/* ==========================================================================
   飞鸟云 (FeiNiao Yun) - 游隼极限俯冲架构 (Peregrine Falcon Stoop UI)
   Extreme-Speed Network Architecture | Pure Vanilla CSS | 秒开极简
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 调色盘与超音速气动设计系统 (Aerodynamic Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* 白天模式 (默认)：高空巡航银白与极速蓝橙 */
  --bg-void: #f5f7fb;
  --bg-primary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-glass: rgba(255, 255, 255, 0.75);
  --bg-telemetry: #edf2f7;
  --border-telemetry: rgba(203, 213, 225, 0.9);
  --border-hover: rgba(255, 107, 0, 0.6);

  /* 文字 */
  --text-main: #090d16;
  --text-sub: #334155;
  --text-muted: #64748b;
  --text-telemetry: #475569;

  /* 超音速马赫橙与科技蓝 */
  --mach-amber: #ff6b00;
  --mach-amber-glow: rgba(255, 107, 0, 0.2);
  --mach-cyan: #0284c7;
  --mach-gradient: linear-gradient(135deg, #ff6b00 0%, #ea580c 50%, #c2410c 100%);
  --speed-gradient: linear-gradient(135deg, #ff6b00 0%, #3b82f6 100%);

  /* 阴影与光效 */
  --shadow-telemetry: 0 4px 20px -2px rgba(15, 23, 42, 0.08);
  --shadow-hover: 0 16px 36px -4px rgba(255, 107, 0, 0.18);
  --grid-line-color: rgba(148, 163, 184, 0.12);

  /* 字体系统 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Consolas, Monaco, "Courier New", monospace;

  --transition-fast: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-spring: all 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 深色模式：平流层黑夜 (#030408) 与深渊空域 (#080C16) */
[data-theme="dark"] {
  --bg-void: #030408;
  --bg-primary: #080c16;
  --bg-card: rgba(11, 16, 28, 0.8);
  --bg-glass: rgba(8, 12, 22, 0.78);
  --bg-telemetry: #0d1424;
  --border-telemetry: rgba(255, 255, 255, 0.09);
  --border-hover: rgba(255, 107, 0, 0.7);

  --text-main: #f8fafc;
  --text-sub: #cbd5e1;
  --text-muted: #8492a6;
  --text-telemetry: #94a3b8;

  --mach-amber: #ff6b00;
  --mach-amber-glow: rgba(255, 107, 0, 0.35);
  --mach-cyan: #38bdf8;
  --mach-gradient: linear-gradient(135deg, #ff6b00 0%, #ff8c00 100%);
  --speed-gradient: linear-gradient(135deg, #ff6b00 0%, #00d2ff 100%);

  --shadow-telemetry: 0 4px 24px -2px rgba(0, 0, 0, 0.6);
  --shadow-hover: 0 20px 48px -6px rgba(255, 107, 0, 0.3);
  --grid-line-color: rgba(255, 255, 255, 0.04);
}

/* --------------------------------------------------------------------------
   2. 全局重置与平滑透视网格 (Vertical Cockpit Grid)
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-void);
  color: var(--text-main);
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 3D 纵深透视背景网格 (Perspective Dive-Tunnel Grid) */
.dive-tunnel-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  background-image: 
    linear-gradient(to right, var(--grid-line-color) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line-color) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 90% 80% at 50% 30%, black 20%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 30%, black 20%, transparent 85%);
}

/* 互动气动风洞气流画布 (Interactive Aerodynamic Canvas) */
.aero-interactive-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
}

/* 边缘风洞气流向量条纹 (Wind-Tunnel Streak Vectors) */
.wind-tunnel-left,
.wind-tunnel-right {
  position: fixed;
  top: 0;
  width: 120px;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
  opacity: 0.35;
}

.wind-tunnel-left { left: 0; background: linear-gradient(90deg, var(--mach-amber-glow) 0%, transparent 100%); }
.wind-tunnel-right { right: 0; background: linear-gradient(-90deg, var(--mach-amber-glow) 0%, transparent 100%); }

.streak-line {
  position: absolute;
  width: 2px;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--mach-amber), transparent);
  animation: windRush 1.4s infinite cubic-bezier(0.4, 0, 0.2, 1);
}

.streak-line:nth-child(1) { left: 25px; height: 120px; animation-delay: 0.2s; animation-duration: 1.1s; }
.streak-line:nth-child(2) { left: 60px; height: 70px; animation-delay: 0.6s; animation-duration: 1.6s; }
.streak-line:nth-child(3) { right: 30px; height: 100px; animation-delay: 0.4s; animation-duration: 1.2s; }
.streak-line:nth-child(4) { right: 75px; height: 60px; animation-delay: 0.8s; animation-duration: 1.8s; }

@keyframes windRush {
  0% { transform: translateY(-120px); opacity: 0; }
  30% { opacity: 0.8; }
  100% { transform: translateY(105vh); opacity: 0; }
}

.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 2;
}

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

ul {
  list-style: none;
}

/* --------------------------------------------------------------------------
   3. 战机座舱平视顶部导航 (Cockpit Telemetry Header)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-telemetry);
  transition: var(--transition-normal);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

/* 品牌 Logo 与游隼掠影 */
.brand-box {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.falcon-emblem {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--mach-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px var(--mach-amber-glow);
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

.falcon-emblem svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* 俯冲马赫数显徽标 */
.mach-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255, 107, 0, 0.12);
  color: var(--mach-amber);
  border: 1px solid rgba(255, 107, 0, 0.35);
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.mach-badge::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mach-amber);
  box-shadow: 0 0 8px var(--mach-amber);
}

/* 仪表盘实时过载 (G-Force Telemetry Widget) */
.gforce-dial-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  background: var(--bg-telemetry);
  border: 1px solid var(--border-telemetry);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-telemetry);
}

.gforce-bar-track {
  width: 44px;
  height: 6px;
  background: rgba(148, 163, 184, 0.2);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.gforce-bar-fill {
  width: 82%;
  height: 100%;
  background: var(--mach-gradient);
  border-radius: 3px;
  animation: gforceVibe 2s infinite ease-in-out;
}

@keyframes gforceVibe {
  0%, 100% { width: 78%; }
  50% { width: 92%; }
}

/* 导航锚点目录 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

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

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--mach-amber);
  transition: width 0.25s ease;
}

.nav-links a:hover {
  color: var(--mach-amber);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* 推荐资讯高亮小红点 */
.nav-links a.nav-highlight {
  color: var(--mach-amber);
  font-weight: 700;
  position: relative;
}

.nav-links a.nav-highlight::before {
  content: "NEW";
  position: absolute;
  top: -10px;
  right: -24px;
  font-size: 0.6rem;
  font-family: var(--font-mono);
  background: var(--mach-amber);
  color: #fff;
  padding: 1px 4px;
  border-radius: 3px;
  transform: scale(0.85);
}

/* 导航操作区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 精致专业半透明昼夜切换按钮 */
.theme-toggle-btn {
  background: var(--bg-telemetry);
  border: 1px solid var(--border-telemetry);
  color: var(--text-main);
  width: 42px;
  height: 42px;
  border-radius: 10px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.theme-toggle-btn:hover {
  border-color: var(--mach-amber);
  color: var(--mach-amber);
  box-shadow: 0 0 12px var(--mach-amber-glow);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.icon-sun { display: none; }
.icon-moon { display: block; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* --------------------------------------------------------------------------
   4. 按钮组件规范与超音速锥形激波特效 (Supersonic Shockwave)
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: 10px;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-fast);
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--mach-gradient);
  color: #ffffff !important;
  box-shadow: 0 4px 18px var(--mach-amber-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 107, 0, 0.45);
}

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

.btn-secondary {
  background: var(--bg-telemetry);
  color: var(--text-main);
  border: 1px solid var(--border-telemetry);
}

.btn-secondary:hover {
  border-color: var(--mach-amber);
  color: var(--mach-amber);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 34px;
  font-size: 1.08rem;
  border-radius: 12px;
}

.btn-block {
  width: 100%;
}

/* 超音速激波点击动画 (Supersonic Shockwave Ripple) */
.shockwave-ripple {
  position: absolute;
  border-radius: 50%;
  border: 2px solid rgba(255, 107, 0, 0.8);
  pointer-events: none;
  animation: shockwaveExpand 0.6s cubic-bezier(0.1, 0.8, 0.3, 1) forwards;
}

@keyframes shockwaveExpand {
  0% { width: 0; height: 0; opacity: 1; transform: translate(-50%, -50%) scale(0.2); }
  100% { width: 320px; height: 320px; opacity: 0; transform: translate(-50%, -50%) scale(1.6); border-width: 0.5px; }
}

/* --------------------------------------------------------------------------
   5. 主视觉区：游隼 390km/h 极限俯冲隧道 (Peregrine Dive Canopy)
   -------------------------------------------------------------------------- */
.hero-section {
  padding: 70px 0 60px;
  text-align: center;
  position: relative;
}

/* --------------------------------------------------------------------------
   5.1 游隼航电多普勒战术雷达 (Falcon Tactical Doppler Radar HUD) - 航电级高精重构
   -------------------------------------------------------------------------- */
.falcon-radar-wrap {
  width: 100%;
  max-width: 410px;
  margin: 0 auto 36px;
  position: relative;
  font-family: var(--font-mono);
  perspective: 1200px;
  user-select: none;
}

/* 航电复合机壳面板 (Aerospace Avionics Bezel) */
.radar-bezel {
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.94) 0%, rgba(241, 245, 249, 0.85) 100%);
  border: 1px solid var(--border-telemetry);
  border-radius: 26px;
  padding: 22px 20px 20px;
  box-shadow: 
    var(--shadow-telemetry),
    0 10px 40px -10px var(--mach-amber-glow),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s ease, border-color 0.35s ease;
  overflow: hidden;
}

[data-theme="dark"] .radar-bezel {
  background: linear-gradient(165deg, rgba(13, 20, 36, 0.92) 0%, rgba(5, 8, 16, 0.96) 100%);
  box-shadow: 
    var(--shadow-telemetry),
    0 12px 48px -8px rgba(255, 107, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.radar-bezel:hover {
  border-color: var(--mach-amber);
  box-shadow: 0 16px 52px -4px rgba(255, 107, 0, 0.4);
}

/* 机械 CNC 战术护角 (Tactical L-Bracket Corners) */
.radar-corner {
  position: absolute;
  width: 14px;
  height: 14px;
  pointer-events: none;
  z-index: 10;
}

.corner-tl { top: 10px; left: 10px; border-top: 2px solid var(--mach-amber); border-left: 2px solid var(--mach-amber); }
.corner-tr { top: 10px; right: 10px; border-top: 2px solid var(--mach-amber); border-right: 2px solid var(--mach-amber); }
.corner-bl { bottom: 10px; left: 10px; border-bottom: 2px solid var(--mach-amber); border-left: 2px solid var(--mach-amber); }
.corner-br { bottom: 10px; right: 10px; border-bottom: 2px solid var(--mach-amber); border-right: 2px solid var(--mach-amber); }

/* 机壳装配螺钉 */
.radar-screw {
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-muted);
  opacity: 0.5;
  pointer-events: none;
}
.screw-tl { top: 15px; left: 28px; }
.screw-tr { top: 15px; right: 28px; }
.screw-bl { bottom: 15px; left: 28px; }
.screw-br { bottom: 15px; right: 28px; }

/* 遥测状态条 */
.radar-telemetry-header,
.radar-telemetry-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  padding: 6px 12px;
  background: var(--bg-telemetry);
  border: 1px solid var(--border-telemetry);
  border-radius: 8px;
  position: relative;
  z-index: 5;
}

.radar-telemetry-header { margin-bottom: 16px; }
.radar-telemetry-footer { margin-top: 16px; }

.radar-live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #10b981;
  font-weight: 800;
}

.radar-live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: radarLivePulse 1.4s infinite ease-in-out;
}

@keyframes radarLivePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.65); }
}

.radar-freq-readout,
.radar-status-text {
  color: var(--mach-amber);
  font-weight: 800;
}

/* 雷达屏幕主镜盘 (Radar Scope / Lens Dish) */
.radar-dish {
  width: 290px;
  height: 290px;
  margin: 0 auto;
  border-radius: 50%;
  position: relative;
  overflow: hidden;
  border: 3px solid var(--mach-amber);
  background: radial-gradient(circle at center, rgba(255, 107, 0, 0.08) 0%, rgba(2, 132, 199, 0.09) 50%, var(--bg-void) 92%);
  box-shadow: 
    inset 0 0 35px rgba(0, 0, 0, 0.5),
    0 0 0 3px rgba(255, 107, 0, 0.15),
    0 0 25px var(--mach-amber-glow);
  cursor: crosshair;
}

/* 光学透镜凸面反光反光层 (Convex Optical Glass Reflection) */
.radar-glass-reflection {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: linear-gradient(
    135deg, 
    rgba(255, 255, 255, 0.4) 0%, 
    rgba(255, 255, 255, 0.12) 28%, 
    transparent 55%
  );
  pointer-events: none;
  z-index: 6;
  opacity: 0.85;
}

[data-theme="dark"] .radar-glass-reflection {
  background: linear-gradient(
    135deg, 
    rgba(255, 255, 255, 0.15) 0%, 
    rgba(255, 255, 255, 0.04) 28%, 
    transparent 55%
  );
}

/* 距离同心刻度环 (Concentric Distance Rings) */
.radar-range-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  pointer-events: none;
}

.ring-1 {
  width: 25%;
  height: 25%;
  border: 1px dashed rgba(255, 107, 0, 0.45);
}

.ring-2 {
  width: 50%;
  height: 50%;
  border: 1px solid rgba(255, 107, 0, 0.3);
}

.ring-3 {
  width: 75%;
  height: 75%;
  border: 1px dashed rgba(56, 189, 248, 0.4);
}

.ring-4 {
  width: 95%;
  height: 95%;
  border: 1px solid rgba(255, 107, 0, 0.35);
}

/* 距离文字微标 */
.ring-label {
  position: absolute;
  left: calc(50% + 4px);
  font-size: 0.55rem;
  font-weight: 700;
  color: var(--text-muted);
  opacity: 0.65;
  pointer-events: none;
}
.ring-label-1 { top: calc(50% - 38px); }
.ring-label-2 { top: calc(50% - 74px); }
.ring-label-3 { top: calc(50% - 110px); }

/* 极坐标网格线 */
.radar-grid-line {
  position: absolute;
  top: 50%;
  left: 50%;
  pointer-events: none;
}

.line-h {
  width: 100%;
  height: 1px;
  transform: translate(-50%, -50%);
  background: linear-gradient(90deg, transparent 4%, var(--border-hover) 50%, transparent 96%);
}

.line-v {
  height: 100%;
  width: 1px;
  transform: translate(-50%, -50%);
  background: linear-gradient(180deg, transparent 4%, var(--border-hover) 50%, transparent 96%);
}

.line-diag-1 {
  width: 100%;
  height: 1px;
  transform: translate(-50%, -50%) rotate(45deg);
  border-top: 1px dotted rgba(56, 189, 248, 0.22);
}

.line-diag-2 {
  width: 100%;
  height: 1px;
  transform: translate(-50%, -50%) rotate(-45deg);
  border-top: 1px dotted rgba(56, 189, 248, 0.22);
}

/* 360度罗盘多点方位角精密刻度 (Precision Compass Dial) */
.azimuth-dial {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  pointer-events: none;
}

.azimuth-tick {
  position: absolute;
  font-size: 0.55rem;
  font-weight: 800;
  color: var(--mach-amber);
  opacity: 0.85;
}

.tick-000 { top: 6px; left: 50%; transform: translateX(-50%); }
.tick-030 { top: 22px; right: 60px; }
.tick-060 { top: 62px; right: 20px; }
.tick-090 { top: 50%; right: 6px; transform: translateY(-50%); }
.tick-120 { bottom: 62px; right: 20px; }
.tick-150 { bottom: 22px; right: 60px; }
.tick-180 { bottom: 6px; left: 50%; transform: translateX(-50%); }
.tick-210 { bottom: 22px; left: 60px; }
.tick-240 { bottom: 62px; left: 20px; }
.tick-270 { top: 50%; left: 6px; transform: translateY(-50%); }
.tick-300 { top: 62px; left: 20px; }
.tick-330 { top: 22px; left: 60px; }

/* 360° 旋转双相雷达扫描波束与扇面余晖 (Radar Conic Sweep Beam) */
.radar-sweep-cone {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    transparent 0deg,
    transparent 260deg,
    rgba(255, 107, 0, 0.05) 280deg,
    rgba(255, 107, 0, 0.22) 345deg,
    rgba(255, 107, 0, 0.5) 358deg,
    rgba(255, 107, 0, 0.95) 360deg
  );
  animation: radarSweepRotate 3.6s linear infinite;
  pointer-events: none;
  z-index: 2;
}

.radar-sweep-lead {
  position: absolute;
  top: 0;
  left: 50%;
  width: 1.5px;
  height: 50%;
  background: linear-gradient(to top, rgba(255, 107, 0, 0.2), #ff6b00);
  box-shadow: 0 0 12px #ff6b00;
  transform-origin: bottom center;
}

@keyframes radarSweepRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 雷达探测到的全球节点信号回波 (Interactive Target Blips) */
.radar-target-blip {
  position: absolute;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.radar-target-blip:hover {
  transform: scale(1.18);
  z-index: 20;
}

.blip-core {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mach-amber);
  box-shadow: 0 0 10px var(--mach-amber);
  display: block;
}

.blip-wave {
  position: absolute;
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--mach-amber);
  border-radius: 50%;
  top: -5.5px;
  left: -5.5px;
  animation: blipEchoWave 2s infinite ease-out;
  pointer-events: none;
}

@keyframes blipEchoWave {
  0% { transform: scale(0.3); opacity: 1; }
  100% { transform: scale(2.4); opacity: 0; }
}

.blip-tag {
  font-size: 0.62rem;
  font-weight: 800;
  color: var(--text-main);
  background: var(--bg-card);
  border: 1px solid var(--border-hover);
  padding: 1px 6px;
  border-radius: 4px;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: all 0.2s ease;
}

.radar-target-blip:hover .blip-tag {
  background: var(--mach-gradient);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 14px var(--mach-amber-glow);
}

/* 节点悬停交互扩展提示窗 (Interactive Node Tooltip) */
.blip-tooltip {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  opacity: 0;
  pointer-events: none;
  background: var(--bg-primary);
  border: 1px solid var(--mach-amber);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-main);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  white-space: nowrap;
  transition: all 0.2s ease;
  z-index: 30;
}

.radar-target-blip:hover .blip-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* 节点在雷达盘上的真实方位映射 */
.blip-hkg { top: 38%; left: 58%; }
.blip-tyo { top: 22%; left: 68%; }
.blip-sgp { top: 70%; left: 52%; }
.blip-sfo { top: 32%; left: 16%; }

/* 中心战术锁定准星 */
.radar-center-lock {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 24px;
  height: 24px;
  z-index: 3;
  pointer-events: none;
}

.center-target-box {
  width: 100%;
  height: 100%;
  border: 1.5px solid var(--mach-amber);
  box-shadow: 0 0 10px var(--mach-amber);
  animation: centerTargetGlow 2s infinite ease-in-out;
}

.center-cross-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 4px;
  height: 4px;
  background: var(--mach-amber);
  border-radius: 50%;
}

@keyframes centerTargetGlow {
  0%, 100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.15); opacity: 0.6; }
}

/* 点击声呐冲击脉冲动画 (Click Sonar Ripple) */
.radar-click-ripple {
  position: absolute;
  border-radius: 50%;
  border: 2px solid var(--mach-amber);
  background: rgba(255, 107, 0, 0.15);
  pointer-events: none;
  z-index: 4;
  animation: radarRippleExpand 0.7s cubic-bezier(0.1, 0.8, 0.3, 1) forwards;
}

@keyframes radarRippleExpand {
  0% { width: 0; height: 0; opacity: 1; transform: translate(-50%, -50%) scale(0.2); }
  100% { width: 340px; height: 340px; opacity: 0; transform: translate(-50%, -50%) scale(1.4); }
}

.hero-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: 9999px;
  background: rgba(255, 107, 0, 0.08);
  border: 1px solid rgba(255, 107, 0, 0.3);
  color: var(--mach-amber);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 22px;
  white-space: nowrap;
  word-break: keep-all;
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
  color: var(--text-main);
}

.hero-title .brand-highlight {
  background: var(--mach-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  position: relative;
}

.hero-subtitle {
  font-size: 1.22rem;
  color: var(--text-sub);
  max-width: 820px;
  margin: 0 auto 36px;
  line-height: 1.75;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 50px;
}

/* 俯冲遥测仪表条 (Peregrine Falcon Telemetry Bar) */
.telemetry-dashboard {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 1040px;
  margin: 0 auto;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-radius: 16px;
  box-shadow: var(--shadow-telemetry);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  position: relative;
}

.telemetry-item {
  text-align: left;
  border-left: 3px solid var(--mach-amber);
  padding-left: 14px;
}

.telemetry-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 4px;
}

.telemetry-value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.telemetry-value .unit {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--mach-amber);
  margin-left: 2px;
}

.telemetry-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* --------------------------------------------------------------------------
   6. 气动羽翼副翼 (Air-Brake Feather Telemetry Cards)
   -------------------------------------------------------------------------- */
.section {
  padding: 85px 0;
  position: relative;
}

.section-alt {
  background: var(--bg-primary);
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--mach-amber);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text-main);
}

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

/* 3个核心优势卡片：游隼副翼展开动效 */
.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  perspective: 1000px;
}

.feather-vane-card {
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-radius: 16px;
  padding: 36px 30px;
  position: relative;
  transition: var(--transition-spring);
  transform-style: preserve-3d;
  box-shadow: var(--shadow-telemetry);
  display: flex;
  flex-direction: column;
}

/* 悬停展开羽翼减速板 (Air-Brake Feather Deployment) */
.feather-vane-card:hover {
  transform: translateY(-8px) rotateX(2deg) rotateY(-3deg);
  border-color: var(--mach-amber);
  box-shadow: var(--shadow-hover);
}

.vane-number {
  position: absolute;
  top: 24px;
  right: 28px;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--border-telemetry);
  opacity: 0.6;
}

.vane-icon-box {
  width: 58px;
  height: 58px;
  border-radius: 12px;
  background: rgba(255, 107, 0, 0.1);
  color: var(--mach-amber);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  border: 1px solid rgba(255, 107, 0, 0.25);
}

.vane-icon-box svg {
  width: 28px;
  height: 28px;
}

.feather-vane-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-main);
}

.feather-vane-card p {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.7;
}

.telemetry-route-specs {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed var(--border-telemetry);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--text-telemetry);
}

.route-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.route-val {
  color: var(--mach-amber);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   7. 流媒体与 AI 支持专属图卡 (Showcase)
   -------------------------------------------------------------------------- */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.showcase-vane {
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-radius: 18px;
  padding: 42px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-telemetry);
  transition: var(--transition-normal);
}

.showcase-vane:hover {
  transform: translateY(-6px);
  border-color: var(--mach-amber);
  box-shadow: var(--shadow-hover);
}

.showcase-header-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 9999px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 18px;
}

.pill-stream {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.pill-ai {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.showcase-vane h3 {
  font-size: 1.65rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-main);
}

.showcase-vane p {
  color: var(--text-sub);
  font-size: 0.98rem;
  line-height: 1.7;
  margin-bottom: 26px;
}

.platform-chips-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.aero-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--bg-telemetry);
  border: 1px solid var(--border-telemetry);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
}

.aero-chip-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-netflix { background-color: #e50914; }
.dot-disney { background-color: #113ccf; }
.dot-youtube { background-color: #ff0000; }
.dot-chatgpt { background-color: #10a37f; }
.dot-claude { background-color: #d97706; }
.dot-midjourney { background-color: #3b82f6; }

.telemetry-highlight-box {
  background: var(--bg-telemetry);
  border-radius: 10px;
  padding: 16px 20px;
  border-left: 4px solid var(--mach-amber);
  font-size: 0.92rem;
  color: var(--text-sub);
}

/* --------------------------------------------------------------------------
   8. 真实市场套餐价格对比表 (Realistic Pricing Section)
   -------------------------------------------------------------------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-radius: 18px;
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-telemetry);
}

.price-card:hover {
  transform: translateY(-6px);
  border-color: var(--mach-amber);
  box-shadow: var(--shadow-hover);
}

/* 旗舰高亮卡片 */
.price-card.featured {
  border-color: var(--mach-amber);
  box-shadow: 0 8px 36px var(--mach-amber-glow);
  transform: scale(1.03);
}

.price-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.featured-ribbon {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--mach-gradient);
  color: #ffffff;
  padding: 4px 18px;
  border-radius: 9999px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 14px var(--mach-amber-glow);
  white-space: nowrap;
  word-break: keep-all;
  z-index: 10;
}

.plan-head {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-telemetry);
  margin-bottom: 24px;
}

.plan-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--mach-amber);
  text-transform: uppercase;
}

.plan-name {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--text-main);
  margin: 6px 0;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.plan-price-box {
  margin: 18px 0 10px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-cur {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
}

.price-num {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text-main);
}

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

.price-discount-note {
  font-size: 0.8rem;
  color: var(--mach-amber);
  font-weight: 600;
}

.plan-features-list {
  margin-bottom: 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.plan-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-sub);
}

.plan-features-list li svg {
  width: 18px;
  height: 18px;
  color: #10b981;
  flex-shrink: 0;
  margin-top: 2px;
}

.plan-features-list li.disabled {
  color: var(--text-muted);
  opacity: 0.6;
}

.plan-features-list li.disabled svg {
  color: var(--text-muted);
}

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

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-radius: 16px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-telemetry);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: var(--mach-amber);
  box-shadow: var(--shadow-hover);
}

.review-stars {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 16px;
}

.review-stars svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 24px;
}

.reviewer-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-telemetry);
  padding-top: 18px;
}

.reviewer-callsign {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--mach-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.05rem;
}

.reviewer-meta h4 {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-main);
}

.reviewer-meta p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition-fast);
}

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

.faq-question {
  width: 100%;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  border: none;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  text-align: left;
  cursor: pointer;
}

.faq-icon {
  width: 22px;
  height: 22px;
  color: var(--text-muted);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--mach-amber);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 26px;
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 240px;
  padding: 0 26px 22px;
}

/* --------------------------------------------------------------------------
   11. 页脚：严格规范的 4 个入口 (Footer)
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-telemetry);
  padding: 48px 0 36px;
  text-align: center;
  margin-top: 60px;
}

.footer-nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.footer-nav-list a {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-sub);
  position: relative;
  padding: 4px 0;
}

.footer-nav-list a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--mach-amber);
  transition: width 0.25s ease;
}

.footer-nav-list a:hover {
  color: var(--mach-amber);
}

.footer-nav-list a:hover::after {
  width: 100%;
}

.footer-copy {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-domain {
  font-weight: 700;
  color: var(--text-main);
}

/* --------------------------------------------------------------------------
   12. 推荐资讯与独立子页排版 (Articles & Docs)
   -------------------------------------------------------------------------- */
.news-header {
  padding: 70px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-telemetry);
  background: var(--bg-primary);
}

.news-header h1 {
  font-size: 2.6rem;
  font-weight: 900;
  margin-bottom: 12px;
}

.news-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin: 50px 0 70px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-radius: 16px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-telemetry);
  transition: var(--transition-fast);
}

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

.article-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--mach-amber);
  margin-bottom: 14px;
}

.article-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
  line-height: 1.45;
}

.article-card p {
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.65;
  margin-bottom: 20px;
}

/* --------------------------------------------------------------------------
   13. 移动端完美单栏与手指友好响应式适配 (@media)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.7rem; }
  .telemetry-dashboard { grid-template-columns: repeat(2, 1fr); }
  .cards-grid-3, .pricing-grid, .reviews-grid, .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links { display: none; } /* 移动端保全屏精简秒开 */
  .gforce-dial-header { display: none; }

  .hero-section { padding: 48px 0 36px; }
  .hero-title { font-size: 2.1rem; }
  .hero-subtitle { font-size: 1.02rem; }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 48px; /* 符合手指触控标准 */
  }

  .telemetry-dashboard {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    padding: 16px;
  }

  .telemetry-value { font-size: 1.4rem; }

  /* 严格单栏化适配 */
  .cards-grid-3,
  .showcase-grid,
  .pricing-grid,
  .reviews-grid,
  .articles-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .price-card.featured {
    transform: none;
  }
  .price-card.featured:hover {
    transform: translateY(-6px);
  }

  .footer-nav-list {
    flex-direction: column;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.85rem; }
  .falcon-radar-wrap { max-width: 300px; }
  .radar-dish { width: 220px; height: 220px; }
  .featured-ribbon { font-size: 0.72rem; padding: 3px 12px; }
  .hero-status-pill { font-size: 0.75rem; padding: 4px 12px; }
}

/* ==========================================================================
   14. 深度 SEO 文章排版规范 (Long-form Technical Articles System)
   ========================================================================== */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumbs a {
  color: var(--text-sub);
}

.breadcrumbs a:hover {
  color: var(--mach-amber);
}

.breadcrumbs .sep {
  opacity: 0.4;
}

.article-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.article-header {
  border-bottom: 1px solid var(--border-telemetry);
  padding-bottom: 30px;
  margin-bottom: 36px;
}

.article-header h1 {
  font-size: 2.3rem;
  font-weight: 900;
  line-height: 1.35;
  color: var(--text-main);
  margin: 14px 0 18px;
  letter-spacing: -0.02em;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.article-meta-bar span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 目录系统 (Table of Contents) */
.article-toc {
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-left: 4px solid var(--mach-amber);
  border-radius: 14px;
  padding: 24px 28px;
  margin-bottom: 40px;
  box-shadow: var(--shadow-telemetry);
}

.article-toc-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-toc ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-left: 4px;
}

.article-toc li {
  font-size: 0.95rem;
  color: var(--text-sub);
}

.article-toc li a {
  color: var(--text-sub);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-fast);
}

.article-toc li a:hover {
  color: var(--mach-amber);
  transform: translateX(4px);
}

.article-toc li.sub-item {
  padding-left: 20px;
  font-size: 0.88rem;
  opacity: 0.9;
}

/* 正文深度排版 */
.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-sub);
}

.article-body h2 {
  font-size: 1.65rem;
  font-weight: 900;
  color: var(--text-main);
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-telemetry);
  scroll-margin-top: 90px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h2::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 24px;
  background: var(--mach-amber);
  border-radius: 3px;
}

.article-body h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 32px 0 16px;
  scroll-margin-top: 90px;
}

.article-body p {
  margin-bottom: 22px;
}

.article-body ul, .article-body ol {
  margin: 0 0 24px 24px;
}

.article-body li {
  margin-bottom: 10px;
  line-height: 1.75;
}

.article-body strong {
  color: var(--text-main);
}

.article-body a.inline-link {
  color: var(--mach-amber);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body a.inline-link:hover {
  color: #ea580c;
}

/* 警示与提示框 */
.callout-box {
  background: var(--bg-telemetry);
  border: 1px solid var(--border-telemetry);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 28px 0;
  font-size: 0.96rem;
}

.callout-box.tip {
  border-left: 4px solid var(--mach-amber);
}

.callout-box.info {
  border-left: 4px solid var(--mach-cyan);
}

.callout-box h4 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 技术对比表格 */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-radius: 10px;
  overflow: hidden;
}

.spec-table th {
  background: var(--bg-telemetry);
  padding: 14px 18px;
  font-weight: 800;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-telemetry);
}

.spec-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-telemetry);
  color: var(--text-sub);
}

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

/* 文章内置 CTA 横幅 */
.article-cta-card {
  background: var(--bg-card);
  border: 1.5px solid var(--mach-amber);
  border-radius: 16px;
  padding: 36px 30px;
  text-align: center;
  margin: 48px 0;
  box-shadow: 0 10px 30px var(--mach-amber-glow);
}

.article-cta-card h3 {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 12px;
}

.article-cta-card p {
  color: var(--text-muted);
  font-size: 0.98rem;
  margin-bottom: 22px;
}

/* FAQ 模块 */
.article-faq-section {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid var(--border-telemetry);
}

.article-faq-section h2 {
  font-size: 1.65rem;
  font-weight: 900;
  margin-bottom: 24px;
}

.faq-card-item {
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-radius: 12px;
  padding: 22px 24px;
  margin-bottom: 18px;
}

.faq-card-q {
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.faq-card-a {
  font-size: 0.96rem;
  color: var(--text-sub);
  line-height: 1.75;
}

/* 相关阅读模块 */
.related-reads-section {
  margin-top: 60px;
  padding-top: 36px;
  border-top: 1px solid var(--border-telemetry);
}

.related-reads-section h2 {
  font-size: 1.55rem;
  font-weight: 900;
  margin-bottom: 24px;
  color: var(--text-main);
}

.related-reads-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-fast);
}

.related-card:hover {
  transform: translateY(-4px);
  border-color: var(--mach-amber);
  box-shadow: var(--shadow-telemetry);
}

.related-card-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--mach-amber);
  margin-bottom: 8px;
}

.related-card h4 {
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 12px;
}

.related-card a {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--mach-amber);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

@media (max-width: 768px) {
  .related-reads-grid {
    grid-template-columns: 1fr;
  }
  .article-header h1 {
    font-size: 1.85rem;
  }
  .article-container {
    padding: 24px 16px 60px;
  }
}

/* --------------------------------------------------------------------------
   14. 网站地图 (Sitemap) 与法律/关于合规页面 (Legal & Doc Layout)
   -------------------------------------------------------------------------- */
.legal-page-header {
  padding: 130px 0 46px;
  background: linear-gradient(180deg, var(--bg-void) 0%, var(--bg-primary) 100%);
  border-bottom: 1px solid var(--border-telemetry);
  text-align: center;
  position: relative;
  z-index: 2;
}

.legal-page-header h1 {
  font-size: 2.3rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.legal-page-header p {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

.legal-content-wrap {
  padding-top: 36px;
  padding-bottom: 80px;
  max-width: 980px;
}

.back-home-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--mach-amber);
  margin-bottom: 28px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-radius: 999px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: var(--transition-fast);
}

.back-home-link:hover {
  transform: translateX(-4px);
  border-color: var(--mach-amber);
  box-shadow: 0 4px 14px var(--mach-amber-glow);
}

.doc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-radius: 18px;
  padding: 42px 48px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-telemetry);
}

.doc-section {
  margin-bottom: 38px;
}

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

.doc-section h2 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-telemetry);
  display: flex;
  align-items: center;
  gap: 8px;
}

.doc-section p {
  font-size: 0.98rem;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 16px;
}

.doc-section ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: 18px;
}

.doc-section ul li {
  position: relative;
  padding-left: 20px;
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 10px;
}

.doc-section ul li::before {
  content: "•";
  position: absolute;
  left: 4px;
  top: 0;
  color: var(--mach-amber);
  font-weight: 900;
  font-size: 1.2rem;
}

.highlight-box {
  background: rgba(255, 107, 0, 0.06);
  border-left: 4px solid var(--mach-amber);
  padding: 16px 20px;
  border-radius: 0 10px 10px 0;
  margin: 18px 0;
}

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

/* 网站地图网格 (Sitemap Grid) */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.sitemap-card {
  background: var(--bg-card);
  border: 1px solid var(--border-telemetry);
  border-radius: 16px;
  padding: 28px 30px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-telemetry);
  transition: var(--transition-fast);
}

.sitemap-card:hover {
  transform: translateY(-3px);
  border-color: var(--mach-amber);
  box-shadow: var(--shadow-hover);
}

.sitemap-card-wide {
  grid-column: 1 / -1;
}

.sitemap-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-telemetry);
  display: flex;
  align-items: center;
  gap: 8px;
}

.sitemap-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sitemap-card li {
  margin-bottom: 12px;
}

.sitemap-card li:last-child {
  margin-bottom: 0;
}

.sitemap-card a {
  font-size: 0.94rem;
  color: var(--text-sub);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  line-height: 1.5;
  transition: var(--transition-fast);
}

.sitemap-card a:hover {
  color: var(--mach-amber);
  transform: translateX(4px);
}

@media (max-width: 768px) {
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
  .sitemap-card-wide {
    grid-column: auto;
  }
  .doc-card {
    padding: 26px 20px;
  }
}