:root {
  color-scheme: light;
  --bg: #eef2ef;
  --panel: #ffffff;
  --ink: #17211f;
  --muted: #63716e;
  --line: #dce4e1;
  --teal: #0a7268;
  --teal-dark: #063f3b;
  --gold: #a77b24;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
}

a {
  color: var(--teal-dark);
  text-decoration: none;
  font-weight: 800;
}

.site-header,
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px clamp(18px, 5vw, 64px);
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.site-footer {
  border-top: 1px solid var(--line);
  border-bottom: 0;
  color: var(--muted);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--teal-dark);
  color: #fff;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 18px;
  width: min(1120px, calc(100% - 36px));
  margin: 24px auto;
}

main,
aside {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 16px 38px rgba(23, 33, 31, 0.08);
}

main {
  padding: clamp(22px, 4vw, 38px);
}

aside {
  align-self: start;
  padding: 18px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.12;
}

h2 {
  margin-top: 30px;
  line-height: 1.25;
}

p,
li {
  color: var(--muted);
}

.lead {
  font-size: 18px;
}

.tool-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin: 12px 0;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--teal);
  color: #fff;
}

.note {
  padding: 14px;
  border-left: 4px solid var(--teal);
  border-radius: 8px;
  background: #e7f2ef;
}

.link-list {
  display: grid;
  gap: 10px;
  padding: 0;
  list-style: none;
}

.link-list a {
  display: block;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

@media (max-width: 860px) {
  .layout,
  .site-header,
  .site-footer {
    display: block;
  }

  aside {
    margin-top: 16px;
  }
}