/* ====================================================================
   Now加速专线机场 - 全面 UI 视觉设计规范 (动漫次元 × 星穹魔导网络)
   Aesthetic: Celestial Anime & Cyber-Astral Tech
   Zero CDN, Pure CSS & SVG, High Conversion, Accessible
   ==================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  
  /* 动漫星穹配色体系 */
  --color-bg-base: #f8fafc;
  --color-bg-gradient: linear-gradient(180deg, #f0f5ff 0%, #fdf4ff 35%, #f1f7fe 70%, #f8fafc 100%);
  --color-surface: rgba(255, 255, 255, 0.88);
  --color-surface-hover: rgba(255, 255, 255, 0.98);
  --color-surface-subtle: #f1f5f9;
  --color-surface-glass: rgba(255, 255, 255, 0.72);
  
  /* 文本色彩 */
  --color-text-primary: #0f172a;
  --color-text-secondary: #334155;
  --color-text-muted: #64748b;
  
  /* 动漫魔法强调色 */
  --color-accent-blue: #2563eb;
  --color-accent-purple: #7c3aed;
  --color-accent-pink: #ec4899;
  --color-accent-cyan: #06b6d4;
  --color-accent-gold: #f59e0b;
  --color-accent-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #ec4899 100%);
  --color-accent-gradient-hover: linear-gradient(135deg, #1d4ed8 0%, #6d28d9 50%, #db2777 100%);
  
  /* 边框与光影 */
  --color-border: #e2e8f0;
  --color-border-glow: rgba(124, 58, 237, 0.25);
  --color-border-hover: #cbd5e1;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 8px 24px -4px rgba(37, 99, 235, 0.08), 0 4px 12px -2px rgba(124, 58, 237, 0.04);
  --shadow-lg: 0 16px 36px -6px rgba(37, 99, 235, 0.14), 0 8px 20px -4px rgba(124, 58, 237, 0.08);
  --shadow-anime-glow: 0 0 24px rgba(124, 58, 237, 0.35);
  
  --max-width: 1140px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition-smooth: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --min-touch-size: 44px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-base);
  background-image: var(--color-bg-gradient);
  background-attachment: fixed;
  color: var(--color-text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

/* 动漫全屏飘落粒子 Canvas */
#animeCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.75;
}

a {
  color: var(--color-accent-blue);
  text-decoration: none;
  transition: color var(--transition-smooth);
}

a:hover {
  color: var(--color-accent-purple);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-accent-purple);
  outline-offset: 3px;
}

/* ====================================================================
   顶部吸顶导航（动漫轻幻毛玻璃）
   ==================================================================== */
.site-header {
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: all var(--transition-smooth);
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.brand-badge {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-accent-purple);
  background: rgba(124, 58, 237, 0.1);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(124, 58, 237, 0.2);
  margin-left: 0.25rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  min-height: var(--min-touch-size);
  padding: 0 0.5rem;
  position: relative;
  transition: color var(--transition-smooth);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 6px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-accent-gradient);
  border-radius: 2px;
  transition: all var(--transition-smooth);
  transform: translateX(-50%);
}

.nav-link:hover {
  color: var(--color-accent-purple);
}

.nav-link:hover::after {
  width: 70%;
}

.menu-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  cursor: pointer;
  min-width: var(--min-touch-size);
  min-height: var(--min-touch-size);
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  transition: all var(--transition-smooth);
}

.menu-toggle:hover {
  border-color: var(--color-accent-purple);
  color: var(--color-accent-purple);
}

.menu-toggle svg {
  width: 22px;
  height: 22px;
}

/* ====================================================================
   CTA 按钮系统 (动漫高转化光辉与流光粒子效果)
   ==================================================================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--color-accent-gradient);
  color: #ffffff !important;
  font-weight: 700;
  font-size: 0.975rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  border: none;
  box-shadow: 0 4px 18px rgba(124, 58, 237, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.3) inset;
  transition: all var(--transition-smooth);
  text-decoration: none;
  cursor: pointer;
  min-height: var(--min-touch-size);
  position: relative;
  overflow: hidden;
  z-index: 2;
}

/* 流光掠影扫光动画 */
.btn-primary::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -75%;
  width: 50%;
  height: 200%;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.45) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: rotate(25deg);
  transition: none;
  animation: animeShimmer 4s infinite ease-in-out;
  pointer-events: none;
}

@keyframes animeShimmer {
  0% { transform: translateX(0) rotate(25deg); }
  35%, 100% { transform: translateX(450%) rotate(25deg); }
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 26px rgba(124, 58, 237, 0.5), 0 0 12px rgba(236, 72, 153, 0.4);
}

.btn-primary:active {
  transform: translateY(1px) scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  color: var(--color-text-primary) !important;
  font-weight: 700;
  font-size: 0.975rem;
  padding: 0.75rem 1.65rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(124, 58, 237, 0.25);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-smooth);
  text-decoration: none;
  cursor: pointer;
  min-height: var(--min-touch-size);
}

.btn-secondary:hover {
  background: #ffffff;
  border-color: var(--color-accent-purple);
  color: var(--color-accent-purple) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.12);
}

/* ====================================================================
   Hero 区块 (次元星环与魔导拓扑核心)
   ==================================================================== */
.hero-section {
  padding: 5rem 1.25rem 4rem;
  position: relative;
  z-index: 2;
  overflow: hidden;
}

.hero-inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  position: relative;
}

/* 动漫次元徽章 */
.hero-badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.95rem;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(124, 58, 237, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 700;
  color: var(--color-accent-purple);
  box-shadow: 0 2px 10px rgba(124, 58, 237, 0.12);
  margin-bottom: 1.5rem;
  animation: floatSubtle 4s ease-in-out infinite;
}

@keyframes floatSubtle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.hero-title {
  font-size: 2.85rem;
  line-height: 1.22;
  font-weight: 900;
  color: var(--color-text-primary);
  margin-bottom: 1.35rem;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #0f172a 30%, #3b82f6 70%, #8b5cf6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  line-height: 1.68;
  color: var(--color-text-secondary);
  margin-bottom: 2.25rem;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.15rem;
  margin-bottom: 2.75rem;
  flex-wrap: wrap;
}

/* 动漫魔导星环与数据流视觉容器 */
.hero-graphic-wrap {
  position: relative;
  max-width: 580px;
  margin: 0 auto 2.5rem;
  filter: drop-shadow(0 12px 30px rgba(124, 58, 237, 0.15));
}

.hero-graphic-wrap svg {
  width: 100%;
  height: auto;
  display: block;
}

/* 魔法阵与光环旋转动画 */
.magic-ring-outer {
  transform-origin: 270px 100px;
  animation: ringRotateClockwise 28s linear infinite;
}

.magic-ring-inner {
  transform-origin: 270px 100px;
  animation: ringRotateCounter 18s linear infinite;
}

.magic-pulse-node {
  animation: pulseGlow 3s ease-in-out infinite;
}

@keyframes ringRotateClockwise {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes ringRotateCounter {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); }
}

/* 首屏信任信息 */
.hero-trust {
  border-top: 1px solid rgba(226, 232, 240, 0.8);
  padding-top: 1.85rem;
}

.hero-trust-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: 0.85rem;
  letter-spacing: 0.04em;
}

.hero-trust-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.trust-item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  background: rgba(255, 255, 255, 0.6);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(226, 232, 240, 0.6);
}

.trust-item svg {
  width: 16px;
  height: 16px;
  color: var(--color-accent-blue);
}

/* ====================================================================
   通用区块与网格排版 (动漫视差与立现卡片)
   ==================================================================== */
.content-section {
  padding: 5rem 0;
  position: relative;
  z-index: 2;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section-header {
  margin-bottom: 3.25rem;
  text-align: center;
  position: relative;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-purple);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.15rem;
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 660px;
  margin: 0 auto;
}

/* ====================================================================
   特性网格 (Anime HUD 特效卡片 + 3D 悬浮微倾斜)
   ==================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.85rem;
}

.feature-card {
  background: var(--color-surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(226, 232, 240, 0.85);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

/* 动漫赛博角落光标装饰 */
.feature-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 48px;
  height: 48px;
  background: radial-gradient(circle at top right, rgba(124, 58, 237, 0.15), transparent 70%);
  pointer-events: none;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(124, 58, 237, 0.4);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(124, 58, 237, 0.12);
}

.feature-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(124, 58, 237, 0.18));
  color: var(--color-accent-purple);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  border: 1px solid rgba(124, 58, 237, 0.2);
  transition: transform var(--transition-smooth);
}

.feature-card:hover .feature-icon-wrap {
  transform: scale(1.1) rotate(4deg);
}

.feature-icon-wrap svg {
  width: 26px;
  height: 26px;
}

.feature-title {
  font-size: 1.28rem;
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: 0.65rem;
}

.feature-text {
  font-size: 0.975rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ====================================================================
   流媒体与 AI 支持 (水晶幻彩卡片)
   ==================================================================== */
.support-split {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.85rem;
}

.support-card {
  background: var(--color-surface);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(226, 232, 240, 0.85);
  border-radius: var(--radius-md);
  padding: 2.35rem;
  box-shadow: var(--shadow-md);
  position: relative;
  transition: all var(--transition-smooth);
}

.support-card:hover {
  border-color: rgba(6, 182, 212, 0.4);
  box-shadow: var(--shadow-lg), 0 0 24px rgba(6, 182, 212, 0.12);
}

.support-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  color: var(--color-text-primary);
}

.support-desc {
  font-size: 0.975rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.support-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.support-pill {
  font-size: 0.875rem;
  background: rgba(241, 245, 249, 0.8);
  border: 1px solid var(--color-border);
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-full);
  color: var(--color-text-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: all var(--transition-smooth);
}

.support-pill:hover {
  background: #ffffff;
  border-color: var(--color-accent-purple);
  color: var(--color-accent-purple);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.1);
}

.support-pill svg {
  width: 15px;
  height: 15px;
  color: var(--color-accent-blue);
}

/* ====================================================================
   使用场景 (场景插画光环与拟物分镜)
   ==================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.85rem;
}

.scenario-card {
  background: var(--color-surface);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(226, 232, 240, 0.85);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  box-shadow: var(--shadow-md);
  position: relative;
  transition: all var(--transition-smooth);
}

.scenario-card:hover {
  transform: translateY(-4px);
  border-color: rgba(236, 72, 153, 0.35);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(236, 72, 153, 0.1);
}

.scenario-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.35rem;
  color: var(--color-text-primary);
}

.scenario-devices {
  font-size: 0.875rem;
  color: var(--color-accent-purple);
  font-weight: 700;
  margin-bottom: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.scenario-desc {
  font-size: 0.975rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ====================================================================
   定价区块 (动漫神作级高光卡片)
   ==================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.85rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--color-surface);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.85rem;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-smooth);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

/* 推荐档位突出光效 */
.pricing-card.featured {
  background: rgba(255, 255, 255, 0.96);
  border: 2px solid var(--color-accent-purple);
  box-shadow: 0 12px 36px rgba(124, 58, 237, 0.18), 0 0 0 1px var(--color-accent-purple);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-6px);
  box-shadow: 0 18px 45px rgba(124, 58, 237, 0.28), 0 0 24px rgba(236, 72, 153, 0.2);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  right: 1.5rem;
  background: var(--color-accent-gradient);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 0.25rem 0.85rem;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.4);
  letter-spacing: 0.04em;
}

.pricing-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: 0.35rem;
}

.pricing-target {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1.35rem;
  font-weight: 500;
}

.pricing-price {
  margin-bottom: 1.65rem;
  border-bottom: 1px dashed var(--color-border);
  padding-bottom: 1.35rem;
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.price-val {
  font-size: 2.75rem;
  font-weight: 900;
  color: var(--color-text-primary);
  line-height: 1;
}

.price-period {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.pricing-specs {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.pricing-specs li {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  padding: 0.55rem 0;
  border-bottom: 1px dashed rgba(226, 232, 240, 0.8);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.pricing-specs li:last-child {
  border-bottom: none;
}

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

/* ====================================================================
   FAQ 手风琴 (折叠过渡与光晕)
   ==================================================================== */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-surface);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 0.85rem;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-smooth);
}

.faq-item:hover {
  border-color: rgba(124, 58, 237, 0.3);
  box-shadow: var(--shadow-md);
}

.faq-item summary {
  list-style: none;
  padding: 1.25rem 1.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--min-touch-size);
  user-select: none;
}

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

.faq-icon {
  font-size: 1.45rem;
  font-weight: 300;
  line-height: 1;
  color: var(--color-accent-purple);
  transition: transform var(--transition-smooth);
}

.faq-item[open] .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 1.5rem 1.35rem;
  font-size: 0.975rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
  border-top: 1px solid rgba(226, 232, 240, 0.8);
  padding-top: 1.15rem;
}

/* ====================================================================
   Final CTA 区块 (沉浸式星穹能量汇聚)
   ==================================================================== */
.final-cta {
  padding: 5.5rem 1.25rem;
  position: relative;
  z-index: 2;
  text-align: center;
}

.final-cta-inner {
  max-width: 760px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(124, 58, 237, 0.25);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  box-shadow: var(--shadow-lg), 0 0 35px rgba(124, 58, 237, 0.12);
  position: relative;
  overflow: hidden;
}

.final-cta-inner::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.final-cta-title {
  font-size: 2.25rem;
  font-weight: 900;
  color: var(--color-text-primary);
  margin-bottom: 1.15rem;
  letter-spacing: -0.02em;
}

.final-cta-desc {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  margin-bottom: 2.25rem;
  line-height: 1.7;
}

/* ====================================================================
   移动端吸底 CTA
   ==================================================================== */
.mobile-sticky-cta {
  display: none;
}

@media (max-width: 768px) {
  .mobile-sticky-cta {
    display: block;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid rgba(124, 58, 237, 0.2);
    padding: 0.75rem 1.25rem;
    z-index: 90;
    transform: translateY(120%);
    transition: transform var(--transition-smooth);
    box-shadow: 0 -4px 16px rgba(15, 23, 42, 0.08);
  }

  .mobile-sticky-cta.active {
    transform: translateY(0);
  }

  .mobile-sticky-cta .btn-primary {
    width: 100%;
  }

  body {
    padding-bottom: 68px;
  }
}

/* ====================================================================
   页脚
   ==================================================================== */
.site-footer {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  padding: 3.5rem 1.25rem 2.5rem;
  border-top: 1px solid var(--color-border);
  margin-top: auto;
  position: relative;
  z-index: 2;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.75rem;
  margin-bottom: 1.5rem;
  justify-content: center;
}

.footer-nav a {
  color: var(--color-text-secondary);
  font-size: 0.925rem;
  font-weight: 500;
  min-height: var(--min-touch-size);
  display: inline-flex;
  align-items: center;
  transition: color var(--transition-smooth);
}

.footer-nav a:hover {
  color: var(--color-accent-purple);
}

.footer-disclosure {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-align: center;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.footer-disclaimer {
  font-size: 0.825rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  text-align: center;
  max-width: 820px;
  margin: 0 auto 1.5rem;
}

.footer-copy {
  font-size: 0.825rem;
  color: var(--color-text-muted);
  text-align: center;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(226, 232, 240, 0.8);
}

/* ====================================================================
   内页与文章排版系统
   ==================================================================== */
.page-container {
  max-width: 880px;
  margin: 2.5rem auto 4.5rem;
  padding: 0 1.25rem;
  position: relative;
  z-index: 2;
}

.breadcrumb-nav {
  margin-bottom: 1.35rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.breadcrumb-nav a {
  color: var(--color-text-secondary);
  font-weight: 500;
}

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

.breadcrumb-separator {
  margin: 0 0.5rem;
  color: var(--color-border);
}

.article-card, .legal-card {
  background: var(--color-surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: var(--radius-lg);
  padding: 2.75rem 2.35rem;
  box-shadow: var(--shadow-md);
}

.page-title {
  font-size: 2.1rem;
  font-weight: 900;
  color: var(--color-text-primary);
  line-height: 1.35;
  margin-bottom: 0.95rem;
  letter-spacing: -0.02em;
}

.page-meta {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  padding-bottom: 1.15rem;
  border-bottom: 1px dashed var(--color-border);
  display: flex;
  gap: 1.35rem;
  flex-wrap: wrap;
}

.lead-box {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(124, 58, 237, 0.08));
  border-left: 4px solid var(--color-accent-purple);
  padding: 1.25rem 1.45rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.985rem;
  color: var(--color-text-secondary);
  margin-bottom: 2.25rem;
  line-height: 1.75;
}

.article-body h2, .legal-section h2 {
  font-size: 1.42rem;
  font-weight: 800;
  color: var(--color-text-primary);
  margin: 2.25rem 0 0.95rem;
  padding-top: 0.5rem;
}

.article-body h3, .legal-section h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 1.45rem 0 0.75rem;
}

.article-body p, .legal-section p {
  font-size: 0.985rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.78;
}

.article-body ul, .article-body ol, .legal-section ul, .legal-section ol {
  margin-bottom: 1.35rem;
  padding-left: 1.5rem;
  color: var(--color-text-secondary);
  font-size: 0.985rem;
  line-height: 1.78;
}

.article-body li, .legal-section li {
  margin-bottom: 0.45rem;
}

.article-faq-box {
  background: rgba(241, 245, 249, 0.7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.45rem;
  margin-bottom: 1.15rem;
}

.article-faq-q {
  font-weight: 800;
  font-size: 1.025rem;
  color: var(--color-text-primary);
  margin-bottom: 0.5rem;
}

.article-faq-a {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
  line-height: 1.7;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.06), rgba(124, 58, 237, 0.1));
  border: 1px solid rgba(124, 58, 237, 0.25);
  border-radius: var(--radius-md);
  padding: 2.5rem 2rem;
  text-align: center;
  margin: 2.75rem 0 2.25rem;
}

.article-cta-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: 0.65rem;
}

.article-cta-desc {
  font-size: 0.975rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

.article-crosslinks {
  border-top: 1px dashed var(--color-border);
  padding-top: 1.75rem;
  margin-top: 2.25rem;
}

.crosslinks-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: 0.95rem;
}

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

.crosslinks-list li {
  padding: 0.45rem 0;
  font-size: 0.95rem;
}

/* 教程目录列表 (卡片展示) */
.guide-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 1.75rem;
}

.guide-item {
  border: 1px solid rgba(226, 232, 240, 0.85);
  border-radius: var(--radius-md);
  padding: 1.65rem;
  background: var(--color-surface);
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  transition: all var(--transition-smooth);
}

.guide-item:hover {
  transform: translateY(-3px);
  border-color: rgba(124, 58, 237, 0.35);
  box-shadow: var(--shadow-md);
}

.guide-thumb-wrap {
  width: 82px;
  height: 82px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(124, 58, 237, 0.15));
  border: 1px solid rgba(124, 58, 237, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent-purple);
  flex-shrink: 0;
}

.guide-thumb-wrap svg {
  width: 38px;
  height: 38px;
}

.guide-content-wrap {
  flex: 1;
}

.guide-item-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.45rem;
  line-height: 1.4;
}

.guide-item-desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.85rem;
  line-height: 1.65;
}

.guide-item-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.guide-item-link {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-accent-purple);
  margin-left: auto;
}

/* 网站地图样式 */
.sitemap-group {
  margin-bottom: 2.25rem;
}

.sitemap-group-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: 0.95rem;
  border-bottom: 1px dashed var(--color-border);
  padding-bottom: 0.5rem;
}

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

.sitemap-links li {
  padding: 0.5rem 0;
  font-size: 0.975rem;
}

/* ====================================================================
   移动端响应式与汉堡菜单展开
   ==================================================================== */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 1.25rem 1.5rem 1.75rem;
    gap: 0.65rem;
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
  }

  .main-nav.nav-open {
    display: flex;
  }

  .main-nav .nav-link,
  .main-nav .btn-primary {
    width: 100%;
    justify-content: flex-start;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .features-grid,
  .support-split,
  .scenarios-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card.featured {
    transform: none;
  }

  .guide-item {
    flex-direction: column;
    gap: 1rem;
  }

  .guide-thumb-wrap {
    width: 58px;
    height: 58px;
  }

  .guide-thumb-wrap svg {
    width: 30px;
    height: 30px;
  }

  .header-container {
    padding: 0.75rem 1rem;
  }

  .article-card, .legal-card {
    padding: 1.65rem 1.25rem;
  }

  .page-title {
    font-size: 1.65rem;
  }
}

/* ====================================================================
   渐进增强滚动视差与 3D 悬浮 (Scroll Reveal & 3D Tilt)
   ==================================================================== */
.feature-card,
.support-card,
.scenario-card,
.pricing-card {
  will-change: transform;
  transform-style: preserve-3d;
}

.js-enabled .anime-reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1), transform 0.55s cubic-bezier(0.16, 1, 0.3, 1);
}

.js-enabled .anime-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 动效降级支持 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .js-enabled .anime-reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}