.page-about {
  background-color: var(--c-paper);
  color: var(--c-ink);
  overflow-x: hidden;
  animation: about-page-in 0.3s ease-out;
}

@keyframes about-page-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ---------- 首屏英雄区 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, #081733 0%, var(--c-navy) 55%, #0d2450 100%);
  color: var(--c-white);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 78% 22%, rgba(201, 162, 39, 0.16) 0%, transparent 46%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-top: 44px;
  padding-bottom: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.page-about .about-hero__tag {
  display: inline-block;
  margin: 0 0 18px;
  padding: 6px 14px;
  border: 1px solid rgba(201, 162, 39, 0.5);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gold-soft);
}

.page-about .about-hero__copy h1 {
  margin: 0 0 20px;
  font-family: var(--font-sans);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: 0.02em;
}

.page-about .about-hero__copy h1 span {
  display: block;
  margin-top: 8px;
  font-size: 19px;
  font-weight: 500;
  color: var(--c-gold-soft);
}

.page-about .about-hero__lead {
  margin: 0 0 28px;
  max-width: 58ch;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.88);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero__meta-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid rgba(201, 162, 39, 0.38);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.07);
  font-family: var(--font-serif);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.9);
}

.page-about .about-hero__meta-num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--c-gold-soft);
}

.page-about .about-hero__index {
  margin-top: 28px;
  padding: 18px 22px;
  border: 1px solid rgba(201, 162, 39, 0.3);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
}

.page-about .about-hero__index-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-gold-soft);
}

.page-about .about-hero__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px 20px;
}

.page-about .about-hero__index-list a {
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-hero__index-list a:hover {
  border-bottom-color: var(--c-gold);
  color: var(--c-gold-soft);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  max-width: 480px;
  border-radius: var(--radius-lg);
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

.page-about .about-hero__watermark {
  position: absolute;
  top: -10px;
  right: 4px;
  z-index: 1;
  font-family: var(--font-sans);
  font-size: 96px;
  font-weight: 800;
  line-height: 1;
  color: rgba(201, 162, 39, 0.3);
  pointer-events: none;
  user-select: none;
}

/* ---------- 编辑部分栏 ---------- */
.page-about .editorial {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding-top: 44px;
  padding-bottom: 44px;
}

.page-about .editorial__aside {
  border-left: 3px solid var(--c-gold);
  padding-left: 14px;
}

.page-about .editorial__index {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-gold);
}

.page-about .editorial__label {
  margin: 0 0 6px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--c-navy);
}

.page-about .editorial__note {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-gray);
}

.page-about .editorial__body h2 {
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-size: 26px;
  color: var(--c-navy);
}

.page-about .editorial__body p {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
}

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

/* ---------- 品牌简介 ---------- */
.page-about .about-mission {
  background-color: var(--c-paper);
}

.page-about .about-mission__quote {
  margin: 24px 0;
  padding: 18px 22px;
  border-left: 4px solid var(--c-gold);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(201, 162, 39, 0.1);
}

.page-about .about-mission__quote p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-navy);
}

/* ---------- 中国站点历程 ---------- */
.page-about .about-journey {
  background-color: var(--c-white);
}

.page-about .about-journey__banner {
  margin: 28px 0 36px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-journey__banner img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 标签页 ---------- */
.page-about .about-tabs {
  margin-top: 8px;
}

.page-about .tabs__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  border-bottom: 2px solid var(--c-mist);
}

.page-about .tabs__btn {
  position: relative;
  padding: 10px 12px;
  border: none;
  border-radius: var(--radius-pill);
  background: transparent;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-gray);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.page-about .tabs__btn[aria-selected="true"] {
  background: var(--c-navy);
  color: var(--c-white);
}

.page-about .tabs__btn[aria-selected="true"]::after {
  content: none;
}

.page-about .about-tabs__panel {
  padding-top: 28px;
}

.page-about .about-tabs__panel[hidden] {
  display: none !important;
}

.page-about .about-tabs__note {
  margin: 28px 0 0;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  background: var(--c-paper);
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-gray);
}

.page-about .about-tabs__note a {
  color: var(--c-navy);
  font-weight: 700;
  text-decoration-color: var(--c-gold);
  text-underline-offset: 2px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-gold) 0%, var(--c-gold-soft) 55%, var(--c-goldgray) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 32px;
  padding-bottom: 30px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-paper);
  border: 2px solid var(--c-gold);
  box-shadow: 0 0 0 2px rgba(201, 162, 39, 0.35);
}

.page-about .about-timeline__num {
  display: inline-block;
  margin-bottom: 8px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(201, 162, 39, 0.12);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-gold);
}

.page-about .about-timeline__content h3 {
  margin: 0 0 6px;
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  color: var(--c-navy);
}

.page-about .about-timeline__content p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-gray);
}

/* ---------- 服务承诺 ---------- */
.page-about .about-promise {
  background: linear-gradient(165deg, var(--c-navy) 0%, #0d2450 100%);
  color: var(--c-white);
}

.page-about .about-promise .editorial {
  padding-bottom: 36px;
}

.page-about .about-promise .editorial__aside {
  border-left-color: var(--c-gold);
}

.page-about .about-promise .editorial__index {
  color: var(--c-gold-soft);
}

.page-about .about-promise .editorial__label {
  color: var(--c-gold-soft);
}

.page-about .about-promise .editorial__note {
  color: rgba(255, 255, 255, 0.6);
}

.page-about .about-promise .editorial__body h2 {
  color: var(--c-white);
}

.page-about .about-promise .editorial__body p {
  color: rgba(255, 255, 255, 0.82);
}

.page-about .about-promise__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding-bottom: 48px;
}

.page-about .about-promise__item {
  padding: 26px 22px;
  border: 1px solid rgba(201, 162, 39, 0.26);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.04);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-promise__item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
}

.page-about .about-promise__icon {
  width: 64px;
  height: 64px;
  margin: 0 0 14px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.page-about .about-promise__svg {
  display: block;
  width: 64px;
  height: 64px;
  margin: 0 0 14px;
  padding: 10px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  color: var(--c-gold-soft);
}

.page-about .about-promise__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: 19px;
  color: var(--c-gold-soft);
}

.page-about .about-promise__item p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.82);
}

/* ---------- 联系合作 ---------- */
.page-about .about-contact {
  background-color: var(--c-paper);
}

.page-about .about-contact__list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-contact__list li {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid var(--c-mist);
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-ink);
}

.page-about .about-contact__list li:last-child {
  border-bottom: none;
}

.page-about .about-contact__list span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-gray);
}

.page-about .about-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 平板与桌面断点 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    padding-top: 60px;
    padding-bottom: 64px;
  }

  .page-about .about-hero__copy h1 {
    font-size: 40px;
  }

  .page-about .about-hero__copy h1 span {
    font-size: 22px;
  }

  .page-about .about-hero__lead {
    font-size: 16px;
  }

  .page-about .about-hero__index-list {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-hero__watermark {
    top: -14px;
    right: 8px;
    font-size: 120px;
  }

  .page-about .editorial {
    grid-template-columns: 180px 1fr;
    gap: 36px;
    padding-top: 60px;
    padding-bottom: 60px;
  }

  .page-about .editorial__aside {
    border-left: none;
    border-top: 3px solid var(--c-gold);
    padding-left: 0;
    padding-top: 10px;
  }

  .page-about .editorial__body h2 {
    font-size: 30px;
  }

  .page-about .about-promise .editorial {
    padding-bottom: 44px;
  }

  .page-about .about-promise__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    padding-bottom: 64px;
  }

  .page-about .tabs__btn {
    padding: 12px 16px;
    font-size: 14px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 56px;
    padding-top: 72px;
    padding-bottom: 80px;
  }

  .page-about .about-hero__copy h1 {
    font-size: 46px;
  }

  .page-about .about-hero__copy h1 span {
    font-size: 24px;
  }

  .page-about .about-hero__lead {
    font-size: 17px;
  }

  .page-about .about-hero__watermark {
    font-size: 140px;
  }

  .page-about .editorial {
    grid-template-columns: 220px 1fr;
    gap: 56px;
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .page-about .editorial__body h2 {
    font-size: 32px;
  }

  .page-about .editorial__body p {
    font-size: 16px;
    max-width: 70ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about,
  .page-about .about-hero {
    animation: none;
  }

  .page-about .about-promise__item {
    transition: none;
  }

  .page-about .about-hero__index-list a,
  .page-about .tabs__btn {
    transition: none;
  }
}