.page-about {
  --about-hero-bg: #EFDCB8;
  --about-card-bg: #FFF9F0;
  --about-accent-deep: #5C3A21;
  --about-line: rgba(139, 90, 43, 0.18);
  --about-youth-bg: #FDF4DF;
  --about-transition-bg: #8B5A2B;
  background-color: var(--page-bg);
  font-family: var(--body-font);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}
.page-about .container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
.page-about a {
  color: var(--accent);
  text-decoration: none;
}
.page-about img {
  max-width: 100%;
  height: auto;
}
.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--title-font);
  font-weight: 600;
  margin: 0;
  line-height: 1.35;
}
.page-about p {
  margin: 0;
}

/* ===== 页首窄带 ===== */
.page-about .about-hero {
  background: linear-gradient(180deg, #E8CFa6 0%, #F4E4CC 100%);
  border-bottom: 2px solid var(--border);
  padding: 28px 0 36px;
  position: relative;
  background-image: url("{zhanqunpic:h:200w:1260}");
  background-size: cover;
  background-position: center 20%;
  background-repeat: no-repeat;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(244, 228, 204, 0.95) 0%, rgba(244, 228, 204, 0.82) 55%, rgba(232, 207, 166, 0.7) 100%);
  pointer-events: none;
}
.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}
.page-about .breadcrumb {
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 18px;
  display: flex;
  gap: 6px;
  letter-spacing: 0.04em;
}
.page-about .breadcrumb a:hover {
  text-decoration: underline;
}
.page-about .about-hero__inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.page-about .about-hero__copy {
  flex: 1 1 420px;
}
.page-about .about-hero__copy h1 {
  font-size: clamp(26px, 3.2vw, 38px);
  color: var(--accent);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}
.page-about .about-hero__copy p {
  font-size: 16px;
  max-width: 720px;
  color: var(--text-primary);
}
.page-about .about-hero__badge {
  flex: 0 0 auto;
  background: var(--card-bg);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  box-shadow: var(--shadow-sm);
  transform: rotate(2deg);
  min-width: 170px;
  position: relative;
}
.page-about .about-hero__badge::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 6px;
  right: 6px;
  bottom: 6px;
  border: 1px dashed rgba(139, 90, 43, 0.25);
  border-radius: 22px;
  pointer-events: none;
}
.page-about .about-hero__version {
  font-family: var(--title-font);
  font-size: 30px;
  color: var(--status-new);
  font-weight: 700;
  line-height: 1;
}
.page-about .about-hero__label {
  font-size: 13px;
  color: var(--accent);
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
}
.page-about .about-hero__edition {
  font-size: 12px;
  color: var(--status-updating);
  margin-top: 4px;
}
.page-about .about-seal {
  position: absolute;
  right: 40px;
  bottom: -16px;
  background: var(--accent);
  color: #FDF4E3;
  border-radius: var(--radius-sm);
  padding: 6px 14px 6px 12px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  transform: rotate(-3deg);
  box-shadow: var(--shadow-md);
  z-index: 2;
}
.page-about .about-seal span {
  font-family: var(--title-font);
  font-size: 18px;
  letter-spacing: 0.06em;
}
.page-about .about-seal small {
  font-size: 11px;
  opacity: 0.85;
}

/* ===== 公共区块头 ===== */
.page-about .about-section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding-top: 8px;
}
.page-about .about-section-head .seq-num {
  flex: 0 0 auto;
}
.page-about .about-section-head h2 {
  font-size: clamp(22px, 2.4vw, 30px);
  color: var(--accent);
}
.page-about .about-section-head p {
  flex: 1 1 100%;
  font-size: 15px;
  color: rgba(62, 43, 30, 0.85);
  max-width: 760px;
  padding-left: 46px;
  margin-top: -6px;
}
.page-about .seq-num {
  background: var(--accent);
  color: #FFF9F0;
  border-radius: var(--radius-pill);
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--title-font);
  font-size: 16px;
  font-weight: 700;
  flex: 0 0 34px;
}

/* ===== 收录范围 ===== */
.page-about .about-scope {
  background: #F4E4CC;
  padding: 48px 0 56px;
  position: relative;
  background-image: linear-gradient(rgba(139, 90, 43, 0.04) 1px, transparent 1px);
  background-size: 100% 28px;
}
.page-about .about-scope__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
}
.page-about .about-scope__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-about .about-scope__list li {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 18px 18px 56px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.page-about .about-scope__list li:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.page-about .about-scope__num {
  position: absolute;
  left: 14px;
  top: 18px;
  font-family: var(--title-font);
  font-size: 22px;
  color: var(--accent);
  opacity: 0.7;
}
.page-about .about-scope__list h3 {
  font-size: 18px;
  color: var(--accent);
  margin-bottom: 6px;
}
.page-about .about-scope__list p {
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(62, 43, 30, 0.88);
}
.page-about .about-scope__metrics {
  background: #EAD2A8;
  border-radius: var(--radius-lg);
  padding: 22px;
  border: 1px solid var(--border);
  position: relative;
}
.page-about .metric-bar {
  display: grid;
  gap: 14px;
  margin-bottom: 14px;
}
.page-about .metric-bar__item {
  background: rgba(255, 248, 239, 0.7);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  display: grid;
  grid-template-columns: 80px 1fr;
  column-gap: 12px;
  row-gap: 4px;
  align-items: center;
  border: 1px solid rgba(139, 90, 43, 0.15);
}
.page-about .metric-bar__value {
  font-family: var(--title-font);
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.page-about .metric-bar__label {
  font-size: 12.5px;
  color: rgba(62, 43, 30, 0.8);
}
.page-about .metric-bar__track {
  grid-column: 1 / -1;
  height: 6px;
  background: rgba(139, 90, 43, 0.1);
  border-radius: var(--radius-pill);
  display: block;
  overflow: hidden;
}
.page-about .metric-bar__track i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #C4884C);
  border-radius: var(--radius-pill);
}
.page-about .about-scope__texture {
  width: 100%;
  border-radius: var(--radius-md);
  object-fit: cover;
  display: block;
  margin-top: 10px;
  opacity: 0.75;
  border: 1px solid rgba(139, 90, 43, 0.1);
}

/* ===== 分类层级 ===== */
.page-about .about-taxonomy {
  background: #FDF4DF;
  padding: 52px 0 60px;
  position: relative;
}
.page-about .about-taxonomy::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #F4A460 0%, #8FBC8F 25%, #87CEEB 50%, #DDA0DD 75%, #8B5A2B 100%);
}
.page-about .about-tree {
  background: #FFF8EF;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 18px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}
.page-about .about-tree__trunk {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  background: var(--accent);
  color: #FFF9F0;
  border-radius: var(--radius-pill);
  padding: 10px 24px;
  width: max-content;
  max-width: 100%;
  margin: 0 auto 20px;
  font-family: var(--title-font);
  position: relative;
}
.page-about .about-tree__trunk::after {
  content: "";
  position: absolute;
  bottom: -18px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 10px solid var(--accent);
}
.page-about .about-tree__trunk-label {
  font-size: 18px;
  letter-spacing: 0.08em;
}
.page-about .about-tree__trunk-num {
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-pill);
  padding: 2px 12px;
  font-size: 16px;
}
.page-about .about-tree__branches {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.page-about .about-tree__branch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 16px 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-align: center;
}
.page-about .about-tree__branch:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.page-about .about-tree__branch--childhood {
  background: #F4A460;
}
.page-about .about-tree__branch--youth {
  background: #8FBC8F;
}
.page-about .about-tree__branch--family {
  background: #87CEEB;
}
.page-about .about-tree__branch--travel {
  background: #DDA0DD;
}
.page-about .about-tree__branch--transition {
  background: #B08968;
}
.page-about .about-tree__branch-name {
  font-family: var(--title-font);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}
.page-about .about-tree__branch-num {
  font-size: 13px;
  color: rgba(62, 43, 30, 0.85);
  background: rgba(255, 248, 239, 0.55);
  border-radius: var(--radius-pill);
  padding: 2px 10px;
}
.page-about .about-tree__branch-tags {
  font-size: 12px;
  color: rgba(62, 43, 30, 0.75);
  border-top: 1px dashed rgba(62, 43, 30, 0.2);
  padding-top: 6px;
  margin-top: 4px;
  width: 100%;
  display: block;
}
.page-about .about-tag-demo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: center;
  background: #FFF8EF;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}
.page-about .about-tag-demo__img {
  width: 100%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  object-fit: cover;
}
.page-about .about-tag-demo__legend h3 {
  font-size: 20px;
  color: var(--accent);
  margin-bottom: 12px;
}
.page-about .about-tag-demo__legend ul {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .about-tag-demo__legend li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}
.page-about .about-tag-demo__legend .tag {
  min-width: 74px;
  text-align: center;
}
.page-about .about-tag-demo__legend p {
  font-size: 14px;
  color: rgba(62, 43, 30, 0.85);
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

/* ===== 更新机制 ===== */
.page-about .about-update {
  background: #EAD2A8;
  padding: 52px 0 60px;
  position: relative;
}
.page-about .about-update__layout {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 28px;
  align-items: start;
}
.page-about .about-update__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.page-about .about-update__steps li {
  background: #FFF8EF;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 12px 14px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  position: relative;
}
.page-about .about-update__steps li::after {
  content: "→";
  position: absolute;
  right: -12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 20px;
  font-weight: 700;
  z-index: 2;
}
.page-about .about-update__steps li:last-child::after {
  display: none;
}
.page-about .about-update__steps .seq-num {
  margin: 0 auto 10px;
  background: var(--status-updating);
}
.page-about .about-update__steps h3 {
  font-size: 18px;
  color: var(--accent);
  margin-bottom: 6px;
}
.page-about .about-update__steps p {
  font-size: 12px;
  line-height: 1.6;
  color: rgba(62, 43, 30, 0.8);
}
.page-about .about-update__aside {
  display: grid;
  gap: 16px;
}
.page-about .about-update__img {
  width: 100%;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 1px solid rgba(139, 90, 43, 0.15);
  box-shadow: var(--shadow-sm);
}
.page-about .about-update__note {
  background: #FFF8EF;
  border-left: 4px solid var(--status-updating);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}
.page-about .about-update__note h3 {
  font-size: 17px;
  color: var(--accent);
  margin-bottom: 6px;
}
.page-about .about-update__note p {
  font-size: 14px;
  line-height: 1.65;
}
.page-about .about-update__status {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ===== 版本对照 ===== */
.page-about .about-versions {
  background: #D9C4A5;
  padding: 52px 0 56px;
  position: relative;
}
.page-about .about-versions__table-wrap {
  background: #FFF8EF;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 12px;
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}
.page-about .compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 14px;
  min-width: 640px;
}
.page-about .compare-table th,
.page-about .compare-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}
.page-about .compare-table thead th {
  background: var(--accent);
  color: #FFF9F0;
  font-family: var(--title-font);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.03em;
}
.page-about .compare-table thead th:first-child {
  border-radius: var(--radius-sm) 0 0 0;
  width: 160px;
}
.page-about .compare-table thead th:nth-child(2) {
  background: #6E4426;
}
.page-about .compare-table thead th:last-child {
  background: #5F5A55;
  border-radius: 0 var(--radius-sm) 0 0;
}
.page-about .compare-table tbody th {
  font-weight: 600;
  background: rgba(217, 196, 165, 0.35);
  color: var(--accent);
  font-size: 13.5px;
  letter-spacing: 0.05em;
}
.page-about .compare-table tbody td {
  color: var(--text-primary);
}
.page-about .compare-table tbody tr:last-child th,
.page-about .compare-table tbody tr:last-child td {
  border-bottom: none;
}
.page-about .about-versions__hint {
  margin-top: 12px;
  font-size: 13.5px;
  color: rgba(62, 43, 30, 0.8);
  background: rgba(255, 248, 239, 0.4);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  display: inline-block;
}

/* ===== 检索与筛选 ===== */
.page-about .about-search {
  background: #F4E4CC;
  padding: 52px 0 60px;
}
.page-about .about-search__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.page-about .about-search__item {
  background: #FFF8EF;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.page-about .about-search__item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.page-about .about-search__tag {
  position: absolute;
  top: -12px;
  left: 12px;
  font-size: 12px;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  position: relative;
  top: auto;
  left: auto;
  align-self: flex-start;
}
.page-about .about-search__item h3 {
  font-size: 20px;
  color: var(--accent);
  margin-top: -4px;
}
.page-about .about-search__item p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(62, 43, 30, 0.88);
  flex: 1;
}
.page-about .about-search__example {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  border-top: 1px dashed rgba(139, 90, 43, 0.25);
  border-bottom: 1px dashed rgba(139, 90, 43, 0.25);
  padding: 10px 0;
  min-height: 40px;
}
.page-about .about-search__album {
  background: #EAD2A8;
  border-radius: var(--radius-pill);
  padding: 4px 12px;
  font-size: 12.5px;
  color: var(--accent);
  border: 1px solid var(--border);
}
.page-about .about-search__arrow {
  font-family: var(--title-font);
  font-size: 22px;
  color: var(--accent);
}
.page-about .about-search__item .btn {
  align-self: flex-start;
  margin-top: 4px;
  font-size: 13px;
  border-radius: var(--radius-pill);
  padding: 6px 16px;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  transition: background 0.25s ease, color 0.25s ease;
}
.page-about .about-search__item .btn:hover {
  background: var(--accent);
  color: #FFF9F0;
}

/* ===== 底部快捷入口 ===== */
.page-about .about-guide {
  background: linear-gradient(90deg, #5C3A21 0%, #7A4E2D 100%);
  padding: 44px 0 52px;
}
.page-about .about-guide__inner {
  background: rgba(255, 248, 239, 0.08);
  border: 1px solid rgba(255, 248, 239, 0.18);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
}
.page-about .about-guide h2 {
  font-size: clamp(20px, 2vw, 28px);
  color: #FDF4E3;
  margin-bottom: 6px;
}
.page-about .about-guide p {
  font-size: 14px;
  color: rgba(253, 244, 227, 0.8);
}
.page-about .about-guide__links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.page-about .about-guide__link {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 248, 239, 0.12);
  border: 1px solid rgba(255, 248, 239, 0.22);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  color: #FDF4E3;
  transition: background 0.25s ease, transform 0.25s ease;
}
.page-about .about-guide__link:hover {
  background: rgba(255, 248, 239, 0.26);
  transform: translateY(-2px);
  color: #FFF;
}
.page-about .about-guide__icon {
  font-size: 26px;
  line-height: 1;
  color: var(--status-updating);
}
.page-about .about-guide__link strong {
  display: block;
  font-family: var(--title-font);
  font-size: 16px;
}
.page-about .about-guide__link small {
  display: block;
  font-size: 12px;
  opacity: 0.8;
}

/* ===== 标签与徽标（页面内复用） ===== */
.page-about .tag {
  display: inline-block;
  border-radius: var(--radius-pill);
  padding: 3px 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}
.page-about .tag--60s {
  background: var(--tag-60s);
}
.page-about .tag--70s {
  background: var(--tag-70s);
}
.page-about .tag--80s {
  background: var(--tag-80s);
}
.page-about .tag--90s {
  background: var(--tag-90s);
}
.page-about .status-badge {
  display: inline-block;
  border-radius: var(--radius-pill);
  padding: 3px 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.page-about .status-badge--new {
  background: var(--status-new);
  color: #FFF;
}
.page-about .status-badge--archived {
  background: var(--status-archived);
  color: #FFF;
}
.page-about .status-badge--updating {
  background: var(--status-updating);
  color: var(--text-primary);
}
.page-about .btn {
  display: inline-block;
  font-family: var(--body-font);
  font-weight: 600;
  border-radius: var(--radius-pill);
  transition: all 0.25s ease;
  cursor: pointer;
}
.page-about .btn--primary {
  background: var(--accent);
  color: #FFF9F0;
  border: 1px solid var(--accent);
  padding: 10px 24px;
}
.page-about .btn--primary:hover {
  background: var(--text-primary);
  border-color: var(--text-primary);
}
.page-about .btn--compact {
  border-radius: var(--radius-pill);
  padding: 6px 16px;
  font-size: 13px;
}

/* ===== 数据揭示动画 ===== */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 窄屏适配 ===== */
@media (max-width: 900px) {
  .page-about .about-scope__layout,
  .page-about .about-tag-demo,
  .page-about .about-update__layout {
    grid-template-columns: 1fr;
  }
  .page-about .about-tree__branches {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-tree__branch--transition {
    grid-column: 1 / -1;
  }
  .page-about .about-update__steps {
    grid-template-columns: 1fr;
  }
  .page-about .about-update__steps li::after {
    display: none;
  }
  .page-about .about-search__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-guide__inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .page-about .about-hero__badge {
    min-width: 140px;
  }
}

@media (max-width: 560px) {
  .page-about .about-search__grid {
    grid-template-columns: 1fr;
  }
  .page-about .about-tree__branches {
    grid-template-columns: 1fr;
  }
  .page-about .about-tree__branch--transition {
    grid-column: auto;
  }
  .page-about .about-hero__inner {
    flex-direction: column;
  }
  .page-about .about-hero__badge {
    align-self: flex-end;
    transform: rotate(0deg);
  }
  .page-about .about-section-head p {
    padding-left: 0;
  }
  .page-about .about-guide__links {
    flex-direction: column;
    width: 100%;
  }
  .page-about .about-guide__link {
    width: 100%;
  }
  .page-about .about-versions__table-wrap {
    margin-left: -8px;
    margin-right: -8px;
    border-radius: var(--radius-sm);
  }
}
</main>

.page-about {
  --line: currentColor;
}