/* =====================================================
   易支付官网 - 主样式表
   科技蓝主色调 + 玻璃态 + 优质动画 + 科技感
   ===================================================== */

/* ---------- CSS 变量 ---------- */
:root {
  /* 冷色调 - 冰蓝主题 */
  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --primary-dark: #2563eb;
  --secondary: #06b6d4;
  --accent: #6366f1;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  /* 高亮度背景 */
  --bg-base: #ffffff;
  --bg-primary: #ffffff;
  --bg-secondary: #f1f5f9;
  --bg-card: #f8fafc;
  --bg-dark: #0f172a;
  --bg-dark-card: #1e293b;

  /* 冷色调文字 */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-light: #f8fafc;

  /* 冷色边框 */
  --border: rgba(59, 130, 246, 0.15);
  --border-dark: rgba(255, 255, 255, 0.06);

  --shadow-sm: 0 1px 3px rgba(59, 130, 246, 0.08), 0 1px 2px rgba(59, 130, 246, 0.05);
  --shadow-md: 0 4px 20px rgba(59, 130, 246, 0.12);
  --shadow-lg: 0 20px 60px rgba(59, 130, 246, 0.15);
  --shadow-glow: 0 0 60px rgba(59, 130, 246, 0.3);
  --shadow-glow-accent: 0 0 60px rgba(99, 102, 241, 0.3);

  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-xl: 40px;

  --nav-h: 76px;
  --transition: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --bg-base: #0a0f1e;
  --bg-primary: #0a0f1e;
  --bg-secondary: #111827;
  --bg-card: #111827;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --border: rgba(255,255,255,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,.4);
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-light); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ---------- 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(26,110,245,.1);
  border: 1px solid rgba(26,110,245,.2);
  padding: 5px 14px;
  border-radius: 50px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 文字颜色工具类 */
.text-primary { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-light { color: var(--text-light) !important; }
.text-white { color: #ffffff !important; }
.text-success { color: var(--success) !important; }
.text-warning { color: var(--warning) !important; }
.text-danger { color: var(--danger) !important; }

/* 背景颜色工具类 */
.bg-primary { background: var(--bg-primary) !important; }
.bg-secondary { background: var(--bg-secondary) !important; }
.bg-card { background: var(--bg-card) !important; }
.bg-white { background: #ffffff !important; }
.bg-dark { background: var(--bg-dark) !important; }

/* ---------- 布局 ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 100px 0; }

.text-center { text-align: center; }
.text-center .section-subtitle { margin: 0 auto; }

/* ---------- 导航 ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: all var(--transition);
}

.navbar.scrolled {
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(24px) saturate(200%);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  box-shadow: 0 1px 0 var(--border), var(--shadow-sm);
}

[data-theme="dark"] .navbar.scrolled {
  background: rgba(2, 6, 23, 0.92);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  transition: transform var(--transition);
}

.nav-logo:hover {
  transform: scale(1.02);
}

.nav-logo .logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #3b82f6 0%, #60a5fa 50%, #06b6d4 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 900;
  font-size: 1.2rem;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
  position: relative;
  overflow: hidden;
}

.nav-logo .logo-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.3) 50%, transparent 100%);
  animation: shimmer 3s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(148, 163, 184, 0.06);
  padding: 6px;
  border-radius: 50px;
  border: 1px solid rgba(148, 163, 184, 0.15);
  backdrop-filter: blur(10px);
}

.nav-menu a {
  padding: 10px 22px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.nav-menu a::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  opacity: 0;
  transition: opacity var(--transition);
  border-radius: 50px;
  z-index: -1;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: white;
  transform: translateY(-1px);
}

.nav-menu a:hover::before,
.nav-menu a.active::before {
  opacity: 1;
}

.nav-menu a:hover,
.nav-menu a.active {
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.4);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all var(--transition);
  color: var(--text-secondary);
}

.theme-toggle:hover {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  border-color: transparent;
  transform: rotate(180deg) scale(1.1);
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.4);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* 移动端菜单 - PC端默认隐藏 */
.mobile-menu {
  display: none;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.6s var(--transition);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 50%, #06b6d4 100%);
  background-size: 200% 200%;
  color: white;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4), 0 0 0 1px rgba(59, 130, 246, 0.3);
  animation: gradient-shift 3s ease infinite;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.btn-primary:hover {
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.5), 0 0 0 1px rgba(59, 130, 246, 0.4);
  transform: translateY(-3px) scale(1.02);
  color: white;
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(59, 130, 246, 0.05);
  transform: translateY(-3px);
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.1);
}

.btn-outline-white {
  background: rgba(59, 130, 246, 0.05);
  color: var(--primary);
  border: 1.5px solid rgba(59, 130, 246, 0.3);
  backdrop-filter: blur(12px);
}

.btn-outline-white:hover {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.15);
}

.btn-sm { padding: 10px 22px; font-size: 0.875rem; }
.btn-lg { padding: 18px 44px; font-size: 1.1rem; border-radius: var(--radius-lg); }

/* ---------- Hero 区域 ---------- */
.hero {
  min-height: 100vh;
  padding-top: calc(var(--nav-h) + 60px);
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  background: #ffffff;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

/* 粒子画布 */
#particles-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  animation: float 10s ease-in-out infinite;
}

.hero-orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.5) 0%, transparent 70%);
  top: -200px; right: -100px;
}

.hero-orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.4) 0%, transparent 70%);
  bottom: -100px; left: -50px;
  animation-delay: -4s;
}

.hero-orb-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.4) 0%, transparent 70%);
  top: 50%; left: 40%;
  animation-delay: -7s;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1) rotate(0deg); }
  33% { transform: translateY(-40px) scale(1.08) rotate(5deg); }
  66% { transform: translateY(-20px) scale(0.95) rotate(-3deg); }
}

/* 网格背景 */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.06) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 70%);
}

/* 扫描线效果 */
.hero-scanline {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(59, 130, 246, 0.03) 2px,
    rgba(59, 130, 246, 0.03) 4px
  );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 50px;
  padding: 8px 20px;
  font-size: 0.9rem;
  color: #2563eb;
  margin-bottom: 32px;
  backdrop-filter: blur(10px);
}

.hero-badge .dot {
  width: 10px; height: 10px;
  background: linear-gradient(135deg, #10b981, #34d399);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
  box-shadow: 0 0 12px #10b981, 0 0 24px rgba(16, 185, 129, 0.5);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}

.hero-title {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 28px;
  letter-spacing: -0.03em;
}

.hero-title .highlight {
  background: linear-gradient(90deg, #3b82f6 0%, #60a5fa 50%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.hero-title .highlight::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #3b82f6 0%, #60a5fa 50%, #06b6d4 100%);
  border-radius: 2px;
  opacity: 0.5;
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 48px;
  line-height: 1.9;
  font-weight: 400;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* 统计数据区 */
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid rgba(59, 130, 246, 0.15);
  flex-wrap: wrap;
}

.hero-stat-item .stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 6px;
}

.hero-stat-item .stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Hero 右侧看板 */
.hero-visual {
  position: relative;
  z-index: 2;
}

.dashboard-card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.9) 100%);
  backdrop-filter: blur(30px) saturate(200%);
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: 
    0 30px 80px rgba(59, 130, 246, 0.15), 
    0 0 0 1px rgba(59, 130, 246, 0.08),
    var(--shadow-glow);
  transform: perspective(1200px) rotateY(-12deg) rotateX(5deg);
  transition: all 0.6s var(--transition);
  position: relative;
  overflow: hidden;
}

.dashboard-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.dashboard-card:hover {
  transform: perspective(1200px) rotateY(-5deg) rotateX(2deg) translateY(-10px);
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 
    0 40px 100px rgba(59, 130, 246, 0.2), 
    0 0 0 1px rgba(59, 130, 246, 0.15),
    0 0 60px rgba(59, 130, 246, 0.15);
}

.dash-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(59, 130, 246, 0.1);
}

.dash-title { font-size: 0.9rem; color: var(--text-secondary); font-weight: 500; }

.dash-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: #10b981;
}

.dash-status::before {
  content: '';
  width: 6px; height: 6px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 6px #10b981;
  animation: pulse-dot 2s ease-in-out infinite;
}

.dash-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.dash-metric {
  background: rgba(59, 130, 246, 0.05);
  border: 1px solid rgba(59, 130, 246, 0.1);
  border-radius: var(--radius-md);
  padding: 16px;
}

.dash-metric .metric-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.dash-metric .metric-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.dash-metric .metric-change {
  font-size: 0.78rem;
  margin-top: 4px;
}

.metric-up { color: #10b981; }
.metric-down { color: #ef4444; }

/* 迷你柱状图 */
.mini-chart {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 50px;
  margin-top: 20px;
}

.mini-chart .bar {
  flex: 1;
  background: linear-gradient(to top, var(--primary), var(--secondary));
  border-radius: 3px 3px 0 0;
  opacity: 0.7;
  transition: opacity var(--transition);
  animation: grow-bar 1s ease-out backwards;
}

.mini-chart .bar:hover { opacity: 1; }

@keyframes grow-bar {
  from { transform: scaleY(0); transform-origin: bottom; }
  to   { transform: scaleY(1); }
}

/* 浮动徽章 */
.hero-badge-float {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  font-size: 0.85rem;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  animation: float 6s ease-in-out infinite;
}

.badge-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

/* ---------- 数据信任区 ---------- */
.trust-section {
  padding: 80px 0;
  background: 
    linear-gradient(135deg, #eff6ff 0%, #f0f9ff 50%, #eef2ff 100%);
  position: relative;
  overflow: hidden;
}

.trust-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(99, 102, 241, 0.06) 0%, transparent 50%);
}

.trust-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: rgba(59, 130, 246, 0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(59, 130, 246, 0.12);
}

.trust-item {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  padding: 50px 40px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
  border: 1px solid rgba(59, 130, 246, 0.1);
}

.trust-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition);
}

.trust-item:hover { 
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 20px 40px rgba(59, 130, 246, 0.1);
}

.trust-item:hover::before {
  opacity: 1;
}

.trust-number {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.trust-unit {
  font-size: 1.6rem;
  background: linear-gradient(135deg, #60a5fa, #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.trust-label {
  font-size: 1rem;
  color: #64748b;
  line-height: 1.6;
}

/* ---------- 功能卡片区 ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 70px;
}

.feature-card {
  background: linear-gradient(145deg, var(--bg-card) 0%, rgba(248, 250, 252, 0.8) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.06) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.feature-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 
    0 30px 60px rgba(59, 130, 246, 0.12),
    0 0 0 1px rgba(59, 130, 246, 0.15);
  border-color: rgba(59, 130, 246, 0.3);
}

.feature-card:hover::before { opacity: 1; }
.feature-card:hover::after { opacity: 1; }

.feature-icon {
  width: 64px; height: 64px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 24px;
  transition: all var(--transition);
  position: relative;
}

.feature-icon::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: calc(var(--radius-md) + 4px);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  opacity: 0;
  z-index: -1;
  transition: opacity var(--transition);
  filter: blur(12px);
}

.feature-card:hover .feature-icon::after {
  opacity: 0.4;
}

.feature-icon-blue { 
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(59, 130, 246, 0.04));
  color: #3b82f6;
}
.feature-icon-cyan  { 
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.12), rgba(6, 182, 212, 0.04));
  color: #06b6d4;
}
.feature-icon-purple{ 
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(99, 102, 241, 0.04));
  color: #6366f1;
}
.feature-icon-green { 
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.12), rgba(16, 185, 129, 0.04));
  color: #10b981;
}
.feature-icon-orange{ 
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.12), rgba(245, 158, 11, 0.04));
  color: #f59e0b;
}
.feature-icon-pink  { 
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.12), rgba(236, 72, 153, 0.04));
  color: #ec4899;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ---------- 优势区 ---------- */
.advantages-section {
  background: linear-gradient(160deg, #ffffff 0%, rgba(59, 130, 246, 0.03) 50%, rgba(99, 102, 241, 0.02) 100%);
  position: relative;
  overflow: hidden;
}

.advantages-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.04) 0%, transparent 50%);
  pointer-events: none;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-top: 70px;
  position: relative;
}

.advantage-item {
  text-align: center;
  padding: 44px 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, var(--bg-card) 0%, rgba(248, 250, 252, 0.8) 100%);
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.advantage-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.06) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition);
}

.advantage-item:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 
    0 25px 50px rgba(59, 130, 246, 0.08),
    0 0 0 1px rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.25);
}

.advantage-item:hover::before {
  opacity: 1;
}

.adv-number {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #3b82f6 0%, #6366f1 50%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.adv-label {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.adv-label small {
  display: block;
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------- 方案区 ---------- */
.plan-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 70px;
}

.plan-card {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 44px 36px;
  background: linear-gradient(145deg, var(--bg-card) 0%, rgba(248, 250, 252, 0.5) 100%);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.plan-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #3b82f6, #06b6d4, #6366f1);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.plan-card:hover::before {
  transform: scaleX(1);
}

.plan-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 30px 60px rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.25);
}

.plan-card.featured {
  border-color: var(--primary);
  background: linear-gradient(160deg, rgba(59, 130, 246, 0.06) 0%, rgba(99, 102, 241, 0.03) 100%);
  box-shadow: 
    0 0 0 1px var(--primary),
    0 20px 50px rgba(59, 130, 246, 0.12),
    0 0 60px rgba(59, 130, 246, 0.08);
  transform: scale(1.05);
}

.plan-card.featured:hover {
  transform: scale(1.05) translateY(-10px);
  box-shadow: 
    0 0 0 1px var(--primary),
    0 30px 70px rgba(59, 130, 246, 0.15),
    0 0 80px rgba(59, 130, 246, 0.1);
}

.plan-badge {
  display: inline-block;
  background: linear-gradient(90deg, #3b82f6, #6366f1);
  color: white;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 24px;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.plan-price {
  font-size: 3rem;
  font-weight: 900;
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}

.plan-price sup { font-size: 1.2rem; vertical-align: super; }
.plan-price sub { font-size: 1rem; color: var(--text-muted); }

.plan-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  padding: 10px 0;
  color: var(--text-secondary);
}

.plan-features li::before {
  content: '';
  display: inline-flex;
  width: 22px; height: 22px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.1));
  color: #10b981;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.plan-card .btn { width: 100%; justify-content: center; margin-top: 36px; }

/* ---------- 文章区 ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 60px;
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.news-card-cover {
  height: 200px;
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.news-card-cover .cover-pattern {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='white' fill-opacity='0.05'%3E%3Crect x='0' y='0' width='20' height='20'/%3E%3Crect x='20' y='20' width='20' height='20'/%3E%3C/g%3E%3C/svg%3E");
}

.news-card-body { padding: 24px; }

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

.news-category {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(59, 130, 246, 0.1);
  padding: 3px 10px;
  border-radius: 50px;
}

.news-date {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.news-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.5;
}

.news-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.7;
}

.news-card-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.read-more {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.read-more:hover { gap: 8px; }

.news-views {
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ---------- 资讯中心分类标签 ---------- */
.news-category-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.news-tab {
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.news-tab::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
}

.news-tab:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.2);
  border-color: rgba(59, 130, 246, 0.3);
}

.news-tab.active {
  color: white;
  border-color: transparent;
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

.news-tab.active::before {
  opacity: 1;
}

.news-tab span {
  position: relative;
  z-index: 1;
}

/* ---------- 文章列表页 ---------- */
.page-hero {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  padding: calc(var(--nav-h) + 60px) 0 60px;
  text-align: center;
  color: white;
}

.page-hero h1 { color: white; font-size: 2.5rem; margin-bottom: 12px; }
.page-hero p { color: rgba(255,255,255,.65); font-size: 1.1rem; }

.articles-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  padding: 60px 0;
}

.article-list-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 20px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  transition: all var(--transition);
}

.article-list-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(59, 130, 246, 0.25);
}

.article-list-cover {
  height: 110px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #3b82f6, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  overflow: hidden;
}

.article-list-body {}

.article-list-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 8px 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-list-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 侧边栏 */
.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
}

.widget-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}

.sidebar-category-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.sidebar-article-item {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

.sidebar-article-thumb {
  width: 60px; height: 50px;
  border-radius: 6px;
  background: linear-gradient(135deg, #3b82f6, #06b6d4);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

/* ---------- 新闻列表页 ---------- */
.category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 48px;
  padding: 20px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.filter-btn {
  padding: 12px 28px;
  border: 1px solid var(--border);
  border-radius: 30px;
  background: var(--bg-base);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.filter-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.35);
}

.news-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 32px;
}

.news-list-item {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

.news-list-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(59, 130, 246, 0.2);
}

.news-list-image {
  height: 200px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  position: relative;
}

.news-list-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,0.3));
}

.news-list-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.news-list-item:hover .news-list-image img {
  transform: scale(1.08);
}

.news-list-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
}

.news-list-content {
  display: flex;
  flex-direction: column;
  padding: 24px;
  flex: 1;
}

.news-list-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.news-category {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(6, 182, 212, 0.1));
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 20px;
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.news-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.news-list-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.5;
  color: var(--text-primary);
}

.news-list-title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.news-list-title a:hover {
  color: var(--primary);
}

.news-list-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-list-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.read-more {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition);
}

.read-more:hover {
  gap: 10px;
  color: var(--primary-dark);
}

.news-views {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

@media (max-width: 768px) {
  .news-list {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .news-list-image {
    height: 180px;
  }
  
  .category-filter {
    gap: 8px;
    padding: 16px;
  }
  
  .filter-btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
}

/* ---------- 文章详情页 ---------- */
.article-detail {
  padding: calc(var(--nav-h) + 40px) 0 80px;
}

.article-detail-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
}

.article-main {}

.article-cover-full {
  height: 400px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  margin-bottom: 36px;
  position: relative;
  overflow: hidden;
}

.article-cover-full .cover-pattern {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='white' fill-opacity='0.04'%3E%3Ccircle cx='30' cy='30' r='20'/%3E%3C/g%3E%3C/svg%3E");
}

.article-header {
  margin-bottom: 32px;
}

.article-header h1 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  margin: 16px 0 20px;
  line-height: 1.3;
}

.article-info {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  padding: 16px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.article-content {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--text-primary);
  margin-top: 28px;
}

.article-content h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 36px 0 14px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  color: var(--text-primary);
}

.article-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 28px 0 10px;
}

.article-content p { margin-bottom: 18px; }

.article-content ul, .article-content ol {
  padding-left: 24px;
  margin-bottom: 18px;
}

.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }

.article-content li { margin-bottom: 6px; }

.article-content pre {
  background: var(--bg-dark);
  color: #e2e8f0;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 18px;
}

.article-content code {
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.88em;
}

.article-content pre code {
  background: none;
  color: inherit;
  padding: 0;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  padding: 12px 20px;
  background: rgba(59, 130, 246, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 18px;
  color: var(--text-secondary);
}

.article-content strong { color: var(--text-primary); font-weight: 700; }

/* ---------- 分页 ---------- */
.pagination {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin: 40px 0;
  flex-wrap: wrap;
}

.page-btn {
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.page-btn:hover, .page-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
}

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  padding: 120px 0;
  background: 
    linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #312e81 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 30% 20%, rgba(59, 130, 246, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 70% 80%, rgba(99, 102, 241, 0.15) 0%, transparent 40%);
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(96, 165, 250, 0.4), transparent);
}

.cta-banner h2 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  color: white;
  margin-bottom: 20px;
  position: relative;
  background: linear-gradient(135deg, #fff 0%, #bfdbfe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-banner p {
  font-size: 1.2rem;
  color: rgba(255,255,255,.75);
  margin-bottom: 44px;
  position: relative;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}

.cta-btns {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,.6);
  padding: 70px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .nav-logo { color: white; margin-bottom: 16px; }
.footer-brand .nav-logo .logo-icon {
  background: linear-gradient(135deg, #3b82f6, #06b6d4);
}

.footer-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 260px;
  margin-bottom: 20px;
}

.footer-social { display: flex; gap: 10px; }

.social-btn {
  width: 36px; height: 36px;
  background: rgba(255,255,255,.07);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: rgba(255,255,255,.6);
  transition: all var(--transition);
}

.social-btn:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: white;
  margin-bottom: 18px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 0.88rem;
  color: rgba(255,255,255,.5);
  transition: color var(--transition);
}

.footer-col ul li a:hover { color: white; }

.footer-divider {
  border: none;
  border-top: 1px solid rgba(255,255,255,.07);
  margin-bottom: 24px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
}

/* ---------- 后台通用 ---------- */
.admin-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.admin-sidebar {
  background: var(--bg-dark);
  color: rgba(255,255,255,.75);
  padding: 24px 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.admin-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px 24px;
  border-bottom: 1px solid rgba(255,255,255,.07);
  margin-bottom: 20px;
  font-size: 1.1rem;
  font-weight: 700;
  color: white;
  text-decoration: none;
}

.admin-logo .logo-icon {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, #3b82f6, #06b6d4);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 900;
  font-size: 1rem;
}

.admin-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 20px;
  font-size: 0.9rem;
  color: rgba(255,255,255,.55);
  transition: all var(--transition);
  border-left: 3px solid transparent;
}

.admin-nav a:hover, .admin-nav a.active {
  background: rgba(255,255,255,.06);
  color: white;
  border-left-color: var(--primary);
}

.admin-main { background: var(--bg-base); }

.admin-topbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 0 32px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.admin-content { padding: 32px; }

.admin-page-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 28px;
}

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

.admin-card-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
}

.admin-table { width: 100%; border-collapse: collapse; }

.admin-table th, .admin-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.admin-table th {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: rgba(0,0,0,.02);
}

.admin-table tr:hover td { background: rgba(59, 130, 246, 0.03); }
.admin-table tr:last-child td { border-bottom: none; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 600;
}

.badge-success { background: rgba(16,185,129,.15); color: #10b981; }
.badge-warning { background: rgba(245,158,11,.15); color: #f59e0b; }
.badge-danger  { background: rgba(239,68,68,.15);  color: #ef4444; }
.badge-info    { background: rgba(59, 130, 246, 0.12);  color: var(--primary); }

/* ---------- 表单 ---------- */
.form-group {
  margin-bottom: 22px;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 11px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: all var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
}

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

select.form-control { cursor: pointer; }

/* 富文本区域 */
.editor-wrapper {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.editor-toolbar {
  background: rgba(0,0,0,.03);
  border-bottom: 1px solid var(--border);
  padding: 8px 12px;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.editor-btn {
  width: 32px; height: 32px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.editor-btn:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

#editor-content {
  min-height: 350px;
  padding: 20px;
  outline: none;
  font-size: 0.97rem;
  line-height: 1.8;
  color: var(--text-primary);
}

#editor-content:empty::before {
  content: attr(data-placeholder);
  color: var(--text-muted);
}

/* ---------- 统计卡片 ---------- */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--transition);
}

.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

.stat-card-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.stat-card-val {
  font-size: 1.7rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 4px;
}

.stat-card-label {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---------- 消息提示 ---------- */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 0.9rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.alert-success { background: rgba(16,185,129,.12); color: #065f46; border: 1px solid rgba(16,185,129,.25); }
.alert-danger  { background: rgba(239,68,68,.1);   color: #991b1b; border: 1px solid rgba(239,68,68,.2); }
.alert-info    { background: rgba(59, 130, 246, 0.1);  color: #1e3a8a; border: 1px solid rgba(59, 130, 246, 0.2); }

[data-theme="dark"] .alert-success { color: #6ee7b7; }
[data-theme="dark"] .alert-danger  { color: #fca5a5; }
[data-theme="dark"] .alert-info    { color: #93c5fd; }

/* ---------- 登录页 ---------- */
.login-page {
  min-height: 100vh;
  background: linear-gradient(145deg, #0a0f1e 0%, #0d1b3e 50%, #0a2366 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: rgba(15, 25, 55, 0.75);
  backdrop-filter: blur(30px) saturate(180%);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  position: relative;
  z-index: 2;
}

.login-logo {
  text-align: center;
  margin-bottom: 36px;
}

.login-logo .logo-icon {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 900;
  color: white;
  margin: 0 auto 14px;
}

.login-logo h1 { font-size: 1.3rem; color: white; margin-bottom: 6px; }
.login-logo p  { font-size: 0.88rem; color: rgba(255,255,255,.4); }

.login-card .form-label { color: rgba(255,255,255,.6); }

.login-card .form-control {
  background: rgba(255,255,255,.07);
  border-color: rgba(255,255,255,.1);
  color: white;
}

.login-card .form-control:focus {
  border-color: var(--primary);
  background: rgba(255,255,255,.1);
}

.login-card .form-control::placeholder { color: rgba(255,255,255,.3); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .features-grid, .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .plan-cards { grid-template-columns: 1fr; max-width: 480px; margin-left: auto; margin-right: auto; }
}

@media (max-width: 768px) {
  section { padding: 70px 0; }

  .nav-menu { display: none; }
  .hamburger { display: flex; }

  .mobile-menu {
    position: fixed;
    inset: 0;
    background: rgba(255,255,255,.98);
    backdrop-filter: blur(20px);
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transform: translateY(-100%);
    transition: transform var(--transition);
  }

  .mobile-menu.open { transform: translateY(0); }

  .mobile-menu a {
    font-size: 1.2rem;
    color: var(--text-secondary);
    padding: 12px 32px;
    width: 100%;
    text-align: center;
    border-radius: var(--radius-sm);
  }

  .mobile-menu a:hover { background: rgba(59, 130, 246, 0.08); color: var(--primary); }

  .hero { padding-top: calc(var(--nav-h) + 40px); }
  .hero-title { font-size: 2.2rem; }
  .dashboard-card { display: none; }
  .hero-stats { gap: 24px; }

  .trust-grid { grid-template-columns: 1fr; gap: 1px; }

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

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

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

  .articles-layout, .article-detail-layout { grid-template-columns: 1fr; }
  .sidebar { order: -1; }

  .article-list-item { grid-template-columns: 1fr; }
  .article-list-cover { height: 160px; }

  .footer-grid { 
    grid-template-columns: 1fr; 
    gap: 32px; 
    text-align: center;
  }
  
  .footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .footer-brand .nav-logo {
    justify-content: center;
  }
  
  .footer-desc {
    max-width: 100%;
    text-align: center;
  }
  
  .footer-social {
    justify-content: center;
  }
  
  .footer-col h4 {
    margin-bottom: 12px;
  }
  
  .footer-col ul li {
    margin-bottom: 8px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .admin-layout { grid-template-columns: 1fr; }
  .admin-sidebar { display: none; }

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

@media (max-width: 480px) {
  .advantages-grid { grid-template-columns: 1fr 1fr; }
  .stat-cards { grid-template-columns: 1fr 1fr; }
  .hero-cta { flex-direction: column; }
  .cta-btns { flex-direction: column; align-items: center; }
}

/* ---------- 动画 ---------- */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-up {
  opacity: 0;
  animation: fade-up 0.7s var(--transition) forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* Intersection Observer 动画 */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s var(--transition), transform 0.7s var(--transition);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }