.page-news {
  background: var(--bg-space);
  overflow-x: hidden;
}

/* ===== Hero ===== */
.page-news__hero {
  padding: 24px 0 32px;
  border-bottom: 1px solid var(--line);
  background:
    repeating-linear-gradient(-45deg, transparent 0 12px, rgba(0, 255, 136, .025) 12px 13px),
    linear-gradient(120deg, rgba(0, 255, 136, .06) 0%, transparent 45%),
    var(--bg-space);
}
.page-news__hero-inner {
  padding-top: 28px;
}
.page-news__hero-text .section-label {
  display: block;
  margin-bottom: 8px;
}
.page-news__hero h1 {
  font-family: var(--font-head);
  font-size: clamp(3rem, 10vw, 5.5rem);
  line-height: .95;
  text-transform: uppercase;
  transform: skewX(-5deg);
  color: var(--text-high);
  margin: 0;
  letter-spacing: .01em;
}
.page-news__hero-desc {
  max-width: 560px;
  margin: 18px 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--accent);
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.65;
}

/* ===== 筛选条 ===== */
.page-news__filterbar {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 29, 58, .78);
}
.page-news__filterbar-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.page-news__filterbar-counter {
  margin-right: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--text-mute);
  text-transform: uppercase;
}

/* ===== 时间线章节 ===== */
.page-news__timeline-section {
  padding: 48px 0 8px;
  background-image:
    radial-gradient(rgba(0, 255, 136, .04) 1px, transparent 1px),
    radial-gradient(rgba(242, 238, 233, .02) 1px, transparent 1px);
  background-size: 26px 26px, 42px 42px;
  background-position: 0 0, 14px 20px;
}
.page-news__timeline {
  position: relative;
  padding-left: 24px;
  margin-top: 32px;
  max-width: 980px;
}
.page-news__timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent) 0%, rgba(0, 255, 136, .3) 35%, rgba(0, 255, 136, .06) 100%);
}
.page-news__timeline-axis {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  padding-left: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.page-news__timeline-axis-line {
  flex: 1;
  max-width: 180px;
  height: 1px;
  background: linear-gradient(90deg, var(--line-accent), transparent);
}

/* ===== 文章卡片 ===== */
.page-news__post {
  position: relative;
  margin-bottom: 28px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: border-color var(--ease), transform var(--ease), box-shadow var(--ease);
}
.page-news__post:hover {
  transform: translateY(-3px);
  border-color: var(--line-accent);
  box-shadow: 0 14px 38px rgba(0, 0, 0, .45);
}
.page-news__post:has(.page-news__expand[open]) {
  border-color: var(--line-accent);
}
.page-news__post-marker {
  position: absolute;
  top: 30px;
  left: -24px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-space);
  box-shadow: 0 0 0 3px rgba(0, 255, 136, .14);
  z-index: 1;
}
.page-news__post-grid {
  display: grid;
  grid-template-columns: 1fr;
}
.page-news__post-figure {
  margin: 0;
  padding: 12px 12px 0;
  aspect-ratio: auto;
}
.page-news__post-figure img {
  display: block;
  width: 100%;
  height: auto;
}
.page-news__post-content {
  padding: 18px 18px 20px;
}
.page-news__post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.page-news__post-time {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--text-mute);
  text-transform: uppercase;
}
.page-news__post h3 {
  font-family: var(--font-head);
  font-size: 1.45rem;
  line-height: 1.2;
  color: var(--text-high);
  margin: 0 0 10px;
  transform: skewX(-3deg);
}
.page-news__post p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-dim);
  margin: 0 0 12px;
}

/* ===== 展开 ===== */
.page-news__expand {
  margin-top: 10px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}
.page-news__expand summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--accent);
  user-select: none;
}
.page-news__expand summary::-webkit-details-marker {
  display: none;
}
.page-news__expand summary::before {
  content: "+";
  display: inline-block;
  font-size: 16px;
  line-height: 1;
  color: var(--accent);
  transition: transform var(--ease);
}
.page-news__expand[open] summary::before {
  transform: rotate(45deg);
}
.page-news__expand-text {
  margin-top: 12px !important;
  font-size: 14px !important;
  line-height: 1.65 !important;
  color: var(--text-dim) !important;
  padding-right: 8px;
}
.page-news__expand .btn {
  margin-top: 12px;
}

/* ===== 自定义标签变体 ===== */
.page-news__tag--season {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  border-radius: 2px;
  background: rgba(198, 107, 74, .15);
  border: 1px solid rgba(198, 107, 74, .35);
  color: #E89A7A;
}
.page-news__tag--announce {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  border-radius: 2px;
  background: rgba(58, 110, 165, .15);
  border: 1px solid rgba(58, 110, 165, .35);
  color: #7FAEDB;
}

/* ===== 热点专题 ===== */
.page-news__topics-section {
  padding: 52px 0 72px;
  background:
    repeating-linear-gradient(-45deg, transparent 0 14px, rgba(0, 255, 136, .018) 14px 15px),
    linear-gradient(160deg, rgba(0, 255, 136, .03) 0%, transparent 38%),
    var(--bg-space);
}
.page-news__topics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 32px;
}
.page-news__topic {
  position: relative;
  display: block;
  padding: 30px 24px 44px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  text-decoration: none;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: border-color var(--ease), transform var(--ease);
}
.page-news__topic:hover {
  transform: translateY(-3px);
  border-color: var(--line-accent);
}
.page-news__topic h3 {
  font-family: var(--font-head);
  font-size: 1.55rem;
  color: var(--text-high);
  margin: 14px 0 10px;
  transform: skewX(-4deg);
}
.page-news__topic p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-dim);
  margin: 0 0 8px;
}
.page-news__topic-arrow {
  position: absolute;
  right: 18px;
  bottom: 14px;
  font-size: 22px;
  line-height: 1;
  color: var(--accent);
}
.page-news__topic--terra {
  background: linear-gradient(135deg, rgba(198, 107, 74, .22) 0%, rgba(198, 107, 74, .04) 100%);
  border-color: rgba(198, 107, 74, .32);
}
.page-news__topic--steel {
  background: linear-gradient(135deg, rgba(58, 110, 165, .22) 0%, rgba(58, 110, 165, .04) 100%);
  border-color: rgba(58, 110, 165, .32);
}
.page-news__topic--moss {
  background: linear-gradient(135deg, rgba(106, 138, 74, .22) 0%, rgba(106, 138, 74, .04) 100%);
  border-color: rgba(106, 138, 74, .32);
}
.page-news__support-note {
  margin-top: 28px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-mute);
}
.page-news__support-note a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--line-accent);
}

/* ===== 桌面端 ===== */
@media (min-width: 768px) {
  .page-news__hero {
    padding: 44px 0 56px;
  }
  .page-news__hero-inner {
    padding-top: 48px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 40px;
  }
  .page-news__hero-desc {
    max-width: 420px;
    font-size: 18px;
    margin-top: 0;
  }
  .page-news__timeline-section {
    padding: 72px 0 16px;
  }
  .page-news__timeline {
    padding-left: 40px;
  }
  .page-news__timeline::before {
    left: 6px;
  }
  .page-news__post-marker {
    left: -40px;
    width: 12px;
    height: 12px;
    top: 34px;
  }
  .page-news__post-grid {
    grid-template-columns: 2fr 3fr;
  }
  .page-news__post-figure {
    padding: 0;
    min-height: 240px;
    height: 100%;
  }
  .page-news__post-figure img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .page-news__post-content {
    padding: 26px 28px 28px;
  }
  .page-news__post h3 {
    font-size: 1.65rem;
  }
  .page-news__topics {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .page-news__topic {
    padding: 34px 28px 48px;
  }
  .page-news__topic h3 {
    font-size: 1.7rem;
  }
}