/* =============================================
   page-disclaimer – 使用说明页面专属样式
   作用域：.page-disclaimer
   移动端优先，桌面增强
   ============================================= */
.page-disclaimer {
  --pd-bg: var(--color-bg-dark, #0B0D17);
  --pd-accent: var(--color-accent, #FF6B35);
  --pd-gold: var(--color-gold, #D4A017);
  --pd-blue: var(--color-blue-deep, #1A2B4C);
  --pd-text: var(--color-text-primary, #FFFFFF);
  --pd-text-muted: var(--color-text-secondary, #A0A8B4);
  --pd-glass: var(--color-glass, rgba(255,255,255,0.08));
  --pd-divider: var(--color-divider, #FF6B3544);
  --pd-font-heading: var(--font-heading, 'Arial Black','Impact',sans-serif);
  --pd-font-body: var(--font-body, 'Merriweather','Noto Serif SC',serif);
  --pd-font-data: var(--font-data, 'Source Code Pro','Courier New',monospace);
  --pd-fs-h1: var(--fs-h1, clamp(3rem,6vw,6rem));
  --pd-fs-h2: var(--fs-h2, clamp(2rem,4vw,4rem));
  --pd-fs-body: var(--fs-body, clamp(1rem,1.4vw,1.2rem));
  --pd-fs-small: var(--fs-small, 0.85rem);
  --pd-container-max: var(--container-max, 1200px);
  --pd-header-h: var(--header-height, 72px);
  --pd-trans: var(--transition-fast, 300ms ease);
  --pd-section-gap: 3rem;
  --pd-content-max: 760px;

  display: block;
  width: 100%;
  background-color: var(--pd-bg);
  color: var(--pd-text);
  font-family: var(--pd-font-body);
  font-size: var(--pd-fs-body);
  line-height: 1.7;
  padding: 0;
  margin: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---- 容器 ---- */
.page-disclaimer__container {
  max-width: var(--pd-container-max);
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

/* ---- 英雄区 ---- */
.page-disclaimer__hero {
  text-align: center;
  padding: 3rem 0 2rem;
  position: relative;
  border-bottom: 2px solid var(--pd-divider);
  margin-bottom: var(--pd-section-gap);
}

.page-disclaimer__hero-icon {
  display: block;
  width: 120px;
  height: 120px;
  margin: 0 auto 1.5rem;
  object-fit: contain;
  border-radius: 50%;
  background: var(--pd-glass);
  padding: 0.75rem;
  box-shadow: 0 0 0 1px var(--pd-divider);
}

.page-disclaimer__title {
  font-family: var(--pd-font-heading);
  font-size: var(--pd-fs-h1);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--pd-text);
  margin: 0 0 0.5rem;
  line-height: 1.1;
  text-transform: uppercase;
}

.page-disclaimer__subtitle {
  font-family: var(--pd-font-body);
  font-size: var(--pd-fs-small);
  color: var(--pd-text-muted);
  margin: 0 0 1.5rem;
  letter-spacing: 0.02em;
}

.page-disclaimer .breadcrumb {
  display: flex;
  justify-content: center;
  margin: 0;
}

.page-disclaimer .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--pd-fs-small);
  font-family: var(--pd-font-data);
  color: var(--pd-text-muted);
}

.page-disclaimer .breadcrumb__link {
  color: var(--pd-accent);
  text-decoration: none;
  transition: color var(--pd-trans);
}

.page-disclaimer .breadcrumb__link:hover,
.page-disclaimer .breadcrumb__link:focus-visible {
  color: var(--pd-gold);
  text-decoration: underline;
}

.page-disclaimer .breadcrumb__item[aria-current="page"] {
  color: var(--pd-gold);
  font-weight: 600;
}

/* ---- 主体内容 ---- */
.page-disclaimer__body {
  max-width: var(--pd-content-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--pd-section-gap);
}

/* ---- 章节 ---- */
.page-disclaimer__section {
  background: var(--pd-glass);
  border-radius: 12px;
  padding: 1.5rem 1.25rem;
  border-left: 4px solid var(--pd-accent);
  transition: box-shadow var(--pd-trans);
}

.page-disclaimer__section:hover {
  box-shadow: 0 4px 24px rgba(255, 107, 53, 0.08);
}

.page-disclaimer__section--meta {
  border-left-color: var(--pd-gold);
}

.page-disclaimer__section-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--pd-divider);
  padding-bottom: 0.75rem;
}

.page-disclaimer__section-num {
  font-family: var(--pd-font-data);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--pd-accent);
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.page-disclaimer__section--meta .page-disclaimer__section-num {
  color: var(--pd-gold);
}

.page-disclaimer__section-title {
  font-family: var(--pd-font-heading);
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 700;
  color: var(--pd-text);
  margin: 0;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.page-disclaimer__section-content {
  font-size: var(--pd-fs-body);
  color: var(--pd-text);
}

.page-disclaimer__section-content p {
  margin: 0 0 1rem;
}

.page-disclaimer__section-content p:last-child {
  margin-bottom: 0;
}

/* 章节内图标（版权印章） */
.page-disclaimer__section-icon {
  display: block;
  width: 60px;
  height: 60px;
  margin: 0 0 1rem 0;
  object-fit: contain;
  opacity: 0.85;
  border-radius: 8px;
  background: var(--pd-blue);
  padding: 0.4rem;
}

/* ---- 列表 ---- */
.page-disclaimer__list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-disclaimer__list li {
  position: relative;
  padding-left: 1.6rem;
  font-size: var(--pd-fs-body);
  line-height: 1.6;
  color: var(--pd-text);
}

.page-disclaimer__list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--pd-accent);
  font-weight: 700;
}

.page-disclaimer__section--meta .page-disclaimer__list li::before {
  color: var(--pd-gold);
}

/* ---- 联系信息 ---- */
.page-disclaimer__contact {
  list-style: none;
  margin: 0.75rem 0 1rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-disclaimer__contact li {
  font-size: var(--pd-fs-body);
  line-height: 1.6;
  color: var(--pd-text);
}

.page-disclaimer__contact-label {
  font-family: var(--pd-font-data);
  font-size: var(--pd-fs-small);
  color: var(--pd-text-muted);
  margin-right: 0.25rem;
  letter-spacing: 0.03em;
}

.page-disclaimer__contact-note {
  font-size: var(--pd-fs-small);
  color: var(--pd-text-muted);
  margin-left: 0.35rem;
}

.page-disclaimer__link {
  color: var(--pd-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--pd-trans), color var(--pd-trans);
}

.page-disclaimer__link:hover,
.page-disclaimer__link:focus-visible {
  color: var(--pd-gold);
  border-bottom-color: var(--pd-gold);
}

/* ---- ICP ---- */
.page-disclaimer__icp {
  font-family: var(--pd-font-data);
  font-size: var(--pd-fs-small);
  color: var(--pd-text-muted);
  margin: 1rem 0 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--pd-divider);
}

/* ---- 分割线 ---- */
.page-disclaimer__divider {
  width: 60px;
  height: 3px;
  background: linear-gradient(135deg, var(--pd-accent), var(--pd-gold));
  margin: 1.25rem 0 0.75rem;
  border-radius: 2px;
  transform: skewX(-15deg);
}

/* ---- 脚注 ---- */
.page-disclaimer__footnote {
  font-size: var(--pd-fs-small);
  color: var(--pd-text-muted);
  font-style: italic;
  line-height: 1.5;
  margin: 0.5rem 0 0;
}

/* ---- 返回顶部 ---- */
.page-disclaimer .scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--pd-accent);
  color: var(--pd-bg);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.35);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--pd-trans), visibility var(--pd-trans), transform var(--pd-trans);
  z-index: 100;
}

.page-disclaimer .scroll-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.page-disclaimer .scroll-top:hover,
.page-disclaimer .scroll-top:focus-visible {
  transform: scale(1.08);
  background: var(--pd-gold);
  color: var(--pd-bg);
  box-shadow: 0 6px 20px rgba(212, 160, 23, 0.4);
}

/* ---- 媒体查询：平板及以上 ---- */
@media (min-width: 640px) {
  .page-disclaimer__container {
    padding: 3rem 2rem 5rem;
  }

  .page-disclaimer__hero {
    padding: 4rem 0 2.5rem;
  }

  .page-disclaimer__hero-icon {
    width: 140px;
    height: 140px;
    padding: 1rem;
  }

  .page-disclaimer__section {
    padding: 2rem 2rem 2rem 2.5rem;
    border-left-width: 6px;
  }

  .page-disclaimer__section-icon {
    width: 72px;
    height: 72px;
    margin-bottom: 1.25rem;
  }

  .page-disclaimer__section-header {
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
  }

  .page-disclaimer__section-num {
    font-size: 1rem;
  }

  .page-disclaimer__list {
    gap: 0.65rem;
  }

  .page-disclaimer__list li {
    padding-left: 2rem;
  }

  .page-disclaimer__contact {
    gap: 0.65rem;
  }

  .page-disclaimer .scroll-top {
    bottom: 2.5rem;
    right: 2rem;
    width: 48px;
    height: 48px;
  }
}

/* ---- 媒体查询：桌面 ---- */
@media (min-width: 1024px) {
  .page-disclaimer__container {
    padding: 4rem 2rem 6rem;
  }

  .page-disclaimer__hero {
    padding: 5rem 0 3rem;
  }

  .page-disclaimer__hero-icon {
    width: 160px;
    height: 160px;
  }

  .page-disclaimer__body {
    gap: 4rem;
  }

  .page-disclaimer__section {
    padding: 2.5rem 3rem;
    border-left-width: 8px;
    border-radius: 16px;
  }

  .page-disclaimer__section-icon {
    width: 80px;
    height: 80px;
  }

  .page-disclaimer__section-title {
    font-size: 1.8rem;
  }

  .page-disclaimer__footnote {
    font-size: 0.9rem;
  }

  .page-disclaimer .scroll-top {
    right: 3rem;
    width: 52px;
    height: 52px;
  }
}

/* ---- 媒体查询：超大屏 ---- */
@media (min-width: 1600px) {
  .page-disclaimer__container {
    padding: 5rem 2rem 8rem;
  }

  .page-disclaimer__body {
    max-width: 840px;
  }
}