/* ============================================================
   使用说明页 · page-disclaimer
   条款卡片式阅读：左侧章节轴 + 右侧粗边框条款块
   ============================================================ */

.page-disclaimer {
  --dc-toc-w: 236px;
  --dc-pad: clamp(1.25rem, 3vw, 2.25rem);
  background: var(--sand);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.7;
}

.page-disclaimer h1,
.page-disclaimer h2 {
  font-family: var(--font-sans);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0;
}

/* ---------- 首屏 ---------- */

.page-disclaimer .dc-hero {
  position: relative;
  padding: clamp(1.4rem, 4vw, 2.75rem) 0 clamp(2rem, 5vw, 3.25rem);
  border-bottom: var(--line) solid var(--ink);
  background:
    radial-gradient(62% 84% at 94% -12%, rgba(111, 183, 201, 0.32), transparent 62%),
    radial-gradient(46% 70% at 2% 110%, rgba(200, 155, 60, 0.30), transparent 66%),
    var(--sand);
  overflow: hidden;
}

.page-disclaimer .dc-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(28, 27, 25, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(28, 27, 25, 0.06) 1px, transparent 1px);
  background-size: 52px 52px;
  pointer-events: none;
}

.page-disclaimer .dc-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-disclaimer .crumbs {
  margin-bottom: clamp(1.1rem, 3vw, 1.9rem);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: 0.04em;
}

.page-disclaimer .dc-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: end;
}

.page-disclaimer .eyebrow {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.3rem 0.7rem;
  font-family: var(--font-mono);
  font-size: var(--fs-tag);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--gold);
  border: 2px solid var(--ink);
}

.page-disclaimer h1 {
  max-width: 16ch;
  margin: 0 0 1rem;
  font-size: clamp(2rem, 6vw, 4.1rem);
}

.page-disclaimer .dc-hero__intro {
  max-width: 60ch;
  margin: 0 0 1.6rem;
  font-size: clamp(1rem, 1.3vw, 1.16rem);
  line-height: 1.78;
}

.page-disclaimer .dc-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-disclaimer .dc-hero__media {
  margin: 0;
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-hard);
  background: var(--sand-deep);
  overflow: hidden;
}

.page-disclaimer .dc-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.06);
}

.page-disclaimer .dc-hero__media .media__caption {
  padding: 0.6rem 0.85rem;
  border-top: var(--line) solid var(--ink);
  background: var(--warm);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--ink);
}

/* ---------- 主体：章节轴 + 条款 ---------- */

.page-disclaimer .dc-body {
  padding: clamp(2rem, 5vw, 3.5rem) 0 clamp(2.5rem, 6vw, 4.5rem);
}

.page-disclaimer .dc-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: start;
}

.page-disclaimer .dc-toc {
  padding: 1.1rem 1.15rem 1.25rem;
  border: var(--line) solid var(--ink);
  background: var(--warm);
  box-shadow: var(--shadow-hard-sm);
}

.page-disclaimer .dc-toc__title {
  margin: 0 0 0.85rem;
  padding-bottom: 0.55rem;
  border-bottom: 2px solid var(--ink);
  font-family: var(--font-mono);
  font-size: var(--fs-tag);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--glacier-deep);
}

.page-disclaimer .dc-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-disclaimer .dc-toc__item + .dc-toc__item {
  border-top: 1px solid var(--sand-deep);
}

.page-disclaimer .dc-toc__link {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  padding: 0.62rem 0.35rem 0.62rem 0.6rem;
  border-left: 4px solid transparent;
  color: var(--ink);
  font-size: 0.95rem;
  text-decoration: none;
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-disclaimer .dc-toc__link:hover,
.page-disclaimer .dc-toc__link:focus-visible {
  border-left-color: var(--gold);
  background: var(--sand);
  color: var(--glacier-deep);
}

.page-disclaimer .dc-toc__idx {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-disclaimer .dc-toc__top {
  display: inline-block;
  margin-top: 1rem;
  padding-bottom: 0.15rem;
  border-bottom: 2px solid var(--glacier);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--glacier-deep);
  text-decoration: none;
}

.page-disclaimer .dc-toc__top:hover {
  border-bottom-color: var(--flare);
  color: var(--ink);
}

/* ---------- 条款卡片 ---------- */

.page-disclaimer .dc-clause {
  position: relative;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
  padding: var(--dc-pad);
  padding-left: calc(var(--dc-pad) + 0.5rem);
  border: var(--line) solid var(--ink);
  background: var(--warm);
  box-shadow: var(--shadow-hard);
  scroll-margin-top: calc(var(--bar-h) + 1rem);
}

.page-disclaimer .dc-clause:last-child {
  margin-bottom: 0;
}

.page-disclaimer .dc-clause::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--glacier) 100%);
}

.page-disclaimer .dc-clause__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.85rem;
  margin-bottom: 1.15rem;
  padding-bottom: 0.85rem;
  border-bottom: var(--line) solid var(--ink);
}

.page-disclaimer .dc-clause__num {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.55rem, 4vw, 2.4rem);
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--gold);
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .page-disclaimer .dc-clause__num {
    background-image: linear-gradient(140deg, var(--gold) 8%, var(--flare) 92%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }
}

.page-disclaimer .dc-clause__head h2 {
  font-size: clamp(1.25rem, 2.6vw, 1.85rem);
}

.page-disclaimer .dc-clause__body > p {
  max-width: 68ch;
  margin: 0 0 1.1rem;
}

.page-disclaimer .dc-clause__body > p:last-child {
  margin-bottom: 0;
}

/* 列表 */

.page-disclaimer .dc-list {
  list-style: none;
  max-width: 68ch;
  margin: 0 0 1.15rem;
  padding: 0;
}

.page-disclaimer .dc-list li {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.65rem 0;
  border-bottom: 1px dashed var(--sand-deep);
  font-size: 0.97rem;
}

.page-disclaimer .dc-list li:first-child {
  border-top: 1px dashed var(--sand-deep);
}

.page-disclaimer .dc-list li::before {
  content: "";
  width: 10px;
  height: 10px;
  margin-top: 0.55rem;
  background: var(--glacier);
  border: 2px solid var(--ink);
}

/* 提示块 */

.page-disclaimer .dc-note {
  max-width: 68ch;
  margin: 1.25rem 0 0;
  padding: 0.9rem 1.05rem;
  border: var(--line) solid var(--ink);
  border-left-width: 8px;
  border-left-color: var(--flare);
  background: var(--sand);
  font-size: 0.95rem;
}

/* 联系信息深色块 */

.page-disclaimer .dc-contact {
  margin: 0 0 1.25rem;
  padding: clamp(1rem, 2.5vw, 1.5rem);
  border: var(--line) solid var(--ink);
  background: var(--night);
  color: var(--warm);
  box-shadow: var(--shadow-hard-sm);
}

.page-disclaimer .dc-contact__facts {
  margin: 0;
}

.page-disclaimer .dc-contact__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.15rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(247, 244, 239, 0.18);
}

.page-disclaimer .dc-contact__row:first-child {
  padding-top: 0;
}

.page-disclaimer .dc-contact__row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-disclaimer .dc-contact dt {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-disclaimer .dc-contact dd {
  margin: 0;
  font-size: 1rem;
  color: var(--warm);
  overflow-wrap: anywhere;
}

.page-disclaimer .dc-clause__tail {
  margin: 1.25rem 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--glacier-deep);
}

.page-disclaimer .dc-clause__tail a {
  color: var(--glacier-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--glacier);
}

.page-disclaimer .dc-clause__tail a:hover,
.page-disclaimer .dc-clause__tail a:focus-visible {
  border-bottom-color: var(--flare);
  color: var(--ink);
}

/* ---------- 尾部引导 ---------- */

.page-disclaimer .dc-tail {
  border-top: var(--line) solid var(--ink);
  background:
    radial-gradient(70% 120% at 12% 0%, rgba(200, 155, 60, 0.18), transparent 62%),
    radial-gradient(60% 120% at 100% 100%, rgba(111, 183, 201, 0.20), transparent 60%),
    var(--night);
  color: var(--warm);
}

.page-disclaimer .dc-tail__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  align-items: center;
}

.page-disclaimer .dc-tail__eyebrow {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: var(--fs-tag);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--glacier);
}

.page-disclaimer .dc-tail h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.35rem, 3vw, 2.05rem);
  color: var(--warm);
}

.page-disclaimer .dc-tail__copy p:last-child {
  max-width: 62ch;
  margin: 0;
  color: rgba(247, 244, 239, 0.82);
}

.page-disclaimer .dc-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-disclaimer .dc-contact__row {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 1rem;
    align-items: baseline;
  }
}

@media (min-width: 720px) {
  .page-disclaimer .dc-tail__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 2rem;
  }

  .page-disclaimer .dc-tail__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 980px) {
  .page-disclaimer .dc-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 3.5rem);
  }

  .page-disclaimer .dc-body__grid {
    grid-template-columns: var(--dc-toc-w) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-disclaimer .dc-toc {
    position: sticky;
    top: 2rem;
  }

  .page-disclaimer .dc-contact__row {
    grid-template-columns: 132px minmax(0, 1fr);
  }
}

@media (min-width: 1280px) {
  .page-disclaimer .dc-hero__media img {
    aspect-ratio: 16 / 7;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .dc-toc__link,
  .page-disclaimer .dc-clause__tail a {
    transition: none;
  }
}