/* ===================================================================
   猫猫云 (maomaoyun.cyou) - 战术核心样式表
   设计规范：STYLE ㊽ — MECHA ANIME HUD
   视觉基调：机甲驾驶舱 HUD / 战术指挥系统 / 机械工程美学 / 任务控制中心
   =================================================================== */

:root {
  /* 基础色盘 (Gunmetal & Graphite Base) */
  --hud-bg-darkest: #0a0d14;
  --hud-bg-gunmetal: #10141e;
  --hud-bg-graphite: #181f2c;
  --hud-bg-panel: rgba(20, 26, 38, 0.88);
  --hud-bg-panel-elevated: #1e2638;
  --hud-bg-subtle: rgba(30, 41, 59, 0.6);

  /* 边框与线框色 */
  --hud-border-dim: #263348;
  --hud-border-bright: #3b4e6d;
  --hud-border-highlight: #00f0ff;

  /* 文字系统 (Off-white / Tactical Grey) */
  --hud-text-bright: #f8fafc;
  --hud-text-normal: #cbd5e1;
  --hud-text-muted: #8494ab;
  --hud-text-dim: #4b5d78;

  /* 战术状态色 (Strict Rules) */
  --hud-orange: #f97316;       /* CTA & Active Status */
  --hud-orange-glow: rgba(249, 115, 22, 0.35);
  --hud-yellow: #eab308;       /* Important / Highlight stats */
  --hud-yellow-glow: rgba(234, 179, 8, 0.3);
  --hud-blue: #00f0ff;         /* System Information / Radar / Telemetry */
  --hud-blue-deep: #0284c7;
  --hud-blue-glow: rgba(0, 240, 255, 0.25);
  --hud-red: #ef4444;          /* Warning / Urgency */
  --hud-red-glow: rgba(239, 68, 68, 0.3);
  --hud-green: #10b981;        /* Online Status */

  /* 几何切角参数 (Diagonal Chamfers) */
  --cut-sm: 8px;
  --cut-md: 14px;
  --cut-lg: 20px;

  /* 字体栈：系统等宽与现代非衬线字体混编 */
  --font-stack-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-stack-mono: ui-monospace, "SF Mono", "Cascadia Code", "Segoe UI Mono", "Liberation Mono", Menlo, Consolas, monospace;

  /* 容器宽度 */
  --container-max: 1220px;
  --article-max: 860px;
  --transition-fast: 0.16s cubic-bezier(0.2, 0, 0, 1);
  --transition-normal: 0.24s cubic-bezier(0.2, 0, 0, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack-sans);
  background-color: var(--hud-bg-darkest);
  color: var(--hud-text-normal);
  line-height: 1.65;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  background-image:
    linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px),
    radial-gradient(ellipse at 50% 0%, rgba(16, 26, 46, 0.8) 0%, transparent 70%);
  background-size: 32px 32px, 32px 32px, 100% 100%;
}

/* 屏幕扫描线微纹理 (Subtle Scanline Overlay) */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.15),
    rgba(0, 0, 0, 0.15) 1px,
    transparent 1px,
    transparent 2px
  );
  pointer-events: none;
  z-index: 999;
  opacity: 0.6;
}

/* 链接基础样式 */
a {
  color: var(--hud-blue);
  text-decoration: none;
  transition: all var(--transition-fast);
}

a:hover {
  color: var(--hud-orange);
  text-shadow: 0 0 8px var(--hud-orange-glow);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* 布局容器 */
.site-container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.article-container {
  width: 100%;
  max-width: var(--article-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 顶部机甲驾驶舱系统导航 (Cockpit HUD Navigation) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(16, 20, 30, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--hud-border-dim);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--hud-blue) 25%, var(--hud-orange) 50%, var(--hud-blue) 75%, transparent 100%);
  opacity: 0.7;
}

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

/* 品牌 Logo - 机甲作战代号质感 */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--hud-text-bright);
}

.brand-emblem {
  position: relative;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--hud-bg-graphite) 0%, var(--hud-bg-gunmetal) 100%);
  border: 1px solid var(--hud-blue);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--hud-blue);
  box-shadow: inset 0 0 8px var(--hud-blue-glow);
}

.brand-emblem::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 4px;
  height: 4px;
  background-color: var(--hud-orange);
  box-shadow: 0 0 6px var(--hud-orange);
}

.brand-code {
  font-family: var(--font-stack-mono);
  font-size: 0.75rem;
  color: var(--hud-text-muted);
  display: block;
  letter-spacing: 0.1em;
  line-height: 1;
}

/* 导航菜单项 */
.main-nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-link {
  font-family: var(--font-stack-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--hud-text-muted);
  padding: 8px 12px;
  position: relative;
  letter-spacing: 0.06em;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.nav-link::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0%;
  height: 2px;
  background-color: var(--hud-orange);
  transition: width var(--transition-fast);
  box-shadow: 0 0 6px var(--hud-orange);
}

.nav-link:hover, .nav-link.is-active {
  color: var(--hud-text-bright);
  background-color: rgba(249, 115, 22, 0.08);
  border-color: rgba(249, 115, 22, 0.3);
}

.nav-link:hover::before, .nav-link.is-active::before {
  width: 80%;
}

.mobile-menu-toggle {
  display: none;
  padding: 8px;
  color: var(--hud-blue);
  border: 1px solid var(--hud-border-dim);
  background-color: var(--hud-bg-graphite);
}

.mobile-nav-drawer {
  display: none;
  background-color: var(--hud-bg-gunmetal);
  border-bottom: 2px solid var(--hud-border-bright);
  padding: 20px;
}

.mobile-nav-drawer.is-open {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ===================================================================
   战术切角按钮规范 (Tactical Chamfered CTA Engine)
   STATIC: 矩形切角、双层 Border、左侧 Status Light、右侧 Arrow
   HOVER: Status Light 快速闪烁、Border 扫描一圈、Orange Fill、Arrow 位移、机械震动
   =================================================================== */

.tactical-cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 24px;
  font-family: var(--font-stack-mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--hud-text-bright) !important;
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.2) 0%, rgba(20, 26, 38, 0.9) 100%);
  border: 1px solid var(--hud-orange);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), transform 0.08s ease;
  user-select: none;
  box-shadow: 0 0 12px rgba(249, 115, 22, 0.25);
}

/* 双层边框伪元素 */
.tactical-cta::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  right: 2px;
  bottom: 2px;
  border: 1px dashed rgba(255, 255, 255, 0.25);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  pointer-events: none;
}

/* 左侧 Status Light 指示灯 */
.tactical-status-light {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--hud-green);
  box-shadow: 0 0 8px var(--hud-green);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

/* 右侧战术 Arrow */
.tactical-arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
  color: var(--hud-orange);
}

.tactical-arrow svg {
  width: 14px;
  height: 14px;
}

/* CTA HOVER 状态：机械震动与快速闪烁 */
.tactical-cta:hover {
  background: var(--hud-orange);
  color: #000000 !important;
  border-color: #ffffff;
  box-shadow: 0 0 20px rgba(249, 115, 22, 0.7);
  animation: mechanicalJitter 0.12s infinite alternate;
}

.tactical-cta:hover .tactical-status-light {
  background-color: #ffffff;
  box-shadow: 0 0 10px #ffffff;
  animation: statusFlicker 0.1s infinite alternate;
}

.tactical-cta:hover .tactical-arrow {
  color: #000000;
  transform: translateX(4px);
}

@keyframes mechanicalJitter {
  0% { transform: translate(0, 0); }
  50% { transform: translate(1px, -1px); }
  100% { transform: translate(-1px, 1px); }
}

@keyframes statusFlicker {
  0% { opacity: 0.2; }
  100% { opacity: 1; }
}

/* 次要战术按钮 (蓝光系统查看) */
.tactical-secondary-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  font-family: var(--font-stack-mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--hud-blue) !important;
  background: rgba(16, 20, 30, 0.8);
  border: 1px solid var(--hud-blue);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: all var(--transition-fast);
}

.tactical-secondary-cta:hover {
  background: rgba(0, 240, 255, 0.15);
  border-color: #ffffff;
  box-shadow: 0 0 14px var(--hud-blue-glow);
  transform: translateY(-1px);
}

/* ===================================================================
   HERO 区域：机甲驾驶舱全景与核心机体 (Mecha Cockpit Hero)
   左：巨大标题 + 简报 + 启动系统 CTA
   右：核心机甲网络动力炉 (Product / Machine) 周围环绕 TARGET/SYSTEM/POWER/STATUS/MISSION
   =================================================================== */

.hero-section {
  padding: 64px 0 72px;
  position: relative;
  border-bottom: 2px solid var(--hud-border-dim);
  background: radial-gradient(circle at 75% 40%, rgba(0, 240, 255, 0.08) 0%, transparent 60%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 48px;
  align-items: center;
}

/* 顶部战术识别标签 */
.hero-mission-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-stack-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--hud-yellow);
  background: rgba(234, 179, 8, 0.12);
  border: 1px solid var(--hud-yellow);
  padding: 4px 14px;
  margin-bottom: 22px;
  letter-spacing: 0.12em;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}

.hero-mission-tag .radar-blip {
  width: 6px;
  height: 6px;
  background-color: var(--hud-yellow);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--hud-yellow);
  animation: statusFlicker 0.6s infinite alternate;
}

/* 巨大标题 */
.hero-title {
  font-size: 2.85rem;
  line-height: 1.2;
  font-weight: 900;
  color: var(--hud-text-bright);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  text-shadow: 0 0 24px rgba(0, 240, 255, 0.15);
}

.hero-title .title-accent {
  color: var(--hud-orange);
  position: relative;
}

.hero-subtitle {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--hud-text-normal);
  margin-bottom: 36px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

/* 底部系统状态跑马遥测 */
.hero-telemetry-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  padding: 12px 16px;
  background: rgba(16, 20, 30, 0.6);
  border: 1px solid var(--hud-border-dim);
  font-family: var(--font-stack-mono);
  font-size: 0.8rem;
}

.telemetry-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.telemetry-label {
  color: var(--hud-text-muted);
}

.telemetry-value {
  color: var(--hud-blue);
  font-weight: 700;
}

/* 右侧核心战术机体 (Core Mecha Unit) 周围环绕 HUD 标签 */
.mecha-core-hud {
  position: relative;
  background: var(--hud-bg-panel);
  border: 1px solid var(--hud-border-bright);
  padding: 28px;
  clip-path: polygon(16px 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%, 0 16px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6), inset 0 0 20px rgba(0, 240, 255, 0.05);
}

/* 四角机械固定卡榫标记 (HUD Frame Corner Brackets) */
.hud-corner {
  position: absolute;
  width: 12px;
  height: 12px;
  border: 2px solid var(--hud-blue);
  pointer-events: none;
}

.hud-corner-tl { top: 4px; left: 4px; border-right: none; border-bottom: none; }
.hud-corner-tr { top: 4px; right: 4px; border-left: none; border-bottom: none; }
.hud-corner-bl { bottom: 4px; left: 4px; border-right: none; border-top: none; }
.hud-corner-br { bottom: 4px; right: 4px; border-left: none; border-top: none; }

/* 环绕 HUD 战术标签 (TARGET / SYSTEM / POWER / STATUS / MISSION) */
.hud-tag-float {
  position: absolute;
  font-family: var(--font-stack-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 2px 8px;
  background-color: var(--hud-bg-darkest);
  border: 1px solid var(--hud-blue);
  color: var(--hud-blue);
  z-index: 5;
}

.hud-tag-target  { top: -12px; left: 28px; border-color: var(--hud-red); color: var(--hud-red); }
.hud-tag-system  { top: -12px; right: 28px; }
.hud-tag-power   { bottom: -12px; left: 28px; border-color: var(--hud-yellow); color: var(--hud-yellow); }
.hud-tag-status  { bottom: -12px; right: 28px; border-color: var(--hud-green); color: var(--hud-green); }
.hud-tag-mission { top: 50%; right: -16px; transform: translateY(-50%) rotate(90deg); border-color: var(--hud-orange); color: var(--hud-orange); }

/* 雷达与动力机体展示盘 (Radar Sweep & Machine Visualization) */
.radar-cockpit-view {
  position: relative;
  width: 100%;
  height: 260px;
  background: radial-gradient(circle at 50% 50%, #152238 0%, #0d131f 75%);
  border: 1px solid var(--hud-border-dim);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

/* 同心圆雷达网格 */
.radar-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px dashed rgba(0, 240, 255, 0.2);
}
.radar-ring-1 { width: 80px; height: 80px; }
.radar-ring-2 { width: 160px; height: 160px; }
.radar-ring-3 { width: 230px; height: 230px; }

/* 雷达十字瞄准线 */
.radar-crosshair-x {
  position: absolute;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.4), transparent);
}
.radar-crosshair-y {
  position: absolute;
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, transparent, rgba(0, 240, 255, 0.4), transparent);
}

/* 动态雷达扫描动画 (Radar Sweep) */
.radar-sweep-beam {
  position: absolute;
  width: 120px;
  height: 120px;
  top: 50%;
  left: 50%;
  transform-origin: 0 0;
  background: conic-gradient(from 0deg, rgba(0, 240, 255, 0.5) 0deg, transparent 60deg);
  animation: radarRotate 4s linear infinite;
  pointer-events: none;
}

@keyframes radarRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* 核心网络机体 (Product Machine Core) */
.core-machine-icon {
  position: relative;
  z-index: 2;
  width: 90px;
  height: 90px;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  border: 2px solid var(--hud-blue);
  box-shadow: 0 0 24px var(--hud-blue-glow);
  clip-path: polygon(25% 0%, 75% 0%, 100% 25%, 100% 75%, 75% 100%, 25% 100%, 0% 75%, 0% 25%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.core-machine-icon svg {
  width: 44px;
  height: 44px;
  color: var(--hud-blue);
  animation: pulseGlow 2s ease-in-out infinite alternate;
}

@keyframes pulseGlow {
  0% { filter: drop-shadow(0 0 4px var(--hud-blue)); transform: scale(0.96); }
  100% { filter: drop-shadow(0 0 14px var(--hud-orange)); transform: scale(1.04); }
}

/* 节点线路战术选择切换 */
.hud-console-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}

.hud-console-tab {
  font-family: var(--font-stack-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--hud-text-muted);
  background-color: var(--hud-bg-darkest);
  border: 1px solid var(--hud-border-dim);
  padding: 8px 4px;
  text-align: center;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
  transition: all var(--transition-fast);
}

.hud-console-tab.is-active {
  color: var(--hud-text-bright);
  background-color: rgba(249, 115, 22, 0.2);
  border-color: var(--hud-orange);
  box-shadow: 0 0 10px rgba(249, 115, 22, 0.3);
}

/* 遥测信息看板 */
.telemetry-readout-box {
  background: var(--hud-bg-darkest);
  border: 1px solid var(--hud-border-dim);
  padding: 16px;
  margin-bottom: 16px;
}

.readout-node-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--hud-text-bright);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.readout-node-desc {
  font-size: 0.8rem;
  color: var(--hud-text-muted);
  margin-bottom: 10px;
}

.readout-metric-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-top: 1px solid var(--hud-border-dim);
  padding-top: 8px;
}

.readout-ping-value {
  font-family: var(--font-stack-mono);
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--hud-green);
  text-shadow: 0 0 10px rgba(16, 185, 129, 0.4);
}

/* 分段式能量进度条 (Segmented Load Bar) */
.segmented-meter {
  display: flex;
  gap: 4px;
  height: 6px;
  margin-top: 6px;
}

.meter-block {
  flex: 1;
  background-color: var(--hud-border-dim);
}

.meter-block.is-filled {
  background-color: var(--hud-blue);
  box-shadow: 0 0 4px var(--hud-blue);
}

.meter-block.is-orange {
  background-color: var(--hud-orange);
  box-shadow: 0 0 4px var(--hud-orange);
}

/* ===================================================================
   通用任务简报区块头 (Mission Briefing Section Header)
   SYSTEM 01 → SYSTEM 02 → SYSTEM 03
   =================================================================== */

.section-block {
  padding: 80px 0;
  border-bottom: 1px solid var(--hud-border-dim);
  position: relative;
}

.mission-brief-head {
  text-align: left;
  max-width: 800px;
  margin-bottom: 48px;
  position: relative;
  padding-left: 20px;
  border-left: 4px solid var(--hud-blue);
}

.mission-system-code {
  font-family: var(--font-stack-mono);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--hud-blue);
  letter-spacing: 0.16em;
  margin-bottom: 8px;
}

.mission-brief-title {
  font-size: 2.15rem;
  font-weight: 800;
  color: var(--hud-text-bright);
  line-height: 1.25;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.mission-brief-desc {
  font-size: 1rem;
  color: var(--hud-text-normal);
  line-height: 1.7;
}

/* ===================================================================
   CARDS 规范：HUD Panels / Technical Modules
   每个 Feature：[01] SYSTEM POWER / 描述 / STATUS: ONLINE
   MICRO INTERACTION: Hover Card → Target Lock (高亮与瞄准线收缩)
   =================================================================== */

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.hud-panel-card {
  position: relative;
  background: var(--hud-bg-panel);
  border: 1px solid var(--hud-border-dim);
  padding: 28px 24px 22px;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  transition: all var(--transition-normal);
}

.hud-panel-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: var(--hud-blue);
  transition: width var(--transition-normal);
}

/* Target Lock Hover 交互 */
.hud-panel-card:hover {
  transform: translateY(-4px);
  border-color: var(--hud-blue);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.7), 0 0 16px var(--hud-blue-glow);
}

.hud-panel-card:hover::before {
  width: 100%;
  background-color: var(--hud-orange);
  box-shadow: 0 0 8px var(--hud-orange);
}

.hud-panel-num {
  font-family: var(--font-stack-mono);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--hud-blue);
  margin-bottom: 12px;
}

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

.hud-panel-desc {
  font-size: 0.925rem;
  color: var(--hud-text-normal);
  line-height: 1.65;
  margin-bottom: 20px;
}

.hud-panel-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--hud-border-dim);
  padding-top: 12px;
  font-family: var(--font-stack-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--hud-green);
}

.hud-panel-status .status-led {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--hud-green);
  box-shadow: 0 0 6px var(--hud-green);
}

/* ===================================================================
   流媒体与 AI 战术模块 (Media & AI Tactical Modules)
   =================================================================== */

.tactical-media-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.tactical-media-box {
  background: var(--hud-bg-panel);
  border: 1px solid var(--hud-border-dim);
  padding: 32px;
  position: relative;
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.tactical-media-box:hover {
  border-color: var(--hud-blue);
  box-shadow: 0 0 18px var(--hud-blue-glow);
}

.tactical-media-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.tactical-media-tag {
  font-family: var(--font-stack-mono);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--hud-blue);
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid var(--hud-blue);
  padding: 3px 10px;
}

.tactical-media-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--hud-text-bright);
}

.tactical-media-desc {
  font-size: 0.95rem;
  color: var(--hud-text-normal);
  line-height: 1.7;
  margin-bottom: 24px;
}

.tactical-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tactical-chip {
  font-family: var(--font-stack-mono);
  font-size: 0.8rem;
  font-weight: 600;
  background-color: var(--hud-bg-darkest);
  border: 1px solid var(--hud-border-dim);
  color: var(--hud-text-normal);
  padding: 6px 12px;
}

/* ===================================================================
   PRICING 规范：装备升级系统 (Equipment Loadout Upgrade)
   STANDARD / ADVANCED / ULTIMATE
   RECOMMENDED LOADOUT: POWER +35%, SPEED +20%, CAPABILITY +60%
   =================================================================== */

.loadout-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.loadout-card {
  position: relative;
  background: var(--hud-bg-panel);
  border: 1px solid var(--hud-border-bright);
  padding: 36px 28px 30px;
  display: flex;
  flex-direction: column;
  clip-path: polygon(16px 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%, 0 16px);
  transition: all var(--transition-normal);
}

.loadout-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.8);
}

/* 推荐装配卡片 (Recommended Loadout) */
.loadout-card.is-recommended {
  background: linear-gradient(180deg, rgba(249, 115, 22, 0.08) 0%, rgba(20, 26, 38, 0.95) 100%);
  border: 2px solid var(--hud-orange);
  box-shadow: 0 0 24px var(--hud-orange-glow);
}

.recommended-header-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--hud-orange);
  color: #000000;
  font-family: var(--font-stack-mono);
  font-size: 0.75rem;
  font-weight: 900;
  padding: 4px 16px;
  letter-spacing: 0.12em;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
  box-shadow: 0 0 12px var(--hud-orange);
  white-space: nowrap;
}

.loadout-category {
  font-family: var(--font-stack-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--hud-text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.loadout-name {
  font-size: 1.55rem;
  font-weight: 900;
  color: var(--hud-text-bright);
  margin-bottom: 16px;
}

/* 战术能力参数提升徽标 (Upgrade Stat Boosters) */
.upgrade-boosters {
  display: flex;
  gap: 6px;
  margin-bottom: 20px;
}

.booster-badge {
  font-family: var(--font-stack-mono);
  font-size: 0.7rem;
  font-weight: 800;
  padding: 3px 6px;
  background-color: rgba(234, 179, 8, 0.15);
  border: 1px solid var(--hud-yellow);
  color: var(--hud-yellow);
}

.loadout-price-box {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding-bottom: 20px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--hud-border-dim);
}

.price-currency {
  font-family: var(--font-stack-mono);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--hud-text-bright);
}

.price-value {
  font-family: var(--font-stack-mono);
  font-size: 2.75rem;
  font-weight: 900;
  color: var(--hud-text-bright);
  line-height: 1;
}

.price-period {
  font-family: var(--font-stack-mono);
  font-size: 0.85rem;
  color: var(--hud-text-muted);
}

.loadout-specs-list {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.loadout-spec-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.925rem;
  color: var(--hud-text-normal);
}

.loadout-spec-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--hud-orange);
}

.loadout-card .tactical-cta,
.loadout-card .tactical-secondary-cta {
  width: 100%;
}

/* ===================================================================
   使用场景 (Tactical Scenarios)
   =================================================================== */

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

.scenario-panel {
  background: var(--hud-bg-panel);
  border: 1px solid var(--hud-border-dim);
  padding: 28px;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.scenario-panel:hover {
  border-color: var(--hud-blue);
  box-shadow: 0 0 14px var(--hud-blue-glow);
}

.scenario-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--hud-text-bright);
  margin-bottom: 10px;
}

.scenario-device-badge {
  display: inline-block;
  font-family: var(--font-stack-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--hud-orange);
  background: rgba(249, 115, 22, 0.12);
  border: 1px solid var(--hud-orange);
  padding: 2px 10px;
  margin-bottom: 16px;
}

.scenario-desc {
  font-size: 0.925rem;
  color: var(--hud-text-normal);
  line-height: 1.7;
}

/* ===================================================================
   FAQ 战术协议解答 (Security & Protocol FAQ)
   =================================================================== */

.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--hud-bg-panel);
  border: 1px solid var(--hud-border-dim);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.faq-item.is-open {
  border-color: var(--hud-blue);
}

.faq-question-btn {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--hud-text-bright);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-icon-arrow {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--hud-blue);
  transition: transform var(--transition-fast);
}

.faq-item.is-open .faq-icon-arrow {
  transform: rotate(180deg);
  color: var(--hud-orange);
}

.faq-answer-panel {
  display: none;
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--hud-text-normal);
  line-height: 1.75;
  border-top: 1px dashed var(--hud-border-dim);
  margin-top: 4px;
  padding-top: 16px;
}

.faq-item.is-open .faq-answer-panel {
  display: block;
}

/* ===================================================================
   FINAL CTA 规范：整机启动感 (System Ready Activation)
   SYSTEM READY -> [ START NOW / 启动系统 ] -> MISSION INITIALIZED
   =================================================================== */

.final-cta-section {
  padding: 96px 0;
  background: radial-gradient(circle at 50% 50%, rgba(249, 115, 22, 0.1) 0%, #0a0d14 70%);
  border-bottom: 2px solid var(--hud-border-bright);
  text-align: center;
  position: relative;
}

.final-cta-box {
  max-width: 720px;
  margin: 0 auto;
}

.final-system-ready-tag {
  font-family: var(--font-stack-mono);
  font-size: 0.9rem;
  font-weight: 900;
  color: var(--hud-orange);
  letter-spacing: 0.25em;
  margin-bottom: 12px;
  display: inline-block;
}

.final-cta-title {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--hud-text-bright);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.final-cta-subtitle {
  font-size: 1.1rem;
  color: var(--hud-text-normal);
  line-height: 1.75;
  margin-bottom: 36px;
}

.final-mission-init-tag {
  font-family: var(--font-stack-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--hud-blue);
  letter-spacing: 0.15em;
  margin-top: 24px;
}

/* 移动端吸底 CTA 栏 (HUD Mobile Floating Bar) */
.mobile-sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background-color: rgba(16, 20, 30, 0.96);
  border-top: 2px solid var(--hud-orange);
  padding: 10px 16px;
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.7);
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mobile-sticky-info {
  display: flex;
  flex-direction: column;
}

.mobile-sticky-title {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--hud-text-bright);
}

.mobile-sticky-sub {
  font-family: var(--font-stack-mono);
  font-size: 0.75rem;
  color: var(--hud-blue);
}

/* ===================================================================
   页脚 Footer 模块 (Mission Control Footer)
   =================================================================== */

.site-footer {
  background-color: #080a0f;
  color: var(--hud-text-muted);
  padding: 64px 0 32px;
  font-size: 0.875rem;
  border-top: 1px solid var(--hud-border-dim);
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--hud-border-dim);
  margin-bottom: 32px;
}

.footer-brand-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--hud-text-bright);
  margin-bottom: 12px;
}

.footer-brand-desc {
  line-height: 1.65;
  max-width: 320px;
}

.footer-col-title {
  font-family: var(--font-stack-mono);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--hud-blue);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

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

.footer-links-list a {
  color: var(--hud-text-muted);
}

.footer-links-list a:hover {
  color: var(--hud-text-bright);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-stack-mono);
  font-size: 0.8rem;
  color: var(--hud-text-dim);
}

/* ===================================================================
   文章与静态内容排版 (Technical Documentation HUD Style)
   =================================================================== */

.content-section {
  padding: 56px 0 80px;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-stack-mono);
  font-size: 0.85rem;
  color: var(--hud-text-dim);
  margin-bottom: 28px;
}

.article-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--hud-border-dim);
}

.article-h1 {
  font-size: 2.35rem;
  line-height: 1.3;
  font-weight: 900;
  color: var(--hud-text-bright);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-family: var(--font-stack-mono);
  font-size: 0.85rem;
  color: var(--hud-text-muted);
}

.article-lead {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--hud-text-normal);
  background: var(--hud-bg-panel);
  border-left: 4px solid var(--hud-orange);
  padding: 20px 24px;
  margin-bottom: 36px;
  border-top: 1px solid var(--hud-border-dim);
  border-right: 1px solid var(--hud-border-dim);
  border-bottom: 1px solid var(--hud-border-dim);
}

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--hud-text-bright);
  margin-top: 48px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hud-border-dim);
  position: relative;
}

.article-body h2::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 60px;
  height: 2px;
  background-color: var(--hud-blue);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--hud-text-bright);
  margin-top: 28px;
  margin-bottom: 12px;
}

.article-body p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--hud-text-normal);
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin-left: 24px;
  margin-bottom: 24px;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--hud-text-normal);
}

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

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.925rem;
  background: var(--hud-bg-panel);
  border: 1px solid var(--hud-border-dim);
}

.article-body th {
  background-color: var(--hud-bg-graphite);
  color: var(--hud-text-bright);
  font-family: var(--font-stack-mono);
  font-weight: 700;
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--hud-border-bright);
}

.article-body td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--hud-border-dim);
  color: var(--hud-text-normal);
}

.article-cta-box {
  background: var(--hud-bg-panel);
  border: 2px solid var(--hud-orange);
  padding: 36px 28px;
  margin: 48px 0;
  text-align: center;
  box-shadow: 0 0 24px var(--hud-orange-glow);
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.article-cta-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--hud-text-bright);
  margin-bottom: 10px;
}

.article-cta-desc {
  font-size: 0.98rem;
  color: var(--hud-text-normal);
  margin-bottom: 24px;
}

.internal-links-box {
  background: var(--hud-bg-panel);
  border: 1px solid var(--hud-border-dim);
  padding: 24px 28px;
  margin: 40px 0;
}

.internal-links-title {
  font-family: var(--font-stack-mono);
  font-size: 1rem;
  font-weight: 800;
  color: var(--hud-blue);
  margin-bottom: 14px;
}

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

/* 指南中心列表网格 (Guides Hub Grid) */
.guides-list-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 36px;
}

.guide-item-card {
  background: var(--hud-bg-panel);
  border: 1px solid var(--hud-border-dim);
  padding: 28px;
  display: flex;
  flex-direction: column;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  transition: all var(--transition-normal);
}

.guide-item-card:hover {
  transform: translateY(-4px);
  border-color: var(--hud-blue);
  box-shadow: 0 0 18px var(--hud-blue-glow);
}

.guide-item-tag {
  align-self: flex-start;
  font-family: var(--font-stack-mono);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--hud-orange);
  background: rgba(249, 115, 22, 0.12);
  border: 1px solid var(--hud-orange);
  padding: 2px 10px;
  margin-bottom: 12px;
}

.guide-item-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--hud-text-bright);
  margin-bottom: 10px;
  line-height: 1.45;
}

.guide-item-desc {
  font-size: 0.925rem;
  color: var(--hud-text-normal);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.guide-item-meta {
  font-family: var(--font-stack-mono);
  font-size: 0.8rem;
  color: var(--hud-text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--hud-border-dim);
  padding-top: 14px;
}

/* 网站地图样式 */
.sitemap-group {
  margin-bottom: 36px;
  background: var(--hud-bg-panel);
  border: 1px solid var(--hud-border-dim);
  padding: 28px;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.sitemap-group-title {
  font-family: var(--font-stack-mono);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--hud-blue);
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--hud-border-dim);
}

.sitemap-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 24px;
}

/* 响应式断点适配 */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .loadout-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-title {
    font-size: 2.15rem;
  }
  .main-nav {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .tactical-media-grid {
    grid-template-columns: 1fr;
  }
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .guides-list-grid {
    grid-template-columns: 1fr;
  }
  .sitemap-list {
    grid-template-columns: 1fr;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
  }
  .article-h1 {
    font-size: 1.75rem;
  }
  body {
    padding-bottom: 64px;
  }
}

/* 无障碍：减少动效模式支持 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .radar-sweep-beam {
    display: none !important;
  }
  .tactical-cta:hover {
    animation: none !important;
  }
}