.page-disclaimer {
  --chapter: var(--bamboo);
  background: var(--rice);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

/* ---------- 首屏框景 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  background: var(--bamboo-deep);
  color: var(--paper);
  padding: clamp(22px, 5vw, 46px) var(--gutter) clamp(30px, 6vw, 62px);
  overflow: hidden;
}

.page-disclaimer .usage-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(246, 241, 230, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(246, 241, 230, .07) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  right: -130px;
  bottom: -170px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  border: 1px solid rgba(246, 241, 230, .18);
  box-shadow: 0 0 0 44px rgba(246, 241, 230, .035), 0 0 0 88px rgba(246, 241, 230, .025);
  pointer-events: none;
}

.page-disclaimer .usage-frame {
  position: relative;
  z-index: 1;
  max-width: var(--shell);
  margin: 0 auto;
  border: 1px solid rgba(246, 241, 230, .32);
  border-radius: var(--radius-l);
  padding: clamp(18px, 4vw, 40px);
}

.page-disclaimer .usage-frame::before,
.page-disclaimer .usage-frame::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  height: 10px;
  background-image: repeating-linear-gradient(to right, rgba(246, 241, 230, .55) 0 1px, transparent 1px 24px);
  pointer-events: none;
}

.page-disclaimer .usage-frame::before { top: -1px; }
.page-disclaimer .usage-frame::after { bottom: -1px; }

.page-disclaimer .usage-frame__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  align-items: center;
  min-width: 0;
}

.page-disclaimer .usage-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(14px, 3vw, 24px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(246, 241, 230, .72);
}

.page-disclaimer .usage-crumb a {
  color: rgba(246, 241, 230, .84);
  text-decoration: none;
  border-bottom: 1px solid rgba(246, 241, 230, .35);
}

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

.page-disclaimer .usage-crumb__now {
  color: var(--paper);
}

.page-disclaimer .usage-hero h1 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(27px, 7.2vw, 50px);
  line-height: 1.15;
  letter-spacing: .015em;
  color: var(--paper);
}

.page-disclaimer .usage-hero__lead {
  margin: 0 0 clamp(18px, 3vw, 26px);
  max-width: 34em;
  font-size: clamp(15px, 2.6vw, 17px);
  line-height: 1.85;
  color: rgba(246, 241, 230, .86);
}

.page-disclaimer .usage-primer {
  background: var(--glass);
  border: 1px solid rgba(255, 253, 247, .55);
  border-radius: var(--radius-m);
  padding: 16px 18px;
  color: var(--bamboo-deep);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.page-disclaimer .usage-primer__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--bamboo-deep);
}

.page-disclaimer .usage-primer ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
  counter-reset: primer;
}

.page-disclaimer .usage-primer li {
  counter-increment: primer;
  position: relative;
  padding-left: 30px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--bamboo-deep);
}

.page-disclaimer .usage-primer li::before {
  content: counter(primer, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--vermilion-deep);
}

.page-disclaimer .usage-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-disclaimer .usage-hero__acts .btn--ghost {
  color: var(--paper);
  border-color: rgba(246, 241, 230, .5);
}

.page-disclaimer .usage-hero__acts .btn--ghost:hover,
.page-disclaimer .usage-hero__acts .btn--ghost:focus-visible {
  background: rgba(246, 241, 230, .14);
}

.page-disclaimer .usage-hero__media {
  margin: 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid rgba(246, 241, 230, .28);
  background: rgba(246, 241, 230, .06);
}

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

/* ---------- 正文两栏 ---------- */
.page-disclaimer .usage-body {
  padding-block: clamp(32px, 6vw, 82px);
}

.page-disclaimer .usage-grid {
  display: grid;
  gap: clamp(22px, 4vw, 38px);
  align-items: start;
  min-width: 0;
}

.page-disclaimer .usage-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--gray-deep);
}

.page-disclaimer .usage-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-disclaimer .usage-rail__list li {
  flex: 0 0 auto;
}

.page-disclaimer .usage-rail__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--gray-deep);
  font-size: 13.5px;
  text-decoration: none;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}

.page-disclaimer .usage-rail__list a:hover,
.page-disclaimer .usage-rail__list a:focus-visible {
  background: var(--bamboo);
  border-color: var(--bamboo);
  color: var(--paper);
}

.page-disclaimer .usage-rail__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--vermilion-deep);
}

.page-disclaimer .usage-rail__list a:hover .usage-rail__num,
.page-disclaimer .usage-rail__list a:focus-visible .usage-rail__num {
  color: #F6C6B2;
}

.page-disclaimer .usage-flow {
  display: grid;
  gap: clamp(22px, 4vw, 38px);
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-disclaimer .usage-chapter {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  padding: clamp(20px, 4vw, 38px);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.page-disclaimer .usage-chapter::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: var(--chapter);
}

.page-disclaimer .usage-chapter--bamboo { --chapter: var(--bamboo); }
.page-disclaimer .usage-chapter--indigo { --chapter: var(--indigo); }
.page-disclaimer .usage-chapter--wine { --chapter: var(--wine); }
.page-disclaimer .usage-chapter--vermilion { --chapter: var(--vermilion); }

.page-disclaimer .usage-chapter__tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 11px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--chapter);
}

.page-disclaimer .usage-chapter h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 4.4vw, 29px);
  line-height: 1.32;
  letter-spacing: .012em;
  color: var(--ink);
}

.page-disclaimer .usage-chapter > p {
  margin: 0 0 16px;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink);
}

.page-disclaimer .usage-list {
  list-style: none;
  margin: 0 0 8px;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-disclaimer .usage-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink);
}

.page-disclaimer .usage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 8px;
  border: 1.5px solid var(--chapter);
  border-radius: 50%;
}

.page-disclaimer .usage-list strong {
  color: var(--vermilion-deep);
  font-weight: 700;
}

/* ---------- 四段结构图 ---------- */
.page-disclaimer .usage-steps {
  display: grid;
  gap: 12px;
  margin: 18px 0 6px;
  counter-reset: step;
}

.page-disclaimer .usage-step {
  position: relative;
  counter-increment: step;
  min-width: 0;
  padding: 16px 18px 16px 48px;
  background: var(--rice);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
}

.page-disclaimer .usage-step::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--chapter);
}

.page-disclaimer .usage-step .usage-step__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--ink);
}

.page-disclaimer .usage-step .usage-step__text {
  margin: 0;
  max-width: none;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--gray-deep);
}

/* ---------- 常见误解展开 ---------- */
.page-disclaimer .usage-faq {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

.page-disclaimer .usage-faq details {
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .usage-faq summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 14px 34px 14px 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.65;
  color: var(--ink);
}

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

.page-disclaimer .usage-faq summary:hover { color: var(--vermilion-deep); }

.page-disclaimer .usage-faq summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--vermilion-deep);
}

.page-disclaimer .usage-faq details[open] summary::after { content: "−"; }

.page-disclaimer .usage-faq details p {
  margin: 0 0 16px;
  padding-right: 10px;
  max-width: 42em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--gray-deep);
}

/* ---------- 额度提醒 ---------- */
.page-disclaimer .usage-callout {
  margin: 20px 0 4px;
  padding: 16px 20px;
  background: var(--rice);
  border-left: 4px solid var(--chapter);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
}

.page-disclaimer .usage-callout .usage-callout__label {
  margin: 0 0 6px;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--chapter);
}

.page-disclaimer .usage-callout .usage-callout__text {
  margin: 0;
  max-width: 44em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 联系信息 ---------- */
.page-disclaimer .usage-reach {
  list-style: none;
  margin: 16px 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-disclaimer .usage-reach li {
  display: grid;
  gap: 3px;
  padding: 12px 16px;
  background: var(--rice);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
}

.page-disclaimer .usage-reach__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--gray-deep);
}

.page-disclaimer .usage-reach__value {
  font-family: var(--font-mono);
  font-size: 14.5px;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- 跳转链接 ---------- */
.page-disclaimer .usage-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  align-items: center;
}

.page-disclaimer .usage-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--vermilion-deep);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-disclaimer .usage-more:hover,
.page-disclaimer .usage-more:focus-visible {
  color: var(--ink);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-disclaimer .usage-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-disclaimer .usage-reach li {
    grid-template-columns: 118px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
}

@media (min-width: 900px) {
  .page-disclaimer .usage-frame__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: clamp(30px, 5vw, 56px);
  }
}

@media (min-width: 960px) {
  .page-disclaimer .usage-grid {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 68px);
  }

  .page-disclaimer .usage-rail {
    position: sticky;
    top: 92px;
  }

  .page-disclaimer .usage-rail__title {
    padding-bottom: 10px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 10px;
  }

  .page-disclaimer .usage-rail__list {
    display: grid;
    gap: 2px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-disclaimer .usage-rail__list li {
    flex: none;
  }

  .page-disclaimer .usage-rail__list a {
    display: flex;
    white-space: normal;
    padding: 10px 12px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: var(--radius-s);
    background: transparent;
    font-size: 14px;
    color: var(--ink);
  }

  .page-disclaimer .usage-rail__list a:hover,
  .page-disclaimer .usage-rail__list a:focus-visible {
    background: var(--paper);
    border-left-color: var(--vermilion);
    color: var(--ink);
  }

  .page-disclaimer .usage-rail__list a:hover .usage-rail__num,
  .page-disclaimer .usage-rail__list a:focus-visible .usage-rail__num {
    color: var(--vermilion-deep);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .usage-rail__list a,
  .page-disclaimer .usage-more {
    transition: none;
  }
}