.page-disclaimer {
  --disc-line-soft: rgba(31, 90, 76, .42);
  --disc-gold-line: rgba(201, 162, 39, .34);
  background: var(--ink-900);
  color: var(--paper-100);
  padding-bottom: clamp(56px, 8vw, 104px);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  padding: clamp(22px, 4vw, 40px) 0 clamp(44px, 6vw, 76px);
  border-bottom: 2px solid var(--line-500);
}

.page-disclaimer .usage-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(31, 90, 76, .3) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31, 90, 76, .3) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .6), transparent 80%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .6), transparent 80%);
  pointer-events: none;
}

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

.page-disclaimer .usage-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(18px, 2.4vw, 28px);
}

.page-disclaimer .usage-hero__copy .eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold-500);
}

.page-disclaimer .usage-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.02em;
  font-size: clamp(32px, 7vw, 64px);
  line-height: 1.1;
  color: var(--paper-100);
  margin: 10px 0 0;
}

.page-disclaimer .usage-hero__lead {
  margin: 18px 0 0;
  max-width: 46ch;
  color: var(--paper-dim);
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
}

.page-disclaimer .usage-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-disclaimer .usage-hero__media {
  margin: 0;
}

.page-disclaimer .usage-hero__media .media-frame {
  display: block;
  border: 2px solid var(--line-500);
  box-shadow: var(--hard-1);
  overflow: hidden;
  background: var(--ink-700);
}

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

.page-disclaimer .usage-hero__media .media-frame__caption {
  margin: 14px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--disc-gold-line);
  font-size: 13px;
  line-height: 1.75;
  color: var(--paper-faint);
}

.page-disclaimer .usage-hero__fade {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 3px;
  background: linear-gradient(90deg, transparent 0%, var(--gold-500) 20%, var(--gold-300) 48%, var(--cinnabar-500) 74%, transparent 100%);
  opacity: .9;
  pointer-events: none;
}

/* ---------- 目录 ---------- */
.page-disclaimer .usage-toc {
  margin: clamp(32px, 5vw, 56px) 0 clamp(40px, 6vw, 72px);
  padding: clamp(20px, 3vw, 30px) clamp(18px, 3vw, 34px);
  background: var(--ink-700);
  border: var(--frame);
  border-left: 6px solid var(--gold-500);
  box-shadow: var(--hard-1);
}

.page-disclaimer .usage-toc__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold-300);
}

.page-disclaimer .usage-toc__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-disclaimer .usage-toc__item {
  margin: 0;
}

.page-disclaimer .usage-toc__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 10px;
  color: var(--paper-dim);
  text-decoration: none;
  border: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}

.page-disclaimer .usage-toc__link:hover,
.page-disclaimer .usage-toc__link:focus-visible {
  color: var(--paper-100);
  border-color: var(--disc-gold-line);
  background: rgba(201, 162, 39, .08);
}

.page-disclaimer .usage-toc__num {
  flex: none;
  font-size: 13px;
  color: var(--gold-500);
}

/* ---------- 条款分组 ---------- */
.page-disclaimer .usage-group {
  padding-top: clamp(26px, 4vw, 44px);
  border-top: 1px dashed var(--disc-line-soft);
  scroll-margin-top: 40px;
}

.page-disclaimer .usage-group + .usage-group {
  margin-top: clamp(34px, 5vw, 60px);
}

.page-disclaimer .usage-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  margin-bottom: clamp(12px, 2vw, 20px);
}

.page-disclaimer .usage-group__num {
  flex: none;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--gold-500);
}

.page-disclaimer .usage-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -.01em;
  font-size: clamp(20px, 3.2vw, 30px);
  line-height: 1.3;
  color: var(--paper-100);
}

.page-disclaimer .usage-readonly {
  position: relative;
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate-200);
  background: rgba(126, 148, 144, .1);
  border: 1px dashed var(--slate-400);
  cursor: help;
}

.page-disclaimer .usage-readonly::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--slate-400);
  flex: none;
}

.page-disclaimer .usage-readonly::after {
  content: "旧版主页存档仅可翻阅，页面不响应操作，也不再随新版本更新。";
  position: absolute;
  left: 0;
  top: calc(100% + 8px);
  z-index: 6;
  width: max-content;
  max-width: min(280px, 78vw);
  padding: 9px 12px;
  background: var(--ink-700);
  border: 1px solid var(--slate-400);
  color: var(--slate-200);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
}

.page-disclaimer .usage-readonly:hover::after,
.page-disclaimer .usage-readonly:focus-visible::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 编号条目 ---------- */
.page-disclaimer .usage-clause {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 18px 0;
  border-bottom: 1px solid var(--disc-line-soft);
  scroll-margin-top: 40px;
}

.page-disclaimer .usage-clause__num {
  align-self: start;
  padding-top: 3px;
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--gold-500);
  text-decoration: none;
  border-bottom: 1px dashed transparent;
  transition: color .18s ease, border-color .18s ease;
}

.page-disclaimer .usage-clause__num:hover,
.page-disclaimer .usage-clause__num:focus-visible {
  color: var(--gold-300);
  border-bottom-color: var(--gold-300);
}

.page-disclaimer .usage-clause__body p {
  margin: 0;
  color: var(--paper-dim);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
}

.page-disclaimer .usage-clause:target {
  background: linear-gradient(90deg, rgba(201, 162, 39, .13), rgba(201, 162, 39, 0) 78%);
  box-shadow: inset 4px 0 0 var(--cinnabar-500);
}

/* ---------- 页尾指引 ---------- */
.page-disclaimer .usage-tail {
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--disc-gold-line);
  display: grid;
  gap: 20px;
}

.page-disclaimer .usage-tail__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper-faint);
}

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

.page-disclaimer .usage-tail__link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold-300);
  text-decoration: none;
  padding: 9px 15px;
  border: 1px solid rgba(201, 162, 39, .4);
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}

.page-disclaimer .usage-tail__link:hover,
.page-disclaimer .usage-tail__link:focus-visible {
  background: rgba(201, 162, 39, .14);
  color: var(--paper-100);
  border-color: var(--gold-500);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-disclaimer .usage-toc__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 32px;
  }

  .page-disclaimer .usage-clause {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 4px 28px;
    padding: 22px 0;
  }
}

@media (min-width: 900px) {
  .page-disclaimer .usage-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: end;
    gap: clamp(32px, 4vw, 64px);
  }
}

@media (min-width: 860px) {
  .page-disclaimer .usage-tail {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

@media (max-width: 560px) {
  .page-disclaimer .usage-readonly {
    margin-left: 0;
  }

  .page-disclaimer .usage-toc__link {
    padding: 8px 6px;
  }

  .page-disclaimer .usage-hero__media .media-frame__caption {
    padding-left: 10px;
  }
}
<<<END>>>