.page-disclaimer {
  --uso-shadow-soft: 0 1px 0 rgba(20, 28, 30, .05);
  background: var(--paper);
  color: var(--ink-2);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .uso-hero {
  position: relative;
  padding: calc(var(--header-h) + 34px) 0 clamp(40px, 7vw, 78px);
  background: linear-gradient(180deg, var(--paper-3) 0%, var(--paper) 78%);
  overflow: hidden;
}

.page-disclaimer .uso-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -14%;
  width: 52vw;
  height: 52vw;
  max-width: 640px;
  max-height: 640px;
  border-radius: 50%;
  background: radial-gradient(circle at 42% 42%, rgba(127, 168, 166, .30), transparent 68%);
  pointer-events: none;
  z-index: 0;
}

.page-disclaimer .uso-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, transparent 0 58px, rgba(127, 168, 166, .13) 58px 59px);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 26%, #000 74%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 26%, #000 74%, transparent);
  z-index: 0;
}

.page-disclaimer .uso-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 34px;
  align-items: end;
}

.page-disclaimer .uso-hero .breadcrumb {
  margin: 0 0 22px;
  font-size: 12.5px;
}

.page-disclaimer .uso-hero .eyebrow {
  margin: 0 0 14px;
}

.page-disclaimer .uso-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 7.6vw, 62px);
  line-height: 1.14;
  letter-spacing: -.012em;
  color: var(--ink);
  margin: 0;
  max-width: 15ch;
}

.page-disclaimer .uso-hero__lede {
  font-family: var(--font-body);
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.88;
  color: var(--ink-2);
  max-width: 60ch;
  margin: 20px 0 0;
}

.page-disclaimer .uso-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-disclaimer .uso-hero__tags li {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .02em;
  line-height: 1.5;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--brass);
  background: var(--paper-2);
  color: var(--muted);
}

.page-disclaimer .uso-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-top: 3px solid var(--brass);
  background: var(--paper-2);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.page-disclaimer .uso-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 规则区 ---------- */
.page-disclaimer .uso-rules {
  padding: clamp(48px, 8vw, 92px) 0;
  background: var(--paper);
}

.page-disclaimer .uso-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px dashed var(--line);
}

.page-disclaimer .uso-head .eyebrow {
  margin: 0 0 8px;
}

.page-disclaimer .uso-head__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 4.6vw, 36px);
  line-height: 1.25;
  color: var(--ink);
  margin: 0;
}

.page-disclaimer .uso-head__aside {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--muted);
  margin: 0;
}

.page-disclaimer .uso-clause {
  position: relative;
  display: grid;
  gap: 14px;
  padding: clamp(22px, 3.6vw, 34px);
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--brass);
  box-shadow: var(--uso-shadow-soft);
  transition: border-left-color .35s var(--ease), background .35s var(--ease), box-shadow .35s var(--ease);
}

.page-disclaimer .uso-clause + .uso-clause {
  margin-top: 14px;
}

.page-disclaimer .uso-clause.is-active {
  border-left-color: var(--seal);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.page-disclaimer .uso-clause__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--brass);
  transition: color .35s var(--ease);
}

.page-disclaimer .uso-clause.is-active .uso-clause__num {
  color: var(--seal);
}

.page-disclaimer .uso-clause__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.4vw, 25px);
  line-height: 1.35;
  color: var(--ink);
  margin: 0 0 14px;
}

.page-disclaimer .uso-clause__main p {
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.88;
  color: var(--ink-2);
  margin: 0 0 12px;
}

.page-disclaimer .uso-clause__main p:last-child {
  margin-bottom: 0;
}

.page-disclaimer .uso-clause__note {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted) !important;
  border-left: 2px solid var(--brass);
  padding-left: 12px;
  margin: 18px 0 0 !important;
}

/* ---------- 折叠问答 ---------- */
.page-disclaimer .uso-faq {
  padding: clamp(48px, 8vw, 88px) 0;
  background: var(--paper-3);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .uso-head--stack {
  border-bottom-color: rgba(31, 58, 68, .22);
}

.page-disclaimer .uso-faq__list {
  display: grid;
  gap: 10px;
}

.page-disclaimer .uso-faq details.fold {
  border: 1px solid var(--line);
  background: var(--paper);
  transition: border-color .3s var(--ease);
}

.page-disclaimer .uso-faq details.fold[open] {
  border-color: var(--stone);
}

.page-disclaimer .uso-faq .fold__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--ink);
}

.page-disclaimer .uso-faq .fold__head::-webkit-details-marker {
  display: none;
}

.page-disclaimer .uso-faq .fold__head::after {
  content: "＋";
  flex: none;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--brass);
  transition: color .3s var(--ease);
}

.page-disclaimer .uso-faq details.fold[open] .fold__head::after {
  content: "－";
  color: var(--seal);
}

.page-disclaimer .uso-faq .fold__body {
  padding: 0 18px 20px;
  border-top: 1px dashed var(--line);
  padding-top: 16px;
  margin: 0 0 0;
}

.page-disclaimer .uso-faq .fold__body p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.88;
  color: var(--ink-2);
  margin: 0;
}

/* ---------- 更新与联系 ---------- */
.page-disclaimer .uso-update {
  position: relative;
  padding: clamp(52px, 9vw, 100px) 0;
  background: var(--ink-2);
  color: var(--paper);
  overflow: hidden;
}

.page-disclaimer .uso-update::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(0deg, transparent 0 40px, rgba(127, 168, 166, .10) 40px 41px);
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 82%);
  mask-image: linear-gradient(180deg, #000, transparent 82%);
}

.page-disclaimer .uso-update__inner {
  position: relative;
  z-index: 1;
}

.page-disclaimer .uso-update .eyebrow {
  color: var(--brass);
  margin: 0 0 14px;
}

.page-disclaimer .uso-update__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3.8vw, 38px);
  line-height: 1.28;
  color: var(--paper);
  margin: 0 0 18px;
}

.page-disclaimer .uso-update__text {
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(244, 241, 234, .84);
  margin: 0 0 28px;
  max-width: 64ch;
}

.page-disclaimer .uso-update__contact {
  display: grid;
  gap: 16px;
  margin: 0 0 26px;
  padding: 20px 22px;
  border: 1px solid rgba(201, 162, 39, .42);
  background: rgba(244, 241, 234, .05);
}

.page-disclaimer .uso-update__contact dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--brass);
  margin: 0 0 6px;
}

.page-disclaimer .uso-update__contact dd {
  margin: 0;
  font-size: 15px;
  letter-spacing: .01em;
  color: var(--paper);
  word-break: break-all;
}

.page-disclaimer .uso-update__hint {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.88;
  color: rgba(244, 241, 234, .7);
  margin: 0;
}

.page-disclaimer .uso-update__hint a {
  color: var(--brass);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-disclaimer .uso-update__hint a:hover,
.page-disclaimer .uso-update__hint a:focus-visible {
  color: var(--amber);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-disclaimer .uso-update__contact {
    grid-template-columns: 1fr 1fr;
    gap: 20px 32px;
  }

  .page-disclaimer .uso-head {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
    gap: 28px;
  }

  .page-disclaimer .uso-head__aside {
    padding-bottom: 4px;
    text-align: right;
  }
}

@media (min-width: 900px) {
  .page-disclaimer .uso-clause {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-disclaimer .uso-clause__num {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (min-width: 1000px) {
  .page-disclaimer .uso-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: 56px;
  }

  .page-disclaimer .uso-hero__figure {
    margin-bottom: 0;
  }
}

@media (min-width: 1200px) {
  .page-disclaimer .uso-hero h1 {
    max-width: 13ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .uso-clause,
  .page-disclaimer .uso-clause__num,
  .page-disclaimer .uso-faq details.fold {
    transition: none;
  }
}