/* ===================================================================
   XX云加速 xxyunjiasu - 风格 06 · 霓虹云城 核心全局样式库
   暗夜紫黑 #0E0B1E | 霓虹粉 #FF5C9D | 电光青 #40DCFF | 冷白正文 #F5F3FF
   纯原生 CSS，0 外部依赖，秒级加载，完全统一主站与科普页视觉气质
   =================================================================== */

:root {
  /* 基础暗夜紫黑背景与赛博卡片 */
  --bg-cyber: #0E0B1E;
  --bg-main: #0E0B1E;
  --bg-card: rgba(28, 20, 58, 0.65);
  --bg-card-hover: rgba(38, 26, 80, 0.85);

  /* 双强调色：霓虹粉与电光青 */
  --neon-pink: #FF5C9D;
  --neon-pink-glow: rgba(255, 92, 157, 0.45);
  --neon-pink-subtle: rgba(255, 92, 157, 0.12);

  --electric-cyan: #40DCFF;
  --electric-cyan-glow: rgba(64, 220, 255, 0.45);
  --electric-cyan-subtle: rgba(64, 220, 255, 0.12);

  /* 边框色系统 */
  --border-cyber: rgba(255, 92, 157, 0.25);
  --border-cyan: rgba(64, 220, 255, 0.25);
  --border-color: rgba(255, 92, 157, 0.22);
  --border-focus: rgba(64, 220, 255, 0.5);

  /* 品牌核心变量映射 */
  --primary: #FF5C9D;
  --primary-light: #40DCFF;
  --accent: #E11D48;
  --accent-glow: rgba(255, 92, 157, 0.35);

  /* 冷白与层级文字颜色 */
  --text-white: #F5F3FF;
  --text-main: #F5F3FF;
  --text-dim: #A59AC0;
  --text-muted: #A59AC0;
  --text-darker: #6C5D88;

  /* 状态指示色 */
  --success: #10B981;
  --warning: #F59E0B;

  /* 版心容器与圆角 */
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  /* 字体气质 */
  --font-headline: "Noto Sans SC", "Source Han Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-numbers: "Space Grotesk", "SF Pro Display", "Roboto Mono", Consolas, monospace;

  /* 过渡动画 */
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  background-color: var(--bg-cyber);
  color: var(--text-white);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  scroll-behavior: smooth;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* 全屏固定 Canvas (霓虹天际线 + 霓虹光雨 + 地平线光晕, 60fps) */
#cyber-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

/* 页面内容承载层 (提升至 Canvas 之上) */
.page-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

img, svg {
  display: block;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.num-font {
  font-family: var(--font-numbers);
  font-feature-settings: "tnum";
}

/* 霓虹圆点与徽章点缀 */
.neon-pill-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-pink);
  box-shadow: 0 0 10px var(--neon-pink);
}

.neon-cyan-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--electric-cyan);
  box-shadow: 0 0 10px var(--electric-cyan);
}

/* ================= 头部导航栏 ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(14, 11, 30, 0.84);
  border-bottom: 1px solid var(--border-cyber);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--text-white);
  letter-spacing: -0.02em;
}

.brand-logo-icon {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--neon-pink);
  border-radius: var(--radius-sm);
  background: rgba(255, 92, 157, 0.1);
  box-shadow: 0 0 14px var(--neon-pink-glow);
}

.brand-logo span {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-logo .brand-sub {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--electric-cyan);
  letter-spacing: 0.08em;
  text-shadow: 0 0 8px var(--electric-cyan-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-dim);
  font-weight: 600;
  position: relative;
  padding: 6px 0;
}

.nav-links a:hover {
  color: var(--electric-cyan);
  text-shadow: 0 0 10px var(--electric-cyan);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-pink), var(--electric-cyan));
  box-shadow: 0 0 8px var(--neon-pink);
  transition: var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

/* ================= 按钮规范 ================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, #FF5C9D 0%, #E11D48 40%, #40DCFF 100%);
  color: #FFFFFF;
  border-color: rgba(255, 92, 157, 0.7);
  box-shadow: 0 0 22px var(--neon-pink-glow), 0 0 10px rgba(64, 220, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.15);
  box-shadow: 0 0 32px rgba(255, 92, 157, 0.75), 0 0 18px var(--electric-cyan);
}

.btn-secondary {
  background: rgba(28, 20, 58, 0.85);
  border-color: var(--border-cyan);
  color: var(--text-white);
}

.btn-secondary:hover {
  background: rgba(38, 26, 80, 0.95);
  border-color: var(--electric-cyan);
  color: var(--electric-cyan);
  box-shadow: 0 0 18px var(--electric-cyan-glow);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

/* ================= 页面通用区块样式 ================= */
.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--neon-pink);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 12px;
  padding: 5px 14px;
  background: var(--neon-pink-subtle);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-full);
}

.section-title {
  font-size: clamp(2rem, 3.8vw, 2.75rem);
  font-weight: 900;
  color: var(--text-white);
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-dim);
  max-width: 680px;
  margin: 0 auto;
}

/* ================= 核心优势 3 个图文卡片 ================= */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--neon-pink), var(--electric-cyan));
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  border-color: var(--electric-cyan);
  box-shadow: 0 12px 36px rgba(64, 220, 255, 0.2), 0 0 20px var(--neon-pink-subtle);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: rgba(255, 92, 157, 0.12);
  border: 1px solid var(--border-cyber);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neon-pink);
  margin-bottom: 22px;
  box-shadow: 0 0 16px var(--neon-pink-glow);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-white);
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ================= 流媒体与 AI 支持图卡 ================= */
.services-wrapper {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-md);
  padding: 36px;
  position: relative;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.service-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.service-card-header h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-white);
}

.service-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.service-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(28, 20, 58, 0.8);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-white);
}

.service-badge svg {
  color: var(--electric-cyan);
}

.service-status-pill {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--electric-cyan);
  background: rgba(64, 220, 255, 0.12);
  border: 1px solid rgba(64, 220, 255, 0.35);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--electric-cyan);
  box-shadow: 0 0 8px var(--electric-cyan);
}

/* ================= 套餐价格对比表 ================= */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-md);
  padding: 40px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.pricing-card.popular {
  border-color: var(--neon-pink);
  background: rgba(38, 24, 75, 0.85);
  box-shadow: 0 0 35px var(--neon-pink-glow), 0 10px 40px rgba(0, 0, 0, 0.6);
  transform: translateY(-8px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #FF5C9D, #7928CA);
  color: #FFFFFF;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 5px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  white-space: nowrap;
  box-shadow: 0 0 14px var(--neon-pink-glow);
}

.pricing-card:hover {
  border-color: var(--electric-cyan);
  box-shadow: 0 14px 40px rgba(64, 220, 255, 0.25);
}

/* ================= 常见问题解答 FAQ ================= */
.faq-wrapper {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.faq-item[open] {
  border-color: var(--electric-cyan);
  background: var(--bg-card-hover);
  box-shadow: 0 0 24px rgba(64, 220, 255, 0.18);
}

.faq-summary {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--text-white);
  list-style: none;
  user-select: none;
}

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

.faq-summary:hover {
  color: var(--electric-cyan);
  text-shadow: 0 0 10px var(--electric-cyan-glow);
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--neon-pink);
  transition: var(--transition);
  flex-shrink: 0;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
  color: var(--electric-cyan);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-dim);
  line-height: 1.7;
  border-top: 1px solid rgba(255, 92, 157, 0.12);
  margin-top: 4px;
  padding-top: 16px;
}

/* ================= 呼吁购买 CTA 区块 ================= */
.cta-section {
  padding: 80px 0 100px;
}

.cta-box {
  background: linear-gradient(135deg, rgba(255, 92, 157, 0.18) 0%, rgba(64, 220, 255, 0.14) 100%), var(--bg-card);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 30px var(--neon-pink-subtle);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.cta-box h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 900;
  margin-bottom: 16px;
  color: var(--text-white);
}

.cta-box p {
  font-size: 1.05rem;
  color: var(--text-dim);
  max-width: 620px;
  margin: 0 auto 32px;
}

/* ================= 底部页脚 ================= */
.site-footer {
  border-top: 1px solid var(--border-cyber);
  background: rgba(14, 11, 30, 0.95);
  padding: 48px 0 32px;
  margin-top: auto;
}

.footer-brand {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--text-white);
  margin-bottom: 24px;
  text-align: center;
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 36px;
  list-style: none;
  margin-bottom: 24px;
}

.footer-nav a {
  font-size: 0.95rem;
  color: var(--text-dim);
  font-weight: 600;
}

.footer-nav a:hover {
  color: var(--electric-cyan);
  text-shadow: 0 0 8px var(--electric-cyan);
}

.footer-copy {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-darker);
}

/* ===================================================================
   独立子页面通用容器 (科普页、评测文章、关于我们、隐私、条款、地图)
   =================================================================== */
.subpage-container {
  background: var(--bg-card);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  margin: 40px auto 60px;
  max-width: 860px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55), 0 0 35px var(--neon-pink-subtle);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.subpage-container.wide {
  max-width: 1140px;
}

.subpage-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-cyber);
}

.subpage-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 900;
  font-family: var(--font-headline);
  line-height: 1.25;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #FF5C9D 0%, #FFFFFF 50%, #40DCFF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subpage-meta {
  font-size: 0.9rem;
  color: var(--text-dim);
}

.subpage-body {
  color: var(--text-white);
  font-size: 1rem;
  line-height: 1.85;
}

.subpage-body h2 {
  font-size: 1.35rem;
  font-weight: 800;
  margin: 36px 0 16px;
  color: var(--electric-cyan);
  text-shadow: 0 0 10px var(--electric-cyan-glow);
  display: flex;
  align-items: center;
  gap: 10px;
}

.subpage-body h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 18px;
  background: linear-gradient(180deg, var(--neon-pink), var(--electric-cyan));
  border-radius: 2px;
  box-shadow: 0 0 8px var(--neon-pink);
}

.subpage-body p {
  margin-bottom: 18px;
  color: var(--text-white);
}

.subpage-body strong {
  color: var(--text-white);
  font-weight: 700;
}

.subpage-body ul, 
.subpage-body ol {
  padding-left: 24px;
  margin-bottom: 24px;
  color: var(--text-dim);
}

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

.subpage-body li strong {
  color: var(--text-white);
}

.callout-box {
  background: rgba(255, 92, 157, 0.08);
  border-left: 4px solid var(--neon-pink);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin: 28px 0;
  color: var(--text-white);
  box-shadow: 0 0 20px var(--neon-pink-subtle);
  backdrop-filter: blur(12px);
}

.callout-box strong {
  color: var(--neon-pink);
}

/* 子页面表格样式 */
.subpage-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.95rem;
  color: var(--text-dim);
  background: rgba(28, 20, 58, 0.5);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-cyber);
}

.subpage-body thead tr {
  background: rgba(255, 92, 157, 0.12);
  border-bottom: 2px solid var(--border-cyber);
  text-align: left;
  color: var(--neon-pink);
  font-weight: 800;
}

.subpage-body th, 
.subpage-body td {
  padding: 12px 16px;
}

.subpage-body tbody tr {
  border-bottom: 1px solid rgba(255, 92, 157, 0.12);
  transition: var(--transition);
}

.subpage-body tbody tr:hover {
  background: rgba(38, 26, 80, 0.7);
}

/* ================= 知识科普 3x3 矩阵网格 ================= */
.articles-grid-3x3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 32px 0 44px;
}

.article-card-3x3 {
  background: var(--bg-card);
  border: 1px solid var(--border-cyber);
  border-radius: var(--radius-md);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.article-card-3x3::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-pink), var(--electric-cyan));
  opacity: 0;
  transition: var(--transition);
}

.article-card-3x3:hover {
  transform: translateY(-5px);
  border-color: var(--electric-cyan);
  background: var(--bg-card-hover);
  box-shadow: 0 14px 36px rgba(64, 220, 255, 0.22), 0 0 20px var(--neon-pink-subtle);
}

.article-card-3x3:hover::before {
  opacity: 1;
}

.article-card-3x3 .card-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--neon-pink);
  background: var(--neon-pink-subtle);
  border: 1px solid rgba(255, 92, 157, 0.35);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  box-shadow: 0 0 10px rgba(255, 92, 157, 0.2);
}

.article-card-3x3 h3 {
  font-size: 1.08rem;
  font-weight: 800;
  line-height: 1.45;
  margin-bottom: 10px;
  color: var(--text-white);
}

.article-card-3x3 p {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 18px;
}

.article-card-3x3 .read-link {
  font-size: 0.9rem;
  color: var(--electric-cyan);
  font-weight: 700;
  text-shadow: 0 0 8px var(--electric-cyan-glow);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  transition: var(--transition);
}

.article-card-3x3:hover .read-link {
  transform: translateX(4px);
  color: #FFFFFF;
  text-shadow: 0 0 12px var(--electric-cyan);
}

/* ================= 文章专属 FAQ 与 内链推荐组件 ================= */
.article-faq-section {
  margin: 40px 0 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border-cyber);
}

.article-faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 18px;
}

.article-related-section {
  margin: 36px 0 28px;
  padding: 24px 24px;
  background: rgba(28, 20, 58, 0.75);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-md);
  box-shadow: 0 0 20px rgba(64, 220, 255, 0.1);
  backdrop-filter: blur(16px);
}

.article-related-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--electric-cyan);
  text-shadow: 0 0 10px var(--electric-cyan-glow);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-related-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.article-related-links li a {
  color: var(--text-white);
  font-size: 0.94rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.article-related-links li a:hover {
  color: var(--neon-pink);
  transform: translateX(4px);
  text-shadow: 0 0 8px var(--neon-pink-glow);
}

/* ================= 响应式适配 (@media 媒体查询) ================= */
@media (max-width: 992px) {
  .features-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .services-wrapper {
    grid-template-columns: 1fr;
  }

  .articles-grid-3x3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .articles-grid-3x3 {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .nav-wrapper {
    height: auto;
    padding: 14px 0;
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav-links {
    display: flex;
    order: 3;
    width: 100%;
    overflow-x: auto;
    white-space: nowrap;
    gap: 14px;
    padding: 6px 2px 8px;
    -webkit-overflow-scrolling: touch;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-links a {
    font-size: 0.88rem;
    padding: 6px 14px;
    background: rgba(28, 20, 58, 0.8);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-cyber);
  }

  .btn {
    min-height: 48px;
    padding: 12px 22px;
    font-size: 0.98rem;
  }

  .footer-nav {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

  .subpage-container {
    padding: 28px 20px;
    margin: 20px auto 40px;
  }

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


/* ================= 键盘无障碍与跳过主要内容入口 ================= */
.skip-link {
  position: absolute;
  top: -80px;
  left: 20px;
  background: var(--electric-cyan);
  color: #0E0B1E;
  padding: 12px 20px;
  font-weight: 800;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  z-index: 9999;
  transition: top 0.2s ease;
  text-decoration: none;
  box-shadow: 0 0 16px var(--electric-cyan-glow);
}

.skip-link:focus-visible {
  top: 16px;
  outline: 3px solid var(--neon-pink);
}

/* 焦点可见性与键盘导航高亮 */
:focus-visible {
  outline: 2px solid var(--electric-cyan);
  outline-offset: 3px;
}

/* 锚点滚动距离防页眉遮挡 (页眉高度约 74px) */
[id] {
  scroll-margin-top: 88px;
}

/* 网站地图结构列表样式 */
.sitemap-section-list {
  list-style: none;
  padding-left: 0;
  margin-bottom: 28px;
}

.sitemap-section-list li {
  margin-bottom: 14px;
  line-height: 1.6;
}

.sitemap-link {
  color: var(--primary-light);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}

.sitemap-link:hover,
.sitemap-link:focus-visible {
  color: var(--neon-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.sitemap-desc {
  color: var(--text-dim);
  font-size: 0.95rem;
}

/* 系统减弱动效偏好适配 (WCAG 2.1) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  #cyber-canvas {
    display: none !important;
  }
}