/* ===== 使用说明页 /instructions/ ===== */
.page-disclaimer {
  --dn-ink-soft: rgba(27, 20, 16, 0.74);
  --dn-ink-dim: rgba(27, 20, 16, 0.52);
  --dn-accent-ink: #A8480F;
  background: var(--void);
  color: var(--text);
}

/* ---------- 首屏：暗场里的说明卡 ---------- */
.page-disclaimer .dn-hero {
  position: relative;
  overflow: hidden;
  padding: 118px 0 96px;
  background:
    radial-gradient(92% 130% at 80% 0%, var(--violet-b) 0%, rgba(75, 30, 122, 0) 58%),
    linear-gradient(180deg, var(--void) 0%, var(--panel) 100%);
}

.page-disclaimer .dn-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(168, 179, 196, 0.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(168, 179, 196, 0.09) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.page-disclaimer .dn-hero__layout {
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.page-disclaimer .dn-hero__card {
  grid-column: 3 / -1;
  position: relative;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid rgba(27, 20, 16, 0.18);
  padding: 34px 40px 30px;
}

.page-disclaimer .dn-hero__card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(27, 20, 16, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(27, 20, 16, 0.07) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.page-disclaimer .dn-hero__card > * {
  position: relative;
}

.page-disclaimer .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-size: 13px;
}

.page-disclaimer .breadcrumbs a {
  color: var(--dn-ink-dim);
  text-decoration: none;
}

.page-disclaimer .breadcrumbs a:hover {
  color: var(--ink);
  text-decoration: underline;
}

.page-disclaimer .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(27, 20, 16, 0.3);
}

.page-disclaimer .breadcrumbs li[aria-current="page"] {
  color: var(--dn-ink-soft);
}

.page-disclaimer .dn-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dn-accent-ink);
}

.page-disclaimer .dn-title {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 4.6vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-disclaimer .dn-lead {
  max-width: 46ch;
  margin: 0 0 28px;
  font-size: 16px;
  line-height: 1.95;
  color: var(--dn-ink-soft);
}

.page-disclaimer .dn-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 28px;
  margin: 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid rgba(27, 20, 16, 0.18);
}

.page-disclaimer .dn-meta li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--dn-ink-soft);
}

.page-disclaimer .dn-meta .num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 21px;
  letter-spacing: 0.02em;
  color: var(--dn-accent-ink);
}

/* ---------- 通栏说明图 ---------- */
.page-disclaimer .dn-banner-wrap {
  margin-top: 52px;
}

.page-disclaimer .dn-banner {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--panel);
}

.page-disclaimer .dn-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 5;
  object-fit: cover;
}

/* ---------- 主体双轨布局 ---------- */
.page-disclaimer .dn-layout {
  display: grid;
  grid-template-columns: 172px minmax(0, 1fr);
  gap: 56px;
  padding-top: 76px;
  padding-bottom: 132px;
}

.page-disclaimer .dn-toc {
  position: sticky;
  top: 92px;
  align-self: start;
}

.page-disclaimer .dn-toc__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-disclaimer .dn-toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-disclaimer .dn-toc a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0 10px 16px;
  font-size: 14px;
  color: var(--text-dim);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-disclaimer .dn-toc a .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
}

.page-disclaimer .dn-toc a:hover {
  color: var(--text);
  border-left-color: var(--neon);
  padding-left: 20px;
}

.page-disclaimer .dn-toc a:hover .num {
  color: var(--neon);
}

/* ---------- 章节 ---------- */
.page-disclaimer .dn-sec {
  scroll-margin-top: 96px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
  margin-bottom: 68px;
}

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

.page-disclaimer .dn-sec__head {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  column-gap: 20px;
  align-items: start;
  margin-bottom: 26px;
}

.page-disclaimer .dn-sec__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--neon);
}

.page-disclaimer .dn-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 2.4vw, 32px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-disclaimer .dn-sec__note {
  grid-column: 2;
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--text-dim);
}

/* ---------- 条目块 ---------- */
.page-disclaimer .dn-item {
  border: 1px solid var(--line);
  border-left: 2px solid transparent;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0));
  padding: 20px 24px 22px;
  margin-bottom: 14px;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-disclaimer .dn-item:hover {
  border-left-color: var(--neon);
  transform: translateY(-2px);
}

.page-disclaimer .dn-item h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-disclaimer .dn-item p {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-soft);
}

.page-disclaimer .dn-item p a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(70, 245, 163, 0.45);
  transition: border-color 0.2s var(--ease);
}

.page-disclaimer .dn-item p a:hover {
  border-bottom-color: var(--neon);
}

/* ---------- 折叠细节 ---------- */
.page-disclaimer .dn-fold {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.page-disclaimer .dn-fold summary {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-size: 14px;
  color: var(--neon);
}

.page-disclaimer .dn-fold summary::-webkit-details-marker {
  display: none;
}

.page-disclaimer .dn-fold summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-weight: 600;
}

.page-disclaimer .dn-fold[open] {
  border-left: 2px solid var(--pulse);
  padding-left: 14px;
}

.page-disclaimer .dn-fold[open] summary::before {
  content: "–";
}

.page-disclaimer .dn-fold p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-disclaimer .dn-fold p a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(70, 245, 163, 0.45);
}

.page-disclaimer .dn-fold p a:hover {
  border-bottom-color: var(--neon);
}

/* ---------- 维度示意 ---------- */
.page-disclaimer .dn-figure {
  margin: 30px 0 0;
  padding: 24px 24px 18px;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(42, 19, 80, 0.55), rgba(14, 22, 51, 0.92));
}

.page-disclaimer .dn-diagram {
  display: block;
  width: 100%;
  height: auto;
}

.page-disclaimer .dn-diagram .dg-label {
  font-family: var(--font-body);
  font-size: 13px;
  fill: var(--text-soft);
}

.page-disclaimer .dn-diagram .dg-bar {
  fill: rgba(70, 245, 163, 0.14);
  stroke: var(--neon);
  stroke-width: 1;
}

.page-disclaimer .dn-diagram .dg-axis {
  stroke: var(--line-strong);
  stroke-width: 1;
}

.page-disclaimer .dn-diagram .dg-tick {
  stroke: var(--line-strong);
  stroke-width: 1;
}

.page-disclaimer .dn-diagram .dg-mark {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--silver);
}

.page-disclaimer .dn-diagram .dg-pill--neon {
  fill: rgba(70, 245, 163, 0.16);
  stroke: var(--neon);
  stroke-width: 1;
}

.page-disclaimer .dn-diagram .dg-pill--pulse {
  fill: rgba(255, 122, 47, 0.18);
  stroke: var(--pulse);
  stroke-width: 1;
}

.page-disclaimer .dn-diagram .dg-pill-text {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--text);
}

.page-disclaimer .dn-figure figcaption {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 联系方式块 ---------- */
.page-disclaimer .dn-contact {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-disclaimer .dn-contact li {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 6px 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-disclaimer .dn-contact__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  padding-top: 4px;
}

.page-disclaimer .dn-contact__val {
  font-size: 16px;
  color: var(--text);
  word-break: break-word;
}

.page-disclaimer .dn-contact__val.num {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--neon);
}

.page-disclaimer .dn-contact__desc {
  grid-column: 2;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-disclaimer .dn-contact__desc a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(70, 245, 163, 0.45);
}

.page-disclaimer .dn-contact__desc a:hover {
  border-bottom-color: var(--neon);
}

.page-disclaimer .dn-sla {
  margin: 0;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--pulse);
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- 吸底反馈条 ---------- */
.page-disclaimer .dn-sticky {
  position: sticky;
  bottom: 0;
  z-index: 6;
  background: rgba(14, 22, 51, 0.94);
  border-top: 1px solid var(--line-strong);
  backdrop-filter: blur(10px);
}

.page-disclaimer .dn-sticky__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
}

.page-disclaimer .dn-sticky__inner p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-soft);
}

/* ---------- 锚点闪烁 ---------- */
.page-disclaimer .dn-sec:target,
.page-disclaimer .dn-item:target {
  animation: dn-flash 1.4s var(--ease) 1;
}

@keyframes dn-flash {
  0% { box-shadow: none; }
  28% { box-shadow: 0 0 0 1px var(--pulse); }
  100% { box-shadow: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1020px) {
  .page-disclaimer .dn-hero {
    padding: 108px 0 72px;
  }

  .page-disclaimer .dn-hero__card {
    grid-column: 1 / -1;
    padding: 30px 32px 26px;
  }

  .page-disclaimer .dn-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 34px;
    padding-top: 52px;
    padding-bottom: 108px;
  }

  .page-disclaimer .dn-toc {
    position: static;
  }

  .page-disclaimer .dn-toc__label {
    display: none;
  }

  .page-disclaimer .dn-toc ol {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    border-left: 0;
    border-bottom: 1px solid var(--line);
    padding-bottom: 12px;
    -webkit-overflow-scrolling: touch;
  }

  .page-disclaimer .dn-toc li {
    flex: 0 0 auto;
  }

  .page-disclaimer .dn-toc a {
    margin-left: 0;
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-left: 1px solid var(--line);
    white-space: nowrap;
  }

  .page-disclaimer .dn-toc a:hover {
    padding-left: 12px;
    border-color: var(--neon);
  }
}

@media (max-width: 640px) {
  .page-disclaimer .dn-hero {
    padding: 96px 0 56px;
  }

  .page-disclaimer .dn-hero__card {
    padding: 24px 18px 22px;
  }

  .page-disclaimer .dn-meta {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .page-disclaimer .dn-banner-wrap {
    margin-top: 32px;
  }

  .page-disclaimer .dn-banner img {
    aspect-ratio: 4 / 3;
  }

  .page-disclaimer .dn-sec__head {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 6px;
  }

  .page-disclaimer .dn-sec__num {
    font-size: 20px;
  }

  .page-disclaimer .dn-sec__note {
    grid-column: 1;
  }

  .page-disclaimer .dn-item {
    padding: 18px 16px 20px;
  }

  .page-disclaimer .dn-figure {
    padding: 16px 14px 14px;
  }

  .page-disclaimer .dn-contact li {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-disclaimer .dn-contact__desc {
    grid-column: 1;
  }

  .page-disclaimer .dn-sticky__inner {
    padding: 10px 0;
  }

  .page-disclaimer .dn-sticky__inner p {
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .dn-item,
  .page-disclaimer .dn-toc a {
    transition: none;
  }

  .page-disclaimer .dn-sec:target,
  .page-disclaimer .dn-item:target {
    animation: none;
  }
}