@charset "UTF-8";
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,400;0,600;0,700;1,400&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

:root {
  --bg-color: #f0f0f0;
  --bg-subtle: #e6e6e6;
  --text-color: #0a0a0a;
  --text-muted: #4a4a4a;
  --accent-yellow: #ffb800;
  --accent-yellow-light: #fff2cc;
  --accent-yellow-dark: #cc9300;
  --terminal-bg: #0a0a0a;
  --terminal-fg: #f5f5f5;
  --border-line: #0a0a0a;
  --grid-line: #d2d2d2;
  --status-green: #059669;
  --status-green-glow: rgba(5, 150, 105, 0.35);
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

/* 工业扫描线与工程网格背景 */
body {
  background-color: var(--bg-color);
  background-image: 
    linear-gradient(to right, rgba(0, 0, 0, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 0, 0, 0.05) 1px, transparent 1px),
    repeating-linear-gradient(0deg, rgba(0, 0, 0, 0.012) 0px, rgba(0, 0, 0, 0.012) 2px, transparent 2px, transparent 4px);
  background-size: 40px 40px, 40px 40px, 100% 4px;
  min-height: 100vh;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

/* 基础工程技术排版 */
.mono-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.mono-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 8px;
  border: 1px solid var(--border-line);
  background-color: var(--accent-yellow);
  color: #0a0a0a;
}

.mono-tag.dark {
  background-color: #0a0a0a;
  color: #ffb800;
}

.blueprint-box {
  position: relative;
  border: 1px solid var(--border-line);
  background: #ffffff;
}

/* 蓝图式角标十字与括号 */
.blueprint-corner {
  position: relative;
}
.blueprint-corner::before,
.blueprint-corner::after {
  content: '+';
  position: absolute;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--border-line);
  line-height: 1;
  pointer-events: none;
}
.blueprint-corner::before {
  top: -7px;
  left: -6px;
}
.blueprint-corner::after {
  bottom: -7px;
  right: -6px;
}

/* 布局容器 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ================= 导航栏 (NAVBAR) - 工业高精度仪表中枢 ================= */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 999;
  background-color: rgba(240, 240, 240, 0.94);
  backdrop-filter: blur(14px) saturate(180%);
  border-top: 3px solid var(--accent-yellow);
  border-bottom: 2px solid var(--border-line);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
  position: relative;
}

/* 品牌与状态区 */
.nav-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background-color: #0a0a0a;
  color: var(--accent-yellow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 1.25rem;
  border: 2px solid var(--border-line);
  box-shadow: 2px 2px 0 var(--accent-yellow);
  position: relative;
  transition: transform 0.15s ease;
}

.brand-icon:hover {
  transform: rotate(-3deg) scale(1.05);
}

.brand-meta {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-title {
  font-family: var(--font-mono);
  font-size: 1.28rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #0a0a0a;
}

.brand-domain {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* 遥测状态微型胶囊 */
.nav-telemetry {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 4px 10px;
  background: #ffffff;
  border: 1px solid var(--border-line);
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.06);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--status-green);
  box-shadow: 0 0 0 0 var(--status-green-glow);
  animation: pulseAnimation 2s infinite;
  flex-shrink: 0;
}

@keyframes pulseAnimation {
  0% {
    box-shadow: 0 0 0 0 rgba(5, 150, 105, 0.7);
  }
  70% {
    box-shadow: 0 0 0 6px rgba(5, 150, 105, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(5, 150, 105, 0);
  }
}

/* 移动端汉堡切换器 (纯CSS实现) */
.nav-toggle-checkbox {
  display: none;
}

.nav-toggle-label {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: #ffffff;
  border: 2px solid var(--border-line);
  box-shadow: 2px 2px 0 var(--border-line);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
}

.toggle-icon-bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.toggle-icon-bar {
  width: 16px;
  height: 2px;
  background-color: #0a0a0a;
  transition: all 0.2s ease;
}

/* 核心导航链接区 (工业中控 Dock 风格) */
.nav-menu-wrapper {
  display: flex;
  align-items: center;
}

.nav-links {
  display: inline-flex;
  align-items: center;
  list-style: none;
  background: #ffffff;
  border: 2px solid var(--border-line);
  box-shadow: 3px 3px 0 var(--border-line);
  padding: 3px;
  gap: 2px;
}

.nav-link-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 600;
  color: #1a1a1a;
  padding: 7px 12px;
  transition: all 0.15s ease;
  position: relative;
  text-decoration: none;
  white-space: nowrap;
}

.nav-seq {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  color: #777777;
  background: rgba(0, 0, 0, 0.05);
  padding: 1px 4px;
  line-height: 1.2;
}

.nav-link-item:hover {
  background-color: var(--accent-yellow);
  color: #0a0a0a;
}

.nav-link-item:hover .nav-seq {
  background-color: #0a0a0a;
  color: var(--accent-yellow);
}

.nav-link-special {
  background-color: #f7f7f7;
  border-left: 1px dashed #cccccc;
}

.nav-tag-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 800;
  background-color: var(--accent-yellow);
  color: #0a0a0a;
  padding: 1px 4px;
  border: 1px solid var(--border-line);
  line-height: 1.2;
}

.nav-link-special:hover .nav-tag-badge {
  background-color: #0a0a0a;
  color: var(--accent-yellow);
}

/* 移动端菜单底部信息 (桌面端默认隐藏) */
.mobile-menu-footer {
  display: none;
}

/* 右侧 CTA 按钮 */
.nav-actions {
  display: flex;
  align-items: center;
}

.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.88rem;
  padding: 9px 18px;
  background-color: var(--accent-yellow);
  color: #0a0a0a;
  border: 2px solid var(--border-line);
  box-shadow: 3px 3px 0 var(--border-line);
  cursor: pointer;
  transition: all 0.12s ease;
  white-space: nowrap;
  text-decoration: none;
}

.btn-nav-cta:hover {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--border-line);
  background-color: #ffc425;
}

.btn-nav-cta:active {
  transform: translate(3px, 3px);
  box-shadow: 0 0 0 var(--border-line);
}

/* ================= 按钮体系 ================= */
.btn-industrial {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 12px 24px;
  background-color: var(--accent-yellow);
  color: #0a0a0a;
  border: 2px solid var(--border-line);
  box-shadow: 4px 4px 0 var(--border-line);
  cursor: pointer;
  transition: all 0.12s ease;
  text-align: center;
  line-height: 1.2;
}

.btn-industrial:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--border-line);
  background-color: #ffc425;
}

.btn-industrial:active {
  transform: translate(4px, 4px);
  box-shadow: 0 0 0 var(--border-line);
}

.btn-industrial.secondary {
  background-color: #ffffff;
  color: #0a0a0a;
}

.btn-industrial.secondary:hover {
  background-color: #f7f7f7;
}

.btn-industrial.dark {
  background-color: #0a0a0a;
  color: #ffffff;
  border-color: #0a0a0a;
}

.btn-industrial.dark:hover {
  background-color: #222222;
}

/* ================= 主视觉 HERO SECTION ================= */
.hero-section {
  padding: 50px 0 60px 0;
  border-bottom: 2px solid var(--border-line);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 32px;
  align-items: stretch;
}

.hero-main {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
  color: #0a0a0a;
}

.hero-title .brand-highlight {
  background: linear-gradient(180deg, transparent 65%, var(--accent-yellow) 65%);
  display: inline-block;
  padding: 0 4px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 28px;
  max-width: 620px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 30px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding-top: 20px;
  border-top: 1px dashed var(--grid-line);
}

.metric-item {
  background: #ffffff;
  border: 1px solid var(--border-line);
  padding: 10px 14px;
}

.metric-number {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: #0a0a0a;
  line-height: 1.2;
}

.metric-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Hero 右侧终端与技术面板 */
.hero-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.terminal-panel {
  background-color: var(--terminal-bg);
  color: var(--terminal-fg);
  border: 2px solid var(--border-line);
  box-shadow: 6px 6px 0 var(--border-line);
  font-family: var(--font-mono);
  overflow: hidden;
}

.terminal-header {
  background-color: #1a1a1a;
  padding: 8px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #333333;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.dot-red { background-color: #ef4444; }
.dot-yellow { background-color: #eab308; }
.dot-green { background-color: #22c55e; }

.terminal-title {
  font-size: 0.72rem;
  color: #a3a3a3;
  letter-spacing: 0.05em;
}

.terminal-body {
  padding: 16px;
  font-size: 0.82rem;
  line-height: 1.7;
}

.term-cmd {
  color: var(--accent-yellow);
  font-weight: 600;
}

.term-out {
  color: #94a3b8;
}

.term-success {
  color: #34d399;
}

.cursor-blink {
  display: inline-block;
  width: 8px;
  height: 15px;
  background-color: var(--accent-yellow);
  vertical-align: text-bottom;
  animation: cursorBlink 1s infinite;
}

@keyframes cursorBlink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

.tech-spec-box {
  background: #ffffff;
  border: 2px solid var(--border-line);
  padding: 16px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.spec-table td {
  padding: 7px 4px;
  border-bottom: 1px dashed var(--grid-line);
}

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

.spec-key {
  color: var(--text-muted);
  width: 40%;
}

.spec-val {
  font-weight: 600;
  text-align: right;
  color: #0a0a0a;
}

/* ================= 官方合作优惠条与生态导流组件 ================= */
.official-partner-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #0a0a0a;
  color: var(--accent-yellow);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  padding: 4px 10px;
  border: 1px solid var(--accent-yellow);
}

.promo-coupon-bar {
  background: #ffffff;
  border: 2px solid var(--border-line);
  box-shadow: 4px 4px 0 var(--border-line);
  padding: 18px 24px;
  margin-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.coupon-code-pill {
  font-family: var(--font-mono);
  background: var(--accent-yellow);
  color: #0a0a0a;
  font-weight: 800;
  font-size: 1.1rem;
  padding: 4px 12px;
  border: 1px solid var(--border-line);
  letter-spacing: 0.05em;
  display: inline-block;
}

.partner-hub-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 24px;
}

.partner-hub-card {
  background: #ffffff;
  border: 2px solid var(--border-line);
  box-shadow: 4px 4px 0 var(--border-line);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.15s ease;
  text-decoration: none;
  color: inherit;
}

.partner-hub-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--border-line);
  background: #fffdf5;
}

@media (max-width: 992px) {
  .partner-hub-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .partner-hub-grid {
    grid-template-columns: 1fr;
  }
}

/* ================= 通用区块标题 ================= */
.section-wrapper {
  padding: 60px 0;
  border-bottom: 2px solid var(--border-line);
}

.section-header {
  margin-bottom: 36px;
  position: relative;
}

.section-pretitle {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #0a0a0a;
  line-height: 1.25;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  margin-top: 8px;
  max-width: 720px;
}

/* ================= 核心优势 3卡片 ================= */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: #ffffff;
  border: 2px solid var(--border-line);
  box-shadow: 4px 4px 0 var(--border-line);
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.feature-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--border-line);
}

.card-header-bar {
  background: var(--bg-color);
  border-bottom: 1px solid var(--border-line);
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
}

.card-body {
  padding: 24px 20px;
  flex: 1;
}

.feature-icon-box {
  width: 48px;
  height: 48px;
  background-color: var(--accent-yellow);
  border: 1px solid var(--border-line);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 800;
  box-shadow: 2px 2px 0 var(--border-line);
}

.feature-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
}

.card-spec-list {
  background: var(--bg-subtle);
  border: 1px solid var(--border-line);
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.card-spec-item {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px dotted #bbbbbb;
}

.card-spec-item:last-child {
  border-bottom: none;
}

/* ================= 流媒体与AI支持图卡 ================= */
.media-ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.media-ai-card {
  background: #ffffff;
  border: 2px solid var(--border-line);
  box-shadow: 5px 5px 0 var(--border-line);
  padding: 28px;
  position: relative;
}

.card-category-tag {
  position: absolute;
  top: -12px;
  left: 20px;
  background: #0a0a0a;
  color: var(--accent-yellow);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border: 1px solid var(--border-line);
}

.media-ai-header {
  margin-top: 8px;
  margin-bottom: 16px;
}

.media-ai-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.service-badge-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.service-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border-line);
  background: #fafafa;
}

.service-symbol {
  width: 28px;
  height: 28px;
  background: #0a0a0a;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
}

.service-info {
  display: flex;
  flex-direction: column;
}

.service-name {
  font-weight: 700;
  font-size: 0.88rem;
}

.service-status {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--status-green);
}

/* ================= 套餐价格对比表 ================= */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: #ffffff;
  border: 2px solid var(--border-line);
  box-shadow: 4px 4px 0 var(--border-line);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.featured {
  border: 3px solid var(--border-line);
  box-shadow: 8px 8px 0 var(--border-line);
  transform: translateY(-6px);
}

.featured-ribbon {
  background-color: var(--accent-yellow);
  color: #0a0a0a;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.8rem;
  text-align: center;
  padding: 6px 0;
  border-bottom: 2px solid var(--border-line);
  letter-spacing: 0.05em;
}

.pricing-top {
  padding: 24px 20px 16px 20px;
  border-bottom: 1px solid var(--border-line);
}

.plan-name {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.price-display {
  display: flex;
  align-items: baseline;
  margin: 16px 0 6px 0;
}

.price-currency {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
}

.price-amount {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
}

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

.pricing-features {
  padding: 20px;
  list-style: none;
  flex: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.88rem;
  margin-bottom: 12px;
}

.pricing-check {
  font-family: var(--font-mono);
  font-weight: 700;
  color: #0a0a0a;
}

.pricing-footer {
  padding: 20px;
  border-top: 1px solid var(--border-line);
  background: var(--bg-subtle);
}

.pricing-footer .btn-industrial {
  width: 100%;
}

/* ================= 系统状态监控区 (SYSTEM STATUS MONITOR) ================= */
.monitor-panel {
  background: #ffffff;
  border: 2px solid var(--border-line);
  box-shadow: 6px 6px 0 var(--border-line);
  padding: 24px;
}

.monitor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--border-line);
  padding-bottom: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.monitor-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.monitor-summary-stats {
  display: flex;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.stat-pill {
  padding: 4px 10px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-line);
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.node-card {
  border: 1px solid var(--border-line);
  padding: 14px;
  background: #fafafa;
  font-family: var(--font-mono);
  transition: all 0.15s ease;
}

.node-card:hover {
  background: #ffffff;
  border-color: #0a0a0a;
  box-shadow: 3px 3px 0 var(--border-line);
}

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

.node-name {
  font-weight: 700;
  font-size: 0.9rem;
}

.node-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  color: var(--status-green);
  font-weight: 600;
}

.node-specs {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 8px;
  border-top: 1px dashed var(--grid-line);
  padding-top: 8px;
}

/* ================= 用户评价 ================= */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.testimonial-card {
  background: #ffffff;
  border: 2px solid var(--border-line);
  box-shadow: 4px 4px 0 var(--border-line);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testi-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--grid-line);
  padding-bottom: 10px;
}

.testi-user {
  font-weight: 700;
  font-size: 0.95rem;
}

.testi-role {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.testi-rating {
  font-family: var(--font-mono);
  color: #ff9900;
  font-size: 0.85rem;
}

.testi-content {
  font-size: 0.88rem;
  color: #2b2b2b;
  line-height: 1.6;
  margin-bottom: 16px;
}

.testi-footer {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #888888;
}

/* ================= 常见问题 (FAQ) ================= */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.faq-item {
  background: #ffffff;
  border: 2px solid var(--border-line);
  padding: 20px;
}

.faq-question {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.faq-q-tag {
  font-family: var(--font-mono);
  background: var(--accent-yellow);
  color: #0a0a0a;
  padding: 2px 6px;
  font-size: 0.8rem;
  border: 1px solid var(--border-line);
}

.faq-answer {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  padding-left: 28px;
}

/* ================= 页脚 (FOOTER) ================= */
.site-footer {
  background: #0a0a0a;
  color: #f5f5f5;
  border-top: 3px solid var(--accent-yellow);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 24px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 32px;
}

.footer-nav a {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: #f5f5f5;
  padding: 6px 14px;
  border: 1px solid #333333;
  background-color: #161616;
  transition: all 0.15s ease;
}

.footer-nav a:hover {
  background-color: var(--accent-yellow);
  color: #0a0a0a;
  border-color: var(--accent-yellow);
}

.footer-copyright {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #888888;
}

/* ================= 辅助内部文章页通用排版 ================= */
.subpage-wrapper {
  padding: 50px 0 80px 0;
}

.subpage-card {
  background: #ffffff;
  border: 2px solid var(--border-line);
  box-shadow: 6px 6px 0 var(--border-line);
  padding: 40px;
}

.subpage-header {
  border-bottom: 2px solid var(--border-line);
  padding-bottom: 24px;
  margin-bottom: 30px;
}

.subpage-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-top: 10px;
}

.subpage-content h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 28px 0 14px 0;
  border-left: 4px solid var(--accent-yellow);
  padding-left: 12px;
}

.subpage-content p {
  font-size: 0.98rem;
  line-height: 1.8;
  color: #2b2b2b;
  margin-bottom: 16px;
}

.subpage-content ul {
  margin-bottom: 20px;
  padding-left: 24px;
  line-height: 1.8;
}

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

/* ================= 响应式媒体查询 (RESPONSIVE @MEDIA) ================= */
@media (max-width: 1080px) {
  .nav-telemetry {
    display: none;
  }
}

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  .pricing-card.featured {
    transform: none;
  }
  .media-ai-grid {
    grid-template-columns: 1fr;
  }
  .node-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .faq-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .nav-toggle-label {
    display: inline-flex;
  }

  .nav-actions {
    display: none;
  }

  .nav-menu-wrapper {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    width: 100%;
    background-color: #ffffff;
    border-bottom: 3px solid var(--border-line);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.16);
    padding: 16px 20px 24px 20px;
    flex-direction: column;
    align-items: stretch;
    z-index: 1000;
  }

  .nav-toggle-checkbox:checked ~ .nav-menu-wrapper {
    display: flex;
    animation: menuSlideDown 0.22s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  }

  @keyframes menuSlideDown {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .nav-links {
    flex-direction: column;
    width: 100%;
    padding: 6px;
    gap: 4px;
    box-shadow: none;
    border: 1px solid var(--border-line);
    background: #fafafa;
  }

  .nav-link-item {
    width: 100%;
    justify-content: flex-start;
    padding: 12px 14px;
    font-size: 0.96rem;
    border-bottom: 1px solid #eeeeee;
  }

  .nav-link-item:last-child {
    border-bottom: none;
  }

  .nav-link-special {
    background-color: #fff9e6;
    border-left: none;
  }

  .mobile-menu-footer {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px dashed var(--grid-line);
  }

  .mobile-telemetry-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    padding: 8px 12px;
    background: var(--bg-color);
    border: 1px solid var(--grid-line);
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn-industrial {
    width: 100%;
  }
  .hero-metrics {
    grid-template-columns: 1fr;
  }
  .node-grid {
    grid-template-columns: 1fr;
  }
  .footer-nav {
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }
  .footer-nav a {
    width: 100%;
    text-align: center;
  }
  .subpage-card {
    padding: 24px 16px;
  }
}