.page-disclaimer{
  --usage-rail:200px;
  --usage-note:180px;
  --usage-gap:clamp(24px,4vw,56px);
  position:relative;
  overflow-x:clip;
  background:
    radial-gradient(120% 55% at 100% 0, rgba(36,28,66,.6) 0%, rgba(10,29,25,0) 58%),
    var(--deep);
  color:var(--body-text);
  font-family:var(--font-body);
  padding-bottom:clamp(56px,9vw,120px);
}

.page-disclaimer a:focus-visible,
.page-disclaimer button:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
}

/* 面包屑 */
.page-disclaimer .breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:clamp(72px,9vw,100px) 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--mist);
}
.page-disclaimer .breadcrumb a{
  color:var(--mist);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease), border-color .18s var(--ease);
}
.page-disclaimer .breadcrumb a:hover{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
}
.page-disclaimer .breadcrumb__sep{color:var(--copper);}

/* 首屏 */
.page-disclaimer .usage-hero{
  padding:clamp(22px,3.5vw,36px) 0 clamp(34px,5vw,60px);
  border-bottom:1px solid var(--line);
}
.page-disclaimer .usage-hero__grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(24px,4vw,48px);
  align-items:end;
}
.page-disclaimer .usage-hero__lead{min-width:0;}
.page-disclaimer .eyebrow{
  display:inline-block;
  position:relative;
  margin:0 0 16px;
  padding-left:26px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--copper);
}
.page-disclaimer .eyebrow::before{
  content:"";
  position:absolute;
  left:0;
  top:.62em;
  width:18px;
  height:1px;
  background:var(--copper);
}
.page-disclaimer h1{
  margin:0 0 20px;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(2.1rem,5.4vw,3.5rem);
  line-height:1.08;
  letter-spacing:-.01em;
  color:var(--paper);
}
.page-disclaimer .usage-hero__intro{
  margin:0 0 24px;
  max-width:60ch;
  font-size:clamp(1rem,1.6vw,1.075rem);
  line-height:1.85;
  color:var(--body-text);
}
.page-disclaimer .usage-hero__meta{
  display:flex;
  flex-wrap:wrap;
  gap:8px 22px;
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--mist);
}
.page-disclaimer .usage-hero__meta span::before{
  content:"—";
  margin-right:8px;
  color:var(--copper);
}
.page-disclaimer .usage-hero__media{
  width:100%;
  max-width:520px;
  margin:0;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--carbon);
  box-shadow:6px 6px 0 rgba(42,59,54,.55);
}
.page-disclaimer .usage-hero__media img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.page-disclaimer .media__tag{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--copper);
}
.page-disclaimer .media__caption{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--mist);
}

/* 正文骨架 */
.page-disclaimer .usage-body{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:var(--usage-gap);
  padding-top:clamp(32px,5vw,64px);
}

/* 条款索引 */
.page-disclaimer .usage-rail{min-width:0;}
.page-disclaimer .usage-rail__title{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--copper);
}
.page-disclaimer .usage-rail__list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:4px;
}
.page-disclaimer .usage-rail__link{
  display:block;
  padding:7px 10px;
  font-size:13px;
  line-height:1.4;
  color:var(--mist);
  text-decoration:none;
  border-left:2px solid transparent;
  transition:color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}
.page-disclaimer .usage-rail__link:hover{
  color:var(--paper);
  background:rgba(61,242,210,.07);
}
.page-disclaimer .usage-rail__link[aria-current="true"]{
  color:var(--cyan);
  border-left-color:var(--cyan);
  background:rgba(61,242,210,.08);
}
.page-disclaimer .usage-rail__top{
  display:inline-block;
  margin-top:18px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--mist);
  text-decoration:none;
  transition:color .18s var(--ease);
}
.page-disclaimer .usage-rail__top:hover{color:var(--cyan);}

/* 条款 */
.page-disclaimer .usage-doc{min-width:0;}
.page-disclaimer .usage-clause{
  padding:clamp(28px,4vw,46px) 0;
  border-top:1px solid var(--line);
}
.page-disclaimer .usage-clause:first-child{
  border-top:0;
  padding-top:0;
}
.page-disclaimer .usage-clause__head{
  display:flex;
  align-items:baseline;
  gap:14px;
  margin-bottom:18px;
}
.page-disclaimer .usage-clause__num{
  flex:none;
  padding:2px 8px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.1em;
  color:var(--copper);
  border:1px solid var(--copper);
  border-radius:var(--radius);
}
.page-disclaimer .usage-clause h2{
  margin:0;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.3rem,2.6vw,1.8rem);
  line-height:1.25;
  letter-spacing:.01em;
  color:var(--paper);
}
.page-disclaimer .usage-clause__body{
  min-width:0;
  font-size:1rem;
  line-height:1.85;
}
.page-disclaimer .usage-clause__body p{
  margin:0 0 16px;
  max-width:66ch;
}
.page-disclaimer .usage-clause__body p:last-child{margin-bottom:0;}
.page-disclaimer .usage-clause__body ul{
  list-style:none;
  margin:0 0 16px;
  padding:0;
  max-width:66ch;
  display:grid;
  gap:10px;
}
.page-disclaimer .usage-clause__body li{
  position:relative;
  padding-left:20px;
  line-height:1.8;
}
.page-disclaimer .usage-clause__body li::before{
  content:"";
  position:absolute;
  left:0;
  top:.78em;
  width:9px;
  height:1px;
  background:var(--copper);
}
.page-disclaimer .usage-clause__body a{
  color:var(--cyan);
  text-decoration:none;
  border-bottom:1px solid var(--line);
  transition:border-color .18s var(--ease);
}
.page-disclaimer .usage-clause__body a:hover{border-bottom-color:var(--cyan);}
.page-disclaimer .usage-clause__note{
  margin:18px 0 0;
  padding-left:12px;
  border-left:1px solid var(--copper);
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.7;
  letter-spacing:.05em;
  color:var(--mist);
}
.page-disclaimer .usage-clause__note--alert{
  border-left-color:var(--orange);
  color:var(--orange);
}

/* 按钮与复制 */
.page-disclaimer .usage-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin:22px 0 0;
}
.page-disclaimer .usage-mail{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  margin-top:18px;
}
.page-disclaimer .usage-mail__addr{
  font-family:var(--font-mono);
  font-size:14px;
  letter-spacing:.02em;
  color:var(--paper);
  word-break:break-all;
}
.page-disclaimer .usage-copy{
  padding:9px 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--paper);
  background:var(--slate);
  border:1px solid var(--line);
  border-radius:var(--radius);
  cursor:pointer;
  transition:border-color .18s var(--ease), color .18s var(--ease);
}
.page-disclaimer .usage-copy:hover{border-color:var(--cyan);color:var(--cyan);}
.page-disclaimer .usage-copy.is-copied{border-color:var(--cyan);color:var(--cyan);}

/* 平板与桌面 */
@media (min-width:900px){
  .page-disclaimer .usage-hero__grid{
    grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);
  }
  .page-disclaimer .usage-hero__media{justify-self:end;}
}

@media (min-width:960px){
  .page-disclaimer .usage-body{
    grid-template-columns:var(--usage-rail) minmax(0,1fr);
  }
  .page-disclaimer .usage-rail{
    position:sticky;
    top:calc(var(--bar-h) + 24px);
    align-self:start;
    max-height:calc(100vh - var(--bar-h) - 48px);
    overflow:auto;
    padding-right:10px;
    border-right:1px solid var(--line-soft);
  }
  .page-disclaimer .usage-rail__list{
    flex-direction:column;
    flex-wrap:nowrap;
    gap:2px;
  }
}

@media (min-width:1120px){
  .page-disclaimer .usage-clause{
    display:grid;
    grid-template-columns:minmax(0,1fr) var(--usage-note);
    column-gap:clamp(24px,3vw,48px);
  }
  .page-disclaimer .usage-clause__head{grid-column:1 / -1;}
  .page-disclaimer .usage-clause__body{grid-column:1;}
  .page-disclaimer .usage-clause__note{
    grid-column:2;
    grid-row:2;
    margin:4px 0 0;
    position:sticky;
    top:calc(var(--bar-h) + 32px);
    align-self:start;
  }
  .page-disclaimer .usage-actions{grid-column:1 / -1;}
}

@media (max-width:600px){
  .page-disclaimer .usage-clause__head{
    flex-wrap:wrap;
    gap:10px;
  }
  .page-disclaimer .usage-hero__media{
    max-width:none;
    box-shadow:4px 4px 0 rgba(42,59,54,.55);
  }
}

@media (prefers-reduced-motion:reduce){
  .page-disclaimer .usage-rail__link,
  .page-disclaimer .usage-copy,
  .page-disclaimer .breadcrumb a,
  .page-disclaimer .usage-clause__body a{
    transition:none;
  }
}