/**
 * 新闻资讯页面样式
 * 与牵翼云官网整体风格保持一致
 */

/* ===== 变量定义 ===== */
:root {
  --primary: #0A4FD6;
  --primary-light: #3D7BFF;
  --primary-dark: #0033A0;
  --accent: #00C2FF;
  --accent2: #7B4FFF;
  --success: #00D68F;
  --warning: #FFAA00;
  --bg-dark: #050E1F;
  --bg-card: #0C1A35;
  --bg-card2: #091428;
  --text-primary: #FFFFFF;
  --text-secondary: #9BB5D8;
  --text-muted: #5A7EA8;
  --border: rgba(61, 123, 255, 0.2);
  --border-bright: rgba(61, 123, 255, 0.5);
  --gradient-main: linear-gradient(135deg, #0A4FD6 0%, #7B4FFF 100%);
  --gradient-accent: linear-gradient(90deg, #00C2FF 0%, #3D7BFF 100%);
  --glow: 0 0 40px rgba(61, 123, 255, 0.3);
  --glow-accent: 0 0 30px rgba(0, 194, 255, 0.4);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 基础样式 ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ===== 导航栏 ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(5, 14, 31, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: var(--gradient-main);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 900;
  color: white;
  box-shadow: var(--glow);
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-name {
  font-size: 18px;
  font-weight: 700;
  color: white;
  letter-spacing: 1px;
}

.logo-tagline {
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 2px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-menu a {
  display: block;
  padding: 8px 16px;
  color: var(--text-secondary);
  font-size: 14px;
  border-radius: 8px;
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: white;
  background: rgba(61, 123, 255, 0.15);
}

/* ===== 主内容区 - 列表页 ===== */
.news-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 100px 32px 60px;
}

/* 页面标题 */
.page-header {
  text-align: center;
  margin-bottom: 48px;
}

.page-header h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 12px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 16px;
}

/* ===== 分类筛选 ===== */
.category-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.category-filter {
  padding: 10px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 30px;
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.category-filter .count {
  background: rgba(61, 123, 255, 0.2);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 12px;
  color: var(--primary-light);
}

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

.category-filter.active {
  background: var(--gradient-main);
  border-color: transparent;
  color: white;
  box-shadow: var(--glow);
}

.category-filter.active .count {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

/* ===== 文章列表网格 ===== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px;
}

/* 文章卡片 */
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-bright);
  box-shadow: var(--glow);
}

.card-link {
  display: block;
}

.card-image {
  width: 100%;
  height: 200px;
  background-size: cover;
  background-position: center;
  background-color: var(--bg-card2);
}

.card-content {
  padding: 24px;
}

.card-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
  font-size: 13px;
}

.card-source {
  color: var(--primary-light);
  font-weight: 500;
}

.card-date {
  color: var(--text-muted);
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 12px;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-summary {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}

.card-footer {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.category-tag {
  padding: 4px 10px;
  background: rgba(0, 194, 255, 0.1);
  border: 1px solid rgba(0, 194, 255, 0.3);
  border-radius: 4px;
  font-size: 12px;
  color: var(--accent);
}

.card-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.keyword {
  padding: 2px 8px;
  background: var(--bg-card2);
  border-radius: 4px;
  font-size: 12px;
  color: var(--text-muted);
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-muted);
  font-size: 16px;
  grid-column: 1 / -1;
}

/* ===== 文章详情页 ===== */
.article-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 100px 32px 60px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
}

.article-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.article-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.article-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--text-muted);
}

.article-source {
  color: var(--primary-light);
  font-weight: 500;
}

.article-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.article-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.article-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.keyword-tag {
  padding: 6px 12px;
  background: rgba(61, 123, 255, 0.1);
  border: 1px solid rgba(61, 123, 255, 0.3);
  border-radius: 20px;
  font-size: 13px;
  color: var(--primary-light);
}

/* 文章内容 */
.article-body {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-body p {
  margin-bottom: 20px;
}

.article-body h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 32px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.article-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 24px 0 12px;
}

.article-body ul,
.article-body ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body img {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 20px 0;
}

.article-body a {
  color: var(--primary-light);
  text-decoration: underline;
  text-decoration-color: rgba(61, 123, 255, 0.5);
}

.article-body a:hover {
  color: var(--accent);
}

.article-footer {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.original-link {
  font-size: 14px;
  color: var(--text-muted);
}

.original-link a {
  color: var(--primary-light);
}

.original-link a:hover {
  color: var(--accent);
}

/* ===== 侧边栏 ===== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.article-sidebar section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.article-sidebar h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

/* 相关文章 */
.related-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.related-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px;
  background: var(--bg-card2);
  border-radius: 8px;
  transition: var(--transition);
}

.related-item:hover {
  background: rgba(61, 123, 255, 0.1);
}

.related-title {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-date {
  font-size: 12px;
  color: var(--text-muted);
}

/* 关键词云 */
.cloud-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cloud-tag {
  padding: 6px 12px;
  background: var(--bg-card2);
  border-radius: 4px;
  font-size: 13px;
  color: var(--text-secondary);
  transition: var(--transition);
}

.cloud-tag:hover {
  background: rgba(61, 123, 255, 0.2);
  color: var(--primary-light);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 40px 32px;
  margin-top: 60px;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
  .article-container {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    order: 2;
  }
}

@media (max-width: 768px) {
  .nav-inner {
    padding: 0 16px;
  }

  .nav-menu {
    display: none;
  }

  .news-container,
  .article-container {
    padding: 90px 16px 40px;
  }

  .page-header h1 {
    font-size: 28px;
  }

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

  .article-content {
    padding: 24px;
  }

  .article-title {
    font-size: 22px;
  }

  .category-filters {
    gap: 8px;
  }

  .category-filter {
    padding: 8px 14px;
    font-size: 13px;
  }
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-light);
}