/* =========================================================
   page-news 行业观察页面专属样式
   作用域限定：.page-news
   移动端优先 + 桌面端强化
   ========================================================= */

/* --- 布局容器 --- */
.page-news {
  --news-sidebar-w: 240px;
  --news-card-radius: 4px;
  --news-clip-offset: 18px;
  --news-transition: var(--transition-med, 0.35s);
}

.page-news__split {
  display: flex;
  flex-direction: column;
  max-width: var(--site-max-width, 1280px);
  margin: 0 auto;
  min-height: 70vh;
}

/* --- 左侧栏 --- */
.page-news__sidebar {
  background-color: var(--color-primary, #0A1F44);
  color: var(--color-white, #FFFFFF);
  padding: 2rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.page-news__sidebar::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: 0;
  width: 80px;
  height: 80px;
  background: var(--color-accent, #39FF14);
  clip-path: polygon(100% 0, 0 100%, 100% 100%);
  opacity: 0.15;
}

.page-news__sidebar-sticky {
  position: relative;
  z-index: 1;
}

/* 竖排主标题 */
.page-news__heading {
  font-family: var(--font-heading, sans-serif);
  font-weight: 900;
  font-style: italic;
  font-size: 2.8rem;
  line-height: 1.1;
  color: var(--color-white, #FFFFFF);
  margin: 0 0 0.5rem;
  letter-spacing: 0.06em;
  text-shadow: 2px 2px 0 rgba(57, 255, 20, 0.3);
}

.page-news__subtitle {
  font-family: var(--font-body, sans-serif);
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 1.5;
  color: var(--color-silver, #C0C0C0);
  margin: 0 0 2rem;
  padding-left: 0.25rem;
  border-left: 2px solid var(--color-accent, #39FF14);
  padding-left: 0.75rem;
}

/* --- 分类筛选 --- */
.page-news__radio {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.page-news__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.page-news__filter {
  display: inline-block;
  font-family: var(--font-mono, monospace);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  padding: 0.4rem 1rem;
  border: 1px solid var(--color-silver, #C0C0C0);
  color: var(--color-silver, #C0C0C0);
  background: transparent;
  cursor: pointer;
  transition: background var(--transition-fast, 0.2s), color var(--transition-fast, 0.2s), border-color var(--transition-fast, 0.2s);
  user-select: none;
}

.page-news__filter:hover {
  border-color: var(--color-accent, #39FF14);
  color: var(--color-accent, #39FF14);
}

/* 选中态：用兄弟选择器驱动 */
#news-all:checked ~ .page-news__split label[for="news-all"],
#news-trend:checked ~ .page-news__split label[for="news-trend"],
#news-resource:checked ~ .page-news__split label[for="news-resource"],
#news-member:checked ~ .page-news__split label[for="news-member"] {
  background: var(--color-accent, #39FF14);
  color: var(--color-primary, #0A1F44);
  border-color: var(--color-accent, #39FF14);
  font-weight: 700;
}

.page-news__sidebar-footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(192, 192, 192, 0.2);
}

.page-news__sidebar-tagline {
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  color: rgba(192, 192, 192, 0.6);
  letter-spacing: 0.1em;
}

/* --- 右侧内容 --- */
.page-news__content {
  flex: 1;
  padding: 1.5rem 1rem;
  background: var(--color-white, #FFFFFF);
}

.page-news__section-title {
  font-family: var(--font-heading, sans-serif);
  font-weight: 800;
  font-style: italic;
  font-size: 1.6rem;
  color: var(--color-primary, #0A1F44);
  margin-bottom: 1.5rem;
}

/* --- 卡片网格 --- */
.page-news__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

/* --- 单张卡片 --- */
.page-news__card {
  display: flex;
  flex-direction: column;
  background: var(--color-white, #FFFFFF);
  border: 1px solid var(--color-silver, #C0C0C0);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--news-clip-offset)), calc(100% - var(--news-clip-offset)) 100%, 0 100%);
  transition: transform var(--news-transition), box-shadow var(--news-transition), border-color var(--news-transition);
  overflow: hidden;
  position: relative;
}

/* 斜切角补充：右下角切点视觉强调 */
.page-news__card::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: 0;
  width: var(--news-clip-offset);
  height: var(--news-clip-offset);
  background: var(--color-accent, #39FF14);
  opacity: 0;
  transition: opacity var(--news-transition);
  clip-path: polygon(100% 0, 0 100%, 100% 100%);
}

.page-news__card:hover::after {
  opacity: 0.3;
}

/* 悬停上浮 */
.page-news__card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(10, 31, 68, 0.12);
  border-color: var(--color-accent, #39FF14);
}

/* 卡片图片 */
.page-news__card-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 400 / 250;
  background: var(--color-light, #F5F5F5);
}

.page-news__card-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--news-transition);
}

.page-news__card:hover .page-news__card-img {
  transform: scale(1.04);
}

/* 卡片文字区 */
.page-news__card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.page-news__card-tag {
  display: inline-block;
  font-family: var(--font-mono, monospace);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent, #39FF14);
  background: rgba(57, 255, 20, 0.08);
  padding: 0.2rem 0.6rem;
  align-self: flex-start;
  border: 1px solid rgba(57, 255, 20, 0.15);
}

.page-news__card-title {
  font-family: var(--font-heading, sans-serif);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.3;
  color: var(--color-primary, #0A1F44);
  margin: 0;
}

.page-news__card-text {
  font-family: var(--font-body, sans-serif);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-text, #2C2C2C);
  margin: 0;
  flex: 1;
}

.page-news__card-link {
  font-family: var(--font-mono, monospace);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary, #0A1F44);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast, 0.2s), border-color var(--transition-fast, 0.2s);
  align-self: flex-start;
  margin-top: 0.25rem;
}

.page-news__card-link:hover {
  color: var(--color-accent, #39FF14);
  border-bottom-color: var(--color-accent, #39FF14);
}

/* --- 分类筛选逻辑 --- */
#news-all:checked ~ .page-news__split .page-news__card {
  display: flex;
}

#news-trend:checked ~ .page-news__split .page-news__card[data-category="trend"] {
  display: flex;
}

#news-trend:checked ~ .page-news__split .page-news__card:not([data-category="trend"]) {
  display: none;
}

#news-resource:checked ~ .page-news__split .page-news__card[data-category="resource"] {
  display: flex;
}

#news-resource:checked ~ .page-news__split .page-news__card:not([data-category="resource"]) {
  display: none;
}

#news-member:checked ~ .page-news__split .page-news__card[data-category="member"] {
  display: flex;
}

#news-member:checked ~ .page-news__split .page-news__card:not([data-category="member"]) {
  display: none;
}

/* --- 更新说明归档 --- */
.page-news__archive {
  position: relative;
  margin: 2.5rem 0 1.5rem;
  background: var(--color-light, #F5F5F5);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-news__archive-bg {
  position: absolute;
  inset: 0;
  opacity: 0.12;
  overflow: hidden;
}

.page-news__archive-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-news__archive-content {
  position: relative;
  z-index: 1;
  padding: 2rem 1.5rem;
}

.page-news__archive-title {
  font-family: var(--font-heading, sans-serif);
  font-weight: 800;
  font-style: italic;
  font-size: 1.6rem;
  color: var(--color-primary, #0A1F44);
  margin: 0 0 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-accent, #39FF14);
  display: inline-block;
}

.page-news__archive-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-news__archive-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--color-white, #FFFFFF);
  border-left: 3px solid var(--color-accent, #39FF14);
  transition: transform var(--transition-fast, 0.2s), box-shadow var(--transition-fast, 0.2s);
}

.page-news__archive-item:hover {
  transform: translateX(4px);
  box-shadow: 0 2px 12px rgba(10, 31, 68, 0.08);
}

.page-news__archive-badge {
  flex-shrink: 0;
  font-family: var(--font-mono, monospace);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  background: var(--color-primary, #0A1F44);
  color: var(--color-white, #FFFFFF);
  border: 1px solid var(--color-primary, #0A1F44);
  line-height: 1.4;
}

.page-news__archive-text {
  font-family: var(--font-body, sans-serif);
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--color-text, #2C2C2C);
}

.page-news__archive-note {
  font-family: var(--font-body, sans-serif);
  font-size: 0.8rem;
  color: var(--color-text-light, #555);
  margin: 0.5rem 0 0;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-silver, #C0C0C0);
}

/* --- 底部装饰 --- */
.page-news__bottom-deco {
  margin-top: 2rem;
  overflow: hidden;
  line-height: 0;
}

.page-news__deco-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 150px;
  object-fit: cover;
  opacity: 0.7;
}

/* =========================================================
   桌面端（≥768px）
   ========================================================= */
@media (min-width: 768px) {
  .page-news__split {
    flex-direction: row;
    align-items: stretch;
  }

  .page-news__sidebar {
    width: var(--news-sidebar-w);
    flex-shrink: 0;
    padding: 3rem 1.75rem;
    position: relative;
  }

  .page-news__sidebar-sticky {
    position: sticky;
    top: calc(var(--header-height, 64px) + 2rem);
  }

  .page-news__heading {
    font-size: 2.4rem;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
    min-height: 280px;
  }

  .page-news__subtitle {
    font-size: 0.85rem;
    margin-bottom: 2.5rem;
    border-left: none;
    border-top: 2px solid var(--color-accent, #39FF14);
    padding-left: 0;
    padding-top: 0.75rem;
  }

  .page-news__filters {
    flex-direction: column;
    gap: 0.4rem;
  }

  .page-news__filter {
    font-size: 0.75rem;
    padding: 0.35rem 0.8rem;
    width: 100%;
    text-align: left;
  }

  .page-news__sidebar-footer {
    margin-top: 3rem;
  }

  .page-news__content {
    flex: 1;
    padding: 2.5rem 2rem;
    min-width: 0;
  }

  .page-news__grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.75rem;
  }

  /* 错位效果：偶数卡片上移 */
  .page-news__grid .page-news__card:nth-child(even) {
    transform: translateY(2rem);
  }

  .page-news__grid .page-news__card:nth-child(even):hover {
    transform: translateY(calc(2rem - 6px));
  }

  .page-news__card-body {
    padding: 1.5rem;
  }

  .page-news__archive-list {
    grid-template-columns: 1fr 1fr;
  }

  .page-news__archive-content {
    padding: 2.5rem 2rem;
  }

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

/* =========================================================
   宽屏（≥1024px）
   ========================================================= */
@media (min-width: 1024px) {
  .page-news__sidebar {
    width: 260px;
    padding: 4rem 2rem;
  }

  .page-news__heading {
    font-size: 2.8rem;
    min-height: 320px;
  }

  .page-news__content {
    padding: 3rem 2.5rem;
  }

  .page-news__grid {
    gap: 2rem;
  }

  .page-news__card-title {
    font-size: 1.2rem;
  }

  .page-news__archive-content {
    padding: 3rem 2.5rem;
  }
}

/* =========================================================
   辅助类：仅屏幕阅读器可见
   ========================================================= */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}