--snow, #FFFFFF);
  cursor: default;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .about-timeline-item:nth-child(even) .about-timeline-node {
  border-color: var(--accent-red, #C84C2E);
}

.page-about .about-timeline-node:hover,
.page-about .about-timeline-node:focus {
  transform: scale(1.25);
  border-color: var(--accent-red, #C84C2E);
  outline: none;
}

.page-about .about-timeline-node::after {
  content: "";
  position: absolute;
  inset: 0.15rem;
  border-radius: 50%;
  background: var(--accent-gold, #D9A441);
}

.page-about .about-timeline-tip {
  position: absolute;
  top: -0.35rem;
  left: 1.75rem;
  white-space: nowrap;
  font-family: var(--font-mono, "Courier New", Courier, monospace);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  background: var(--ink, #2B2B2B);
  color: var(--snow, #FFFFFF);
  padding: 0.3rem 0.55rem;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
  z-index: 2;
}

.page-about .about-timeline-node:hover .about-timeline-tip,
.page-about .about-timeline-node:focus .about-timeline-tip {
  opacity: 1;
  transform: translateY(0);
}

.page-about .about-timeline-index {
  display: inline-block;
  font-family: var(--font-mono, "Courier New", Courier, monospace);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--accent-gold, #D9A441);
  border-bottom: 1px solid var(--paper-line, #E3DAC9);
  padding-bottom: 0.15rem;
  margin-bottom: 0.3rem;
}

.page-about .about-timeline-body h3 {
  font-size: 1.1rem;
  margin: 0 0 0.4rem;
}

.page-about .about-timeline-body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--stone, #7A7A72);
}

.page-about .about-history-photo {
  margin: 2rem 0 0;
}

.page-about .about-history-note {
  font-size: 0.85rem;
  color: var(--stone, #7A7A72);
  margin: 1.25rem 0 0;
}

/* ===== 服务范围 ===== */
.page-about .about-scope-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  border-top: 1px solid var(--paper-line, #E3DAC9);
}

.page-about .about-scope-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--paper-line, #E3DAC9);
}

.page-about .about-scope-letter {
  font-family: var(--font-mono, "Courier New", Courier, monospace);
  font-size: 1.05rem;
  color: var(--sky-blue, #3B7DD8);
  line-height: 1;
}

.page-about .about-scope-item h3 {
  font-size: 1rem;
  margin: 0 0 0.3rem;
}

.page-about .about-scope-item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--stone, #7A7A72);
}

.page-about .about-scope-more {
  margin-top: 1.25rem;
  font-size: 0.88rem;
  color: var(--stone, #7A7A72);
}

/* ===== 品牌承诺 ===== */
.page-about .about-promise {
  background: var(--ink, #2B2B2B);
  color: var(--snow, #FFFFFF);
  border-top: 4px solid var(--accent-gold, #D9A441);
}

.page-about .about-promise .about-chapter-num {
  color: var(--accent-gold, #D9A441);
}

.page-about .about-promise .about-chapter:hover .about-chapter-num,
.page-about .about-promise .about-chapter:focus-within .about-chapter-num {
  color: var(--accent-red, #C84C2E);
}

.page-about .about-promise .about-chapter-label {
  color: var(--accent-gold, #D9A441);
}

.page-about .about-promise .about-chapter-cn {
  color: var(--cream, #F5F0E6);
}

.page-about .about-promise .section-title {
  color: var(--snow, #FFFFFF);
}

.page-about .about-promise .lead {
  color: var(--paper-line, #E3DAC9);
}

.page-about .about-promise-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.page-about .about-promise-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-promise-item {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.page-about .about-promise-item:first-child {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.page-about .about-promise-item .index-num {
  color: var(--accent-gold, #D9A441);
  flex-shrink: 0;
}

.page-about .about-promise-item strong {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--snow, #FFFFFF);
  font-size: 0.95rem;
}

.page-about .about-promise-item p {
  margin: 0;
  line-height: 1.7;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-motto {
  margin: 1.75rem 0 0;
  padding: 0.5rem 0 0.5rem 1.25rem;
  border-left: 4px solid var(--accent-red, #C84C2E);
  font-family: var(--font-hand, "Handlee", "Bradley Hand", cursive);
  font-size: 1.1rem;
  color: var(--paper-line, #E3DAC9);
}

.page-about .about-motto p {
  margin: 0;
}

.page-about .about-promise-photo {
  margin: 0;
}

.page-about .about-promise-contact {
  margin-top: 1.5rem;
  font-size: 0.88rem;
  color: var(--paper-line, #E3DAC9);
}

.page-about .about-promise-contact a {
  color: var(--sky-blue, #3B7DD8);
}

.page-about .about-promise-contact a:hover {
  color: var(--accent-gold, #D9A441);
}

/* ===== 后记 colophon ===== */
.page-about .about-colophon {
  margin: 2.5rem 0 3rem;
  padding: 1.5rem 1.25rem;
  border: 1px solid var(--paper-line, #E3DAC9);
  background: var(--snow, #FFFFFF);
}

.page-about .about-colophon p {
  margin: 0.4rem 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--stone, #7A7A72);
}

.page-about .about-end-note {
  font-family: var(--font-mono, "Courier New", Courier, monospace);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-align: right;
  text-transform: uppercase;
  color: var(--stone, #7A7A72);
  margin-top: 1rem;
}

/* ===== 桌面端媒体查询 ===== */
@media (min-width: 48rem) {
  .page-about .about-hero {
    padding-top: 2.5rem;
    padding-bottom: 3.5rem;
  }

  .page-about .about-hero-inner {
    padding: 3rem 3.5rem;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 11rem 1fr;
    gap: 3rem;
  }

  .page-about .about-hero-meta {
    margin-bottom: 0;
  }

  .page-about .about-section {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }

  .page-about .about-grid {
    grid-template-columns: minmax(8rem, 10rem) minmax(0, 1fr);
    gap: 4rem;
  }

  .page-about .about-chapter {
    position: sticky;
    top: 1.5rem;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3rem;
    align-items: center;
  }

  .page-about .about-scope-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 3rem;
  }

  .page-about .about-scope-item {
    flex-direction: row;
    gap: 1.25rem;
    align-items: baseline;
  }

  .page-about .about-promise-grid {
    grid-template-columns: 1fr 16rem;
    gap: 3rem;
    align-items: start;
  }

  .page-about .about-promise-item {
    gap: 1.25rem;
  }

  .page-about .about-colophon {
    padding: 2rem 2.5rem;
  }
}