/* ============================================================
   使用指引 / usage — 页面专属样式
   ============================================================ */

.page-disclaimer {
  --ud-aside: 236px;
  --ud-hair: rgba(157, 179, 170, .16);
  --ud-soft: rgba(242, 247, 244, .82);
  background: var(--ink-950);
  color: var(--paper);
  padding-bottom: clamp(56px, 9vw, 128px);
}

.page-disclaimer .page-top {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */

.page-disclaimer .guide-hero {
  margin-top: clamp(16px, 2.4vw, 26px);
  padding: clamp(30px, 5vw, 60px) 0 clamp(38px, 6vw, 76px);
  border-top: 1px solid var(--ud-hair);
  border-bottom: 1px solid var(--ud-hair);
  background:
    radial-gradient(120% 96% at 94% -12%, rgba(18, 224, 200, .15), transparent 62%),
    linear-gradient(174deg, var(--ink-900) 0%, var(--ink-950) 74%);
}

.page-disclaimer .guide-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
}

.page-disclaimer .guide-hero__title {
  margin: 16px 0 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.15rem, 8.2vw, 4.35rem);
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-disclaimer .guide-hero__lede {
  margin: 20px 0 0;
  max-width: 36em;
  font-size: clamp(.95rem, 1.5vw, 1.05rem);
  line-height: 1.9;
  color: var(--ud-soft);
}

.page-disclaimer .guide-hero__meta {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--ud-hair);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--muted);
}

.page-disclaimer .guide-hero__meta .num {
  color: var(--cyan);
}

.page-disclaimer .guide-figure {
  position: relative;
  margin: 0;
  padding: 8px;
  border: 1px solid rgba(18, 224, 200, .3);
  background: linear-gradient(158deg, rgba(18, 224, 200, .1), rgba(4, 20, 15, .92));
}

.page-disclaimer .guide-figure::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 78px;
  height: 78px;
  background: linear-gradient(228deg, rgba(18, 224, 200, .32), transparent 64%);
  pointer-events: none;
}

.page-disclaimer .guide-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-disclaimer .guide-figure__cap {
  padding: 10px 2px 2px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 双栏骨架 ---------- */

.page-disclaimer .guide-body {
  display: grid;
  gap: clamp(26px, 4vw, 58px);
  padding-top: clamp(36px, 5.5vw, 72px);
}

.page-disclaimer .guide-main {
  min-width: 0;
}

/* ---------- 侧栏目录 ---------- */

.page-disclaimer .guide-toc__head {
  margin: 0 0 14px;
}

.page-disclaimer .guide-toc__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.page-disclaimer .guide-toc__list::-webkit-scrollbar {
  display: none;
}

.page-disclaimer .guide-toc__item {
  flex: 0 0 auto;
}

.page-disclaimer .guide-toc__link {
  display: inline-flex;
  gap: 8px;
  align-items: baseline;
  padding: 9px 15px;
  border: 1px solid var(--ud-hair);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-disclaimer .guide-toc__link:hover,
.page-disclaimer .guide-toc__link:focus-visible {
  color: var(--cyan-soft);
  border-color: rgba(18, 224, 200, .5);
}

.page-disclaimer .guide-toc__link.is-active {
  color: var(--cyan);
  border-color: rgba(18, 224, 200, .55);
  background: rgba(18, 224, 200, .1);
}

.page-disclaimer .guide-toc__num {
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: .12em;
  opacity: .72;
}

/* ---------- 内容章节 ---------- */

.page-disclaimer .guide-sec {
  padding: clamp(30px, 4.4vw, 46px) 0;
  border-top: 1px solid var(--ud-hair);
  scroll-margin-top: 128px;
}

.page-disclaimer .guide-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-disclaimer .guide-sec__num {
  margin: 0;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-disclaimer .guide-sec__title {
  margin: 10px 0 0;
  max-width: 26ch;
  font-family: var(--font-light);
  font-weight: 300;
  font-size: clamp(1.42rem, 3.2vw, 2.1rem);
  line-height: 1.24;
  letter-spacing: -.005em;
  color: var(--paper);
}

.page-disclaimer .guide-sec__lede {
  margin: 16px 0 0;
  max-width: 38em;
  font-size: .95rem;
  line-height: 1.9;
  color: var(--ud-soft);
}

.page-disclaimer .guide-sec__foot {
  margin: 20px 0 0;
  max-width: 42em;
  font-size: .9rem;
  line-height: 1.9;
  color: var(--muted);
}

.page-disclaimer .guide-points {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-disclaimer .guide-points li {
  position: relative;
  padding: 15px 0 15px 22px;
  border-top: 1px solid var(--ud-hair);
  font-size: .94rem;
  line-height: 1.88;
  color: var(--ud-soft);
}

.page-disclaimer .guide-points li:first-child {
  border-top: 0;
  padding-top: 6px;
}

.page-disclaimer .guide-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.62em;
  width: 10px;
  height: 1px;
  background: var(--cyan);
}

.page-disclaimer .guide-points li:first-child::before {
  top: 1.12em;
}

.page-disclaimer .guide-points strong {
  color: var(--paper);
  font-weight: 600;
}

.page-disclaimer .guide-steps {
  counter-reset: ud-step;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-disclaimer .guide-steps li {
  position: relative;
  counter-increment: ud-step;
  padding: 16px 0 16px 48px;
  border-top: 1px solid var(--ud-hair);
  font-size: .94rem;
  line-height: 1.88;
  color: var(--ud-soft);
}

.page-disclaimer .guide-steps li:first-child {
  border-top: 0;
  padding-top: 6px;
}

.page-disclaimer .guide-steps li::before {
  content: counter(ud-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 17px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-disclaimer .guide-steps li:first-child::before {
  top: 7px;
}

.page-disclaimer .guide-steps__idx {
  display: block;
  margin-bottom: 2px;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--yellow);
}

/* ---------- 引用格式块 ---------- */

.page-disclaimer .cite-block {
  margin: 24px 0 0;
  border: 1px solid rgba(18, 224, 200, .3);
  background: linear-gradient(158deg, rgba(18, 224, 200, .09), rgba(4, 20, 15, .55) 62%);
}

.page-disclaimer .cite-block__head {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(18, 224, 200, .22);
}

.page-disclaimer .cite-block__code {
  margin: 0;
  padding: 16px;
  font-family: var(--font-num);
  font-size: .82rem;
  line-height: 2.05;
  color: var(--cyan-soft);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* ---------- 联系方式表 ---------- */

.page-disclaimer .guide-contact {
  margin: 22px 0 0;
  border-top: 1px solid var(--ud-hair);
}

.page-disclaimer .guide-contact__row {
  display: grid;
  gap: 4px 18px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--ud-hair);
}

.page-disclaimer .guide-contact__row .copy-btn {
  justify-self: start;
}

.page-disclaimer .guide-contact__label {
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-disclaimer .guide-contact__value {
  font-family: var(--font-num);
  font-size: .88rem;
  line-height: 1.72;
  color: var(--paper);
  overflow-wrap: anywhere;
}

/* ---------- 刻度收束图 ---------- */

.page-disclaimer .guide-scale {
  margin: clamp(38px, 6vw, 70px) 0 0;
  padding: clamp(24px, 3.5vw, 38px) clamp(18px, 3vw, 32px) clamp(18px, 2.4vw, 24px);
  border: 1px solid var(--ud-hair);
  background: linear-gradient(160deg, rgba(8, 36, 28, .92), rgba(4, 20, 15, .92));
}

.page-disclaimer .guide-scale__viewport {
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-disclaimer .guide-scale svg {
  display: block;
  width: 100%;
  min-width: 620px;
  height: auto;
}

.page-disclaimer .guide-scale__axis {
  stroke: rgba(157, 179, 170, .34);
  stroke-width: 1;
}

.page-disclaimer .guide-scale__ticks line {
  stroke: rgba(18, 224, 200, .62);
  stroke-width: 1.5;
}

.page-disclaimer .guide-scale__dots circle {
  fill: var(--cyan);
}

.page-disclaimer .guide-scale__label text {
  font-family: var(--font-body);
  font-size: 13px;
  fill: rgba(242, 247, 244, .84);
}

.page-disclaimer .guide-scale__index text {
  font-family: var(--font-num);
  font-size: 11px;
  fill: var(--cyan);
}

.page-disclaimer .guide-scale__cap {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--ud-hair);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-disclaimer .guide-contact__row {
    grid-template-columns: 96px minmax(0, 1fr) auto;
  }

  .page-disclaimer .guide-contact__row .copy-btn {
    justify-self: end;
  }
}

@media (min-width: 1024px) {
  .page-disclaimer .guide-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }

  .page-disclaimer .guide-body {
    grid-template-columns: var(--ud-aside) minmax(0, 1fr);
    align-items: start;
  }

  .page-disclaimer .guide-toc {
    position: sticky;
    top: 128px;
    max-height: calc(100vh - 156px);
    overflow-y: auto;
    padding-right: 8px;
  }

  .page-disclaimer .guide-toc__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-disclaimer .guide-toc__item {
    border-top: 1px solid var(--ud-hair);
  }

  .page-disclaimer .guide-toc__item:first-child {
    border-top: 0;
  }

  .page-disclaimer .guide-toc__link {
    display: flex;
    justify-content: flex-start;
    padding: 13px 0 13px 14px;
    border: 0;
    border-left: 2px solid rgba(157, 179, 170, .16);
    border-radius: 0;
    white-space: normal;
    line-height: 1.55;
  }

  .page-disclaimer .guide-toc__link:hover,
  .page-disclaimer .guide-toc__link:focus-visible {
    color: var(--cyan-soft);
    border-color: rgba(18, 224, 200, .16);
    border-left-color: rgba(18, 224, 200, .55);
    background: rgba(18, 224, 200, .05);
  }

  .page-disclaimer .guide-toc__link.is-active {
    color: var(--cyan);
    border-color: rgba(18, 224, 200, .16);
    border-left-color: var(--cyan);
    background: rgba(18, 224, 200, .08);
  }
}
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