.page-disclaimer {
  --usage-accent-line: linear-gradient(90deg, var(--lime) 0%, rgba(200, 249, 78, 0.15) 62%, rgba(200, 249, 78, 0) 100%);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-disclaimer .breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-disclaimer .usage-head {
  padding-top: clamp(10px, 2.4vw, 22px);
}

.page-disclaimer .usage-head__title {
  margin: 14px 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.08;
  font-size: clamp(29px, 5.2vw, 56px);
  color: var(--bone);
  max-width: 20ch;
}

.page-disclaimer .usage-head__lead {
  margin: 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.72;
  color: var(--silver);
}

/* 顶部横幅 */
.page-disclaimer .usage-banner {
  position: relative;
  margin: clamp(22px, 4vw, 36px) 0 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

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

.page-disclaimer .usage-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(11, 31, 26, 0.92) 0%, rgba(11, 31, 26, 0.35) 46%, rgba(11, 31, 26, 0) 78%);
  pointer-events: none;
}

/* 章节锚点 */
.page-disclaimer .usage-nav {
  margin-top: clamp(20px, 3.4vw, 34px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(16, 48, 42, 0.72), rgba(16, 48, 42, 0));
}

.page-disclaimer .usage-nav__list {
  display: flex;
  gap: clamp(14px, 2.6vw, 34px);
  margin: 0;
  padding: 12px 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-disclaimer .usage-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 1px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

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

.page-disclaimer .usage-nav__num {
  font-size: 12px;
  color: var(--moss);
}

.page-disclaimer .usage-nav__link:hover .usage-nav__num,
.page-disclaimer .usage-nav__link:focus-visible .usage-nav__num {
  color: var(--lime);
}

/* 章节 */
.page-disclaimer .usage-sec {
  display: grid;
  gap: 14px;
  padding: clamp(28px, 4.4vw, 50px) 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--bar-h) + 16px);
}

.page-disclaimer .usage-sec__num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--moss);
}

.page-disclaimer .usage-sec__title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.16;
  font-size: clamp(22px, 3.1vw, 34px);
  color: var(--bone);
}

.page-disclaimer .usage-sec__body {
  max-width: 560px;
}

.page-disclaimer .usage-sec__body p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.72;
  color: var(--silver);
}

.page-disclaimer .usage-sec__body p:last-child {
  margin-bottom: 0;
}

.page-disclaimer .usage-sec__body a {
  color: var(--bone);
  text-decoration: none;
  border-bottom: 1px solid var(--moss);
}

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

/* 设备两栏 */
.page-disclaimer .device {
  display: grid;
  gap: 12px;
  margin-bottom: 16px;
}

.page-disclaimer .device__item {
  padding: 16px 18px;
  background: var(--ink-2);
  border: 1px solid var(--line);
}

.page-disclaimer .device__name {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-disclaimer .device__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
}

.page-disclaimer .usage-tip {
  padding-left: 14px;
  border-left: 2px solid var(--moss);
}

/* 分隔强调线 */
.page-disclaimer .usage-rule {
  height: 3px;
  margin: 0;
  border: 0;
  background: var(--usage-accent-line);
}

/* 时间节奏列表 */
.page-disclaimer .usage-times {
  display: grid;
  gap: 14px;
  margin: 18px 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-times__item {
  display: grid;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

.page-disclaimer .usage-times__value {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-disclaimer .usage-times__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--silver);
}

/* 引用格式 */
.page-disclaimer .cite {
  margin: 0 0 16px;
  padding: 14px 16px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--lime);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.95;
  color: var(--bone);
  white-space: pre-wrap;
  word-break: break-word;
}

.page-disclaimer .cite code {
  font: inherit;
  color: inherit;
}

/* 联系方式 */
.page-disclaimer .usage-contact {
  display: grid;
  gap: 10px;
  margin: 18px 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-contact li {
  display: grid;
  gap: 2px;
  padding: 12px 14px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  font-size: 15px;
  color: var(--bone);
  word-break: break-word;
}

.page-disclaimer .usage-contact__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--moss);
}

.page-disclaimer .usage-contact a {
  color: var(--bone);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  width: fit-content;
}

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

.page-disclaimer .usage-contact__note {
  font-size: 13px;
  color: var(--stone);
}

/* 延伸入口 */
.page-disclaimer .usage-help {
  margin-top: clamp(32px, 5vw, 56px);
  padding-top: clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--line);
}

.page-disclaimer .usage-help__title {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--bone);
}

.page-disclaimer .usage-help__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-help__list a {
  display: block;
  padding: 12px 14px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--silver);
  text-decoration: none;
  background: rgba(16, 48, 42, 0.55);
  border: 1px solid var(--line);
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}

.page-disclaimer .usage-help__list a:hover,
.page-disclaimer .usage-help__list a:focus-visible {
  color: var(--bone);
  border-color: var(--lime);
  background: rgba(28, 68, 56, 0.7);
}

@media (min-width: 640px) {
  .page-disclaimer .usage-times__item {
    grid-template-columns: minmax(0, 150px) minmax(0, 1fr);
    align-items: baseline;
    gap: 4px 18px;
  }

  .page-disclaimer .device {
    grid-template-columns: 1fr 1fr;
  }

  .page-disclaimer .usage-help__list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 880px) {
  .page-disclaimer .usage-sec {
    grid-template-columns: minmax(200px, 0.7fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 68px);
    align-items: start;
    padding: clamp(34px, 4vw, 56px) 0;
  }

  .page-disclaimer .usage-sec__head {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }

  .page-disclaimer .usage-sec__body {
    max-width: 560px;
    justify-self: end;
    width: 100%;
  }

  .page-disclaimer .usage-nav {
    position: relative;
  }
}

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

  .page-disclaimer .usage-sec__head {
    position: static;
  }
}