.page-disclaimer {
  --usage-grid: rgba(127, 211, 242, 0.13);
  --usage-hair: rgba(10, 12, 16, 0.12);
  background: var(--paper);
  color: var(--ink);
}

/* ============ 首屏 ============ */
.page-disclaimer .usage-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--space);
  color: var(--paper);
  padding-top: calc(var(--masthead-h) + clamp(30px, 6vw, 78px));
  border-bottom: 4px solid var(--ink);
}

.page-disclaimer .usage-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--usage-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--usage-grid) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(155deg, #000 0%, rgba(0, 0, 0, 0.35) 48%, transparent 78%);
  mask-image: linear-gradient(155deg, #000 0%, rgba(0, 0, 0, 0.35) 48%, transparent 78%);
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: clamp(64px, 14vw, 220px);
  height: 6px;
  background: linear-gradient(90deg, var(--ice), var(--mint));
  z-index: 2;
}

.page-disclaimer .usage-hero__inner {
  position: relative;
  z-index: 1;
  padding-bottom: clamp(26px, 4.5vw, 52px);
}

.page-disclaimer .usage-hero .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-disclaimer .usage-hero .breadcrumb__link {
  color: var(--ice);
  text-decoration: none;
}

.page-disclaimer .usage-hero .breadcrumb__link:hover {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-disclaimer .usage-hero .breadcrumb__link:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: 3px;
}

.page-disclaimer .usage-hero .breadcrumb__item {
  color: var(--silver);
}

.page-disclaimer .usage-hero .u-eyebrow {
  margin: 0 0 14px;
  color: var(--ice);
}

.page-disclaimer .usage-hero .u-eyebrow::before {
  background: var(--mint);
}

.page-disclaimer .usage-hero__title {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(44px, 11vw, 112px);
  line-height: 0.94;
  letter-spacing: -0.025em;
  color: var(--white);
}

.page-disclaimer .usage-hero__lead {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  max-width: 58ch;
  font-size: clamp(15.5px, 1.5vw, 19px);
  line-height: 1.78;
  color: var(--silver);
}

.page-disclaimer .usage-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: clamp(22px, 3.5vw, 38px) 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  line-height: 1.5;
  color: var(--silver);
}

.page-disclaimer .usage-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-left: 12px;
  border-left: 3px solid var(--ice);
}

.page-disclaimer .usage-hero__facts .u-mono {
  font-size: 15px;
  font-weight: 700;
  color: var(--mint);
}

.page-disclaimer .usage-hero__figure {
  position: relative;
  z-index: 1;
  margin: 0;
  height: clamp(150px, 24vw, 340px);
  overflow: hidden;
  border-top: 2px solid rgba(214, 222, 232, 0.24);
}

.page-disclaimer .usage-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  object-position: center 45%;
  opacity: 0.88;
}

/* ============ 正文骨架 ============ */
.page-disclaimer .usage-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  padding-top: clamp(38px, 6vw, 76px);
  padding-bottom: clamp(56px, 8vw, 104px);
}

@media (min-width: 1000px) {
  .page-disclaimer .usage-body {
    grid-template-columns: minmax(0, 248px) minmax(0, 1fr);
    gap: clamp(40px, 5.5vw, 92px);
    align-items: start;
  }
}

/* ============ 目录 ============ */
.page-disclaimer .usage-toc {
  border: var(--bw) solid var(--ink);
  background: var(--white);
  box-shadow: var(--shadow-soft);
  padding: 20px 18px;
}

.page-disclaimer .usage-toc__title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--penguin);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--penguin);
}

.page-disclaimer .usage-toc__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-disclaimer .usage-toc__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px 9px 8px;
  border-left: 3px solid transparent;
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.5;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-disclaimer .usage-toc__link .u-mono {
  flex: 0 0 auto;
  font-size: 13px;
  font-weight: 700;
  color: var(--steel);
  transition: color 0.18s var(--ease);
}

.page-disclaimer .usage-toc__link:hover {
  background: rgba(127, 211, 242, 0.16);
  border-left-color: var(--ice);
  transform: translateX(3px);
}

.page-disclaimer .usage-toc__link:hover .u-mono {
  color: var(--penguin);
}

.page-disclaimer .usage-toc__link:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: 2px;
  border-left-color: var(--penguin);
}

.page-disclaimer .usage-toc__foot {
  margin: 18px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--silver);
  font-size: 13px;
  line-height: 1.65;
  color: var(--steel);
}

.page-disclaimer .usage-toc__foot a {
  color: var(--penguin);
  text-decoration: underline;
  text-decoration-color: var(--ice);
  text-underline-offset: 3px;
}

.page-disclaimer .usage-toc__foot a:hover {
  color: var(--ice);
}

.page-disclaimer .usage-toc__foot a:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: 2px;
}

@media (min-width: 1000px) {
  .page-disclaimer .usage-toc {
    position: sticky;
    top: calc(var(--masthead-h) + 22px);
    padding: 22px 20px;
  }
}

/* ============ 条款正文 ============ */
.page-disclaimer .usage-article {
  min-width: 0;
}

.page-disclaimer .usage-rule {
  padding: clamp(26px, 4vw, 44px) 0;
  border-top: 3px solid var(--ink);
  scroll-margin-top: calc(var(--masthead-h) + 24px);
}

.page-disclaimer .usage-rule:first-of-type {
  padding-top: clamp(22px, 3.5vw, 38px);
  border-top-width: 6px;
}

.page-disclaimer .usage-rule__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 14px 18px;
  margin-bottom: 18px;
}

.page-disclaimer .usage-rule__no {
  font-family: var(--font-mono);
  font-size: clamp(34px, 6.5vw, 58px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--penguin);
}

@supports ((-webkit-text-stroke: 1px currentColor)) {
  .page-disclaimer .usage-rule__no {
    color: transparent;
    -webkit-text-stroke: 1.7px var(--penguin);
  }
}

.page-disclaimer .usage-rule__title {
  margin: 0;
  min-width: 0;
  font-family: var(--font-title);
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 900;
  line-height: 1.25;
  color: var(--ink);
}

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

.page-disclaimer .usage-rule__body p {
  margin: 0;
  max-width: 70ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink);
}

.page-disclaimer .usage-list {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  max-width: 70ch;
  list-style: none;
}

.page-disclaimer .usage-list li {
  position: relative;
  padding-left: 24px;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--ink);
}

.page-disclaimer .usage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.76em;
  width: 12px;
  height: 2px;
  background: var(--ice);
}

.page-disclaimer .usage-note {
  margin-top: 4px;
  padding: 14px 16px;
  border-left: 4px solid var(--orange);
  background: rgba(255, 138, 61, 0.08);
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink);
}

.page-disclaimer .usage-mail {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--penguin);
  text-decoration: underline;
  text-decoration-color: var(--ice);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  word-break: break-all;
}

.page-disclaimer .usage-mail:hover {
  color: var(--ice);
  background: rgba(127, 211, 242, 0.14);
}

.page-disclaimer .usage-mail:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: 2px;
}

.page-disclaimer .usage-inline-link {
  color: var(--penguin);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--ice);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-disclaimer .usage-inline-link:hover {
  color: var(--ice);
}

.page-disclaimer .usage-inline-link:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: 2px;
}

/* ============ 底部延伸 ============ */
.page-disclaimer .usage-foot {
  margin-top: clamp(30px, 5vw, 54px);
  padding: 22px 20px 24px;
  border: var(--bw) solid var(--ink);
  background: var(--space);
  box-shadow: var(--shadow-hard);
  display: grid;
  gap: 14px;
}

.page-disclaimer .usage-foot__title {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--white);
}

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

.page-disclaimer .usage-foot__links .btn {
  text-decoration: none;
}

@media (min-width: 1000px) {
  .page-disclaimer .usage-rule__body p,
  .page-disclaimer .usage-list li {
    font-size: 17.5px;
  }
}