/* ===== 使用说明页面专属 CSS ===== */
.page-disclaimer {
  --page-disclaimer-header-color: #C04E3A; /* 陶土色 */
  --page-disclaimer-bg: #F5F0E0;
  --page-disclaimer-text: #4A4A4A;
  --page-disclaimer-border: #8B8680;
  --page-disclaimer-muted: #6B8E4E;
  --page-disclaimer-accent: #1A2B4C;
  --page-disclaimer-font-body: 'Inter', sans-serif;
  --page-disclaimer-font-heading: 'Oswald', sans-serif;
  --page-disclaimer-shadow: 0 4px 12px rgba(0,0,0,0.15);
  --page-disclaimer-border-width: 4px;

  font-family: var(--page-disclaimer-font-body);
  color: var(--page-disclaimer-text);
  background-color: var(--page-disclaimer-bg);
  line-height: 1.6;
  max-width: 100%;
  overflow-x: hidden;
}

/* 容器：移动端优先单列 */
.page-disclaimer__container {
  display: flex;
  flex-direction: column;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  gap: 1.5rem;
}

/* 左侧索引 – 移动端折叠为水平栏 */
.page-disclaimer__index {
  background: white;
  border: var(--page-disclaimer-border-width) solid var(--page-disclaimer-border);
  box-shadow: var(--page-disclaimer-shadow);
  padding: 1.25rem;
  order: -1;
}

.page-disclaimer__index-title {
  font-family: var(--page-disclaimer-font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 0.75rem 0;
  color: var(--page-disclaimer-header-color);
  border-bottom: 2px solid var(--page-disclaimer-border);
  padding-bottom: 0.5rem;
}

.page-disclaimer__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
}

.page-disclaimer__index-item {
  margin: 0;
}

.page-disclaimer__index-link {
  font-family: var(--page-disclaimer-font-heading);
  font-weight: 600;
  text-transform: uppercase;
  color: var(--page-disclaimer-text);
  text-decoration: underline;
  text-decoration-color: var(--page-disclaimer-header-color);
  text-underline-offset: 4px;
  font-size: 0.95rem;
  transition: color 0.25s ease, background-color 0.25s ease;
  padding: 0.15rem 0;
}

.page-disclaimer__index-link:hover,
.page-disclaimer__index-link:focus {
  color: var(--page-disclaimer-header-color);
  background-color: transparent;
  text-decoration-thickness: 2px;
}

/* 右侧内容区 */
.page-disclaimer__content {
  flex: 1;
  min-width: 0;
}

/* 头部 */
.page-disclaimer__header {
  margin-bottom: 2rem;
}

.page-disclaimer__hero-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--page-disclaimer-border-width) solid var(--page-disclaimer-border);
  margin-bottom: 1.5rem;
  box-shadow: var(--page-disclaimer-shadow);
}

.page-disclaimer__title {
  font-family: var(--page-disclaimer-font-heading);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--page-disclaimer-header-color);
  text-transform: uppercase;
  margin: 0 0 0.5rem 0;
  letter-spacing: 0.02em;
}

.page-disclaimer__subtitle {
  font-size: 1.05rem;
  color: var(--page-disclaimer-text);
  margin: 0;
  opacity: 0.85;
  line-height: 1.6;
}

/* 章节分割线 */
.page-disclaimer__divider {
  margin: 2.5rem 0 2rem 0;
}

.page-disclaimer__divider-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: none;
  opacity: 0.3;
}

/* 章节 */
.page-disclaimer__section {
  scroll-margin-top: 1.5rem;
}

.page-disclaimer__section-heading {
  font-family: var(--page-disclaimer-font-heading);
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--page-disclaimer-header-color);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 0 0 1rem 0;
  border-left: var(--page-disclaimer-border-width) solid var(--page-disclaimer-header-color);
  padding-left: 0.75rem;
}

.page-disclaimer__section-body {
  font-size: 1rem;
  color: var(--page-disclaimer-text);
}

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

.page-disclaimer__section-body ul {
  margin: 0 0 1.5rem 0;
  padding-left: 1.25rem;
}

.page-disclaimer__section-body li {
  margin-bottom: 0.5rem;
}

.page-disclaimer__section-body a {
  color: var(--page-disclaimer-header-color);
  text-decoration: underline;
  font-weight: 600;
}

.page-disclaimer__section-body a:hover {
  color: var(--page-disclaimer-accent);
}

/* 桌面端 >= 768px */
@media (min-width: 768px) {
  .page-disclaimer__container {
    flex-direction: row;
    align-items: flex-start;
    padding: 2rem;
    gap: 2.5rem;
  }

  .page-disclaimer__index {
    position: sticky;
    top: 2rem;
    width: 260px;
    min-width: 220px;
    flex-shrink: 0;
    order: 0;
    padding: 1.5rem;
  }

  .page-disclaimer__index-list {
    flex-direction: column;
    gap: 0.5rem;
  }

  .page-disclaimer__index-item {
    border-bottom: 1px solid var(--page-disclaimer-border);
    padding: 0.25rem 0;
  }

  .page-disclaimer__index-link {
    font-size: 1rem;
  }

  .page-disclaimer__content {
    flex: 1;
  }

  .page-disclaimer__title {
    font-size: 2.75rem;
  }

  .page-disclaimer__section-heading {
    font-size: 2rem;
  }

  .page-disclaimer__hero-img {
    height: 200px;
    object-position: center center;
  }
}

/* 大桌面端 >= 1024px */
@media (min-width: 1024px) {
  .page-disclaimer__container {
    padding: 2.5rem 3rem;
    gap: 3rem;
  }

  .page-disclaimer__index {
    width: 300px;
    min-width: 260px;
    padding: 2rem;
  }

  .page-disclaimer__title {
    font-size: 3.25rem;
  }

  .page-disclaimer__section-heading {
    font-size: 2.25rem;
  }

  .page-disclaimer__section-body {
    font-size: 1.0625rem;
  }
}