/* ===================================================================
   news.css — 新闻中心（分类筛选 + 新闻卡片网格）
   1) 页头区与筛选条   2) 卡片网格   3) 空态   4) 底部联系条   5) 响应式
   依赖 base.css 的设计变量
   =================================================================== */

/* ===================================================================
   1. 页头区与筛选条
   =================================================================== */
.news-page {
  background: #fff;
  /* 固定页头占位：页头高度 + 呼吸间距 */
  padding: calc(var(--header-h) + 52px) 0 110px;
}

.news-h1 {
  font-size: clamp(24px, 2.4vw, 34px);
  font-weight: 800;
  letter-spacing: -.5px;
  color: var(--c-ink);
}
.news-sub {
  margin-top: 12px;
  font-size: 15.5px;
  color: var(--c-text-mute);
}

.news-filterbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--c-line);
}
.filter-label {
  margin-right: 6px;
  font-size: 14px;
  color: var(--c-text-mute);
}
.filter-tab {
  padding: 9px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--c-bg-alt);
  color: var(--c-text-mute);
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--tr), color var(--tr), transform var(--tr);
}
.filter-tab:hover { color: var(--c-ink); transform: translateY(-1px); }
.filter-tab.is-on {
  background: var(--c-ink);
  color: #fff;
}

/* ===================================================================
   2. 卡片网格
   auto-fill + 206px 最小宽度：宽屏自动排满 7 列，窄屏自动递减
   =================================================================== */
.news-grid {
  display: grid;
  /* 固定 4 列：配合每页 12 篇（4×3），保证每页都是整行，不会出现「最后一行只挂一个」 */
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 40px 20px;
  margin-top: 42px;
}

.ncard { display: flex; flex-direction: column; }
.ncard.is-hidden { display: none; }

.ncard-media {
  position: relative;
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--c-bg-tint);
}
.ncard-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s cubic-bezier(.4,0,.2,1);
}
.ncard:hover .ncard-media img { transform: scale(1.06); }

/* 封面左上角分类徽标 */
.ncard-tag {
  position: absolute;
  left: 10px; top: 10px;
  padding: 5px 11px;
  border-radius: 999px;
  background: rgba(18,49,42,.74);
  color: #fff;
  font-size: 12px;
  line-height: 1.2;
  backdrop-filter: blur(4px);
}

.ncard-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 15px;
  font-size: 12.5px;
  color: var(--c-text-mute);
}
.ncard-cat { color: var(--c-accent-dk); }

.ncard-title {
  margin-top: 9px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-ink);
}
.ncard-title a { color: inherit; transition: color var(--tr); }
.ncard:hover .ncard-title a { color: var(--c-accent-dk); }

.ncard-text {
  margin-top: 9px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-text-mute);
  /* 摘要统一收成 3 行，保证卡片高度整齐 */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.ncard-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  padding-top: 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-accent-dk);
  transition: gap var(--tr), color var(--tr);
}
.ncard-link svg { width: 14px; height: 14px; }
.ncard-link:hover { gap: 10px; color: var(--c-accent); }

/* ===================================================================
   3. 空态
   =================================================================== */
.news-empty {
  margin-top: 60px;
  text-align: center;
  font-size: 15px;
  color: var(--c-text-mute);
}

/* ===================================================================
   4. 底部联系条
   =================================================================== */
.band {
  padding: 72px 0;
  background:
    radial-gradient(90% 140% at 12% 20%, rgba(18,165,148,.26) 0%, transparent 62%),
    linear-gradient(100deg, #0F2C26 0%, var(--c-ink) 100%);
}
.band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}
.band-text h2 { font-size: 28px; color: #fff; }
.band-text p {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(255,255,255,.72);
}
.band-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ===================================================================
   5. 响应式
   =================================================================== */
@media (max-width: 1200px) {
  .news-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .news-page { padding: calc(var(--header-h) + 36px) 0 80px; }
  .news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 18px; margin-top: 34px; }
  .band-text h2 { font-size: 24px; }
}

@media (max-width: 640px) {
  .news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 14px; }
  .ncard-title { font-size: 14.5px; }
  .ncard-text { font-size: 12.5px; -webkit-line-clamp: 4; }
  .ncard-tag { padding: 4px 9px; font-size: 11px; }
  .band { padding: 56px 0; }
  .band-actions .btn { width: 100%; }
}

@media (max-width: 420px) {
  .news-grid { grid-template-columns: 1fr; }   /* 12 篇 = 12 行，仍是整页 */
}

/* ---------- 列表页补充（数据库驱动后新增） ---------- */
.ncard-ph {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  min-height: 180px;
  background: linear-gradient(135deg, #dfeeea 0%, #eaf4f2 60%, #f3f8f7 100%);
  color: #7d9b95;
  font-size: 15px;
  letter-spacing: 1px;
  font-weight: 600;
}

.news-empty {
  grid-column: 1 / -1;
  padding: 60px 0;
  text-align: center;
  color: var(--c-text-mute);
  font-size: 15px;
}

.filter-count {
  display: inline-block;
  margin-left: 5px;
  font-size: 11px;
  opacity: .65;
}

.news-pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 48px auto 0;
}

.news-pager-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 9px 18px;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  background: #fff;
  color: var(--c-ink);
  font-size: 13.5px;
  text-decoration: none;
  transition: border-color .18s ease, color .18s ease, background .18s ease;
}

.news-pager-btn:hover {
  border-color: var(--c-accent);
  color: var(--c-accent-dk);
  background: var(--c-accent-lt);
}

.news-pager-btn.is-disabled {
  color: #c3cfcc;
  border-color: var(--c-line-soft);
  background: #fbfdfd;
  cursor: not-allowed;
}

.news-pager-nums {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.news-pager-num {
  display: grid;
  place-items: center;
  min-width: 36px;
  height: 36px;
  padding: 0 9px;
  border: 1px solid var(--c-line);
  border-radius: 10px;
  background: #fff;
  color: var(--c-ink);
  font-size: 13.5px;
  text-decoration: none;
  transition: border-color .18s ease, color .18s ease, background .18s ease;
}

.news-pager-num:hover {
  border-color: var(--c-accent);
  color: var(--c-accent-dk);
}

.news-pager-num.is-on {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
  font-weight: 600;
}

.news-pager-total {
  font-size: 12.5px;
  color: var(--c-text-mute);
  margin-left: 4px;
}