/* ==========================================================================
   白月光机场官网 (Baiyueguang Airport VPN) 主样式表
   主题设计：全站纯白月光亮色系 (Moonlight Pearl Light Theme) + 信号青光芒
   设计规范：去除黑色背景、左右结构首屏、无 Emoji 设计、全站高灵敏动态光效
   ========================================================================== */

:root {
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-surface-hover: #e2e8f0;
  
  --border-subtle: #e2e8f0;
  --border-active: #0284c7;
  --border-light: rgba(2, 132, 199, 0.25);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --accent-cyan: #0284c7;
  --accent-cyan-light: #06b6d4;
  --accent-cyan-dim: #e0f2fe;
  --accent-cyan-glow: rgba(2, 132, 199, 0.25);
  
  --status-green: #059669;
  --status-green-dim: #ecfdf5;
  --status-yellow: #d97706;
  --status-blue: #0284c7;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", Consolas, "Fira Code", monospace;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 32px rgba(2, 132, 199, 0.12);
  --shadow-glow: 0 0 25px rgba(6, 182, 212, 0.25);
  
  --transition-smooth: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  --container-max: 1240px;
}

/* 减少动画模式 */
body.reduced-motion *,
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

body {
  font-family: var(--font-sans);
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

/* 全站动态背景水波月光点缀 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 15% 15%, rgba(224, 242, 254, 0.7) 0%, transparent 45%),
    radial-gradient(circle at 85% 25%, rgba(207, 250, 254, 0.55) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(241, 245, 249, 0.8) 0%, transparent 60%);
  z-index: -2;
  pointer-events: none;
}

/* 精致轻科技网格纹理底纹 */
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(rgba(2, 132, 199, 0.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(2, 132, 199, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: -1;
  pointer-events: none;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-smooth);
}

ul, ol {
  list-style: none;
}

button, input, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* 容器与布局 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 85px 0;
  position: relative;
}

.section-divider {
  border-bottom: 1px solid var(--border-subtle);
}

/* 徽章与排版 */
.cinematic-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  background: var(--accent-cyan-dim);
  border: 1px solid #bae6fd;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 18px;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: 0 2px 6px rgba(2, 132, 199, 0.08);
}

.cinematic-eyebrow .pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  display: inline-block;
  animation: pulseLight 2s infinite ease-in-out;
}

@keyframes pulseLight {
  0%, 100% { opacity: 0.4; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.3); }
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 52px auto;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 14px;
  line-height: 1.3;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition-smooth);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--accent-cyan);
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.28);
}

.btn-primary:hover {
  background-color: #0369a1;
  box-shadow: 0 8px 24px rgba(2, 132, 199, 0.4);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: #f8fafc;
  border-color: #cbd5e1;
  transform: translateY(-2px);
}

.btn-outline-cyan {
  background: #ffffff;
  color: var(--accent-cyan);
  border: 1px solid #bae6fd;
}

.btn-outline-cyan:hover {
  background: var(--accent-cyan-dim);
  border-color: var(--accent-cyan);
}

/* 顶部导航栏 - 纯白亮色磨砂玻璃 */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.04);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-logo .moon-crescent {
  width: 22px;
  height: 22px;
  position: relative;
  border-radius: 50%;
  box-shadow: inset -5px 2px 0 0 #0284c7;
  transform: rotate(-25deg);
}

.brand-logo .tag-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 7px;
  background: var(--accent-cyan-dim);
  border: 1px solid #bae6fd;
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 1;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: var(--transition-smooth);
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

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

/* ==========================================================================
   首屏 HERO 区域 - 左右分栏布局与动态月光光轨
   ========================================================================== */
.hero-section-lr {
  position: relative;
  min-height: 82vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 60px 0;
  background: transparent;
}

/* 背景动态粒子画布 */
.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 3;
}

.hero-left {
  max-width: 660px;
}

.hero-manifesto {
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
}

.hero-manifesto::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 2px;
  background-color: var(--accent-cyan);
}

.hero-main-title {
  font-size: 3.2rem;
  font-weight: 900;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #0f172a;
}

.hero-main-title .brand-accent {
  color: #0284c7;
  display: block;
  margin-top: 4px;
  background: linear-gradient(135deg, #0284c7 0%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-main-desc {
  font-size: 1.08rem;
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 34px;
}

.hero-main-desc strong {
  color: var(--text-primary);
  font-weight: 600;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding-top: 26px;
  border-top: 1px solid var(--border-subtle);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 1.7rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #0f172a;
  letter-spacing: -0.02em;
}

.stat-value span {
  color: var(--accent-cyan);
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  margin-top: 2px;
}

/* 首屏右侧插图视觉卡片 (亮色月光主题) */
.hero-right {
  position: relative;
}

.hero-visual-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid #bae6fd;
  background: #ffffff;
  box-shadow: 0 20px 45px rgba(2, 132, 199, 0.15), 0 4px 12px rgba(0, 0, 0, 0.04);
}

.hero-visual-card img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  display: block;
}

.hero-visual-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(15, 23, 42, 0.5) 100%);
  pointer-events: none;
}

.hero-visual-badge-top {
  position: absolute;
  top: 18px;
  right: 18px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid #bae6fd;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: #0284c7;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
  font-weight: 700;
}

.hero-visual-badge-top .live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--status-green);
  box-shadow: 0 0 8px var(--status-green);
  display: inline-block;
  animation: pulseLight 1.8s infinite ease-in-out;
}

.hero-visual-bottom-info {
  position: absolute;
  bottom: 20px;
  left: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.hero-visual-title {
  font-size: 1rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hero-visual-status {
  font-size: 0.8rem;
  color: var(--status-green);
  font-family: var(--font-mono);
  font-weight: 700;
}

.hero-visual-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   全球节点中枢面板 (纯白珍珠卡片 + 信号青高光)
   ========================================================================== */
.node-display-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(2, 132, 199, 0.08), 0 4px 8px rgba(0, 0, 0, 0.02);
}

.node-display-card:hover {
  border-color: #bae6fd;
}

.node-header-bar {
  padding: 16px 24px;
  background: #f8fafc;
  border-bottom: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.node-header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--status-green);
  font-weight: 700;
}

.node-header-status .live-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--status-green);
  box-shadow: 0 0 8px var(--status-green);
  display: inline-block;
  animation: pulseLight 1.8s infinite ease-in-out;
}

.node-regions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
  padding: 30px;
}

.node-item-box {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-md);
  padding: 22px;
  transition: var(--transition-smooth);
}

.node-item-box:hover {
  border-color: #0284c7;
  transform: translateY(-3px);
  background: #ffffff;
  box-shadow: 0 12px 24px rgba(2, 132, 199, 0.1);
}

.node-city-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.node-region-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  background: #e0f2fe;
  color: #0284c7;
  border: 1px solid #bae6fd;
  margin-right: 8px;
}

.node-city-name {
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  color: #0f172a;
}

.node-ping-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: var(--status-green-dim);
  color: var(--status-green);
  border: 1px solid #a7f3d0;
  font-weight: 700;
}

.node-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.node-tag {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background: #ffffff;
  border: 1px solid #e2e8f0;
  color: var(--text-secondary);
}

.node-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   核心优势卡片网格 (纯白高光卡片)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 26px;
}

.feature-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
}

.feature-card:hover {
  border-color: #0284c7;
  transform: translateY(-4px);
  box-shadow: 0 16px 30px rgba(2, 132, 199, 0.12);
}

.feature-tag-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: #0284c7;
  background: #e0f2fe;
  border: 1px solid #bae6fd;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.feature-spec-list {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid #f1f5f9;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feature-spec-item {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-spec-item::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #0284c7;
}

/* ==========================================================================
   智能线路架构 (亮色版)
   ========================================================================== */
.routing-architecture-box {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: 0 8px 24px rgba(2, 132, 199, 0.06);
}

.routing-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.routing-step-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-md);
  padding: 26px;
  transition: var(--transition-smooth);
}

.routing-step-card:hover {
  background: #ffffff;
  border-color: #bae6fd;
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.08);
}

.routing-step-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #0284c7;
  font-weight: 700;
  margin-bottom: 12px;
  display: block;
}

.routing-step-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #0f172a;
}

.routing-step-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   全平台支持展示 (亮色白卡片)
   ========================================================================== */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 18px;
}

.platform-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: var(--transition-smooth);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.03);
}

.platform-card:hover {
  border-color: #0284c7;
  transform: translateY(-2px);
  background: #ffffff;
  box-shadow: 0 10px 20px rgba(2, 132, 199, 0.1);
}

.platform-tag-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: #0284c7;
  background: #e0f2fe;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 12px;
}

.platform-name {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 6px;
  color: #0f172a;
}

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

/* ==========================================================================
   价格板块：浅色系设计 (亲民实惠价格 + 珍珠白亮色卡片)
   ========================================================================== */
.pricing-section-light {
  background: #f1f5f9;
  color: #0f172a;
  padding: 90px 0;
  border-top: 1px solid #e2e8f0;
  border-bottom: 1px solid #e2e8f0;
}

.pricing-section-light .cinematic-eyebrow {
  background: #e0f2fe;
  color: #0284c7;
  border-color: #bae6fd;
}

.pricing-section-light .cinematic-eyebrow .pulse-dot {
  background-color: #0284c7;
  box-shadow: 0 0 8px #0284c7;
}

.pricing-section-light .section-title {
  color: #0f172a;
}

.pricing-section-light .section-desc {
  color: #475569;
}

.pricing-grid-light {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  align-items: stretch;
}

.pricing-card-light {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 36px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-smooth);
  position: relative;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.pricing-card-light:hover {
  border-color: #0284c7;
  transform: translateY(-4px);
  box-shadow: 0 16px 30px rgba(2, 132, 199, 0.12);
}

.pricing-card-light.featured {
  border: 2px solid #0284c7;
  box-shadow: 0 12px 35px rgba(2, 132, 199, 0.18);
  background: #ffffff;
}

.pricing-badge-light {
  position: absolute;
  top: -12px;
  right: 24px;
  background: #0284c7;
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pricing-name-light {
  font-size: 1.3rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 6px;
}

.pricing-intro-light {
  font-size: 0.85rem;
  color: #64748b;
  min-height: 40px;
  line-height: 1.5;
}

.pricing-cost-light {
  margin: 20px 0;
  padding-bottom: 20px;
  border-bottom: 1px solid #f1f5f9;
}

.pricing-amount-light {
  font-size: 2.6rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #0f172a;
  line-height: 1;
}

.pricing-amount-light span {
  font-size: 0.95rem;
  font-weight: 500;
  color: #64748b;
}

.pricing-period-light {
  font-size: 0.82rem;
  color: #0284c7;
  font-weight: 600;
  margin-top: 6px;
}

.pricing-features-light {
  display: flex;
  flex-direction: column;
  gap: 11px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.pricing-feature-item-light {
  font-size: 0.88rem;
  color: #334155;
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-feature-item-light.highlight {
  color: #0f172a;
  font-weight: 600;
}

.pricing-check-icon {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #e0f2fe;
  color: #0284c7;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  flex-shrink: 0;
}

.btn-pricing-primary {
  background-color: #0284c7;
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
}

.btn-pricing-primary:hover {
  background-color: #0369a1;
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.45);
  transform: translateY(-2px);
}

.btn-pricing-secondary {
  background-color: #f8fafc;
  color: #0f172a;
  border: 1px solid #cbd5e1;
}

.btn-pricing-secondary:hover {
  background-color: #f1f5f9;
  border-color: #94a3b8;
  transform: translateY(-2px);
}

/* ==========================================================================
   适合人群网格 (亮色卡片)
   ========================================================================== */
.audiences-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}

.audience-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.03);
}

.audience-card:hover {
  border-color: #0284c7;
  transform: translateY(-3px);
  box-shadow: 0 14px 26px rgba(2, 132, 199, 0.1);
}

.audience-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: #0284c7;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
  margin-bottom: 10px;
  display: block;
}

.audience-title {
  font-size: 1.18rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #0f172a;
}

.audience-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   使用指南 / 3步快速连接 (亮色卡片)
   ========================================================================== */
.steps-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.tutorial-step-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  position: relative;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.03);
}

.tutorial-step-card:hover {
  border-color: #0284c7;
  transform: translateY(-3px);
  box-shadow: 0 14px 26px rgba(2, 132, 199, 0.1);
}

.step-number-tag {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 900;
  color: #0284c7;
  margin-bottom: 12px;
  display: block;
  opacity: 0.9;
}

.step-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #0f172a;
}

.step-card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.step-code-preview {
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #0284c7;
  overflow-x: auto;
  white-space: nowrap;
}

/* ==========================================================================
   用户评价 (亮色卡片)
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.03);
}

.testimonial-card:hover {
  border-color: #0284c7;
  box-shadow: 0 12px 24px rgba(2, 132, 199, 0.1);
}

.testimonial-stars {
  color: #d97706;
  font-size: 0.88rem;
  letter-spacing: 2px;
  margin-bottom: 14px;
  font-weight: 600;
}

.testimonial-quote {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #e0f2fe;
  border: 1px solid #bae6fd;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #0284c7;
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #0f172a;
}

.author-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   FAQ 手风琴 (亮色卡片)
   ========================================================================== */
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-smooth);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.02);
}

.faq-item:hover {
  border-color: #bae6fd;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.faq-question .faq-icon {
  font-size: 1.2rem;
  color: var(--accent-cyan);
  transition: transform 0.3s ease;
  font-family: var(--font-mono);
  font-weight: 700;
}

.faq-item.active .faq-question .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 800px;
  padding: 0 24px 22px 24px;
}

/* ==========================================================================
   文章目录与博客网格 (亮色卡片)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 26px;
}

.article-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
}

.article-card:hover {
  border-color: #0284c7;
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(2, 132, 199, 0.12);
}

.article-thumb-wrapper {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: #e2e8f0;
}

.article-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.article-card:hover .article-thumb {
  transform: scale(1.05);
}

.article-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  color: #0284c7;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid #bae6fd;
}

.article-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  gap: 14px;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.article-summary {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 18px;
  flex-grow: 1;
}

.article-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: #0284c7;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-link:hover {
  gap: 10px;
  color: #0369a1;
}

/* ==========================================================================
   最终行动呼吁 (Final CTA - 亮色优雅月光面板)
   ========================================================================== */
.final-cta-section {
  position: relative;
  background: #f8fafc;
  overflow: hidden;
  padding: 85px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.cta-box {
  background: #ffffff;
  border: 1px solid #bae6fd;
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 36px rgba(2, 132, 199, 0.1);
}

.cta-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, #0284c7, #06b6d4, transparent);
}

.cta-box-title {
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  color: #0f172a;
}

.cta-box-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 34px auto;
  line-height: 1.8;
}

.cta-box-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ==========================================================================
   底部页脚 (纯净白亮底色)
   ========================================================================== */
.site-footer {
  background: #ffffff;
  padding: 70px 0 34px 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-top: 1px solid #e2e8f0;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 44px;
  margin-bottom: 50px;
}

.footer-brand p {
  margin-top: 14px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
  max-width: 340px;
}

.footer-col-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer-link {
  color: var(--text-secondary);
  font-size: 0.88rem;
  transition: var(--transition-smooth);
}

.footer-link:hover {
  color: #0284c7;
}

.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 18px;
}

/* ==========================================================================
   文章详情页排版 (亮色主题)
   ========================================================================== */
.article-page-header {
  padding: 50px 0 36px 0;
  border-bottom: 1px solid #e2e8f0;
  background: #ffffff;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.breadcrumbs a:hover {
  color: #0284c7;
}

.article-content-wrapper {
  padding: 50px 0 90px 0;
}

.article-grid-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 44px;
}

.article-body-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #334155;
}

.article-body-content h1 {
  font-size: 2.3rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 18px;
  line-height: 1.3;
}

.article-body-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #0f172a;
  margin: 40px 0 18px 0;
  padding-bottom: 10px;
  border-bottom: 1px solid #e2e8f0;
}

.article-body-content h3 {
  font-size: 1.22rem;
  font-weight: 700;
  color: #1e293b;
  margin: 28px 0 14px 0;
}

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

.article-body-content ul, .article-body-content ol {
  margin-bottom: 22px;
  padding-left: 24px;
}

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

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

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

.article-body-content strong {
  color: #0f172a;
}

.article-body-content blockquote {
  border-left: 3px solid #0284c7;
  background: #f0f9ff;
  padding: 16px 22px;
  margin: 26px 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: #334155;
  border: 1px solid #bae6fd;
  border-left-width: 4px;
}

.article-body-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: #0284c7;
  border: 1px solid #e2e8f0;
}

.article-body-content pre {
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: var(--radius-md);
  padding: 18px;
  overflow-x: auto;
  margin: 22px 0;
}

.article-body-content pre code {
  background: none;
  padding: 0;
  border: none;
  color: #f8fafc;
}

.article-body-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.92rem;
}

.article-body-content th, .article-body-content td {
  padding: 13px 16px;
  border: 1px solid #e2e8f0;
  text-align: left;
}

.article-body-content th {
  background: #f8fafc;
  color: #0f172a;
  font-weight: 600;
}

.article-body-content tr:nth-child(even) {
  background: #f8fafc;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.sidebar-widget {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.03);
}

.sidebar-widget-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid #e2e8f0;
  color: var(--text-primary);
}

.related-articles-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.related-article-link {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  display: block;
}

.related-article-link:hover {
  color: #0284c7;
}

/* 响应式样式适配 */
@media (max-width: 1100px) {
  .nav-menu {
    gap: 12px;
  }
  .nav-link {
    font-size: 0.86rem;
  }
}

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-visual-card img {
    height: 380px;
  }
  .routing-steps-grid {
    grid-template-columns: 1fr;
  }
  .steps-container {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .article-grid-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border-subtle);
    gap: 16px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.06);
  }
  .nav-menu.active {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-main-title {
    font-size: 2.2rem;
  }
  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
}