/* ===== page-news 专属样式 ===== */
.page-news {
  --news-orange: #E67E22;
  --news-dark: #2C3E50;
  --news-silver: #95A5A6;
  --news-bg-dark: #1A252F;
  --news-bg-light: #F8F9FA;
  --news-text-primary: #FFFFFF;
  --news-text-secondary: #BDC3C7;
  --news-radius: 12px;
  --news-radius-sm: 6px;
  --news-transition: 0.3s ease;
  --news-font-heading: 'Montserrat', 'Noto Sans SC', sans-serif;
  --news-font-body: 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
  --news-font-mono: 'Source Code Pro', 'Consolas', monospace;
  --news-max-width: 1120px;

  display: flex;
  flex-direction: column;
  gap: 0;
  background-color: var(--news-bg-dark);
  color: var(--news-text-primary);
  font-family: var(--news-font-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 面包屑 */
.page-news__breadcrumb {
  max-width: var(--news-max-width);
  width: 100%;
  margin: 0 auto;
  padding: 1rem 1.25rem 0;
  font-size: 0.85rem;
  font-family: var(--news-font-mono);
  color: var(--news-text-secondary);
  order: 0;
}

.page-news__breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-news__breadcrumb li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-news__breadcrumb li + li::before {
  content: "/";
  color: var(--news-silver);
  font-size: 0.8rem;
}

.page-news__breadcrumb a {
  color: var(--news-orange);
  text-decoration: none;
  transition: color var(--news-transition);
}

.page-news__breadcrumb a:hover,
.page-news__breadcrumb a:focus-visible {
  color: var(--cta-highlight);
  outline: 2px solid var(--news-orange);
  outline-offset: 2px;
  border-radius: 2px;
}

.page-news__breadcrumb [aria-current="page"] {
  color: var(--news-text-secondary);
  font-weight: 500;
}

/* 首屏英雄区 */
.page-news__hero {
  position: relative;
  width: 100%;
  max-width: var(--news-max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  overflow: hidden;
  order: 1;
  min-height: 240px;
  display: flex;
  align-items: center;
  border-bottom: 2px solid rgba(230, 126, 34, 0.25);
}

.page-news__hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  z-index: 0;
  opacity: 0.35;
  pointer-events: none;
}

.page-news__hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(135deg, rgba(26, 37, 47, 0.92) 0%, rgba(26, 37, 47, 0.60) 60%, rgba(230, 126, 34, 0.12) 100%);
  pointer-events: none;
}

.page-news__hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-news__hero-title {
  font-family: var(--news-font-heading);
  font-weight: 900;
  font-size: clamp(1.8rem, 5vw, 3rem);
  color: var(--news-text-primary);
  margin: 0;
  line-height: 1.15;
  letter-spacing: 0.01em;
  text-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.page-news__hero-sub {
  font-family: var(--news-font-mono);
  font-size: clamp(0.85rem, 2vw, 1rem);
  color: var(--news-orange);
  margin: 0;
  letter-spacing: 0.06em;
  opacity: 0.9;
}

/* 通用section标题（等宽索引前缀） */
.page-news__section-title {
  font-family: var(--news-font-heading);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.5vw, 2rem);
  color: var(--news-text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.page-news__section-title::before {
  content: attr(data-index);
  font-family: var(--news-font-mono);
  font-size: 0.7em;
  font-weight: 600;
  color: var(--news-orange);
  background: rgba(230, 126, 34, 0.12);
  padding: 0.15em 0.6em;
  border-radius: 999px;
  border: 1px solid rgba(230, 126, 34, 0.3);
  white-space: nowrap;
}

/* 官方公告区 */
.page-news__announcement {
  max-width: var(--news-max-width);
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.25rem;
  order: 2;
  border-bottom: 1px solid rgba(149, 165, 166, 0.15);
}

.page-news__announce-top {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.page-news__announce-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--news-orange);
  box-shadow: 0 0 0 4px rgba(230, 126, 34, 0.15);
  flex-shrink: 0;
}

.page-news__announce-body {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  font-size: 1rem;
  color: var(--news-text-secondary);
  background: rgba(44, 62, 80, 0.35);
  border-radius: var(--news-radius);
  padding: 1.5rem 1.75rem;
  border-left: 4px solid var(--news-orange);
}

.page-news__announce-body p {
  margin: 0;
}

/* 变更日志区 */
.page-news__changelog {
  max-width: var(--news-max-width);
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 3rem;
  order: 3;
}

.page-news__changelog-header {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.page-news__changelog-visual {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--news-radius-sm);
  object-fit: cover;
  opacity: 0.7;
  border: 1px solid rgba(149, 165, 166, 0.2);
  align-self: flex-start;
}

/* 时间线容器 */
.page-news__timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding-left: 2rem;
}

/* 时间线竖线 */
.page-news__timeline-line {
  position: absolute;
  left: 0.75rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--news-orange), rgba(230, 126, 34, 0.15));
  pointer-events: none;
  z-index: 0;
}

/* 卡片 — details/summary 实现展开折叠 */
.page-news__card {
  position: relative;
  z-index: 1;
  background: rgba(44, 62, 80, 0.30);
  border-radius: var(--news-radius);
  border: 1px solid rgba(149, 165, 166, 0.18);
  overflow: hidden;
  transition: border-color var(--news-transition), box-shadow var(--news-transition);
}

.page-news__card:hover {
  border-color: rgba(230, 126, 34, 0.4);
  box-shadow: 0 4px 20px rgba(230, 126, 34, 0.08);
}

.page-news__card[open] {
  border-color: rgba(230, 126, 34, 0.55);
  box-shadow: 0 6px 28px rgba(230, 126, 34, 0.12);
}

/* summary — 始终可见 */
.page-news__card-summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  list-style: none;
  transition: background var(--news-transition);
  user-select: none;
}

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

.page-news__card-summary:hover {
  background: rgba(230, 126, 34, 0.06);
}

.page-news__card-summary:focus-visible {
  outline: 2px solid var(--news-orange);
  outline-offset: -2px;
  border-radius: var(--news-radius);
}

/* 索引编号 */
.page-news__card-index {
  font-family: var(--news-font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--news-orange);
  background: rgba(230, 126, 34, 0.10);
  padding: 0.2em 0.5em;
  border-radius: 999px;
  min-width: 2.2em;
  text-align: center;
  border: 1px solid rgba(230, 126, 34, 0.2);
  flex-shrink: 0;
}

/* 时间线圆点 */
.page-news__card-marker {
  position: absolute;
  left: -1.6rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--news-orange);
  border: 2px solid var(--news-bg-dark);
  box-shadow: 0 0 0 2px var(--news-orange);
  flex-shrink: 0;
  top: 1.4rem;
}

.page-news__card:first-child .page-news__card-marker {
  background: var(--cta-highlight);
  box-shadow: 0 0 0 3px rgba(243, 156, 18, 0.3);
}

/* 标题行 */
.page-news__card-headline {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  flex: 1;
  min-width: 0;
}

.page-news__card-label {
  font-family: var(--news-font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--news-text-primary);
  line-height: 1.3;
}

.page-news__card-brief {
  font-size: 0.85rem;
  color: var(--news-text-secondary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 展开/折叠图标 */
.page-news__card-toggle {
  font-family: var(--news-font-mono);
  font-size: 1.3rem;
  font-weight: 300;
  color: var(--news-orange);
  flex-shrink: 0;
  width: 1.5em;
  text-align: center;
  transition: transform var(--news-transition);
  line-height: 1;
}

.page-news__card[open] .page-news__card-toggle {
  transform: rotate(45deg);
}

/* card-body — 展开后显示 */
.page-news__card-body {
  padding: 0 1.25rem 1.25rem;
  color: var(--news-text-secondary);
  font-size: 0.95rem;
  border-top: 1px solid rgba(149, 165, 166, 0.10);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-news__card-body p {
  margin: 0;
}

.page-news__card-img {
  width: 100%;
  max-width: 500px;
  height: auto;
  border-radius: var(--news-radius-sm);
  object-fit: cover;
  border: 1px solid rgba(149, 165, 166, 0.15);
}

/* 内链按钮样式 */
.page-news__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--news-font-mono);
  font-size: 0.85rem;
  color: var(--news-orange);
  text-decoration: none;
  padding: 0.4em 0.8em;
  border-radius: 999px;
  border: 1px solid rgba(230, 126, 34, 0.3);
  transition: all var(--news-transition);
  align-self: flex-start;
  background: rgba(230, 126, 34, 0.06);
}

.page-news__link:hover,
.page-news__link:focus-visible {
  color: var(--news-text-primary);
  background: var(--news-orange);
  border-color: var(--news-orange);
  outline: none;
}

/* 信任声明 */
.page-news__trust {
  max-width: var(--news-max-width);
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
  order: 4;
  text-align: center;
  border-top: 1px solid rgba(149, 165, 166, 0.10);
}

.page-news__trust p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--news-silver);
  font-style: italic;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== 响应式 ===== */

/* 窄屏（移动端优先，默认已适配） */
/* 额外窄屏微调 */
@media (max-width: 480px) {
  .page-news__hero {
    padding: 1.5rem 1rem 2rem;
    min-height: 180px;
  }

  .page-news__announcement,
  .page-news__changelog {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .page-news__announce-body {
    padding: 1rem 1.25rem;
  }

  .page-news__card-summary {
    padding: 0.75rem 1rem;
    flex-wrap: wrap;
  }

  .page-news__card-body {
    padding: 0 1rem 1rem;
  }

  .page-news__card-brief {
    -webkit-line-clamp: 2;
  }

  .page-news__timeline {
    padding-left: 1.75rem;
  }

  .page-news__card-marker {
    left: -1.35rem;
    width: 8px;
    height: 8px;
    top: 1.2rem;
  }

  .page-news__timeline-line {
    left: 0.6rem;
  }
}

/* 平板及以上 */
@media (min-width: 640px) {
  .page-news__hero {
    padding: 3rem 2rem 4rem;
    min-height: 300px;
  }

  .page-news__announce-top {
    flex-direction: row;
    align-items: center;
  }

  .page-news__announce-icon {
    width: 80px;
    height: 80px;
  }

  .page-news__changelog-header {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
  }

  .page-news__changelog-visual {
    max-width: 280px;
    margin-left: auto;
  }

  .page-news__timeline {
    padding-left: 2.5rem;
  }

  .page-news__card-marker {
    left: -2rem;
    width: 12px;
    height: 12px;
    top: 1.5rem;
  }

  .page-news__timeline-line {
    left: 0.9rem;
  }

  .page-news__card-summary {
    padding: 1.1rem 1.5rem;
  }
}

/* 桌面 */
@media (min-width: 900px) {
  .page-news__hero {
    padding: 4rem 2rem 5rem;
    min-height: 360px;
    border-bottom-width: 3px;
  }

  .page-news__hero-title {
    font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  }

  .page-news__announcement {
    padding: 3.5rem 2rem;
  }

  .page-news__announce-body {
    padding: 1.75rem 2.25rem;
    font-size: 1.05rem;
  }

  .page-news__changelog {
    padding: 3.5rem 2rem 4rem;
  }

  .page-news__timeline {
    gap: 1.5rem;
  }

  .page-news__card-label {
    font-size: 1.1rem;
  }

  .page-news__card-brief {
    font-size: 0.9rem;
  }

  .page-news__card-body {
    font-size: 1rem;
    padding: 0 1.5rem 1.5rem;
  }

  /* 桌面端时间线卡片左右交替 */
  .page-news__timeline {
    display: grid;
    grid-template-columns: 1fr 40px 1fr;
    gap: 1.5rem 0;
    padding-left: 0;
  }

  .page-news__timeline-line {
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    top: 0;
    bottom: 0;
  }

  .page-news__card {
    grid-column: 1 / 2;
    margin-right: 1.5rem;
  }

  .page-news__card:nth-child(even of details) {
    grid-column: 3 / 4;
    margin-right: 0;
    margin-left: 1.5rem;
  }

  .page-news__card-marker {
    display: none;
  }

  /* 用伪元素做桌面端时间线圆点 */
  .page-news__card::before {
    content: "";
    position: absolute;
    top: 1.5rem;
    right: -1.25rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--news-orange);
    border: 2px solid var(--news-bg-dark);
    box-shadow: 0 0 0 2px var(--news-orange);
    z-index: 2;
    transform: translateX(50%);
  }

  .page-news__card:nth-child(even of details)::before {
    right: auto;
    left: -1.25rem;
    transform: translateX(-50%);
  }

  .page-news__card:first-child::before {
    background: var(--cta-highlight);
    box-shadow: 0 0 0 3px rgba(243, 156, 18, 0.3);
  }

  .page-news__card-summary {
    padding: 1.25rem 1.75rem;
  }

  .page-news__card[open] .page-news__card-summary {
    border-radius: var(--news-radius) var(--news-radius) 0 0;
  }

  .page-news__trust {
    padding: 2rem 2rem 3rem;
  }
}

/* 大桌面 */
@media (min-width: 1200px) {
  .page-news__hero {
    padding: 5rem 0 6rem;
  }

  .page-news__announcement {
    padding: 4rem 0;
  }

  .page-news__changelog {
    padding: 4rem 0 5rem;
  }

  .page-news__trust {
    padding: 2.5rem 0 3.5rem;
  }
}