/* ==========================================================================
   白月光 (BYG Cloud) - 纯净浅色系高转化样式表 (Light Theme)
   零外部依赖 · 原生极速 · 移动端全响应式 · 现代月光纯白设计
   ========================================================================== */

:root {
  /* 纯净浅色基底 */
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --border-color: #e2e8f0;
  --border-focus: rgba(2, 132, 199, 0.35);
  
  /* 文字层级（高对比度阅读体验） */
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  
  /* 白月光品牌主题色（明亮极速蓝 & 优雅紫） */
  --primary: #0284c7;
  --primary-hover: #0369a1;
  --primary-glow: rgba(2, 132, 199, 0.15);
  --accent: #4f46e5;
  --accent-gradient: linear-gradient(135deg, #0284c7 0%, #4f46e5 50%, #7c3aed 100%);
  --gold: #d97706;
  --success: #059669;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  /* 浅色精致微投影体系 */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05), 0 1px 2px rgba(15, 23, 42, 0.03);
  --shadow-md: 0 4px 16px -2px rgba(15, 23, 42, 0.08), 0 2px 6px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 30px -4px rgba(15, 23, 42, 0.1), 0 4px 10px -2px rgba(15, 23, 42, 0.05);
  --shadow-glow: 0 10px 25px rgba(2, 132, 199, 0.12);
}

/* 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-primary);
  color: var(--text-main);
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  background: 
    radial-gradient(circle at 10% 10%, rgba(2, 132, 199, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 90% 30%, rgba(79, 70, 229, 0.05) 0%, transparent 45%),
    radial-gradient(circle at 50% 80%, rgba(124, 58, 237, 0.04) 0%, transparent 50%),
    var(--bg-primary);
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* 容器通用类 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部导航栏（透光白水玻璃效果） */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.03);
  transition: all 0.3s ease;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(2, 132, 199, 0.3);
}

.brand-icon svg {
  width: 20px;
  height: 20px;
  fill: #ffffff;
}

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

.nav-link {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.nav-link.nav-highlight {
  color: var(--primary);
  font-weight: 600;
  padding: 5px 12px;
  background: #e0f2fe;
  border-radius: var(--radius-full);
  border: 1px solid #bae6fd;
  transition: all 0.2s ease;
}

.nav-link.nav-highlight:hover {
  background: #bae6fd;
  color: var(--primary-hover);
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  white-space: nowrap;
  line-height: 1.2;
  text-align: center;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(2, 132, 199, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(2, 132, 199, 0.4);
  color: #ffffff;
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: #f8fafc;
  border-color: rgba(2, 132, 199, 0.3);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-lg {
  padding: 16px 36px;
  font-size: 1.12rem;
  letter-spacing: 0.02em;
}

/* 主视觉区 (Hero Section) */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: #e0f2fe;
  border: 1px solid #bae6fd;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 24px;
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-main);
}

.text-gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 36px;
  font-weight: 400;
  line-height: 1.7;
}

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

/* 核心数据看板 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.stat-item {
  text-align: center;
  padding: 10px;
}

.stat-value {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 4px;
}

.stat-value span {
  color: var(--primary);
  font-size: 1.25rem;
}

.stat-label {
  font-size: 0.86rem;
  color: var(--text-muted);
  font-weight: 500;
}

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

.section-alt {
  background-color: #f1f5f9;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text-main);
}

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

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

.feature-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.feature-card:hover {
  border-color: rgba(2, 132, 199, 0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: #e0f2fe;
  border: 1px solid #bae6fd;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary);
}

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

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

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

/* 流媒体与 AI 支持 */
.support-block {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}

.support-category-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
}

.support-category-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.app-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  transition: all 0.2s ease;
}

.app-badge:hover {
  background: #f0f9ff;
  border-color: #bae6fd;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.app-icon {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-weight: 700;
}

.app-icon svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

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

.pricing-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 34px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(2, 132, 199, 0.4);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  background: linear-gradient(180deg, #ffffff 0%, #f0f9ff 100%);
  border: 2px solid var(--primary);
  box-shadow: 0 8px 30px rgba(2, 132, 199, 0.18);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.popular-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 10px rgba(2, 132, 199, 0.3);
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-main);
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  min-height: 40px;
}

.plan-price-wrap {
  margin-bottom: 24px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.plan-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
}

.plan-amount {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text-main);
}

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

.plan-features {
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.plan-feature-item svg {
  width: 16px;
  height: 16px;
  fill: var(--primary);
  flex-shrink: 0;
}

.plan-cta {
  width: 100%;
  margin-top: auto;
}

/* 用户真实评价 */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: rgba(2, 132, 199, 0.3);
  box-shadow: var(--shadow-md);
}

.rating-stars {
  color: var(--gold);
  font-size: 1.1rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.testimonial-quote {
  font-size: 0.96rem;
  line-height: 1.65;
  color: var(--text-main);
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #e0f2fe;
  border: 1px solid #bae6fd;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: var(--primary);
}

.user-meta-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.user-meta-title {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 常见问题 (FAQ) - 原生 details 零 JS */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.2s ease;
}

.faq-item[open] {
  border-color: #bae6fd;
  box-shadow: var(--shadow-md);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.06rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform 0.25s ease;
  line-height: 1;
}

.faq-item[open] .faq-question::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px solid #f1f5f9;
  padding-top: 16px;
  background: #f8fafc;
}

/* 底部 CTA 卡片 */
.cta-banner {
  background: linear-gradient(135deg, #e0f2fe 0%, #ede9fe 100%);
  border: 1px solid #bae6fd;
  border-radius: var(--radius-lg);
  padding: 50px 24px;
  box-shadow: 0 10px 25px rgba(2, 132, 199, 0.08);
  text-align: center;
}

.cta-banner-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-main);
}

.cta-banner-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 30px;
}

/* 页脚 - 严格保留四个标题 */
.footer {
  border-top: 1px solid var(--border-color);
  background: #ffffff;
  padding: 48px 0 36px;
  margin-top: 60px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all 0.2s ease;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
}

.footer-link:hover {
  color: var(--primary);
  background: #e0f2fe;
}

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

/* 信息文档页面专属样式 */
.doc-header {
  padding: 40px 0 20px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 40px;
}

.doc-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
  transition: transform 0.2s;
}

.doc-back:hover {
  transform: translateX(-4px);
}

.doc-title {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
  color: var(--text-main);
}

.doc-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
}

.doc-content {
  max-width: 900px;
  margin: 0 auto;
  padding-bottom: 80px;
}

.doc-section {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}

.doc-section-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid #f1f5f9;
  padding-bottom: 12px;
}

.doc-text {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 14px;
}

.doc-list {
  padding-left: 20px;
  margin-bottom: 16px;
}

.doc-list li {
  list-style: disc;
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 8px;
}

.alert-box {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  font-size: 0.92rem;
  line-height: 1.6;
  margin: 16px 0;
}

.alert-box-info {
  background: #f0f9ff;
  border-color: #bae6fd;
  color: #0369a1;
}

/* ==========================================================================
   响应式媒体查询 (@media)
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-wrap {
    height: 64px;
  }
  
  .nav-links {
    display: none;
  }
  
  .hero {
    padding: 48px 0 36px;
  }
  
  .hero-title {
    font-size: 2.15rem;
    line-height: 1.25;
  }
  
  .hero-subtitle {
    font-size: 1.05rem;
    margin-bottom: 28px;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 14px;
  }
  
  .hero-actions .btn {
    width: 100%;
    min-height: 50px;
    font-size: 1.08rem;
  }
  
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    padding: 16px;
    gap: 12px;
  }
  
  .stat-value {
    font-size: 1.5rem;
  }
  
  .section {
    padding: 56px 0;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .feature-card {
    padding: 24px 20px;
  }
  
  .support-block {
    padding: 24px 18px;
  }
  
  .app-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .pricing-card {
    padding: 28px 20px;
  }
  
  .pricing-card .btn {
    min-height: 50px;
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  
  .footer-nav {
    flex-direction: column;
    gap: 12px;
  }
  
  .footer-link {
    width: 100%;
    text-align: center;
    padding: 10px;
    font-size: 1.05rem;
  }
  
  .doc-section {
    padding: 22px 18px;
  }
  
  .doc-title {
    font-size: 1.85rem;
  }
}

@media (max-width: 480px) {
  .app-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-stats {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   高科技网格卡片 (High-Tech Grid Cards) - 推荐咨询文章精选
   ========================================================================== */

.tech-article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 24px;
}

.tech-article-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.tech-article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.tech-article-card:hover {
  transform: translateY(-5px);
  border-color: rgba(2, 132, 199, 0.4);
  box-shadow: 0 12px 28px -4px rgba(2, 132, 199, 0.12), var(--shadow-md);
}

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

.tech-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.tech-card-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  background: #e0f2fe;
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
}

.tech-card-time {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.tech-card-title {
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-main);
  margin-bottom: 10px;
  transition: color 0.2s ease;
}

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

.tech-card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.tech-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid #f1f5f9;
  padding-top: 14px;
}

.tech-card-link {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease;
}

.tech-card-link:hover {
  gap: 10px;
}

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

@media (max-width: 768px) {
  .tech-article-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

/* ==========================================================================
   首页品牌视觉画卷 (Hero Visual Art)
   ========================================================================== */

.hero-visual-frame {
  max-width: 960px;
  margin: 0 auto 36px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(2, 132, 199, 0.22);
  box-shadow: 0 16px 40px -10px rgba(2, 132, 199, 0.16), var(--shadow-md);
  position: relative;
  background: #ffffff;
}

.hero-visual-img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-visual-frame:hover .hero-visual-img {
  transform: scale(1.02);
}

.hero-visual-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px 24px;
  background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.82) 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.hero-visual-text {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-visual-tag {
  font-size: 0.8rem;
  padding: 2px 10px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

@media (max-width: 768px) {
  .hero-visual-frame {
    margin-bottom: 24px;
    border-radius: var(--radius-md);
  }
  .hero-visual-caption {
    padding: 10px 14px;
  }
  .hero-visual-text {
    font-size: 0.82rem;
  }
}