.page-disclaimer {
  --u-line: rgba(124, 153, 172, .26);
  --u-line-soft: rgba(124, 153, 172, .14);
  --u-glow: rgba(0, 224, 198, .38);
  --u-body: rgba(233, 246, 243, .82);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-masthead {
  padding-top: clamp(18px, 3.5vw, 40px);
  padding-bottom: clamp(30px, 5vw, 58px);
}

.page-disclaimer .usage-masthead__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-disclaimer .usage-masthead__copy {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.page-disclaimer .usage-masthead__copy h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 9vw, 72px);
  line-height: 1.02;
  letter-spacing: -.5px;
  color: var(--cold);
  margin: 0;
}

.page-disclaimer .usage-masthead__copy .lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--u-body);
}

.page-disclaimer .usage-masthead__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.page-disclaimer .usage-masthead__media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--u-line);
  background: var(--ink-800);
  aspect-ratio: 16 / 7;
}

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

.page-disclaimer .usage-masthead__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(0, 224, 198, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 224, 198, .07) 1px, transparent 1px);
  background-size: 44px 44px;
}

/* ---------- 通用章节 ---------- */
.page-disclaimer .usage-block {
  padding-block: clamp(28px, 4.6vw, 52px);
  border-top: 1px solid var(--u-line-soft);
}

.page-disclaimer .usage-block__head {
  margin-bottom: clamp(16px, 2.6vw, 26px);
  max-width: 46em;
}

.page-disclaimer .usage-block__head h2 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 31px);
  line-height: 1.18;
  letter-spacing: -.3px;
  color: var(--cold);
}

.page-disclaimer .usage-block__head h2::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  background: var(--signal);
}

.page-disclaimer .usage-block__intro {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 条文列表 ---------- */
.page-disclaimer .clause-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-disclaimer .clause {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 0 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--u-line-soft);
}

.page-disclaimer .clause::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, var(--u-glow), rgba(0, 224, 198, 0) 72%);
  pointer-events: none;
}

.page-disclaimer .clause:first-child {
  border-top: 1px solid var(--u-line-soft);
}

.page-disclaimer .clause__num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.72;
  letter-spacing: .04em;
  color: var(--cyan);
  border-left: 2px solid var(--u-glow);
  padding-left: 9px;
}

.page-disclaimer .clause__body {
  min-width: 0;
}

.page-disclaimer .clause__body p {
  margin: 0;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--u-body);
  overflow-wrap: anywhere;
}

.page-disclaimer .clause__body p strong {
  font-weight: 700;
  color: var(--cold);
}

.page-disclaimer .clause__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 224, 198, .45);
}

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

/* ---------- 折叠举例 ---------- */
.page-disclaimer .clause__more {
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid rgba(0, 224, 198, .3);
}

.page-disclaimer .clause__more summary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 2px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--cyan);
}

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

.page-disclaimer .clause__more summary::before {
  content: "+";
  font-size: 14px;
  line-height: 1;
  color: var(--signal);
}

.page-disclaimer .clause__more[open] summary::before {
  content: "–";
}

.page-disclaimer .clause__more p {
  margin: 8px 0 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate);
}

/* ---------- 底部流程 ---------- */
.page-disclaimer .usage-next {
  padding-block: clamp(28px, 4.6vw, 52px) clamp(40px, 6vw, 74px);
  border-top: 1px solid var(--u-line-soft);
}

.page-disclaimer .usage-next__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.6vw, 23px);
  line-height: 1.3;
  color: var(--cold);
}

.page-disclaimer .usage-next__flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-disclaimer .usage-next__step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 auto;
  min-width: 0;
  padding: 13px 22px;
  border: 1px solid var(--u-line);
  border-left: 3px solid var(--u-glow);
  background: var(--surface);
  color: var(--cold);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: border-color .2s var(--ease), background-color .2s var(--ease), color .2s var(--ease);
}

.page-disclaimer .usage-next__step:hover,
.page-disclaimer .usage-next__step:focus-visible {
  border-color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(0, 224, 198, .1);
  color: var(--cyan);
}

.page-disclaimer .usage-next__arrow {
  flex: none;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--signal);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-disclaimer .clause {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 0 24px;
    padding: 22px 0;
  }

  .page-disclaimer .clause__num {
    font-size: 16px;
  }

  .page-disclaimer .clause__body p {
    font-size: 16px;
  }
}

@media (min-width: 900px) {
  .page-disclaimer .usage-masthead__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    gap: 48px;
    align-items: center;
  }

  .page-disclaimer .usage-masthead__media {
    aspect-ratio: 16 / 6;
  }

  .page-disclaimer .clause-list {
    max-width: 1050px;
  }

  .page-disclaimer .usage-block__head {
    margin-bottom: 30px;
  }
}

@media (max-width: 479px) {
  .page-disclaimer .usage-next__flow {
    flex-direction: column;
    align-items: stretch;
  }

  .page-disclaimer .usage-next__step {
    width: 100%;
  }

  .page-disclaimer .usage-next__arrow {
    align-self: center;
    transform: rotate(90deg);
  }
}