.page-disclaimer {
  --ud-line: rgba(43, 232, 208, 0.18);
  --ud-panel: rgba(22, 35, 58, 0.74);
  --ud-panel-soft: rgba(22, 35, 58, 0.44);
  --ud-radius: clamp(16px, 2.2vw, 26px);
  --ud-gap: clamp(28px, 5vw, 64px);
  position: relative;
  padding-bottom: clamp(48px, 8vw, 104px);
  background:
    radial-gradient(1100px 520px at 84% -8%, rgba(43, 232, 208, 0.10), transparent 62%),
    radial-gradient(760px 420px at 2% 20%, rgba(255, 107, 44, 0.08), transparent 66%),
    var(--ink);
  color: var(--paper);
  overflow: hidden;
}

.page-disclaimer .breadcrumb {
  padding-top: clamp(16px, 3vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  padding: clamp(18px, 3vw, 34px) 0 clamp(26px, 4vw, 46px);
}

.page-disclaimer .usage-hero::before {
  content: "";
  position: absolute;
  inset: -70px -12vw 12%;
  background-image:
    linear-gradient(rgba(124, 138, 165, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 138, 165, 0.12) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 92%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 92%);
  pointer-events: none;
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  right: -16vw;
  top: 8%;
  width: min(54vw, 640px);
  height: 190px;
  background: linear-gradient(100deg, rgba(255, 107, 44, 0.22), rgba(255, 107, 44, 0));
  transform: rotate(-11deg);
  pointer-events: none;
}

.page-disclaimer .usage-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.6vw, 40px);
  align-items: end;
}

.page-disclaimer .usage-hero__copy {
  min-width: 0;
}

.page-disclaimer .usage-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-size: clamp(32px, 6.6vw, 62px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-disclaimer .usage-hero__lead {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.78;
  color: rgba(244, 237, 226, 0.76);
}

.page-disclaimer .usage-hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-hero__badges li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(11, 18, 32, 0.6);
  font-size: 13px;
  color: rgba(244, 237, 226, 0.78);
}

.page-disclaimer .usage-hero__badges .data-num {
  font-size: 15px;
  font-weight: 700;
  color: var(--gold);
}

.page-disclaimer .usage-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--ud-radius);
  overflow: hidden;
  box-shadow: 0 26px 60px rgba(4, 9, 18, 0.55);
}

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

/* ---------- 章节索引 ---------- */
.page-disclaimer .usage-index {
  position: relative;
  z-index: 1;
  padding: 0 0 clamp(16px, 2.6vw, 28px);
}

.page-disclaimer .usage-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-index__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 15px 8px 11px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(22, 35, 58, 0.55);
  color: var(--paper);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-disclaimer .usage-index__link:hover,
.page-disclaimer .usage-index__link:focus-visible {
  border-color: rgba(43, 232, 208, 0.6);
  color: var(--cyan);
  transform: translateY(-2px);
}

.page-disclaimer .usage-index__no {
  font-size: 12px;
  font-weight: 700;
  color: var(--cyan);
}

/* ---------- 规则章节 ---------- */
.page-disclaimer .usage-rule {
  position: relative;
  scroll-margin-top: 96px;
  padding: clamp(28px, 5vw, 60px) 0;
  border-top: 1px solid var(--ud-line);
}

.page-disclaimer .usage-rule__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: start;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-disclaimer .usage-rule__no {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-disclaimer .usage-rule__headtext {
  min-width: 0;
}

.page-disclaimer .usage-rule h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(23px, 3.6vw, 40px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-disclaimer .usage-rule__lead {
  margin: 12px 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: rgba(244, 237, 226, 0.72);
}

.page-disclaimer .usage-rule__foot {
  margin: clamp(18px, 3vw, 26px) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 237, 226, 0.66);
}

/* ---------- 编号条目 ---------- */
.page-disclaimer .rule-list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .rule-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  padding: clamp(14px, 2.2vw, 20px) clamp(14px, 2vw, 22px);
  border-left: 2px solid transparent;
  border-radius: var(--r-sm);
  background: linear-gradient(90deg, var(--ud-panel), rgba(11, 18, 32, 0.55));
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-disclaimer .rule-item:hover,
.page-disclaimer .rule-item:focus-within {
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(22, 35, 58, 0.92), rgba(11, 18, 32, 0.6));
}

.page-disclaimer .rule-item__no {
  padding-top: 3px;
  font-size: 13px;
  font-weight: 700;
  color: var(--orange);
}

.page-disclaimer .rule-item__body {
  min-width: 0;
}

.page-disclaimer .rule-item__body h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-disclaimer .rule-item__body p {
  margin: 8px 0 0;
  font-size: clamp(14px, 1.7vw, 16px);
  line-height: 1.8;
  color: rgba(244, 237, 226, 0.72);
}

.page-disclaimer .rule-tag {
  grid-column: 2;
  justify-self: start;
  align-self: center;
  margin-top: 4px;
  padding: 4px 12px;
  border: 1px solid rgba(242, 178, 75, 0.4);
  border-radius: var(--r-pill);
  background: rgba(242, 178, 75, 0.1);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--gold);
  white-space: nowrap;
}

/* ---------- 版本对照 ---------- */
.page-disclaimer .version-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-disclaimer .version-card {
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--ud-radius);
  background: var(--ud-panel-soft);
}

.page-disclaimer .version-card--current {
  border-color: rgba(43, 232, 208, 0.42);
  background: linear-gradient(155deg, rgba(43, 232, 208, 0.12), rgba(22, 35, 58, 0.78) 58%);
  box-shadow: 0 22px 52px rgba(6, 14, 26, 0.5);
}

.page-disclaimer .version-card__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 1px dashed var(--line-strong);
}

.page-disclaimer .version-card__ver {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--mute);
  letter-spacing: -0.01em;
}

.page-disclaimer .version-card--current .version-card__ver {
  color: var(--cyan);
}

.page-disclaimer .version-card__name {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(244, 237, 226, 0.7);
}

.page-disclaimer .version-card--current .version-card__name {
  color: var(--gold);
}

.page-disclaimer .version-card__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .version-card__list li {
  position: relative;
  padding-left: 18px;
  font-size: clamp(14px, 1.7vw, 15px);
  line-height: 1.72;
  color: rgba(244, 237, 226, 0.78);
}

.page-disclaimer .version-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mute);
}

.page-disclaimer .version-card--current .version-card__list li::before {
  background: var(--cyan);
}

.page-disclaimer .version-note {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--orange);
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 237, 226, 0.74);
}

/* ---------- 纸面联络面板 ---------- */
.page-disclaimer .usage-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 32px);
  padding: clamp(20px, 3.4vw, 40px);
  border-radius: var(--ud-radius);
  background: var(--paper);
  color: var(--text-ink);
  box-shadow: 0 24px 56px rgba(4, 9, 18, 0.45);
}

.page-disclaimer .usage-contact h3 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 800;
  line-height: 1.4;
  color: var(--text-ink);
}

.page-disclaimer .usage-contact__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-contact__list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(16, 22, 31, 0.78);
}

.page-disclaimer .usage-contact__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 12px;
  height: 2px;
  background: var(--orange);
}

.page-disclaimer .usage-contact__label {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(16, 22, 31, 0.55);
}

.page-disclaimer .usage-contact__mail {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2vw, 19px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--teal);
  word-break: break-all;
}

.page-disclaimer .usage-contact__note {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(16, 22, 31, 0.7);
}

/* ---------- 行内链接 ---------- */
.page-disclaimer .inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 208, 0.42);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

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

.page-disclaimer .usage-contact .inline-link {
  color: var(--teal);
  border-bottom-color: rgba(14, 92, 87, 0.42);
}

.page-disclaimer .usage-contact .inline-link:hover,
.page-disclaimer .usage-contact .inline-link:focus-visible {
  border-bottom-color: var(--teal);
}

/* ---------- 桌面端布局 ---------- */
@media (min-width: 860px) {
  .page-disclaimer .usage-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: clamp(28px, 4vw, 52px);
  }

  .page-disclaimer .rule-item {
    grid-template-columns: 62px minmax(0, 1fr) auto;
    align-items: start;
    gap: 4px 18px;
  }

  .page-disclaimer .rule-item__no {
    text-align: right;
  }

  .page-disclaimer .rule-tag {
    grid-column: 3;
    grid-row: 1;
    align-self: start;
    margin-top: 2px;
  }

  .page-disclaimer .version-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 20px;
  }

  .page-disclaimer .usage-contact {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-disclaimer .usage-contact__side {
    padding-left: clamp(18px, 2.4vw, 28px);
    border-left: 1px solid var(--line-paper);
  }
}

@media (min-width: 1100px) {
  .page-disclaimer .usage-rule__head {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 6px 24px;
  }

  .page-disclaimer .usage-rule__no {
    text-align: right;
    font-size: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-index__link,
  .page-disclaimer .rule-item,
  .page-disclaimer .inline-link {
    transition: none;
  }

  .page-disclaimer .usage-index__link:hover,
  .page-disclaimer .usage-index__link:focus-visible {
    transform: none;
  }
}