/* ==========================================================================
   xsus 极速网络加速器 / 气泡云机场 - 原生极简高效样式表
   零重型框架依赖 · 纯原生 CSS · 毫秒级极速渲染 · 完美适配移动端
   ========================================================================== */

:root {
  --bg-primary: #07090e;
  --bg-secondary: #0d121f;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(26, 36, 56, 0.85);
  --bg-glass: rgba(13, 18, 31, 0.8);
  
  --accent-cyan: #06b6d4;
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-glow: rgba(59, 130, 246, 0.25);
  --accent-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  --accent-gradient-hover: linear-gradient(135deg, #1d4ed8 0%, #6d28d9 100%);
  --cyan-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --border-light: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(59, 130, 246, 0.4);
  --border-glow: 0 0 25px rgba(59, 130, 246, 0.2);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "Fira Code", Consolas, Monaco, "Courier New", monospace;
  
  --container-max: 1200px;
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 85px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #151e36 0%, #07090e 70%);
}

/* 页面主体容器 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* 链接与按钮通用 */
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

img, svg {
  display: block;
  max-width: 100%;
}

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

/* 视觉修饰元素 */
.glow-spot {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}
.glow-spot-top {
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(59, 130, 246, 0.18);
}
.glow-spot-mid {
  top: 40%;
  right: -10%;
  background: rgba(139, 92, 246, 0.12);
}

/* ==========================================================================
   导航栏 (Navbar)
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 76px;
  z-index: 1000;
  background: rgba(7, 9, 14, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

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

/* 品牌 Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.brand-icon-box {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
}

.brand-icon-box svg {
  width: 22px;
  height: 22px;
  fill: #ffffff;
}

.brand-text {
  background: linear-gradient(135deg, #ffffff 40%, #93c5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-tag {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
  margin-left: 2px;
}

/* 导航链接 */
.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

.nav-item a {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 2px;
}

.nav-item a:hover {
  color: var(--text-primary);
}

.nav-item a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-cyan);
  transition: width 0.25s ease;
}

.nav-item a:hover::after {
  width: 100%;
}

.nav-badge-hot {
  font-size: 0.65rem;
  padding: 1px 5px;
  border-radius: 4px;
  background: #ef4444;
  color: #fff;
  margin-left: 4px;
  font-weight: 700;
  vertical-align: middle;
}

/* 导航栏右侧操作按钮 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-ghost {
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
  background: rgba(255, 255, 255, 0.04);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 22px;
  border-radius: var(--radius-full);
  font-size: 0.92rem;
  font-weight: 600;
  color: #ffffff;
  background: var(--accent-gradient);
  box-shadow: 0 4px 18px rgba(37, 99, 235, 0.35);
  transition: var(--transition);
}

.btn-primary:hover {
  background: var(--accent-gradient-hover);
  box-shadow: 0 6px 24px rgba(37, 99, 235, 0.5);
  transform: translateY(-1px);
}

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* ==========================================================================
   首屏横幅区 (Hero Section)
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 160px 0 90px;
  text-align: center;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
}

/* 折扣活动标签 */
.promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: #fcd34d;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.15);
  animation: pulseBadge 2.5s infinite;
}

@keyframes pulseBadge {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

.promo-badge-icon {
  display: inline-block;
  font-size: 1rem;
}

/* 主标题与副标题 */
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -1px;
  margin-bottom: 22px;
}

.hero-highlight {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: clamp(1.02rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 38px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

/* CTA 按钮组 */
.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn-hero-primary {
  padding: 15px 36px;
  font-size: 1.08rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.45);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition);
}

.btn-hero-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(37, 99, 235, 0.6);
  background: var(--accent-gradient-hover);
}

.btn-hero-secondary {
  padding: 14px 30px;
  font-size: 1.02rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.btn-hero-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  color: #38bdf8;
}

/* 信任背书特性条 */
.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, 0.06);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.trust-item-icon {
  color: #10b981;
  font-size: 1.05rem;
}

/* ==========================================================================
   核心优势图卡区 (Dynamic Cards Section)
   ========================================================================== */
.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.12);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  border: 1px solid rgba(6, 182, 212, 0.25);
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
  line-height: 1.25;
}

.section-desc {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 三列核心优势网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(12px);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-highlight);
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35), var(--border-glow);
}

.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--accent-cyan);
}

.feature-icon-wrapper svg {
  width: 28px;
  height: 28px;
}

.feature-title {
  font-size: 1.28rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-text {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* 流媒体与 AI 支持图卡 */
.media-ai-card {
  background: linear-gradient(135deg, rgba(17, 24, 39, 0.85) 0%, rgba(30, 41, 59, 0.65) 100%);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: var(--radius-lg);
  padding: 40px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.media-ai-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.18) 0%, transparent 70%);
  pointer-events: none;
}

.media-ai-content {
  position: relative;
  z-index: 1;
}

.media-ai-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.media-ai-title {
  font-size: 1.45rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: #ffffff;
}

.media-ai-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.6;
}

/* 服务徽章与平台列表 */
.platform-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
}

.platform-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: var(--transition);
}

.platform-pill:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(59, 130, 246, 0.4);
  transform: translateY(-2px);
}

.platform-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
}

/* ==========================================================================
   定价卡片区 (Pricing Section)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(14px);
}

.pricing-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* 推荐套餐特殊高亮 */
.pricing-card-featured {
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.95) 0%, rgba(15, 23, 42, 0.95) 100%);
  border: 2px solid #3b82f6;
  box-shadow: 0 16px 40px rgba(37, 99, 235, 0.25), 0 0 25px rgba(59, 130, 246, 0.15);
  transform: scale(1.02);
}

.pricing-card-featured:hover {
  transform: scale(1.02) translateY(-5px);
  border-color: #60a5fa;
  box-shadow: 0 20px 50px rgba(37, 99, 235, 0.35), 0 0 35px rgba(59, 130, 246, 0.25);
}

.badge-featured {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.pricing-header {
  margin-bottom: 24px;
}

.pricing-plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.pricing-plan-subtitle {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* 价格数值展示 */
.pricing-price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: #38bdf8;
}

.price-amount {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  color: #ffffff;
}

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

.traffic-pill {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  background: rgba(59, 130, 246, 0.12);
  color: #60a5fa;
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 20px;
}

/* 套餐特性列表 */
.pricing-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.pricing-feature-item svg {
  width: 18px;
  height: 18px;
  fill: #10b981;
  flex-shrink: 0;
}

/* 定价卡片 CTA 按钮 */
.pricing-btn {
  display: block;
  width: 100%;
  text-align: center;
  padding: 13px 20px;
  border-radius: var(--radius-full);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.pricing-btn:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.3);
  color: #ffffff;
}

.pricing-btn-featured {
  background: var(--accent-gradient);
  border: none;
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
}

.pricing-btn-featured:hover {
  background: var(--accent-gradient-hover);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.55);
  transform: translateY(-1px);
}

/* ==========================================================================
   深度特性解析区 (Why Choose Section)
   ========================================================================== */
.why-section {
  padding: 90px 0;
  background: radial-gradient(circle at 50% 50%, rgba(15, 23, 42, 0.6) 0%, transparent 100%);
}

.deep-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  margin-bottom: 70px;
}

.deep-row:last-child {
  margin-bottom: 0;
}

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

.deep-content {
  display: flex;
  flex-direction: column;
}

.deep-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}

.deep-title {
  font-size: 1.85rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.deep-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
}

.deep-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.deep-list-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.94rem;
  color: var(--text-primary);
}

.deep-list-item svg {
  width: 18px;
  height: 18px;
  fill: #38bdf8;
  flex-shrink: 0;
}

/* 视觉面板 1：动态数据仪表板 */
.stats-dashboard {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(12px);
}

.stats-dash-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-light);
}

.dash-status-dot {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #10b981;
}

.pulse-circle {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.stats-dash-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stat-dash-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 16px;
}

.stat-dash-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.2;
}

.stat-dash-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* 视觉面板 2：极客风格终端代码块 (Strict_No_Logs_Policy.sh) */
.terminal-window {
  background: #090c15;
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.6), 0 0 20px rgba(6, 182, 212, 0.1);
  overflow: hidden;
  font-family: var(--font-mono);
}

.terminal-header {
  background: #111625;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.terminal-dots {
  display: flex;
  gap: 7px;
  margin-right: 14px;
}

.terminal-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.terminal-title {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.terminal-body {
  padding: 20px;
  font-size: 0.86rem;
  line-height: 1.7;
  color: #cbd5e1;
}

.term-cmd {
  color: #38bdf8;
  font-weight: 600;
  margin-bottom: 8px;
}
.term-cmd-prompt {
  color: #a855f7;
}

.term-line {
  margin-bottom: 4px;
}
.term-tag-info { color: #60a5fa; }
.term-tag-ok { color: #34d399; font-weight: 700; }
.term-tag-success { color: #10b981; font-weight: 800; }
.term-tag-warn { color: #fbbf24; }
.term-cursor {
  display: inline-block;
  width: 8px;
  height: 14px;
  background: #38bdf8;
  vertical-align: middle;
  animation: blinkCursor 1s step-end infinite;
}

@keyframes blinkCursor {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ==========================================================================
   底部转化拦截区 (CTA Section)
   ========================================================================== */
.cta-banner-section {
  padding: 60px 0 80px;
}

.cta-banner-card {
  background: linear-gradient(135deg, #1e3a8a 0%, #312e81 50%, #4c1d95 100%);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(30, 58, 138, 0.4);
}

.cta-banner-card::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -20%;
  width: 140%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.cta-banner-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 14px;
  color: #ffffff;
}

.cta-banner-desc {
  font-size: 1.05rem;
  color: #e0e7ff;
  max-width: 650px;
  margin: 0 auto 32px;
  line-height: 1.6;
}

.cta-banner-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 44px;
  border-radius: var(--radius-full);
  background: #ffffff;
  color: #1e1b4b;
  font-size: 1.1rem;
  font-weight: 800;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
  transition: var(--transition);
}

.cta-banner-btn:hover {
  transform: translateY(-2px) scale(1.02);
  background: #f8fafc;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.35);
}

/* ==========================================================================
   用户评价跑马灯区 (Testimonials Marquee Section)
   ========================================================================== */
.testimonials-section {
  padding: 80px 0;
  overflow: hidden;
}

.marquee-outer {
  position: relative;
  width: 100%;
  overflow: hidden;
  padding: 20px 0;
  mask-image: linear-gradient(to right, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, #000 10%, #000 90%, transparent);
}

.marquee-track {
  display: flex;
  gap: 22px;
  width: max-content;
  animation: scrollMarquee 38s linear infinite;
}

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

@keyframes scrollMarquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(calc(-50% - 11px)); }
}

.testimonial-card {
  width: 360px;
  flex-shrink: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.testimonial-card:hover {
  border-color: rgba(59, 130, 246, 0.4);
  background: var(--bg-card-hover);
}

.testimonial-stars {
  color: #fbbf24;
  font-size: 0.95rem;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.testimonial-quote {
  font-size: 0.92rem;
  color: #e2e8f0;
  line-height: 1.6;
  margin-bottom: 18px;
}

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

.author-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
}

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

.author-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

/* ==========================================================================
   常见问题解答区 (FAQ Section)
   ========================================================================== */
.faq-section {
  padding: 80px 0 100px;
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.18);
}

.faq-item[open] {
  border-color: rgba(59, 130, 246, 0.4);
  background: rgba(17, 24, 39, 0.9);
}

.faq-summary {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  user-select: none;
}

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

.faq-chevron {
  width: 20px;
  height: 20px;
  fill: var(--text-muted);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
  fill: var(--accent-cyan);
}

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

/* ==========================================================================
   页脚 (Footer) - 严格保留四大标题并支持新页面展示
   ========================================================================== */
.footer {
  background: #05070a;
  border-top: 1px solid var(--border-light);
  padding: 42px 0 32px;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  list-style: none;
}

.footer-nav-link {
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
  padding: 4px 8px;
}

.footer-nav-link:hover {
  color: #38bdf8;
}

.footer-bottom {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 22px;
}

/* ==========================================================================
   响应式适配 (@media 针对移动端与平板)
   ========================================================================== */
@media (max-width: 992px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
  
  .pricing-card-featured {
    transform: none;
  }
  .pricing-card-featured:hover {
    transform: translateY(-5px);
  }
  
  .deep-row, .deep-row-reverse {
    grid-template-columns: 1fr;
    direction: ltr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  html {
    scroll-padding-top: 70px;
  }

  .navbar {
    height: 68px;
  }

  .nav-toggle {
    display: flex;
  }

  /* 移动端抽屉菜单 */
  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(7, 9, 14, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    border-bottom: 1px solid var(--border-light);
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-item a {
    font-size: 1.05rem;
    display: block;
    width: 100%;
    padding: 8px 0;
  }

  .nav-actions {
    display: none;
  }

  /* 首屏移动端优化 */
  .hero-section {
    padding: 120px 0 60px;
  }

  .hero-title {
    font-size: 2.1rem;
  }

  .hero-desc {
    font-size: 0.98rem;
  }

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

  .btn-hero-primary,
  .btn-hero-secondary {
    width: 100%;
    min-height: 48px;
    justify-content: center;
  }

  .hero-trust-bar {
    gap: 16px;
    font-size: 0.82rem;
  }

  /* 特性与媒体卡片 */
  .media-ai-card {
    padding: 24px;
  }

  .platform-badges {
    gap: 8px;
  }

  .platform-pill {
    font-size: 0.8rem;
    padding: 6px 12px;
  }

  /* 定价与深层特性 */
  .pricing-card {
    padding: 28px 20px;
  }

  .stats-dash-grid {
    grid-template-columns: 1fr;
  }

  .terminal-body {
    padding: 14px;
    font-size: 0.78rem;
  }

  /* 底部卡片 */
  .cta-banner-card {
    padding: 38px 20px;
  }

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

  .footer-nav {
    gap: 18px;
    flex-direction: column;
  }
}