/* ============================================================
   AI88.WORK 新闻中心 - 共享样式
   供 news.html / news-cat.html / news-detail.html 共同引用
   ============================================================ */

:root {
  --bg-deep: #000000;
  --primary: #0066ff;
  --primary-light: #3b82f6;
  --primary-dark: #0047b3;
  --text-main: #ffffff;
  --text-dim: #7a8ba3;
  --glass-bg: rgba(10, 20, 40, 0.4);
  --glass-border: rgba(0, 102, 255, 0.2);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
  background: var(--bg-deep);
  color: var(--text-main);
  overflow-x: hidden;
  line-height: 1.6;
}

#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

/* ===== 顶部导航 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 5%;
  z-index: 1000;
  transition: all 0.3s;
}

.nav-logo {
  font-size: 1.4em;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--primary-light);
        display: flex;              /* 或 display: grid */
      align-items: center; 
}

.nav-menu {
  display: flex;
  gap: 40px;
}

.nav-menu a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.95em;
  transition: all 0.3s;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.nav-cta {
  padding: 12px 30px;
  background: var(--primary);
  border: none;
  border-radius: 30px;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.nav-cta:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}

.mobile-menu-btn {
  display: none;
  font-size: 1.8em;
  color: var(--primary-light);
  cursor: pointer;
  user-select: none;
}

/* ===== 页面头部 ===== */
.page-hero {
  padding: 160px 5% 60px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 8px 20px;
  background: rgba(0, 102, 255, 0.1);
  border: 1px solid var(--primary);
  border-radius: 30px;
  color: var(--primary);
  font-size: 0.85em;
  letter-spacing: 2px;
  margin-bottom: 30px;
}

.page-hero h1 {
  font-size: clamp(2.2em, 5vw, 3.8em);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #fff;
}

.page-hero p {
  font-size: clamp(1em, 2vw, 1.2em);
  color: var(--text-dim);
  max-width: 700px;
  margin: 0 auto;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  max-width: 1400px;
  margin: 0 auto;
  padding: 110px 5% 0;
  font-size: 0.88em;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.3s;
}

.breadcrumb a:hover {
  color: var(--primary-light);
}

.breadcrumb .sep {
  color: rgba(122, 139, 163, 0.5);
}

.breadcrumb .current {
  color: var(--primary-light);
}

/* ===== 头条新闻 ===== */
.section {
  padding: 40px 5% 100px;
  max-width: 1400px;
  margin: 0 auto;
}

.featured-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.4s;
  margin-bottom: 70px;
  text-decoration: none;
}

.featured-card:hover {
  border-color: var(--primary);
  transform: translateY(-5px);
  box-shadow: 0 20px 60px rgba(0, 102, 255, 0.15);
}

.featured-visual {
  background: linear-gradient(135deg, rgba(0, 102, 255, 0.25), rgba(0, 71, 179, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  position: relative;
  overflow: hidden;
}

.featured-visual::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 102, 255, 0.2) 0%, transparent 60%);
  animation: featuredGlow 6s ease-in-out infinite;
}

@keyframes featuredGlow {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(5%, 5%); }
}

.featured-visual .visual-icon {
  font-size: 110px;
  filter: drop-shadow(0 0 30px rgba(0, 102, 255, 0.6));
  position: relative;
  z-index: 1;
}

.featured-body {
  padding: 45px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.category-tag {
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 0.78em;
  font-weight: 700;
  letter-spacing: 1px;
  background: rgba(0, 102, 255, 0.15);
  border: 1px solid var(--primary);
  color: var(--primary-light);
}

.category-tag.hot {
  background: rgba(255, 77, 79, 0.12);
  border-color: rgba(255, 77, 79, 0.6);
  color: #ff7875;
}

.news-date {
  color: var(--text-dim);
  font-size: 0.85em;
  font-family: 'Courier New', monospace;
}

.featured-body h2 {
  font-size: clamp(1.3em, 2.5vw, 1.8em);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 16px;
  color: #fff;
}

.featured-body p {
  color: var(--text-dim);
  line-height: 1.8;
  margin-bottom: 24px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.read-more {
  color: var(--primary-light);
  font-weight: 600;
  font-size: 0.95em;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s;
}

.featured-card:hover .read-more {
  gap: 12px;
}

/* ===== 分类筛选（链接式） ===== */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.filter-btn {
  display: inline-block;
  padding: 10px 28px;
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 30px;
  color: var(--text-dim);
  font-size: 0.95em;
  cursor: pointer;
  transition: all 0.3s;
  font-family: inherit;
  text-decoration: none;
}

.filter-btn:hover {
  color: var(--primary-light);
  border-color: var(--primary);
}

.filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 5px 20px rgba(0, 102, 255, 0.35);
}

/* ===== 新闻列表 ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 30px;
}

.news-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 32px;
  cursor: pointer;
  transition: all 0.4s;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.news-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 102, 255, 0.08), transparent);
  transition: left 0.8s;
}

.news-card:hover::before {
  left: 100%;
}

.news-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
}

.news-card .card-icon {
  font-size: 2.2em;
  margin-bottom: 18px;
}

.news-card h3 {
  font-size: 1.2em;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 14px;
  color: #fff;
  transition: color 0.3s;
}

.news-card:hover h3 {
  color: var(--primary-light);
}

.news-card p {
  color: var(--text-dim);
  font-size: 0.92em;
  line-height: 1.7;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 20px;
}

.news-card .news-meta {
  margin-bottom: 16px;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 16px;
}

.card-footer .read-more {
  font-size: 0.88em;
}

/* 空状态 */
.empty-tip {
  text-align: center;
  color: var(--text-dim);
  padding: 80px 0;
  grid-column: 1 / -1;
}

/* ===== 文章详情页 ===== */
.article-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 5% 100px;
}

.article-box {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 60px 65px;
}

.article-box .news-meta {
  margin-bottom: 22px;
}

.article-box h1 {
  font-size: clamp(1.5em, 3.2vw, 2.2em);
  font-weight: 800;
  line-height: 1.45;
  margin-bottom: 34px;
  color: #fff;
}

.article-body p {
  color: #b8c4d8;
  line-height: 2;
  margin-bottom: 22px;
  font-size: 1.02em;
}

.article-body strong {
  color: var(--primary-light);
}

.article-body blockquote {
  border-left: 3px solid var(--primary);
  padding: 15px 25px;
  background: rgba(0, 102, 255, 0.06);
  border-radius: 0 12px 12px 0;
  margin: 28px 0;
  color: #d0daea;
  font-style: italic;
}

/* 上一篇 / 下一篇 */
.prev-next {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 40px;
}

.prev-next a {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 26px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  text-decoration: none;
  transition: all 0.3s;
}

.prev-next a:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
}

.prev-next .pn-label {
  font-size: 0.8em;
  color: var(--text-dim);
  letter-spacing: 1px;
}

.prev-next .pn-title {
  font-size: 0.95em;
  color: #fff;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.prev-next a.next {
  text-align: right;
  align-items: flex-end;
}

.prev-next a.next .pn-title {
  color: var(--primary-light);
}

.prev-next a.prev .pn-title {
  color: var(--primary-light);
}

/* 返回列表 */
.back-to-list {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 40px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.95em;
  transition: color 0.3s, gap 0.3s;
}

.back-to-list:hover {
  color: var(--primary-light);
  gap: 14px;
}

/* 相关阅读 */
.related-section {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 5% 100px;
}

.related-section h2 {
  font-size: 1.6em;
  font-weight: 700;
  margin-bottom: 30px;
  color: #fff;
  text-align: center;
}

/* ===== CTA ===== */
.cta-section {
  text-align: center;
  padding: 120px 5%;
  background: rgba(0, 102, 255, 0.05);
  border-top: 1px solid var(--glass-border);
}

.cta-section h2 {
  font-size: clamp(2em, 4vw, 3.5em);
  margin-bottom: 30px;
  font-weight: 800;
}

.cta-section p {
  font-size: 1.2em;
  color: var(--text-dim);
  margin-bottom: 50px;
}

.btn-primary {
  padding: 18px 50px;
  background: var(--primary);
  border: none;
  border-radius: 50px;
  color: #fff;
  font-size: 1.1em;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-primary:hover {
  transform: translateY(-3px);
  background: var(--primary-light);
  box-shadow: 0 15px 40px rgba(0, 102, 255, 0.4);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .mobile-menu-btn { display: block; }

  .nav-menu {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
    padding: 20px 0;
    gap: 25px;
    text-align: center;
    border-bottom: 1px solid var(--glass-border);
    opacity: 0;
    transform: translateY(-20px);
    pointer-events: none;
    transition: all 0.3s ease-in-out;
  }

  .nav-menu.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .page-hero { padding-top: 130px; }

  .featured-card {
    grid-template-columns: 1fr;
  }

  .featured-visual { min-height: 200px; }
  .featured-visual .visual-icon { font-size: 70px; }
  .featured-body { padding: 28px; }

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

  .breadcrumb { padding-top: 100px; }

  .article-box { padding: 36px 24px; }

  .prev-next { grid-template-columns: 1fr; }
}