/* ==========================================================================
   锦云 JinYun - 量子立方 + 锦鲤跃云 + 赛博科技 核心样式表
   配色体系：
   - 主背景：#0A0E27 深蓝黑
   - 主色：#8B5CF6 量子紫
   - 次色：#06B6D4 数据青
   - 文字：#FFFFFF / rgba(255,255,255,0.6)
   ========================================================================== */

:root {
  --bg-primary: #0A0E27;
  --bg-secondary: #0f153a;
  --bg-card: rgba(15, 21, 58, 0.65);
  --bg-card-hover: rgba(23, 32, 88, 0.85);
  --border-color: rgba(139, 92, 246, 0.18);
  --border-accent: rgba(6, 182, 212, 0.45);
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.6);
  --text-muted: rgba(255, 255, 255, 0.4);
  --accent-purple: #8B5CF6;
  --accent-cyan: #06B6D4;
  --accent-orange: #F97316;
  --gradient-brand: linear-gradient(135deg, #8B5CF6 0%, #06B6D4 100%);
  --radius-sm: 8px;
  --radius-btn: 12px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --shadow-purple-glow: 0 0 30px rgba(139, 92, 246, 0.5);
  --shadow-cyan-glow: 0 0 30px rgba(6, 182, 212, 0.7);
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
  word-break: break-word;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--bg-primary);
  position: relative;
}

/* 锚点防遮挡 */
[id], section[id], article[id] {
  scroll-margin-top: 85px;
}

/* 键盘焦点指示器 */
:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.6);
}

/* 无障碍跳转到主要内容入口 */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--gradient-brand);
  color: #FFFFFF;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  z-index: 99999;
  transition: top 0.25s ease;
  box-shadow: 0 0 25px rgba(6, 182, 212, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.skip-link:focus {
  top: 15px;
  outline: 2px solid #FFFFFF;
}

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

img, svg {
  display: block;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* ==================== 背景赛博动效层 ==================== */
.cyber-bg-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

/* 细网格线背景 + 径向遮罩渐隐 */
.cyber-grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(139, 92, 246, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6, 182, 212, 0.08) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at 50% 35%, rgba(0, 0, 0, 1) 35%, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 35%, rgba(0, 0, 0, 1) 35%, transparent 80%);
}

/* 2 个大型紫/青 blur 光晕缓慢呼吸缩放 */
.glow-halo {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.45;
  animation: haloBreathe 12s ease-in-out infinite alternate;
}

.halo-purple {
  width: 650px;
  height: 650px;
  background: #8B5CF6;
  top: -150px;
  left: 10%;
  animation-duration: 14s;
}

.halo-cyan {
  width: 600px;
  height: 600px;
  background: #06B6D4;
  top: 250px;
  right: 5%;
  animation-duration: 11s;
  animation-delay: -5s;
}

@keyframes haloBreathe {
  0% {
    transform: scale(0.85) translate(0, 0);
    opacity: 0.35;
  }
  50% {
    transform: scale(1.15) translate(25px, -20px);
    opacity: 0.55;
  }
  100% {
    transform: scale(0.9) translate(-20px, 30px);
    opacity: 0.4;
  }
}

/* 25 条垂直数据流光下落 (紫/青交替，3-7s周期，速度各异) */
.stream-light {
  position: absolute;
  top: -150px;
  width: 1.5px;
  height: 120px;
  opacity: 0.7;
  border-radius: 9999px;
  animation: streamFall linear infinite;
}

.stream-light.purple {
  background: linear-gradient(to bottom, transparent, #8B5CF6, transparent);
  box-shadow: 0 0 10px #8B5CF6;
}

.stream-light.cyan {
  background: linear-gradient(to bottom, transparent, #06B6D4, transparent);
  box-shadow: 0 0 10px #06B6D4;
}

@keyframes streamFall {
  0% {
    transform: translateY(0);
    opacity: 0;
  }
  15% {
    opacity: 0.85;
  }
  85% {
    opacity: 0.85;
  }
  100% {
    transform: translateY(115vh);
    opacity: 0;
  }
}

/* 8 个六边形 SVG 散布在背景中，按节奏脉冲发光 */
.hex-svg {
  position: absolute;
  animation: hexPulse 6s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes hexPulse {
  0% {
    transform: scale(0.9) rotate(0deg);
    opacity: 0.15;
    filter: drop-shadow(0 0 4px rgba(139, 92, 246, 0.2));
  }
  50% {
    transform: scale(1.12) rotate(15deg);
    opacity: 0.45;
    filter: drop-shadow(0 0 16px rgba(6, 182, 212, 0.6));
  }
  100% {
    transform: scale(0.95) rotate(-10deg);
    opacity: 0.2;
    filter: drop-shadow(0 0 8px rgba(139, 92, 246, 0.3));
  }
}

/* ==================== 顶部导航栏 ==================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(10, 14, 39, 0.85);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.45rem;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-brand);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
}

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

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--accent-cyan);
  text-shadow: 0 0 10px rgba(6, 182, 212, 0.6);
}

/* ==================== CTA 按钮规范 ==================== */
/* 紫到青的渐变按钮，圆角 12px，带 30px 紫色辉光，hover 时辉光变青 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: var(--transition);
  cursor: pointer;
  text-align: center;
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #FFFFFF;
  padding: 14px 30px;
  font-size: 1rem;
  box-shadow: var(--shadow-purple-glow);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-cyan-glow);
  filter: brightness(1.08);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.875rem;
  border-radius: 10px;
}

.btn-outline {
  background: rgba(15, 21, 58, 0.6);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 14px 28px;
  border-radius: var(--radius-btn);
}

.btn-outline:hover {
  background: rgba(139, 92, 246, 0.15);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.35);
}

.btn-block {
  width: 100%;
}

/* ==================== 醒目主视觉区 (Hero Layout) ==================== */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
}

.hero-two-col {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  align-items: center;
  gap: 40px;
  margin-bottom: 56px;
}

.hero-left {
  text-align: left;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.35);
  border-radius: var(--radius-full);
  color: var(--accent-cyan);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 24px;
}

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

/* H1「锦云」使用 Space Grotesk，700 字重，带紫到青渐变 + 双层文字阴影 */
.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.title-gradient-glow {
  background: linear-gradient(135deg, #8B5CF6 0%, #06B6D4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 20px rgba(139, 92, 246, 0.55)) drop-shadow(0 0 45px rgba(6, 182, 212, 0.45));
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}

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

/* ==================== 右侧动画：量子立方 + 锦鲤跃云 ==================== */
.hero-right-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  min-height: 380px;
}

.quantum-scene {
  position: relative;
  width: 320px;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1100px;
}

/* 外层 2 个虚线圆轨道 (紫/青) 反向旋转，发光节点沿轨道运行 */
.orbit-track {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.orbit-purple {
  width: 290px;
  height: 290px;
  border: 1.5px dashed rgba(139, 92, 246, 0.45);
  animation: orbitRotate 14s linear infinite;
}

.orbit-cyan {
  width: 350px;
  height: 350px;
  border: 1.5px dashed rgba(6, 182, 212, 0.45);
  animation: orbitRotateRev 18s linear infinite;
}

@keyframes orbitRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes orbitRotateRev {
  0% { transform: rotate(360deg); }
  100% { transform: rotate(0deg); }
}

.orbit-node {
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.node-purple {
  background: #8B5CF6;
  box-shadow: 0 0 15px #8B5CF6, 0 0 25px #8B5CF6;
}

.node-cyan {
  background: #06B6D4;
  box-shadow: 0 0 15px #06B6D4, 0 0 25px #06B6D4;
}

/* 200×200px CSS 3D 立方体 (Y+X 轴同时 360° 旋转，18秒周期) */
.cube-3d-wrap {
  width: 200px;
  height: 200px;
  position: relative;
  transform-style: preserve-3d;
  animation: cubeSpin 18s linear infinite;
}

@keyframes cubeSpin {
  0% {
    transform: rotateX(0deg) rotateY(0deg);
  }
  100% {
    transform: rotateX(360deg) rotateY(360deg);
  }
}

/* 6 个半透明玻璃面，紫/青色边框 + backdrop-blur */
.cube-face {
  position: absolute;
  width: 200px;
  height: 200px;
  background: rgba(10, 14, 39, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1.5px solid rgba(139, 92, 246, 0.5);
  box-shadow: inset 0 0 24px rgba(6, 182, 212, 0.2), 0 0 15px rgba(139, 92, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
}

.face-front  { transform: translateZ(100px); border-color: rgba(139, 92, 246, 0.7); }
.face-back   { transform: rotateY(180deg) translateZ(100px); border-color: rgba(6, 182, 212, 0.7); }
.face-right  { transform: rotateY(90deg) translateZ(100px); border-color: rgba(6, 182, 212, 0.6); }
.face-left   { transform: rotateY(-90deg) translateZ(100px); border-color: rgba(139, 92, 246, 0.6); }
.face-top    { transform: rotateX(90deg) translateZ(100px); border-color: rgba(139, 92, 246, 0.7); }
.face-bottom { transform: rotateX(-90deg) translateZ(100px); border-color: rgba(6, 182, 212, 0.7); }

/* 8 个顶点发光小球 (紫/青/橙)，按节奏脉冲 */
.cube-vertex {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  animation: vertexPulse 3s ease-in-out infinite alternate;
}

@keyframes vertexPulse {
  0% { transform: scale(0.8); opacity: 0.7; }
  100% { transform: scale(1.3); opacity: 1; }
}

.v-p1 { transform: translate3d( -5px,  -5px,  100px); background: #8B5CF6; box-shadow: 0 0 12px #8B5CF6; }
.v-p2 { transform: translate3d(195px,  -5px,  100px); background: #06B6D4; box-shadow: 0 0 12px #06B6D4; }
.v-p3 { transform: translate3d(195px, 195px,  100px); background: #F97316; box-shadow: 0 0 12px #F97316; }
.v-p4 { transform: translate3d( -5px, 195px,  100px); background: #8B5CF6; box-shadow: 0 0 12px #8B5CF6; }

.v-p5 { transform: translate3d( -5px,  -5px, -100px); background: #06B6D4; box-shadow: 0 0 12px #06B6D4; }
.v-p6 { transform: translate3d(195px,  -5px, -100px); background: #8B5CF6; box-shadow: 0 0 12px #8B5CF6; }
.v-p7 { transform: translate3d(195px, 195px, -100px); background: #06B6D4; box-shadow: 0 0 12px #06B6D4; }
.v-p8 { transform: translate3d( -5px, 195px, -100px); background: #F97316; box-shadow: 0 0 12px #F97316; }

/* 立方体中心叠加 80×60px 锦鲤 SVG (紫到青渐变填充 + 白色描边 + 眼睛，左右摆动 swim 动画 3s 周期) */
.koi-center-wrap {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 80px;
  height: 60px;
  transform: translate(-50%, -50%);
  z-index: 10;
  pointer-events: none;
}

.koi-svg-element {
  width: 80px;
  height: 60px;
  animation: koiSwim 3s ease-in-out infinite;
  filter: drop-shadow(0 0 15px rgba(6, 182, 212, 0.7));
}

@keyframes koiSwim {
  0% {
    transform: rotate(-8deg) translateY(0) scale(1);
  }
  50% {
    transform: rotate(8deg) translateY(-8px) scale(1.04);
  }
  100% {
    transform: rotate(-8deg) translateY(0) scale(1);
  }
}

/* ==================== 信任数据卡片 ==================== */
.trust-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 30px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

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

.stat-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: #FFFFFF;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ==================== 章节通用样式 ==================== */
.section {
  padding: 85px 0;
  position: relative;
  z-index: 2;
}

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

.section-tag {
  color: var(--accent-cyan);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 8px;
  text-shadow: 0 0 10px rgba(6, 182, 212, 0.4);
}

.section-title {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-size: 2.35rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: #FFFFFF;
}

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

/* ==================== 3个核心优势卡片 ==================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-accent);
  box-shadow: 0 10px 30px rgba(6, 182, 212, 0.25);
  background: var(--bg-card-hover);
}

.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(139, 92, 246, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 22px;
  border: 1px solid rgba(139, 92, 246, 0.3);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.2);
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #FFFFFF;
}

.feature-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ==================== 流媒体与 AI 支持图卡 ==================== */
.support-section {
  background: rgba(15, 21, 58, 0.4);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.support-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  position: relative;
  backdrop-filter: blur(10px);
}

.support-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.badge-streaming {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-ai {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.35);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.2);
}

.support-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.support-desc {
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 0.95rem;
}

.app-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.app-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: #e2e8f0;
  transition: var(--transition);
}

.app-pill:hover {
  background: rgba(139, 92, 246, 0.15);
  border-color: var(--accent-cyan);
  color: #FFFFFF;
}

/* ==================== 价格对比表 ==================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.pricing-card.featured {
  border-color: var(--accent-cyan);
  background: rgba(18, 26, 70, 0.9);
  box-shadow: 0 0 35px rgba(6, 182, 212, 0.25);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card:hover {
  border-color: var(--border-accent);
}

.popular-ribbon {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-brand);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.5);
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 40px;
}

.plan-price-wrapper {
  margin-bottom: 24px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.price {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.85rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1;
}

.period {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.925rem;
  color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

/* ==================== 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-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(10px);
}

.review-stars {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 16px;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
  font-style: italic;
}

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

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: #FFFFFF;
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.4);
}

.reviewer-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: #FFFFFF;
}

.reviewer-title {
  font-size: 0.775rem;
  color: var(--text-muted);
}

/* ==================== 常见问题解答 (FAQ) ==================== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.faq-item:hover {
  border-color: rgba(6, 182, 212, 0.4);
}

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

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

.faq-icon {
  transition: transform 0.25s ease;
  color: var(--accent-cyan);
}

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

.faq-answer {
  padding: 0 24px 20px 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ==================== 底部横幅 CTA ==================== */
.cta-banner {
  margin: 60px 0 20px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.15) 0%, rgba(6, 182, 212, 0.15) 100%);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 56px 36px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 30px rgba(139, 92, 246, 0.2);
}

.cta-banner h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-banner p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 32px;
}

/* ==================== 页脚规范 (只保留4个标题，新窗口打开) ==================== */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: #070a1c;
  padding: 40px 0 36px;
  margin-top: auto;
  position: relative;
  z-index: 2;
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.footer-nav a:hover {
  color: var(--accent-cyan);
  text-shadow: 0 0 8px rgba(6, 182, 212, 0.5);
}

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

/* ==================== 独立页面专用布局 (Subpage) ==================== */
.subpage-header {
  padding: 60px 0 30px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background: rgba(15, 21, 58, 0.4);
  position: relative;
  z-index: 2;
}

.subpage-content {
  padding: 50px 0 80px;
  max-width: 860px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.subpage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

.subpage-card h2 {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-size: 1.5rem;
  color: var(--accent-cyan);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.subpage-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 14px;
}

.subpage-card ul {
  padding-left: 20px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 14px;
}

.subpage-card ul li {
  margin-bottom: 8px;
}

.badge-alert {
  background: rgba(239, 68, 68, 0.12);
  border-left: 4px solid #ef4444;
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: #fca5a5;
  margin: 16px 0;
  font-size: 0.95rem;
}

.badge-privacy-guarantee {
  background: rgba(6, 182, 212, 0.1);
  border-left: 4px solid var(--accent-cyan);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: #a5f3fc;
  margin: 16px 0;
  font-size: 0.95rem;
}

/* ==================== 响应式移动端适配 (@media) ==================== */
@media (max-width: 992px) {
  .hero-two-col {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 48px;
  }

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

  .hero-title {
    font-size: 2.85rem;
  }

  .hero-cta-group {
    justify-content: center;
  }
  
  .features-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-card.featured {
    transform: none;
  }

  .trust-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero-section {
    padding: 50px 0 40px;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 48px;
  }

  .features-grid,
  .support-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .trust-stats {
    grid-template-columns: 1fr 1fr;
    padding: 18px;
  }

  .section-title {
    font-size: 1.85rem;
  }

  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }

  .cta-banner {
    padding: 40px 20px;
  }

  .cta-banner h2 {
    font-size: 1.75rem;
  }

  .subpage-card {
    padding: 24px 18px;
  }

  .quantum-scene {
    width: 280px;
    height: 280px;
    transform: scale(0.85);
  }
}


/* ==========================================================================
   知识科普与 SEO 文章专区样式拓展 (Tech Wiki & SEO Articles)
   ========================================================================== */

.wiki-layout {
  display: grid;
  grid-template-columns: 290px 1fr;
  gap: 36px;
  align-items: start;
  margin-top: 40px;
}

/* 侧边栏文章目录 */
.wiki-sidebar {
  position: sticky;
  top: 90px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.wiki-sidebar-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  gap: 8px;
}

.wiki-toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.wiki-toc-link {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  line-height: 1.45;
  transition: var(--transition);
  border-left: 2px solid transparent;
}

.wiki-toc-link:hover {
  color: #FFFFFF;
  background: rgba(139, 92, 246, 0.12);
  border-left-color: var(--accent-cyan);
  transform: translateX(4px);
}

/* 文章流与正文排版 */
.articles-stream {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.seo-article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 34px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: relative;
  transition: var(--transition);
}

.seo-article-card:hover {
  border-color: rgba(6, 182, 212, 0.4);
  box-shadow: 0 10px 35px rgba(10, 14, 39, 0.7);
}

.article-header {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.article-category-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.775rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent-purple);
  border: 1px solid rgba(139, 92, 246, 0.3);
  margin-bottom: 12px;
}

.article-title {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1.35;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.825rem;
  flex-wrap: wrap;
}

.article-body {
  color: var(--text-secondary);
  font-size: 0.985rem;
  line-height: 1.85;
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #FFFFFF;
  margin: 24px 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-body h3::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 16px;
  background: var(--gradient-brand);
  border-radius: 2px;
}

.article-body p {
  margin-bottom: 16px;
  text-align: justify;
}

.article-body ul, .article-body ol {
  padding-left: 20px;
  margin-bottom: 18px;
}

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

.article-body strong {
  color: #FFFFFF;
  font-weight: 600;
}

/* 核心内链与外链强调样式 */
.internal-link {
  color: var(--accent-cyan);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: var(--transition);
}

.internal-link:hover {
  color: #FFFFFF;
  text-shadow: 0 0 10px rgba(6, 182, 212, 0.8);
}

.article-footer-cta {
  margin-top: 28px;
  padding: 20px 24px;
  background: rgba(15, 21, 58, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.article-footer-cta-text {
  font-size: 0.925rem;
  color: var(--text-secondary);
}

.article-footer-cta-text strong {
  color: #FFFFFF;
}

@media (max-width: 992px) {
  .wiki-layout {
    grid-template-columns: 1fr;
  }
  
  .wiki-sidebar {
    position: static;
    max-height: none;
  }

  .seo-article-card {
    padding: 28px 20px;
  }

  .article-title {
    font-size: 1.4rem;
  }
}


/* 文章专属 FAQ 问答模块样式 */
.article-faq-wrap {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
}

.article-faq-title {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.article-faq-item {
  background: rgba(10, 14, 39, 0.55);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition);
}

.article-faq-item:hover {
  border-color: var(--accent-cyan);
}

.article-faq-q {
  padding: 14px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #FFFFFF;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}

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

.article-faq-icon {
  transition: transform 0.25s ease;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

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

.article-faq-a {
  padding: 0 18px 16px 18px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.75;
}


/* ==========================================================================
   系统减弱动画偏好适配 (prefers-reduced-motion: reduce)
   ========================================================================== */
@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;
  }
  .stream-light,
  .glow-halo,
  .hex-svg,
  .cube-3d-wrap,
  .orbit-track,
  .koi-svg-element,
  .cube-vertex {
    animation: none !important;
  }
  .cube-3d-wrap {
    transform: rotateX(20deg) rotateY(30deg) !important;
  }
}