:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fa;
  --ink: #1a1d21;
  --ink-2: #5a6472;
  --line: #e6eaef;
  --brand: #c0392b;
  --brand-soft: #fdf1ef;
  --radius: 14px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 22px; }

/* ---------- 顶栏 ---------- */
header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .5px; }
.logo .mark {
  width: 28px; height: 28px; border-radius: 8px; display: block;
  background: #fff; border: 1px solid var(--line);
  box-shadow: 0 1px 2px rgba(20, 26, 38, .08);
  object-fit: contain;
}
.nav a { color: var(--ink-2); text-decoration: none; font-size: 14px; margin-left: 26px; }
.nav a:hover { color: var(--brand); }

/* ---------- Hero ---------- */
.hero { padding: 74px 0 62px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.tag {
  display: inline-block; font-size: 13px; color: var(--brand);
  background: var(--brand-soft); border-radius: 999px;
  padding: 5px 13px; margin-bottom: 20px; font-weight: 600;
}
h1 { font-size: 40px; line-height: 1.28; letter-spacing: -.5px; font-weight: 700; }
.hero p.lead { margin-top: 20px; color: var(--ink-2); font-size: 17px; max-width: 30em; }
.hero .meta { margin-top: 28px; color: var(--ink-2); font-size: 14px; }
.hero .meta span { margin-right: 20px; }

.phone {
  justify-self: center;
  width: 214px; height: 436px; border-radius: 34px;
  background: #10131a; padding: 9px;
  box-shadow: 0 26px 60px rgba(20, 26, 38, .18);
}
.phone .screen {
  width: 100%; height: 100%; border-radius: 27px; overflow: hidden;
  background: var(--bg-soft); display: flex; flex-direction: column;
}
.phone .bar { height: 34px; background: var(--brand); }
.phone .body { flex: 1; padding: 14px; display: grid; gap: 9px; align-content: start; }
.skel { height: 13px; border-radius: 6px; background: #e3e8ee; }
.skel.w70 { width: 70%; }
.skel.w45 { width: 45%; }
.card-mini {
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 11px; display: grid; gap: 7px;
}

/* ---------- 分区 ---------- */
section { padding: 58px 0; }
section.soft { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2 { font-size: 26px; letter-spacing: -.3px; margin-bottom: 10px; }
.sub { color: var(--ink-2); margin-bottom: 34px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.feature {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 20px;
}
.feature h3 { font-size: 16px; margin-bottom: 8px; }
.feature p { color: var(--ink-2); font-size: 14.5px; }
.ico {
  width: 34px; height: 34px; border-radius: 9px; background: var(--brand-soft);
  color: var(--brand); display: grid; place-items: center;
  font-size: 16px; margin-bottom: 14px; font-weight: 700;
}

/* ---------- 联系方式 ---------- */
.contact-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; display: grid; grid-template-columns: 1fr 1fr; gap: 26px;
}
.contact-card dt { font-size: 13px; color: var(--ink-2); margin-bottom: 4px; }
.contact-card dd { font-size: 16px; font-weight: 600; word-break: break-all; }

/* ---------- 隐私政策正文 ---------- */
.doc { max-width: 760px; margin: 0 auto; padding: 44px 0 70px; }
.doc h1 { font-size: 28px; margin-bottom: 8px; }
.doc .updated { color: var(--ink-2); font-size: 14px; margin-bottom: 32px; }
.doc h2 { font-size: 18px; margin: 34px 0 10px; }
.doc p, .doc li { color: #333a44; font-size: 15.5px; }
.doc ul { padding-left: 22px; margin: 10px 0; }
.doc li { margin: 6px 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 14.5px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.doc th { background: var(--bg-soft); font-weight: 600; }

/* ---------- 页脚 ---------- */
footer {
  border-top: 1px solid var(--line); background: var(--bg-soft);
  padding: 34px 0; color: var(--ink-2); font-size: 13.5px;
}
footer .row { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; align-items: center; }
footer a { color: var(--ink-2); text-decoration: none; }
footer a:hover { color: var(--brand); }
.icp { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; gap: 34px; }
  h1 { font-size: 30px; }
  .phone { transform: scale(.9); }
  .grid, .grid.two { grid-template-columns: 1fr; }
  .contact-card { grid-template-columns: 1fr; }
  section { padding: 44px 0; }
  .hero { padding: 44px 0 36px; }
  .nav .links { display: none; }
}