.page-disclaimer {
  --u-cut: 2px 16px 2px 16px;
  --u-cut-sm: 2px 10px 2px 10px;
  background: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  --hero-cut: 26px;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: linear-gradient(158deg, var(--ink) 0%, var(--navy) 64%, #142c50 100%);
  color: var(--paper);
  padding: calc(var(--header-h) + 38px) 0 calc(50px + var(--hero-cut));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--hero-cut)), 0 100%);
}

.page-disclaimer .usage-hero__stripes {
  position: absolute;
  top: -12%;
  right: -14%;
  width: 64%;
  height: 128%;
  background: repeating-linear-gradient(90deg, rgba(215, 25, 45, .55) 0 14px, transparent 14px 38px);
  transform: skewX(-14deg);
  opacity: .42;
  z-index: -1;
  pointer-events: none;
}

.page-disclaimer .usage-hero__inner {
  position: relative;
  z-index: 1;
}

.page-disclaimer .usage-hero .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .78rem;
  color: rgba(247, 245, 242, .58);
  margin-bottom: 18px;
}

.page-disclaimer .usage-hero .breadcrumb a {
  color: rgba(247, 245, 242, .74);
  text-decoration: none;
}

.page-disclaimer .usage-hero .breadcrumb a:hover {
  color: var(--white);
}

.page-disclaimer .usage-hero .breadcrumb [aria-current="page"] {
  color: var(--cream);
}

.page-disclaimer .usage-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.8rem, 6.4vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--white);
  margin: 0 0 16px;
  max-width: 20ch;
  text-wrap: balance;
}

.page-disclaimer .usage-hero__lead {
  font-size: clamp(.94rem, 2.4vw, 1.05rem);
  line-height: 1.85;
  color: rgba(247, 245, 242, .82);
  max-width: 62ch;
  margin: 0 0 30px;
}

.page-disclaimer .usage-metrics {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(247, 245, 242, .18);
  border: 1px solid rgba(247, 245, 242, .18);
  border-radius: 2px 16px 2px 16px;
  overflow: hidden;
  max-width: 720px;
}

.page-disclaimer .usage-metrics li {
  background: rgba(6, 16, 31, .58);
  padding: 14px 16px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  min-width: 0;
}

.page-disclaimer .usage-metrics__num {
  font-size: 1.7rem;
  line-height: 1;
  font-weight: 600;
  letter-spacing: -.03em;
  color: var(--white);
}

.page-disclaimer .usage-metrics__label {
  font-family: var(--font-serif);
  font-size: .76rem;
  color: rgba(247, 245, 242, .66);
}

/* ---------- 主体布局 ---------- */
.page-disclaimer .usage-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding-top: 34px;
  padding-bottom: 56px;
}

/* ---------- 左侧步骤导航 ---------- */
.page-disclaimer .usage-rail {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  margin-inline: -16px;
  padding: 10px 16px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-disclaimer .usage-rail::-webkit-scrollbar {
  display: none;
}

.page-disclaimer .usage-rail__title {
  display: none;
}

.page-disclaimer .usage-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  position: relative;
}

.page-disclaimer .usage-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 7px 12px 7px 8px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--u-cut-sm);
  color: var(--navy);
  font-size: .82rem;
  text-decoration: none;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-disclaimer .usage-rail__num {
  display: inline-grid;
  place-items: center;
  width: 24px;
  height: 24px;
  font-size: .7rem;
  color: var(--red);
  background: rgba(215, 25, 45, .08);
  border-radius: 2px 8px 2px 8px;
  transition: background .2s var(--ease), color .2s var(--ease);
}

.page-disclaimer .usage-rail__list a:hover,
.page-disclaimer .usage-rail__list a:focus-visible {
  border-color: var(--red);
  outline: none;
}

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

/* ---------- 条款卡 ---------- */
.page-disclaimer .u-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 2px 18px 2px 18px;
  padding: 24px 20px 24px 26px;
  margin-bottom: 20px;
  box-shadow: 0 12px 26px rgba(6, 16, 31, .06);
  overflow: hidden;
  scroll-margin-top: calc(var(--header-h) + 70px);
}

.page-disclaimer .u-card:last-child {
  margin-bottom: 0;
}

.page-disclaimer .u-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: repeating-linear-gradient(180deg, var(--red) 0 12px, var(--white) 12px 24px);
  opacity: .9;
}

.page-disclaimer .u-card__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .u-card__num {
  font-size: 1.7rem;
  line-height: .9;
  font-weight: 600;
  letter-spacing: -.05em;
  color: var(--red);
  flex: 0 0 auto;
}

.page-disclaimer .u-card h2 {
  font-family: var(--font-display);
  font-size: 1.24rem;
  font-weight: 800;
  line-height: 1.28;
  margin: 0;
  color: var(--navy);
}

.page-disclaimer .u-card p {
  margin: 0 0 12px;
  font-size: .93rem;
  line-height: 1.8;
  color: var(--ink);
  overflow-wrap: break-word;
}

.page-disclaimer .u-card p:last-child {
  margin-bottom: 0;
}

.page-disclaimer .u-card a {
  color: var(--red-dark);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(215, 25, 45, .35);
}

.page-disclaimer .u-card a:hover {
  color: var(--red);
  border-bottom-color: var(--red);
}

/* 使用边界清单 */
.page-disclaimer .u-rules {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-disclaimer .u-rules li {
  position: relative;
  padding-left: 26px;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--ink);
}

.page-disclaimer .u-rules li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .55em;
  width: 10px;
  height: 10px;
  border-radius: 1px 4px 1px 4px;
  background: var(--green);
}

.page-disclaimer .u-rules--no li::before {
  background: var(--red);
  transform: rotate(45deg);
}

/* 导出步骤 */
.page-disclaimer .u-steps {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-disclaimer .u-steps li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-disclaimer .u-steps__idx {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  font-size: .95rem;
  font-weight: 600;
  color: var(--white);
  background: var(--navy);
  border-radius: 2px 12px 2px 12px;
}

.page-disclaimer .u-steps li:last-child .u-steps__idx {
  background: var(--red);
}

.page-disclaimer .u-steps__title {
  font-weight: 700;
  font-size: .94rem;
  color: var(--navy);
  margin: 0 0 4px;
}

.page-disclaimer .u-steps p {
  margin: 0;
  font-size: .9rem;
}

.page-disclaimer .u-steps li > div > p.u-steps__title {
  margin: 0 0 4px;
  line-height: 1.6;
}

/* 图 */
.page-disclaimer .u-figure {
  margin: 0 0 20px;
}

.page-disclaimer .u-figure .media {
  border-radius: 2px 16px 2px 16px;
  overflow: hidden;
}

.page-disclaimer .u-figure .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-disclaimer .u-figure .media-caption {
  margin-top: 8px;
  font-family: var(--font-serif);
  font-size: .78rem;
  line-height: 1.7;
  color: var(--gray);
}

/* 格式说明两栏 */
.page-disclaimer .u-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 0 0 20px;
}

.page-disclaimer .u-note {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 2px 12px 2px 12px;
  padding: 14px 16px;
}

.page-disclaimer .u-note p {
  margin: 0;
  font-size: .87rem;
  line-height: 1.72;
}

.page-disclaimer .u-note p.u-note__label {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--red);
}

/* 折叠问答 */
.page-disclaimer .u-details {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 2px 12px 2px 12px;
  padding: 0 16px;
  margin-bottom: 10px;
}

.page-disclaimer .u-details:last-child {
  margin-bottom: 0;
}

.page-disclaimer .u-details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  padding: 13px 0;
  font-size: .9rem;
  font-weight: 700;
  color: var(--navy);
}

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

.page-disclaimer .u-details summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--red);
}

.page-disclaimer .u-details[open] summary::after {
  content: "–";
}

.page-disclaimer .u-details p {
  margin: 0 0 14px;
  font-size: .88rem;
  line-height: 1.75;
}

/* 阶段标签 */
.page-disclaimer .u-tags {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-disclaimer .u-tags li {
  padding: 5px 13px;
  font-family: var(--font-serif);
  font-size: .78rem;
  color: var(--navy);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--u-cut-sm);
}

/* 深色联系卡 */
.page-disclaimer .u-card--navy {
  background: var(--navy);
  border-color: rgba(247, 245, 242, .12);
  color: var(--paper);
}

.page-disclaimer .u-card--navy::before {
  opacity: .45;
}

.page-disclaimer .u-card--navy .u-card__head {
  border-bottom-color: rgba(247, 245, 242, .16);
}

.page-disclaimer .u-card--navy h2 {
  color: var(--white);
}

.page-disclaimer .u-card--navy p {
  color: rgba(247, 245, 242, .8);
}

.page-disclaimer .u-card--navy a {
  color: var(--cream);
  border-bottom-color: rgba(255, 244, 242, .45);
}

.page-disclaimer .u-card--navy a:hover {
  color: var(--white);
  border-bottom-color: var(--white);
}

.page-disclaimer .u-contact {
  list-style: none;
  margin: 4px 0 16px;
  padding: 1px;
  display: grid;
  gap: 1px;
  background: rgba(247, 245, 242, .16);
  border-radius: 2px 14px 2px 14px;
  overflow: hidden;
}

.page-disclaimer .u-contact li {
  background: var(--navy);
  padding: 11px 15px;
  display: grid;
  gap: 3px;
  min-width: 0;
}

.page-disclaimer .u-contact__key {
  font-family: var(--font-serif);
  font-size: .72rem;
  letter-spacing: .08em;
  color: rgba(247, 245, 242, .58);
}

.page-disclaimer .u-contact__val {
  font-size: .93rem;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-disclaimer .u-card p.u-card__foot {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid rgba(247, 245, 242, .16);
  font-size: .8rem;
  line-height: 1.75;
  color: rgba(247, 245, 242, .6);
}

/* ---------- 收尾 ---------- */
.page-disclaimer .usage-foot {
  padding-bottom: 64px;
}

.page-disclaimer .u-band {
  height: 8px;
  border-radius: 2px;
  background: repeating-linear-gradient(90deg, var(--red) 0 14px, var(--white) 14px 30px);
  opacity: .85;
  margin-bottom: 18px;
}

.page-disclaimer .usage-foot__note {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-disclaimer .usage-top {
  display: inline-flex;
  align-items: center;
  margin-top: 16px;
  padding: 10px 22px;
  font-size: .84rem;
  font-weight: 700;
  color: var(--white);
  background: var(--navy);
  border-radius: var(--u-cut);
  text-decoration: none;
  transition: background .2s var(--ease), transform .2s var(--ease);
}

.page-disclaimer .usage-top:hover {
  background: var(--red);
  transform: translateY(-1px);
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-disclaimer .usage-hero {
    --hero-cut: 38px;
    padding: calc(var(--header-h) + 52px) 0 calc(64px + var(--hero-cut));
  }

  .page-disclaimer .usage-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-disclaimer .usage-body {
    padding-top: 46px;
    gap: 26px;
  }

  .page-disclaimer .u-card {
    padding: 30px 28px 30px 34px;
    margin-bottom: 24px;
  }

  .page-disclaimer .u-card h2 {
    font-size: 1.42rem;
  }

  .page-disclaimer .u-card p {
    font-size: .96rem;
  }

  .page-disclaimer .u-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-disclaimer .u-steps {
    gap: 18px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-disclaimer .usage-hero {
    --hero-cut: 48px;
    padding: calc(var(--header-h) + 68px) 0 calc(80px + var(--hero-cut));
  }

  .page-disclaimer .usage-hero__stripes {
    width: 48%;
    opacity: .5;
  }

  .page-disclaimer .usage-body {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 48px;
    padding-top: 56px;
    padding-bottom: 72px;
    align-items: start;
  }

  .page-disclaimer .usage-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    margin-inline: 0;
    padding: 0;
    background: transparent;
    border-bottom: none;
    overflow: visible;
  }

  .page-disclaimer .usage-rail__title {
    display: block;
    margin: 0 0 14px;
    font-family: var(--font-serif);
    font-size: .74rem;
    letter-spacing: .14em;
    color: var(--gray);
  }

  .page-disclaimer .usage-rail__list {
    display: grid;
    gap: 6px;
    padding-left: 4px;
  }

  .page-disclaimer .usage-rail__list::before {
    content: "";
    position: absolute;
    left: 19px;
    top: 14px;
    bottom: 14px;
    width: 2px;
    background: linear-gradient(180deg, var(--red), var(--line));
  }

  .page-disclaimer .usage-rail__list a {
    position: relative;
    padding: 6px 8px 6px 0;
    background: transparent;
    border: none;
    border-radius: 0;
    font-size: .88rem;
    gap: 14px;
    color: var(--navy);
  }

  .page-disclaimer .usage-rail__num {
    width: 32px;
    height: 32px;
    flex: 0 0 32px;
    font-size: .74rem;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 2px 10px 2px 10px;
    position: relative;
    z-index: 1;
  }

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

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

  .page-disclaimer .u-card {
    padding: 34px 36px 34px 42px;
  }

  .page-disclaimer .u-card__num {
    font-size: 2rem;
  }

  .page-disclaimer .u-card h2 {
    font-size: 1.58rem;
  }

  .page-disclaimer .u-steps li {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 18px;
  }

  .page-disclaimer .u-steps__idx {
    width: 46px;
    height: 46px;
    font-size: 1rem;
  }

  .page-disclaimer .usage-foot {
    padding-bottom: 88px;
  }
}

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

  .page-disclaimer .usage-top:hover {
    transform: none;
  }
}