/**
 * 数字地球系列 · 主题 SEO 落地页共享样式
 * 深空蓝 + 主题色点缀, 与门户 (?theme=) 观感一致
 */

:root {
  --accent: #3b82f6;
  --bg: #020617;
  --card: rgba(15, 23, 42, 0.75);
  --border: rgba(148, 163, 184, 0.22);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --dim: #64748b;
}

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

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, sans-serif;
  background:
    radial-gradient(ellipse at 20% -10%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 55%),
    radial-gradient(ellipse at 85% 110%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 50%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.7;
  padding: 28px 18px 60px;
}

.wrap {
  max-width: 860px;
  margin: 0 auto;
}

/* 面包屑 */
.crumb {
  font-size: 13px;
  color: var(--dim);
  margin-bottom: 34px;
}

.crumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.crumb a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.crumb .sep {
  margin: 0 6px;
  color: #334155;
}

/* 标题区 */
.hero {
  text-align: center;
  margin-bottom: 30px;
}

.hero h1 {
  font-size: clamp(30px, 5.5vw, 46px);
  letter-spacing: 4px;
  color: #f8fafc;
}

.hero .en {
  display: block;
  font-size: 12px;
  letter-spacing: 5px;
  color: var(--accent);
  margin-top: 8px;
  text-transform: uppercase;
}

.hero .tagline {
  margin-top: 14px;
  font-size: 15px;
  color: var(--muted);
}

/* 统计卡 */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 26px 0 34px;
}

.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: 12px;
  padding: 14px 12px;
  text-align: center;
  backdrop-filter: blur(6px);
}

.stat .v {
  display: block;
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.stat .l {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

/* 内容区 */
.section {
  margin-bottom: 34px;
}

.section h2 {
  font-size: 18px;
  letter-spacing: 2px;
  color: #f1f5f9;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--border);
  margin-bottom: 14px;
}

.section h2::before {
  content: "◆ ";
  font-size: 12px;
  color: var(--accent);
}

.section p {
  font-size: 14.5px;
  color: #cbd5e1;
}

/* 条目行 */
.rows {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
}

.row .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--row-color, var(--accent));
  box-shadow: 0 0 8px color-mix(in srgb, var(--row-color, var(--accent)) 70%, transparent);
  flex-shrink: 0;
}

.row .name {
  font-size: 14.5px;
  font-weight: 600;
  color: #f1f5f9;
  min-width: 110px;
}

.row .meta {
  font-size: 12px;
  color: var(--dim);
  min-width: 76px;
  font-variant-numeric: tabular-nums;
}

.row .desc {
  font-size: 13px;
  color: var(--muted);
  flex: 1;
}

/* CTA */
.cta-box {
  text-align: center;
  margin-top: 40px;
}

.cta {
  display: inline-block;
  padding: 13px 34px;
  font-size: 16px;
  letter-spacing: 2px;
  color: #f8fafc;
  text-decoration: none;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 88%, #000), var(--accent));
  border-radius: 999px;
  box-shadow: 0 6px 22px color-mix(in srgb, var(--accent) 45%, transparent);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px color-mix(in srgb, var(--accent) 60%, transparent);
}

.cta small {
  display: block;
  font-size: 11px;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 2px;
}

/* 页脚 */
.foot {
  margin-top: 52px;
  text-align: center;
  font-size: 12px;
  color: var(--dim);
}

.foot a {
  color: var(--muted);
  text-decoration: none;
}

.foot a:hover {
  color: var(--accent);
}

/* 主题切换导航 */
.theme-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin: 26px 0 8px;
}

.theme-nav a {
  font-size: 12.5px;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 14px;
  transition: all 0.15s ease;
}

.theme-nav a:hover {
  color: #f1f5f9;
  border-color: var(--accent);
}

.theme-nav a.active {
  color: var(--accent);
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  font-weight: 600;
}

@media (max-width: 640px) {
  .stats {
    grid-template-columns: 1fr;
  }
  .row {
    flex-wrap: wrap;
  }
  .row .desc {
    flex-basis: 100%;
  }
}