/* Theme 07 · Arctic Cyan — 冰蓝、高对比清爽 */
:root {
  --bg-deep: #dff5fb;
  --bg: #ecf9fd;
  --bg-card: #ffffff;
  --bg-card2: #f5fcfe;
  --panel: #e0f4fa;
  --text: #042f2e;
  --text-soft: #134e4a;
  --muted: #447a78;
  --line: rgba(13, 148, 136, 0.11);
  --line-strong: rgba(8, 145, 178, 0.4);
  --accent: #0d9488;
  --accent-dim: #0f766e;
  --accent-blue: #0284c7;
  --accent-blue-dim: #0369a1;
  --accent-violet: #6366f1;
  --accent-violet-dim: #4f46e5;
  --accent-amber: #0891b2;
  --accent-amber-dim: #0e7490;
  --accent-coral: #06b6d4;
  --accent-sky: #22d3ee;
  --gold: #0e7490;
  --gold-soft: rgba(8, 145, 178, 0.12);
  --shadow: 0 18px 48px rgba(8, 73, 82, 0.08);
  --shadow-soft: 0 10px 32px rgba(14, 116, 144, 0.07);
  --glow: 0 8px 32px rgba(13, 148, 136, 0.15);
  --glow-blue: 0 8px 32px rgba(2, 132, 199, 0.13);
  --glow-violet: 0 8px 32px rgba(99, 102, 241, 0.11);
  --radius: 16px;
  --radius-sm: 11px;
  --mesh-base: linear-gradient(180deg, #f5fdff 0%, #e8f8fc 50%, #dcf3fa 100%);
  --mesh-side-violet: rgba(99, 102, 241, 0.11);
  --mesh-side-teal: rgba(13, 148, 136, 0.14);
  --mesh-side-blue: rgba(2, 132, 199, 0.12);
  --mesh-side-amber: rgba(34, 211, 238, 0.12);
}

html { background-color: #c8ebf5; }

body {
  background-image:
    radial-gradient(ellipse 52% 120% at -15% 50%, var(--mesh-side-teal), transparent 55%),
    radial-gradient(ellipse 40% 85% at -8% 72%, var(--mesh-side-amber), transparent 50%),
    radial-gradient(ellipse 50% 118% at 115% 48%, var(--mesh-side-blue), transparent 54%),
    radial-gradient(ellipse 38% 80% at 108% 22%, var(--mesh-side-violet), transparent 48%),
    radial-gradient(ellipse 420px 360px at 0% 0%, rgba(34, 211, 238, 0.12), transparent 55%),
    radial-gradient(ellipse 380px 300px at 100% 100%, rgba(2, 132, 199, 0.09), transparent 52%),
    radial-gradient(ellipse 900px 480px at 50% -5%, rgba(13, 148, 136, 0.08), transparent 60%),
    linear-gradient(90deg,
      rgba(34, 211, 238, 0.09) 0%,
      rgba(255, 255, 255, 0) clamp(120px, 18vw, 340px),
      rgba(255, 255, 255, 0) calc(100% - clamp(120px, 18vw, 340px)),
      rgba(2, 132, 199, 0.08) 100%),
    var(--mesh-base);
  background-attachment: fixed;
}

.hero-grid { grid-template-columns: 1.15fr 1fr; gap: 30px; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }

.h1 {
  background: linear-gradient(125deg, #042f2e 0%, var(--accent-dim) 38%, var(--accent-sky) 70%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-sky), var(--accent-blue-dim));
  box-shadow: 0 8px 28px rgba(2, 132, 199, 0.28);
}
.btn-primary:hover { box-shadow: 0 10px 32px rgba(2, 132, 199, 0.38); }

.nav a:nth-child(1):hover {
  background: rgba(13, 148, 136, 0.13);
  color: var(--accent-dim);
}
.nav a:nth-child(2):hover {
  background: rgba(2, 132, 199, 0.1);
  color: var(--accent-blue);
}
.nav a:nth-child(3):hover {
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-violet);
}
.nav a:nth-child(n+4):hover { background: var(--gold-soft); color: var(--gold); }

.hero-side-card::before {
  background: linear-gradient(90deg, var(--accent), var(--accent-sky), var(--accent-blue), var(--accent-violet), #67e8f9);
}

/* —— 版式：更宽容器 + 特点四宫变两列横排图标 + 推荐阅读面板化 —— */
.container {
  max-width: 1260px;
}
.grid4 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
@media (max-width: 560px) {
  .grid4 { grid-template-columns: 1fr; }
}
.grid4 .feature-card {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 14px;
}
.grid4 .feature-icon {
  margin-bottom: 0;
}
.grid-trust {
  gap: 10px;
}
.readmore-section {
  margin-top: 1.5rem;
  padding: 1.2rem 1.35rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-card);
  box-shadow: var(--shadow-soft);
}
.quote-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
@media (max-width: 900px) {
  .quote-grid { grid-template-columns: 1fr; }
}

/* —— 气质Ⅱ：数据科技 · 等宽数字感 + 冰色描边模块 —— */
.meta,
.date,
.brand-sub,
.pager a,
.kpi .meta {
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.03em;
}
.trust-item {
  border: 1px solid rgba(34, 211, 238, 0.3);
  background: linear-gradient(145deg, #ffffff, rgba(236, 254, 255, 0.72));
}
.security-box {
  border: 1px solid rgba(2, 132, 199, 0.22);
}
.btn:not(.btn-primary) {
  border-color: rgba(2, 132, 199, 0.28);
  background: rgba(255, 255, 255, 0.88);
}
.section-title {
  letter-spacing: 0.02em;
}
.quote {
  border: 1px solid rgba(2, 132, 199, 0.15);
  background: linear-gradient(165deg, #ffffff, rgba(240, 253, 255, 0.9));
}