/* ===================================================================
   良心云 (LiangXin Cloud) - 霓虹紫电 (Neon Purple Lightning) 主题样式
   纯原生 CSS，无任何外部重型框架，极速秒开体验
=================================================================== */

:root {
  /* 基础暗黑紫电色板 */
  --bg-deep: #06030b;
  --bg-darker: #040208;
  --bg-card: rgba(18, 10, 34, 0.78);
  --bg-card-hover: rgba(30, 16, 56, 0.92);
  --bg-card-active: rgba(43, 23, 82, 0.95);
  
  /* 霓虹紫电高光色 */
  --neon-purple: #a855f7;
  --neon-electric: #c084fc;
  --neon-violet: #8b5cf6;
  --neon-pink: #f43f5e;
  --neon-cyan: #38bdf8;
  --neon-glow: rgba(168, 85, 247, 0.45);
  --neon-glow-strong: rgba(192, 132, 252, 0.85);
  --neon-cyan-glow: rgba(56, 189, 248, 0.5);
  
  /* 文本色 */
  --text-pure: #ffffff;
  --text-main: #f1f5f9;
  --text-sub: #cbd5e1;
  --text-muted: #94a3b8;
  --text-accent: #e9d5ff;

  /* 边框与阴影 */
  --border-neon: rgba(168, 85, 247, 0.28);
  --border-neon-bright: rgba(192, 132, 252, 0.7);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.7), 0 0 20px rgba(168, 85, 247, 0.15);
  --shadow-hover: 0 15px 40px -5px rgba(0, 0, 0, 0.8), 0 0 35px rgba(168, 85, 247, 0.4);
  --shadow-btn: 0 0 25px rgba(168, 85, 247, 0.6), inset 0 0 12px rgba(255, 255, 255, 0.25);
  
  /* 字体与过渡 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  background: 
    radial-gradient(circle at 50% 0%, rgba(147, 51, 234, 0.26) 0%, transparent 60%),
    radial-gradient(circle at 10% 30%, rgba(168, 85, 247, 0.15) 0%, transparent 45%),
    radial-gradient(circle at 90% 70%, rgba(56, 189, 248, 0.14) 0%, transparent 50%),
    var(--bg-deep);
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* 霓虹闪电背景网格 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(rgba(168, 85, 247, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 85, 247, 0.05) 1px, transparent 1px);
  background-size: 45px 45px;
  pointer-events: none;
  z-index: 0;
}

/* 页面通用容器 */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* 章节通用样式 */
.section {
  padding: 96px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: rgba(168, 85, 247, 0.14);
  border: 1px solid var(--border-neon);
  color: var(--neon-electric);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 16px;
  box-shadow: 0 0 15px rgba(168, 85, 247, 0.25);
}

.section-title {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--text-pure);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  line-height: 1.25;
}

.section-title .text-gradient {
  background: linear-gradient(135deg, #ffffff 10%, #c084fc 60%, #e879f9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 25px rgba(168, 85, 247, 0.35);
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===================================================================
   顶部导航栏 (Navbar 带目录导航)
=================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 74px;
  background: rgba(7, 3, 14, 0.86);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-neon);
  z-index: 900;
  display: flex;
  align-items: center;
}

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

/* 可交互的 Logo (点击回顶端) */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  cursor: pointer;
  background: none;
  border: none;
  padding: 6px 10px;
  border-radius: var(--radius-md);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.brand-logo:hover {
  background: rgba(168, 85, 247, 0.12);
  transform: translateY(-1px);
}

.brand-logo:active {
  transform: scale(0.96);
}

.logo-icon-box {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, #6b21a8, #a855f7 50%, #38bdf8);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 18px rgba(168, 85, 247, 0.7);
  position: relative;
  transition: var(--transition);
}

.brand-logo:hover .logo-icon-box {
  box-shadow: 0 0 28px rgba(192, 132, 252, 0.95), 0 0 12px #38bdf8;
  transform: rotate(6deg) scale(1.08);
}

.logo-svg {
  width: 24px;
  height: 24px;
  fill: #ffffff;
  filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.9));
}

.brand-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-pure);
  letter-spacing: 0.5px;
  line-height: 1.1;
  background: linear-gradient(90deg, #ffffff, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 0.65rem;
  color: var(--neon-cyan);
  letter-spacing: 2px;
  font-weight: 800;
}

/* 页眉中间导航目录菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-menu-link {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  padding: 6px 8px;
  position: relative;
}

.nav-menu-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--neon-electric);
  transition: var(--transition);
  box-shadow: 0 0 8px var(--neon-electric);
}

.nav-menu-link:hover {
  color: #ffffff;
  text-shadow: 0 0 10px rgba(192, 132, 252, 0.8);
}

.nav-menu-link:hover::after {
  width: 80%;
}

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

.nav-link-btn {
  color: var(--neon-cyan);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  transition: var(--transition);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(56, 189, 248, 0.3);
  background: rgba(56, 189, 248, 0.08);
}

.nav-link-btn:hover {
  background: rgba(56, 189, 248, 0.18);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
  color: #ffffff;
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-full);
  padding: 12px 28px;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, #9333ea, #a855f7 50%, #c084fc);
  color: #ffffff;
  box-shadow: var(--shadow-btn);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #a855f7, #c084fc 60%, #e879f9);
  box-shadow: 0 0 35px rgba(192, 132, 252, 0.85), 0 0 15px rgba(56, 189, 248, 0.5);
  transform: translateY(-2px) scale(1.02);
  color: #ffffff;
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

.btn-secondary {
  background: rgba(22, 13, 38, 0.85);
  color: var(--neon-electric);
  border: 1px solid var(--border-neon-bright);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(168, 85, 247, 0.2);
  border-color: var(--neon-electric);
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.4);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.125rem;
}

/* ===================================================================
   主视觉区 (Hero Section 左右分布与动态监控终端)
=================================================================== */
.hero {
  padding-top: 140px;
  padding-bottom: 90px;
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-left {
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  background: rgba(168, 85, 247, 0.14);
  border: 1px solid var(--border-neon-bright);
  color: #e9d5ff;
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: 0 0 25px rgba(168, 85, 247, 0.25);
  animation: pulse-border 2.5s infinite;
}

.hero-badge .ping-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 8px #22c55e;
  position: relative;
}

/* 核心大标题必须包含良心云 */
.hero-headline {
  font-size: 3.3rem;
  font-weight: 900;
  line-height: 1.18;
  margin-bottom: 22px;
  letter-spacing: -0.5px;
}

.brand-highlight {
  color: #ffffff;
  position: relative;
  display: inline-block;
  text-shadow: 0 0 25px rgba(168, 85, 247, 0.8);
}

.brand-highlight::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #a855f7, #38bdf8);
  border-radius: 2px;
  box-shadow: 0 0 10px #38bdf8;
}

.hero-headline .neon-purple-text {
  background: linear-gradient(135deg, #ffffff 15%, #c084fc 65%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 30px rgba(168, 85, 247, 0.3);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 36px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

/* 信任指标徽章 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  padding: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-neon);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-pure);
  background: linear-gradient(135deg, #ffffff, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 2px;
}

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

/* ===================================================================
   主视觉区右侧：动态紫电网络监控终端 (Cyber Network Monitor)
=================================================================== */
.hero-right {
  display: flex;
  justify-content: center;
}

.cyber-terminal {
  width: 100%;
  max-width: 480px;
  background: rgba(14, 8, 26, 0.88);
  border: 1px solid var(--border-neon-bright);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 0 40px rgba(168, 85, 247, 0.28), inset 0 0 20px rgba(168, 85, 247, 0.08);
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.cyber-terminal::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #c084fc, #38bdf8, transparent);
  animation: scanline-top 3s linear infinite;
}

@keyframes scanline-top {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(168, 85, 247, 0.2);
  margin-bottom: 18px;
}

.terminal-controls {
  display: flex;
  gap: 7px;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; box-shadow: 0 0 6px #ef4444; }
.dot-yellow { background: #f59e0b; box-shadow: 0 0 6px #f59e0b; }
.dot-green { background: #10b981; box-shadow: 0 0 6px #10b981; }

.terminal-title {
  font-family: monospace;
  font-size: 0.82rem;
  color: var(--neon-cyan);
  font-weight: 700;
  letter-spacing: 1px;
}

.terminal-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.4);
  color: #4ade80;
  font-size: 0.75rem;
  font-weight: 700;
}

/* 实时专线 Ping 矩阵 */
.node-matrix-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.node-matrix-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(22, 13, 38, 0.6);
  border: 1px solid rgba(168, 85, 247, 0.18);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  transition: var(--transition);
}

.node-matrix-item:hover {
  background: rgba(33, 19, 58, 0.85);
  border-color: var(--neon-electric);
  transform: translateX(4px);
}

.node-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-flag {
  font-size: 1.15rem;
}

.node-name {
  font-size: 0.88rem;
  color: var(--text-pure);
  font-weight: 600;
}

.node-type {
  font-size: 0.72rem;
  color: var(--neon-electric);
  background: rgba(168, 85, 247, 0.12);
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
}

.node-ping-box {
  display: flex;
  align-items: center;
  gap: 8px;
}

.live-pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 8px #22c55e;
  animation: pulse-ping 1.5s infinite;
}

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

.node-ms {
  font-family: monospace;
  font-size: 0.88rem;
  font-weight: 800;
  color: #4ade80;
}

/* 动态带宽波动条 */
.terminal-waveform-box {
  background: rgba(10, 5, 20, 0.75);
  border: 1px solid rgba(168, 85, 247, 0.18);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: 14px;
}

.waveform-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.waveform-bars {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 38px;
}

.wave-bar {
  flex: 1;
  background: linear-gradient(180deg, var(--neon-electric), var(--neon-purple));
  border-radius: 2px;
  animation: wave-anim 1.6s ease-in-out infinite alternate;
}

.wave-bar:nth-child(1) { height: 40%; animation-delay: 0.1s; }
.wave-bar:nth-child(2) { height: 75%; animation-delay: 0.3s; }
.wave-bar:nth-child(3) { height: 95%; animation-delay: 0.15s; }
.wave-bar:nth-child(4) { height: 60%; animation-delay: 0.4s; }
.wave-bar:nth-child(5) { height: 85%; animation-delay: 0.2s; }
.wave-bar:nth-child(6) { height: 100%; animation-delay: 0.5s; }
.wave-bar:nth-child(7) { height: 50%; animation-delay: 0.35s; }
.wave-bar:nth-child(8) { height: 90%; animation-delay: 0.25s; }
.wave-bar:nth-child(9) { height: 70%; animation-delay: 0.45s; }
.wave-bar:nth-child(10) { height: 85%; animation-delay: 0.1s; }
.wave-bar:nth-child(11) { height: 65%; animation-delay: 0.3s; }
.wave-bar:nth-child(12) { height: 95%; animation-delay: 0.2s; }

@keyframes wave-anim {
  0% { transform: scaleY(0.4); }
  100% { transform: scaleY(1); }
}

.terminal-security-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.74rem;
  color: var(--neon-cyan);
  background: rgba(56, 189, 248, 0.08);
  border: 1px dashed rgba(56, 189, 248, 0.35);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}

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

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

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--neon-electric), #38bdf8, transparent);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-8px);
  background: var(--bg-card-hover);
  border-color: var(--border-neon-bright);
  box-shadow: var(--shadow-hover);
}

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

.feature-icon-wrap {
  width: 68px;
  height: 68px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.22), rgba(56, 189, 248, 0.1));
  border: 1px solid var(--border-neon-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.35);
  transition: var(--transition);
}

.feature-card:hover .feature-icon-wrap {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.4), rgba(56, 189, 248, 0.25));
  border-color: var(--neon-electric);
  box-shadow: 0 0 30px rgba(192, 132, 252, 0.8), 0 0 10px #38bdf8;
  transform: scale(1.1) rotate(4deg);
}

.feature-icon-wrap svg {
  width: 34px;
  height: 34px;
  fill: var(--neon-electric);
  filter: drop-shadow(0 0 6px rgba(192, 132, 252, 0.7));
}

.feature-card h3 {
  font-size: 1.38rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}

.feature-card p {
  color: var(--text-sub);
  font-size: 0.96rem;
  line-height: 1.75;
  margin-bottom: 22px;
  flex-grow: 1;
}

.feature-card .feature-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.feature-tag-list span {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  background: rgba(168, 85, 247, 0.12);
  color: var(--neon-cyan);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

/* ===================================================================
   流媒体与 AI 支持图卡 (全新高精 SVG 官方矢量图标增强)
=================================================================== */
.unlock-wrapper {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.unlock-box {
  background: var(--bg-card);
  border: 1px solid var(--border-neon);
  border-radius: var(--radius-lg);
  padding: 38px 32px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
}

.unlock-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 26px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(168, 85, 247, 0.18);
  flex-wrap: wrap;
  gap: 12px;
}

.unlock-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-pure);
}

.unlock-badge {
  font-size: 0.82rem;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.45);
  color: #4ade80;
  font-weight: 700;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.service-card {
  background: rgba(14, 8, 28, 0.7);
  border: 1px solid rgba(168, 85, 247, 0.2);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card:hover {
  background: rgba(32, 17, 60, 0.9);
  border-color: var(--neon-electric);
  transform: translateY(-4px);
  box-shadow: 0 0 25px rgba(168, 85, 247, 0.4);
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(22, 13, 40, 0.8);
  border: 1px solid rgba(168, 85, 247, 0.3);
  flex-shrink: 0;
  transition: var(--transition);
}

.service-card:hover .service-icon {
  border-color: var(--neon-electric);
  box-shadow: 0 0 15px rgba(192, 132, 252, 0.6);
  transform: scale(1.08);
}

.service-icon svg {
  width: 26px;
  height: 26px;
}

.service-info h4 {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 3px;
}

.service-info p {
  font-size: 0.8rem;
  color: var(--neon-cyan);
}

/* ===================================================================
   清晰的套餐价格对比表 (参考网上主流真实套餐价格)
=================================================================== */
.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-neon);
  border-radius: var(--radius-lg);
  padding: 42px 32px;
  backdrop-filter: blur(14px);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-card);
}

.pricing-card.featured {
  border-color: var(--neon-electric);
  background: rgba(30, 15, 56, 0.9);
  box-shadow: 0 0 40px rgba(168, 85, 247, 0.45);
  transform: scale(1.03);
}

.featured-pill {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #a855f7, #ec4899);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 5px 20px;
  border-radius: var(--radius-full);
  letter-spacing: 1px;
  text-transform: uppercase;
  box-shadow: 0 0 20px rgba(236, 72, 153, 0.7);
}

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

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
}

.pricing-plan-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 8px;
}

.pricing-plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 42px;
  line-height: 1.5;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(168, 85, 247, 0.2);
}

.price-currency {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--neon-electric);
}

.price-amount {
  font-size: 3.4rem;
  font-weight: 900;
  color: var(--text-pure);
  line-height: 1;
}

.price-period {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: 36px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.96rem;
  color: var(--text-sub);
}

.check-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(168, 85, 247, 0.2);
  border: 1px solid var(--neon-electric);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--neon-electric);
  font-size: 0.8rem;
  font-weight: 800;
}

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

/* ===================================================================
   SEO 30 篇技术精选文章图卡板块
=================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-neon);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.article-card.featured-card {
  border-color: var(--neon-electric);
  background: rgba(28, 15, 52, 0.88);
  box-shadow: 0 0 25px rgba(168, 85, 247, 0.35);
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-neon-bright);
  box-shadow: var(--shadow-hover);
}

.article-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.article-badge {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(168, 85, 247, 0.15);
  color: var(--neon-electric);
  font-weight: 700;
  border: 1px solid rgba(168, 85, 247, 0.3);
  font-size: 0.78rem;
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-pure);
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-card-title a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

.article-card-title a:hover {
  color: var(--neon-electric);
  text-shadow: 0 0 10px rgba(192, 132, 252, 0.8);
}

.article-card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid rgba(168, 85, 247, 0.15);
  font-size: 0.85rem;
}

.article-read-link {
  color: var(--neon-cyan);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-read-link:hover {
  color: #ffffff;
  transform: translateX(4px);
  text-shadow: 0 0 8px var(--neon-cyan);
}

.article-card-cta {
  background: rgba(168, 85, 247, 0.18);
  border: 1px solid var(--border-neon);
  color: var(--neon-electric);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.8rem;
  transition: var(--transition);
}

.article-card-cta:hover {
  background: var(--neon-purple);
  color: #ffffff;
  box-shadow: 0 0 15px rgba(192, 132, 252, 0.85);
  transform: scale(1.05);
}

/* ===================================================================
   用户真实口碑 (User Reviews)
=================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-neon);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-neon-bright);
  box-shadow: var(--shadow-hover);
}

.review-stars {
  display: flex;
  gap: 4px;
  color: #fbbf24;
  margin-bottom: 16px;
  font-size: 1.1rem;
}

.review-content {
  font-size: 1rem;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 24px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid rgba(168, 85, 247, 0.15);
  padding-top: 18px;
}

.user-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, #7c3aed, #ec4899);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.15rem;
  color: #ffffff;
  box-shadow: 0 0 12px rgba(168, 85, 247, 0.4);
}

.user-details h5 {
  font-size: 0.98rem;
  color: var(--text-pure);
  font-weight: 700;
}

.user-details span {
  font-size: 0.8rem;
  color: var(--neon-cyan);
}

/* ===================================================================
   常见问题解答 (FAQ)
=================================================================== */
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

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

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

.faq-summary {
  padding: 22px 26px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--text-pure);
  list-style: none;
  user-select: none;
  transition: var(--transition);
}

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

.faq-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(168, 85, 247, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon-electric);
  font-size: 1.15rem;
  transition: var(--transition);
}

.faq-item[open] .faq-icon {
  transform: rotate(45deg);
  background: var(--neon-purple);
  color: #ffffff;
}

.faq-answer {
  padding: 0 26px 22px 26px;
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.75;
}

/* ===================================================================
   底端页脚 (Footer - 高级 SEO 重构增强，兼顾品牌、专线矩阵与权重传递)
=================================================================== */
.site-footer {
  border-top: 1px solid var(--border-neon);
  background: #030106;
  padding: 64px 0 40px 0;
  position: relative;
  z-index: 10;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.1fr;
  gap: 36px;
  margin-bottom: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(168, 85, 247, 0.18);
  text-align: left;
}

.footer-col h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-col h4::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 14px;
  background: var(--neon-electric);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--neon-electric);
}

.footer-brand-title {
  display: flex;
  flex-direction: column;
  margin-bottom: 14px;
}

.footer-brand-title .brand-title {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--text-pure);
  background: linear-gradient(90deg, #ffffff, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-brand-title .brand-subtitle {
  font-size: 0.68rem;
  color: var(--neon-cyan);
  letter-spacing: 2px;
  font-weight: 800;
}

.footer-col-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 18px;
}

.footer-trust-badges {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--neon-cyan);
}

.footer-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-list a {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.88rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-list a:hover {
  color: var(--neon-electric);
  transform: translateX(4px);
  text-shadow: 0 0 8px rgba(192, 132, 252, 0.7);
}

.footer-seo-cluster {
  background: rgba(14, 8, 28, 0.75);
  border: 1px solid rgba(168, 85, 247, 0.2);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin-bottom: 30px;
  text-align: left;
}

.footer-seo-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--neon-electric);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.footer-seo-tags a {
  font-size: 0.8rem;
  color: var(--text-sub);
  text-decoration: none;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  background: rgba(168, 85, 247, 0.08);
  border: 1px solid rgba(168, 85, 247, 0.2);
  transition: var(--transition);
}

.footer-seo-tags a:hover {
  color: #ffffff;
  background: rgba(168, 85, 247, 0.28);
  border-color: var(--neon-electric);
  box-shadow: 0 0 12px rgba(168, 85, 247, 0.45);
}

.footer-core-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 24px;
}

.footer-nav-primary {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-nav-primary .footer-link {
  color: var(--text-pure);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  background: rgba(168, 85, 247, 0.12);
  border: 1px solid rgba(168, 85, 247, 0.3);
  text-decoration: none;
  transition: var(--transition);
}

.footer-nav-primary .footer-link:hover {
  background: var(--neon-purple);
  color: #ffffff;
  box-shadow: 0 0 18px rgba(192, 132, 252, 0.85);
  transform: translateY(-2px);
}

.footer-authority-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #7e22ce, #a855f7 50%, #c084fc);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.92rem;
  text-decoration: none;
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: var(--transition);
}

.footer-authority-cta:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 0 30px rgba(192, 132, 252, 0.9), 0 0 12px #38bdf8;
  color: #ffffff;
}

.footer-bottom-info {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.84rem;
  line-height: 1.85;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-friendlinks {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0;
  font-size: 0.88rem;
}

.footer-friendlinks a {
  transition: var(--transition);
  position: relative;
  display: inline-block;
  padding: 2px 4px;
}

.footer-friendlinks a:hover {
  text-shadow: 0 0 12px rgba(192, 132, 252, 0.95), 0 0 20px rgba(56, 189, 248, 0.7);
  transform: translateY(-1px);
}

/* ===================================================================
   右侧浮动章节导航控制器 (Floating Section Navigator)
=================================================================== */
.section-nav-widget {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  background: rgba(15, 8, 30, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 14px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-neon-bright);
  box-shadow: 0 0 28px rgba(168, 85, 247, 0.4);
  transition: var(--transition);
}

.nav-arrow-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(168, 85, 247, 0.18);
  border: 1px solid var(--border-neon);
  color: var(--neon-electric);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  outline: none;
}

.nav-arrow-btn:hover {
  background: var(--neon-purple);
  color: #ffffff;
  box-shadow: 0 0 22px rgba(192, 132, 252, 0.85);
  transform: scale(1.15);
}

.nav-arrow-btn:active {
  transform: scale(0.92);
}

.nav-arrow-btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.nav-indicators {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 6px 0;
}

.nav-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: var(--transition);
}

.nav-dot:hover {
  background: var(--neon-electric);
  transform: scale(1.4);
}

.nav-dot.active {
  background: var(--neon-electric);
  height: 18px;
  border-radius: 4px;
  box-shadow: 0 0 10px var(--neon-electric);
}

/* 动效 */
@keyframes pulse-border {
  0%, 100% {
    border-color: rgba(168, 85, 247, 0.3);
    box-shadow: 0 0 15px rgba(168, 85, 247, 0.2);
  }
  50% {
    border-color: rgba(192, 132, 252, 0.85);
    box-shadow: 0 0 28px rgba(192, 132, 252, 0.55);
  }
}

.electric-ripple {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(192, 132, 252, 0.6) 0%, transparent 70%);
  pointer-events: none;
  animation: ripple-grow 0.6s ease-out forwards;
}

@keyframes ripple-grow {
  0% { transform: scale(0); opacity: 1; }
  100% { transform: scale(3.5); opacity: 0; }
}

/* ===================================================================
   响应式设计 (Media Queries - 移动端优先适配)
=================================================================== */
@media (max-width: 1024px) {
  .nav-menu {
    display: none; /* 移动端/平板收纳导航文字 */
  }

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

  .hero-left {
    text-align: center;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .features-grid,
  .pricing-grid,
  .reviews-grid,
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-top-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }
  
  .hero-headline {
    font-size: 2.8rem;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 18px;
  }
  
  .section {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .hero {
    padding-top: 100px;
    padding-bottom: 50px;
    min-height: auto;
  }
  
  .hero-headline {
    font-size: 2.2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 28px;
  }
  
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 14px;
  }
  
  .hero-cta-group .btn {
    width: 100%;
    min-height: 50px;
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    padding: 16px;
  }
  
  .features-grid,
  .pricing-grid,
  .reviews-grid,
  .service-grid,
  .articles-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }
  
  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    text-align: center;
  }

  .footer-col h4 {
    justify-content: center;
  }

  .footer-trust-badges {
    align-items: center;
  }

  .footer-seo-cluster {
    text-align: center;
  }

  .footer-seo-tags {
    justify-content: center;
  }

  .footer-core-bar {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

  .footer-nav-primary {
    justify-content: center;
    gap: 10px;
  }

  .footer-nav-primary .footer-link {
    width: 100%;
    text-align: center;
  }

  .footer-authority-cta {
    width: 100%;
    justify-content: center;
  }

  .section-nav-widget {
    right: 12px;
    padding: 8px 6px;
    gap: 8px;
    transform: translateY(-50%) scale(0.9);
  }
  
  .nav-arrow-btn {
    width: 40px;
    height: 40px;
  }
  
  .nav-indicators {
    display: none;
  }
}