.page-disclaimer {
  --u-line: 1px solid rgba(51, 80, 143, .6);
  --u-line-soft: 1px solid rgba(195, 201, 218, .14);
  --u-glow: radial-gradient(ellipse at 74% 0%, rgba(217, 164, 65, .16), transparent 62%);
  position: relative;
  background: linear-gradient(180deg, var(--ink-950) 0%, var(--ink-900) 30%, var(--ink-900) 100%);
  color: var(--snow-50);
  overflow-x: clip;
}

.page-disclaimer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 460px;
  background: var(--u-glow);
  pointer-events: none;
}

.page-disclaimer .usage-wrap {
  position: relative;
  z-index: 1;
  padding-top: clamp(24px, 5vw, 56px);
  padding-bottom: clamp(48px, 8vw, 104px);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  padding-bottom: clamp(32px, 5vw, 56px);
  border-bottom: var(--u-line);
}

.page-disclaimer .usage-hero__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-disclaimer .usage-hero__tag {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold-500);
  white-space: nowrap;
}

.page-disclaimer h1 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(38px, 8vw, 66px);
  line-height: 1.08;
  letter-spacing: .02em;
  color: var(--snow-50);
  margin: 0 0 14px;
}

.page-disclaimer .usage-hero__sub {
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--mist-300);
  margin: 0 0 clamp(18px, 3vw, 28px);
}

.page-disclaimer .usage-hero__lead {
  max-width: 64ch;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  letter-spacing: .01em;
  color: rgba(247, 248, 251, .86);
  margin: 0;
}

/* ---------- 面包屑 ---------- */
.page-disclaimer .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--mist-300);
}

.page-disclaimer .breadcrumb li {
  display: flex;
  align-items: center;
}

.page-disclaimer .breadcrumb li + li::before {
  content: "/";
  margin: 0 9px;
  color: var(--ink-500);
}

.page-disclaimer .breadcrumb a {
  color: var(--mist-300);
  text-decoration: none;
  transition: color .25s ease;
}

.page-disclaimer .breadcrumb a:hover {
  color: var(--gold-300);
}

.page-disclaimer .breadcrumb [aria-current="page"] {
  color: var(--gold-500);
}

/* ---------- 章节速览 ---------- */
.page-disclaimer .usage-toc {
  display: grid;
  gap: 16px;
  padding: clamp(28px, 5vw, 44px) 0 clamp(8px, 2vw, 16px);
}

.page-disclaimer .usage-toc__label {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold-500);
  margin: 0;
}

.page-disclaimer .usage-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: var(--u-line-soft);
}

.page-disclaimer .usage-toc__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 2px;
  border-bottom: var(--u-line-soft);
  color: var(--snow-50);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  transition: color .25s ease, border-color .25s ease;
}

.page-disclaimer .usage-toc__list a:hover,
.page-disclaimer .usage-toc__list a:focus-visible {
  color: var(--gold-300);
  border-bottom-color: rgba(217, 164, 65, .6);
}

.page-disclaimer .usage-toc__num {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist-300);
  font-variant-numeric: tabular-nums;
}

/* ---------- 条款章节 ---------- */
.page-disclaimer .usage-section {
  padding: clamp(30px, 5vw, 52px) 0;
  border-bottom: var(--u-line-soft);
  scroll-margin-top: 110px;
}

.page-disclaimer h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(21px, 3.2vw, 29px);
  line-height: 1.3;
  letter-spacing: .02em;
  color: var(--snow-50);
  margin: 0;
}

.page-disclaimer .usage-section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 16px;
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-disclaimer .usage-section__num {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold-500);
  font-variant-numeric: tabular-nums;
}

.page-disclaimer .usage-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: var(--u-line);
  display: grid;
  gap: 14px;
  max-width: 74ch;
}

.page-disclaimer .usage-list li {
  position: relative;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.85;
  letter-spacing: .01em;
  color: rgba(247, 248, 251, .9);
}

.page-disclaimer .usage-list li::before {
  content: "";
  position: absolute;
  left: -25.5px;
  top: .78em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold-500);
}

.page-disclaimer .usage-list a {
  color: var(--gold-300);
  text-decoration: none;
  border-bottom: 1px solid rgba(240, 206, 134, .38);
  transition: color .25s ease, border-color .25s ease;
}

.page-disclaimer .usage-list a:hover {
  color: var(--gold-500);
  border-bottom-color: var(--gold-500);
}

/* ---------- 中部五色带与横幅 ---------- */
.page-disclaimer .usage-midband {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  height: 4px;
  margin: clamp(34px, 6vw, 62px) 0 clamp(26px, 5vw, 46px);
  border-radius: 999px;
  overflow: hidden;
}

.page-disclaimer .usage-midband span {
  display: block;
  height: 100%;
}

.page-disclaimer .usage-midband span:nth-child(1) { background: var(--banner-cyan); }
.page-disclaimer .usage-midband span:nth-child(2) { background: var(--banner-white); }
.page-disclaimer .usage-midband span:nth-child(3) { background: var(--banner-red); }
.page-disclaimer .usage-midband span:nth-child(4) { background: var(--banner-green); }
.page-disclaimer .usage-midband span:nth-child(5) { background: var(--banner-yellow); }

.page-disclaimer .usage-figure {
  margin: 0 0 clamp(34px, 6vw, 62px);
}

.page-disclaimer .usage-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: inset 0 0 0 1px rgba(195, 201, 218, .18);
}

.page-disclaimer .usage-figure figcaption {
  margin-top: 14px;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: .06em;
  color: var(--mist-300);
}

/* ---------- 常用入口 ---------- */
.page-disclaimer .usage-exits {
  padding-top: clamp(36px, 6vw, 60px);
}

.page-disclaimer .usage-exits__list {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  border-top: var(--u-line);
}

.page-disclaimer .usage-exits__list a {
  position: relative;
  display: grid;
  gap: 5px;
  padding: 16px 2px 16px 22px;
  border-bottom: var(--u-line-soft);
  text-decoration: none;
  color: var(--snow-50);
  transition: color .25s ease;
}

.page-disclaimer .usage-exits__list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 10px;
  height: 1px;
  background: var(--gold-500);
  transform: translateY(-50%);
  transition: width .25s ease;
}

.page-disclaimer .usage-exits__list a:hover::before,
.page-disclaimer .usage-exits__list a:focus-visible::before {
  width: 16px;
}

.page-disclaimer .usage-exits__list span:first-child {
  font-family: var(--font-serif);
  font-size: 17.5px;
  font-weight: 700;
  letter-spacing: .02em;
  transition: color .25s ease;
}

.page-disclaimer .usage-exits__list a:hover span:first-child,
.page-disclaimer .usage-exits__list a:focus-visible span:first-child {
  color: var(--gold-300);
}

.page-disclaimer .usage-exits__hint {
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist-300);
}

/* ---------- 焦点态 ---------- */
.page-disclaimer a:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 滚动显现 ---------- */
.page-disclaimer .reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .6s ease-out, transform .6s ease-out;
}

.page-disclaimer .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-disclaimer .usage-toc__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 30px;
  }

  .page-disclaimer .usage-hero__lead {
    font-size: 17px;
  }
}

@media (min-width: 920px) {
  .page-disclaimer .usage-toc__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-disclaimer .usage-section {
    display: grid;
    grid-template-columns: minmax(0, 190px) minmax(0, 1fr);
    column-gap: 36px;
    align-items: start;
  }

  .page-disclaimer .usage-section__head {
    margin-bottom: 0;
  }

  .page-disclaimer .usage-exits__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 36px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-disclaimer .usage-exits__list a::before,
  .page-disclaimer .usage-toc__list a,
  .page-disclaimer .usage-list a {
    transition: none;
  }
}