/* ===================================================================
   TAG 机场 (tagss.click) - ATC 雷达与矢量空管级专用网络系统样式表
   UI Concept: TAG Gateway — ATC Radar & Vector Routing
   零重型库依赖 | 纯原生 CSS | 昼夜模式 | 毫秒级秒开 | 军工级矢量仪表美学
   =================================================================== */

:root {
  /* 基础网格与排版 */
  --font-mono: "SF Mono", "JetBrains Mono", "Roboto Mono", Menlo, Consolas, Monaco, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition-speed: 0.28s;
  --header-h: 70px;

  /* 默认：白天作战指挥模式 (Daylight Tactical Mode) */
  --bg-abyss: #f0f4f9;
  --bg-surface: #ffffff;
  --bg-surface-alt: #e8eef5;
  --bg-glass: rgba(240, 244, 249, 0.88);
  --border-radar: rgba(14, 116, 144, 0.25);
  --border-strong: rgba(14, 116, 144, 0.45);
  --grid-line: rgba(14, 116, 144, 0.08);

  --text-primary: #0a1420;
  --text-muted: #475569;
  --text-dim: #64748b;

  --cyan-phosphor: #0891b2;
  --cyan-glow: rgba(8, 145, 178, 0.18);
  --radar-green: #059669;
  --radar-green-glow: rgba(5, 150, 105, 0.15);
  --warning-amber: #d97706;

  --card-bg: rgba(255, 255, 255, 0.95);
  --card-border: #cbd5e1;
  --shadow-hud: 0 4px 20px -2px rgba(15, 23, 42, 0.08);
}

/* 黑暗夜间模式：ATC 深渊雷达 (Pitch Black Abyss & Luminous Phosphor) */
[data-theme="dark"] {
  --bg-abyss: #05070B;
  --bg-surface: #090e17;
  --bg-surface-alt: #0e1624;
  --bg-glass: rgba(5, 7, 11, 0.88);
  --border-radar: rgba(0, 240, 255, 0.2);
  --border-strong: rgba(0, 240, 255, 0.4);
  --grid-line: rgba(0, 240, 255, 0.04);

  --text-primary: #f0fdf4;
  --text-muted: #8da4be;
  --text-dim: #4d6682;

  --cyan-phosphor: #00F0FF;
  --cyan-glow: rgba(0, 240, 255, 0.3);
  --radar-green: #00FF66;
  --radar-green-glow: rgba(0, 255, 102, 0.25);
  --warning-amber: #f59e0b;

  --card-bg: rgba(9, 14, 23, 0.85);
  --card-border: rgba(0, 240, 255, 0.22);
  --shadow-hud: 0 0 25px -4px rgba(0, 240, 255, 0.12);
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-abyss);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  overflow-x: hidden;
  position: relative;
  background-image: 
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--radar-green), var(--cyan-phosphor), var(--radar-green));
  z-index: 999;
  box-shadow: 0 0 10px var(--cyan-phosphor);
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

.telemetry, code, .nav-code {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* 顶部导航条 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  height: var(--header-h);
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-radar);
  transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-vector-mark {
  width: 38px;
  height: 38px;
  border: 1px solid var(--cyan-phosphor);
  background: rgba(0, 240, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: 0 0 12px var(--cyan-glow);
}

.brand-vector-mark::before {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--radar-green);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--radar-green);
}

.brand-title-wrap {
  display: flex;
  flex-direction: column;
}

.brand-callsign {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--cyan-phosphor);
  letter-spacing: 0.12em;
  line-height: 1;
}

.brand-name-text {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.brand-name-text span {
  color: var(--cyan-phosphor);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 550;
  color: var(--text-muted);
  position: relative;
  padding: 6px 4px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.nav-link .nav-dot {
  width: 4px;
  height: 4px;
  background: transparent;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--cyan-phosphor);
}

.nav-link:hover .nav-dot, .nav-link.active .nav-dot {
  background: var(--cyan-phosphor);
  box-shadow: 0 0 6px var(--cyan-phosphor);
}

.nav-link.badge-link {
  color: var(--radar-green);
  font-weight: 600;
  border: 1px solid rgba(0, 255, 102, 0.3);
  padding: 4px 10px;
  border-radius: 2px;
  background: rgba(0, 255, 102, 0.05);
}

.nav-link.badge-link:hover, .nav-link.badge-link.active {
  background: rgba(0, 255, 102, 0.15);
  box-shadow: 0 0 10px var(--radar-green-glow);
  color: var(--radar-green);
}

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

.theme-toggle-btn {
  background: rgba(0, 240, 255, 0.06);
  border: 1px solid var(--border-radar);
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan-phosphor);
  transition: all 0.25s ease;
  position: relative;
  backdrop-filter: blur(8px);
}

.theme-toggle-btn:hover {
  border-color: var(--cyan-phosphor);
  box-shadow: 0 0 12px var(--cyan-glow);
  transform: translateY(-1px);
}

.theme-toggle-btn svg {
  width: 18px;
  height: 18px;
}

.theme-icon-sun { display: block; }
.theme-icon-moon { display: none; }

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

/* 按钮体系 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.92rem;
  font-weight: 650;
  letter-spacing: 0.02em;
  cursor: pointer;
  position: relative;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
  user-select: none;
  min-height: 44px;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.btn-primary {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.2) 0%, rgba(0, 150, 255, 0.1) 100%);
  color: var(--text-primary);
  border: 1px solid var(--cyan-phosphor);
  box-shadow: 0 0 16px var(--cyan-glow);
}

.btn-primary::before {
  content: "";
  position: absolute;
  top: -1px; left: -1px;
  width: 6px; height: 6px;
  border-top: 2px solid var(--cyan-phosphor);
  border-left: 2px solid var(--cyan-phosphor);
}
.btn-primary::after {
  content: "";
  position: absolute;
  bottom: -1px; right: -1px;
  width: 6px; height: 6px;
  border-bottom: 2px solid var(--cyan-phosphor);
  border-right: 2px solid var(--cyan-phosphor);
}

.btn-primary:hover {
  background: var(--cyan-phosphor);
  color: #05070B !important;
  box-shadow: 0 0 24px var(--cyan-phosphor);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(14, 22, 36, 0.4);
  color: var(--text-primary);
  border: 1px solid var(--border-radar);
}

.btn-secondary:hover {
  border-color: var(--cyan-phosphor);
  background: rgba(0, 240, 255, 0.08);
  box-shadow: 0 0 12px var(--cyan-glow);
}

.btn-lg {
  padding: 14px 30px;
  font-size: 1rem;
  min-height: 52px;
}

.btn-sm {
  padding: 6px 16px;
  font-size: 0.84rem;
  min-height: 36px;
}

.btn-block {
  width: 100%;
}

.hud-panel {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  position: relative;
  box-shadow: var(--shadow-hud);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.hud-panel::before, .hud-panel::after {
  content: "+";
  position: absolute;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  color: var(--cyan-phosphor);
  pointer-events: none;
}
.hud-panel::before { top: 4px; left: 6px; }
.hud-panel::after { bottom: 4px; right: 6px; }

/* HERO SECTION */
.hero-dashboard {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  padding: 40px 0 60px;
  overflow: hidden;
}

.radar-canvas-container {
  position: absolute;
  top: 0;
  right: 0;
  width: 60%;
  height: 100%;
  pointer-events: auto;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

#atcRadarGlobe {
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}

#atcRadarGlobe:active {
  cursor: grabbing;
}

.hero-telemetry-layer {
  position: relative;
  z-index: 2;
  max-width: 640px;
  pointer-events: auto;
}

.atc-status-strip {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 6px 14px;
  border: 1px solid var(--border-radar);
  background: rgba(0, 240, 255, 0.04);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan-phosphor);
  margin-bottom: 22px;
}

.atc-beacon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--radar-green);
  box-shadow: 0 0 10px var(--radar-green);
  animation: beaconPulse 1.8s infinite;
}

@keyframes beaconPulse {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.7; }
}

.hero-main-headline {
  font-size: 3.1rem;
  font-weight: 850;
  line-height: 1.16;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.hero-main-headline .brand-highlight {
  color: var(--cyan-phosphor);
  text-shadow: 0 0 20px var(--cyan-glow);
  display: inline-block;
}

.hero-main-headline .atc-subtitle-highlight {
  display: block;
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-top: 6px;
  letter-spacing: -0.01em;
}

.hero-intro-text {
  font-size: 1.08rem;
  line-height: 1.72;
  color: var(--text-muted);
  margin-bottom: 30px;
  border-left: 2px solid var(--cyan-phosphor);
  padding-left: 16px;
  background: linear-gradient(90deg, rgba(0, 240, 255, 0.04) 0%, transparent 100%);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.flightpath-anchors-hud {
  border-top: 1px dashed var(--border-radar);
  padding-top: 20px;
}

.flightpath-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.flightpath-tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.flightpath-btn {
  background: rgba(0, 240, 255, 0.05);
  border: 1px solid var(--border-radar);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 5px 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.flightpath-btn:hover, .flightpath-btn.active {
  border-color: var(--cyan-phosphor);
  color: var(--cyan-phosphor);
  background: rgba(0, 240, 255, 0.15);
  box-shadow: 0 0 10px var(--cyan-glow);
  transform: translateY(-1px);
}

.flightpath-btn .btn-ping {
  color: var(--radar-green);
  font-size: 0.75rem;
}

.telemetry-readout-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.telemetry-metric {
  background: rgba(0, 240, 255, 0.03);
  border: 1px solid var(--border-radar);
  padding: 12px;
  position: relative;
}

.telemetry-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.telemetry-val {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 750;
  color: var(--cyan-phosphor);
}

/* 光标 HUD */
.cursor-compass-hud {
  position: fixed;
  top: 0;
  left: 0;
  width: 90px;
  height: 90px;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.3s ease;
  display: block;
}

.cursor-reticle-circle {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: 1px dashed rgba(0, 240, 255, 0.45);
  border-radius: 50%;
  animation: reticleSpin 20s linear infinite;
}

.cursor-reticle-cross {
  position: absolute;
  top: 50%; left: 50%;
  width: 12px; height: 12px;
  transform: translate(-50%, -50%);
}
.cursor-reticle-cross::before, .cursor-reticle-cross::after {
  content: "";
  position: absolute;
  background: var(--cyan-phosphor);
}
.cursor-reticle-cross::before {
  top: 5px; left: 0; width: 12px; height: 1px;
}
.cursor-reticle-cross::after {
  top: 0; left: 5px; width: 1px; height: 12px;
}

.cursor-hud-data {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--cyan-phosphor);
  white-space: nowrap;
  background: rgba(5, 7, 11, 0.85);
  padding: 2px 6px;
  border: 1px solid var(--border-radar);
  border-radius: 2px;
  text-shadow: 0 0 4px var(--cyan-phosphor);
}

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

/* 通用区域定义 */
.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-code-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--cyan-phosphor);
  margin-bottom: 8px;
  display: inline-block;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 核心优势卡片 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-atc-card {
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  border-left: 3px solid var(--border-radar);
}

.feature-atc-card:hover {
  transform: translateY(-6px);
  border-left-color: var(--cyan-phosphor);
  box-shadow: 0 0 25px var(--cyan-glow);
}

.card-vector-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.vector-radar-glyph {
  width: 48px;
  height: 48px;
  border: 1px solid var(--border-radar);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: rgba(0, 240, 255, 0.04);
}

.feature-atc-card:hover .vector-radar-glyph {
  border-color: var(--cyan-phosphor);
  box-shadow: 0 0 14px var(--cyan-glow);
}

.card-sector-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--radar-green);
  border: 1px solid rgba(0, 255, 102, 0.3);
  padding: 2px 8px;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 750;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.feature-specs-list {
  border-top: 1px dashed var(--border-radar);
  padding-top: 16px;
  list-style: none;
}

.feature-specs-list li {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-specs-list li:last-child {
  margin-bottom: 0;
}

.feature-specs-list li::before {
  content: "»";
  color: var(--cyan-phosphor);
  font-size: 1rem;
}

/* 流媒体与 AI 图卡 */
.spotlight-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.spotlight-atc-panel {
  padding: 38px 34px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.spotlight-top-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.atc-status-chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 2px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.chip-streaming {
  color: var(--radar-green);
  background: rgba(0, 255, 102, 0.08);
  border: 1px solid rgba(0, 255, 102, 0.3);
}

.chip-ai {
  color: var(--cyan-phosphor);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.3);
}

.spotlight-title {
  font-size: 1.6rem;
  font-weight: 750;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.spotlight-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.vector-matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 26px;
}

.matrix-cell {
  background: rgba(0, 240, 255, 0.03);
  border: 1px solid var(--border-radar);
  padding: 8px 10px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cell-name {
  color: var(--text-primary);
  font-weight: 600;
}

.cell-status {
  font-size: 0.7rem;
  color: var(--radar-green);
}

.spotlight-footer {
  border-top: 1px dashed var(--border-radar);
  padding-top: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* 真实价格表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.pricing-atc-card {
  padding: 34px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
  border-top: 2px solid var(--border-radar);
}

.pricing-atc-card:hover {
  transform: translateY(-5px);
  border-top-color: var(--cyan-phosphor);
  box-shadow: 0 0 20px var(--cyan-glow);
}

.pricing-atc-card.recommended {
  border-top-color: var(--cyan-phosphor);
  border-width: 2px;
  box-shadow: 0 0 30px var(--cyan-glow);
  transform: scale(1.02);
}

.pricing-atc-card.recommended:hover {
  transform: scale(1.02) translateY(-5px);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--cyan-phosphor);
  color: #05070B;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  box-shadow: 0 0 10px var(--cyan-phosphor);
}

.pricing-header {
  text-align: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-radar);
  margin-bottom: 22px;
}

.plan-code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan-phosphor);
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.plan-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  min-height: 38px;
}

.plan-price-row {
  margin: 16px 0 6px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
  font-family: var(--font-mono);
}

.price-currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cyan-phosphor);
}

.price-val {
  font-size: 2.8rem;
  font-weight: 850;
  color: var(--text-primary);
  line-height: 1;
}

.price-period {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.pricing-specs {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.pricing-specs li {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.45;
}

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

.pricing-specs li.highlight {
  color: var(--text-primary);
  font-weight: 600;
}

.pricing-specs li.disabled {
  color: var(--text-dim);
  text-decoration: line-through;
  opacity: 0.6;
}

/* 用户评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-atc-card {
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-telemetry-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
}

.review-rating {
  color: var(--warning-amber);
  letter-spacing: 2px;
}

.review-body {
  font-size: 0.96rem;
  color: var(--text-primary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
}

.review-pilot {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px dashed var(--border-radar);
  padding-top: 14px;
}

.pilot-avatar-hud {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-radar);
  background: rgba(0, 240, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--cyan-phosphor);
}

.pilot-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.pilot-info p {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-dim);
}

/* FAQ 手风琴 */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-atc-item {
  border: 1px solid var(--border-radar);
  background: var(--card-bg);
  transition: all 0.2s ease;
}

.faq-atc-item:hover, .faq-atc-item.active {
  border-color: var(--cyan-phosphor);
  box-shadow: 0 0 14px var(--cyan-glow);
}

.faq-btn {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
}

.faq-icon-cross {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--cyan-phosphor);
  transition: transform 0.25s ease;
}

.faq-atc-item.active .faq-icon-cross {
  transform: rotate(45deg);
  color: var(--radar-green);
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
}

.faq-atc-item.active .faq-content {
  max-height: 480px;
  padding: 0 24px 22px;
}

.faq-content p {
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.72;
}

/* 页脚规范：严格保留四个指定标题 */
.site-footer {
  border-top: 1px solid var(--border-radar);
  padding: 48px 0 36px;
  margin-top: 80px;
  background: var(--bg-surface);
  position: relative;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-link {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text-muted);
  padding: 6px 14px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  letter-spacing: 0.03em;
}

.footer-link:hover {
  color: var(--cyan-phosphor);
  border-color: var(--border-radar);
  background: rgba(0, 240, 255, 0.05);
}

.footer-copy {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  border-top: 1px dashed var(--border-radar);
  padding-top: 22px;
}

/* 二级页面基础通用 */
.page-hero {
  padding: 68px 0 44px;
  text-align: center;
  border-bottom: 1px solid var(--border-radar);
  background: linear-gradient(180deg, rgba(0, 240, 255, 0.04) 0%, transparent 100%);
}

.page-title {
  font-size: 2.7rem;
  font-weight: 850;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

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

.page-content-wrapper {
  padding: 60px 0 90px;
  max-width: 960px;
  margin: 0 auto;
}

.page-card {
  padding: 44px 38px;
  margin-bottom: 30px;
}

.page-card h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--cyan-phosphor);
  margin: 22px 0 10px;
}

.page-card p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.78;
  margin-bottom: 16px;
}

.page-card ul {
  padding-left: 20px;
  margin-bottom: 20px;
  color: var(--text-muted);
}

.page-card ul li {
  margin-bottom: 8px;
  line-height: 1.65;
}

/* ===================================================================
   SEO 深度长篇科普文章专属系统 (Article Layout System)
   包含：面包屑、目录(TOC)、技术对比表格、代码块、FAQ 折叠、相关阅读矩阵
   =================================================================== */

.article-container {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 24px;
}

.article-breadcrumb a:hover {
  color: var(--cyan-phosphor);
}

.article-header {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-radar);
}

.article-headline {
  font-size: 2.4rem;
  font-weight: 850;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

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

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

/* 目录 (Table of Contents - TOC) */
.article-toc-box {
  background: rgba(0, 240, 255, 0.03);
  border: 1px solid var(--border-radar);
  border-left: 3px solid var(--cyan-phosphor);
  padding: 24px 28px;
  margin-bottom: 40px;
  position: relative;
}

.toc-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 750;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.toc-list {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-item a {
  font-size: 0.94rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.2s ease;
}

.toc-item a::before {
  content: "§";
  color: var(--cyan-phosphor);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.toc-item a:hover {
  color: var(--cyan-phosphor);
  text-decoration: underline;
}

/* 正文深度排版 */
.article-content {
  font-size: 1.05rem;
  line-height: 1.82;
  color: var(--text-muted);
}

.article-content h2 {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 48px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-radar);
  display: flex;
  align-items: center;
  gap: 10px;
  scroll-margin-top: 90px;
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 750;
  color: var(--cyan-phosphor);
  margin: 30px 0 14px;
  scroll-margin-top: 90px;
}

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

.article-content strong {
  color: var(--text-primary);
  font-weight: 700;
}

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

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

/* 内链高亮强调框 */
.internal-link-callout {
  background: rgba(0, 255, 102, 0.05);
  border: 1px dashed var(--radar-green);
  padding: 18px 22px;
  margin: 28px 0;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.98rem;
}

.internal-link-callout a {
  color: var(--radar-green);
  font-weight: 750;
  text-decoration: underline;
}

.internal-link-callout a:hover {
  color: var(--cyan-phosphor);
}

/* 技术数据对比表 */
.article-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0 34px;
  border: 1px solid var(--border-radar);
  background: var(--card-bg);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  text-align: left;
}

.article-table th {
  background: rgba(0, 240, 255, 0.06);
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-weight: 750;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-radar);
  white-space: nowrap;
}

.article-table td {
  padding: 13px 18px;
  border-bottom: 1px solid var(--border-radar);
  color: var(--text-muted);
}

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

.article-table tr:hover td {
  background: rgba(0, 240, 255, 0.02);
}

/* 代码与配置展示块 */
.code-block-hud {
  background: #090e17;
  color: #00F0FF;
  border: 1px solid var(--border-radar);
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  margin: 24px 0;
  overflow-x: auto;
  border-radius: 2px;
  position: relative;
}

.code-block-hud::before {
  content: "CONFIG // RAW";
  position: absolute;
  top: 4px;
  right: 10px;
  font-size: 0.65rem;
  color: var(--text-dim);
}

/* 文章内置 FAQ 区域 */
.article-faq-section {
  margin-top: 54px;
  padding-top: 36px;
  border-top: 1px dashed var(--border-radar);
}

/* 相关阅读推荐矩阵 */
.related-reads-section {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 2px solid var(--border-radar);
}

.related-reads-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.related-card {
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-left: 3px solid var(--border-radar);
  transition: all 0.25s ease;
}

.related-card:hover {
  border-left-color: var(--cyan-phosphor);
  transform: translateY(-3px);
  box-shadow: 0 0 16px var(--cyan-glow);
}

.related-card-title {
  font-size: 1.05rem;
  font-weight: 750;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.45;
}

.related-card-desc {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* 文章底部转化横幅 */
.article-cta-box {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.08) 0%, rgba(0, 255, 102, 0.04) 100%);
  border: 1px solid var(--border-radar);
  padding: 34px 28px;
  margin: 50px 0;
  text-align: center;
}

.article-cta-box h3 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.article-cta-box p {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 22px;
}

/* ===================================================================
   RESPONSIVE MEDIA QUERIES (@media)
   =================================================================== */
@media (max-width: 1100px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-atc-card.recommended {
    transform: none;
  }
  .pricing-atc-card.recommended:hover {
    transform: translateY(-5px);
  }
  .radar-canvas-container {
    opacity: 0.35;
    width: 85%;
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 64px;
  }

  .cursor-compass-hud {
    display: none !important;
  }

  .nav-links {
    display: none;
  }

  .hero-dashboard {
    min-height: auto;
    padding: 30px 0 50px;
  }

  .radar-canvas-container {
    position: relative;
    width: 100%;
    height: 380px;
    margin-top: 24px;
    opacity: 1;
  }

  .hero-main-headline {
    font-size: 2.2rem;
  }

  .hero-main-headline .atc-subtitle-highlight {
    font-size: 1.35rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .telemetry-readout-bar {
    grid-template-columns: repeat(2, 1fr);
  }

  .features-grid,
  .spotlight-grid,
  .pricing-grid,
  .reviews-grid,
  .vector-matrix-grid,
  .related-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .feature-atc-card,
  .spotlight-atc-panel,
  .pricing-atc-card,
  .review-atc-card,
  .article-container {
    padding: 24px 18px;
  }

  .article-headline {
    font-size: 1.85rem;
  }

  .footer-nav {
    gap: 16px;
  }

  .footer-link {
    font-size: 0.9rem;
    padding: 8px 10px;
  }
}