:root{
  --bg: #05070a;
  --card-bg: #0c1017;
  --card-border: #1f2937;
  --gold: #f59e0b;
  --gold-glow: rgba(245, 158, 11, 0.15);
  --green: #10b981;
  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --max-width: 1240px;
}

*{ box-sizing: border-box; }
body{
  margin: 0;
  background-color: var(--bg);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}

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

.container {
  width: min(calc(100% - 48px), var(--max-width));
  margin: 0 auto;
}

/* 顶栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 7, 10, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.nav-container, .nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}
.brand {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-mark, .brand-icon {
  width: 32px;
  height: 32px;
  background: var(--gold);
  color: #000;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-weight: 900;
}
.nav-links, .nav-menu {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav-links a, .nav-menu a {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a[aria-current="page"], .nav-menu a:hover, .nav-menu a.active {
  color: var(--text-main);
}
.lang-badge, .lang {
  font-size: 13px;
  color: var(--text-muted);
  border: 1px solid var(--card-border);
  padding: 6px 12px;
  border-radius: 99px;
}
.btn {
  background: var(--gold);
  color: #000;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 22px;
  border-radius: 99px;
  transition: transform 0.2s, background 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn:hover {
  transform: translateY(-1px);
  background: #fbbf24;
}

/* Hero 区域 */
.hero, .page-hero {
  position: relative;
  padding: 120px 0 90px;
  overflow: hidden;
  background: radial-gradient(circle at 80% 20%, rgba(245, 158, 11, 0.08), transparent 40%),
              radial-gradient(circle at 10% 80%, rgba(16, 185, 129, 0.05), transparent 30%);
}
.hero-grid, .hero .container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}
.eyebrow {
  color: var(--gold);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--gold);
}
.hero h1, .page-hero h1 {
  font-size: clamp(40px, 5vw, 68px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin: 0 0 24px 0;
}
.hero p, .page-hero p {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 0 36px 0;
}
.hero-actions {
  display: flex;
  gap: 16px;
}
.btn.ghost {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--card-border);
}

/* 右侧动态节点卡片 */
.network-card, .hero-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 32px;
  position: relative;
  box-shadow: 0 20px 50px rgba(0,0,0,0.4);
  transform: rotate(1deg);
}
.card-top, .hero-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
  font-size: 12px;
  color: var(--text-muted);
  font-family: monospace;
  letter-spacing: 0.1em;
}
.pulse, .pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--green);
}
.flow, .flow-box {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  background: #080b0f;
  border: 1px solid var(--card-border);
  padding: 20px;
  border-radius: 16px;
  margin-bottom: 24px;
  text-align: center;
  font-weight: 800;
}
.flow-line, .flow-arrow {
  color: var(--gold);
}
.metric-row, .card-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.metric, .spec-item {
  background: #080b0f;
  border: 1px solid var(--card-border);
  padding: 14px;
  border-radius: 12px;
  font-size: 13px;
}
.metric strong, .spec-item strong {
  display: block;
  font-size: 15px;
  color: var(--text-main);
}
.metric span, .spec-item span {
  color: var(--text-muted);
}

/* 优势与网格 */
.section {
  padding: 100px 0;
}
.section.light {
  background: #090d14;
}
.section-head {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}
.section-head h2 {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 12px 0 16px;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.card, .feature {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 36px 30px;
  position: relative;
  transition: transform 0.2s, border-color 0.2s;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 158, 11, 0.3);
}
.card-num {
  font-family: monospace;
  color: var(--gold);
  font-size: 13px;
  margin-bottom: 24px;
  display: block;
}
.card h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 12px 0;
}
.card p {
  color: var(--text-muted);
  font-size: 15px;
  margin: 0;
}

/* 行业方案列表样式 */
.industry-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.industry {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 18px;
  padding: 28px 32px;
  display: grid;
  grid-template-columns: 60px 1fr 2fr;
  gap: 24px;
  align-items: center;
}
.industry b {
  color: var(--gold);
  font-family: monospace;
  font-size: 18px;
}
.industry h3 {
  font-size: 20px;
  margin: 0;
}
.industry p {
  color: var(--text-muted);
  margin: 0;
}

/* 底部旗帜 */
.band {
  background: linear-gradient(135deg, #111827, #0f172a);
  border: 1px solid var(--card-border);
  border-radius: 32px;
  padding: 60px;
  text-align: center;
  margin: 60px auto 100px;
  width: min(calc(100% - 48px), var(--max-width));
}
.band h2 {
  font-size: 36px;
  font-weight: 800;
  margin: 0 0 16px 0;
}
.band p {
  color: var(--text-muted);
  font-size: 16px;
  margin: 0 0 32px 0;
}

/* 页脚 */
.site-footer {
  border-top: 1px solid var(--card-border);
  padding: 50px 0;
  font-size: 13px;
  color: var(--text-muted);
  background: #030406;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255,255,255,0.04);
  padding-top: 25px;
}
.footer-bottom nav {
  display: flex;
  gap: 20px;
}

@media(max-width: 900px) {
  .hero-grid, .hero .container, .grid-3, .grid-2, .industry {
    grid-template-columns: 1fr;
  }
  .network-card, .hero-card {
    transform: none;
  }
}