/* ===== page-news 专属样式 ===== */
.page-news {
  --news-sidebar-width: 280px;
  --news-gap: 32px;
  --news-card-radius: 18px;
  --news-line-deco: 4px;
  --news-tag-gap: 10px;
  --news-transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 面包屑 */
.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px var(--container-padding) 0;
  max-width: var(--container-max);
  margin: 0 auto;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.page-news .breadcrumb a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-news .breadcrumb a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

.page-news .breadcrumb-sep {
  color: var(--color-line);
  font-weight: 700;
  margin: 0 2px;
}

.page-news .breadcrumb-current {
  color: var(--color-text-heading);
  font-weight: 400;
}

/* 页面标题区 */
.page-news .page-header {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 20px var(--container-padding) 12px;
}

.page-news .page-heading {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text-heading);
  margin: 0 0 6px;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.page-news .page-subtitle {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 300;
  color: var(--color-text-muted);
  margin: 0 0 16px;
  letter-spacing: 0.04em;
}

.page-news .page-divider {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin: 0 0 8px;
  -o-object-fit: cover;
     object-fit: cover;
}

/* 隐藏radio */
.page-news .tag-radio {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

/* 内容布局：侧边栏 + 主内容 */
.page-news .content-layout {
  display: flex;
  flex-direction: column;
  gap: var(--news-gap);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding) 40px;
}

/* 侧边栏 */
.page-news .sidebar {
  flex: 0 0 auto;
  width: 100%;
}

.page-news .sidebar .section-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-heading);
  margin: 0 0 16px;
  padding-left: 14px;
  border-left: 3px solid var(--color-line);
  letter-spacing: 0.03em;
}

.page-news .tag-section {
  background: var(--color-card-bg);
  border-radius: var(--radius-md);
  padding: 22px 20px 20px;
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.page-news .tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--news-tag-gap);
  position: relative;
  z-index: 1;
}

.page-news .tag-label {
  display: inline-block;
  padding: 8px 18px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-body);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 100px;
  cursor: pointer;
  transition: all var(--transition-fast);
  -webkit-user-select: none;
     -moz-user-select: none;
          user-select: none;
  letter-spacing: 0.02em;
}

.page-news .tag-label:hover {
  background: rgba(255, 111, 0, 0.15);
  border-color: var(--color-accent);
  color: var(--color-accent-light);
  box-shadow: 0 0 12px rgba(255, 111, 0, 0.12);
}

/* 选中标签高亮：radio:checked + label */
.page-news #tf-all:checked ~ .content-layout .tag-cloud label[for="tf-all"],
.page-news #tf-redyellow:checked ~ .content-layout .tag-cloud label[for="tf-redyellow"],
.page-news #tf-timeline:checked ~ .content-layout .tag-cloud label[for="tf-timeline"],
.page-news #tf-switch:checked ~ .content-layout .tag-cloud label[for="tf-switch"],
.page-news #tf-android:checked ~ .content-layout .tag-cloud label[for="tf-android"],
.page-news #tf-data:checked ~ .content-layout .tag-cloud label[for="tf-data"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 0 20px rgba(255, 111, 0, 0.25);
}

.page-news .tag-bg {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin-top: 20px;
  border-radius: var(--radius-sm);
  opacity: 0.6;
  -o-object-fit: cover;
     object-fit: cover;
}

/* 主内容区 */
.page-news .main-content {
  flex: 1;
  min-width: 0;
}

.page-news .main-content .section-title {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text-heading);
  margin: 0 0 20px;
  padding-left: 14px;
  border-left: 3px solid var(--color-line);
  letter-spacing: 0.03em;
}

/* 文章列表 */
.page-news .article-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-news .article-item {
  display: flex;
  flex-direction: row;
  gap: 16px;
  background: var(--color-card-bg);
  border-radius: var(--news-card-radius);
  padding: 20px 20px 20px 24px;
  border: 1px solid var(--color-card-border);
  border-left: var(--news-line-deco) solid var(--color-line);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
}

.page-news .article-item:hover {
  border-color: rgba(255, 111, 0, 0.35);
  box-shadow: 0 6px 28px rgba(0, 0, 0, 0.45);
}

.page-news .article-text {
  flex: 1;
  min-width: 0;
}

.page-news .article-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-heading);
  margin: 0 0 8px;
  line-height: 1.3;
  transition: color var(--transition-fast);
}

.page-news .article-item:hover .article-title {
  color: var(--color-accent-light);
}

.page-news .article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.page-news .article-tag {
  display: inline-block;
  padding: 3px 12px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 400;
  color: var(--color-accent-light);
  background: rgba(255, 111, 0, 0.10);
  border-radius: 100px;
  letter-spacing: 0.02em;
}

.page-news .article-date {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.page-news .article-summary {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 300;
  color: var(--color-text-body);
  line-height: 1.65;
  margin: 0 0 12px;
  max-width: 620px;
}

.page-news .article-summary-extra {
  display: inline;
  opacity: 0;
  max-height: 0;
  transition: opacity 0.4s ease, max-height 0.4s ease;
  overflow: hidden;
}

.page-news .article-item:hover .article-summary-extra {
  opacity: 1;
  max-height: 120px;
}

.page-news .article-link {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-link);
  text-decoration: none;
  padding: 4px 0 2px;
  border-bottom: 1px solid transparent;
  transition: all var(--transition-fast);
  letter-spacing: 0.02em;
}

.page-news .article-link:hover {
  color: var(--color-link-hover);
  border-bottom-color: var(--color-link-hover);
}

.page-news .article-img {
  flex: 0 0 150px;
  width: 150px;
  height: 100px;
  border-radius: var(--radius-sm);
  -o-object-fit: cover;
     object-fit: cover;
  background: var(--color-bg-start);
  align-self: flex-start;
  margin-top: 2px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.page-news .article-item:hover .article-img {
  transform: scale(1.02);
  box-shadow: 0 0 16px rgba(255, 111, 0, 0.09);
}

/* 标签筛选：纯CSS radio控制文章显示 */
.page-news #tf-all:checked ~ .content-layout .article-item {
  display: flex;
}

.page-news #tf-redyellow:checked ~ .content-layout .article-item[data-tags~="redyellow"] {
  display: flex;
}
.page-news #tf-redyellow:checked ~ .content-layout .article-item:not([data-tags~="redyellow"]) {
  display: none;
}

.page-news #tf-timeline:checked ~ .content-layout .article-item[data-tags~="timeline"] {
  display: flex;
}
.page-news #tf-timeline:checked ~ .content-layout .article-item:not([data-tags~="timeline"]) {
  display: none;
}

.page-news #tf-switch:checked ~ .content-layout .article-item[data-tags~="switch"] {
  display: flex;
}
.page-news #tf-switch:checked ~ .content-layout .article-item:not([data-tags~="switch"]) {
  display: none;
}

.page-news #tf-android:checked ~ .content-layout .article-item[data-tags~="android"] {
  display: flex;
}
.page-news #tf-android:checked ~ .content-layout .article-item:not([data-tags~="android"]) {
  display: none;
}

.page-news #tf-data:checked ~ .content-layout .article-item[data-tags~="data"] {
  display: flex;
}
.page-news #tf-data:checked ~ .content-layout .article-item:not([data-tags~="data"]) {
  display: none;
}

/* 推荐阅读区域 */
.page-news .recommended-section {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding) 60px;
  position: relative;
}

.page-news .recommended-section .section-title {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text-heading);
  margin: 0 0 24px;
  padding-left: 14px;
  border-left: 3px solid var(--color-line);
  letter-spacing: 0.03em;
}

.page-news .recommended-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  position: relative;
  z-index: 1;
}

.page-news .recommended-card {
  background: var(--color-card-bg);
  border-radius: var(--radius-md);
  padding: 22px 24px 24px;
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-card);
  transition: transform var(--news-transition), box-shadow var(--news-transition), border-color var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-news .recommended-card:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 36px rgba(0, 0, 0, 0.45);
  border-color: rgba(255, 111, 0, 0.25);
}

.page-news .recommended-title {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text-heading);
  margin: 0;
  line-height: 1.3;
  transition: color var(--transition-fast);
}

.page-news .recommended-card:hover .recommended-title {
  color: var(--color-accent-light);
}

.page-news .recommended-summary {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 300;
  color: var(--color-text-body);
  line-height: 1.6;
  margin: 0;
}

.page-news .recommended-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.page-news .recommended-decor {
  position: absolute;
  right: 16px;
  bottom: 10px;
  width: 200px;
  height: 200px;
  border-radius: var(--radius-lg);
  opacity: 0.30;
  pointer-events: none;
  -o-object-fit: cover;
     object-fit: cover;
  z-index: 0;
}

/* ===== 移动端优先（默认已适配） ===== */
@media (max-width: 639px) {
  .page-news .page-heading {
    font-size: 26px;
  }

  .page-news .page-subtitle {
    font-size: 14px;
  }

  .page-news .article-item {
    flex-direction: column;
    padding: 16px 16px 16px 20px;
  }

  .page-news .article-img {
    flex: 0 0 auto;
    width: 100%;
    height: 120px;
    order: -1;
    border-radius: var(--radius-sm);
  }

  .page-news .tag-section {
    padding: 18px 14px 16px;
  }

  .page-news .tag-label {
    font-size: 13px;
    padding: 6px 14px;
  }

  .page-news .recommended-card {
    padding: 18px 18px 20px;
  }

  .page-news .recommended-decor {
    width: 100px;
    height: 100px;
    right: 8px;
    bottom: 6px;
  }

  .page-news .sidebar .section-title,
  .page-news .main-content .section-title,
  .page-news .recommended-section .section-title {
    font-size: 18px;
  }
}

/* ===== 平板及以上 ===== */
@media (min-width: 640px) {
  .page-news .page-heading {
    font-size: 32px;
  }

  .page-news .content-layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-news .sidebar {
    width: var(--news-sidebar-width);
    position: sticky;
    top: calc(var(--header-height) + 20px);
  }

  .page-news .main-content {
    flex: 1;
  }

  .page-news .recommended-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-news .recommended-decor {
    width: 160px;
    height: 160px;
  }
}

/* ===== 桌面宽屏 ===== */
@media (min-width: 1024px) {
  .page-news .article-item {
    padding: 24px 24px 24px 28px;
  }

  .page-news .article-title {
    font-size: 20px;
  }

  .page-news .article-summary {
    font-size: 16px;
  }

  .page-news .recommended-list {
    gap: 24px;
  }

  .page-news .recommended-card {
    padding: 26px 28px 28px;
  }
}

/* ===== 大型桌面 ===== */
@media (min-width: 1280px) {
  .page-news .recommended-decor {
    width: 200px;
    height: 200px;
  }
}