:root {
  color-scheme: light;
  --ink: #172126;
  --muted: #607078;
  --teal: #0f8f87;
  --teal-soft: #e8f6f4;
  --line: #dce7e7;
  --paper: #ffffff;
  --background: #f4f8f7;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--background);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}

a { color: var(--teal); }

.shell { max-width: 880px; margin: 0 auto; padding: 28px 20px 56px; }
.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 26px; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 13px; background: var(--teal); color: white; font-size: 22px; }
.brand-name { font-size: 20px; font-weight: 700; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 20px; padding: 30px; box-shadow: 0 8px 28px rgba(23, 33, 38, .05); }
h1 { margin: 0 0 8px; font-size: 30px; line-height: 1.3; }
h2 { margin: 28px 0 8px; font-size: 19px; line-height: 1.4; }
p { margin: 10px 0; }
.lead { color: var(--muted); font-size: 17px; }
.notice { padding: 14px 16px; border-radius: 12px; background: var(--teal-soft); margin: 22px 0; }
.links { display: grid; gap: 10px; margin: 22px 0; }
.link-card { display: block; padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px; text-decoration: none; }
.link-card strong { display: block; color: var(--ink); }
.link-card span { color: var(--muted); font-size: 14px; }
ul { padding-left: 22px; }
footer { color: var(--muted); font-size: 13px; margin-top: 22px; }
footer p { margin: 3px 0; }
@media (max-width: 600px) { .shell { padding: 18px 14px 40px; } .card { padding: 22px 18px; } h1 { font-size: 26px; } }