/* Minimal Metrics Dashboard (数据大字展示) Theme - High Performance v46 */
:root {
  --metric-bg: #f8fafc;
  --metric-surface: #ffffff;
  --metric-card: #ffffff;
  --metric-primary: #2563eb;
  --metric-primary-hover: #1d4ed8;
  --metric-accent: #3b82f6;
  --metric-heading: #0f172a;
  --metric-text: #334155;
  --metric-muted: #64748b;
  --metric-border: #e2e8f0;
  --metric-radius: 12px;
  --metric-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.12);
  --metric-shadow-lg: 0 20px 35px -10px rgba(15, 23, 42, 0.15);
}

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

html {
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--metric-bg);
  color: var(--metric-text);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

img {
  max-width: 100%;
  height auto;
  display: block;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--metric-border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
  will-change: transform;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--metric-heading);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--metric-primary) 0%, var(--metric-accent) 100%);
  color: #ffffff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--metric-text);
  padding: 8px 0;
  position: relative;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--metric-primary);
  border-radius: 3px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 24px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.25s ease;
  will-change: transform;
}

.btn-primary {
  background: linear-gradient(135deg, var(--metric-primary) 0%, var(--metric-accent) 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.btn-outline {
  background: var(--metric-surface);
  color: var(--metric-heading);
  border: 1px solid var(--metric-border);
}

.btn-outline:hover {
  border-color: var(--metric-primary);
  color: var(--metric-primary);
  transform: translateY(-2px);
}

/* Minimal Metrics Dashboard Banner */
.metrics-dashboard-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 36px 0 10px;
}

.metric-card {
  background: #ffffff;
  border: 1px solid var(--metric-border);
  border-radius: var(--metric-radius);
  padding: 24px 20px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0,0,0,0.03);
  transition: all 0.25s ease;
  will-change: transform;
}

.metric-card:hover {
  border-color: var(--metric-primary);
  transform: translateY(-4px);
  box-shadow: var(--metric-shadow);
}

.metric-number {
  font-size: 38px;
  font-weight: 900;
  color: var(--metric-primary);
  line-height: 1.1;
  margin-bottom: 6px;
  letter-spacing: -1px;
}

.metric-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--metric-heading);
}

.metric-desc {
  font-size: 12px;
  color: var(--metric-muted);
  margin-top: 4px;
}

/* Hero Section */
.hero {
  padding: 55px 0 45px;
  text-align: center;
  background: linear-gradient(180deg, #ffffff 0%, var(--metric-bg) 100%);
  border-bottom: 1px solid var(--metric-border);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 20px;
  font-size: 13px;
  font-weight: 700;
  color: var(--metric-primary);
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: 30px;
  margin-bottom: 22px;
}

.hero-title {
  font-size: 42px;
  font-weight: 900;
  color: var(--metric-heading);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.hero-title span {
  color: var(--metric-primary);
}

.hero-subtitle {
  font-size: 17px;
  color: var(--metric-muted);
  max-width: 780px;
  margin: 0 auto 30px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

/* Hero Showcase Grid */
.hero-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}

.hero-card {
  background: var(--metric-surface);
  border: 1px solid var(--metric-border);
  border-radius: var(--metric-radius);
  padding: 12px;
  box-shadow: var(--metric-shadow);
  transition: all 0.25s ease;
  will-change: transform;
}

.hero-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--metric-shadow-lg);
  border-color: var(--metric-primary);
}

.hero-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 8px;
  content-visibility: auto;
}

.hero-card-caption {
  margin-top: 10px;
  font-size: 13px;
  font-weight: 700;
  color: var(--metric-heading);
}

/* Sections */
.section {
  padding: 65px 0;
  border-bottom: 1px solid var(--metric-border);
  content-visibility: auto;
  contain-intrinsic-size: 1px 600px;
}

.section-panel {
  background: var(--metric-surface);
}

.section-title {
  text-align: center;
  margin-bottom: 40px;
}

.section-title h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--metric-heading);
  margin-bottom: 10px;
}

.section-title p {
  font-size: 15px;
  color: var(--metric-muted);
}

/* 3x3 Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--metric-bg);
  border: 1px solid var(--metric-border);
  border-radius: var(--metric-radius);
  padding: 28px 24px;
  transition: all 0.25s ease;
}

.feature-card:hover {
  background: var(--metric-surface);
  border-color: var(--metric-primary);
  box-shadow: var(--metric-shadow);
  transform: translateY(-4px);
}

.feature-num {
  width: 40px;
  height: 40px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--metric-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 15px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--metric-heading);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--metric-muted);
  line-height: 1.6;
}

/* Blog Section */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.blog-card {
  background: var(--metric-surface);
  border: 1px solid var(--metric-border);
  border-radius: var(--metric-radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: all 0.25s ease;
}

.blog-card:hover {
  box-shadow: var(--metric-shadow);
  border-color: var(--metric-primary);
  transform: translateY(-3px);
}

.blog-date {
  font-size: 12px;
  font-weight: 700;
  color: var(--metric-primary);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.blog-card h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--metric-heading);
  margin-bottom: 10px;
}

.blog-card p {
  font-size: 14px;
  color: var(--metric-muted);
  line-height: 1.6;
  margin-bottom: 18px;
}

.blog-link {
  font-size: 14px;
  font-weight: 700;
  color: var(--metric-primary);
}

.blog-link:hover {
  color: var(--metric-primary-hover);
  text-decoration: underline;
}

.more-wrapper {
  text-align: center;
  margin-top: 36px;
}

/* FAQ Section */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--metric-bg);
  border: 1px solid var(--metric-border);
  border-radius: var(--metric-radius);
  padding: 24px 28px;
}

.faq-question {
  font-size: 17px;
  font-weight: 800;
  color: var(--metric-heading);
  margin-bottom: 8px;
}

.faq-answer {
  font-size: 14px;
  color: var(--metric-muted);
  line-height: 1.7;
}

/* Download Page Grid */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 36px;
}

.download-card {
  background: var(--metric-surface);
  border: 1px solid var(--metric-border);
  border-radius: var(--metric-radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: all 0.25s ease;
}

.download-card:hover {
  box-shadow: var(--metric-shadow);
  border-color: var(--metric-primary);
  transform: translateY(-4px);
}

.download-card-icon {
  font-size: 40px;
  margin-bottom: 14px;
}

.download-card h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--metric-heading);
  margin-bottom: 10px;
}

.download-card p {
  font-size: 14px;
  color: var(--metric-muted);
  margin-bottom: 22px;
}

.download-web-banner {
  background: var(--metric-heading);
  color: #ffffff;
  border-radius: var(--metric-radius);
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.download-web-banner h3 {
  font-size: 20px;
  color: #ffffff;
  margin-bottom: 6px;
}

.download-web-banner p {
  color: #94a3b8;
  font-size: 14px;
}

/* Footer */
.footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 60px 0 30px;
  border-top: 4px solid var(--metric-primary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.footer-col p {
  font-size: 14px;
  color: #94a3b8;
  line-height: 1.7;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 14px;
  color: #94a3b8;
}

.footer-col ul li a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: #64748b;
}

@media (max-width: 992px) {
  .metrics-dashboard-grid {
    grid-template-columns: 1fr 1fr;
  }
  .hero-showcase, .features-grid, .download-grid {
    grid-template-columns: 1fr;
  }
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .download-web-banner {
    flex-direction: column;
    text-align: center;
  }
}