/* 尔音打卡 官网 / 法务页 共用样式
 * 部署位置：https://eryinai.com/app/
 * 说明：无外部依赖（不引 CDN），保证在国内网络与审核环境下稳定打开。
 */

:root {
  --brand: #6366f1;
  --brand-dark: #4f46e5;
  --text: #1f2430;
  --text-2: #4b5563;
  --text-3: #8b93a3;
  --bg: #ffffff;
  --bg-soft: #f7f8fc;
  --border: #e6e8f0;
  --max: 960px;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
}

a { color: var(--brand-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, #818cf8, var(--brand));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px; font-weight: 700;
}
.site-nav { display: flex; gap: 22px; font-size: 14px; }
.site-nav a { color: var(--text-2); }
.site-nav a:hover { color: var(--brand-dark); }

/* ---------- 首屏 ---------- */
.hero {
  background: linear-gradient(180deg, var(--bg-soft) 0%, #fff 100%);
  padding: 64px 0 56px;
  text-align: center;
}
.hero h1 { font-size: 38px; line-height: 1.3; letter-spacing: -.5px; }
.hero .sub { margin-top: 16px; font-size: 17px; color: var(--text-2); }
.hero .badges { margin-top: 22px; display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.badge {
  font-size: 13px; color: var(--brand-dark);
  background: #eef0ff; border: 1px solid #dcdffc;
  padding: 4px 12px; border-radius: 999px;
}

/* ---------- 通用区块 ---------- */
section { padding: 48px 0; }
section + section { border-top: 1px solid var(--border); }
h2 { font-size: 24px; margin-bottom: 8px; letter-spacing: -.3px; }
.lead { color: var(--text-2); margin-bottom: 28px; font-size: 15px; }

/* ---------- 功能卡 ---------- */
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.card {
  border: 1px solid var(--border); border-radius: 14px;
  padding: 20px; background: #fff;
}
.card h3 { font-size: 16px; margin-bottom: 8px; }
.card p { font-size: 14px; color: var(--text-2); }
.card .ico { font-size: 20px; margin-bottom: 10px; display: block; }

/* ---------- 截图位 ---------- */
.shots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.shot {
  position: relative;
  border: 1px solid var(--border); border-radius: 16px; overflow: hidden;
  background: #fff; aspect-ratio: 9 / 19.5;
}
/* 截图还没放上去时，显示这个占位（img 加载成功后会自动盖住它） */
.shot::after {
  content: attr(data-label);
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-soft); color: var(--text-3);
  font-size: 13px; line-height: 1.6; text-align: center; padding: 16px;
}
.shot img {
  position: relative; z-index: 1;
  width: 100%; height: 100%; object-fit: cover; display: block;
}

/* ---------- 下载 ---------- */
.dl { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.dl-card {
  border: 1px solid var(--border); border-radius: 14px; padding: 22px;
  display: flex; flex-direction: column; gap: 10px;
}
.dl-card b { font-size: 16px; }
.dl-card span { font-size: 14px; color: var(--text-2); }
.btn {
  display: inline-block; margin-top: 6px; padding: 10px 18px;
  border-radius: 10px; background: var(--brand); color: #fff;
  font-size: 14px; font-weight: 600; width: fit-content;
}
.btn:hover { background: var(--brand-dark); text-decoration: none; }
.btn.ghost { background: #fff; color: var(--text-3); border: 1px dashed var(--border); }

/* ---------- 法务页正文 ---------- */
.doc { padding: 40px 0 64px; }
.doc h1 { font-size: 28px; margin-bottom: 6px; }
.doc .updated { font-size: 13px; color: var(--text-3); margin-bottom: 28px; }
.doc h2 { font-size: 18px; margin: 32px 0 10px; }
.doc p, .doc li { font-size: 15px; color: var(--text-2); }
.doc ul, .doc ol { padding-left: 22px; margin: 8px 0; }
.doc li { margin: 4px 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 14px; }
.doc th, .doc td { border: 1px solid var(--border); padding: 9px 12px; text-align: left; vertical-align: top; }
.doc th { background: var(--bg-soft); color: var(--text); font-weight: 600; }
.doc strong { color: var(--text); }
.back { display: inline-block; margin-bottom: 20px; font-size: 14px; }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--border); background: var(--bg-soft);
  padding: 32px 0; font-size: 13px; color: var(--text-2);
}
.site-footer .row { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.site-footer .links { display: flex; gap: 18px; flex-wrap: wrap; }
.site-footer a { color: var(--text-2); }
.site-footer .beian { margin-top: 14px; color: var(--text-3); }

@media (max-width: 720px) {
  .hero { padding: 44px 0 36px; }
  .hero h1 { font-size: 28px; }
  .grid, .dl { grid-template-columns: 1fr; }
  .shots { grid-template-columns: repeat(2, 1fr); }
  .site-nav { gap: 14px; font-size: 13px; }
  .site-nav a.hide-sm { display: none; }
}