/* ===================================================================
   乌龟加速 (Turtle Speed Network) - 官网.com 专属顶级暗黑极客风格
   纯原生 CSS3，零重型框架，秒开加载，极致玻璃拟态与赛博霓虹美学
   =================================================================== */

:root {
  --bg-dark: #000000;
  --bg-surface: #0a0a0a;
  --bg-card: rgba(255, 255, 255, 0.035);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  
  /* 官网.com 专属紫蓝青渐变体系 */
  --primary: #8b5cf6;
  --primary-blue: #3b82f6;
  --primary-cyan: #06b6d4;
  --primary-gradient: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
  --cyan-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --text-gradient: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 50%, #06b6d4 100%);
  
  --text-main: #ffffff;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --border-light: rgba(255, 255, 255, 0.08);
  --border-purple: rgba(139, 92, 246, 0.4);
  --glow-purple: 0 10px 40px rgba(139, 92, 246, 0.4);
  --glow-purple-lg: 0 15px 50px rgba(139, 92, 246, 0.6);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Fira Code", "JetBrains Mono", Consolas, Monaco, monospace;
  
  --container-max: 1240px;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background-color: #000000;
}

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

ul, ol {
  list-style: none;
}

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 96px 0;
  position: relative;
  z-index: 10;
}

/* ===================================================================
   官网.com 同款高级动态背景与平滑光晕
   =================================================================== */
.premium-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 15% 15%, rgba(139, 92, 246, 0.22) 0%, transparent 45%),
    radial-gradient(circle at 85% 55%, rgba(59, 130, 246, 0.18) 0%, transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(6, 182, 212, 0.14) 0%, transparent 45%),
    linear-gradient(180deg, #000000 0%, #06080e 100%);
  z-index: 0;
  pointer-events: none;
}

.grid-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(139, 92, 246, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 92, 246, 0.08) 1px, transparent 1px);
  background-size: 50px 50px;
  z-index: 1;
  opacity: 0.35;
  animation: gridMove 25s linear infinite;
  pointer-events: none;
}

@keyframes gridMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(50px, 50px); }
}

/* 渐变文本与文字高光 */
.gradient-text {
  background: var(--text-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-glow {
  text-shadow: 0 0 35px rgba(139, 92, 246, 0.5);
}

/* 标题样式 */
.section-title-wrap {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 56px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: #a78bfa;
  background: rgba(139, 92, 246, 0.12);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(139, 92, 246, 0.3);
  margin-bottom: 18px;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===================================================================
   官网.com 专属高级玻璃态卡片 (.glass-card)
   =================================================================== */
.glass-card {
  background: rgba(255, 255, 255, 0.035);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.6), transparent);
}

.glass-card:hover {
  background: rgba(255, 255, 255, 0.065);
  border-color: rgba(139, 92, 246, 0.45);
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(139, 92, 246, 0.22);
}

/* 闪光效果 */
.shimmer-effect {
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
  animation: shimmerAnim 3s infinite;
}

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

/* ===================================================================
   官网.com 专属高级按钮 (.premium-btn)
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  white-space: nowrap;
  outline: none;
}

.btn-primary, .premium-btn {
  position: relative;
  background: var(--primary-gradient);
  color: #ffffff;
  border-radius: 16px;
  box-shadow: var(--glow-purple);
  overflow: hidden;
}

.btn-primary:hover, .premium-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-purple-lg);
  color: #ffffff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  border-radius: 16px;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(139, 92, 246, 0.4);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.86rem;
  border-radius: var(--radius-full);
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.15rem;
  font-weight: 700;
}

/* ===================================================================
   导航栏 (Navbar)
   =================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 76px;
  z-index: 1000;
  transition: all var(--transition-normal);
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* 官网.com 同款 Logo 结构 */
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-avatar-box {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  overflow: hidden;
  border: 2px solid rgba(139, 92, 246, 0.5);
  box-shadow: 0 0 16px rgba(139, 92, 246, 0.4);
  flex-shrink: 0;
  background: #000;
}

.brand-avatar-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.brand-slogan {
  font-size: 0.72rem;
  color: var(--text-dim);
  font-weight: 500;
  letter-spacing: 0.5px;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  font-size: 0.94rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: color var(--transition-normal);
  padding: 6px 0;
}

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

.nav-link-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 0.7rem;
  font-weight: 700;
  background: linear-gradient(135deg, #a855f7, #6366f1);
  color: #fff;
  border-radius: var(--radius-full);
  margin-left: 6px;
  box-shadow: 0 0 10px rgba(168, 85, 247, 0.5);
}

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

.hamburger {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
}

/* ===================================================================
   Hero Section
   =================================================================== */
.hero-section {
  padding-top: 155px;
  padding-bottom: 80px;
  text-align: center;
  position: relative;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
}

.hero-pill-bar {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(139, 92, 246, 0.35);
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  box-shadow: 0 0 25px rgba(139, 92, 246, 0.2);
}

.live-dot-ping {
  position: relative;
  display: flex;
  height: 10px;
  width: 10px;
}

.live-dot-ping .ping {
  position: absolute;
  height: 100%;
  width: 100%;
  border-radius: 50%;
  background: #10b981;
  opacity: 0.75;
  animation: pingEffect 1.8s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.live-dot-ping .dot {
  position: relative;
  height: 10px;
  width: 10px;
  border-radius: 50%;
  background: #10b981;
}

@keyframes pingEffect {
  75%, 100% {
    transform: scale(2.2);
    opacity: 0;
  }
}

.hero-pill-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: #e2e8f0;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 780px;
  margin: 0 auto 36px auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 48px;
}

/* 官网.com 首屏核心三列玻璃数据面板 */
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  max-width: 680px;
  margin: 0 auto 40px auto;
}

.hero-stat-card {
  padding: 16px;
  border-radius: var(--radius-md);
  text-align: center;
}

.hero-stat-num {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.1;
}

.hero-stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.hero-trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.88rem;
  color: var(--text-dim);
}

.hero-trust-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-trust-item svg {
  color: #10b981;
}

/* ===================================================================
   核心优势卡片区 (Features Grid)
   =================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 36px;
}

.feature-card {
  padding: 36px 30px;
}

.icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  margin-bottom: 24px;
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.4);
}

.feature-card h3 {
  font-size: 1.35rem;
  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 横幅 */
.media-ai-card {
  padding: 44px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.media-ai-info h3 {
  font-size: 1.85rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: #ffffff;
}

.media-ai-info p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 24px;
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tech-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: #e2e8f0;
}

.tech-tag svg {
  color: var(--primary-blue);
}

.media-ai-badges-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.badge-item {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.badge-item-icon {
  font-size: 1.8rem;
}

.badge-item-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
}

.badge-item-sub {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ===================================================================
   定价卡片区 (Pricing Grid)
   =================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  padding: 42px 32px;
  display: flex;
  flex-direction: column;
}

.pricing-card.featured {
  border-color: rgba(139, 92, 246, 0.6);
  box-shadow: 0 0 45px rgba(139, 92, 246, 0.3);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
  box-shadow: 0 0 60px rgba(139, 92, 246, 0.45);
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 5px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.5);
}

.pricing-header {
  text-align: center;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 24px;
}

.pricing-name {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.pricing-cost {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin: 16px 0 8px 0;
}

.pricing-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: #a78bfa;
}

.pricing-amount {
  font-size: 3.2rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
}

.pricing-period {
  font-size: 0.95rem;
  color: var(--text-dim);
}

.pricing-traffic-badge {
  display: inline-block;
  padding: 5px 14px;
  background: rgba(139, 92, 246, 0.15);
  color: #c4b5fd;
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  margin-top: 10px;
}

.pricing-features {
  flex-grow: 1;
  margin-bottom: 32px;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.pricing-feature-item svg {
  color: #10b981;
  flex-shrink: 0;
}

.pricing-cta {
  width: 100%;
}

/* ===================================================================
   深度特性解析区 (Why Choose & Terminal)
   =================================================================== */
.why-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 80px;
}

.why-row.reverse {
  direction: rtl;
}

.why-row.reverse > * {
  direction: ltr;
}

.why-content h3 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 18px;
  color: #ffffff;
}

.why-content p {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 24px;
}

.why-metrics-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.why-metric-box {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 22px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--transition-normal);
}

.why-metric-box:hover {
  background: rgba(255, 255, 255, 0.065);
  border-color: rgba(139, 92, 246, 0.4);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(139, 92, 246, 0.15);
}

.metric-box-num {
  font-size: 1.85rem;
  font-weight: 800;
  margin-bottom: 6px;
  background: var(--text-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.metric-box-label {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* 动态遥测仪表盘 */
.dynamic-dashboard {
  background: rgba(8, 10, 16, 0.85);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 28px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(139, 92, 246, 0.15);
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 20px;
}

.status-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: #10b981;
  font-weight: 600;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: dotPulse 1.8s infinite;
}

@keyframes dotPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.dash-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.dash-stat-item {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
}

.dash-stat-val {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
}

.dash-stat-name {
  font-size: 0.76rem;
  color: var(--text-dim);
  margin-top: 4px;
}

.dash-meter-bar {
  background: rgba(255, 255, 255, 0.08);
  height: 8px;
  border-radius: 4px;
  overflow: hidden;
  margin: 16px 0 8px 0;
}

.dash-meter-progress {
  height: 100%;
  width: 98%;
  background: var(--text-gradient);
  border-radius: 4px;
}

.dash-subtext {
  font-size: 0.8rem;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
}

/* 终端代码块 */
.terminal-window {
  background: #05070c;
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
  overflow: hidden;
  font-family: var(--font-mono);
}

.terminal-header {
  background: #0d111a;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.term-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

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

.term-title {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-left: 8px;
}

.terminal-body {
  padding: 22px;
  font-size: 0.85rem;
  line-height: 1.75;
  color: #c4b5fd;
}

.term-line { margin-bottom: 6px; }
.term-prompt { color: #38bdf8; }
.term-success { color: #4ade80; }
.term-comment { color: #64748b; }
.term-highlight { color: #fbbf24; }

/* ===================================================================
   用户好评跑马灯区 (Testimonials)
   =================================================================== */
.marquee-container {
  overflow: hidden;
  user-select: none;
  position: relative;
  padding: 10px 0;
}

.marquee-container::before,
.marquee-container::after {
  content: "";
  position: absolute;
  top: 0;
  width: 150px;
  height: 100%;
  z-index: 2;
  pointer-events: none;
}

.marquee-container::before {
  left: 0;
  background: linear-gradient(90deg, #000000, transparent);
}

.marquee-container::after {
  right: 0;
  background: linear-gradient(270deg, #000000, transparent);
}

.marquee-track {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: marqueeScroll 36s linear infinite;
}

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

@keyframes marqueeScroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.testimonial-card {
  width: 360px;
  padding: 26px;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.035);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.testimonial-card:hover {
  background: rgba(255, 255, 255, 0.065);
  border-color: rgba(139, 92, 246, 0.45);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(139, 92, 246, 0.15);
}

.test-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.test-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.test-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.3), rgba(59, 130, 246, 0.3));
  border: 1px solid rgba(139, 92, 246, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 0.95rem;
}

.test-name {
  font-size: 0.98rem;
  font-weight: 700;
  color: #fff;
}

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

.test-stars {
  color: #fbbf24;
  font-size: 0.85rem;
  letter-spacing: 2px;
}

.test-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ===================================================================
   FAQ Section
   =================================================================== */
.faq-accordion {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.faq-item[open] {
  border-color: rgba(139, 92, 246, 0.45);
  background: rgba(255, 255, 255, 0.055);
  box-shadow: 0 10px 30px rgba(139, 92, 246, 0.1);
}

.faq-summary {
  padding: 20px 26px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

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

.faq-icon-arrow {
  transition: transform var(--transition-normal);
  color: #a78bfa;
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 26px 22px 26px;
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.75;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 16px;
}

/* ===================================================================
   底部 CTA 转化横幅
   =================================================================== */
.cta-banner {
  padding: 68px 32px;
  text-align: center;
  background: 
    radial-gradient(ellipse at top, rgba(139, 92, 246, 0.25) 0%, transparent 70%),
    rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(139, 92, 246, 0.35);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 20px 60px rgba(139, 92, 246, 0.18);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.8), transparent);
}

.cta-banner h2 {
  font-size: 2.7rem;
  font-weight: 900;
  margin-bottom: 16px;
  color: #ffffff;
}

.cta-banner p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 660px;
  margin: 0 auto 36px auto;
}

/* ===================================================================
   页脚 (Footer)
   =================================================================== */
.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 40px 0;
  background: #000000;
  text-align: center;
  position: relative;
  z-index: 10;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

.footer-link:hover {
  color: #a78bfa;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* ===================================================================
   移动端响应式 (@media)
   =================================================================== */
@media (max-width: 992px) {
  .features-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .media-ai-card {
    grid-template-columns: 1fr;
    padding: 30px;
  }
  
  .why-row,
  .why-row.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
    gap: 36px;
  }
  
  .hero-title {
    font-size: 2.6rem;
  }
}

@media (max-width: 768px) {
  .navbar-menu {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: rgba(5, 5, 5, 0.98);
    backdrop-filter: blur(25px);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    gap: 16px;
    align-items: flex-start;
  }
  
  .navbar-menu.active {
    display: flex;
  }
  
  .hamburger {
    display: block;
  }
  
  .brand-slogan {
    display: none;
  }
  
  .hero-title {
    font-size: 2.1rem;
  }
  
  .hero-desc {
    font-size: 1rem;
  }
  
  .hero-stats-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  
  .section {
    padding: 64px 0;
  }
  
  .cta-banner h2 {
    font-size: 2rem;
  }
  
  .media-ai-badges-grid,
  .why-metrics-list,
  .dash-stats-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-cta-group .btn {
    width: 100%;
  }
  
  .footer-nav {
    gap: 20px;
  }
}