.page-disclaimer {
  --u-mark: 4.5rem;
  --u-gap: clamp(1.75rem, 4vw, 3.5rem);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  padding-top: calc(var(--header-h) + 2.25rem);
  padding-bottom: clamp(2rem, 5vw, 3rem);
  background:
    radial-gradient(130% 90% at 6% 0%, rgba(228, 241, 240, 0.95) 0%, rgba(228, 241, 240, 0) 62%),
    var(--paper);
  border-bottom: 1px solid var(--line-mid);
}

.page-disclaimer .usage-hero__inner {
  display: grid;
  gap: 2rem;
  padding-bottom: clamp(2rem, 5vw, 3rem);
}

.page-disclaimer .usage-hero h1 {
  margin: 0.7rem 0 1rem;
  font-size: clamp(1.85rem, 5.4vw, 3.25rem);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-disclaimer .usage-hero__lede {
  max-width: 38em;
  margin: 0;
  font-size: clamp(1.0625rem, 1.6vw, 1.1875rem);
  line-height: 1.85;
  color: var(--ink);
}

.page-disclaimer .usage-panel {
  border: 1px solid var(--line-mid);
  border-left: 4px solid var(--red);
  background: rgba(255, 255, 255, 0.72);
  padding: 1.15rem 1.25rem 1.35rem;
}

.page-disclaimer .usage-panel__title {
  margin: 0 0 0.9rem;
  font-size: 0.875rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-disclaimer .usage-panel dl {
  margin: 0;
  display: grid;
  gap: 0.7rem;
}

.page-disclaimer .usage-panel dl > div {
  display: grid;
  grid-template-columns: 6.75rem minmax(0, 1fr);
  gap: 0.5rem 0.75rem;
  align-items: baseline;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line);
}

.page-disclaimer .usage-panel dl > div:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-disclaimer .usage-panel dt {
  font-size: 0.875rem;
  color: var(--gray);
}

.page-disclaimer .usage-panel dd {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
}

/* ---------- 顶部图带 ---------- */
.page-disclaimer .usage-band {
  margin: 0;
}

.page-disclaimer .usage-band img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 320px;
  object-fit: cover;
  border: 1px solid var(--line-mid);
  background: var(--cyan-mist);
}

.page-disclaimer .usage-band__cap {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  color: var(--gray);
}

/* ---------- 章节骨架 ---------- */
.page-disclaimer .usage-sec {
  padding: clamp(2.5rem, 6vw, 4.75rem) 0;
}

.page-disclaimer .usage-sec__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
}

.page-disclaimer .usage-sec__num {
  margin: 0;
  font-size: 0.875rem;
  letter-spacing: 0.2em;
  color: var(--red);
}

.page-disclaimer .usage-sec__title {
  margin: 0 0 0.85rem;
  font-size: clamp(1.375rem, 2.8vw, 2rem);
  line-height: 1.26;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-disclaimer .usage-sec__intro {
  max-width: 40em;
  margin: 0 0 1.6rem;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-disclaimer .usage-sec__tail {
  max-width: 44em;
  margin: 1.6rem 0 0;
  font-size: 1rem;
  line-height: 1.85;
}

.page-disclaimer .usage-sec__body a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

/* ---------- 规则清单 ---------- */
.page-disclaimer .usage-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-mid);
}

.page-disclaimer .usage-list__item {
  display: grid;
  gap: 0.4rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .usage-list__key {
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-disclaimer .usage-list__text {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink);
  max-width: 44em;
}

/* ---------- 折叠问答 ---------- */
.page-disclaimer .usage-fold {
  margin-top: 1.5rem;
  border: 1px solid var(--line-mid);
  background: rgba(255, 255, 255, 0.75);
}

.page-disclaimer .usage-fold + .usage-fold {
  margin-top: -1px;
}

.page-disclaimer .usage-fold summary {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0.95rem 3rem 0.95rem 1.05rem;
  position: relative;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--cyan-deep);
}

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

.page-disclaimer .usage-fold summary::after {
  content: "+";
  position: absolute;
  right: 1.05rem;
  font-family: var(--mono);
  font-size: 1.125rem;
  color: var(--red);
}

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

.page-disclaimer .usage-fold__a {
  margin: 0;
  padding: 0 1.05rem 1.15rem;
  max-width: 46em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink);
}

/* ---------- 章节底色节奏 ---------- */
.page-disclaimer .usage-sec--mist {
  background: var(--cyan-mist);
  border-top: 1px solid rgba(14, 110, 107, 0.16);
  border-bottom: 1px solid rgba(14, 110, 107, 0.16);
}

.page-disclaimer .usage-sec--redmist {
  background: var(--red-mist);
  border-top: 1px solid rgba(193, 18, 31, 0.14);
  border-bottom: 1px solid rgba(193, 18, 31, 0.14);
}

.page-disclaimer .usage-sec--deep {
  background: var(--red-deep);
  color: var(--paper);
}

.page-disclaimer .usage-sec--deep .usage-sec__num {
  color: var(--gold);
}

.page-disclaimer .usage-sec--deep .usage-sec__title {
  color: #FFFFFF;
}

.page-disclaimer .usage-sec--deep .usage-sec__intro,
.page-disclaimer .usage-sec--deep .usage-sec__tail {
  color: rgba(252, 251, 249, 0.86);
}

.page-disclaimer .usage-sec--deep .usage-sec__body a {
  color: var(--gold);
}

/* ---------- 备案信息卡 ---------- */
.page-disclaimer .usage-record {
  display: grid;
  gap: 1.1rem;
  margin-top: 0.25rem;
  padding: 1.25rem;
  border: 1px solid rgba(201, 162, 39, 0.6);
  background: rgba(0, 0, 0, 0.14);
}

.page-disclaimer .usage-record__item {
  display: grid;
  gap: 0.3rem;
}

.page-disclaimer .usage-record__label {
  font-size: 0.875rem;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-disclaimer .usage-record__value {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: #FFFFFF;
}

.page-disclaimer .usage-record__value--mono {
  font-family: var(--mono);
  letter-spacing: 0.02em;
  word-break: break-word;
}

/* ---------- 焦点与动效 ---------- */
.page-disclaimer a:focus-visible,
.page-disclaimer summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-disclaimer .usage-sec--deep a:focus-visible {
  outline-color: var(--gold);
}

.page-disclaimer .usage-fold summary {
  transition: background-color var(--t) var(--ease), color var(--t) var(--ease);
}

.page-disclaimer .usage-fold summary:hover {
  background-color: var(--red-mist);
}

/* ---------- 宽窄交替与桌面栅格 ---------- */
@media (min-width: 760px) {
  .page-disclaimer .usage-hero__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    column-gap: clamp(2rem, 5vw, 4rem);
    align-items: end;
  }

  .page-disclaimer .usage-sec__grid {
    grid-template-columns: var(--u-mark) minmax(0, 1fr);
    column-gap: 1.75rem;
  }

  .page-disclaimer .usage-sec__num {
    padding-top: 0.45rem;
  }

  .page-disclaimer .usage-list__item {
    grid-template-columns: 9.5rem minmax(0, 1fr);
    gap: 0.35rem 1.5rem;
    align-items: baseline;
    padding: 1.15rem 0;
  }

  .page-disclaimer .usage-record {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem 2rem;
    padding: 1.5rem 1.6rem;
  }

  .page-disclaimer .usage-record__item--full {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-disclaimer .usage-sec--narrow .usage-sec__grid {
    padding-left: clamp(0rem, 7vw, 6.5rem);
  }

  .page-disclaimer .usage-sec--narrow .usage-sec__body {
    max-width: 44rem;
  }

  .page-disclaimer .usage-sec--wide .usage-sec__body {
    max-width: 62rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-fold summary {
    transition: none;
  }
}
<<<END>>>