/* ===== 使用说明页 · page-disclaimer ===== */
.page-disclaimer {
  --dc-rule: var(--sm-line);
  --dc-readw: 74ch;
  --dc-indent: 0px;
  --dc-tick: repeating-linear-gradient(to right, var(--sm-gold) 0 1px, transparent 1px 8px);
  --dc-tick-lift: repeating-linear-gradient(to right, var(--sm-gold-lift) 0 1px, transparent 1px 8px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

/* --- 面包屑 --- */
.page-disclaimer .dc-crumb {
  margin: clamp(20px, 3vw, 34px) 0 clamp(22px, 3.2vw, 38px);
}

/* --- 首屏 --- */
.page-disclaimer .dc-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 42px);
  align-items: start;
  padding-top: clamp(22px, 3.2vw, 40px);
  border-top: var(--sm-line-w) solid var(--sm-line);
}

.page-disclaimer .dc-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(48%, 360px);
  height: 9px;
  background: var(--dc-tick);
  opacity: 0.5;
  transform: translateY(calc(-50% - 1px));
  pointer-events: none;
}

.page-disclaimer .dc-hero__label {
  display: inline-block;
}

.page-disclaimer .dc-hero__title {
  margin: clamp(14px, 2vw, 20px) 0 0;
  font-size: clamp(30px, 5.6vw, 62px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--sm-bright);
}

.page-disclaimer .dc-hero__lede {
  margin: clamp(16px, 2.2vw, 24px) 0 0;
  max-width: 40em;
  color: var(--sm-body);
}

.page-disclaimer .dc-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  margin-top: clamp(20px, 2.6vw, 30px);
  padding-top: 14px;
  border-top: var(--sm-line-w) solid var(--sm-line);
  font-size: 13px;
  color: var(--sm-blue);
}

.page-disclaimer .dc-hero__metanote {
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-disclaimer .dc-hero__figure {
  margin: 0;
  border: var(--sm-line-w) solid var(--sm-line);
  background: linear-gradient(155deg, var(--sm-purple-deep) 0%, var(--sm-ink-soft) 72%);
  overflow: hidden;
}

.page-disclaimer .dc-hero__figure .sm-media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 2;
  object-fit: cover;
}

.page-disclaimer .dc-hero__figure .sm-media__cap {
  display: block;
  padding: 12px clamp(14px, 2vw, 20px);
  border-top: var(--sm-line-w) solid var(--sm-line);
  font-size: 12px;
  line-height: 1.7;
  color: var(--sm-blue);
}

/* --- 章节块 --- */
.page-disclaimer .dc-block {
  margin-top: clamp(44px, 6.4vw, 84px);
  padding-top: clamp(24px, 3.4vw, 40px);
  border-top: var(--sm-line-w) solid var(--sm-line);
}

.page-disclaimer .dc-block__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-disclaimer .dc-block__head .sm-label {
  justify-self: start;
}

.page-disclaimer .dc-block__title {
  margin: 0;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.24;
  color: var(--sm-bright);
}

.page-disclaimer .dc-block__intro {
  margin: 0;
  max-width: 58ch;
  color: var(--sm-body);
  line-height: 1.78;
}

.page-disclaimer .dc-anchor {
  justify-self: start;
  margin-top: 2px;
}

/* --- 条款列表 --- */
.page-disclaimer .dc-list {
  max-width: var(--dc-readw);
  border-top: var(--sm-line-w) solid var(--dc-rule);
}

.page-disclaimer .dc-item {
  border-bottom: var(--sm-line-w) solid var(--dc-rule);
}

.page-disclaimer .dc-item__head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: clamp(14px, 1.9vw, 20px) 0;
  list-style: none;
  cursor: pointer;
  color: var(--sm-bright);
  font-size: clamp(15px, 1.55vw, 17px);
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: -0.005em;
}

.page-disclaimer .dc-item__head::-webkit-details-marker {
  display: none;
}

.page-disclaimer .dc-item__head::marker {
  content: "";
}

.page-disclaimer .dc-item__head::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: 8px;
  font-family: var(--sm-font-mono);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--sm-gold);
}

.page-disclaimer .dc-item[open] > .dc-item__head::after {
  content: "–";
  color: var(--sm-gold-lift);
}

.page-disclaimer .dc-item__head:hover .dc-item__title {
  color: var(--sm-gold-lift);
}

.page-disclaimer .dc-item__num {
  flex: 0 0 auto;
  min-width: 2.9em;
  padding-top: 2px;
  font-family: var(--sm-font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--sm-gold);
}

.page-disclaimer .dc-item__title {
  flex: 1 1 auto;
  transition: color 0.18s ease;
}

.page-disclaimer .dc-item__body {
  padding: 0 0 clamp(16px, 2.1vw, 24px);
}

.page-disclaimer .dc-item__body > p {
  margin: 0;
  max-width: 62ch;
  color: var(--sm-body);
  line-height: 1.78;
}

/* --- 联系入口 --- */
.page-disclaimer .dc-contact {
  margin-top: clamp(22px, 3.2vw, 34px);
  max-width: var(--dc-readw);
  border-top: var(--sm-line-w) solid var(--dc-rule);
}

.page-disclaimer .dc-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 14px 0;
  border-bottom: var(--sm-line-w) solid var(--dc-rule);
}

.page-disclaimer .dc-contact__key {
  flex: 0 0 auto;
  min-width: 5.4em;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--sm-blue);
}

.page-disclaimer .dc-contact__val {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--sm-font-mono);
  font-size: clamp(13px, 1.5vw, 15px);
  line-height: 1.6;
  color: var(--sm-bright);
  word-break: break-all;
}

.page-disclaimer .dc-contact__val--plain {
  font-family: var(--sm-font-body);
  font-size: 14px;
  letter-spacing: 0.01em;
  color: var(--sm-body);
  word-break: normal;
}

.page-disclaimer .dc-contact__btn {
  flex: 0 0 auto;
}

/* --- 刻度式返回 --- */
.page-disclaimer .dc-back {
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: clamp(18px, 2.6vw, 28px);
  border-top: var(--sm-line-w) solid var(--sm-line);
}

.page-disclaimer .dc-back__link {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--sm-body);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: color 0.18s ease;
}

.page-disclaimer .dc-back__ticks {
  display: block;
  width: clamp(56px, 9vw, 96px);
  height: 10px;
  background: var(--dc-tick);
  transition: background 0.18s ease;
}

.page-disclaimer .dc-back__link:hover,
.page-disclaimer .dc-back__link:focus-visible {
  color: var(--sm-gold-lift);
}

.page-disclaimer .dc-back__link:hover .dc-back__ticks,
.page-disclaimer .dc-back__link:focus-visible .dc-back__ticks {
  background: var(--dc-tick-lift);
}

/* --- 窄屏 --- */
@media (max-width: 559px) {
  .page-disclaimer .dc-item__num {
    min-width: 2.4em;
    font-size: 12px;
  }

  .page-disclaimer .dc-contact__key {
    min-width: 100%;
    letter-spacing: 0.1em;
  }

  .page-disclaimer .dc-hero::before {
    width: 66%;
  }
}

/* --- 中等屏 --- */
@media (min-width: 560px) {
  .page-disclaimer {
    --dc-indent: 0px;
  }

  .page-disclaimer .dc-item__body {
    padding-left: calc(2.9em + 12px);
  }
}

/* --- 宽屏非对称布局 --- */
@media (min-width: 900px) {
  .page-disclaimer .dc-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 4.6vw, 64px);
  }

  .page-disclaimer .dc-hero__figure {
    margin-top: 6px;
  }

  .page-disclaimer .dc-block__head {
    grid-template-columns: minmax(0, 1fr);
    max-width: 62ch;
  }

  .page-disclaimer .dc-list,
  .page-disclaimer .dc-contact {
    margin-right: auto;
    max-width: min(100%, 68ch);
  }
}

@media (min-width: 1180px) {
  .page-disclaimer .dc-block__head {
    max-width: 56ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .dc-item__title,
  .page-disclaimer .dc-back__link,
  .page-disclaimer .dc-back__ticks {
    transition: none;
  }
}