/* ===== 文章中心 page-news ===== */

.page-news {
  --news-rail-wide: 250px;
  --nc-cyan: #00E5FF;
  --nc-amber: #FFC107;
  --nc-green: #00C853;
  --nc-orange: #FF6D00;
  padding: 44px 0 72px;
  background-image:
    radial-gradient(circle at 88% 8%, rgba(0, 229, 255, 0.07), transparent 300px),
    radial-gradient(circle at 12% 55%, rgba(61, 10, 110, 0.32), transparent 420px);
}

.page-news .breadcrumb {
  margin-bottom: 30px;
}

.page-news .news-header {
  padding-bottom: 28px;
  margin-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.page-news .section-kicker {
  color: var(--cyan);
  margin-bottom: 14px;
  font-size: 13px;
  letter-spacing: 0.22em;
}

.page-news .news-header h1 {
  font-family: var(--font-head);
  font-size: clamp(2.3rem, 4.8vw, 3.5rem);
  line-height: 1.08;
  margin-bottom: 16px;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-news .news-lead {
  max-width: 740px;
  color: rgba(245, 240, 225, 0.7);
  font-weight: 300;
  line-height: 1.85;
  letter-spacing: 0.02em;
  font-size: 15px;
}

/* ----- 过滤区与网格纹理 ----- */

.page-news .news-filter-area {
  position: relative;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 26px 26px;
}

.page-news .news-filter-area > input[type="radio"] {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  margin: -1px;
  padding: 0;
  border: 0;
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

/* ----- 侧边目录栏 ----- */

.page-news .news-rail {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-left: 2px solid var(--nc-cyan);
  padding: 24px 20px 20px;
  margin-bottom: 28px;
  overflow: hidden;
}

.page-news .rail-block + .rail-block {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed rgba(255, 255, 255, 0.12);
}

.page-news .rail-title {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gray);
  margin-bottom: 14px;
}

.page-news .filter-labels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.page-news .filter-tab {
  --tab-count-c: var(--gray);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  padding: 9px 11px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(245, 240, 225, 0.86);
  font-size: 13px;
  line-height: 1.2;
  cursor: pointer;
  transition:
    background 0.25s var(--ease-out),
    border-color 0.25s,
    color 0.25s,
    box-shadow 0.25s;
}

.page-news .filter-tab:hover {
  border-color: var(--nc-cyan);
  background: rgba(0, 229, 255, 0.07);
}

.page-news .filter-tab .tab-count {
  color: var(--tab-count-c);
  font-size: 11px;
}

.page-news #cat-all:checked ~ .news-rail .filter-tab[for="cat-all"],
.page-news #cat-version:checked ~ .news-rail .filter-tab[for="cat-version"],
.page-news #cat-event:checked ~ .news-rail .filter-tab[for="cat-event"],
.page-news #cat-tech:checked ~ .news-rail .filter-tab[for="cat-tech"],
.page-news #cat-guide:checked ~ .news-rail .filter-tab[for="cat-guide"] {
  --tab-count-c: var(--deep-space);
  background: var(--nc-cyan);
  border-color: var(--nc-cyan);
  color: var(--deep-space);
  font-weight: 700;
  box-shadow: 0 0 18px rgba(0, 229, 255, 0.22);
}

.page-news .news-filter-area > input[type="radio"]:focus-visible ~ .news-rail .filter-tab[for="cat-all"],
.page-news .news-filter-area > input[type="radio"]:focus-visible ~ .news-rail .filter-tab[for="cat-version"],
.page-news .news-filter-area > input[type="radio"]:focus-visible ~ .news-rail .filter-tab[for="cat-event"],
.page-news .news-filter-area > input[type="radio"]:focus-visible ~ .news-rail .filter-tab[for="cat-tech"],
.page-news .news-filter-area > input[type="radio"]:focus-visible ~ .news-rail .filter-tab[for="cat-guide"] {
  outline: 2px solid var(--nc-cyan);
  outline-offset: 2px;
}

.page-news .rail-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 2px;
  color: rgba(245, 240, 225, 0.82);
  font-size: 13px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition:
    color 0.2s,
    border-color 0.2s,
    padding-left 0.2s;
}

.page-news .rail-links a:hover {
  color: var(--nc-cyan);
  border-bottom-color: rgba(0, 229, 255, 0.35);
  padding-left: 6px;
}

.page-news .rail-note {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px dashed rgba(255, 255, 255, 0.12);
  font-size: 11px;
  line-height: 1.8;
  color: var(--gray);
}

/* ----- 文章板 ----- */

.page-news .news-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 0 0 12px;
}

.page-news .news-board-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 2px 0 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.page-news .news-board-head h2 {
  font-family: var(--font-head);
  font-size: 1.6rem;
  color: var(--paper);
  letter-spacing: 0.02em;
}

.page-news .board-count {
  font-size: 12px;
  color: var(--gray);
}

/* ----- 文章卡片（带图） ----- */

.page-news .article-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: rgba(10, 14, 39, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-top: 3px solid var(--nc-cyan);
  border-radius: var(--radius-m);
  overflow: hidden;
  transition:
    background 0.32s var(--ease-out),
    transform 0.32s var(--ease-out),
    border-color 0.32s,
    box-shadow 0.32s;
}

.page-news .article-card[data-cat="event"] {
  border-top-color: var(--nc-amber);
}

.page-news .article-card[data-cat="tech"] {
  border-top-color: var(--nc-green);
}

.page-news .article-card[data-cat="guide"] {
  border-top-color: var(--nc-orange);
}

.page-news .article-card:hover {
  background: var(--paper);
  border-color: rgba(245, 240, 225, 0.9);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.36);
  transform: translateY(-5px);
}

.page-news .card-media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, var(--deep-space), var(--ultraviolet));
}

.page-news .card-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}

.page-news .article-card:hover .card-media img {
  transform: scale(1.04);
}

.page-news .card-index {
  position: absolute;
  top: 10px;
  left: 12px;
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1;
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.45);
  letter-spacing: -0.02em;
}

.page-news .card-cat {
  position: absolute;
  right: 12px;
  bottom: 10px;
  padding: 3px 9px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--deep-space);
  background: var(--nc-cyan);
  border-radius: 2px;
}

.page-news .cat-event {
  background: var(--nc-amber);
  color: var(--ink);
}

.page-news .cat-tech {
  background: var(--nc-green);
  color: var(--deep-space);
}

.page-news .cat-guide {
  background: var(--nc-orange);
  color: #fff;
}

.page-news .card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 20px 20px 22px;
}

.page-news .card-meta {
  font-size: 12px;
  color: var(--gray);
  margin-bottom: 10px;
  letter-spacing: 0.06em;
}

.page-news .card-title {
  display: block;
  color: var(--paper);
  font-family: var(--font-head);
  font-size: 1.28rem;
  line-height: 1.3;
  margin-bottom: 10px;
  text-decoration: none;
  letter-spacing: 0.01em;
  background-image: linear-gradient(var(--nc-cyan), var(--nc-cyan));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0 2px;
  transition:
    color 0.28s,
    background-size 0.32s var(--ease-out);
}

.page-news .card-title:hover {
  background-size: 100% 2px;
}

.page-news .card-excerpt {
  font-size: 14px;
  line-height: 1.8;
  font-weight: 300;
  letter-spacing: 0.02em;
  color: rgba(245, 240, 225, 0.66);
  margin-bottom: 14px;
}

.page-news .card-more {
  margin-top: auto;
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--nc-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.35);
  padding-bottom: 2px;
  transition:
    color 0.25s,
    border-color 0.25s;
}

/* 卡片悬停切换为浅色纸面 */
.page-news .article-card:hover .card-title {
  color: var(--ink);
}

.page-news .article-card:hover .card-excerpt {
  color: rgba(26, 26, 26, 0.74);
}

.page-news .article-card:hover .card-meta {
  color: rgba(26, 26, 26, 0.5);
}

.page-news .article-card:hover .card-more {
  color: var(--ink);
  border-color: rgba(26, 26, 26, 0.35);
}

/* ----- 无图索引卡片 ----- */

.page-news .article-card--plain {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  align-items: start;
  padding: 18px 16px 18px 20px;
  background: rgba(255, 255, 255, 0.05);
}

.page-news .plain-num {
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  color: rgba(255, 255, 255, 0.4);
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.3);
  letter-spacing: -0.02em;
  padding-top: 4px;
  transition:
    color 0.3s,
    -webkit-text-stroke-color 0.3s;
}

.page-news .article-card--plain .card-body {
  display: block;
  padding: 0;
}

.page-news .article-card--plain .card-title {
  font-size: 1.16rem;
}

.page-news .article-card--plain .card-more {
  margin-top: 10px;
}

.page-news .article-card--plain:hover .plain-num {
  color: rgba(26, 26, 26, 0.55);
  -webkit-text-stroke-color: rgba(26, 26, 26, 0.45);
}

/* 分类小标签 */
.page-news .cat-inline {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 2px;
  font-size: 11px;
  letter-spacing: 0.12em;
  margin-right: 2px;
}

.page-news .cat-inline--version {
  background: rgba(0, 229, 255, 0.14);
  color: var(--nc-cyan);
}

.page-news .cat-inline--event {
  background: rgba(255, 193, 7, 0.16);
  color: var(--nc-amber);
}

.page-news .cat-inline--tech {
  background: rgba(0, 200, 83, 0.14);
  color: var(--nc-green);
}

.page-news .cat-inline--guide {
  background: rgba(255, 109, 0, 0.16);
  color: var(--nc-orange);
}

.page-news .article-card--plain:hover .cat-inline--version {
  color: #005a66;
  background: rgba(0, 229, 255, 0.2);
}

.page-news .article-card--plain:hover .cat-inline--event {
  color: #7a5b00;
  background: rgba(255, 193, 7, 0.22);
}

.page-news .article-card--plain:hover .cat-inline--tech {
  color: #005a33;
  background: rgba(0, 200, 83, 0.2);
}

.page-news .article-card--plain:hover .cat-inline--guide {
  color: #8a3a00;
  background: rgba(255, 109, 0, 0.2);
}

/* ----- 分类过滤 ----- */

.page-news #cat-version:checked ~ .news-board .article-card:not([data-cat="version"]),
.page-news #cat-event:checked ~ .news-board .article-card:not([data-cat="event"]),
.page-news #cat-tech:checked ~ .news-board .article-card:not([data-cat="tech"]),
.page-news #cat-guide:checked ~ .news-board .article-card:not([data-cat="guide"]) {
  display: none;
}

/* ----- 入场动画 ----- */

@keyframes qiusu-news-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.page-news .article-card {
  animation: qiusu-news-fade-in 0.32s var(--ease-out) both;
}

.page-news .article-card:nth-child(2) {
  animation-delay: 0.04s;
}

.page-news .article-card:nth-child(3) {
  animation-delay: 0.08s;
}

.page-news .article-card:nth-child(4) {
  animation-delay: 0.12s;
}

.page-news .article-card:nth-child(5) {
  animation-delay: 0.16s;
}

.page-news .article-card:nth-child(6) {
  animation-delay: 0.2s;
}

.page-news .article-card:nth-child(7) {
  animation-delay: 0.24s;
}

.page-news .article-card:nth-child(8) {
  animation-delay: 0.28s;
}

.page-news .article-card:nth-child(9) {
  animation-delay: 0.32s;
}

/* ----- 桌面双栏报纸布局 ----- */

@media (min-width: 768px) {
  .page-news .news-filter-area {
    display: grid;
    grid-template-columns: var(--news-rail-wide) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-news .news-rail {
    position: sticky;
    top: 24px;
    margin-bottom: 0;
  }

  .page-news .filter-labels {
    grid-template-columns: 1fr;
  }

  .page-news .news-board {
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: 28px 24px;
  }

  .page-news .news-board-head {
    grid-column: 1 / -1;
  }

  /* 第二列卡片向下错位，形成报纸式索引节奏 */
  .page-news .news-board .article-card:nth-child(2n + 3) {
    margin-top: 26px;
  }
}