/* ==========================================================================
   飞鸟机场 (feiniao-jichang.homes) - 全站核心样式系统 (style.css)
   世界观：赛博茶馆 (Cyber Teahouse)
   画风：赛璐璐平涂 (Cel Shading - 明确硬边、高对比线稿与几何块面)
   版式原型：游戏 HUD (Gaming HUD - 遥测数据框、切角标签、发光准星与状态指示)
   配色系统：主色相 343° 霓虹绯红 (#e11d48) + 互补色 163° 翡翠茶青 (#10b981)
   招牌动效：卷轴展开 (Scroll Unfurl - 几何面板平滑横纵展开，无多余微动)
   辅助动效：无（严格遵循运行卡）
   规范：纯原生 CSS3，零外部依赖，移动端优先，语义化无障碍
   ========================================================================== */

:root {
  --font-base: -apple-system, BlinkMacSystemFont, "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;

  /* 配色系统 (主色相 343° 互补色) */
  --cyber-bg: #0b0f17;
  --cyber-bg-surface: #121824;
  --cyber-bg-card: #162030;
  --cyber-bg-elevated: #1d2a3f;
  --cyber-bg-glass: rgba(18, 24, 36, 0.94);

  /* 主色相 343° (赛博绯红 / 胭脂霓虹) */
  --accent-crimson: #e11d48;
  --accent-crimson-hover: #f43f5e;
  --accent-crimson-active: #be123c;
  --accent-crimson-soft: rgba(225, 29, 72, 0.12);
  --accent-crimson-glow: rgba(225, 29, 72, 0.35);

  /* 互补色相 163° (翡翠玉青 / 冷茶绿) */
  --complement-jade: #10b981;
  --complement-jade-hover: #34d399;
  --complement-jade-soft: rgba(16, 185, 129, 0.12);
  --complement-jade-glow: rgba(16, 185, 129, 0.35);

  /* 文字系统 (高对比度平涂) */
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #8494ab;
  --text-inverse: #0b0f17;

  /* 边框与 HUD 线框 (赛璐璐硬边质感) */
  --border-hud: #24324a;
  --border-hud-crimson: rgba(225, 29, 72, 0.45);
  --border-hud-jade: rgba(16, 185, 129, 0.45);
  --border-solid-thick: 2px solid #24324a;

  /* 尺寸与切角 */
  --container-max: 1160px;
  --content-max: 840px;
  --radius-hud: 4px;
  --radius-tag: 2px;

  /* 阴影与 HUD 描边 */
  --shadow-hud: 0 4px 16px rgba(0, 0, 0, 0.45), 0 0 0 1px #24324a;
  --shadow-hud-hover: 0 8px 24px rgba(225, 29, 72, 0.2), 0 0 0 1px var(--accent-crimson);
}

/* 全局重置与 HUD 底纹 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-primary);
  background-color: var(--cyber-bg);
  background-image: 
    linear-gradient(rgba(36, 50, 74, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 50, 74, 0.15) 1px, transparent 1px);
  background-size: 40px 40px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

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

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

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

/* 布局容器 */
.site-container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

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

/* 招牌动效：卷轴展开 (Scroll Unfurl) */
@keyframes scrollUnfurl {
  0% {
    clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
    opacity: 0;
    transform: translateY(-8px);
  }
  100% {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    opacity: 1;
    transform: translateY(0);
  }
}

.unfurl-target {
  animation: scrollUnfurl 0.55s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@media (prefers-reduced-motion: reduce) {
  .unfurl-target {
    animation: none;
    opacity: 1;
    clip-path: none;
    transform: none;
  }
}

/* 顶部导航 Header (HUD 抬头显示风格) */
.hud-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--cyber-bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--border-hud);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

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

.hud-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hud-logo svg {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  filter: drop-shadow(0 0 8px var(--accent-crimson-glow));
}

.hud-logo__badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-crimson-hover);
  background: var(--accent-crimson-soft);
  border: 1px solid var(--border-hud-crimson);
  padding: 2px 8px;
  border-radius: var(--radius-tag);
  font-family: var(--font-mono);
}

.hud-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

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

.hud-nav__link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 6px 4px;
  position: relative;
  transition: all 0.15s ease;
}

.hud-nav__link:hover,
.hud-nav__link.active {
  color: var(--text-primary);
}

.hud-nav__link.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-crimson);
  box-shadow: 0 0 8px var(--accent-crimson);
}

.mobile-nav-toggle {
  display: none;
  background: var(--cyber-bg-card);
  border: 1px solid var(--border-hud);
  border-radius: var(--radius-hud);
  padding: 8px;
  cursor: pointer;
  color: var(--text-primary);
}

/* 按钮规范 (赛璐璐平涂 & 游戏 HUD 风格) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 10px 24px;
  border-radius: var(--radius-hud);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: center;
  line-height: 1.2;
  position: relative;
  font-family: var(--font-base);
}

.btn-primary {
  background: var(--accent-crimson);
  color: #ffffff;
  border-color: var(--accent-crimson-hover);
  box-shadow: 0 0 16px var(--accent-crimson-glow);
}

.btn-primary:hover {
  background: var(--accent-crimson-hover);
  color: #ffffff;
  box-shadow: 0 0 24px var(--accent-crimson-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--cyber-bg-card);
  color: var(--text-primary);
  border-color: var(--border-hud);
}

.btn-secondary:hover {
  background: var(--cyber-bg-elevated);
  border-color: var(--complement-jade);
  color: var(--complement-jade-hover);
}

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

.btn-block {
  width: 100%;
}

/* Hero 首屏 (赛博茶馆 HUD 监视台) */
.hero-section {
  padding: 80px 0 70px;
  position: relative;
  border-bottom: 2px solid var(--border-hud);
  background: radial-gradient(circle at 50% 10%, rgba(225, 29, 72, 0.12) 0%, transparent 70%);
}

.hero-inner {
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hud-telemetry-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--cyber-bg-card);
  border: 1px solid var(--border-hud-crimson);
  padding: 6px 16px;
  border-radius: var(--radius-hud);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-crimson-hover);
  margin-bottom: 24px;
  font-family: var(--font-mono);
}

.hud-dot-live {
  width: 8px;
  height: 8px;
  background: var(--complement-jade);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 8px var(--complement-jade);
}

.hero-title {
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 22px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 42px;
}

.hero-telemetry-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
  padding-top: 14px;
}

.telemetry-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.telemetry-item svg {
  width: 18px;
  height: 18px;
  color: var(--complement-jade);
}

/* 核心模块公用排版 */
.section {
  padding: 85px 0;
  position: relative;
  border-bottom: 2px solid var(--border-hud);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 54px;
}

.hud-section-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--complement-jade);
  background: var(--complement-jade-soft);
  border: 1px solid var(--border-hud-jade);
  padding: 4px 12px;
  border-radius: var(--radius-tag);
  margin-bottom: 14px;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.35;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   首页中间模块 1：AI 工具访问支持 (ChatGPT/Claude/Gemini/Perplexity/Copilot/Cursor)
   -------------------------------------------------------------------------- */
.ai-support-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.ai-card {
  background: var(--cyber-bg-surface);
  border: 2px solid var(--border-hud);
  border-radius: var(--radius-hud);
  padding: 24px;
  box-shadow: var(--shadow-hud);
  transition: all 0.2s ease;
  position: relative;
}

.ai-card:hover {
  border-color: var(--complement-jade);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.15);
}

.ai-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.ai-card__name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.ai-card__status {
  font-size: 0.75rem;
  color: var(--complement-jade);
  background: var(--complement-jade-soft);
  padding: 2px 8px;
  border-radius: var(--radius-tag);
  font-weight: 700;
}

.ai-card__desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   首页中间模块 2：定价卡片 (4档，月付年付切换标签，推荐中档)
   -------------------------------------------------------------------------- */
.pricing-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
}

.pricing-tab-btn {
  background: var(--cyber-bg-card);
  border: 2px solid var(--border-hud);
  color: var(--text-secondary);
  padding: 8px 24px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-hud);
  cursor: pointer;
  transition: all 0.15s ease;
}

.pricing-tab-btn.active {
  background: var(--accent-crimson);
  color: #ffffff;
  border-color: var(--accent-crimson-hover);
  box-shadow: 0 0 12px var(--accent-crimson-glow);
}

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

.pricing-hud-card {
  background: var(--cyber-bg-surface);
  border: 2px solid var(--border-hud);
  border-radius: var(--radius-hud);
  padding: 30px 22px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-hud);
  transition: all 0.2s ease;
}

.pricing-hud-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-hud-crimson);
}

.pricing-hud-card--popular {
  border-color: var(--accent-crimson);
  background: linear-gradient(180deg, rgba(225, 29, 72, 0.08) 0%, var(--cyber-bg-surface) 100%);
  box-shadow: 0 0 24px rgba(225, 29, 72, 0.25);
}

.pricing-hud-ribbon {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-crimson);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 2px 14px;
  border-radius: var(--radius-tag);
  box-shadow: 0 0 10px var(--accent-crimson-glow);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.pricing-tier-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.pricing-tier-audience {
  font-size: 0.86rem;
  color: var(--text-muted);
  min-height: 44px;
  line-height: 1.5;
  margin-bottom: 20px;
}

.pricing-official-badge {
  background: var(--cyber-bg-card);
  border: 1px solid var(--border-hud);
  padding: 12px;
  border-radius: var(--radius-hud);
  text-align: center;
  margin-bottom: 22px;
}

.pricing-official-badge__main {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--accent-crimson-hover);
}

.pricing-official-badge__sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.pricing-feature-list {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.pricing-feature-list li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  line-height: 1.45;
}

.pricing-feature-list li svg {
  width: 16px;
  height: 16px;
  color: var(--complement-jade);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   首页中间模块 3：FAQ 单列手风琴 (5条)
   -------------------------------------------------------------------------- */
.faq-hud-container {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-hud-item {
  background: var(--cyber-bg-surface);
  border: 2px solid var(--border-hud);
  border-radius: var(--radius-hud);
  overflow: hidden;
  box-shadow: var(--shadow-hud);
  transition: border-color 0.2s ease;
}

.faq-hud-item:hover {
  border-color: var(--border-hud-crimson);
}

.faq-hud-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  gap: 16px;
  font-family: var(--font-base);
}

.faq-hud-icon {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.faq-hud-item.active .faq-hud-icon {
  transform: rotate(180deg);
  color: var(--accent-crimson-hover);
}

.faq-hud-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
}

.faq-hud-item.active .faq-hud-content {
  max-height: 500px;
  padding: 0 24px 22px 24px;
}

.faq-hud-content p {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   首页中间模块 4：使用场景 (4张，形态：卡片)
   -------------------------------------------------------------------------- */
.scenario-hud-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.scenario-hud-card {
  background: var(--cyber-bg-surface);
  border: 2px solid var(--border-hud);
  border-radius: var(--radius-hud);
  padding: 24px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-hud);
}

.scenario-hud-tag {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-crimson-hover);
  background: var(--accent-crimson-soft);
  border: 1px solid var(--border-hud-crimson);
  padding: 2px 8px;
  border-radius: var(--radius-tag);
  align-self: flex-start;
  margin-bottom: 14px;
  font-family: var(--font-mono);
}

.scenario-hud-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.scenario-hud-devices {
  font-size: 0.85rem;
  color: var(--complement-jade);
  margin-bottom: 14px;
  font-family: var(--font-mono);
}

.scenario-hud-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex-grow: 1;
}

/* --------------------------------------------------------------------------
   首页中间模块 5：特性 (6项，形态：图文左右交错)
   -------------------------------------------------------------------------- */
.features-interleaved {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  background: var(--cyber-bg-surface);
  border: 2px solid var(--border-hud);
  border-radius: var(--radius-hud);
  padding: 36px 40px;
  box-shadow: var(--shadow-hud);
}

.feature-row--reversed {
  direction: rtl;
}

.feature-row--reversed > * {
  direction: ltr;
}

.feature-media {
  background: var(--cyber-bg-card);
  border: 1px solid var(--border-hud);
  border-radius: var(--radius-hud);
  padding: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-media svg {
  width: 100%;
  max-width: 220px;
  height: auto;
  filter: drop-shadow(0 0 12px rgba(225, 29, 72, 0.2));
}

.feature-content h3 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.feature-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   首页中间模块 6：人群对照 (学生 / 上班族 / 商务 三列对照)
   -------------------------------------------------------------------------- */
.audience-table-wrapper {
  overflow-x: auto;
  background: var(--cyber-bg-surface);
  border: 2px solid var(--border-hud);
  border-radius: var(--radius-hud);
  box-shadow: var(--shadow-hud);
}

.audience-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.audience-table th, .audience-table td {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-hud);
}

.audience-table th {
  background: var(--cyber-bg-card);
  color: var(--text-primary);
  font-weight: 800;
  font-size: 1.05rem;
}

.audience-table tr:last-child td {
  border-bottom: none;
}

.audience-table td strong {
  color: var(--text-primary);
}

.audience-table td .rec-tag {
  display: inline-block;
  background: var(--accent-crimson);
  color: #ffffff;
  padding: 2px 8px;
  border-radius: var(--radius-tag);
  font-size: 0.78rem;
  font-weight: 700;
}

/* Final CTA 区块 */
.final-cta-section {
  padding: 85px 0;
  background: radial-gradient(circle at 50% 50%, rgba(225, 29, 72, 0.15) 0%, var(--cyber-bg) 80%);
  text-align: center;
  border-bottom: 2px solid var(--border-hud);
}

.final-cta-inner {
  max-width: 720px;
  margin: 0 auto;
}

.final-cta-title {
  font-size: 2.25rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 18px;
  line-height: 1.3;
}

.final-cta-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  line-height: 1.65;
}

/* 页脚 Footer */
.hud-footer {
  background: var(--cyber-bg);
  border-top: 2px solid var(--border-hud);
  padding: 60px 0 30px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.hud-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.hud-footer__brand-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.hud-footer__brand-desc {
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 360px;
}

.hud-footer__col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

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

.hud-footer__col-links a {
  color: var(--text-muted);
}

.hud-footer__col-links a:hover {
  color: var(--text-primary);
}

.hud-footer__bottom {
  border-top: 1px solid var(--border-hud);
  padding-top: 26px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hud-footer__disclosure {
  font-size: 0.85rem;
  color: var(--accent-crimson-hover);
}

.hud-footer__copy {
  font-size: 0.82rem;
  color: #4b5563;
}

/* 移动端吸底 CTA 栏 */
.mobile-sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  background: rgba(14, 17, 23, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 12px 20px;
  border-top: 2px solid var(--accent-crimson);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.6);
}

.mobile-sticky-cta__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.mobile-sticky-cta__text {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
}

.mobile-sticky-cta__sub {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ==========================================================================
   文章与合规页面排版系统
   ========================================================================== */
.page-header {
  padding: 55px 0 35px;
  border-bottom: 2px solid var(--border-hud);
  background: var(--cyber-bg-surface);
  margin-bottom: 45px;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-family: var(--font-mono);
}

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

.breadcrumb-nav a:hover {
  color: var(--complement-jade);
}

.page-title {
  font-size: 2.25rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 14px;
}

.page-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.article-content {
  background: var(--cyber-bg-surface);
  border: 2px solid var(--border-hud);
  border-radius: var(--radius-hud);
  padding: 44px 40px;
  margin-bottom: 45px;
  box-shadow: var(--shadow-hud);
}

.article-lead {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-primary);
  background: var(--accent-crimson-soft);
  border-left: 4px solid var(--accent-crimson);
  padding: 20px 24px;
  border-radius: 0 var(--radius-hud) var(--radius-hud) 0;
  margin-bottom: 36px;
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 42px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-hud);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 28px;
  margin-bottom: 14px;
}

.article-body p {
  font-size: 1.02rem;
  line-height: 1.85;
  margin-bottom: 22px;
  color: var(--text-secondary);
}

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

.article-body li {
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 30px 0;
  font-size: 0.95rem;
  background: var(--cyber-bg-card);
  border: 1px solid var(--border-hud);
}

.article-body th, .article-body td {
  border: 1px solid var(--border-hud);
  padding: 14px 18px;
  text-align: left;
}

.article-body th {
  background: #192334;
  color: var(--text-primary);
  font-weight: 800;
}

.article-body tr:nth-child(even) td {
  background: rgba(18, 24, 36, 0.4);
}

.callout-box {
  background: var(--cyber-bg-card);
  border: 1px solid var(--border-hud);
  border-radius: var(--radius-hud);
  padding: 22px 24px;
  margin: 26px 0;
}

.callout-box--warning {
  border-color: rgba(225, 29, 72, 0.5);
  background: rgba(225, 29, 72, 0.06);
}

.callout-box__title {
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-internal-links {
  background: var(--cyber-bg-card);
  border: 1px solid var(--border-hud);
  border-radius: var(--radius-hud);
  padding: 24px;
  margin: 36px 0;
}

.article-internal-links__title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.article-internal-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.article-cta-box {
  background: linear-gradient(135deg, #162030 0%, #1e1122 100%);
  border: 2px solid var(--border-hud-crimson);
  border-radius: var(--radius-hud);
  padding: 38px 30px;
  text-align: center;
  color: #ffffff;
  margin-top: 42px;
  box-shadow: 0 0 24px rgba(225, 29, 72, 0.15);
}

.article-cta-box__title {
  font-size: 1.55rem;
  font-weight: 900;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.article-cta-box__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}

/* 指南页列表网格 */
.guide-list-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 50px;
}

.guide-item-card {
  background: var(--cyber-bg-surface);
  border: 2px solid var(--border-hud);
  border-radius: var(--radius-hud);
  padding: 30px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-hud);
  transition: all 0.2s ease;
}

.guide-item-card:hover {
  transform: translateY(-3px);
  border-color: var(--complement-jade);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.2);
}

.guide-item-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-crimson-hover);
  background: var(--accent-crimson-soft);
  border: 1px solid var(--border-hud-crimson);
  padding: 2px 8px;
  border-radius: var(--radius-tag);
  margin-bottom: 14px;
  align-self: flex-start;
  font-family: var(--font-mono);
}

.guide-item-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}

.guide-item-title a {
  color: var(--text-primary);
}

.guide-item-title a:hover {
  color: var(--complement-jade);
}

.guide-item-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex-grow: 1;
  margin-bottom: 20px;
}

.guide-item-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-hud);
  padding-top: 14px;
  font-family: var(--font-mono);
}

/* ==========================================================================
   响应式断点适配
   ========================================================================== */
@media (max-width: 1024px) {
  .pricing-grid-4,
  .scenario-hud-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hud-header__inner {
    height: 64px;
  }

  .mobile-nav-toggle {
    display: block;
  }

  .hud-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--cyber-bg-surface);
    border-bottom: 2px solid var(--border-hud);
    padding: 20px;
    flex-direction: column;
    align-items: stretch;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.6);
  }

  .hud-nav.active {
    display: flex;
  }

  .hud-nav__links {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 18px;
  }

  .hero-title {
    font-size: 1.95rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .ai-support-grid,
  .pricing-grid-4,
  .scenario-hud-grid,
  .guide-list-grid {
    grid-template-columns: 1fr;
  }

  .feature-row {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 24px;
  }

  .feature-row--reversed {
    direction: ltr;
  }

  .hud-footer__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .article-content {
    padding: 24px 18px;
  }

  .mobile-sticky-cta {
    display: block;
  }

  body {
    padding-bottom: 74px;
  }
}