/* ==========================================================================
   网际快车 (FlashFX) - 苹果级暗黑磨砂玻璃风 (Apple Dark Glassmorphism)
   极简无依赖 | 极致秒开 | 细腻高斯模糊与微光倒角质感
   ========================================================================== */

:root {
  /* 基础深岩黑底色 */
  --bg-primary: #070a13;
  --bg-secondary: #0c121e;
  
  /* 苹果级磨砂玻璃卡片 */
  --bg-card: rgba(255, 255, 255, 0.035);
  --bg-card-hover: rgba(255, 255, 255, 0.065);
  --bg-card-strong: rgba(15, 23, 42, 0.65);
  
  /* 极细 1px 微光反射边框 */
  --border-color: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.16);
  --border-highlight: rgba(56, 189, 248, 0.45);
  
  /* 苹果内倒角高光反光效果 (Apple Specular Edge) */
  --specular-inner: inset 0 1px 1px 0 rgba(255, 255, 255, 0.15);
  --specular-subtle: inset 0 1px 0 0 rgba(255, 255, 255, 0.08);

  /* 磨砂滤镜规范 */
  --glass-blur: blur(28px) saturate(190%);
  --glass-blur-sm: blur(16px) saturate(180%);

  /* 文本层次色调 */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* 点缀色 (SF 风格冷光科技调) */
  --accent-cyan: #38bdf8;
  --accent-blue: #0ea5e9;
  --accent-indigo: #6366f1;
  --accent-purple: #a855f7;
  --accent-green: #10b981;
  --accent-orange: #f59e0b;
  
  /* 渐变流光 */
  --gradient-brand: linear-gradient(135deg, #38bdf8 0%, #3b82f6 50%, #8b5cf6 100%);
  --gradient-btn: linear-gradient(180deg, #0ea5e9 0%, #0284c7 100%);
  --gradient-btn-hover: linear-gradient(180deg, #38bdf8 0%, #0284c7 100%);
  
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;
  
  /* 苹果 San Francisco 字体族降级链 */
  --font-main: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  /* 阴影层次 */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.65);
  --shadow-glass: inset 0 1px 1px 0 rgba(255, 255, 255, 0.12), 0 20px 40px -15px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 35px -5px rgba(56, 189, 248, 0.3);
}

/* ==========================================================================
   基础与页面背景 (Ambient Mesh Backlight)
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.12) 0%, transparent 60%),
    radial-gradient(circle at 15% 30%, rgba(99, 102, 241, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 85% 65%, rgba(168, 85, 247, 0.07) 0%, transparent 50%),
    radial-gradient(circle at 50% 90%, rgba(14, 165, 233, 0.06) 0%, transparent 50%);
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 文字渐变与标签 */
.text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 6px 14px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.22);
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  box-shadow: var(--specular-subtle);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px auto;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.025em;
  color: #ffffff;
}

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

/* ==========================================================================
   苹果级精致按钮 (Apple Frosted & Specular Buttons)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
  line-height: 1;
  position: relative;
  overflow: hidden;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--gradient-btn);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: inset 0 1px 0 0 rgba(255, 255, 255, 0.3), 0 8px 24px -4px rgba(14, 165, 233, 0.45);
}

.btn-primary:hover {
  background: var(--gradient-btn-hover);
  transform: translateY(-2px);
  box-shadow: inset 0 1px 0 0 rgba(255, 255, 255, 0.4), 0 12px 28px -4px rgba(14, 165, 233, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  box-shadow: var(--specular-subtle);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  color: #ffffff;
  box-shadow: inset 0 1px 0 0 rgba(255, 255, 255, 0.18), 0 8px 20px rgba(0, 0, 0, 0.3);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
}

.btn-outline:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
}

.btn-lg {
  padding: 16px 38px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

/* ==========================================================================
   导航栏 (Navbar - macOS 悬浮顶栏设计)
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(7, 10, 19, 0.72);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  transition: all 0.3s ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: linear-gradient(135deg, #0ea5e9 0%, #3b82f6 50%, #8b5cf6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.4), 0 4px 15px rgba(14, 165, 233, 0.4);
}

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

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 4px;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: var(--radius-full);
  transition: width 0.25s ease;
}

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

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

.menu-toggle {
  display: none;
}

.hamburger-btn {
  display: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.hamburger-line {
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ==========================================================================
   首屏横幅区 (Hero Section)
   ========================================================================== */
.hero-section {
  padding-top: 175px;
  padding-bottom: 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: 40px;
  left: 50%;
  transform: translateX(-50%);
  width: 750px;
  height: 420px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.18) 0%, rgba(139, 92, 246, 0.12) 35%, transparent 70%);
  filter: blur(75px);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 940px;
  margin: 0 auto;
}

.promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(245, 158, 11, 0.09);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 8px 22px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  color: #fbbf24;
  margin-bottom: 28px;
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  box-shadow: inset 0 1px 1px 0 rgba(245, 158, 11, 0.2), 0 4px 20px rgba(245, 158, 11, 0.12);
  animation: pulse-glow 3.5s infinite ease-in-out;
}

@keyframes pulse-glow {
  0%, 100% { transform: scale(1); box-shadow: 0 4px 20px rgba(245, 158, 11, 0.12); }
  50% { transform: scale(1.02); box-shadow: 0 8px 30px rgba(245, 158, 11, 0.25); }
}

.hero-title {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
  color: #ffffff;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 820px;
  margin: 0 auto 42px auto;
}

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

/* 磨砂玻璃指标面板 (Glassmorphic Stats Bar) */
.hero-stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  max-width: 900px;
  margin: 0 auto;
  box-shadow: var(--shadow-glass);
}

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

.stat-value {
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #ffffff;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   核心优势图卡区 (Dynamic Cards - 悬浮磨砂玻璃板)
   ========================================================================== */
.features-section {
  padding: 100px 0;
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 36px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 32px;
  position: relative;
  overflow: hidden;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-glass);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  box-shadow: inset 0 1px 1px 0 rgba(255, 255, 255, 0.2), 0 25px 45px -10px rgba(0, 0, 0, 0.65), var(--shadow-glow);
}

.card-icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.22);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 24px;
  font-size: 1.5rem;
  box-shadow: inset 0 1px 1px 0 rgba(255, 255, 255, 0.2);
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #ffffff;
  letter-spacing: -0.015em;
}

.card-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 22px;
}

.card-meta-list {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.card-meta-item svg {
  color: var(--accent-green);
  flex-shrink: 0;
}

/* 流媒体与 AI 全宽大磨砂卡片 */
.media-ai-card {
  background: var(--bg-card);
  border: 1px solid rgba(168, 85, 247, 0.25);
  border-radius: var(--radius-lg);
  padding: 44px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  position: relative;
  overflow: hidden;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: inset 0 1px 1px 0 rgba(255, 255, 255, 0.15), 0 20px 45px rgba(0, 0, 0, 0.55);
}

.media-ai-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(168, 85, 247, 0.5), transparent);
}

.media-ai-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.service-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: #ffffff;
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  box-shadow: var(--specular-subtle);
  transition: all 0.25s ease;
}

.service-badge:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

.streaming-visual-box {
  background: rgba(7, 10, 19, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  box-shadow: inset 0 1px 1px 0 rgba(255, 255, 255, 0.06);
}

.visual-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.025);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.visual-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.9rem;
}

.visual-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--accent-green);
  font-weight: 600;
  background: rgba(16, 185, 129, 0.1);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.visual-status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

/* ==========================================================================
   定价卡片区 (Pricing Section)
   ========================================================================== */
.pricing-section {
  padding: 100px 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 42px 34px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-glass);
}

.pricing-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: rgba(56, 189, 248, 0.35);
  box-shadow: inset 0 1px 1px 0 rgba(255, 255, 255, 0.25), 0 25px 50px -10px rgba(0, 0, 0, 0.7);
}

/* VIP2 官方推荐卡片高光处理 (Apple Pro Badge & Sky Rim Glow) */
.pricing-card.featured {
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(56, 189, 248, 0.55);
  box-shadow: inset 0 1px 1px 0 rgba(255, 255, 255, 0.3), 0 0 35px -5px rgba(14, 165, 233, 0.35), 0 25px 50px -10px rgba(0, 0, 0, 0.7);
  transform: scale(1.03);
}

.pricing-card.featured::before {
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.8), transparent);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  border-color: rgba(56, 189, 248, 0.8);
  box-shadow: inset 0 1px 1px 0 rgba(255, 255, 255, 0.4), 0 0 45px -5px rgba(14, 165, 233, 0.5), 0 30px 60px -10px rgba(0, 0, 0, 0.8);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-brand);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 5px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

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

.plan-name {
  font-size: 1.55rem;
  font-weight: 800;
  margin-bottom: 6px;
  letter-spacing: -0.015em;
}

.plan-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.pricing-cost {
  margin: 24px 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

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

.price-amount {
  font-size: 3.3rem;
  font-weight: 900;
  line-height: 1;
  color: #ffffff;
  letter-spacing: -0.03em;
}

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

.data-allowance {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 8px 14px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-sm);
  color: #38bdf8;
  margin-bottom: 28px;
  width: fit-content;
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  box-shadow: var(--specular-subtle);
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 36px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.pricing-feature-item svg {
  color: var(--accent-cyan);
  flex-shrink: 0;
  margin-top: 3px;
}

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

/* ==========================================================================
   深度特性解析区 (Why Choose Section)
   ========================================================================== */
.why-section {
  padding: 100px 0;
  position: relative;
}

.why-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

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

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

.why-content h3 {
  font-size: 2.1rem;
  font-weight: 800;
  margin-bottom: 18px;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.why-content p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
}

.highlight-points {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.point-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #ffffff;
}

.point-item svg {
  color: var(--accent-green);
  flex-shrink: 0;
}

/* 视觉化动态数据面板 (macOS Activity Monitor Style) */
.data-panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-glass);
  position: relative;
  overflow: hidden;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.data-panel-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

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

.panel-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
}

.live-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--accent-green);
  font-weight: 700;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulse-dot 1.8s infinite;
}

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

.metrics-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.metric-box {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  padding: 18px;
  box-shadow: var(--specular-subtle);
}

.metric-val {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-cyan);
  letter-spacing: -0.02em;
}

.metric-lbl {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.speed-bar-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: rgba(255, 255, 255, 0.02);
  padding: 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.speed-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.speed-bar-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.speed-bar-fill {
  height: 100%;
  width: 96%;
  background: var(--gradient-brand);
  border-radius: var(--radius-full);
  animation: speed-anim 3s infinite alternate ease-in-out;
}

@keyframes speed-anim {
  0% { width: 92%; }
  100% { width: 99.5%; }
}

/* 经典 macOS 终端窗口 (Strict_No_Logs_Policy.sh) */
.terminal-window {
  background: rgba(8, 12, 22, 0.85);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.7), var(--specular-inner);
  font-family: var(--font-mono);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.terminal-header {
  background: rgba(18, 25, 42, 0.7);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

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

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.25);
}

.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

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

.terminal-body {
  padding: 22px;
  font-size: 0.85rem;
  line-height: 1.8;
  color: #cbd5e1;
  overflow-x: auto;
}

.t-comment { color: #64748b; font-style: italic; }
.t-cmd { color: #38bdf8; font-weight: 600; }
.t-arg { color: #f59e0b; }
.t-str { color: #4ade80; }
.t-success { color: #10b981; font-weight: 700; }

/* ==========================================================================
   用户评价跑马灯区 (Testimonials Marquee Section)
   ========================================================================== */
.testimonials-section {
  padding: 100px 0;
  overflow: hidden;
  position: relative;
}

.marquee-container {
  display: flex;
  width: 100%;
  overflow: hidden;
  user-select: none;
  mask-image: linear-gradient(to right, transparent 0%, #000000 12%, #000000 88%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, #000000 12%, #000000 88%, transparent 100%);
}

.marquee-track {
  display: flex;
  gap: 24px;
  animation: marquee-scroll 32s linear infinite;
  padding: 16px 0;
}

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

@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(calc(-50% - 12px)); }
}

.testimonial-card {
  flex-shrink: 0;
  width: 360px;
  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: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-glass);
  transition: all 0.25s ease;
}

.testimonial-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-4px);
}

.review-stars {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 14px;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 18px;
}

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

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.35);
}

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

.user-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
}

.user-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.faq-list {
  max-width: 860px;
  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;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-glass);
  transition: all 0.3s ease;
}

.faq-item[open] {
  border-color: var(--border-highlight);
  background: rgba(255, 255, 255, 0.055);
}

.faq-summary {
  padding: 22px 26px;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  list-style: none;
  user-select: none;
}

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

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--accent-cyan);
  transition: transform 0.3s ease;
}

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

.faq-content {
  padding: 0 26px 24px 26px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ==========================================================================
   底部转化区 (CTA Section)
   ========================================================================== */
.cta-section {
  padding: 90px 0 110px 0;
  position: relative;
}

.cta-box {
  background: radial-gradient(circle at 50% 0%, rgba(14, 165, 233, 0.22) 0%, rgba(15, 23, 42, 0.85) 75%);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-lg);
  padding: 64px 44px;
  text-align: center;
  box-shadow: inset 0 1px 1px 0 rgba(255, 255, 255, 0.25), 0 0 50px rgba(14, 165, 233, 0.2);
  position: relative;
  overflow: hidden;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.cta-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20%;
  right: 20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, #38bdf8, transparent);
}

.cta-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.025em;
  color: #ffffff;
}

.cta-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 36px auto;
  line-height: 1.7;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ==========================================================================
   页脚 (Footer)
   ========================================================================== */
.site-footer {
  background: rgba(5, 7, 13, 0.85);
  border-top: 1px solid var(--border-color);
  padding: 44px 0;
  text-align: center;
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
}

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

.footer-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color 0.25s ease;
}

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

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

/* ==========================================================================
   独立文章页/资讯中心 (About, Terms, Privacy, Sitemap, News)
   ========================================================================== */
.page-container {
  max-width: 900px;
  margin: 120px auto 80px auto;
  padding: 44px 36px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-glass);
}

.page-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 24px;
  margin-bottom: 32px;
}

.page-header h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.article-content {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 1rem;
}

.article-content h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #ffffff;
  margin: 32px 0 14px 0;
}

.article-content p {
  margin-bottom: 16px;
}

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

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

.back-home {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  color: var(--accent-cyan);
  font-size: 0.9rem;
  font-weight: 600;
}

/* ==========================================================================
   资讯中心专属样式 (news-7f3a9.html)
   ========================================================================== */
.articles-hero {
  padding-top: 140px;
  padding-bottom: 50px;
  text-align: center;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.breadcrumb-nav a {
  color: var(--accent-cyan);
}

.toc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 50px;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-glass);
}

.toc-header {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.toc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.toc-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.92rem;
  transition: all 0.25s ease;
}

.toc-item:hover {
  background: rgba(56, 189, 248, 0.08);
  border-color: var(--accent-cyan);
  color: #ffffff;
  transform: translateX(4px);
}

.toc-index {
  color: var(--accent-cyan);
  font-weight: 700;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.seo-article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 46px 40px;
  margin-bottom: 50px;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-glass);
  position: relative;
  scroll-margin-top: 100px;
}

.seo-article-card:hover {
  border-color: rgba(56, 189, 248, 0.3);
}

.article-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 24px;
  margin-bottom: 28px;
}

.article-title {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.35;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: -0.015em;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-tag-pill {
  padding: 4px 12px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-full);
  color: var(--accent-cyan);
  font-size: 0.78rem;
  font-weight: 600;
}

.article-body {
  font-size: 1.02rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-body h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #f8fafc;
  margin: 32px 0 16px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h3::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 20px;
  background: var(--gradient-brand);
  border-radius: 2px;
}

.article-body h4 {
  font-size: 1.15rem;
  font-weight: 600;
  color: #e2e8f0;
  margin: 22px 0 12px 0;
}

.article-body p {
  margin-bottom: 18px;
}

.article-body ul, .article-body ol {
  padding-left: 24px;
  margin-bottom: 22px;
}

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

.seo-dofollow-link {
  color: #38bdf8;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s ease;
}

.seo-dofollow-link:hover {
  color: #93c5fd;
  text-decoration-thickness: 2px;
}

.seo-internal-link {
  color: #34d399;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s ease;
}

.seo-internal-link:hover {
  color: #6ee7b7;
  text-decoration-thickness: 2px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 24px 0 32px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: rgba(7, 10, 19, 0.7);
  box-shadow: var(--specular-subtle);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.comparison-table th {
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
  padding: 14px 18px;
  font-weight: 700;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.comparison-table td {
  padding: 12px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
}

.comparison-table tr:hover td {
  background: rgba(255, 255, 255, 0.03);
}

.article-callout {
  padding: 18px 22px;
  border-radius: var(--radius-md);
  margin: 24px 0;
  background: rgba(56, 189, 248, 0.06);
  border-left: 4px solid var(--accent-cyan);
  color: #cbd5e1;
  font-size: 0.95rem;
}

.article-callout.success {
  background: rgba(16, 185, 129, 0.06);
  border-left-color: var(--accent-green);
}

.article-code {
  background: rgba(6, 9, 16, 0.85);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 18px;
  margin: 20px 0;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: #38bdf8;
  overflow-x: auto;
  line-height: 1.6;
  box-shadow: inset 0 1px 1px 0 rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   响应式媒体查询 (Mobile & Tablet)
   ========================================================================== */
@media (max-width: 1024px) {
  .features-grid,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }
  
  .media-ai-card {
    grid-template-columns: 1fr;
  }
  
  .why-row, .why-row.reverse {
    grid-template-columns: 1fr;
    gap: 40px;
    direction: ltr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    background: rgba(7, 10, 19, 0.95);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    align-items: flex-start;
  }
  
  .menu-toggle:checked ~ .nav-menu {
    display: flex;
  }

  .hamburger-btn {
    display: flex;
  }
  
  .nav-actions {
    display: none;
  }

  .hero-title {
    font-size: 2.4rem;
    letter-spacing: -0.02em;
  }

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

  .hero-stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 20px;
  }

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

  .btn-lg {
    width: 100%;
    padding: 14px 20px;
  }

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

  .hero-cta .btn {
    width: 100%;
  }

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

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

  .toc-grid {
    grid-template-columns: 1fr;
  }

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

  .article-title {
    font-size: 1.5rem;
  }
}