/* www：功能驱动 — 三栏卡片、青绿、胶囊导航 */
html { box-sizing: border-box; }
*, *::before, *::after { box-sizing: inherit; }
body {
  margin: 0;
  background: #eef3f4;
  color: #1a1a2e;
  font-family: "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  line-height: 1.65;
}

.topbar {
  background: #1a1a2e;
  color: #fff;
  padding: 16px 4vw;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 28px;
}
.logo {
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.95rem;
  color: #3ecfc9;
  text-decoration: none;
}
.pills { display: flex; flex-wrap: wrap; gap: 8px; }
.pills a {
  background: #2a2a44;
  color: #dfe8ea;
  text-decoration: none;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.88rem;
}
.pills a.on, .pills a:hover { background: #0d7377; color: #fff; }

.banner {
  padding: 48px 4vw 36px;
  background: #fff;
  border-bottom: 6px solid #0d7377;
}
.banner h1 {
  margin: 0 0 14px;
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  max-width: 18em;
}
.banner .lead { max-width: 46em; color: #3d4450; }
.cta-set { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 10px; }
.cta-set a {
  text-decoration: none;
  padding: 12px 22px;
  font-weight: 700;
  border-radius: 4px;
}
.cta-pri { background: #0d7377; color: #fff; }
.cta-ghost { background: transparent; color: #0d7377; border: 2px solid #0d7377; }

.page { width: min(1120px, 92vw); margin: 0 auto 48px; }
.block { margin-top: 36px; }
.block h2 {
  font-size: 1.25rem;
  margin: 0 0 14px;
  padding-left: 10px;
  border-left: 4px solid #0d7377;
}
.grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.card {
  background: #fff;
  padding: 18px 16px;
  border-radius: 6px;
  box-shadow: 0 8px 18px rgba(13, 115, 119, 0.08);
  border-top: 3px solid #0d7377;
}
.card h3 { margin: 8px 0; font-size: 1.05rem; }
.card p { margin: 0; color: #4a5160; font-size: 0.95rem; }
.ico { width: 28px; height: 28px; fill: #0d7377; }

.prose { background: #fff; padding: 22px 24px; border-radius: 6px; }
.prose p { margin: 0 0 12px; }
.prose ul { margin: 0 0 12px; padding-left: 1.2em; }
table.feat {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}
table.feat th, table.feat td {
  border: 1px solid #c9d6d8;
  padding: 9px 12px;
  text-align: left;
}
table.feat th { background: #0d7377; color: #fff; }
.warn {
  background: #fff4f2;
  border: 1px solid #e3b4ae;
  padding: 16px 18px;
}
.warn h2 { border-left-color: #b33b32; }
.links a {
  display: inline-block;
  margin: 6px 8px 6px 0;
  padding: 9px 14px;
  background: #1a1a2e;
  color: #fff;
  text-decoration: none;
  border-radius: 4px;
  font-size: 0.9rem;
}
.qa { background: #fff; }
.qa article {
  padding: 14px 18px;
  border-bottom: 1px dashed #c5d0d2;
}
.qa h3 { margin: 0 0 8px; font-size: 1rem; color: #0d7377; }
.qa p { margin: 0; color: #3d4450; }

.foot {
  background: #1a1a2e;
  color: #b7c0c8;
  padding: 32px 4vw;
  font-size: 0.86rem;
}
.foot p { margin: 0 0 10px; max-width: 70em; }
.foot a { color: #3ecfc9; }

@media (max-width: 860px) {
  .grid3 { grid-template-columns: 1fr; }
}