/* ==========================================================================
   Web3加速 - 数据中心 + 服务器矩阵 + 工业科技 视觉系统
   主背景: #0A0E1A 深蓝黑 | 主色: #10B981 服务器绿 | 次色: #F59E0B LED 橙
   ========================================================================== */

/* 全局工业科技变量与设计规范 */
:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --bg-dark: #0A0E1A;
  --bg-card: rgba(13, 19, 34, 0.72);
  --bg-card-hover: rgba(18, 27, 48, 0.88);
  --bg-subtle: transparent;
  --bg-server: #0c1222;
  
  --text-main: #f3f7fc;
  --text-muted: #94a3b8;
  --text-light: #8b9bb4;
  
  /* 主题色系 */
  --primary: #10B981;          /* 服务器绿 */
  --primary-deep: #059669;
  --secondary: #F59E0B;        /* LED 橙 */
  --secondary-glow: rgba(245, 158, 11, 0.4);
  
  /* 渐变系统 */
  --gradient-brand: linear-gradient(135deg, #10B981 0%, #F59E0B 100%);
  --gradient-server: linear-gradient(180deg, rgba(16, 185, 129, 0.12) 0%, rgba(10, 14, 26, 0.8) 100%);
  
  /* 边框与辉光 */
  --border-glass: rgba(16, 185, 129, 0.18);
  --border-focus: rgba(16, 185, 129, 0.55);
  --border-rack: rgba(245, 158, 11, 0.25);
  --shadow-glow: 0 0 30px rgba(16, 185, 129, 0.45);
  --shadow-orange: 0 0 25px rgba(245, 158, 11, 0.35);
  
  --radius-sm: 8px;
  --radius-btn: 12px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1240px;
}

/* 无障碍增强：跳过导航链接 */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--primary);
  color: #0A0E1A;
  padding: 10px 18px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  z-index: 9999;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 16px;
  outline: 3px solid #ffffff;
}

/* 键盘焦点指示器 */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

/* 锚点滚动留白，防止固定页眉遮挡标题 */
.section, [id], .seo-article-block {
  scroll-margin-top: 86px;
}

/* 移动端触摸区域规范 (至少 44x44px) */
.btn, .nav-link, .header-cta, .toc-link, .footer-nav a {
  min-height: 44px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

/* 工业数据中心网格背景 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    linear-gradient(to right, rgba(16, 185, 129, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(16, 185, 129, 0.035) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* ==========================================================================
   背景动效：8秒扫描线 + 2大大型呼吸缩放光晕 + 2个固定角等宽读数
   ========================================================================== */

/* 1. 横向绿色扫描线（8秒一周期，纯背景层扫动，不遮挡文字内容） */
.scanline {
  position: fixed;
  top: -10px;
  left: 0;
  width: 100vw;
  height: 2px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(16, 185, 129, 0.35) 15%, 
    #10B981 50%, 
    rgba(16, 185, 129, 0.35) 85%, 
    transparent 100%
  );
  box-shadow: 0 0 16px #10B981, 0 0 32px rgba(16, 185, 129, 0.5);
  pointer-events: none;
  z-index: 1;
  animation: scanline 8s linear infinite;
}

@keyframes scanline {
  0% {
    top: -5px;
    opacity: 0;
  }
  5% {
    opacity: 0.9;
  }
  95% {
    opacity: 0.9;
  }
  100% {
    top: 100vh;
    opacity: 0;
  }
}

/* 2. 大型绿/橙双色呼吸缩放模糊光晕 */
.glow-orb-green {
  position: fixed;
  top: 5%;
  left: -100px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.22) 0%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  animation: orb-breathe-green 10s ease-in-out infinite alternate;
}

.glow-orb-orange {
  position: fixed;
  bottom: 8%;
  right: -80px;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.18) 0%, transparent 70%);
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
  animation: orb-breathe-orange 12s ease-in-out infinite alternate;
}

@keyframes orb-breathe-green {
  0% {
    transform: scale(0.9) translate(0, 0);
    opacity: 0.2;
  }
  50% {
    transform: scale(1.25) translate(40px, 30px);
    opacity: 0.38;
  }
  100% {
    transform: scale(1) translate(-20px, 10px);
    opacity: 0.25;
  }
}

@keyframes orb-breathe-orange {
  0% {
    transform: scale(1) translate(0, 0);
    opacity: 0.18;
  }
  50% {
    transform: scale(1.3) translate(-30px, -40px);
    opacity: 0.35;
  }
  100% {
    transform: scale(0.95) translate(20px, -10px);
    opacity: 0.22;
  }
}

/* 3. 角落固定等宽字体读数 (Monospace Digital Telemetry) */
.telemetry-corner {
  position: fixed;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 1px;
  color: var(--primary);
  background: rgba(10, 14, 26, 0.88);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 5px 12px;
  border-radius: 4px;
  backdrop-filter: blur(8px);
  z-index: 90;
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.15);
}

.telemetry-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 6px var(--primary);
  animation: led-blink 1s ease-in-out infinite;
}

.telemetry-top-left {
  top: 84px;
  left: 20px;
}

.telemetry-bottom-right {
  bottom: 20px;
  right: 20px;
  border-color: rgba(245, 158, 11, 0.35);
  color: var(--secondary);
}

.telemetry-bottom-right .telemetry-dot {
  background: var(--secondary);
  box-shadow: 0 0 6px var(--secondary);
}

/* 通用容器 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 10;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

/* 渐变高亮文字 (绿到橙渐变) */
.text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* ==========================================================================
   CTA 按钮规范：绿到橙渐变，圆角 12px，带 30px 绿色辉光
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 30px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-btn);
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  min-height: 48px;
  text-align: center;
  position: relative;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #040810;
  font-weight: 800;
  border-radius: var(--radius-btn);
  box-shadow: var(--shadow-glow);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 42px rgba(16, 185, 129, 0.7), 0 0 20px rgba(245, 158, 11, 0.5);
  filter: brightness(1.1);
}

.btn-secondary {
  background: rgba(13, 19, 34, 0.7);
  color: var(--text-main);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-btn);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(16, 185, 129, 0.08);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.2);
}

.btn-block {
  width: 100%;
}

/* 头部导航 */
.header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-glass);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: -0.5px;
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--gradient-brand);
  border-radius: 10px;
  color: #040810;
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.4);
}

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

.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 600;
}

.nav-links a:hover {
  color: var(--primary);
  text-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* ==========================================================================
   主视觉区 (Hero)：左侧 H1 Space Grotesk + 右侧 4个 1U 服务器单元垂直堆叠浮动
   ========================================================================== */
.hero {
  padding: 60px 0 70px;
  position: relative;
}

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

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

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 999px;
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-tag-pulse {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--primary);
  animation: led-blink 1.2s infinite;
}

/* H1「web3加速」使用 Space Grotesk 字体 + 绿到橙渐变 */
.hero-title {
  font-family: var(--font-heading);
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1.2px;
  margin-bottom: 22px;
}

.hero-title .brand-name {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
}

.hero-title .sub-title {
  font-size: 2.1rem;
  color: var(--text-main);
  display: block;
  margin-top: 6px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 34px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

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

.stat-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  text-shadow: 0 0 12px rgba(16, 185, 129, 0.4);
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   右侧机柜动画：4 个 1U 服务器单元垂直堆叠（4秒上下浮动一周期 + 节奏脉冲）
   ========================================================================== */
.hero-right {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

/* 整个机柜框架：上下浮动 4 秒一周期 */
.server-rack {
  width: 100%;
  max-width: 480px;
  background: linear-gradient(180deg, #0b1120 0%, #070b14 100%);
  border: 2px solid rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6), 0 0 35px rgba(16, 185, 129, 0.2);
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: rack-float 4s ease-in-out infinite;
  position: relative;
}

@keyframes rack-float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

/* 机柜顶部状态栏 */
.rack-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 8px 8px;
  border-bottom: 1px dashed rgba(16, 185, 129, 0.2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.rack-title {
  color: var(--primary);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 单个 1U 服务器单元 (每个带 3 个 LED 指示灯闪烁、节点标签、负载条，脉冲辉光) */
.server-unit {
  background: var(--bg-server);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  animation: unit-glow-pulse 3s ease-in-out infinite;
}

.server-unit:nth-child(2) { animation-delay: 0.5s; }
.server-unit:nth-child(3) { animation-delay: 1.0s; }
.server-unit:nth-child(4) { animation-delay: 1.5s; }
.server-unit:nth-child(5) { animation-delay: 2.0s; }

@keyframes unit-glow-pulse {
  0%, 100% {
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.22);
  }
  50% {
    box-shadow: 0 0 24px rgba(16, 185, 129, 0.32), inset 0 0 12px rgba(16, 185, 129, 0.08);
    border-color: rgba(16, 185, 129, 0.55);
  }
}

/* 机架挂耳仿真螺丝 */
.rack-ear {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.rack-screw {
  width: 6px;
  height: 6px;
  background: #334155;
  border-radius: 50%;
  border: 1px solid #475569;
}

/* 3 个 LED 指示灯：不同节奏闪烁 */
.server-leds {
  display: flex;
  align-items: center;
  gap: 6px;
}

.led {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.led-green {
  background: #10B981;
  box-shadow: 0 0 8px #10B981;
}

.led-amber {
  background: #F59E0B;
  box-shadow: 0 0 8px #F59E0B;
}

/* 闪烁节奏差 */
.led-fast {
  animation: led-blink 0.75s ease-in-out infinite;
}

.led-med {
  animation: led-blink 1.4s ease-in-out infinite 0.3s;
}

.led-slow {
  animation: led-blink 2.2s ease-in-out infinite 0.7s;
}

@keyframes led-blink {
  0%, 100% {
    opacity: 1;
    filter: brightness(1.2);
  }
  50% {
    opacity: 0.25;
    filter: brightness(0.6);
  }
}

/* 节点信息与实时负载条 */
.server-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.server-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-main);
}

.server-label span.node-code {
  color: var(--primary);
}

.server-label span.load-pct {
  color: var(--secondary);
  font-size: 0.72rem;
}

/* 实时负载条动画 */
.load-bar-wrap {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 99px;
  overflow: hidden;
}

.load-bar-fill {
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, #10B981 0%, #F59E0B 100%);
  position: relative;
  animation: load-pulse 2.8s ease-in-out infinite alternate;
}

@keyframes load-pulse {
  0% { filter: brightness(0.9); }
  100% { filter: brightness(1.3); }
}

/* 节点状态角标 */
.server-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.12);
  color: var(--primary);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* ==========================================================================
   各板块视觉与栅格样式：保持原有栅格布局，融合服务器矩阵科技风
   ========================================================================== */
.section {
  padding: 70px 0;
  position: relative;
}

.section-title-wrap {
  text-align: center;
  margin-bottom: 48px;
}

.section-pill {
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* 核心优势卡片 (3卡) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
  background: var(--bg-card-hover);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5), 0 0 25px rgba(16, 185, 129, 0.2);
}

.feature-icon-box {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: rgba(16, 185, 129, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--primary);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.feature-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 18px;
  flex-grow: 1;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.feature-tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 4px 10px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

/* 流媒体与AI支持区 */
.media-ai-section {
  background: transparent;
  border-top: none;
  border-bottom: none;
  position: relative;
}

.media-ai-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.media-ai-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

.media-ai-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.media-ai-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
}

.badge-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 99px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--primary);
  font-weight: 600;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.media-ai-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 22px;
  line-height: 1.6;
}

.media-icon-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.media-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  transition: var(--transition);
}

.media-pill:hover {
  background: rgba(16, 185, 129, 0.08);
  border-color: var(--primary);
  color: var(--primary);
}

.media-pill svg {
  flex-shrink: 0;
  color: var(--primary);
}

/* 价格套餐对比表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5), 0 0 25px rgba(16, 185, 129, 0.2);
}

.pricing-card.popular {
  border-color: var(--primary);
  background: linear-gradient(180deg, rgba(16, 26, 44, 0.95) 0%, rgba(10, 16, 28, 0.98) 100%);
  box-shadow: 0 8px 30px rgba(16, 185, 129, 0.25);
}

.popular-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-brand);
  color: #040810;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: 99px;
  letter-spacing: 0.5px;
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.5);
}

.pricing-name {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.pricing-desc {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 20px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-glass);
}

.pricing-currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
}

.pricing-amount {
  font-family: var(--font-mono);
  font-size: 2.9rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

.pricing-cycle {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.4;
}

.pricing-features li svg {
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 2px;
}

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

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: rgba(16, 185, 129, 0.4);
}

.testimonial-stars {
  color: var(--secondary);
  font-size: 0.95rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: 0.92rem;
  color: var(--text-main);
  line-height: 1.65;
  margin-bottom: 20px;
}

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

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 800;
  color: #040810;
  font-size: 0.85rem;
}

.author-info h4 {
  font-size: 0.92rem;
  font-weight: 700;
}

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

/* FAQ 常见问题 (原生 details / summary 无JS极速实现) */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  max-width: 1040px;
  margin: 0 auto;
}

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

.faq-item[open] {
  border-color: var(--primary);
  background: var(--bg-card-hover);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.12);
}

.faq-question {
  padding: 20px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  color: var(--text-main);
}

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

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--primary);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 20px 20px;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
  border-top: 1px dashed rgba(16, 185, 129, 0.2);
  padding-top: 14px;
}

/* 底部 CTA 工业横幅 */
.cta-banner {
  margin: 40px auto 0;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.12) 0%, rgba(245, 158, 11, 0.12) 100%);
  border: 1px solid rgba(16, 185, 129, 0.4);
  border-radius: var(--radius-lg);
  padding: 48px 36px;
  text-align: center;
  box-shadow: var(--shadow-glow);
}

.cta-banner h2 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.cta-banner p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto 28px;
}

/* 页脚 Footer - 严格保留 4 个指定标题 */
.footer {
  margin-top: 80px;
  border-top: 1px solid var(--border-glass);
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 40px 0 32px;
}

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

.footer-nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  position: relative;
  padding: 6px 0;
}

.footer-nav a:hover {
  color: var(--primary);
  text-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

.footer-bottom {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-light);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 24px;
}

/* 子页面通用文章样式 */
.page-header {
  padding: 60px 0 30px;
  text-align: center;
  border-bottom: 1px solid var(--border-glass);
  background: linear-gradient(180deg, rgba(10, 14, 26, 0.6) 0%, rgba(13, 19, 34, 0.8) 100%);
}

.page-title {
  font-family: var(--font-heading);
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 14px;
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 650px;
  margin: 0 auto;
}

/* 面包屑导航规范 */
.breadcrumb-nav {
  margin: 20px auto 0;
  max-width: 880px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.breadcrumb-nav a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}
.breadcrumb-nav a:hover {
  color: var(--primary);
}
.breadcrumb-sep {
  color: var(--text-light);
}
.breadcrumb-current {
  color: var(--primary);
  font-weight: 600;
}

/* 文章底部上一篇/下一篇导航 */
.article-pagination {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border-glass);
  flex-wrap: wrap;
}
.article-pagination a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.92rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-pagination a:hover {
  color: var(--primary);
}

.article-content {
  max-width: 880px;
  margin: 40px auto 70px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

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

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

.article-section h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-section p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 14px;
}

.article-section ul, .article-section ol {
  color: var(--text-muted);
  padding-left: 24px;
  margin-bottom: 14px;
  line-height: 1.75;
}

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

.notice-box {
  background: rgba(16, 185, 129, 0.08);
  border-left: 4px solid var(--primary);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
  font-size: 0.92rem;
  color: #e2e8f0;
}

.notice-box.warning {
  background: rgba(239, 68, 68, 0.08);
  border-left-color: #ef4444;
}

/* 网站地图样式 */
.sitemap-group {
  margin-bottom: 28px;
}

.sitemap-group h3 {
  font-size: 1.15rem;
  color: var(--text-main);
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sitemap-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  list-style: none;
  padding: 0;
}

.sitemap-links li a {
  display: block;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.92rem;
}

.sitemap-links li a:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(16, 185, 129, 0.06);
}

/* 知识科普 SEO 文章集与文章内 FAQ */
.seo-toc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin: 36px auto 44px;
  max-width: 900px;
  box-shadow: var(--shadow-glow);
}

.seo-toc-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.seo-toc-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  list-style: none;
}

.seo-toc-list li a {
  display: block;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.seo-toc-list li a:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(16, 185, 129, 0.08);
  transform: translateX(4px);
}

.seo-article-block {
  max-width: 900px;
  margin: 0 auto 50px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  position: relative;
  transition: var(--transition);
}

.seo-article-block:hover {
  border-color: rgba(16, 185, 129, 0.4);
}

.seo-article-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.seo-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 99px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--primary);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.seo-date, .seo-words {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-light);
}

.seo-article-h2 {
  font-family: var(--font-heading);
  font-size: 1.65rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 20px;
  color: var(--text-main);
}

.seo-article-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  margin: 24px 0 12px;
}

.seo-article-body p {
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.8;
  margin-bottom: 14px;
}

.seo-article-body ul, .seo-article-body ol {
  color: var(--text-muted);
  padding-left: 22px;
  margin-bottom: 16px;
  line-height: 1.75;
}

.seo-article-body li {
  margin-bottom: 6px;
}

.inline-link {
  color: var(--primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.inline-link:hover {
  color: var(--secondary);
}

.article-faq-group {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px dashed rgba(16, 185, 129, 0.2);
}

.article-faq-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-faq-group .faq-item {
  margin-bottom: 12px;
  background: rgba(255, 255, 255, 0.02);
}

.article-faq-group .faq-question {
  padding: 14px 18px;
  font-size: 0.95rem;
}

.article-faq-group .faq-answer {
  padding: 0 18px 16px;
  font-size: 0.9rem;
}

/* ==========================================================================
   响应式媒体查询 (@media) - 确保移动端单栏完美适配，点击区域舒适
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-left {
    text-align: center;
  }
  .hero-btns {
    justify-content: center;
  }
  .features-grid,
  .pricing-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .media-ai-container {
    grid-template-columns: 1fr;
  }
  .faq-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.8rem;
  }
  .hero-title .sub-title {
    font-size: 1.7rem;
  }
}

@media (max-width: 768px) {
  .telemetry-corner {
    display: none; /* 移动端隐藏角落多余指示，防遮挡内容 */
  }
  .header-container {
    height: 64px;
  }
  .nav-links {
    display: none;
  }
  .hero {
    padding: 40px 0;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .hero-title .sub-title {
    font-size: 1.35rem;
  }
  .hero-desc {
    font-size: 0.98rem;
  }
  .hero-btns {
    flex-direction: column;
  }
  .hero-btns .btn {
    width: 100%;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    padding: 16px;
  }
  .stat-num {
    font-size: 1.4rem;
  }
  .section {
    padding: 48px 0;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .media-icon-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-content, .seo-article-block {
    padding: 24px 18px;
  }
  .seo-toc-list, .sitemap-links {
    grid-template-columns: 1fr;
  }
  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }
  .cta-banner {
    padding: 32px 20px;
  }
  .cta-banner h2 {
    font-size: 1.6rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.95rem;
  }
  .media-icon-grid {
    grid-template-columns: 1fr;
  }
}

/* 动效适配系统无障碍偏好 (prefers-reduced-motion) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .scanline-overlay,
  .glow-orb,
  .server-rack-tower,
  .led,
  .load-fill {
    animation: none !important;
  }
}