.page-disclaimer {
  --disclaimer-ink: #0B1118;
  --disclaimer-body: rgba(233, 238, 246, .76);
  --disclaimer-body-strong: rgba(233, 238, 246, .86);
  background: var(--deep);
  color: #E9EEF6;
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-disclaimer a {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */

.page-disclaimer .usage-hero {
  position: relative;
  padding: 34px 0 52px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 78% at 88% 4%, rgba(0, 224, 198, .16), transparent 58%),
    radial-gradient(90% 68% at 2% 98%, rgba(255, 107, 26, .14), transparent 62%),
    var(--deep);
}

.page-disclaimer .usage-hero::before {
  content: "";
  position: absolute;
  inset: 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  pointer-events: none;
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  top: 24px;
  left: 26px;
  right: 26px;
  height: 7px;
  opacity: .72;
  pointer-events: none;
  background: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 26px);
}

.page-disclaimer .usage-hero-inner {
  position: relative;
  z-index: 1;
}

.page-disclaimer .usage-hero .breadcrumb {
  margin: 0 0 30px;
}

.page-disclaimer .usage-hero .breadcrumb a,
.page-disclaimer .usage-hero .breadcrumb li {
  color: var(--scale);
}

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

.page-disclaimer .usage-hero .index {
  color: var(--cyan);
}

.page-disclaimer h1 {
  margin: 16px 0 0;
  max-width: 15ch;
  font-size: clamp(38px, 7.2vw, 84px);
  font-weight: 200;
  line-height: 1.05;
  letter-spacing: -.022em;
  color: #fff;
}

.page-disclaimer .usage-lede {
  margin: 26px 0 0;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.92;
  color: var(--disclaimer-body);
}

.page-disclaimer .usage-hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 20px;
  margin: 42px 0 0;
  padding-top: 26px;
  max-width: 780px;
  border-top: 1px solid var(--line);
}

.page-disclaimer .usage-hero-facts dt {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--scale);
}

.page-disclaimer .usage-hero-facts dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 24px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--cyan);
}

.page-disclaimer .usage-hero-facts div:last-child dd {
  color: var(--orange);
}

@media (min-width: 760px) {
  .page-disclaimer .usage-hero {
    padding: 44px 0 66px;
  }

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

  .page-disclaimer .usage-hero-facts dd {
    font-size: 28px;
  }
}

/* ---------- 首屏配图 ---------- */

.page-disclaimer .usage-figure {
  display: block;
  width: min(calc(100% - 40px), var(--shell));
  margin: 34px auto 0;
}

.page-disclaimer .usage-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--tactic);
  object-fit: cover;
}

.page-disclaimer .usage-figure figcaption {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .1em;
  color: var(--scale);
}

/* ---------- 主体骨架 ---------- */

.page-disclaimer .usage-body {
  display: grid;
  gap: 40px;
  padding: 56px 0 84px;
}

@media (min-width: 1020px) {
  .page-disclaimer .usage-body {
    grid-template-columns: 186px minmax(0, 1fr);
    gap: 68px;
    padding: 72px 0 104px;
  }
}

/* ---------- 章节索引 ---------- */

.page-disclaimer .usage-rail {
  align-self: start;
}

.page-disclaimer .usage-rail > .index {
  color: var(--scale);
}

.page-disclaimer .usage-rail-list {
  display: flex;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0 0 6px;
  overflow-x: auto;
  list-style: none;
  scrollbar-width: thin;
}

.page-disclaimer .usage-rail-list li {
  flex: 0 0 auto;
}

.page-disclaimer .usage-rail-list a {
  display: block;
  padding: 9px 12px;
  font-size: 13px;
  letter-spacing: .04em;
  white-space: nowrap;
  color: var(--scale);
  text-decoration: none;
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}

.page-disclaimer .usage-rail-list a:hover {
  color: #fff;
  background: rgba(255, 255, 255, .05);
}

.page-disclaimer .usage-rail-list a[aria-current="true"] {
  color: var(--orange);
  background: rgba(255, 107, 26, .09);
  border-left-color: var(--orange);
}

@media (min-width: 1020px) {
  .page-disclaimer .usage-rail {
    position: sticky;
    top: 96px;
  }

  .page-disclaimer .usage-rail-list {
    display: block;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-disclaimer .usage-rail-list li + li {
    margin-top: 2px;
  }

  .page-disclaimer .usage-rail-list a {
    border-left-width: 2px;
  }
}

/* ---------- 区块通用 ---------- */

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

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

.page-disclaimer .usage-block + .usage-block {
  margin-top: 62px;
}

.page-disclaimer .section-head {
  margin-bottom: 22px;
}

.page-disclaimer .section-index {
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-disclaimer .section-title {
  margin: 10px 0 0;
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 300;
  line-height: 1.22;
  letter-spacing: -.01em;
  color: #fff;
}

.page-disclaimer .prose {
  max-width: 66ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--disclaimer-body);
}

.page-disclaimer .usage-block--card {
  padding: 32px 22px 36px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, rgba(18, 58, 107, .55), rgba(10, 31, 60, .18));
}

.page-disclaimer .usage-block--ice {
  padding: 32px 22px 36px;
  border-radius: var(--r-lg);
  background: var(--ice);
  color: var(--disclaimer-ink);
}

.page-disclaimer .usage-block--ice .section-index {
  color: var(--signal);
}

.page-disclaimer .usage-block--ice .section-title {
  color: var(--deep);
}

.page-disclaimer .usage-block--scale {
  padding-top: 34px;
  border-top: 1px solid var(--line-strong);
}

.page-disclaimer .usage-block--scale::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 8px;
  opacity: .8;
  pointer-events: none;
  background: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 30px);
}

@media (min-width: 760px) {
  .page-disclaimer .usage-block--card,
  .page-disclaimer .usage-block--ice {
    padding: 38px 34px 42px;
  }
}

/* ---------- 适用范围 ---------- */

.page-disclaimer .usage-scopes {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

@media (min-width: 860px) {
  .page-disclaimer .usage-scopes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-disclaimer .usage-scope {
  padding: 22px 20px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, .02);
  transition: border-color .24s var(--ease), transform .24s var(--ease);
}

.page-disclaimer .usage-scope:hover {
  border-color: rgba(0, 224, 198, .45);
  transform: translateY(-3px);
}

.page-disclaimer .usage-scope > .index {
  color: var(--orange);
}

.page-disclaimer .usage-scope h3 {
  margin: 12px 0 8px;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.4;
  color: #fff;
}

.page-disclaimer .usage-scope p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--disclaimer-body);
}

.page-disclaimer .usage-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-tags li {
  padding: 5px 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
  border: 1px solid rgba(0, 224, 198, .24);
  border-radius: 999px;
  background: rgba(0, 224, 198, .09);
}

/* ---------- 引用与转载 ---------- */

.page-disclaimer .usage-compare {
  display: grid;
  gap: 20px;
  margin-top: 4px;
}

@media (min-width: 820px) {
  .page-disclaimer .usage-compare {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 26px;
  }
}

.page-disclaimer .usage-compare-col {
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(8, 23, 41, .5);
}

.page-disclaimer .usage-compare-col--ok {
  border-left: 3px solid var(--cyan);
}

.page-disclaimer .usage-compare-col--ask {
  border-left: 3px solid var(--amber);
}

.page-disclaimer .usage-compare-col h3 {
  margin: 0 0 18px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .06em;
  color: #fff;
}

.page-disclaimer .usage-compare-col--ask h3 {
  color: var(--amber);
}

.page-disclaimer .usage-compare-col ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-compare-col li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--disclaimer-body-strong);
}

.page-disclaimer .usage-compare-col li + li {
  margin-top: 13px;
}

.page-disclaimer .usage-compare-col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .74em;
  width: 10px;
  height: 1px;
  background: var(--cyan);
}

.page-disclaimer .usage-compare-col--ask li::before {
  background: var(--amber);
}

.page-disclaimer .usage-ask-note {
  margin: 20px 0 0;
  padding-top: 16px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--scale);
  border-top: 1px dashed var(--line);
}

.page-disclaimer .usage-ask-note strong {
  font-weight: 600;
  color: var(--orange-soft);
}

.page-disclaimer .usage-ask-note a {
  color: var(--orange-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 客户端使用要求 ---------- */

.page-disclaimer .usage-req {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-req li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid rgba(11, 17, 24, .12);
}

.page-disclaimer .usage-req li:first-child {
  padding-top: 4px;
  border-top: 0;
}

.page-disclaimer .usage-req-num {
  min-width: 32px;
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--signal);
}

.page-disclaimer .usage-req h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--deep);
}

.page-disclaimer .usage-req p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: #3A4A5E;
}

.page-disclaimer .usage-req a {
  color: var(--signal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 更新节奏 ---------- */

.page-disclaimer .usage-timeline {
  position: relative;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-timeline li {
  position: relative;
  padding: 30px 22px 26px;
  background: rgba(8, 23, 41, .52);
  transition: background .24s var(--ease);
}

.page-disclaimer .usage-timeline li + li {
  border-top: 1px solid var(--line-soft);
}

.page-disclaimer .usage-timeline li:hover {
  background: rgba(18, 58, 107, .62);
}

.page-disclaimer .usage-timeline li::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 22px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 224, 198, .14);
}

.page-disclaimer .usage-timeline li:nth-child(2)::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 26, .16);
}

.page-disclaimer .usage-timeline li:nth-child(3)::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 194, 75, .16);
}

.page-disclaimer .usage-tl-mark {
  color: var(--cyan);
}

.page-disclaimer .usage-tl-num {
  margin: 12px 0 2px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 4.6vw, 46px);
  font-weight: 600;
  line-height: 1.05;
  color: #fff;
}

.page-disclaimer .usage-timeline h3 {
  margin: 10px 0 8px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.45;
  color: #fff;
}

.page-disclaimer .usage-timeline p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--disclaimer-body);
}

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

@media (min-width: 860px) {
  .page-disclaimer .usage-timeline {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: 1px solid var(--line-strong);
  }

  .page-disclaimer .usage-timeline li {
    padding: 30px 24px 30px;
  }

  .page-disclaimer .usage-timeline li + li {
    border-top: 0;
    border-left: 1px solid var(--line-soft);
  }

  .page-disclaimer .usage-timeline li::before {
    top: -4px;
  }
}

/* ---------- 不该这么用 ---------- */

.page-disclaimer .usage-misuse {
  display: grid;
  gap: 0;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 820px) {
  .page-disclaimer .usage-misuse {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 34px;
  }
}

.page-disclaimer .usage-misuse li {
  padding: 18px 0 20px;
  border-top: 1px solid var(--line);
}

.page-disclaimer .usage-misuse h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--amber);
}

.page-disclaimer .usage-misuse p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--disclaimer-body);
}

.page-disclaimer .usage-misuse-close {
  margin: 30px 0 0;
  padding-top: 22px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--disclaimer-body);
  border-top: 1px solid var(--line-strong);
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 30px);
  background-repeat: no-repeat;
  background-position: top left;
  background-size: 100% 1px;
}

.page-disclaimer .usage-misuse-close a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 接着看 ---------- */

.page-disclaimer .usage-next {
  margin-top: 68px;
  padding-top: 26px;
  border-top: 1px solid var(--line-strong);
}

.page-disclaimer .usage-next > .index {
  color: var(--scale);
}

.page-disclaimer .usage-next ul {
  display: grid;
  gap: 20px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 760px) {
  .page-disclaimer .usage-next ul {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-disclaimer .usage-next li:nth-child(2) {
    margin-top: 14px;
  }

  .page-disclaimer .usage-next li:nth-child(3) {
    margin-top: 28px;
  }
}

.page-disclaimer .usage-next a {
  display: inline-block;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.4;
  color: #fff;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-disclaimer .usage-next a:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.page-disclaimer .usage-next span {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--scale);
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}