/* ==========================================================================
   超实惠机场 (cishanjichang.lat) - 核心工业级气压管道调度样式表
   Pneumatic-Tube Dispatch Logistics UI System
   ========================================================================== */

:root {
  /* 基础配色 - 白天模式 (默认) - 高精密铝合金与冷灰工程质感 */
  --bg-primary: #f2f5f9;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-subtle: #e6ecf3;
  --bg-industrial: #dce3ed;
  
  --text-primary: #0a0e17;
  --text-secondary: #3b4758;
  --text-muted: #64748b;
  --border-color: #cbd5e1;
  --border-subtle: #e2e8f0;
  
  /* 工业气压调度专属色彩体系 */
  --brand-aluminum: #242933;
  --brand-emerald: #059669;
  --brand-emerald-glow: rgba(5, 150, 105, 0.2);
  --brand-cyan: #0284c7;
  --brand-cyan-glow: rgba(2, 132, 199, 0.2);
  --brand-gradient: linear-gradient(135deg, #059669 0%, #0284c7 100%);
  --brand-gradient-hover: linear-gradient(135deg, #047857 0%, #0369a1 100%);
  
  /* 气压玻璃管道效果 (白天) */
  --tube-glass-bg: rgba(240, 246, 252, 0.65);
  --tube-glass-border: rgba(148, 163, 184, 0.45);
  --tube-glass-shine: rgba(255, 255, 255, 0.95);
  --tube-reflection: linear-gradient(180deg, rgba(255,255,255,0.8) 0%, rgba(255,255,255,0.2) 35%, rgba(0,0,0,0.04) 70%, rgba(255,255,255,0.5) 100%);
  --vent-dot: rgba(71, 85, 105, 0.25);
  
  /* 辅助状态色 */
  --badge-bg: #ecfdf5;
  --badge-color: #065f46;
  --star-color: #d97706;
  
  /* 阴影效果 */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 18px -2px rgba(15, 23, 42, 0.08), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 16px 36px -4px rgba(15, 23, 42, 0.12), 0 6px 16px -2px rgba(15, 23, 42, 0.05);
  --shadow-hover: 0 20px 40px -4px rgba(5, 150, 105, 0.18), 0 8px 18px -2px rgba(15, 23, 42, 0.06);

  /* 尺寸与间距 */
  --nav-height: 74px;
  --container-max: 1220px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.32s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 黑夜模式 - 阳极氧化铝灰 & 输送带深碳黑 & 高可见度调度翡翠绿 */
[data-theme="dark"] {
  --bg-primary: #0a0b0e;             /* deep conveyor-belt charcoal */
  --bg-surface: #14161b;             /* brushed anodized aluminum grey */
  --bg-surface-elevated: #1a1e26;    /* elevated modular aluminum bay */
  --bg-subtle: #111318;
  --bg-industrial: #0d0f14;
  
  --text-primary: #f3f5f8;
  --text-secondary: #9aa5b6;
  --text-muted: #626e82;
  --border-color: #232834;
  --border-subtle: #191c24;
  
  --brand-aluminum: #14161b;
  --brand-emerald: #10b981;          /* high-visibility dispatch emerald */
  --brand-emerald-glow: rgba(16, 185, 129, 0.35);
  --brand-cyan: #06b6d4;             /* bright cyan accents */
  --brand-cyan-glow: rgba(6, 182, 212, 0.35);
  --brand-gradient: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  --brand-gradient-hover: linear-gradient(135deg, #34d399 0%, #22d3ee 100%);
  
  /* 气压玻璃管道效果 (黑夜) */
  --tube-glass-bg: rgba(16, 22, 34, 0.65);
  --tube-glass-border: rgba(6, 182, 212, 0.35);
  --tube-glass-shine: rgba(255, 255, 255, 0.4);
  --tube-reflection: linear-gradient(180deg, rgba(255,255,255,0.3) 0%, rgba(6, 182, 212, 0.08) 35%, rgba(0,0,0,0.5) 70%, rgba(16, 185, 129, 0.15) 100%);
  --vent-dot: rgba(255, 255, 255, 0.12);
  
  --badge-bg: rgba(16, 185, 129, 0.15);
  --badge-color: #6ee7b7;
  --star-color: #f59e0b;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 22px -2px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 16px 40px -4px rgba(0, 0, 0, 0.75);
  --shadow-hover: 0 20px 45px -4px rgba(16, 185, 129, 0.28);
}

/* 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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* 锚点滚动留白 */
section[id] {
  scroll-margin-top: 86px;
}

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

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

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

/* 导航栏 (Industrial Glassmorphism) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-height);
  background-color: rgba(242, 245, 249, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="dark"] .site-header {
  background-color: rgba(10, 11, 14, 0.88);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 14px var(--brand-emerald-glow);
  position: relative;
  overflow: hidden;
}

.brand-icon::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 40%;
  background: linear-gradient(180deg, rgba(255,255,255,0.4) 0%, transparent 100%);
}

.brand-name {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.brand-code {
  font-size: 0.72rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--brand-cyan);
  margin-left: 6px;
  letter-spacing: 0.04em;
}

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

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 8px 6px;
  position: relative;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--brand-emerald);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--brand-gradient);
  border-radius: var(--radius-full);
  transition: width var(--transition-fast);
}

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

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

/* 昼夜模式切换按钮（工业高精度透明质感） */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.5);
  color: var(--text-secondary);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--transition-normal);
  position: relative;
  outline: none;
}

[data-theme="dark"] .theme-toggle-btn {
  background-color: rgba(20, 22, 27, 0.6);
  color: #f3f5f8;
}

.theme-toggle-btn:hover {
  border-color: var(--brand-emerald);
  color: var(--brand-emerald);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px var(--brand-emerald-glow);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-normal);
}

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

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

/* 通用工程按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  min-height: 46px;
  position: relative;
  letter-spacing: -0.01em;
}

.btn-primary {
  background: var(--brand-gradient);
  color: #ffffff;
  box-shadow: 0 4px 16px var(--brand-emerald-glow);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  background: var(--brand-gradient-hover);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--brand-emerald-glow), 0 0 16px var(--brand-cyan-glow);
}

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

.btn-secondary:hover {
  border-color: var(--brand-emerald);
  color: var(--brand-emerald);
  background-color: var(--bg-subtle);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn-lg {
  padding: 14px 34px;
  font-size: 1.08rem;
  min-height: 52px;
}

.btn-block {
  width: 100%;
}

.mobile-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
}

/* ==========================================================================
   主视觉区 (Hero) + 气压管道调度系统 (Pneumatic Dispatch Logistics System)
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 60px 0 50px;
  overflow: hidden;
  text-align: center;
}

.hero-glow-bg {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 500px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.12) 0%, rgba(6, 182, 212, 0.08) 45%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background-color: var(--badge-bg);
  color: var(--badge-color);
  font-size: 0.86rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 22px;
  border: 1px solid rgba(16, 185, 129, 0.3);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--brand-emerald);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-emerald 2s infinite;
}

@keyframes pulse-emerald {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: clamp(1.85rem, 3vw, 2.75rem);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
  color: var(--text-primary);
  word-break: keep-all;
}

.hero-title-line {
  display: block;
  white-space: nowrap;
}

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

/* 核心简介区 (清晰展示品牌初衷与工程概览) */
.hero-briefing {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--brand-emerald);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  max-width: 840px;
  margin: 0 auto 32px;
  text-align: left;
  box-shadow: var(--shadow-sm);
}

.briefing-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.briefing-tag {
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brand-emerald);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.briefing-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.76rem;
  color: var(--brand-cyan);
  font-weight: 700;
  font-family: ui-monospace, monospace;
}

.briefing-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
}

/* ==========================================================================
   气动管道调度微交互组件 (Photorealistic Pneumatic Dispatch Tube Interface)
   ========================================================================== */
.pneumatic-dispatch-container {
  max-width: 1040px;
  margin: 0 auto 40px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-md);
  position: relative;
}

.dispatch-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--border-color);
}

.dispatch-title-box {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-primary);
}

.dispatch-title-box svg {
  color: var(--brand-emerald);
}

.pressure-gauge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-family: ui-monospace, monospace;
  color: var(--text-secondary);
  background-color: var(--bg-subtle);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
}

.pressure-val {
  color: var(--brand-emerald);
  font-weight: 800;
}

/* 气动管道核心结构 */
.tube-visual-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 22px;
}

.tube-station {
  flex-shrink: 0;
  width: 140px;
  padding: 12px 10px;
  background-color: var(--bg-industrial);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
  position: relative;
  z-index: 2;
}

.station-type {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--brand-cyan);
  font-family: ui-monospace, monospace;
  margin-bottom: 4px;
}

.station-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* 透明亚克力气压管道 (3D Cylindrical Tube) */
.tube-acrylic-glass {
  position: relative;
  flex-grow: 1;
  height: 52px;
  background: var(--tube-glass-bg);
  border: 2px solid var(--tube-glass-border);
  border-radius: 26px;
  box-shadow: inset 0 2px 8px rgba(0,0,0,0.2), 0 2px 10px var(--brand-cyan-glow);
  overflow: hidden;
  display: flex;
  align-items: center;
}

.tube-acrylic-glass::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: var(--tube-reflection);
  pointer-events: none;
  z-index: 1;
}

/* 气动胶囊数据胶囊实体 */
.pneumatic-capsule {
  position: absolute;
  left: 20px;
  width: 58px;
  height: 32px;
  border-radius: 16px;
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  box-shadow: 0 0 18px rgba(16, 185, 129, 0.8), 0 0 10px rgba(6, 182, 212, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 800;
  font-family: ui-monospace, monospace;
  z-index: 3;
  transition: transform 0.1s ease-out;
}

.pneumatic-capsule.shooting {
  animation: capsuleShoot 1.3s cubic-bezier(0.12, 0.8, 0.32, 1) forwards;
}

/* 气压压缩激波尾迹 */
.compression-trail {
  position: absolute;
  left: 0;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, transparent 0%, rgba(6, 182, 212, 0.3) 70%, rgba(16, 185, 129, 0.6) 100%);
  filter: blur(4px);
  z-index: 2;
  pointer-events: none;
}

.compression-trail.active {
  animation: trailExpand 1.3s cubic-bezier(0.12, 0.8, 0.32, 1) forwards;
}

@keyframes capsuleShoot {
  0% {
    left: 10px;
    transform: scale(0.9);
  }
  20% {
    transform: scale(1.15) skewX(-15deg);
  }
  75% {
    left: calc(100% - 70px);
    transform: scale(1.05) skewX(-5deg);
  }
  90% {
    left: calc(100% - 66px);
    transform: scale(0.9) skewX(10deg); /* soft cushioning compression */
  }
  100% {
    left: calc(100% - 68px);
    transform: scale(1); /* settled */
  }
}

@keyframes trailExpand {
  0% { width: 0%; opacity: 0.8; }
  60% { width: 85%; opacity: 1; }
  100% { width: 95%; opacity: 0; }
}

/* 节点线路调度按钮选择器 */
.dispatch-route-selector {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.route-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.route-btn:hover, .route-btn.active {
  background-color: var(--bg-surface-elevated);
  border-color: var(--brand-emerald);
  color: var(--brand-emerald);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--brand-emerald-glow);
}

.route-ping {
  font-size: 0.72rem;
  font-family: ui-monospace, monospace;
  color: var(--brand-cyan);
}

/* 信任指标栏 (工业风格) */
.trust-metrics-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 22px 28px;
  box-shadow: var(--shadow-sm);
}

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

.metric-val {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--brand-emerald);
  line-height: 1.2;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   通用区块头
   ========================================================================== */
.section {
  padding: 90px 0;
  position: relative;
}

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

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--brand-emerald);
  margin-bottom: 12px;
  font-family: ui-monospace, monospace;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

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

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

.feature-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--brand-emerald);
  box-shadow: var(--shadow-hover);
}

.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: var(--badge-bg);
  color: var(--brand-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

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

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex-grow: 1;
}

.feature-badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--border-color);
}

.feature-badge {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   流媒体图卡 & AI 支持图卡 (去通用AI化，采用工业级调度终端读出风格)
   ========================================================================== */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.showcase-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 34px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.showcase-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-emerald);
}

.showcase-badge-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  background-color: var(--badge-bg);
  color: var(--badge-color);
  margin-bottom: 18px;
  font-family: ui-monospace, monospace;
}

.showcase-title {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.showcase-desc {
  font-size: 0.98rem;
  color: var(--text-secondary);
  margin-bottom: 26px;
  line-height: 1.6;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 26px;
}

.platform-pill {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 14px 10px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-align: center;
}

.platform-pill:hover {
  background-color: var(--bg-surface);
  border-color: var(--brand-emerald);
  transform: scale(1.03);
  box-shadow: 0 4px 12px var(--brand-emerald-glow);
}

.platform-pill-icon {
  font-size: 1.5rem;
}

.platform-pill-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
}

.platform-pill-tag {
  font-size: 0.72rem;
  color: var(--brand-emerald);
  font-weight: 700;
}

.showcase-specs-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.showcase-specs-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.showcase-specs-item svg {
  width: 18px;
  height: 18px;
  color: var(--brand-emerald);
  flex-shrink: 0;
}

/* ==========================================================================
   套餐价格对比表 (模块化铝合金货架舱 + 微孔散热边缘发光 Micro-perforated Vents)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

/* 模块化铝合金货架舱卡片 */
.pricing-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  overflow: hidden;
}

/* 微孔金属边缘散热槽 (Micro-perforated Metal Edge Vents) */
.pricing-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background-image: radial-gradient(var(--vent-dot) 1.5px, transparent 1.5px);
  background-size: 6px 6px;
  opacity: 0.7;
  transition: opacity var(--transition-fast), background-color var(--transition-fast);
}

.pricing-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 8px;
  background-image: radial-gradient(var(--vent-dot) 1.5px, transparent 1.5px);
  background-size: 6px 6px;
  opacity: 0.7;
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--brand-emerald);
  box-shadow: 0 16px 40px -4px var(--brand-emerald-glow), inset 0 0 16px rgba(16, 185, 129, 0.12);
}

.pricing-card:hover::before, .pricing-card:hover::after {
  opacity: 1;
  background-color: rgba(16, 185, 129, 0.08);
}

/* 推荐舱位高亮 */
.pricing-card.featured {
  border: 2px solid var(--brand-emerald);
  box-shadow: 0 12px 36px var(--brand-emerald-glow);
  background-color: var(--bg-surface-elevated);
}

.featured-ribbon {
  position: absolute;
  top: 0;
  right: 28px;
  background: var(--brand-gradient);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 14px;
  border-bottom-left-radius: 6px;
  border-bottom-right-radius: 6px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  box-shadow: 0 4px 12px var(--brand-emerald-glow);
}

.pricing-tier-tag {
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--brand-cyan);
  font-family: ui-monospace, monospace;
  margin-bottom: 6px;
}

.pricing-tier-name {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.pricing-tier-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-color);
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.price-amount {
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text-primary);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.price-period {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.pricing-feature strong {
  color: var(--text-primary);
}

.pricing-feature svg {
  width: 18px;
  height: 18px;
  color: var(--brand-emerald);
  flex-shrink: 0;
}

/* ==========================================================================
   用户评价与常见问题
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.review-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-emerald);
}

.review-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 16px;
  color: var(--star-color);
}

.review-text {
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
}

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--brand-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.author-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

/* FAQ 手风琴 */
.faq-container {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

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

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  gap: 16px;
}

.faq-icon-arrow {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast);
  color: var(--text-muted);
  flex-shrink: 0;
}

.faq-item.active .faq-icon-arrow {
  transform: rotate(180deg);
  color: var(--brand-emerald);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
  padding: 0 24px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 22px;
}

/* 底部 CTA 促进转化 */
.cta-banner-section {
  padding: 80px 0;
}

.cta-banner-box {
  background: var(--brand-gradient);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 36px var(--brand-emerald-glow);
}

.cta-banner-title {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #ffffff;
}

.cta-banner-desc {
  font-size: 1.15rem;
  max-width: 640px;
  margin: 0 auto 32px;
  opacity: 0.94;
  line-height: 1.6;
}

.btn-white {
  background-color: #ffffff;
  color: #065f46;
  font-weight: 800;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.btn-white:hover {
  background-color: #f8fafc;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

/* ==========================================================================
   页脚 (严格只保留四个指定标题，新窗口打开)
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  padding: 44px 0 36px;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-bottom: 20px;
  list-style: none;
}

.footer-link {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--brand-emerald);
}

.footer-copyright {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* 子页面样式 */
.subpage-hero {
  padding: 60px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-subtle);
}

.subpage-title {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}

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

.subpage-body {
  padding: 60px 0 90px;
  max-width: 860px;
  margin: 0 auto;
}

.doc-block {
  margin-bottom: 40px;
}

.doc-block-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.doc-block-content {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.doc-block-content ul, .doc-block-content ol {
  margin-left: 20px;
  margin-top: 10px;
  margin-bottom: 10px;
}

.doc-block-content li {
  margin-bottom: 8px;
}

.highlight-box {
  background-color: var(--badge-bg);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-left: 4px solid var(--brand-emerald);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin: 20px 0;
  color: var(--text-primary);
}

.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.sitemap-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sitemap-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
}

.sitemap-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sitemap-card a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.sitemap-card a:hover {
  color: var(--brand-emerald);
  padding-left: 4px;
}

/* ==========================================================================
   响应式适配 (@media 移动端单栏与微触控)
   ========================================================================== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .platform-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
  .sitemap-card {
    grid-column: auto !important;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    box-shadow: var(--shadow-lg);
    display: none;
    z-index: 999;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-link {
    font-size: 1.05rem;
    padding: 8px 0;
    width: 100%;
    text-align: center;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero-section {
    padding: 40px 0 32px;
  }

  .hero-title {
    font-size: 1.55rem;
    line-height: 1.35;
    word-break: normal;
  }

  .hero-title-line {
    display: inline;
    white-space: normal;
  }

  .hero-briefing {
    padding: 16px;
  }

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

  .hero-cta-group .btn {
    width: 100%;
    padding: 14px 20px;
  }

  .pneumatic-dispatch-container {
    padding: 16px 12px;
  }

  .tube-visual-wrapper {
    flex-direction: column;
    gap: 14px;
  }

  .tube-station {
    width: 100%;
  }

  .tube-acrylic-glass {
    width: 100%;
  }

  .trust-metrics-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    padding: 18px;
  }

  .metric-val {
    font-size: 1.45rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .showcase-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .cta-banner-box {
    padding: 40px 20px;
  }

  .cta-banner-title {
    font-size: 1.85rem;
  }

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

  .articles-grid {
    grid-template-columns: 1fr !important;
  }

  .article-toc {
    padding: 18px 16px;
  }
}

/* ==========================================================================
   深度 SEO 长文排版系统 (Article Reading & Typography Layout)
   ========================================================================== */
.article-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

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

.breadcrumb a:hover {
  color: var(--brand-emerald);
}

.breadcrumb-separator {
  color: var(--border-color);
}

.article-header-box {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.article-post-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.article-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

/* 文章目录 (Table of Contents) */
.article-toc {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--brand-emerald);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin-bottom: 40px;
  box-shadow: var(--shadow-sm);
}

.toc-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.toc-item {
  font-size: 0.95rem;
}

.toc-link {
  color: var(--text-secondary);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  display: inline-block;
}

.toc-link:hover {
  color: var(--brand-emerald);
  padding-left: 4px;
}

.toc-sublist {
  list-style: none;
  padding-left: 20px;
  margin-top: 6px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.toc-sublist .toc-link {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.toc-sublist .toc-link:hover {
  color: var(--brand-emerald);
}

/* 正文排版 */
.article-content {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.85;
}

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

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 32px;
  margin-bottom: 14px;
  scroll-margin-top: 90px;
}

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

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

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

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

.article-content a {
  color: var(--brand-emerald);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-content a:hover {
  color: var(--brand-cyan);
}

/* 表格排版 */
.data-table-wrapper {
  overflow-x: auto;
  margin: 28px 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
  background-color: var(--bg-surface);
}

.data-table th {
  background-color: var(--bg-subtle);
  color: var(--text-primary);
  font-weight: 700;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

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

.data-table tr:hover td {
  background-color: rgba(16, 185, 129, 0.04);
}

/* 相关阅读网格 */
.related-reading-section {
  margin-top: 60px;
  padding-top: 36px;
  border-top: 1px solid var(--border-color);
}

.related-title {
  font-size: 1.4rem;
  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 {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: var(--brand-emerald);
}

.related-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.related-card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
  flex-grow: 1;
}

@media (max-width: 768px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
  .article-post-title {
    font-size: 1.85rem;
  }
}