/* ===================================================================
   妙妙云 (Miaomiaoyun) - 原生极速 CSS 样式表
   零重型依赖 · 纯原生 CSS · 响应式适配 · 秒开加载性能
   =================================================================== */

:root {
  --bg-main: #080c14;
  --bg-surface: #0f1626;
  --bg-card: rgba(18, 26, 44, 0.65);
  --bg-card-hover: rgba(28, 40, 68, 0.85);
  --bg-glass: rgba(15, 23, 42, 0.75);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-hover: rgba(99, 102, 241, 0.45);
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #818cf8;
  --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #06b6d4 100%);
  --primary-glow: rgba(99, 102, 241, 0.35);
  
  --accent-cyan: #06b6d4;
  --accent-purple: #a855f7;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --container-max: 1200px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.25);
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-main);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  line-height: 1.6;
  background: radial-gradient(ellipse at 50% 0%, #151d38 0%, var(--bg-main) 65%);
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

img, svg {
  display: block;
  max-width: 100%;
}

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

/* 渐变与强调色工具类 */
.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* 导航栏 (Header) */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  padding: 14px 0;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.logo-icon {
  width: 34px;
  height: 34px;
  background: var(--primary-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 0 14px var(--primary-glow);
}

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

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 移动端汉堡菜单控制（无 JS，纯 CSS 控制） */
.menu-toggle {
  display: none;
}
.menu-btn {
  display: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-primary);
}

/* 按钮通用规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
  border: 1px solid transparent;
  min-height: 44px;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 18px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.45);
  color: #ffffff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
  min-height: 38px;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
  min-height: 52px;
}

/* 主视觉区 (Hero Section) */
.hero {
  padding: 90px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 360px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.25) 0%, rgba(6, 182, 212, 0.1) 40%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-full);
  color: var(--primary-light);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 3.4rem;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 22px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 38px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

/* 核心指标条 (Metrics Banner) */
.metrics-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(12px);
  margin-top: 20px;
}

.metric-item {
  text-align: center;
  padding: 8px 12px;
  border-right: 1px solid var(--border-color);
}
.metric-item:last-child {
  border-right: none;
}

.metric-value {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* 区块通用标题 */
.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
}

.section-tag {
  color: var(--accent-cyan);
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
  display: block;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.6;
}

/* 核心优势卡片网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

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

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--primary-light);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

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

/* 流媒体与 AI 支持板块 */
.stream-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.media-card {
  background: linear-gradient(180deg, rgba(24, 34, 60, 0.7) 0%, rgba(13, 20, 36, 0.8) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 32px;
  position: relative;
  box-shadow: var(--shadow-card);
}

.media-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 18px;
}

.media-badge-ai {
  background: rgba(168, 85, 247, 0.2);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.4);
}

.media-badge-stream {
  background: rgba(6, 182, 212, 0.2);
  color: #38bdf8;
  border: 1px solid rgba(6, 182, 212, 0.4);
}

.media-card-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.media-card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 26px;
  line-height: 1.6;
}

.pill-tags-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.pill-tag {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
  transition: var(--transition);
}

.pill-tag:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-color-hover);
}

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

.bullet-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.bullet-list svg {
  color: var(--accent-green);
  flex-shrink: 0;
}

/* 价格对比表 (Pricing Section) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(30, 41, 75, 0.9) 0%, rgba(18, 25, 48, 0.9) 100%);
  border: 2px solid var(--primary);
  box-shadow: 0 10px 35px -5px rgba(99, 102, 241, 0.35);
  transform: scale(1.02);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.04) translateY(-6px);
}

.ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #fff;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.plan-header {
  margin-bottom: 24px;
  text-align: center;
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.plan-price-wrap {
  text-align: center;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.plan-price {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.plan-price .currency {
  font-size: 1.4rem;
  font-weight: 600;
  margin-right: 2px;
}

.plan-price .period {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 34px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

.plan-features li strong {
  color: var(--text-primary);
}

.plan-features svg {
  color: var(--accent-green);
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-btn {
  width: 100%;
}

/* 用户评价 (Testimonials) */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: var(--transition);
}

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

.review-stars {
  display: flex;
  gap: 4px;
  color: #fbbf24;
  margin-bottom: 16px;
}

.review-text {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4f46e5, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
}

.author-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.author-role {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 常见问题解答 (FAQ) */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

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

.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}

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

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.25s ease;
  color: var(--text-secondary);
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  margin-top: -6px;
  padding-top: 16px;
}

/* 底部行动召唤区 (Bottom CTA Banner) */
.cta-banner {
  margin: 80px auto 40px;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.25) 0%, rgba(6, 182, 212, 0.2) 100%);
  border: 1px solid rgba(99, 102, 241, 0.4);
  border-radius: var(--radius-lg);
  padding: 56px 36px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.6);
}

.cta-banner-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 14px;
}

.cta-banner-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
}

/* 页脚 (Footer) - 严格只保留四个标题 */
.footer {
  background: #05080e;
  border-top: 1px solid var(--border-color);
  padding: 46px 0 36px;
  margin-top: auto;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  list-style: none;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}

.footer-nav a:hover {
  color: var(--primary-light);
}

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

/* 内部详情页专有样式 (关于我们/条款/隐私/网站地图) */
.page-main {
  padding: 70px 0 100px;
}

.page-article {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px 42px;
  box-shadow: var(--shadow-card);
}

.page-title {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.page-meta {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 34px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.page-body h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 36px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
}

.page-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 22px 0 10px;
}

.page-body p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.75;
  margin-bottom: 16px;
}

.page-body ul, .page-body ol {
  color: var(--text-secondary);
  padding-left: 24px;
  margin-bottom: 20px;
  font-size: 0.98rem;
  line-height: 1.75;
}

.page-body li {
  margin-bottom: 8px;
}

.page-body .callout-box {
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 24px 0;
}

.page-body .callout-box strong {
  color: var(--primary-light);
}

/* 网站地图专用树形链接 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 24px;
}

.sitemap-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sitemap-card h3 {
  margin-top: 0;
  margin-bottom: 16px;
  color: var(--accent-cyan);
}

.sitemap-links {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sitemap-links a {
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.sitemap-links a:hover {
  color: var(--primary-light);
  transform: translateX(4px);
}

/* ===================================================================
   响应式媒体查询 (@media) - 确保手机端完美单栏展示与手指触控
   =================================================================== */

@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.8rem;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
}

@media (max-width: 768px) {
  /* 导航栏折叠为汉堡菜单 */
  .menu-btn {
    display: block;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }
  
  .menu-toggle:checked ~ .nav-links {
    display: flex;
  }

  /* 主视觉区适配 */
  .hero {
    padding: 50px 0 40px;
  }
  .hero-title {
    font-size: 2.2rem;
    letter-spacing: -0.5px;
  }
  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 28px;
  }
  .hero-cta {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
  .hero-cta .btn {
    width: 100%;
    min-height: 48px;
  }

  /* 核心指标条单栏/双栏 */
  .metrics-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    padding: 16px;
  }
  .metric-item {
    border-right: none;
    padding: 8px 4px;
  }
  .metric-item:nth-child(1), .metric-item:nth-child(2) {
    border-bottom: 1px solid var(--border-color);
  }
  .metric-value {
    font-size: 1.5rem;
  }

  /* 核心优势完全单栏 */
  .features-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .feature-card {
    padding: 24px 20px;
  }

  /* 流媒体与 AI 单栏 */
  .stream-ai-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .media-card {
    padding: 28px 20px;
  }

  /* 价格对比表完美单栏 */
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .pricing-card {
    padding: 32px 22px;
  }

  /* 用户评价单栏 */
  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .review-card {
    padding: 22px 18px;
  }

  /* 底部 CTA 单栏 */
  .cta-banner {
    padding: 36px 20px;
    margin: 50px auto 30px;
  }
  .cta-banner-title {
    font-size: 1.7rem;
  }
  .cta-banner .btn {
    width: 100%;
    min-height: 48px;
  }

  /* 页脚链接横向折叠为两栏或居中堆叠 */
  .footer-nav {
    gap: 20px 28px;
  }
  
  /* 页面内文章适配 */
  .page-article {
    padding: 28px 20px;
  }
  .page-title {
    font-size: 1.9rem;
  }
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
}

/* 高科技网格卡片 (Grid Cards) - 推荐咨询文章列表 */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: var(--transition);
}

.article-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-hover);
  transform: translateY(-5px);
  box-shadow: 0 14px 35px -10px rgba(99, 102, 241, 0.3);
}

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

.article-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  background: rgba(99, 102, 241, 0.15);
  color: var(--primary-light);
  border: 1px solid rgba(99, 102, 241, 0.3);
  margin-bottom: 14px;
  width: fit-content;
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
  color: var(--text-primary);
  transition: var(--transition);
}

.article-card:hover .article-card-title {
  color: var(--primary-light);
}

.article-card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
}

.article-read-link {
  color: var(--accent-cyan);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
}

.article-card:hover .article-read-link {
  transform: translateX(4px);
}

@media (max-width: 1024px) {
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .hero-title {
    font-size: 1.9rem;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .btn {
    font-size: 0.95rem;
    padding: 12px 20px;
  }
}