/* ==========================================================
   EDGE-XJC UTILITY NETWORK - 日系都市机能与工装风 浅色系样式表
   JAPANESE URBAN UTILITY & WORKWEAR LIGHT THEME
   Domain: edge-xjc.my | System Ver: 4.8.2-PROD
   ========================================================== */

:root {
  /* 基础色盘 - 浅色工装纸感与混凝土灰 */
  --bg-body: #f5f7fa;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #fafbfd;
  --bg-subtle: #edf1f7;
  --bg-card-hover: #fcfdfe;
  
  /* 战术机能强调色 */
  --accent-orange: #ff5500;       /* 救援警示橙 / Rescue Safety Orange */
  --accent-orange-hover: #e64d00;
  --accent-orange-soft: rgba(255, 85, 0, 0.08);
  --accent-orange-glow: rgba(255, 85, 0, 0.25);
  
  --accent-cyan: #0284c7;         /* 航电信号蓝 / Signal Cyan */
  --accent-cyan-soft: rgba(2, 132, 199, 0.08);
  
  --accent-olive: #3f5144;        /* 工装军绿 / Tactical Olive */
  --accent-green: #10b981;        /* 正常运行 / Operational Green */
  --accent-yellow: #f59e0b;       /* 预警黄色 / Warning Amber */
  
  /* 文本灰阶 */
  --text-primary: #121824;        /* 工业炭黑 / Tactical Carbon */
  --text-secondary: #4b586d;      /* 工业铅灰 / Slate Muted */
  --text-tertiary: #8391a5;       /* 标注浅灰 / Light Technical Grey */
  --text-inverse: #ffffff;
  
  /* 线条与边缘 */
  --border-light: #e1e7f0;        /* 精密细线 / Hairline Spec */
  --border-medium: #cbd5e1;
  --border-dark: #121824;
  --border-accent: rgba(255, 85, 0, 0.4);
  
  /* 字体族 */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  
  /* 视觉投影与倒角 */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --shadow-sm: 0 1px 3px rgba(18, 24, 36, 0.04), 0 1px 2px rgba(18, 24, 36, 0.02);
  --shadow-md: 0 4px 16px -2px rgba(18, 24, 36, 0.06), 0 2px 6px -1px rgba(18, 24, 36, 0.03);
  --shadow-lg: 0 12px 32px -4px rgba(18, 24, 36, 0.08), 0 4px 12px -2px rgba(18, 24, 36, 0.04);
  --shadow-orange: 0 6px 20px -2px rgba(255, 85, 0, 0.35);

  --container-max: 1240px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
}

/* 机能风格精密背景点阵与坐标纹理 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  background-image: 
    radial-gradient(rgba(18, 24, 36, 0.08) 1px, transparent 1px),
    linear-gradient(to right, rgba(225, 231, 240, 0.35) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(225, 231, 240, 0.35) 1px, transparent 1px);
  background-size: 32px 32px, 128px 128px, 128px 128px;
  background-position: 0 0, 0 0, 0 0;
  opacity: 0.85;
}

/* 顶部动态环境画布 */
#ambient-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

/* 内容层级置于背景画布之上 */
header, main, footer, section {
  position: relative;
  z-index: 2;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

/* 通用容器 */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* 机能徽标与字体修饰 */
.mono {
  font-family: var(--font-mono);
}

.tech-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: var(--radius-xs);
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  color: var(--text-secondary);
  font-weight: 600;
}

.tech-tag.orange {
  background: var(--accent-orange-soft);
  border-color: var(--accent-orange);
  color: var(--accent-orange);
}

.tech-tag.cyan {
  background: var(--accent-cyan-soft);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.tech-tag.green {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--accent-green);
  color: var(--accent-green);
}

/* 工装机能风警示斜纹 */
.hazard-stripe {
  background: repeating-linear-gradient(
    -45deg,
    var(--accent-orange),
    var(--accent-orange) 6px,
    #121824 6px,
    #121824 12px
  );
  height: 3px;
  width: 100%;
}

/* 按钮规范 - 工装机能风格 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  text-transform: uppercase;
}

.btn-primary {
  background: var(--accent-orange);
  color: #ffffff;
  border: 1px solid var(--accent-orange);
  box-shadow: var(--shadow-orange);
}

.btn-primary:hover {
  background: var(--accent-orange-hover);
  border-color: var(--accent-orange-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px -2px rgba(255, 85, 0, 0.45);
  color: #ffffff;
}

.btn-primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: skewX(-20deg);
  transition: left 0.75s ease;
}

.btn-primary:hover::after {
  left: 150%;
}

.btn-outline {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
  background: var(--bg-subtle);
  border-color: var(--text-primary);
  transform: translateY(-2px);
}

.btn-dark {
  background: var(--text-primary);
  color: #ffffff;
  border: 1px solid var(--text-primary);
}

.btn-dark:hover {
  background: #253041;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: #ffffff;
}

/* 机能卡片外壳带十字准心和标尺角标 */
.utility-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 28px;
  position: relative;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-sm);
}

.utility-card:hover {
  border-color: var(--border-medium);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.utility-card::before,
.utility-card::after {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-tertiary);
  pointer-events: none;
  line-height: 1;
}

.utility-card::before {
  content: "+";
  top: 6px;
  left: 6px;
}

.utility-card::after {
  content: "+";
  bottom: 6px;
  right: 6px;
}

/* 顶部导航栏 - 工装战术仪表感 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 1px 4px rgba(18, 24, 36, 0.03);
}

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

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

.logo-badge {
  width: 36px;
  height: 36px;
  background: var(--text-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 1rem;
  border-radius: var(--radius-xs);
  position: relative;
  border: 1px solid #000;
}

.logo-badge::after {
  content: "";
  position: absolute;
  bottom: -2px;
  right: -2px;
  width: 6px;
  height: 6px;
  background: var(--accent-orange);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-title span {
  color: var(--accent-orange);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-tertiary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-xs);
  transition: all 0.2s ease;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav-link::before {
  content: "//";
  color: var(--text-tertiary);
  font-size: 0.72rem;
  opacity: 0.5;
  transition: opacity 0.2s;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-orange);
  background: var(--accent-orange-soft);
}

.nav-link:hover::before, .nav-link.active::before {
  opacity: 1;
  color: var(--accent-orange);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  height: 32px;
  justify-content: center;
  align-items: center;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xs);
  background: var(--bg-surface);
}

.mobile-toggle span {
  width: 18px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.2s ease;
}

/* 英雄区 (HERO SECTION) */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.live-pulse {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-green);
  background: rgba(16, 185, 129, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-xs);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  background: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  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: 3.2rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 22px;
}

.hero-title .highlight {
  color: var(--accent-orange);
  position: relative;
  display: inline-block;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 600px;
}

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

.hero-spec-specs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 24px;
  border-top: 1px dashed var(--border-medium);
}

.spec-item {
  display: flex;
  flex-direction: column;
}

.spec-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
}

.spec-label {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  text-transform: uppercase;
  margin-top: 4px;
}

/* 英雄区右侧：工装机能战术控制台预览 */
.hero-terminal {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
}

.terminal-header {
  background: #18202c;
  color: #fff;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

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

.terminal-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #3b4759;
}

.terminal-dot.red { background: #ef4444; }
.terminal-dot.yellow { background: #f59e0b; }
.terminal-dot.green { background: #10b981; }

.terminal-title {
  color: #94a3b8;
  letter-spacing: 0.08em;
}

.terminal-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: #fafbfd;
}

.terminal-metric-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
}

.metric-name {
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.metric-stat {
  font-weight: 700;
  color: var(--text-primary);
}

.metric-stat.green { color: var(--accent-green); }
.metric-stat.orange { color: var(--accent-orange); }
.metric-stat.cyan { color: var(--accent-cyan); }

.terminal-radar {
  margin-top: 16px;
  padding: 14px;
  background: var(--bg-surface);
  border: 1px dashed var(--border-medium);
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.radar-label {
  font-size: 0.68rem;
  color: var(--text-tertiary);
}

.radar-val {
  font-weight: 800;
  font-size: 1.05rem;
  margin-top: 2px;
}

/* 分区通用头部 */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-orange);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 板块通用间距 */
.section {
  padding: 90px 0;
  position: relative;
}

.section.alt-bg {
  background: #f0f4f9;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

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

.feature-card {
  display: flex;
  flex-direction: column;
}

.feature-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.feature-icon-wrapper {
  width: 48px;
  height: 48px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-orange);
}

.feature-code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-tertiary);
  font-weight: 700;
}

.feature-title {
  font-size: 1.22rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 16px;
  flex-grow: 1;
}

.feature-footer {
  padding-top: 14px;
  border-top: 1px dashed var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* 节点延迟和状态板块 (NODE STATUS) */
.node-status-board {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.board-top-controls {
  padding: 18px 24px;
  background: #f8fafc;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.board-summary {
  display: flex;
  align-items: center;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.node-table-wrapper {
  overflow-x: auto;
}

.node-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.node-table th {
  background: #f1f5f9;
  padding: 14px 20px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-medium);
}

.node-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
}

.node-table tr:hover td {
  background: #f8faff;
}

.node-name-cell {
  display: flex;
  align-items: center;
  gap: 12px;
}

.node-flag {
  font-size: 1.3rem;
  line-height: 1;
}

.node-title-group {
  display: flex;
  flex-direction: column;
}

.node-main-title {
  font-weight: 700;
  color: var(--text-primary);
}

.node-spec-sub {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-tertiary);
}

.ping-bar-container {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
}

.ping-indicator {
  width: 60px;
  height: 6px;
  background: #e2e8f0;
  border-radius: 3px;
  overflow: hidden;
}

.ping-fill {
  height: 100%;
  border-radius: 3px;
}

.ping-fast { background: var(--accent-green); width: 85%; }
.ping-medium { background: var(--accent-cyan); width: 65%; }
.ping-normal { background: var(--accent-yellow); width: 45%; }

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 600;
}

.status-pill.online {
  background: rgba(16, 185, 129, 0.12);
  color: #047857;
}

.status-pill.online::before {
  content: "";
  width: 6px;
  height: 6px;
  background: #10b981;
  border-radius: 50%;
}

/* 套餐价格板块 (PRICING SECTION) */
.pricing-switch-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 48px;
}

.pricing-switch {
  display: inline-flex;
  align-items: center;
  background: var(--bg-subtle);
  border: 1px solid var(--border-medium);
  padding: 4px;
  border-radius: var(--radius-xs);
}

.switch-btn {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: var(--radius-xs);
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.switch-btn.active {
  background: var(--text-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.pricing-card {
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 32px 24px;
  transition: all 0.3s ease;
}

.pricing-card.featured {
  border-color: var(--accent-orange);
  box-shadow: 0 12px 36px -4px rgba(255, 85, 0, 0.18), var(--shadow-md);
  transform: translateY(-8px);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-orange);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 3px 12px;
  border-radius: var(--radius-xs);
  text-transform: uppercase;
}

.pricing-header {
  margin-bottom: 24px;
  text-align: center;
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.plan-desc {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.price-box {
  margin: 20px 0 10px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.amount {
  font-family: var(--font-mono);
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
}

.period {
  font-size: 0.82rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.pricing-features {
  list-style: none;
  margin: 24px 0 32px;
  padding: 20px 0;
  border-top: 1px dashed var(--border-light);
  border-bottom: 1px dashed var(--border-light);
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.check-icon {
  color: var(--accent-green);
  font-size: 0.95rem;
  line-height: 1;
  margin-top: 2px;
}

.pricing-card .btn {
  width: 100%;
}

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

.review-card {
  display: flex;
  flex-direction: column;
}

.review-rating {
  display: flex;
  align-items: center;
  gap: 3px;
  color: #f59e0b;
  margin-bottom: 14px;
  font-size: 0.9rem;
}

.review-content {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
  font-style: normal;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 16px;
  border-top: 1px dashed var(--border-light);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-xs);
  background: var(--bg-subtle);
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 800;
  color: var(--text-primary);
  font-size: 0.95rem;
}

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

.author-name {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.author-role {
  font-size: 0.74rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

/* 常见问题板块 (FAQ ACCORDION) */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all 0.2s ease;
}

.faq-item.active {
  border-color: var(--accent-orange);
  box-shadow: var(--shadow-sm);
}

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

.faq-question:hover {
  color: var(--accent-orange);
}

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

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--accent-orange);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 24px 20px;
}

/* 知识库与教程板块 (KNOWLEDGE BASE & TUTORIALS) */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-orange);
  box-shadow: var(--shadow-md);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-tertiary);
}

.article-title {
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.45;
  margin-bottom: 12px;
  transition: color 0.2s ease;
}

.article-card:hover .article-title {
  color: var(--accent-orange);
}

.article-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-footer {
  padding-top: 14px;
  border-top: 1px dashed var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.read-more-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-orange);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.read-more-link:hover {
  text-decoration: underline;
}

/* 转化横幅 (FINAL CONVERSION BANNER) */
.cta-banner {
  background: #121824;
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 60px 48px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid #232d3d;
  box-shadow: var(--shadow-lg);
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 400px;
  height: 100%;
  background: radial-gradient(circle at center, rgba(255, 85, 0, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.cta-banner-content {
  max-width: 650px;
  position: relative;
  z-index: 2;
}

.cta-title {
  font-size: 2.2rem;
  font-weight: 900;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 14px;
}

.cta-desc {
  font-size: 1.05rem;
  color: #94a3b8;
  line-height: 1.6;
  margin-bottom: 0;
}

.cta-actions {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 16px;
  flex-shrink: 0;
}

/* 底部区域 (FOOTER) */
.site-footer {
  background: #f1f4f9;
  border-top: 1px solid var(--border-medium);
  padding: 70px 0 30px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}

.footer-col-brand .brand-logo {
  margin-bottom: 16px;
}

.footer-brand-desc {
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 20px;
  max-width: 320px;
}

.footer-title {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 6px;
}

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

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.86rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent-orange);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-tertiary);
}

/* 文章详情页专用排版样式 (ARTICLE DETAIL PAGE STYLES) */
.article-header-section {
  padding: 60px 0 30px;
  background: #ffffff;
  border-bottom: 1px solid var(--border-light);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-tertiary);
  margin-bottom: 20px;
}

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

.breadcrumb a:hover {
  color: var(--accent-orange);
}

.article-page-title {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.article-page-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding-bottom: 16px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  padding: 48px 0 80px;
}

.article-body {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 44px;
  font-size: 1.02rem;
  line-height: 1.85;
  color: #24292f;
  box-shadow: var(--shadow-sm);
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--bg-subtle);
  position: relative;
}

.article-body h2::before {
  content: "§ ";
  color: var(--accent-orange);
  font-family: var(--font-mono);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 26px 0 12px;
}

.article-body p {
  margin-bottom: 18px;
}

.article-body ul, .article-body ol {
  margin: 16px 0 20px 24px;
}

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

.article-body blockquote {
  background: #f8fafc;
  border-left: 4px solid var(--accent-orange);
  padding: 16px 20px;
  margin: 24px 0;
  color: var(--text-secondary);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
  font-size: 0.95rem;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.9rem;
}

.article-body th, .article-body td {
  border: 1px solid var(--border-medium);
  padding: 10px 14px;
  text-align: left;
}

.article-body th {
  background: #f1f5f9;
  font-weight: 700;
}

.article-body code {
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: var(--accent-orange);
}

.article-body pre {
  background: #1e2633;
  color: #e2e8f0;
  padding: 18px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 20px 0;
  font-family: var(--font-mono);
  font-size: 0.86rem;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.sidebar-box-title {
  font-size: 0.96rem;
  font-weight: 800;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.sidebar-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.86rem;
}

.sidebar-links a {
  color: var(--text-secondary);
  line-height: 1.45;
}

.sidebar-links a:hover {
  color: var(--accent-orange);
}

/* 响应式适配 */
@media (max-width: 1080px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .features-grid,
  .reviews-grid,
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-actions .btn-outline {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .hero-title {
    font-size: 2.3rem;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .features-grid,
  .reviews-grid,
  .articles-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .cta-banner {
    flex-direction: column;
    padding: 36px 24px;
    text-align: center;
    gap: 24px;
  }
  .hero-spec-specs {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .article-body {
    padding: 24px 18px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}