/* ==========================================================================
   极客云 (JikeYun) - Style 8: 新拟物态磨砂透明风 (Liquid Glass / Neumorphic Cloud OS)
   透光磨砂亚克力 · 液体透镜折射 · 浮空分层拟物 · 云端操作系统级界面
   全原生极速性能 · 零依赖秒开 · 移动全端适配
   ========================================================================== */

:root {
  /* 云端操作系统基础色板 */
  --bg-dark: #060914;
  --bg-darker: #04060c;
  --bg-surface: #0a1024;
  
  /* 液态玻璃材质核心变量 (Liquid Glass Material Tokens) */
  --glass-bg: rgba(14, 22, 44, 0.52);
  --glass-bg-hover: rgba(20, 32, 64, 0.68);
  --glass-bg-card: rgba(12, 19, 38, 0.58);
  --glass-card-elevated: rgba(16, 26, 52, 0.65);
  --glass-pill: rgba(255, 255, 255, 0.06);
  --glass-pill-hover: rgba(255, 255, 255, 0.12);
  
  /* 镜面高光与微拟态边框 (Liquid Specular Highlights) */
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-border-hover: rgba(0, 242, 254, 0.35);
  --glass-border-specular: rgba(255, 255, 255, 0.28);
  --border-highlight: rgba(0, 242, 254, 0.5);
  
  /* 极客云发光光谱 (Cyber Cloud Luminescence) */
  --primary-cyan: #00f2fe;
  --primary-blue: #4facfe;
  --primary-indigo: #6366f1;
  --primary-purple: #8b5cf6;
  --aurora-pink: #f43f5e;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  
  /* 拟物立体投影与液态发光 (Neumorphic Layered Shadows) */
  --shadow-liquid-sm: 0 4px 16px 0 rgba(0, 0, 0, 0.3), inset 0 1px 1px 0 rgba(255, 255, 255, 0.25);
  --shadow-liquid-md: 0 12px 32px -4px rgba(0, 0, 0, 0.45), 0 4px 12px 0 rgba(0, 0, 0, 0.2), inset 0 1px 1px 0 rgba(255, 255, 255, 0.28);
  --shadow-liquid-lg: 0 20px 50px -10px rgba(0, 0, 0, 0.6), 0 8px 24px -4px rgba(0, 242, 254, 0.12), inset 0 1px 1.5px 0 rgba(255, 255, 255, 0.35);
  --shadow-liquid-hover: 0 24px 60px -8px rgba(0, 0, 0, 0.65), 0 0 35px 0 rgba(0, 242, 254, 0.25), inset 0 1px 2px 0 rgba(255, 255, 255, 0.45);
  --glow-cyan: 0 0 30px rgba(0, 242, 254, 0.35);
  --glow-pill: 0 4px 20px rgba(0, 242, 254, 0.3);
  
  /* 文本对比度梯度 */
  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  /* 倒角与交互物理曲线 (Liquid Spring Physics) */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s var(--ease-spring);
  --transition-normal: all 0.32s var(--ease-spring);
  --transition-slow: all 0.5s var(--ease-spring);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  /* 云端太空与全景深景深 */
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(0, 242, 254, 0.15) 0%, transparent 45%),
    radial-gradient(circle at 85% 25%, rgba(139, 92, 246, 0.16) 0%, transparent 48%),
    radial-gradient(circle at 50% 60%, rgba(79, 172, 254, 0.11) 0%, transparent 50%),
    radial-gradient(circle at 80% 85%, rgba(244, 63, 94, 0.1) 0%, transparent 45%);
  background-attachment: fixed;
}

/* 云端背景网格与操作系统微网格 (Cloud OS Mesh Backdrop) */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: -2;
}

/* 漂浮的液体光斑 (Floating Liquid Mesh Orbs) */
body::after {
  content: '';
  position: fixed;
  top: -20%;
  left: -20%;
  width: 140%;
  height: 140%;
  background: 
    radial-gradient(circle at 30% 25%, rgba(0, 242, 254, 0.13) 0%, transparent 35%),
    radial-gradient(circle at 70% 40%, rgba(124, 58, 237, 0.14) 0%, transparent 40%),
    radial-gradient(circle at 45% 80%, rgba(16, 185, 129, 0.08) 0%, transparent 35%);
  pointer-events: none;
  z-index: -1;
  animation: liquid-float 22s ease-in-out infinite alternate;
  filter: blur(40px);
}

@keyframes liquid-float {
  0% { transform: translate(0, 0) scale(1) rotate(0deg); }
  50% { transform: translate(-30px, 20px) scale(1.05) rotate(2deg); }
  100% { transform: translate(25px, -25px) scale(0.96) rotate(-2deg); }
}

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

ul {
  list-style: none;
}

img, svg {
  vertical-align: middle;
}

/* 统一布局容器 */
.container {
  width: 100%;
  max-width: 1220px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 液体流光渐变文字 (Liquid Gradient Text) */
.text-gradient {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 35%, #a78bfa 70%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
  animation: liquid-shimmer 7s linear infinite;
  display: inline-block;
}

.text-gradient-purple {
  background: linear-gradient(135deg, #a78bfa 0%, #c084fc 50%, #f472b6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

@keyframes liquid-shimmer {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ==========================================================================
   按钮规范 - 新拟物微触感与液态折射光效
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-normal);
  text-align: center;
  position: relative;
  overflow: hidden;
  user-select: none;
  white-space: nowrap;
}

/* 主按钮：液态霓虹青蓝胶囊 */
.btn-primary {
  background: linear-gradient(135deg, #00f2fe 0%, #3b82f6 50%, #8b5cf6 100%);
  color: #030712;
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 
    0 8px 25px -4px rgba(0, 242, 254, 0.5),
    0 2px 8px 0 rgba(59, 130, 246, 0.3),
    inset 0 1px 1.5px rgba(255, 255, 255, 0.7),
    inset 0 -1px 2px rgba(0, 0, 0, 0.2);
  letter-spacing: 0.3px;
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: skewX(-20deg);
  transition: 0.6s ease;
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 
    0 14px 34px -4px rgba(0, 242, 254, 0.65),
    0 4px 14px 0 rgba(139, 92, 246, 0.4),
    inset 0 1px 2px rgba(255, 255, 255, 0.9);
  color: #000;
}

.btn-primary:hover::after {
  left: 140%;
}

.btn-primary:active {
  transform: translateY(1px) scale(0.98);
  box-shadow: 0 4px 12px rgba(0, 242, 254, 0.35);
}

/* 次级按钮：高透磨砂亚克力玻璃 (Frosted Glass Pill) */
.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  color: var(--text-main);
  border: 1px solid var(--glass-border-specular);
  box-shadow: 
    0 4px 16px rgba(0, 0, 0, 0.25),
    inset 0 1px 1px rgba(255, 255, 255, 0.3),
    inset 0 -1px 1px rgba(0, 0, 0, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(0, 242, 254, 0.5);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 
    0 10px 25px rgba(0, 0, 0, 0.35),
    0 0 20px rgba(0, 242, 254, 0.2),
    inset 0 1px 1.5px rgba(255, 255, 255, 0.4);
}

.btn-secondary:active {
  transform: translateY(1px) scale(0.98);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.08rem;
  letter-spacing: 0.5px;
}

/* ==========================================================================
   顶部悬浮岛式导航栏 (Floating Island Cloud Dock Navbar)
   ========================================================================== */
.navbar {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1000;
  width: calc(100% - 32px);
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  background: rgba(10, 16, 36, 0.65);
  backdrop-filter: blur(28px) saturate(210%);
  -webkit-backdrop-filter: blur(28px) saturate(210%);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 
    0 16px 40px -10px rgba(0, 0, 0, 0.5),
    inset 0 1px 1px rgba(255, 255, 255, 0.28),
    inset 0 -1px 1px rgba(0, 0, 0, 0.3);
  transition: var(--transition-normal);
}

.navbar:hover {
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow: 
    0 20px 48px -8px rgba(0, 0, 0, 0.6),
    0 0 25px rgba(0, 242, 254, 0.15),
    inset 0 1px 1.5px rgba(255, 255, 255, 0.35);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0;
}

/* 品牌 Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.25) 0%, rgba(139, 92, 246, 0.25) 100%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 
    0 4px 14px rgba(0, 242, 254, 0.25),
    inset 0 1px 1px rgba(255, 255, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-normal);
}

.logo-icon svg {
  width: 22px;
  height: 22px;
  fill: var(--primary-cyan);
  filter: drop-shadow(0 2px 6px rgba(0, 242, 254, 0.6));
  transition: var(--transition-normal);
}

.brand-logo:hover .logo-icon {
  transform: rotate(6deg) scale(1.08);
  border-color: var(--primary-cyan);
  box-shadow: 0 0 22px rgba(0, 242, 254, 0.5);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 4px;
}

.nav-link:hover {
  color: #ffffff;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, #00f2fe, #a78bfa);
  box-shadow: 0 0 8px rgba(0, 242, 254, 0.8);
  transition: width 0.3s var(--ease-spring);
}

.nav-link:hover::after {
  width: 80%;
}

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

/* 原生汉堡按钮 (移动端隐藏/显示) */
#nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}

.nav-toggle-label span {
  width: 24px;
  height: 2px;
  background-color: var(--text-main);
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
}

/* ==========================================================================
   首屏横幅区 (Hero Section) - 云端操作系统主控台
   ========================================================================== */
.hero-section {
  padding-top: 170px;
  padding-bottom: 90px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 10;
}

/* 促销高亮标签：悬浮发光液体胶囊 */
.promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.3);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  color: #e0f2fe;
  margin-bottom: 30px;
  box-shadow: 
    0 4px 20px rgba(0, 242, 254, 0.15),
    inset 0 1px 1px rgba(255, 255, 255, 0.25);
  animation: badge-pulse 3s ease-in-out infinite alternate;
}

@keyframes badge-pulse {
  0% { transform: translateY(0); box-shadow: 0 4px 16px rgba(0, 242, 254, 0.15); }
  100% { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0, 242, 254, 0.28); }
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-emerald);
  border-radius: 50%;
  position: relative;
  box-shadow: 0 0 10px var(--accent-emerald);
}

.pulse-dot::before {
  content: '';
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border-radius: 50%;
  border: 2px solid var(--accent-emerald);
  animation: ring-pulse 1.8s infinite;
}

@keyframes ring-pulse {
  0% { transform: scale(0.6); opacity: 1; }
  100% { transform: scale(1.9); opacity: 0; }
}

.hero-title {
  font-size: clamp(2.3rem, 5.5vw, 4.4rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
  text-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 42px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 400;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

/* ==========================================================================
   云端操作系统实时节点状态舱 (Cloud OS Node Telemetry Island)
   ========================================================================== */
.cloud-node-dock {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  max-width: 960px;
  margin: 0 auto 45px auto;
  padding: 12px 20px;
  background: rgba(12, 18, 36, 0.5);
  backdrop-filter: blur(24px) saturate(190%);
  -webkit-backdrop-filter: blur(24px) saturate(190%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  box-shadow: 
    0 16px 36px -8px rgba(0, 0, 0, 0.4),
    inset 0 1px 1px rgba(255, 255, 255, 0.2);
}

.cloud-node-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.cloud-node-chip:hover {
  background: rgba(0, 242, 254, 0.12);
  border-color: rgba(0, 242, 254, 0.4);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 242, 254, 0.2);
}

.node-ping {
  color: var(--accent-emerald);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-weight: 700;
}

.ping-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
}

/* 信任指标栏：高透玻璃浮动条 */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  padding: 30px 40px;
  max-width: 860px;
  margin: 0 auto;
  border-radius: var(--radius-xl);
  background: rgba(14, 22, 44, 0.45);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 
    0 16px 40px -10px rgba(0, 0, 0, 0.45),
    inset 0 1px 1px rgba(255, 255, 255, 0.2);
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-num {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.stat-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==========================================================================
   核心优势卡片区 (Features Grid) - 透光磨砂亚克力玻璃
   ========================================================================== */
.section {
  padding: 95px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--primary-cyan);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.25);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(2rem, 3.8vw, 2.7rem);
  font-weight: 800;
  line-height: 1.22;
  margin-bottom: 18px;
  letter-spacing: -0.8px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-bottom: 35px;
}

/* 磨砂亚克力卡片 */
.feature-card {
  background: var(--glass-bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  box-shadow: var(--shadow-liquid-md);
}

/* 顶部液体反光流光边 */
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #00f2fe, #8b5cf6, transparent);
  opacity: 0;
  transition: var(--transition-normal);
}

/* 悬停光晕浸润效果 */
.feature-card:hover {
  transform: translateY(-8px) scale(1.008);
  background: var(--glass-bg-hover);
  border-color: rgba(0, 242, 254, 0.45);
  box-shadow: var(--shadow-liquid-hover);
}

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

.feature-icon-wrapper {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.16) 0%, rgba(139, 92, 246, 0.16) 100%);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 
    0 8px 20px -4px rgba(0, 242, 254, 0.3),
    inset 0 1px 1.5px rgba(255, 255, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: var(--transition-normal);
}

.feature-card:hover .feature-icon-wrapper {
  transform: scale(1.1) rotate(4deg);
  border-color: var(--primary-cyan);
  box-shadow: 0 0 25px rgba(0, 242, 254, 0.5);
}

.feature-icon {
  width: 30px;
  height: 30px;
  fill: var(--primary-cyan);
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.feature-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   流媒体 & AI 跨域解锁卡片 (Media & AI Showcase)
   ========================================================================== */
.media-ai-card {
  background: linear-gradient(135deg, rgba(16, 26, 54, 0.65) 0%, rgba(10, 16, 34, 0.75) 100%);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-xl);
  padding: 48px 44px;
  backdrop-filter: blur(32px) saturate(210%);
  -webkit-backdrop-filter: blur(32px) saturate(210%);
  box-shadow: 
    0 24px 60px -12px rgba(0, 0, 0, 0.6),
    0 0 35px rgba(0, 242, 254, 0.12),
    inset 0 1px 1.5px rgba(255, 255, 255, 0.35);
  margin-bottom: 35px;
}

.media-ai-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.media-title-wrap {
  display: flex;
  align-items: center;
  gap: 18px;
}

.media-icon-badge {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #00f2fe 0%, #3b82f6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(0, 242, 254, 0.4);
}

.media-icon-badge svg {
  width: 30px;
  height: 30px;
  fill: #000;
}

.media-title {
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.media-subtitle {
  font-size: 0.98rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.media-ai-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.media-feature-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.media-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.media-feature-item svg {
  width: 20px;
  height: 20px;
  fill: var(--primary-cyan);
  flex-shrink: 0;
  margin-top: 3px;
}

.pill-tags-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.pill-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.82rem;
  font-weight: 600;
  color: #e2e8f0;
}

.pill-tag svg {
  width: 14px;
  height: 14px;
  fill: var(--primary-cyan);
}

.media-badges-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.media-badge-item {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius-md);
  padding: 16px 12px;
  text-align: center;
  transition: var(--transition-normal);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.15);
}

.media-badge-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(0, 242, 254, 0.4);
  transform: translateY(-3px);
  box-shadow: 
    0 8px 20px rgba(0, 0, 0, 0.3),
    0 0 20px rgba(0, 242, 254, 0.25),
    inset 0 1px 1.5px rgba(255, 255, 255, 0.3);
}

.media-badge-item .badge-title {
  font-size: 0.94rem;
  font-weight: 800;
  display: block;
  color: #fff;
  margin-bottom: 2px;
}

.media-badge-item .badge-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   套餐定价区 (Pricing Section) - 悬浮液态玻璃平板 (Glass Tablets)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: stretch;
}

.pricing-card {
  background: var(--glass-bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 44px 34px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
  position: relative;
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  box-shadow: var(--shadow-liquid-md);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: var(--shadow-liquid-hover);
}

/* Featured VIP2 核心主推套餐：全彩虹液体折射与双层微拟态高光 */
.pricing-card.featured {
  background: linear-gradient(145deg, rgba(18, 30, 62, 0.78) 0%, rgba(10, 16, 36, 0.9) 100%);
  border: 2px solid transparent;
  background-image: 
    linear-gradient(#0c152b, #080d1c), 
    linear-gradient(135deg, #00f2fe 0%, #3b82f6 30%, #8b5cf6 70%, #ec4899 100%);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  box-shadow: 
    0 24px 60px -10px rgba(0, 0, 0, 0.7),
    0 0 45px rgba(0, 242, 254, 0.35),
    0 0 65px rgba(139, 92, 246, 0.22),
    inset 0 1px 2px rgba(255, 255, 255, 0.4);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: 
    0 32px 70px -8px rgba(0, 0, 0, 0.75),
    0 0 60px rgba(0, 242, 254, 0.5),
    0 0 85px rgba(139, 92, 246, 0.35);
}

.popular-badge {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00f2fe 0%, #3b82f6 50%, #8b5cf6 100%);
  color: #030712;
  font-size: 0.8rem;
  font-weight: 900;
  padding: 6px 22px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: 
    0 4px 18px rgba(0, 242, 254, 0.55),
    inset 0 1px 1px rgba(255, 255, 255, 0.6);
  white-space: nowrap;
}

.plan-header {
  margin-bottom: 26px;
}

.plan-name {
  font-size: 1.55rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: #ffffff;
  letter-spacing: -0.3px;
}

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

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 18px;
}

.plan-currency {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--primary-cyan);
}

.plan-price {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1;
  color: #ffffff;
  letter-spacing: -1.5px;
}

.plan-unit {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.plan-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 34px;
  flex-grow: 1;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.94rem;
  color: var(--text-secondary);
}

.feature-item svg {
  width: 18px;
  height: 18px;
  fill: var(--accent-emerald);
  flex-shrink: 0;
}

.btn-pricing {
  width: 100%;
}

.pricing-guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-top: 14px;
}

.pricing-guarantee svg {
  width: 14px;
  height: 14px;
  fill: var(--accent-emerald);
}

/* ==========================================================================
   深度特性解析 (Why Us) - 遥测驾驶舱与极客终端
   ========================================================================== */
.why-us-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: stretch;
}

.telemetry-card {
  background: var(--glass-bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 40px 34px;
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  box-shadow: var(--shadow-liquid-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.telemetry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.telemetry-chart {
  background: rgba(4, 8, 20, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4);
}

.telemetry-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.tele-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 14px 10px;
  text-align: center;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.12);
}

.tele-val {
  font-size: 1.25rem;
  font-weight: 800;
  display: block;
}

.tele-lbl {
  font-size: 0.76rem;
  color: var(--text-muted);
}

/* 极客终端 (Terminal Window) */
.terminal-window {
  background: rgba(6, 10, 24, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-liquid-lg);
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.terminal-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}

.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.4);
}

.dot-red { background-color: #ef4444; }
.dot-yellow { background-color: #f59e0b; }
.dot-green { background-color: #10b981; }

.terminal-title {
  font-size: 0.84rem;
  color: var(--text-muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.terminal-body {
  padding: 28px 24px;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.8;
  color: #cbd5e1;
  flex-grow: 1;
}

.code-comment {
  color: #64748b;
}

.code-cmd {
  color: var(--primary-cyan);
  font-weight: 700;
}

.code-output {
  color: var(--accent-emerald);
}

/* ==========================================================================
   客户口碑跑马灯 (Testimonials Marquee)
   ========================================================================== */
.marquee-section {
  padding: 85px 0;
  overflow: hidden;
  position: relative;
}

.marquee-container {
  width: 100%;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 15%, #000 85%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 15%, #000 85%, transparent);
}

.marquee-track {
  display: flex;
  gap: 28px;
  width: max-content;
  animation: marquee-scroll 45s linear infinite;
}

.marquee-track:hover {
  animation-play-state: paused;
}

@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.marquee-content {
  display: flex;
  gap: 28px;
}

.testimonial-card {
  width: 360px;
  background: var(--glass-bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  backdrop-filter: blur(24px) saturate(190%);
  -webkit-backdrop-filter: blur(24px) saturate(190%);
  box-shadow: var(--shadow-liquid-sm);
  transition: var(--transition-normal);
  flex-shrink: 0;
}

.testimonial-card:hover {
  transform: translateY(-6px);
  background: var(--glass-bg-hover);
  border-color: rgba(0, 242, 254, 0.4);
  box-shadow: var(--shadow-liquid-md);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.25) 0%, rgba(139, 92, 246, 0.25) 100%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--primary-cyan);
}

.user-name {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
}

.user-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.stars {
  color: #fbbf24;
  margin-bottom: 12px;
  font-size: 0.92rem;
  letter-spacing: 2px;
}

.user-quote {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   常见问题解答 (FAQ Accordion) - 磨砂液态折叠板
   ========================================================================== */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--glass-bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  overflow: hidden;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-liquid-sm);
}

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.25);
  background: var(--glass-bg-hover);
  box-shadow: var(--shadow-liquid-md);
}

.faq-input {
  display: none;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 28px;
  cursor: pointer;
  font-size: 1.08rem;
  font-weight: 700;
  color: #fff;
  user-select: none;
  transition: var(--transition-fast);
}

.faq-arrow {
  width: 20px;
  height: 20px;
  fill: var(--primary-cyan);
  transition: transform 0.3s var(--ease-spring);
  flex-shrink: 0;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 28px;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.75;
  transition: max-height 0.4s var(--ease-spring), padding 0.3s ease;
}

.faq-input:checked ~ .faq-question .faq-arrow {
  transform: rotate(180deg);
}

.faq-input:checked ~ .faq-answer {
  max-height: 400px;
  padding-bottom: 26px;
}

/* ==========================================================================
   行动呼吁横幅 (CTA Banner)
   ========================================================================== */
.cta-banner {
  margin: 60px auto 90px auto;
  max-width: 1100px;
  background: linear-gradient(135deg, rgba(16, 28, 62, 0.8) 0%, rgba(10, 16, 36, 0.9) 100%);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-xl);
  padding: 65px 45px;
  text-align: center;
  backdrop-filter: blur(32px) saturate(210%);
  -webkit-backdrop-filter: blur(32px) saturate(210%);
  box-shadow: 
    0 24px 60px -10px rgba(0, 0, 0, 0.65),
    0 0 50px rgba(0, 242, 254, 0.2),
    inset 0 1px 2px rgba(255, 255, 255, 0.4);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 30%;
  width: 40%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.cta-title {
  font-size: clamp(2rem, 3.5vw, 2.6rem);
  font-weight: 900;
  margin-bottom: 18px;
  letter-spacing: -0.8px;
}

.cta-desc {
  font-size: 1.12rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 38px auto;
  line-height: 1.7;
}

/* ==========================================================================
   页脚规范 (Footer)
   ========================================================================== */
.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(4, 7, 16, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 48px 0;
  text-align: center;
  position: relative;
  z-index: 10;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.footer-link {
  font-size: 0.92rem;
  color: var(--text-secondary);
  font-weight: 500;
}

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

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* ==========================================================================
   独立子页面样式 (Subpages: About, Terms, Privacy, Sitemap, News)
   ========================================================================== */
.subpage-hero {
  padding-top: 160px;
  padding-bottom: 60px;
  text-align: center;
  position: relative;
}

.subpage-container {
  max-width: 880px;
  margin: 0 auto 100px auto;
  background: var(--glass-bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 55px 48px;
  backdrop-filter: blur(30px) saturate(200%);
  -webkit-backdrop-filter: blur(30px) saturate(200%);
  box-shadow: var(--shadow-liquid-lg);
}

.subpage-content h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: #fff;
  margin-top: 36px;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.subpage-content h2:first-of-type {
  margin-top: 0;
}

.subpage-content p {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.subpage-content ul {
  margin-bottom: 24px;
  padding-left: 20px;
  list-style: disc;
}

.subpage-content li {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 10px;
}

/* 资讯专栏布局 (Articles & Guides Layout) */
.articles-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 36px;
  margin-bottom: 90px;
  align-items: flex-start;
}

.article-sidebar {
  position: sticky;
  top: 100px;
  background: var(--glass-bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: var(--shadow-liquid-sm);
}

.sidebar-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-link {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.5;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.toc-link:hover {
  color: var(--primary-cyan);
  background: rgba(255, 255, 255, 0.05);
}

.articles-content {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.article-item {
  background: var(--glass-bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 44px 38px;
  backdrop-filter: blur(28px) saturate(190%);
  -webkit-backdrop-filter: blur(28px) saturate(190%);
  box-shadow: var(--shadow-liquid-md);
  transition: var(--transition-normal);
}

.article-item:hover {
  border-color: rgba(0, 242, 254, 0.35);
  box-shadow: var(--shadow-liquid-lg);
}

.article-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary-cyan);
  background: rgba(0, 242, 254, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}

.article-title {
  font-size: 1.55rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 14px;
  letter-spacing: -0.4px;
}

.article-meta {
  font-size: 0.84rem;
  color: var(--text-dim);
  margin-bottom: 22px;
}

.article-item p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.78;
  margin-bottom: 18px;
}

.article-item h3 {
  font-size: 1.28rem;
  font-weight: 700;
  color: #fff;
  margin-top: 26px;
  margin-bottom: 14px;
}

/* 表格拟物化卡片 */
.article-comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 24px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(8, 14, 30, 0.6);
}

.article-comparison-table th,
.article-comparison-table td {
  padding: 14px 16px;
  text-align: left;
  font-size: 0.92rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.article-comparison-table th {
  background: rgba(255, 255, 255, 0.05);
  font-weight: 700;
  color: #fff;
}

.article-comparison-table tr:last-child td {
  border-bottom: none;
}

/* ==========================================================================
   响应式媒体查询 (Responsive Breakpoints)
   ========================================================================== */
@media (max-width: 1024px) {
  .cards-grid-3,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }

  .why-us-grid,
  .media-ai-body {
    grid-template-columns: 1fr;
  }
  
  .articles-layout {
    grid-template-columns: 1fr;
  }
  
  .article-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .navbar {
    top: 10px;
    width: calc(100% - 20px);
    border-radius: var(--radius-xl);
    padding: 12px 18px;
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    background: rgba(10, 16, 36, 0.96);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
    padding: 24px;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    display: none;
  }

  #nav-toggle:checked ~ .nav-links {
    display: flex;
  }

  .nav-toggle-label {
    display: flex;
  }

  .nav-actions {
    display: none;
  }

  .cards-grid-3,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .hero-section {
    padding-top: 130px;
    padding-bottom: 60px;
  }

  .hero-stats {
    gap: 24px;
    padding: 24px 18px;
  }

  .cloud-node-dock {
    border-radius: var(--radius-lg);
    gap: 8px;
  }

  .media-ai-card,
  .subpage-container,
  .article-item {
    padding: 32px 20px;
  }

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