.page-disclaimer {
  --disc-pad: 22px;
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  padding-top: 128px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .usage-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.3;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), transparent 88%);
}

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

.page-disclaimer .crumb {
  margin-bottom: 26px;
}

.page-disclaimer .hero-inner {
  padding: clamp(26px, 4vw, 46px) clamp(20px, 3.6vw, 44px);
  background: linear-gradient(180deg, rgba(19, 41, 61, 0.82), rgba(11, 27, 43, 0.55));
}

.page-disclaimer .usage-title {
  font-family: var(--font-head);
  font-size: clamp(48px, 11.5vw, 132px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin: 10px 0 0;
  word-break: keep-all;
}

.page-disclaimer .lede {
  max-width: 62ch;
  margin: 22px 0 0;
  color: var(--grey);
  font-size: 16px;
  line-height: 1.85;
}

.page-disclaimer .usage-legend {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin: 30px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
}

.page-disclaimer .usage-legend li {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--grey);
}

.page-disclaimer .legend-key {
  width: 12px;
  height: 12px;
  flex: none;
  display: inline-block;
}

.page-disclaimer .legend-key--gold {
  background: var(--gold);
}

.page-disclaimer .legend-key--cinnabar {
  background: var(--cinnabar);
}

.page-disclaimer .legend-key--celadon {
  background: var(--celadon);
}

/* ---------- 章节题头 ---------- */
.page-disclaimer .disc-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 26px;
}

.page-disclaimer .disc-index {
  flex: none;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cinnabar);
  border: 1px solid var(--cinnabar);
  padding: 3px 8px 2px;
  line-height: 1;
}

.page-disclaimer .disc-title {
  font-family: var(--font-head);
  font-size: clamp(23px, 3.4vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--paper);
  margin: 0;
}

.page-disclaimer .disc-rule {
  flex: 1 1 auto;
  height: 1px;
  background: var(--line);
  transform: translateY(-6px);
}

/* ---------- 引文条 ---------- */
.page-disclaimer .split-note {
  border-left: 3px solid var(--celadon);
  background: rgba(79, 143, 123, 0.08);
  padding: 16px 20px;
  margin-bottom: 24px;
}

.page-disclaimer .split-note p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
}

/* ---------- 条款卡片网格 ---------- */
.page-disclaimer .card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-disclaimer .usage-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--disc-pad);
  background: var(--panel);
  border: 1px solid var(--line);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-disclaimer .usage-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 0;
  background: var(--gold);
  transition: height var(--dur) var(--ease);
}

.page-disclaimer .usage-card:hover,
.page-disclaimer .usage-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--gold);
}

.page-disclaimer .usage-card:hover::before,
.page-disclaimer .usage-card:focus-within::before {
  height: 100%;
}

.page-disclaimer .card-num {
  display: block;
  font-family: var(--font-body);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--gold);
  margin-bottom: 14px;
}

.page-disclaimer .card-title {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.005em;
  color: var(--paper);
  margin: 0 0 10px;
}

.page-disclaimer .card-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--grey);
}

.page-disclaimer .card-more {
  margin-top: auto;
  padding-top: 14px;
}

.page-disclaimer .card-more > summary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--celadon);
  border-bottom: 1px dashed rgba(79, 143, 123, 0.5);
  padding-bottom: 3px;
  transition: color var(--dur) var(--ease);
}

.page-disclaimer .card-more > summary::-webkit-details-marker {
  display: none;
}

.page-disclaimer .card-more > summary::before {
  content: "＋";
  font-size: 12px;
  line-height: 1;
}

.page-disclaimer .card-more[open] > summary::before {
  content: "－";
}

.page-disclaimer .card-more > summary:hover,
.page-disclaimer .card-more > summary:focus-visible {
  color: var(--gold-soft);
}

.page-disclaimer .card-more > p {
  margin: 12px 0 0;
  padding-left: 14px;
  border-left: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.85;
  color: var(--grey);
}

/* ---------- 示意图 ---------- */
.page-disclaimer .tag-figure {
  margin: 30px 0 0;
  border: 1px solid var(--line);
  background: var(--panel);
}

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

.page-disclaimer .tag-figure figcaption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--grey);
}

/* ---------- 反馈面板 ---------- */
.page-disclaimer .feedback-panel {
  position: relative;
  margin-top: 34px;
  padding: 30px 22px 26px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
}

.page-disclaimer .stamp {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cinnabar);
  border: 1px solid var(--cinnabar);
  padding: 3px 9px;
  margin-bottom: 16px;
  transform: rotate(-2deg);
}

.page-disclaimer .feedback-title {
  font-family: var(--font-head);
  font-size: clamp(21px, 3vw, 28px);
  font-weight: 700;
  letter-spacing: -0.005em;
  color: var(--paper);
  margin: 0 0 12px;
}

.page-disclaimer .feedback-text {
  max-width: 66ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--grey);
}

.page-disclaimer .feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-disclaimer .feedback-links {
  margin: 18px 0 0;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--grey);
}

.page-disclaimer .feedback-links a {
  color: var(--celadon);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 143, 123, 0.45);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-disclaimer .feedback-links a:hover,
.page-disclaimer .feedback-links a:focus-visible {
  color: var(--gold-soft);
  border-bottom-color: var(--gold-soft);
}

.page-disclaimer .link-sep {
  margin: 0 8px;
  color: var(--line);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-disclaimer .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-disclaimer .card-grid > .usage-card:last-child:nth-child(odd) {
    grid-column: 1 / -1;
  }

  .page-disclaimer .usage-card {
    --disc-pad: 26px;
  }

  .page-disclaimer .feedback-panel {
    padding: 38px 36px 34px;
  }
}

@media (min-width: 1040px) {
  .page-disclaimer .usage-hero {
    padding-top: 156px;
    padding-bottom: 72px;
  }

  .page-disclaimer .card-grid {
    gap: 20px;
  }

  .page-disclaimer .tag-figure {
    margin-top: 36px;
  }
}

@media (max-width: 420px) {
  .page-disclaimer .usage-legend {
    gap: 10px 18px;
  }

  .page-disclaimer .disc-head {
    flex-wrap: wrap;
    gap: 10px;
  }

  .page-disclaimer .disc-rule {
    display: none;
  }
}