.page-disclaimer {
  --clause-gap: clamp(24px, 4vw, 40px);
  --index-col: 88px;
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-disclaimer .breadcrumbs {
  padding-top: clamp(20px, 4vw, 36px);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  padding-top: clamp(28px, 5vw, 52px);
  padding-bottom: clamp(24px, 4vw, 40px);
}

.page-disclaimer .usage-hero__title {
  margin: 10px 0 0;
  color: var(--text);
}

.page-disclaimer .usage-hero__lead {
  margin-top: 20px;
  max-width: 34em;
}

.page-disclaimer .usage-status {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: linear-gradient(120deg, rgba(16, 37, 68, 0.9), rgba(10, 23, 48, 0.6));
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--gold);
  width: fit-content;
  max-width: 100%;
}

.page-disclaimer .usage-status__sep {
  color: var(--line);
}

.page-disclaimer .usage-hero__aside {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-disclaimer .usage-hero__media {
  border-color: var(--line);
}

.page-disclaimer .usage-hero__media .media-frame__inner img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-disclaimer .usage-hero__aside .media-caption {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 30em;
}

/* ---------- 条款目录 ---------- */
.page-disclaimer .usage-toc {
  margin-top: clamp(20px, 4vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(16, 37, 68, 0.5);
  overflow: hidden;
}

.page-disclaimer .usage-toc > summary {
  cursor: pointer;
  list-style: none;
  padding: 14px 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  border-bottom: 1px solid transparent;
  transition: background 0.3s var(--ease);
}

.page-disclaimer .usage-toc > summary::-webkit-details-marker {
  display: none;
}

.page-disclaimer .usage-toc > summary::after {
  content: "＋";
  float: right;
  color: var(--mist);
  font-size: 14px;
}

.page-disclaimer .usage-toc[open] > summary {
  border-bottom-color: var(--line);
}

.page-disclaimer .usage-toc[open] > summary::after {
  content: "－";
}

.page-disclaimer .usage-toc > summary:hover,
.page-disclaimer .usage-toc > summary:focus-visible {
  background: rgba(44, 229, 214, 0.07);
  outline: none;
}

.page-disclaimer .usage-toc__list {
  list-style: none;
  margin: 0;
  padding: 8px 0;
  display: grid;
}

.page-disclaimer .usage-toc__list a {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 20px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 15px;
  border-left: 2px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-disclaimer .usage-toc__list a .mono {
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-disclaimer .usage-toc__list a:hover,
.page-disclaimer .usage-toc__list a:focus-visible {
  color: var(--text);
  background: rgba(44, 229, 214, 0.06);
  border-left-color: var(--cyan);
  outline: none;
}

/* ---------- 条款正文 ---------- */
.page-disclaimer .usage-sheet {
  margin-top: clamp(32px, 6vw, 64px);
  border-top: 1px solid var(--line);
  background-image:
    linear-gradient(to right, rgba(30, 58, 99, 0.28) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 58, 99, 0.2) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: -1px -1px;
}

.page-disclaimer .usage-clause {
  display: grid;
  gap: 14px;
  padding: var(--clause-gap) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-disclaimer .usage-clause:last-child {
  border-bottom: none;
}

.page-disclaimer .usage-clause__index {
  font-size: clamp(40px, 9vw, 62px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: rgba(44, 229, 214, 0.32);
  margin: 0;
}

.page-disclaimer .usage-clause__body h2 {
  margin: 0 0 12px;
  font-size: clamp(20px, 3vw, 26px);
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-disclaimer .usage-clause__body > p {
  margin: 0 0 18px;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-disclaimer .clause-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  max-width: 40em;
}

.page-disclaimer .clause-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-disclaimer .clause-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-disclaimer .clause-list a {
  color: var(--cyan-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-disclaimer .clause-list a:hover,
.page-disclaimer .clause-list a:focus-visible {
  color: var(--cyan);
  outline: none;
}

.page-disclaimer .usage-callout {
  margin-top: 20px;
  background: rgba(16, 37, 68, 0.55);
}

.page-disclaimer .usage-callout p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 38em;
}

/* 边界条目 */
.page-disclaimer .usage-clause--boundary {
  padding-left: clamp(14px, 3vw, 26px);
  border-left: 2px solid var(--red);
  background: linear-gradient(90deg, rgba(224, 96, 78, 0.1), rgba(224, 96, 78, 0) 62%);
}

.page-disclaimer .usage-clause--boundary .usage-clause__index {
  color: rgba(224, 96, 78, 0.42);
  -webkit-text-stroke: 0;
}

.page-disclaimer .clause-list--boundary li::before {
  width: 12px;
  background: var(--red);
}

/* 纠错反馈 */
.page-disclaimer .usage-feedback {
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  border-radius: var(--radius);
  background: rgba(16, 37, 68, 0.6);
  padding: 16px 20px;
  margin-bottom: 20px;
  max-width: 40em;
}

.page-disclaimer .usage-feedback__mail {
  margin: 0 0 8px;
  font-size: 16px;
  letter-spacing: 0.02em;
  color: var(--gold);
  word-break: break-all;
}

.page-disclaimer .usage-feedback__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* 变更记录 */
.page-disclaimer .change-log {
  list-style: none;
  margin: 0;
  padding: 0 0 0 18px;
  border-left: 1px solid var(--line);
  display: grid;
  gap: 18px;
}

.page-disclaimer .change-log__item {
  position: relative;
  display: grid;
  gap: 6px;
}

.page-disclaimer .change-log__item::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 6px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 1px solid var(--cyan);
}

.page-disclaimer .change-log__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
  max-width: 36em;
}

.page-disclaimer .change-log__item .tag {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

/* ---------- 收束索引 ---------- */
.page-disclaimer .usage-index {
  margin-top: clamp(36px, 6vw, 64px);
  padding: 20px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 10px;
}

.page-disclaimer .usage-index a {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-disclaimer .usage-index a:hover,
.page-disclaimer .usage-index a:focus-visible {
  color: var(--cyan);
  transform: translateX(4px);
  outline: none;
}

.page-disclaimer .usage-tail {
  margin: 16px 0 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* 焦点可见性 */
.page-disclaimer a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-disclaimer .usage-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 28px;
  }
}

@media (min-width: 900px) {
  .page-disclaimer .usage-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }

  .page-disclaimer .usage-hero__aside {
    margin-top: 34px;
  }

  .page-disclaimer .usage-clause {
    grid-template-columns: var(--index-col) minmax(0, 1fr);
    gap: 32px;
  }

  .page-disclaimer .usage-clause--boundary {
    padding-left: clamp(20px, 3vw, 34px);
  }

  .page-disclaimer .usage-index {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-index a,
  .page-disclaimer .usage-toc__list a {
    transition: none;
  }

  .page-disclaimer .usage-index a:hover,
  .page-disclaimer .usage-index a:focus-visible {
    transform: none;
  }
}
</style>