/* ========================================
   暗色高级情报感门户 - 主样式表
   ======================================== */

:root {
  --color-bg: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-card: rgba(18, 18, 30, 0.85);
  --color-bg-glass: rgba(255, 255, 255, 0.03);
  --color-primary: #e63946;
  --color-primary-glow: rgba(230, 57, 70, 0.4);
  --color-accent: #ffd700;
  --color-accent-glow: rgba(255, 215, 0, 0.3);
  --color-text: #e8e8ec;
  --color-text-muted: #8a8a9a;
  --color-text-dim: #5a5a6a;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-glow: rgba(230, 57, 70, 0.3);
  --color-neon-red: #ff2d55;
  --color-neon-gold: #ffcc00;
  --color-success: #00c853;
  --color-warning: #ff9100;
  --color-danger: #ff1744;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px var(--color-primary-glow);
  --shadow-neon: 0 0 12px var(--color-neon-red), 0 0 24px rgba(255, 45, 85, 0.2);
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;
}

/* 重置与基础 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

ul, ol {
  list-style: none;
}

/* 容器 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* 头部导航 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.site-logo img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
}

.site-logo .logo-text {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 桌面导航 */
.nav-desktop {
  display: none;
}

.nav-desktop ul {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav-desktop a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.4rem 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--color-text);
}

.nav-desktop a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-normal);
}

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

/* 移动端菜单按钮 */
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition-normal);
  border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端导航面板 */
.nav-mobile {
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 10, 15, 0.98);
  backdrop-filter: blur(20px);
  padding: var(--spacing-lg);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  z-index: 999;
  overflow-y: auto;
}

.nav-mobile.open {
  transform: translateX(0);
}

.nav-mobile ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-mobile a {
  display: block;
  padding: 0.9rem 1rem;
  color: var(--color-text);
  font-size: 1.05rem;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.nav-mobile a:hover {
  background: var(--color-bg-glass);
  color: var(--color-accent);
}

/* 英雄区域 */
.hero-section {
  padding: 8rem 0 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
  opacity: 0.3;
  pointer-events: none;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
  line-height: 1.2;
  position: relative;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.8;
}

/* 搜索框 */
.search-box {
  max-width: 560px;
  margin: 0 auto var(--spacing-lg);
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 1rem 3.5rem 1rem 1.25rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  color: var(--color-text);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-box input:focus {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.search-box input::placeholder {
  color: var(--color-text-dim);
}

.search-box button {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  border: none;
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  transition: background var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-box button:hover {
  background: var(--color-neon-red);
  box-shadow: var(--shadow-neon);
}

.search-suggestions {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.5rem;
  display: none;
  z-index: 100;
}

.search-suggestions.visible {
  display: block;
}

.search-suggestions a {
  display: block;
  padding: 0.6rem 1rem;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.search-suggestions a:hover {
  background: var(--color-bg-glass);
  color: var(--color-text);
}

/* 玻璃拟态卡片 */
.glass-card {
  background: var(--color-bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

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

/* 霓虹边框卡片 */
.neon-card {
  background: var(--color-bg-card);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  position: relative;
  overflow: hidden;
}

.neon-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent), var(--color-primary));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.6;
  transition: opacity var(--transition-normal);
}

.neon-card:hover::before {
  opacity: 1;
}

/* 数据卡片 */
.data-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
}

.data-card .data-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-accent);
  font-family: var(--font-mono);
  margin-bottom: 0.25rem;
}

.data-card .data-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* 网格布局 */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
}

/* 区块标题 */
.section-header {
  margin-bottom: var(--spacing-lg);
}

.section-header h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
}

.section-header p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* 标签 */
.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 20px;
  text-transform: uppercase;
}

.tag-red {
  background: rgba(230, 57, 70, 0.15);
  color: var(--color-primary);
  border: 1px solid rgba(230, 57, 70, 0.3);
}

.tag-gold {
  background: rgba(255, 215, 0, 0.1);
  color: var(--color-accent);
  border: 1px solid rgba(255, 215, 0, 0.3);
}

.tag-green {
  background: rgba(0, 200, 83, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(0, 200, 83, 0.3);
}

.tag-orange {
  background: rgba(255, 145, 0, 0.1);
  color: var(--color-warning);
  border: 1px solid rgba(255, 145, 0, 0.3);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  justify-content: center;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-neon-red);
  box-shadow: var(--shadow-neon);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

.btn-gold {
  background: linear-gradient(135deg, var(--color-accent), #ff9100);
  color: #000;
}

.btn-gold:hover {
  box-shadow: 0 0 20px var(--color-accent-glow);
}

/* CTA区域 */
.cta-section {
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.cta-box {
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.1), rgba(255, 215, 0, 0.05));
  border: 1px solid var(--color-border-glow);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl) var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--color-primary-glow), transparent);
  opacity: 0.3;
  pointer-events: none;
}

.cta-box h2 {
  font-size: 1.8rem;
  margin-bottom: var(--spacing-sm);
}

.cta-box p {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* 榜单/列表 */
.rank-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.rank-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}

.rank-item:hover {
  border-color: var(--color-border-glow);
}

.rank-num {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 50%;
  background: var(--color-bg-secondary);
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.rank-item:nth-child(1) .rank-num {
  background: var(--color-primary);
  color: #fff;
}

.rank-item:nth-child(2) .rank-num {
  background: var(--color-accent);
  color: #000;
}

.rank-item:nth-child(3) .rank-num {
  background: var(--color-warning);
  color: #000;
}

.rank-title {
  flex: 1;
  font-size: 0.95rem;
  font-weight: 500;
}

.rank-meta {
  font-size: 0.8rem;
  color: var(--color-text-dim);
}

/* 选项卡切换 */
.tab-nav {
  display: flex;
  gap: 0.5rem;
  margin-bottom: var(--spacing-md);
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.tab-btn {
  padding: 0.5rem 1.2rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.tab-btn.active,
.tab-btn:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-question {
  padding: 1rem 1.25rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--color-bg-glass);
}

.faq-question::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.faq-item.open .faq-question::after {
  content: '−';
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 1.25rem 1rem;
}

.faq-answer p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* 面包屑 */
.breadcrumb {
  padding: 5.5rem 0 1rem;
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.breadcrumb a {
  color: var(--color-text-muted);
}

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

.breadcrumb span {
  margin: 0 0.4rem;
  color: var(--color-text-dim);
}

/* 页脚 */
.site-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-col h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-md);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.footer-bottom a {
  color: var(--color-text-muted);
}

/* 返回顶部 */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-neon);
}

/* PWA安装提示 */
.pwa-prompt {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 1rem;
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  z-index: 1100;
}

.pwa-prompt.visible {
  display: flex;
}

.pwa-prompt p {
  font-size: 0.9rem;
  color: var(--color-text);
}

.pwa-prompt .btn-install {
  padding: 0.5rem 1rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
}

.pwa-prompt .btn-dismiss {
  padding: 0.5rem 1rem;
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
}

/* 提交成功提示 */
.toast {
  position: fixed;
  top: 5rem;
  right: 1rem;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-success);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  color: var(--color-success);
  font-size: 0.9rem;
  transform: translateX(120%);
  transition: transform var(--transition-normal);
  z-index: 1200;
}

.toast.visible {
  transform: translateX(0);
}

/* 内容区域 */
.page-content {
  padding: 2rem 0 4rem;
}

.page-content h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
}

.page-content h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.page-content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: var(--spacing-md) 0 var(--spacing-xs);
}

.page-content p {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
  line-height: 1.8;
}

/* 表单 */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--color-text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.8rem 1rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

/* 时间线 */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-md);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.6rem;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-bg);
}

.timeline-date {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  margin-bottom: 0.25rem;
}

.timeline-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.timeline-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* 合规提醒条 */
.compliance-bar {
  background: rgba(255, 145, 0, 0.08);
  border: 1px solid rgba(255, 145, 0, 0.2);
  border-radius: var(--radius-md);
  padding: 0.8rem 1.2rem;
  font-size: 0.85rem;
  color: var(--color-warning);
  margin: var(--spacing-md) 0;
}

/* 响应式断点 */
@media (min-width: 768px) {
  .nav-desktop {
    display: block;
  }

  .menu-toggle {
    display: none;
  }

  .hero-title {
    font-size: 3.5rem;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-content h1 {
    font-size: 2.5rem;
  }
}

@media (min-width: 1024px) {
  .hero-section {
    padding: 10rem 0 5rem;
  }

  .section-header h2 {
    font-size: 1.8rem;
  }
}

/* 动画 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* 脉冲指示器 */
.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  position: relative;
}

.pulse-dot::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: rgba(0, 200, 83, 0.3);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0; }
}

/* 风险标签系统 */
.risk-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
}

.risk-high {
  background: rgba(255, 23, 68, 0.15);
  color: var(--color-danger);
}

.risk-medium {
  background: rgba(255, 145, 0, 0.15);
  color: var(--color-warning);
}

.risk-low {
  background: rgba(0, 200, 83, 0.15);
  color: var(--color-success);
}

/* 专题网格 */
.topic-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  aspect-ratio: 16/9;
}

.topic-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.topic-card .topic-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--spacing-md);
}

.topic-card .topic-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.25rem;
}

.topic-card .topic-desc {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
}