/* ==========================================================================
   Feed 页面专用样式表 (Atom 订阅说明页)
   依托 #content 的白色卡片基础容器，维持全站统一视觉语言
   ========================================================================== */

.feed-header {
  margin-bottom: 1.6rem;
}

.feed-intro {
  margin: 0.5rem 0 0;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 46rem;
}

/* 订阅卡片区 */
.feed-box {
  margin: 1.5rem 0 2.2rem;
  padding: 1.1rem 1.25rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  max-width: 46rem;
  box-sizing: border-box;
}

.feed-box__label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.7rem;
}

.feed-badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-pill);
  background: rgba(199, 67, 80, 0.1);
  color: var(--color-accent);
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1.3;
  font-family: var(--font-mono);
}

.feed-box__hint {
  color: var(--color-text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
}

.feed-box__main {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--color-bg-content);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.5rem 0.45rem 0.85rem;
  box-sizing: border-box;
}

.feed-box__code {
  flex: 1;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--color-text-body);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  user-select: all;
  background: transparent;
  padding: 0;
  border: none;
}

.feed-box__actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

.feed-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.42rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.2;
  cursor: pointer;
  text-decoration: none;
  border: 1px solid transparent;
  transition: all 0.18s ease;
  box-sizing: border-box;
}

.feed-btn__icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

#content.feed-page .feed-btn,
#content.feed-page .feed-btn:link,
#content.feed-page .feed-btn:visited {
  background-image: none !important;
  text-decoration: none !important;
}

.feed-btn--primary {
  background: var(--color-text);
  color: var(--color-text-inverse);
  border-color: var(--color-text);
}

.feed-btn--primary:hover {
  background: #333;
  border-color: #333;
}

#content.feed-page .feed-btn--primary:hover,
#content.feed-page .feed-btn--primary:active {
  color: var(--color-text-inverse) !important;
}

.feed-btn--primary.is-copied {
  background: #2e7d32;
  border-color: #2e7d32;
}

#content.feed-page .feed-btn--secondary,
#content.feed-page .feed-btn--secondary:link,
#content.feed-page .feed-btn--secondary:visited {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text-secondary);
}

#content.feed-page .feed-btn--secondary:hover {
  background: var(--color-bg);
  border-color: #bbb;
  color: var(--color-text);
}

/* 常见客户端提示 */
.feed-tips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.85rem;
  color: var(--color-text-muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.feed-tips__title {
  color: var(--color-text-secondary);
}

.feed-tips__sep {
  color: #ccc;
}

/* 近期更新样例 */
.feed-preview {
  margin-top: 2.2rem;
}

.feed-section-title {
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-body);
}

.feed-preview-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.feed-preview-item {
  display: flex;
  align-items: baseline;
  gap: 1.2rem;
  padding: 0.55rem 0.5rem;
  border-left: 2px solid transparent;
  transition: background-color 0.15s ease, border-left-color 0.15s ease;
}

.feed-preview-item:hover {
  background-color: rgba(199, 67, 80, 0.04);
  border-left-color: var(--color-accent);
}

.feed-preview-date {
  flex-shrink: 0;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: -0.01em;
}

#content.feed-page .feed-preview-link,
#content.feed-page .feed-preview-link:link,
#content.feed-page .feed-preview-link:visited {
  color: var(--color-text-body);
  text-decoration: none;
  font-size: 0.94rem;
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  background-image: linear-gradient(var(--color-accent), var(--color-accent));
  background-size: 0% var(--underline-thickness);
  background-repeat: no-repeat;
  background-position: left bottom;
  padding-bottom: var(--underline-gap);
  transition: color 0.2s ease, background-size var(--underline-speed) ease;
}

#content.feed-page .feed-preview-link:hover,
#content.feed-page .feed-preview-link:active {
  color: var(--color-accent);
  background-size: 100% var(--underline-thickness);
}

/* 返回首页 */
.feed-footer {
  margin-top: 2.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.85rem;
}

#content.feed-page .feed-footer a,
#content.feed-page .feed-footer a:link,
#content.feed-page .feed-footer a:visited {
  color: var(--color-text-secondary);
  text-decoration: none;
}

#content.feed-page .feed-footer a:hover {
  color: var(--color-accent);
}

/* 移动端适配 */
@media screen and (max-width: 640px) {
  .feed-box {
    padding: 0.9rem;
  }

  .feed-box__main {
    flex-direction: column;
    align-items: stretch;
    gap: 0.6rem;
    padding: 0.7rem;
  }

  .feed-box__actions {
    justify-content: flex-end;
  }

  .feed-preview-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
    padding: 0.6rem 0.4rem;
  }

  #content.feed-page .feed-preview-link,
  #content.feed-page .feed-preview-link:link,
  #content.feed-page .feed-preview-link:visited {
    white-space: normal;
  }
}