/* ==========================================================================
   云上极速 (Cloud Velocity) - 赛博朋克极速网络加速落地页样式表
   High-Energy Cyberpunk Design System: Neon Magenta & Cyan on Pure Black
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500;700;800;900&family=Rajdhani:wght@500;600;700&display=swap');

:root {
  --bg-pure: #030308;
  --bg-card: rgba(12, 12, 24, 0.85);
  --bg-card-hover: rgba(20, 20, 38, 0.95);
  --neon-cyan: #00f0ff;
  --neon-magenta: #ff007f;
  --neon-purple: #9d00ff;
  --neon-green: #00ffa3;
  --text-white: #ffffff;
  --text-dim: #9aa5b8;
  --text-muted: #64748b;
  --border-neon: rgba(0, 240, 255, 0.25);
  --border-glow: 0 0 15px rgba(0, 240, 255, 0.35), inset 0 0 12px rgba(255, 0, 127, 0.2);
  --font-cyber: 'Orbitron', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: 'Rajdhani', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --transition-fast: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-pure);
  color: var(--text-white);
  font-family: var(--font-body);
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  background: var(--bg-pure);
  position: relative;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ==========================================================================
   动态背景：透视赛博网格与鼠标跟随光晕
   ========================================================================== */
.cyber-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

/* 动态透视网格地面 */
.cyber-grid {
  position: absolute;
  width: 200%;
  height: 100%;
  left: -50%;
  bottom: 0;
  background-image: 
    linear-gradient(to right, rgba(0, 240, 255, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 0, 127, 0.08) 1px, transparent 1px);
  background-size: 50px 50px;
  transform: perspective(600px) rotateX(65deg) translateY(60px);
  transform-origin: bottom center;
  animation: gridScroll 18s linear infinite;
  mask-image: linear-gradient(to top, rgba(0,0,0,1) 15%, transparent 90%);
  -webkit-mask-image: linear-gradient(to top, rgba(0,0,0,1) 15%, transparent 90%);
}

@keyframes gridScroll {
  0% { transform: perspective(600px) rotateX(65deg) translateY(0); }
  100% { transform: perspective(600px) rotateX(65deg) translateY(50px); }
}

/* 交互鼠标跟随聚光灯 */
.mouse-glow {
  position: fixed;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.12) 0%, rgba(255, 0, 127, 0.06) 45%, transparent 75%);
  transform: translate(-50%, -50%);
  transition: width 0.3s ease, height 0.3s ease;
  z-index: 1;
}

/* 浮动粒子画布 */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.site-wrapper {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   排版与文字故障 (Glitch) 特效
   ========================================================================== */
h1, h2, h3, h4, .brand-font {
  font-family: var(--font-cyber);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.neon-text-cyan {
  color: var(--neon-cyan);
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.6), 0 0 25px rgba(0, 240, 255, 0.3);
}

.neon-text-magenta {
  color: var(--neon-magenta);
  text-shadow: 0 0 10px rgba(255, 0, 127, 0.6), 0 0 25px rgba(255, 0, 127, 0.3);
}

.gradient-title {
  background: linear-gradient(135deg, #ffffff 15%, var(--neon-cyan) 60%, var(--neon-magenta) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* 故障文字效果 */
.glitch-hover {
  position: relative;
  display: inline-block;
  cursor: pointer;
}

.glitch-hover:hover::before,
.glitch-hover:hover::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  clip-path: polygon(0 0, 100% 0, 100% 45%, 0 45%);
}

.glitch-hover:hover::before {
  left: -2px;
  text-shadow: -2px 0 var(--neon-magenta);
  animation: glitch-anim-1 0.4s infinite linear alternate-reverse;
}

.glitch-hover:hover::after {
  left: 2px;
  text-shadow: 2px 0 var(--neon-cyan);
  clip-path: polygon(0 55%, 100% 55%, 100% 100%, 0 100%);
  animation: glitch-anim-2 0.35s infinite linear alternate-reverse;
}

@keyframes glitch-anim-1 {
  0% { transform: translate(0); }
  25% { transform: translate(-3px, 1px); }
  50% { transform: translate(2px, -2px); }
  75% { transform: translate(-1px, 2px); }
  100% { transform: translate(3px, -1px); }
}

@keyframes glitch-anim-2 {
  0% { transform: translate(0); }
  25% { transform: translate(3px, -1px); }
  50% { transform: translate(-2px, 2px); }
  75% { transform: translate(2px, -1px); }
  100% { transform: translate(-3px, 1px); }
}

/* ==========================================================================
   导航栏 Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  background: rgba(3, 3, 8, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0, 240, 255, 0.2);
  z-index: 100;
  transition: var(--transition-fast);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-badge {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--neon-magenta), var(--neon-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
  font-family: var(--font-cyber);
  font-weight: 900;
  font-size: 20px;
  color: #fff;
}

.logo-text {
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 1.5px;
}

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

.nav-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: var(--transition-fast);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--neon-cyan);
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta));
  transition: width 0.3s ease;
}

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

.nav-badge-hot {
  background: var(--neon-magenta);
  color: #fff;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 4px;
  text-shadow: none;
  box-shadow: 0 0 8px rgba(255, 0, 127, 0.6);
}

.nav-cta {
  display: flex;
  align-items: center;
}

/* 移动端菜单按钮 */
.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font-cyber);
  font-size: 14px;
}

/* ==========================================================================
   按钮系统：电弧脉冲与霓虹光效
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-cyber);
  font-weight: 700;
  text-decoration: none;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  overflow: hidden;
}

/* 主行动脉冲按钮 (Electric Pulsing CTA) */
.btn-electric-pulse {
  background: linear-gradient(135deg, var(--neon-magenta) 0%, #a000ff 50%, var(--neon-cyan) 100%);
  background-size: 200% 200%;
  color: #ffffff;
  padding: 16px 36px;
  font-size: 18px;
  border: none;
  box-shadow: 0 0 20px rgba(255, 0, 127, 0.5), 0 0 40px rgba(0, 240, 255, 0.3);
  animation: electricPulse 3s infinite ease-in-out, gradientShift 6s ease infinite;
}

@keyframes electricPulse {
  0% {
    box-shadow: 0 0 15px rgba(255, 0, 127, 0.4), 0 0 30px rgba(0, 240, 255, 0.3);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 35px rgba(255, 0, 127, 0.8), 0 0 60px rgba(0, 240, 255, 0.6), inset 0 0 15px rgba(255, 255, 255, 0.4);
    transform: scale(1.03);
  }
  100% {
    box-shadow: 0 0 15px rgba(255, 0, 127, 0.4), 0 0 30px rgba(0, 240, 255, 0.3);
    transform: scale(1);
  }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.btn-electric-pulse:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 0 45px rgba(255, 0, 127, 1), 0 0 75px rgba(0, 240, 255, 0.8);
}

/* 博客外链 Dofollow 按钮 (Hero专区) */
.btn-dofollow-blog {
  background: rgba(10, 14, 28, 0.8);
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
  padding: 16px 32px;
  font-size: 17px;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.25), inset 0 0 10px rgba(0, 240, 255, 0.1);
}

.btn-dofollow-blog:hover {
  background: rgba(0, 240, 255, 0.15);
  color: #fff;
  border-color: #ffffff;
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.6), inset 0 0 20px rgba(0, 240, 255, 0.3);
  transform: translateY(-3px);
}

/* 价格卡片CTA按钮 */
.btn-pricing {
  width: 100%;
  padding: 14px 24px;
  font-size: 16px;
  background: transparent;
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
}

.btn-pricing:hover {
  background: var(--neon-cyan);
  color: #030308;
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
  transform: translateY(-2px);
}

.btn-pricing-featured {
  background: linear-gradient(135deg, var(--neon-magenta), var(--neon-purple));
  border: 1px solid var(--neon-magenta);
  color: #ffffff;
  box-shadow: 0 0 20px rgba(255, 0, 127, 0.4);
}

.btn-pricing-featured:hover {
  background: linear-gradient(135deg, #ff1a8c, #ad1aff);
  box-shadow: 0 0 35px rgba(255, 0, 127, 0.8);
  transform: translateY(-2px);
}

/* ==========================================================================
   Hero 主视觉区
   ========================================================================== */
.hero-section {
  padding: 85px 0 60px 0;
  text-align: center;
  position: relative;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.4);
  border-radius: 30px;
  font-family: var(--font-cyber);
  font-size: 13px;
  color: var(--neon-cyan);
  margin-bottom: 24px;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
}

.hero-tag-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 8px var(--neon-green);
  animation: pulseDot 1.8s infinite;
}

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

.hero-title {
  font-size: clamp(34px, 5.5vw, 64px);
  line-height: 1.15;
  font-weight: 900;
  margin-bottom: 24px;
}

.hero-subtitle {
  max-width: 820px;
  margin: 0 auto 36px auto;
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-dim);
  font-weight: 500;
  line-height: 1.7;
}

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

/* 核心指标条 (Stats Bar) */
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px;
  background: rgba(10, 10, 22, 0.6);
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 12px;
  backdrop-filter: blur(8px);
}

.stat-item {
  text-align: center;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-item:last-child {
  border-right: none;
}

.stat-num {
  font-family: var(--font-cyber);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  color: var(--neon-cyan);
  text-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
}

.stat-label {
  font-size: 14px;
  color: var(--text-dim);
  margin-top: 4px;
}

/* ==========================================================================
   通配板块与卡片滚动显现效果 (Scroll Reveal)
   ========================================================================== */
.section-block {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 54px;
}

.section-label {
  font-family: var(--font-cyber);
  color: var(--neon-magenta);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 8px;
  text-shadow: 0 0 8px rgba(255, 0, 127, 0.5);
}

.section-title {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 800;
  color: #ffffff;
}

.section-desc {
  max-width: 650px;
  margin: 12px auto 0 auto;
  color: var(--text-dim);
  font-size: 16px;
}

/* 霓虹滚动显现卡片 */
.reveal-card {
  opacity: 0;
  transform: translateY(35px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  background: var(--bg-card);
  border: 1px solid var(--border-neon);
  border-radius: 14px;
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.reveal-card.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--neon-cyan);
  box-shadow: var(--border-glow);
  transform: translateY(-6px);
}

.reveal-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), var(--neon-magenta), transparent);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

.reveal-card:hover::before {
  transform: scaleX(1);
}

/* ==========================================================================
   产品核心优势：3个图文卡片
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-icon-box {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--neon-cyan);
  box-shadow: 0 0 18px rgba(0, 240, 255, 0.25);
  transition: var(--transition-fast);
}

.reveal-card:hover .feature-icon-box {
  transform: rotate(6deg) scale(1.08);
  background: rgba(255, 0, 127, 0.15);
  border-color: var(--neon-magenta);
  color: var(--neon-magenta);
  box-shadow: 0 0 25px rgba(255, 0, 127, 0.4);
}

.feature-icon-box svg {
  width: 32px;
  height: 32px;
  fill: currentColor;
}

.feature-card h3 {
  font-size: 22px;
  margin-bottom: 14px;
  color: #fff;
}

.feature-card p {
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.7;
}

/* ==========================================================================
   流媒体与 AI 支持图卡
   ========================================================================== */
.media-ai-card {
  background: linear-gradient(135deg, rgba(14, 14, 30, 0.85) 0%, rgba(26, 12, 38, 0.85) 100%);
  border: 1px solid rgba(255, 0, 127, 0.3);
  border-radius: 18px;
  padding: 40px;
  box-shadow: 0 0 35px rgba(255, 0, 127, 0.15);
  margin-top: 20px;
}

.media-ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.media-ai-desc h3 {
  font-size: 28px;
  margin-bottom: 16px;
}

.media-ai-desc p {
  color: var(--text-dim);
  font-size: 16px;
  margin-bottom: 24px;
  line-height: 1.7;
}

.service-badges-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.service-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  transition: var(--transition-fast);
}

.service-badge:hover {
  background: rgba(0, 240, 255, 0.15);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
  transform: translateY(-2px);
}

.service-badge.ai-badge:hover {
  background: rgba(255, 0, 127, 0.15);
  border-color: var(--neon-magenta);
  box-shadow: 0 0 15px rgba(255, 0, 127, 0.3);
}

.stream-latency-box {
  background: rgba(5, 5, 14, 0.7);
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: 14px;
  padding: 24px;
}

.stream-latency-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.stream-latency-row:last-child {
  border-bottom: none;
}

.latency-val {
  font-family: var(--font-cyber);
  font-weight: 700;
  color: var(--neon-green);
  text-shadow: 0 0 8px rgba(0, 255, 163, 0.4);
}

/* ==========================================================================
   套餐价格对比表 (Pricing Section)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 14px;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-smooth);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(28, 14, 42, 0.9) 0%, rgba(14, 14, 28, 0.95) 100%);
  border: 2px solid var(--neon-magenta);
  box-shadow: 0 0 35px rgba(255, 0, 127, 0.3), inset 0 0 15px rgba(255, 0, 127, 0.15);
  transform: translateY(-8px);
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--neon-magenta), #9900ff);
  color: #fff;
  padding: 4px 16px;
  border-radius: 20px;
  font-family: var(--font-cyber);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1px;
  box-shadow: 0 0 15px rgba(255, 0, 127, 0.6);
  white-space: nowrap;
}

.plan-name {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 8px;
  color: #fff;
}

.plan-desc {
  font-size: 13px;
  color: var(--text-dim);
  min-height: 38px;
  margin-bottom: 18px;
}

.plan-price-box {
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.plan-currency {
  font-size: 20px;
  color: var(--neon-cyan);
  font-family: var(--font-cyber);
  font-weight: 700;
}

.plan-amount {
  font-size: 42px;
  font-weight: 900;
  font-family: var(--font-cyber);
  color: #fff;
}

.plan-cycle {
  font-size: 14px;
  color: var(--text-muted);
}

.plan-features-list {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-features-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.plan-features-list li svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--neon-cyan);
}

/* ==========================================================================
   用户评价 (Testimonials)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  color: #ffb703;
  margin-bottom: 14px;
  font-size: 16px;
  letter-spacing: 2px;
}

.review-content {
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.review-user-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-magenta));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-cyber);
  font-weight: 800;
  color: #030308;
  font-size: 18px;
}

.user-meta h4 {
  font-size: 15px;
  color: #fff;
  margin-bottom: 2px;
}

.user-meta span {
  font-size: 12px;
  color: var(--text-muted);
}

/* ==========================================================================
   常见问题解答 (FAQ)
   ========================================================================== */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(0, 240, 255, 0.15);
  border-radius: 10px;
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition-fast);
}

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

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 20px 24px;
  color: #fff;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-toggle-icon {
  font-family: var(--font-cyber);
  font-size: 20px;
  color: var(--neon-cyan);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(45deg);
  color: var(--neon-magenta);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  padding: 0 24px;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 350px;
  padding: 0 24px 20px 24px;
}

/* ==========================================================================
   页脚 Footer：仅保留4个核心独立页面标题
   ========================================================================== */
.site-footer {
  background: #020205;
  border-top: 1px solid rgba(0, 240, 255, 0.2);
  padding: 60px 0 35px 0;
  margin-top: 80px;
  position: relative;
  z-index: 10;
}

.footer-nav-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.footer-brand {
  margin-bottom: 24px;
}

.footer-nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  list-style: none;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.footer-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 16px;
  font-weight: 700;
  font-family: var(--font-cyber);
  letter-spacing: 1px;
  padding: 6px 14px;
  border: 1px solid transparent;
  border-radius: 6px;
  transition: var(--transition-fast);
}

.footer-link:hover {
  color: var(--neon-cyan);
  border-color: rgba(0, 240, 255, 0.4);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.25);
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
}

.footer-copyright {
  color: var(--text-muted);
  font-size: 13px;
  letter-spacing: 0.5px;
}

/* ==========================================================================
   单页布局样式 (关于我们、服务条款、隐私政策、资讯页)
   ========================================================================== */
.subpage-container {
  max-width: 920px;
  margin: 40px auto 80px auto;
  background: var(--bg-card);
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: 16px;
  padding: 45px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.7);
}

.subpage-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 24px;
  margin-bottom: 36px;
}

.subpage-header h1 {
  font-size: clamp(26px, 4vw, 36px);
  margin-bottom: 10px;
}

.subpage-header p {
  color: var(--text-dim);
}

.legal-section {
  margin-bottom: 36px;
}

.legal-section h2 {
  font-size: 20px;
  color: var(--neon-cyan);
  margin-bottom: 14px;
}

.legal-section p, .legal-section li {
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 12px;
}

.legal-section ul {
  padding-left: 20px;
}

.legal-highlight {
  background: rgba(255, 0, 127, 0.08);
  border-left: 4px solid var(--neon-magenta);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 20px 0;
  color: #fff;
}

/* 资讯与SEO文章板块 */
.articles-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.article-card {
  background: rgba(14, 14, 28, 0.7);
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 12px;
  padding: 30px;
  transition: var(--transition-fast);
}

.article-card:hover {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.25);
  transform: translateY(-3px);
}

.article-meta {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-tag {
  color: var(--neon-cyan);
  font-weight: 700;
}

.article-card h2 {
  font-size: 22px;
  margin-bottom: 14px;
  color: #fff;
}

.article-body {
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.85;
}

.article-body p {
  margin-bottom: 14px;
}

.article-body a {
  color: var(--neon-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
  font-weight: 700;
  transition: var(--transition-fast);
}

.article-body a:hover {
  color: var(--neon-magenta);
  text-shadow: 0 0 8px rgba(255, 0, 127, 0.6);
}

/* ==========================================================================
   响应式设计与媒体查询 (@media) - 确保手机端完美单栏与大点击区
   ========================================================================== */
@media screen and (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .media-ai-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media screen and (max-width: 768px) {
  .site-header {
    height: auto;
  }
  .header-container {
    height: 68px;
    padding: 0 16px;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(5, 5, 12, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-neon);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
  }
  .nav-menu.open {
    display: flex;
  }
  .nav-cta {
    display: none;
  }
  .hero-section {
    padding: 45px 0 35px 0;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 16px;
  }
  .btn-electric-pulse, .btn-dofollow-blog {
    width: 100%;
    min-height: 52px;
    font-size: 16px;
    padding: 14px 20px;
  }
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    padding: 16px;
  }
  .stat-item:nth-child(2) {
    border-right: none;
  }
  .stat-item {
    padding: 8px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card.featured {
    transform: none;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .footer-nav-list {
    flex-direction: column;
    gap: 16px;
  }
  .subpage-container {
    padding: 24px 18px;
    margin: 20px auto 40px auto;
  }
}