/* ==========================================================================
   ikuku云 (ikukuyun.top) - 赛博朋克 · 霓虹都市 · 未来反乌托邦 样式规范
   配色: 主背景 #0F0524 | 主色 #FF006E | 次色 #00F5FF | 文字 #FFFFFF / rgba(255,255,255,0.6)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@700;800;900&display=swap');

:root {
  --bg-main: #0F0524;
  --bg-card: rgba(22, 11, 48, 0.82);
  --bg-card-hover: rgba(35, 18, 74, 0.92);
  
  --primary: #FF006E;       /* 霓虹粉 */
  --secondary: #00F5FF;     /* 电光青 */
  --text-main: #FFFFFF;     /* 高亮文字 */
  --text-muted: rgba(255, 255, 255, 0.65); /* 辅助文字 */
  
  --border-neon-pink: rgba(255, 0, 110, 0.35);
  --border-neon-cyan: rgba(0, 245, 255, 0.35);
  --border-card: rgba(255, 255, 255, 0.08);

  --font-heading: 'Orbitron', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Inter", "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", sans-serif;

  --container-max: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  --transition: all 0.22s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

html {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-main);
  scroll-behavior: smooth;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* 锚点防固定导航栏遮挡偏移 */
[id] {
  scroll-margin-top: 85px;
}

/* 键盘可访问性焦点轮廓 */
:focus-visible {
  outline: 2px solid var(--secondary);
  outline-offset: 3px;
  box-shadow: 0 0 10px rgba(0, 245, 255, 0.6);
}

/* 跳过导航进入主内容区 */
.skip-link {
  position: absolute;
  top: -999px;
  left: 16px;
  background: var(--bg-main);
  color: var(--secondary);
  border: 2px solid var(--primary);
  box-shadow: 0 0 15px rgba(255, 0, 110, 0.6), 4px 4px 0 var(--secondary);
  padding: 10px 18px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  z-index: 10000;
  transition: top 0.2s ease;
  text-decoration: none;
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 16px;
}

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background-color: var(--bg-main);
}

a {
  color: inherit;
  text-decoration: none;
}

/* 扫描线纹理叠加 */
.scanlines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 999;
  background: linear-gradient(rgba(15, 5, 36, 0) 50%, rgba(0, 0, 0, 0.25) 50%),
              linear-gradient(90deg, rgba(255, 0, 110, 0.02), rgba(0, 245, 255, 0.01), rgba(255, 0, 110, 0.02));
  background-size: 100% 4px, 6px 100%;
  opacity: 0.65;
}

/* 2个大型模糊光晕 (粉/青 缓慢呼吸缩放 0.4 透明度) */
.cyber-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  opacity: 0.4;
  z-index: 0;
}

.cyber-glow-pink {
  width: 520px;
  height: 520px;
  background: var(--primary);
  top: -80px;
  left: -80px;
  animation: glowBreathPink 9s ease-in-out infinite alternate;
}

.cyber-glow-cyan {
  width: 560px;
  height: 560px;
  background: var(--secondary);
  top: 35%;
  right: -120px;
  animation: glowBreathCyan 11s ease-in-out infinite alternate;
}

@keyframes glowBreathPink {
  0% { transform: scale(1) translate(0, 0); opacity: 0.32; }
  100% { transform: scale(1.22) translate(50px, 40px); opacity: 0.44; }
}

@keyframes glowBreathCyan {
  0% { transform: scale(1) translate(0, 0); opacity: 0.3; }
  100% { transform: scale(1.26) translate(-40px, 50px); opacity: 0.45; }
}

/* 底部 50% 区域透视网格 (粉/青混合，快速向观察者方向流动 4秒一周期) */
.perspective-grid-container {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 50vh;
  overflow: hidden;
  perspective: 320px;
  pointer-events: none;
  z-index: 1;
}

.perspective-grid {
  position: absolute;
  width: 250%;
  height: 250%;
  left: -75%;
  top: 0;
  transform-origin: 50% 0%;
  transform: rotateX(75deg);
  background-image: 
    linear-gradient(to right, rgba(0, 245, 255, 0.4) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 0, 110, 0.4) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: gridFlowForward 4s linear infinite;
}

@keyframes gridFlowForward {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 0 50px;
  }
}

.perspective-grid-container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, var(--bg-main) 0%, rgba(15, 5, 36, 0.4) 40%, transparent 100%);
  z-index: 2;
}

/* 40条粉色霓虹雨滴下落 (0.6 - 1.4秒一周期) */
.cyber-rain-box {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
  z-index: 2;
}

.rain-drop {
  position: absolute;
  top: -80px;
  width: 1.5px;
  background: linear-gradient(to bottom, transparent, var(--primary));
  opacity: 0;
  animation: rainDropFall linear infinite;
}

@keyframes rainDropFall {
  0% {
    transform: translateY(-40px);
    opacity: 0;
  }
  15% {
    opacity: 0.85;
  }
  90% {
    opacity: 0.6;
  }
  100% {
    transform: translateY(115vh);
    opacity: 0;
  }
}

/* 页面内容层级 */
.main-wrapper {
  position: relative;
  z-index: 10;
}

/* 容器规范 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* 页眉与导航 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 5, 36, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-neon-cyan);
  box-shadow: 0 2px 20px rgba(0, 245, 255, 0.15);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #ffffff;
  text-shadow: 0 0 10px var(--primary);
}

.brand-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 14px var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--secondary);
  text-shadow: 0 0 8px var(--secondary);
}

.nav-badge-new {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.65rem;
  font-weight: 800;
  background: var(--primary);
  color: #FFFFFF;
  padding: 1px 6px;
  border-radius: 2px;
  margin-left: 4px;
  box-shadow: 0 0 8px var(--primary);
}

/* 移动端横向导航条 */
.mobile-nav-bar {
  display: none;
  background: rgba(18, 7, 44, 0.96);
  border-bottom: 1px solid var(--border-neon-pink);
  padding: 8px 16px;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
}

.mobile-nav-bar::-webkit-scrollbar {
  display: none;
}

.mobile-nav-list {
  display: inline-flex;
  gap: 12px;
  list-style: none;
}

.mobile-nav-list a {
  font-size: 0.85rem;
  color: #cbd5e1;
  font-weight: 600;
  padding: 6px 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
}

.mobile-nav-list a:hover {
  border-color: var(--secondary);
  color: var(--secondary);
  box-shadow: 0 0 8px var(--secondary);
}

/* ==========================================================================
   【CTA 按钮规范】
   粉色描边按钮（无填充）+ 4px 青色硬阴影
   hover 时填充粉色 + 文字变暗紫 + 阴影变 2px，模拟按下
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease-in-out;
  text-align: center;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn-primary {
  background: transparent;
  color: #FFFFFF;
  border: 2px solid var(--primary);
  box-shadow: 4px 4px 0px var(--secondary);
}

.btn-primary:hover {
  background: var(--primary);
  color: var(--bg-main);
  box-shadow: 2px 2px 0px var(--secondary);
  transform: translate(2px, 2px);
}

.btn-secondary {
  background: transparent;
  color: #FFFFFF;
  border: 2px solid var(--secondary);
  box-shadow: 4px 4px 0px var(--primary);
}

.btn-secondary:hover {
  background: var(--secondary);
  color: var(--bg-main);
  box-shadow: 2px 2px 0px var(--primary);
  transform: translate(2px, 2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
  font-weight: 800;
}

/* ==========================================================================
   【主视觉区 (Hero)】
   大标题布局：左侧 H1「ikuku云」+ 右侧 300x300px 赛博网格底盘全息动画
   ========================================================================== */
.hero {
  padding: 80px 0 60px;
  position: relative;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  align-items: center;
  margin-bottom: 40px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(255, 0, 110, 0.12);
  border: 1px solid var(--primary);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 20px;
  box-shadow: 0 0 10px rgba(255, 0, 110, 0.3);
}

.hero-pill .pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--secondary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--secondary);
}

/* H1「ikuku云」: Orbitron 800 字重，粉到青渐变 + 三层文字阴影 (粉30px + 青60px + 4px粉色硬阴影) */
.hero-title {
  font-family: var(--font-heading);
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-title .brand-highlight {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 
    0 0 30px var(--primary),
    0 0 60px var(--secondary),
    4px 4px 0px var(--primary);
}

.hero-subtitle-text {
  display: block;
  font-size: 1.9rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-top: 8px;
  text-shadow: 0 0 15px rgba(0, 245, 255, 0.4);
}

/* 主视觉简介卡片 */
.hero-intro-card {
  background: var(--bg-card);
  border: 1px solid var(--border-neon-cyan);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  text-align: left;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.98rem;
  box-shadow: 0 0 25px rgba(0, 245, 255, 0.08);
  margin-bottom: 28px;
}

.hero-intro-card strong {
  color: var(--secondary);
}

.hero-intro-card p {
  margin-bottom: 12px;
}

.hero-intro-card p:last-child {
  margin-bottom: 0;
}

.hero-intro-tags {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.hero-intro-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  background: rgba(255, 0, 110, 0.1);
  border: 1px solid var(--border-neon-pink);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

/* ==========================================================================
   【右侧全息底座动画 (300x300px)】
   透视 60°，30px 网格，360° 旋转 8s 一周期
   2层圆环反向旋转，中心闪电 SVG (粉到青渐变 + 白色描边 + 双层 drop-shadow)
   每 1.5s 触发放电动画，同步出现青色 glitch 影子
   ========================================================================== */
.cyber-stage-wrapper {
  width: 300px;
  height: 300px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}

/* 300x300px 赛博网格底盘 */
.cyber-pedestal-grid {
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  transform: perspective(600px) rotateX(60deg);
  background-image: 
    linear-gradient(to right, rgba(0, 245, 255, 0.45) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 0, 110, 0.45) 1px, transparent 1px);
  background-size: 30px 30px;
  box-shadow: 0 0 35px rgba(0, 245, 255, 0.3), inset 0 0 25px rgba(255, 0, 110, 0.3);
  animation: pedestalRotate 8s linear infinite;
  z-index: 1;
}

@keyframes pedestalRotate {
  0% { transform: perspective(600px) rotateX(60deg) rotateZ(0deg); }
  100% { transform: perspective(600px) rotateX(60deg) rotateZ(360deg); }
}

/* 圆环 1: 粉色实线，顺时针旋转 */
.cyber-ring-outer {
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  box-shadow: 0 0 15px var(--primary);
  transform: perspective(600px) rotateX(60deg);
  animation: ringRotateClockwise 6s linear infinite;
  z-index: 2;
}

@keyframes ringRotateClockwise {
  0% { transform: perspective(600px) rotateX(60deg) rotateZ(0deg); }
  100% { transform: perspective(600px) rotateX(60deg) rotateZ(360deg); }
}

/* 圆环 2: 青色虚线，反向 (逆时针) 旋转 */
.cyber-ring-inner {
  position: absolute;
  width: 210px;
  height: 210px;
  border-radius: 50%;
  border: 2px dashed var(--secondary);
  box-shadow: 0 0 15px var(--secondary);
  transform: perspective(600px) rotateX(60deg);
  animation: ringRotateCounter 7s linear infinite;
  z-index: 3;
}

@keyframes ringRotateCounter {
  0% { transform: perspective(600px) rotateX(60deg) rotateZ(360deg); }
  100% { transform: perspective(600px) rotateX(60deg) rotateZ(0deg); }
}

/* 中心闪电容器 */
.lightning-container {
  position: absolute;
  width: 80px;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

/* 主闪电 SVG: 粉到青渐变填充 + 白色描边 + 双层 drop-shadow 辉光 + 1.5s 放电动画 */
.lightning-svg {
  width: 80px;
  height: 140px;
  filter: drop-shadow(0 0 10px var(--primary)) drop-shadow(0 0 25px var(--secondary));
  animation: lightningDischarge 1.5s ease-in-out infinite;
}

@keyframes lightningDischarge {
  0%, 100% {
    transform: scale(1);
    filter: drop-shadow(0 0 8px var(--primary)) drop-shadow(0 0 20px var(--secondary));
  }
  30% {
    transform: scale(1.16) translate(-1px, -2px);
    filter: drop-shadow(0 0 22px var(--primary)) drop-shadow(0 0 45px #FFFFFF) drop-shadow(0 0 35px var(--secondary));
  }
  35% {
    transform: scale(1.08) translate(1px, 2px);
  }
  40% {
    transform: scale(1.14);
  }
}

/* 青色 glitch 影子: 4s 一周期，透明度 0 -> 0.6 -> 0，横向位移 + skewX 形变 */
.lightning-glitch-shadow {
  position: absolute;
  top: 0;
  left: 0;
  width: 80px;
  height: 140px;
  pointer-events: none;
  animation: glitchShadowPulse 4s ease-in-out infinite;
}

@keyframes glitchShadowPulse {
  0%, 85%, 100% {
    opacity: 0;
    transform: translate(0, 0) skewX(0deg);
  }
  88% {
    opacity: 0.6;
    transform: translate(-10px, 2px) skewX(-14deg);
    filter: drop-shadow(0 0 12px var(--secondary));
  }
  92% {
    opacity: 0.4;
    transform: translate(12px, -3px) skewX(12deg);
  }
  96% {
    opacity: 0.6;
    transform: translate(-6px, 1px) skewX(-8deg);
  }
}

/* 信任背书横幅 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: var(--container-max);
  margin: 30px auto 0;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-neon-cyan);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 30px rgba(0, 245, 255, 0.08);
}

.stat-item h3 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--secondary);
  text-shadow: 0 0 10px var(--secondary);
  margin-bottom: 4px;
}

.stat-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* 通用区块排版 */
.section {
  padding: 85px 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
  text-shadow: 0 0 8px var(--primary);
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: #FFFFFF;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
}

/* 核心优势 (3个卡片) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 34px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

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

.feature-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--border-neon-cyan);
  box-shadow: 0 10px 30px rgba(0, 245, 255, 0.15);
}

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

.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: rgba(255, 0, 110, 0.12);
  border: 1px solid var(--border-neon-pink);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--primary);
  box-shadow: 0 0 12px rgba(255, 0, 110, 0.2);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #FFFFFF;
}

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

/* 流媒体与 AI 支持卡片区 */
.media-ai-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.media-ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-neon-cyan);
  border-radius: var(--radius-md);
  padding: 34px;
  position: relative;
  box-shadow: 0 4px 25px rgba(0, 245, 255, 0.05);
}

.media-ai-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #FFFFFF;
}

.media-ai-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.service-badge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px;
}

.service-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  transition: var(--transition);
}

.service-badge:hover {
  background: rgba(0, 245, 255, 0.1);
  border-color: var(--secondary);
  color: var(--secondary);
  transform: translateY(-2px);
}

.badge-status {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--secondary);
  box-shadow: 0 0 6px var(--secondary);
}

/* ==========================================================================
   【套餐价格对比表】
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-neon-cyan);
  box-shadow: 0 10px 30px rgba(0, 245, 255, 0.15);
}

.pricing-card.featured {
  background: rgba(30, 15, 65, 0.95);
  border: 2px solid var(--primary);
  box-shadow: 0 0 35px rgba(255, 0, 110, 0.25);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.04) translateY(-4px);
}

.pricing-tag {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #FFFFFF;
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 14px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 0 12px var(--primary);
}

.pricing-header {
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 20px;
  margin-bottom: 20px;
}

.plan-name {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #FFFFFF;
}

.plan-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.plan-currency {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--secondary);
}

.plan-amount {
  font-family: var(--font-heading);
  font-size: 2.3rem;
  font-weight: 900;
  line-height: 1;
  color: #FFFFFF;
}

.plan-period {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.plan-subtext {
  font-size: 0.78rem;
  color: var(--secondary);
  margin-top: 6px;
}

.plan-features {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.plan-features li strong {
  color: #FFFFFF;
}

.plan-features li svg {
  flex-shrink: 0;
  color: var(--secondary);
}

.pricing-card .btn {
  width: 100%;
}

/* 用户评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-card p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.review-stars {
  color: var(--primary);
  text-shadow: 0 0 8px var(--primary);
  margin-bottom: 12px;
  display: flex;
  gap: 3px;
}

.reviewer-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(255, 0, 110, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  color: var(--primary);
  border: 1px solid var(--border-neon-pink);
}

.reviewer-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
}

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

/* 常见问题 (FAQ 6个) */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-item[open] {
  border-color: var(--border-neon-cyan);
  background: var(--bg-card-hover);
  box-shadow: 0 0 20px rgba(0, 245, 255, 0.1);
}

.faq-summary {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
  color: #FFFFFF;
}

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

.faq-summary .faq-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.25s ease;
  color: var(--secondary);
  flex-shrink: 0;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-content {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 14px;
}

/* 底部转化横幅 */
.bottom-cta-banner {
  background: linear-gradient(135deg, rgba(255, 0, 110, 0.15) 0%, rgba(0, 245, 255, 0.15) 100%);
  border: 1px solid var(--border-neon-cyan);
  border-radius: var(--radius-md);
  padding: 50px 30px;
  text-align: center;
  margin-top: 40px;
  box-shadow: 0 0 35px rgba(0, 245, 255, 0.12);
}

.bottom-cta-banner h2 {
  font-family: var(--font-heading);
  font-size: 2.1rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #FFFFFF;
}

.bottom-cta-banner p {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 28px;
}

/* 页脚 (只保留 4 个标题，在新页面打开) */
.footer {
  border-top: 1px solid var(--border-neon-cyan);
  background: #090216;
  padding: 48px 0 36px;
  margin-top: 60px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  list-style: none;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition);
  position: relative;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.footer-nav a:hover {
  color: var(--secondary);
  text-shadow: 0 0 10px var(--secondary);
}

.footer-copy {
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
}

/* 专门针对独立内容页（知识科普、关于我们等）的样式 */
.doc-hero {
  padding: 60px 0 30px;
  border-bottom: 1px solid var(--border-neon-cyan);
  margin-bottom: 40px;
}

.doc-hero h1 {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #FFFFFF;
  text-shadow: 0 0 15px var(--primary);
}

.doc-hero p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.doc-body {
  max-width: 860px;
  margin: 0 auto 60px;
  background: var(--bg-card);
  border: 1px solid var(--border-neon-pink);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: 0 0 35px rgba(255, 0, 110, 0.1);
}

.doc-section {
  margin-bottom: 36px;
}

.doc-section:last-child {
  margin-bottom: 0;
}

.doc-section h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  gap: 8px;
}

.doc-section p, .doc-section ul {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
  font-size: 0.98rem;
  margin-bottom: 12px;
}

.doc-section ul {
  padding-left: 20px;
}

.doc-section li {
  margin-bottom: 8px;
}

/* 面包屑导航 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

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

.breadcrumb-separator {
  color: rgba(255, 255, 255, 0.35);
}

.breadcrumb-current {
  color: var(--secondary);
  font-weight: 600;
}

/* 独立文章翻页导航与返回中心 */
.article-pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border-card);
  flex-wrap: wrap;
}

.pagination-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: rgba(22, 11, 48, 0.9);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.pagination-link:hover {
  border-color: var(--secondary);
  color: var(--secondary);
  box-shadow: 0 0 15px rgba(0, 245, 255, 0.25);
}

.pagination-link.center-hub {
  border-color: var(--border-neon-pink);
  color: var(--primary);
}

.pagination-link.center-hub:hover {
  box-shadow: 0 0 15px rgba(255, 0, 110, 0.25);
}

.highlight-box {
  background: rgba(0, 245, 255, 0.08);
  border-left: 4px solid var(--secondary);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 18px 0;
  color: #e2e8f0;
}

.alert-box {
  background: rgba(255, 0, 110, 0.1);
  border-left: 4px solid var(--primary);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 18px 0;
  color: #fca5a5;
}

/* 网站地图网格 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.sitemap-group {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 20px;
}

.sitemap-group h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin-bottom: 14px;
  color: var(--secondary);
}

.sitemap-group ul {
  list-style: none;
  padding: 0;
}

.sitemap-group li {
  margin-bottom: 10px;
}

.sitemap-group a {
  color: var(--text-muted);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.sitemap-group a:hover {
  color: var(--secondary);
  padding-left: 4px;
}

/* 响应式媒体查询 (移动端适配) */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-intro-card {
    text-align: left;
  }
  
  .hero-cta-group {
    justify-content: center;
  }
  
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .mobile-nav-bar {
    display: block;
  }
  
  .hero {
    padding: 50px 0 36px;
  }
  
  .hero-title {
    font-size: 2.3rem;
  }
  
  .hero-subtitle-text {
    font-size: 1.4rem;
  }
  
  .hero-intro-card {
    padding: 18px 16px;
    font-size: 0.92rem;
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 18px;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .media-ai-container {
    grid-template-columns: 1fr;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }
  
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }
  
  .btn {
    min-height: 48px;
    width: 100%;
  }
  
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-cta-group .btn {
    width: 100%;
  }
  
  .doc-body {
    padding: 24px 18px;
  }

  [id] {
    scroll-margin-top: 120px;
  }
}

/* 尊重用户系统减少动画设置 (Prefers-Reduced-Motion) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .grid-flow-plane,
  .cyber-glow-pink,
  .cyber-glow-cyan,
  .holo-pedestal,
  .holo-ring-inner,
  .holo-ring-outer,
  .lightning-core,
  .glitch-shadow,
  .neon-drop {
    animation: none !important;
  }
}