/* ==========================================================================
   365VPN 极致性能与深空霓虹极客风样式库 (Cyber Dark & Neon Tech)
   纯原生 CSS3，0 外部依赖，秒开性能与赛博霓虹视觉双重兼顾
   ========================================================================== */

:root {
  --bg-primary: #060911;
  --bg-secondary: #0b111e;
  --bg-tertiary: #101828;
  --bg-card: rgba(13, 20, 34, 0.75);
  --bg-card-hover: rgba(19, 30, 50, 0.9);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(6, 182, 212, 0.45);
  --border-focus: #06b6d4;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --neon-cyan: #06b6d4;
  --neon-cyan-glow: rgba(6, 182, 212, 0.45);
  --neon-blue: #3b82f6;
  --neon-indigo: #6366f1;
  --neon-purple: #8b5cf6;
  --neon-purple-glow: rgba(139, 92, 246, 0.4);
  --neon-emerald: #10b981;
  --neon-amber: #f59e0b;

  --gradient-brand: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
  --gradient-neon-cyan: linear-gradient(135deg, #22d3ee 0%, #06b6d4 100%);
  --gradient-glow: radial-gradient(circle, rgba(6, 182, 212, 0.2) 0%, rgba(99, 102, 241, 0.08) 50%, transparent 70%);
  --gradient-badge: linear-gradient(135deg, rgba(6, 182, 212, 0.15) 0%, rgba(99, 102, 241, 0.15) 100%);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px -4px rgba(0, 0, 0, 0.7), 0 4px 20px -2px rgba(6, 182, 212, 0.2);
  --shadow-neon-cyan: 0 0 25px rgba(6, 182, 212, 0.45);
  --shadow-neon-purple: 0 0 25px rgba(139, 92, 246, 0.4);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --container-max: 1200px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 深空背景 + 赛博科技点阵微网格 (Cyber Grid) */
body {
  overflow-x: hidden;
  position: relative;
  background-color: var(--bg-primary);
  background-image: 
    linear-gradient(rgba(6, 182, 212, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6, 182, 212, 0.035) 1px, transparent 1px),
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(6, 182, 212, 0.18), transparent);
  background-size: 42px 42px, 42px 42px, 100% 100%;
  min-height: 100vh;
}

/* 深空极光环境光晕 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1100px;
  height: 650px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.14) 0%, rgba(6, 182, 212, 0.08) 35%, rgba(139, 92, 246, 0.04) 60%, transparent 75%);
  pointer-events: none;
  z-index: 0;
}

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

ul {
  list-style: none;
}

img, svg {
  display: block;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

/* 渐变文字 + 赛博微光晕 */
.gradient-text {
  background: linear-gradient(135deg, #22d3ee 0%, #38bdf8 45%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  filter: drop-shadow(0 0 16px rgba(6, 182, 212, 0.35));
}

/* ==========================================================================
   导航栏 (Navbar)
   ========================================================================== */
.navbar-wrapper {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(6, 9, 17, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(6, 182, 212, 0.15);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
  transition: var(--transition-normal);
}

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

/* 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-main);
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.brand-logo:hover {
  transform: scale(1.02);
}

.brand-icon-box {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 18px rgba(6, 182, 212, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

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

/* 导航链接 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition-fast);
  padding: 6px 0;
  position: relative;
}

.nav-link:hover {
  color: #38bdf8;
  text-shadow: 0 0 10px rgba(56, 189, 248, 0.5);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--neon-cyan);
  box-shadow: 0 0 8px var(--neon-cyan);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

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

/* 导航右侧按钮组 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 汉堡按钮 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-main);
}

.menu-toggle svg {
  width: 26px;
  height: 26px;
  stroke: currentColor;
}

/* ==========================================================================
   通用按钮体系 (赛博霓虹动效)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.88rem;
}

.btn-lg {
  padding: 14px 34px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

/* 主按钮：赛博霓虹扫光 (Shimmer Beam) */
.btn-primary {
  background: linear-gradient(135deg, #06b6d4 0%, #2563eb 50%, #6366f1 100%);
  color: #ffffff;
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(60deg, transparent 30%, rgba(255, 255, 255, 0.25) 50%, transparent 70%);
  transform: rotate(25deg) translateX(-120%);
  transition: transform 0.6s ease;
}

.btn-primary:hover::after {
  transform: rotate(25deg) translateX(120%);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 35px rgba(6, 182, 212, 0.65), 0 0 15px rgba(99, 102, 241, 0.5);
  filter: brightness(1.1);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  background: rgba(6, 182, 212, 0.1);
  border-color: var(--neon-cyan);
  color: #ffffff;
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.3);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.06);
}

/* 博客次按钮：电光紫深空霓虹 */
.btn-blog {
  background: rgba(99, 102, 241, 0.1);
  color: #c7d2fe;
  border: 1px solid rgba(129, 140, 248, 0.4);
  box-shadow: 0 0 18px rgba(99, 102, 241, 0.2);
}

.btn-blog:hover {
  background: rgba(99, 102, 241, 0.22);
  border-color: #a5b4fc;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(139, 92, 246, 0.55);
}

/* ==========================================================================
   首屏横幅区 (Hero Section)
   ========================================================================== */
.hero-section {
  padding: 85px 0 65px;
  text-align: center;
  position: relative;
}

/* 赛博能量微光打折标签 */
.discount-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15) 0%, rgba(99, 102, 241, 0.15) 100%);
  border: 1px solid rgba(6, 182, 212, 0.45);
  padding: 7px 22px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  color: #38bdf8;
  margin-bottom: 28px;
  box-shadow: 0 0 22px rgba(6, 182, 212, 0.3), inset 0 0 12px rgba(6, 182, 212, 0.15);
  animation: cyber-neon-pulse 3s infinite alternate ease-in-out;
}

@keyframes cyber-neon-pulse {
  0% {
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.25), inset 0 0 6px rgba(6, 182, 212, 0.1);
    border-color: rgba(6, 182, 212, 0.35);
  }
  100% {
    box-shadow: 0 0 32px rgba(6, 182, 212, 0.6), inset 0 0 16px rgba(6, 182, 212, 0.3);
    border-color: rgba(56, 189, 248, 0.85);
  }
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -1.2px;
  margin-bottom: 24px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  text-shadow: 0 0 40px rgba(0, 0, 0, 0.8);
}

.hero-desc {
  font-size: 1.18rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 36px;
  line-height: 1.75;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

/* 赛博网格数据指标框 */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
  padding: 26px;
  background: rgba(13, 20, 34, 0.8);
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.metric-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
}

.metric-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -10px;
  top: 15%;
  height: 70%;
  width: 1px;
  background: rgba(255, 255, 255, 0.08);
}

.metric-value {
  font-size: 1.95rem;
  font-weight: 800;
  color: #ffffff;
}

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

/* ==========================================================================
   区块通用标题
   ========================================================================== */
.section-padding {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   核心优势图卡区 (Dynamic Cards Section)
   ========================================================================== */
.features-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 36px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-brand);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-lg);
}

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

.card-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--accent-cyan);
}

.card-icon svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: #ffffff;
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 流媒体与 AI 支持图卡 */
.streaming-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.media-card {
  background: linear-gradient(145deg, rgba(19, 27, 43, 0.8) 0%, rgba(13, 19, 31, 0.95) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: all var(--transition-normal);
  position: relative;
}

.media-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.media-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.media-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-streaming {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #ef4444;
}

.icon-ai {
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.25);
  color: #10b981;
}

.media-icon svg {
  width: 26px;
  height: 26px;
  fill: currentColor;
}

.badge-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.pill {
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-main);
}

.pill-highlight {
  background: rgba(6, 182, 212, 0.15);
  border-color: rgba(6, 182, 212, 0.35);
  color: #38bdf8;
}

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

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg);
}

/* 推荐高亮卡片 VIP2 (赛博双层霓虹光环) */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(16, 28, 54, 0.9) 0%, rgba(8, 14, 26, 0.95) 100%);
  border: 2px solid var(--neon-cyan);
  box-shadow: 0 0 35px rgba(6, 182, 212, 0.35), inset 0 0 20px rgba(6, 182, 212, 0.12);
  transform: scale(1.03);
  position: relative;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: 0 0 55px rgba(6, 182, 212, 0.6), inset 0 0 30px rgba(6, 182, 212, 0.2);
  border-color: #38bdf8;
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-brand);
  color: #ffffff;
  padding: 4px 20px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  box-shadow: 0 0 18px rgba(6, 182, 212, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.plan-name {
  font-size: 1.45rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

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

.price-amount {
  font-size: 3.2rem;
  font-weight: 900;
  letter-spacing: -1px;
  color: #ffffff;
}

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

.plan-traffic-highlight {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  color: #38bdf8;
  margin-bottom: 24px;
  font-size: 0.95rem;
}

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

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

.feature-check {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-check svg {
  width: 12px;
  height: 12px;
  fill: currentColor;
}

/* ==========================================================================
   深度特性解析区 (Why Choose Section)
   ========================================================================== */
.why-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

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

.why-content h3 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
}

.why-content p {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.feature-bullets {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.bullet-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.96rem;
  color: var(--text-main);
}

.bullet-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  margin-top: 8px;
  flex-shrink: 0;
  box-shadow: 0 0 10px var(--accent-cyan);
}

/* 动态数据面板 */
.dashboard-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
  backdrop-filter: blur(16px);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.panel-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--accent-emerald);
  font-weight: 600;
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.7; }
}

.panel-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.stat-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
}

.stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 4px;
}

.stat-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 终端代码块效果 (赛博 CRT 扫描线与霓虹光标) */
.terminal-card {
  background: #03060b;
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), 0 0 30px rgba(6, 182, 212, 0.15);
  overflow: hidden;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  position: relative;
}

/* 赛博 CRT 细线扫描微质感 */
.terminal-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.18),
    rgba(0, 0, 0, 0.18) 1px,
    transparent 1px,
    transparent 2px
  );
  pointer-events: none;
  opacity: 0.6;
}

.terminal-header {
  background: #0a101b;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

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

.t-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  box-shadow: 0 0 6px currentColor;
}

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

.terminal-title {
  margin-left: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.terminal-body {
  padding: 24px;
  font-size: 0.88rem;
  line-height: 1.75;
  color: #e2e8f0;
  position: relative;
  z-index: 1;
}

.code-comment { color: #64748b; }
.code-cmd { color: #38bdf8; font-weight: 600; text-shadow: 0 0 8px rgba(56, 189, 248, 0.35); }
.code-str { color: #a7f3d0; }
.code-flag { color: #f472b6; }
.code-success { color: #4ade80; font-weight: bold; text-shadow: 0 0 10px rgba(74, 222, 128, 0.4); }

.terminal-cursor {
  display: inline-block;
  color: #4ade80;
  font-weight: bold;
  animation: blink-cursor 1s infinite steps(2, start);
}

@keyframes blink-cursor {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

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

.marquee-container {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: marquee-scroll 45s linear infinite;
  padding: 16px 0;
}

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

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

.testimonial-card {
  width: 360px;
  flex-shrink: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px;
  backdrop-filter: blur(8px);
  transition: all var(--transition-fast);
}

.testimonial-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.t-rating {
  color: #f59e0b;
  font-size: 1rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.t-quote {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
}

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

.t-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;
}

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

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

/* ==========================================================================
   常见问题解答区 (FAQ Section)
   ========================================================================== */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

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

.faq-item[open] {
  border-color: rgba(6, 182, 212, 0.4);
  background: var(--bg-card-hover);
}

.faq-summary {
  padding: 22px 26px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.05rem;
  font-weight: 600;
  color: #ffffff;
  list-style: none;
  user-select: none;
}

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

.faq-arrow {
  width: 20px;
  height: 20px;
  stroke: var(--accent-cyan);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
  margin-left: 16px;
}

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

.faq-answer {
  padding: 0 26px 24px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px solid transparent;
}

.faq-item[open] .faq-answer {
  border-top-color: var(--border-subtle);
  padding-top: 16px;
}

/* ==========================================================================
   底部转化区 (CTA Section)
   ========================================================================== */
.cta-box {
  background: linear-gradient(135deg, rgba(14, 28, 54, 0.9) 0%, rgba(20, 36, 68, 0.85) 100%);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-lg);
  padding: 64px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 50px rgba(6, 182, 212, 0.18);
}

.cta-box::before {
  content: "";
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.cta-title {
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.cta-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

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

.cta-guarantee-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  margin-top: 32px;
  flex-wrap: wrap;
}

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

.cta-guarantee-item svg {
  width: 16px;
  height: 16px;
  fill: var(--accent-cyan);
}

/* ==========================================================================
   页脚 (Footer)
   ========================================================================== */
.site-footer {
  background: #05070c;
  border-top: 1px solid var(--border-subtle);
  padding: 50px 0 36px;
  text-align: center;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition-fast);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.footer-link:hover {
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.08);
}

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

/* ==========================================================================
   响应式适配 (Responsive Media Queries)
   ========================================================================== */
@media (max-width: 1024px) {
  .features-grid-3,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }

  .why-row {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

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

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

  .features-grid-3,
  .streaming-ai-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

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

  .cta-title {
    font-size: 2rem;
  }

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

  .footer-nav {
    gap: 20px;
  }

  /* 汉堡菜单展开逻辑 */
  .menu-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(8, 12, 20, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-actions {
    display: none;
  }

  .nav-links.active .mobile-actions {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 12px;
    margin-top: 10px;
    padding-top: 16px;
    border-top: 1px solid var(--border-subtle);
  }

  .mobile-actions .btn {
    width: 100%;
  }
}


/* ==========================================================================
   独立子页面样式 (About / Terms / Privacy / Sitemap)
   ========================================================================== */
.subpage-wrapper {
  padding: 60px 0 100px;
}

.subpage-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px;
}

.subpage-title {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.subpage-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
}

.article-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 48px;
  backdrop-filter: blur(16px);
  max-width: 900px;
  margin: 0 auto;
  box-shadow: var(--shadow-lg);
}

.article-section {
  margin-bottom: 40px;
}

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

.article-section h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-section h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 22px;
  background: var(--accent-cyan);
  border-radius: 2px;
}

.article-section h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: #e2e8f0;
  margin: 20px 0 10px;
}

.article-section p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.article-section ul {
  list-style: disc;
  padding-left: 24px;
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

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

.notice-box {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 20px 0;
}

.notice-box.safe {
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.25);
}

.notice-box p {
  color: #fca5a5;
  margin: 0;
  font-size: 0.95rem;
}

.notice-box.safe p {
  color: #6ee7b7;
}

/* 网站地图网格 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.sitemap-group {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
}

.sitemap-group h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.sitemap-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sitemap-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.sitemap-link::before {
  content: "→";
  color: var(--accent-cyan);
}

@media (max-width: 768px) {
  .subpage-title {
    font-size: 2.1rem;
  }
  .article-box {
    padding: 28px 20px;
  }
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
}


/* ==========================================================================
   推荐资讯与 SEO 深度文章专用样式 (News & Insights)
   ========================================================================== */
.news-header-section {
  padding: 60px 0 40px;
  text-align: center;
  background: radial-gradient(circle at 50% 20%, rgba(6, 182, 212, 0.12) 0%, transparent 60%);
}

.news-toc-nav {
  position: sticky;
  top: 72px;
  z-index: 90;
  background: rgba(8, 12, 20, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 14px 0;
  margin-bottom: 50px;
}

.news-toc-list {
  display: flex;
  align-items: center;
  gap: 12px;
  overflow-x: auto;
  white-space: nowrap;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.news-toc-list::-webkit-scrollbar {
  height: 4px;
}

.news-toc-list::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: 4px;
}

.news-toc-btn {
  display: inline-block;
  font-size: 0.86rem;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.news-toc-btn:hover {
  background: rgba(6, 182, 212, 0.15);
  border-color: var(--accent-cyan);
  color: #ffffff;
}

.news-toc-btn.active {
  background: var(--gradient-brand);
  color: #ffffff;
  border-color: transparent;
}

.article-container {
  display: flex;
  flex-direction: column;
  gap: 70px;
  max-width: 980px;
  margin: 0 auto 100px;
}

.deep-article {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 50px 45px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.deep-article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-brand);
}

.article-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.88rem;
  color: var(--text-dim);
}

.meta-tag {
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.25);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.8rem;
}

.article-main-title {
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.35;
  color: #ffffff;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.article-lead {
  font-size: 1.08rem;
  line-height: 1.8;
  color: #cbd5e1;
  background: rgba(255, 255, 255, 0.03);
  border-left: 4px solid var(--accent-cyan);
  padding: 18px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 36px;
}

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 36px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #38bdf8;
  margin: 24px 0 12px;
}

.article-body p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.article-body ul, .article-body ol {
  padding-left: 24px;
  margin-bottom: 22px;
  color: var(--text-muted);
  line-height: 1.8;
}

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

/* 强调外链与内链高亮 */
.seo-link {
  color: var(--accent-cyan);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: all var(--transition-fast);
}

.seo-link:hover {
  color: #38bdf8;
  text-shadow: 0 0 10px rgba(56, 189, 248, 0.5);
}

.seo-table-wrap {
  overflow-x: auto;
  margin: 28px 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

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

.seo-table th {
  background: rgba(19, 27, 43, 0.95);
  color: #f8fafc;
  font-weight: 700;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
}

.seo-table td {
  padding: 14px 18px;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.seo-table tr:last-child td {
  border-bottom: none;
}

.seo-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.article-footer-cta {
  margin-top: 40px;
  padding: 24px;
  background: rgba(6, 182, 212, 0.06);
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.article-footer-cta p {
  margin: 0;
  font-size: 0.95rem;
  color: #e2e8f0;
}

@media (max-width: 768px) {
  .deep-article {
    padding: 30px 20px;
  }
  .article-main-title {
    font-size: 1.6rem;
  }
  .article-body h2 {
    font-size: 1.3rem;
  }
  .article-footer-cta {
    flex-direction: column;
    align-items: flex-start;
  }
}