/* ===== 使用说明页 · page-disclaimer ===== */
.page-disclaimer {
  --disc-max: 68ch;
  --disc-rule: 1px solid var(--c-line);
  background: var(--c-paper);
  color: var(--c-night);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ---------- 页头 ---------- */
.page-disclaimer .disc-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(36px, 6.5vw, 78px) 0 clamp(32px, 4.5vw, 58px);
  background-color: var(--c-night);
  background-image:
    linear-gradient(rgba(201, 212, 220, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 212, 220, 0.06) 1px, transparent 1px);
  background-size: 72px 72px;
  color: var(--c-paper);
  border-bottom: 2px solid var(--c-flag);
}

.page-disclaimer .disc-hero::before {
  content: "";
  position: absolute;
  top: 26%;
  left: -6%;
  width: 112%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(232, 255, 58, 0.7) 24%, rgba(232, 255, 58, 0.7) 76%, transparent);
  transform: rotate(-3.2deg);
  pointer-events: none;
}

.page-disclaimer .disc-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-disclaimer .disc-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(201, 212, 220, 0.72);
}

.page-disclaimer .disc-crumb a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.page-disclaimer .disc-crumb a:hover,
.page-disclaimer .disc-crumb a:focus-visible {
  border-bottom-color: var(--c-cyan);
}

.page-disclaimer .disc-crumb__sep {
  color: var(--c-lake);
}

.page-disclaimer .disc-hero__eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-flag);
}

.page-disclaimer .disc-hero__title {
  margin: 0 0 20px;
  max-width: 24ch;
  font-size: clamp(27px, 5vw, 50px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-disclaimer .disc-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(245, 248, 249, 0.78);
}

/* ---------- 顶部通栏抽象图 ---------- */
.page-disclaimer .disc-banner {
  margin: 0;
  height: 220px;
  overflow: hidden;
  background: var(--c-night);
  border-bottom: var(--disc-rule);
}

.page-disclaimer .disc-banner img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  max-width: 100%;
  filter: saturate(0.72) contrast(1.06);
}

/* ---------- 主体骨架 ---------- */
.page-disclaimer .disc-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: clamp(36px, 5.5vw, 72px) 0 clamp(48px, 7vw, 88px);
}

.page-disclaimer .disc-index {
  min-width: 0;
}

.page-disclaimer .disc-index__list {
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  border-bottom: var(--disc-rule);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-disclaimer .disc-index__list::-webkit-scrollbar {
  display: none;
}

.page-disclaimer .disc-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 10px;
  font-size: 13.5px;
  line-height: 1.45;
  color: var(--c-slate);
  text-decoration: none;
  white-space: nowrap;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-disclaimer .disc-index__link:hover,
.page-disclaimer .disc-index__link:focus-visible {
  color: var(--c-night);
  border-left-color: var(--c-flag);
  background: rgba(14, 110, 122, 0.07);
}

.page-disclaimer .disc-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--c-lake);
  font-variant-numeric: tabular-nums;
}

/* ---------- 条目 ---------- */
.page-disclaimer .disc-sec {
  position: relative;
  margin-top: 42px;
  padding-top: 30px;
  border-top: var(--disc-rule);
  scroll-margin-top: 20px;
}

.page-disclaimer .disc-sec:first-child {
  margin-top: 0;
}

.page-disclaimer .disc-sec::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 52px;
  height: 2px;
  background: var(--c-flag);
  transform: skewX(-32deg);
  transform-origin: left center;
}

.page-disclaimer .disc-sec__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.page-disclaimer .disc-sec__num {
  flex: none;
  padding: 4px 9px;
  background: var(--c-flag);
  color: var(--c-night);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}

.page-disclaimer .disc-sec__title {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 900;
  line-height: 1.32;
  letter-spacing: -0.02em;
  color: var(--c-night);
}

.page-disclaimer .disc-sec p {
  margin: 0 0 1.35em;
  max-width: var(--disc-max);
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-night);
}

.page-disclaimer .disc-sec p:last-child {
  margin-bottom: 0;
}

.page-disclaimer .disc-sec strong {
  font-weight: 700;
  color: var(--c-lake);
}

.page-disclaimer .disc-list {
  margin: 0 0 1.35em;
  padding: 0;
  max-width: var(--disc-max);
  list-style: none;
}

.page-disclaimer .disc-list li {
  position: relative;
  margin-bottom: 12px;
  padding-left: 24px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-night);
}

.page-disclaimer .disc-list li:last-child {
  margin-bottom: 0;
}

.page-disclaimer .disc-list li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 0.72em;
  width: 8px;
  height: 8px;
  background: var(--c-lake);
  transform: rotate(45deg);
}

/* ---------- 引用格式示例 ---------- */
.page-disclaimer .disc-cite {
  max-width: var(--disc-max);
  margin: 0 0 1.35em;
  padding: 20px 22px;
  border: 1px solid var(--c-lake);
  border-left-width: 3px;
  background: linear-gradient(180deg, rgba(14, 110, 122, 0.07), rgba(14, 110, 122, 0.015));
}

.page-disclaimer .disc-cite__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-lake);
}

.page-disclaimer .disc-cite__text {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--c-night);
  overflow-wrap: anywhere;
}

/* ---------- 手写批注 ---------- */
.page-disclaimer .disc-note {
  max-width: 48ch;
  margin: 0 0 1.35em;
  padding: 6px 0 6px 14px;
  border-left: 2px dashed var(--c-cyan);
  font-family: var(--font-hand);
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-lake);
  transform: rotate(-0.5deg);
  transform-origin: left center;
}

/* ---------- 底部行动区 ---------- */
.page-disclaimer .disc-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(38px, 5.5vw, 64px) 0;
  background: var(--c-panel);
  border-top: 2px solid var(--c-flag);
  color: var(--c-paper);
}

.page-disclaimer .disc-cta::after {
  content: "";
  position: absolute;
  left: -5%;
  bottom: 26px;
  width: 110%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(232, 255, 58, 0.3), transparent);
  transform: rotate(-1.6deg);
  pointer-events: none;
}

.page-disclaimer .disc-cta__inner {
  position: relative;
  z-index: 1;
}

.page-disclaimer .disc-cta__title {
  margin: 0 0 14px;
  max-width: 26ch;
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-disclaimer .disc-cta__text {
  margin: 0 0 26px;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(245, 248, 249, 0.76);
}

.page-disclaimer .disc-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-disclaimer .disc-cta__foot {
  margin: 26px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(245, 248, 249, 0.56);
}

.page-disclaimer .disc-cta__foot a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(23, 162, 184, 0.42);
  transition: border-color var(--dur) var(--ease);
}

.page-disclaimer .disc-cta__foot a:hover,
.page-disclaimer .disc-cta__foot a:focus-visible {
  border-bottom-color: var(--c-cyan);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-disclaimer .disc-index__list {
    gap: 6px;
  }

  .page-disclaimer .disc-sec {
    margin-top: 52px;
    padding-top: 34px;
  }
}

@media (min-width: 980px) {
  .page-disclaimer .disc-body {
    grid-template-columns: 184px minmax(0, 1fr);
    gap: 64px;
  }

  .page-disclaimer .disc-index {
    position: sticky;
    top: 28px;
    align-self: start;
  }

  .page-disclaimer .disc-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
    border-bottom: 0;
    border-left: var(--disc-rule);
  }

  .page-disclaimer .disc-index__link {
    display: flex;
    margin-left: -1px;
    white-space: normal;
  }

  .page-disclaimer .disc-sec {
    margin-top: 60px;
    padding-top: 38px;
  }
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 420px) {
  .page-disclaimer .disc-banner {
    height: 170px;
  }

  .page-disclaimer .disc-sec__head {
    gap: 9px;
  }

  .page-disclaimer .disc-list li,
  .page-disclaimer .disc-sec p {
    font-size: 15px;
  }

  .page-disclaimer .disc-cite {
    padding: 16px 16px;
  }

  .page-disclaimer .disc-cta__actions .btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .disc-note,
  .page-disclaimer .disc-hero::before,
  .page-disclaimer .disc-cta::after {
    transform: none;
  }

  .page-disclaimer .disc-cite,
  .page-disclaimer .disc-sec,
  .page-disclaimer .disc-index__link {
    transition-duration: 0ms;
  }
}