/* LinkCube绿叶 - 瑞士工程制图与精密技术版式 (Swiss Technical Precision)
   升级版：高饱和多维色彩体系 | 动态微交互 | 实时网络遥测仪表盘 | 0 外部依赖 */

:root {
  /* 品牌主色阶 - 极速光纤蓝 */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-primary-border: #bfdbfe;
  --color-primary-glow: rgba(37, 99, 235, 0.28);

  /* 多维语义色彩体系 (丰富全站色彩层级) */
  --color-emerald: #10b981;
  --color-emerald-hover: #059669;
  --color-emerald-light: #ecfdf5;
  --color-emerald-border: #a7f3d0;
  --color-emerald-glow: rgba(16, 185, 129, 0.28);

  --color-violet: #8b5cf6;
  --color-violet-hover: #7c3aed;
  --color-violet-light: #f5f3ff;
  --color-violet-border: #ddd6fe;
  --color-violet-glow: rgba(139, 92, 246, 0.28);

  --color-amber: #f59e0b;
  --color-amber-hover: #d97706;
  --color-amber-light: #fffbeb;
  --color-amber-border: #fde68a;
  --color-amber-glow: rgba(245, 158, 11, 0.28);

  --color-rose: #f43f5e;
  --color-rose-hover: #e11d48;
  --color-rose-light: #fff1f2;
  --color-rose-border: #fecdd3;
  --color-rose-glow: rgba(244, 63, 94, 0.28);

  --color-cyan: #06b6d4;
  --color-cyan-light: #ecfeff;
  --color-cyan-border: #a5f3fc;

  /* 背景与表面 - 纯白与工程冷灰 */
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-surface-muted: #f8fafc;
  --color-surface-contrast: #090d16;

  /* 文字色阶 */
  --color-text-main: #090d16;
  --color-text-body: #334155;
  --color-text-muted: #64748b;

  /* 结构边框与刻度线 */
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-border-dark: #090d16;

  /* 字体栈 - 系统级无衬线与等宽工程字 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;

  /* 倒角规范 */
  --radius-xs: 3px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --container-max: 1160px;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--color-bg);
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text-body);
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 76px;
  position: relative;
}

@media (min-width: 769px) {
  body {
    padding-bottom: 0;
  }
}

/* 顶部平滑阅读进度指示条 (随滚动动态延伸) */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-cyan), var(--color-emerald), var(--color-violet), var(--color-amber));
  z-index: 9999;
  transition: width 0.08s linear;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: all 0.15s ease;
}

a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

/* 顶部导航栏 - 高透玻璃拟态与多色状态 */
.site-header {
  background-color: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--color-text-main);
  letter-spacing: -0.01em;
}

.site-logo:hover {
  text-decoration: none;
  color: var(--color-primary);
}

.logo-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), #1e40af);
  color: #ffffff;
  padding: 2px 7px;
  border-radius: var(--radius-xs);
  letter-spacing: 0.05em;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
}

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

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text-muted);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.nav-link:hover::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-cyan));
  border-radius: 2px;
}

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

.menu-toggle {
  display: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  padding: 6px 8px;
  cursor: pointer;
  color: var(--color-text-main);
}

/* 按钮体系 - 动态高光流转与多态微动效 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 700;
  padding: 9px 22px;
  min-height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

/* 动态光束流转动效 */
@keyframes sweep-shine {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

.btn-primary {
  background: linear-gradient(110deg, #1d4ed8 0%, #2563eb 25%, #60a5fa 50%, #2563eb 75%, #1d4ed8 100%);
  background-size: 200% 100%;
  color: #ffffff;
  border-color: #1d4ed8;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  animation: sweep-shine 1.6s infinite linear;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
  transform: translateY(-2px);
  color: #ffffff;
  text-decoration: none;
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text-main);
  border: 1px solid var(--color-border-strong);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.btn-secondary:hover {
  background-color: var(--color-surface-muted);
  color: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  text-decoration: none;
}

.btn-lg {
  padding: 13px 30px;
  font-size: 1.02rem;
  min-height: 50px;
}

.btn-full {
  width: 100%;
}

/* 呼吸雷达脉冲动效 (Ping & Online 状态) */
@keyframes pulse-ring {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 7px rgba(16, 185, 129, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-emerald);
  border-radius: 50%;
  display: inline-block;
  animation: pulse-ring 2s infinite cubic-bezier(0.45, 0, 0.55, 1);
}

.pulse-dot--blue {
  background-color: var(--color-primary);
  box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7);
}

/* Hero 区块 - 丰富环境渐变光晕 + 实时网络遥测仪表盘 */
.hero-section {
  padding: 72px 0 68px;
  background:
    radial-gradient(circle at 50% -10%, rgba(37, 99, 235, 0.12), transparent 55%),
    radial-gradient(circle at 10% 25%, rgba(139, 92, 246, 0.08), transparent 45%),
    radial-gradient(circle at 90% 30%, rgba(16, 185, 129, 0.08), transparent 45%),
    radial-gradient(circle at 80% 90%, rgba(245, 158, 11, 0.06), transparent 40%),
    linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

/* 细腻背景工程点阵水印 */
.hero-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(#cbd5e1 1.1px, transparent 1.1px);
  background-size: 28px 28px;
  opacity: 0.35;
  pointer-events: none;
}

.hero-wrapper {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  align-items: center;
  gap: 48px;
  position: relative;
  z-index: 2;
}

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

.hero-technical-tag {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  border: 1px solid var(--color-primary-border);
  padding: 5px 14px;
  border-radius: var(--radius-xs);
  margin-bottom: 22px;
  letter-spacing: 0.04em;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.08);
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 900;
  line-height: 1.2;
  color: var(--color-text-main);
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

/* 渐变标题强调色 */
.hero-title-gradient {
  background: linear-gradient(120deg, #1d4ed8 0%, #7c3aed 50%, #059669 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.12rem;
  color: var(--color-text-muted);
  max-width: 580px;
  margin-bottom: 32px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 34px;
}

/* 遥测数据标尺 (静态特色组件) */
.hero-meta {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  padding: 10px 18px;
  background-color: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.hero-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-weight: 600;
}

.hero-meta-item--online {
  color: var(--color-emerald-hover);
}

.hero-meta-item--primary {
  color: var(--color-primary);
}

/* 核心静态视觉组件：实时节点遥测仪表盘 (Telemetry Dashboard Mockup) */
.telemetry-dashboard {
  background: #0f172a;
  border: 1px solid #1e293b;
  border-top: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 24px;
  color: #e2e8f0;
  box-shadow: 0 16px 36px -8px rgba(15, 23, 42, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.05);
  font-family: var(--font-mono);
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.telemetry-dashboard:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -6px rgba(15, 23, 42, 0.32), 0 0 24px rgba(37, 99, 235, 0.2);
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid #1e293b;
  margin-bottom: 16px;
}

.dashboard-title-group {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.78rem;
  font-weight: 700;
  color: #94a3b8;
  letter-spacing: 0.06em;
}

.dashboard-live-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  font-weight: 800;
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
}

.node-status-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 18px;
}

.node-status-row {
  display: grid;
  grid-template-columns: 110px 1fr 70px;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
}

.node-city {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #f1f5f9;
  font-weight: 600;
  white-space: nowrap;
}

.node-city-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.node-city-dot--green { background-color: var(--color-emerald); box-shadow: 0 0 6px var(--color-emerald); }
.node-city-dot--blue { background-color: var(--color-cyan); box-shadow: 0 0 6px var(--color-cyan); }
.node-city-dot--purple { background-color: var(--color-violet); box-shadow: 0 0 6px var(--color-violet); }
.node-city-dot--amber { background-color: var(--color-amber); box-shadow: 0 0 6px var(--color-amber); }

.node-bar-container {
  height: 6px;
  background-color: #1e293b;
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.node-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.6s ease;
}

.node-bar-fill--green {
  width: 94%;
  background: linear-gradient(90deg, #10b981, #34d399);
}

.node-bar-fill--blue {
  width: 88%;
  background: linear-gradient(90deg, #2563eb, #38bdf8);
}

.node-bar-fill--purple {
  width: 82%;
  background: linear-gradient(90deg, #8b5cf6, #c084fc);
}

.node-bar-fill--amber {
  width: 68%;
  background: linear-gradient(90deg, #f59e0b, #fbbf24);
}

.node-latency {
  text-align: right;
  font-weight: 700;
  font-size: 0.78rem;
}

.node-latency--green { color: #34d399; }
.node-latency--blue { color: #38bdf8; }
.node-latency--purple { color: #c084fc; }
.node-latency--amber { color: #fbbf24; }

.dashboard-footer {
  padding-top: 14px;
  border-top: 1px solid #1e293b;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.72rem;
  color: #64748b;
}

.dashboard-spec-pill {
  background-color: #1e293b;
  color: #94a3b8;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  border: 1px solid #334155;
}

/* 通用区块与标题 */
.section {
  padding: 76px 0;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.section-alt {
  background-color: var(--color-surface-muted);
}

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

.section-index-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  border: 1px solid var(--color-primary-border);
  padding: 3px 10px;
  border-radius: var(--radius-xs);
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--color-text-main);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-description {
  font-size: 1.02rem;
  color: var(--color-text-muted);
  max-width: 660px;
  margin: 0 auto;
  line-height: 1.7;
}

/* 网格系统 */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

/* 1. 特性卡 (4张独立差异化色彩主题 + 悬浮立体微升) */
.feature-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
}

.feature-card:hover {
  transform: translateY(-6px);
}

/* 特性卡专属色彩方案 */
.feature-card--blue {
  border-top: 4px solid var(--color-primary);
}
.feature-card--blue:hover {
  border-color: var(--color-primary);
  box-shadow: 0 14px 28px -6px var(--color-primary-glow);
}
.feature-card--blue .feature-icon-wrapper {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border: 1px solid var(--color-primary-border);
}

.feature-card--green {
  border-top: 4px solid var(--color-emerald);
}
.feature-card--green:hover {
  border-color: var(--color-emerald);
  box-shadow: 0 14px 28px -6px var(--color-emerald-glow);
}
.feature-card--green .feature-icon-wrapper {
  background-color: var(--color-emerald-light);
  color: var(--color-emerald-hover);
  border: 1px solid var(--color-emerald-border);
}

.feature-card--purple {
  border-top: 4px solid var(--color-violet);
}
.feature-card--purple:hover {
  border-color: var(--color-violet);
  box-shadow: 0 14px 28px -6px var(--color-violet-glow);
}
.feature-card--purple .feature-icon-wrapper {
  background-color: var(--color-violet-light);
  color: var(--color-violet-hover);
  border: 1px solid var(--color-violet-border);
}

.feature-card--amber {
  border-top: 4px solid var(--color-amber);
}
.feature-card--amber:hover {
  border-color: var(--color-amber);
  box-shadow: 0 14px 28px -6px var(--color-amber-glow);
}
.feature-card--amber .feature-icon-wrapper {
  background-color: var(--color-amber-light);
  color: var(--color-amber-hover);
  border: 1px solid var(--color-amber-border);
}

.feature-header-spec {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.feature-icon-wrapper {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: transform 0.2s ease;
}

.feature-card:hover .feature-icon-wrapper {
  transform: scale(1.08);
}

.feature-icon-wrapper svg {
  width: 22px;
  height: 22px;
}

.feature-code {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--color-text-muted);
  font-weight: 700;
  background-color: var(--color-surface-muted);
  padding: 3px 7px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--color-border);
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--color-text-body);
  line-height: 1.68;
}

/* 2. 应用生态与流媒体/AI支持 (彩色品牌徽标与差异化底色) */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.ecosystem-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 34px 30px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
  transition: all 0.22s ease;
}

.ecosystem-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 32px -6px rgba(0, 0, 0, 0.08);
}

.ecosystem-card--streaming {
  border-left: 4px solid var(--color-rose);
}
.ecosystem-card--streaming .ecosystem-badge {
  background: linear-gradient(135deg, #e11d48, #f43f5e);
  color: #ffffff;
}

.ecosystem-card--ai {
  border-left: 4px solid var(--color-violet);
}
.ecosystem-card--ai .ecosystem-badge {
  background: linear-gradient(135deg, #7c3aed, #8b5cf6);
  color: #ffffff;
}

.ecosystem-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 18px;
}

.ecosystem-badge {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  letter-spacing: 0.06em;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.ecosystem-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text-main);
}

.service-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* 彩色品牌服务微标 (Service Pills) */
.service-pill {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: var(--radius-xs);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}

.service-pill:hover {
  transform: scale(1.05);
}

/* 流媒体品牌色 */
.pill-netflix { background: #fee2e2; color: #b91c1c; border-color: #fca5a5; }
.pill-disney { background: #e0e7ff; color: #3730a3; border-color: #a5b4fc; }
.pill-youtube { background: #ffe4e6; color: #9f1239; border-color: #fecdd3; }
.pill-spotify { background: #dcfce7; color: #166534; border-color: #86efac; }
.pill-prime { background: #e0f2fe; color: #075985; border-color: #7dd3fc; }
.pill-appletv { background: #f1f5f9; color: #0f172a; border-color: #cbd5e1; }

/* AI 品牌色 */
.pill-chatgpt { background: #ccfbf1; color: #115e59; border-color: #5eead4; }
.pill-claude { background: #fef3c7; color: #92400e; border-color: #fde68a; }
.pill-gemini { background: #ede9fe; color: #5b21b6; border-color: #c4b5fd; }
.pill-perplexity { background: #e0f2fe; color: #0369a1; border-color: #7dd3fc; }
.pill-copilot { background: #fae8ff; color: #86198f; border-color: #f0abfc; }
.pill-cursor { background: #e2e8f0; color: #0f172a; border-color: #94a3b8; }

/* 3. 使用场景卡 (场景彩色分类指示) */
.scenario-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 28px 24px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
  transition: all 0.2s ease;
}

.scenario-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-primary-border);
  box-shadow: 0 12px 24px -4px rgba(37, 99, 235, 0.1);
}

.scenario-header {
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--color-border);
  margin-bottom: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.scenario-title {
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--color-text-main);
}

.scenario-device {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-primary);
  font-weight: 700;
  background-color: var(--color-primary-light);
  display: inline-block;
  align-self: flex-start;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
}

.scenario-desc {
  font-size: 0.92rem;
  color: var(--color-text-body);
  line-height: 1.68;
}

/* 4. 定价资费表 (鲜明差异化层级对比) */
.pricing-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 36px -6px rgba(0, 0, 0, 0.09);
}

/* 进阶推荐主推档 - 皇家蓝发光渐变框 */
.pricing-card-featured {
  border: 2px solid var(--color-primary);
  background: linear-gradient(180deg, #ffffff 0%, #eff6ff 100%);
  box-shadow: 0 12px 32px -4px rgba(37, 99, 235, 0.22);
}

.pricing-card-featured:hover {
  box-shadow: 0 20px 48px -4px rgba(37, 99, 235, 0.32);
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  right: 22px;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #ffffff;
  font-size: 0.74rem;
  font-weight: 800;
  padding: 3px 12px;
  border-radius: var(--radius-xs);
  letter-spacing: 0.06em;
  box-shadow: 0 4px 10px rgba(245, 158, 11, 0.35);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.pricing-ribbon::before {
  content: "★";
  font-size: 0.8rem;
}

.pricing-name {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--color-text-main);
  margin-bottom: 6px;
}

.pricing-audience {
  font-size: 0.86rem;
  color: var(--color-text-muted);
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}

.pricing-price {
  display: flex;
  align-items: baseline;
  margin-bottom: 24px;
}

.price-currency {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin-right: 2px;
}

.price-amount {
  font-family: var(--font-mono);
  font-size: 2.85rem;
  font-weight: 900;
  color: var(--color-text-main);
  line-height: 1;
}

.pricing-card-featured .price-amount {
  color: var(--color-primary);
}

.price-period {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-left: 6px;
  text-transform: uppercase;
}

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

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--color-text-body);
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px dotted rgba(203, 213, 225, 0.6);
}

.feature-check {
  font-family: var(--font-mono);
  color: var(--color-emerald);
  font-weight: 900;
  font-size: 0.95rem;
}

/* 5. 常见问题 - 原生手风琴带旋转微交互 */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
  transition: all 0.18s ease;
}

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

.faq-item[open] {
  border-color: var(--color-primary);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.08);
}

.faq-question {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-main);
  padding: 18px 22px;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  transition: color 0.15s ease;
}

.faq-question:hover {
  color: var(--color-primary);
}

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

.faq-question::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-muted);
  transition: transform 0.2s ease, color 0.2s ease;
}

details[open] .faq-question::after {
  content: "−";
  color: var(--color-primary);
  transform: rotate(180deg);
}

.faq-answer {
  font-size: 0.94rem;
  color: var(--color-text-body);
  line-height: 1.75;
  padding: 0 22px 22px 22px;
  border-top: 1px solid var(--color-border);
  background-color: #fafbfc;
}

/* 6. Final CTA 区块 - 深空紫蓝光晕与双核环境光 */
.cta-banner {
  background:
    radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.35), transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.35), transparent 45%),
    linear-gradient(135deg, #090d16 0%, #0f172a 50%, #1e1b4b 100%);
  color: #ffffff;
  border-radius: var(--radius-md);
  padding: 60px 36px;
  text-align: center;
  max-width: 920px;
  margin: 0 auto;
  position: relative;
  box-shadow: 0 20px 48px -10px rgba(15, 23, 42, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.cta-banner-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #93c5fd;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.cta-banner-title {
  font-size: 2.15rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.cta-banner-subtitle {
  font-size: 1.05rem;
  color: #cbd5e1;
  max-width: 580px;
  margin: 0 auto 30px;
  line-height: 1.7;
}

.cta-banner .btn-primary {
  background: #ffffff;
  color: #090d16;
  border-color: #ffffff;
  box-shadow: 0 4px 18px rgba(255, 255, 255, 0.25);
  font-size: 1.02rem;
}

.cta-banner .btn-primary:hover {
  background: #f8fafc;
  color: var(--color-primary);
  box-shadow: 0 6px 24px rgba(255, 255, 255, 0.45);
  transform: translateY(-2px);
}

/* 7. 页脚 - 严格合规，仅导航、版权与联盟披露 */
.site-footer {
  background-color: #050811;
  color: #94a3b8;
  padding: 52px 0 28px;
  font-size: 0.88rem;
  border-top: 1px solid #1e293b;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 26px;
  padding-bottom: 30px;
  border-bottom: 1px solid #1e293b;
}

.footer-brand-title {
  color: #ffffff;
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 0.86rem;
  line-height: 1.65;
  max-width: 380px;
}

.footer-nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 22px;
  list-style: none;
}

.footer-nav-item a {
  color: #94a3b8;
  text-decoration: none;
  font-weight: 500;
}

.footer-nav-item a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
}

.footer-disclosure {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #64748b;
  margin-top: 6px;
  line-height: 1.5;
}

/* 8. 移动端吸底 CTA 栏 */
.mobile-sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.98);
  border-top: 2px solid var(--color-primary);
  padding: 10px 16px;
  z-index: 999;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
}

.mobile-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mobile-cta-text {
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--color-text-main);
  line-height: 1.25;
}

.mobile-cta-sub {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--color-emerald-hover);
  display: flex;
  align-items: center;
  gap: 5px;
}

/* 9. 文章与技术指南页专用样式 */
.article-container, .page-container {
  max-width: 840px;
  margin: 36px auto 60px;
  padding: 0 20px;
}

.breadcrumb-nav {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.breadcrumb-nav a {
  color: var(--color-text-muted);
}

.breadcrumb-nav a:hover {
  color: var(--color-primary);
}

.page-header-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 34px 30px;
  margin-bottom: 30px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.03);
}

.page-main-title {
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-text-main);
  line-height: 1.3;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.article-meta-info {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  padding-top: 14px;
  margin-top: 16px;
}

.article-content {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 40px 34px;
  font-size: 1.02rem;
  line-height: 1.82;
  color: var(--color-text-body);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.03);
}

.article-content h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary);
}

.article-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-top: 26px;
  margin-bottom: 12px;
}

.article-content p {
  margin-bottom: 20px;
}

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

.article-content li {
  margin-bottom: 9px;
}

.article-content blockquote {
  background-color: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  padding: 14px 20px;
  margin: 24px 0;
  color: var(--color-text-main);
  font-size: 0.95rem;
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 26px 0;
  font-size: 0.9rem;
}

.article-content th, .article-content td {
  border: 1px solid var(--color-border);
  padding: 11px 14px;
  text-align: left;
}

.article-content th {
  background-color: var(--color-surface-muted);
  font-weight: 700;
  color: var(--color-text-main);
  border-bottom: 2px solid var(--color-primary);
}

.article-faq-box {
  background-color: var(--color-surface-muted);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-emerald);
  border-radius: var(--radius-xs);
  padding: 22px;
  margin: 34px 0;
}

.article-faq-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--color-text-main);
}

.article-cta-box {
  background: linear-gradient(135deg, #090d16 0%, #1e1b4b 100%);
  color: #ffffff;
  border-radius: var(--radius-sm);
  padding: 34px 28px;
  text-align: center;
  margin: 38px 0 26px;
  box-shadow: 0 12px 28px -6px rgba(0, 0, 0, 0.25);
}

.article-cta-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 10px;
}

.article-cta-desc {
  font-size: 0.94rem;
  color: #cbd5e1;
  max-width: 540px;
  margin: 0 auto 22px;
}

.article-cta-box .btn-primary {
  background-color: #ffffff;
  color: #090d16;
  border-color: #ffffff;
}

.article-cta-box .btn-primary:hover {
  background-color: #f1f5f9;
  color: var(--color-primary);
}

.internal-links-box {
  border-top: 1px dashed var(--color-border);
  padding-top: 26px;
  margin-top: 34px;
}

.internal-links-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin-bottom: 14px;
}

.internal-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 0.94rem;
}

/* 响应式断点 */
@media (max-width: 992px) {
  .hero-wrapper {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero-content {
    text-align: center;
  }
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .ecosystem-grid {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-meta {
    flex-direction: column;
    gap: 10px;
    width: 100%;
  }
  .node-status-row {
    grid-template-columns: 90px 1fr 60px;
    font-size: 0.74rem;
  }
  .grid-4, .ecosystem-grid, .grid-2 {
    grid-template-columns: 1fr;
  }
  .mobile-sticky-cta {
    display: block;
  }
  .site-nav {
    display: none;
    position: absolute;
    top: 66px;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 2px solid var(--color-primary);
    flex-direction: column;
    padding: 22px;
    gap: 18px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  }
  .site-nav.is-open {
    display: flex;
  }
  .menu-toggle {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .btn, a, .telemetry-dashboard, .feature-card, .pricing-card, .pulse-dot {
    animation: none !important;
    transition: none !important;
  }
}