.page-disclaimer {
  --pd-body: #CFD5EC;
  --pd-rule: rgba(255, 255, 255, 0.14);
  --pd-glass-bg: rgba(255, 255, 255, 0.06);
  color: var(--white);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-intro {
  padding-block: clamp(26px, 4.5vw, 44px) clamp(34px, 5.5vw, 64px);
  background:
    radial-gradient(120% 90% at 84% -12%, rgba(53, 224, 200, 0.17), transparent 58%),
    radial-gradient(90% 80% at -6% 112%, rgba(255, 138, 61, 0.13), transparent 60%);
  border-bottom: 1px solid var(--line-soft);
}

.page-disclaimer .usage-intro .breadcrumb {
  margin-bottom: clamp(22px, 3.6vw, 38px);
}

.page-disclaimer .usage-intro__label {
  display: inline-block;
  margin-bottom: 16px;
}

.page-disclaimer .usage-intro__title {
  margin: 0 0 clamp(16px, 2.4vw, 22px);
  max-width: 16ch;
  font-family: var(--font-cn);
  font-size: clamp(30px, 6vw, 60px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-disclaimer .usage-intro__lead {
  margin: 0 0 clamp(22px, 3.4vw, 34px);
  max-width: 64ch;
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.88;
  color: var(--slate);
}

.page-disclaimer .usage-intro__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-intro__meta-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--glass);
  font-size: 13px;
  color: var(--slate);
}

.page-disclaimer .usage-intro__meta-item .num {
  color: var(--cyan);
  font-weight: 700;
}

/* ---------- 章节跳转 ---------- */
.page-disclaimer .usage-jump {
  position: sticky;
  top: 56px;
  z-index: 5;
  background: rgba(11, 16, 48, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}

.page-disclaimer .usage-jump__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 10px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-disclaimer .usage-jump__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-size: 13px;
  white-space: nowrap;
  color: var(--slate);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-disclaimer .usage-jump__link:hover,
.page-disclaimer .usage-jump__link:focus-visible {
  color: var(--white);
  border-color: var(--cyan);
  background: rgba(53, 224, 200, 0.1);
}

.page-disclaimer .usage-jump__num {
  font-size: 12px;
  color: var(--cyan);
}

/* ---------- 章节通用 ---------- */
.page-disclaimer .usage-sec {
  scroll-margin-top: 130px;
  padding-block: clamp(40px, 6.2vw, 80px);
  border-bottom: 1px solid var(--line-soft);
}

.page-disclaimer .usage-sec--last {
  border-bottom: 0;
}

.page-disclaimer .usage-sec__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 20px;
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-disclaimer .usage-sec__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.6vw, 54px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-disclaimer .usage-sec__title {
  margin: 0;
  font-family: var(--font-cn);
  font-size: clamp(22px, 3.4vw, 36px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-disclaimer .usage-sec__lead {
  margin: 0 0 clamp(24px, 3.4vw, 40px);
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.88;
  color: var(--pd-body);
}

/* ---------- 01 引用 ---------- */
.page-disclaimer .usage-cite {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
  margin-bottom: clamp(24px, 3.4vw, 38px);
}

.page-disclaimer .usage-cite__text p {
  margin: 0 0 16px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--pd-body);
}

.page-disclaimer .usage-cite__figure {
  margin: 0;
  border: 1px solid var(--pd-rule);
  border-radius: var(--r-md);
  overflow: hidden;
}

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

.page-disclaimer .usage-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-fields__item {
  padding: 7px 14px;
  border: 1px solid rgba(53, 224, 200, 0.34);
  border-radius: var(--r-pill);
  background: rgba(53, 224, 200, 0.08);
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-disclaimer .usage-examples {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(24px, 3.4vw, 38px);
}

.page-disclaimer .usage-example {
  padding: 18px 20px;
  border: 1px solid var(--pd-rule);
  border-left-width: 3px;
  border-radius: var(--r-md);
  background: var(--pd-glass-bg);
}

.page-disclaimer .usage-example--ok {
  border-left-color: var(--cyan);
}

.page-disclaimer .usage-example--warn {
  border-left-color: var(--orange);
}

.page-disclaimer .usage-example__code {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--white);
  word-break: break-word;
}

.page-disclaimer .usage-example__note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--slate);
}

.page-disclaimer .usage-builder {
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--r-lg);
}

.page-disclaimer .usage-builder__head {
  margin-bottom: 18px;
}

.page-disclaimer .usage-builder__title {
  margin: 0 0 6px;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  color: var(--white);
}

.page-disclaimer .usage-builder__hint {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--slate);
}

.page-disclaimer .usage-builder__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-disclaimer .usage-builder__panel {
  padding: 16px 18px;
  border-left: 3px solid var(--cyan);
  border-radius: var(--r-sm);
  background: var(--paper);
}

.page-disclaimer .usage-builder__panel + .usage-builder__panel {
  margin-top: 10px;
}

.page-disclaimer .usage-builder__code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.78;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- 02 转载 ---------- */
.page-disclaimer .usage-steps {
  display: grid;
  gap: 14px;
  margin: 0 0 clamp(24px, 3.4vw, 38px);
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-steps__item {
  padding: 20px;
  border: 1px solid var(--pd-rule);
  border-radius: var(--r-md);
  background: var(--pd-glass-bg);
}

.page-disclaimer .usage-steps__idx {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
}

.page-disclaimer .usage-steps__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--white);
}

.page-disclaimer .usage-steps__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--pd-body);
}

.page-disclaimer .usage-split {
  display: grid;
  gap: 14px;
}

.page-disclaimer .usage-split__col {
  padding: 22px;
  border: 1px solid var(--pd-rule);
  border-top-width: 3px;
  border-radius: var(--r-md);
  background: var(--pd-glass-bg);
}

.page-disclaimer .usage-split__col--ok {
  border-top-color: var(--cyan);
}

.page-disclaimer .usage-split__col--ask {
  border-top-color: var(--orange);
}

.page-disclaimer .usage-list {
  display: grid;
  gap: 10px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--pd-body);
}

.page-disclaimer .usage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 8px;
  height: 2px;
  background: currentColor;
  opacity: 0.5;
}

.page-disclaimer .usage-split__note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--slate);
}

/* ---------- 03 导出 ---------- */
.page-disclaimer .usage-export {
  display: grid;
  gap: 16px;
}

.page-disclaimer .usage-export__card {
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--r-lg);
}

.page-disclaimer .usage-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-tags__item {
  padding: 6px 13px;
  border: 1px solid var(--paper-line);
  border-radius: var(--r-pill);
  background: rgba(26, 26, 34, 0.06);
  font-size: 13px;
  color: var(--ink);
}

.page-disclaimer .usage-export__note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: rgba(26, 26, 34, 0.72);
}

.page-disclaimer .usage-export__col {
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--pd-rule);
  border-radius: var(--r-lg);
  background: var(--pd-glass-bg);
}

.page-disclaimer .usage-export__sub {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-disclaimer .usage-export__sub + .usage-list {
  margin-bottom: 24px;
}

.page-disclaimer .usage-export__contact {
  margin: 0 0 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--slate);
}

/* ---------- 04 账号 ---------- */
.page-disclaimer .usage-account {
  display: grid;
  gap: 16px;
}

.page-disclaimer .usage-account__item {
  padding: 22px;
  border-radius: var(--r-md);
}

.page-disclaimer .usage-account__item h3 {
  margin: 0 0 10px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--white);
}

.page-disclaimer .usage-account__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--pd-body);
}

/* ---------- 05 联系方式 ---------- */
.page-disclaimer .usage-contact {
  display: grid;
  gap: 20px;
}

.page-disclaimer .usage-contact__body p {
  margin: 0 0 16px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.88;
  color: var(--pd-body);
}

.page-disclaimer .usage-contact__card {
  padding: clamp(22px, 3vw, 30px);
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, rgba(255, 138, 61, 0.18), rgba(53, 224, 200, 0.1) 78%);
  border: 1px solid rgba(255, 196, 138, 0.34);
}

.page-disclaimer .usage-contact__version {
  margin: 12px 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(34px, 4.6vw, 50px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-disclaimer .usage-contact__version-note {
  margin: 0 0 20px;
  font-size: 13.5px;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.78);
}

.page-disclaimer .usage-contact__list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-contact__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--white);
  word-break: break-word;
}

.page-disclaimer .usage-contact__list li span {
  min-width: 68px;
  font-family: var(--font-cn);
  color: var(--amber);
}

/* ---------- 底部横条 ---------- */
.page-disclaimer .usage-strip {
  padding-block: clamp(30px, 4.4vw, 50px);
  border-top: 1px solid var(--line-soft);
  background: var(--ink-800);
}

.page-disclaimer .usage-strip__inner {
  display: grid;
  gap: 16px;
}

.page-disclaimer .usage-strip__title {
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-disclaimer .usage-strip__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-strip__link {
  display: inline-block;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: 14px;
  color: var(--white);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-disclaimer .usage-strip__link:hover,
.page-disclaimer .usage-strip__link:focus-visible {
  border-color: var(--cyan);
  background: rgba(53, 224, 200, 0.09);
  color: var(--cyan);
}

/* ---------- 断点 ---------- */
@media (min-width: 780px) {
  .page-disclaimer .usage-examples {
    grid-template-columns: 1fr 1fr;
  }

  .page-disclaimer .usage-account {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-disclaimer .usage-strip__inner {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 28px;
  }
}

@media (min-width: 860px) {
  .page-disclaimer .usage-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-disclaimer .usage-split {
    grid-template-columns: 1fr 1fr;
  }

  .page-disclaimer .usage-contact {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-disclaimer .usage-cite {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-disclaimer .usage-export {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

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