/* ===== 新闻动态页面专属样式 ===== */
.page-news {
  position: relative;
  background: var(--color-obsidian);
  color: var(--color-off-white);
  overflow-x: clip;
}

/* 背景网格与氛围 */
.page-news__bg {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(74, 159, 245, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 159, 245, 0.055) 1px, transparent 1px),
    radial-gradient(ellipse 75% 45% at 82% 4%, rgba(74, 159, 245, 0.10), transparent 60%),
    radial-gradient(ellipse 45% 35% at 12% 58%, rgba(212, 168, 67, 0.06), transparent 55%);
  background-size: 44px 44px, 44px 44px, auto, auto;
  z-index: 0;
}

.page-news .container {
  position: relative;
  z-index: 1;
}

/* 面包屑 */
.page-news__crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted-gray);
}

.page-news__crumbs a {
  color: var(--color-electric-blue);
  text-decoration: none;
  transition: color 0.15s ease;
}

.page-news__crumbs a:hover {
  color: var(--color-gold-bright);
}

.page-news__crumbs-sep {
  color: var(--color-graphite);
}

/* 页头 */
.page-news__hero {
  padding-bottom: 40px;
}

.page-news__hero-main {
  display: grid;
  gap: 28px;
  padding-top: 28px;
  border-bottom: 1px solid var(--color-graphite);
}

.page-news__hero-copy .section-label {
  color: var(--color-gold);
  font-weight: 700;
}

.page-news__hero-copy h1 {
  margin: 12px 0 16px;
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
  max-width: 12em;
}

.page-news__lead {
  margin: 0;
  color: var(--color-muted-gray);
  font-size: 1rem;
  line-height: 1.9;
  max-width: 62em;
}

/* 分类标签 */
.page-news__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 2px;
}

.page-news__filter {
  display: inline-block;
  padding: 8px 20px;
  background: var(--color-carbon);
  border: 1px solid var(--color-graphite);
  color: var(--color-muted-gray);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  text-decoration: none;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.page-news__filter:hover,
.page-news__filter.is-active {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-obsidian);
}

/* 主内容：不对称瀑布流 */
.page-news__newsroom {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  padding: 40px 0;
}

/* 头条文章 */
.page-news__featured {
  position: relative;
  background: var(--color-carbon);
  border: 1px solid var(--color-graphite);
  border-top: 2px solid var(--color-gold);
  scroll-margin-top: 96px;
}

.page-news__featured-media {
  position: relative;
  overflow: hidden;
  background: var(--color-graphite);
}

.page-news__featured-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-news__media-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  display: inline-block;
  padding: 5px 14px;
  background: var(--color-gold);
  color: var(--color-obsidian);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}

.page-news__featured-body {
  padding: 24px 20px 28px;
}

.page-news__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin-bottom: 12px;
}

.page-news__tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(42, 109, 181, 0.18);
  border: 1px solid var(--color-tech-blue);
  color: var(--color-electric-blue);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-news__time {
  color: var(--color-muted-gray);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-news__featured-body h2 {
  margin: 12px 0 10px;
  font-size: 1.5rem;
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -0.01em;
  max-width: 26em;
}

.page-news__featured-excerpt {
  color: var(--color-muted-gray);
  line-height: 1.85;
  margin-bottom: 16px;
}

/* 展开阅读 */
.page-news__details {
  border-top: 1px solid var(--color-graphite);
  margin-top: 8px;
}

.page-news__details summary {
  cursor: pointer;
  list-style: none;
  padding: 14px 2px;
  color: var(--color-gold);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  transition: color 0.15s ease;
}

.page-news__details summary::-webkit-details-marker {
  display: none;
}

.page-news__details summary::after {
  content: "+";
  float: right;
  font-size: 18px;
  font-weight: 700;
}

.page-news__details[open] summary::after {
  content: "–";
}

.page-news__details summary:hover {
  color: var(--color-gold-bright);
}

.page-news__details-body {
  padding: 4px 2px 16px;
  color: var(--color-muted-gray);
  line-height: 1.85;
}

.page-news__details-body p + p {
  margin-top: 10px;
}

.page-news__details-body .btn {
  margin-top: 14px;
}

/* 新闻列表 */
.page-news__list {
  margin-top: 32px;
}

.page-news__list-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-muted-gray);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-graphite);
  margin: 0;
}

.page-news__item {
  position: relative;
  padding: 20px 0 20px 18px;
  border-bottom: 1px solid var(--color-graphite);
  scroll-margin-top: 96px;
}

.page-news__item-rail {
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 2px;
  background: var(--color-graphite);
  transition: width 0.18s ease, background 0.18s ease, top 0.18s ease, bottom 0.18s ease;
}

.page-news__item:hover .page-news__item-rail {
  width: 4px;
  top: 10px;
  bottom: 10px;
  background: var(--color-gold);
}

.page-news__item-body .page-news__meta {
  margin-bottom: 8px;
}

.page-news__item-body h3 {
  margin: 0 0 8px;
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.4;
  transition: color 0.15s ease;
}

.page-news__item:hover h3 {
  color: var(--color-gold-bright);
}

.page-news__item-body p {
  margin: 0 0 8px;
  color: var(--color-muted-gray);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-news__item-link {
  display: inline-block;
  color: var(--color-electric-blue);
  font-size: 0.875rem;
  text-decoration: none;
  font-family: var(--font-mono);
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
  margin-top: 2px;
}

.page-news__item-link:hover {
  color: var(--color-gold-bright);
  border-bottom-color: var(--color-gold);
}

.page-news__status {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--color-electric-blue);
}

/* 版本日志 */
.page-news__version {
  background: var(--color-carbon);
  border: 1px solid var(--color-graphite);
  padding: 24px 20px 20px;
  scroll-margin-top: 96px;
}

.page-news__version-head .section-label {
  color: var(--color-electric-blue);
  font-size: 12px;
}

.page-news__version-head h2 {
  margin: 8px 0 12px;
  font-size: 1.625rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-news__stable-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid rgba(57, 199, 106, 0.45);
  background: rgba(57, 199, 106, 0.1);
  color: var(--color-success);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
}

.page-news__stable-dot {
  width: 6px;
  height: 6px;
  background: var(--color-success);
  border-radius: 50%;
}

.page-news__timeline {
  list-style: none;
  margin: 24px 0 0 8px;
  padding: 0;
  border-left: 1px solid var(--color-graphite);
}

.page-news__tl-item {
  position: relative;
  padding: 0 0 24px 22px;
}

.page-news__tl-item:last-child {
  padding-bottom: 4px;
}

.page-news__tl-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--color-graphite);
  transform: rotate(45deg);
  transition: background 0.18s ease;
}

.page-news__tl-item--current::before {
  background: var(--color-gold);
}

.page-news__tl-badge {
  position: absolute;
  left: -13px;
  top: 0;
  display: inline-block;
  padding: 3px 8px;
  background: var(--color-graphite);
  color: var(--color-muted-gray);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.page-news__tl-item--current .page-news__tl-badge {
  background: var(--color-gold);
  color: var(--color-obsidian);
  font-weight: 700;
}

.page-news__tl-body h3 {
  margin: 2px 0 8px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-off-white);
}

.page-news__tl-item--current .page-news__tl-body h3 {
  color: var(--color-gold-bright);
}

.page-news__tl-body ul {
  margin: 0;
  padding-left: 16px;
  color: var(--color-muted-gray);
  font-size: 0.8125rem;
  line-height: 1.7;
}

.page-news__tl-body li + li {
  margin-top: 4px;
}

/* 版本侧边视觉 */
.page-news__side-visual {
  margin: 20px 0 0;
  background: var(--color-carbon);
  border: 1px solid var(--color-graphite);
  overflow: hidden;
}

.page-news__side-visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-news__side-visual figcaption {
  padding: 12px 14px;
  color: var(--color-muted-gray);
  font-family: var(--font-mono);
  font-size: 12px;
  border-top: 1px solid var(--color-graphite);
}

/* 专题系列 */
.page-news__series {
  padding: 40px 0 72px;
  scroll-margin-top: 96px;
}

.page-news__series-head {
  display: grid;
  gap: 8px;
  margin-bottom: 28px;
}

.page-news__series-head .section-label {
  color: var(--color-gold);
}

.page-news__series-head h2 {
  margin: 6px 0 0;
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-news__series-intro {
  margin: 0;
  color: var(--color-muted-gray);
  line-height: 1.8;
  max-width: 46em;
}

.page-news__series-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-news__series-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--color-carbon);
  border: 1px solid var(--color-graphite);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-news__series-card::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, transparent 14px, var(--color-graphite) 14px);
  transition: background 0.2s ease;
  pointer-events: none;
  z-index: 2;
}

.page-news__series-card:hover {
  background: var(--color-graphite);
  border-color: rgba(212, 168, 67, 0.45);
}

.page-news__series-card:hover::after {
  background: linear-gradient(135deg, transparent 20px, var(--color-gold) 20px);
}

.page-news__series-media {
  overflow: hidden;
  background: var(--color-graphite);
}

.page-news__series-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.page-news__series-card:hover .page-news__series-media img {
  transform: scale(1.03);
}

.page-news__series-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 18px 18px 22px;
}

.page-news__series-body .page-news__tag {
  align-self: flex-start;
  margin-bottom: 10px;
}

.page-news__series-body h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  line-height: 1.4;
}

.page-news__series-body > p {
  margin: 0 0 16px;
  color: var(--color-muted-gray);
  font-size: 0.875rem;
  line-height: 1.75;
  flex-grow: 1;
}

.page-news__series-body .btn {
  align-self: flex-start;
}

/* 平板及以上：新闻列表双列、专题双列 + 第三张跨行 */
@media (min-width: 720px) {
  .page-news__featured-body {
    padding: 28px 28px 32px;
  }

  .page-news__series-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-news__series-card:last-child {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
  }

  .page-news__series-card:last-child .page-news__series-media img {
    height: 100%;
    object-fit: cover;
  }
}

/* 桌面：不对称分屏与三列专题区 */
@media (min-width: 1024px) {
  .page-news__newsroom {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 28px;
    align-items: start;
    padding: 56px 0;
  }

  .page-news__series-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-news__lead {
    font-size: 1.0625rem;
  }

  .page-news__featured-body h2 {
    font-size: 1.75rem;
  }
}