.page-disclaimer {
  --num-w: 56px;
  --clause-rule: 1px solid var(--line-soft);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-disclaimer .usage-hero__frame {
  position: relative;
  display: grid;
  gap: clamp(18px, 3vw, 36px);
  padding: clamp(20px, 4vw, 44px);
  border: 1px solid var(--line);
  background:
    linear-gradient(155deg, rgba(255, 90, 31, 0.13), rgba(255, 90, 31, 0) 48%),
    var(--ink-800);
  overflow: hidden;
}

.page-disclaimer .usage-hero__frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), rgba(255, 90, 31, 0) 74%);
}

.page-disclaimer .usage-hero__frame::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -110px;
  width: 230px;
  height: 230px;
  border: 1px solid var(--line);
  transform: rotate(24deg);
  pointer-events: none;
}

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

.page-disclaimer .usage-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-style: italic;
  font-size: clamp(28px, 6.4vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  overflow-wrap: break-word;
}

.page-disclaimer .usage-hero__lead {
  margin: 16px 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--text-2);
}

.page-disclaimer .usage-hero__meta {
  display: grid;
  gap: 6px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--text-3);
}

.page-disclaimer .usage-hero__k {
  display: inline-block;
  min-width: 72px;
  color: var(--cyan);
}

.page-disclaimer .usage-hero__dial {
  position: relative;
  z-index: 1;
  align-self: center;
  justify-self: start;
  width: clamp(120px, 30vw, 178px);
  opacity: 0.95;
}

.page-disclaimer .usage-hero__dial svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-disclaimer .dial__ring {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
}

.page-disclaimer .dial__ring--dash {
  stroke-dasharray: 2 7;
}

.page-disclaimer .dial__slice {
  fill: none;
  stroke: var(--violet);
  stroke-width: 1;
  opacity: 0.6;
}

.page-disclaimer .dial__hand {
  stroke-width: 2;
  stroke-linecap: round;
}

.page-disclaimer .dial__hand--cyan {
  stroke: var(--cyan);
}

.page-disclaimer .dial__hand--orange {
  stroke: var(--orange);
  stroke-width: 3;
}

.page-disclaimer .dial__pin {
  fill: var(--lime);
  stroke: none;
}

.page-disclaimer .usage-hero__media {
  margin-top: clamp(18px, 3vw, 28px);
  min-height: 170px;
  aspect-ratio: 16 / 6;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-700);
}

.page-disclaimer .usage-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-disclaimer .usage-hero__media .media-frame__caption {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--text-3);
}

/* ---------- 正文双栏 ---------- */
.page-disclaimer .usage-body {
  padding-top: clamp(36px, 5vw, 64px);
}

.page-disclaimer .usage-body__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

/* 索引：移动端为横向滚动条 */
.page-disclaimer .usage-index {
  padding-bottom: 14px;
  border-bottom: var(--clause-rule);
}

.page-disclaimer .usage-index__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--text-3);
  text-transform: uppercase;
}

.page-disclaimer .usage-index .toc {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.page-disclaimer .usage-index .toc__link {
  flex: 0 0 auto;
  display: block;
  padding: 8px 12px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-2);
  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-index .toc__link:hover,
.page-disclaimer .usage-index .toc__link:focus-visible {
  color: var(--text);
  border-color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
}

.page-disclaimer .usage-index .toc__link[aria-current="true"] {
  color: var(--lime);
  border-color: var(--lime);
  background: rgba(215, 255, 63, 0.07);
}

.page-disclaimer .usage-index__top {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

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

/* ---------- 条款长卷 ---------- */
.page-disclaimer .usage-clauses {
  max-width: 68ch;
}

.page-disclaimer .clause {
  display: grid;
  gap: 10px;
  padding-block: clamp(24px, 4vw, 40px);
  border-top: var(--clause-rule);
  scroll-margin-top: 88px;
}

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

.page-disclaimer .clause__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 6vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--text-3);
  transition: color var(--dur) var(--ease);
}

.page-disclaimer .clause:hover .clause__num,
.page-disclaimer .clause:focus-within .clause__num {
  color: var(--orange);
}

.page-disclaimer .clause__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.3vw, 25px);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-disclaimer .clause__text {
  margin: 0 0 12px;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.85;
  color: var(--text-2);
}

.page-disclaimer .clause__text a,
.page-disclaimer .clause__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.45);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-disclaimer .clause__text a:hover,
.page-disclaimer .clause__note a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-disclaimer .clause__list,
.page-disclaimer .clause__steps {
  display: grid;
  gap: 10px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.page-disclaimer .clause__list li {
  position: relative;
  padding-left: 18px;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.8;
  color: var(--text-2);
}

.page-disclaimer .clause__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--orange);
}

.page-disclaimer .clause__steps li {
  position: relative;
  padding-left: 30px;
  counter-increment: step;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.8;
  color: var(--text-2);
}

.page-disclaimer .clause__steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  color: var(--cyan);
}

.page-disclaimer .clause__list strong,
.page-disclaimer .clause__steps strong {
  color: var(--text);
  font-weight: 600;
}

.page-disclaimer .clause__note {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--text-3);
}

/* 折叠细则 */
.page-disclaimer .clause__more {
  margin: 4px 0 0;
  border: 1px solid var(--line);
  background: var(--ink-700);
}

.page-disclaimer .clause__more summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--cyan);
  list-style: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

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

.page-disclaimer .clause__more summary::after {
  content: "+";
  font-size: 15px;
  color: var(--text-3);
}

.page-disclaimer .clause__more[open] summary::after {
  content: "−";
  color: var(--orange);
}

.page-disclaimer .clause__more summary:hover,
.page-disclaimer .clause__more summary:focus-visible {
  color: var(--lime);
  background: rgba(34, 211, 238, 0.06);
}

.page-disclaimer .clause__more-inner {
  padding: 4px 14px 16px;
  border-top: 1px solid var(--line-soft);
}

/* 联系信息定义列表 */
.page-disclaimer .usage-contact {
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border: 1px solid var(--line);
  background: var(--ink-700);
}

.page-disclaimer .usage-contact__row {
  display: grid;
  gap: 2px;
  padding: 12px 14px;
  border-top: 1px solid var(--line-soft);
}

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

.page-disclaimer .usage-contact__k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--text-3);
}

.page-disclaimer .usage-contact__v {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
  overflow-wrap: break-word;
}

/* ---------- 收尾 ---------- */
.page-disclaimer .usage-outro__inner {
  display: grid;
  gap: 18px;
}

.page-disclaimer .usage-outro__lead {
  margin: 8px 0 0;
  max-width: 52ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--text-2);
}

.page-disclaimer .usage-links {
  display: grid;
  gap: 8px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-disclaimer .usage-links a {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
  justify-self: start;
}

.page-disclaimer .usage-links a:hover,
.page-disclaimer .usage-links a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-disclaimer .usage-outro__top {
  justify-self: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-disclaimer .usage-hero__frame {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-disclaimer .usage-hero__meta {
    grid-template-columns: repeat(3, minmax(0, auto));
    gap: 10px 28px;
  }

  .page-disclaimer .usage-hero__k {
    display: block;
    min-width: 0;
    margin-bottom: 2px;
  }

  .page-disclaimer .clause {
    grid-template-columns: var(--num-w) minmax(0, 1fr);
    gap: 18px;
  }

  .page-disclaimer .clause__num {
    font-size: 40px;
    padding-top: 2px;
  }

  .page-disclaimer .usage-contact__row {
    grid-template-columns: 130px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

  .page-disclaimer .usage-outro__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-disclaimer .usage-outro__top {
    grid-column: 2;
  }
}

@media (min-width: 960px) {
  .page-disclaimer .usage-body__grid {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
    align-items: start;
  }

  .page-disclaimer .usage-index {
    position: sticky;
    top: 96px;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-disclaimer .usage-index .toc {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .page-disclaimer .usage-index .toc__link {
    border: 0;
    border-left: 1px solid var(--line);
    padding: 9px 0 9px 14px;
    white-space: normal;
    background: transparent;
    transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
  }

  .page-disclaimer .usage-index .toc__link:hover,
  .page-disclaimer .usage-index .toc__link:focus-visible {
    border-left-color: var(--cyan);
    padding-left: 18px;
  }

  .page-disclaimer .usage-index .toc__link[aria-current="true"] {
    border-left-color: var(--lime);
    padding-left: 18px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-index .toc__link,
  .page-disclaimer .clause__num,
  .page-disclaimer .usage-links a,
  .page-disclaimer .clause__more summary {
    transition: none;
  }
}