/* ===================================================================
   鲤云 LiYun - 矩阵代码雨 · 鲤跃协议握手 · 终端美学样式库
   配色：主背景 #000000 | 主色 #10B981 (矩阵绿) | 次色 #FCD34D (鲤鱼黄)
   字体：JetBrains Mono (700 字重 / 等宽)
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,400;0,600;0,700;0,800;1,400&display=swap');

:root {
  --bg-black: #000000;
  --bg-card: rgba(4, 21, 13, 0.85);
  --bg-card-hover: rgba(6, 32, 20, 0.95);
  --bg-terminal: #04150d;
  
  --primary-green: #10B981;
  --secondary-yellow: #FCD34D;
  --green-dim: #059669;
  --green-dark: #064e3b;
  --green-light: #34d399;
  
  --border-green: rgba(16, 185, 129, 0.3);
  --border-green-bright: #10B981;
  --border-yellow: rgba(252, 211, 77, 0.4);
  
  --text-main: #10B981;
  --text-bright: #34d399;
  --text-accent: #FCD34D;
  --text-muted: #059669;
  
  --glow-green: 0 0 15px rgba(16, 185, 129, 0.5);
  --glow-green-lg: 0 0 25px rgba(16, 185, 129, 0.8);
  --glow-yellow: 0 0 15px rgba(252, 211, 77, 0.6);
  --glow-yellow-lg: 0 0 25px rgba(252, 211, 77, 0.9);
  
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Courier New", monospace;
  --radius-cta: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  
  --max-w: 1200px;
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-mono);
  background-color: var(--bg-black);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--bg-black);
  position: relative;
}

/* 无障碍键盘快速跳转主要内容 (Skip Link) */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--secondary-yellow);
  color: #000000;
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: var(--radius-cta);
  z-index: 9999;
  text-decoration: none;
  transition: top 0.2s ease;
  box-shadow: 0 0 15px rgba(252, 211, 77, 0.6);
}

.skip-link:focus {
  top: 20px;
  outline: 2px solid var(--primary-green);
}

/* 固定页眉防遮挡锚点偏移 (scroll-margin-top) */
#advantages, #services, #pricing, #reviews, #faq, #main, section[id] {
  scroll-margin-top: 80px;
}

/* 键盘可访问性清晰焦点轮廓 (Focus Visible) */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
.btn:focus-visible,
input:focus-visible {
  outline: 2px solid var(--secondary-yellow) !important;
  outline-offset: 3px !important;
}

/* 遵循系统的减弱动效偏好 (prefers-reduced-motion) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  #matrix-canvas, .pulse-svg-layer {
    display: none !important;
  }
}

/* 全屏 Canvas 矩阵代码雨与遮罩 */
#matrix-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* 底部黑色渐变遮罩淡出 */
.matrix-bottom-fade {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 350px;
  background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.8) 60%, #000000 100%);
  pointer-events: none;
  z-index: 1;
}

/* 鲤跃脉冲背景 SVG 动效 */
.pulse-svg-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.pulse-lightning-1 {
  position: absolute;
  top: 18%;
  right: 12%;
  width: 48px;
  height: 48px;
  color: var(--secondary-yellow);
  opacity: 0;
  animation: koiPulse 6s infinite ease-in-out;
}

.pulse-lightning-2 {
  position: absolute;
  top: 65%;
  left: 8%;
  width: 40px;
  height: 40px;
  color: var(--secondary-yellow);
  opacity: 0;
  animation: koiPulse 6.8s infinite 2.2s ease-in-out;
}

.pulse-koi {
  position: absolute;
  top: 42%;
  right: 22%;
  width: 120px;
  height: 80px;
  color: var(--secondary-yellow);
  opacity: 0;
  animation: koiPulse 6.2s infinite 1s ease-in-out;
}

@keyframes koiPulse {
  0%, 100% {
    opacity: 0;
    transform: scale(0.95);
  }
  15% {
    opacity: 0.9;
    filter: drop-shadow(0 0 16px #FCD34D);
    transform: scale(1.05);
  }
  25% {
    opacity: 0.2;
    transform: scale(1.02);
  }
  35% {
    opacity: 0.7;
    filter: drop-shadow(0 0 22px #FCD34D);
    transform: scale(1.04);
  }
  50% {
    opacity: 0;
    transform: scale(1);
  }
}

/* 内容层级置于背景之上 */
.site-header, .hero-section, .section, .cta-banner, .site-footer, .subpage-hero, .subpage-content {
  position: relative;
  z-index: 2;
}

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

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

/* ===================================================================
   导航栏 Header (终端黑绿风格)
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background-color: rgba(0, 0, 0, 0.92);
  border-bottom: 1px solid var(--border-green);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--primary-green);
  text-shadow: var(--glow-green);
}

.logo-badge {
  color: var(--secondary-yellow);
  text-shadow: var(--glow-yellow);
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-cta);
  background: #04150d;
  border: 1px solid var(--primary-green);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary-yellow);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: var(--text-main);
  font-size: 0.92rem;
  font-weight: 600;
  transition: var(--transition);
  padding: 4px 6px;
  border-bottom: 1px solid transparent;
}

.nav-links a:hover {
  color: var(--secondary-yellow);
  border-bottom-color: var(--secondary-yellow);
  text-shadow: var(--glow-yellow);
}

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

/* ===================================================================
   CTA 按钮：鲤鱼黄描边（无填充），hover 填充黄色 + 文字变黑，圆角 4px，终端光标
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-cta);
  transition: var(--transition);
  cursor: pointer;
  text-align: center;
  min-height: 46px;
  white-space: nowrap;
  position: relative;
}

/* 核心 CTA：黄描边，无填充，hover 填充黄色文字变黑，带终端光标 */
.btn-primary, .btn-secondary, .btn-outline {
  background: transparent;
  color: var(--secondary-yellow);
  border: 1px solid var(--secondary-yellow);
  box-shadow: 0 0 10px rgba(252, 211, 77, 0.25);
}

.btn-primary::after, .btn-secondary::after, .btn-outline::after {
  content: "_";
  display: inline-block;
  margin-left: 4px;
  animation: terminalBlink 1s steps(2, start) infinite;
  color: var(--secondary-yellow);
}

.btn-primary:hover, .btn-secondary:hover, .btn-outline:hover {
  background: var(--secondary-yellow);
  color: #000000;
  box-shadow: 0 0 20px rgba(252, 211, 77, 0.85);
  transform: translateY(-2px);
}

.btn-primary:hover::after, .btn-secondary:hover::after, .btn-outline:hover::after {
  color: #000000;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.86rem;
  min-height: 38px;
}

.btn-lg {
  padding: 14px 30px;
  font-size: 1.05rem;
  min-height: 50px;
}

.btn-block {
  width: 100%;
}

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

/* ===================================================================
   主视觉区 (Hero Section) 布局与双列终端
   =================================================================== */
.hero-section {
  padding: 70px 0 50px;
}

.hero-grid-wrapper {
  display: grid;
  grid-template-columns: 1.15fr 340px;
  gap: 36px;
  align-items: start;
}

.hero-left {
  display: flex;
  flex-direction: column;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  color: var(--primary-green);
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 20px;
  width: fit-content;
  text-shadow: var(--glow-green);
}

.hero-tag-dot {
  width: 8px;
  height: 8px;
  background-color: var(--primary-green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--primary-green);
}

/* 左侧 H1：JetBrains Mono 等宽字体，700字重，绿色发光文字阴影 + 闪烁光标，“云”字鲤鱼黄色 + 黄色发光阴影 */
.hero-title {
  font-family: var(--font-mono);
  font-size: 3.1rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: -1px;
}

.hero-h1-green {
  color: var(--primary-green);
  text-shadow: 0 0 20px rgba(16, 185, 129, 0.8), 0 0 40px rgba(16, 185, 129, 0.4);
}

.hero-h1-yellow {
  color: var(--secondary-yellow);
  text-shadow: 0 0 20px rgba(252, 211, 77, 0.85), 0 0 40px rgba(252, 211, 77, 0.5);
}

.blinking-cursor {
  display: inline-block;
  color: var(--primary-green);
  animation: terminalBlink 1s steps(2, start) infinite;
  text-shadow: var(--glow-green);
  margin-left: 2px;
}

.hero-subtitle {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-bright);
  margin-bottom: 22px;
}

/* 服务简介 */
.hero-intro-box {
  background: var(--bg-card);
  border: 1px solid var(--border-green);
  border-left: 4px solid var(--primary-green);
  border-radius: var(--radius-cta);
  padding: 16px 20px;
  margin-bottom: 26px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.6);
}

.hero-intro-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px;
  border-radius: var(--radius-cta);
  background: rgba(16, 185, 129, 0.15);
  color: var(--secondary-yellow);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 8px;
  border: 1px solid rgba(252, 211, 77, 0.3);
}

.hero-intro-text {
  font-size: 0.92rem;
  color: #a7f3d0;
  line-height: 1.7;
}

.hero-intro-text strong {
  color: var(--secondary-yellow);
}

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

/* 核心指标状态栏 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  padding: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
}

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

.stat-value {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--primary-green);
  text-shadow: var(--glow-green);
  margin-bottom: 2px;
}

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

/* ===================================================================
   右侧 340px 终端窗口动画 (深绿底 + 绿色边框 + 三个绿色圆点)
   =================================================================== */
.hero-right {
  display: flex;
  flex-direction: column;
  width: 340px;
}

.terminal-window {
  width: 340px;
  background-color: var(--bg-terminal);
  border: 1px solid var(--primary-green);
  border-radius: var(--radius-cta);
  box-shadow: 0 0 25px rgba(16, 185, 129, 0.35), inset 0 0 15px rgba(16, 185, 129, 0.1);
  overflow: hidden;
  font-family: var(--font-mono);
}

.terminal-header {
  background-color: rgba(6, 78, 59, 0.6);
  border-bottom: 1px solid var(--border-green);
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--primary-green);
  box-shadow: 0 0 6px var(--primary-green);
}

.terminal-title {
  font-size: 0.76rem;
  color: var(--primary-green);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.terminal-body {
  padding: 16px 14px;
  min-height: 240px;
  font-size: 0.84rem;
  line-height: 1.65;
  color: var(--text-bright);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.term-line-cmd {
  color: var(--secondary-yellow);
  font-weight: 700;
}

.term-line-ok {
  color: var(--primary-green);
}

.term-line-koi {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--secondary-yellow);
  margin-top: 4px;
}

.term-koi-icon {
  width: 18px;
  height: 18px;
  animation: koiPulseMini 1.2s infinite ease-in-out;
  color: var(--secondary-yellow);
}

@keyframes koiPulseMini {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 3px #FCD34D); }
  50% { transform: scale(1.2); filter: drop-shadow(0 0 10px #FCD34D); }
}

.terminal-status-readout {
  margin-top: 10px;
  font-size: 0.76rem;
  color: var(--primary-green);
  text-shadow: var(--glow-green);
  background: rgba(0, 0, 0, 0.8);
  border: 1px dashed var(--border-green);
  border-radius: var(--radius-cta);
  padding: 8px 10px;
  text-align: center;
  letter-spacing: 0.5px;
}

/* ===================================================================
   通用 Section 样式 (终端矩阵绿风格)
   =================================================================== */
.section {
  padding: 60px 0;
}

.section-alt {
  background-color: rgba(2, 18, 10, 0.4);
  border-top: 1px solid var(--border-green);
  border-bottom: 1px solid var(--border-green);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 40px;
}

.section-label {
  display: inline-block;
  color: var(--secondary-yellow);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 8px;
  text-shadow: var(--glow-yellow);
}

.section-title {
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 12px;
  color: var(--primary-green);
  text-shadow: var(--glow-green);
}

.text-gradient {
  color: var(--secondary-yellow);
  text-shadow: var(--glow-yellow);
}

.section-desc {
  font-size: 0.95rem;
  color: var(--text-bright);
  line-height: 1.6;
}

/* ===================================================================
   产品核心优势 (3个图文卡片)
   =================================================================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.advantage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  padding: 30px 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.advantage-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-green);
  box-shadow: 0 0 25px rgba(16, 185, 129, 0.35);
}

.card-icon-box {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-cta);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid var(--primary-green);
  color: var(--secondary-yellow);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
}

.advantage-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-green);
  margin-bottom: 10px;
}

.advantage-card p {
  color: #a7f3d0;
  font-size: 0.9rem;
  line-height: 1.65;
  margin-bottom: 18px;
}

.advantage-bullets {
  list-style: none;
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 1px solid var(--border-green);
  padding-top: 16px;
}

.advantage-bullets li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: #cbd5e1;
}

.bullet-check {
  color: var(--secondary-yellow);
  font-weight: bold;
}

/* ===================================================================
   流媒体与 AI 支持图卡
   =================================================================== */
.support-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-bottom: 24px;
}

.support-card {
  background: var(--bg-card);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  padding: 28px;
}

.support-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-cta);
  font-size: 0.76rem;
  font-weight: 700;
  margin-bottom: 14px;
  background: rgba(252, 211, 77, 0.15);
  color: var(--secondary-yellow);
  border: 1px solid var(--border-yellow);
}

.support-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary-green);
  margin-bottom: 8px;
}

.support-card p {
  color: #a7f3d0;
  font-size: 0.88rem;
  margin-bottom: 20px;
}

.chip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 10px;
}

.chip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 0, 0, 0.7);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  padding: 8px 12px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--primary-green);
  transition: var(--transition);
}

.chip:hover {
  border-color: var(--secondary-yellow);
  color: var(--secondary-yellow);
  box-shadow: 0 0 10px rgba(252, 211, 77, 0.3);
  transform: translateY(-2px);
}

.chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--secondary-yellow);
  box-shadow: 0 0 6px var(--secondary-yellow);
}

.node-matrix-card {
  background: var(--bg-card);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.node-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.node-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-cta);
  background: rgba(0, 0, 0, 0.8);
  border: 1px solid var(--border-green);
  font-size: 0.82rem;
  color: var(--text-bright);
}

/* ===================================================================
   套餐价格对比表
   =================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-green);
  box-shadow: 0 0 30px rgba(16, 185, 129, 0.4);
}

.pricing-card.featured {
  border: 2px solid var(--secondary-yellow);
  box-shadow: 0 0 25px rgba(252, 211, 77, 0.35);
}

.featured-ribbon {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--secondary-yellow);
  color: #000000;
  padding: 3px 14px;
  border-radius: var(--radius-cta);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  box-shadow: 0 0 10px rgba(252, 211, 77, 0.6);
  white-space: nowrap;
}

.plan-header {
  margin-bottom: 20px;
  text-align: center;
}

.plan-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-green);
  margin-bottom: 6px;
}

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

.plan-price-wrap {
  text-align: center;
  margin-bottom: 22px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-green);
}

.plan-currency {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--secondary-yellow);
  vertical-align: super;
}

.plan-price {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--secondary-yellow);
  text-shadow: var(--glow-yellow);
}

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

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: #cbd5e1;
}

.plan-features li svg {
  flex-shrink: 0;
  color: var(--secondary-yellow);
}

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

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.review-card:hover {
  border-color: var(--primary-green);
  transform: translateY(-3px);
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.25);
}

.review-stars {
  color: var(--secondary-yellow);
  margin-bottom: 12px;
  font-size: 1rem;
  letter-spacing: 2px;
}

.review-quote {
  font-size: 0.88rem;
  line-height: 1.65;
  color: #a7f3d0;
  margin-bottom: 18px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--border-green);
  padding-top: 14px;
}

.author-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-cta);
  background: #04150d;
  border: 1px solid var(--primary-green);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--secondary-yellow);
}

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

.author-role {
  font-size: 0.76rem;
  color: var(--text-muted);
}

/* ===================================================================
   常见问题解答 FAQ
   =================================================================== */
.faq-grid {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item[open] {
  border-color: var(--primary-green);
  background: var(--bg-card-hover);
}

.faq-question {
  padding: 18px 20px;
  font-size: 0.98rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  list-style: none;
  color: var(--primary-green);
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-arrow {
  display: inline-block;
  width: 16px;
  height: 16px;
  color: var(--secondary-yellow);
  transition: transform 0.25s ease;
  flex-shrink: 0;
  margin-left: 10px;
}

.faq-item[open] .faq-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 20px 18px;
  font-size: 0.88rem;
  line-height: 1.7;
  color: #a7f3d0;
  border-top: 1px solid rgba(16, 185, 129, 0.15);
  padding-top: 12px;
}

/* ===================================================================
   底部呼应 CTA Banner
   =================================================================== */
.cta-banner {
  padding: 60px 0;
  border-top: 1px solid var(--border-green);
  border-bottom: 1px solid var(--border-green);
  text-align: center;
  background: rgba(4, 21, 13, 0.7);
}

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

.cta-banner h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-green);
  text-shadow: var(--glow-green);
  margin-bottom: 14px;
}

.cta-banner p {
  color: var(--text-bright);
  font-size: 0.95rem;
  margin-bottom: 26px;
}

/* ===================================================================
   页脚 Footer (严格遵循：只保留四个标题，新页面打开)
   =================================================================== */
.site-footer {
  background-color: #000000;
  border-top: 1px solid var(--border-green);
  padding: 36px 0 30px;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-link-item a {
  color: var(--primary-green);
  font-size: 0.92rem;
  font-weight: 700;
  transition: var(--transition);
  padding: 4px 6px;
  border-bottom: 1px solid transparent;
}

.footer-link-item a:hover {
  color: var(--secondary-yellow);
  border-bottom-color: var(--secondary-yellow);
  text-shadow: var(--glow-yellow);
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ===================================================================
   子页面排版 (关于我们、服务条款、隐私政策、知识科普、网站地图)
   =================================================================== */
.subpage-hero {
  padding: 50px 0 35px;
  border-bottom: 1px solid var(--border-green);
  background: rgba(4, 21, 13, 0.6);
}

.subpage-content {
  padding: 45px 0 70px;
  max-width: 860px;
  margin: 0 auto;
}

.content-block {
  background: var(--bg-card);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  padding: 30px;
  margin-bottom: 24px;
}

.content-block h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--primary-green);
  border-left: 3px solid var(--secondary-yellow);
  padding-left: 10px;
  text-shadow: var(--glow-green);
}

.content-block p {
  color: #a7f3d0;
  line-height: 1.75;
  margin-bottom: 14px;
  font-size: 0.92rem;
}

.content-block ul, .content-block ol {
  color: #a7f3d0;
  line-height: 1.75;
  padding-left: 20px;
  margin-bottom: 14px;
  font-size: 0.92rem;
}

.content-block li {
  margin-bottom: 6px;
}

.sitemap-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 18px;
}

.sitemap-card {
  background: rgba(0, 0, 0, 0.7);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  padding: 18px;
  transition: var(--transition);
}

.sitemap-card:hover {
  border-color: var(--secondary-yellow);
  transform: translateY(-2px);
  box-shadow: 0 0 15px rgba(252, 211, 77, 0.3);
}

.sitemap-card h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
  color: var(--secondary-yellow);
}

.sitemap-card p {
  font-size: 0.84rem;
  color: #a7f3d0;
  margin-bottom: 0;
}

/* 规范语义化网站地图列表 (纯标准 <ul><li><a href> 爬虫友好架构) */
.sitemap-list {
  list-style: none !important;
  padding-left: 0 !important;
  margin: 18px 0 !important;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sitemap-list-item {
  background: rgba(0, 0, 0, 0.65);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  padding: 16px 20px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sitemap-list-item:hover {
  border-color: var(--secondary-yellow);
  box-shadow: 0 0 16px rgba(252, 211, 77, 0.25);
  transform: translateX(4px);
}

.sitemap-link-main {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--secondary-yellow) !important;
  text-decoration: underline !important;
  text-underline-offset: 4px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  line-height: 1.4;
  transition: var(--transition);
}

.sitemap-link-main:hover {
  color: #ffffff !important;
}

.sitemap-link-desc {
  font-size: 0.88rem;
  color: #a7f3d0;
  margin: 0;
  line-height: 1.6;
}

.sitemap-link-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.78rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(16, 185, 129, 0.2);
  padding-top: 8px;
  margin-top: 4px;
}

.sitemap-badge-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  background: rgba(16, 185, 129, 0.15);
  color: var(--primary-green);
  border: 1px solid var(--border-green);
}


/* ===================================================================
   文章专栏与单篇文章排版 (SEO 文章专栏与正文美学)
   =================================================================== */
.articles-index-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.article-card-item {
  background: var(--bg-card);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  padding: 22px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  text-decoration: none;
}

.article-card-item:hover {
  border-color: var(--secondary-yellow);
  transform: translateY(-3px);
  box-shadow: 0 0 18px rgba(252, 211, 77, 0.25);
}

.article-card-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-cta);
  background: rgba(16, 185, 129, 0.15);
  color: var(--secondary-yellow);
  font-size: 0.74rem;
  font-weight: 700;
  margin-bottom: 10px;
  width: fit-content;
  border: 1px solid rgba(252, 211, 77, 0.25);
}

.article-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary-green);
  line-height: 1.45;
  margin-bottom: 10px;
}

.article-card-desc {
  font-size: 0.84rem;
  color: #a7f3d0;
  line-height: 1.6;
  margin-bottom: 14px;
  flex-grow: 1;
}

.article-card-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--border-green);
  padding-top: 10px;
}

/* 单篇文章排版 */
.article-header {
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-green);
}

.article-breadcrumb {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.article-breadcrumb a {
  color: var(--primary-green);
}

.article-breadcrumb a:hover {
  color: var(--secondary-yellow);
}

.article-main-title {
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--primary-green);
  line-height: 1.3;
  margin-bottom: 14px;
  text-shadow: var(--glow-green);
}

.article-meta-bar {
  display: flex;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-body {
  font-size: 0.94rem;
  line-height: 1.85;
  color: #d1fae5;
}

.article-body h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--secondary-yellow);
  margin: 28px 0 14px;
  border-left: 3px solid var(--primary-green);
  padding-left: 10px;
  text-shadow: var(--glow-yellow);
}

.article-body h3 {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--primary-green);
  margin: 20px 0 10px;
}

.article-body p {
  margin-bottom: 16px;
  color: #a7f3d0;
}

.article-body ul, .article-body ol {
  margin-bottom: 18px;
  padding-left: 24px;
  color: #a7f3d0;
}

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

.article-body strong {
  color: var(--secondary-yellow);
}

.article-body a {
  color: var(--secondary-yellow);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-body a:hover {
  color: #ffffff;
}

.article-callout {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  padding: 18px 20px;
  margin: 24px 0;
}

.article-callout h4 {
  color: var(--secondary-yellow);
  font-size: 0.98rem;
  margin-bottom: 8px;
}

.article-callout p {
  margin-bottom: 0;
  font-size: 0.88rem;
}

.article-faq {
  margin: 36px 0 24px;
}

.article-faq-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--secondary-yellow);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-related {
  margin: 36px 0 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-cta);
  padding: 20px 24px;
}

.article-related-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary-green);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-related-list {
  list-style: none !important;
  padding-left: 0 !important;
  margin: 0 !important;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-related-list li {
  margin: 0 !important;
}

.article-related-list a {
  color: #a7f3d0;
  text-decoration: none !important;
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.article-related-list a:hover {
  color: var(--secondary-yellow);
  transform: translateX(4px);
}

@media (max-width: 992px) {
  .articles-index-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .articles-index-grid {
    grid-template-columns: 1fr;
  }
  .article-main-title {
    font-size: 1.65rem;
  }
}

/* ===================================================================
   响应式媒体查询 (@media) - 确保手机端完美单栏与指尖触摸
   =================================================================== */
@media (max-width: 992px) {
  .hero-grid-wrapper {
    grid-template-columns: 1fr;
  }
  .hero-right {
    width: 100%;
    max-width: 400px;
    margin: 0 auto 30px;
  }
  .terminal-window {
    width: 100%;
  }
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  .support-wrapper {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .site-header .nav-links {
    display: none;
  }
  
  .hero-section {
    padding: 40px 0 30px;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .hero-subtitle {
    font-size: 0.95rem;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-actions .btn {
    width: 100%;
    min-height: 48px;
  }

  /* 移动端保证可触控面积至少 44×44 CSS 像素 */
  .btn-sm, .header-actions .btn {
    min-height: 44px;
    min-width: 44px;
    padding: 10px 16px;
  }
  
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  
  .chip-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .sitemap-group {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.85rem;
  }
  .hero-stats {
    grid-template-columns: 1fr;
  }
  .chip-grid {
    grid-template-columns: 1fr;
  }
}