/* ===== 使用协议页 · 页面专属样式 ===== */
.page-disclaimer {
  --dsc-rail-w: 164px;
  --dsc-col-gap: 52px;
  --dsc-rule: rgba(16, 16, 16, 0.12);
  --dsc-rule-strong: rgba(16, 16, 16, 0.34);
  --dsc-ink-soft: #2a2f38;
  --dsc-link: #b8431a;
}

.page-disclaimer .dsc-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 页头 ---------- */
.page-disclaimer .dsc-head {
  position: relative;
  overflow: hidden;
  padding: 34px 0 52px;
  background: linear-gradient(166deg, var(--ink-night) 0%, var(--ink) 56%, var(--ink-board) 100%);
}

.page-disclaimer .dsc-head::after {
  content: "";
  position: absolute;
  left: 44%;
  right: -14%;
  bottom: -46%;
  height: 66%;
  background: linear-gradient(100deg, rgba(255, 107, 53, 0) 0%, rgba(255, 107, 53, 0.24) 48%, rgba(255, 107, 53, 0) 100%);
  transform: skewX(-12deg);
  pointer-events: none;
}

.page-disclaimer .dsc-head > .container {
  position: relative;
  z-index: 1;
}

.page-disclaimer .dsc-head .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

.page-disclaimer .dsc-head .breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-disclaimer .dsc-head .breadcrumb a:hover,
.page-disclaimer .dsc-head .breadcrumb a:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-disclaimer .dsc-title {
  margin: 0 0 22px;
  font-family: var(--font-head);
  font-size: clamp(40px, 8vw, 68px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--text-on-dark);
}

.page-disclaimer .dsc-title::after {
  content: "";
  display: block;
  width: 74px;
  height: 6px;
  margin-top: 22px;
  background: var(--dawn);
  transform: skewX(-12deg);
}

.page-disclaimer .dsc-lead {
  max-width: 640px;
  margin: 0 0 36px;
  font-size: 17px;
  line-height: 1.78;
  color: var(--text-on-dark);
  opacity: 0.9;
}

.page-disclaimer .dsc-banner {
  margin: 0;
  border: 1px solid rgba(255, 179, 71, 0.26);
}

.page-disclaimer .dsc-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 12 / 5;
  object-fit: cover;
}

/* ---------- 条款主体 ---------- */
.page-disclaimer .dsc-clauses {
  padding: 52px 0 68px;
  background: var(--paper);
  color: var(--carbon);
}

.page-disclaimer .dsc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-disclaimer .dsc-rail {
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-disclaimer .dsc-rail-ver {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  margin: 0 0 16px;
  padding: 6px 10px;
  background: var(--ink);
  color: var(--text-on-dark);
  font-size: 11px;
  letter-spacing: 0.06em;
  border-left: 3px solid var(--dawn);
}

.page-disclaimer .dsc-rail-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin: 0;
  padding: 14px 0 0;
  list-style: none;
  border-top: 1px dashed var(--dsc-rule-strong);
}

.page-disclaimer .dsc-rail-link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 4px 0;
  color: #3c4657;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.16s var(--ease);
}

.page-disclaimer .dsc-rail-link:hover,
.page-disclaimer .dsc-rail-link:focus-visible {
  color: var(--dawn);
}

.page-disclaimer .dsc-rail-idx {
  flex: none;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--dawn);
}

.page-disclaimer .dsc-body {
  min-width: 0;
}

.page-disclaimer .dsc-clause {
  padding-bottom: 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--dsc-rule);
  scroll-margin-top: 96px;
}

.page-disclaimer .dsc-clause:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-disclaimer .dsc-clause-title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 16px;
  padding-bottom: 13px;
  font-family: var(--font-head);
  font-size: clamp(21px, 3.4vw, 27px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--carbon);
  border-bottom: 1px dashed var(--dsc-rule-strong);
}

.page-disclaimer .dsc-clause-idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--dawn);
}

.page-disclaimer .dsc-clause p {
  max-width: 74ch;
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--dsc-ink-soft);
}

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

.page-disclaimer .dsc-clause a {
  color: var(--dsc-link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.16s var(--ease);
}

.page-disclaimer .dsc-clause a:hover,
.page-disclaimer .dsc-clause a:focus-visible {
  color: var(--dawn);
}

/* ---------- 展开补充说明 ---------- */
.page-disclaimer .dsc-more {
  margin: 14px 0 4px;
  border-left: 3px solid rgba(255, 107, 53, 0.55);
  background: rgba(11, 31, 58, 0.05);
}

.page-disclaimer .dsc-more summary {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.page-disclaimer .dsc-more summary::before {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  color: var(--dawn);
}

.page-disclaimer .dsc-more[open] summary::before {
  content: "\2212";
}

.page-disclaimer .dsc-more summary:focus-visible {
  outline: 2px solid var(--dawn);
  outline-offset: 2px;
}

.page-disclaimer .dsc-more p {
  max-width: 70ch;
  margin: 0;
  padding: 0 16px 14px;
  font-size: 14.5px;
  line-height: 1.75;
  color: #40485a;
}

/* ---------- 收束带 ---------- */
.page-disclaimer .dsc-band {
  position: relative;
  padding: 34px 0;
  background: linear-gradient(96deg, var(--ink-night) 0%, var(--ink) 55%, var(--ink-board) 100%);
}

.page-disclaimer .dsc-band::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--dawn) 0%, var(--amber) 55%, var(--pitch) 100%);
}

.page-disclaimer .dsc-band-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.page-disclaimer .dsc-band-title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-on-dark);
}

.page-disclaimer .dsc-band-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}

/* ---------- 入场动效 ---------- */
.page-disclaimer .dsc-clause[data-reveal] {
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease);
}

.js-ready .page-disclaimer .dsc-clause[data-reveal]:not([data-revealed]) {
  opacity: 0;
  transform: translateY(12px);
}

/* ---------- 宽屏布局 ---------- */
@media (min-width: 880px) {
  .page-disclaimer .dsc-head {
    padding: 46px 0 64px;
  }

  .page-disclaimer .dsc-layout {
    grid-template-columns: var(--dsc-rail-w) minmax(0, 1fr);
    gap: var(--dsc-col-gap);
    align-items: start;
  }

  .page-disclaimer .dsc-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
  }

  .page-disclaimer .dsc-rail-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    padding: 16px 0 0;
  }

  .page-disclaimer .dsc-clauses {
    padding: 64px 0 84px;
  }
}

@media (min-width: 720px) {
  .page-disclaimer .dsc-band-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .dsc-clause[data-reveal],
  .page-disclaimer .dsc-rail-link,
  .page-disclaimer .dsc-clause a,
  .page-disclaimer .dsc-head .breadcrumb a {
    transition: none;
  }

  .js-ready .page-disclaimer .dsc-clause[data-reveal]:not([data-revealed]) {
    opacity: 1;
    transform: none;
  }
}
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