/* ====================================================================
   龙猫云 (longmaoyun.beauty) 样式系统
   设计风格：Dynamic Aurora & Precision Grid (动态极光网格与丰富色彩体系)
   系统字体栈 · 零外部依赖 · 纯CSS硬件加速动效 · 多维色彩层次 · 高度响应式
   ==================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* 基础画布与表面层 */
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.85);

  --text-main: #090d16;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --border-hairline: #e2e8f0;
  --border-active: #cbd5e1;
  --border-focus: #0284c7;

  /* 多维丰富色彩系统 (Enriched Multi-Tone Palette) */
  --color-cyan: #0284c7;
  --color-cyan-glow: rgba(2, 132, 199, 0.15);
  --color-indigo: #6366f1;
  --color-indigo-glow: rgba(99, 102, 241, 0.15);
  --color-emerald: #10b981;
  --color-emerald-glow: rgba(16, 185, 129, 0.15);
  --color-amber: #f59e0b;
  --color-amber-glow: rgba(245, 158, 11, 0.15);
  --color-rose: #f43f5e;
  --color-rose-glow: rgba(244, 63, 94, 0.15);
  --color-purple: #8b5cf6;

  /* 渐变系统 (Dynamic Gradients) */
  --grad-primary: linear-gradient(135deg, #0284c7 0%, #6366f1 100%);
  --grad-accent: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
  --grad-emerald: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --grad-amber: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --grad-rose: linear-gradient(135deg, #f43f5e 0%, #e11d48 100%);
  --grad-dark: linear-gradient(145deg, #0f172a 0%, #090d16 100%);

  /* 几何度量与阴影 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --max-w: 1200px;
  --header-h: 70px;

  --shadow-subtle: 0 1px 3px 0 rgba(15, 23, 42, 0.04);
  --shadow-card: 0 4px 16px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
  --shadow-card-hover: 0 16px 32px -6px rgba(15, 23, 42, 0.09), 0 6px 12px -3px rgba(15, 23, 42, 0.04);
  --shadow-glow: 0 0 25px rgba(2, 132, 199, 0.2);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-page);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: all 0.15s ease;
}

a:hover {
  color: #0369a1;
}

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

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

.section-wrap {
  padding-top: 96px;
  padding-bottom: 96px;
  position: relative;
}

/* 具有色彩纵深感的复合背景网格 */
.section-aurora-bg {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-hairline);
  border-bottom: 1px solid var(--border-hairline);
  position: relative;
  overflow: hidden;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(2, 132, 199, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(99, 102, 241, 0.06) 0%, transparent 40%),
    linear-gradient(to right, rgba(226, 232, 240, 0.45) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(226, 232, 240, 0.45) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
}

/* 标题模块设计 (增加彩色渐变强调与微光徽章) */
.section-header {
  max-width: 740px;
  margin: 0 auto 56px;
  text-align: center;
  position: relative;
}

.section-header .tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-cyan);
  background-color: #f0f9ff;
  border: 1px solid #bae6fd;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
  box-shadow: 0 2px 6px rgba(2, 132, 199, 0.08);
}

.section-header h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.035em;
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-header h2 .highlight-gradient {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.section-header p {
  font-size: 1.075rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* 高感光按钮体系 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  min-height: 44px;
  min-width: 44px;
  white-space: nowrap;
  letter-spacing: -0.01em;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--text-main);
  color: #ffffff;
  border-color: var(--text-main);
  box-shadow: 0 2px 8px rgba(9, 13, 22, 0.15);
}

.btn-primary:hover {
  background: #1e293b;
  border-color: #1e293b;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(9, 13, 22, 0.2);
}

.btn-accent {
  background: var(--grad-primary);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
}

.btn-accent:hover {
  filter: brightness(1.08);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
  color: #ffffff;
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border-color: var(--border-hairline);
  box-shadow: var(--shadow-subtle);
}

.btn-secondary:hover {
  background-color: #f8fafc;
  border-color: var(--border-active);
  color: var(--text-main);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
}

.btn-block {
  width: 100%;
}

/* 顶部导航 Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background-color: rgba(248, 250, 252, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  transition: all 0.2s ease;
}

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

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.03em;
}

.brand-logo svg {
  color: var(--color-cyan);
  filter: drop-shadow(0 2px 6px rgba(2, 132, 199, 0.35));
}

.brand-logo:hover {
  color: var(--color-cyan);
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.775rem;
  font-family: var(--font-mono);
  color: #065f46;
  background-color: #ecfdf5;
  border: 1px solid #a7f3d0;
  padding: 3px 10px;
  border-radius: 20px;
  box-shadow: 0 1px 3px rgba(16, 185, 129, 0.1);
}

.status-dot {
  width: 7px;
  height: 7px;
  background-color: var(--color-emerald);
  border-radius: 50%;
  position: relative;
}

.status-dot::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  border-radius: 50%;
  border: 1px solid var(--color-emerald);
  animation: ping-pulse 2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes ping-pulse {
  0% { transform: scale(1); opacity: 0.8; }
  75%, 100% { transform: scale(2.2); opacity: 0; }
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color 0.15s ease;
  position: relative;
}

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

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 8px;
  color: var(--text-main);
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
}

/* ====================================================================
   首屏 Hero (极光流动背景 + 交互式拓扑仪表盘)
   ==================================================================== */
.hero-section {
  padding-top: 92px;
  padding-bottom: 84px;
  border-bottom: 1px solid var(--border-hairline);
  background: 
    radial-gradient(circle at 10% 20%, rgba(2, 132, 199, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 90% 15%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 50% 85%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
    #f8fafc;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 52px;
  align-items: center;
}

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

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 5px 14px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: 30px;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
}

.hero-pill-badge {
  background: var(--grad-primary);
  color: #ffffff;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.18;
  color: var(--text-main);
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 38px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 44px;
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border-hairline);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.trust-item svg {
  color: var(--color-cyan);
}

/* Hero 右侧拟态技术监控面板 (高光渐变与动态时延光感) */
.hero-monitor-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.08), 0 0 0 1px rgba(255, 255, 255, 0.8) inset;
  position: relative;
  overflow: hidden;
}

.hero-monitor-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad-accent);
}

.monitor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-hairline);
  margin-bottom: 20px;
}

.monitor-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.monitor-title {
  font-size: 0.875rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-main);
  letter-spacing: 0.04em;
}

.monitor-pill {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  background-color: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.monitor-node-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.monitor-node-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  transition: all 0.2s ease;
}

.monitor-node-row:hover {
  background-color: #ffffff;
  border-color: #cbd5e1;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
  transform: translateX(2px);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text-main);
}

.node-flag {
  font-size: 0.775rem;
  font-family: var(--font-mono);
  font-weight: 800;
  padding: 2px 7px;
  background-color: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  color: var(--color-cyan);
}

.node-metrics {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 0.825rem;
}

.metric-ping {
  color: #059669;
  font-weight: 700;
  background-color: #ecfdf5;
  padding: 2px 8px;
  border-radius: 4px;
}

.metric-type {
  color: #6366f1;
  background-color: #eef2ff;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

/* ====================================================================
   特性卡 Features (多彩 Bento 架构与内联视觉微图元)
   ==================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.feature-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-subtle);
}

/* 个性化渐变顶部高光条 */
.feature-card.theme-cyan::before {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--grad-primary);
}
.feature-card.theme-emerald::before {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--grad-emerald);
}
.feature-card.theme-rose::before {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--grad-rose);
}
.feature-card.theme-indigo::before {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--grad-accent);
}

.feature-card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.feature-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 24px;
}

.feature-icon-box {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: transform 0.2s ease;
}

.feature-card:hover .feature-icon-box {
  transform: scale(1.06);
}

.theme-cyan .feature-icon-box { background: #f0f9ff; color: #0284c7; border-color: #bae6fd; }
.theme-emerald .feature-icon-box { background: #ecfdf5; color: #10b981; border-color: #a7f3d0; }
.theme-rose .feature-icon-box { background: #fff1f2; color: #f43f5e; border-color: #fecdd3; }
.theme-indigo .feature-icon-box { background: #eef2ff; color: #6366f1; border-color: #c7d2fe; }

.feature-code-tag {
  font-family: var(--font-mono);
  font-size: 0.775rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 6px;
  background-color: #f1f5f9;
  color: var(--text-muted);
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ====================================================================
   流媒体支持模块 (全彩卡片矩阵与品牌质感)
   ==================================================================== */
.media-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
  margin-top: 36px;
}

.media-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 24px 14px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-subtle);
  position: relative;
  overflow: hidden;
}

.media-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: #cbd5e1;
}

.media-item.brand-netflix:hover { border-color: #ef4444; }
.media-item.brand-disney:hover { border-color: #3b82f6; }
.media-item.brand-youtube:hover { border-color: #dc2626; }
.media-item.brand-prime:hover { border-color: #0284c7; }
.media-item.brand-spotify:hover { border-color: #10b981; }
.media-item.brand-apple:hover { border-color: #475569; }

.media-icon-symbol {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.95rem;
}

.brand-netflix .media-icon-symbol { background: #fef2f2; color: #ef4444; }
.brand-disney .media-icon-symbol { background: #eff6ff; color: #2563eb; }
.brand-youtube .media-icon-symbol { background: #fef2f2; color: #dc2626; }
.brand-prime .media-icon-symbol { background: #f0f9ff; color: #0284c7; }
.brand-spotify .media-icon-symbol { background: #ecfdf5; color: #10b981; }
.brand-apple .media-icon-symbol { background: #f8fafc; color: #334155; }

.media-name {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.media-badge {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  background-color: #f1f5f9;
  color: var(--text-secondary);
}

/* ====================================================================
   AI 工具支持 (彩色光晕与芯片微卡片)
   ==================================================================== */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-top: 36px;
}

.ai-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: all 0.22s ease;
  box-shadow: var(--shadow-subtle);
  position: relative;
}

.ai-card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.ai-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.ai-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ai-icon-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.ai-card-gpt .ai-icon-dot { background-color: #10b981; box-shadow: 0 0 8px rgba(16, 185, 129, 0.5); }
.ai-card-claude .ai-icon-dot { background-color: #d97706; box-shadow: 0 0 8px rgba(217, 119, 6, 0.5); }
.ai-card-cursor .ai-icon-dot { background-color: #6366f1; box-shadow: 0 0 8px rgba(99, 102, 241, 0.5); }

.ai-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.ai-badge {
  font-size: 0.775rem;
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 6px;
  background-color: #f1f5f9;
  color: var(--text-muted);
}

.ai-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ====================================================================
   定价方案 Pricing (高饱满层次与推荐档光感边框)
   ==================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 44px 34px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-subtle);
}

.pricing-card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.pricing-card.recommended {
  border-color: #3b82f6;
  box-shadow: 0 0 0 2px #3b82f6, 0 20px 40px -10px rgba(59, 130, 246, 0.15);
  background: linear-gradient(180deg, #ffffff 0%, #f0f7ff 100%);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 34px;
  background: var(--grad-primary);
  color: #ffffff;
  font-size: 0.775rem;
  font-family: var(--font-mono);
  font-weight: 800;
  padding: 3px 14px;
  border-radius: 20px;
  letter-spacing: 0.06em;
  box-shadow: 0 4px 10px rgba(2, 132, 199, 0.35);
}

.pricing-header {
  margin-bottom: 28px;
}

.pricing-tier-name {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.pricing-tier-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  min-height: 44px;
  line-height: 1.55;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 20px 0 12px;
}

.pricing-currency {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
}

.pricing-amount {
  font-size: 2.85rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.04em;
  font-family: var(--font-mono);
}

.pricing-period {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
}

.pricing-divider {
  height: 1px;
  background-color: var(--border-hairline);
  margin: 20px 0;
}

.pricing-features-list {
  list-style: none;
  margin-bottom: 38px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 15px;
}

.pricing-feature-item svg {
  color: var(--color-cyan);
  flex-shrink: 0;
}

.recommended .pricing-feature-item svg {
  color: #3b82f6;
}

/* ====================================================================
   使用场景卡 Usage Scenarios (带状态徽章与多设备标识)
   ==================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.scenario-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-subtle);
  position: relative;
}

.scenario-card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.scenario-device-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: #0369a1;
  background-color: #f0f9ff;
  border: 1px solid #bae6fd;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 18px;
  width: fit-content;
}

.scenario-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.scenario-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ====================================================================
   常见问题 FAQ
   ==================================================================== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  background-color: var(--bg-surface);
  overflow: hidden;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-subtle);
}

.faq-item:hover {
  border-color: #cbd5e1;
}

.faq-question {
  padding: 22px 26px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

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

.faq-icon-box {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #f1f5f9;
  border-radius: 50%;
  color: var(--text-secondary);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

details[open] .faq-icon-box {
  transform: rotate(45deg);
  background: var(--grad-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.3);
}

.faq-answer {
  padding: 0 26px 24px 26px;
  font-size: 0.975rem;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px solid #f1f5f9;
  padding-top: 18px;
}

/* ====================================================================
   Final CTA (深邃极光星空与高能聚焦)
   ==================================================================== */
.final-cta-section {
  padding: 104px 0;
  background: 
    radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.25) 0%, transparent 55%),
    radial-gradient(circle at 80% 70%, rgba(2, 132, 199, 0.25) 0%, transparent 55%),
    radial-gradient(circle at 50% 10%, rgba(16, 185, 129, 0.15) 0%, transparent 50%),
    #090d16;
  color: #ffffff;
  text-align: center;
  position: relative;
  overflow: hidden;
  border-top: 1px solid #1e293b;
}

.final-cta-box {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.final-cta-tag {
  display: inline-flex;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: #38bdf8;
  padding: 5px 16px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: 30px;
  margin-bottom: 22px;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
}

.final-cta-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 18px;
}

.final-cta-desc {
  font-size: 1.125rem;
  color: #94a3b8;
  margin-bottom: 40px;
  line-height: 1.7;
}

.final-cta-section .btn-accent {
  padding: 15px 36px;
  font-size: 1.075rem;
  box-shadow: 0 0 25px rgba(56, 189, 248, 0.4);
}

/* ====================================================================
   页脚 Footer
   ==================================================================== */
.site-footer {
  margin-top: auto;
  background-color: #05070c;
  color: #64748b;
  padding: 60px 0 38px;
  font-size: 0.875rem;
  border-top: 1px solid #1e293b;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 38px;
  align-items: center;
}

.footer-link {
  color: #94a3b8;
  font-weight: 600;
}

.footer-link:hover {
  color: #ffffff;
}

.footer-divider {
  height: 1px;
  background-color: #1e293b;
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-affiliate-note {
  color: #64748b;
  font-size: 0.825rem;
  line-height: 1.6;
}

.footer-copyright {
  color: #475569;
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

/* 移动端吸底 CTA */
.mobile-sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-hairline);
  padding: 10px 20px;
  z-index: 99;
  display: none;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
  transition: transform 0.25s ease;
}

.mobile-sticky-info {
  display: flex;
  flex-direction: column;
}

.mobile-sticky-title {
  font-size: 0.925rem;
  font-weight: 800;
  color: var(--text-main);
}

.mobile-sticky-sub {
  font-size: 0.75rem;
  color: var(--color-cyan);
  font-family: var(--font-mono);
}

/* 面包屑与通用内容页 */
.breadcrumb-nav {
  padding: 22px 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

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

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

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

.page-header {
  padding: 38px 0 30px;
  border-bottom: 1px solid var(--border-hairline);
  margin-bottom: 48px;
}

.page-title {
  font-size: 2.45rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
  letter-spacing: -0.035em;
  line-height: 1.25;
}

.page-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.875rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* 指南卡片 Grid */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  margin-bottom: 60px;
}

.guide-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  padding: 34px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.22s ease;
  box-shadow: var(--shadow-subtle);
}

.guide-card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.guide-card-tag {
  display: inline-block;
  font-size: 0.775rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-cyan);
  background-color: #f0f9ff;
  border: 1px solid #bae6fd;
  padding: 2px 10px;
  border-radius: 4px;
  margin-bottom: 14px;
}

.guide-card-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.guide-card-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 26px;
}

.guide-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  border-top: 1px solid #f1f5f9;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.guide-card-footer a {
  font-weight: 700;
}

/* 文章详情页正文规范 */
.article-container {
  max-width: 860px;
  margin: 0 auto;
  padding-bottom: 88px;
}

.article-body {
  font-size: 1.075rem;
  line-height: 1.85;
  color: #1e293b;
}

.article-body p {
  margin-bottom: 24px;
}

.article-body h2 {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text-main);
  margin-top: 52px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-hairline);
  letter-spacing: -0.02em;
}

.article-body h3 {
  font-size: 1.325rem;
  font-weight: 800;
  color: var(--text-main);
  margin-top: 36px;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

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

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

.article-lead {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-secondary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-left: 5px solid var(--color-cyan);
  padding: 22px 26px;
  border-radius: var(--radius-sm);
  margin-bottom: 34px;
  box-shadow: var(--shadow-subtle);
}

.article-cta-box {
  margin: 60px 0;
  padding: 40px;
  background-color: var(--bg-surface);
  border: 1px solid #bae6fd;
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: 0 10px 30px rgba(2, 132, 199, 0.08);
}

.article-cta-box h3, .article-cta-box h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-top: 0;
  margin-bottom: 12px;
  color: var(--text-main);
}

.article-cta-box p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 26px;
}

.article-related-links {
  margin-top: 52px;
  padding: 30px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
}

.article-related-links h3 {
  font-size: 1.2rem;
  margin-top: 0;
  margin-bottom: 18px;
}

.related-list {
  list-style: none;
  padding-left: 0;
}

.related-list li {
  margin-bottom: 10px;
}

/* 法律与合规页 */
.legal-content {
  max-width: 860px;
  margin: 0 auto;
  padding-bottom: 88px;
  font-size: 1rem;
  line-height: 1.85;
  color: #334155;
}

.legal-content h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  margin-top: 44px;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.legal-content p {
  margin-bottom: 22px;
}

.legal-content ul {
  margin-bottom: 24px;
  padding-left: 20px;
}

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

/* 网站地图列表 */
.sitemap-section {
  margin-bottom: 44px;
}

.sitemap-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 12px;
}

.sitemap-links-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px 32px;
}

/* 响应式断点适配 */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }
  .hero-monitor-card {
    max-width: 580px;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
  }
  .media-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
  .guides-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .section-wrap {
    padding-top: 60px;
    padding-bottom: 60px;
  }
  .hero-title {
    font-size: 2.15rem;
  }
  .hero-subtitle {
    font-size: 1.05rem;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .ai-grid {
    grid-template-columns: 1fr;
  }
  .media-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .brand-wrap .status-indicator {
    display: none;
  }
  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    width: 100%;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-hairline);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 18px;
    box-shadow: var(--shadow-card-hover);
  }
  .nav-menu.is-open {
    display: flex;
  }
  .mobile-sticky-cta {
    display: flex;
  }
  body {
    padding-bottom: 64px;
  }
  .sitemap-links-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}