/* ===== 使用说明（/instructions/）页面专属样式 ===== */
.page-disclaimer {
  background: var(--yb-navy);
  color: var(--yb-cream);
}

/* 阅读进度条：页顶荧光绿渐变 */
.page-disclaimer .pd-read-progress {
  height: 3px;
  background-image: linear-gradient(90deg, var(--yb-green), var(--yb-orange));
  box-shadow: 0 0 14px rgba(57, 255, 20, 0.4);
}

/* ===== 文档英雄区 ===== */
.pd-hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 64px;
  background:
    radial-gradient(circle at 85% 18%, rgba(255, 77, 0, 0.16), transparent 38%),
    linear-gradient(160deg, var(--yb-navy-deep) 0%, var(--yb-navy) 66%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 44px), 90% 100%, 0 calc(100% - 8px));
}

.pd-hero::before {
  content: "";
  position: absolute;
  right: -70px;
  top: 48px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background:
    radial-gradient(circle, transparent 0 34%, rgba(57, 255, 20, 0.14) 35% 36%, transparent 37% 61%, rgba(57, 255, 20, 0.14) 62% 63%, transparent 64%);
  box-shadow: inset 0 0 0 1px rgba(57, 255, 20, 0.1);
  pointer-events: none;
}

.pd-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(57, 255, 20, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.pd-hero__inner {
  position: relative;
  z-index: 1;
}

.pd-hero__grid {
  margin-top: 40px;
}

.pd-hero__kicker {
  margin: 0 0 12px;
  font-family: var(--yb-font-display);
  font-size: 14px;
  letter-spacing: 0.22em;
  color: var(--yb-green);
}

.pd-hero h1 {
  margin: 0;
  font-family: var(--yb-font-display);
  font-weight: 700;
  font-size: clamp(52px, 12vw, 72px);
  line-height: 0.98;
  letter-spacing: 0.01em;
  color: var(--yb-cream);
}

.pd-hero h1::after {
  content: "";
  display: block;
  width: 64px;
  height: 5px;
  margin-top: 16px;
  background: var(--yb-orange);
  clip-path: polygon(0 0, 100% 0, 82% 100%, 0 100%);
}

.pd-hero__lead {
  max-width: 52ch;
  margin: 24px 0 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--yb-fog);
}

.pd-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 32px 0 0;
}

.pd-hero__meta > div {
  flex: 1 1 140px;
  background: var(--yb-glass);
  border: 1px solid var(--yb-border);
  border-left: 3px solid var(--yb-green);
  padding: 10px 14px;
}

.pd-hero__meta dt {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--yb-fog);
  opacity: 0.75;
}

.pd-hero__meta dd {
  margin: 4px 0 0;
  font-family: var(--yb-font-display);
  font-size: 20px;
  letter-spacing: 0.03em;
  color: var(--yb-cream);
}

/* ===== 索引与文档布局 ===== */
.pd-layout {
  padding-top: 40px;
  padding-bottom: 72px;
}

.pd-index {
  margin-bottom: 40px;
  background: var(--yb-glass);
  border: 1px solid var(--yb-border);
  padding: 20px;
}

.pd-index__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--yb-font-display);
  font-size: 18px;
  letter-spacing: 0.08em;
  color: var(--yb-cream);
}

.pd-index__title::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--yb-green);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
}

.pd-index__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  border-top: 1px solid var(--yb-border);
}

.pd-index__list li {
  border-bottom: 1px solid var(--yb-border);
}

.pd-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 2px;
  font-family: var(--yb-font-display);
  font-size: 17px;
  color: var(--yb-fog);
  text-decoration: none;
  transition:
    color var(--yb-speed-fast) var(--yb-ease),
    padding-left var(--yb-speed-fast) var(--yb-ease);
}

.pd-index__list a span {
  font-size: 12px;
  color: var(--yb-green);
}

.pd-index__list a:hover,
.pd-index__list a:focus-visible {
  color: var(--yb-cream);
  padding-left: 8px;
}

.pd-index__note {
  border-top: 1px dashed var(--yb-border);
  padding-top: 14px;
}

.pd-index__note p {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--yb-fog);
}

.pd-document {
  display: grid;
  gap: 44px;
}

/* ===== 条款区块 ===== */
.page-disclaimer .pd-section {
  scroll-margin-top: 96px;
}

.pd-section__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.pd-section__num {
  font-family: var(--yb-font-display);
  font-weight: 700;
  font-size: 42px;
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: var(--yb-orange);
}

.pd-section__head h2 {
  margin: 0;
  font-family: var(--yb-font-display);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--yb-cream);
}

.pd-section__body.yb-card--cream {
  background:
    linear-gradient(135deg, rgba(16, 24, 32, 0.04) 0 6px, transparent 6px),
    var(--yb-cream);
  padding: 24px 22px;
  border-radius: 2px;
  border-left: 4px solid var(--yb-orange);
  box-shadow: 0 16px 32px -16px rgba(0, 0, 0, 0.55);
  color: var(--yb-ink);
}

.pd-section__intro {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--yb-ink);
}

/* ===== 可折叠条款 ===== */
.pd-clause summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px 0 13px;
  font-family: var(--yb-font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
  color: var(--yb-ink);
  border-top: 1px solid rgba(16, 24, 32, 0.14);
}

.pd-clause summary::-webkit-details-marker {
  display: none;
}

.pd-clause summary::marker {
  content: "";
}

.pd-clause summary::before {
  content: "+";
  width: 22px;
  height: 22px;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--yb-orange);
  font-family: var(--yb-font-display);
  font-size: 15px;
  line-height: 1;
  color: var(--yb-orange);
  transition:
    background var(--yb-speed-fast) var(--yb-ease),
    color var(--yb-speed-fast) var(--yb-ease);
}

.pd-clause[open] summary::before {
  content: "−";
  background: var(--yb-orange);
  color: var(--yb-cream);
}

.pd-clause__content {
  padding: 0 0 18px 32px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(16, 24, 32, 0.82);
}

.pd-clause__content p {
  margin: 0;
}

/* ===== 数据事实卡 ===== */
.pd-fact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
  margin: 22px 0;
}

.pd-fact > div {
  background: var(--yb-navy);
  border-left: 2px solid var(--yb-green);
  padding: 12px 14px;
}

.pd-fact dt {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--yb-fog);
  opacity: 0.8;
}

.pd-fact dd {
  margin: 6px 0 0;
  font-family: var(--yb-font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--yb-cream);
}

/* ===== 知识产权插图 ===== */
.pd-ip-figure {
  position: relative;
  overflow: hidden;
  margin: 24px 0;
  background: var(--yb-navy);
  border: 1px solid var(--yb-border);
  padding: 14px;
}

.pd-ip-figure::after {
  content: "";
  position: absolute;
  right: -18px;
  bottom: -18px;
  width: 72px;
  height: 72px;
  border: 1px solid rgba(57, 255, 20, 0.25);
  border-radius: 50%;
  pointer-events: none;
}

.pd-ip-figure img {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 0 auto;
  filter: grayscale(1) contrast(1.08);
  transition: filter var(--yb-speed) var(--yb-ease);
}

.pd-ip-figure:hover img {
  filter: grayscale(0) contrast(1);
}

.pd-ip-figure figcaption {
  padding-top: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-align: center;
  color: var(--yb-fog);
  opacity: 0.72;
}

/* ===== 修订注记 ===== */
.pd-revnote {
  margin: 18px 0 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(16, 24, 32, 0.2);
  font-size: 13px;
  color: rgba(16, 24, 32, 0.6);
}

/* ===== 页尾联系区 ===== */
.pd-outro {
  margin-top: 12px;
  background:
    linear-gradient(120deg, rgba(57, 255, 20, 0.1) 0%, transparent 60%),
    var(--yb-navy-deep);
  border: 1px solid var(--yb-border);
  padding: 28px 20px;
}

.pd-outro__inner {
  max-width: 640px;
  margin: 0 auto;
}

.pd-outro h2 {
  margin: 0 0 10px;
  font-family: var(--yb-font-display);
  font-size: 32px;
  letter-spacing: 0.02em;
  color: var(--yb-cream);
}

.pd-outro p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--yb-fog);
}

.pd-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ===== 桌面端布局 ===== */
@media (min-width: 900px) {
  .pd-hero {
    padding: 128px 0 88px;
  }

  .pd-hero__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 48px;
    align-items: end;
  }

  .pd-hero h1 {
    font-size: clamp(76px, 9vw, 112px);
  }

  .pd-hero__lead {
    margin-top: 32px;
    font-size: 18px;
  }

  .pd-hero__meta {
    margin-top: 44px;
  }

  .pd-layout {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding-top: 56px;
  }

  .pd-index {
    position: sticky;
    top: 112px;
    margin-bottom: 0;
    padding: 24px;
  }

  .pd-document {
    max-width: 880px;
  }

  .pd-section {
    position: relative;
    padding-left: 26px;
  }

  .pd-section::before {
    content: "";
    position: absolute;
    left: 0;
    top: 52px;
    bottom: -24px;
    width: 2px;
    background: linear-gradient(to bottom, var(--yb-green), rgba(57, 255, 20, 0.18) 68%, transparent);
  }

  .pd-section:last-child::before {
    bottom: auto;
    height: 24px;
  }

  .pd-section__head h2 {
    font-size: 32px;
  }

  .pd-section__num {
    font-size: 52px;
  }

  .pd-section__body {
    padding: 36px 38px;
  }

  .pd-outro {
    padding: 40px 32px;
  }
}

@media (min-width: 1200px) {
  .pd-layout {
    grid-template-columns: 300px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer *,
  .page-disclaimer *::before,
  .page-disclaimer *::after {
    transition-duration: 0.01ms !important;
  }
}