/* ===== 观察动态 · 杂志式内容流（.page-news） ===== */
.page-news {
  background-color: var(--color-bg);
  background-image:
    linear-gradient(rgba(46, 125, 50, 0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 125, 50, 0.16) 1px, transparent 1px);
  background-size: 44px 44px;
}

.page-news .breadcrumb {
  padding-top: 1rem;
}

/* 主题声明 */
.page-news .news-hero {
  padding: clamp(2rem, 6vw, 4rem) 0 clamp(1.5rem, 4vw, 3rem);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}
.page-news .news-hero::after {
  content: "";
  position: absolute;
  left: var(--container-pad);
  bottom: -1px;
  width: clamp(3rem, 10vw, 7rem);
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}
.page-news .news-hero h1 {
  font-family: var(--font-headline);
  font-weight: 300;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: 0.02em;
  margin: 0.75rem 0 1rem;
  max-width: 20em;
}
.page-news .news-lead-desc {
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 56ch;
  margin: 0;
}

/* 章节通用 */
.page-news .news-updates,
.page-news .news-categories,
.page-news .news-subscribe {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
}
.page-news .news-categories {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.page-news .news-updates h2,
.page-news .news-categories h2,
.page-news .news-subscribe h2 {
  font-family: var(--font-headline);
  font-weight: 400;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin: 0.5rem 0 1.5rem;
}
.page-news .section-index {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}
.page-news .section-index span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-gold);
  border: 1px solid rgba(212, 175, 55, 0.4);
  padding: 0.15rem 0.45rem;
}

/* 分类筛选 */
.page-news .news-filter {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}
.page-news .filter-input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
}
.page-news .filter-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--color-border);
  background: var(--color-panel);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.page-news .filter-label:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
}
.page-news .filter-input:focus-visible + .filter-label {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.page-news .filter-input:checked + .filter-label {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-bg);
}

/* 筛选隐藏规则 */
.page-news #news-filter-update:checked ~ .news-articles .news-card:not([data-cat="update"]),
.page-news #news-filter-report:checked ~ .news-articles .news-card:not([data-cat="report"]),
.page-news #news-filter-analysis:checked ~ .news-articles .news-card:not([data-cat="analysis"]) {
  display: none;
}

/* 文章网格 */
.page-news .news-articles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
}

/* 文章卡片 */
.page-news .news-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
  padding: 1.25rem;
  position: relative;
  transition: border-color var(--transition), transform var(--transition);
}
.page-news .news-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-3px);
}
.page-news .news-card.lead {
  padding: 0;
  overflow: hidden;
}
.page-news .news-card h3 {
  font-family: var(--font-headline);
  font-weight: 400;
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  line-height: 1.2;
  margin: 0 0 0.75rem;
}
.page-news .news-card .news-excerpt {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin: 0 0 0.5rem;
}

/* 编号与标签 */
.page-news .news-index {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
  margin: 0 0 0.75rem;
}
.page-news .news-index > span {
  color: var(--color-accent);
  font-weight: 700;
  font-size: 0.9375rem;
}
.page-news .news-tag {
  font-style: normal;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  padding: 0.22rem 0.55rem;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}
.page-news .news-card[data-cat="update"] .news-tag {
  color: var(--color-gold);
  border-color: rgba(212, 175, 55, 0.45);
}
.page-news .news-card[data-cat="report"] .news-tag {
  color: var(--color-accent);
  border-color: rgba(118, 255, 3, 0.4);
}
.page-news .news-card[data-cat="analysis"] .news-tag {
  color: var(--color-primary);
  border-color: rgba(0, 200, 83, 0.45);
}

/* 卡片媒体 */
.page-news .news-card-media {
  width: 100%;
}
.page-news .news-card:not(.lead) .news-card-media {
  margin-bottom: 0.75rem;
}
.page-news .news-card-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-news .news-card.lead .news-card-body {
  order: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 1.5rem;
  width: 100%;
}
.page-news .news-card.lead .news-card-media {
  order: 1;
  position: relative;
  width: 100%;
  min-height: 240px;
  overflow: hidden;
}
.page-news .news-card.lead .news-card-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 摘要展开 */
.page-news .news-card .news-details {
  margin-top: auto;
  width: 100%;
  border-top: 1px dashed var(--color-border);
  padding-top: 0.65rem;
}
.page-news .news-details summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--color-primary);
}
.page-news .news-details summary::-webkit-details-marker {
  display: none;
}
.page-news .news-details summary::before {
  content: "+";
}
.page-news .news-details[open] summary {
  color: var(--color-accent);
}
.page-news .news-details[open] summary::before {
  content: "−";
}
.page-news .news-details p {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  border-left: 2px solid var(--color-primary);
  padding-left: 0.9rem;
}

/* 按键提示 */
.page-news kbd {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.1rem 0.4rem;
  color: var(--color-text);
}

/* 卡片按钮 */
.page-news .news-more {
  margin-top: auto;
  align-self: flex-start;
}

/* 分类索引 */
.page-news .news-cat-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
}
.page-news .news-cat-block {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-primary);
  padding: 1.5rem;
}
.page-news .news-cat-block[data-cat-tone="report"] {
  border-top-color: var(--color-accent);
}
.page-news .news-cat-block[data-cat-tone="analysis"] {
  border-top-color: var(--color-gold);
}
.page-news .news-cat-block h3 {
  font-family: var(--font-headline);
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: 0.03em;
  margin: 0;
}
.page-news .news-cat-block ul {
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
}
.page-news .news-cat-block li {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--color-text-secondary);
  padding: 0.55rem 0;
  border-bottom: 1px dashed var(--color-border);
}
.page-news .news-cat-block li:last-child {
  border-bottom: 0;
}
.page-news .news-cat-block a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition);
}
.page-news .news-cat-block a:hover {
  color: var(--color-accent);
}
.page-news .news-cat-block .news-cat-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  border-top: 1px solid var(--color-border);
  padding-top: 0.75rem;
}
.page-news .news-cat-block .news-cat-link:hover {
  color: var(--color-accent);
}

/* 订阅引导 */
.page-news .news-subscribe-panel {
  position: relative;
  overflow: hidden;
  min-height: 280px;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}
.page-news .news-subscribe-panel > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}
.page-news .news-subscribe-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.9rem;
  max-width: 600px;
  padding: clamp(1.5rem, 4vw, 2.5rem);
}
.page-news .news-subscribe-content h3 {
  font-family: var(--font-headline);
  font-weight: 400;
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  line-height: 1.15;
  margin: 0;
}
.page-news .news-subscribe-content p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}
.page-news .news-subscribe-content .news-subscribe-note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: rgba(156, 179, 156, 0.75);
}
.page-news .news-subscribe-content .btn:active {
  transform: scale(0.98);
}

/* ===== 响应式增强 ===== */
@media (min-width: 640px) {
  .page-news .news-articles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-news .news-card.lead {
    grid-column: 1 / -1;
  }
}

@media (min-width: 768px) {
  .page-news .news-card.lead {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: stretch;
  }
  .page-news .news-card.lead .news-card-body {
    order: 1;
    padding: clamp(1.5rem, 3vw, 2.5rem);
  }
  .page-news .news-card.lead .news-card-media {
    order: 2;
    min-height: 100%;
  }
  .page-news .news-cat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .page-news .news-articles {
    gap: 2rem;
  }
  .page-news .news-filter {
    margin-bottom: 2.25rem;
  }
}