.page-news {
  --news-line: rgba(10, 27, 46, 0.12);
  --news-cut: 16px;
  background: var(--white);
  color: var(--text-color);
}

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

/* ===== Hero 区 ===== */
.page-news__hero {
  background: linear-gradient(180deg, var(--cloud) 0%, var(--white) 100%);
  border-bottom: 1px solid var(--news-line);
  padding: 40px 0 36px;
  position: relative;
}

.page-news__breadcrumb {
  margin-bottom: 28px;
}

.page-news__hero-text {
  max-width: 840px;
  margin-bottom: 32px;
}

.page-news__eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--royal-gold);
  margin: 0 0 10px;
}

.page-news__title {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.15;
  color: var(--deep-blue);
  margin: 0 0 12px;
  position: relative;
}

.page-news__title::after {
  content: "";
  display: block;
  width: 72px;
  height: 3px;
  margin-top: 12px;
  background: var(--royal-gold);
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.page-news__lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 640px;
  margin: 0;
}

.page-news__hero-figure {
  margin: 0;
  position: relative;
}

.page-news__hero-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 0 100%);
}

.page-news__hero-caption {
  display: none;
}

/* ===== 主体布局 ===== */
.page-news__layout {
  padding: 52px 0 80px;
}

.page-news__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  position: relative;
}

.page-news__filter-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-news__filter-radio:focus-visible ~ .page-news__sidebar .page-news__sidebar-label {
  outline: 2px solid var(--royal-gold);
  outline-offset: 2px;
}

/* ===== 侧边栏 ===== */
.page-news__sidebar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-content: flex-start;
}

.page-news__sidebar-title {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--deep-blue);
  margin: 0 0 4px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--deep-blue);
}

.page-news__sidebar-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--text-color);
  background: var(--cloud);
  border: 1px solid var(--news-line);
  padding: 8px 14px;
  cursor: pointer;
  user-select: none;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-news__sidebar-label::before {
  content: "◆";
  font-size: 9px;
  color: var(--mist);
  transition: transform 0.2s ease, color 0.2s ease;
}

.page-news__sidebar-label:hover {
  border-color: var(--royal-gold);
  color: var(--deep-blue);
}

.page-news__sidebar-note {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  margin: 8px 0 0;
  padding: 12px 14px;
  background: var(--wheat);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.page-news #news-filter-all:checked ~ .page-news__sidebar label[for="news-filter-all"],
.page-news #news-filter-platform:checked ~ .page-news__sidebar label[for="news-filter-platform"],
.page-news #news-filter-amount:checked ~ .page-news__sidebar label[for="news-filter-amount"],
.page-news #news-filter-version:checked ~ .page-news__sidebar label[for="news-filter-version"],
.page-news #news-filter-guide:checked ~ .page-news__sidebar label[for="news-filter-guide"] {
  background: var(--deep-blue);
  border-color: var(--deep-blue);
  color: var(--white);
}

.page-news #news-filter-all:checked ~ .page-news__sidebar label[for="news-filter-all"]::before,
.page-news #news-filter-platform:checked ~ .page-news__sidebar label[for="news-filter-platform"]::before,
.page-news #news-filter-amount:checked ~ .page-news__sidebar label[for="news-filter-amount"]::before,
.page-news #news-filter-version:checked ~ .page-news__sidebar label[for="news-filter-version"]::before,
.page-news #news-filter-guide:checked ~ .page-news__sidebar label[for="news-filter-guide"]::before {
  color: var(--royal-gold);
  transform: rotate(45deg);
}

/* ===== 内容流 ===== */
.page-news__stream {
  min-width: 0;
}

.page-news__block {
  margin-bottom: 72px;
}

.page-news__block:last-child {
  margin-bottom: 0;
}

.page-news__block-header {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  border-bottom: 2px solid var(--deep-blue);
  padding-bottom: 14px;
  margin-bottom: 28px;
}

.page-news__block-index {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--royal-gold);
  border-right: 1px solid var(--royal-gold);
  padding-right: 12px;
}

.page-news__block-title {
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1.2;
  color: var(--deep-blue);
  margin: 0;
}

.page-news__unread-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--white);
  background: var(--vermilion);
  padding: 3px 10px;
  letter-spacing: 0.04em;
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 0 100%);
}

.page-news__block-desc {
  width: 100%;
  font-size: 14px;
  color: var(--mist);
  margin: 0;
}

/* ===== 最新公告卡片 ===== */
.announce-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-news .announce-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--news-line);
  border-left: 4px solid var(--royal-gold);
  padding: 24px 24px 20px;
  box-shadow: 0 1px 0 rgba(10, 27, 46, 0.04);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.page-news .announce-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 22px 22px 0;
  border-color: transparent var(--cloud) transparent transparent;
  transition: border-color 0.2s ease;
}

.page-news .announce-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(10, 27, 46, 0.1);
  border-left-color: var(--dark-gold);
}

.page-news .announce-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.page-news .announce-card__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  white-space: nowrap;
}

.page-news .announce-card__title {
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.4;
  color: var(--deep-blue);
  margin: 0 0 10px;
}

.page-news .announce-card__summary {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-color);
  margin: 0 0 12px;
}

.page-news .announce-card__expand {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-color);
  border-top: 1px dashed var(--border-color);
  padding-top: 10px;
}

.page-news .announce-card__expand summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--dark-gold);
}

.page-news .announce-card__expand summary::-webkit-details-marker {
  display: none;
}

.page-news .announce-card__expand summary::before {
  content: "+";
  display: inline-block;
  font-size: 14px;
  line-height: 1;
  color: var(--royal-gold);
  transition: transform 0.2s ease;
}

.page-news .announce-card__expand[open] summary::before {
  transform: rotate(45deg);
}

.page-news .announce-card__expand > p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  border-left: 2px solid var(--wheat);
  padding-left: 12px;
}

.page-news__inline-link {
  color: var(--dark-gold);
  text-decoration: none;
  border-bottom: 1px solid var(--royal-gold);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-news__inline-link:hover {
  color: var(--deep-blue);
  border-color: var(--deep-blue);
}

/* ===== 版本迭代 ===== */
.page-news__versions-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-bottom: 28px;
}

.page-news__versions-figure {
  margin: 0;
}

.page-news__versions-img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.page-news__versions-figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid var(--royal-gold);
}

.page-news .version-timeline {
  position: relative;
  padding-left: 22px;
}

.page-news .version-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(to bottom, var(--royal-gold) 0%, var(--deep-blue) 100%);
  opacity: 0.35;
}

.page-news .version-item {
  position: relative;
  margin-bottom: 20px;
}

.page-news .version-item:last-child {
  margin-bottom: 0;
}

.page-news .version-item__marker {
  position: absolute;
  left: -22px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--royal-gold);
  transform: rotate(45deg);
  border: 2px solid var(--white);
  box-shadow: 0 0 0 1px rgba(201, 163, 106, 0.4);
}

.page-news .version-item__body {
  background: var(--cloud);
  border: 1px solid var(--news-line);
  padding: 16px 18px 14px;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.page-news .version-item__body:hover {
  background: var(--white);
  transform: translateX(4px);
  box-shadow: 0 4px 16px rgba(10, 27, 46, 0.08);
}

.page-news .version-item__name {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--deep-blue);
  margin: 0 0 4px;
}

.page-news .version-item__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-color);
  margin: 0 0 8px;
}

.page-news .version-item__list {
  margin: 0;
  padding: 0 0 0 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-news .version-item__list li + li {
  margin-top: 2px;
}

/* ===== 专题系列 ===== */
.page-news .feature-series {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-news .feature-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--news-line);
  background: var(--deep-blue);
  color: var(--white);
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-news .feature-card__cover {
  display: block;
  width: 100%;
  height: auto;
  max-height: 320px;
  object-fit: cover;
  opacity: 0.9;
}

.page-news .feature-card__body {
  padding: 18px 20px 20px;
}

.page-news .feature-card__title {
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.3;
  color: var(--white);
  margin: 10px 0 8px;
}

.page-news .feature-card__summary {
  font-size: 14px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 14px;
}

.page-news .feature-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--royal-gold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.page-news .feature-card__link:hover {
  border-bottom-color: var(--royal-gold);
}

.page-news .feature-series__list {
  display: grid;
  gap: 16px;
}

.page-news .feature-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  background: var(--cloud);
  border: 1px solid var(--news-line);
  padding: 18px 20px;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-news .feature-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(10, 27, 46, 0.08);
}

.page-news .feature-item__title {
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.35;
  color: var(--deep-blue);
  margin: 8px 0 6px;
}

.page-news .feature-item__summary {
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
  margin: 0 0 10px;
}

.page-news .feature-item__link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--dark-gold);
  text-decoration: none;
  border-bottom: 1px dashed var(--dark-gold);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-news .feature-item__link:hover {
  color: var(--deep-blue);
  border-bottom-color: var(--deep-blue);
}

.page-news .feature-item__poster {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

/* ===== 筛选显示控制 ===== */
.page-news .news-item {
  display: block;
}

.page-news .page-news__filter-radio:checked ~ .page-news__stream .news-item {
  display: none;
}

.page-news #news-filter-all:checked ~ .page-news__stream .news-item {
  display: block;
}

.page-news #news-filter-platform:checked ~ .page-news__stream .news-item[data-cat="platform"],
.page-news #news-filter-amount:checked ~ .page-news__stream .news-item[data-cat="amount"],
.page-news #news-filter-version:checked ~ .page-news__stream .news-item[data-cat="version"],
.page-news #news-filter-guide:checked ~ .page-news__stream .news-item[data-cat="guide"] {
  display: block;
}

.page-news #news-filter-platform:checked ~ .page-news__stream .page-news__block:not(:has(.news-item[data-cat="platform"])),
.page-news #news-filter-amount:checked ~ .page-news__stream .page-news__block:not(:has(.news-item[data-cat="amount"])),
.page-news #news-filter-version:checked ~ .page-news__stream .page-news__block:not(:has(.news-item[data-cat="version"])),
.page-news #news-filter-guide:checked ~ .page-news__stream .page-news__block:not(:has(.news-item[data-cat="guide"])) {
  display: none;
}

.page-news #news-filter-amount:checked ~ .page-news__stream .feature-series {
  grid-template-columns: minmax(0, 1fr);
}

.page-news #news-filter-amount:checked ~ .page-news__stream .announce-list,
.page-news #news-filter-platform:checked ~ .page-news__stream .announce-list {
  grid-template-columns: minmax(0, 1fr);
}

/* ===== 平板：640px ===== */
@media (min-width: 640px) {
  .page-news .announce-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-news .announce-card:last-child {
    grid-column: 1 / -1;
  }

  .page-news .feature-item {
    grid-template-columns: minmax(0, 1fr) 220px;
  }

  .page-news .feature-item--plain {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ===== 桌面：1024px ===== */
@media (min-width: 1024px) {
  .page-news__hero {
    padding: 48px 0 44px;
  }

  .page-news__hero-text {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
    gap: 24px;
    align-items: end;
  }

  .page-news__eyebrow {
    grid-column: 1 / -1;
    margin-bottom: 0;
  }

  .page-news__title {
    font-size: 44px;
    margin-bottom: 0;
  }

  .page-news__lead {
    margin-bottom: 4px;
  }

  .page-news__hero-caption {
    display: block;
    position: absolute;
    right: 12px;
    bottom: 12px;
    background: rgba(10, 27, 46, 0.82);
    color: var(--royal-gold);
    font-family: var(--font-mono);
    font-size: 12px;
    padding: 8px 14px;
    clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
  }

  .page-news__grid {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-news__sidebar {
    position: sticky;
    top: 140px;
    display: block;
    background: var(--white);
    padding-right: 8px;
  }

  .page-news__sidebar-title {
    margin-bottom: 12px;
  }

  .page-news__sidebar-label {
    display: flex;
    align-items: center;
    margin-bottom: 6px;
    border: none;
    border-left: 2px solid transparent;
    background: transparent;
    clip-path: none;
    padding: 10px 14px;
  }

  .page-news__sidebar-label::before {
    margin-right: 4px;
  }

  .page-news__sidebar-label:hover {
    background: var(--cloud);
    border-left-color: var(--royal-gold);
  }

  .page-news #news-filter-all:checked ~ .page-news__sidebar label[for="news-filter-all"],
  .page-news #news-filter-platform:checked ~ .page-news__sidebar label[for="news-filter-platform"],
  .page-news #news-filter-amount:checked ~ .page-news__sidebar label[for="news-filter-amount"],
  .page-news #news-filter-version:checked ~ .page-news__sidebar label[for="news-filter-version"],
  .page-news #news-filter-guide:checked ~ .page-news__sidebar label[for="news-filter-guide"] {
    background: var(--deep-blue);
    border-left-color: var(--royal-gold);
    color: var(--white);
  }

  .page-news__sidebar-note {
    margin-top: 24px;
  }

  .page-news .announce-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-news .announce-card:last-child {
    grid-column: auto;
  }

  .page-news__block-header {
    flex-wrap: nowrap;
    align-items: center;
  }

  .page-news__block-desc {
    width: auto;
    margin-left: auto;
    text-align: right;
  }

  .page-news .feature-series {
    grid-template-columns: minmax(240px, 320px) minmax(0, 1fr);
    gap: 24px;
  }

  .page-news .feature-card {
    min-height: 100%;
  }

  .page-news .feature-card__cover {
    flex: 1 1 auto;
    min-height: 260px;
    max-height: none;
    object-fit: cover;
  }
}

/* ===== 宽桌面：1200px ===== */
@media (min-width: 1200px) {
  .page-news__versions-wrap {
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-news__versions-figure {
    margin: 0;
  }
}