.page-disclaimer {
  --usage-lead-w: 64ch;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  padding-block: clamp(24px, 5vw, 44px) 0;
}

.page-disclaimer .crumbs {
  margin-bottom: 26px;
}

.page-disclaimer .usage-hero__lead-wrap {
  max-width: 74ch;
}

.page-disclaimer .usage-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(40px, 9vw, 82px);
  font-weight: 800;
  line-height: 0.96;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-disclaimer .usage-hero__lead {
  margin: 18px 0 0;
  max-width: var(--usage-lead-w);
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-disclaimer .usage-banner {
  position: relative;
  margin: clamp(28px, 5vw, 46px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background:
    radial-gradient(120% 140% at 12% 10%, var(--cyan-soft) 0%, transparent 58%),
    linear-gradient(155deg, var(--ink-2) 0%, var(--ink-0) 100%);
  box-shadow: var(--shadow);
}

.page-disclaimer .usage-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 5;
  object-fit: cover;
  opacity: 0.84;
}

.page-disclaimer .usage-banner .figure__caption {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 正文骨架 ---------- */
.page-disclaimer .usage-body {
  padding-block: clamp(36px, 6vw, 72px);
}

.page-disclaimer .usage-layout {
  display: grid;
  gap: 40px;
  min-width: 0;
}

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

.page-disclaimer .usage-side {
  min-width: 0;
  display: grid;
  gap: 18px;
  align-content: start;
}

/* ---------- 章节 ---------- */
.page-disclaimer .usage-sec {
  padding-block: clamp(26px, 4vw, 40px);
  border-top: 1px solid var(--dark-line);
}

.page-disclaimer .usage-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-disclaimer .usage-sec__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-disclaimer .usage-sec h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(23px, 4.4vw, 33px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-disclaimer .usage-abstract {
  margin: 16px 0 22px;
  padding-left: 14px;
  border-left: 3px solid var(--orange);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.7;
  color: var(--paper);
}

.page-disclaimer .usage-sec p {
  margin: 0 0 15px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--mist);
}

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

.page-disclaimer .usage-sec strong {
  color: var(--paper);
  font-weight: 700;
}

.page-disclaimer .usage-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 216, 190, 0.42);
  padding-bottom: 1px;
}

.page-disclaimer .usage-inline-link:hover,
.page-disclaimer .usage-inline-link:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 清单 ---------- */
.page-disclaimer .usage-list {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-disclaimer .usage-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--mist);
}

.page-disclaimer .usage-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.7em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--cyan);
}

/* ---------- 署名代码块 ---------- */
.page-disclaimer .cite {
  margin: 0 0 22px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background:
    linear-gradient(180deg, rgba(31, 216, 190, 0.06) 0%, transparent 100%),
    var(--ink-0);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.95;
  letter-spacing: 0.01em;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-disclaimer .cite code {
  font: inherit;
  color: inherit;
  background: none;
  white-space: inherit;
}

.page-disclaimer .cite--compact {
  margin: 12px 0 0;
  padding: 14px 16px;
  font-size: 12.5px;
  line-height: 1.85;
}

/* ---------- 表格 ---------- */
.page-disclaimer .usage-tablewrap {
  margin: 0 0 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ink-2);
}

.page-disclaimer .usage-table {
  min-width: 560px;
  font-size: 14.5px;
}

.page-disclaimer .usage-table caption {
  text-align: left;
}

.page-disclaimer .usage-table th {
  background: var(--ink-3);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.page-disclaimer .usage-table td {
  color: var(--mist);
  line-height: 1.65;
  vertical-align: top;
}

.page-disclaimer .usage-table td:first-child {
  color: var(--paper);
  font-weight: 600;
  white-space: nowrap;
}

.page-disclaimer .usage-table tbody tr:nth-child(even) {
  background: rgba(31, 216, 190, 0.04);
}

/* ---------- 侧栏 ---------- */
.page-disclaimer .usage-toc__list {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-disclaimer .usage-toc__list .toc__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 6px 8px;
  border-radius: var(--r-sm);
  text-decoration: none;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.5;
  transition: background-color 180ms ease, color 180ms ease;
}

.page-disclaimer .usage-toc__list .toc__link:hover,
.page-disclaimer .usage-toc__list .toc__link:focus-visible {
  background: var(--cyan-soft);
  color: var(--paper);
}

.page-disclaimer .usage-toc__list .toc__link[aria-current="true"] {
  background: var(--orange-soft);
  color: var(--paper);
  box-shadow: inset 3px 0 0 var(--orange);
}

.page-disclaimer .usage-toc__list .toc__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-disclaimer .usage-card__note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-disclaimer .usage-steps {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}

.page-disclaimer .usage-steps li {
  display: grid;
  gap: 4px;
  padding: 11px 0;
  border-top: 1px solid var(--hair);
}

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

.page-disclaimer .usage-steps__k {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-disclaimer .usage-steps__v {
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 1000px) {
  .page-disclaimer .usage-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 64px;
    align-items: start;
  }

  .page-disclaimer .usage-side {
    position: sticky;
    top: 96px;
  }

  .page-disclaimer .usage-sec {
    padding-right: 8px;
  }
}

@media (min-width: 1280px) {
  .page-disclaimer .usage-layout {
    gap: 88px;
  }

  .page-disclaimer .usage-sec p {
    max-width: 68ch;
  }
}

/* ---------- 降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-toc__list .toc__link {
    transition: none;
  }
}
<<<END>>>