/* ===== 新闻动态页 · 页面专属 CSS ===== */
.page-news {
  --pn-max: var(--tb-container);
  --pn-pad: clamp(16px, 4vw, 40px);
  --pn-gap: 20px;
  background-color: var(--tb-bg);
  color: var(--tb-text);
  font-family: var(--tb-font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

.page-news img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-news [id] {
  scroll-margin-top: 72px;
}

.page-news a:focus-visible,
.page-news .tb-tabs__btn:focus-visible {
  outline: 3px solid var(--tb-blue);
  outline-offset: 2px;
}

/* ---------- 面包屑 ---------- */
.page-news .pn-breadcrumb {
  max-width: var(--pn-max);
  margin: 0 auto;
  padding: 16px var(--pn-pad) 0;
  font-size: 0.85rem;
  color: var(--tb-text-dim);
}

.page-news .pn-breadcrumb a {
  color: var(--tb-blue);
  text-decoration: none;
}

.page-news .pn-breadcrumb a:hover {
  text-decoration: underline;
}

/* ---------- 标题区 ---------- */
.page-news .pn-hero {
  position: relative;
  max-width: var(--pn-max);
  margin: 0 auto;
  padding: 28px var(--pn-pad) 36px;
  display: flex;
  align-items: flex-end;
  gap: 24px;
  flex-wrap: wrap;
}

.page-news .pn-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: var(--pn-pad);
  width: 72%;
  height: 4px;
  background: var(--tb-grad-main);
  clip-path: polygon(0 0, 100% 0, calc(100% - 20px) 100%, 0 100%);
}

.page-news .pn-hero__text {
  flex: 1 1 320px;
  max-width: 760px;
}

.page-news .pn-hero h1 {
  font-family: var(--tb-font-head);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 3.6rem);
  line-height: 1.04;
  margin: 6px 0 12px;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.page-news .pn-hero__lead {
  color: var(--tb-text-dim);
  font-size: 0.95rem;
  margin: 0;
  max-width: 60ch;
}

.page-news .pn-hero__deco {
  display: none;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  margin-left: auto;
}

.page-news .pn-hero__stripe {
  display: block;
  width: 54px;
  height: 54px;
  background: var(--tb-grad-accent);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), 0 100%);
  box-shadow: var(--tb-shadow-sm);
}

.page-news .pn-hero__num {
  font-family: var(--tb-font-data);
  font-size: 3.6rem;
  line-height: 1;
  color: var(--tb-border-strong);
  font-weight: 700;
}

/* ---------- 章节头 ---------- */
.page-news .pn-section-head {
  margin-bottom: 24px;
}

/* ---------- 精选区 ---------- */
.page-news .pn-featured {
  max-width: var(--pn-max);
  margin: 0 auto;
  padding: 24px var(--pn-pad) 32px;
}

.page-news .pn-featured__grid {
  display: grid;
  gap: var(--pn-gap);
}

.page-news .pn-featured__main,
.page-news .pn-featured__side {
  display: flex;
  flex-direction: column;
  border: 2px solid var(--tb-border-strong);
  background: var(--tb-bg-card);
  box-shadow: var(--tb-shadow-sm);
  overflow: hidden;
  transition: transform 0.25s ease-out, box-shadow 0.25s ease-out, border-color 0.25s ease-out;
}

.page-news .pn-featured__main:hover,
.page-news .pn-featured__side:hover {
  transform: translateY(-4px);
  box-shadow: var(--tb-shadow);
  border-color: var(--tb-blue);
}

.page-news .pn-featured__media {
  overflow: hidden;
}

.page-news .pn-featured__media img {
  width: 100%;
  object-fit: cover;
  transition: transform 0.35s ease-out;
}

.page-news .pn-featured__main .pn-featured__media img {
  aspect-ratio: 2 / 1;
  min-height: 200px;
}

.page-news .pn-featured__side .pn-featured__media img {
  aspect-ratio: 3 / 2;
}

.page-news .pn-featured__main:hover img,
.page-news .pn-featured__side:hover img {
  transform: scale(1.03);
}

.page-news .pn-featured__body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.page-news .pn-featured__body h3,
.page-news .pn-article__content h3 {
  font-family: var(--tb-font-head);
  font-weight: 700;
  font-size: 1.35rem;
  line-height: 1.2;
  margin: 0;
}

.page-news .pn-featured__body p,
.page-news .pn-article__content p {
  margin: 0;
  color: var(--tb-text-dim);
  font-size: 0.9rem;
}

.page-news .pn-featured__meta,
.page-news .pn-article__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.page-news .pn-meta-time {
  font-size: 0.8rem;
  color: var(--tb-text-dim);
  font-family: var(--tb-font-data);
  letter-spacing: 0.02em;
}

.page-news .pn-featured__actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
  padding-top: 8px;
}

.page-news .pn-btn-sm {
  padding: 8px 14px;
  font-size: 0.85rem;
}

/* ---------- 文章流区 ---------- */
.page-news .pn-stream {
  background: linear-gradient(180deg, rgba(0, 212, 255, 0.05), transparent 140px);
  padding: 36px 0 24px;
}

.page-news .pn-stream__inner {
  max-width: var(--pn-max);
  margin: 0 auto;
  padding: 0 var(--pn-pad);
}

.page-news .pn-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 12px;
  margin-bottom: 24px;
  scrollbar-width: thin;
}

.page-news .pn-tabs .tb-tabs__btn {
  flex: 0 0 auto;
}

.page-news .pn-tabs .tb-tabs__btn[aria-selected="true"] {
  background: var(--tb-grad-main);
  color: var(--tb-bg);
  border-color: transparent;
  box-shadow: var(--tb-shadow-sm);
  font-weight: 700;
}

.page-news .pn-article-list {
  display: grid;
  gap: 18px;
}

.page-news .pn-article {
  border: 1px solid var(--tb-border-fine);
  background: var(--tb-bg-card);
  overflow: hidden;
  transition: transform 0.25s ease-out, box-shadow 0.25s ease-out, border-color 0.25s ease-out;
}

.page-news .pn-article--media {
  display: grid;
}

.page-news .pn-article__media {
  overflow: hidden;
}

.page-news .pn-article__media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.35s ease-out;
}

.page-news .pn-article:hover {
  transform: translateY(-3px);
  box-shadow: var(--tb-shadow-sm);
  border-color: var(--tb-border-strong);
}

.page-news .pn-article:hover .pn-article__media img {
  transform: scale(1.03);
}

.page-news .pn-article__content {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-news .pn-article__content h3 {
  font-size: 1.15rem;
}

.page-news .pn-article__tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  padding-top: 4px;
}

.page-news .pn-article__tags a {
  color: var(--tb-blue);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.85rem;
}

.page-news .pn-article__tags a::after {
  content: " →";
}

.page-news .pn-article--text {
  display: grid;
  grid-template-columns: 52px 1fr;
  align-items: stretch;
  border-left: 4px solid var(--tb-blue);
}

.page-news .pn-article__index {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 20px;
  font-family: var(--tb-font-data);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--tb-border-strong);
  background: linear-gradient(180deg, rgba(0, 212, 255, 0.06), transparent);
}

/* ---------- 热门标签云 ---------- */
.page-news .pn-tagzone {
  max-width: var(--pn-max);
  margin: 0 auto;
  padding: 32px var(--pn-pad) 48px;
}

.page-news .pn-tagcloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  justify-content: center;
  align-items: center;
  padding: clamp(20px, 5vw, 44px);
  border: 2px solid var(--tb-border-strong);
  background:
    linear-gradient(var(--tb-border-fine) 1px, transparent 1px) 0 0 / 32px 32px,
    linear-gradient(90deg, var(--tb-border-fine) 1px, transparent 1px) 0 0 / 32px 32px,
    var(--tb-bg-card);
  box-shadow: var(--tb-shadow);
}

.page-news .pn-tagcloud a.tb-tag {
  text-decoration: none;
  background: var(--tb-bg-panel);
  border: 1px solid var(--tb-border-strong);
  color: var(--tb-text);
  box-shadow: var(--tb-shadow-sm);
  transition: transform 0.2s ease-out, border-color 0.2s ease-out, color 0.2s ease-out;
}

.page-news .pn-tagcloud a.tb-tag:hover {
  transform: translateY(-2px) rotate(-1deg);
  border-color: var(--tb-blue);
  color: var(--tb-blue);
}

.page-news .pn-tagcloud .pn-tag--lg {
  font-size: 1.05rem;
  padding: 10px 18px;
  color: var(--tb-orange);
  border-color: var(--tb-orange);
}

.page-news .pn-tagcloud .pn-tag--md {
  font-size: 0.9rem;
  padding: 8px 14px;
}

.page-news .pn-tagcloud .pn-tag--sm {
  font-size: 0.78rem;
  padding: 6px 10px;
  color: var(--tb-text-dim);
}

/* ---------- 底部相关链接 ---------- */
.page-news .pn-crosslinks {
  border-top: 2px solid var(--tb-border-strong);
  border-bottom: 2px solid var(--tb-border-strong);
  background: var(--tb-bg-card);
  margin-top: 44px;
}

.page-news .pn-crosslinks__inner {
  max-width: var(--pn-max);
  margin: 0 auto;
  padding: 20px var(--pn-pad);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: center;
}

.page-news .pn-crosslinks a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--tb-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.88rem;
  padding: 10px 16px;
  border: 1px solid var(--tb-border-strong);
  background: var(--tb-bg-panel);
  box-shadow: var(--tb-shadow-sm);
  transition: border-color 0.2s ease-out, transform 0.2s ease-out, color 0.2s ease-out;
}

.page-news .pn-crosslinks a::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--tb-blue);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
  flex: 0 0 auto;
}

.page-news .pn-crosslinks a:hover {
  border-color: var(--tb-blue);
  color: var(--tb-blue);
  transform: translateY(-2px);
}

/* ---------- 桌面端布局 ---------- */
@media (min-width: 700px) {
  .page-news .pn-hero__deco {
    display: flex;
  }

  .page-news .pn-featured__grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-news .pn-featured__main {
    grid-column: 1 / -1;
  }

  .page-news .pn-article--media {
    grid-template-columns: 260px 1fr;
  }

  .page-news .pn-article--media .pn-article__media img {
    aspect-ratio: auto;
    height: 100%;
    min-height: 220px;
    object-fit: cover;
  }

  .page-news .pn-article--media.pn-article--flip .pn-article__media {
    order: 2;
  }

  .page-news .pn-article--media.pn-article--flip .pn-article__content {
    order: 1;
  }
}

@media (min-width: 980px) {
  .page-news .pn-featured__grid {
    grid-template-columns: 2fr 1fr;
    grid-template-rows: auto auto;
  }

  .page-news .pn-featured__main {
    grid-column: 1;
    grid-row: 1 / span 2;
  }

  .page-news .pn-featured__main .pn-featured__media {
    flex: 1;
    display: flex;
  }

  .page-news .pn-featured__main .pn-featured__media img {
    aspect-ratio: auto;
    min-height: 100%;
    height: 100%;
  }

  .page-news .pn-article--text {
    grid-template-columns: 72px 1fr;
  }

  .page-news .pn-article__index {
    font-size: 2rem;
    padding-top: 24px;
  }

  .page-news .pn-stream__inner {
    padding: 0 var(--pn-pad);
  }
}