.page-disclaimer {
  position: relative;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(199, 205, 212, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(199, 205, 212, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  color: var(--silver);
  overflow-x: hidden;
}

.page-disclaimer .breadcrumb {
  padding-block: 1.3rem 0.5rem;
}

/* ===== 页首 ===== */
.page-disclaimer .usage-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: var(--line-gold);
  margin-top: 0.6rem;
}

.page-disclaimer .usage-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.36;
  filter: grayscale(0.35) contrast(1.08) brightness(0.78);
}

.page-disclaimer .usage-hero__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(100deg, rgba(11, 13, 16, 0.95) 6%, rgba(11, 13, 16, 0.72) 48%, rgba(11, 13, 16, 0.42) 100%),
    radial-gradient(120% 90% at 88% 6%, rgba(184, 137, 59, 0.2), transparent 62%);
}

.page-disclaimer .usage-hero__inner {
  position: relative;
  padding-block: clamp(2.6rem, 7vw, 5.2rem) clamp(2.2rem, 5vw, 3.6rem);
}

.page-disclaimer .usage-hero__inner > * {
  max-width: 58rem;
}

.page-disclaimer .usage-hero__title {
  margin: 0.9rem 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.6rem, 7.5vw, 4.8rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--ivory);
}

.page-disclaimer .usage-hero__title::after {
  content: "";
  display: block;
  width: 4.6rem;
  height: 3px;
  margin-top: 1.2rem;
  background: linear-gradient(90deg, var(--gold), var(--copper) 58%, transparent);
}

.page-disclaimer .usage-hero__lede {
  margin: 1.4rem 0 0;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  line-height: 1.82;
  color: var(--silver);
}

.page-disclaimer .usage-hero__meta {
  list-style: none;
  margin: 1.9rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 2.2rem;
}

.page-disclaimer .usage-hero__meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--mist);
}

.page-disclaimer .usage-hero__meta .mono {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

/* ===== 文档主体：左索引 + 右正文 ===== */
.page-disclaimer .usage-doc__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3rem);
  padding-block: clamp(2.4rem, 6vw, 4.2rem) clamp(3rem, 7vw, 5.5rem);
}

@media (min-width: 960px) {
  .page-disclaimer .usage-doc__inner {
    grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 5rem);
  }
}

.page-disclaimer .usage-index {
  align-self: start;
  padding-left: 1.1rem;
  border-left: 1px solid rgba(184, 137, 59, 0.35);
}

@media (min-width: 960px) {
  .page-disclaimer .usage-index {
    position: sticky;
    top: 1.5rem;
  }
}

.page-disclaimer .usage-index__title {
  margin: 0 0 0.9rem;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-disclaimer .usage-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
}

.page-disclaimer .usage-index__link {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.5rem;
  align-items: baseline;
  padding: 0.5rem 0.4rem 0.5rem 0;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--graphite);
  text-decoration: none;
  border-bottom: 1px solid rgba(199, 205, 212, 0.08);
  transition: color 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.page-disclaimer .usage-index__link:hover,
.page-disclaimer .usage-index__link:focus-visible {
  color: var(--copper);
  padding-left: 0.45rem;
}

.page-disclaimer .usage-index__num {
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--gold-dark);
  transition: color 0.25s var(--ease);
}

.page-disclaimer .usage-index__link:hover .usage-index__num,
.page-disclaimer .usage-index__link:focus-visible .usage-index__num {
  color: var(--gold);
}

.page-disclaimer .usage-index__note {
  margin: 1.2rem 0 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--graphite);
}

/* ===== 章节 ===== */
.page-disclaimer .usage-body {
  display: grid;
  min-width: 0;
}

.page-disclaimer .clause {
  padding-block: clamp(1.8rem, 4vw, 2.8rem);
  scroll-margin-top: 1.5rem;
}

.page-disclaimer .clause:first-child {
  padding-top: 0;
}

.page-disclaimer .clause + .clause {
  border-top: 1px solid rgba(199, 205, 212, 0.1);
}

.page-disclaimer .clause__head {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 0.6rem 1rem;
  align-items: baseline;
}

.page-disclaimer .clause__num {
  font-size: 0.86rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-disclaimer .clause__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.3rem, 2.6vw, 1.85rem);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--ivory);
}

.page-disclaimer .clause__body > p {
  margin: 1.2rem 0 0;
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.82;
  color: var(--silver);
}

/* ===== 条款条目 ===== */
.page-disclaimer .terms {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
}

.page-disclaimer .terms__item {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 0.45rem 1rem;
  padding-block: 0.95rem;
  border-top: 1px solid rgba(199, 205, 212, 0.08);
}

.page-disclaimer .terms__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-disclaimer .terms__idx {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--mist);
  padding-top: 0.3rem;
}

.page-disclaimer .terms__text {
  margin: 0;
  max-width: 66ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-disclaimer .terms__text strong {
  color: var(--ivory);
  font-weight: 600;
}

.page-disclaimer .usage-link {
  color: var(--copper);
  text-decoration: none;
  border-bottom: 1px solid rgba(217, 168, 92, 0.45);
  padding-bottom: 1px;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-disclaimer .usage-link:hover,
.page-disclaimer .usage-link:focus-visible {
  color: var(--ivory);
  border-bottom-color: var(--ivory);
}

/* ===== 提示块 ===== */
.page-disclaimer .notice {
  margin-top: 1.5rem;
  max-width: 68ch;
  padding: 1.05rem 1.2rem 1.1rem;
  background: rgba(20, 24, 29, 0.88);
  border: 1px solid rgba(199, 205, 212, 0.1);
  border-left: 3px solid var(--gold);
}

.page-disclaimer .notice--alert {
  background: rgba(32, 19, 19, 0.7);
  border-left-color: var(--alert);
}

.page-disclaimer .notice--ivory {
  background: var(--ivory);
  border-color: rgba(11, 13, 16, 0.14);
  border-left-color: var(--gold-dark);
}

.page-disclaimer .notice__tag {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-disclaimer .notice--alert .notice__tag {
  color: var(--alert);
}

.page-disclaimer .notice--ivory .notice__tag {
  color: var(--gold-dark);
}

.page-disclaimer .notice p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.76;
  color: var(--silver);
}

.page-disclaimer .notice--ivory p {
  color: #1b2027;
}

/* ===== 联络条 ===== */
.page-disclaimer .contact-strip {
  margin-top: 1.7rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  padding: 1.25rem 1.3rem;
  border: var(--line-gold);
  background: linear-gradient(135deg, rgba(20, 24, 29, 0.94), rgba(11, 13, 16, 0.94));
}

@media (min-width: 780px) {
  .page-disclaimer .contact-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.4rem;
    align-items: start;
  }
}

.page-disclaimer .contact-strip__cell {
  display: grid;
  gap: 0.4rem;
  min-width: 0;
}

.page-disclaimer .contact-strip__key {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-disclaimer .contact-strip__val {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--ivory);
  word-break: break-all;
}

.page-disclaimer .copy-btn {
  justify-self: start;
  margin-top: 0.15rem;
  font-size: 0.78rem;
}

/* ===== 文末 ===== */
.page-disclaimer .usage-end {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: 1.4rem;
  border-top: var(--line-gold);
}

.page-disclaimer .usage-end__note {
  margin: 0;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--graphite);
}

.page-disclaimer .usage-end__top {
  font: inherit;
  font-size: 0.85rem;
  padding: 0.6rem 1.15rem;
  color: var(--gold);
  background: transparent;
  border: 1px solid rgba(184, 137, 59, 0.45);
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-disclaimer .usage-end__top:hover,
.page-disclaimer .usage-end__top:focus-visible {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}

/* ===== 窄屏收敛 ===== */
@media (max-width: 560px) {
  .page-disclaimer .clause__head {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.35rem;
  }

  .page-disclaimer .terms__item {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.3rem;
  }

  .page-disclaimer .terms__idx {
    padding-top: 0;
  }

  .page-disclaimer .usage-index {
    padding-left: 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-index__link,
  .page-disclaimer .usage-link,
  .page-disclaimer .usage-end__top,
  .page-disclaimer .usage-index__num {
    transition: none;
  }
}