/* ==========================================================================
   MESL机场专线官网 - 原生硬核科技感 CSS 样式表 (style.css)
   - 风格：未来赛博/前沿云计算全息科技风 (Futuristic Cyber-Tech HUD Style)
   - 排版重构：全新双栏非对称科技分流布局 (Asymmetric Split Hero + Bento Grid + 2-Col FAQ)
   - 主色调：深曜碳晶基底 (#07090e) + 赛博矩阵微网格 + 极光紫 (#8b5cf6) + 全息青蓝 (#06b6d4) + 活跃翡翠绿 (#10b981)
   - 零依赖、纯原生、秒开级极速响应
   - 响应式自适应适配 (360px, 390px, 768px, 1024px, 1440px)
   - 严格遵循 WCAG 2.1 AA 对比度与无障碍规范 (7:1+)
   - 触控区域 >= 44x44px, 锚点偏移 scroll-margin-top
   ========================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  /* 科技深曜背景层系 */
  --bg-primary: #07090e;
  --bg-secondary: #0c0f17;
  --bg-card: #111522;
  --bg-card-hover: #161c2d;
  --bg-accent: rgba(139, 92, 246, 0.12);
  
  /* 赛博全息发光边框 */
  --border-color: rgba(255, 255, 255, 0.09);
  --border-hover: rgba(139, 92, 246, 0.6);
  --border-cyan: rgba(6, 182, 212, 0.5);
  
  /* 字体颜色系统 */
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  /* 核心科技光谱 */
  --color-primary: #8b5cf6;       /* 极光量子紫 */
  --color-primary-hover: #7c3aed;
  --color-cyan: #06b6d4;          /* 全息极客青 */
  --color-accent: #06b6d4;
  --color-success: #10b981;       /* 活跃在线绿 */
  --color-warning: #f59e0b;       /* 算力告警橙 */
  --color-gold: #fbbf24;
  
  --max-width: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  
  /* 科技全息投影与光晕 */
  --shadow-card: 0 8px 24px -4px rgba(0, 0, 0, 0.6), 0 2px 6px -1px rgba(139, 92, 246, 0.08);
  --shadow-hover: 0 16px 36px -4px rgba(139, 92, 246, 0.28), 0 0 20px rgba(6, 182, 212, 0.2);
  --glow-primary: 0 0 24px rgba(139, 92, 246, 0.35);
  --nav-height: 72px;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-text-size-adjust: 100%;
}

/* 科技感背景网格矩阵 */
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--bg-primary);
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* 键盘无障碍跳链 */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-primary);
  color: #ffffff;
  padding: 0.75rem 1.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  border-radius: var(--radius-sm);
  z-index: 9999;
  text-decoration: none;
  transition: top 0.2s ease;
  box-shadow: var(--glow-primary);
}
.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--color-cyan);
}

/* 焦点高亮 */
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
  outline: 3px solid var(--color-cyan);
  outline-offset: 3px;
}

/* 锚点防遮挡 */
section[id], article[id], div[id] {
  scroll-margin-top: calc(var(--nav-height) + 20px);
}

/* 通用容器 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* 顶部全息导航栏 (Header / Nav) */
.site-header {
  position: sticky;
  top: 0;
  height: var(--nav-height);
  background-color: rgba(7, 9, 14, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 32px;
  height: 32px;
  color: var(--color-cyan);
  fill: currentColor;
  filter: drop-shadow(0 0 8px rgba(6, 182, 212, 0.6));
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.5rem 0.25rem;
  transition: color 0.2s ease, text-shadow 0.2s ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--color-cyan);
  text-shadow: 0 0 10px rgba(6, 182, 212, 0.5);
}

/* 科技感按钮规范 (CTA >= 44x44px) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  min-width: 44px;
  padding: 0.65rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 700;
  font-family: var(--font-mono);
  text-decoration: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: linear-gradient(135deg, #7c3aed 0%, #4f46e5 100%);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(124, 58, 237, 0.45);
  border: 1px solid rgba(167, 139, 250, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.65);
}

.btn-accent {
  background: linear-gradient(135deg, #0284c7 0%, #06b6d4 100%);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(6, 182, 212, 0.45);
  border: 1px solid rgba(103, 232, 249, 0.4);
}

.btn-accent:hover {
  background: linear-gradient(135deg, #0ea5e9 0%, #22d3ee 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.65);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  border-color: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  border-color: var(--color-cyan);
  background-color: rgba(6, 182, 212, 0.12);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.25);
}

.btn-lg {
  padding: 0.85rem 2rem;
  font-size: 1.05rem;
}

/* 科技脉冲指示灯 (Pulse Beacon) */
.pulse-beacon {
  width: 8px;
  height: 8px;
  background-color: var(--color-success);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 10px var(--color-success);
  animation: pulse-glow 2s infinite ease-in-out;
  flex-shrink: 0;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 1; transform: scale(1); box-shadow: 0 0 12px var(--color-success); }
  50% { opacity: 0.4; transform: scale(0.85); box-shadow: 0 0 4px var(--color-success); }
}

/* ==========================================================================
   全新非对称双栏科技主视觉排版 (Asymmetric Split Hero Layout)
   ========================================================================== */
.hero-section {
  padding: 4.5rem 0 3.5rem;
  position: relative;
  background: 
    radial-gradient(circle at 30% 30%, rgba(139, 92, 246, 0.15) 0%, transparent 60%),
    radial-gradient(circle at 85% 60%, rgba(6, 182, 212, 0.12) 0%, transparent 50%);
  border-bottom: 1px solid var(--border-color);
}

.hero-split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
  margin-bottom: 3.5rem;
}

.hero-content-col {
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.35);
  color: #c4b5fd;
  padding: 0.4rem 1.1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
  font-family: var(--font-mono);
  margin-bottom: 1.5rem;
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.15);
}

.hero-title {
  font-size: 3.1rem;
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff 30%, #a78bfa 70%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 35px rgba(139, 92, 246, 0.25);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-cyan);
  font-weight: 700;
  font-family: var(--font-mono);
  margin-bottom: 1.25rem;
  letter-spacing: 0.02em;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  justify-content: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.75rem;
}

.hero-pills-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
}

.hero-pill {
  padding: 0.25rem 0.65rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 4px;
}

/* 核心节点动态遥测监视器 (Cyber Node Monitor Widget) */
.hero-monitor-col {
  width: 100%;
}

.cyber-terminal {
  background: rgba(13, 17, 28, 0.95);
  border: 1px solid rgba(139, 92, 246, 0.4);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 40px -8px rgba(0, 0, 0, 0.8), 0 0 24px rgba(139, 92, 246, 0.25);
  overflow: hidden;
  backdrop-filter: blur(16px);
}

.terminal-header {
  background: rgba(20, 26, 44, 0.9);
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

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

.term-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.term-dot-red    { background: #ef4444; }
.term-dot-yellow { background: #f59e0b; }
.term-dot-green  { background: #10b981; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-cyan);
  letter-spacing: 0.05em;
}

.terminal-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.node-row {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  transition: all 0.2s;
}

.node-row:hover {
  background: rgba(6, 182, 212, 0.08);
  border-color: rgba(6, 182, 212, 0.3);
  transform: translateX(4px);
}

.node-meta {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text-main);
  font-weight: 600;
}

.node-stats {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.node-ping {
  color: var(--color-success);
  font-weight: 700;
}

.node-loss {
  color: var(--text-dim);
}

.terminal-footer {
  padding: 0.75rem 1.25rem;
  background: rgba(9, 12, 20, 0.9);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* 全宽科技遥测仪表横幅 */
.hero-trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  width: 100%;
  padding: 1.5rem 2rem;
  background: rgba(17, 21, 34, 0.75);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.trust-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -0.75rem;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-color);
}

.trust-num {
  font-size: 1.85rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #ffffff;
  background: linear-gradient(135deg, #ffffff 0%, var(--color-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.trust-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
  font-weight: 600;
}

/* ==========================================================================
   核心优势版块：现代 Bento Grid (便当盒科技架构排版)
   ========================================================================== */
.section-padding {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  color: var(--color-cyan);
  font-size: 0.85rem;
  font-weight: 800;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  display: inline-block;
  margin-bottom: 0.65rem;
  padding: 0.2rem 0.6rem;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: 4px;
}

.section-title {
  font-size: 2.15rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.65;
}

/* Bento Grid 核心优势排版 */
.features-bento-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.feature-bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  box-shadow: var(--shadow-card);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.feature-bento-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-cyan));
  opacity: 0.7;
}

.feature-bento-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}

.feature-bento-card:hover::before {
  opacity: 1;
  box-shadow: 0 0 12px var(--color-cyan);
}

/* 顶部通栏重点卡片 */
.feature-bento-wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
}

.feature-icon-box {
  width: 58px;
  height: 58px;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-cyan);
  margin-bottom: 1.25rem;
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.2);
}

.feature-icon-box svg {
  width: 30px;
  height: 30px;
  fill: currentColor;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.85rem;
}

.feature-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  flex-grow: 1;
}

.card-specs {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #38bdf8;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* 专线拓扑对比图卡 (Bento 嵌入式图解) */
.tunnel-visual-box {
  background: rgba(7, 9, 14, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  font-family: var(--font-mono);
}

.tunnel-flow-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tunnel-flow-title {
  font-size: 0.8rem;
  font-weight: 700;
}
.title-bad  { color: #f87171; }
.title-good { color: #34d399; }

.tunnel-nodes-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
}

.node-chip {
  padding: 0.35rem 0.65rem;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  white-space: nowrap;
}

.node-line-bad {
  flex-grow: 1;
  height: 2px;
  background: repeating-linear-gradient(90deg, #ef4444 0, #ef4444 4px, transparent 4px, transparent 8px);
}

.node-line-good {
  flex-grow: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-cyan));
  box-shadow: 0 0 8px var(--color-cyan);
}

/* ==========================================================================
   流媒体与 AI 算力矩阵版块 (Compute Matrix)
   ========================================================================== */
.unlock-wrapper {
  background: linear-gradient(135deg, rgba(17, 21, 34, 0.9) 0%, rgba(12, 15, 23, 0.95) 100%);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
}

.unlock-wrapper::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 20%;
  right: 20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-cyan), transparent);
}

.unlock-content h3 {
  font-size: 1.75rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 1rem;
}

.unlock-content p {
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 1.75rem;
}

.unlock-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.75rem;
}

.badge-tag {
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #34d399;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  font-family: var(--font-mono);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.unlock-grid-visual {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.service-card {
  background: rgba(7, 9, 14, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all 0.2s;
}

.service-card:hover {
  border-color: var(--border-cyan);
  background: rgba(6, 182, 212, 0.06);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.15);
}

.service-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  font-weight: 800;
  color: #ffffff;
  flex-shrink: 0;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.icon-netflix { background: #E50914; }
.icon-youtube { background: #FF0000; }
.icon-openai  { background: #10A37F; }
.icon-claude  { background: #D97706; }

.service-meta h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
}

.service-meta span {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: block;
  margin-top: 0.2rem;
}

/* ==========================================================================
   价格对比表 (Cloud Spec Matrix)
   ========================================================================== */
.pricing-table-container {
  overflow-x: auto;
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
  margin-bottom: 2rem;
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 680px;
}

.pricing-table caption {
  caption-side: top;
  text-align: left;
  padding: 1.1rem 1.5rem;
  font-weight: 700;
  font-size: 0.9rem;
  font-family: var(--font-mono);
  color: var(--color-cyan);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.pricing-table th, .pricing-table td {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.pricing-table th {
  background: rgba(12, 15, 23, 0.9);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.95rem;
  font-family: var(--font-mono);
}

.pricing-table tbody tr:hover {
  background: var(--bg-card-hover);
}

.plan-name {
  font-weight: 800;
  font-size: 1.15rem;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.plan-badge {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, var(--color-primary), #6366f1);
  color: #ffffff;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

.plan-price {
  font-size: 1.5rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--color-cyan);
}

.plan-price small {
  font-size: 0.85rem;
  font-weight: normal;
  color: var(--text-muted);
}

/* ==========================================================================
   用户评价版块 (Verified Reviews)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, border-color 0.2s;
  position: relative;
}

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

.review-stars {
  color: var(--color-gold);
  font-size: 1.1rem;
  margin-bottom: 0.85rem;
  letter-spacing: 3px;
  text-shadow: 0 0 8px rgba(251, 191, 36, 0.4);
}

.review-body {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  flex-grow: 1;
  margin-bottom: 1.25rem;
}

.reviewer-info {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
}

.reviewer-avatar {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-cyan));
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.4);
}

.reviewer-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: #ffffff;
}

.reviewer-role {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ==========================================================================
   常见问题解答：全新双栏非对称科技排版 (Asymmetric Split FAQ Layout)
   ========================================================================== */
.faq-split-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.35fr;
  gap: 3.5rem;
  align-items: start;
}

.faq-side-col {
  position: sticky;
  top: 100px;
}

.faq-side-box {
  background: var(--bg-card);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-md);
  padding: 2rem;
  margin-top: 2rem;
  box-shadow: var(--shadow-card);
}

.faq-side-box h4 {
  font-size: 1.1rem;
  color: #ffffff;
  margin-bottom: 0.75rem;
}

.faq-side-box p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.faq-main-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.faq-item[open] {
  border-color: rgba(6, 182, 212, 0.5);
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.12);
}

.faq-question {
  padding: 1.25rem 1.65rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
}

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

.faq-question::after {
  content: "▾";
  font-size: 1.3rem;
  color: var(--color-cyan);
  transition: transform 0.25s;
}

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

.faq-answer {
  padding: 0 1.65rem 1.35rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
  padding-top: 1.1rem;
}

.faq-answer a {
  color: var(--color-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}

.faq-answer a:hover {
  color: #38bdf8;
  text-shadow: 0 0 8px rgba(56, 189, 248, 0.4);
}

/* ==========================================================================
   页脚与子页面通用排版
   ========================================================================== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3.5rem 0 2rem;
  margin-top: auto;
}

.footer-nav-list {
  display: flex;
  justify-content: center;
  align-items: center;
  list-style: none;
  gap: 2.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.footer-nav-list a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: color 0.2s, text-shadow 0.2s;
}

.footer-nav-list a:hover {
  color: var(--color-cyan);
  text-shadow: 0 0 10px rgba(6, 182, 212, 0.5);
}

.footer-bottom {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  line-height: 1.6;
}

/* 文章详情页与子页面样式 */
.page-header {
  padding: 3.5rem 0 2rem;
  text-align: center;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 3rem;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  margin-bottom: 1rem;
}

.breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
}

.breadcrumbs a:hover {
  color: var(--color-cyan);
}

.article-container {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-body h2 {
  font-size: 1.65rem;
  color: #ffffff;
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.article-body h3 {
  font-size: 1.3rem;
  color: #ffffff;
  margin: 1.8rem 0 0.8rem;
}

.article-body p {
  margin-bottom: 1.4rem;
}

.article-body ul, .article-body ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-body a {
  color: var(--color-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}

.article-body a:hover {
  color: #38bdf8;
}

.article-callout {
  background: rgba(139, 92, 246, 0.1);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  color: #ffffff;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
  position: relative;
}

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

.article-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.article-card-title a {
  color: #ffffff;
  text-decoration: none;
}

.article-card-title a:hover {
  color: var(--color-cyan);
}

.article-card-meta {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--color-cyan);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.article-card-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  flex-grow: 1;
  margin-bottom: 1.25rem;
}

/* ==========================================================================
   全响应式多断点适配 (@media: 1024px, 768px, 390px)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-split {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-content-col {
    text-align: center;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-pills-row {
    justify-content: center;
  }
  .features-bento-grid {
    grid-template-columns: 1fr;
  }
  .feature-bento-wide {
    grid-template-columns: 1fr;
  }
  .reviews-grid, .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .unlock-wrapper {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .faq-split-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .faq-side-col {
    position: static;
    text-align: center;
  }
  .faq-side-box {
    margin-top: 1.5rem;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .hero-trust-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    padding: 1.25rem;
  }
  .trust-item:not(:last-child)::after {
    display: none;
  }
  .reviews-grid, .article-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
  .unlock-grid-visual {
    grid-template-columns: 1fr;
  }
  .footer-nav-list {
    flex-direction: column;
    gap: 1rem;
  }
  .section-padding {
    padding: 3.5rem 0;
  }
}

@media (max-width: 390px) {
  .hero-title {
    font-size: 1.85rem;
  }
  .hero-desc {
    font-size: 0.95rem;
  }
  .btn-lg {
    width: 100%;
  }
  .trust-num {
    font-size: 1.4rem;
  }
}

/* 动效友好性 (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;
  }
}