.page-disclaimer {
  --usage-gutter: 20px;
  --usage-radius: 2px;
  background: var(--ink-900);
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* 首屏 */
.page-disclaimer .usage-hero {
  position: relative;
  padding-bottom: 36px;
  background:
    radial-gradient(120% 80% at 85% 0%, rgba(0, 229, 255, 0.1), transparent 60%),
    var(--ink-900);
  border-bottom: 1px solid var(--border-dark);
}

.page-disclaimer .usage-hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(0, 229, 255, 0.08) 0 1px, transparent 1px 68px),
    repeating-linear-gradient(0deg, rgba(199, 210, 220, 0.06) 0 1px, transparent 1px 68px);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.15) 88%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.15) 88%, transparent 100%);
}

.page-disclaimer .usage-hero__inner {
  position: relative;
  padding-block: 26px 4px;
}

.page-disclaimer .usage-hero__title {
  margin: 14px 0 0;
  font-size: clamp(32px, 8.4vw, 58px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-disclaimer .usage-hero__lead {
  max-width: 660px;
  margin: 18px 0 0;
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

.page-disclaimer .usage-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--text-dim);
}

.page-disclaimer .usage-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-disclaimer .usage-hero__facts .mono {
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
}

.page-disclaimer .usage-hero__figure {
  position: relative;
  margin-top: 26px;
}

.page-disclaimer .usage-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--border-cyan);
  border-radius: var(--usage-radius);
}

.page-disclaimer .usage-hero__figure figcaption {
  padding-top: 10px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--grey);
}

/* 章节定位条 */
.page-disclaimer .usage-steps {
  background: var(--ink-800);
  border-bottom: 1px solid var(--border-dark);
}

.page-disclaimer .usage-steps__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 14px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-disclaimer .usage-steps__list::-webkit-scrollbar {
  display: none;
}

.page-disclaimer .usage-steps__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--border-dark);
  border-radius: var(--usage-radius);
  font-size: 13px;
  line-height: 1.3;
  color: var(--text-dim);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-disclaimer .usage-steps__list a:hover,
.page-disclaimer .usage-steps__list a:focus-visible {
  color: var(--white);
  border-color: var(--border-cyan);
  background: var(--cyan-soft);
  outline: none;
}

.page-disclaimer .usage-steps__no {
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 0.06em;
}

/* 正文区 */
.page-disclaimer .usage-body {
  padding-block: 8px 64px;
}

.page-disclaimer .usage-chapter {
  display: grid;
  gap: 12px;
  padding: 36px 0;
  border-top: 1px solid var(--border-dark);
  scroll-margin-top: 88px;
}

.page-disclaimer .usage-chapter:first-child {
  border-top: 0;
  padding-top: 30px;
}

.page-disclaimer .usage-chapter__no {
  font-size: clamp(46px, 13vw, 92px);
  font-weight: 700;
  line-height: 0.78;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(0, 229, 255, 0.55);
}

.page-disclaimer .usage-chapter h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 5.4vw, 32px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-disclaimer .usage-chapter__lead {
  max-width: 720px;
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

.page-disclaimer .usage-chapter__lead--tight {
  margin-top: 20px;
  margin-bottom: 0;
}

.page-disclaimer .usage-chapter a:not(.btn) {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.35);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-disclaimer .usage-chapter a:not(.btn):hover,
.page-disclaimer .usage-chapter a:not(.btn):focus-visible {
  border-bottom-color: var(--cyan);
  color: var(--white);
  outline: none;
}

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

.page-disclaimer .usage-points li {
  position: relative;
  padding-left: 22px;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

.page-disclaimer .usage-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-disclaimer .usage-points strong {
  display: inline;
  font-family: var(--font-sans);
  font-weight: 700;
  color: var(--white);
}

/* 状态表 */
.page-disclaimer .usage-table__wrap {
  margin: 4px 0 0;
  border: 1px solid var(--border-dark);
  border-radius: var(--usage-radius);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-disclaimer .usage-table {
  width: 100%;
  min-width: 600px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-disclaimer .usage-table th {
  padding: 11px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-align: left;
  color: var(--cyan);
  background: var(--ink-850);
  border-bottom: 1px solid var(--border-cyan);
}

.page-disclaimer .usage-table td {
  padding: 13px 14px;
  line-height: 1.7;
  color: var(--text);
  border-bottom: 1px solid var(--border-dark);
  vertical-align: top;
}

.page-disclaimer .usage-table tr:last-child td {
  border-bottom: 0;
}

.page-disclaimer .usage-table td:first-child {
  font-family: var(--font-sans);
  font-weight: 700;
  color: var(--white);
  white-space: nowrap;
}

/* 格式三栏 */
.page-disclaimer .usage-formats {
  display: grid;
  gap: 12px;
  margin-top: 4px;
}

.page-disclaimer .usage-format {
  padding: 16px 18px;
  background: var(--ink-800);
  border: 1px solid var(--border-dark);
  border-left: 2px solid var(--cyan);
  border-radius: var(--usage-radius);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-disclaimer .usage-format:hover {
  border-color: var(--border-cyan);
}

.page-disclaimer .usage-format__code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-disclaimer .usage-format h3 {
  margin: 8px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-disclaimer .usage-format p:last-child {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}

/* 使用许可 */
.page-disclaimer .usage-license {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.page-disclaimer .usage-license__col {
  padding: 18px;
  background: rgba(0, 229, 255, 0.06);
  border-left: 2px solid var(--cyan);
  border-radius: var(--usage-radius);
}

.page-disclaimer .usage-license__col--stop {
  background: var(--lava-soft);
  border-left-color: var(--lava);
}

.page-disclaimer .usage-license__col h3 {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-disclaimer .usage-license__col ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-license__col li {
  position: relative;
  padding-left: 16px;
  font-family: var(--font-serif);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
}

.page-disclaimer .usage-license__col li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--cyan);
}

.page-disclaimer .usage-license__col--stop li::before {
  content: "×";
  color: var(--lava);
}

.page-disclaimer .usage-license__foot {
  margin: 14px 0 0;
  font-family: var(--font-serif);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* 四步流程 */
.page-disclaimer .usage-flow {
  display: grid;
  gap: 0;
  counter-reset: usage-step;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-flow li {
  counter-increment: usage-step;
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 14px;
  padding: 16px 0;
  border-top: 1px dashed var(--border-dark);
}

.page-disclaimer .usage-flow li:first-child {
  border-top: 1px solid var(--border-cyan);
}

.page-disclaimer .usage-flow li::before {
  content: counter(usage-step, decimal-leading-zero);
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-900);
  background: var(--cyan);
  border-radius: var(--usage-radius);
}

.page-disclaimer .usage-flow__title {
  margin: 0 0 6px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--white);
}

.page-disclaimer .usage-flow__desc {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}

/* 规则摘要卡 */
.page-disclaimer .usage-notes {
  display: grid;
  gap: 12px;
  margin: 4px 0 12px;
  padding: 4px 0 8px;
}

.page-disclaimer .usage-note {
  padding: 18px;
  background: var(--ink-800);
  border: 1px solid var(--border-dark);
  border-top: 2px solid var(--cyan);
  border-radius: var(--usage-radius);
}

.page-disclaimer .usage-note--lava {
  border-top-color: var(--lava);
}

.page-disclaimer .usage-note__code {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--grey);
}

.page-disclaimer .usage-note h3 {
  margin: 8px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-disclaimer .usage-note p:last-child {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}

/* 异常处理折叠面板 */
.page-disclaimer .usage-faq {
  display: grid;
  gap: 10px;
  margin-top: 4px;
}

.page-disclaimer .usage-item {
  background: var(--ink-800);
  border: 1px solid var(--border-dark);
  border-radius: var(--usage-radius);
  transition: border-color var(--dur) var(--ease);
}

.page-disclaimer .usage-item:hover {
  border-color: var(--border-cyan);
}

.page-disclaimer .usage-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
  cursor: pointer;
  list-style: none;
}

.page-disclaimer .usage-item summary::-webkit-details-marker {
  display: none;
}

.page-disclaimer .usage-item summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-disclaimer .usage-item[open] summary::after {
  content: "−";
}

.page-disclaimer .usage-item[open] summary {
  color: var(--cyan);
  border-bottom: 1px solid var(--border-dark);
}

.page-disclaimer .usage-item__body {
  padding: 14px 16px 18px;
  font-family: var(--font-serif);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text);
}

.page-disclaimer .usage-item__body p {
  margin: 0 0 10px;
}

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

/* 支持渠道 */
.page-disclaimer .usage-support {
  display: grid;
  gap: 10px;
  margin-top: 22px;
  padding: 18px;
  border: 1px dashed var(--border-cyan);
  border-radius: var(--usage-radius);
  background: rgba(0, 229, 255, 0.04);
}

.page-disclaimer .usage-support__line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  word-break: break-word;
}

.page-disclaimer .usage-support__line .mono {
  flex: none;
  padding: 2px 6px;
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--ink-900);
  background: var(--cyan);
  border-radius: var(--usage-radius);
}

.page-disclaimer .usage-support a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.35);
}

.page-disclaimer .usage-support a:hover,
.page-disclaimer .usage-support a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--cyan);
  outline: none;
}

/* 结尾行动区 */
.page-disclaimer .usage-cta {
  display: grid;
  gap: 22px;
  margin-top: 44px;
  padding: 26px 22px;
  background: linear-gradient(135deg, var(--ink-700) 0%, var(--ink-900) 62%);
  border: 1px solid var(--border-cyan);
  border-radius: var(--usage-radius);
}

.page-disclaimer .usage-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(21px, 5vw, 28px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--white);
}

.page-disclaimer .usage-cta p {
  max-width: 620px;
  margin: 0;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

.page-disclaimer .usage-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-disclaimer .usage-footnote {
  margin: 26px 0 0;
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.8;
  color: var(--grey);
}

.page-disclaimer .usage-footnote a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.35);
}

.page-disclaimer .usage-footnote a:hover,
.page-disclaimer .usage-footnote a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--cyan);
  outline: none;
}

/* 中屏 */
@media (min-width: 720px) {
  .page-disclaimer .usage-steps__list {
    flex-wrap: wrap;
    overflow-x: visible;
  }

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

  .page-disclaimer .usage-formats {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .page-disclaimer .usage-hero__figure {
    margin-top: 34px;
  }

  .page-disclaimer .usage-cta {
    grid-template-columns: 1fr auto;
    align-items: center;
    padding: 32px 30px;
  }

  .page-disclaimer .usage-cta__actions {
    flex: none;
    flex-direction: column;
    align-items: stretch;
  }
}

/* 宽屏 */
@media (min-width: 1000px) {
  .page-disclaimer .usage-hero__inner {
    padding-block: 34px 8px;
  }

  .page-disclaimer .usage-chapter {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 36px;
    padding: 48px 0;
  }

  .page-disclaimer .usage-chapter__no {
    position: sticky;
    top: 96px;
    font-size: 88px;
    padding-top: 4px;
  }

  .page-disclaimer .usage-chapter__lead {
    font-size: 17px;
  }

  .page-disclaimer .usage-points {
    gap: 16px;
  }

  .page-disclaimer .usage-notes {
    margin-left: 186px;
  }

  .page-disclaimer .usage-flow li {
    grid-template-columns: 40px 1fr;
    gap: 18px;
    padding: 18px 0;
  }

  .page-disclaimer .usage-cta {
    margin-top: 56px;
  }
}
<<<END>>>