.page-disclaimer {
  --usage-panel-bg: linear-gradient(180deg, rgba(18, 58, 94, .72), rgba(10, 37, 64, .72));
  --usage-note-bg: linear-gradient(180deg, rgba(255, 138, 61, .10), rgba(10, 37, 64, .72));
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-intro {
  position: relative;
  padding: clamp(26px, 6vw, 62px) 0 clamp(20px, 4vw, 38px);
  overflow: hidden;
  scroll-margin-top: var(--header-offset);
}

.page-disclaimer .usage-intro::before {
  content: "";
  position: absolute;
  inset: -30% -18% auto -18%;
  height: 480px;
  background:
    radial-gradient(55% 70% at 18% 0%, rgba(43, 232, 208, .18), transparent 68%),
    radial-gradient(48% 62% at 84% 8%, rgba(255, 138, 61, .12), transparent 70%);
  pointer-events: none;
}

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

.page-disclaimer .usage-intro__copy {
  max-width: 74ch;
  margin-top: clamp(14px, 3vw, 26px);
}

.page-disclaimer .usage-intro__copy .lead {
  margin: 18px 0 0;
  max-width: 62ch;
}

/* 条款定位条 */
.page-disclaimer .usage-jump {
  margin-top: clamp(22px, 3vw, 30px);
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-disclaimer .usage-jump__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--slate);
  text-transform: uppercase;
}

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

.page-disclaimer .usage-jump__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(10, 37, 64, .62);
  color: var(--mist);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  transition: border-color .18s var(--ease), color .18s var(--ease), transform .18s var(--ease);
}

.page-disclaimer .usage-jump__link:hover,
.page-disclaimer .usage-jump__link:focus-visible {
  border-color: var(--line-strong);
  color: var(--cyan-soft);
  transform: translateY(-2px);
}

.page-disclaimer .usage-jump__no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

/* 首屏横幅图 */
.page-disclaimer .usage-banner {
  position: relative;
  margin: clamp(26px, 4vw, 46px) 0 0;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(18, 58, 94, .9), rgba(4, 18, 31, .95));
}

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

.page-disclaimer .usage-banner__cap {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(1, 7, 13, .72);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--cyan-soft);
}

/* ---------- 条款区块 ---------- */
.page-disclaimer .usage-clause {
  position: relative;
  padding: clamp(38px, 6vw, 74px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: var(--header-offset);
}

.page-disclaimer .clause-grid {
  display: grid;
  gap: 24px;
}

.page-disclaimer .clause-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 16px;
}

.page-disclaimer .clause-no {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-disclaimer .usage-clause:nth-child(even) .clause-no {
  color: var(--amber);
}

.page-disclaimer .clause-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.2vw, 44px);
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-disclaimer .clause-lead {
  margin: 0 0 20px;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--mist);
}

.page-disclaimer .clause-lead:last-child {
  margin-bottom: 0;
}

.page-disclaimer .clause-lead a,
.page-disclaimer .rule-list a,
.page-disclaimer .fold__body a,
.page-disclaimer .note-card a,
.page-disclaimer .flow-card a,
.page-disclaimer .usage-foot a {
  color: var(--cyan-soft);
  text-decoration: underline;
  text-decoration-color: rgba(43, 232, 208, .45);
  text-underline-offset: 3px;
  transition: color .18s var(--ease), text-decoration-color .18s var(--ease);
}

.page-disclaimer .clause-lead a:hover,
.page-disclaimer .rule-list a:hover,
.page-disclaimer .fold__body a:hover,
.page-disclaimer .note-card a:hover,
.page-disclaimer .flow-card a:hover,
.page-disclaimer .usage-foot a:hover {
  color: var(--amber);
  text-decoration-color: currentColor;
}

/* 设备卡 */
.page-disclaimer .device-grid {
  display: grid;
  gap: 14px;
  margin: 0 0 22px;
}

.page-disclaimer .device-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--usage-panel-bg);
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}

.page-disclaimer .device-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.page-disclaimer .device-card__icon {
  width: 40px;
  height: 40px;
  color: var(--cyan);
}

.page-disclaimer .device-card__icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.page-disclaimer .device-card__name {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan-soft);
}

.page-disclaimer .device-card__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* 条目列表 */
.page-disclaimer .rule-list {
  display: grid;
  gap: 12px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-disclaimer .rule-list li {
  position: relative;
  padding-left: 24px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-disclaimer .rule-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 10px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
}

/* 提示块 */
.page-disclaimer .note-card {
  padding: 16px 18px 16px 20px;
  border-left: 2px solid var(--orange);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--usage-note-bg);
  transition: transform .18s var(--ease), border-left-color .18s var(--ease);
}

.page-disclaimer .note-card:hover {
  transform: translateY(-3px);
  border-left-color: var(--amber);
}

.page-disclaimer .note-card__key {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-disclaimer .note-card p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* 折叠条款 */
.page-disclaimer .fold {
  margin: 0 0 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(10, 37, 64, .55);
  overflow: hidden;
}

.page-disclaimer .fold summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--cyan-soft);
}

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

.page-disclaimer .fold summary::after {
  content: "＋";
  font-size: 15px;
  color: var(--cyan);
}

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

.page-disclaimer .fold__body {
  padding: 0 18px 18px;
}

.page-disclaimer .fold__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* 异常反馈卡 */
.page-disclaimer .flow-grid {
  display: grid;
  gap: 14px;
  margin: 0 0 22px;
}

.page-disclaimer .flow-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18, 58, 94, .5);
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}

.page-disclaimer .flow-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.page-disclaimer .flow-card__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-disclaimer .flow-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.25;
  color: var(--mist);
}

.page-disclaimer .flow-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-disclaimer .flow-card__path {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--slate);
}

/* 侧栏要点 */
.page-disclaimer .clause-aside {
  display: grid;
  gap: 8px;
  align-content: start;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.page-disclaimer .clause-aside p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  line-height: 1.9;
  color: var(--slate);
}

.page-disclaimer .clause-aside__tag {
  color: var(--cyan);
}

/* 收尾 */
.page-disclaimer .usage-foot {
  padding: clamp(36px, 5vw, 62px) 0 clamp(46px, 7vw, 86px);
  border-top: 1px solid var(--line);
}

.page-disclaimer .usage-foot p {
  max-width: 66ch;
  margin: 0 0 22px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--mist);
}

.page-disclaimer .usage-foot__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-disclaimer .usage-banner {
    aspect-ratio: 16 / 6;
  }

  .page-disclaimer .device-grid,
  .page-disclaimer .flow-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-disclaimer .clause-grid {
    grid-template-columns: minmax(0, 1fr) 228px;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-disclaimer .clause-aside {
    padding: 6px 0 6px 18px;
    border-top: 0;
    border-left: 1px solid var(--line);
  }
}

@media (min-width: 1280px) {
  .page-disclaimer .clause-grid {
    grid-template-columns: minmax(0, 1fr) 260px;
  }
}