.page-disclaimer {
  --ud-line: linear-gradient(90deg, var(--violet) 0%, var(--blue) 52%, transparent 100%);
  --ud-gap: clamp(20px, 3vw, 34px);
  font-family: var(--font-body);
  color: var(--paper);
}

/* 面包屑 */
.page-disclaimer .breadcrumb {
  margin-bottom: clamp(22px, 3.5vw, 36px);
}

.page-disclaimer .breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-disclaimer .breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--steel);
}

.page-disclaimer .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-disclaimer .breadcrumb a:hover,
.page-disclaimer .breadcrumb a:focus-visible {
  color: var(--blue);
}

.page-disclaimer .breadcrumb a:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 3px;
}

.page-disclaimer .breadcrumb [aria-current="page"] {
  color: var(--paper);
}

/* 首屏 */
.page-disclaimer .usage-hero {
  position: relative;
  padding: clamp(104px, 13vw, 156px) 0 clamp(36px, 5vw, 58px);
  border-bottom: 1px solid var(--steel);
  background:
    radial-gradient(120% 92% at 10% -12%, rgba(89, 200, 245, 0.16), transparent 62%),
    radial-gradient(90% 84% at 94% 2%, rgba(142, 91, 255, 0.19), transparent 66%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
}

.page-disclaimer .usage-hero__grid {
  display: grid;
  gap: var(--ud-gap);
  align-items: end;
}

.page-disclaimer .usage-hero__lead {
  min-width: 0;
}

.page-disclaimer .usage-hero__eyebrow {
  margin: 0 0 clamp(14px, 2vw, 22px);
  line-height: 1;
}

.page-disclaimer .usage-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.9rem, 9vw, 5.4rem);
  font-weight: 800;
  line-height: 0.94;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-disclaimer .usage-hero__desc {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 48ch;
  font-size: clamp(1rem, 1.4vw, 1.0625rem);
  line-height: 1.78;
  color: var(--mist);
}

.page-disclaimer .usage-hero__figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius-l);
  border: 1px solid var(--steel);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--glass);
}

.page-disclaimer .usage-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(53, 240, 160, 0.1) 0%, transparent 42%, rgba(7, 12, 18, 0.55) 100%);
  pointer-events: none;
}

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

/* 顶部三条摘要 */
.page-disclaimer .usage-quick {
  list-style: none;
  margin: clamp(30px, 5vw, 48px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-disclaimer .usage-quick__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  min-height: 64px;
  padding: 16px 18px;
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  background: var(--glass-fill);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  color: var(--paper);
  text-decoration: none;
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-disclaimer .usage-quick__link:hover,
.page-disclaimer .usage-quick__link:focus-visible {
  border-color: var(--blue);
  background: rgba(89, 200, 245, 0.1);
}

.page-disclaimer .usage-quick__link:hover {
  transform: translateY(-2px);
}

.page-disclaimer .usage-quick__link:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.page-disclaimer .usage-quick__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--neon);
}

.page-disclaimer .usage-quick__q {
  min-width: 0;
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--paper);
}

.page-disclaimer .usage-quick__go {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--blue);
  transition: transform 0.22s var(--ease);
}

.page-disclaimer .usage-quick__link:hover .usage-quick__go,
.page-disclaimer .usage-quick__link:focus-visible .usage-quick__go {
  transform: translateX(3px);
}

/* 说明卡片流 */
.page-disclaimer .usage-flow {
  padding-top: clamp(26px, 4vw, 44px);
  padding-bottom: clamp(52px, 7vw, 92px);
}

.page-disclaimer .usage-card {
  position: relative;
  display: grid;
  gap: clamp(10px, 1.6vw, 20px);
  padding: clamp(28px, 4vw, 44px) 0 clamp(30px, 5vw, 52px);
}

.page-disclaimer .usage-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(340px, 62%);
  height: 1px;
  background: var(--ud-line);
  opacity: 0.55;
  transition: opacity 0.24s var(--ease);
}

.page-disclaimer .usage-card:hover::before,
.page-disclaimer .usage-card:focus-within::before {
  opacity: 1;
}

.page-disclaimer .usage-card__index {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--blue);
  padding-top: 4px;
}

.page-disclaimer .usage-card__body {
  min-width: 0;
}

.page-disclaimer .usage-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.6vw, 2.35rem);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-disclaimer .usage-card__lead {
  margin: clamp(12px, 1.8vw, 18px) 0 0;
  max-width: 64ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-disclaimer .usage-points {
  list-style: none;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
}

.page-disclaimer .usage-points__item {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--steel-soft);
}

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

.page-disclaimer .usage-points__mark {
  display: flex;
  align-items: center;
  gap: 7px;
  padding-top: 0.34em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--blue);
}

.page-disclaimer .usage-points__mark::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--blue);
}

.page-disclaimer .usage-points__text {
  min-width: 0;
  font-size: 0.9375rem;
  line-height: 1.74;
  color: rgba(234, 246, 252, 0.86);
}

.page-disclaimer .usage-card__more {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-disclaimer .usage-card__more a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(89, 200, 245, 0.4);
  padding-bottom: 1px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-disclaimer .usage-card__more a:hover,
.page-disclaimer .usage-card__more a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

.page-disclaimer .usage-card__more a:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 3px;
}

/* 署名示例 */
.page-disclaimer .usage-cite {
  position: relative;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: clamp(18px, 2.6vw, 24px) clamp(20px, 2.8vw, 28px);
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  background:
    linear-gradient(120deg, rgba(142, 91, 255, 0.17) 0%, rgba(89, 200, 245, 0.12) 55%, transparent 100%),
    var(--ink-2);
}

.page-disclaimer .usage-cite::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--violet), var(--blue));
}

.page-disclaimer .usage-cite__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--violet);
}

.page-disclaimer .usage-cite__text {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--paper);
  overflow-wrap: anywhere;
}

/* 响应式 */
@media (min-width: 720px) {
  .page-disclaimer .usage-quick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-disclaimer .usage-card {
    grid-template-columns: 78px minmax(0, 1fr);
    column-gap: clamp(18px, 3vw, 36px);
  }

  .page-disclaimer .usage-card__index {
    position: sticky;
    top: 108px;
  }
}

@media (min-width: 920px) {
  .page-disclaimer .usage-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(34px, 5vw, 66px);
  }
}

@media (max-width: 520px) {
  .page-disclaimer .usage-points__item {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 10px;
  }

  .page-disclaimer .usage-points__mark {
    font-size: 0.6875rem;
  }

  .page-disclaimer .usage-hero__figure {
    border-radius: var(--radius);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-quick__link,
  .page-disclaimer .usage-quick__go,
  .page-disclaimer .usage-card::before {
    transition: none;
  }

  .page-disclaimer .usage-quick__link:hover {
    transform: none;
  }

  .page-disclaimer .usage-quick__link:hover .usage-quick__go,
  .page-disclaimer .usage-quick__link:focus-visible .usage-quick__go {
    transform: none;
  }
}