.page-disclaimer {
  padding-bottom: clamp(56px, 9vw, 112px);
}

/* ---------- 顶部：面包屑 + 横幅 + 首屏 ---------- */
.page-disclaimer .usage-top {
  padding-top: clamp(16px, 3vw, 32px);
}

.page-disclaimer .usage-banner {
  position: relative;
  margin: clamp(18px, 3vw, 30px) 0 clamp(28px, 4.5vw, 48px);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-disclaimer .usage-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(.45) contrast(1.08) brightness(.55);
}

.page-disclaimer .usage-banner__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(100deg, rgba(7, 12, 22, .92) 0%, rgba(7, 12, 22, .38) 44%, rgba(7, 12, 22, .9) 100%),
    radial-gradient(120% 90% at 78% 18%, rgba(43, 232, 165, .18), transparent 62%);
}

.page-disclaimer .usage-hero {
  display: grid;
  gap: 14px;
  max-width: 100%;
}

.page-disclaimer .usage-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.2vw, 3.3rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--mist);
}

.page-disclaimer .usage-hero__lede {
  margin: 0;
  max-width: var(--measure);
  font-size: 17px;
  line-height: 1.85;
  color: var(--cool);
}

@media (min-width: 900px) {
  .page-disclaimer .usage-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: end;
    gap: 12px 56px;
  }
  .page-disclaimer .usage-hero .kicker {
    grid-column: 1 / -1;
  }
  .page-disclaimer .usage-hero__lede {
    padding-bottom: 6px;
  }
}

/* ---------- 主体：左索引 + 右条目 ---------- */
.page-disclaimer .usage-body {
  display: grid;
  gap: 28px;
  margin-top: clamp(36px, 6vw, 68px);
}

.page-disclaimer .usage-index {
  border: 1px solid var(--line);
  border-left: 2px solid var(--sig-deep);
  background: var(--panel);
  padding: 18px 18px 20px;
}

.page-disclaimer .usage-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cool);
}

.page-disclaimer .usage-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-disclaimer .usage-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  color: var(--mist);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-disclaimer .usage-index__list a .mono {
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--sig-deep);
}

.page-disclaimer .usage-index__list a:hover,
.page-disclaimer .usage-index__list a:focus-visible {
  color: var(--sig);
  background: var(--track);
  border-left-color: var(--sig);
}

.page-disclaimer .usage-index__list a:focus-visible {
  outline: 1px solid var(--sig);
  outline-offset: 1px;
}

@media (min-width: 980px) {
  .page-disclaimer .usage-body {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }
  .page-disclaimer .usage-index {
    position: sticky;
    top: clamp(24px, 4vw, 48px);
  }
}

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

.page-disclaimer .usage-sec {
  scroll-margin-top: 96px;
}

.page-disclaimer .usage-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 20px;
}

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

.page-disclaimer .usage-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.4vw, 1.8rem);
  font-weight: 750;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-disclaimer .usage-sec__body {
  max-width: var(--measure);
}

.page-disclaimer .usage-sec__body + .usage-sec__body {
  margin-top: 18px;
}

.page-disclaimer .usage-sec__more {
  margin: 24px 0 0;
}

/* 刻度式分隔线 */
.page-disclaimer .usage-rule {
  border: 0;
  height: 11px;
  margin: clamp(36px, 6vw, 60px) 0;
  background-image:
    repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 22px),
    linear-gradient(var(--sig-deep), var(--sig-deep));
  background-repeat: repeat-x, no-repeat;
  background-size: 100% 6px, 68px 1px;
  background-position: 0 0, 0 10px;
}

/* ---------- 标签行 ---------- */
.page-disclaimer .tag-row {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 更新节奏表 ---------- */
.page-disclaimer .rhythm-wrap {
  margin: 4px 0 22px;
  border: 1px solid var(--line);
  background: var(--panel);
  overflow-x: auto;
}

.page-disclaimer .rhythm {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-disclaimer .rhythm th,
.page-disclaimer .rhythm td {
  text-align: left;
  vertical-align: top;
  padding: 15px 18px;
  border-bottom: 1px solid var(--line);
  line-height: 1.65;
}

.page-disclaimer .rhythm tbody tr:last-child th,
.page-disclaimer .rhythm tbody tr:last-child td {
  border-bottom: 0;
}

.page-disclaimer .rhythm thead th {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--cool);
  background: var(--track);
  border-bottom-color: var(--sig-deep);
}

.page-disclaimer .rhythm tbody th {
  font-weight: 700;
  color: var(--mist);
  white-space: nowrap;
  border-left: 2px solid var(--sig-deep);
}

.page-disclaimer .rhythm tbody td {
  color: var(--cool);
}

.page-disclaimer .rhythm .mono {
  color: var(--mist);
  font-weight: 700;
}

.page-disclaimer .rhythm__lab {
  display: none;
}

/* ---------- 规则条目 ---------- */
.page-disclaimer .rule-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-disclaimer .rule-list li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px dashed var(--line);
}

.page-disclaimer .rule-list li:last-child {
  border-bottom: 1px dashed var(--line);
}

.page-disclaimer .rule-list__no {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--sig);
  padding-top: 3px;
}

.page-disclaimer .rule-list__t {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--mist);
}

.page-disclaimer .rule-list__d {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--cool);
}

/* ---------- 终端对照 ---------- */
.page-disclaimer .devices {
  display: grid;
  gap: 18px;
  margin: 22px 0 24px;
}

.page-disclaimer .device {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 20px 20px 22px;
}

.page-disclaimer .device__name {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--sig);
}

.page-disclaimer .device__wire {
  height: 108px;
  border: 1px solid var(--line);
  background: var(--night);
  padding: 8px;
  display: grid;
  gap: 6px;
  margin-bottom: 16px;
}

.page-disclaimer .device__wire span {
  display: block;
  background: var(--track);
  border: 1px solid rgba(43, 232, 165, .22);
}

.page-disclaimer .device__wire--desktop {
  grid-template-columns: 28% minmax(0, 1fr);
}

.page-disclaimer .device__rail {
  border-color: rgba(43, 232, 165, .55) !important;
  border-left-width: 3px !important;
}

.page-disclaimer .device__main {
  background-image: repeating-linear-gradient(180deg, rgba(148, 166, 189, .28) 0 1px, transparent 1px 14px);
}

.page-disclaimer .device__wire--mobile {
  grid-template-rows: 22px minmax(0, 1fr);
}

.page-disclaimer .device__bar {
  border-color: rgba(255, 138, 61, .5) !important;
}

.page-disclaimer .device__feed {
  background-image: repeating-linear-gradient(180deg, rgba(148, 166, 189, .28) 0 1px, transparent 1px 14px);
}

.page-disclaimer .device__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--cool);
}

@media (min-width: 760px) {
  .page-disclaimer .devices {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 窄屏表格转为条目卡 ---------- */
@media (max-width: 719px) {
  .page-disclaimer .rhythm-wrap {
    overflow-x: visible;
    border: 0;
    background: transparent;
  }

  .page-disclaimer .rhythm {
    min-width: 0;
    display: block;
  }

  .page-disclaimer .rhythm thead {
    display: none;
  }

  .page-disclaimer .rhythm tbody,
  .page-disclaimer .rhythm tr,
  .page-disclaimer .rhythm th,
  .page-disclaimer .rhythm td {
    display: block;
    width: auto;
  }

  .page-disclaimer .rhythm tbody tr {
    border: 1px solid var(--line);
    border-left: 2px solid var(--sig-deep);
    background: var(--panel);
    margin-bottom: 12px;
    padding: 4px 0 8px;
  }

  .page-disclaimer .rhythm tbody th {
    border-left: 0;
    border-bottom: 1px solid var(--line);
    padding: 12px 16px 10px;
    font-size: 16px;
  }

  .page-disclaimer .rhythm tbody td {
    border-bottom: 0;
    padding: 8px 16px;
  }

  .page-disclaimer .rhythm__lab {
    display: block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .1em;
    color: var(--sig-deep);
    margin-bottom: 3px;
  }

  .page-disclaimer .rule-list li {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 10px;
  }

  .page-disclaimer .usage-rule {
    margin: 32px 0;
  }
}

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