.page-news {
  --news-gold: #F2C14E;
  --news-purple: #7B2FBE;
  --news-indigo: #3D2C8D;
  --news-deep: #060A18;
  --news-text: #E6E8EF;
  --news-muted: #8892B0;
  --news-line: rgba(230, 232, 239, 0.12);
  --news-line-strong: rgba(230, 232, 239, 0.24);
  --news-line-gold: rgba(242, 193, 78, 0.3);
  position: relative;
}

/* ========== 页头 ========== */
.page-news__header {
  position: relative;
  padding: 2.75rem 0 2.25rem;
  border-bottom: 1px solid var(--news-line);
}

.page-news__header::after {
  content: '';
  position: absolute;
  top: -1px;
  right: 0;
  width: 220px;
  height: 100%;
  background: repeating-linear-gradient(135deg,
    rgba(123, 47, 190, 0.14) 0,
    rgba(123, 47, 190, 0.14) 2px,
    transparent 2px,
    transparent 12px);
  clip-path: polygon(100% 0, 100% 100%, 42% 100%, 68% 0);
  pointer-events: none;
}

.page-news__header .section-label {
  position: relative;
  margin-bottom: 0.75rem;
}

.page-news__header .page-header__title {
  position: relative;
  max-width: 780px;
  margin-bottom: 0.75rem;
  font-size: clamp(1.45rem, 3.2vw, 2.35rem);
  line-height: 1.18;
}

.page-news__header .page-header__summary {
  position: relative;
  max-width: 680px;
  margin-top: 0.75rem;
  color: var(--news-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-news .breadcrumb {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.25rem;
  color: var(--news-muted);
  font-size: 0.8rem;
}

.page-news .breadcrumb a {
  color: var(--news-muted);
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  color: var(--news-gold);
}

.page-news__diamond {
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 0.55rem;
  background: var(--news-gold);
  transform: rotate(45deg);
  box-shadow: 0 0 10px rgba(242, 193, 78, 0.6);
}

/* ========== 主布局 ========== */
.page-news__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  padding: 2rem 0 4rem;
}

.page-news__sidebar {
  order: 2;
}

.page-news__sidebar-inner {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.page-news__sidebar-title {
  margin: 0 0 0.6rem;
  padding-left: 0.75rem;
  border-left: 3px solid var(--news-gold);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--news-gold);
}

.page-news__category-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--news-line);
  background: rgba(6, 10, 24, 0.55);
}

.page-news__category-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.8rem 1rem;
  color: var(--news-text);
  font-size: 0.9rem;
  text-decoration: none;
  border-bottom: 1px solid var(--news-line);
  transition: background 0.3s ease, color 0.3s ease;
}

.page-news__category-link:last-child {
  border-bottom: 0;
}

.page-news__category-link span {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  color: var(--news-gold);
  opacity: 0.75;
}

.page-news__category-link:hover,
.page-news__category-link:focus-visible {
  background: rgba(123, 47, 190, 0.2);
  color: var(--news-gold);
}

.page-news__sidebar-panel {
  margin: 0;
  padding: 1.5rem 1rem;
  text-align: center;
}

.page-news__sidebar-number {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--font-heading);
  font-size: 3.25rem;
  font-weight: 700;
  line-height: 1;
  color: var(--news-gold);
}

.page-news__sidebar-panel p {
  margin: 0.5rem 0 1rem;
  color: var(--news-text);
  font-size: 0.85rem;
  line-height: 1.55;
}

.page-news__sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-news__sidebar-links a {
  padding: 0.4rem 0;
  border-bottom: 1px dashed rgba(136, 146, 176, 0.3);
  color: var(--news-muted);
  font-size: 0.88rem;
  text-decoration: none;
  transition: color 0.3s ease, padding-left 0.3s ease;
}

.page-news__sidebar-links a:hover,
.page-news__sidebar-links a:focus-visible {
  color: var(--news-gold);
  padding-left: 0.4rem;
}

/* ========== 内容列 ========== */
.page-news__content {
  order: 1;
  min-width: 0;
}

/* 头条 */
.page-news__featured {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
  scroll-margin-top: calc(var(--header-h, 72px) + 1rem);
}

.page-news__featured-media {
  display: block;
  margin: 0;
  aspect-ratio: auto;
  overflow: hidden;
}

.page-news__featured-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - var(--cut, 10px)) 0, 100% var(--cut, 10px), 100% 100%, var(--cut, 10px) 100%, 0 calc(100% - var(--cut, 10px)));
}

.page-news__featured-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-news__featured-title {
  margin: 0 0 0.8rem;
  font-family: var(--font-heading);
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  line-height: 1.3;
}

.page-news__featured-text {
  margin: 0 0 0.75rem;
  color: var(--news-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* 标签 */
.page-news__tag {
  display: inline-block;
  margin-bottom: 0.6rem;
  padding: 0.2rem 0.55rem;
  border: 1px solid rgba(242, 193, 78, 0.5);
  color: var(--news-gold);
  background: rgba(242, 193, 78, 0.07);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.4;
}

.page-news__tag--gold {
  background: rgba(242, 193, 78, 0.16);
  box-shadow: 0 0 14px rgba(242, 193, 78, 0.22);
}

/* 新闻列表 */
.page-news__news-list {
  padding: 0.25rem 0;
  border-top: 1px solid var(--news-line);
  border-bottom: 1px solid var(--news-line);
  margin-bottom: 1rem;
}

.page-news__news-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--news-line);
}

.page-news__news-item:last-child {
  border-bottom: 0;
}

.page-news__news-thumb {
  display: block;
  width: 100%;
  height: auto;
  clip-path: polygon(0 0, calc(100% - var(--cut, 10px)) 0, 100% var(--cut, 10px), 100% 100%, var(--cut, 10px) 100%, 0 calc(100% - var(--cut, 10px)));
}

.page-news__news-body h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  line-height: 1.4;
}

.page-news__news-body h3 a {
  color: var(--news-text);
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-news__news-body h3 a:hover,
.page-news__news-body h3 a:focus-visible {
  color: var(--news-gold);
}

.page-news__news-body p {
  margin: 0 0 0.35rem;
  color: var(--news-muted);
  font-size: 0.88rem;
  line-height: 1.65;
}

/* 展开阅读 */
.page-news__news-more {
  margin-top: 0.65rem;
}

.page-news__news-more summary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  list-style: none;
  color: var(--news-gold);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  user-select: none;
}

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

.page-news__news-more summary::before {
  content: '+';
  font-family: var(--font-heading);
  font-size: 1rem;
  line-height: 1;
}

.page-news__news-more[open] summary::before {
  content: '−';
}

.page-news__news-more p {
  margin: 0.6rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--news-line-gold);
  color: var(--news-muted);
  font-size: 0.86rem;
  line-height: 1.6;
}

/* ========== 通用章节 ========== */
.page-news__section {
  position: relative;
  padding: 2.75rem 0;
  border-top: 1px solid var(--news-line);
  scroll-margin-top: calc(var(--header-h, 72px) + 1rem);
}

.page-news__section::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  width: 120px;
  height: 3px;
  background: linear-gradient(90deg, var(--news-gold), rgba(242, 193, 78, 0.2) 70%, transparent);
}

.page-news__section .section-label {
  margin-bottom: 0.5rem;
}

.page-news__section-title {
  margin: 0.6rem 0 1rem;
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  line-height: 1.25;
}

.page-news__section-desc {
  max-width: 680px;
  margin: 0 0 1.75rem;
  color: var(--news-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.page-news__section-more {
  margin-top: 1.5rem;
}

/* ========== 版本时间线 ========== */
.page-news__timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.page-news__timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--news-gold) 0%, rgba(123, 47, 190, 0.55) 100%);
}

.page-news__timeline-item {
  position: relative;
  padding-left: 2.1rem;
}

.page-news__timeline-item:nth-child(even) .page-news__timeline-card {
  margin-top: 1rem;
}

.page-news__timeline-dot {
  position: absolute;
  left: 1px;
  top: 1.2rem;
  width: 14px;
  height: 14px;
  border: 3px solid var(--news-gold);
  border-radius: 50%;
  background: var(--news-deep, #060A18);
  box-shadow: 0 0 10px rgba(242, 193, 78, 0.65);
}

.page-news__timeline-card {
  margin: 0;
  padding: 1.2rem 1.25rem;
  border: 1px solid rgba(230, 232, 239, 0.1);
  border-left: 3px solid var(--news-gold);
  background: rgba(61, 44, 141, 0.6);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.page-news__timeline-card:hover,
.page-news__timeline-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(6, 10, 24, 0.6);
}

.page-news__timeline-card h3 {
  margin: 0.4rem 0 0.6rem;
  font-family: var(--font-heading);
  font-size: 1rem;
}

.page-news__timeline-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-news__timeline-list li {
  position: relative;
  margin-bottom: 0.5rem;
  padding-left: 1.2rem;
  color: var(--news-text);
  font-size: 0.88rem;
  line-height: 1.6;
}

.page-news__timeline-list li:last-child {
  margin-bottom: 0;
}

.page-news__timeline-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 6px;
  height: 6px;
  background: var(--news-gold);
  transform: rotate(45deg);
}

/* ========== 文档网格 ========== */
.page-news__doc-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.8rem;
}

.page-news__doc-item {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 0.9rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--news-line);
  border-left: 2px solid var(--news-gold);
  background: rgba(6, 10, 24, 0.5);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.page-news__doc-item:hover {
  background: rgba(123, 47, 190, 0.14);
  border-color: rgba(242, 193, 78, 0.4);
}

.page-news__doc-num {
  grid-row: 1 / 3;
  align-self: center;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  line-height: 1;
  color: var(--news-gold);
  opacity: 0.85;
}

.page-news__doc-item h4 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 0.88rem;
  color: var(--news-text);
}

.page-news__doc-item p {
  margin: 0.3rem 0 0;
  color: var(--news-muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

/* ========== 检索技巧 ========== */
.page-news__tips {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
}

.page-news__tips-img {
  display: block;
  margin: 0;
  aspect-ratio: auto;
  overflow: hidden;
}

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

.page-news__tips-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: tip;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-news__tips-list li {
  position: relative;
  counter-increment: tip;
  padding: 1rem 1rem 1rem 3.1rem;
  border: 1px solid var(--news-line);
  border-left: 3px solid var(--news-gold);
  background: rgba(15, 82, 87, 0.16);
}

.page-news__tips-list li::before {
  content: counter(tip, decimal-leading-zero);
  position: absolute;
  left: 1rem;
  top: 1rem;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--news-gold);
}

.page-news__tips-list h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--news-text);
}

.page-news__tips-list p {
  margin: 0;
  color: var(--news-muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* ========== 反馈区 ========== */
.page-news__feedback {
  padding: 2.75rem 0 0.5rem;
  border-top: 1px solid var(--news-line);
  scroll-margin-top: calc(var(--header-h, 72px) + 1rem);
}

.page-news__feedback-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
}

.page-news__feedback-img {
  display: block;
  margin: 0;
  aspect-ratio: auto;
  overflow: hidden;
}

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

.page-news__feedback-body p {
  margin: 0 0 0.8rem;
  color: var(--news-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.page-news__feedback .btn {
  margin-top: 0.5rem;
}

/* ========== 桌面端适配 ========== */
@media (min-width: 768px) {
  .page-news__header {
    padding: 4rem 0 2.75rem;
  }

  .page-news__layout {
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 2.5rem;
    padding: 2.75rem 0 5rem;
  }

  .page-news__sidebar {
    order: 1;
  }

  .page-news__content {
    order: 2;
  }

  .page-news__featured {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-news__news-item {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 1.5rem;
    align-items: center;
  }

  .page-news__news-thumb {
    width: 200px;
    height: 150px;
    object-fit: cover;
  }

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

  .page-news__tips {
    grid-template-columns: 320px minmax(0, 1fr);
    align-items: start;
  }

  .page-news__feedback-grid {
    grid-template-columns: 380px minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 1080px) {
  .page-news__doc-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}