/* ==========================================================================
   流量光 (FlowLight) - 原生高质感浅色专业样式表
   极简秒开 · 纯净明亮 · 现代高级质感 · 移动端全响应式适配
   ========================================================================== */

:root {
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-elevated: #f1f5f9;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-gradient: linear-gradient(135deg, #2563eb 0%, #0284c7 100%);
  --accent-cyan: #0284c7;
  --accent-emerald: #059669;
  --accent-purple: #7c3aed;
  --accent-amber: #d97706;
  --accent-rose: #e11d48;
  --border-light: #e2e8f0;
  --border-card: #e2e8f0;
  --border-glow: #bfdbfe;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 20px 40px -12px rgba(37, 99, 235, 0.15);
  --shadow-glow: 0 8px 25px rgba(37, 99, 235, 0.28);
  --container-max: 1180px;
  --transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  scroll-behavior: smooth;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  background-color: var(--bg-page);
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.07) 0%, transparent 55%),
    radial-gradient(circle at 90% 25%, rgba(2, 132, 199, 0.05) 0%, transparent 40%);
  min-height: 100vh;
}

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

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

/* 容器布局 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 顶部导航栏 - 清亮磨砂玻璃 */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background-color: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--border-light);
  height: 72px;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.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: var(--radius-sm);
  background: var(--primary-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

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

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

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

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

/* 核心行动按钮 (CTA) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 11px 22px;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
  touch-action: manipulation;
  min-height: 44px;
}

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

.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8 0%, #0284c7 100%);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.38);
}

.btn-secondary {
  background-color: #ffffff;
  border: 1px solid #cbd5e1;
  color: var(--text-main);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.btn-secondary:hover {
  background-color: #f8fafc;
  border-color: #94a3b8;
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn-large {
  padding: 14px 32px;
  font-size: 1.05rem;
  border-radius: var(--radius-full);
  min-height: 50px;
}

.btn-block {
  width: 100%;
}

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

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background-color: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  color: #1d4ed8;
  margin-bottom: 24px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 6px rgba(5, 150, 105, 0.6);
}

.hero-title {
  font-size: clamp(2.3rem, 5.5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.035em;
  color: var(--text-main);
  margin-bottom: 22px;
  max-width: 920px;
  margin-left: auto;
  margin-right: auto;
}

.gradient-text {
  background: linear-gradient(135deg, #1d4ed8 0%, #0284c7 50%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.22rem);
  color: var(--text-muted);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 38px;
  line-height: 1.75;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

/* 核心指标统计条 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.05);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 500;
}

/* 通用区块标题 */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-main);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 核心优势卡片网格 */
.features-section {
  padding: 80px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 34px 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: #93c5fd;
  box-shadow: var(--shadow-md);
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: #eff6ff;
  border: 1px solid #dbeafe;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 22px;
}

.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: 1.68;
}

/* 流媒体与 AI 支持专区 */
.media-ai-section {
  padding: 80px 0;
  background-color: #f1f5f9;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.media-ai-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.unlock-box {
  background-color: #ffffff;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 38px 34px;
  box-shadow: var(--shadow-sm);
}

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

.unlock-box-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
}

.ai-icon-bg {
  background: linear-gradient(135deg, #059669 0%, #0284c7 100%);
}

.media-icon-bg {
  background: linear-gradient(135deg, #e11d48 0%, #f97316 100%);
}

.unlock-box-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
}

.unlock-box-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  line-height: 1.65;
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.service-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background-color: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  color: #334155;
  transition: var(--transition);
}

.service-tag:hover {
  background-color: #eff6ff;
  border-color: #bfdbfe;
  color: var(--primary);
  transform: translateY(-1px);
}

.tag-badge-ok {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
}

/* 价格套餐对比表 */
.pricing-section {
  padding: 80px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.pricing-card {
  background-color: #ffffff;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-5px);
  border-color: #93c5fd;
  box-shadow: var(--shadow-md);
}

.pricing-card.featured {
  background-color: #ffffff;
  border: 2px solid var(--primary);
  box-shadow: 0 16px 36px -8px rgba(37, 99, 235, 0.18), 0 4px 12px rgba(0, 0, 0, 0.05);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-4px);
  box-shadow: 0 20px 42px -6px rgba(37, 99, 235, 0.25);
}

.featured-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.pricing-name {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.pricing-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  min-height: 44px;
  margin-bottom: 24px;
  line-height: 1.6;
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

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

.price-amount {
  font-size: 2.9rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
}

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

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 36px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.93rem;
  color: #334155;
}

.pricing-feature-item strong {
  color: var(--text-main);
}

.check-icon {
  width: 18px;
  height: 18px;
  color: var(--accent-emerald);
  flex-shrink: 0;
}

/* 用户真实口碑 */
.reviews-section {
  padding: 80px 0;
  background-color: #f1f5f9;
  border-top: 1px solid var(--border-light);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background-color: #ffffff;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}

.review-stars {
  display: flex;
  gap: 4px;
  color: var(--accent-amber);
  margin-bottom: 16px;
  font-size: 1.1rem;
}

.review-text {
  font-size: 0.96rem;
  color: #334155;
  line-height: 1.72;
  margin-bottom: 24px;
  font-style: normal;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-light);
  padding-top: 18px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--primary);
  font-size: 0.95rem;
}

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

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

/* 常见问题 (FAQ) */
.faq-section {
  padding: 80px 0;
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-item[open] {
  border-color: #93c5fd;
  box-shadow: var(--shadow-md);
}

.faq-summary {
  padding: 22px 26px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  transition: var(--transition);
}

.faq-summary:hover {
  color: var(--primary);
}

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

.faq-icon-arrow {
  width: 20px;
  height: 20px;
  transition: transform 0.25s ease;
  color: var(--text-dim);
}

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

.faq-content {
  padding: 0 26px 24px;
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.75;
  border-top: 1px solid #f1f5f9;
  padding-top: 14px;
}

/* 底部 CTA 呼吁卡片 */
.cta-banner-section {
  padding: 60px 0 80px;
}

.cta-banner {
  background: linear-gradient(135deg, #eff6ff 0%, #f0fdfa 100%);
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  box-shadow: 0 16px 36px rgba(37, 99, 235, 0.08);
}

.cta-banner-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
}

.cta-banner-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 36px;
}

/* 严格规定的页脚规范：仅保留四个标题，在新页面打开展示 */
.footer {
  border-top: 1px solid var(--border-light);
  background-color: #ffffff;
  padding: 48px 0 36px;
}

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

.footer-nav-link {
  font-size: 1.05rem;
  font-weight: 600;
  color: #334155;
  transition: var(--transition);
  position: relative;
  padding: 4px 0;
}

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

.footer-nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: var(--transition);
}

.footer-nav-link:hover::after {
  width: 100%;
}

.footer-copyright {
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-dim);
}

/* 子页面标准模板 (关于我们、服务条款、隐私政策、网站地图) */
.subpage-header {
  padding: 70px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-light);
  background: radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
}

.subpage-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
}

.subpage-subtitle {
  font-size: 1.02rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

.subpage-body {
  padding: 60px 0 90px;
  max-width: 860px;
  margin: 0 auto;
}

.subpage-card {
  background-color: #ffffff;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 44px 38px;
  margin-bottom: 30px;
  box-shadow: var(--shadow-sm);
}

.subpage-card h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.subpage-card p {
  font-size: 1rem;
  color: #334155;
  line-height: 1.8;
  margin-bottom: 18px;
}

.subpage-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 18px;
}

.subpage-card li {
  font-size: 0.98rem;
  color: #334155;
  position: relative;
  padding-left: 22px;
  line-height: 1.65;
}

.subpage-card li::before {
  content: "•";
  position: absolute;
  left: 6px;
  color: var(--primary);
  font-size: 1.3rem;
  line-height: 1.2;
}

.highlight-box {
  background-color: #eff6ff;
  border-left: 4px solid var(--primary);
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 22px 0;
  font-size: 0.96rem;
  color: #1e3a8a;
  line-height: 1.75;
}

.danger-box {
  background-color: #fef2f2;
  border-left: 4px solid #ef4444;
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 22px 0;
  font-size: 0.96rem;
  color: #991b1b;
  line-height: 1.75;
}

/* 网站地图专有样式 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.sitemap-section-card {
  background-color: #ffffff;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
}

.sitemap-section-title {
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

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

.sitemap-link-item a {
  color: var(--text-muted);
  font-size: 0.96rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

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

/* ==========================================================================
   响应式媒体查询 (@media) - 确保手机端完美单栏自适应与手指触控
   ========================================================================== */

@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

  .nav-menu {
    display: none; /* 移动端隐藏常规菜单，保留核心行动按钮 */
  }

  .hero-section {
    padding: 50px 0 40px;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
    gap: 14px;
  }

  .hero-buttons .btn {
    width: 100%;
    min-height: 48px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 18px;
  }

  .features-grid {
    grid-template-columns: 1fr; /* 单栏显示 */
    gap: 16px;
  }

  .media-ai-container {
    grid-template-columns: 1fr; /* 单栏显示 */
    gap: 20px;
  }

  .pricing-grid {
    grid-template-columns: 1fr; /* 单栏显示 */
  }

  .reviews-grid {
    grid-template-columns: 1fr; /* 单栏显示 */
    gap: 16px;
  }

  .sitemap-grid {
    grid-template-columns: 1fr;
  }

  .cta-banner {
    padding: 40px 20px;
  }

  .footer-nav-only {
    flex-direction: column;
    gap: 18px;
    text-align: center;
  }

  .subpage-card {
    padding: 28px 20px;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-stats {
    grid-template-columns: 1fr; /* 极小屏单列 */
  }

  .stat-item {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-light);
  }

  .stat-item:last-child {
    border-bottom: none;
  }
}

/* ==========================================================================
   高科技网格卡片 (Grid Cards) 布局专有样式
   ========================================================================== */

.tech-grid-section {
  margin: 40px 0 50px;
}

.tech-grid-header {
  text-align: center;
  margin-bottom: 36px;
}

.tech-grid-title {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}

.tech-grid-desc {
  font-size: 0.98rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

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

.tech-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
}

.tech-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: var(--transition);
}

.tech-card:hover {
  transform: translateY(-4px);
  border-color: #93c5fd;
  box-shadow: var(--shadow-md);
}

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

.tech-card.highlight {
  border: 2px solid var(--primary);
  background: linear-gradient(180deg, #ffffff 0%, #f0f7ff 100%);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.12);
}

.tech-card-badge {
  display: inline-block;
  align-self: flex-start;
  padding: 4px 10px;
  background-color: #eff6ff;
  border: 1px solid #bfdbfe;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}

.tech-card-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 12px;
  transition: var(--transition);
}

.tech-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: 20px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tech-card-footer {
  border-top: 1px solid var(--border-light);
  padding-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.tech-card-link {
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.tech-card:hover .tech-card-link {
  text-decoration: underline;
}

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

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

/* ==========================================================================
   首页主视觉概念美图展示组件 (Hero Image Showcase)
   ========================================================================== */

.hero-image-showcase {
  max-width: 920px;
  margin: 0 auto 44px;
  padding: 0 10px;
}

.hero-image-wrapper {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px -12px rgba(37, 99, 235, 0.16), 0 10px 20px -5px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.hero-image-wrapper:hover {
  border-color: #93c5fd;
  box-shadow: 0 24px 60px -10px rgba(37, 99, 235, 0.22);
}

.hero-concept-img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-image-wrapper:hover .hero-concept-img {
  transform: scale(1.02);
}

.hero-image-caption {
  padding: 14px 24px;
  background-color: #ffffff;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.caption-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background-color: #eff6ff;
  border: 1px solid #bfdbfe;
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.caption-text {
  font-size: 0.88rem;
  color: #475569;
  text-align: right;
}

@media (max-width: 768px) {
  .hero-image-caption {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 12px 16px;
  }
  .caption-text {
    text-align: left;
  }
}