.page-disclaimer {
  --pd-line: #1E3F58;
  --pd-num: #E9C88A;
  background: var(--deep);
  color: var(--white);
}

.page-disclaimer a {
  color: var(--sky);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-deep);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

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

.page-disclaimer a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-bottom-color: transparent;
}

/* 首屏 */
.page-disclaimer .usage-hero {
  padding-block: clamp(24px, 5vw, 60px) clamp(20px, 3vw, 36px);
  max-width: var(--maxw);
}

.page-disclaimer .usage-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 8.4vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -.02em;
  margin: clamp(12px, 2vw, 20px) 0 0;
  text-wrap: balance;
  color: var(--white);
}

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

.page-disclaimer .usage-hero__lede {
  max-width: 60ch;
  margin: clamp(14px, 2vw, 22px) 0 0;
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.78;
  font-weight: 300;
  color: var(--sky);
}

.page-disclaimer .usage-hero__media {
  margin-top: clamp(24px, 4vw, 44px);
}

.page-disclaimer .usage-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.92);
}

/* 章节索引 */
.page-disclaimer .usage-toc {
  display: grid;
  gap: 12px;
  padding-block: 16px;
  border-top: 1px solid var(--pd-line);
  border-bottom: 1px solid var(--pd-line);
}

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

.page-disclaimer .usage-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-disclaimer .usage-toc__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--pd-line);
  color: var(--white);
  white-space: nowrap;
  font-size: 14px;
  line-height: 1.4;
  transition: border-color .25s var(--ease), color .25s var(--ease), background .25s var(--ease);
}

.page-disclaimer .usage-toc__list a:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(34, 240, 214, .06);
}

.page-disclaimer .usage-toc__list .mono {
  color: var(--pd-num);
}

.page-disclaimer .usage-toc__list a:hover .mono {
  color: var(--cyan);
}

/* 章节 */
.page-disclaimer .usage-body {
  display: grid;
  gap: clamp(30px, 5vw, 58px);
  padding-block: clamp(32px, 5vw, 64px);
}

.page-disclaimer .usage-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
}

.page-disclaimer .usage-sec__num {
  padding-top: .35em;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--pd-num);
}

.page-disclaimer .usage-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.2rem, 3.6vw, 1.75rem);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-disclaimer .usage-sec__glyph {
  position: relative;
  width: 24px;
  height: 24px;
  margin-top: .2em;
  border: 1px solid var(--pd-line);
  flex: 0 0 auto;
}

.page-disclaimer .usage-sec__glyph::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top right,
    transparent calc(50% - .5px),
    var(--cyan-deep) calc(50% - .5px),
    var(--cyan-deep) calc(50% + .5px),
    transparent calc(50% + .5px));
}

.page-disclaimer .usage-sec__glyph::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 5px;
  height: 5px;
  background: var(--cyan);
}

.page-disclaimer .usage-sec:nth-of-type(even) .usage-sec__glyph::before {
  background: linear-gradient(to bottom right,
    transparent calc(50% - .5px),
    var(--cyan-deep) calc(50% - .5px),
    var(--cyan-deep) calc(50% + .5px),
    transparent calc(50% + .5px));
}

.page-disclaimer .usage-sec:nth-of-type(even) .usage-sec__glyph::after {
  right: auto;
  left: -1px;
  background: var(--pd-num);
}

.page-disclaimer .usage-sec__text {
  max-width: 64ch;
  margin-top: 16px;
}

.page-disclaimer .usage-sec__text p {
  margin: 0 0 1.05em;
  font-size: 1rem;
  line-height: 1.8;
  font-weight: 400;
  color: var(--white);
}

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

.page-disclaimer .usage-mark {
  border-bottom: 1px dashed var(--cyan);
  padding-bottom: 1px;
}

/* 页尾 */
.page-disclaimer .usage-outro {
  display: grid;
  gap: clamp(20px, 4vw, 34px);
  margin-top: clamp(20px, 4vw, 40px);
  padding-block: clamp(28px, 5vw, 52px) clamp(40px, 6vw, 84px);
  border-top: 1px solid var(--pd-line);
}

.page-disclaimer .usage-outro__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 3vw, 1.5rem);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-disclaimer .usage-scale {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--pd-line);
  border: 1px solid var(--pd-line);
}

.page-disclaimer .usage-scale li {
  background: var(--deep);
}

.page-disclaimer .usage-scale a {
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
  padding: 16px;
  border-bottom: none;
  color: var(--white);
  font-size: 15px;
  transition: background .25s var(--ease), color .25s var(--ease);
}

.page-disclaimer .usage-scale a::before {
  content: "";
  display: block;
  width: 28px;
  height: 1px;
  background: var(--cyan-deep);
  transition: width .35s var(--ease), background .35s var(--ease);
}

.page-disclaimer .usage-scale a .mono {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
  transition: color .25s var(--ease);
}

.page-disclaimer .usage-scale a:hover {
  background: var(--deep-2);
  color: var(--cyan);
}

.page-disclaimer .usage-scale a:hover::before {
  width: 100%;
  background: var(--cyan);
}

.page-disclaimer .usage-scale a:hover .mono {
  color: var(--cyan);
}

.page-disclaimer .usage-contact {
  display: grid;
  gap: 8px;
  padding-left: 16px;
  border-left: 2px solid var(--coral);
}

.page-disclaimer .usage-contact__line {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--white);
}

.page-disclaimer .usage-contact__line .mono {
  color: var(--white);
  letter-spacing: .01em;
}

.page-disclaimer .usage-contact__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 768px) {
  .page-disclaimer .usage-toc {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 20px;
  }

  .page-disclaimer .usage-sec__head {
    gap: 20px;
  }

  .page-disclaimer .usage-sec__text {
    padding-left: clamp(0px, 2vw, 32px);
  }

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

@media (min-width: 1024px) {
  .page-disclaimer .usage-hero {
    padding-top: clamp(40px, 6vw, 76px);
  }

  .page-disclaimer .usage-body {
    position: relative;
    padding-right: 56px;
    border-right: 1px solid var(--pd-line);
  }

  .page-disclaimer .usage-body::after {
    content: "";
    position: absolute;
    top: 0;
    right: -1px;
    width: 1px;
    height: 140px;
    background: linear-gradient(var(--cyan), transparent);
  }

  .page-disclaimer .usage-sec__text {
    max-width: 62ch;
    padding-left: clamp(24px, 3vw, 56px);
  }

  .page-disclaimer .usage-toc__list {
    overflow-x: visible;
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-scale a::before,
  .page-disclaimer .usage-toc__list a,
  .page-disclaimer .usage-scale a {
    transition: none;
  }
}
<<<END>>>