/* ========== 全局变量与重置 ========== */
:root {
  --bg-dark: #0a0e27;
  --bg-gradient: linear-gradient(135deg, #0a0e27 0%, #1a1040 40%, #0d2137 70%, #0a0e27 100%);
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --glass-blur: 10px;
  --accent-blue: #00d4ff;
  --accent-purple: #a855f7;
  --accent-green: #00ff88;
  --text-primary: #e8eaf6;
  --text-secondary: rgba(232,234,246,0.7);
  --text-muted: rgba(232,234,246,0.45);
  --font-main: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --radius: 16px;
  --transition: all 0.3s ease;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-main);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--accent-blue); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-purple); }

img { max-width: 100%; height: auto; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ========== Glassmorphism 通用 ========== */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}
.glass-card:hover {
  border-color: rgba(0,212,255,0.3);
  box-shadow: 0 8px 32px rgba(0,212,255,0.1);
  transform: translateY(-2px);
}

/* ========== 导航栏 ========== */
.main-nav {
  position: fixed; top:0; left:0; right:0; z-index:1000;
  background: rgba(10,14,39,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0 20px;
}
.nav-inner {
  max-width: 1200px; margin:0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-size: 1.25rem; font-weight: 700;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-links { display:flex; gap:24px; list-style:none; }
.nav-links a {
  color: var(--text-secondary); font-size:0.9rem; font-weight:500;
  padding: 6px 0; position:relative;
}
.nav-links a::after {
  content:''; position:absolute; bottom:0; left:0; width:0; height:2px;
  background: var(--accent-blue); transition: width 0.3s;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width:100%; }
.nav-links a.active { color: var(--accent-blue); }
.nav-links a.active::after { width:100%; }

.mobile-toggle { display:none; background:none; border:none; color:var(--text-primary); font-size:1.5rem; cursor:pointer; }

/* ========== 面包屑 ========== */
.breadcrumb {
  padding: 80px 0 10px;
  font-size: 0.85rem; color: var(--text-muted);
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb span { margin: 0 6px; }

/* ========== Hero 区域 ========== */
.hero-section {
  padding: 120px 0 60px;
  background: var(--bg-gradient);
  position: relative; overflow: hidden;
  text-align: center;
}
.hero-section::before {
  content:''; position:absolute; top:-50%; left:-50%;
  width:200%; height:200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(0,212,255,0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 50%, rgba(168,85,247,0.08) 0%, transparent 50%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}
@keyframes heroGlow {
  0% { transform: translate(0,0) scale(1); }
  100% { transform: translate(-5%,3%) scale(1.1); }
}
.hero-title {
  font-size: 2.8rem; font-weight:800; line-height:1.2;
  margin-bottom: 16px; position:relative; z-index:1;
}
.hero-title .highlight {
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-subtitle {
  font-size: 1.15rem; color: var(--text-secondary);
  max-width: 700px; margin: 0 auto 32px; position:relative; z-index:1;
}

/* ========== 搜索框 ========== */
.search-box {
  max-width: 560px; margin: 0 auto; position:relative; z-index:1;
}
.search-box input {
  width:100%; padding: 14px 56px 14px 20px;
  background: var(--glass-bg); border:1px solid var(--glass-border);
  border-radius: 50px; color: var(--text-primary); font-size:1rem;
  outline:none; transition: var(--transition);
}
.search-box input:focus { border-color: var(--accent-blue); box-shadow: 0 0 20px rgba(0,212,255,0.15); }
.search-box button {
  position:absolute; right:6px; top:50%; transform:translateY(-50%);
  width:42px; height:42px; border-radius:50%;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  border:none; color:#fff; font-size:1.1rem; cursor:pointer;
  display:flex; align-items:center; justify-content:center;
}
.search-status {
  margin-top:12px; font-size:0.85rem; color:var(--accent-green);
  min-height:20px; text-align:center;
}

/* ========== 仪表盘动画 ========== */
.dashboard-section { padding: 60px 0; }
.dashboard-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 32px;
  position: relative; overflow: hidden;
}
.dashboard-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 24px;
}
.dashboard-header h4 { font-size:1.2rem; font-weight:700; }
.live-dot {
  width:8px; height:8px; border-radius:50%; background:var(--accent-green);
  display:inline-block; margin-right:8px;
  animation: pulse 1.5s infinite;
}
@keyframes pulse { 0%,100%{opacity:1;} 50%{opacity:0.3;} }

.metrics-grid {
  display: grid; grid-template-columns: repeat(4,1fr); gap:20px;
  margin-bottom: 28px;
}
.metric-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px; padding: 20px; text-align:center;
}
.metric-value {
  font-size: 1.8rem; font-weight:800;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
.metric-label { font-size:0.8rem; color:var(--text-muted); margin-top:4px; }
.metric-change { font-size:0.75rem; margin-top:4px; }
.metric-change.up { color: var(--accent-green); }
.metric-change.down { color: #ff4757; }

/* 波形动画 */
.wave-chart {
  height: 120px; display:flex; align-items:flex-end; gap:3px;
  padding: 0 10px;
}
.wave-bar {
  flex:1; background: linear-gradient(to top, var(--accent-blue), var(--accent-purple));
  border-radius: 3px 3px 0 0; min-height:8px;
  animation: waveAnim 2s ease-in-out infinite;
}
@keyframes waveAnim {
  0%,100% { height: var(--h1); }
  50% { height: var(--h2); }
}

/* ========== 内容区块 ========== */
.section-title {
  font-size: 1.6rem; font-weight:700; text-align:center;
  margin-bottom: 12px;
}
.section-subtitle {
  text-align:center; color:var(--text-secondary); margin-bottom:40px;
  font-size:0.95rem;
}

.content-section { padding: 60px 0; }
.content-section:nth-child(even) { background: rgba(255,255,255,0.01); }

.cards-grid {
  display: grid; grid-template-columns: repeat(3,1fr); gap:24px;
}
.cards-grid-2 {
  display: grid; grid-template-columns: repeat(2,1fr); gap:24px;
}

/* ========== 新闻卡片 ========== */
.news-card { cursor:pointer; }
.news-card .news-img {
  width:100%; height:180px; object-fit:cover;
  border-radius: 12px 12px 0 0; margin: -28px -28px 20px;
  width: calc(100% + 56px);
}
.news-card h5 { font-size:1rem; font-weight:600; margin-bottom:8px; line-height:1.5; }
.news-card .news-time { font-size:0.8rem; color:var(--text-muted); }
.news-card .news-excerpt { font-size:0.88rem; color:var(--text-secondary); margin-top:8px; }

/* ========== 专家点评 ========== */
.expert-card { display:flex; gap:16px; align-items:flex-start; }
.expert-avatar {
  width:56px; height:56px; border-radius:50%; flex-shrink:0;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  display:flex; align-items:center; justify-content:center;
  font-size:1.3rem; font-weight:700; color:#fff;
}
.expert-info h5 { font-size:0.95rem; font-weight:600; }
.expert-info .expert-title { font-size:0.8rem; color:var(--accent-blue); margin-bottom:6px; }
.expert-info p { font-size:0.88rem; color:var(--text-secondary); }

/* ========== 用户评价 ========== */
.review-card { text-align:center; }
.review-stars { color: #ffd700; font-size:1.1rem; margin-bottom:10px; }
.review-text { font-size:0.9rem; color:var(--text-secondary); font-style:italic; margin-bottom:12px; }
.review-author { font-size:0.85rem; color:var(--text-muted); }

/* ========== Video 卡片 ========== */
.video-card {
  position:relative; cursor:pointer; overflow:hidden;
  border-radius: var(--radius);
  background: var(--glass-bg); border:1px solid var(--glass-border);
}
.video-thumb {
  width:100%; height:200px; object-fit:cover;
  transition: transform 0.4s;
}
.video-card:hover .video-thumb { transform: scale(1.05); }
.video-overlay {
  position:absolute; inset:0;
  display:flex; align-items:center; justify-content:center;
  background: rgba(0,0,0,0.4);
  opacity:0; transition: opacity 0.3s;
}
.video-card:hover .video-overlay { opacity:1; }
.play-btn {
  width:56px; height:56px; border-radius:50%;
  background: rgba(0,212,255,0.9);
  display:flex; align-items:center; justify-content:center;
  font-size:1.5rem; color:#fff;
}
.video-info { padding:16px; }
.video-info h5 { font-size:0.95rem; font-weight:600; }
.video-info .video-duration { font-size:0.8rem; color:var(--text-muted); margin-top:4px; }

/* ========== 文章内页 ========== */
.article-section { padding: 100px 0 60px; }
.article-container { max-width: 800px; margin:0 auto; }
.article-header { margin-bottom:32px; }
.article-header h1 { font-size:2rem; font-weight:800; line-height:1.3; margin-bottom:12px; }
.article-meta { display:flex; gap:20px; font-size:0.85rem; color:var(--text-muted); flex-wrap:wrap; }
.article-body { font-size:1rem; line-height:1.85; color:var(--text-secondary); }
.article-body h4, .article-body h5, .article-body h6 {
  color: var(--text-primary); margin: 28px 0 12px; font-weight:700;
}
.article-body h4 { font-size:1.3rem; }
.article-body h5 { font-size:1.1rem; }
.article-body h6 { font-size:1rem; }
.article-body p { margin-bottom:16px; }
.article-body blockquote {
  border-left: 3px solid var(--accent-blue);
  padding: 12px 20px; margin: 20px 0;
  background: rgba(0,212,255,0.05);
  border-radius: 0 8px 8px 0;
  font-style: italic;
}
.article-body ul, .article-body ol {
  margin: 12px 0 16px 24px;
}
.article-body li { margin-bottom:6px; }
.article-img {
  width:100%; border-radius:12px; margin:24px 0;
}
.article-tags { margin-top:32px; display:flex; gap:8px; flex-wrap:wrap; }
.article-tags .tag {
  padding: 4px 14px; border-radius:20px; font-size:0.8rem;
  background: rgba(0,212,255,0.1); color: var(--accent-blue);
  border: 1px solid rgba(0,212,255,0.2);
}

/* ========== 页脚 ========== */
.main-footer {
  background: rgba(0,0,0,0.3);
  border-top: 1px solid var(--glass-border);
  padding: 48px 0 24px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap:32px;
  margin-bottom: 32px;
}
.footer-brand h4 { font-size:1.1rem; font-weight:700; margin-bottom:8px; }
.footer-brand p { font-size:0.85rem; color:var(--text-secondary); }
.footer-col h5 { font-size:0.95rem; font-weight:600; margin-bottom:12px; }
.footer-col ul { list-style:none; }
.footer-col li { margin-bottom:8px; }
.footer-col a { color:var(--text-secondary); font-size:0.85rem; }
.footer-col a:hover { color:var(--accent-blue); }
.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding-top: 20px; text-align:center;
  font-size:0.8rem; color:var(--text-muted);
}
.footer-bottom .update-time { margin-top:6px; }

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .nav-links { display:none; }
  .nav-links.active {
    display:flex; flex-direction:column;
    position:absolute; top:64px; left:0; right:0;
    background: rgba(10,14,39,0.95);
    padding:20px; gap:16px;
    border-bottom: 1px solid var(--glass-border);
  }
  .mobile-toggle { display:block; }
  .hero-title { font-size:1.8rem; }
  .hero-subtitle { font-size:0.95rem; }
  .metrics-grid { grid-template-columns: repeat(2,1fr); gap:12px; }
  .cards-grid { grid-template-columns: 1fr; }
  .cards-grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap:24px; }
  .hero-section { padding: 100px 0 40px; }
  .article-header h1 { font-size:1.5rem; }
  .dashboard-panel { padding:20px; }
  .metric-value { font-size:1.3rem; }
  .glass-card { padding:20px; }
}

@media (max-width: 480px) {
  .metrics-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-title { font-size:1.5rem; }
  .nav-logo { font-size:1rem; }
}

/* ========== 懒加载 ========== */
.lazy { opacity:0; transition: opacity 0.5s; }
.lazy.loaded { opacity:1; }

/* ========== 滚动动画 ========== */
.fade-in {
  opacity:0; transform:translateY(20px);
  transition: opacity 0.6s, transform 0.6s;
}
.fade-in.visible { opacity:1; transform:translateY(0); }