/* ==========================================================================
   飞鸟云 (FEINIAO CLOUD) - 空间拟态与流体极光样式体系 (Spatial Aero Glass & Aurora)
   深度遵循设计要求：
   - 零图标库 / 零通用剪贴画 / 零粗糙 Emoji
   - 空间毛玻璃材质 (Multi-layered Frosted Glass) + 1px 镜面顶部高光
   - 交互式鼠标径向反光追踪 (--mouse-x, --mouse-y)
   - 浮动胶囊导航 (Floating Pill Glass Navbar) 与平滑滑块指示器
   - 全端响应式自适应 (@media)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计变量系统 - 默认白天模式 (Light Mode - Ethereal Aero Glass)
   -------------------------------------------------------------------------- */
:root {
  --bg-cosmos: #f8fafc;
  --bg-aurora-1: rgba(56, 189, 248, 0.09);
  --bg-aurora-2: rgba(99, 102, 241, 0.07);
  --bg-aurora-3: rgba(14, 165, 233, 0.05);

  --glass-surface: rgba(255, 255, 255, 0.75);
  --glass-surface-hover: rgba(255, 255, 255, 0.9);
  --glass-border: rgba(15, 23, 42, 0.08);
  --glass-specular: rgba(255, 255, 255, 0.95);
  --glass-highlight: rgba(37, 99, 235, 0.12);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --accent-cyan: #0284c7;
  --accent-indigo: #4f46e5;
  --accent-emerald: #059669;
  --accent-amber: #d97706;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-glow: rgba(37, 99, 235, 0.28);

  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --blur-glass: 24px;
  --shadow-spatial: 0 16px 40px -12px rgba(15, 23, 42, 0.08), 0 0 1px 1px rgba(15, 23, 42, 0.04);
  --shadow-glow: 0 0 35px rgba(37, 99, 235, 0.25);

  --container-width: 1240px;
  --transition-fluid: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   夜间模式 (Dark Mode - Deep Twilight Cosmos & Bioluminescent Aurora)
   -------------------------------------------------------------------------- */
[data-theme="dark"] {
  --bg-cosmos: #060913;
  --bg-aurora-1: rgba(56, 189, 248, 0.14);
  --bg-aurora-2: rgba(99, 102, 241, 0.12);
  --bg-aurora-3: rgba(168, 85, 247, 0.08);

  --glass-surface: rgba(255, 255, 255, 0.035);
  --glass-surface-hover: rgba(255, 255, 255, 0.065);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-specular: rgba(255, 255, 255, 0.24);
  --glass-highlight: rgba(56, 189, 248, 0.2);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #8492a6;
  --text-inverse: #060913;

  --accent-cyan: #38bdf8;
  --accent-indigo: #818cf8;
  --accent-emerald: #34d399;
  --accent-amber: #fbbf24;

  --primary: #38bdf8;
  --primary-hover: #7dd3fc;
  --primary-glow: rgba(56, 189, 248, 0.35);

  --shadow-spatial: 0 20px 50px -15px rgba(0, 0, 0, 0.7), 0 0 1px 1px rgba(255, 255, 255, 0.05);
  --shadow-glow: 0 0 40px rgba(56, 189, 248, 0.3);
}

/* --------------------------------------------------------------------------
   2. 基础重置与平滑滚动
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-cosmos);
  color: var(--text-primary);
  line-height: 1.68;
  overflow-x: hidden;
  position: relative;
  transition: background-color 0.4s ease, color 0.4s ease;
}

/* 背景全视口 Canvas 气流粒子系统 */
.bg-airflow-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
}

/* 极光网格渐变层 (Aurora Mesh Gradients) */
.aurora-bg-mesh {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -2;
  overflow: hidden;
}

.aurora-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.8;
  animation: drift 20s infinite alternate ease-in-out;
}

.aurora-orb-1 {
  width: 650px;
  height: 650px;
  top: -150px;
  left: 20%;
  background: var(--bg-aurora-1);
}

.aurora-orb-2 {
  width: 550px;
  height: 550px;
  top: 30%;
  right: 10%;
  background: var(--bg-aurora-2);
  animation-duration: 25s;
}

.aurora-orb-3 {
  width: 450px;
  height: 450px;
  bottom: 10%;
  left: 15%;
  background: var(--bg-aurora-3);
  animation-duration: 30s;
}

@keyframes drift {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 40px) scale(1.1); }
  100% { transform: translate(-40px, 80px) scale(0.95); }
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 28px;
  padding-right: 28px;
}

.section {
  padding: 108px 0;
  position: relative;
}

.text-center {
  text-align: center;
}

/* 几何极简状态标签 (无 Emoji / 无图标库) */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: var(--glass-surface);
  backdrop-filter: blur(var(--blur-glass));
  -webkit-backdrop-filter: blur(var(--blur-glass));
  border: 1px solid var(--glass-border);
  border-top: 1px solid var(--glass-specular);
  color: var(--accent-cyan);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 20px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
}

.geometric-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  display: inline-block;
}

.section-title {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   3. 浮动胶囊空间玻璃导航栏 (Floating Pill Glass Navbar)
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 18px;
  left: 0;
  right: 0;
  z-index: 1000;
  pointer-events: none; /* 让容器外部点击穿透 */
}

.floating-pill-nav {
  pointer-events: auto;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px 8px 22px;
  background: var(--glass-surface);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1px solid var(--glass-border);
  border-top: 1px solid var(--glass-specular);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-spatial);
  transition: var(--transition-fluid);
  max-width: 1180px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  user-select: none;
}

.logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-indigo));
  box-shadow: 0 0 10px var(--accent-cyan);
}

.logo-en {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-muted);
  border-left: 1px solid var(--glass-border);
  padding-left: 8px;
  margin-left: 2px;
}

/* 导航链接滑块指示器系统 */
.nav-links-wrapper {
  position: relative;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  position: relative;
  z-index: 2;
  list-style: none;
}

.nav-link {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  display: inline-block;
  white-space: nowrap;
  transition: color 0.25s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-glider {
  position: absolute;
  top: 3px;
  left: 0;
  height: calc(100% - 6px);
  border-radius: var(--radius-full);
  background: var(--glass-highlight);
  border: 1px solid var(--glass-border);
  pointer-events: none;
  z-index: 1;
  transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
  opacity: 0;
}

/* 导航动作区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 昼夜模式切换按钮 (精致纯净透明，平滑渐变，无表情符号) */
.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  border-top: 1px solid var(--glass-specular);
  color: var(--text-secondary);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  transition: var(--transition-fluid);
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn:hover {
  transform: rotate(25deg) scale(1.08);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 16px var(--primary-glow);
}

.theme-toggle-btn svg {
  width: 18px;
  height: 18px;
}

.icon-sun { display: block; }
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; color: #fbbf24; }

/* 按钮体系 (CTA 符合无障碍与 SEO 规范) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  font-size: 14.5px;
  font-weight: 700;
  border-radius: var(--radius-full);
  min-height: 44px;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  transition: var(--transition-fluid);
  position: relative;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--primary) 100%);
  color: #ffffff;
  box-shadow: 0 4px 18px var(--primary-glow);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px var(--primary-glow);
}

.btn-secondary {
  background: var(--glass-surface);
  backdrop-filter: blur(var(--blur-glass));
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  border-top: 1px solid var(--glass-specular);
}

.btn-secondary:hover {
  background: var(--glass-surface-hover);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  min-height: 38px;
  font-size: 13.5px;
}

.btn-lg {
  padding: 16px 36px;
  min-height: 52px;
  font-size: 16px;
}

/* --------------------------------------------------------------------------
   4. 空间主视觉区 (Spatial Hero Showcase)
   -------------------------------------------------------------------------- */
.hero {
  padding-top: 175px;
  padding-bottom: 90px;
  text-align: center;
  position: relative;
}

.hero-editorial-title {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.04em;
  margin-bottom: 22px;
}

.hero-editorial-title .brand-gradient {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-indigo) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-en-tag {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3.5px;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 10px;
}

.hero-lead-desc {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 780px;
  margin: 0 auto 38px;
}

.hero-cta-dock {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   5. 交互式测速与吞吐量模拟器码头 (Interactive Throughput Simulator)
   -------------------------------------------------------------------------- */
.simulator-dock {
  max-width: 960px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  padding: 36px 36px 30px;
  background: var(--glass-surface);
  backdrop-filter: blur(var(--blur-glass));
  -webkit-backdrop-filter: blur(var(--blur-glass));
  border: 1px solid var(--glass-border);
  border-top: 1px solid var(--glass-specular);
  box-shadow: var(--shadow-spatial);
  position: relative;
  overflow: hidden;
}

/* 模式切换药丸组 */
.simulator-mode-pills {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.mode-pill {
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  transition: var(--transition-fluid);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.mode-pill:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.mode-pill.active {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-indigo));
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 16px var(--primary-glow);
}

/* 动态波浪视窗 */
.wave-canvas-window {
  width: 100%;
  height: 110px;
  position: relative;
  margin: 18px 0;
  overflow: hidden;
}

.wave-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.wave-line-1 {
  fill: none;
  stroke: var(--accent-cyan);
  stroke-width: 2.2;
  filter: drop-shadow(0 0 8px var(--accent-cyan));
}

.wave-line-2 {
  fill: none;
  stroke: var(--accent-indigo);
  stroke-width: 1.8;
  opacity: 0.7;
}

/* 实时遥测指标读数栏 */
.telemetry-readouts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--glass-border);
}

.telemetry-item {
  text-align: center;
}

.telemetry-label {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.telemetry-number {
  font-size: 1.65rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  transition: all 0.25s ease;
}

/* --------------------------------------------------------------------------
   6. 镜面反光毛玻璃 Bento 栅格 (Specular Hover Glass Bento Grid)
   -------------------------------------------------------------------------- */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

/* 拟态高光卡片 (含鼠标坐标反光追踪) */
.specular-glass {
  background: var(--glass-surface);
  backdrop-filter: blur(var(--blur-glass));
  -webkit-backdrop-filter: blur(var(--blur-glass));
  border: 1px solid var(--glass-border);
  border-top: 1px solid var(--glass-specular);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
  box-shadow: var(--shadow-spatial);
}

.specular-glass:hover {
  transform: translateY(-5px);
  border-color: var(--glass-specular);
  box-shadow: var(--shadow-spatial), 0 0 30px var(--glass-highlight);
}

/* 鼠标跟随的高光聚光灯效果 */
.specular-glass::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: inherit;
  background: radial-gradient(320px circle at var(--mouse-x, -999px) var(--mouse-y, -999px), var(--glass-highlight), transparent 75%);
  pointer-events: none;
  opacity: 0.8;
  transition: opacity 0.3s ease;
  z-index: 1;
}

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

/* 不对称 Bento 跨列布局 */
.bento-span-2 {
  grid-column: span 2;
}

.bento-header-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.bento-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.bento-desc {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.bento-metric-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--glass-highlight);
  border: 1px solid var(--glass-border);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-top: 22px;
}

/* --------------------------------------------------------------------------
   7. 流媒体与 AI 支持图卡 (纯排版与微晶几何徽章，严禁粗糙表情)
   -------------------------------------------------------------------------- */
.unlocks-spatial-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 56px;
}

.unlock-specular-card {
  padding: 44px 38px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.unlock-specular-card.streaming {
  border-top: 1px solid rgba(229, 9, 20, 0.5);
}

.unlock-specular-card.ai {
  border-top: 1px solid rgba(56, 189, 248, 0.5);
}

.platform-pill-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0;
}

.platform-pill {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  transition: var(--transition-fluid);
}

.platform-pill:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.status-capsule-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: var(--glass-highlight);
  border: 1px solid var(--glass-border);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-cyan);
}

/* --------------------------------------------------------------------------
   8. 全球云节点交互式选择器 (Global Cloud Node Selector)
   -------------------------------------------------------------------------- */
.region-tabs-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 40px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.region-tab {
  padding: 9px 22px;
  border-radius: var(--radius-full);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  border-top: 1px solid var(--glass-specular);
  transition: var(--transition-fluid);
}

.region-tab:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.region-tab.active {
  background: var(--primary);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.nodes-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.node-card {
  padding: 24px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.node-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
}

.node-city {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
}

.node-code {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.node-latency {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-emerald);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

/* 负载进度条 */
.node-load-wrap {
  margin: 14px 0 18px;
}

.node-load-info {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-weight: 600;
}

.load-track {
  width: 100%;
  height: 6px;
  background: var(--glass-border);
  border-radius: 9999px;
  overflow: hidden;
}

.load-bar {
  height: 100%;
  border-radius: 9999px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-indigo));
}

.simulate-route-btn {
  width: 100%;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: var(--glass-surface);
  border: 1px solid var(--glass-border);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-secondary);
  transition: var(--transition-fluid);
}

.simulate-route-btn:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  background: var(--glass-highlight);
}

/* 探测脉冲动画 */
.node-card.route-pulse::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.25), transparent);
  animation: pulseAcross 0.85s ease-out;
  pointer-events: none;
}

@keyframes pulseAcross {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* --------------------------------------------------------------------------
   9. 真实套餐价格对比表 (Realistic Reference Pricing)
   -------------------------------------------------------------------------- */
.pricing-spatial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 60px;
  align-items: stretch;
}

.pricing-spatial-card,
.specular-glass.pricing-spatial-card {
  padding: 46px 34px 40px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: visible; /* 必须为 visible，防止顶部热门推荐标签被截断 */
}

.pricing-spatial-card.popular {
  border-color: var(--accent-cyan);
  box-shadow: 0 16px 45px -10px var(--primary-glow);
  transform: scale(1.02);
}

.pricing-popular-pill {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-indigo) 100%);
  color: #ffffff;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.8px;
  white-space: nowrap;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px var(--primary-glow);
  border: 1px solid rgba(255, 255, 255, 0.45);
  z-index: 10;
  pointer-events: none;
}

.price-display-wrap {
  margin: 24px 0 28px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.price-currency {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
}

.price-amount {
  font-size: 3.4rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
  letter-spacing: -0.04em;
}

.price-unit {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 600;
}

.pricing-spec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 36px;
  flex-grow: 1;
}

.pricing-spec-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.spec-check-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 6px var(--accent-emerald);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   10. 用户评价与 FAQ (底部的常见问题解答)
   -------------------------------------------------------------------------- */
.reviews-spatial-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-top: 56px;
}

.review-specular-card {
  padding: 28px 24px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-rating-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 14px;
}

.rating-indicator-point {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #f59e0b;
  box-shadow: 0 0 6px rgba(245, 158, 11, 0.6);
}

.faq-spatial-container {
  max-width: 860px;
  margin: 56px auto 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-specular-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-fluid);
}

.faq-specular-item summary {
  padding: 22px 28px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}

.faq-specular-item summary::-webkit-details-marker {
  display: none;
}

.faq-toggle-arrow {
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.faq-specular-item[open] .faq-toggle-arrow {
  transform: rotate(-135deg);
  border-color: var(--accent-cyan);
}

.faq-body-content {
  padding: 0 28px 24px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* --------------------------------------------------------------------------
   11. 规范页脚 (Footer - 严格仅保留四个指定标题)
   -------------------------------------------------------------------------- */
.footer {
  padding: 64px 0 48px;
  margin-top: 60px;
  border-top: 1px solid var(--glass-border);
  background: var(--glass-surface);
  backdrop-filter: blur(var(--blur-glass));
  position: relative;
  z-index: 10;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
}

.footer-link:hover {
  color: var(--accent-cyan);
}

.footer-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-cyan);
  transition: width 0.3s ease;
}

.footer-link:hover::after {
  width: 100%;
}

.footer-copy {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* --------------------------------------------------------------------------
   12. 移动端与全平台响应式适配 (@media)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .bento-span-2 {
    grid-column: span 2;
  }
  .nodes-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-spatial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-spatial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .floating-pill-nav {
    padding: 8px 16px;
    margin: 0 12px;
  }
  .nav-links-wrapper {
    display: none; /* 移动端精简超长导航，专注核心动作与昼夜切换 */
  }
  .hero {
    padding-top: 130px;
    padding-bottom: 60px;
  }
  .hero-editorial-title {
    font-size: 2.35rem;
  }
  .hero-lead-desc {
    font-size: 1.05rem;
  }
  .telemetry-readouts {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
  .bento-grid,
  .unlocks-spatial-grid,
  .nodes-cards-grid,
  .pricing-spatial-grid,
  .reviews-spatial-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .bento-span-2 {
    grid-column: span 1;
  }
  .pricing-spatial-card.popular {
    transform: none;
  }
  .footer-nav {
    gap: 24px;
  }
}

@media (max-width: 480px) {
  .section-title {
    font-size: 2rem;
  }
  .hero-cta-dock {
    flex-direction: column;
    width: 100%;
  }
  .hero-cta-dock .btn {
    width: 100%;
  }
  .simulator-dock {
    padding: 24px 18px;
  }
}