/* ===== 使用说明 · 页面专属样式（作用域 .page-disclaimer） ===== */

.page-disclaimer {
  background-color: var(--ink-void);
  color: var(--text-body);
  padding-top: 1.5rem;
  padding-bottom: 4.5rem;
}

/* --- 面包屑 --- */
.page-disclaimer .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  margin: 0 0 1.75rem;
  font-family: var(--font-index);
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--text-mute);
}
.page-disclaimer .breadcrumb a {
  color: var(--flag-blue);
  text-decoration: none;
  transition: color 160ms ease;
}
.page-disclaimer .breadcrumb a:hover,
.page-disclaimer .breadcrumb a:focus-visible {
  color: var(--amber);
}

/* --- 页头 --- */
.page-disclaimer .usage-head {
  max-width: 44rem;
  margin-bottom: 2.25rem;
}
.page-disclaimer .usage-head__eyebrow {
  display: inline-block;
  margin-bottom: 1.1rem;
  padding: .35rem .6rem;
  border: var(--stroke) solid var(--ink-grid);
  font-family: var(--font-index);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--amber);
}
.page-disclaimer .usage-head h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 6.2vw, 2.7rem);
  line-height: 1.22;
  letter-spacing: .08em;
  color: var(--text-strong);
}
.page-disclaimer .usage-head__lede {
  margin: 0;
  max-width: 34em;
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--text-body);
}

/* --- 顶部横幅 --- */
.page-disclaimer .usage-banner {
  margin: 0 0 2.5rem;
  border: var(--stroke-fat) solid var(--ink-grid);
  background-color: var(--ink-archive);
  box-shadow: var(--hard-shadow);
}
.page-disclaimer .usage-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* --- 段落锚点 --- */
.page-disclaimer .usage-jump {
  display: flex;
  gap: .5rem;
  overflow-x: auto;
  margin: 0 0 2.75rem;
  padding: 0 0 1rem;
  border-bottom: var(--stroke) solid var(--ink-grid);
}
.page-disclaimer .usage-jump a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .45rem .75rem;
  border: var(--stroke) solid var(--ink-grid);
  color: var(--text-body);
  font-size: .875rem;
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}
.page-disclaimer .usage-jump a .mono {
  font-family: var(--font-index);
  font-size: .7rem;
  color: var(--text-mute);
  transition: color 160ms ease;
}
.page-disclaimer .usage-jump a:hover,
.page-disclaimer .usage-jump a:focus-visible {
  border-color: var(--amber);
  background-color: var(--ink-archive);
  color: var(--text-strong);
}
.page-disclaimer .usage-jump a:hover .mono,
.page-disclaimer .usage-jump a:focus-visible .mono {
  color: var(--amber);
}

/* --- 章节与刻度分隔线 --- */
.page-disclaimer .usage-section {
  --rule-tone: var(--ink-grid);
  margin-bottom: 3.25rem;
}
.page-disclaimer .usage-section--blue { --rule-tone: var(--flag-blue); }
.page-disclaimer .usage-section--yellow { --rule-tone: var(--flag-yellow); }
.page-disclaimer .usage-section--red { --rule-tone: var(--flag-red); }
.page-disclaimer .usage-section--green { --rule-tone: var(--flag-green); }
.page-disclaimer .usage-section--amber { --rule-tone: var(--amber); }

.page-disclaimer .rule {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.6rem;
}
.page-disclaimer .rule__no {
  font-family: var(--font-index);
  font-size: .75rem;
  letter-spacing: .2em;
  color: var(--rule-tone);
}
.page-disclaimer .rule__line {
  position: relative;
  display: block;
  height: 10px;
  border-top: var(--stroke) solid var(--rule-tone);
}
.page-disclaimer .rule__line::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 7px;
  background-image: repeating-linear-gradient(to right, var(--rule-tone) 0 1px, transparent 1px 18px);
  opacity: .5;
}

/* --- 章节正文 --- */
.page-disclaimer .usage-section__body h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: .1em;
  color: var(--text-strong);
}
.page-disclaimer .usage-section__body p {
  margin: 0 0 1.05rem;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-body);
}
.page-disclaimer .usage-section__body p:last-child {
  margin-bottom: 0;
}
.page-disclaimer .usage-section__body a {
  color: var(--flag-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-disclaimer .usage-section__body a:hover,
.page-disclaimer .usage-section__body a:focus-visible {
  color: var(--amber);
}

/* --- 六类技术统计列表 --- */
.page-disclaimer .spec-list {
  list-style: none;
  margin: 1.4rem 0 1.4rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .5rem;
  max-width: 34em;
}
.page-disclaimer .spec-list li {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  padding: .6rem .7rem;
  border-left: var(--stroke) solid var(--flag-blue);
  background-color: var(--ink-archive);
  font-size: .9rem;
  line-height: 1.6;
  color: var(--text-body);
}
.page-disclaimer .spec-list .mono {
  font-family: var(--font-index);
  font-size: .68rem;
  color: var(--flag-blue);
}

/* --- 引用示例块 --- */
.page-disclaimer .cite-sample {
  margin: 1.5rem 0 1.4rem;
  max-width: 34em;
  border: var(--stroke) solid var(--ink-grid);
  border-left: 4px solid var(--amber);
  background-color: var(--ink-archive);
}
.page-disclaimer .cite-sample__label {
  padding: .65rem .95rem;
  border-bottom: var(--stroke) dashed var(--ink-grid);
  font-family: var(--font-index);
  font-size: .68rem;
  letter-spacing: .2em;
  color: var(--amber);
}
.page-disclaimer .cite-sample__body {
  margin: 0;
  padding: .95rem;
  font-family: var(--font-index);
  font-size: .85rem;
  line-height: 1.9;
  color: var(--text-body);
  white-space: pre-wrap;
  overflow-x: auto;
  user-select: all;
}

/* --- 访问数据长条 --- */
.page-disclaimer .access-stats {
  list-style: none;
  margin: 1.5rem 0 1.4rem;
  padding: 0;
  max-width: 34em;
  display: grid;
  grid-template-columns: 1fr;
  border: var(--stroke) solid var(--ink-grid);
  background-color: var(--ink-archive);
}
.page-disclaimer .access-stats li {
  padding: .9rem 1.1rem;
  border-top: var(--stroke) solid var(--ink-grid);
}
.page-disclaimer .access-stats li:first-child {
  border-top: 0;
}
.page-disclaimer .access-stats .stat {
  display: block;
}
.page-disclaimer .access-stats .stat__value {
  display: block;
  font-family: var(--font-index);
  font-size: 1.55rem;
  line-height: 1.1;
  color: var(--text-strong);
}
.page-disclaimer .access-stats .stat__unit {
  display: block;
  margin-top: .4rem;
  font-size: .78rem;
  line-height: 1.5;
  color: var(--text-mute);
}

/* --- 行动按钮组 --- */
.page-disclaimer .usage-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.5rem;
}

/* --- 底部双入口 --- */
.page-disclaimer .usage-exits {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: var(--stroke-fat) solid var(--ink-grid);
}
.page-disclaimer .usage-exits__heading {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: .12em;
  color: var(--text-strong);
}
.page-disclaimer .usage-exits__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.page-disclaimer .exit-card {
  position: relative;
  display: grid;
  gap: .45rem;
  padding: 1.2rem 1.2rem 1.2rem 1.6rem;
  border: var(--stroke) solid var(--ink-grid);
  background-color: var(--ink-archive);
  text-decoration: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}
.page-disclaimer .exit-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 6px;
  background-color: var(--card-tone, var(--flag-blue));
  transition: width 160ms ease;
}
.page-disclaimer .exit-card:hover,
.page-disclaimer .exit-card:focus-visible {
  border-color: var(--card-tone, var(--flag-blue));
  box-shadow: var(--hard-shadow-sm);
}
.page-disclaimer .exit-card:hover::before,
.page-disclaimer .exit-card:focus-visible::before {
  width: 14px;
}
.page-disclaimer .exit-card__no {
  font-family: var(--font-index);
  font-size: .7rem;
  letter-spacing: .2em;
  color: var(--card-tone, var(--flag-blue));
}
.page-disclaimer .exit-card__name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: .08em;
  color: var(--text-strong);
}
.page-disclaimer .exit-card__desc {
  font-size: .92rem;
  line-height: 1.8;
  color: var(--text-mute);
}
.page-disclaimer .exit-card--blue { --card-tone: var(--flag-blue); }
.page-disclaimer .exit-card--yellow { --card-tone: var(--flag-yellow); }

/* --- 焦点态 --- */
.page-disclaimer a:focus-visible,
.page-disclaimer button:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

/* --- 滚动显现 --- */
.has-js .page-disclaimer [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
}
.has-js .page-disclaimer [data-reveal].is-in {
  opacity: 1;
  transform: none;
  transition: opacity 320ms ease, transform 420ms ease;
}

/* --- 断点：平板 --- */
@media (min-width: 640px) {
  .page-disclaimer .access-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-disclaimer .access-stats li {
    border-top: 0;
    border-left: var(--stroke) solid var(--ink-grid);
  }
  .page-disclaimer .access-stats li:first-child {
    border-left: 0;
  }
  .page-disclaimer .usage-exits__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* --- 断点：桌面 --- */
@media (min-width: 1000px) {
  .page-disclaimer {
    padding-top: 2.5rem;
    padding-bottom: 5.5rem;
  }
  .page-disclaimer .usage-head {
    max-width: 46rem;
  }
  .page-disclaimer .usage-section__body {
    padding-left: 96px;
  }
  .page-disclaimer .spec-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-disclaimer .usage-section {
    margin-bottom: 3.75rem;
  }
}

/* --- 降低动效 --- */
@media (prefers-reduced-motion: reduce) {
  .has-js .page-disclaimer [data-reveal],
  .has-js .page-disclaimer [data-reveal].is-in {
    opacity: 1;
    transform: none;
    transition: opacity 120ms linear;
  }
  .page-disclaimer .exit-card,
  .page-disclaimer .exit-card::before,
  .page-disclaimer .usage-jump a {
    transition: none;
  }
}